阅读说明：本技术 连通模式非连续接收中的调度请求操作 (Scheduling request operation in connected mode discontinuous reception ) 是由 S·朴 M·科什内维桑 张晓霞 骆涛 J·孙 W·南 于 2020-02-11 设计创作，主要内容包括：描述了用于无线通信的方法、系统和设备。用户装备(UE)当在连通非连续接收模式中操作时可以使用一个或多个天线子阵列来执行与一个或多个对应传送接收点(TRP)的调度请求(SR)操作。在一些实现中,该UE可以接收指示它的天线子阵列集合和与其执行SR操作的对应TRP集合的配置。基于该配置,该UE可使用它的天线子阵列集合来向该TRP集合传送SR,从该TRP集合中的至少一个TRP接收上行链路准予,以及向该至少一个TRP传送上行链路数据。附加地或替换地,UE可以自主地确定用于SR操作的天线振子集合和TRP集合,以及在传送SR时传送对该确定的指示。(Methods, systems, and devices for wireless communication are described. A User Equipment (UE) may perform a Scheduling Request (SR) operation with one or more corresponding Transmission Reception Points (TRPs) using one or more antenna sub-arrays when operating in a connected discontinuous reception mode. In some implementations, the UE may receive a configuration indicating its set of antenna subarrays and a corresponding set of TRPs with which to perform SR operations. Based on the configuration, the UE may use its set of antenna subarrays to transmit an SR to the set of TRPs, receive an uplink grant from at least one TRP in the set of TRPs, and transmit uplink data to the at least one TRP. Additionally or alternatively, the UE may autonomously determine a set of antenna elements and a set of TRPs for SR operation and transmit an indication of the determination when transmitting the SR.)

1. A method for wireless communication at a User Equipment (UE), comprising:

receiving a configuration indicating a set of antenna subarrays or a set of transmit receive points, or a combination thereof, of the UE for the UE to use to communicate when operating in a discontinuous reception mode;

transmitting a scheduling request based at least in part on the received configuration when operating in the discontinuous reception mode;

receiving an uplink grant in response to the transmitted scheduling request; and

transmitting uplink data based at least in part on the received uplink grant and the received configuration.

2. The method of claim 1, wherein transmitting the scheduling request comprises: transmitting the scheduling request to a plurality of transmission receiving points using a plurality of antenna sub-arrays of the UE, wherein the set of transmission receiving points of the UE includes the plurality of transmission receiving points, and the set of antenna sub-arrays includes the plurality of antenna sub-arrays.

3. The method of claim 1, wherein transmitting the scheduling request comprises: transmitting the scheduling request using the set of antenna sub-arrays indicated by the received configuration, the set of antenna sub-arrays comprising a subset of a plurality of antenna sub-arrays of the UE.

4. The method of claim 1, wherein receiving the configuration comprises: the configuration is received in one or more of radio resource control signaling, Downlink Control Information (DCI), or a Media Access Control (MAC) control element.

5. The method of claim 1, further comprising selecting, by the UE, at least one antenna sub-array of a plurality of antenna sub-arrays of the UE for performing one or more of: transmit the scheduling request, receive the uplink grant, or transmit the uplink data.

6. The method of claim 1, wherein receiving the uplink grant in response to the transmitted scheduling request comprises:

receiving an uplink grant from a first transmission-reception point of the set of transmission-reception points for the first transmission-reception point in response to the transmitted scheduling request; and

receiving an uplink grant from a second transmitting receiving point of the set of transmitting receiving points for the second transmitting receiving point in response to the transmitted scheduling request.

7. The method of claim 1, wherein the set of transmit receive points comprises a plurality of transmit receive points, the method further comprising: receiving an uplink grant for each of the plurality of transmitting and receiving points in response to the transmitted scheduling request.

8. The method of claim 1, wherein the scheduling request is transmitted to a first transmission-reception point of the set of transmission-reception points, and the uplink grant is received from the first transmission-reception point in response to the transmitted scheduling request.

9. The method of claim 1, wherein the set of transmit receive points comprises a plurality of transmit receive points, and transmitting the uplink data comprises transmitting uplink data to each of the plurality of transmit receive points.

10. The method of claim 1, wherein transmitting the uplink data comprises:

identifying that one or more transmitting receiving points of the set of transmitting receiving points have transmitted an uplink grant in response to the transmitted scheduling request; and

transmitting uplink data to the one or more transmission receiving points based at least in part on the identification.

11. A method for wireless communication at a User Equipment (UE), comprising:

transmitting a scheduling request when operating in a discontinuous reception mode, the scheduling request comprising an indication of a set of antenna subarrays of the UE, or a set of transmit receive points, or a combination thereof;

receiving an uplink grant in response to the transmitted scheduling request; and

transmitting uplink data based at least in part on the indication in the received uplink grant and the transmitted scheduling request.

12. The method of claim 11, wherein the set of transmit receive points comprises a plurality of transmit receive points, the method further comprising: transmitting uplink data to the plurality of transmitting receiving points using a plurality of antenna sub-arrays of the UE based at least in part on the received uplink grant and the indication in the transmitted scheduling request, the set of antenna sub-arrays including the plurality of antenna sub-arrays.

13. The method of claim 11, wherein receiving the uplink grant in response to the transmitted scheduling request comprises: receiving the uplink grant using the set of antenna subarrays of the UE indicated in the transmitted scheduling request.

14. The method of claim 11, further comprising:

determining a channel quality associated with one or more of: each transmit receive point of the set of transmit receive points, or each antenna subarray of the set of antenna subarrays of the UE; and

determining one or more of the set of transmit receive points or the set of antenna sub-arrays based at least in part on the determined channel quality, wherein the transmitted scheduling request indicates the determined set of transmit receive points or the determined set of antenna sub-arrays.

15. A method for wireless communications at a base station, comprising:

transmitting, to a User Equipment (UE), a configuration indicating a set of antenna sub-arrays of the UE, or a set of transmit receive points, or a combination thereof, for use by the UE to communicate when operating in a discontinuous reception mode;

receiving a scheduling request from the UE based at least in part on the transmitted configuration;

transmitting an uplink grant to the UE in response to the received scheduling request; and

receive uplink data from the UE based at least in part on the transmitted uplink grant.

16. The method of claim 15, wherein receiving the scheduling request comprises receiving the scheduling request via a plurality of transmission receiving points, wherein each of the plurality of transmission receiving points monitors for a scheduling request from the UE.

17. The method of claim 15, wherein receiving the scheduling request comprises: receiving the scheduling request via one of the set of transmission reception points, wherein each transmission reception point of the set of transmission reception points monitors for a scheduling request from the UE.

18. The method of claim 15, wherein receiving the scheduling request comprises:

identifying an anchor transmit receive point in the set of transmit receive points, wherein the anchor transmit receive point monitors for scheduling requests from the UE; and

receiving the scheduling request via the anchor transmission reception point.

19. The method of claim 15, wherein the uplink grant is transmitted via a first transmission reception point of the set of transmission reception points in response to the received scheduling request, the method further comprising: transmitting, via a second transmission reception point of the set of transmission reception points, a second uplink grant for the second transmission reception point in response to the received scheduling request.

20. The method of claim 15, wherein the scheduling request is received via a first transmission reception point of the set of transmission reception points and the uplink grant is transmitted via the first transmission reception point in response to the received scheduling request.

21. The method of claim 20, further comprising: determining to refrain from transmitting an uplink grant via a second transmission receiving point of the set of transmission receiving points based at least in part on determining that the base station failed to receive a second scheduling request via the second transmission receiving point.

22. The method of claim 15, wherein receiving the uplink data comprises receiving uplink data via each of a plurality of transmit-receive points, wherein the set of transmit-receive points comprises the plurality of transmit-receive points.

23. The method of claim 15, wherein receiving the uplink data comprises:

identifying that one or more transmitting receiving points of the set of transmitting receiving points have transmitted an uplink grant in response to the received scheduling request; and

receive uplink data from the UE via the one or more transmit receive points based at least in part on the identification.

24. A method for wireless communications at a base station, comprising:

receiving a scheduling request from a User Equipment (UE) operating in a discontinuous reception mode, the scheduling request comprising an indication of a set of antenna sub-arrays or a set of transmit receive points, or a combination thereof, of the UE;

transmitting an uplink grant to the UE in response to the received scheduling request; and

receiving uplink data based at least in part on the transmitted uplink grant and the indication in the received scheduling request.

25. The method of claim 24, wherein receiving the uplink data comprises: receiving uplink data from the UE via a plurality of transmit receive points based at least in part on the transmitted uplink grant and the indication in the received scheduling request, the set of transmit receive points including the plurality of transmit receive points.

26. The method of claim 24, wherein the scheduling request is received via a second transmission-reception point of the set of transmission-reception points, the second transmission-reception point being different from a first transmission-reception point of the set of transmission-reception points used for receiving the uplink data.

27. The method of claim 24, wherein transmitting the uplink grant in response to the received scheduling request comprises: transmitting the uplink grant via at least one of the set of transmission reception points indicated in the received scheduling request.

28. The method of claim 27, further comprising: determining one of the set of transmission reception points indicated in the received scheduling request, the uplink grant being transmitted via the determined one transmission reception point.

29. The method of claim 27, further comprising: determining a plurality of transmission receiving points of the set of transmission receiving points indicated in the received scheduling request, the uplink grant being transmitted via the determined plurality of transmission receiving points.

30. The method of claim 24, wherein the indicated set of transmit receive points is determined based at least in part on a channel quality associated with each transmit receive point of the set of transmit receive points, or each antenna subarray of the set of antenna subarrays, or a combination thereof.

Background

The following relates generally to wireless communications and, more particularly, to Scheduling Request (SR) operation in connected mode Discontinuous Reception (DRX).

Wireless communication systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be able to support communication with multiple users by sharing the available system resources (e.g., time, frequency, and power). Examples of such multiple-access systems include fourth generation (4G) systems, such as Long Term Evolution (LTE) systems, LTE-advanced (LTE-a) systems, or LTE-a Pro systems, and fifth generation (5G) systems that may be referred to as New Radio (NR) systems. These systems may employ various techniques, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM). A wireless multiple-access communication system may include several base stations or network access nodes, each supporting communication for multiple communication devices simultaneously, which may otherwise be referred to as User Equipment (UE).

In some wireless communication systems, a UE may communicate with a base station according to a Connected Drx (CDRX) mode (including, for example, via one or more Transmission Reception Points (TRPs)), where the UE transitions between a sleep state and an awake state based on the CDRX mode without receiving signaling to initiate the transition. During the awake state, the base station may transmit downlink information to the UE, and the UE may monitor a downlink channel (e.g., for downlink information). Additionally, when the UE detects that uplink information is to be transmitted to the base station, the UE may enter an awake state and transmit an SR to the base station during the awake state to request configuration information to subsequently transmit the uplink information (e.g., in the same awake state or a different awake state). However, the UE may communicate concurrently with multiple TRPs (e.g., multiple TRPs associated with the same base station or with two or more different base stations), which may lead to complexity when the UE determines to which TPR the UE will transmit an SR for an uplink transmission.

SUMMARY

The described technology relates to improved methods, systems, devices and apparatus to support Scheduling Request (SR) operation in connected mode Discontinuous Reception (DRX). In general, the described techniques provide a User Equipment (UE) that uses one or more antenna sub-arrays (which may also be referred to as, e.g., panels or antenna panels) to perform SR operations with one or more corresponding Transmit Receive Points (TRPs). Such SR operations may be performed when a UE is operating in a mode that provides an awake or active state alternating with a dormant or inactive state of the UE, such as in a connected drx (cdrx) mode. In some implementations, a UE may receive, from a base station associated with one or more TRPs, a configuration indicating a set of antenna subarrays, a set of TRPs, or both, of the UE with which the UE is to perform an SR operation. Based on this configuration, the UE may then transmit an SR to one or more TRPs in a set of TRPs using a set of antenna subarrays of the UE, receive an uplink grant from at least one TRP in the set of TRPs based on the SR transmission, and transmit uplink data to the at least one TRP based on receiving the uplink grant.

In some implementations, the set of antenna elements, or the set of TRPs, or both, may be dynamically selected (e.g., by the UE) or semi-statically selected (e.g., selected by one of the TRPs and signaled to the UE with the indicated configuration). Additionally or alternatively, the UE may determine a set of antenna subarrays for SR operation, a set of TRPs, or both, and then transmit an indication of the determined set (e.g., as a preferred configuration) when transmitting the SR. The UE may receive an uplink grant based on the indication transmitted with the SR and transmit uplink data based on the uplink grant (and, in some implementations, the indication).

A method of wireless communication at a UE is described. The method can comprise the following steps: receiving a configuration indicating a set of antenna subarrays, or a set of TRPs, or a combination thereof, of the UE for the UE to communicate with when operating in DRX mode; transmitting an SR based on the received configuration while operating in the DRX mode; receiving an uplink grant in response to the transmitted SR; and transmitting uplink data based on the received uplink grant and the received configuration.

An apparatus for wireless communication at a UE is described. The apparatus may include a processor, a memory in electronic communication with the processor, and instructions stored in the memory. The instructions are executable by the processor to cause the apparatus to: receiving a configuration indicating a set of antenna subarrays, or a set of TRPs, or a combination thereof, of the UE for the UE to communicate with when operating in DRX mode; transmitting an SR based on the received configuration while operating in the DRX mode; receiving an uplink grant in response to the transmitted SR; and transmitting uplink data based on the received uplink grant and the received configuration.

Another apparatus for wireless communication at a UE is described. The apparatus may include means for: receiving a configuration indicating a set of antenna subarrays, or a set of TRPs, or a combination thereof, of the UE for the UE to communicate with when operating in DRX mode; transmitting an SR based on the received configuration while operating in the DRX mode; receiving an uplink grant in response to the transmitted SR; and transmitting uplink data based on the received uplink grant and the received configuration.

A non-transitory computer-readable medium storing code for wireless communication at a UE is described. The code may include instructions executable by a processor for: receiving a configuration indicating a set of antenna subarrays, or a set of TRPs, or a combination thereof, of the UE for the UE to communicate with when operating in DRX mode; transmitting an SR based on the received configuration while operating in the DRX mode; receiving an uplink grant in response to the transmitted SR; and transmitting uplink data based on the received uplink grant and the received configuration.

In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, transmitting the SR may include operations, features, apparatuses, or instructions for: transmitting the SR to a plurality of TRPs using a plurality of antenna subarrays of the UE, wherein the set of TRPs includes the plurality of TRPs and the set of antenna subarrays of the UE includes the plurality of antenna subarrays.

In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, transmitting the SR may include operations, features, apparatuses, or instructions for: the SR is transmitted using a set of antenna sub-arrays indicated by the received configuration, the set of antenna sub-arrays comprising a subset of a set of antenna sub-arrays of the UE.

In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, receiving the configuration may include operations, features, apparatuses, or instructions to: the configuration is received in one or more of Radio Resource Control (RRC) signaling, Downlink Control Information (DCI), or a Media Access Control (MAC) control element (MAC-CE).

Some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein may further include operations, features, apparatuses, or instructions to: selecting, by the UE, at least one antenna sub-array of a set of antenna sub-arrays of the UE for performing one or more of: transmit the SR, receive the uplink grant, or transmit the uplink data.

In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, receiving the uplink grant in response to the transmitted SR may include operations, features, apparatuses, or instructions to: receiving an uplink grant for a first TRP of the set of TRPs in response to the transmitted SR; and receiving an uplink grant for a second TRP in the set of TRPs in response to the transmitted SR.

In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the set of TRPs may include operations, features, apparatuses, or instructions for: an uplink grant is received for each TRP in the set of TRPs in response to the transmitted SR.

In some examples of methods, apparatuses (devices), and non-transitory computer-readable media described herein, the SR may be transmitted to a first TRP of the set of TRPs, and an uplink grant may be received from the first TRP in response to the transmitted SR.

In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the set of TRPs may include operations, features, apparatuses, or instructions for: transmitting uplink data to each TRP in the set of TRPs.

In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, transmitting the uplink data may include operations, features, apparatuses, or instructions for: identifying that one or more TRPs of the set of TRPs have transmitted an uplink grant in response to the transmitted SR, and transmitting uplink data to the one or more TRPs based on the identification.

In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, an SR may be transmitted on an uplink control channel, an uplink grant may be received on a downlink control channel, and uplink data may be transmitted on an uplink shared channel.

A method of wireless communication at a UE is described. The method can comprise the following steps: transmitting an SR when operating in DRX mode, the SR comprising an indication of a set of antenna subarrays, or a set of TRPs, or a combination thereof, of the UE; receiving an uplink grant in response to the transmitted SR; and transmitting uplink data based on the received uplink grant and the indication in the transmitted SR.

An apparatus for wireless communication at a UE is described. The apparatus may include a processor, a memory in electronic communication with the processor, and instructions stored in the memory. The instructions are executable by the processor to cause the apparatus to: transmitting an SR when operating in DRX mode, the SR comprising an indication of a set of antenna subarrays, or a set of TRPs, or a combination thereof, of the UE; receiving an uplink grant in response to the transmitted SR; and transmitting uplink data based on the received uplink grant and the indication in the transmitted SR.

Another apparatus for wireless communication at a UE is described. The apparatus may include means for: transmitting an SR when operating in DRX mode, the SR comprising an indication of a set of antenna subarrays, or a set of TRPs, or a combination thereof, of the UE; receiving an uplink grant in response to the transmitted SR; and transmitting uplink data based on the received uplink grant and the indication in the transmitted SR.

A non-transitory computer-readable medium storing code for wireless communication at a UE is described. The code may include instructions executable by a processor for: transmitting an SR when operating in DRX mode, the SR comprising an indication of a set of antenna subarrays, or a set of TRPs, or a combination thereof, of the UE; receiving an uplink grant in response to the transmitted SR; and transmitting uplink data based on the received uplink grant and the indication in the transmitted SR.

In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the set of TRPs may include operations, features, apparatuses, or instructions for: transmitting uplink data to the set of TRPs based on the received uplink grant and the indication in the transmitted SR.

In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, transmitting the uplink data to the set of TRPs may include operations, features, means, or instructions for: transmitting the uplink data to the set of TRPs using a plurality of antenna sub-arrays of the UE, the set of antenna sub-arrays including the plurality of antenna sub-arrays.

In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the SR may be transmitted using a second antenna subarray of the set of antenna subarrays of the UE that is different from a first antenna subarray of the set of antenna subarrays used to transmit the uplink data.

In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, receiving the uplink grant in response to the transmitted SR may include operations, features, apparatuses, or instructions to: the uplink grant is received using a set of antenna sub-arrays of the UE indicated in the transmitted SR.

In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the set of antenna sub-arrays may include a second antenna sub-array that is different from a first antenna sub-array of the set of antenna sub-arrays used to transmit uplink data.

In some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein, the set of antenna sub-arrays may include a set of antenna sub-arrays.

Some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein may further include operations, features, apparatuses, or instructions to: the method may include determining a channel quality associated with each TRP in the set of TRPs, and determining the set of TRPs based on the determined channel quality, wherein the transmitted SR indicates the determined set of TRPs.

Some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein may further include operations, features, apparatuses, or instructions to: a channel quality associated with each antenna subarray in a set of antenna subarrays of the UE is determined, and the set of antenna subarrays is determined based on the determined channel quality, wherein the transmitted SR indicates the determined set of antenna subarrays.

In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, an SR may be transmitted on an uplink control channel, an uplink grant may be received on a downlink control channel, and uplink data may be transmitted on an uplink shared channel.

A method of wireless communication at a base station is described. The method can comprise the following steps: transmitting, to a UE, a configuration indicating a set of antenna subarrays, or a set of TRPs, or a combination thereof, of the UE for the UE to use to communicate when operating in DRX mode; receiving an SR from the UE based on the transmitted configuration; transmitting an uplink grant to the UE in response to the received SR; and receiving uplink data from the UE based on the transmitted uplink grant.

An apparatus for wireless communication at a base station is described. The apparatus may include a processor, a memory in electronic communication with the processor, and instructions stored in the memory. The instructions are executable by the processor to cause the apparatus to: transmitting, to a UE, a configuration indicating a set of antenna subarrays, or a set of TRPs, or a combination thereof, of the UE for the UE to use to communicate when operating in DRX mode; receiving an SR from the UE based on the transmitted configuration; transmitting an uplink grant to the UE in response to the received SR; and receiving uplink data from the UE based on the transmitted uplink grant.

Another apparatus for wireless communication at a base station is described. The apparatus may include means for: transmitting, to a UE, a configuration indicating a set of antenna subarrays, or a set of TRPs, or a combination thereof, of the UE for the UE to use to communicate when operating in DRX mode; receiving an SR from the UE based on the transmitted configuration; transmitting an uplink grant to the UE in response to the received SR; and receiving uplink data from the UE based on the transmitted uplink grant.

A non-transitory computer-readable medium storing code for wireless communication at a base station is described. The code may include instructions executable by a processor for: transmitting, to a UE, a configuration indicating a set of antenna subarrays, or a set of TRPs, or a combination thereof, of the UE for the UE to use to communicate when operating in DRX mode; receiving an SR from the UE based on the transmitted configuration; transmitting an uplink grant to the UE in response to the received SR; and receiving uplink data from the UE based on the transmitted uplink grant.

In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, receiving the SR may include operations, features, apparatuses, or instructions to: the SR is received via a plurality of TRPs, wherein each TRP in the set of TRPs monitors the SR from the UE.

In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, receiving the SR may include operations, features, apparatuses, or instructions to: the SR is received via one of the set of TRPs, wherein each TRP in the set of TRPs monitors the SR from the UE.

In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, receiving the SR may include operations, features, apparatuses, or instructions to: an anchor TRP in the set of TRPs is identified, wherein the anchor TRP monitors the SR from the UE and receives the SR via the anchor TRP.

In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, communicating the configuration may include operations, features, apparatuses, or instructions for: the configuration is transmitted in one or more of RRC signaling, DCI, or MAC CE.

Some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein may further include operations, features, apparatuses, or instructions to: transmitting an uplink grant for a second TRP of the set of TRPs via the second TRP in response to the received SR.

In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the SR may be received via a first TRP of the set of TRPs, and the uplink grant may be transmitted via the first TRP in response to the received SR.

Some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein may further include operations, features, apparatuses, or instructions to: determining to refrain from transmitting an uplink grant via a second TRP based on determining that the base station fails to receive a second SR via a second TRP of the set of TRPs.

In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, receiving the uplink data may include operations, features, apparatuses, or instructions for: receiving uplink data via each of a plurality of TRPs, wherein the set of TRPs includes the plurality of TRPs.

In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, receiving the uplink data may include operations, features, apparatuses, or instructions for: identifying that one or more TRPs of the set of TRPs have transmitted an uplink grant in response to the received SR, and receiving uplink data from the UE via the one or more TRPs based on the identifying.

In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, an SR may be received on an uplink control channel, an uplink grant may be transmitted on a downlink control channel, and uplink data may be received on an uplink shared channel.

A method of wireless communication at a base station is described. The method can comprise the following steps: receiving an SR from a UE operating in DRX mode, the SR comprising an indication of a set of antenna subarrays, or a set of TRPs, or a combination thereof, of the UE; transmitting an uplink grant to the UE in response to the received SR; and receiving uplink data based on the transmitted uplink grant and the indication in the received SR.

An apparatus for wireless communication at a base station is described. The apparatus may include a processor, a memory in electronic communication with the processor, and instructions stored in the memory. The instructions are executable by the processor to cause the apparatus to: receiving an SR from a UE operating in DRX mode, the SR comprising an indication of a set of antenna subarrays, or a set of TRPs, or a combination thereof, of the UE; transmitting an uplink grant to the UE in response to the received SR; and receiving uplink data based on the transmitted uplink grant and the indication in the received SR.

Another apparatus for wireless communication at a base station is described. The apparatus may include means for: receiving an SR from a UE operating in DRX mode, the SR comprising an indication of a set of antenna subarrays, or a set of TRPs, or a combination thereof, of the UE; transmitting an uplink grant to the UE in response to the received SR; and receiving uplink data based on the transmitted uplink grant and the indication in the received SR.

A non-transitory computer-readable medium storing code for wireless communication at a base station is described. The code may include instructions executable by a processor for: receiving an SR from a UE operating in DRX mode, the SR comprising an indication of a set of antenna subarrays, or a set of TRPs, or a combination thereof, of the UE; transmitting an uplink grant to the UE in response to the received SR; and receiving uplink data based on the transmitted uplink grant and the indication in the received SR.

In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, receiving the uplink data may include operations, features, apparatuses, or instructions for: receive uplink data from the UE via a plurality of TRPs based on the transmitted uplink grant and the indication in the received SR, the set of TRPs including the plurality of TRPs.

In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the SR may be received via a second TRP of the set of TRPs that is different from a first TRP of the set of TRPs used to receive uplink data.

In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, transmitting the uplink grant in response to the received SR may include operations, features, apparatuses, or instructions to: transmitting the uplink grant via at least one TRP of the set of TRPs indicated in the received SR.

Some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein may further include operations, features, apparatuses, or instructions to: determining one TRP of the set of TRPs indicated in the received SR, wherein the uplink grant is transmitted via the determined one TRP.

Some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein may further include operations, features, apparatuses, or instructions to: determining a plurality of TRPs in the set of TRPs indicated in the received SR, wherein the uplink grant is transmitted via the determined plurality of TRPs.

In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the indicated set of TRPs may be determined based on channel qualities associated with one or more of: each TRP in the set of TRPs, or each antenna subarray in the set of antenna subarrays.

In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the indicated set of antenna sub-arrays may be determined based on channel qualities associated with one or more of: each TRP in the set of TRPs, or each antenna subarray in the set of antenna subarrays.

In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, an SR may be received on an uplink control channel, an uplink grant may be transmitted on a downlink control channel, and uplink data may be received on an uplink shared channel.

Brief Description of Drawings

Fig. 1 illustrates an example of a wireless communication system that supports Scheduling Request (SR) operation in connected mode Discontinuous Reception (DRX) in accordance with aspects of the present disclosure.

Fig. 2 illustrates an example of a wireless communication system that supports SR operation in a connected drx (cdrx) mode, in accordance with aspects of the present disclosure.

Fig. 3, 4, and 5 illustrate examples of SR operation in CDRX mode according to aspects of the present disclosure.

Fig. 6 and 7 illustrate examples of process flows to support SR operation in CDRX mode according to aspects of the present disclosure.

Fig. 8 and 9 show block diagrams of devices that support SR operation in CDRX mode, according to aspects of the present disclosure.

Fig. 10 illustrates a block diagram of a UE communications manager supporting SR operation in CDRX mode, in accordance with aspects of the present disclosure.

Fig. 11 shows a diagram of a system including devices that support SR operation in CDRX mode, according to aspects of the present disclosure.

Fig. 12 and 13 show block diagrams of devices that support SR operation in CDRX mode, according to aspects of the present disclosure.

Fig. 14 illustrates a block diagram of a base station communications manager that supports SR operation in CDRX mode, in accordance with aspects of the present disclosure.

Fig. 15 shows a diagram of a system including devices that support SR operation in CDRX mode, according to aspects of the present disclosure.

Fig. 16 to 20 show flowcharts of methods of supporting SR operation in CDRX mode according to aspects of the present disclosure.

Detailed Description

In some wireless communication systems, a User Equipment (UE) may communicate concurrently with one or more Transmit Receive Points (TRPs) (e.g., TRPs associated with the same base station or with two or more different base stations) via one or more antenna sub-arrays (also referred to as, e.g., panels or antenna panels) according to a mode that provides alternating awake (or active) and sleep (or inactive) states, such as a connected mode of a Discontinuous Reception (DRX) cycle. In some implementations, a UE may use individual antenna sub-arrays (i.e., a set of antennas used for, for example, beamforming, transmit diversity, receive diversity, or multiple-input multiple-output (MIMO) communication) for communication with a TRP based on, for example, the corresponding orientation of the antenna sub-arrays or the physical location of the antenna sub-arrays on the UE. In connected DRX (cdrx) mode (e.g., connected mode of DRX cycle), the UE may make a signal-free transition between sleep and awake states (i.e., without signaling from one of these TRPs to wake up the UE). During the awake state, one or more of the TRPs may transmit downlink information (such as control or data) on one or more downlink channels to the UE, and the UE may accordingly monitor the downlink channels for incoming downlink information from the TRPs (e.g., using corresponding antenna sub-arrays associated with the TRP).

Additionally or alternatively, if the UE detects that the UE has uplink information (such as data) to transmit, the UE may perform a Scheduling Request (SR) operation to request resources and configuration information for subsequently transmitting the uplink data. For example, the SR operation may include the UE transmitting an SR to one of the TRPs via an uplink channel, the TRP transmitting an uplink grant to the UE via a downlink channel, and the UE transmitting uplink data on resources as indicated in the uplink grant via the uplink channel. However, as described above, the UE may concurrently communicate with a plurality of TRPs, which may complicate the SR operation based on the UE not knowing which TRP to perform the SR operation with.

As described herein, a first TRP (i.e., any one of one or more TRPs to which a UE has connected) may convey configuration information regarding: which antenna sub-arrays to use when transmitting the SR, with which TRPs to perform future SR operations (e.g., which TRPs will transmit uplink grants), and which antenna sub-arrays to use when transmitting uplink data for the SR, or a combination thereof. In some implementations, the configuration information may include an indication of resources used for SR transmission for SR operations, used for receiving uplink grants, used for transmitting uplink grants, or a combination thereof.

Based on the configuration information, the UE may transmit the SR to a respective TRP using each antenna sub-array, transmit the SR using a subset of the UE's antenna sub-arrays, or transmit the SR to a corresponding TRP using one antenna sub-array. In some implementations, the one sub-array may be dynamically selected (e.g., selected by a base station or TRP-which signals the selection via Downlink Control Information (DCI) or Media Access Control (MAC) control element (MAC-CE), or selected by a UE) or semi-statically selected (e.g., selected by a base station or TRP-which signals the selection via Radio Resource Control (RRC) signaling). The respective TRP or corresponding TRP may then transmit an uplink grant to the UE based on receiving the SR. That is, if the UE transmits SRs to respective TRPs using each antenna sub-array, each of these TRPs may transmit a separate uplink grant, and if the UE transmits one SR, the corresponding TRP receiving the SR may transmit an uplink grant to the UE. Additionally, the UE may then transmit uplink data using the antenna sub-array on which the UE transmitted the SR and the antenna sub-array from which the uplink grant was received.

In other implementations, the UE may autonomously determine one or more TRP-antenna subarray pairs for transmitting uplink data and transmit an indication of the determined TRP-antenna subarray pairs with the SR. For example, the UE may transmit the indication to a first TRP, receive an uplink grant from the first TRP, or from the TRP indicated in the TRP-antenna subarray pair, and transmit uplink data to the TRP determined in the TRP-antenna subarray pair.

Aspects of the present disclosure are initially described in the context of a wireless communication system. Additionally, aspects of the present disclosure are illustrated by additional wireless communication systems, examples of SR operations, and process flow examples. Aspects of the present disclosure are further illustrated and described by and with reference to apparatus diagrams, system diagrams, and flow diagrams related to SR operation in connected mode DRX.

Fig. 1 illustrates an example of a wireless communication system 100 that supports SR operation in CDRX mode, in accordance with aspects of the present disclosure. The wireless communication system 100 includes base stations 105, UEs 115, and a core network 130. In some examples, the wireless communication system 100 may be a Long Term Evolution (LTE) network, an LTE-advanced (LTE-a) network, an LTE-a Pro network, or a New Radio (NR) network. In some implementations, the wireless communication system 100 may support enhanced broadband communications, ultra-reliable (e.g., mission critical) communications, low latency communications, or communications with low cost and low complexity devices.

The base station 105 may communicate wirelessly with the UE115 via one or more base station antennas. The base stations 105 described herein may include or may be referred to by those skilled in the art as base transceiver stations, radio base stations, access points, radio transceivers, node bs, evolved node bs (enbs), next generation node bs or gigabit node bs (any of which may be referred to as gnbs), home node bs, home evolved node bs, or some other suitable terminology. The wireless communication system 100 may include different types of base stations 105 (e.g., macro base stations or small cell base stations). The UEs 115 described herein may be capable of communicating with various types of base stations 105 and network equipment, including macro enbs, small cell enbs, gbbs, relay base stations, and so forth.

Each base station 105 may be associated with a particular geographic coverage area 110, supporting communication with various UEs 115 in that particular geographic coverage area 110. Each base station 105 may provide communication coverage for a respective geographic coverage area 110 via a communication link 125, and the communication link 125 between the base station 105 and the UE115 may utilize one or more carriers. The communication links 125 shown in the wireless communication system 100 may include uplink transmissions from the UEs 115 to the base stations 105 or downlink transmissions from the base stations 105 to the UEs 115. Downlink transmissions may also be referred to as forward link transmissions, and uplink transmissions may also be referred to as reverse link transmissions.

The geographic coverage area 110 of a base station 105 can be divided into sectors that form a portion of the geographic coverage area 110, and each sector can be associated with a cell. For example, each base station 105 may provide communication coverage for a macro cell, a small cell, a hot spot, or other type of cell, or various combinations thereof. In some examples, the base stations 105 may be mobile and thus provide communication coverage for a moving geographic coverage area 110. In some examples, different geographic coverage areas 110 associated with different technologies may overlap, and the overlapping geographic coverage areas 110 associated with different technologies may be supported by the same base station 105 or different base stations 105. The wireless communication system 100 may include, for example, a heterogeneous LTE/LTE-A/LTE-A Pro or NR network in which different types of base stations 105 provide coverage for various geographic coverage areas 110.

The term "cell" refers to a logical communication entity for communicating with a base station 105 (e.g., on a carrier) and may be associated with an identifier to distinguish between neighboring cells (e.g., Physical Cell Identifier (PCID), Virtual Cell Identifier (VCID)) operating via the same or different carriers. In some examples, a carrier may support multiple cells, and different cells may be configured according to different protocol types (e.g., Machine Type Communication (MTC), narrowband internet of things (NB-IoT), enhanced mobile broadband (eMBB), or other protocol types) that may provide access for different types of devices. In some implementations, the term "cell" may refer to a portion (e.g., a sector) of the geographic coverage area 110 over which a logical entity operates.

The UEs 115 may be dispersed throughout the wireless communication system 100, and each UE115 may be stationary or mobile. A UE115 may also be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable terminology, where a "device" may also be referred to as a unit, station, terminal, or client. The UE115 may be a personal electronic device, such as a cellular telephone, a Personal Digital Assistant (PDA), a tablet computer, a laptop computer, or a personal computer. In some examples, the UE115 may also refer to a Wireless Local Loop (WLL) station, an internet of things (IoT) device, an internet of everything (IoE) device, or an MTC device, among others, which may be implemented in various items such as appliances, vehicles, meters, and so forth.

Some UEs 115, such as MTC or IoT devices, may be low cost or low complexity devices and may provide automated communication between machines (e.g., communication via machine-to-machine (M2M)). M2M communication or MTC may refer to data communication techniques that allow devices to communicate with each other or with the base station 105 without human intervention. In some examples, M2M communications or MTC may include communications from devices that integrate sensors or meters to measure or capture information and relay the information to a central server or application that may utilize the information or present the information to a person interacting with the program or application. Some UEs 115 may be designed to collect information or implement automated behavior of a machine. Examples of applications for MTC devices include: smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, field survival monitoring, weather and geographic event monitoring, queue management and tracking, remote security sensing, physical access control, and transaction-based business charging.

Some UEs 115 may be configured to employ a reduced power consumption mode of operation, such as half-duplex communications (e.g., a mode that supports unidirectional communication via transmission or reception but does not simultaneously transmit and receive). In some examples, half-duplex communication may be performed with a reduced peak rate. Other power saving techniques for the UE115 include: enter a power-saving "deep sleep" mode when not engaged in active communication, or operate over a limited bandwidth (e.g., according to narrowband communication). In some implementations, the UE115 may be designed to support critical functions (e.g., mission critical functions), and the wireless communication system 100 may be configured to provide ultra-reliable communication for these functions.

In some implementations, the UE115 may also be able to communicate directly with other UEs 115 (e.g., using peer-to-peer (P2P) or device-to-device (D2D) protocols). One or more UEs of the group of UEs 115 communicating with D2D may be within the geographic coverage area 110 of the base station 105. Other UEs 115 in such groups may be outside the geographic coverage area 110 of the base station 105 or otherwise unable to receive transmissions from the base station 105. In some implementations, groups of UEs 115 communicating via D2D communication may utilize a one-to-many (1: M) system, where each UE115 transmits to every other UE115 in the group. In some implementations, the base station 105 facilitates scheduling of resources for D2D communication. In other implementations, D2D communication is performed between UEs 115 without involving base stations 105.

The base stations 105 may communicate with the core network 130 and with each other. For example, the base stations 105 may interface with the core network 130 over backhaul links 132 (e.g., via S1, N2, N3, or other interfaces). The base stations 105 may communicate with each other over backhaul links 134 (e.g., via X2, Xn, or other interfaces) directly (e.g., directly between base stations 105) or indirectly (e.g., via the core network 130).

The core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network 130 may be an Evolved Packet Core (EPC) that may include at least one Mobility Management Entity (MME), at least one serving gateway (S-GW), and at least one Packet Data Network (PDN) gateway (P-GW). The MME may manage non-access stratum (e.g., control plane) functions such as mobility, authentication, and bearer management for UEs 115 served by base stations 105 associated with the EPC. User IP packets may be communicated through the S-GW, which may itself be connected to the P-GW. The P-GW may provide IP address allocation as well as other functions. The P-GW may be connected to network operator IP services. The operator IP services may include access to the internet, intranets, IP Multimedia Subsystem (IMS), or Packet Switched (PS) streaming services.

At least some network devices, such as base stations 105, may include subcomponents, such as access network entities, which may be examples of Access Node Controllers (ANCs). Each access network entity may communicate with UEs 115 through a number of other access network transport entities, which may be referred to as radio heads, intelligent radio heads, or TRPs. In some configurations, the various functions of each access network entity or base station 105 may be distributed across various network devices (e.g., radio heads and access network controllers) or consolidated into a single network device (e.g., base station 105).

Wireless communication system 100 may operate using one or more frequency bands, typically in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). Generally, the 300MHz to 3GHz region is referred to as an Ultra High Frequency (UHF) region or a decimeter band because the wavelengths range from about 1 decimeter to 1 meter long. UHF waves can be blocked or redirected by building and environmental features. However, these waves may penetrate a variety of structures sufficiently for a macro cell to provide service to a UE115 located indoors. UHF-wave transmission can be associated with smaller antennas and shorter ranges (e.g., less than 100km) than transmission using smaller and longer waves of the High Frequency (HF) or Very High Frequency (VHF) portions of the spectrum below 300 MHz.

The wireless communication system 100 may also operate in the ultra-high frequency (SHF) region using a frequency band from 3GHz to 30GHz, also referred to as a centimeter frequency band. The SHF region includes frequency bands (such as the 5GHz industrial, scientific, and medical (ISM) frequency bands) that may be opportunistically used by devices that may be able to tolerate interference from other users.

The wireless communication system 100 may also operate in the Extremely High Frequency (EHF) region of the spectrum (e.g., from 30GHz to 300GHz), which is also referred to as the millimeter-band. In some examples, the wireless communication system 100 may support millimeter wave (mmW) communication between the UE115 and the base station 105, and EHF antennas of respective devices may be even smaller and more closely spaced than UHF antennas. In some implementations, this may facilitate the use of antenna arrays within the UE 115. However, propagation of EHF transmissions may experience even greater atmospheric attenuation and shorter ranges than SHF or UHF transmissions. The techniques disclosed herein may be employed across transmissions using one or more different frequency regions, and the frequency band usage designated across these frequency regions may differ by country or regulatory agency.

In some implementations, the wireless communication system 100 may utilize both licensed and unlicensed radio frequency spectrum bands. For example, the wireless communication system 100 may employ Licensed Assisted Access (LAA), LTE unlicensed (LTE-U) radio access technology, or NR technology in an unlicensed band, such as the 5GHz ISM band. When operating in the unlicensed radio frequency spectrum band, wireless devices, such as base stations 105 and UEs 115, may employ a Listen Before Talk (LBT) procedure to ensure that frequency channels are clear before transmitting data. In some implementations, operation in the unlicensed band may be based on a carrier aggregation configuration (e.g., LAA) in cooperation with component carriers operating in the licensed band. Operations in the unlicensed spectrum may include downlink transmissions, uplink transmissions, peer-to-peer transmissions, or a combination of these transmissions. Duplexing in the unlicensed spectrum may be based on Frequency Division Duplexing (FDD), Time Division Duplexing (TDD), or a combination of both.

In some examples, a base station 105 or UE115 may be equipped with multiple antennas, which may be used to employ techniques such as transmit diversity, receive diversity, MIMO communication, or beamforming. For example, the wireless communication system 100 may use a transmission scheme between a transmitting device (e.g., base station 105) equipped with multiple antennas and a receiving device (e.g., UE115) equipped with one or more antennas. MIMO communication may employ multipath signal propagation to increase spectral efficiency by transmitting or receiving multiple signals via different spatial layers, which may be referred to as spatial multiplexing. For example, a transmitting device may transmit multiple signals via different antennas or different combinations of antennas. Also, the receiving device may receive multiple signals via different antennas or different combinations of antennas. Each of the multiple signals may be referred to as a separate spatial stream and may carry bits associated with the same data stream (e.g., the same codeword) or different data streams. Different spatial layers may be associated with different antenna ports for channel measurement and reporting. MIMO techniques include single-user MIMO (SU-MIMO), in which multiple spatial layers are transmitted to the same receiver device; and multi-user MIMO (MU-MIMO), in which a plurality of spatial layers are transmitted to a plurality of devices.

Beamforming, which may also be referred to as spatial filtering, directional transmission, or directional reception, is a signal processing technique that may be used at a transmitting device or a receiving device (e.g., base station 105 or UE115) to shape or steer an antenna beam (e.g., a transmit beam or a receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming may be achieved by combining signals communicated via antenna elements of an antenna array such that signals propagating in a particular orientation relative to the antenna array undergo constructive interference while other signals undergo destructive interference. The adjustment to the signals communicated via the antenna elements may include the transmitting or receiving device applying a particular amplitude and phase shift to the signals carried via each antenna element associated with the device. The adjustment associated with each antenna element may be defined by a set of beamforming weights associated with a particular orientation (e.g., relative to an antenna array of a transmitting device or a receiving device, or relative to some other orientation).

In one example, the base station 105 may use multiple antennas or antenna arrays for beamforming operations for directional communication with the UEs 115. For example, some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) may be transmitted multiple times in different directions by the base station 105, which may include a signal being transmitted according to different sets of beamforming weights associated with different transmission directions. Transmissions in different beam directions may be used (e.g., by the base station 105 or a receiving device, such as UE115) to identify beam directions used by the base station 105 for subsequent transmissions/receptions.

Some signals, such as data signals associated with a particular recipient device, may be transmitted by the base station 105 in a single beam direction (e.g., a direction associated with the recipient device, such as the UE 115). In some examples, a beam direction associated with transmission along a single beam direction may be determined based at least in part on signals transmitted in different beam directions. For example, the UE115 may receive one or more signals transmitted by the base station 105 in different directions, and the UE115 may report an indication to the base station 105 of the signal for which it is received at the highest signal quality or other acceptable signal quality. Although the techniques are described with reference to signals transmitted by the base station 105 in one or more directions, the UE115 may use similar techniques for transmitting signals multiple times in different directions (e.g., for identifying beam directions used by the UE115 for subsequent transmission or reception), or for transmitting signals in a single direction (e.g., for transmitting data to a receiving device).

A receiving device (e.g., UE115, which may be an example of a mmW receiving device) may attempt multiple receive beams when receiving various signals from base station 105, such as synchronization signals, reference signals, beam selection signals, or other control signals. For example, a recipient device may attempt multiple receive directions by: receiving via different antenna sub-arrays, processing received signals according to different antenna sub-arrays, receiving according to different sets of receive beamforming weights applied to signals received at multiple antenna elements of an antenna array, or processing received signals according to different sets of receive beamforming weights applied to signals received at multiple antenna elements of an antenna array, either of which may be referred to as "listening" according to different receive beams or receive directions. In some examples, the receiving device may use a single receive beam to receive along a single beam direction (e.g., when receiving a data signal). The single receive beam may be aligned in a beam direction determined based at least in part on listening from different receive beam directions (e.g., a beam direction determined to have the highest signal strength, highest signal-to-noise ratio, or other acceptable signal quality based at least in part on listening from multiple beam directions).

In some implementations, the antennas of the base station 105 or the UE115 may be located within one or more antenna arrays that may support MIMO operation or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly (such as an antenna tower). In some implementations, antennas or antenna arrays associated with the base station 105 may be located at different geographic locations. The base station 105 may have an antenna array with a number of rows and columns of antenna ports that the base station 105 may use to support beamforming for communications with the UEs 115. Likewise, the UE115 may have one or more antenna arrays that may support various MIMO or beamforming operations.

In some implementations, the wireless communication system 100 may be a packet-based network operating according to a layered protocol stack. In the user plane, communication of the bearer or Packet Data Convergence Protocol (PDCP) layer may be IP-based. The Radio Link Control (RLC) layer may perform packet segmentation and reassembly to communicate on logical channels. The MAC layer may perform priority setting and multiplexing of logical channels into transport channels. The MAC layer may also use hybrid automatic repeat request (HARQ) to provide retransmission by the MAC layer, thereby improving link efficiency. In the control plane, the RRC protocol layer may provide for establishment, configuration, and maintenance of RRC connections of radio bearers supporting user plane data between the UE115 and the base station 105 or core network 130. At the physical layer (PHY), transport channels may be mapped to physical channels.

In some implementations, the UE115 and the base station 105 may support retransmission of data to increase the likelihood that the data is successfully received. HARQ feedback is a technique that increases the likelihood that data will be correctly received on the communication link 125. HARQ may include a combination of error detection (e.g., using Cyclic Redundancy Check (CRC)), Forward Error Correction (FEC), and retransmission (e.g., automatic repeat request (ARQ)). HARQ may improve throughput of the MAC layer in poor radio conditions (e.g., signal-to-noise conditions). In some implementations, a wireless device may support simultaneous slot HARQ feedback, where the device may provide HARQ feedback in a particular slot for data received in a previous symbol in the slot. In other implementations, the device may provide HARQ feedback in subsequent time slots or according to some other time interval.

The time interval in LTE or NR may be in a basic unit of time (which may for example refer to the sampling period T)_s1/30,720,000 seconds). The time intervals of the communication resources may be organized according to radio frames each having a duration of 10 milliseconds (ms), where the frame period may be expressed as T_f＝307,200T_s. The radio frame may be identified by a System Frame Number (SFN) ranging from 0 to 1023. Each frame may include 10 subframes numbered from 0 to 9, and each subframe may have a duration of 1 ms. A subframe may be further divided into 2 slots, each having a duration of 0.5ms, and each slot may contain 6 or 7 modulation symbol periods (e.g., depending on the length of the cyclic prefix preceding each symbol period). Each symbol period may contain 2048 sample periods, excluding the cyclic prefix. In some implementations, a subframe may be the smallest scheduling unit of the wireless communication system 100 and may be referred to as a Transmission Time Interval (TTI). In other implementations, the minimum scheduling unit of the wireless communication system 100 may be shorter than a subframe or may be dynamically selected (e.g., in a burst of shortened tti (sTTI) or in a selected component carrier using sTTI).

In some wireless communication systems, a slot may be further divided into a plurality of mini-slots containing one or more symbols. In some examples, a symbol of a mini-slot or a mini-slot may be a minimum scheduling unit. For example, each symbol may vary in duration depending on the subcarrier spacing or operating frequency band. Further, some wireless communication systems may implement timeslot aggregation, where multiple timeslots or mini-timeslots are aggregated together and used for communication between the UE115 and the base station 105.

The term "carrier" refers to a set of radio frequency spectrum resources having a defined physical layer structure for supporting communications over the communication link 125. For example, the carrier of the communication link 125 may comprise a portion of a radio frequency spectrum band operating according to a physical layer channel for a given radio access technology. Each physical layer channel may carry user data, control information, or other signaling. The carriers may be associated with predefined frequency channels (e.g., evolved universal mobile telecommunications system terrestrial radio access (E-UTRA) absolute radio frequency channel numbers (EARFCNs)) and may be located according to a channel grid for discovery by UEs 115. The carriers may be downlink or uplink (e.g., in FDD mode), or configured to carry downlink and uplink communications (e.g., in TDD mode). In some examples, a signal waveform transmitted on a carrier may include multiple subcarriers (e.g., using multicarrier modulation (MCM) techniques such as Orthogonal Frequency Division Multiplexing (OFDM) or discrete fourier transform spread OFDM (DFT-S-OFDM)).

The organization of the carriers may be different for different radio access technologies (e.g., LTE-A, LTE-A Pro, NR). For example, communications on a carrier may be organized according to TTIs or slots, each of which may include user data as well as control information or signaling supporting decoding of the user data. The carrier may also include dedicated acquisition signaling (e.g., synchronization signals or system information) and control signaling to coordinate carrier operation. In some examples (e.g., in a carrier aggregation configuration), a carrier may also have acquisition signaling or control signaling that coordinates the operation of other carriers.

The physical channels may be multiplexed on the carriers according to various techniques. The physical control channels and physical data channels may be multiplexed on the downlink carrier using, for example, Time Division Multiplexing (TDM) techniques, Frequency Division Multiplexing (FDM) techniques, or hybrid TDM-FDM techniques. In some examples, control information transmitted in the physical control channel may be distributed in a cascaded manner between different control regions (e.g., between a common control region or common search space and one or more UE-specific control regions or UE-specific search spaces).

A carrier may be associated with a particular bandwidth of the radio frequency spectrum, and in some examples, the carrier bandwidth may be referred to as a carrier or "system bandwidth" of the wireless communication system 100. For example, the carrier bandwidth may be one of several predetermined bandwidths (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80MHz) of the carrier of the particular radio access technology. In some examples, each served UE115 may be configured to operate over part or all of the carrier bandwidth. In other examples, some UEs 115 may be configured for operation using a narrowband protocol type associated with a predefined portion or range within a carrier (e.g., a set of subcarriers or RBs) (e.g., "in-band" deployment of narrowband protocol types).

In a system employing MCM technology, a resource element may include one symbol period (e.g., the duration of one modulation symbol) and one subcarrier, where the symbol period and subcarrier spacing are inversely related. The number of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme). Thus, the more resource elements the UE115 receives and the higher the order of the modulation scheme, the higher the data rate of the UE115 may be. In a MIMO system, wireless communication resources may refer to a combination of radio frequency spectrum resources, time resources, and spatial resources (e.g., spatial layers), and using multiple spatial layers may further improve the data rate of communication with the UE 115.

Devices of the wireless communication system 100 (e.g., base stations 105 or UEs 115) may have a hardware configuration that supports communication over a particular carrier bandwidth or may be configurable to support communication over one carrier bandwidth of a set of carrier bandwidths. In some examples, the wireless communication system 100 may include base stations 105, UEs 115, or a combination thereof that support simultaneous communication via carriers associated with more than one different carrier bandwidth.

The wireless communication system 100 may support communication with UEs 115 over multiple cells or carriers, a feature that may be referred to as carrier aggregation or multi-carrier operation. The UE115 may be configured with multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration. Carrier aggregation may be used with both FDD and TDD component carriers.

In some implementations, the wireless communication system 100 may utilize an enhanced component carrier (eCC). An eCC may be characterized by one or more characteristics including a wider carrier or frequency channel bandwidth, a shorter symbol duration, a shorter TTI duration, or a modified control channel configuration. In some implementations, an eCC may be associated with a carrier aggregation configuration or a dual connectivity configuration (e.g., when multiple serving cells have suboptimal or non-ideal backhaul links). An eCC may also be configured for use in unlicensed spectrum or shared spectrum (e.g., where more than one operator is allowed to use the spectrum). An eCC characterized by a wide carrier bandwidth may include one or more segments that may be utilized by UEs 115 that are unable to monitor the entire carrier bandwidth or are otherwise configured to use a limited carrier bandwidth (e.g., to conserve power).

In some implementations, the eCC may utilize a different symbol duration than other component carriers, which may include using a reduced symbol duration compared to the symbol durations of the other component carriers. Shorter symbol durations may be associated with increased spacing between adjacent subcarriers. Devices utilizing an eCC, such as UE115 or base station 105, may transmit a wideband signal (e.g., according to a frequency channel or carrier bandwidth of 20, 40, 60, or 80MHz) with a reduced symbol duration (e.g., 16.67 microseconds). A TTI in an eCC may include one or more symbol periods. In some implementations, the TTI duration (i.e., the number of symbol periods in a TTI) may be variable.

The wireless communication system 100 may be an NR system that may utilize any combination of licensed, shared, and unlicensed spectrum bands, etc. Flexibility in eCC symbol duration and subcarrier spacing may allow eCC to be used across multiple spectra. In some examples, NR sharing spectrum may improve spectrum utilization and spectral efficiency, particularly through dynamic vertical (e.g., across frequency domains) and horizontal (e.g., across time domains) sharing of resources.

To conserve battery power, the UE115 may utilize a DRX cycle when communicating with the base station 105 that includes periodic turning on and off of the receiver, e.g., in alternating active and inactive states. The DRX cycle may be configured such that the UE115 does not have to decode a Physical Downlink Control Channel (PDCCH) or receive a Physical Downlink Shared Channel (PDSCH) transmission in certain subframes. In some implementations, the UE115 may continuously monitor the communication link 125 for indications that the UE115 may receive data. In other implementations (e.g., to conserve power and extend battery life), the UE115 may be configured with a DRX cycle.

The DRX cycle may include an on duration that the UE115 may monitor for control information (e.g., on the PDCCH) and a DRX period during which the UE115 may power down certain radio components. In some implementations, the UE115 may be configured with a short DRX cycle as well as a long DRX cycle. For example, the UE115 may enter a long DRX cycle if the UE is inactive for one or more short DRX cycles. The transitions between short DRX cycles, long DRX cycles, and continuous reception may be controlled by an internal timer or by messaging from the base station 105. In some implementations, the UE115 may receive a scheduling message on the PDCCH during the on-duration. While monitoring the PDCCH for scheduling messages, the UE115 may initiate a DRX inactivity timer. If the scheduling message is successfully received, the UE115 may prepare to receive data and the DRX inactivity timer may be reset. When the DRX inactivity timer expires without receiving a scheduling message, the UE115 may move to the short DRX cycle and may start a DRX short cycle timer. When the DRX short cycle timer expires, the UE115 may resume the long DRX cycle.

In some implementations, the DRX cycle may include a CDRX mode in which the UE115 remains connected to the base station 105 during both on durations (e.g., awake durations) and DRX periods (e.g., sleep periods). CDRX mode may allow UE115 to transition between sleep and awake states (e.g., DRX periods and on durations, respectively, or sleep and awake modes) without signals. The base station 105 may schedule transmissions during active times (e.g., awake states or on durations). Further, the UE115 may monitor a control channel (such as PDCCH) during the active time (i.e., wake up or wake up to monitor the control channel). In some implementations, the active time may include a time that an on-duration timer is running, a time that an inactivity timer is running, a time that an SR is pending, or a combination thereof. The UE115 may sleep when not in active time to conserve battery power.

Additionally or alternatively, the UE115 may enter an active time upon detecting that uplink data is to be transmitted to the base station 105. During the active time, the UE115 may perform SR operations to request resources and configuration information for subsequent transmission of uplink data. For example, the SR operation may include: the UE transmits the SR (e.g., via an uplink control channel, such as a Physical Uplink Control Channel (PUCCH)) to the base station 105, the base station 105 transmits an uplink grant (e.g., via a downlink control channel, such as PDCCH) to the UE115, and the UE115 transmits uplink data on resources as indicated in the uplink grant (e.g., via a separate uplink channel, such as a Physical Uplink Shared Channel (PUSCH)). Based on performing SR operations in a single active time of CDRX mode, UE115 may additionally save power.

Conventionally, the UE115 may communicate with a single base station 105 via a single antenna sub-array for CDRX mode, thereby reducing any complexity of determining to which base station 105 to transmit the SR when uplink data is detected. However, as described herein, the UE115 may include multiple antenna sub-arrays for communicating concurrently with multiple TRPs, where each antenna sub-array includes multiple antenna elements, which may be used for beamforming, transmit diversity, receive diversity, or MIMO communications from the antenna sub-arrays and the UE 115. In some implementations, the UE115 may use separate antenna sub-arrays for communication with the TRP based on, for example, the corresponding orientation of the antenna sub-arrays on the UE or the physical location of the antenna sub-arrays. For example, the UE115 may communicate with a first base station 105 via a first antenna sub-array, with a second base station 105 via a second antenna sub-array, with a third base station 105 via a third antenna sub-array, and so on.

Additionally or alternatively, the UE115 may communicate with multiple TRPs, which may be individual base stations 105, individual antenna arrays within the base stations 105, individual radio heads of the base stations 105, or a combination thereof, where each TRP is associated with a corresponding antenna sub-array (e.g., thereby creating a TRP-antenna sub-array pair). As such, in the case where multiple TRPs are configured for communication (e.g., multiple TRPs may be considered multi-TRP clusters), the UE115 may be uncertain as to which TRP and which antenna sub-array to transmit the SR to initiate the SR operation, which TRP and antenna sub-array to be used to receive uplink grants, and which TRP and antenna sub-array to be used to transmit subsequent uplink data.

Wireless communication system 100 may support efficient techniques for determining which TRPs and antenna sub-arrays to use for SR operation during CDRX mode when multiple TRPs are configured for simultaneous communication with UE 115. For example, a first TRP (i.e., a first TRP of a plurality of TRPs connected to UE115) may convey configuration information regarding: the UE115 is configured to use which antenna sub-arrays (and to which TRPs the SR is to be transmitted), which TRPs are used to receive uplink grants (and on which antenna sub-arrays), and which antenna sub-arrays are to be used (and to which TRPs the uplink data is to be transmitted) when transmitting uplink data, or a combination thereof. Based on the configuration information, the UE115 may perform SR operations with multiple TRPs using each corresponding antenna sub-array located on the UE115, perform SR operations with a single TRP using one corresponding antenna sub-array (e.g., which may be dynamically or semi-statically selected), or perform SR operations with a subset of TRPs using a corresponding subset of antenna sub-arrays. Additionally or alternatively, the UE115 may autonomously determine one or more TRP-antenna subarray pairs for transmitting uplink data and transmit an indication of the determined TRP-antenna subarray pairs with the SR. For example, the UE115 may transmit the indication to a first TRP, receive an uplink grant from the first TRP (or from each TRP indicated in the TRP-antenna subarray pair), and transmit uplink data to the determined TRP in the TRP-antenna subarray pair.

Fig. 2 illustrates an example of a communication system 200 that supports SR operation in CDRX mode according to aspects of the present disclosure. In some examples, the wireless communication system 200 may implement aspects of the wireless communication system 100. Wireless communication system 200 may include TRP 105-a and TRP 105-b, which may be examples of two base stations 105 as described above with reference to fig. 1. In some implementations, each TRP105 may be a separate antenna array of base station 105, a separate radio head of base station 105, or similar device for accessing a network. Additionally, TRP 105-a and TRP 105-b may be connected through backhaul link 134-a, enabling the two TRPs 105 to communicate directly with each other. In some implementations, TRP 105-a and TRP 105-b may be part of a multi-TRP cluster of multiple TRPs 105 with which UE115-a is configured to communicate (e.g., as an extension, there may be more than two TRPs 105 with which UE115-a may communicate, and such TRPs 105 may be associated with one, two, or more base stations). The wireless communication system 200 may also include a UE115-a, which may be an example of a corresponding UE115 as described above with reference to fig. 1.

As described herein, UE115-a may include multiple antenna sub-arrays 205 for communicating concurrently with each TRP105, where each antenna sub-array 205 includes multiple antenna elements 210. For example, UE115-a may communicate with TRP 105-a via antenna subarray 205-a and with TRP 105-b via antenna subarray 205-b, where TRP 105-a and antenna subarray 205-a may constitute a first TRP-antenna subarray pair and TRP 105-b and antenna subarray 205-b may constitute a second TRP-antenna subarray pair. Additionally, UE115-a may use antenna elements 210 of each antenna sub-array 205 to direct and form a respective beam 215 for communication with each TRP105, where beam 215-a is used for communication with TRP 105-a and beam 215-b is used for communication with TRP 105-b. Each TRP105 may also use a corresponding beam 220 for their respective communications with UE115-a, where TRP 105-a may use beam 220-a for communications with UE115-a and TRP 105-b may use beam 220-b for communications with UE 115-a. In some implementations, each beam 215 and 220 may be used for both transmitting and receiving information for UE115-a and TRPs 105-a and 105-b, respectively. Additionally or alternatively, at each wireless device (e.g., UE115-a or TRP 105-b), a first beam may be used to transmit information or data, while a second, separate beam may be used to receive information.

In some implementations, UE115-a may communicate with two TRPs 105 according to CDRX mode, where UE115-a monitors downlink communications from one or both TRPs 105 during the awake state of CDRX mode. However, when UE115-a includes multiple antenna sub-arrays 205 for communicating with multiple TRPs 105, uplink communications from UE115-a for CDRX mode may include uncertainty as to which antenna sub-array 205 is to be used to perform SR operations or with which TRP105 to perform SR operations. The SR operation may include: the UE115-a transmits the SR 230 to the one or more TRPs 105 via an uplink channel (e.g., PUCCH), the one or more TRPs 105 transmit an uplink grant to the UE115-a via a downlink channel (e.g., PDCCH), and the UE115-a transmits uplink data on resources as indicated in the uplink grant via a separate uplink channel (e.g., PUSCH).

In some implementations, to mitigate the uncertainty, the TRP 105-a (or a separate TRP105 operating as an anchor TRP) may transmit a configuration 225 to inform the UE115-a which TRP(s) 105 or antenna sub-array 205 are to be used to transmit the SR 230, the corresponding PDCCH, and the corresponding PUSCH. Based on configuration 225, UE115-a may use each antenna subarray 205 (i.e., each antenna subarray 205 located on UE 115-a) to transmit SR 230 to a respective TRP105 (e.g., to TRP 105-a on antenna subarray 205-a and to TRP 105-b on antenna subarray 205-b), to transmit SR 230 to a corresponding TRP105 on one antenna subarray 205 (e.g., to TRP 105-a on antenna subarray 205-a), or to transmit SR 230 to a corresponding TRP105 on a subset of the plurality of antenna subarrays 205 of UE 115-a. The respective TRP105, the corresponding TRP105, or a subset of the TRPs 105 may then transmit an uplink grant to UE115-a based on receiving SR 230. Additionally, UE115-a may then transmit uplink data using antenna subarray 205 used to transmit SR 230 and using antenna subarray 205 used to receive uplink grants.

In other implementations, to mitigate the uncertainty, the UE115-a may autonomously determine which TRP-antenna subarray pairs are suitable for SR operation (e.g., TRP105 suitable for transmitting uplink grants on PDCCH and antenna subarray 205 suitable for transmitting uplink data on PUSCH), and transmit the determination in SR 230. In some implementations, UE115-a may determine a TRP-antenna subarray pair based on a measured channel quality for each TRP 105. For example, UE115-a may use a first TRP-antenna subarray link (i.e., a first TRP-antenna subarray pair between antenna subarrays 205-a and TRP 105-a) for transmission of SR 230, for transmission of an uplink grant (e.g., on the PDCCH), or for transmission of both SR 230 and uplink grant (which supports power saving purposes at UE 115-a). Antenna sub-array 205-a may be an anchor antenna sub-array (e.g., a primary antenna sub-array) of UE 115-a. In some implementations, during off-duration cycles of CDRX mode (such as DRX periods and sleep periods), UE115-a may have more information about the channel than any TRP105, which may increase the chances of SR operation based on the more accurate information.

After receiving an uplink grant from the first TRP-antenna subarray link (e.g., from TRP 105-a), UE115-a may transmit uplink data to any TRP105 determined with the appropriate TRP-antenna subarray pair. Additionally or alternatively, the TRP 105-a may share information about the appropriate TRP-antenna subarray pair with TRP 105-b (or other TRPs 105) via backhaul link 134-a, and TRP 105-b (or other TRPs 105) may also transmit uplink grants to UE 115-a. In some implementations, the information shared across the backhaul link 134-a may include scheduling information for incoming uplink data. For example, the scheduling information may further include information about beam 220-b at TRP 105-b for receiving uplink data from UE 115-a.

As described above, communications between UE115-a and TRPs 105-a and 105-b (which may include downlink communications 235 and uplink communications 240) may occur in accordance with CDRX mode. Additionally, each of the downlink communications 235 and the uplink communications 240 may include one or more DRX cycles 245 having an on duration 250 followed by a sleep period (e.g., an inactive period, a DRX period, an off duration, or a sleep state) for the remainder of the DRX cycles 245 not occupied by the active time 255. For example, active time 255 may occur during on-duration 250 (e.g., active time 255-a corresponds to on-duration 250-a, active time 255-c corresponds to on-duration 250-c, etc.) or may occur for longer than on-duration 250 (such as active time 255-b being longer than on-duration 250-b). In the downlink communication 235, the UE115-a may receive the grant 260-a (e.g., on the PDCCH to look for a downlink grant for receiving subsequent downlink information), where receiving the grant 260-a initiates the inactivity timer 265. UE115-a may remain awake until inactivity timer 265 expires (e.g., extends active time 255-b beyond the end of on duration 250-b) and may then revert to the dormant state once inactivity timer 265 expires.

Similarly, in the uplink communication 240, the active time 255 may correspond to the on-duration 250 of the CDRX mode (e.g., the active times 255-d, 255-f, and 255-g may last for the same time span as the on-durations 250-a, 250-b, and 250-c, respectively). The on-duration 250 in the uplink communication 240 may correspond to the on-duration 250 of the downlink communication 235 (i.e., the on-duration 250 of the CDRX mode is configured for uplink or downlink communication). However, in uplink communications 240, if UE115-a detects that uplink data is to be transmitted to TRP105, UE115-a may wake up and transmit SR 270 (e.g., SR 230), which may begin an active time 255-e outside of on duration 250. The active time 255-e may include a period for a pending SR 275 where the UE115-a is waiting for a grant 260-b from the TRP105 (e.g., an uplink grant based on the SR 270). After receiving the grant 260-b (e.g., PDCCH carrying an uplink grant), the UE115-a may start the inactivity timer 265 and revert to the dormant state upon expiration of the inactivity timer if no further signaling is received from the TRP 105.

As described herein, the UE115-a may perform SR operations with one or more TRPs 105 during an active time 255 of the uplink communication 240 based on the configuration 225 or based on indicating an appropriate TRP-antenna subarray pair in the SR 230 (e.g., SR 270). For example, the UE115-a may transmit the SR 230 to the indicated TRP(s) 105 (e.g., from the configuration 225) or to the TRP 105-a (e.g., upon autonomous determination of a TRP-antenna subarray pair), receive an uplink grant from one or more of the TRPs 105 (e.g., the grant 260-b), and then transmit uplink data to one or more TRPs 105.

Fig. 3 illustrates an example of SR operation 300 in CDRX mode, according to aspects of the present disclosure. In some examples, the SR operation 300 may implement aspects of the wireless communication systems 100 and 200. The SR operation 300 may include TRP 105-c and TRP105-d, which may be examples of TRP105 or base station 105 as described above with reference to FIGS. 1 and 2. Additionally, TRP 105-c and TRP105-d may be connected by a backhaul link 134-b, thereby enabling the two TRPs 105 to communicate directly with each other. In some implementations, TRP 105-c and TRP105-d may be part of a multi-TRP cluster of multiple TRPs 105 with which UE115-b is configured to communicate (e.g., there may be more than two TRPs 105 with which UE115-b may communicate). The SR operation 300 may also include a UE115-b, which may be an example of a corresponding UE115 as described above with reference to fig. 1 and 2.

As described herein, UE115-b may include multiple antenna sub-arrays for concurrent communication with each TRP105, where each antenna sub-array includes multiple antenna elements. For example, UE115-b may communicate with TRP 105-c via a first antenna subarray and with TRP105-d via a second antenna subarray, where TRP 105-c and the first antenna subarray may constitute a first TRP-antenna subarray pair and TRP105-d and the second antenna subarray may constitute a second TRP-antenna subarray pair. Additionally, UE115-b may use the antenna elements of each antenna sub-array to direct and form a respective beam 305 for communication with each TRP105, where beam 305-a is used for communication with TRP 105-c and beam 305-b is used for communication with TRP 105-d. Each TRP105 may also use a corresponding beam 310 for their respective communications with UE115-b, where TRP 105-c may use beam 310-a for communications with UE115-b and TRP105-d may use beam 310-b for communications with UE 115-b. In some implementations, each beam 305 and 310 may be used for both transmitting and receiving information for UE115-b and TRPs 105-c and 105-d, respectively. Additionally or alternatively, at each wireless device (e.g., UE115-b or TRP 105-c or TRP 105-d), a first beam may be used to transmit information or data, while a second, separate beam may be used to receive information.

In some implementations, a TRP 105-c (e.g., an anchor TRP) may transmit a configuration 315 to a UE115-b, the configuration 315 informing the UE115-b which TRPs 105 or antenna sub-arrays to use for transmitting an SR 320, a corresponding PDCCH for receiving an uplink grant 325, and a corresponding PUSCH for transmitting uplink data 330. As shown, the configuration 315 may indicate that all sub-arrays of UE115-b are to transmit SR 320 simultaneously on PUCCH (e.g., uplink channel). Each associated TRP105 (e.g., as part of a respective TRP-antenna subarray pair) may need to monitor a respective PUCCH from UE 115-b. For example, UE115-b may transmit SR 320-a to TRP 105-c and SR 320-b to TRP 105-d. Subsequently, each TRP105 (e.g., in a multiple TRP cluster) may then transmit a separate PDCCH for uplink grant 325. For example, TRP 105-c may transmit uplink grant 325-a to UE115-b and TRP105-d may transmit a separate uplink grant 325-b to UE 115-b. In some implementations, even if UE115-b transmits SR 320 on each antenna sub-array, not every corresponding TRP105 may receive SR 320, and a TRP105 that does not receive SR 320 may not transmit a corresponding uplink grant 325, while a TRP105 that receives SR 320 may transmit a corresponding uplink grant 325.

The UE115-b may use all antenna sub-arrays associated with each TRP105 (e.g., in a multi-TRP cluster) for transmitting uplink data 330 via a separate PUSCH. For example, UE115-b may transmit uplink data 330-a to TRP 105-c and may transmit uplink data 330-b to TRP 105-d. Performing SR operations using all antenna sub-arrays of UE115-b and all TRPs 105 of a multi-TRP cluster may improve the reliability of receiving uplink grants 325 for transmitting subsequent uplink data 330. However, using all antenna sub-arrays may increase power consumption, reduce battery power, and battery life at UE 115-b.

Fig. 4 illustrates an example of SR operation 400 in CDRX mode, according to aspects of the present disclosure. In some examples, the SR operation 400 may implement aspects of the wireless communication systems 100 and 200. SR operation 400 may include TRP105-e and TRP105-f, which may be examples of TRP105 or base station 105 as described above with reference to FIGS. 1-3. Additionally, TRP105-e and TRP105-f may be connected by a backhaul link 134-c, thereby enabling the two TRPs 105 to communicate directly with each other. In some implementations, the TRP105-e and TRP105-f may be part of a multi-TRP cluster of a plurality of TRPs 105 with which the UE 115-c is configured to communicate (e.g., there may be more than two TRPs 105 with which the UE 115-c may communicate, and the more than two TRPs 105 may be associated with one, two, or more base stations). The SR operation 400 may also include a UE 115-c, which may be an example of a corresponding UE115 as described above with reference to fig. 1-3.

As described herein, UE 115-c may include multiple antenna sub-arrays for concurrent communication with each TRP105, where each antenna sub-array includes multiple antenna elements. For example, UE 115-c may communicate with TRP105-e via a first antenna subarray and with TRP105-f via a second antenna subarray, where TRP105-e and the first antenna subarray may constitute a first TRP-antenna subarray pair and TRP105-f and the second antenna subarray may constitute a second TRP-antenna subarray pair. Additionally, UE 115-c may use the antenna elements of each antenna sub-array to direct and form a respective beam 405 for communication with each TRP105, where beam 405 is used for communication with TRP 105-f. Each TRP105 may also use a corresponding beam 410 for their respective communications with UE 115-c, where TRP105-f may use beam 410 for communications with UE 115-c. In some implementations, each beam 405 and 410 may be used for both transmitting and receiving information for UE 115-c and TRPs 105-e and 105-f, respectively. Additionally or alternatively, at each wireless device (e.g., UE 115-c or TRP105-e or TRP105-f), a first beam may be used to transmit information or data, while a second, separate beam may be used to receive information.

In some implementations, a TRP105-e (e.g., an anchor TRP) may transmit a configuration 415 to a UE 115-c, the configuration 415 informing the UE 115-c which TRPs 105 or antenna sub-arrays to use for transmitting an SR 420, a corresponding PDCCH for receiving an uplink grant 425, and a corresponding PUSCH for transmitting uplink data 430. As shown, one antenna sub-array (or a subset of antenna sub-arrays) of UE 115-c may transmit SR 420 to TRP105-f on PUCCH. In some implementations, the TRP105-e may semi-statically select one antenna sub-array and indicate the selected antenna sub-array in configuration 415. For example, the TRP105-e may indicate the selected antenna sub-array via RRC signaling, MAC-CE, DCI message, or a combination thereof. In some implementations, the TRP105-e may select an antenna sub-array based on information previously received or indicated from UE 115-c. The selected antenna sub-array may be an anchor antenna sub-array (e.g., a primary antenna sub-array) of UE 115-c. Based on the anchor antenna sub-array, any predefined TRP(s) 105 associated with the anchor antenna sub-array(s) needs to monitor the PDCCH carrying SR 420.

Additionally or alternatively, UE 115-c may dynamically select one antenna sub-array (or a subset of antenna sub-arrays) without an indication from TRP105-e (e.g., without configuration 415). The UE 115-c may indicate the selected antenna sub-array(s) to the associated TRP105 in the PUCCH carrying the SR 420, where the associated TRP 105(s) need to monitor the PUCCH. However, in some implementations, the UE 115-c may not indicate the selected antenna sub-array because all TRPs 105 (i.e., including associated TRPs) with which the UE 115-c is configured to communicate (e.g., multiple TRP clusters) may need to monitor the SR 420, which may eliminate the need to signal the indication if these TRPs 105 are already monitoring the SR 420. By using one (or a subset) of antenna sub-arrays, UE 115-c may save power instead of using each antenna sub-array to transmit SR 420.

Based on transmitting the SR 420 to one selected TRP105 (or a subset of TRPs 105), the TRP105 detecting the SR 420 on the PUCCH may then transmit the PDCCH for the uplink grant 425. For example, the TRP105-f may receive SR 420 and then transmit an uplink grant 425 to the UE 115-c based on receiving SR 420. Additionally or alternatively, even if the UE 115-c transmits the SR 420 using one antenna sub-array (or a subset of antenna sub-arrays), each TRP105 in the TRP multi-cluster (or a greater number of TRPs 105 from the TRP multi-cluster than the TRP to which the UE 115-c transmits the SR 420) may transmit the uplink grant 425 to the UE 115-c. In some implementations, the TRP105 transmitting the uplink grant 425 without receiving the SR 420 may determine to transmit the uplink grant 425 based on information communicated from the TRP(s) 105 receiving the SR 420 over the backhaul link 134-c. UE 115-c may then use any antenna sub-array associated with TRP105 transmitting the PDCCH for transmitting uplink data 430 via the PUSCH. For example, based on receiving the uplink grant 425 from the TRP105-f, the UE 115-c may transmit uplink data 430 to the TRP105-f using the corresponding antenna sub-array.

Fig. 5 illustrates an example of SR operation 500 in CDRX mode, according to aspects of the present disclosure. In some examples, SR operation 500 may implement aspects of wireless communication systems 100 and 200. SR operation 500 may include TRP105-g and TRP105-h, which may be examples of TRP105 or base station 105 as described above with reference to FIGS. 1-4. Additionally, TRP105-g and TRP105-h may be connected by a backhaul link 134-d, thereby enabling two TRPs 105 to communicate directly with each other. In some implementations, TRP105-g and TRP105-h may be part of a multi-TRP cluster of multiple TRPs 105 with which UE115-d is configured to communicate (e.g., there may be more than two TRPs 105 with which UE115-d may communicate). The SR operation 500 may also include a UE115-d, which may be an example of a corresponding UE115 as described above with reference to fig. 1-4.

As described herein, UE115-d may include multiple antenna sub-arrays for concurrent communication with each TRP105, where each antenna sub-array includes multiple antenna elements. For example, UE115-d may communicate with TRP105-g via a first antenna subarray and with TRP105-h via a second antenna subarray, where TRP105-g and the first antenna subarray may constitute a first TRP-antenna subarray pair and TRP105-h and the second antenna subarray may constitute a second TRP-antenna subarray pair. Additionally, UE115-d may use the antenna elements of each antenna sub-array to direct and form a respective beam 505 for communication with each TRP105, where beam 505-a is used for communication with TRP105-g and beam 505-b is used for communication with TRP 105-h. Each TRP105 may also use a corresponding beam 510 for their respective communications with UE115-d, where TRP105-g may use beam 510-a for communications with UE115-d and TRP105-h may use beam 510-b for communications with UE 115-d. In some implementations, each beam 505 and 510 may be used for both transmitting and receiving information for UE115-d and TRPs 105-g and 105-h, respectively. Additionally or alternatively, at each wireless device (e.g., UE115-d or TRP105-g or TRP 105-h), a first beam may be used to transmit information or data, while a second, separate beam may be used to receive information.

In some implementations, the UE115-d may use one TRP-antenna subarray link (i.e., a first TRP-antenna subarray pair, wherein the first TRP-antenna subarray pair includes an anchor TRP) for SR 515 transmission, PDCCH transmission carrying an uplink grant 520, or a combination thereof based on the autonomous selection of the UE 115-d. Additionally or alternatively, the UE115-d may use more than one TRP-antenna sub-array link for SR 515 transmission and uplink grant 520 transmission/reception. In some implementations, the UE115-d may determine one or more TRP-antenna sub-array links based on a channel quality of each TRP in the multi-TRP cluster. The UE115-d may transmit information about TRP-antenna sub-array link(s) suitable (e.g., preferred) for PDCCH and PUSCH transmissions when transmitting SR 515. That is, SR 515 may include information regarding which TRP-subarray pair(s) are suitable for SR operations, e.g., PDCCH transmission of uplink grant 520 and PUSCH transmission(s) of uplink data 530. In some implementations, the UE115-d may indicate one or more TRPs 105 in transmission of SR 515 for subsequent SR operation transmission. The indication may be included in SR 515 by an additional bit within SR 515. During the off duration when operating in CDRX mode, UE115-d may have more information about the channel used for communication between UE115-d and TRP105, which may increase the accuracy of which TRP-antenna sub-array pair(s) are selected for subsequent SR operation transmissions after transmitting SR 515.

One or more TRPs 105 may then transmit the PDCCH for uplink grant 520. For example, TRP105-g may transmit uplink grant 520 based on information received with SR 515 from UE115-d and as part of a TRP-antenna subarray pair used for transmission of SR 515. Additionally or alternatively, multiple TRPs 105 (e.g., TRP105-g and TRP 105-h) may transmit uplink grant 520 based on information received with SR 515. For example, TRP105-g may transmit scheduling information 525 to TRP105-h via backhaul link 134-d, where scheduling information 525 includes information regarding the selected TRP-antenna subarray pair(s) as indicated in SR 515. Additionally, scheduling information 525 may include information about uplink receive beams that other TRPs 105 may use to receive uplink data 530 from UE 115-d. In some implementations, the uplink grant 520 may include a DCI message or MAC CE indicating configuration information about other TRPs 105 to be used for transmission of uplink data 530 (e.g., configuration information identified by the TRP105-g based on selected TRP-antenna subarray pair information(s) in the SR 515). Subsequently, UE115-d may then transmit uplink data 530 to TRP105 from the selected TRP-antenna subarray pair(s) via PUSCH. For example, UE115-d may transmit uplink data 530-a to TRP105-g and uplink data 530-b to TRP 105-h. In some implementations, dynamic TRP selection or simultaneous transmission to TRPs 105 may be possible for uplink data 530 transmission.

Additionally, in some implementations, a configuration message (e.g., similar to configuration 315 or 415 described above with reference to fig. 3 and 4, respectively) may be transmitted by TRP105 (e.g., TRP105-g or anchor TRP 105) to UE 115-d. The configuration message may inform the UE115-d how to transmit the SR 515 (e.g., to all associated TRPs 105 using the corresponding antenna sub-array, to at least one TRP105 using the dynamically selected antenna sub-array(s), or to at least one TRP105 using the semi-statically selected antenna sub-array (s)). In these implementations, the UE115-d may still select a suitable pair of TRP-antenna subarrays for transmitting the SR 515 and for performing the remainder of the SR operation, but may use the configuration message to determine other configuration information for transmitting the SR 515 and the remainder of the SR operation (e.g., information about the channels used to receive and transmit different messages of the SR operation, such as PDCCH and PUSCH).

Fig. 6 illustrates an example of a process flow 600 supporting SR operation in CDRX mode according to aspects of the present disclosure. In some examples, the process flow 600 may implement aspects of the wireless communication systems 100 and 200. Process flow 600 may include TRP 105-i and TRP 105-j, which may be examples of two TRPs 105 or base stations 105 as described above with reference to fig. 1-5. In some implementations, each TRP105 may be a separate antenna array of base station 105, a separate radio head of base station 105, or similar device for accessing a network. In some implementations, TRP 105-a and TRP 105-b may be part of a multi-TRP cluster of multiple TRPs 105 with which UE115-e is configured to communicate (e.g., there may be more than two TRPs 105 with which UE115-e may communicate). Process flow 600 may also include UE115-e, which may be an example of a corresponding UE115 as described above with reference to fig. 1-5.

In the following description of process flow 600, operations between UE115-e, TRP 105-i, and TRP 105-j may be performed in a different order or at a different time. Certain operations may also be excluded from the process flow 600 or other operations may be added to the process flow 600. Although UE115-e, TRP 105-i, and TRP 105-j are shown performing the operations of process flow 600, any wireless device may perform the operations shown.

At 605, the UE115-e may receive (e.g., from the TRP 105-i) a configuration indicating its own set of antenna sub-arrays (e.g., antenna panels), or TRP set, or a combination thereof, for the UE115-e to use to communicate (e.g., perform SR operations) when operating in DRX mode (e.g., CDRX mode). In some implementations, the UE115-e may receive the configuration in RRC signaling, or a DCI message, or a MAC-CE, or a combination thereof. Additionally, the TRP 105-i may identify an anchor TRP (e.g., itself, or another TRP such as TRP 105-j) in the set of TRPs, where the anchor TRP monitors the SR from UE 115-e.

At 610, the UE115-e may select at least one antenna subarray in its own set of antenna subarrays for transmitting an SR, or receiving an uplink grant, or transmitting uplink data, or a combination thereof (e.g., for SR operation).

At 615, the UE115-e, when operating in DRX mode, may transmit an SR based on the received configuration. In some implementations, the UE115-e may transmit the SR to the plurality of TRPs using its own plurality of antenna sub-arrays, where the set of TRPs with which the UE115-e communicates includes the plurality of TRPs and the set of antenna sub-arrays of the UE115-e includes the plurality of antenna sub-arrays. Additionally or alternatively, the UE115-e may transmit the SR using the set of antenna sub-arrays indicated by the received configuration or a set of antenna sub-arrays comprising a subset of the plurality of antenna sub-arrays of the UE 115-e. In some implementations, the UE115-e may transmit the SR to a first TRP (e.g., TRP 105-i) in the set of TRPs, to a second TRP (e.g., TRP 105-j) in the set of TRPs, and to additional TRPs in the set of TRPs. Additionally, the UE115-e may transmit the SR on an uplink control channel (e.g., PUCCH). In some implementations, the UE115-e may transmit the SR to the anchor TRP identified in 605.

At 620, the UE115-e may receive an uplink grant in response to the transmitted SR. In some implementations, the UE115-e may receive an uplink grant for a first TRP (e.g., TRP 105-i) from a first TRP in the set of TRPs in response to the transmitted SR and may receive an uplink grant for a second TRP from a second TRP in the set of TRPs in response to the transmitted SR. Additionally or alternatively, the set of TRPs may include multiple TRPs (e.g., multiple TRP clusters), and the UE115-e may receive an uplink grant for each TRP in the multiple TRPs in response to the transmitted SR. In some implementations, the UE115-e may transmit an SR to a first TRP (e.g., TRP 105-i) in the set of TRPs and may receive an uplink grant from the first TRP in response to the transmitted SR. Additionally, the UE115-e may receive an uplink grant on a downlink control channel (e.g., PDCCH). In some implementations, the TRP may determine to refrain from transmitting the uplink grant (e.g., via a second TRP in the set of TRPs) based on determining that the TRP failed to receive the second SR (e.g., via the second TRP).

At 625, the UE115-e may identify that one or more TRPs in the set of TRPs have transmitted an uplink grant in response to the transmitted SR.

At 630, the UE115-e may transmit uplink data based on the received uplink grant and the received configuration. In some implementations, the set of TRPs may include a plurality of TRPs, and UE115-e may transmit uplink data to each of the plurality of TRPs. Additionally or alternatively, the UE115-e may transmit uplink data to the one or more TRPs identified at 625. In some implementations, the UE115-e may transmit uplink data on an uplink shared channel (e.g., PUSCH). After transmission of uplink data, the UE115-e may return to an off state (sleep state) of the DRX cycle until the next on duration or until the UE115-e identifies uplink data to be sent and transmits another SR.

Fig. 7 illustrates an example of a process flow 700 to support SR operation in CDRX mode according to aspects of the present disclosure. In some examples, process flow 700 may implement aspects of wireless communication systems 100 and 200. Process flow 700 may include TRP 105-k and TRP 105-l, which may be examples of two TRPs 105 or base stations 105 as described above with reference to FIGS. 1-6. In some implementations, each TRP105 may be a separate antenna array of base station 105, a separate radio head of base station 105, or similar device for accessing a network. In some implementations, the TRP 105-k and TRP 105-l may be part of a multi-TRP cluster of multiple TRPs 105 with which the UE115-f is configured to communicate (e.g., there may be more than two TRPs 105 with which the UE115-f may communicate, and the more than two TRPs 105 may be associated with one, two, or more different base stations). Process flow 700 may also include UE115-f, which may be an example of a corresponding UE115 as described above with reference to fig. 1-6.

In the following description of process flow 700, operations between UE115-f, TRP 105-k, and TRP 105-l may be performed in a different order or at a different time. Certain operations may also be excluded from the process flow 700 or other operations may be added to the process flow 700. Although UE115-f, TRP 105-k, and TRP 105-l are shown performing the operations of process flow 700, any wireless device may perform the operations shown.

At 705, the UE115-f may determine channel qualities associated with each of a set of TRPs, each of a set of antenna sub-arrays (e.g., antenna panels) of the UE115-f, or a combination thereof.

At 710, the UE115-f, when operating in DRX mode (e.g., CDRX mode), may transmit an SR including an indication of a set of antenna sub-arrays, or a set of TRPs, or a combination thereof, of the UE115-f for performing SR operations. In some implementations, the UE115-f may determine a set of antenna sub-arrays or TRPs for the UE115-f to include in the indication based on the channel quality determination of 705. Additionally, the UE115-f may transmit the SR on an uplink control channel (e.g., PUCCH). In some implementations, the UE115-f may receive a configuration message from one of the TRPs (e.g., TRP 105-k or an anchor TRP) configured for communication with the UE115-f, the configuration message including information for the UE115-f to transmit the SR. For example, the configuration message may include information regarding the channel used to transmit the SR (e.g.,) And information on additional channels (e.g., PDCCH and PUSCH) used to transmit or receive additional messages for the SR operation.

At 715, the UE115-f may receive an uplink grant in response to the transmitted SR. In some implementations, the UE115-f may receive the uplink grant using the set of antenna sub-arrays for the UE115-f indicated in the transmitted SR. Additionally, the set of antenna sub-arrays may include multiple antenna sub-arrays of UE 115-f. In some implementations, the UE115-f may receive an uplink grant on a downlink control channel (e.g., PDCCH).

At 720, the UE115-f may transmit uplink data based on the received uplink grant and the indication in the transmitted SR. In some implementations, the set of TRPs may include a plurality of TRPs, and UE115-f may transmit uplink data to the plurality of TRPs based on the received uplink grant and the indication in the transmitted SR. Additionally, the UE115-f may transmit uplink data to the plurality of TRPs using a plurality of antenna sub-arrays, wherein the set of antenna arrays included in the indication in the transmitted SR includes the plurality of antenna sub-arrays. In some examples, the UE115-f may transmit the SR using a second antenna subarray of the set of antenna subarrays of the UE115-f, and may transmit uplink data on a first antenna subarray of the set of antenna subarrays of the UE115-f that is different from the second antenna subarray. Additionally, the UE115-f may transmit uplink data on an uplink shared channel (e.g., PUSCH). In some implementations, the UE115-f may receive the uplink grant using a set of antenna sub-arrays as indicated in the transmitted SR, the set of antenna sub-arrays including a second antenna sub-array that is different from a first antenna sub-array of the set of antenna sub-arrays used to transmit uplink data.

Fig. 8 illustrates a block diagram 800 of an apparatus 805 that supports SR operation in CDRX mode, in accordance with aspects of the present disclosure. The device 805 may be an example of aspects of a UE115 as described herein. The apparatus 805 may include a receiver 810, a UE communication manager 815, and a transmitter 820. The device 805 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

Receiver 810 can receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to SR operation in CDRX mode). Information may be passed to other components of device 805. The receiver 810 may be an example of aspects of the transceiver 1120 described with reference to fig. 11. Receiver 810 can utilize a single antenna or a set of antennas.

The UE communication manager 815 may receive a configuration indicating a set of antenna subarrays, or a set of TRPs, or a combination thereof, of the UE for the UE to communicate with when operating in DRX mode. Additionally, when operating in DRX mode, the UE communication manager 815 may transmit an SR based on the received configuration. In some implementations, the UE communication manager 815 may receive an uplink grant in response to the transmitted SR. Subsequently, the UE communication manager 815 may transmit uplink data based on the received uplink grant and the received configuration.

Additionally or alternatively, when operating in DRX mode, the UE communications manager 815 may transmit an SR that includes an indication of a set of antenna subarrays, or a set of TRPs, or a combination thereof, of the UE. In some implementations, the UE communication manager 815 may receive an uplink grant in response to the transmitted SR. Additionally, the UE communication manager 815 may transmit uplink data based on the received uplink grant and the indication in the transmitted SR. The UE communications manager 815 may be an example of aspects of the UE communications manager 1110 described herein.

In some examples, the UE communications manager 815 as described herein may be implemented to achieve one or more potential advantages. For example, by using the configuration of the set of antenna sub-arrays (e.g., indicated by the TRP or determined by the UE communication manager 815) for performing SR operations, the UE communication manager 815 may enable the UE115 to perform SR operations with higher reliability. Instead of using different antenna sub-arrays or attempting to perform SR operations with different TRPs, the UE communication manager 815 may perform SR operations with corresponding TRPs (e.g., TRP-antenna sub-array pairs) corresponding to the antenna sub-arrays using a configuration of the set of antenna sub-arrays selected to efficiently perform the SR operations. Based on this configuration using the antenna set, the UE communication manager 815 may enable the UE115 to reduce signaling overhead and save power by not using less efficient antenna sub-arrays and not performing multiple SR operations with other TRPs.

The UE communication manager 815, or subcomponents thereof, may be implemented in hardware, code executed by a processor (e.g., software or firmware), or any combination thereof. If implemented in code executed by a processor, the functions of the UE communication manager 815 or its subcomponents may be performed by a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in this disclosure.

The UE communications manager 815, or subcomponents thereof, may be physically located at different locations, including being distributed such that portions of the functionality are implemented by one or more physical components at different physical locations. In some examples, the UE communications manager 815, or subcomponents thereof, may be separate and distinct components in accordance with various aspects of the present disclosure. In some examples, the UE communications manager 815, or subcomponents thereof, may be combined with one or more other hardware components, including but not limited to an input/output (I/O) component, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof, in accordance with various aspects of the present disclosure.

The transmitter 820 may transmit signals generated by other components of the device 805. In some examples, the transmitter 820 may be co-located with the receiver 810 in a transceiver module. For example, the transmitter 820 may be an example of aspects of the transceiver 1120 described with reference to fig. 11. The transmitter 820 may utilize a single antenna or a set of antennas.

Fig. 9 illustrates a block diagram 900 of an apparatus 905 that supports SR operation in CDRX mode, according to aspects of the present disclosure. The device 905 may be an example of aspects of the device 805 or the UE115 as described herein. The apparatus 905 may include a receiver 910, a UE communications manager 915, and a transmitter 940. The device 905 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

Receiver 910 can receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to SR operation in CDRX mode). Information may be passed to other components of device 905. The receiver 910 may be an example of aspects of the transceiver 1120 described with reference to fig. 11. Receiver 910 can utilize a single antenna or a set of antennas.

The UE communications manager 915 may be an example of aspects of the UE communications manager 815 as described herein. The UE communications manager 915 may include an SR operation configuration receiver 920, an SR transmitter 925, an uplink grant receiver 930, and an uplink data transmitter 935. UE communications manager 915 may be an example of aspects of UE communications manager 1110 described herein.

The SR operation configuration receiver 920 may receive a configuration indicating a set of antenna subarrays, or a set of TRPs, or a combination thereof, of the UE for the UE to use to communicate when operating in DRX mode.

When operating in DRX mode, the SR transmitter 925 may transmit an SR based on the received configuration. Additionally or alternatively, when operating in DRX mode, the SR transmitter 925 may transmit an SR that includes an indication of a set of antenna sub-arrays, or a set of TRPs, or a combination thereof, for a UE.

The uplink grant receiver 930 may receive an uplink grant in response to the transmitted SR.

The uplink data transmitter 935 may transmit uplink data based on the received uplink grant and the received configuration. Additionally or alternatively, the uplink data transmitter 935 may transmit uplink data based on the received uplink grant and an indication in the transmitted SR.

Based on the technique of transmitting the SR according to the configuration of the antenna sub-arrays (e.g., the configuration indicated by the TRP or determined by the UE115), the processor of the UE115 (e.g., which controls the receiver 910, the transmitter 940, or the transceiver 1120 as described with reference to fig. 11) may conserve battery life by successfully transmitting the SR with higher reliability by utilizing the configuration of the antenna sub-arrays. Additionally, the processor may reduce signaling overhead for performing multiple SR operations with less efficient antenna sub-arrays and TRPs than those included in the configuration.

Transmitter 940 may transmit signals generated by other components of device 905. In some examples, the transmitter 940 may be co-located with the receiver 910 in a transceiver module. For example, the transmitter 940 may be an example of aspects of the transceiver 1120 described with reference to fig. 11. Transmitter 940 may utilize a single antenna or a set of antennas.

Fig. 10 illustrates a block diagram 1000 of a UE communications manager 1005 supporting SR operation in CDRX mode, in accordance with aspects of the present disclosure. UE communications manager 1005 may be an example of aspects of UE communications manager 815, UE communications manager 915, or UE communications manager 1110 described herein. The UE communications manager 1005 may include an SR operation configuration receiver 1010, an SR transmitter 1015, an uplink grant receiver 1020, an uplink data transmitter 1025, an antenna sub-array selector 1030, and a channel quality determination component 1035. Each of these modules may communicate with each other directly or indirectly (e.g., via one or more buses).

The SR operation configuration receiver 1010 may receive a configuration indicating a set of antenna subarrays, or a set of TRPs, or a combination thereof, of the UE for the UE to use to communicate when operating in DRX mode. In some examples, the SR operation configuration receiver 1010 may receive the configuration in one or more of RRC, DCI, or MAC-CE.

When operating in DRX mode, the SR transmitter 1015 may transmit an SR based on the received configuration. Additionally or alternatively, the SR transmitter 1015 may transmit an SR when operating in DRX mode, the SR including an indication of a set of antenna sub-arrays, or a set of TRPs, or a combination thereof, of the UE. In some examples, the SR transmitter 1015 may transmit the SR to a set of TRPs using a set of antenna sub-arrays of the UE, wherein the set of TRPs of the UE includes the set of TRPs and the set of antenna sub-arrays includes the set of antenna sub-arrays. In other examples, the SR transmitter 1015 may transmit the SR using a set of antenna subarrays indicated by the received configuration, the set of antenna subarrays including a subset of a set of antenna subarrays of the UE.

The uplink grant receiver 1020 may receive an uplink grant in response to the transmitted SR. In some examples, the uplink grant receiver 1020 may receive an uplink grant for a first TRP in the set of TRPs in response to the transmitted SR. Additionally or alternatively, the uplink grant receiver 1020 may receive an uplink grant for a second TRP in the set of TRPs from the second TRP in response to the transmitted SR. In some examples, the uplink grant receiver 1020 may receive an uplink grant for each TRP in the set of TRPs in response to the transmitted SR. Additionally or alternatively, the uplink grant receiver 1020 may receive the uplink grant using the set of antenna sub-arrays of the UE indicated in the transmitted SR. In some implementations, the SR may be transmitted to a first TRP of the set of TRPs, and the uplink grant may be received from the first TRP in response to the transmitted SR. Additionally or alternatively, the set of antenna sub-arrays may include a second antenna sub-array different from a first antenna sub-array of the set of antenna sub-arrays used to transmit uplink data. In some implementations, the set of antenna sub-arrays may include a plurality of antenna sub-arrays.

The uplink data transmitter 1025 may transmit uplink data based on the received uplink grant and the received configuration. Additionally or alternatively, the uplink data transmitter 1025 may transmit uplink data based on the received uplink grant and an indication in the transmitted SR. In some examples, uplink data transmitter 1025 may transmit uplink data to each of the set of TRPs. In other examples, the uplink data transmitter 1025 may identify that one or more TRPs in the set of TRPs have transmitted an uplink grant in response to the transmitted SR. Additionally or alternatively, the uplink data transmitter 1025 may transmit uplink data to the one or more TRPs based on the identification. In some implementations, the uplink data transmitter 1025 may transmit uplink data to a set of TRPs based on the received uplink grant and an indication in the transmitted SR. In some examples, the uplink data transmitter 1025 may transmit uplink data to the set of TRPs using a set of antenna sub-arrays of the UE, the set of antenna sub-arrays including the set of antenna sub-arrays.

In some implementations, the SR may be transmitted on an uplink control channel (e.g., PUCCH), the uplink grant may be received on a downlink control channel (e.g., PDCCH), and the uplink data may be transmitted on an uplink shared channel (e.g., PUSCH). Additionally, the SR may be transmitted using a second antenna sub-array of the set of antenna sub-arrays of the UE that is different from a first antenna sub-array of the set of antenna sub-arrays used to transmit uplink data.

The antenna subarray selector 1030 may select, by the UE, at least one antenna subarray of a set of antenna subarrays of the UE for transmitting an SR, or receiving an uplink grant, or transmitting uplink data, or a combination thereof.

Channel quality determining component 1035 may determine a channel quality associated with each of a set of TRPs, and may determine the set of TRPs based on the determined channel qualities, wherein the conveyed SR indicates the determined set of TRPs. Additionally or alternatively, channel quality determining component 1035 may determine a channel quality associated with each of a set of antenna subarrays of the UE, and may determine the set of antenna subarrays based on the determined channel qualities, wherein the communicated SR indicates the determined set of antenna subarrays.

Fig. 11 shows a diagram of a system 1100 including a device 1105 supporting SR operation in CDRX mode, according to aspects of the present disclosure. Device 1105 may be an example of or a component comprising device 805, device 905, or UE115 as described herein. The apparatus 1105 may include components for bi-directional voice and data communications, including components for transmitting and receiving communications, including a UE communications manager 1110, an I/O controller 1115, a transceiver 1120, an antenna 1125, a memory 1130, and a processor 1140. These components may be in electronic communication via one or more buses, such as bus 1145.

The UE communications manager 1110 may receive a configuration indicating a set of antenna subarrays, or a set of TRPs, or a combination thereof, of the UE for the UE to communicate with when operating in DRX mode. In some implementations, the UE communications manager 1110 may transmit the SR based on the received configuration when operating in the DRX mode. Additionally, the UE communications manager 1110 may receive an uplink grant in response to the transmitted SR. Subsequently, UE communications manager 1110 may transmit uplink data based on the received uplink grant and the received configuration.

Additionally or alternatively, when operating in DRX mode, the UE communications manager 1110 may transmit an SR that includes an indication of a set of antenna subarrays, or a set of TRPs, or a combination thereof, of the UE. In some implementations, the UE communications manager 1110 may receive an uplink grant in response to the transmitted SR. Additionally, the UE communications manager 1110 may transmit uplink data based on the received uplink grant and the indication in the transmitted SR.

I/O controller 1115 may manage devicesInput and output signals of the device 1105. I/O controller 1115 may also manage peripheral devices that are not integrated into device 1105. In some implementations, I/O controller 1115 may represent a physical connection or port to an external peripheral device. In some implementations, the I/O controller 1115 may utilize an operating system, such as Or another known operating system. In other implementations, the I/O controller 1115 may represent or interact with a modem, keyboard, mouse, touch screen, or similar device. In some implementations, the I/O controller 1115 may be implemented as part of a processor. In some implementations, a user can interact with the device 1105 via the I/O controller 1115 or via hardware components controlled by the I/O controller 1115.

The transceiver 1120 may communicate bi-directionally via one or more antennas, wired or wireless links, as described above. For example, the transceiver 1120 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver 1120 may also include a modem to modulate packets and provide the modulated packets to an antenna for transmission, as well as demodulate packets received from the antenna.

In some implementations, the wireless device may include a single antenna 1125. However, in some implementations, the device may have more than one antenna 1125, which may be capable of concurrently transmitting or receiving multiple wireless transmissions.

The memory 1130 may include Random Access Memory (RAM) and Read Only Memory (ROM). The memory 1130 may store computer-readable, computer-executable code 1135 comprising instructions that, when executed, cause the processor to perform various functions described herein. In some implementations, the memory 1130 may contain, among other things, a basic I/O system (BIOS) that may control basic hardware or software operations, such as interaction with peripheral components or devices.

Processor 1140 may include intelligent hardware devices (e.g., a general purpose processor, a DSP, a Central Processing Unit (CPU), a microcontroller, an ASIC, an FPGA, a programmable logic device, discrete gate or transistor logic components, discrete hardware components, or any combination thereof). In some implementations, the processor 1140 may be configured to operate a memory array using a memory controller. In other implementations, a memory controller may be integrated into processor 1140. The processor 1140 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 1130) to cause the device 1105 to perform various functions (e.g., functions or tasks to support SR operation in CDRX mode).

Code 1135 may include instructions for implementing aspects of the present disclosure, including instructions for supporting wireless communications. Code 1135 may be stored in a non-transitory computer-readable medium, such as a system memory or other type of memory. In some implementations, the code 1135 may not be directly executable by the processor 1140, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.

Fig. 12 shows a block diagram 1200 of an apparatus 1205 that supports SR operation in CDRX mode, according to aspects of the present disclosure. The device 1205 may be an example of aspects of a base station 105 as described herein. The apparatus 1205 may include a receiver 1210, a base station communication manager 1215, and a transmitter 1220. The device 1205 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

Receiver 1210 can receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to SR operation in CDRX mode). Information may be passed to other components of the device 1205. The receiver 1210 may be an example of aspects of the transceiver 1520 described with reference to fig. 15. Receiver 1210 can utilize a single antenna or a set of antennas.

The base station communications manager 1215 may communicate to the UE a configuration indicating a set of antenna subarrays, or a set of TRPs, or a combination thereof, for the UE to use for communications when operating in DRX mode. In some implementations, the base station communications manager 1215 may receive an SR from the UE based on the transmitted configuration. Additionally, the base station communications manager 1215 may transmit an uplink grant to the UE in response to the received SR. Subsequently, the base station communications manager 1215 may receive uplink data from the UE based on the transmitted uplink grant.

Additionally or alternatively, the base station communications manager 1215 may receive an SR from a UE operating in DRX mode, the SR including an indication of a set of antenna subarrays, or a set of TRPs, or a combination thereof, of the UE. In some implementations, the base station communications manager 1215 may transmit an uplink grant to the UE in response to the received SR. Additionally, the base station communications manager 1215 may receive uplink data based on the transmitted uplink grant and the indication in the received SR. The base station communications manager 1215 may be an example of aspects of the base station communications manager 1510 described herein.

The base station communications manager 1215, or subcomponents thereof, may be implemented in hardware, code executed by a processor (e.g., software or firmware), or any combination thereof. If implemented in code executed by a processor, the functions of the base station communications manager 1215, or subcomponents thereof, may be performed by a general purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in this disclosure.

The base station communications manager 1215, or subcomponents thereof, may be physically located at different locations, including being distributed such that portions of the functionality are implemented by one or more physical components at different physical locations. In some examples, the base station communications manager 1215, or subcomponents thereof, may be separate and distinct components in accordance with various aspects of the present disclosure. In some examples, the base station communications manager 1215, or subcomponents thereof, may be combined with one or more other hardware components (including, but not limited to, an I/O component, a transceiver, a network server, another computing device, one or more other components described in this disclosure, or combinations thereof), in accordance with various aspects of the present disclosure.

Transmitter 1220 may transmit signals generated by other components of device 1205. In some examples, the transmitter 1220 may be co-located with the receiver 1210 in a transceiver module. For example, the transmitter 1220 may be an example of aspects of the transceiver 1520 described with reference to fig. 15. Transmitter 1220 may utilize a single antenna or a set of antennas.

Fig. 13 illustrates a block diagram 1300 of a device 1305 that supports SR operation in CDRX mode, in accordance with aspects of the present disclosure. The device 1305 may be an example of aspects of a device 1205, or a base station 105, as described herein. The device 1305 may include a receiver 1310, a base station communications manager 1315, and a transmitter 1340. The device 1305 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

Receiver 1310 can receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to SR operation in CDRX mode). Information may be communicated to other components of the device 1305. The receiver 1310 may be an example of aspects of the transceiver 1520 described with reference to fig. 15. Receiver 1310 may utilize a single antenna or a set of antennas.

The base station communications manager 1315 may be an example of aspects of the base station communications manager 1215 as described herein. The base station communications manager 1315 may include a configuration transmitter 1320, an SR receiver 1325, an uplink grant transmitter 1330, and an uplink data receiver 1335. The base station communications manager 1315 may be an example of aspects of the base station communications manager 1510 described herein.

The configuration transmitter 1320 may transmit a configuration to the UE indicating the UE's set of antenna subarrays, or the set of TRPs, or a combination thereof, for the UE to use to communicate when operating in DRX mode.

The SR receiver 1325 may receive an SR from the UE based on the transmitted configuration. Additionally or alternatively, the SR receiver 1325 may receive an SR from a UE operating in DRX mode, the SR including an indication of a set of antenna sub-arrays, or a set of TRPs, or a combination thereof, of the UE.

The uplink grant transmitter 1330 may transmit an uplink grant to the UE in response to the received SR.

An uplink data receiver 1335 may receive uplink data from the UE based on the transmitted uplink grant. Additionally or alternatively, the uplink data receiver 1335 may receive uplink data based on the transmitted uplink grant and the indication in the received SR.

Transmitter 1340 may transmit signals generated by other components of device 1305. In some examples, the transmitter 1340 may be co-located with the receiver 1310 in a transceiver module. For example, the transmitter 1340 may be an example of aspects of the transceiver 1520 described with reference to fig. 15. Transmitter 1340 may utilize a single antenna or a set of antennas.

Fig. 14 shows a block diagram 1400 of a base station communication manager 1405 supporting SR operation in CDRX mode, according to aspects of the present disclosure. The base station communications manager 1405 may be an example of aspects of the base station communications manager 1215, base station communications manager 1315, or base station communications manager 1510 described herein. The base station communication manager 1405 may include a configuration transmitter 1410, an SR receiver 1415, an uplink grant transmitter 1420, an uplink data receiver 1425, and an anchor TRP identifier 1430. Each of these modules may communicate with each other directly or indirectly (e.g., via one or more buses).

The configuration transmitter 1410 may transmit a configuration to the UE indicating a set of antenna subarrays, or a set of TRPs, or a combination thereof, of the UE for the UE to use to communicate when operating in DRX mode. In some examples, configuration transmitter 1410 may transmit the configuration in one or more of RRC signaling, DCI, or MAC-CE.

The SR receiver 1415 may receive an SR from the UE based on the transmitted configuration. Additionally or alternatively, the SR receiver 1415 may receive an SR from a UE operating in DRX mode, the SR including an indication of a set of antenna sub-arrays, or a set of TRPs, or a combination thereof, of the UE. In some examples, the SR receiver 1415 may receive the SR via a set of TRPs, where each of the set of TRPs monitors the SR from the UE. In other examples, the SR receiver 1415 may receive the SR via one of a set of TRPs, where each of the set of TRPs monitors the SR from the UE. In some implementations, the indicated set of TRPs may be determined based on channel qualities associated with each of the set of TRPs, or each of the set of antenna sub-arrays, or a combination thereof. Additionally or alternatively, the indicated set of antenna subarrays is determined based on a channel quality associated with each of the set of TRPs, or each of the set of antenna subarrays, or a combination thereof.

The uplink grant transmitter 1420 may transmit an uplink grant to the UE in response to the received SR. In some examples, the uplink grant transmitter 1420 may transmit a second uplink grant for a second TRP of the set of TRPs via the second TRP in response to the received SR. In some implementations, the uplink grant transmitter 1420 may determine to refrain from transmitting the uplink grant via a second TRP of the set of TRPs based on determining that the base station failed to receive the second SR via the second TRP. Additionally or alternatively, the uplink grant transmitter 1420 may transmit the uplink grant via at least one of the set of TRPs indicated in the received SR. In some examples, the uplink grant transmitter 1420 may determine one of a set of TRPs indicated in the received SR, the uplink grant being transmitted via the determined one TRP. In other examples, the uplink grant transmitter 1420 may determine a set of TRPs in the set of TRPs indicated in the received SR via which the uplink grant was transmitted. In some implementations, the SR may be received via a first TRP of the set of TRPs, and the uplink grant may be transmitted via the first TRP in response to the received SR.

The uplink data receiver 1425 may receive uplink data from the UE based on the transmitted uplink grant. Additionally or alternatively, the uplink data receiver 1425 may receive uplink data based on the transmitted uplink grant and the indication in the received SR. In some examples, the uplink data receiver 1425 may receive uplink data via each of a set of TRPs, where the set of TRPs includes the set of TRPs. In other examples, the uplink data receiver 1425 may identify that one or more TRPs in the set of TRPs have transmitted an uplink grant in response to the received SR. Additionally or alternatively, the uplink data receiver 1425 may receive uplink data from the UE via the one or more TRPs based on the identification. In some examples, the uplink data receiver 1425 may receive uplink data from the UE via a plurality of TRPs based on the transmitted uplink grant and the indication in the received SR, the set of TRPs including the plurality of TRPs.

In some implementations, the SR may be received on an uplink control channel (e.g., PUCCH), the uplink grant may be transmitted on a downlink control channel (e.g., PDCCH), and the uplink data may be received on an uplink shared channel (e.g., PUSCH). Additionally, the SR may be received via a second TRP of the set of TRPs that is different from a first TRP of the set of TRPs used to receive uplink data.

The anchor TRP identifier 1430 may identify an anchor TRP in a set of TRPs, wherein the anchor TRP monitors an SR from the UE and may receive the SR via the anchor TRP.

Fig. 15 shows a diagram of a system 1500 including a device 1505 that supports SR operation in CDRX mode, according to aspects of the present disclosure. Device 1505 may be an example of, or include components of, device 1205, device 1305, or base station 105 as described herein. The device 1505 may include components for bi-directional voice and data communications, including components for transmitting and receiving communications, including a base station communications manager 1510, a network communications manager 1515, a transceiver 1520, an antenna 1525, a memory 1530, a processor 1540, and an inter-station communications manager 1545. These components may be in electronic communication via one or more buses, such as bus 1550.

The base station communication manager 1510 may transmit a configuration to the UE indicating a set of antenna subarrays, or a set of TRPs, or a combination thereof, of the UE for the UE to use to communicate when operating in DRX mode. In some implementations, the base station communication manager 1510 may receive an SR from the UE based on the transmitted configuration. Additionally, the base station communication manager 1510 may transmit an uplink grant to the UE in response to the received SR and receive uplink data from the UE based on the transmitted uplink grant.

Additionally or alternatively, the base station communication manager 1510 may receive an SR from a UE operating in DRX mode, the SR including an indication of a set of antenna sub-arrays, or a set of TRPs, or a combination thereof, of the UE. In some implementations, the base station communications manager 1510 may transmit an uplink grant to the UE in response to the received SR. Additionally, the base station communication manager 1510 may receive uplink data based on the transmitted uplink grant and the indication in the received SR.

The network communication manager 1515 may manage communication with the core network (e.g., via one or more wired backhaul links). For example, the network communication manager 1515 may manage the communication of data communications for client devices (such as one or more UEs 115).

The transceiver 1520 may communicate bi-directionally via one or more antennas, wired or wireless links, as described above. For example, the transceiver 1520 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver 1520 may also include a modem to modulate packets and provide the modulated packets to the antennas for transmission, as well as demodulate packets received from the antennas.

In some implementations, the wireless device can include a single antenna 1525. However, in some implementations, the device may have more than one antenna 1525, which may be capable of concurrently transmitting or receiving multiple wireless transmissions.

The memory 1530 may include RAM, ROM, or a combination thereof. The memory 1530 may store computer readable code 1535 comprising instructions that, when executed by the processor (e.g., processor 1540), cause the device to perform the various functions described herein. In some implementations, the memory 1530 may contain, among other things, a BIOS that may control basic hardware or software operations, such as interaction with peripheral components or devices.

Processor 1540 may include intelligent hardware devices (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, discrete gate or transistor logic components, discrete hardware components, or any combination thereof). In some implementations, processor 1540 may be configured to operate the memory array using a memory controller. In some implementations, a memory controller may be integrated into processor 1540. The processor 1540 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 1530) to cause the device 1505 to perform various functions (e.g., functions or tasks to support SR operation in CDRX mode).

The inter-station communication manager 1545 may manage communications with other base stations 105, and may include a controller or scheduler for controlling communications with UEs 115 in cooperation with other base stations 105. For example, the inter-station communication manager 1545 may coordinate scheduling of transmissions to the UEs 115 for various interference mitigation techniques, such as beamforming or joint transmission. In some examples, the inter-station communication manager 1545 may provide an X2 interface within LTE/LTE-a wireless communication network technology to provide communication between base stations 105.

Code 1535 may include instructions for implementing aspects of the present disclosure, including instructions for supporting wireless communications. Code 1535 may be stored in a non-transitory computer-readable medium, such as system memory or other type of memory. In some implementations, the code 1535 may not be directly executable by the processor 1540, but may cause the computer (e.g., when compiled and executed) to perform the functions described herein.

Fig. 16 shows a flow diagram illustrating a method 1600 of supporting SR operation in CDRX mode according to aspects of the present disclosure. The operations of method 1600 may be implemented by UE115 or components thereof as described herein. For example, the operations of method 1600 may be performed by a UE communications manager as described with reference to fig. 8-11. In some examples, the UE may execute a set of instructions to control the functional elements of the UE to perform the functions described below. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the functions described below.

At 1605, the UE may receive a configuration indicating a set of antenna subarrays, or a set of TRPs, or a combination thereof, of the UE for the UE to use to communicate when operating in DRX mode. 1605 may be performed in accordance with the methods described herein. In some examples, aspects of the operation of 1605 may be performed by the SR operation configuration receiver as described with reference to fig. 8-11.

At 1610, the UE may transmit an SR based on the received configuration when operating in DRX mode. 1610 may be performed according to the methods described herein. In some examples, aspects of the operations of 1610 may be performed by an SR transmitter as described with reference to fig. 8-11.

At 1615, the UE may receive an uplink grant in response to the transmitted SR. 1615 may be performed according to the methods described herein. In some examples, aspects of the operation of 1615 may be performed by an uplink grant receiver as described with reference to fig. 8-11.

At 1620, the UE may transmit uplink data based on the received uplink grant and the received configuration. 1620 may be performed according to methods described herein. In some examples, aspects of the operations of 1620 may be performed by an uplink data transmitter as described with reference to fig. 8-11.

Fig. 17 shows a flow diagram illustrating a method 1700 of supporting SR operation in CDRX mode, according to aspects of the present disclosure. The operations of method 1700 may be implemented by a UE115 or components thereof as described herein. For example, the operations of method 1700 may be performed by a UE communications manager as described with reference to fig. 8-11. In some examples, the UE may execute a set of instructions to control the functional elements of the UE to perform the functions described below. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the functions described below.

At 1705, the UE may receive a configuration indicating a set of antenna subarrays, or a set of TRPs, or a combination thereof, of the UE for the UE to use to communicate when operating in DRX mode. 1705 may be performed according to the methods described herein. In some examples, aspects of the operations of 1705 may be performed by an SR operation configuration receiver as described with reference to fig. 8-11.

At 1710, the UE may: selecting, by the UE, at least one antenna subarray in a set of antenna subarrays of the UE for transmitting an SR, or receiving an uplink grant, or transmitting uplink data, or a combination thereof. The operations of 1710 may be performed according to the methods described herein. In some examples, aspects of the operations of 1710 may be performed by an antenna sub-array selector as described with reference to fig. 8-11.

At 1715, the UE may transmit an SR based on the received configuration while operating in DRX mode. 1715 may be performed according to the methods described herein. In some examples, aspects of the operations of 1715 may be performed by an SR transmitter as described with reference to fig. 8-11.

At 1720, the UE may receive an uplink grant in response to the transmitted SR. Operations of 1720 may be performed according to methods described herein. In some examples, aspects of the operations of 1720 may be performed by an uplink grant receiver as described with reference to fig. 8-11.

At 1725, the UE may transmit uplink data based on the received uplink grant and the received configuration. 1725 operations may be performed in accordance with the methods described herein. In some examples, aspects of the operations of 1725 may be performed by an uplink data transmitter as described with reference to fig. 8-11.

Fig. 18 shows a flow diagram illustrating a method 1800 of supporting SR operation in CDRX mode according to aspects of the present disclosure. The operations of method 1800 may be implemented by UE115 or components thereof as described herein. For example, the operations of method 1800 may be performed by a UE communications manager as described with reference to fig. 8-11. In some examples, the UE may execute a set of instructions to control the functional elements of the UE to perform the functions described below. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the functions described below.

At 1805, the UE may transmit an SR when operating in DRX mode, the SR including an indication of a set of antenna sub-arrays, or a set of TRPs, or a combination thereof, of the UE. 1805 may be performed in accordance with the methods described herein. In some examples, aspects of the operations of 1805 may be performed by an SR transmitter as described with reference to fig. 8-11.

At 1810, the UE may receive an uplink grant in response to the transmitted SR. 1810 may be performed in accordance with the methods described herein. In some examples, aspects of the operations of 1810 may be performed by an uplink grant receiver as described with reference to fig. 8-11.

At 1815, the UE may transmit uplink data based on the received uplink grant and the indication in the transmitted SR. 1815 may be performed according to the methods described herein. In some examples, aspects of the operations of 1815 may be performed by an uplink data transmitter as described with reference to fig. 8-11.

Fig. 19 shows a flow diagram illustrating a method 1900 of supporting SR operation in CDRX mode according to aspects of the present disclosure. The operations of method 1900 may be implemented by a base station 105 or components thereof as described herein. For example, the operations of method 1900 may be performed by a base station communications manager as described with reference to fig. 12-15. In some examples, a base station may execute a set of instructions to control the functional elements of the base station to perform the functions described below. Additionally or alternatively, the base station may use dedicated hardware to perform aspects of the functions described below.

At 1905, the base station may transmit a configuration to the UE indicating a set of antenna subarrays, or a set of TRPs, or a combination thereof, of the UE for the UE to use to communicate when operating in DRX mode. 1905 may be performed according to the methods described herein. In some examples, aspects of the operations of 1905 may be performed by configuring a transmitter as described with reference to fig. 12-15.

At 1910, the base station may receive an SR from the UE based on the transmitted configuration. 1910 may be performed according to the methods described herein. In some examples, aspects of the operations of 1910 may be performed by an SR receiver as described with reference to fig. 12-15.

At 1915, the base station may transmit an uplink grant to the UE in response to the received SR. 1915 may be performed according to the methods described herein. In some examples, aspects of the operations of 1915 may be performed by an uplink grant transmitter as described with reference to fig. 12-15.

At 1920, the base station may receive uplink data from the UE based on the transmitted uplink grant. The operations of 1920 may be performed according to the methods described herein. In some examples, aspects of the operations of 1920 may be performed by an uplink data receiver as described with reference to fig. 12-15.

Fig. 20 shows a flow diagram illustrating a method 2000 of supporting SR operation in CDRX mode, according to aspects of the present disclosure. The operations of method 2000 may be implemented by a base station 105 or components thereof as described herein. For example, the operations of method 2000 may be performed by a base station communications manager as described with reference to fig. 12-15. In some examples, a base station may execute a set of instructions to control the functional elements of the base station to perform the functions described below. Additionally or alternatively, the base station may use dedicated hardware to perform aspects of the functions described below.

At 2005, a base station may receive a SR from a UE operating in DRX mode, the SR including an indication of a set of antenna subarrays, or a set of TRPs, or a combination thereof, of the UE. 2005 may be performed according to the methods described herein. In some examples, aspects of the operations of 2005 may be performed by an SR receiver as described with reference to fig. 12-15.

At 2010, the base station may transmit an uplink grant to the UE in response to the received SR. The operations of 2010 may be performed in accordance with the methods described herein. In some examples, aspects of the operations of 2010 may be performed by an uplink grant transmitter as described with reference to fig. 12-15.

At 2015, the base station may receive uplink data based on the transmitted uplink grant and the indication in the received SR. The operations of 2015 may be performed according to methods described herein. In some examples, aspects of the operations of 2015 may be performed by an uplink data receiver as described with reference to fig. 12-15.

It should be noted that the methods described herein describe possible implementations, and that the operations and steps may be rearranged or otherwise modified and that other implementations are possible. Further, aspects from two or more methods may be combined.

The techniques described herein may be used for various wireless communication systems such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), single carrier frequency division multiple access (SC-FDMA), and others. A CDMA system may implement a radio technology such as CDMA2000 or Universal Terrestrial Radio Access (UTRA). CDMA2000 covers IS-2000, IS-95 and IS-856 standards. The IS-2000 version may often be referred to as CDMA 20001X or 1X. IS-856(TIA-856) IS often referred to as CDMA 20001 xEV-DO or High Rate Packet Data (HRPD). UTRA includes wideband CDMA (wcdma) and other CDMA variants. TDMA systems may implement radio technologies such as global system for mobile communications (GSM).

The OFDMA system may implement radio technologies such as Ultra Mobile Broadband (UMB), evolved UTRA (E-UTRA), Institute of Electrical and Electronics Engineers (IEEE)802.11(Wi-Fi), IEEE 802.16(WiMAX), IEEE802.20, or Flash-OFDM. UTRA and E-UTRA are parts of the Universal Mobile Telecommunications System (UMTS). LTE, LTE-A and LTE-A Pro are versions of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE-A, LTE-A Pro, NR, and GSM are described in literature from an organization named "third Generation partnership project" (3 GPP). CDMA2000 and UMB are described in documents from an organization named "third generation partnership project 2" (3GPP 2). The techniques described herein may be used for both the systems and radio technologies mentioned herein and for other systems and radio technologies. Although aspects of the LTE, LTE-A, LTE-A Pro or NR system may be described for exemplary purposes and LTE, LTE-A, LTE-A Pro or NR terminology may be used in much of the description, the techniques described herein may also be applied to applications other than LTE, LTE-A, LTE-A Pro or NR applications.

A macro cell typically covers a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscriptions with the network provider. A small cell may be associated with a lower power base station (as compared to a macro cell), and the small cell may operate in the same or a different (e.g., licensed or unlicensed) frequency band as the macro cell. According to various examples, a small cell may include a picocell, a femtocell, and a microcell. A picocell, for example, may cover a small geographic area and may allow unrestricted access by UEs with service subscriptions with the network provider. A femtocell may also cover a smaller geographic area (e.g., a residence) and may provide restricted access by UEs associated with the femtocell (e.g., UEs in a Closed Subscriber Group (CSG), UEs of users in the residence, etc.). The eNB for a macro cell may be referred to as a macro eNB. An eNB for a small cell may be referred to as a small cell eNB, pico eNB, femto eNB, or home eNB. An eNB may support one or more (e.g., two, three, four, etc.) cells and may also support communication using one or more component carriers.

The wireless communication systems described herein may support synchronous or asynchronous operation. For synchronous operation, the base stations may have similar frame timing, and transmissions from different base stations may be approximately aligned in time. For asynchronous operation, each base station may have different frame timing, and transmissions from different base stations may not be aligned in time. The techniques described herein may be used for synchronous or asynchronous operations.

Information and signals described herein may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

The various illustrative blocks and modules described in connection with the disclosure herein may be implemented or performed with a general purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration).

The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of the disclosure and the following claims. For example, due to the nature of software, the functions described herein may be implemented using software executed by a processor, hardware, firmware, hard-wired, or any combination thereof. Features that perform a function may also be physically located at different positions, including being distributed such that portions of the function are performed at different physical locations.

Computer-readable media includes both non-transitory computer storage media and communication media, including any medium that facilitates transfer of a computer program from one place to another. Non-transitory storage media may be any available media that can be accessed by a general purpose or special purpose computer. By way of example, and not limitation, non-transitory computer-readable media can comprise RAM, ROM, electrically erasable programmable ROM (eeprom), flash memory, Compact Disc (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that can be used to carry or store desired program code means in the form of instructions or data structures and that can be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. Any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. Disk (disk) and disc (disc), as used herein, includes CD, laser disc, optical disc, Digital Versatile Disc (DVD), floppy disk and blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer-readable media.

As used herein, including in the claims, "or" as used in a list of items (e.g., a list of items accompanied by a phrase such as "at least one of" or "one or more of") indicates an inclusive list, such that, for example, a list of at least one of A, B or C means a or B or C or AB or AC or BC or ABC (i.e., a and B and C). Also, as used herein, the phrase "based on" should not be read as referring to a closed condition set. For example, an exemplary step described as "based on condition a" may be based on both condition a and condition B without departing from the scope of the present disclosure. In other words, the phrase "based on," as used herein, should be interpreted in the same manner as the phrase "based, at least in part, on.

In the drawings, similar components or features may have the same reference numerals. Further, various components of the same type may be distinguished by following the reference label by a dash and a second label that distinguishes among the similar components. If only the first reference label is used in the specification, the description may apply to any one of the similar components having the same first reference label irrespective of the second reference label, or other subsequent reference label.

The illustrations set forth herein in connection with the figures describe example configurations and are not intended to represent all examples that may be implemented or fall within the scope of the claims. The term "exemplary" as used herein means "serving as an example, instance, or illustration," and does not mean "preferred" or "advantageous over other examples. The detailed description includes specific details to provide an understanding of the described technology. However, the techniques may be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form in order to avoid obscuring the concepts of the described examples.

The description herein is provided to enable any person skilled in the art to make or use the present disclosure. Various modifications to the disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other variations without departing from the scope of the disclosure. Thus, the disclosure is not intended to be limited to the examples and designs described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.