EP-4742581-A2 - CPU, RESOURCE, AND PORT OCCUPATION FOR MULTI-TRP CSI

EP4742581A2EP 4742581 A2EP4742581 A2EP 4742581A2EP-4742581-A2

Abstract

Certain aspects of the present disclosure provide techniques for channel state information (CSI) processing occupation determination that can be used even in multiple transmission reception point (mTRP) scenarios. A method that may be performed by a user equipment (UE) includes receiving a channel state information (CSI) reporting configuration configuring the UE with a plurality of CSI reference signal (CSI-RS) resources for channel measurement (CMRs). The method includes determining a number of occupied CSI processing units, a number of occupied active CSI resources, and/or a number of occupied active CSI-RS ports based on an actual number of CSI measurements. The method includes performing CSI measurement based on the determination.

Inventors

HAO, Chenxi
ZHANG, XIAOXIA
ZHANG, YU
WEI, CHAO
WU, Liangming
LI, QIAOYU
XU, HAO
CHERAGHI, Parisa
XIAO, LEI
KHOSHNEVISAN, Mostafa

Assignees

QUALCOMM Incorporated

Dates

Publication Date: 20260513
Application Date: 20200203

Claims (12)

A method for wireless communication by a user equipment, UE, the method comprising: receiving a channel state information, CSI, reporting configuration configuring the UE with a CSI reference signal, CSI-RS, resource set including a plurality of groupings of CSI-RS resources for channel measurement, CMRs; determining at least one of: a number of occupied CSI processing units, a number of occupied active CSI-RS resources, or a number of occupied active CSI-RS ports, wherein the determination is based on a number of occurrences of at least one of the CMRs across the plurality of groupings of CMRs in the CSI-RS resource set; and performing CSI measurement based on the determination.
The method of claim 1, further comprising receiving an indicator, wherein: the indicator is associated with a plurality of codepoints; each of the plurality of codepoints is mapped to one of the plurality of groupings of CMRs; the indicator indicates a codepoint of the plurality of codepoints; and the at least one of the CMRs is mapped to the indicated codepoint.
The method of claim 2, wherein the indicator comprises a CSI resource indicator, CRI, or a rank indicator, RI, pair.
The method of claim 2, further comprising determining the number of occurrences of at least one of the CMRs across the plurality of groupings of CMRs in the CSI-RS resource set by counting a number of codepoints, of the plurality of codepoints, mapped to the at least one of the CMRs.
The method of claim 4, wherein the determination of the number of occurrences of the at least one of the CMRs is further based on a number of CSI-RS port groups and a number of transmission configuration indicator, TCI, states associated with each of the CMRs, and wherein each of the CMRs is associated with a number of occupied CSI processing units, a number of occupied active CSI-RS resources, and a number of occupied active CSI-RS ports.
The method of claim 5, wherein the determination of the number of occurrences of the at least one of the CMRs based on the number of CSI-RS port groups and the number of TCI states associated with each of the CMRs comprises: determining the number of occupied CSI processing units that the CMR is associated with is equal to a summation of the number of CSI-RS port groups and the number of CSI-RS port-group-pairs that the CMR is associated with; determining the number of occupied active CSI-RS resources that the CMR is associated with is equal to a summation of the number of CSI-RS port groups and the number of CSI-RS port group pairs that the CMR is associated with; and determining for each port within the CMR of the plurality of the CMRs, the number of occupied active CSI-RS ports that the CMR is associated with is equal to the number of CSI-RS port groups that the CMR is associated with.
The method of claim 1, wherein the determination of the at least one of: the number of occupied CSI processing units, the number of occupied active CSI resources, or the number of occupied active CSI-RS ports comprises: determining a first at least one of: number of occupied CSI processing units, number of occupied active CSI resources, or number of occupied active CSI-RS ports when the UE operates in a first frequency range; and determining a second at least one of: number of occupied CSI processing units, number of occupied active CSI resources, or number of occupied active CSI-RS ports when the UE operates in a second frequency range.
The method of claim 7, wherein the first frequency range comprises a sub-6GHz frequency range, FRI, and the second frequency range comprises a millimeter wave, mmW, frequency range, FR2.
A user equipment, UE for wireless communication, comprising: means for receiving a channel state information, CSI, reporting configuration configuring the UE with a CSI reference signal, CSI-RS, resource set including a plurality of groupings of CSI-RS resources for channel measurement, CMRs; means for determining at least one of: a number of occupied CSI processing units, a number of occupied active CSI-RS resources, or a number of occupied active CSI-RS ports, wherein the determination is based on a number of occurrences of at least one of the CMRs across the plurality of groupings of CMRs in the CSI-RS resource set; and means for performing CSI measurement based on the determination.
The UE of claim 9, further comprising means for performing the method of one or more of claims 1 through 8.
A computer program comprising instructions which, when the program is executed by a computer, cause the computer to: receiving a channel state information, CSI, reporting configuration configuring the UE with a CSI reference signal, CSI-RS, resource set including a plurality of groupings of CSI-RS resources for channel measurement, CMRs; determining at least one of: a number of occupied CSI processing units, a number of occupied active CSI-RS resources, or a number of occupied active CSI-RS ports, wherein the determination is based on a number of occurrences of at least one of the CMRs across the plurality of groupings of CMRs in the CSI-RS resource set; and performing CSI measurement based on the determination.
The computer program of claim 11, further comprising instructions which, when the program is executed by a computer, cause the computer to perform the method of one or more of claims 1 through 8.

Description

BACKGROUND Field of the Disclosure Aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for determining occupied channel state information (CSI) processing even in multiple transmission reception point (mTRP) scenarios. Description of Related Art Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, broadcasts, etc. These 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, etc.). Examples of such multiple-access systems include 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) systems, LTE Advanced (LTE-A) systems, 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, to name a few. 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. New radio (e.g., 5G NR) is an example of an emerging telecommunication standard. NR is a set of enhancements to the LTE mobile standard promulgated by 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 OFDMA with a cyclic prefix (CP) on the downlink (DL) and on the uplink (UL). To these ends, NR supports beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation. However, as the demand for mobile broadband access continues to increase, there exists a need for further improvements in NR and LTE technology. Preferably, these improvements should be applicable to other multi-access technologies and the telecommunication standards that employ these technologies. SUMMARY The systems, methods, and devices of the disclosure each have several aspects, no single one of which is solely responsible for its desirable attributes. Without limiting the scope of this disclosure as expressed by the claims which follow, some features will now be discussed briefly. After considering this discussion, and particularly after reading the section entitled "Detailed Description" one will understand how the features of this disclosure provide advantages that include improved channel state information (CSI) processing occupation determination, that can be used even in multiple transmission reception point (mTRP) scenarios Certain aspects of the subject matter described in this disclosure can be implemented in a method for wireless communication by a user equipment (UE). The method generally includes receiving a CSI reporting configuration configuring the UE with a plurality of CSI reference signal (CSI-RS) resources for channel measurement (CMRs). The method generally includes determining at least one of: a number of occupied CSI processing units, a number of occupied active CSI resources, or a number of occupied active CSI-RS ports based on an actual number of CSI measurements. The method generally includes performing CSI measurement based on the determination. Certain aspects of the subject matter described in this disclosure can be implemented in a method for wireless communication by a base station (BS). The method generally includes sending a UE a CSI reporting configuration configuring the UE with a plurality of CMRs. The method generally includes determining at least one of: a number of occupied CSI processing units, a number of occupied active CSI resources, or a number of occupied active CSI-RS ports based on an actual number of CSI measurements. The method generally includes receiving a CSI report based on the determination Aspects of the present disclosure provide means for, apparatus, processors, and computer-readable mediums for performing the methods described herein. To the accomplishment of the foregoing and related ends, the one or more aspects comprise the features hereinafter fully described and particularly pointed out in the claims. The following description and the appended drawings set forth in detail certain illustrative features of the one or more aspects. These features are indicative, however, of but a few of the various ways in which the principles of various aspects may be employed. BRIEF DESCRIPTION OF THE DRAWINGS So that the manner in which the above-recited features of the present disclosure can be understood in detail, a more particular description, briefly summarized above, may be had by refe