US-12627438-B2 - Mapping reference signal resources to virtual panels

US12627438B2US 12627438 B2US12627438 B2US 12627438B2US-12627438-B2

Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine a plurality of virtual antenna panels, wherein the plurality of virtual antenna panels correspond to a plurality of groups of antenna ports and map to one or more portions of at least one physical antenna panel. The UE may map a plurality of reference signal resources to the plurality of virtual antenna panels. The UE may transmit, to a base station and based at least in part on the mapping, reference signals using the plurality of reference signal resources. Numerous other aspects are provided.

Inventors

Muhammad Sayed Khairy Abdelghaffar
Yan Zhou
Wooseok Nam
Mostafa Khoshnevisan
Yu Zhang

Assignees

QUALCOMM INCORPORATED

Dates

Publication Date: 20260512
Application Date: 20200907

Claims (20)

1 . An apparatus for wireless communication at a user equipment (UE), comprising: a memory; and one or more processors coupled to the memory, the one or more processors configured to: determine a plurality of virtual antenna panels, wherein the plurality of virtual antenna panels correspond to a plurality of groups of antenna ports and map to one or more portions of one or more physical antenna panels; map a plurality of reference signal resources to the plurality of virtual antenna panels; assign a first reference signal of a plurality of reference signals to a first virtual antenna panel of the plurality of virtual antenna panels, and assign a second reference signal of the plurality of reference signals to a second virtual antenna panel of the plurality of virtual antenna panels; based on a determination that the first virtual antenna panel and the second virtual antenna panel correspond to a same physical antenna panel of the one or more physical antenna panels, transmit the first reference signal and the second reference signal by time duplexing with a first gap time between the first reference signal and the second reference; and based on a determination that the first virtual antenna panel and the second virtual antenna panel correspond to different physical antenna panels of the one or more physical antenna panels, transmit the first reference signal and the second reference signal by time duplexing with a second gap time between the first reference signal and the second reference, wherein the second gap time is larger than the first gap time.
2 . The apparatus of claim 1 , wherein the groups of antenna ports are configured for simultaneous reception and are not configured for simultaneous transmission.
3 . The apparatus of claim 1 , wherein the one or more processors are further configured to: apply a same spatial-domain transmission filter to transmit on the plurality of reference signal resources.
4 . The apparatus of claim 1 , wherein a power status of a target one of the plurality of virtual antenna panels is at least based on whether a corresponding physical antenna panel of the one or more physical antenna panels is idle or fully powered.
5 . The apparatus of claim 1 , wherein the first gap time or the second gap time are further based at least in part on a mapping between the one or more portions of the one or more physical antenna panels and the plurality of virtual antenna panels.
6 . The apparatus of claim 1 , wherein the one or more processors are further configured to: transmit two or more gap times based at least in part on power statuses of the plurality of virtual antenna panels.
7 . The apparatus of claim 6 , wherein the one or more processors are further configured to: receive, based at least in part on the two or more gap times, two or more time-domain resources configurations corresponding to each of the plurality of reference signal resources, wherein the plurality of reference signals are transmitted on the plurality of reference signal resources based at least in part on the power statuses of the plurality of virtual antenna panels.
8 . The apparatus of claim 7 , wherein the one or more processors are further configured to: transmit information indicating the power statuses of the plurality of virtual antenna panels.
9 . The apparatus of claim 8 , wherein the information further indicates gap times associated with powering up the plurality of virtual antenna panels.
10 . The apparatus of claim 7 , wherein the one or more processors are further configured to: receive instructions to reconfigure the power statuses of the plurality of virtual antenna panels.
11 . An apparatus for wireless communication at a network node, comprising: a memory; and one or more processors coupled to the memory, the one or more processors configured to: transmit an indication of a plurality of reference signal resources; receive an indication of a plurality of virtual antenna panels, wherein the plurality of virtual antenna panels correspond to a plurality of groups of antenna ports and map to one or more portions of one or more physical antenna panels; assign a first reference signal of a plurality of reference signals to a first virtual antenna panel of the plurality of virtual antenna panels, and assign a second reference signal of the plurality of reference signals to a second virtual antenna panel of the plurality of virtual antenna panels; based on a determination that the first virtual antenna panel and the second virtual antenna panel correspond to a same physical antenna panel of the one or more physical antenna panels, transmit the first reference signal and the second reference signal by time duplexing with a first gap time between the first reference signal and the second reference signal; and based on a determination that the first virtual antenna panel and the second virtual antenna panel correspond to different physical antenna panels of the one or more physical antenna panels, transmit the first reference signal and the second reference signal by time duplexing with a second gap time between the first reference signal and the second reference signal, wherein the second gap time is larger than the first gap time.
12 . The apparatus of claim 11 , wherein the one or more processors are further configured to: transmit a spatial-domain transmission filter to use on the plurality of reference signal resources.
13 . The apparatus of claim 11 , wherein a power status of a target one of the plurality of virtual antenna panels is at least based on whether a corresponding physical antenna panel of the one or more physical antenna panels is idle or fully powered.
14 . The apparatus of claim 11 , wherein the first gap time or the second gap time are further based at least in part on a mapping between the one or more portions of the one or more physical antenna panels and the plurality of virtual antenna panels.
15 . The apparatus of claim 11 , wherein the one or more processors are further configured to: receive two or more gap times based at least in part on power statuses of the plurality of virtual antenna panels.
16 . The apparatus of claim 15 , wherein the one or more processors are further configured to: transmit, based at least in part on the two or more gap times, two or more time-domain resources configurations corresponding to each of the plurality of reference signal resources, wherein the plurality of reference signals are received on the plurality of reference signal resources based at least in part on the power statuses of the plurality of virtual antenna panels.
17 . The apparatus of claim 16 , wherein the one or more processors are further configured to: receive information indicating the power statuses of the plurality of virtual antenna panels.
18 . A method of wireless communication performed by a user equipment, comprising: determining a plurality of virtual antenna panels, wherein the plurality of virtual antenna panels correspond to a plurality of groups of antenna ports and map to one or more portions of one or more physical antenna panels; mapping a plurality of reference signal resources to the plurality of virtual antenna panels; assigning a first reference signal of a plurality of reference signals to a first virtual antenna panel of the plurality of virtual antenna panels, and assign a second reference signal of the plurality of reference signals to a second virtual antenna panel of the plurality of virtual antenna panels; based on a determination that the first virtual antenna panel and the second virtual antenna panel correspond to a same physical antenna panel of the one or more physical antenna panels, transmitting the first reference signal and the second reference signal by time duplexing with a first gap time between the first reference signal and the second reference signal; and based on a determination that the first virtual antenna panel and the second virtual antenna panel correspond to different physical antenna panels of the one or more physical antenna panels, transmitting the first reference signal and the second reference signal by time duplexing with a second gap time between the first reference signal and the second reference signal, wherein the second gap time is larger than the first gap time.
19 . The apparatus of claim 1 , wherein to transmit the plurality of reference signals, the one or more processors are further configured to: map each reference signal of the plurality of reference signals to a respective virtual antenna panel of the plurality of virtual antenna panels; and time duplex the reference signals across the plurality of virtual antenna panels to transmit only one of the plurality of reference signals at any given point in time.
20 . The apparatus of claim 11 , wherein to receive the plurality of reference signals, the one or more processors are further configured to: receive an indication of mapping each reference signal of the plurality of reference signals to a respective virtual antenna panel of the plurality of virtual antenna panels; and receive only one of the plurality of reference signals at any given point in time, wherein the plurality of reference signals are time duplexed across the plurality of virtual antenna panels.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application is a 35 U.S.C. 371 national stage application of International Patent Application No. PCT/CN2020/113715, filed on Sep. 7, 2020, entitled “MAPPING REFERENCE SIGNAL RESOURCES TO VIRTUAL PANELS,” which is expressly incorporated by reference herein. FIELD OF THE DISCLOSURE Aspects of the present disclosure generally relate to wireless communication and to techniques and apparatuses for mapping reference signal resources to virtual panels. BACKGROUND 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 (e.g., bandwidth, transmit power, and/or the like). 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, time division synchronous code division multiple access (TD-SCDMA) systems, and Long Term Evolution (LTE). LTE/LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP). A wireless network may include a number of base stations (BSs) that can support communication for a number of user equipment (UEs). A user equipment (UE) may communicate with a base station (BS) via the downlink and uplink. The downlink (or forward link) refers to the communication link from the BS to the UE, and the uplink (or reverse link) refers to the communication link from the UE to the BS. As will be described in more detail herein, a BS may be referred to as a Node B, a gNB, an access point (AP), a radio head, a transmit receive point (TRP), a New Radio (NR) BS, a 5G Node B, and/or the like. The above multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different user equipment to communicate on a municipal, national, regional, and even global level. New Radio (NR), which may also be referred to as 5G, is a set of enhancements to the LTE mobile standard promulgated by the Third Generation Partnership Project (3GPP). NR is designed to better support mobile broadband Internet access by improving spectral efficiency, lowering costs, improving services, making use of new spectrum, and better integrating with other open standards using orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) (CP-OFDM) on the downlink (DL), using CP-OFDM and/or SC-FDM (e.g., also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink (UL), as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation. As the demand for mobile broadband access continues to increase, further improvements in LTE, NR, and other radio access technologies remain useful. SUMMARY In some aspects, a method of wireless communication performed by a user equipment (UE) includes determining a plurality of virtual antenna panels, wherein the plurality of virtual antenna panels correspond to a plurality of groups of antenna ports and map to one or more portions of at least one physical antenna panel; mapping a plurality of reference signal resources to the plurality of virtual antenna panels; and transmitting, to a base station and based at least in part on the mapping, reference signals using the plurality of reference signal resources. In some aspects, a method of wireless communication performed by a base station includes transmitting, to a UE, an indication of a plurality of reference signal resources; receiving, from the UE, an indication of a plurality of virtual antenna panels, wherein the plurality of virtual antenna panels correspond to a plurality of groups of antenna ports and map to one or more portions of at least one physical antenna panel; and receiving, from the UE and based at least in part on the plurality of virtual antenna panels, reference signals using the plurality of reference signal resources. In some aspects, a UE for wireless communication includes a memory and one or more processors coupled with the memory, the memory and the one or more processors configured to determine a plurality of virtual antenna panels, wherein the plurality of virtual antenna panels correspond to a plurality of groups of antenna ports and map to one or more portions of at least one physical antenna panel; map a plurality of reference signal resources to the plurality of virtual antenna panels; and transmit, to a base station and based at least in part on the mapping, reference signals using the plurality of refe