阅读说明：本技术 用于半开环方案和开环方案的信道状态信息反馈 (Channel state information feedback for semi-open and open loop schemes ) 是由 郝辰曦 J·蒙托霍 张煜 魏超 陈万士 于 2018-06-14 设计创作，主要内容包括：所描述的技术涉及支持用于半开环方案和开环方案的信道状态信息反馈的改进的方法、系统、设备或装置。所描述的技术为用户设备(UE)做准备以确定用于导出信道质量指示(CQI)的开环传输方案、半开环传输方案或闭环传输方案。在确定的开环传输方案的情况下,UE可以选择与时间偏移值和预编码器循环粒度值相对应的传输方案。UE可以确定用于信道状态信息(CSI)报告的时间偏移值、预编码器循环粒度值和预编码矩阵指示符(PMI)中的一者或多者,以及相应地生成CQI。另外,UE可以在CSI报告中包括所确定的值以指示用于CQI导出的传输方案。基于CQI,基站可以确定传输方案以及相应地执行链路自适应。(The described techniques provide for a User Equipment (UE) to determine an open-loop, semi-open-loop, or closed-loop transmission scheme for deriving a Channel Quality Indication (CQI). in the case of a determined open-loop transmission scheme, the UE may select a transmission scheme corresponding to a time offset value and a precoder cycling granularity value.the UE may determine or more of the time offset value, the precoder cycling granularity value, and a Precoding Matrix Indicator (PMI) for a Channel State Information (CSI) report and generate a CQI accordingly.)

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

determining at least of a time offset value or a precoder cycling granularity value between two or more antenna ports associated with a transmission scheme for Channel Quality Information (CQI);

generating the CQI based at least in part on at least of the determined time offset value or the determined precoder cycling granularity value, and

the generated CQI is transmitted in a Channel State Information (CSI) report.

2. The method of claim 1, further comprising:

determining the transmission scheme for CQI, wherein the transmission scheme for CQI comprises an th transmission scheme or a second transmission scheme, and determining at least of the time offset value or the precoder cycling granularity value comprises:

determining that the time offset value is equal to zero, or the precoder cycling granularity value is equal to a non-cycling indicator, or a combination thereof, wherein the determined transmission scheme is the th transmission scheme.

3. The method of claim 1, further comprising:

determining the transmission scheme for CQI, wherein the transmission scheme for CQI comprises an th transmission scheme or a second transmission scheme, and determining at least of the time offset value or the precoder cycling granularity value comprises:

determining that the time offset value is greater than zero, or the precoder cycling granularity value is equal to a non-cycling indicator, or a combination thereof; or

Determining that the time offset value is equal to zero, or that the precoder cycling granularity value is not equal to a non-cycling indicator, or a combination thereof, wherein the determined transmission scheme is the second transmission scheme.

4. The method of claim 1, wherein at least of the time offset value or the precoder cycling granularity value is determined based at least in part on a precoder granularity associated with a data channel, a UE mobility parameter, a delay spread, or a combination thereof.

5. The method of claim 1, wherein at least of the time offset value or the precoder cycling granularity value is configured via a Medium Access Control (MAC) Control Element (CE), or a Radio Resource Control (RRC) message, or Downlink Control Information (DCI).

6. The method of claim 1, wherein determining at least of the time offset value or the precoder cycling granularity value comprises:

selecting the time offset value from a predetermined set of time offset values; and

selecting the precoder cycling granularity value from a predetermined set of precoder cycling granularity values.

7. The method of claim 6, wherein the predetermined set of precoder cycling granularity values includes a multiple of a number of Resource Blocks (RBs) and a non-cycling indicator, and a maximum multiple of the number of RBs is less than or equal to a minimum frequency granularity for CSI feedback, and the non-cycling indicator is equal to zero.

8. The method of claim 6, wherein the predetermined set of precoder cycling granularity values includes an portion of a number of Resource Blocks (RBs) used for CSI feedback and an acyclic indicator, and the acyclic indicator is equal to .

9. The method of claim 6, further comprising:

determining at least of the predetermined set of time offset values and the predetermined set of precoder cycling granularity values based at least in part on a capability associated with the UE, or

Receiving the predetermined set of time offset values and the predetermined set of precoder cycling granularity values via a Medium Access Control (MAC) Control Element (CE), or a Radio Resource Control (RRC) message, or Downlink Control Information (DCI).

10. The method of claim 1, wherein generating the CQI comprises:

determining a Precoding Matrix Indicator (PMI) reporting scheme based at least in part on a quantity associated with the CSI report, wherein the PMI reporting scheme includes a full PMI report, a partial PMI report, or a no PMI report; and

deriving the CQI based at least in part on the determined PMI reporting scheme, a Rank Indicator (RI), or a combination thereof.

11. The method of claim 1, wherein the two or more antenna ports comprise an th set of CSI reference signal (CSI-RS) ports and a second set of CSI-RS ports, and generating the CQI comprises applying the time offset value to the second set of CSI-RS ports relative to the th set of CSI-RS ports.

12. The method of claim 1, further comprising:

transmitting, in the CSI report, at least of the time offset value or the precoder cycling granularity value with the generated CQI.

13. The method of claim 12, wherein transmitting at least of the time offset value and the precoder cycling granularity value comprises jointly encoding the time offset value or the precoder cycling granularity value with a Rank Indicator (RI) within the CSI report or jointly encoding the time offset value or the precoder cycling granularity value within the CSI report.

14. The method of claim 1, further comprising determining the transmission scheme for CQI, wherein the transmission scheme for CQI comprises th transmission scheme or a second transmission scheme, wherein the th transmission scheme comprises a closed loop transmission scheme and the second transmission scheme comprises a semi-open loop transmission scheme or an open loop transmission scheme.

15. The method of claim 1, wherein generating the CQI comprises:

applying an th precoder to a th Resource Block Group (RBG), and applying a second precoder to a second RBG, wherein a size of the th RBG and a size of the second RBG are equal to the determined precoder cycling granularity value.

16, a method for wireless communication at a base station, comprising:

receiving Channel Quality Information (CQI) in a Channel State Information (CSI) report, the CQI based at least in part on at least of a time offset value between two or more antenna ports or a precoder cycling granularity value;

determining a transmission scheme for generating the CQI based at least in part on at least of the time offset value or the precoder cycling granularity value, and

performing link adaptation based at least in part on the determined transmission scheme and the CSI report.

17. The method of claim 16, wherein generating the CQI comprises:

determining a Precoding Matrix Indicator (PMI) reporting scheme, wherein the PMI reporting scheme includes a full PMI report, a partial PMI report, or a no PMI report; and

deriving the CQI based at least in part on the determined PMI reporting scheme.

18. The method of claim 16, further comprising:

receiving at least of the time offset value or the precoder cycling granularity value, wherein the CQI hypothesis is associated with at least of the received time offset value or the received precoder cycling granularity value.

19. The method of claim 16, further comprising:

configuring at least of the time offset value or the precoder cycling granularity value via a Medium Access Control (MAC) Control Element (CE), or a Radio Resource Control (RRC) message, or Downlink Control Information (DCI).

20. The method of claim 16, wherein the transmission scheme comprises an th transmission scheme or a second transmission scheme, and determining the transmission scheme for generating the CQI comprises:

identifying that the time offset value is greater than zero, or the precoder cycling granularity value is equal to a non-cycling indicator, or a combination thereof, wherein the determined transmission scheme is the second transmission scheme.

21. The method of claim 16, wherein the transmission scheme comprises an th transmission scheme or a second transmission scheme, and determining the transmission scheme for generating the CQI comprises:

identifying that the time offset value is equal to zero, or that the precoder cycling granularity value is not equal to a non-cycling indicator, or a combination thereof, wherein the determined transmission scheme is the second transmission scheme.

22. The method of claim 16, wherein the transmission scheme comprises an th transmission scheme or a second transmission scheme, and determining the transmission scheme for generating the CQI comprises:

identifying that the time offset value is greater than zero, or that the precoder cycling granularity value is not equal to a non-cycling indicator, or a combination thereof, wherein the determined transmission scheme is the second transmission scheme.

23. The method of claim 16, further comprising:

the indication of the predetermined set of time offset values and the indication of the predetermined set of precoder cycling granularity values are transmitted via a Medium Access Control (MAC) Control Element (CE), or a Radio Resource Control (RRC) message, or Downlink Control Information (DCI).

24. The method of claim 23, wherein the predetermined set of precoder cycling granularity values includes a multiple of a number of Resource Blocks (RBs) and a non-cycling indicator, and wherein a maximum multiple of the number of RBs is less than or equal to a minimum frequency granularity for CSI feedback and the non-cycling indicator is equal to zero.

25. The method of claim 23, wherein the predetermined set of precoder cycling granularity values includes an portion of a number of Resource Blocks (RBs) for CSI feedback and an acyclic indicator, and wherein the acyclic indicator is equal to .

26. The method of claim 16, wherein the CQI is based at least in part on a Precoding Matrix Indicator (PMI) reporting scheme and at least of the time offset value or the precoder cycling granularity value, and the CSI report includes a Rank Indicator (RI), a Precoding Matrix Indicator (PMI), the time offset value, the precoder cycling granularity value, or a combination thereof, and the time offset value and the precoder cycling granularity value are jointly encoded with the RI within the CSI report.

27. The method of claim 16, wherein the two or more antenna ports comprise an th set of CSI reference signal (CSI-RS) ports and a second set of CSI-RS ports, and generating the CQI comprises applying the time offset value to the second set of CSI-RS ports relative to the th set of CSI-RS ports.

28. The method of claim 16, wherein receiving the CQI comprises:

receiving the CQI having a precoder applied to an th Resource Block Group (RBG) and a second precoder applied to a second RBG, wherein a size of the th RBG and a size of the second RBG are equal to the precoder cycling granularity value.

29, an apparatus for wireless communication, comprising:

a processor;

a memory in electronic communication with the processor; and

instructions stored in the memory, and executable by the processor to cause the apparatus to:

determining at least of a time offset value or a precoder cycling granularity value between two or more antenna ports associated with a transmission scheme for Channel Quality Information (CQI);

generating the CQI based at least in part on at least of the determined time offset value or the determined precoder cycling granularity value, and

the generated CQI is transmitted in a Channel State Information (CSI) report.

30, an apparatus for wireless communication, comprising:

a processor;

a memory in electronic communication with the processor; and

instructions stored in the memory, and executable by the processor to cause the apparatus to:

receiving Channel Quality Information (CQI) in a Channel State Information (CSI) report, the CQI based at least in part on at least of a time offset value between two or more antenna ports or a precoder cycling granularity value;

determining a transmission scheme for generating the CQI based at least in part on at least of the time offset value or the precoder cycling granularity value, and

performing link adaptation based at least in part on the determined transmission scheme and the CSI report.

Technical Field

The following relates generally to wireless communications, and more particularly to channel state information feedback for semi-open loop and open loop schemes.

Background

Examples of such multiple-access systems include Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Frequency Division Multiple Access (FDMA) systems, and Orthogonal Frequency Division Multiple Access (OFDMA) systems (e.g., Long Term Evolution (LTE) systems or New Radio (NR) systems). Wireless multiple-access communication systems may include multiple base stations or access network nodes, each of which simultaneously supports communication for multiple communication devices, which may otherwise be referred to as User Equipments (UEs).

In some cases , these various options may lead to ambiguity in determining whether Channel Quality Information (CQI) is based on an open-loop (or semi-open-loop) transmission scheme or a closed-loop transmission scheme, as well as ambiguity in assumptions made in calculating an associated PMI report.

Disclosure of Invention

The described techniques provide for a User Equipment (UE) to determine an open-loop, semi-open-loop, or closed-loop transmission scheme for deriving a Channel Quality Indication (CQI). in the case of a determined open-loop transmission scheme, the UE may select a transmission scheme corresponding to a time offset value and a precoder cycling granularity value.for example, the transmission scheme may be a Small Cyclic Delay Diversity (SCDD) scheme, a Resource Block Group (RBG) level precoder cycling scheme, or a combination thereof.

A method of wireless communication at a UE is described that may include determining at least of a time offset value or a precoder cycling granularity value between two or more antenna ports associated with a transmission scheme for CQI, generating the CQI based on at least of the determined time offset value or the determined precoder cycling granularity value, and sending the generated CQI in a CSI report.

The instructions are executable by the processor to cause the apparatus to determine at least of a time offset value or a precoder cycling granularity value between two or more antenna ports associated with a transmission scheme for CQI, generate the CQI based on at least of the determined time offset value or the determined precoder cycling granularity value, and send the generated CQI in a CSI report.

Another apparatus for wireless communication at a UE is described that may include means for determining at least of a time offset value or a precoder cycling granularity value between two or more antenna ports associated with a transmission scheme for CQI, means for generating the CQI based on at least of the determined time offset value or the determined precoder cycling granularity value, and means for sending the generated CQI in a CSI report.

A non-transitory computer-readable medium is described that stores code for wireless communication at a UE, the code may include instructions executable by a processor to determine at least of a time offset value or a precoder cycling granularity value between two or more antenna ports associated with a transmission scheme for a CQI, generate the CQI based on at least of the determined time offset value or the determined precoder cycling granularity value, and send the generated CQI in a CSI report.

examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, units, or instructions for determining the transmission scheme for CQI, wherein the transmission scheme for CQI comprises a th transmission scheme or a second transmission scheme, and determining at least of the time offset value or the precoder cycling granularity value comprises determining that the time offset value may be equal to zero, or the precoder cycling granularity value may be equal to a non-cycling indicator, or a combination thereof, wherein the determined transmission scheme may be a th transmission scheme.

examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for determining the transmission scheme for CQI, wherein the transmission scheme for CQI comprises a th transmission scheme or a second transmission scheme, and determining at least of the time offset value or the precoder cycling granularity value comprises determining that the time offset value may be greater than zero, or the precoder cycling granularity value may be equal to a non-cycling indicator, or a combination thereof, or determining that the time offset value may be equal to zero, or the precoder cycling granularity value may not be equal to a non-cycling indicator, or a combination thereof, wherein the determined transmission scheme may be the second transmission scheme.

In examples of the methods, apparatus, and non-transitory computer-readable media described herein, at least of the time offset value or the precoder cycling granularity value may be determined based on a precoder granularity associated with a data channel, a UE mobility parameter, a delay spread, or a combination thereof.

In examples of the methods, apparatus, and non-transitory computer-readable media described herein, at least of the time offset value or the precoder cycling granularity value may be configured via a Medium Access Control (MAC) Control Element (CE), or a Radio Resource Control (RRC) message, or Downlink Control Information (DCI).

In examples of the methods, apparatuses, and non-transitory computer-readable media described herein, determining at least of the time offset value or the precoder cycling granularity value may comprise operations, features, units, or instructions to select the time offset value from a predetermined set of time offset values and to select the precoder cycling granularity value from a predetermined set of precoder cycling granularity values.

In examples of the methods, apparatus, and non-transitory computer-readable media described herein, the predetermined set of precoder cycling granularity values includes a multiple of a number of Resource Blocks (RBs) and a non-cycling indicator, and a maximum multiple of the number of RBs may be less than or equal to a minimum frequency granularity for CSI feedback, and the non-cycling indicator may be equal to zero.

In examples of the methods, apparatus, and non-transitory computer readable media described herein, the predetermined set of precoder cycling granularity values includes a portion of a number of Resource Blocks (RBs) for CSI feedback and an acyclic indicator, and the acyclic indicator may be equal to .

examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for determining at least of the predetermined set of time offset values and the predetermined set of precoder cycling granularity values based on capabilities associated with the UE, or receiving the predetermined set of time offset values and the predetermined set of precoder cycling granularity values via a MAC CE, or RRC message, or DCI.

In examples of the methods, apparatus, and non-transitory computer-readable media described herein, generating the CQI may include operations, features, means, or instructions for determining a PMI reporting scheme based on a quantity associated with the CSI report, wherein the PMI reporting scheme includes a full PMI report, a partial PMI report, or a no PMI report, and deriving the CQI based on the determined PMI reporting scheme, a Rank Indicator (RI), or a combination thereof.

In examples of the methods, apparatus, and non-transitory computer-readable media described herein, the two or more antenna ports include a th set of CSI-reference signal (CSI-RS) ports and a second set of CSI-RS ports, and generating the CQIs includes applying the time offset value to the second set of CSI-RS ports relative to the th set of CSI-RS ports.

examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for sending, in the CSI report, at least of the time offset value or the precoder cycling granularity value with the generated CQI.

In examples of the methods, apparatus, and non-transitory computer-readable media described herein, transmitting at least of the time offset value and the precoder cycling granularity value may comprise operations, features, units, or instructions to jointly encode the time offset value or the precoder cycling granularity value with RI within the CSI report, or jointly encode the time offset value or the precoder cycling granularity value within the CSI report.

examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, means, or instructions for determining the transmission scheme for CQI, wherein the transmission scheme for CQI comprises th transmission scheme or a second transmission scheme, wherein the th transmission scheme comprises a closed-loop transmission scheme and the second transmission scheme comprises a semi-open-loop transmission scheme or an open-loop transmission scheme.

In examples of the methods, apparatus, and non-transitory computer readable media described herein, generating the CQI includes operations, features, units, or instructions to apply a precoder to a RBG and a second encoder to a second RBG, wherein a size of the RBG and a size of the second RBG may be equal to the determined precoder cycling granularity value.

A method of wireless communication at a base station is described, which may include receiving CQI in a CSI report, the CQI based on at least of a time offset value or a precoder cycling granularity value between two or more antenna ports, determining a transmission scheme for generating the CQI based on at least of the time offset value or the precoder cycling granularity value, and performing link adaptation based on the determined transmission scheme and the CSI report.

The instructions are executable by the processor to cause the apparatus to receive a CQI in a CSI report, the CQI being based on at least of a time offset value or a precoder cycling granularity value between two or more antenna ports, determine a transmission scheme for generating the CQI based on at least of the time offset value or the precoder cycling granularity value, and perform link adaptation based on the determined transmission scheme and the CSI report.

Another apparatus for wireless communication at a base station is described that may include means for receiving CQI in a CSI report, the CQI based on at least of a time offset value or a precoder cycling granularity value between two or more antenna ports, means for determining a transmission scheme for generating the CQI based on at least of the time offset value or the precoder cycling granularity value, and means for performing link adaptation based on the determined transmission scheme and the CSI report.

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 to receive CQI in a CSI report, the CQI based on at least of a time offset value or a precoder cycling granularity value between two or more antenna ports, determine a transmission scheme for generating the CQI based on at least of the time offset value or the precoder cycling granularity value, and perform link adaptation based on the determined transmission scheme and the CSI report.

In examples of the methods, apparatus, and non-transitory computer-readable media described herein, generating the CQI may include operations, features, units, or instructions for determining a PMI reporting scheme, wherein the PMI reporting scheme includes full PMI reporting, partial PMI reporting, or no PMI reporting, and deriving the CQI based on the determined PMI reporting scheme.

examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions to receive at least of the time offset value or the precoder cycling granularity value, wherein the CQI may be assumed to be associated with at least of the received time offset value or the received precoder cycling granularity value.

examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions to configure at least of the time offset value or the precoder cycling granularity value via a MAC CE, or RRC message, or DCI.

In examples of the methods, apparatus, and non-transitory computer-readable media described herein, the transmission scheme comprises a th transmission scheme or a second transmission scheme, and determining the transmission scheme for generating the CQI comprises identifying that the time offset value may be greater than zero, or the precoder cycling granularity value may be equal to a non-cycling indicator, or a combination thereof, wherein the determined transmission scheme may be the second transmission scheme.

In examples of the methods, apparatus, and non-transitory computer-readable media described herein, the transmission scheme comprises a th transmission scheme or a second transmission scheme, and determining the transmission scheme for generating the CQI comprises identifying that the time offset value may be equal to zero, or the precoder cycling granularity value may not be equal to a non-cycling indicator, or a combination thereof, wherein the determined transmission scheme may be the second transmission scheme.

In examples of the methods, apparatus, and non-transitory computer-readable media described herein, the transmission scheme comprises a th transmission scheme or a second transmission scheme, and determining the transmission scheme for generating the CQI comprises identifying that the time offset value may be greater than zero, or the precoder cycling granularity value may not be equal to a non-cycling indicator, or a combination thereof, wherein the determined transmission scheme may be the second transmission scheme.

examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for transmitting, via a MAC CE, or RRC message, or DCI, an indication of a predetermined set of time offset values and an indication of a predetermined set of precoder cycling granularity values.

In examples of the methods, apparatus, and non-transitory computer-readable media described herein, the set of predetermined precoder cycling granularity values includes a multiple of a number of RBs and a non-cycling indicator, and wherein a maximum multiple of the number of RBs may be less than or equal to a minimum frequency granularity for CSI feedback and the non-cycling indicator may be equal to zero.

In examples of the methods, apparatus, and non-transitory computer readable media described herein, the predetermined set of precoder cycling granularity values includes a portion of a number of RBs for CSI feedback and an acyclic indicator, and wherein the acyclic indicator may be equal to .

In examples of the methods, apparatus, and non-transitory computer-readable media described herein, the CQI may be based on a PMI reporting scheme and at least of the time offset value or the precoder cycling granularity value, and the CSI report includes an RI, a PMI, the time offset value, the precoder cycling granularity value, or a combination thereof, and the time offset value and the precoder cycling granularity value may be jointly encoded with the RI within the CSI report.

In examples of the methods, apparatus, and non-transitory computer-readable media described herein, the two or more antenna ports include a th set of CSI-RS ports and a second set of CSI-RS ports, and generating the CQIs includes applying the time offset value to the second set of CSI-RS ports relative to the th set of CSI-RS ports.

In examples of methods, apparatus, and non-transitory computer-readable media described herein, receiving the CQI may include operations, features, units, or instructions to receive the CQI having a th precoder applied to a th RBG and a second precoder applied to a second RBG, wherein a size of the th RBG and a size of the second RBG may be equal to the precoder cycling granularity value.

Methods of wireless communication are described that may include determining a transmission scheme for CQI, wherein the transmission scheme includes th transmission scheme or a second transmission scheme, determining a time offset value and a precoder cycling granularity value associated with the determined transmission scheme, generating the CQI based at least in part on the determined transmission scheme, and transmitting the identified time offset value and precoder cycling granularity value with the generated CQI in a CSI report.

An apparatus for wireless communication is described that may include means for determining a transmission scheme for a CQI, wherein the transmission scheme includes a th transmission scheme or a second transmission scheme, means for determining a time offset value and a precoder cycling granularity value associated with the determined transmission scheme, means for generating the CQI based at least in part on the determined transmission scheme, and means for sending the identified time offset value and precoder cycling granularity value with the generated CQI in a CSI report.

Another apparatus for wireless communication is described that may include a processor, a memory in electronic communication with the processor, and instructions stored in the memory, the instructions operable to cause the processor to determine a transmission scheme for CQI, wherein the transmission scheme includes a th transmission scheme or a second transmission scheme, determine a time offset value and a precoder cycling granularity value associated with the determined transmission scheme, generate the CQI based at least in part on the determined transmission scheme, and transmit the identified time offset value and precoder cycling granularity value with the generated CQI in a CSI report.

A non-transitory computer-readable medium for wireless communication may include instructions operable to cause a processor to determine a transmission scheme for CQI, wherein the transmission scheme includes an th transmission scheme or a second transmission scheme, determine a time offset value and a precoder cycling granularity value associated with the determined transmission scheme, generate the CQI based at least in part on the determined transmission scheme, and send the identified time offset value and precoder cycling granularity value with the generated CQI in a CSI report.

In examples of the method, apparatus, and non-transitory computer-readable medium described above, determining the time offset value and the precoder cycling granularity value includes determining that the time offset value may be equal to zero and that the precoder cycling granularity value may be equal to a non-cycling indicator, where the determined transmission scheme may be a th transmission scheme.

In examples of the method, apparatus, and non-transitory computer-readable medium described above, determining the time offset value and the precoder cycling granularity value includes determining that the time offset value may be greater than zero and that the precoder cycling granularity value may be equal to a non-cycling indicator, where the determined transmission scheme may be a second transmission scheme including SCDD.

In the examples of the method, apparatus, and non-transitory computer-readable medium described above, determining the time offset value and the precoder cycling granularity value comprises determining that the time offset value may be equal to zero and that the precoder cycling granularity value may not be equal to a non-cycling indicator, where the determined transmission scheme may be a second transmission scheme that includes RBG-level precoder cycling in the examples of the method, apparatus, and non-transitory computer-readable medium described above, determining the time offset value and the precoder cycling granularity value comprises determining that the time offset value may be greater than zero and that the precoder cycling granularity value may not be equal to a non-cycling indicator, where the determined transmission scheme may be a second transmission scheme that includes SCDD and RBG-level precoder cycling.

examples of the methods, apparatus and non-transitory computer readable media described above may also include processes, features, units or instructions for selecting the precoder cycling granularity value from a predetermined set of precoder cycling granularity values.

In examples of the method, apparatus, and non-transitory computer readable medium described above, the predetermined set of precoder cycling granularity values comprises a portion of a number of RBs for CSI feedback and an acyclic indicator, and wherein the acyclic indicator may be equal to examples of the method, apparatus, and non-transitory computer readable medium described above may further comprise processes, features, elements, or instructions to receive the predetermined set of time offset values and the predetermined set of precoder cycling granularity values via a MAC CE, or RRC message, or DCI.

The generating the CQI in examples of the method, apparatus, and non-transitory computer readable medium described above may include determining a PMI reporting scheme, and wherein the PMI reporting scheme includes full PMI reporting, partial PMI reporting, or no PMI reporting examples of the method, apparatus, and non-transitory computer readable medium described above may also include processes, features, units, or instructions for deriving the CQI based at least in part on the determined PMI reporting scheme.

examples of the methods, apparatuses, and non-transitory computer-readable media described above may also include processes, features, units, or instructions for deriving the CQI based at least in part on the RI, the PMI matrix, the second PMI matrix, the determined time offset value, and the precoder cycling granularity value being equal to a non-cycling indicator, wherein the PMI reporting scheme includes full PMI reporting.

The examples of the methods, apparatuses, and non-transitory computer-readable media described above may also include processes, features, means, or instructions for determining that a CSR may be configured examples of the methods, apparatuses, and non-transitory computer-readable media described above may also include processes, features, means, or instructions for deriving the CQI based at least in part on the CSR.

examples of the methods, apparatuses, and non-transitory computer-readable media described above may also include processes, features, units, or instructions for deriving the CQI based at least in part on the RI, components of the th or th PMI matrices, and the determined time offset value and the precoder cycling granularity value, wherein the PMI reporting scheme includes partial PMI reporting.

The examples of the methods, apparatuses, and non-transitory computer-readable media described above may also include processes, features, means, or instructions for determining that a CSR may be configured examples of the methods, apparatuses, and non-transitory computer-readable media described above may also include processes, features, means, or instructions for deriving the CQI based at least in part on the CSR.

examples of the methods, apparatuses, and non-transitory computer-readable media described above may also include processes, features, units, or instructions for deriving the CQI based at least in part on an RI and the determined time offset value and the precoder cycling granularity value, wherein the PMI reporting scheme includes no PMI reporting.

The examples of the method, apparatus, and non-transitory computer-readable medium described above may also include processes, features, units, or instructions to determine that a CSR may be configured, the examples of the method, apparatus, and non-transitory computer-readable medium described above may also include processes, features, units, or instructions to derive the cqi based at least in part on the CSR, the sending the identified time offset value and precoder cycle granularity value includes, in the examples of the method, apparatus, and non-transitory computer-readable medium described above, jointly encoding the identified time offset value and precoder cycle granularity value with an RI within the CSI report.

In examples of the method, apparatus, and non-transitory computer-readable medium described above, transmitting the identified time offset value and precoder cycling granularity value includes jointly encoding the identified time offset value and precoder cycling granularity value within the CSI report in examples of the method, apparatus, and non-transitory computer-readable medium described above, the th transmission scheme comprises a closed-loop transmission scheme and the second transmission scheme comprises a semi-open-loop transmission scheme or an open-loop transmission scheme.

A method of wireless communication is described that may include receiving an RI, a PMI, a time offset value, and a precoder cycling granularity value and a CQI in a CSI report, determining a transmission scheme for generating the CQI based on the received time offset value and precoder cycling granularity value, wherein the transmission scheme includes th or second transmission scheme, and performing link adaptation based at least in part on the determined transmission scheme and the CSI report.

An apparatus for wireless communication is described that may include means for receiving an RI, a PMI, a time offset value, and a precoder cycling granularity value with a CQI in a CSI report, means for determining a transmission scheme for generating the CQI based on the received time offset value and precoder cycling granularity value, wherein the transmission scheme includes an th transmission scheme or a second transmission scheme, and means for performing link adaptation based at least in part on the determined transmission scheme and the CSI report.

Another apparatus for wireless communication is described that may include a processor, a memory in electronic communication with the processor, and instructions stored in the memory, the instructions operable to cause the processor to receive an RI, a PMI, a time offset value, and a precoder cycling granularity value and a CQI in a CSI report, determine a transmission scheme for generating the CQI based on the received time offset value and precoder cycling granularity value, wherein the transmission scheme includes a transmission scheme or a second transmission scheme, and perform link adaptation based at least in part on the determined transmission scheme and the CSI report.

A non-transitory computer-readable medium for wireless communication may include instructions operable to cause a processor to receive an RI, a PMI, a time offset value, and a precoder cycling granularity value and a CQI in a CSI report, determine a transmission scheme for generating the CQI based on the received time offset value and precoder cycling granularity value, wherein the transmission scheme includes an th transmission scheme or a second transmission scheme, and perform link adaptation based at least in part on the determined transmission scheme and the CSI report.

In examples of the method, apparatus, and non-transitory computer-readable medium described above, determining the transmission scheme for generating the CQI includes identifying that the time offset value may be equal to zero and the precoder cycling granularity value may be equal to a non-cycling indicator, where the determined transmission scheme may be a th transmission scheme.

In the examples of the method, apparatus, and non-transitory computer-readable medium described above, determining the transmission scheme for generating the CQI includes identifying that the time offset value may be greater than zero and the precoder cycling granularity value may be equal to a non-cycling indicator, wherein the determined transmission scheme may be a second transmission scheme including SCDD in the examples of the method, apparatus, and non-transitory computer-readable medium described above, determining the transmission scheme for generating the CQI includes identifying that the time offset value may be equal to zero and the precoder cycling granularity value may not be equal to a non-cycling indicator, wherein the determined transmission scheme may be a second transmission scheme including RBG level precoder cycling.

In examples of the method, apparatus, and non-transitory computer-readable medium described above, determining the transmission scheme for generating the CQI includes identifying that the time offset value may be greater than zero and the precoder cycling granularity value may not be equal to a non-cyclic indicator, where the determined transmission scheme may be a second transmission scheme including SCDD and RBG level precoder cycling.

In the examples of the method, apparatus, and non-transitory computer-readable medium described above, the predetermined set of precoder cycling granularity values comprises a multiple of a number of RBs and a non-cycling indicator, and wherein a maximum multiple of the number of RBs may be less than or equal to a minimum frequency granularity for CSI feedback, and the non-cycling indicator may be equal to zero in the examples of the method, apparatus, and non-transitory computer-readable medium described above, the predetermined set of precoder cycling granularity values comprises a portion of the number of RBs for CSI feedback and a non-cycling indicator, and wherein the non-cycling indicator may be equal to .

In examples of the methods, apparatus, and non-transitory computer-readable media described above, the CQI may be based at least in part on a PMI reporting scheme and the time offset value and the precoder cycling granularity value in examples of the methods, apparatus, and non-transitory computer-readable media described above, the time offset value and the precoder cycling granularity value may be jointly encoded with the RI within the CSI report.

In the examples of the method, apparatus, and non-transitory computer-readable medium described above, the time offset value and the precoder cycling granularity value may be jointly encoded within the CSI report in the examples of the method, apparatus, and non-transitory computer-readable medium described above, the th transmission scheme comprises a closed-loop transmission scheme and the second transmission scheme comprises a semi-open-loop transmission scheme or an open-loop transmission scheme.

Drawings

Fig. 1 illustrates an example of a wireless communication system, in accordance with aspects of the present disclosure;

fig. 2 illustrates an example of a wireless communication system, in accordance with aspects of the present disclosure;

FIG. 3 illustrates an example of a process flow, in accordance with aspects of the present disclosure;

fig. 4 and 5 show block diagrams of wireless devices, in accordance with aspects of the present disclosure;

FIG. 6 illustrates a block diagram of a User Equipment (UE) communications manager, in accordance with aspects of the present disclosure;

FIG. 7 shows a block diagram of a system including a device, in accordance with aspects of the present disclosure;

fig. 8 and 9 show block diagrams of wireless devices, in accordance with aspects of the present disclosure;

fig. 10 shows a block diagram of a base station communication manager, in accordance with aspects of the present disclosure;

FIG. 11 shows a block diagram of a system including a device, in accordance with aspects of the present disclosure; and

fig. 12-16 show flow diagrams illustrating methods in accordance with aspects of the present disclosure.

Detailed Description

A wireless communication system may support communication between a base station and User Equipment (UE). In particular, the wireless communication system may support downlink transmissions from the base station to the UE and uplink transmissions from the UE to the base station. The downlink transmission may include data, control signals, and reference signals. For a given uplink transmission on an antenna, different reference signal waveforms may be multiplexed (i.e., using Frequency Division Multiplexing (FDM) and/or Time Division Multiplexing (TDM)) over a set of frequency resources. For example, a base station may identify respective single-carrier reference signal streams to send to a UE and may precode the streams for transmission.

In addition, different reporting schemes may be used for open-loop PMI reporting, including full PMI reporting, partial PMI reporting, and no PMI reporting.

The UE may then calculate an associated CQI using the selected transmission scheme, which may be derived based on the PMI matrix at steps, depending on whether the PMI reporting technique is a full PMI reporting technique, a partial PMI reporting technique, or a no PMI reporting technique, the UE may indicate to the base station the calculated CQI and corresponding values of a time offset value (e.g., τ) and a precoder cycling granularity value (e.g., M) associated with the transmission scheme, in, for example, a Channel State Information (CSI) report, the base station may adjust its transmission scheme and perform link adaptation accordingly, in cases, joint coding may be used to encode the time offset value and the precoder cycling granularity value in the CSI report.

These and other features are further illustrated and described at by and with reference to various block diagrams, transmission schemes, and process flows aspects of the present disclosure are further illustrated and described at by and with reference to apparatus diagrams, system diagrams, and flow charts related to CSI feedback for semi-open and open loop schemes.

Fig. 1 shows an example of a wireless communication system 100, the wireless communication system 100 including a base station 105, a UE115, and a core network 130, in examples, the wireless communication system 100 may be a Long Term Evolution (LTE) network, an LTE advanced (LTE-a) network, or a New Radio (NR) network in cases, the wireless communication system 100 may support enhanced wideband communication, ultra-reliable (i.e., mission critical) communication, low latency communication, and communication with low cost and low complexity devices.

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.

UEs 115 may be dispersed throughout the wireless communication system 100, and UEs 115 may be stationary or mobile. UE115 may also be referred to as a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable terminology. The UE115 may also be a cellular phone, a Personal Digital Assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a tablet, a laptop, a cordless phone, a personal electronic device, a handheld device, a personal computer, a Wireless Local Loop (WLL) station, an internet of things (IoT) device, an internet of everything (IoE) device, a Machine Type Communication (MTC) device, an appliance, an automobile, and so forth.

In cases, the UE115 may also be able to communicate directly with other UEs 115 (e.g., using a peer-to-peer (P2P) protocol or a device-to-device (D2D) protocol.) or more UEs 115 in a group of UEs 115 that utilize D2D communications may be within the geographic coverage area 110 of a cell other UEs 115 in such a group may be outside the coverage area 110 of a cell or otherwise unable to receive transmissions from the base station 105. in cases, a group of UEs 115 that communicate via D2D communications may utilize a -to-many (1: M) system in which each UE115 transmits to every other UE115 in the group. in cases, the base station 105 facilitates scheduling of resources for D2D communications. in other cases, D2D communications are performed independently of the base station 105.

UEs 115 such as MTC or IoT devices may be low cost or low complexity devices and may provide automated communication between machines (i.e., machine to machine (M2M) communication M2M or MTC may refer to data communication technologies that allow devices to communicate with each other or with a base station without human intervention. for example, M2M or MTC may refer to communication from devices that integrate sensors or meters to measure or capture and relay information to a central server or application that may make full use of or present the information to personnel interacting with the program or application UEs 115 may be designed to collect or enable automated behavior of machines.examples of applications for MTC devices include smart meters, inventory monitoring, water level monitoring, device monitoring, healthcare monitoring, wildlife monitoring, weather and geological events, fleet management and tracking, remote security sensing, physical access control, and business billing based transactions.

In some cases , the MTC device may operate using half-duplex (one-way) communication at a reduced peak rate the MTC device may also be configured to enter a power-saving "deep sleep" mode when not engaged in active communication in some cases , the MTC or IoT device may be designed to support mission critical functions, and the wireless communication system may be configured to provide ultra-reliable communication to these functions.

Base stations 105 may communicate with the core network 130 and with each other, for example, the base stations 105 may interact with the core network 130 over backhaul links 132 (e.g., S1, S2, etc.), the base stations 105 may communicate with each other directly or indirectly (e.g., through the core network 130) over backhaul links 134 (e.g., X1, X2, etc.), the base stations 105 may perform wireless configuration and scheduling for communication with the UEs 115 or may operate under the control of a base station controller (not shown), in examples, the base stations 105 may be macro cells, small cells, hot spots, etc., the base stations 105 may also be referred to as evolved node Bs (eNBs) 105.

The base stations 105 may be connected to a core network 130 through an S1 interface the core network may be an Evolved Packet Core (EPC) which may include at least Mobility Management Entities (MME), at least serving gateways (S-GW) and at least Packet Data Network (PDN) gateways (P-GW). the MME may be a control node that handles signaling between the UE115 and the EPC.

At least of the 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 multiple UEs 115 through multiple other access network transport entities, each of which may be examples of intelligent radio heads or transmit/receive points (TRPs), in configurations, the various functions of each access network entity or base station 105 may be distributed across various network devices, such as radio heads and access network controllers, or incorporated in a single network device, such as base station 105.

The wireless communication system 100 may use a frequency band from 700MHz to 2600MHz (2.6GHz) to operate in the Ultra High Frequency (UHF) frequency region, but some networks (e.g., Wireless Local Area Networks (WLANs)) may use frequencies as high as 5GHz, this region may also be referred to as a decimeter band, since its wavelength range is about from decimeters to meters in length UHF waves may propagate primarily at line of sight and may be blocked by building and environmental features however, these waves may penetrate walls sufficiently to provide service to UEs 115 located indoors, transmission of UHF waves may be characterized by smaller antennas and shorter distances (e.g., less than 100 kilometers) than transmission of smaller frequencies (and longer waves) using the High Frequency (HF) or Very High Frequency (VHF) portions of the spectrum, in cases, the wireless communication system 100 may also utilize the very high frequency (f) portion of the spectrum (e.g., from 25GHz to 300GHz) this region may also be referred to as a millimeter wave band, which may be more attenuated from EHF to EHF 115, which may be about shorter wavelengths, and may be more attenuated by EHF 115, in the near infrared (e.g., shorter) than EHF) and EHF, which may be used in the case, which may be more closely-proximate to the UE 115.

Thus, the wireless communication system 100 may support millimeter wave (mmW) communication between the UE115 and the base station 105. Devices operating in mmW or EHF bands may have multiple antennas to allow beamforming. That is, the base station 105 may use multiple antennas or antenna arrays for beamforming operations for directional communications with the UEs 115. Beamforming, which may also be referred to as spatial filtering or directional transmission, is a signal processing technique that may be used at a transmitter (e.g., base station 105) to shape or steer the overall antenna beam in the direction of a target receiver (e.g., UE 115). This may be achieved by combining elements in an antenna array in such a way that transmitted signals at a particular angle undergo constructive interference while other signals undergo destructive interference.

For example, the base station 105 may have an antenna array with multiple rows and columns of antenna ports that the base station 105 may use for beamforming in its communications with the UEs 115.

In cases, the antennas of the base station 105 or the UE115 may be located within or multiple antenna arrays that may support beamforming or MIMO operation or multiple base station antennas or antenna arrays may be collocated at an antenna assembly such as an antenna tower in cases, the antennas or antenna arrays associated with the base station 105 may be located in different geographic locations the base station 105 may use multiple antennas or antenna arrays for beamforming operations for directional communications with the UE 115.

In cases, the wireless communication system 100 may be a packet-based network operating according to a layered protocol stack communication at a bearer or Packet Data Convergence Protocol (PDCP) layer may be IP-based in cases, a Radio Link Control (RLC) layer may perform packet segmentation and reassembly to communicate on logical channels, a Medium Access Control (MAC) layer may perform priority processing, and multiplexing of logical channels to transport channels, the MAC layer may also provide retransmission at the MAC layer using hybrid automatic repeat request (HARQ) to improve link efficiency.

The time interval in LTE or NR can be expressed as a multiple of the basic time unit (which may be T)_sA sample period of 1/30,720,000 seconds). The time resource may be 10 milliseconds (T) in terms of length_f＝307200T_s) The sub-frame may be further divided into two 0.5 millisecond slots, each of which contains 6 or 7 modulation symbol periods (depending on the length of the prefix to the cyclic prefix of each symbol), excluding the cyclic prefix, each symbol contains 2048 sample periods at the sub-frame may be the smallest scheduling unit, also referred to as a TTI.

A resource block may contain 12 consecutive subcarriers in the frequency domain, and 7 consecutive Orthogonal Frequency Division Multiplexing (OFDM) symbols in the time domain (1 slot), or 84 resource elements for a normal cyclic prefix in each OFDM symbol.

The wireless communication system 100 may support operation over multiple cells or carriers, which may be characterized as Carrier Aggregation (CA) or multi-carrier operation.

In cases, the wireless communication system 100 may utilize an enhanced component carrier (eCC). the eCC may be characterized by or more of the following, including wider bandwidth, shorter symbol duration, shorter TTI, and modified control channel configuration, in cases, the 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). the eCC may also be configured for use in unlicensed spectrum or shared spectrum (where more than operators are allowed to use the spectrum). the eCC characterized by wider bandwidth may include or more segments that may be utilized by UEs 115 that are unable to monitor the entire bandwidth or preferably use limited bandwidth (e.g., to save power).

In cases, an eCC may utilize a different symbol duration than other CCs, which may include using a reduced symbol duration compared to symbol durations of other CCs, shorter symbol durations are associated with increased subcarrier spacing, devices utilizing an eCC, such as a UE115 or a base station 105, may transmit wideband signals (e.g., 20, 40, 60, 80MHz, etc.) with a reduced symbol duration (e.g., 16.67 microseconds), a TTI in an eCC may consist of or more symbols, a TTI duration (that is, the number of symbols in a TTI) may be variable in cases.

The flexibility of eCC symbol duration and subcarrier spacing may allow the use of eccs across multiple spectra, in examples, NR shared spectrum may increase frequency utilization and spectral efficiency, particularly through vertical (e.g., across frequency) and horizontal (e.g., across time) sharing of resources.

In some cases , the wireless communication system 100 may utilize licensed and unlicensed wireless spectrum bands.A wireless communication system 100 may employ LTE licensed assisted access (LTE-LAA) or LTE unlicensed (LTE U) wireless access technologies, or NR technologies in unlicensed bands such as the 5GHz Industrial, scientific, and medical (ISM) bands.when operating in unlicensed wireless spectrum bands, wireless devices such as base stations 105 and UEs 115 may employ listen-before-talk (LBT) procedures to ensure that the channel is free before transmitting data.A CA configuration based on a CC operating in the licensed band may be employed in the unlicensed bands.

The wireless communication system 100 may be classified as an open-loop scheme, a semi-open-loop scheme, and a closed-loop scheme.an open loop may refer to transmission performed by a transmitter without feedback from a receiver.a closed loop may refer to a scheme in which a transmitter receives feedback from a receiver and performs transmission accordingly.in cases, wireless communication systems (e.g., LTE, enhanced full-dimensional MIMO (eFD-MIMO), and/or New Radio (NR) wireless communication systems) may or may not support a specific transmission scheme for unicast transmission via a Physical Downlink Shared Channel (PDSCH). A base station 105-a of the wireless communication system 100 may employ different techniques for such PDSCH transmission.A transmission scheme of the type may include closed-loop transmission in which data and reference signals may be transmitted using the same precoding matrix.in a scheme of the type, demodulation of data at UE115-a may not require knowledge of the precoding matrix used at the transmitter.A transmission scheme of the second type may include open-loop and semi-open-loop transmission in which data and demodulation reference signals (DMRS) may or may not be transmitted using the same precoding matrix in a precoding layer.

In cases precoding information fed back by the receiver may be indicated by a combination of two PMIs, the PMI may have long-term or wideband properties and may be referred to as W1, and the second PMI may have short-term or partial-band properties and may be referred to as W2 for the full PMI reporting technique both W1 and W2 may be reported similarly to the closed loop technique, in the partial PMI reporting technique W1 (i.e., i1) may be reported while precoder cycling may be performed on W2 (i.e., i2) in the other case portion of W1 and portion of W2 (e.g., W11 or W12 portion of W1) may be reported, and then in the case of (W12, W2) or (W2) the precoding cycling may be performed on W3968624 or 6865, W2, in this case the precoding information may be reported via the codebook subset of the UE — , since the precoding information may be reported by the UE-105 a subset.

For example, in the case of full PMI reporting techniques, SCDD may be applied based on selected W1 and W2, or in the case of partial PMI reporting and no PMI reporting, CQI calculation may be based on an assumption of unreported partial precoder usage, e.g., based on RBG-level cycling, SCDD, or a combination of RBG-level cycling and SCDD.

The wireless communication system 100 may support CSI feedback for a semi-open loop scheme and an open loop scheme, for example, the UE115 may determine an open loop transmission scheme, a semi-open loop transmission scheme, or a closed loop transmission scheme for deriving CQI.

Fig. 2 illustrates an example of a wireless communication system 200 in accordance with aspects of the present disclosure. The wireless communication system 200 includes a base station 105-a, which may be an example of the base station 105 as described with reference to fig. 1. The wireless communication system 200 also includes a UE115-a, which may be an example of the UE115 as described with reference to fig. 1. The UE115-a may be configured with a transmitter 205 to transmit signals to the base station 105-a, and the base station 105-a may be configured with a receiver 210 to receive signals from the UE 115-a.

For example, the UE115-a may report parameters τ and M to indicate to the base station 105-a preferred transmission scheme (such as TS1 or TS 2). τ may refer to the time offset between virtual antennas as applied in the SCDD scheme, and M may represent a precoder cycling granularity value.

UE115-a may select τ and M from a corresponding set of values configured by base station 105-a via, for example, RRC signaling, MAC Control Element (CE) signaling, or Downlink Control Information (DCI). in cases, τ and M may be predefined according to a specification, or may be based on the capabilities of UE 115-a. for example, UE115-a may select τ e {0,0.4} microseconds, or alternatively, τ e {0,0.2,0.4,0.8} microseconds. UE115-a may select M from a defined set of values, wherein the set may be, for example, defined for of the two methods.in the th method, M ═ {1,2,4, CSI feedback size } RB (or, also referred to as an acyclic indicator). these candidate values for M may represent the number of RBs if there is no rb.additionally or alternatively, the granularity value may include a multiple of RBs and a acyclic indicator, wherein the maximum number of RBs may be equal to the number of RBs (or, for example, if the precoder is equal to a maximum number of RBs) in the case of RBs, the cyclic feedback granularity may be equal to 0, the smallest granularity of RBs) in case, the feedback granularity may be equal to the number of RBs 35, if the CSI feedback granularity is equal to the precoder is equal to zeroEach portion of the number of RBs, where the non-cyclic indicator is equal to 1, indicates that the cyclic granularity is the number of RBs used for CSI feedback. In this case, the set of precoder cycling granularity values may be equal to

Where the unit is the CSI feedback size. Accordingly, the granularity of the cycle may be equal to the selected portion multiplied by the configured CSI feedback size (e.g.,

). In this case, the candidate values for M may be parts of the CSI feedback resolution, where 1 denotes the case of no precoder cycling.

Additionally or alternatively, determining the time offset and precoder cycling granularity value may be based on other configurations or measurements. For example, the time offset and precoder cycling granularity values may be based on precoder granularity of the data channel, and/or include measurements of UE mobility (e.g., UE mobility parameters) or delay spread.

Based on the respective values of τ and M, UE115-a may generate CQI and indicate CQI accordingly using the selected transmission scheme. For example, if τ is 0 and M is equal to the aperiodic indicator (CSI feedback size), the UE115-a may use a closed-loop transmission scheme. If τ >0, and M is equal to the CSI feedback size, then the UE115-a may use the SCDD scheme. If τ is 0 and M is less than (or typically not equal to) the CSI feedback size, then UE115-a may use an RBG-level precoder cycling scheme. If τ >0, and M is less than (or generally not equal to) the CSI feedback size, then UE115-a may use a scheme that includes a combination of SCDD and RBG level precoder cycling.

based on the respective values of τ and M, UE115-a may perform CQI calculation based on whether the PMI reporting technique is a full PMI reporting technique, a partial PMI reporting technique, or a PMI-free reporting technique, for a full PMI report, CQI may be derived based on PMI matrix W1, PMI matrix W2 may be reported with a value for τ, and where M may be equal to CSI feedback size, for a partial PMI, CQI may be derived based on parts or component matrices of W1 or W1 (e.g., W11 or W12) with the reporting values for τ and M, for a non-PMI report, CQI may be derived based on a codebook subset restriction with the reporting values for τ and M, in cases, a codebook subset restriction may apply to any of the cases of full PMI reporting, partial PMI reporting, and non-PMI reporting, in cases, a codebook subset restriction may be applied to any of cases such as in full PMI reporting, partial PMI reporting, and non-PMI reporting cases such as [ 1,15, and 15.

In a th technique for encoding τ and M in CSI reports, τ and M may be jointly encoded with a Rank Indicator (RI). in this case, if there are A bits for τ, B bits for M, and C bits for RI, the corresponding A + B + C bits may be input to the channel encoder.

In an example of the case of full PMI reporting, the UE115-a may use a particular precoder for CQI computation, where D represents an SCDD matrix that gradually changes at the subcarrier level.

τ,Δθ＝2π×τ×f_scs, (1)

To produce:

x(k)＝D(k)×W₁×W₂×s_k, (2)

wherein the content of the first and second substances,

here, W₁Is a beam matrix (i.e., PMI matrix) which is given by:

here, W₂Is a beam selection and in-phase matrix, as may be determined by the UE115-a through selection, given by:

here, θ_iniCan be considered as the initial phase of the SCDD for a given subband. Theta_iniThe value of (A) can be from 0,

Pi andgiven in cases (e.g., type II codebook), W₂Can be given by:

W₂＝[p_r,iexp(jkθ_r,i)]^T, (6)

which contains an amplitude term p for the beam i and the polarization r_r,iAnd a phase term θ for the beam i and the polarization r_r,iIn cases, θ_r,iMay be based on phase modulated (e.g., 8PSK) symbols.

A second example is provided for the case of partial PMI reporting or no PMI reporting. In the example of the case of partial PMI reporting or no PMI reporting, the UE115-a may use a specific precoder for CQI calculation, where D represents the SCDD matrix. The phase variation across tones may depend on the time offset, which is given by:

τ,Δθ＝2π×τ×f_scs, (7)

to produce:

x(k)＝D(k)×W₁×W₂(n,i)×s_k, (8)

wherein the content of the first and second substances,

here, W₁May be based on wideband PMI reporting and may be given by:

here, W₂(n, i) may change, for example, every M RBs. In this example, W is given only by the following equation₂：

Can be circulated, whereinn is 1,2,3,4 and i is 1,2,3, 4. Here, an example for M ═ 1 is provided. Linking k to:

and

the final precoding can be generated:

RB	0	1	2	3	4	5	6	7	...
										eii of (a)	1	1	1	1	2	2	2	2	...
n	1	2	3	4	1	2	3	4	...

Additionally or alternatively, the precoder cycling may be further limited based on the codebook subset.

Fig. 3 shows an example of a process flow 300 in accordance with aspects of the present disclosure in some examples of process flow 300 may implement aspects of wireless communication system 100 for example, a process flow includes a UE 115-b and a base station 105-b, which may be examples of respective devices described with reference to fig. 1-4.

At 305, the base station 105-b may transmit a predetermined value to the UE115 b, and the UE115 b may receive the predetermined value from the base station 105b in cases, the predetermined set of precoder cycling granularity values may include a multiple of the number of RBs used for CSI feedback, or a portion of the number of RBs used for CSI feedback.

At 310, the UE 115-b may determine a transmission scheme for CQI, in cases, the transmission scheme may include a th transmission scheme or a second transmission scheme, in cases, the th transmission scheme may be a closed-loop transmission scheme and the second transmission scheme may be a semi-open-loop transmission scheme or an open-loop transmission scheme, in cases, the second transmission scheme may be determined to be a SCDD scheme, an RBG level precoder cycling scheme, or a combination of both.

At 315, the UE 115-b may determine a time offset and a precoder cycling granularity value based on the transmission scheme determined at 310. The time offset value may be selected from a predetermined set of time offset values, as may have been received from the base station 105-b at 305. The precoder cycling granularity value may be selected from a predetermined set of precoder cycling granularity values, as may have been received from the base station 105-b at 305.

In cases, based on the transmission scheme determined at 310, the UE 115-b may determine that the time offset value is, for example, equal to zero, and the precoder cycling granularity value is equal to the non-cycling indicator in cases, based on the second transmission scheme being determined as the SCDD scheme at 310, the UE 115-b may determine that the time offset value is, for example, greater than zero, and the precoder cycling granularity value is equal to the non-cycling indicator in cases, based on the second transmission scheme being determined as the RBG level precoder cycling scheme at 310, the UE 115-b may determine that the time offset value is, for example, equal to zero, and the precoder cycling granularity value is not equal to the non-cycling indicator in cases, based on the second transmission scheme being determined as a combination of the SCDD scheme and the RBG level precoder cycling scheme at 310, the UE 115-b may determine that the time offset value is, for example, greater than zero, and the precoder cycling granularity value is not equal to the non-cycling indicator.

At 320, UE 115-b may generate CQI based on the transmission scheme determined at 310 generating CQI may include determining a PMI reporting scheme, wherein the PMI reporting scheme includes at least full PMI reports, partial PMI reports, and no PMI reports at in some cases, determining the PMI reporting scheme may be based on a quantity associated with CSI reporting at in some cases, generating CQI may include applying a th precoder to an RBG and applying a second precoder to a second RBG, wherein a size of the th RBG and a size of the second RBG are equal to the determined precoder cycling granularity value.

The CQI may be derived based on, for example, components of a th PMI matrix or a th PMI matrix, and the determined time offset value and precoder cycling granularity value if the PMI reporting scheme includes a partial PMI report.

At 325, the UE 115-b may send a CSI report with CQI to the base station 105-b, and the base station 105-b may receive the CSI report with CQI from the UE 115-b the CSI report may include a PMI, a time offset value, and a precoder cycling granularity value, as the UE 115-b has determined at, for example, 315.

The transmission schedule may be used by the UE 115-b to generate a CQI for a further step, e.g., based on the received time offset value and precoder cycling granularity value the base station 105-b may identify the transmission schedule and the second transmission schedule as values corresponding to the SCDD scheme, the RBG level precoder cycling scheme, or a combination thereof, to be determined, e.g., by the UE115 in accordance with step 315.

At 335, the base station 105-b may perform link adaptation. The link adaptation may be based on the transmission scheme determined at 330 and the CSI report received at 325.

Fig. 4 shows a block diagram 400 of a wireless device 405, according to aspects of the disclosure, the wireless device 405 may be an example of aspects of a UE115 as described herein, the wireless device 405 may include a receiver 410, a UE communication manager 415, and a transmitter 420, the wireless device 405 may also include a processor, various ones of these components may communicate with one another (e.g., via or more buses).

The receiver 410 may receive information such as packets associated with various information channels (e.g., control channels, data channels, and information related to CSI feedback for semi-open and open-loop schemes, etc.), user data, or control information. Information may be communicated to other components of the device. The receiver 410 may be an example of aspects of the transceiver 735 described with reference to fig. 7. The receiver 410 may utilize a single antenna or a set of antennas.

The UE communications manager 415 may be an example of aspects of the UE communications manager 715 described with reference to fig. 7. at least of the UE communications manager 415 and/or its various subcomponents 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 of at least of the UE communications manager 415 and/or its various subcomponents may be performed by a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a field programmable array (FPGA) or other programmable logic device, discrete or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in this disclosure.

In examples, UE communication manager 415 and/or at least of its various subcomponents may be separate and distinct components in accordance with aspects of the present disclosure, in or more other hardware components including, but not limited to, I/O components, transceivers, network servers, other computing devices, or more other components described in the present disclosure, or combinations thereof.

The UE communications manager 415 may determine at least of a time offset value or precoder cycling granularity value between two or more antenna ports associated with the determined transmission scheme, generate a CQI based on at least of the determined time offset value and precoder cycling granularity value, and send the generated CQI in a CSI report, in cases, the UE communications manager 415 may send at least of the time offset value or precoder cycling granularity value and the generated CQI in a CSI report, in cases, the UE communications manager 415 may determine a transmission scheme for the CQI, wherein the transmission scheme for the CQI may include a th transmission scheme or a second transmission scheme.

The transmitter 420 may transmit signals generated by other components of the device in examples, the transmitter 420 may be collocated with the receiver 410 in a transceiver module.

Fig. 5 shows a block diagram 500 of a wireless device 505, in accordance with aspects of the present disclosure, the wireless device 505 may be an example of aspects of the wireless device 405 or UE115 as described with reference to fig. 4, the wireless device 505 may include a receiver 510, a UE communication manager 515, and a transmitter 520, the wireless device 505 may also include a processor, various ones of these components may communicate with one another (e.g., via or more buses).

Receiver 510 may receive information such as packets associated with various information channels (e.g., control channels, data channels, and information related to CSI feedback for semi-open and open-loop schemes, etc.), user data, or control information. Information may be communicated to other components of the device. The receiver 510 may be an example of aspects of the transceiver 735 described with reference to fig. 7. Receiver 510 may utilize a single antenna or a set of antennas.

The UE communications manager 515 may be an example of aspects of the UE communications manager 715 described with reference to fig. 7. UE communications manager 515 may also include a transmission scheme component 525, a time offset and precoder granularity manager 530, a CQI component 535, and a UE CSI reporting manager 540.

Transmission scheme component 525 may determine a transmission scheme for CQI, where the transmission scheme may include a th transmission scheme or a second transmission scheme in cases, a th transmission scheme may be a closed loop transmission scheme (e.g., TS1) and the second transmission scheme may be a semi-open loop transmission scheme or an open loop transmission scheme (e.g., TS 2).

The time offset and precoder granularity manager 530 may determine at least of a time offset value or a precoder cycling granularity value, select the time offset value from a predetermined set of time offset values, and select the precoder cycling granularity value from the predetermined set of precoder cycling granularity value in examples, the predetermined set of precoder cycling granularity values may include parts of the number of RBs used for CSI feedback and a non-cycling indicator, where the non-cycling indicator is equal to in cases, determining the time offset value and the precoder cycling granularity value may include determining the time offset value to be equal to zero and the precoder cycling granularity value to be equal to the non-cycling indicator, where the determined transmission scheme is a th transmission scheme in cases, determining at least of the time offset value or the precoder cycling granularity value may include determining the time offset value to be greater than zero and the precoder cycling granularity value to be equal to the non-cycling indicator, where the determined transmission scheme is a second transmission scheme.

Additionally or alternatively, determining at least of the time offset value or the precoder cycling granularity value may include determining that the time offset value is equal to zero and the precoder cycling granularity value is not equal to the non-cycling indicator, where the determined transmission scheme is the second transmission scheme in examples, determining at least of the time offset value or the precoder cycling granularity value includes determining that the time offset value is greater than zero and the precoder cycling granularity value is not equal to the non-cycling indicator, where the determined transmission scheme is the second transmission scheme.

In other examples, CQI component 535 may derive CQI based on the RI, the PMI matrix or a component of the PMI matrix, the determined time precoder, and the determined time precoder value, wherein the CQI component 535 may derive the CQI based on the RI, the PMI matrix, the second PMI matrix, the determined time precoder value, and the determined precoder cycling granularity value equal to the non-cyclic indicator, wherein the CQI component 535 may derive the CQI based on the determined PMI reporting scheme, or may derive the CQI based on the RI, the PMI matrix, the second PMI matrix, the determined time precoder value, and the determined precoder cycling granularity value equal to the non-cyclic indicator, wherein the CQI component 535 may derive the CQI based on the CSR.

The transmitter 520 may transmit signals generated by other components of the device in examples, the transmitter 520 may be collocated with the receiver 510 in a transceiver module, for example, the transmitter 520 may be an example of aspects of the transceiver 735 described with reference to fig. 7.

Fig. 6 shows a block diagram 600 of a UE communications manager 615, according to aspects of the present disclosure the UE communications manager 615 may be an example of aspects of the UE communications manager 415, the UE communications manager 515, or the UE communications manager 715 described with reference to fig. 4, 5, and 7 the UE communications manager 615 may include a transmission scheme component 620, a time offset and precoder granularity manager 625, a CQI component 630, a UE CSI report manager 635, a predetermined value manager 640, a CSR component 645, and a coding manager 650 the various ones of these modules may communicate directly or indirectly with one another (e.g., via or more buses).

Transmission scheme component 620 may determine a transmission scheme for CQI, where the transmission scheme for CQI may include an th transmission scheme or a second transmission scheme in some cases the th transmission scheme includes a closed loop transmission scheme and the second transmission scheme includes a semi-open loop transmission scheme or an open loop transmission scheme.

The time offset and precoder granularity manager 625 may determine at least of a time offset value or a precoder cycling granularity value between two or more antenna ports associated with a transmission scheme for CQI, in some cases the two or more antenna ports include a th set of CSI-RS ports and a second set of CSI-RS ports, in some cases the time offset value and/or precoder cycling granularity value may be determined based on a precoder granularity, a UE mobility parameter, a delay spread, or a combination thereof associated with a data channel, in some cases the time offset value and/or precoder cycling granularity value is configured via a MAC CE, RRC message, or DCI, the time offset and precoder granularity manager 865625 may select the time offset value from a predetermined set of time offset values and select the precoder cycling granularity value from the predetermined set of precoder cycling granularity values, in examples the predetermined cycling granularity includes a portion of the number of RBs for CSI feedback and a non-cycling indicator, and the non-cycling granularity manager 8652 may determine the precoder cycling granularity value to be equal to a time offset value in 4835 examples, and the precoder cycling granularity manager may determine the precoder cycling granularity value to be equal to a time offset value in 3625 case the precoder may determine the precoder cycling granularity value to be equal to zero, wherein the transmission scheme includes a transmission scheme, wherein the predetermined transmission scheme is equal to transmit a time offset value or the precoder is equal to transmit a time offset value, wherein the precoder is equal to transmit a time offset value, wherein transmission scheme is equal to transmit a transmission scheme, wherein transmission scheme is equal to at least 3625, wherein.

Additionally or alternatively, determining at least of the time offset value or the precoder cycling granularity value may include determining that the time offset value is equal to zero and the precoder cycling granularity value is not equal to the non-cycling indicator, wherein the determined transmission scheme is a second transmission scheme that includes RBG-level precoder cycling in some examples , determining at least of the time offset value or the precoder cycling granularity value includes determining that the time offset value is greater than zero and the precoder cycling granularity value is not equal to the non-cycling indicator, wherein the determined transmission scheme is the second transmission scheme that includes SCDD and RBG-level precoder cycling.

In some cases at , generating CQI may include applying the time offset value to a second set of CSI-RS ports relative to a th set of CSI-RS ports, in some cases at , generating CQI may include determining a PMI reporting scheme based on a quantity associated with the CSI reports, wherein the PMI reporting scheme may include a full PMI report, a partial PMI report, or no PMI report, in some examples at , CQI may be derived by CQI component 630 based on the determined PMI reporting scheme, or may be derived based on RI, a PMI matrix, a second PMI matrix, the determined time offset value, and the determined precoder cycling granularity value equal to a non-cyclic indicator, wherein the PMI reporting scheme includes a full PMI report.

In some cases, , determining at least of the time offset value or the precoder cycling granularity value includes selecting the time offset value from the predetermined set of time offset values and selecting the precoder cycling granularity value from the predetermined set of precoder cycling granularity values, in some cases, , the predetermined set of time offset values and the predetermined set of precoder cycling granularity values may be determined based on capabilities associated with the UE, in some cases, , the predetermined set of precoder cycling granularity values includes multiples of RBs and non-cycling indicators, and a maximum multiple of the number of RBs is less than or equal to a minimum frequency granularity for feedback, and the predetermined set of precoder cycling granularity values includes a number of RBs, in some cases, , the number of non-cycling indicators is equal to a number of RBs, in some cases, , the predetermined set of precoder cycling granularity values includes a number of RBs, and the number of non-cycling indicators is equal to zero.

CSR component 645 may determine that CSR is configured, coding manager 650 may jointly code the time offset value or precoder cycling granularity value with RI within the CSI report, in cases, CSR component 645 jointly codes the time offset value or precoder cycling granularity value within the CSI report.

Fig. 7 shows a schematic diagram of a system 700 including a device 705 in accordance with aspects of the present disclosure the device 705 may be an example of a wireless device 405, a wireless device 505, or a UE115 as described above, for example, with reference to fig. 4 and 5, or include components of a wireless device 405, a wireless device 505, or a UE115 the device 705 may include components for two-way voice and data communications including components for sending and receiving communications including a UE communications manager 715, a processor 720, a memory 725, software 730, a transceiver 735, an antenna 740, and an I/O controller 745, these components may be in electronic communication via or multiple buses (e.g., bus 710) the device 705 may communicate wirelessly with or multiple base stations 105.

Processor 720 may include intelligent hardware devices (e.g., general purpose processors, DSPs, Central Processing Units (CPUs), microcontrollers, ASICs, FPGAs, programmable logic devices, discrete or transistor logic components, discrete hardware components, or any combination thereof). in some cases, processor 720 may be configured to operate a memory array using a memory controller.

Memory 725 may include Random Access Memory (RAM) and Read Only Memory (ROM), memory 725 may store computer-readable, computer-executable software 730 including instructions that, when executed, cause the processor to perform various functions described herein, in some cases at memory 725 may contain a basic input/output system (BIOS) or the like capable of controlling basic hardware or software operations, such as interaction with peripheral components or devices.

Software 730 may include code for implementing aspects of the disclosure, including code to support CSI feedback for semi-open loop and open loop schemes software 730 may be stored in a non-transitory computer-readable medium such as a system memory or other memory in cases, software 730 may not be executed directly by a processor, but may cause a computer (e.g., when compiled and executed) to perform functions described herein.

The transceiver 735 may be in bidirectional communication via one or more antennas, wired links, or wireless links, as described above, for example, the transceiver 735 may represent a wireless transceiver and may be in bidirectional communication with another wireless transceiver the transceiver 735 may also include a modem to modulate packets and provide the modulated packets to an antenna for transmission and to demodulate packets received from the antenna at in some cases the wireless device may include a single antenna 740, however, in cases the device may have more than antennas 740 that can send or receive multiple wireless transmissions simultaneously.

I/O controller 745 may manage input and output signals for device 705. I/O controller 745 may also manage peripheral devices that are not integrated into device 705. in some cases I/O controller 745 may represent a physical connection or port to an external peripheral device

I/O controller 745 may represent or interact with a modem, keyboard, mouse, touch screen, or similar device in other cases I/O controller 745 may be implemented as part of of the processor in cases a user may interact with device 705 via I/O controller 745 or via hardware components controlled by I/O controller 745 in cases.

Fig. 8 shows a block diagram 800 of a wireless device 805 in accordance with aspects of the disclosure, the wireless device 805 may be an example of aspects of a base station 105 as described herein, the wireless device 805 may include a receiver 810, a base station communications manager 815, and a transmitter 820, the wireless device 805 may also include a processor, various ones of which may communicate with one another (e.g., via or more buses).

Receiver 810 can receive information such as packets associated with various information channels (e.g., control channels, data channels, and information related to CSI feedback for semi-open and open-loop schemes, etc.), user data, or control information. Information may be communicated to other components of the device. The receiver 810 may be an example of aspects of the transceiver 1135 described with reference to fig. 11. Receiver 810 can utilize a single antenna or a set of antennas.

The base station communications manager 815 may be an example of aspects of the base station communications manager 1115 described with reference to fig. 11. the base station communications manager 815 and/or at least of its various subcomponents 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 of the base station communications manager 815 and/or at least of its various subcomponents may be performed by a general purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in this disclosure.

In other examples, at least of base station communication manager 815 and/or its various subcomponents or more other hardware components including, but not limited to, I/O components, transceivers, network servers, other computing devices, or more other components described in this disclosure, or combinations thereof may be combined with or more other hardware components in accordance with aspects of this disclosure.

The base station communication manager 815 may receive a CQI in a CSI report, the CQI based on at least of a time offset value and a precoder cycling granularity value between two or more antenna ports, the base station communication manager 815 may determine a transmission scheme for generating the CQI based on at least of the received time offset value or precoder cycling granularity value, and perform link adaptation based on the determined transmission scheme and the CSI report, in some cases , the transmission scheme may include a transmission scheme or a second transmission scheme.

In examples, transmitter 820 may be collocated with receiver 810 in a transceiver module.

Fig. 9 shows a block diagram 500 of a wireless device 905, in accordance with aspects of the disclosure, the wireless device 905 may be an example of aspects of the wireless device 805 or base station 105 as described with reference to fig. 8, the wireless device 905 may include a receiver 910, a base station communications manager 915, and a transmitter 920, the wireless device 905 may also include a processor, various ones of these components may communicate with one another (e.g., via or more buses).

Receiver 910 can receive information such as packets associated with various information channels (e.g., control channels, data channels, and information related to CSI feedback for semi-open and open-loop schemes, etc.), user data, or control information. Information may be communicated to other components of the device. The receiver 910 may be an example of aspects of the transceiver 1135 described with reference to fig. 11. Receiver 910 can utilize a single antenna or a set of antennas.

The base station communications manager 915 may be an example of aspects of the base station communications manager 1115 described with reference to fig. 11. The base station communications manager 915 may also include a base station CSI reporting manager 925, a transmission scheme manager 930, and a link adaptation component 935.

The base station CSI reporting manager 925 may receive, in a CSI report, a CQI based on at least of a time offset value and a precoder cycling granularity value between two or more antenna ports, in some cases the CQI may be based on a PMI reporting scheme and the time offset value and precoder cycling granularity value, and the CSI report may include an RI, a PMI, a time offset value, a precoder cycling granularity value, or a combination thereof, in some cases the time offset value or precoder cycling granularity value may be jointly coded within the CSI report, in some cases the time offset value or precoder cycling granularity value may be a precoder jointly coded with the RI within the CSI report, in some cases the CQI may include receiving a CQI having a applied to a RBG and a second RBG applied to the second RBG, wherein the size of the RBG and the size of the second RBG are equal to the precoder cycling granularity value, in some cases the base station CSI reporting manager 925 may receive the CQI or at least one of the precoder cycling granularity value and precoder cycling granularity value assumed to be associated with the time precoder .

The transmission scheme manager 930 may determine a transmission scheme for generating CQI based on at least of a time offset value or a precoder cycling granularity value, in cases, the transmission scheme may include a -th transmission scheme or a second transmission scheme, in cases, the -th transmission scheme includes a closed-loop transmission scheme and the second transmission scheme includes a semi-open-loop transmission scheme or an open-loop transmission scheme, determining a transmission scheme for generating CQI may include identifying that the time offset value is greater than zero and the precoder cycling granularity value is equal to a non-cyclic indicator, wherein the determined transmission scheme is the second transmission scheme, in examples, determining a transmission scheme for generating CQI may include identifying that the time offset value is equal to zero and the precoder cycling granularity value is not equal to the non-cyclic indicator, wherein the determined transmission scheme is the second transmission scheme, in cases, generating CQI may include determining a PMI reporting scheme, wherein the PMI reporting scheme may include full PMI reporting, partial PMI reporting or no reporting, and deriving the CQI based on the determined transmission scheme is the CSI 35 , in 355636 cases, the CSI-reporting scheme includes applying the PMI reporting port to a second group of CSI-RS-RS ports, and generating the CSI-RS ports.

In examples, determining a transmission scheme for generating CQI may include identifying that a time offset value is greater than zero and that a precoder cycling granularity value is not equal to a non-cycling indicator, where the determined transmission scheme is a second transmission scheme.

Transmitter 920 may transmit signals generated by other components of the device in examples, transmitter 920 may be collocated with receiver 910 in a transceiver module.

Fig. 10 shows a block diagram 1000 of a base station communications manager 1015 according to aspects of the present disclosure, the base station communications manager 1015 may be an example of aspects of the base station communications manager 1115 described with reference to fig. 8, 9, and 11, the base station communications manager 1015 may include a base station CSI report manager 1020, a transmission scheme manager 1025, a link adaptation component 1030, a transmission scheme component 1035, and a predetermined value indicator 1040, various ones of these modules may communicate with one another directly or indirectly (e.g., via or more buses).

The base station CSI reporting manager 1020 may receive a CQI in a CSI report, the CQI based on at least of a time offset value and a precoder cycling granularity value between two or more antenna ports, in some cases the CQI may be based on a PMI reporting scheme and the time offset value and precoder cycling granularity value, and the CSI report may include an RI, a PMI, a time offset value, a precoder cycling granularity value, or a combination thereof, in some cases the time offset value or precoder cycling granularity value may be jointly coded within the CSI report, in some cases the time offset value or precoder cycling granularity value may be a precoder jointly coded with the RI within the CSI report, in some cases the CQI may include receiving a CQI having a applied to a RBG and a second RBG applied to the second RBG, wherein the size of the RBG and the size of the second RBG are equal to the precoder cycling granularity value, in some cases the base station CSI reporting manager 1020 may receive the CQI of the time offset value or precoder cycling granularity value, wherein the precoder cycling offset value is assumed to be associated with at least the time precoder cycling granularity value of .

The transmission scheme manager 1025 may determine a transmission scheme for generating CQI based on at least of a time offset value and a precoder cycling granularity value, in cases, the transmission scheme may include a th transmission scheme or a second transmission scheme, in cases, the th transmission scheme includes a closed-loop transmission scheme and the second transmission scheme includes a semi-open-loop transmission scheme or an open-loop transmission scheme, determining a transmission scheme for generating CQI may include identifying that the time offset value is greater than zero and the precoder cycling granularity value is equal to a non-cyclic indicator, wherein the determined transmission scheme is the second transmission scheme, in examples, determining a transmission scheme for generating CQI may include identifying that the time offset value is equal to zero and the precoder cycling granularity value is not equal to the non-cyclic indicator, wherein the determined transmission scheme is the second transmission scheme, in cases, generating CQI may include determining a PMI reporting scheme, wherein the PMI reporting scheme may include full PMI reporting, partial PMI reporting or no CSI reporting, and deriving a CQI based on the determined transmission scheme may include applying the PMI reporting scheme to a second group of CSI-RS-ports, in cases, and deriving the CSI-RS-RS ports includes applying the two RS-RS ports.

In examples, determining a transmission scheme for generating a CQI can include identifying that a time offset value is greater than zero and that a precoder cycling granularity value is not equal to a non-cycling indicator, wherein the determined transmission scheme is a second transmission scheme that can include SCDD and RBG level precoder cycling in cases, the CQI is based on a PMI reporting scheme and the time offset value and precoder cycling granularity value link adaptation component 1030 can perform link adaptation based on the determined transmission scheme and CSI reporting.

In some cases, , the predetermined precoder cycling granularity value set includes a multiple of the number of RBs and an acyclic indicator, and a maximum multiple of the number of RBs is less than or equal to a minimum frequency granularity for CSI feedback, and the acyclic indicator is equal to zero in some cases , the predetermined precoder cycling granularity value set includes a multiple of the number of RBs or a fraction of RBs 34 for CSI feedback in some cases , in some cases the predetermined value indicator may configure at least of the time or cycling granularity values via a MAC CE, or an RRC message, or DCI (e.g., configure directly to the UE) in some cases the predetermined value indicator may configure the time or cycling granularity value set via a MAC CE, or an RRC message, or DCI, and the precoder cycling granularity value set may be equal to an acyclic indicator, and the UE parameter set may then report the UE parameters directly to the UE115, and the UE parameters may then select a precoding parameter set that is not associated with the UE115, and the UE parameters may then report the UE parameters directly to the UE 115.

FIG. 11 shows a schematic diagram of a system 1100 that includes a device 1105 in accordance with aspects of the disclosure, the device 1105 may be an example of a base station 105 as described, for example, with reference to FIG. 1, or include components of a base station 105, the device 1105 may include components for bi-directional voice and data communications, including components for sending and receiving communications, including a base station communications manager 1115, a processor 1120, a memory 1125, software 1130, a transceiver 1135, an antenna 1140, a network communications manager 1145, and an inter-station communications manager 1150, these components may be in electronic communication via or multiple buses (e.g., bus 1110). The device 1105 may communicate wirelessly with or more UEs 115.

Processor 1120 may include intelligent hardware devices (e.g., general purpose processors, DSPs, CPUs, microcontrollers, ASICs, FPGAs, programmable logic devices, discrete or transistor logic components, discrete hardware components, or any combinations thereof.) in some cases processor 1120 may be configured to operate a memory array using a memory controller in other cases memory controller may be incorporated into processor 1120 may be configured to execute computer readable instructions stored in memory to perform various functions (e.g., functions or tasks to support CSI feedback for semi-open and open loop schemes).

Memory 1125 may include RAM and rom memory 1125 may store computer readable, computer executable software 1130 comprising instructions that, when executed, cause the processor to perform various functions described herein, in some cases memory 1125 may contain a BIOS capable of controlling basic hardware or software operations, such as interactions with peripheral components or devices, etc.

The software 1130 may include code for implementing aspects of the present disclosure, including code to support CSI feedback for semi-open and open loop schemes the software 1130 may be stored in a non-transitory computer readable medium such as a system memory or other memory the software 1130 may not be directly executed by a processor in cases, but rather cause a computer (e.g., when compiled and executed) to perform the functions described herein.

The transceiver 1135 may communicate bi-directionally via antennas or multiple antennas, wired links, or wireless links as described above, for example, the transceiver 1135 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver the transceiver 1135 may also include a modem to modulate packets and provide the modulated packets to the antennas for transmission and to demodulate packets received from the antennas.

In cases, the wireless device may include a single antenna 1140, however, in cases, the device may have more than antennas 1140, which antennas 1140 may be capable of simultaneously transmitting or receiving multiple wireless transmissions the network communication manager 1145 may manage communications with the core network (e.g., via or more wired backhaul links), for example, the network communication manager 1145 may manage transmissions of data communications for client devices, such as or more UEs 115.

The inter-station communication manager 1150 may manage communications with other base stations 105 and may include a controller or scheduler for controlling communications with the UE115 in cooperation with other base stations 105 for example, the inter-station communication manager 1150 may coordinate scheduling for transmissions to the UE115 for various interference mitigation techniques such as beamforming or joint transmission, in examples, the inter-station communication manager 1150 may provide an X2 interface in LTE/LTE-A wireless communication network technology to provide communications between base stations 105.

FIG. 12 shows a flowchart illustrating a method 1200 in accordance with aspects of the present disclosure, the operations of the method 1200 may be implemented by the UE115 as described herein, or components thereof, for example, the operations of the method 1200 may be performed by a UE communications manager as described with reference to FIGS. 4-7, in examples, the UE115 may execute a set of codes to control the functional elements of the device to perform the functions described below.

At block 1205, the UE115 may determine at least of a time offset value or a precoder cycling granularity value between two or more antenna ports associated with a transmission scheme for CQI the operations of block 1205 may be performed according to the methods described herein.

At block 1210, the UE115 may generate a CQI based on at least of the determined time offset value or the determined precoder cycling granularity value the operations of block 1210 may be performed according to the methods described herein.

At block 1215, the UE115 may send the generated CQI in a CSI report. The operations of block 1215 may be performed in accordance with the methods described herein. In certain examples, aspects of the operations of block 1215 may be performed by a UE CSI reporting manager as described with reference to fig. 4-7.

Fig. 13 shows a flowchart illustrating a method 1300 in accordance with aspects of the present disclosure, the operations of the method 1300 may be implemented by a UE115 as described herein, or components thereof, for example, the operations of the method 1300 may be performed by a UE communications manager as described with reference to fig. 4-7, in some examples of , the UE115 may execute a set of codes to control the functional elements of the device to perform the functions described below.

At block 1305, the UE115 may determine a transmission scheme for the CQI, where the transmission scheme includes an th transmission scheme or a second transmission scheme the operations of block 1305 may be performed according to the methods described herein.

At block 1310, the UE115 may optionally select a time offset value from a set of predetermined time offset values, wherein the time offset value is associated with the determined transmission scheme. The operations of block 1310 may be performed in accordance with the methods described herein. In certain examples, aspects of the operations of block 1310 may be performed by a time offset and precoder granularity manager as described with reference to fig. 4-7.

At block 1315, the UE115 may optionally select a precoder cycling granularity value from a predetermined set of precoder cycling granularity values, where the precoder cycling granularity value is associated with the determined transmission scheme. The operations of block 1315 may be performed in accordance with the methods described herein. In certain examples, aspects of the operations of block 1315 may be performed by a time offset and precoder granularity manager as described with reference to fig. 4-7.

At block 1320, the UE115 may generate the cqi based on at least of the time offset value and the precoder cycling granularity value the operations of block 1320 may be performed according to the methods described herein in some examples, aspects of the operations of block 1320 may be performed by a UE CSI reporting manager as described with reference to fig. 4-7.

At block 1325, the UE115 may send the generated CQI in a CSI report. The operations of block 1325 may be performed in accordance with the methods described herein. In certain examples, aspects of the operations of block 1325 may be performed by a time offset and precoder granularity manager as described with reference to fig. 4-7.

FIG. 14 shows a flowchart illustrating a method 1400 in accordance with aspects of the present disclosure, the operations of the method 1400 may be implemented by the UE115 as described herein or components thereof, for example, the operations of the method 1400 may be performed by a UE communications manager as described with reference to FIGS. 4-7, in examples, the UE115 may execute a set of codes to control the functional elements of the device to perform the functions described below.

At block 1405, the UE115 may determine a transmission scheme for the CQI, where the transmission scheme includes an th transmission scheme or a second transmission scheme the operations of block 1405 may be performed according to the methods described herein.

At block 1410, the UE115 may determine a PMI reporting scheme based on the quantities associated with the CSI reporting, where the PMI reporting scheme may include full PMI reporting, partial PMI reporting, or no PMI reporting. The operations of block 1410 may be performed according to the methods described herein. In some examples, aspects of the operations of block 1410 may be performed by a CQI component as described with reference to fig. 4-7.

At block 1415, the UE115 may determine at least of a time offset value or a precoder cycling granularity value between two or more antenna ports associated with a transmission scheme for CQI the operations of block 1415 may be performed according to the methods described herein.

At block 1420, the UE115 may derive a CQI based on the determined PMI reporting scheme. The operations of block 1420 may be performed according to the methods described herein. In some examples, aspects of the operations of block 1420 may be performed by the CQI component as described with reference to fig. 4-7.

At block 1425, the UE115 may send the generated CQI in a CSI report. The operations of block 1425 may be performed in accordance with the methods described herein. In certain examples, aspects of the operations of block 1425 may be performed by a UE CSI reporting manager as described with reference to fig. 4-7.

FIG. 15 shows a flow diagram illustrating a method 1500 in accordance with aspects of the present disclosure the operations of the method 1500 may be implemented by a base station 105 as described herein or components thereof for example, the operations of the method 1500 may be performed by a base station communications manager as described with reference to FIGS. 8-11 at in some examples, the base station 105 may execute a set of codes to control the functional elements of the device to perform the functions described below.

At block 1505, the base station 105 may receive CQI in a CSI report, the CQI based on at least of a time offset value between two or more antenna ports or a precoder cycling granularity value the operations of block 1505 may be performed according to the methods described herein.

At block 1510, the base station 105 may determine a transmission scheme for generating the CQI based on at least of the time offset value or the precoder cycling granularity value the operations of block 1510 may be performed according to the methods described herein, in some examples, aspects of the operations of block 1510 may be performed by a transmission scheme manager as described with reference to fig. 8-11.

At block 1515, the base station 105 may perform link adaptation based on the determined transmission scheme and the CSI report. The operations of block 1515 may be performed in accordance with the methods described herein. In some examples, aspects of the operations of block 1515 may be performed by a link adaptation component as described with reference to fig. 8-11.

FIG. 16 shows a flow diagram for illustrating a method 1600 in accordance with aspects of the present disclosure, the operations of the method 1600 may be implemented by a base station 105 as described herein or components thereof for example, the operations of the method 1600 may be performed by a base station communications manager as described with reference to FIGS. 8-11 at some examples the base station 105 may execute a set of codes to control the functional elements of the device to perform the functions described below.

At block 1605, the base station 105 may transmit an indication of the predetermined set of time offset values and an indication of the predetermined set of precoder cycling granularity values via a MAC CE, or RRC message, or DCI. The operations of block 1605 may be performed in accordance with the methods described herein. In some examples, aspects of the operations of block 1605 may be performed by a predetermined value indicator as described with reference to fig. 8-11.

At block 1610, the base station 105 may receive a CQI in a CSI report, the CQI based on at least of a time offset value between two or more antenna ports or a precoder cycling granularity value the operations of block 1610 may be performed according to the methods described herein.

At block 1615, the base station 105 may determine a transmission scheme for generating CQI based on at least of the time offset value or the precoder cycling granularity value the operations of block 1615 may be performed according to the methods described herein, in some examples, aspects of the operations of block 1615 may be performed by a transmission scheme manager as described with reference to fig. 8-11.

At block 1620, the base station 105 may perform link adaptation based on the determined transmission scheme and CSI report. The operations of block 1620 may be performed according to methods described herein. In some examples, aspects of the operations of block 1620 may be performed by a link adaptation component as described with reference to fig. 8-11.

It should be noted that these methods are merely example implementations and that the operations of these methods may be rearranged or otherwise modified to make other implementations possible.

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 other systems. The terms "system" and "network" are generally used interchangeably. A CDMA system may implement a radio technology such as CDMA2000, Universal Terrestrial Radio Access (UTRA), and so on. CDMA2000 covers IS-2000, IS-95 and IS-856 standards. The IS-2000 version IS commonly referred to as CDMA 20001X, 1X, etc. IS-856(TIA-856) IS commonly referred to as CDMA 20001 xEV-DO, High Rate Packet Data (HRPD), and so on. UTRA includes wideband CDMA (wcdma) and other CDMA variants. TDMA systems may implement radio technologies such as global system for mobile communications (GSM).

An 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), IEEE 802.20, Flash OFDM (Flash-OFDM), etc. UTRA and E-UTRA are parts of Universal Mobile Telecommunications System (UMTS.) LTE and LTE-A are versions of UMTS using E-UTRA the techniques described herein UTRA, E-UTRA, UMTS, LTE-A, NR, and GSM are described in documents from an organization named "third Generation partnership project 2" (3GPP2) the techniques described herein may be used for the systems and radio technologies mentioned above and for other systems and radio technologies, although aspects of LTE or NR systems are described for purposes of example and either the term NR is used in much of the description or the term NR may be applied to LTE or NR techniques described herein.

The wireless communication systems or systems described herein may include heterogeneous LTE/LTE-A or NR networks in which different types of eNBs provide coverage for various geographic areas.

A base station may include, or be referred to by those skilled in the art as, a base transceiver station, a wireless base station, an access point, a wireless transceiver, a node B, an evolved node B (eNodeB) (eNB), a gNB, a home node B, a home evolved node B, or some other suitable terminology.

In accordance with various examples, a small cell may include a pico cell, a femto cell, and a micro cell.

The wireless communication system or systems described herein may support synchronous operation 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, the base stations 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.

Each communication link described herein (e.g., which includes wireless communication systems 100 and 200 as described with reference to fig. 1 and 2) may include or more carriers, where each carrier may be a signal composed of multiple subcarriers (e.g., waveform signals of different frequencies).

The term "exemplary" as used herein means "serving as an example, instance, or illustration," and does not mean "preferred" or "advantageous" over other examples.

If only the th reference number is used in the specification, the description may apply to any of the components in the similar components having the same th reference number, regardless of the second reference number.

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 above 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 or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein.

For example, due to the nature of software, the functions described herein may be implemented using software, hardware, firmware, hardwiring, or any combination of these that are executed by a processor.A feature for implementing a function may be physically located in a plurality of locations including being distributed such that portions of the function are implemented in different physical locations.As used herein (including in the claims), when used in a list of two or more items, the term "and/or" as used herein (including in the claims) is intended to refer to any item of the listed items that may be employed by itself, or to any combination of two or more of the listed items that may be employed, such as a combination of at least one of the phrases "including at least one of the elements , or a- , such as those used in a list of at least one of the elements , or a- , such as in a combination of the phrases" including at least one of the elements , or a-638, such as "and" including at least one of the elements found in a-468, a-B-or "including at least one of the combination of the elements — e.g. including at least one of the phrases" including at least one of the elements , such as "and/or" including the combination of the phrases "including at least one of the elements 357- , such as used herein (including at least one of the combination of the phrases" including at least one of the items- -B- , such as a-B-C-B-.

As used herein, the phrase "based on" should not be construed as referring to a closed set of conditions. For example, exemplary features described as "based on condition a" may be based on condition a and condition B without departing from the scope of the 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.

By way of example, and not limitation, non-transitory computer-readable media may include RAM, ROM, electrically erasable programmable read-only memory (EEPROM), 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.

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.