阅读说明：本技术 用于超可靠低等待时间通信(urllc)的物理下行链路控制信道(pdcch)重复和解码 (Physical Downlink Control Channel (PDCCH) repetition and decoding for ultra-reliable low-latency communications (URLLC) ) 是由 杨桅 S·侯赛尼 蒋靖 于 2019-01-18 设计创作，主要内容包括：本公开的某些方面一般涉及无线通信系统,并且更具体地涉及控制信息的软组合。例如,某些方面提供了一种用于无线通信的方法。该方法一般包括在多个时间区间中的不同时间区间期间监视多个物理下行链路控制信道(PDCCH)中的每一者中的控制信息,其中这些PDCCH包含相同的控制信息,该控制信息指示相应时间区间内用于接收多个物理下行链路共享信道(PDSCH)之一的资源分配,其中该多个PDSCH中的每一者中的数据是相同的。在某些方面,该方法还包括对多个PDCCH进行软组合以解码控制信息,以及基于多个PDCCH的软组合来解码控制信息。(Certain aspects of the present disclosure generally relate to wireless communication systems and, more particularly, to soft combining of control information. For example, certain aspects provide a method for wireless communication. The method generally includes monitoring control information in each of a plurality of Physical Downlink Control Channels (PDCCHs) during different ones of a plurality of time intervals, wherein the PDCCHs contain the same control information, the control information indicating a resource allocation for receiving one of a plurality of Physical Downlink Shared Channels (PDSCHs) within the respective time interval, wherein data in each of the plurality of PDSCHs is the same. In certain aspects, the method further comprises soft combining the plurality of PDCCHs to decode the control information, and decoding the control information based on the soft combining of the plurality of PDCCHs.)

1. A method for wireless communication, comprising:

monitoring, at a User Equipment (UE), control information in each of a plurality of Physical Downlink Control Channels (PDCCHs) during different ones of a plurality of time intervals, wherein the PDCCHs contain the same control information indicating resource allocations for receiving one of a plurality of Physical Downlink Shared Channels (PDSCHs) for respective ones of the time intervals, wherein data in each of the plurality of PDSCHs is the same;

soft-combining the plurality of PDCCHs to decode the control information; and

decoding the control information based on soft combining of the plurality of PDCCHs.

2. The method of claim 1, further comprising:

receiving each of the plurality of PDSCHs in a respective time interval of the plurality of time intervals;

soft combining the plurality of PDSCHs based on the control information; and

decoding data within the plurality of PDSCHs based on the soft combining of the plurality of PDSCHs.

3. The method of claim 2, further comprising:

transmitting, after at least one of the plurality of time intervals, an indication of whether at least one of control information or data within a previous time interval was successfully decoded.

4. The method of claim 3,

the indication comprises a Negative Acknowledgement (NACK) if control information in the PDCCH of the previous time interval is successfully decoded and data in the PDSCH of the previous time interval is not successfully decoded; and

the indication includes an Acknowledgement (ACK) in case the control information and data of the previous time interval are successfully decoded.

5. The method of claim 4, wherein if the indication comprises a NACK, each of one or more of the plurality of time intervals subsequent to the previous time interval comprises one of the plurality of PDSCHs, and if the indication comprises a NACK, the previous time interval is a last time interval with one of the plurality of PDCCHs.

6. The method of claim 4, wherein the previous time interval is a last time interval with one of the plurality of PDCCHs or one of the plurality of PDSCHs if the indication comprises an ACK.

7. The method of claim 2, further comprising:

determining a number of PDCCHs that are soft combined prior to successful decoding of the control information, wherein the number of PDSCHs that are soft combined corresponds to the number of PDCCHs that are soft combined prior to successful decoding of the control information.

8. The method of claim 2, wherein each of the plurality of PDSCHs is encoded using a different Redundancy Version (RV) of the same data, the method further comprising determining an index corresponding to each RV based on an indication from a node, wherein the plurality of PDSCHs are soft combined based on the indices.

9. The method of claim 8, wherein an index corresponding to each RV is modulated onto a demodulation reference signal (DMRS) of a corresponding PDSCH of the plurality of PDSCHs.

10. The method of claim 8, further comprising determining an index corresponding to a sequence used to scramble each PDCCH, wherein each index corresponding to the sequence is mapped to an index of a RV of a corresponding PDSCH of the plurality of PDSCHs.

11. The method of claim 8, wherein a size of each RV of the plurality of PDSCHs is different and based on a predefined pattern.

12. The method of claim 1, wherein the plurality of PDCCHs are scrambled using different scrambling sequences.

13. The method of claim 12, further comprising:

decoding control information in a first PDCCH of the plurality of PDCCHs assuming a first scrambling sequence; and

performing a cyclic redundancy check to determine whether the first PDCCH is successfully decoded.

14. The method of claim 12, further comprising:

decoding control information in a first PDCCH of the plurality of PDCCHs assuming a first scrambling sequence, and decoding control information in a second PDCCH of the plurality of PDCCHs assuming a second scrambling sequence, wherein the second PDCCH is received before the first PDCCH.

15. The method of claim 1, wherein the plurality of PDCCHs are encoded using different RVs.

16. The method of claim 1, further comprising:

decoding control information in a first PDCCH of the plurality of PDCCHs assuming a first RV;

performing a cyclic redundancy check to determine whether the first PDCCH is successfully decoded; and

decoding control information in the first PDCCH assuming a second RV, and decoding control information in a second PDCCH in the plurality of PDCCHs assuming the first RV, wherein the second PDCCH is received before the first PDCCH.

17. The method of claim 1, wherein a size of each RV of the plurality of PDCCHs is different and based on a predefined pattern.

18. A method for wireless communication, comprising:

determining, at a base station, a resource allocation within each of a plurality of time intervals for transmitting a respective Physical Downlink Shared Channel (PDSCH) of a plurality of PDSCHs, wherein data in each of the plurality of PDSCHs is the same;

transmitting control information in each of a plurality of Physical Downlink Control Channels (PDCCHs), each PDCCH transmitted during one of the plurality of time intervals, the PDCCHs having identical control information indicating the resource allocation within a respective time interval of the plurality of time intervals; and

transmitting each of the plurality of PDSCHs based on the resource allocation, wherein each of the plurality of PDSCHs is transmitted during one of the plurality of time intervals.

19. The method of claim 18, wherein each of the plurality of PDSCHs is encoded using a different Redundancy Version (RV) of the same data.

20. The method of claim 19, wherein a size of each RV of the plurality of PDSCHs is different and based on a predefined pattern.

21. The method of claim 19, further comprising modulating an index corresponding to each RV on a demodulation reference signal (DMRS) of a corresponding PDSCH of the plurality of PDSCHs.

22. The method of claim 19, further comprising scrambling the plurality of PDCCHs using different scrambling sequences, wherein an index corresponding to each of the sequences is mapped to an index of a RV of a corresponding PDSCH of the plurality of PDSCHs.

23. The method of claim 19, wherein the multiple PDCCHs are encoded using different RVs of a same control packet.

24. The method of claim 23, wherein a size of each RV of the plurality of PDCCHs is different and based on a predefined pattern.

25. The method of claim 18, further comprising: after each of the plurality of time intervals, determining whether at least one of control information or data within a previous time interval was successfully decoded by a User Equipment (UE).

26. The method of claim 25, wherein the determination is based on an indication from the UE.

27. The method of claim 25, wherein the determining comprises:

determining that control information transmitted in a PDCCH transmitted during a first time interval of the plurality of time intervals was not successfully decoded by the UE if neither an acknowledgement nor a negative acknowledgement is received after the first time interval, the method further comprising: transmitting the PDCCH and the PDSCH in a second time interval of the plurality of time intervals based on the determination.

28. The method of claim 25, wherein the determining comprises:

determining that control information transmitted in a PDCCH transmitted during a first time interval is successfully decoded by the UE and data in a PDSCH transmitted during the first time interval is not successfully decoded if a negative acknowledgement is received after the first time interval of the plurality of time intervals, the method further comprising: transmitting the PDSCH in a second time interval of the plurality of time intervals and ceasing transmission of the PDCCH in the second time interval based on the determination.

29. An apparatus for wireless communication, comprising:

at least one antenna; and

a processing system configured to:

monitoring, via the at least one antenna, control information in each of a plurality of Physical Downlink Control Channels (PDCCHs) during different ones of a plurality of time intervals, wherein the PDCCHs contain identical control information indicating resource allocations for receiving one of a plurality of Physical Downlink Shared Channels (PDSCHs) for respective ones of the time intervals, wherein data in each of the plurality of PDSCHs is identical;

soft-combining the plurality of PDCCHs to decode the control information; and

decoding the control information based on soft combining of the plurality of PDCCHs.

30. An apparatus for wireless communication, comprising:

at least one antenna; and

a processing system configured to:

determining a resource allocation within each of a plurality of time intervals for transmitting a respective Physical Downlink Shared Channel (PDSCH) of a plurality of PDSCHs, and wherein data in each of the plurality of PDSCHs is the same;

transmitting control information via the at least one antenna in each of a plurality of Physical Downlink Control Channels (PDCCHs), each PDCCH transmitted during one of the plurality of time intervals, wherein the PDCCHs have the same control information indicating the resource allocation within a respective time interval of the plurality of time intervals; and

transmitting each of the plurality of PDSCHs via the at least one antenna based on the resource allocation, wherein each of the plurality of PDSCHs is transmitted during one of the plurality of time intervals.

Description of the related Art

Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, broadcast, and so on. These systems may employ multiple-access techniques capable of supporting communication with multiple users by sharing the available system resources (e.g., bandwidth and transmit power). Examples of such multiple-access systems include third generation partnership project (3GPP) Long Term Evolution (LTE) systems, LTE-advanced (LTE-a) systems, Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Frequency Division Multiple Access (FDMA) systems, Orthogonal Frequency Division Multiple Access (OFDMA) systems, single carrier frequency division multiple access (SC-FDMA) systems, and time division synchronous code division multiple access (TD-SCDMA) systems.

In some examples, a wireless multiple-access communication system may include several Base Stations (BSs), each capable of supporting communication for multiple communication devices (otherwise known as User Equipments (UEs)) simultaneously. In an LTE or LTE-a network, a set of one or more gnbs may define an evolved node B (eNB). In other examples (e.g., in a next generation, New Radio (NR), or 5G network), a wireless multiple-access communication system may include a number of Distributed Units (DUs) (e.g., Edge Units (EUs), Edge Nodes (ENs), Radio Heads (RHs), intelligent radio heads (SRHs), Transmit Reception Points (TRPs), etc.) in communication with a number of Central Units (CUs) (e.g., Central Nodes (CNs), Access Node Controllers (ANCs), etc.), wherein a set including one or more distributed units in communication with a central unit may define an access node (e.g., NR BS, NR NB, network node, 5G NB, next generation NB (gnb), etc.). The gNB or DU may communicate with the set of UEs on downlink channels (e.g., for transmissions from the base station or to the UEs) and uplink channels (e.g., for transmissions from the UEs to the gNB or DU).

These multiple access techniques have been adopted in various telecommunications standards to provide a common protocol that enables different wireless devices to communicate on a city, country, region, and even global level. NR (e.g., 5G radio access) is an example of an emerging telecommunications standard. NR is an enhanced set of LTE mobile standards promulgated by 3 GPP. It is designed to better support mobile broadband internet access by improving spectral efficiency, reducing costs, improving services, utilizing new spectrum, and better integrating with other open standards using OFDMA with Cyclic Prefix (CP) on Downlink (DL) and Uplink (UL), and to support beamforming, Multiple Input Multiple Output (MIMO) antenna techniques, and carrier aggregation.

However, as the demand for mobile broadband access continues to grow, there is a need for further improvements in NR and LTE technologies. Preferably, these improvements should be applicable to other multiple access techniques and telecommunications standards employing these techniques.

Brief summary

The systems, methods, and devices of the present disclosure each have several aspects, no single one of which is solely responsible for its desirable attributes. Without limiting the scope of the present disclosure as expressed by the claims which follow, some features will now be discussed briefly. After considering this discussion, and particularly after reading the section entitled "detailed description" one will understand how the features of this disclosure provide advantages that include improved communications between access points and stations in a wireless network.

Certain aspects of the present disclosure generally relate to methods and apparatus for soft combining control information.

Certain aspects of the present disclosure provide a method for wireless communication. The method generally includes monitoring control information in each of a plurality of Physical Downlink Control Channels (PDCCHs) during different ones of a plurality of time intervals, wherein the control information in the PDCCHs contains the same control information indicating a resource allocation for receiving one of a plurality of Physical Downlink Shared Channels (PDSCHs) within the respective time interval, wherein data in each of the plurality of PDSCHs is the same; soft-combining the plurality of PDCCHs to decode control information; and decoding the control information based on the soft-combining of the plurality of PDCCHs.

Certain aspects of the present disclosure provide a method for wireless communication. The method generally includes: determining a resource allocation within each of a plurality of time intervals for transmitting a respective PDSCH of a plurality of PDSCHs, wherein data in each of the plurality of PDSCHs is the same; transmitting control information in each of a plurality of PDCCHs, each PDCCH being transmitted during one of a plurality of time intervals, the PDCCHs having identical control information indicating resource allocation within a respective time interval of the plurality of time intervals; and transmitting each of a plurality of PDSCHs based on the resource allocation, wherein each of the plurality of PDSCHs is transmitted during one of a plurality of time intervals.

Certain aspects of the present disclosure provide an apparatus for wireless communication. The apparatus generally includes at least one antenna and a processing system configured to: monitoring, via the at least one antenna, control information in each of a plurality of PDCCHs during different ones of a plurality of time intervals, wherein the PDCCHs contain the same control information indicating a resource allocation for receiving one of a plurality of PDSCHs within the respective time interval, wherein data in each of the plurality of PDSCHs is the same; soft-combining the plurality of PDCCHs to decode control information; and decoding the control information based on the soft-combining of the plurality of PDCCHs.

Certain aspects of the present disclosure provide an apparatus for wireless communication. The apparatus generally includes at least one antenna and a processing system configured to: determining a resource allocation within each of a plurality of time intervals for transmitting a respective PDSCH of a plurality of PDSCHs, wherein data in each of the plurality of PDSCHs is the same; transmitting control information via the at least one antenna in each of a plurality of PDCCHs, each PDCCH being transmitted during one of a plurality of time intervals, the PDCCHs having identical control information indicating resource allocation within a respective time interval of the plurality of time intervals; and transmitting each of a plurality of PDSCHs via the at least one antenna based on the resource allocation, wherein each of the plurality of PDSCHs is transmitted during one of a plurality of time intervals.

Certain aspects of the present disclosure provide an apparatus for wireless communication. The apparatus generally comprises: means for monitoring control information in each of a plurality of PDCCHs during different ones of a plurality of time intervals, wherein the PDCCHs contain the same control information indicating a resource allocation for receiving one of a plurality of PDSCHs within the respective time interval, wherein data in each of the plurality of PDSCHs is the same; means for soft combining the plurality of PDCCHs to decode control information; and means for decoding the control information based on the soft combining of the plurality of PDCCHs.

Certain aspects of the present disclosure provide an apparatus for wireless communication. The apparatus generally comprises: means for determining a resource allocation within each of a plurality of time intervals for transmitting a respective PDSCH of a plurality of PDSCHs, wherein data in each of the plurality of PDSCHs is the same; means for transmitting control information in each of a plurality of PDCCHs, each PDCCH being transmitted during one of a plurality of time intervals, the PDCCHs having identical control information indicating resource allocation within a respective time interval of the plurality of time intervals; and means for transmitting each of a plurality of PDSCHs based on the resource allocation, wherein each of the plurality of PDSCHs is transmitted during one of a plurality of time intervals.

Certain aspects of the present disclosure provide a computer-readable medium having instructions stored thereon for: monitoring control information in each of a plurality of PDCCHs during different ones of a plurality of time intervals, wherein the PDCCHs contain the same control information indicating a resource allocation for receiving one of a plurality of PDSCHs within the respective time interval, wherein data in each of the plurality of PDSCHs is the same; soft-combining the plurality of PDCCHs to decode control information; and decoding the control information based on the soft-combining of the plurality of PDCCHs.

Certain aspects of the present disclosure provide a computer-readable medium having instructions stored thereon for: determining a resource allocation within each of a plurality of time intervals for transmitting a respective PDSCH of a plurality of PDSCHs, wherein data in each of the plurality of PDSCHs is the same; transmitting control information in each of a plurality of PDCCHs, each PDCCH being transmitted during one of a plurality of time intervals, the PDCCHs having identical control information indicating resource allocation within a respective time interval of the plurality of time intervals; and transmitting each of a plurality of PDSCHs based on the resource allocation, wherein each of the plurality of PDSCHs is transmitted during one of a plurality of time intervals.

To the accomplishment of the foregoing and related ends, the one or more aspects comprise the features hereinafter fully described and particularly pointed out in the claims. The following description and the annexed drawings set forth in detail certain illustrative features of the one or more aspects. These features are indicative, however, of but a few of the various ways in which the principles of various aspects may be employed and the present description is intended to include all such aspects and their equivalents.