Joint channel state information for virtual user equipment

Patent metadata

Field	Value
Publication number	US-12537576-B2
Application number	US-202017787037-A
Country	US
Kind code	B2
Filing date	Nov 24, 2020
Priority date	Dec 18, 2019
Publication date	Jan 27, 2026
Grant date	Jan 27, 2026

Abstract

A base station (BS) communicatively connected to a group including a first user equipment (UE) and a second UE can implement a method. The method includes determining ( 316 or 416 ), by processing hardware of the base station, a channel state information (CSI) process configuration for the group. The method also includes transmitting ( 318 ) a control signal including the CSI process configuration to the group, and transmitting ( 336 ) a reference signal to the group in accordance with the CSI process configuration. The method further includes, in response to transmitting the reference signal to the group, receiving ( 354 ) from at least one UE of the group an indication of joint channel state of the group.

First claim

What is claimed is:

1 . A method in a base station communicatively connected to a group including a first user equipment (UE) and a second UE, the method comprising:
receiving, from at least one UE of the group, joint reception capability information of the group; determining, by the base station, a channel state information (CSI) process configuration for the group based at least in part on the joint reception capability information; transmitting a control signal including the CSI process configuration to the group; transmitting a reference signal to the group in accordance with the CSI process configuration; and in response to transmitting the reference signal to the group, receiving from at least one UE of the group an indication of joint channel state of the group.

2 . The method of claim 1 , wherein the indication of joint channel state indicates at least a multiple-input multiple-output (MIMO) reception capability of the group.

3 . The method of claim 1 , wherein the indication of joint channel state indicates at least an antenna availability of the group.

4 . The method of claim 1 , wherein the joint reception capability information indicates how many multiple-input multiple-output (MIMO) layers are supported by the group.

5 . The method of claim 1 , wherein receiving the indication of joint channel state includes receiving a joint channel quality indicator (CQI) of the group.

6 . An apparatus for wireless communication at a first user equipment (UE) of a group that includes the first UE and a second UE, comprising:
a transceiver; a memory; and a processor coupled to the memory and the transceiver, the processor configured to:
transmit, to a base station, joint reception capability information of the group;
receive, from the base station, a control signal including a channel state information (CSI) process configuration of the group;
receive a reference signal from the base station;
determine a first indication of UE-specific channel state based on the reference signal;
receive, from the second UE via a local wireless network, a second indication of UE-specific channel state determined by the second UE based on the reference signal;
determine, based on at least the first indication of UE-specific channel state and the second indication of UE-specific channel state, an indication of joint channel state; and
transmit the indication of joint channel state to the base station.

7 . The apparatus of claim 6 , wherein to transmit the indication of joint channel state to the base station the processor is configured to:
transmit the indication of joint channel state to the second UE via the local wireless network for transmission to the base station.

8 . The apparatus of claim 6 , wherein the first indication of UE-specific channel state, the second indication of UE-specific channel state, and the indication of joint channel state indicates at least an antenna availability of the first UE, the second UE, and the group, respectively.

9 . The apparatus of claim 6 , wherein the CSI process configuration including one or both of time domain information, and frequency domain information, for the reference signal.

10 . The apparatus of claim 9 , wherein the processor is configured to:
before reception of the control signal, receive UE-specific reception capability information from the second UE via the local wireless network; and determine the joint reception capability information of the group based on at least the UE-specific reception capability information from the second UE and UE-specific reception capability information of the first UE.

11 . The apparatus of claim 6 , wherein the indication of joint channel state indicates at least a joint MIMO reception capability of the group.

12 . The apparatus of claim 9 , wherein the processor is configured to:
generate first I/Q samples by demodulating the received control signal; receive, from the second UE via the local wireless network, second I/Q samples corresponding to the control signal as received by the second UE; and decode the CSI process configuration by processing at least the first I/Q samples and the second I/Q samples.

13 . The apparatus of claim 9 , wherein the processor is configured to:
generate I/Q samples by demodulating the received control signal; transmit the I/Q samples to the second UE or a third UE of the group via the local wireless network; and receive a decoded CSI process configuration from the second UE or the third UE via the local wireless network.

14 . The apparatus of claim 10 , wherein the joint reception capability information indicates how many multiple-input multiple-output (MIMO) layers are supported by the group.

15 . The apparatus of claim 6 , wherein to determine the indication of joint channel state the processor is configured to determine a joint channel quality indicator (CQI) based on a first CQI included in the first indication of UE-specific channel state, and a second CQI included in the second indication of UE-specific channel state.

16 . The apparatus of claim 15 , wherein the processor is configured to determine the joint CQI is further based on whether at least one UE of the group supports non-linear joint processing.

17 . A method in a first user equipment (UE) of a group that includes the first UE and a second UE, the method comprising:
transmitting, to a base station, joint reception capability information of the group; receiving, from the base station, a control signal including a channel state information (CSI) process configuration of the group; receiving a reference signal from the base station; determining, by the first UE, an indication of UE-specific channel state based on the reference signal; transmitting the indication of UE-specific channel state to the second UE via a local wireless network; receiving an indication of joint channel state from the second UE via the local wireless network; and transmitting the indication of joint channel state to the base station.

18 . The method of claim 17 , wherein the CSI process configuration includes one or both of time domain information, and frequency domain information, for the reference signal.

19 . The method of claim 18 , further comprising:
before receiving the control signal, transmitting UE-specific reception capability information to the second UE via the local wireless network; and receiving joint reception capability information of the UE group from the second UE via the local wireless network.

Assignees

• Google Llc

Inventors

• Wang Jibing
• Stauffer Erik

Classifications

• H04B7/0417

  Feedback systems · CPC title

• H04L5/0057

  Physical resource allocation for CQI · CPC title

• H04B7/0628

  Diversity capabilities · CPC title

• H04B7/0626 Primary

  Channel coefficients, e.g. channel state information [CSI] · CPC title

• H04B7/026

  Co-operative diversity, e.g. using fixed or mobile stations as relays · CPC title