US-12621102-B2 - UE-assisted channel reconstruction based on partial spatial sounding

Abstract

A user equipment may be configured to assist channel reconstruction using partial spatial sounding. In some aspects, the user equipment (UE) may transmit, to another device, correlation capability information indicating a sounding reference signal (SRS) grouping capability of the UE, and receive, from the other device, reference signal (RS) configuration information for configuring a sounding procedure to be performed by the UE. Further, the UE may transmit a reference signal to the other device over a reference antenna port of the UE to allow the other device to determine channel information for another antenna port of the UE, and receive data from the other device based on the channel information.

Inventors

• Runxin WANG
• Muhammad Sayed Khairy Abdelghaffar
• Yu Zhang
• Krishna Kiran Mukkavilli
• Tingfang JI
• Hwan Joon Kwon
• Ahmed Elshafie

Assignees

• QUALCOMM INCORPORATED

Dates

Publication Date

20260505

Application Date

20210115

Claims (20)

1. 1 . A method of wireless communication at a user equipment (UE), comprising: transmitting, to another device, correlation capability information indicating a sounding reference signal (SRS) grouping capability of the UE, including an indication of a first SRS grouping of a reference antenna port and another antenna port and correlation information between the reference antenna port and the another antenna port; receiving, from the another device, reference signal (RS) configuration information for configuring a sounding procedure to be performed by the UE; transmitting, based on the RS configuration information, a reference signal to the another device over the reference antenna port of the UE to allow the another device to determine channel information for the another antenna port of the UE based on the reference signal and correlation capability information; and receiving data from the another device based on the channel information.
2. 2 . The method of claim 1 , wherein transmitting the correlation capability information comprises transmitting the SRS grouping capability identifying a plurality of antenna groups, the SRS grouping capability identifying at least one of a number of available reference antenna ports in an individual antenna group of the plurality of antenna groups, an amount of the plurality of antenna groups, or an amount of antenna ports in an individual antenna group of the plurality of antenna groups.
3. 3 . The method of claim 1 , wherein transmitting the correlation capability information comprises: transmitting a SRS grouping capability identifier that identifies the correlation capability information and defines: a first antenna group including the reference antenna port and the another antenna port, or a second antenna group including the reference antenna port and a third antenna group including the another antenna port.
4. 4 . The method of claim 1 , wherein transmitting the correlation capability information comprises transmitting a plurality of SRS grouping capabilities including the SRS grouping capability, and wherein receiving the RS configuration information comprises receiving a selection of the SRS grouping capability.
5. 5 . The method of claim 1 , wherein receiving the RS configuration information comprises receiving an identifier of the reference antenna port from the another device, the reference antenna port selected by the another device based on the correlation capability information.
6. 6 . The method of claim 1 , wherein receiving the RS configuration information comprises receiving one or more antenna identifiers of one or more reference antenna ports from the another device, the one or more reference antenna ports selected by the another device based on an attribute of the another device and the one or more antenna identifiers including an identifier of the reference antenna port.
7. 7 . The method of claim 1 , further comprising determining an amount of antenna ports to be used for physical downlink shared channel (PDSCH) precoding based on the RS configuration information.
8. 8 . The method of claim 1 , wherein receiving the RS configuration information comprises receiving an indication of an amount of antenna ports to be used for physical downlink shared channel (PDSCH) precoding within radio resource control (RRC) signaling.
9. 9 . The method of claim 1 , further comprising: transmitting a correlation report to the another device, the correlation report including the correlation capability information defining a correlation between the reference antenna port and at least the another antenna port.
10. 10 . The method of claim 9 , wherein transmitting the correlation report to the another device comprises transmitting, based on reporting configuration information received from the another device, the correlation report to the another device via a channel state information report.
11. 11 . The method of claim 9 , wherein transmitting the correlation report to the another device comprises transmitting, based on reporting configuration information received from the another device, the correlation report to the another device via an uplink control information (UCI) message.
12. 12 . The method of claim 9 , wherein transmitting the correlation report to the another device comprises transmitting the correlation report to the another device via a medium access control (MAC) protocol control element (CE) triggered by a network.
13. 13 . The method of claim 9 , wherein the correlation capability information is first correlation capability information, the reference antenna port is a first antenna port, the another antenna port is a second antenna port, and transmitting the correlation report to the another device comprises transmitting a partial correlation report with the first correlation capability information and without second correlation capability information corresponding to a correlation between the first antenna port and a third antenna port of the UE that belongs to an antenna group different from the first antenna port and the second antenna port.
14. 14 . The method of claim 13 , further comprising receiving reporting configuration information indicating an amount of the correlation capability information needed by the another device, and wherein transmitting the correlation report to the another device comprises transmitting the partial correlation report based on the reporting configuration information.
15. 15 . A user equipment (UE) for wireless communication, comprising: a memory storing computer-executable instructions; and at least one processor coupled with the memory and configured to: transmit, to another device, correlation capability information indicating a sounding reference signal (SRS) grouping capability of the UE, including an indication of a first SRS grouping of a reference antenna port and another antenna port and correlation information between the reference antenna port and the another antenna port; receive, from the another device, reference signal (RS) configuration information for configuring a sounding procedure to be performed by the UE; transmit, based on the RS configuration information, a reference signal to the another device over the reference antenna port of the UE to allow the another device to determine channel information for the another antenna port of the UE based on the reference signal and correlation capability information; and receive data from the another device based on the channel information.
16. 16 . A method of wireless communication at a device, comprising: receiving, from a user equipment (UE), correlation capability information indicating a sounding reference signal (SRS) grouping capability of the UE, including an indication of a first SRS grouping of a reference antenna port and another antenna port and correlation information between the reference antenna port and the another antenna port; determining reference signal (RS) configuration information for configuring a sounding procedure to be performed by the UE; transmitting the RS configuration information to the UE; measuring a reference signal received from the reference antenna port of the UE to determine measurement information, the reference signal transmitted based on the RS configuration information; determining channel information associated with the reference antenna port and the another antenna port of the UE based on the measurement information and correlation capability information; and transmitting data to the UE based on the channel information.
17. 17 . The method of claim 16 , wherein the reference antenna port is a first antenna port, the another antenna port is a second antenna port, and determining channel information associated with the UE comprises determining channel state information corresponding to the first antenna port and the second antenna port of a first antenna grouping including and a third antenna port of a second antenna grouping.
18. 18 . The method of claim 16 , further comprising determining the correlation capability information based on the SRS grouping capability.
19. 19 . The method of claim 16 , wherein receiving the correlation capability information comprises receiving a plurality of SRS grouping capabilities, and further comprising: selecting the SRS grouping capability; and transmitting an identifier of the SRS grouping capability to the UE.
20. 20 . The method of claim 19 , wherein selecting the SRS grouping capability comprises selecting the SRS grouping capability associated with a plurality of antenna groups having a uniform amount of antenna ports.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a 35 U.S.C. § 371 National Phase Application of PCT Application No. PCT/CN2021/071994 filed Jan. 15, 2021, entitled “UE-ASSISTED CHANNEL RECONSTRUCTION BASED ON PARTIAL SPATIAL SOUNDING,” which is assigned to the assignee hereof and hereby incorporated by reference herein. BACKGROUND Technical Field The present disclosure relates generally to wireless communication, and more particularly, to channel reconstruction based on partial spatial sounding. Introduction Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts. Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources. Examples of such multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access (SC-FDMA) systems, and time division synchronous code division multiple access (TD-SCDMA) systems. These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate on a municipal, national, regional, and even global level. An example telecommunication standard is 5G New Radio (NR). 5G NR is part of a continuous mobile broadband evolution promulgated by Third Generation Partnership Project (3GPP) to meet new requirements associated with latency, reliability, security, scalability (such as with Internet of Things (IoT)), and other requirements. 5G NR includes services associated with enhanced mobile broadband (eMBB), massive machine type communications (mMTC), and ultra reliable low latency communications (URLLC). Some aspects of 5G NR may be based on the 4G Long Term Evolution (LTE) standard. There exists a need for further improvements in 5G NR technology. SUMMARY The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later. A first example implementation includes a method of wireless communication at a user equipment (UE) comprising transmitting, to another device, correlation capability information indicating a sounding reference signal (SRS) grouping capability of the UE, receiving, from the another device, reference signal (RS) configuration information for configuring a sounding procedure to be performed by the UE, and transmitting a reference signal to the another device over a reference antenna port of the UE based on the RS configuration information, the another device determining channel information for another antenna port of the UE based on the reference signal and correlation information. The disclosure also provides an apparatus (e.g., a UE) including a memory storing computer-executable instructions and at least one processor configured to execute the computer-executable instructions to perform the above method, an apparatus including means for performing the above method, and a non-transitory computer-readable medium storing computer-executable instructions for performing the above method. A second example implementation includes a method of wireless communication at a device comprising receiving, from a user equipment, correlation capability information indicating a SRS grouping capability of the UE, determining RS configuration information for configuring a sounding procedure to be performed by the UE, transmitting the RS configuration information to the UE, receiving a reference signal from a reference antenna port of the UE based on the RS configuration information, and determining channel information associated with the UE based on the reference signal and correlation information. The disclosure also provides an apparatus (e.g., a base station, a UE, etc.) including a memory storing computer-executable instructions and at least one processor configured to execute the computer-executable instructions to perform the above method, an apparatus including means for performing the above method, and a non-transitory computer-readable medium storing computer-executable instructions for performing the above method. To the accomplishment of the foregoing and related ends, the one or more aspects include the features hereinafter fully described and particularly pointed out in the claims. The following description and the annexed drawing