# US 2023/0056484 A1 · Sidelink csi complexity management

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- Number: US 2023/0056484 A1
- Document ID: US20230056484A1
- Status: Published application
- Kind: A1
- Application number: 17/820,864
- Filed: 2022-08-18
- Published: 2023-02-23
- Earliest claimed: 2021-08-20
- Assignees: QUALCOMM Incorporated
- Applicants: QUALCOMM Incorporated
- Inventors: Seyedkianoush HOSSEINI; Peter GAAL; Wanshi CHEN; Juan MONTOJO; Ahmed ELSHAFIE; Mostafa KHOSHNEVISAN
- Web page: https://patentgrep.com/patent/US20230056484A1

## CPC

- H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports}
- H04B 7/0628: {Diversity capabilities}
- H04B 7/063: {Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection}
- H04B 7/0632: {Channel quality parameters, e.g. channel quality indicator [CQI]}
- H04W 8/24: Transfer of terminal data
- H04W 72/1263: Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
- H04W 76/14: Direct-mode setup
- H04W 92/18: between terminal devices
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04B: TRANSMISSION

## Abstract

Aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for channel state information (CSI) reporting. One aspect provides a method for wireless communication by a first user equipment (UE). The method generally includes transmitting, to a second UE, an indication of a capability of the first UE for reporting sidelink channel state information (SL-CSI) to the second UE, receiving, from the second UE, a request for SL-CSI, and reporting SL-CSI to the second UE subject to the capability of the first UE for reporting SL-CSI to the second UE.

## Claims

### Claim 1

A first user equipment (UE), comprising:
a memory; and
a processor coupled to the memory, wherein the processor is configured to:
transmit, to a second UE, an indication of a capability of the first UE for reporting sidelink channel state information (SL-CSI) to the second UE;
receive, from the second UE, a request for SL-CSI, wherein the request is based on the indication; and
report, based on the request, SL-CSI to the second UE.

### Claim 2 (depends on 1)

The first UE of claim 1, wherein the indication of the capability comprises an indication of a number of CSI processing units (CPUs) the first UE supports for reporting SL-CSI to the second UE.

### Claim 3 (depends on 1)

The first UE of claim 1, wherein the processor is configured to determine a number of CSI processing units (CPUs) the first UE supports for the second UE as a percentage of a total number of CPUs the first UE supports for SL-CSI reporting.

### Claim 4 (depends on 2)

The first UE of claim 2, wherein the processor is configured to perform one or more actions if the request would cause more than the indicated number of CPUs the first UE supports for reporting SL-CSI to be used.

### Claim 5 (depends on 4)

The first UE of claim 4, wherein the one or more actions comprise processing SL-CSI requests according to a prioritization procedure.

### Claim 6 (depends on 4)

The first UE of claim 4, wherein the one or more actions comprise reporting partial SL-CSI to the second UE, wherein, to report SL-CSI to the second UE based on the request, the processor is configured to report partial SL-CSI according to the one or more actions.

### Claim 7 (depends on 6)

The first UE of claim 6, wherein, to report partial SL-CSI according to the one or more actions, the processor is configured to report a second type of SL-CSI different than a first type of SL-CSI requested by the second UE.

### Claim 8 (depends on 6)

The first UE of claim 6, wherein, to report partial SL-CSI according to the one or more actions, the processor is configured to report SL-CSI for fewer carriers than requested by the second UE.

### Claim 9 (depends on 6)

The first UE of claim 6, wherein the processor is configured to:
drop SL-CSI that was not reported with the partial SL-CSI; or
report stale information for SL-CSI that was not reported with the partial SL-CSI.

### Claim 10 (depends on 6)

The first UE of claim 6, wherein the processor is configured to:
indicate a time duration over which the first UE can transmit SL-CSI that was not reported with the partial SL-CSI.

### Claim 11 (depends on 2)

The first UE of claim 2, wherein the processor is configured to:
receive, from the second UE, an indication of a number of CPUs the second UE supports for reporting SL-CSI to the first UE; and
transmit, to the second UE, one or more requests for SL-CSI based on the indication of the number of CPUs the second UE supports for reporting SL-CSI to the first UE.

### Claim 12 (depends on 2)

The first UE of claim 2, wherein the processor is configured to:
receive a second request, from the second UE, that a portion or number of a total number of CPUs the first UE supports is allocated for reporting SL-CSI to the second UE; and
transmit a response that at least one of: acknowledges the request or proposes a different portion or number of total number of CPUs, than requested based on the second request, be allocated for reporting SL-CSI to the second UE.

### Claim 13 (depends on 2)

The first UE of claim 2, wherein the processor is configured to receive signaling, from a network entity, indicating at least one of:
the number of CPUs the first UE supports for reporting SL-CSI to the second UE; or
a total number of CPUs the first UE supports for SL-CSI reporting.

### Claim 14 (depends on 2)

The first UE of claim 2, wherein the first UE allocates the CPUs across one or more sidelink resource pools, across one or more sidelink bandwidth parts (SL BWPs), or across one or more SL carriers.

### Claim 15 (depends on 1)

The first UE of claim 1, wherein the indication of the capability comprises an indication of one or more SL-CSI reporting types or configurations the first UE supports for reporting SL-CSI to the second UE.

### Claim 16 (depends on 15)

The first UE of claim 15, wherein the indication of the capability comprises an indication of at least one of:
that a first type of SL-CSI and a second type of SL-CSI can be triggered;
that while the first type of SL-CSI is triggered but not reported, the second type of SL-CSI can be triggered and sent at a later time; or
that a third type of SL-CSI cannot be reported if the third type of SL-CSI is triggered while a request for at least one of the first or second type of SL-CSI is pending.

### Claim 17

A second user equipment (UE), comprising:
a memory; and
a processor coupled to the memory, wherein the processor is configured to:
receive, from a first UE, an indication of a capability of the first UE for reporting sidelink channel state information (SL-CSI) to the second UE;
transmit, to the first UE, a request for SL-CSI, wherein the request is based on the indication; and
receive, from the first UE based on the request, a SL-CSI report.

### Claim 18 (depends on 17)

The second UE of claim 17, wherein the indication of the capability comprises an indication of a number of CSI processing units (CPUs) the first UE supports for reporting SL-CSI to the second UE.

### Claim 19 (depends on 18)

The second UE of claim 18, wherein the processor is configured to receive a partial SL-CSI report.

### Claim 20 (depends on 19)

The second UE of claim 19, wherein the partial SL-CSI report comprises a second type of SL-CSI different than a first type of SL-CSI requested by the second UE.

### Claim 21 (depends on 19)

The second UE of claim 19, wherein the partial SL-CSI report comprises a second SL-CSI report for fewer carriers than requested by the second UE.

### Claim 22 (depends on 19)

The second UE of claim 19, wherein the processor is configured to:
receive, from the first UE, an indication of a time duration over which the first UE can transmit SL-CSI that was not reported with the partial SL-CSI.

### Claim 23 (depends on 18)

The second UE of claim 18, wherein the processor is configured to:
transmit, to the first UE, an indication of a number of CPUs the second UE supports for reporting SL-CSI to the first UE.

### Claim 24 (depends on 18)

The second UE of claim 18, wherein the processor is configured to:
transmit a second request, to the first UE, that a portion or number of total number of CPUs the first UE supports is allocated for reporting SL-CSI to the second UE; and
receive a response, from the first UE, that at least one of: acknowledges the request or proposes a different portion or number of total number of CPUs, than requested based on the second request, be allocated for reporting SL-CSI to the second UE.

### Claim 25 (depends on 18)

The second UE of claim 18, wherein the processor is configured to receive signaling, from a network entity, indicating at least one of:
the number of CPUs the first UE supports for reporting SL-CSI to the second UE; or
a total number of CPUs the first UE supports for SL-CSI reporting.

### Claim 26 (depends on 17)

The second UE of claim 17, wherein the indication of the capability comprises an indication of one or more SL-CSI reporting types or configurations the first UE supports for reporting SL-CSI to the second UE.

### Claim 27 (depends on 26)

The second UE of claim 26, wherein the indication of the capability comprises a third indication of at least one of:
that a first type of SL-CSI and a second type of SL-CSI can be triggered;
that while the first type of SL-CSI is triggered but not reported, the second type of SL-CSI can be triggered and sent at a later time; or
that a third type of SL-CSI, if triggered while a request for at least one of the first or second type of SL-CSI is pending, the first UE will not report the third type of SL-CSI.

### Claim 28

A method of wireless communication performed by a first user equipment (UE), comprising:
transmitting, to a second UE, an indication of a capability of the first UE for reporting sidelink channel state information (SL-CSI) to the second UE;
receiving, from the second UE, a request for SL-CSI, wherein the request is based on the indication; and
reporting, based on the request, SL-CSI to the second UE.

### Claim 29

A method of wireless communication performed by a second user equipment (UE), comprising:
receiving, from a first UE, an indication of a capability of the first UE for reporting sidelink channel state information (SL-CSI) to the second UE;
transmitting, to the first UE, a request for SL-CSI, wherein the request is based on the indication; and
receiving, from the first UE based on the request, a SL-CSI report.