CSI Reference Signal Capability Report for Multi-Transmit and Receive Point Channel State Information (CSI) Measurement

Abstract

Aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine one or more CSI reference signal (CSI-RS) capabilities associated with multi-transmit receive point (multi-TRP) channel state information (CSI) measurements, each CSI-RS capability indicating at least one of a number of active CSI-RS resources or a number of active CSI-RS ports supported by the UE for multi-TRP CSI measurements. The UE may transmit an indication of the one or more CSI-RS capabilities associated with multi-TRP CSI measurements. Numerous other aspects are provided.

Description

Technical Field

[0001] Broadly speaking, aspects of the present disclosure relate to wireless communication, and more specifically, aspects of the present disclosure relate to techniques and apparatus for CSI reference signal (CSI-RS) capability reporting for multi-transmit receive point (multi-TRP) channel state information (CSI) measurement. Background Art

[0002] Wireless communication systems have been widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasting. A typical wireless communication system may employ a multiple access technology that is capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). 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 / Advanced LTE is an enhanced collection of the Universal Mobile Telecommunications System (UMTS) mobile standards promulgated by the 3rd Generation Partnership Project (3GPP).

[0003] A wireless network may include multiple base stations (BSs), where a BS is capable of supporting communication for multiple user equipments (UEs). A user equipment (UE) may communicate with a base station (BS) via a downlink and an 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 further described in detail herein, a BS may be referred to as a Node B, gNB, access point (AP), radio head, transmit receive point (TRP), New Radio (NR) BS, 5G Node B, etc.

[0004] The above multiple access techniques have been adopted in various telecommunication standards to provide a common protocol that enables different user devices to communicate over a city, a country, a region, or even a global scale. New Radio (NR, which may also be referred to as 5G) is an evolved collection of the LTE mobile standard released by the 3rd Generation Partnership Project (3GPP). NR is designed to better integrate with other open standards by improving spectral efficiency, reducing costs, enhancing services, making full use of new spectrums, using Orthogonal Frequency Division Multiplexing (OFDM) with Cyclic Prefix (CP) (CP-OFDM) on the Downlink (DL), and using CP-OFDM and / or SC-FDM (e.g., also referred to 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, to better support mobile broadband Internet access. With the continuous increase in the demand for mobile broadband access, it is still useful to further improve LTE, NR, and other radio access technologies. BRIEF DESCRIPTION OF THE DRAWINGS

[0005] To understand the above-described features of the present disclosure in detail, the present application provides a more specific description of some aspects with reference to the above brief summary, some of which are illustrated in the accompanying drawings. However, it should be noted that since the description may admit other equivalent effective aspects, these drawings only depict some typical aspects of the present disclosure and should not be considered as a limitation on the scope of protection. The same reference numerals in different drawings may identify the same or similar elements.

[0006] Figure 1 is a schematic diagram showing an example of a wireless network according to various aspects of the present disclosure.

[0007] Figure 2 is a schematic diagram showing an example of communication between a base station and a UE in a wireless network according to various aspects of the present disclosure.

[0008] Figure 3 shows an example logical architecture of a distributed Radio Access Network (RAN) according to various aspects of the present disclosure.

[0009] Figure 4 is a schematic diagram showing an example of multi-Transmit Receive Point (multi-TRP) communication according to various aspects of the present disclosure.

[0010] Figure 5 is a schematic diagram showing an example of a Channel State Information (CSI) Reference Signal (CSI-RS) beam management process according to various aspects of the present disclosure.

[0011] Figure 6is a schematic diagram showing examples associated with CSI-RS capability reporting for multi-TRP CSI measurement in accordance with various aspects of the present disclosure.

[0012] Figure 7 and 8 is a schematic diagram showing an example process associated with CSI-RS capability reporting for multi-TRP CSI measurement in accordance with various aspects of the present disclosure.

[0013] Figure 9 and Figure 10 is a block diagram of an example apparatus for wireless communication in accordance with various aspects of the present disclosure. SUMMARY

[0014] In some aspects, a method of wireless communication performed by a user equipment (UE) includes: determining one or more CSI reference signal (CSI-RS) capabilities associated with multi-transmit receive point (multi-TRP) channel state information (CSI) measurement, each CSI-RS capability indicating at least one of the number of active CSI-RS resources or the number of active CSI-RS ports supported by the UE for multi-TRP CSI measurement; and transmitting an indication of the one or more CSI-RS capabilities associated with multi-TRP CSI measurement.

[0015] In some aspects, a method of wireless communication performed by a base station includes: receiving from a UE an indication of one or more CSI-RS capabilities of the UE associated with multi-TRP CSI measurement, each CSI-RS capability of the UE indicating at least one of the number of active CSI-RS resources or the number of active CSI-RS ports supported by the UE for multi-TRP CSI measurement; and determining, at least in part based on the one or more CSI-RS capabilities of the UE, a CSI reporting configuration or request associated with the UE for multi-TRP CSI measurement.

[0016] In some aspects, a UE for wireless communication includes a memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to: determine one or more CSI-RS capabilities associated with multi-TRP CSI measurement, each CSI-RS capability indicating at least one of the number of active CSI-RS resources or the number of active CSI-RS ports supported by the UE for multi-TRP CSI measurement; and transmit an indication of the one or more CSI-RS capabilities associated with multi-TRP CSI measurement.

[0017] In some aspects, a base station for wireless communication includes a memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to: receive, from a UE, an indication of one or more CSI-RS capabilities of the UE associated with multi-TRP CSI measurement, each CSI-RS capability of the UE indicating at least one of the number of active CSI-RS resources or the number of active CSI-RS ports supported by the UE for multi-TRP CSI measurement; and determine, at least in part based on the one or more CSI-RS capabilities of the UE, a CSI reporting configuration or request associated with the UE for multi-TRP CSI measurement.

[0018] In some aspects, a non-transitory computer-readable medium stores a set of instructions for wireless communication, the set of instructions including one or more instructions that, when executed by one or more processors of a UE, cause the UE to perform the following operations: determine one or more CSI-RS capabilities associated with multi-TRP CSI measurement, each CSI-RS capability indicating at least one of the number of active CSI-RS resources or the number of active CSI-RS ports supported by the UE for multi-TRP CSI measurement; and send an indication of the one or more CSI-RS capabilities associated with multi-TRP CSI measurement.

[0019] In some aspects, a non-transitory computer-readable medium stores a set of instructions for wireless communication, the set of instructions including one or more instructions that, when executed by one or more processors of a base station, cause the base station to perform the following operations: receive, from a UE, an indication of one or more CSI-RS capabilities of the UE associated with multi-TRP CSI measurement, each CSI-RS capability of the UE indicating at least one of the number of active CSI-RS resources or the number of active CSI-RS ports supported by the UE for multi-TRP CSI measurement; and determine, at least in part based on the one or more CSI-RS capabilities of the UE, a CSI reporting configuration or request associated with the UE for multi-TRP CSI measurement.

[0020] In some aspects, a device for wireless communication includes: means for determining one or more CSI-RS capabilities associated with multi-transmit receive point (multi-TRP) CSI measurement, each CSI-RS capability indicating at least one of the number of active CSI-RS resources or the number of active CSI-RS ports supported by the device for multi-TRP CSI measurement; means for sending an indication of the one or more CSI-RS capabilities associated with multi-TRP CSI measurement.

[0021] In some aspects, an apparatus for wireless communication includes: a unit configured to receive an indication of one or more CSI-RS capabilities of the UE associated with multi-TRP CSI measurements from the UE, each CSI-RS capability of the UE indicating at least one of a number of active CSI-RS resources or a number of active CSI-RS ports supported by the UE for multi-TRP CSI measurements; a unit configured to determine, at least in part based on the one or more CSI-RS capabilities of the UE, a CSI reporting configuration or request associated with the UE for multi-TRP CSI measurements.

[0022] Aspects generally include methods, apparatuses, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication devices, and / or processing systems, as fully described herein with reference to the figures and the specification and as illustrated in the figures and the specification.

[0023] To better understand the following detailed description, a rather general overview of the features and technical advantages of the examples according to the present disclosure has been given above. Additional features and advantages will be described below. The disclosed concepts and specific examples can be readily used as a basis for modifying or designing other structures for the same purpose of implementing the present disclosure. These equivalent constructs do not depart from the scope of protection of the appended claims. When considering the following detailed description in conjunction with the accompanying drawings, the characteristics (regarding their organization and method of operation) of the concepts disclosed herein, as well as the associated advantages, can be better understood. Each of the accompanying drawings provided is for illustrative and descriptive purposes only and is not intended as a definition of the invention. Detailed Description

[0024] Aspects of the present disclosure are described more fully hereinafter with reference to the accompanying drawings. However, the present disclosure may be embodied in many different forms and should not be construed as limited to any specific structure or function presented throughout this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those of ordinary skill in the art. Based on the teachings herein, those of ordinary skill in the art should appreciate that the scope of the present disclosure is intended to cover any aspect of the disclosure disclosed herein, whether implemented independently or combined with any other aspect of the present disclosure. For example, an apparatus may be implemented using any number of the aspects set forth herein or a method may be practiced. Additionally, the scope of the present disclosure is intended to cover such an apparatus or method that may be implemented using other structures, functions, or structures and functions different from those set forth herein or different from those of the various aspects of the present disclosure set forth herein. It should be understood that any aspect of the disclosure disclosed herein may be embodied by one or more elements of the claims.

[0025] Some aspects of a telecommunications system are now presented with reference to various apparatuses and techniques. These apparatuses and techniques will be described in the detailed description below and depicted in the drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as "elements"). These elements may be implemented using hardware, software, or any combination thereof. Whether an element is implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system.

[0026] It should be noted that although terms typically associated with 5G or NR radio access technology (RAT) are used herein to describe aspects, aspects of the present disclosure may also be applied to other RATs (e.g., 3G RAT, 4G RAT, and / or RATs after 5G (e.g., 6G)).

[0027] Figure 1FIG. is a schematic diagram showing an example of a wireless network 100 in accordance with various aspects of the present disclosure. The wireless network 100 may be a 5G (NR) network, an LTE network, etc., or may include elements of a 5G (NR) network, an LTE network, etc. The wireless network 100 may include a plurality of base stations 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and other network entities. A base station (BS) is an entity that communicates with a user equipment (UE), and the BS may also be referred to as an NR BS, a Node B, a gNB, a 5G Node B (NB), an access point, a transmission and reception point (TRP), etc. Each BS may provide communication coverage for a specific geographical area. In 3GPP, depending on the context in which the term "cell" is used, the term "cell" may refer to the coverage area of a BS and / or the BS subsystem serving that coverage area.

[0028] The BS may provide communication coverage for macro cells, pico cells, femto cells, and / or another type of cell. A macro cell may cover a relatively large geographical area (e.g., a radius of several kilometers) and may allow unrestricted access by UEs having a service subscription. A pico cell may cover a relatively small geographical area and may allow unrestricted access by UEs having a service subscription. A femto cell may cover a relatively small geographical area (e.g., a home) and may allow restricted access by UEs associated with the femto cell (e.g., UEs in a closed subscriber group (CSG)). The BS for a macro cell may be referred to as a macro BS. The BS for a pico cell may be referred to as a pico BS. The BS for a femto cell may be referred to as a femto BS or a home BS. In Figure 1 the example shown, BS 110a may be a macro BS for macro cell 102a, BS110b may be a pico BS for pico cell 102b, and BS 110c may be a femto BS for femto cell 102c. The BS may support one or more (e.g., three) cells. The terms "eNB", "base station", "NR BS", "gNB", "TRP", "AP", "Node B", "5G NB", and "cell" may be used interchangeably herein.

[0029] In some aspects, the cell need not be stationary, and the geographical area of the cell may move according to the position of a mobile BS. In some aspects, the BSs may use any suitable transmission network to interconnect with each other and / or to one or more other BSs or network nodes (not shown) in the wireless network 100 via various types of backhaul interfaces (e.g., direct physical connections, virtual networks, etc.).

[0030] The wireless network 100 may also include relay stations. A relay station is an entity that can receive a transmission of data from an upstream station (e.g., a BS or a UE) and send the transmission of the data to a downstream station (e.g., a UE or a BS). A relay station may also be a UE that can relay transmissions of other UEs. In Figure 1 the example shown, the relay BS 110d can communicate with the macro BS 110a and the UE 120d to facilitate communication between the BS 110a and the UE 120d. A relay BS may also be referred to as a relay station, a relay base station, a repeater, etc.

[0031] The wireless network 100 may be a heterogeneous network including different types of BSs (e.g., macro BSs, pico BSs, femto BSs, relay BSs, etc.). These different types of BSs may have different transmit power levels, different coverage areas, and different impacts on interference in the wireless network 100. For example, a macro BS may have a relatively high transmit power level (e.g., 5 to 40 watts), while pico BSs, femto BSs, and relay BSs may have relatively low transmit power levels (e.g., 0.1 to 2 watts).

[0032] The network controller 130 may be coupled to a set of BSs and provide coordination and control for these BSs. The network controller 130 may communicate with the BSs via a backhaul. These BSs may also communicate directly with each other or indirectly via a wireless backhaul or a wired backhaul.

[0033] The UEs 120 (e.g., 120a, 120b, 120c) may be dispersed throughout the wireless network 100, and each UE may be stationary or mobile. A UE may also be referred to as an access terminal, a terminal, a mobile station, a user unit, a station, etc. A UE may be a cellular phone (e.g., a smart phone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet device, a camera, a gaming device, a netbook, a smartbook, a superbook, a medical device or equipment, a biosensor / device, a wearable device (smart watch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet)), an entertainment device (e.g., a music or video device, or a satellite radio device), a vehicle-mounted component or sensor, a smart meter / sensor, an industrial manufacturing device, a global positioning system device, or any other suitable device configured to communicate via a wireless medium or a wired medium.

[0034] Some UEs can be regarded as Machine Type Communication (MTC) UEs or evolved or enhanced Machine Type Communication (eMTC) UEs. For example, MTC and eMTC UEs include robots, drones, remote devices, sensors, meters, monitors, location tags, etc. that can communicate with a base station, another device (e.g., a remote device), or some other entity. For example, a wireless node can provide a connection to or from a network (e.g., a wide area network such as the Internet or a cellular network) via a wired or wireless communication link. Some UEs can be considered Internet of Things (IoT) devices and / or can be implemented as NarrowBand IoT (NB-IoT) devices. Some UEs can be considered Customer Premises Equipment (CPE). UE 120 can be included in a housing that houses the components of UE 120 (e.g., processor components and / or memory components, etc.). In some aspects, the processor components and the memory components can be coupled together. For example, the processor components (e.g., one or more processors) and the memory components (e.g., memory) can be operatively coupled, communicatively coupled, electronically coupled, electrically coupled, etc.

[0035] Generally, in a given geographical area, any number of wireless networks can be deployed. Each wireless network can support a specific RAT and can operate on one or more frequencies. The RAT can also be referred to as radio technology, air interface, etc. The frequency can also be referred to as a carrier, frequency channel, etc. Each frequency can support a single RAT in a given geographical area to avoid interference between wireless networks of different RATs. In some cases, an NR or 5G RAT network can be deployed.

[0036] In some aspects, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) can communicate directly using one or more sidelink channels (e.g., communicate with each other without using the base station 110 as an intermediate device). For example, UE 120 can communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocols (e.g., which can include vehicle-to-vehicle (V2V) protocols, vehicle-to-infrastructure (V2I) protocols, etc.), mesh networks, etc. In this case, UE 120 can perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein that are performed by the base station 110.

[0037] Devices of the wireless network 100 can communicate using the electromagnetic spectrum, which can be subdivided into various categories, frequency bands, channels, etc. based on frequency or wavelength. For example, devices of the wireless network 100 can communicate using an operating frequency band having a first frequency range (FR1) (where FR1 can span from 410 MHz to 7.125 GHz), and / or can communicate using an operating frequency band having a second frequency range (FR2) (where FR2 can span from 24.25 GHz to 52.6 GHz). The frequencies between FR1 and FR2 are generally referred to as mid-band frequencies. Although a portion of FR1 is greater than 6 GHz, FR1 is often referred to as the "sub-6 GHz" band. Similarly, FR2 is generally referred to as the "millimeter wave" band, although it is different from the extremely high frequency (EHF) band (30 GHz - 300 GHz) recognized by the International Telecommunication Union (ITU) as the "millimeter wave" band. Thus, unless otherwise explicitly stated, it should be understood that the term "sub-6 GHz" etc. (if used herein) can broadly represent frequencies less than 6 GHz, frequencies within FR1, and / or mid-band frequencies (e.g., greater than 7.125 GHz). Similarly, unless otherwise explicitly stated, it should be understood that the term "millimeter wave" etc. (if used herein) can broadly represent frequencies within the EHF band, frequencies within FR2, and / or mid-band frequencies (e.g., less than 24.25 GHz). It is expected that the frequencies included in FR1 and FR2 can be modified, and the techniques described herein can be applied to these modified frequency ranges.

[0038] As indicated above, Figure 1 is provided as an example. Other examples may be different from the examples described with reference to Figure 1 which are described.

[0039] Figure 2 is a schematic diagram of an example 200 showing a base station 110 communicating with a UE 120 in a wireless network 100 according to various aspects of the present disclosure. The base station 110 can be equipped with T antennas 234a to 234t, and the UE 120 can be equipped with R antennas 252a to 252r, where generally T≥1, and R≥1.

[0040] At base station 110, transmit processor 220 may receive data for one or more UEs from data source 212, select one or more modulation and coding schemes (MCSs) for a UE at least in part based on channel quality indicators (CQIs) received from each UE, process (e.g., encode and modulate) the data for the UE at least in part based on the selected MCS for each UE, and provide data symbols for all UEs. Transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI), etc.) and control information (e.g., CQI requests, grants, and / or upper layer signaling, etc.), and provide overhead symbols and control symbols. Transmit processor 220 may also generate reference symbols for reference signals (e.g., cell-specific reference signals (CRSs), demodulation reference signals (DMRSs), etc.) and synchronization signals (e.g., primary synchronization signal (PSS) or secondary synchronization signal (SSS)). Transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on the data symbols, control symbols, overhead symbols, and / or reference symbols (if applicable), and may provide T output symbol streams to T modulators (MODs) 232a through 232t. Each modulator 232 may process its respective output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator 232 may further process (e.g., convert to an analog signal, amplify, filter, and up-convert) the output sample stream to obtain a downlink signal. The T downlink signals from modulators 232a through 232t may be transmitted via T antennas 234a through 234t, respectively.

[0041] At the UE 120, antennas 252a through 252r may receive downlink signals from the base station 110 and / or other base stations and may provide the received signals to demodulators (DEMOD) 254a through 254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, down-convert, and digitize) the received signal to obtain input samples. Each demodulator 254 may further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. The MIMO detector 256 may obtain the received symbols from all R demodulators 254a through 254r, perform MIMO detection on the received symbols (if applicable), and provide the detected symbols. The receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide the decoded data for the UE 120 to the data sink 260, and provide the decoded control information and system information to the controller / processor 280. The term "controller / processor" may refer to one or more controllers, one or more processors, or a combination thereof. The channel processor may determine the reference signal received power (RSRP), received signal strength indicator (RSSI), reference signal received quality (RSRQ), channel quality indicator (CQI), etc. In some aspects, one or more components of the UE 120 may be included in the housing 284.

[0042] The network controller 130 may include a communication unit 294, a controller / processor 290, and a memory 292. For example, the network controller 130 may include one or more devices in a core network. The network controller 130 may communicate with the base station 110 via the communication unit 294.

[0043] On the uplink, at the UE 120, the transmit processor 264 may receive data from the data source 262 and control information (e.g., for reporting including RSRP, RSSI, RSRQ, CQI, etc.) from the controller / processor 280 and process the data and control information. The transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be precoded (if applicable) by the TX MIMO processor 266, further processed (e.g., for DFT-s-OFDM, CP-OFDM, etc.) by the modulators 254a through 254r, and sent back to the base station 110. In some aspects, the UE 120 includes a transceiver. The transceiver may include any combination of the antennas 252, modulators and / or demodulators 254, MIMO detector 256, receive processor 258, transmit processor 264, and / or TX MIMO processor 266. The processor (e.g., controller / processor 280) and the memory 282 may use the transceiver to perform aspects of any of the methods described herein (e.g., as referencedFigures 6 - 8 as described

[0044] At base station 110, uplink signals from UE 120 and other UEs can be received by antenna 234, processed by demodulator 232, detected by MIMO detector 236 (if applicable), and further processed by receive processor 238 to obtain decoded data and control information transmitted by UE 120. Receive processor 238 can provide the decoded data to data sink 239 and the decoded control information to controller / processor 240. Base station 110 can include communication unit 244 and can communicate with network controller 130 via communication unit 244. Base station 110 can include scheduler 246 to schedule UE 120 for downlink and / or uplink communication. In some aspects, base station 110 includes a transceiver. The transceiver can include any combination of antenna 234, modulator and / or demodulator 232, MIMO detector 236, receive processor 238, transmit processor 220, and / or TX MIMO processor 230. A processor (e.g., controller / processor 240) and memory 242 can use the transceiver to perform aspects of any method described herein (e.g., as referenced Figures 6 - 8 as described

[0045] Controller / processor 240 of base station 110, controller / processor 280 of UE 120, and / or Figure 2 any other component of can perform one or more techniques associated with CSI reference signal (CSI-RS) capability reporting for multi-transmit receive point (multi-TRP) channel state information (CSI) measurements, as further described in detail elsewhere herein. For example, controller / processor 240 of base station 110, controller / processor 280 of UE 120, and / or Figure 2 any other component of can perform or direct the operation of, for example Figure 7 process 700 of Figure 8 process 800 of, and / or other processes as described herein. Memories 242 and 282 can store data and program codes for base station 110 and UE 120, respectively. In some aspects, memories 242 and / or 282 can include non-transitory computer-readable media storing one or more instructions (e.g., code, program code, etc.) for wireless communication. For example, when the one or more instructions are executed by one or more processors of base station 110 and / or UE120 (e.g., directly, or after compilation, conversion, interpretation, etc.), it may cause one or more processors, UE 120, and / or base station 110 to perform or direct the operation of, for example Figure 7 process 700 of Figure 8the operations of process 800 and / or other processes described herein. In some aspects, executing instructions can include running instructions, transforming instructions, compiling instructions, interpreting instructions, and the like.

[0046] In some aspects, UE 120 includes units for determining one or more CSI-RS capabilities associated with multi-TRP CSI measurements, each CSI-RS capability indicating at least one of the number of active CSI-RS resources or the number of active CSI-RS ports supported by the UE for multi-TRP CSI measurements, where the multi-TRP CSI measurements include one or more CSI measurements using at least two CSI port groups associated with different transmission configuration indicator (TCI) states or at least two CSI resources associated with different TCI states, where the first CSI port group or the first CSI resource associated with the first TCI state is associated with transmissions from a first TRP, and the second CSI port group or the second CSI resource associated with the second TCI state is associated with transmissions from a second TRP; and / or units for sending an indication of one or more CSI-RS capabilities associated with multi-TRP CSI measurements. The units for UE 120 to perform the operations described herein can include, for example, antenna 252, demodulator 254, MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, modulator 254, controller / processor 280, and / or memory 282.

[0047] In some aspects, UE 120 includes units for determining at least one of the following: the number of ports per TRP supported by the UE for multi-TRP CSI measurements, the number of multi-TRP CSI hypotheses supported by the UE for multi-TRP CSI measurements, or the total number of ports supported by the UE for multi-TRP CSI measurements.

[0048] In some aspects, UE 120 includes units for determining at least one of the following: the number of ports per CSI-RS resource supported by the UE for multi-TRP CSI measurements, or the number of ports per CSI-RS port group supported by the UE for multi-TRP CSI measurements. In some aspects, UE 120 includes units for determining at least one of the following: the number of CSI-RS resources supported by the UE for multi-TRP CSI measurements, the number of CSI-RS port group pairs supported by the UE for multi-TRP CSI measurements, or the number of CSI-RS resource pairs supported by the UE for multi-TRP-CSI measurements.

[0049] In some aspects, UE 120 includes a unit for determining one or more codebook types supported by the UE; a unit for determining, for each of the one or more codebook types, one or more CSI-RS capabilities associated with multi-TRP CSI measurement; and / or a unit for transmitting one or more CSI-RS capabilities for each codebook type.

[0050] In some aspects, UE 120 includes: a unit for determining one or more sets of concurrent codebooks supported by the UE, where a set of concurrent codebooks included in the one or more sets of concurrent codebooks includes two or more codebooks, and an indication of whether the set of concurrent codebooks is associated with single-TRP communication or multi-TRP communication, where the CSI-RS associated with the two or more codebooks will be counted as active CSI-RS resources and CSI-RS ports simultaneously in a time slot; and / or a unit for determining, for each set of concurrent codebooks included in the one or more sets of concurrent codebooks, one or more CSI-RS capabilities associated with multi-TRP CSI measurement. In some aspects, UE 120 includes: a unit for transmitting an indication of one or more sets of concurrent codebooks supported by the UE; and / or a unit for transmitting, for each set of concurrent codebooks included in the one or more sets of concurrent codebooks, an indication of the one or more CSI-RS capabilities.

[0051] In some aspects, UE 120 includes: a unit for determining a set of codebook pairs associated with multi-TRP communication supported by the UE; and / or a unit for determining, for each codebook pair included in the set of codebook pairs, one or more CSI-RS capabilities associated with multi-TRP CSI measurement. In some aspects, UE 120 includes: a unit for determining a codebook pair that includes a first codebook to be used by a first TRP associated with multi-TRP communication and a second codebook to be used by a second TRP associated with multi-TRP communication. In some aspects, UE 120 includes: a unit for transmitting an indication of the set of codebook pairs supported by the UE; and / or a unit for transmitting, for each set of codebook pairs supported by the UE, one or more CSI-RS capabilities associated with multi-TRP CSI measurement.

[0052] In some aspects, the UE 120 includes: a unit for determining one or more sets of concurrent codebooks supported by the UE, where a concurrent codebook set included in the one or more sets of concurrent codebooks includes two or more codebooks, and an indication of whether the concurrent codebook set is associated with single-TRP communication or multi-TRP communication, where the associated CSI-RS of the two or more codebooks will count as active CSI-RS resources and CSI-RS ports simultaneously in a time slot, and at least one of the two or more codebooks is a codebook pair; and / or a unit for determining, for each concurrent codebook set included in the one or more sets of concurrent codebooks, one or more CSI-RS capabilities associated with multi-TRP CSI measurement. In some aspects, the UE 120 includes: a unit for sending an indication of the one or more sets of concurrent codebooks supported by the UE; and / or a unit for sending, for each concurrent codebook set included in the one or more sets of concurrent codebooks, an indication of the one or more CSI-RS capabilities.

[0053] In some aspects, the UE 120 includes: a unit for determining one or more CSI-RS capabilities of each frequency band supported by the UE and associated with multi-TRP CSI measurement. In some aspects, the UE 120 includes: a unit for determining one or more CSI-RS capabilities of each frequency band combination supported by the UE and associated with multi-TRP CSI measurement.

[0054] In some aspects, the UE 120 includes: a unit for receiving a CSI-RS report configuration or request for multi-TRP CSI measurement, where the CSI-RS report configuration or request is at least partially based on an indication of one or more CSI-RS capabilities associated with multi-TRP CSI measurement, and the CSI-RS report configuration or request indicates at least one of one or more CSI-RS resources, one or more CSI-RS ports, or one or more CSI-RS port groups. In some aspects, the UE 120 includes: a unit for determining CSI-RS resources, and CSI-RS ports for multiple multi-TRP CSI hypotheses; and / or a unit for determining, based on the number of multi-TRP CSI hypotheses, the number of active resources and the number of active ports for the CSI-RS resources and CSI-RS ports.

[0055] In some aspects, UE 120 includes: a unit for sending an indication of one or more scaling factors associated with one or more CSI-RS capabilities (reported as defined or otherwise fixed in a wireless communication standard such as the 3GPP specification, which may indicate CSI-RS capabilities for single-TRP CSI or multi-TRP CSI without distinguishing between single-TRP CSI measurements and multi-TRP measurements), where the scaling factor indicates: the number of times a CSI-RS resource or CSI-RS port is counted towards the number of active CSI-RS resources or active CSI-RS ports when the UE is used for multi-TRP CSI measurements. In some aspects, UE 120 includes: a unit for sending an indication of the scaling factor to be applied when a CSI-RS resource or CSI-RS port is used for both single-TRP CSI measurements and multi-TRP CSI measurements. In some aspects, UE 120 includes: a unit for sending an indication of the scaling factor to be applied when a CSI-RS resource or CSI-RS port is used for multi-TRP CSI measurements. In some aspects, UE 120 includes: a unit for sending an indication of at least one of the following: a set of scaling factors for each codebook supported by the UE 120, or a set of scaling factors for each set of concurrent codebooks supported by the UE 120.

[0056] In some aspects, UE 120 includes: a unit for determining a set of scaling factors for at least one of the following: each codebook type supported by the UE 120, each set of concurrent codebooks supported by the UE 120, a subset of codebook types from all codebook types supported by the UE 120, or a subset of sets of concurrent codebooks from all sets of concurrent codebooks supported by the UE 120, where the number of scaling factors included in the set of scaling factors is equal to the number of CSI-RS capabilities reported by the UE 120; a unit for determining the order of the set of scaling factors based at least in part on a one-to-one mapping between each scaling factor included in the set of scaling factors and each CSI-RS capability reported by the UE 120; and / or a unit for sending an indication of at least one of the following: a set of scaling factors for each codebook supported by the UE 120, or a set of scaling factors for each set of concurrent codebooks supported by the UE 120.

[0057] In some aspects, the base station 110 (e.g., a TRP) includes: a unit for receiving an indication of one or more CSI-RS capabilities of the UE associated with multi-TRP CSI measurements, where each CSI-RS capability of the UE indicates at least one of the number of active CSI-RS resources or the number of active CSI-RS ports supported by the UE for multi-TRP CSI measurements; and / or a unit for determining, at least in part based on the one or more CSI-RS capabilities of the UE, a CSI reporting configuration or request associated with the UE for multi-TRP CSI measurements. The units for the base station 110 to perform the operations described herein may include, for example, a transmit processor 220, a TX MIMO processor 230, a modulator 232, an antenna 234, a demodulator 232, a MIMO detector 236, a receive processor 238, a controller / processor 240, a memory 242, and / or a scheduler 246.

[0058] In some aspects, the base station 110 includes: a unit for receiving an indication of at least one of the following: the number of ports of each TRP supported by the UE for multi-TRP CSI measurements, the number of multi-TRP CSI assumptions supported by the UE for multi-TRP CSI measurements, or the total number of ports supported by the UE for multi-TRP CSI measurements.

[0059] In some aspects, the base station 110 includes: a unit for receiving an indication of one or more codebook types supported by the UE; and / or a unit for, for each of the one or more codebook types, one or more CSI-RS capabilities associated with multi-TRP CSI measurements.

[0060] In some aspects, the base station 110 includes: a unit for receiving an indication of one or more sets of concurrent codebooks supported by the UE, where a set of concurrent codebooks included in the one or more sets of concurrent codebooks includes two or more codebooks and an indication of whether the set of concurrent codebooks is associated with single-TRP communication or multi-TRP communication; and / or a unit for, for each set of concurrent codebooks included in the one or more sets of concurrent codebooks, receiving an indication of one or more CSI-RS capabilities of the UE associated with multi-TRP CSI measurements.

[0061] In some aspects, the base station 110 includes: a unit for receiving an indication of a set of codebook pairs associated with multi-TRP communication supported by the UE; and / or a unit for, for each codebook pair included in the set of codebook pairs, receiving an indication of one or more CSI-RS capabilities of the UE associated with multi-TRP CSI measurements.

[0062] In some aspects, base station 110 includes: a unit for receiving one or more sets of concurrent codebooks supported by a UE, wherein a set of concurrent codebooks included in the one or more sets of concurrent codebooks includes two or more codebooks, and an indication of whether the set of concurrent codebooks is associated with single-TRP communication or multi-TRP communication, wherein CSI-RSs associated with the two or more codebooks will be counted as active CSI-RS resources and CSI-RS ports simultaneously in a time slot, and at least one of the two or more codebooks is a codebook pair; and / or a unit for receiving an indication of one or more CSI-RS capabilities of the UE associated with multi-TRP CSI measurement, corresponding to each set of concurrent codebooks in the one or more sets of concurrent codebooks supported by the UE.

[0063] In some aspects, base station 110 includes: a unit for receiving an indication of one or more CSI-RS capabilities of the UE for each frequency band supported by the UE, associated with multi-TRP CSI measurement. In some aspects, base station 110 includes: a unit for receiving an indication of one or more CSI-RS capabilities of the UE for each combination of frequency bands supported by the UE, associated with multi-TRP CSI measurement.

[0064] In some aspects, base station 110 includes: a unit for sending to the UE a CSI-RS report configuration or request for multi-TRP CSI measurement, the CSI-RS report configuration or request indicating at least one of the following: one or more CSI-RS resources, one or more CSI-RS ports, or one or more CSI-RS port groups.

[0065] In some aspects, base station 110 includes: a unit for determining the number of CSI-RS resources and the number of CSI-RS ports used by the UE to perform multi-TRP CSI measurement; a unit for comparing the number of CSI-RS resources and the number of CSI-RS ports with the CSI-RS capabilities of the UE associated with multi-TRP CSI measurement; and / or a unit for determining, at least in part based on comparing the number of CSI-RS resources and the number of CSI-RS ports with the CSI-RS capabilities of the UE associated with multi-TRP CSI measurement, a CSI report configuration or scheduling for multi-TRP CSI measurement associated with the UE.

[0066] In some aspects, base station 110 includes a unit for receiving from a UE an indication of one or more scaling factors associated with one or more CSI-RS capabilities of the UE, where the scaling factor indicates the number of times a CSI-RS resource or CSI-RS port is counted towards the number of active CSI-RS resources or active CSI-RS ports when the UE is used for multi-TRP CSI measurement. In some aspects, base station 110 includes a unit for receiving from a UE an indication of a scaling factor that will be applied if the UE uses a CSI-RS resource or CSI-RS port for both single-TRP CSI measurement and multi-TRP CSI measurement. In some aspects, base station 110 includes a unit for receiving from a UE an indication of a scaling factor that will be applied if the UE uses a CSI-RS resource or CSI-RS port for multi-TRP CSI measurement.

[0067] In some aspects, base station 110 includes a unit for receiving from a UE an indication of at least one of: a set of scaling factors for each codebook supported by the UE, or a set of scaling factors for each set of concurrent codebooks supported by the UE. In some aspects, base station 110 includes a unit for receiving an indication of one or more scaling factors for each CSI-RS capability of the UE.

[0068] In some aspects, base station 110 includes a unit for determining the number of active CSI-RS resources or active CSI-RS ports associated with a UE, where determining a CSI reporting configuration for multi-TRP CSI measurement associated with the UE is at least partially based on the number of active CSI-RS resources or active CSI-RS ports associated with the UE.

[0069] In some aspects, base station 110 includes a unit for determining the number of multi-TRP CSI measurements performed by the UE using CSI-RS resources; and / or a unit for determining the number of active CSI-RS resources or active CSI-RS ports at least partially based on the number of multi-TRP CSI measurements performed by the UE using CSI-RS resources.

[0070] In some aspects, base station 110 includes a unit for determining the number of multi-TRP CSI measurements performed by the UE using CSI-RS resources; a unit for applying a scaling factor associated with the CSI-RS capabilities of the UE to the number of multi-TRP CSI measurements performed by the UE using CSI-RS resources; and / or a unit for determining the number of active CSI-RS resources or active CSI-RS ports at least partially based on applying the scaling factor to the number of multi-TRP CSI measurements performed by the UE using CSI-RS resources.

[0071] WhileFigure 2 The blocks in are shown as different components, but the functions described above for the blocks can be implemented in a single hardware, software, or combined component or in various combinations of components. For example, the functions described with respect to the transmit processor 264, the receive processor 258, and / or the TX MIMO processor 266 can be performed by or under the control of the controller / processor 280.

[0072] As described above, Figure 2 is provided as an example. Other examples may be different from the example described with respect to Figure 2 which is described.

[0073] Figure 3 FIG. shows an example logical architecture of a distributed radio access network (RAN) 300 in accordance with aspects of the present disclosure. The 5G access node 305 may include an access node controller 310. The access node controller 310 may be a central unit (CU) of the distributed RAN 300. In some aspects, the backhaul interface to the 5G core network 315 may terminate at the access node controller 310. The 5G core network 315 may include 5G control plane components 320 and 5G user plane components 325 (e.g., 5G gateways), and the backhaul interface for one or both of the 5G control plane and the 5G user plane may terminate at the access node controller 310. Additionally or alternatively, the backhaul interface to one or more neighboring access nodes 330 (e.g., another 5G access node 305, an LTE access node, etc.) may terminate at the access node controller 310.

[0074] The access node controller 310 may include one or more TRPs 335 and / or may communicate therewith (e.g., via an F1 control (F1-C) interface and / or an F1 user (F1-U) interface). The TRP 335 may be a distributed unit (DU) of the distributed RAN 300. In some aspects, the TRP 335 may correspond to the base station 110 described above in connection with Figure 1 which is described. For example, different TRPs 335 may be included in different base stations 110. Additionally or alternatively, multiple TRPs 335 may be included in a single base station 110. In some aspects, the base station 110 may include a CU (e.g., the access node controller 310) and / or one or more DUs (e.g., one or more TRPs 335). In some cases, the TRP 335 may be referred to as a cell, panel, antenna array, array, etc.

[0075] The TRP 335 can be connected to a single access node controller 310 or to multiple access node controllers 310. In some aspects, a dynamic configuration of split logical functions can exist within the architecture of the distributed RAN 300. For example, the packet data convergence protocol (PDCP) layer, the radio link control (RLC) layer, the media access control (MAC) layer, etc. can be configured to terminate at the access node controller 310 or the TRP 335.

[0076] In some aspects, multiple TRP 335s can use different quasi - co - location (QCL) relationships (e.g., different spatial parameters, different transmission configuration indicator (TCI) states, different precoding parameters, different beamforming parameters, etc.) to send communications (e.g., the same communication or different communications) in the same transmission time interval (TTI) (e.g., time slot, mini - slot, sub - frame, symbol, etc.) or in different TTIs. In some aspects, the TCI state can be used to indicate one or more QCL relationships. The TRP 335 can be configured to provide services to the UE 120 individually (e.g., using dynamic selection) or jointly (e.g., using joint transmission with one or more other TRP 335s).

[0077] As indicated above, Figure 3 is provided as an example. Other examples can be different from the examples described with reference to Figure 3 which.

[0078] Figure 4 is a schematic diagram showing an example 400 of multi - TRP communication according to various aspects of the present disclosure. In some aspects, multi - TRP communication can be referred to as multi - panel communication. As Figure 4 shown, the multi - TRP 405 can communicate with the same UE 120. The TRP 405 can correspond to the TRP 335 described above in connection with Figure 3 which.

[0079] Multiple TRPs 405 (shown as TRP A and TRP B) can communicate with the same UE 120 in a coordinated manner (e.g., using coordinated multi-point transmission, etc.) to improve reliability, increase throughput, etc. The TRPs 405 can coordinate such communication via an interface between the TRPs 405 (e.g., a backhaul interface, access node controller 310, etc.). When the TRPs 405 are located in the same base station 110 (e.g., when the TRPs 405 are different antenna arrays or panels of the same base station 110), this interface may have a smaller latency and / or a higher capacity, and when the TRPs 405 are located in different base stations 110, this interface may have a larger latency and / or a lower capacity (compared to co-location). Different TRPs 405 can communicate with the UE 120 using different QCL relationships (e.g., different TCI states), different demodulation reference signal (DMRS) ports, different layers (e.g., multi-layer communication), etc.

[0080] In the first multi-TRP transmission mode (e.g., mode 1), a single physical downlink control channel (PDCCH) can be used to schedule downlink data communication for a single physical downlink shared channel (PDSCH). In this case, multiple TRPs 405 (e.g., TRP A and TRP B) can send communication to the UE 120 on the same PDSCH. For example, communication can be sent using a single codeword with different spatial layers for different TRPs 405 (e.g., where one codeword is mapped to a first set of layers transmitted by a first TRP 405 and to a second set of layers transmitted by a second TRP 405). As another example, communication can be sent using multiple codewords, where different TRPs 405 send different codewords (e.g., using different sets of layers). In either case, different TRPs 405 can use different QCL relationships (e.g., different TCI states) for different DMRS ports corresponding to different layers. For example, a first TRP 405 can use a first QCL relationship or a first TCI state for a first set of DMRS ports corresponding to a first set of layers, and a second TRP 405 can use a second (different) QCL relationship or a second (different) TCI state for a second (different) set of DMRS ports corresponding to a second (different) set of layers. In some aspects, the TCI state in the downlink control information (DCI) (e.g., which is sent on a PDCCH such as DCI format 1_0, DCI format 1_1, etc.) can indicate a first QCL relationship (e.g., by indicating a first TCI state) and a second QCL relationship (e.g., by indicating a second TCI state). The TCI fields in the DCI can be used to indicate the first and second TCI states. Generally, in this multi-TRP transmission mode (e.g., mode 1), the TCI field can indicate a single TCI state (for single-TRP transmission) or multiple TCI states (for multi-TRP transmission as discussed herein).

[0081] In some aspects, a first multi-TRP transmission mode (e.g., mode 1) may be associated with a spatial division multiplexing (SDM) configuration, a single frequency network (SFN) configuration, a frequency division multiplexing (FDM) configuration, or a time division multiplexing (TDM) configuration. The SDM configuration may also be referred to as a non-coherent joint transmission (NCJT) configuration. In an SDM configuration, a first set of layers may be transmitted by a first TRP 405, and a second set of layers may be transmitted by a second TRP 405. The first set of layers and the second set of layers may be associated with the same frequency domain resource allocation and the same time domain resource allocation. Assuming that the first set of layers and the second set of layers may be associated with the same frequency domain resource allocation and the same time domain resource allocation, the UE 120 may calculate two precoder matrix indicators (PMIs) (e.g., one PMI for the first TRP 405 and one PMI for the second TRP 405). In an SDM configuration, the PDSCH transmitted by the first TRP 405 and the PDSCH transmitted by the second TRP 405 may be associated with the same frequency domain resource allocation and the same time domain resource allocation. In an SFN configuration, assuming that the first TRP 405 and the second TRP 405 use the same frequency domain resource allocation and the same time domain resource allocation to transmit the same layers, the UE 120 may calculate two PMIs (e.g., one PMI for the first TRP 405 and one PMI for the second TRP 405).

[0082] In an FDM configuration, the PDSCH (e.g., one or more layers) transmitted by the first TRP 405 and the PDSCH transmitted by the second TRP 405 may be associated with the same rank and / or codeword, but may be associated with different frequency domain resource allocations (e.g., and the same time domain resource allocation). Assuming that the first TRP 405 and the second TRP 405 use different frequency domains and the same time domain to transmit the same layers, the UE 120 may calculate two PMIs (e.g., one PMI for the first TRP 405 and one PMI for the second TRP 405). In a TDM configuration, the PDSCH transmitted by the first TRP 405 and the PDSCH transmitted by the second TRP 405 may be associated with the same rank and / or codeword, but is associated with different time domain resource allocations (e.g., and the same frequency domain resource allocation). Assuming that the first TRP 405 and the second TRP 405 use the same frequency domain and different time domains to transmit the same layers, the UE 120 may calculate two PMIs (e.g., one PMI for the first TRP 405 and one PMI for the second TRP 405).

[0083] In the second most TRP transmission mode (e.g., mode 2), multiple PDCCHs can be used to schedule downlink data communication of multiple corresponding PDSCHs (e.g., one PDCCH for each PDSCH). In this case, the first PDCCH can schedule the first codeword to be sent by the first TRP 405, and the second PDCCH can schedule the second codeword to be sent by the second TRP 405. In addition, the first DCI (e.g., sent by the first TRP 405) can schedule the first PDSCH communication associated with the first DMRS port set, which has the first QCL relationship for the first TRP 405 (e.g., indicated by the first TCI state), and the second DCI (e.g., sent by the second TRP 405) can schedule the second PDSCH communication associated with the second DMRS port set, which has the second QCL relationship for the second TRP 405 (e.g., indicated by the second TCI state). In this case, the DCI (e.g., having DCI format 1_0, DCI format 1_1, etc.) can indicate the corresponding TCI state of the TRP 405 corresponding to the DCI. The TCI field of the DCI indicates the corresponding TCI state (e.g., the TCI field of the first DCI indicates the first TCI state, and the TCI field of the second DCI indicates the second TCI state). In the second most TRP transmission mode (e.g., mode 2), the PDSCHs sent by the first TRP 405 and the PDSCHs sent by the second TRP 405 can have completely overlapping (e.g., the same), partially overlapping, or non-overlapping resource allocations (e.g., frequency domain resource allocation and / or time domain resource allocation).

[0084] As indicated above, Figure 4 is provided as an example. Other examples may be different from the examples Figure 4 described with reference to

[0085] Figure 5 is a schematic diagram showing examples 500, 510, and 520 of CSI-RS beam management procedures according to various aspects of the present disclosure. As Figure 5 shown, examples 500, 510, and 520 include a UE 120 communicating with a base station 110 in a wireless network (e.g., wireless network 100). However, Figure 5The devices shown are provided only as examples, and the wireless network may support communication and beam management between other devices (e.g., between UE 120 and base station 110 or transmission reception point (TRP), between mobile terminal nodes and control nodes, between integrated access and backhaul (IAB) sub-nodes and IAB parent nodes, between scheduled nodes and scheduling nodes, etc.). In some aspects, UE 120 and base station 110 may be in a connected state (e.g., radio resource control (RRC) connected state, etc.).

[0086] As Figure 5 shown, example 500 may include: base station 110 sending one or more CSI-RSs to UE 120. The CSI-RSs may be used for downlink channel measurements (e.g., downlink CSI acquisition), which may be used for examples such as scheduling, link adaptation, or beam management. Base station 110 may configure a CSI-RS set for UE 120, and UE 120 may measure the configured CSI-RS set. At least partially based on the measurements, UE 120 may perform CSI measurements and may report CSI parameters (e.g., in a CSI report) to base station 110, such as channel quality indicator (CQI), PMI, CSI-RS resource indicator (CRI), layer indicator (LI), rank indicator (RI), or reference signal received power (RSRP), etc. Base station 110 may use the CSI report to select transmission parameters for downlink communication to UE 120, such as the number of transmission layers (e.g., rank), precoding matrix (e.g., precoder), modulation and coding scheme (MCS), or refined downlink beam (e.g., using a beam refinement process or beam management process), etc.

[0087] In some aspects, the UE 120 may be configured with CSI-RS resource sets for performing CSI measurements for a single TRP and / or for multi-TRP (e.g., the same CSI-RS resource set may be used for single-TRP CSI measurements and for multi-TRP CSI measurements). For example, a CSI-RS reporting configuration may be associated with a first CSI-RS resource and a second CSI-RS resource (in some aspects, this CSI-RS reporting configuration may be referred to as a type 1.1 CSI-RS configuration). The first CSI-RS resource may be configured with a first TCI state and associated with a first TRP, and the second CSI-RS resource may be configured with a second TCI state and associated with a second TRP. The UE 120 may use the first CSI-RS resource to perform single-TRP CSI measurements associated with the first TRP, and / or may use the second CSI-RS resource to perform single-TRP CSI measurements associated with the second TRP. Additionally or alternatively, the UE 120 may use both the first CSI-RS resource and the second CSI-RS resource to perform multi-TRP-CSI measurements associated with multi-TRP transmissions from the first TRP and the second TRP.

[0088] In some aspects, a CSI-RS reporting configuration may be associated with a CSI-RS resource including a first port group and a second port group (in some aspects, this CSI-RS reporting configuration may be referred to as a type 1.2 CSI-RS configuration). The first port group may be associated with a first TRP, and the second port group may be associated with a second TRP. The CSI-RS resource may be associated with two TCI states (e.g., a first TCI state associated with the first TRP and a second TCI state associated with the second TRP). The UE 120 may use the CSI-RS resource, the first port group, and the first TCI state to perform single-TRP CSI measurements associated with the first TRP. Similarly, the UE 120 may use the CSI-RS resource, the second port group, and the second TCI state to perform single-TRP CSI measurements associated with the second TRP. Additionally or alternatively, the UE 120 may use both the CSI-RS resource, both the first port group and the second port group, and both the first TCI state and the second TCI state to perform multi-TRP-CSI measurements associated with multi-TRP transmissions from the first TRP and the second TRP.

[0089] In some aspects, the UE 120 may be configured with a first CSI-RS reporting configuration (e.g., via a first TRP) and a second CSI-RS reporting configuration (e.g., via a second TRP), where the first CSI-RS reporting configuration and the second CSI-RS reporting configuration are associated with each other (e.g., the first CSI-RS reporting configuration and / or the second CSI-RS reporting configuration may include references to other CSI-RS reporting configurations). In some aspects, this CSI-RS reporting configuration may be referred to as a Category 2 CSI-RS configuration. The first CSI-RS reporting configuration may indicate a first CSI-RS resource associated with the first TRP (e.g., and a first TCI state). The second CSI-RS reporting configuration may indicate a second CSI-RS resource associated with the second TRP (e.g., and a second TCI state). The UE 120 may use the first CSI-RS resource to perform single-TRP CSI measurements associated with the first TRP, and / or may use the second CSI-RS resource to perform single-TRP CSI measurements associated with the second TRP. Additionally or alternatively, the UE 120 may use both the first CSI-RS resource and the second CSI-RS resource to perform multi-TRP CSI measurements associated with multi-TRP transmissions from the first TRP and the second TRP.

[0090] In some aspects, the UE 120 may report CSI-RS capabilities that indicate the number of active CSI-RS ports and the number of active CSI-RS resources that the UE 120 can support. The active CSI-RS resources and / or active CSI-RS ports may indicate that the CSI-RS resource and / or CSI-RS port is indicated in an active CSI-RS configuration or scheduling (e.g., and can be used by the UE 120 to perform CSI measurements). In any time slot, it is expected that the UE does not have more active CSI-RS ports or active CSI-RS resources than the reported capabilities. For aperiodic CSI-RS, the associated CSI-RS resources and CSI-RS ports may be considered active during the period starting from the end of the PDCCH communication that includes a request for a CSI report from the UE 120 and ending at the end of the physical uplink shared channel (PUSCH) communication that includes the CSI report associated with the aperiodic CSI-RS. For semi-persistent CSI-RS, the associated CSI-RS resources and CSI-RS ports may be considered active during the period starting from the end of the activation command (e.g., from the end of the MAC-CE communication that activates the semi-persistent CSI-RS) and ending at the end of the deactivation command (e.g., at the end of the MAC-CE communication that deactivates the semi-persistent CSI-RS). For periodic CSI-RS, the associated CSI-RS resources and CSI-RS ports may be considered active during the period starting from the time when the periodic CSI-RS is configured (e.g., via higher layer signaling such as RRC signaling) and ending at the time when the configuration associated with the periodic CSI-RS is released.

[0091] The UE 120 may report its CSI-RS capabilities by sending an indication of the number of CSI-RS ports for each resource supported by the UE 120, the number of CSI-RS resources supported by the UE 120, and / or the total number of CSI-RS ports supported by the UE 120. The UE 120 may report a list of CSI-RS capabilities for each codebook type supported by the UE 120 and / or for each concurrent codebook combination supported by the UE 120. A concurrent codebook combination may refer to multiple codebook types having active CSI-RS resources and ports within one time slot (e.g., their associated CSI-RS will count towards active CSI-RS resources and CSI-RS ports simultaneously in the same time slot). Additionally, the UE 120 may report the CSI-RS capabilities for each codebook type and / or each concurrent codebook combination for each frequency band supported by the UE 120 and for each frequency band combination supported by the UE 120. For example, the codebook types may include Type-I single-panel codebook, Type-I multi-panel codebook, Type-II codebook, Type-II port selection codebook, eType II codebook, and / or eType II port selection codebook. The concurrent codebook combinations may include {Type-I single-panel codebook and Type-II}, {Type-I single-panel codebook and Type-II port selection}, {Type-I single-panel codebook, eType II R = 1}, {Type-I single-panel codebook, eType II port selection R = 1}, {Type-I single-panel codebook, eType II R = 2}, {Type-I single-panel codebook, eType II port selection R = 2}, and / or {Type-I single-panel codebook, Type-II and Type-II port selection}, {Type-I multi-panel codebook and Type-II}, {Type-I multi-panel codebook and Type-II port selection}, {Type-I multi-panel codebook, eType II R = 2}, {Type-I multi-panel codebook, eType II port selection R = 2}, and / or {Type-I multi-panel codebook, Type-II and Type-II port selection}, and other examples, where R is the number of PMIs per sub-band.

[0092] A network (e.g., base station 110 and / or TRP, and other examples) can determine, on a per-resource basis, active CSI-RS resources and / or active CSI-RS ports for UE 120 (e.g., the network can determine the number of active CSI-RS resources and / or active CSI-RS ports by determining the number of times a CSI-RS resource is indicated as active). However, in some aspects, as described above, a CSI-RS resource can be used multiple times (e.g., once for single-TRP CSI measurement and once for multi-TRP CSI measurement). For example, for SDM multi-TRP CSI measurement, UE 120 can use a single CSI-RS resource multiple times, but the network can count only a single CSI-RS resource as active once. Thus, the network can attempt to configure UE 120 with a CSI reporting configuration that exceeds the CSI-RS capabilities of UE 120.

[0093] In addition, multi-TRP CSI measurement involves greater complexity than single-TRP CSI measurement. Thus, counting CSI-RS resources on a per-use basis (e.g., counting a CSI-RS resource once each time it is used) may not be sufficient to determine whether the CSI-RS capabilities of UE 120 are met. For example, a single use of a CSI-RS resource for single-TRP CSI measurement may not be equivalent to a single use of a CSI-RS resource for multi-TRP CSI measurement (e.g., due to the additional complexity associated with multi-TRP CSI measurement). As a result, counting CSI-RS resources for multi-TRP CSI measurement in the same way as CSI-RS resources for single-TRP CSI measurement may not be sufficient.

[0094] Some of the techniques and apparatuses described herein implement CSI-RS capability reporting for multi-TRP CSI measurements. For example, UE 120 may report CSI-RS capabilities for multi-TRP CSI measurements. UE 120 may report a list of CSI-RS capabilities for each codebook type supported by UE 120, each concurrent codebook combination supported by UE 120, each codebook pair supported by UE 120 (a codebook pair may refer to a scenario where two TRPs use different codebook types), each concurrent codebook pair supported by UE 120, each frequency band, and / or each frequency band combination. Additionally or alternatively, UE 120 may report a scaling factor that indicates the number of times a CSI-RS resource and / or CSI-RS port will be counted towards the number of active CSI-RS resources and / or active CSI-RS ports associated with UE 120. As a result, the network may be enabled to more accurately determine the capabilities of UE 120 for multi-TRP CSI measurements. Accordingly, the network may not configure UE 120 with a CSI-RS reporting configuration that exceeds the capabilities of UE 120. This may improve the efficiency associated with multi-TRP CSI measurements because UE 120 may not be configured with a CSI reporting configuration that exceeds the capabilities of UE 120.

[0095] Figure 6 is a schematic diagram showing an example 600 associated with CSI-RS capability reporting for multi-TRP CSI measurements according to various aspects of the present disclosure. As Figure 6 shown, UE 120 may communicate with one or more TRPs (e.g., a first TRP 605a and a second TRP 605b). The first TRP 605a may be associated with a first base station 110, and the second TRP 605b may be associated with a second base station 110. In some aspects, the first TRP 605a and the second TRP 605b may be associated with the same base station 110.

[0096] As indicated by reference numeral 610, UE 120 may determine one or more CSI-RS capabilities associated with multi-TRP CSI measurements. For example, UE 120 may determine at least one of the number of active CSI-RS resources or the number of active CSI-RS ports supported by UE 120 for multi-TRP CSI measurements. In some aspects, UE 120 may determine the number of CSI-RS ports for each TRP supported by UE 120, the number of multi-TRP CSI measurements supported by UE 120 (e.g., the number of SDM multi-TRP CSI measurements supported by UE 120), and / or the total number of CSI-RS ports supported by UE 120, etc.

[0097] In some aspects, the UE 120 may determine the number of CSI-RS ports per CSI-RS resource supported, the number of CSI-RS resources, and the total number of ports supported for multi-TRP CSI measurements. For example, in the case where the CSI-RS report configuration indicates multiple CSI-RS resources for multiple TRPs (e.g., for the category 1.1 CSI-RS configuration as described above), the UE 120 may determine the number of ports per resource and the number of CSI-RS resources supported for multi-TRP CSI measurements, where the number of CSI-RS resources is a function of two, e.g., two CSI-RS resources, four CSI-RS resources, six CSI-RS resources, etc. In some aspects, the UE 120 may determine the number of resource pairs of CSI-RS supported for multi-TRP CSI measurements and the number of ports supported across all resources. In some aspects, in the case where the CSI-RS report configuration indicates a single CSI-RS resource associated with multiple TCI states (e.g., for the category 1.2 CSI-RS configuration as described above), the UE 120 may determine the number of CSI-RS ports per port group supported for multi-TRP CSI measurements (or the number of CSI-RS ports P per CSI-RS resource supported). In this case, the UE 120 may support up to P / 2 per port group. The UE 120 may support any combination of P1 ports in the first port group and P2 ports in the second port group such that P1 + P2 <= P ports), the number of CSI-RS resources, and the total number of ports supported by the UE 120 for multi-TRP CSI measurements.

[0098] In some aspects, the UE 120 may determine a list of CSI-RS capabilities for multi-TRP CSI measurements for each codebook type supported by the UE 120 (e.g., a list of CSI-RS capabilities for each codebook type). As used herein, the list of CSI-RS capabilities may include one or more CSI-RS capabilities of the UE 120. For example, the UE 120 may support multiple codebook types. The codebook types may be defined or otherwise fixed by a wireless communication standard such as the 3GPP standard. Examples of codebook types may include type-I single-panel codebook, type-I multi-panel codebook, type-II codebook, type-II port selection codebook, eType-II codebook, and / or eType-II port selection codebook, etc. The UE 120 may determine one or more CSI-RS capabilities for multi-TRP CSI measurements for each codebook type supported by the UE 120. In some aspects, the UE 120 may determine, for each list of CSI-RS capabilities associated with the supported codebook types, a list of CSI-RS capabilities for each frequency band supported by the UE 120 and / or each combination of frequency bands supported by the UE 120. The capability list may include 7 triples of {P, K, Ptot}, where, for a category 1.1 CSI-RS configuration, P is the maximum number of ports per supported resource, K is the maximum number of CSI-RS resources or CSI-RS resource pairs supported, and Ptot is the maximum number of ports across all CSI-RS resources or CSI-RS resource pairs supported. For a category 1.2 CSI-RS configuration, P is the maximum number of ports per supported port group or CSI-RS resource, K is the maximum number of CSI-RS resources supported, and Ptot is the maximum number of ports across all supported resources. These 7 triples may differ in the value of P (i.e., P = 2, 4, 8, 12, 16, 24, and / or 32), and for each P, the corresponding K and Ptot may be different. This is because the CSI measurement complexity is different for different values of P.

[0099] In some aspects, the UE 120 may determine a list of one or more codebook pairs. A codebook pair may refer to a situation where a first TRP (e.g., the first TRP 605a) and a second TRP (e.g., the second TRP 605b) use different codebooks for multi-TRP communication with the UE 120. A codebook pair may include a first codebook used by the first TRP and a second codebook used by the second TRP. The UE 120 may determine one or more codebook pairs supported by the UE 120.

[0100] The UE 120 may determine a list of CSI-RS capabilities for each codebook pair included in a list of one or more codebook pairs supported by the UE 120. For example, the UE 120 may determine, for each codebook pair, the values of the triplet {P, K, Ptot} for multi-TRP CSI measurements supported by the UE 120. In other words, if a codebook pair includes a first codebook and a second codebook, and if a first TRP and a second TRP associated with multi-TRP CSI measurements use the first codebook and the second codebook, respectively, the UE 120 may determine a list of the UE 120's CSI-RS capabilities (e.g., the number of CSI-RS ports supported by the UE 120 across the first codebook and the second codebook, the number of CSI-RS resources or resource pairs supported by the UE 120 on the first codebook and the second codebook, and / or the total number of CSI-RS ports supported by the UE 120). The UE 120 may determine, for each codebook pair, a list of CSI-RS capabilities for each frequency band supported by the UE 120 and / or each combination of frequency bands supported by the UE 120. The UE 120 may report the list of supported codebook pairs and the list of supported CSI-RS capabilities for each codebook pair, as described in more detail below.

[0101] In some aspects, the UE 120 may determine a list of one or more sets of concurrent codebooks supported by the UE 120. A set of concurrent codebooks may include multiple codebook types that the UE 120 may use over a period of time (e.g., within a time slot). That is, concurrent codebooks may be two or more codebooks whose associated CSI-RS will be counted as active CSI-RS resources and CSI-RS ports simultaneously within a time slot (e.g., the same time slot). For example, a set of concurrent codebooks may include a first codebook type and a second codebook type. Another set of concurrent codebooks may include a first codebook type, a second codebook type, and a third codebook type. In some aspects, a set of concurrent codebooks may include an indication of the codebook type and whether the codebook type is associated with single-TRP CSI measurements or multi-TRP CSI measurements. For example, a set of concurrent codebooks may include Codebook 1 and Codebook 2. Each codebook (e.g., Codebook 1 and / or Codebook 2) may indicate the codebook type associated with the codebook and whether the codebook is associated with single-TRP CSI measurements or multi-TRP CSI measurements. For example, a set of concurrent codebooks may include {Codebook 1 and Codebook 2}, {Codebook 2 and Codebook 3}, and / or {Codebook 1, Codebook 2, and Codebook 3}, among other examples. Codebook 1 may be a Type I single-panel codebook and may be associated with multi-TRP CSI measurements, Codebook 2 may be a Type II codebook and may be associated with single-TRP CSI measurements; and Codebook 3 may be a Type I codebook and may be associated with single-TRP CSI measurements.

[0102] In some aspects, the codebooks included in the concurrent codebook set can be codebook pairs, as described above. For example, the concurrent codebook set can include a first codebook type and a second codebook type. The first codebook type can be a codebook pair (e.g., two codebook types for multi-TRP communication by two TRPs), and the second codebook can be a second codebook type (e.g., for a single TRP and / or multi-TRP). For example, the concurrent codebook set can include {codebook 1 and codebook 2}, {codebook 2 and codebook 3}, and / or {codebook 1, codebook 2, and codebook 3}, among other examples. Codebook 1 can be a codebook pair including codebook type 1 and codebook type 2 and associated with multi-TRP CSI measurement, codebook 2 can be a type II codebook and can be associated with single-TRP CSI measurement, and codebook 3 can be a type II codebook and can be associated with multi-TRP CSI measurement.

[0103] UE 120 can determine a list of CSI-RS capabilities for each concurrent codebook set included in a list of one or more sets of concurrent codebooks supported by UE 120. For example, UE 120 can determine, for each concurrent codebook set, the number of active CSI-RS resources or the number of active CSI-RS ports supported by UE 120 for multi-TRP CSI measurement. In other words, if the concurrent codebook set includes a first codebook and a second codebook, and if UE 120 uses the first codebook and the second codebook simultaneously, then UE 120 can determine a list of UE 120's CSI-RS capabilities (e.g., the number of CSI-RS ports supported by UE 120 across the first codebook and the second codebook, the number of CSI-RS resources supported by UE 120 across the first codebook and the second codebook, and / or the total number of CSI-RS ports supported by UE 120). UE 120 can make the determination and reporting for the list of CSI-RS capabilities associated with the concurrent codebook set. UE 120 can determine a list of CSI-RS capabilities for each concurrent codebook set for each frequency band supported by UE 120. In some aspects, UE 120 can determine a list of CSI-RS capabilities for each concurrent codebook set for each frequency band combination supported by UE 120.

[0104] In some aspects, for a CSI-RS capability list (e.g., any one of the CSI-RS capability lists described herein, such as the CSI-RS capability list for each codebook type, the CSI-RS capability list for each codebook pair, and / or the CSI-RS capability list for each concurrent codebook set, and other examples), UE 120 may determine a list of CSI-RS capabilities associated with an SDM multi-TRP configuration, an SFN multi-TRP configuration, an FDM multi-TRP configuration, and / or a TDM multi-TRP configuration. That is, UE 120 may determine a list of CSI-RS capabilities for an SDM multi-TRP configuration, an FDM multi-TRP configuration, and / or a TDM multi-TRP configuration, respectively.

[0105] In some aspects, UE 120 may determine one or more scaling factors associated with the CSI-RS capabilities. The scaling factor may indicate the number of times that a CSI-RS resource or a CSI-RS port will be counted towards the number of active CSI-RS resources or active CSI-RS ports when UE 120 is used for multi-TRP CSI measurements (e.g., performed by the network). For example, the scaling factor N may indicate that the CSI-RS resources and / or CSI-RS ports corresponding to the CSI-RS capabilities associated with the scaling factor are counted N times. In some aspects, UE 120 may determine one or more scaling factors associated with the CSI-RS capabilities to indicate the reporting of multi-TRP CSI capabilities (e.g., instead of determining and reporting different multi-TRP CSI capabilities as described above). The CSI-RS capabilities associated with one or more scaling factors may be defined by a wireless communication standard (e.g., 3GPP specification) or otherwise fixed. In other words, the CSI-RS capabilities associated with one or more scaling factors may be applied to both single-TRP CSI measurements and multi-TRP CSI measurements (e.g., the CSI-RS capabilities may not distinguish between single-TRP CSI measurements and multi-TRP CSI measurements). For example, UE 120 may determine and report a list of CSI-RS capabilities for each codebook type and / or concurrent codebook set supported by the UE 120. UE 120 may determine one or more scaling factors associated with each reported CSI-RS capability (e.g., using a one-to-one mapping between the reported list of scaling factors and the single-TRP CSI-RS capability list of UE 120).

[0106] In some aspects, the scaling factor may be associated with CSI-RS resources and / or CSI-RS ports for both single-TRP CSI measurements and multi-TRP CSI measurements. That is, if the CSI-RS resources and / or CSI-RS ports corresponding to the CSI-RS capabilities associated with the scaling factor are used for both single-TRP CSI measurements and multi-TRP CSI measurements, the scaling factor may indicate the value N to be applied (if these resources and ports are used for both single-TRP CSI measurements and multi-TRP CSI measurements, they are to be counted N times). In some aspects, the scaling factor may be associated with CSI-RS resources and / or CSI-RS ports as multi-TRP CSI measurements. That is, if the CSI-RS resources and / or CSI-RS ports corresponding to the CSI-RS capabilities associated with the scaling factor are used for multi-TRP CSI measurements, the scaling factor may indicate the value N to be applied (if these resources and ports are used for multi-TRP CSI measurements in addition to single-TRP CSI measurements, they are to be counted N times). Further, if the CSI-RS resources and the CSI-RS ports within the resources are used for M multi-TRP CSI measurements, the CSI-RS resources and CSI-RS ports may be counted N*M times (e.g., counted into the number of active CSI-RS resources and active CSI-RS ports associated with UE 120).

[0107] As shown by reference numeral 615, UE 120 may send an indication of one or more CSI-RS capabilities associated with multi-TRP CSI measurements. For example, UE 120 may send a report indicating one or more CSI-RS capabilities for each codebook type supported by UE 120 (e.g., each CSI-RS capability indicates the number of active CSI-RS ports supported by UE 120, the number of active CSI-RS resources supported by UE 120, and / or the total number of CSI-RS ports supported by UE 120). UE 120 may send a report indicating a list of CSI-RS capabilities for each codebook pair supported by UE 120. UE 120 may send a report that indicates a list of CSI-RS capabilities for each concurrent codebook set supported by UE 120. In some aspects, UE 120 may send an indication of a list of one or more codebook pairs supported by the UE 120 and / or a list of one or more sets of concurrent codebooks supported by the UE 120.

[0108] For any list of CSI-RS capabilities, the UE 120 may report a list of CSI-RS capabilities per band and / or per band combination (e.g., the list of CSI-RS capabilities may indicate different capabilities for different bands and / or different band combinations). Similarly, for any list of CSI-RS capabilities, the UE 120 may report a list of CSI-RS capabilities for SDM multi-TRP configurations, FDM multi-TRP configurations, and / or TDM multi-TRP configurations (e.g., the list of CSI-RS capabilities may indicate different capabilities for different multi-TRP configurations).

[0109] In some aspects, the UE 120 may send an indication of a set of one or more scaling factors associated with one or more CSI-RS capabilities. For example, if the UE 120 sends one or more CSI-RS capabilities associated with one or more codebook types, the UE 120 may send a set of scaling factors corresponding to the set of CSI-RS capabilities (e.g., a first CSI-RS capability included in the one or more CSI-RS capabilities may correspond to a first scaling factor included in the one or more scaling factors).

[0110] As shown by reference numeral 620, the first TRP 605a and / or the second TRP 605b may determine a CSI reporting configuration or request / scheduling for multi-TRP CSI measurements associated with the UE 120, at least in part based on the CSI-RS capabilities reported by the UE 120. For example, the first TRP 605a and / or the second TRP 605b may determine applicable CSI-RS capabilities for the UE 120 for multi-TRP CSI measurements (e.g., at least in part based on a codebook type associated with the multi-TRP CSI measurement, a codebook pair associated with the multi-TRP CSI measurement, a set of concurrent codebooks associated with the multi-TRP CSI measurement, a set of concurrent codebook pairs associated with the multi-TRP CSI measurement, a multi-TRP configuration associated with the multi-TRP CSI measurement (e.g., SDM, FDM, or TDM), a band associated with the multi-TRP CSI measurement, and / or a band combination associated with the multi-TRP CSI measurement, etc.).

[0111] The first TRP 605a and / or the second TRP 605b may determine the number of active CSI-RS resources and / or the number of active CSI-RS ports associated with the UE 120. For example, the first TRP 605a and / or the second TRP 605b may determine the number of CSI measurements performed by the UE 120 over a period of time (e.g., a time slot). The first TRP 605a and / or the second TRP 605b may count the CSI-RS resources and / or CS-RS ports used for multi-TRP CSI measurements towards the number of active CSI-RS resources and / or the number of active CSI-RS ports (e.g., rather than the number of CSI reporting configurations indicating the CSI-RS resources and / or CSI-RS ports) at least partially based on the number of multi-TRP CSI measurements performed by the UE 120 using the CSI-RS resources and / or CSI-RS ports.

[0112] In some aspects, the first TRP 605a and / or the second TRP 605b may apply a scaling factor (e.g., associated with the determined CSI-RS capability) to the number of times the CSI-RS resources and / or the number of times the CSI-RS ports that the UE 120 has used for multi-TRP CSI measurements to determine the number of active CSI-RS resources and / or the number of active CSI-RS ports associated with the UE 120. For example, if the scaling factor indicates a value of 4 and the UE 120 uses the CSI-RS resources for multi-TRP CSI measurements once, the first TRP 605a and / or the second TRP 605b may count the CSI-RS resources as being used 4 times by the UE 120 (e.g., rather than once).

[0113] The first TRP 605a and / or the second TRP 605b may compare the number of active CSI-RS resources and / or the number of active CSI-RS ports with the determined CSI-RS capability of the UE 120. The first TRP 605a and / or the second TRP 605b may determine the CSI reporting configuration for the UE 120 to perform multi-TRP CSI measurements at least partially based on comparing the number of active CSI-RS resources and / or the number of active CSI-RS ports with the determined CSI-RS capability of the UE 120. For example, the first TRP 605a and / or the second TRP 605b may determine the CSI reporting configuration such that it does not exceed the CSI-RS capability of the UE 120 for multi-TRP CSI measurements (e.g., such that it does not exceed the number of CSI-RS resources supported by the UE 120, the number of CSI-RS ports per resource supported by the UE 120, and / or the total number of CSI-RS ports supported by the UE 120).

[0114] As shown by reference numeral 625, the first TRP 605a and / or the second TRP 605b may send an indication of a CSI report configuration for multi-TRP CSI measurement to the UE 120, where the indication is at least partially based on the CSI-RS capabilities reported by the UE 120 for multi-TRP CSI measurement. As shown by reference numeral 630, the UE 120, the first TRP 605a, and / or the second TRP 605b may perform multi-TRP CSI measurement. For example, the first TRP 605a may send a first CSI-RS to the UE 120 (e.g., using a first CSI-RS resource and / or a first CSI-RS port group). The second TRP 605b may send a second CSI-RS (e.g., using a second CSI-RS resource and / or a second CSI-RS port group). The UE 120 may perform multi-TRP CSI measurement by measuring the first CSI-RS and / or the second CSI-RS. The UE 120 may send a CSI report to the first TRP 605a and / or the second TRP 605b, where the CSI report indicates the multi-TRP CSI measurement (e.g., indicates one or more measurements of the first CSI-RS and / or one or more measurements of the second CSI-RS).

[0115] Accordingly, the network (e.g., the first TRP 605a and / or the second TRP 605b) may be enabled to more accurately determine the capabilities of the UE 120 for multi-TRP CSI measurement. Accordingly, the network may configure the UE 120 without utilizing a CSI-RS report configuration that exceeds the capabilities of the UE 120. This may improve the efficiency associated with multi-TRP CSI measurement, since a CSI report configuration that exceeds the capabilities of the UE 120 may not be configured for the UE 120.

[0116] As described above, Figure 6 is provided as an example. Other examples may be different from the Figure 6 examples described therein.

[0117] Figure 7 is a schematic diagram showing an example process 700, such as may be performed by a user equipment (UE), in accordance with various aspects of the present disclosure. Example process 700 is an example of operations performed by a UE (e.g., UE 120) associated with reporting CSI-RS capabilities for multi-TRP CSI measurement.

[0118] As Figure 7As shown, in some aspects, process 700 may include determining one or more CSI-RS capabilities associated with multi-TRP CSI measurements, each CSI-RS capability indicating at least one of the number of active CSI-RS resources or the number of active CSI-RS ports supported by the UE for multi-TRP CSI measurements (block 710). For example, the UE (e.g., using the CSI-RS capability determination component 908, as Figure 9 shown) may determine one or more CSI-RS capabilities associated with multi-TRP CSI measurements, as described above, each CSI-RS capability indicating at least one of the number of active CSI-RS resources or the number of active CSI-RS ports supported by the UE for multi-TRP CSI measurements.

[0119] As Figure 7 further shown, in some aspects, process 700 may include sending an indication of one or more CSI-RS capabilities associated with multi-TRP CSI measurements (block 720). For example, the UE (e.g., using the Figure 9 transmission component 904 shown) may send an indication of one or more CSI-RS capabilities associated with multi-TRP CSI measurements, as described above.

[0120] Process 700 may include additional aspects, such as any single aspect described below or any combination and / or combination of aspects and / or one or more other processes described elsewhere herein.

[0121] In a first aspect, the multi-TRP CSI measurement includes one or more CSI measurements using at least two CSI port groups associated with different transmission configuration indicator (TCI) states or at least two CSI resources associated with different TCI states, wherein a first CSI port group or a first CSI resource associated with a first TCI state is associated with a transmission from a first TRP, and a second CSI port group or a second CSI resource associated with a second TCI state is associated with a transmission from a second TRP.

[0122] In a second aspect, either alone or in combination with the first aspect, the one or more CSI-RS capabilities associated with the multi-TRP CSI measurement include determining at least one of the following: the number of ports per TRP supported by the UE for multi-TRP CSI measurements, the number of multi-TRP CSI hypotheses supported by the UE for multi-TRP CSI measurements, or the total number of ports supported by the UE for multi-TRP CSI measurements.

[0123] In a third aspect, either alone or in combination with one or more of the first and second aspects, determining the one or more CSI-RS capabilities associated with multi-TRP CSI measurement includes: determining one or more codebook types supported by the UE; and for each of the one or more codebook types, determining one or more CSI-RS capabilities associated with multi-TRP CSI measurement.

[0124] In a fourth aspect, either alone or in combination with one or more of the first to third aspects, determining the number of ports per TRP supported by the UE includes determining at least one of the following: the number of ports per CSI-RS resource supported by the UE for multi-TRP CSI measurement, or the number of ports per CSI-RS port group supported by the UE for multi-TRP CSI measurement.

[0125] In a fifth aspect, either alone or in combination with one or more of the first to fourth aspects, determining the number of multi-TRP CSI hypotheses supported by the UE includes determining at least one of the following: the number of CSI-RS resources supported by the UE for multi-TRP CSI measurement, the number of CSI-RS port group pairs supported by the UE for multi-TRP CSI measurement, or the number of CSI-RS resource pairs supported by the UE for multi-TRP CSI measurement.

[0126] In a sixth aspect, either alone or in combination with one or more of the first to fifth aspects, determining the one or more CSI-RS capabilities associated with multi-TRP CSI measurement includes: determining one or more CSI-RS capabilities per band combination supported by the UE for multi-TRP CSI measurement; and sending the indication of the one or more CSI-RS capabilities includes: sending an indication of the one or more CSI-RS capabilities for multi-TRP CSI measurement for each band combination.

[0127] In a seventh aspect, either alone or in combination with one or more of the first to sixth aspects, determining the one or more CSI-RS capabilities associated with multi-TRP CSI measurement includes: determining one or more CSI-RS capabilities per band combination supported by the UE for multi-TRP CSI measurement; and sending the indication of the one or more CSI-RS capabilities includes: sending an indication of the one or more CSI-RS capabilities for multi-TRP CSI measurement for each band combination.

[0128] In an eighth aspect, alone or in combination with one or more of the first to seventh aspects, determining the one or more CSI-RS capabilities associated with multi-TRP CSI measurement includes: determining one or more sets of concurrent codebooks supported by the UE, where a set of concurrent codebooks included in the one or more sets of concurrent codebooks includes two or more codebooks, and an indication of whether the set of concurrent codebooks is associated with single-TRP communication or multi-TRP communication, where the CSI-RS associated with the two or more codebooks will be counted as active CSI-RS resources and CSI-RS ports simultaneously in a time slot; and for each set of concurrent codebooks included in the one or more sets of concurrent codebooks, determining the one or more CSI-RS capabilities associated with multi-TRP CSI measurement; and sending the indication of the one or more CSI-RS capabilities includes: sending an indication of the one or more sets of concurrent codebooks supported by the UE; and for each set of concurrent codebooks included in the one or more sets of concurrent codebooks, sending an indication of the one or more CSI-RS capabilities.

[0129] In a ninth aspect, alone or in combination with one or more of the first to eighth aspects, determining the one or more CSI-RS capabilities associated with multi-TRP CSI measurement includes: determining a set of codebook pairs associated with multi-TRP communication supported by the UE; and for each codebook pair included in the set of codebook pairs, determining the one or more CSI-RS capabilities associated with multi-TRP CSI measurement.

[0130] In a tenth aspect, alone or in combination with one or more of the first to ninth aspects, process 700 includes: determining a codebook pair, the codebook pair including a first codebook to be used by a first TRP associated with multi-TRP communication and a second codebook to be used by a second TRP associated with the multi-TRP communication.

[0131] In an eleventh aspect, alone or in combination with one or more of the first to tenth aspects, sending the indication of the one or more CSI-RS capabilities associated with multi-TRP CSI measurement includes: sending an indication of the set of codebook pairs supported by the UE; and for each set of codebook pairs supported by the UE, sending the one or more CSI-RS capabilities associated with multi-TRP CSI measurement.

[0132] In a twelfth aspect, either alone or in combination with one or more of the first to eleventh aspects, determining the one or more CSI-RS capabilities associated with multi-TRP CSI measurement includes: determining one or more sets of concurrent codebooks supported by the UE, where a set of concurrent codebooks included in the one or more sets of concurrent codebooks includes two or more codebooks, and an indication of whether the set of concurrent codebooks is associated with single-TRP communication or multi-TRP communication, and the associated CSI-RS of the two or more codebooks will count active CSI-RS resources and CSI-RS ports simultaneously in a time slot, and at least one of the two or more codebooks is a codebook pair; and for each set of concurrent codebooks included in the one or more sets of concurrent codebooks, determining one or more CSI-RS capabilities associated with multi-TRP CSI measurement; and sending an indication of the one or more CSI-RS capabilities includes: sending an indication of the one or more sets of concurrent codebooks supported by the UE; and for each set of concurrent codebooks included in the one or more sets of concurrent codebooks, sending an indication of the one or more CSI-RS capabilities.

[0133] In a thirteenth aspect, either alone or in combination with one or more of the first to twelfth aspects, process 700 includes: receiving a CSI-RS report configuration or request for multi-TRP CSI measurement, the CSI-RS report configuration or request being at least partially based on an indication of the one or more CSI-RS capabilities associated with multi-TRP CSI measurement, the CSI-RS report configuration indicating at least one of the following: one or more CSI-RS resources, one or more CSI-RS ports, or one or more CSI-RS port groups.

[0134] In a fourteenth aspect, either alone or in combination with one or more of the first to thirteenth aspects, process 700 includes: determining CSI-RS resources, and CSI-RS ports for multiple multi-TRP CSI hypotheses; and determining the number of active resources and the number of active ports for the CSI-RS resources and the CSI-RS ports based on the number of multi-TRP CSI hypotheses.

[0135] In a fifteenth aspect, either alone or in combination with one or more of the first to fourteenth aspects, determining the one or more CSI-RS capabilities associated with multi-TRP CSI measurement includes determining at least one of the following: one or more CSI-RS capabilities associated with SDM multi-TRP CSI measurement, where SDM multi-TRP CSI measurement includes: calculating two precoding matrix indicators (PMIs) that assume transmissions associated with the two PMIs for different layers are sent on the same frequency-domain resources and the same time-domain resources; one or more CSI-RS capabilities associated with single-frequency network (SFN) multi-TRP CSI measurement, where SFN multi-TRP CSI measurement includes: calculating two PMIs that assume transmissions associated with the two PMIs for one or more layers are sent on the same frequency-domain resources and the same time-domain resources; one or more CSI-RS capabilities associated with FDM multi-TRP CSI measurement, where FDM multi-TRP CSI measurement includes: calculating two PMIs that assume transmissions associated with the two PMIs for one or more layers are sent on different frequency-domain resources; or one or more CSI-RS capabilities associated with TDM multi-TRP CSI measurement, where TDM multi-TRP CSI measurement includes: calculating two PMIs that assume transmissions associated with the two PMIs for one or more layers are sent on different time-domain resources.

[0136] In a sixteenth aspect, either alone or in combination with one or more of the first to fifteenth aspects, sending the indication of the one or more CSI-RS capabilities associated with multi-TRP CSI measurement includes: sending an indication of at least one of the following: one or more CSI-RS capabilities associated with SDM multi-TRP CSI measurement, one or more CSI-RS capabilities associated with SFN multi-TRP CSI measurement, one or more CSI-RS capabilities associated with FDM multi-TRP CSI measurement, or one or more CSI-RS capabilities associated with TDM multi-TRP CSI measurement.

[0137] In a seventeenth aspect, either alone or in combination with one or more of the first to sixteenth aspects, sending the indication of the one or more CSI-RS capabilities associated with multi-TRP CSI measurement includes: sending an indication of one or more scaling factors associated with the one or more CSI-RS capabilities, where the scaling factor indicates: the number of times a CSI-RS resource or a CSI-RS port is counted towards the number of active CSI-RS resources or active CSI-RS ports when the UE is used for multi-TRP CSI measurement.

[0138] In an eighteenth aspect, alone or in combination with one or more of the first to seventeenth aspects, sending the indication of the one or more CSI-RS capabilities associated with multi-TRP CSI measurement includes: if the CSI-RS resource or CSI-RS port is used for single-TRP CSI measurement and multi-TRP CSI measurement, sending an indication of one or more scaling factors to be applied.

[0139] In a nineteenth aspect, alone or in combination with one or more of the first to eighteenth aspects, sending the indication of the one or more CSI-RS capabilities associated with multi-TRP CSI measurement includes: if the CSI-RS resource or CSI-RS port is used for multi-TRP CSI measurement, sending an indication of one or more scaling factors to be applied.

[0140] In a twentieth aspect, alone or in combination with one or more of the first to nineteenth aspects, determining the one or more CSI-RS capabilities associated with multi-TRP CSI measurement includes: determining one or more scaling factors for at least one of the following: each codebook type supported by the UE, each concurrent codebook set supported by the UE, a subset of codebook types among all codebook types supported by the UE, or a subset of concurrent codebook sets from all concurrent codebook sets supported by the UE, where the number of scaling factors included in the one or more scaling factors is equal to the number of CSI-RS capabilities reported by the UE; determining the order of the one or more scaling factors based at least in part on a one-to-one mapping between each scaling factor included in the set of scaling factors and each CSI-RS capability reported by the UE; and sending the indication of the one or more CSI-RS capabilities associated with multi-TRP CSI measurement includes: sending an indication of at least one of the following: the one or more scaling factors for each codebook supported by the UE, or the one or more scaling factors for each concurrent codebook set supported by the UE.

[0141] In a twenty-first aspect, alone or in combination with one or more of the first to twentieth aspects, sending the indication of the one or more CSI-RS capabilities associated with multi-TRP CSI measurement includes sending an indication of at least one of the following: the one or more scaling factors for each frequency band supported by the UE, or the one or more scaling factors for each frequency band combination supported by the UE.

[0142] Although Figure 7 illustrates example blocks of process 700, in some aspects, process 700 may include Figure 7fewer boxes, different boxes, or boxes in a different arrangement than the boxes shown in [Figure X]. Additionally or alternatively, two or more boxes of process 700 may be performed in parallel.

[0143] Figure 8 is a schematic diagram showing an example process 800, such as performed by a base station, in accordance with various aspects of the present disclosure. Example process 800 is an example of operations performed by a base station (e.g., base station 110 and / or TRP) associated with CSI-RS capability reporting for multi-TRP CSI measurements.

[0144] As Figure 8 shown, in some aspects, process 800 may include receiving, from a UE, an indication of one or more CSI-RS capabilities of the UE associated with multi-TRP CSI measurements, each CSI-RS capability indication of the UE indicating at least one of the number of active CSI-RS resources or the number of active CSI-RS ports supported by the UE for multi-TRP CSI measurements (block 810). For example, a base station (e.g., using a receiving component 1002, as Figure 10 shown) may receive, from a UE, an indication of one or more CSI-RS capabilities of the UE associated with multi-TRP CSI measurements, each CSI-RS capability indication of the UE indicating at least one of the number of active CSI-RS resources or the number of active CSI-RS ports supported by the UE for multi-TRP CSI measurements, as described above.

[0145] As Figure 8 further shown, in some aspects, process 800 may include determining, at least in part based on one or more CSI-RS capabilities of the UE, a CSI reporting configuration or request associated with the UE for multi-TRP CSI measurements (block 820). For example, as described above, a base station (e.g., using a CSI reporting configuration determination component 1008, as Figure 10 shown) may determine, at least in part based on one or more CSI-RS capabilities of the UE, a CSI reporting configuration or request for multi-TRP CSI measurements associated with the UE.

[0146] Process 800 may include additional aspects, such as any single aspect described below or any combination and / or combination of aspects and / or one or more other processes described elsewhere herein.

[0147] In a first aspect, the multi-TRP CSI measurement includes one or more CSI measurements performed by the UE using at least two CSI port groups associated with different transmission configuration indicator (TCI) states or at least two CSI resources associated with different transmission configuration indicator (TCI) states, wherein a first CSI port group or a first CSI resource associated with a first TCI state is associated with transmissions from a first TRP, and a second CSI port group or a second CSI resource associated with a second TCI state is associated with transmissions from a second TRP.

[0148] In a second aspect, either alone or in combination with the first aspect, receiving the indication of the one or more CSI-RS capabilities of the UE associated with the multi-TRP CSI measurement includes receiving an indication of at least one of the following: the number of ports per TRP supported by the UE for multi-TRP CSI measurement, the number of multi-TRP CSI assumptions supported by the UE for multi-TRP CSI measurement, or the total number of ports supported by the UE for multi-TRP CSI measurement.

[0149] In a third aspect, either alone or in combination with one or more of the first and second aspects, receiving the indication of the one or more CSI-RS capabilities of the UE associated with the multi-TRP CSI measurement includes receiving an indication of the one or more codebook types supported by the UE, and for each of the one or more codebook types, the one or more CSI-RS capabilities associated with the multi-TRP CSI measurement.

[0150] In a fourth aspect, either alone or in combination with one or more of the first to third aspects, receiving the indication of the one or more CSI-RS capabilities of the UE associated with the multi-TRP CSI measurement includes receiving an indication of at least one of the following: the number of ports per CSI-RS resource supported by the UE for multi-TRP CSI measurement, or the number of ports per CSI-RS port group supported by the UE for multi-TRP CSI measurement.

[0151] In a fifth aspect, either alone or in combination with one or more of the first to fourth aspects, receiving the indication of the one or more CSI-RS capabilities of the UE associated with multi-TRP CSI measurement includes receiving an indication of at least one of the following: the number of CSI-RS resources supported by the UE for multi-TRP CSI measurement, the number of CSI-RS port group pairs supported by the UE for multi-TRP CSI measurement, or the number of CSI-RS resource pairs supported by the UE for multi-TRP CSI measurement.

[0152] In a sixth aspect, either alone or in combination with one or more of the first to fifth aspects, receiving the indication of the one or more CSI-RS capabilities of the UE associated with multi-TRP CSI measurement includes: receiving an indication of the one or more CSI-RS capabilities of the UE for each frequency band supported by the UE, which is associated with multi-TRP CSI measurement.

[0153] In a seventh aspect, either alone or in combination with one or more of the first to sixth aspects, receiving the indication of the one or more CSI-RS capabilities of the UE associated with multi-TRP CSI measurement includes: receiving an indication of the one or more CSI-RS capabilities of the UE for each frequency band combination supported by the UE, which is associated with multi-TRP CSI measurement.

[0154] In an eighth aspect, either alone or in combination with one or more of the first to seventh aspects, receiving the indication of the one or more CSI-RS capabilities of the UE associated with multi-TRP CSI measurement includes receiving an indication of the following: one or more sets of concurrent codebooks supported by the UE, where a concurrent codebook set included in the one or more sets of concurrent codebooks includes two or more codebooks, and an indication of whether the concurrent codebook set is associated with single-TRP communication or multi-TRP communication; and for each concurrent codebook set included in the one or more sets of concurrent codebooks, the one or more CSI-RS capabilities of the UE associated with multi-TRP CSI measurement.

[0155] In a ninth aspect, alone or in combination with one or more of the first to eighth aspects, receiving the indication of the one or more CSI-RS capabilities of the UE associated with multi-TRP CSI measurement includes receiving an indication of the following: one or more sets of concurrent codebooks supported by the UE, wherein a set of concurrent codebooks included in the one or more sets of concurrent codebooks includes two or more codebooks, and an indication of whether the set of concurrent codebooks is associated with single-TRP communication or multi-TRP communication, wherein the CSI-RS associated with the two or more codebooks will be counted as active CSI-RS resources and CSI-RS ports simultaneously in a time slot, and at least one of the two or more codebooks is a codebook pair; one or more CSI-RS capabilities of the UE associated with multi-TRP CSI measurement, corresponding to each of the one or more sets of concurrent codebooks supported by the UE.

[0156] In a tenth aspect, alone or in combination with one or more of the first to ninth aspects, receiving the indication of the one or more CSI-RS capabilities of the UE associated with multi-TRP CSI measurement includes: receiving an indication of a set of codebook pairs associated with multi-TRP communication supported by the UE, and for each codebook pair included in the set of codebook pairs, receiving an indication of the one or more CSI-RS capabilities of the UE associated with multi-TRP CSI measurement.

[0157] In an eleventh aspect, alone or in combination with one or more of the first to tenth aspects, procedure 800 includes sending to the UE a CSI-RS report configuration for multi-TRP CSI measurement for indicating at least one of the following: one or more CSI-RS resources, one or more CSI-RS ports, or one or more CSI-RS port groups.

[0158] In a twelfth aspect, alone or in combination with one or more of the first to eleventh aspects, determining a CSI report configuration for multi-TRP CSI measurement associated with the UE includes determining the number of CSI-RS resources and the number of CSI-RS ports that the UE uses to perform multi-TRP CSI measurement, comparing the number of CSI-RS resources and the number of CSI-RS ports with the CSI-RS capabilities of the UE associated with multi-TRP CSI measurement, and determining the CSI report configuration for multi-TRP CSI measurement associated with the UE at least partially based on the comparison of the number of CSI-RS resources and the number of CSI-RS ports with the CSI-RS capabilities of the UE associated with multi-TRP CSI measurement.

[0159] In a thirteenth aspect, either alone or in combination with one or more of the first to twelfth aspects, receiving an indication of one or more CSI-RS capabilities of a UE associated with multi-TRP CSI measurement includes receiving an indication of at least one of the following: one or more CSI-RS capabilities of the UE associated with spatial division multiplexing multi-TRP CSI measurement, one or more CSI-RS capabilities associated with single-frequency network multi-TRP CSI measurement, one or more CSI-RS capabilities of the UE associated with frequency division multiplexing multi-TRP CSI measurement, or one or more CSI-RS capabilities of the UE associated with time division multiplexing multi-TRP CSI measurement.

[0160] In a fourteenth aspect, either alone or in combination with one or more of the first to thirteenth aspects, receiving an indication of one or more CSI-RS capabilities of a UE associated with multi-TRP CSI measurement includes: receiving from the UE an indication of one or more scaling factors associated with one or more CSI-RS capabilities of the UE, where the scaling factor indicates the number of CSI-RS resources or CSI-RS ports that will be counted as active CSI-RS resources or active CSI-RS ports when the UE is used for multi-TRP CSI measurement.

[0161] In a fifteenth aspect, either alone or in combination with one or more of the first to fourteenth aspects, receiving an indication of one or more CSI-RS capabilities of a UE associated with multi-TRP CSI measurement includes receiving from the UE an indication of one or more scaling factors to be applied if the CSI-RS resources or CSI-RS ports are used by the UE for multi-TRP CSI measurement.

[0162] In a sixteenth aspect, either alone or in combination with one or more of the first to fifteenth aspects, receiving an indication of one or more CSI-RS capabilities of a UE associated with multi-TRP CSI measurement includes receiving from the UE an indication of one or more scaling factors to be applied if the CSI-RS resources or CSI-RS ports are used by the UE for multi-TRP CSI measurement.

[0163] In a seventeenth aspect, either alone or in combination with one or more of the first to sixteenth aspects, receiving an indication of one or more CSI-RS capabilities of a UE associated with multi-TRP CSI measurement includes receiving from the UE an indication of at least one of the following: one or more scaling factors per codebook supported by the UE, or one or more scaling factors per concurrent codebook set supported by the UE.

[0164] In an eighteenth aspect, alone or in combination with one or more of the first to seventeenth aspects, receiving an indication of one or more CSI-RS capabilities of a UE associated with multi-TRP CSI measurements includes receiving an indication of a scaling factor for each CSI-RS capability of the UE.

[0165] In a nineteenth aspect, alone or in combination with one or more of the first to eighteenth aspects, receiving an indication of one or more CSI-RS capabilities of a UE associated with multi-TRP CSI measurements includes receiving from the UE an indication of at least one of: one or more scaling factors for each frequency band supported by the UE, or one or more scaling factors for each frequency band combination supported by the UE.

[0166] In a twentieth aspect, alone or in combination with one or more of the first to nineteenth aspects, process 800 includes determining the number of active CSI-RS resources or active CSI-RS ports associated with the UE, wherein determining a CSI reporting configuration for multi-TRP CSI measurements associated with the UE is at least partially based on the number of active CSI-RS resources or active CSI-RS ports associated with the UE.

[0167] In a twenty-first aspect, alone or in combination with one or more of the first to twentieth aspects, determining the number of active CSI-RS resources or active CSI-RS ports associated with the UE includes determining the number of multi-TRP CSI measurements performed by the UE using CSI-RS resources, and determining the number of active CSI-RS resources or active CSI-RS ports at least partially based on the number of multi-TRP CSI measurements performed by the UE using CSI-RS resources.

[0168] In a twenty-second aspect, alone or in combination with one or more of the first to twenty-first aspects, determining the number of active CSI-RS resources or active CSI-RS ports associated with the UE includes: determining the number of multi-TRP CSI measurements performed by the UE using CSI-RS resources; applying a scaling factor associated with the single-TRP CSI-RS capability of the UE to the number of multi-TRP CSI measurements performed by the UE using the CSI-RS resources; and determining the number of active CSI-RS resources or active CSI-RS ports at least partially based on applying the scaling factor to the number of multi-TRP CSI measurements performed by the UE using the CSI-RS resources.

[0169] Although Figure 8 illustrates example blocks of process 800, in some aspects, process 800 may include Figure 8The shown boxes are compared to additional boxes, fewer boxes, different boxes, or boxes in a different arrangement. Additionally or alternatively, two or more boxes of process 800 may be executed in parallel.

[0170] Figure 9 is a block diagram of an example apparatus 900 for wireless communication. Apparatus 900 may be a UE, or a UE may include apparatus 900. In some aspects, apparatus 900 includes a receiving component 902 and a transmitting component 904, which may communicate with each other (e.g., via one or more buses and / or one or more other components). As shown, apparatus 900 may use receiving component 902 and transmitting component 904 to communicate with another apparatus 906 (e.g., a UE, a base station, or another wireless communication device). As further shown, apparatus 900 may include one or more of a CSI-RS capability determination component 908 or a multi-TRP CSI measurement component 910, and other examples.

[0171] In some aspects, apparatus 900 may be configured to perform one or more operations described herein in connection with Figure 6 Additionally or alternatively, apparatus 900 may be configured to perform one or more processes described herein, such as Figure 7 process 700, or a combination thereof. In some aspects, Figure 9 the shown apparatus 900 and / or one or more components may include one or more components of the UE described above in connection with Figure 2 Additionally or alternatively, Figure 9 one or more components shown in Figure 2 may be implemented within one or more components described above in connection with

[0172] Figure 2 In some aspects, receiving component 902 may include one or more antennas, demodulators, MIMO detectors, receiving processors, controllers / processors, memories, or combinations thereof of the UE described above in connection with​

[0173] The transmitting component 904 can send communications to the device 906, such as reference signals, control information, data communications, or a combination thereof. In some aspects, one or more other components of the device 906 can generate communications and can provide the generated communications to the transmitting component 904 for transmission to the device 906. In some aspects, the transmitting component 904 can perform signal processing (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, etc.) on the generated communications and can send the processed signals to the device 906. In some aspects, the transmitting component 904 can include one or more antennas, modulators, transmit MIMO processors, transmit processors, controllers / processors, memories, or a combination thereof of the UE described above in conjunction with Figure 2 In some aspects, the transmitting component 904 can be co-located with the receiving component 902 in the transceiver.

[0174] The CSI-RS capability determination component 908 can determine one or more CSI-RS capabilities associated with multi-TRP CSI measurements, each CSI-RS capability indicating at least one of a plurality of active CSI-RS resources or a plurality of active CSI-RS ports supported by the UE for multi-TRP CSI measurements. In some aspects, the CSI-RS capability determination component 908 can include the receiving processor, transmit MIMO processor, transmit processor, controller / processor, memory, or a combination thereof of the UE described above in conjunction with Figure 2 The transmitting component 904 can send an indication of one or more CSI-RS capabilities associated with multi-TRP CSI measurements.

[0175] The CSI-RS capability determination component 908 can determine one or more codebook types supported by the UE. The CSI-RS capability determination component 908 can determine one or more CSI-RS capabilities associated with multi-TRP CSI measurements for each codebook type among the one or more codebook types.

[0176] The CSI-RS capability determination component 908 can determine one or more CSI-RS capabilities per frequency band supported by the UE associated with multi-TRP CSI measurements. The CSI-RS capability determination component 908 can determine one or more CSI-RS capabilities associated with each frequency band combination supported by the UE for multi-TRP CSI measurements.

[0177] The CSI-RS capability determination component 908 may determine one or more sets of concurrent codebooks supported by the UE. The CSI-RS capability determination component 908 may determine, for each set of concurrent codebooks included in the one or more sets of concurrent codebooks, one or more CSI-RS capabilities associated with multi-TRP CSI measurement. The transmitting component 904 may transmit an indication of the one or more sets of concurrent codebooks supported by the UE. The transmitting component 904 may transmit one or more CSI-RS capabilities associated with multi-TRP CSI measurement, where the CSI-RS capabilities correspond to each item in the one or more sets of concurrent codebooks supported by the UE.

[0178] The CSI-RS capability determination component 908 may determine a set of codebook pairs associated with multi-TRP communication supported by the UE. The CSI-RS capability determination component 908 may determine, for each codebook pair included in the set of codebook pairs, one or more CSI-RS capabilities associated with multi-TRP CSI measurement. The CSI-RS capability determination component 908 may determine a codebook pair that includes a first codebook to be used by a first TRP associated with the multi-TRP communication and a second codebook to be used by a second TRP associated with the multi-TRP communication. The transmitting component 904 may transmit an indication of the set of codebook pairs supported by the UE. The transmitting component 904 may transmit one or more CSI-RS capabilities associated with multi-TRP CSI measurement, where the CSI-RS capabilities correspond to each item in the set of codebook pairs supported by the UE.

[0179] The receiving component 902 may receive a CSI-RS report configuration or request for multi-TRP CSI measurement that is at least partially based on an indication of one or more CSI-RS capabilities associated with multi-TRP CSI measurement, where the CSI-RS report configuration indicates at least one of the following: one or more CSI-RS resources, one or more CSI-RS ports, or one or more CSI-RS port groups. The multi-TRP CSI measurement component 910 may perform one or more multi-TRP CSI measurements using the CSI-RS resources and CSI-RS ports. In some aspects, the multi-TRP CSI measurement component 910 may include one or more antennas, demodulators, MIMO detectors, receive processors, modulators, transmit MIMO processors, transmit processors, controller / processors, memories, or combinations thereof of the UE described above in conjunction with Figure 2 one or more antennas, demodulators, MIMO detectors, receive processors, modulators, transmit MIMO processors, transmit processors, controller / processors, memories, or combinations thereof of the UE described above in conjunction with

[0180] The transmitting component 904 may transmit an indication of one or more scaling factors associated with CSI-RS capabilities. If the CSI-RS resource or CSI-RS port is used for single-TRP CSI measurement and multi-TRP CSI measurement, the transmitting component 904 may transmit an indication of one or more scaling factors to be applied. The transmitting component 904 may transmit an indication of one or more scaling factors that will be reapplied if the CSI-RS resource or CSI-RS port is used for multi-TRP CSI measurement. The transmitting component 904 may transmit an indication of at least one of the following: one or more scaling factors for each codebook supported by the UE 120, or one or more scaling factors for each set of concurrent codebooks supported by the UE 120. The transmitting component 904 may transmit an indication of one or more scaling factors for each CSI-RS capability associated with the UE 120. The transmitting component 904 may transmit an indication of at least one of the following: one or more scaling factors for each frequency band supported by the UE 120, or one or more scaling factors for each combination of frequency bands supported by the UE 120.

[0181] Figure 9 The number and arrangement of the illustrated components are provided as an example. In fact, there may be additional components, fewer components, different components, or components arranged differently from those Figure 9 illustrated. Additionally, Figure 9 two or more of the illustrated components may be implemented within a single component, or Figure 9 a single illustrated component may be implemented as multiple distributed components. Additionally or alternatively, Figure 9 a collection of the illustrated (one or more) components may perform one or more functions described as being performed by Figure 9 another collection of illustrated components.

[0182] Figure 10 is a block diagram of an example apparatus 1000 for wireless communication. The apparatus 1000 may be a base station (or TRP), or a base station (or TRP) may include the apparatus 1000. In some aspects, the apparatus 1000 includes a receiving component 1002 and a transmitting component 1004, which may communicate with each other (e.g., via one or more buses and / or one or more other components). As shown, the apparatus 1000 may use the receiving component 1002 and the transmitting component 1004 to communicate with another apparatus 1006 (e.g., a UE, a base station, or another wireless communication device). As further shown, the apparatus 1000 may include a CSI report configuration determination component 1008 and other examples.

[0183] In some aspects, the apparatus 1000 may be configured to perform herein in connection with Figure 6One or more of the described operations. Additionally or alternatively, apparatus 1000 may be configured to perform one or more of the processes described herein, such as Figure 8 process 800 or combinations thereof. In some aspects, Figure 10 apparatus 1000 and / or one or more components shown in Figure 2 may include one or more components of the base station described above in connection with Figure 10 One or more components shown in Figure 2 may be implemented within one or more of the components described above in connection with

[0184] Receiving component 1002 may receive communications from apparatus 1006, such as reference signals, control information, data communications, or combinations thereof. Receiving component 1002 may provide the received communications to one or more other components of apparatus 1000. In some aspects, receiving component 1002 may perform signal processing (such as filtering, amplifying, demodulating, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalizing, interference cancellation, or decoding, etc.) on the received communications, and may provide the processed signals to one or more other components of apparatus 1006. In some aspects, receiving component 1002 may include one or more antennas, demodulators, MIMO detectors, receiving processors, controller / processors, memories, or combinations thereof of the base station described above in connection with Figure 2 described.

[0185] Transmitting component 1004 may transmit communications to apparatus 1006, such as reference signals, control information, data communications, or combinations thereof. In some aspects, one or more other components of apparatus 1006 may generate the communications, and may provide the generated communications to transmitting component 1004 for transmission to apparatus 1006. In some aspects, transmitting component 1004 may perform signal processing (such as filtering, amplifying, modulating, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, etc.) on the generated communications, and may transmit the processed signals to apparatus 1006. In some aspects, transmitting component 1004 may include one or more antennas, modulators, transmit MIMO processors, transmit processors, controller / processors, memories, or combinations thereof of the base station described above in connection with Figure 2 described. In some aspects, transmitting component 1004 may be co-located with receiving component 1002 in a transceiver.

[0186] The receiving component 1002 may receive an indication of one or more CSI-RS capabilities of the UE associated with multi-TRP CSI measurements from the UE. Each CSI-RS capability of the UE indicates at least one of the number of active CSI-RS resources or the number of active CSI-RS ports supported for multi-TRP CSI measurements. The CSI report configuration determination component 1008 may determine CSI report settings or requests for multi-TRP CSI measurements associated with the UE at least in part based on one or more CSI-RS capabilities of the UE. In some aspects, the CSI report configuration determination component 1008 may include the receiving processor, transmit MIMO processor, transmit processor, controller / processor, memory, or a combination thereof of the base station described above in connection with Figure 2 The receiving processor, transmit MIMO processor, transmit processor, controller / processor, memory, or a combination thereof of the base station described.

[0187] The receiving component 1002 may receive an indication of one or more CSI-RS capabilities of each frequency band supported by the UE associated with multi-TRP CSI measurements. The receiving component 1002 may receive an indication of one or more CSI-RS capabilities of each frequency band combination supported by the UE associated with multi-TRP CSI measurements.

[0188] The transmitting component 1004 may send a CSI-RS report configuration or a request for multi-TRP CSI measurements indicating at least one of: one or more CSI-RS resources, one or more CSI-RS ports, or one or more CSI-RS port groups.

[0189] The CSI report configuration determination component 1008 may determine the number of CSI-RS resources and the number of CSI-RS ports for the UE to perform multi-TRP CSI measurements. The CSI report configuration determination component 1008 may compare the number of CSI-RS resources and the number of CSI-RS ports with the CSI-RS capabilities of the UE associated with multi-TRP CSI measurements. The CSI report configuration determination component 1008 may determine the CSI report configuration for multi-TRP CSI measurements associated with the UE at least in part based on comparing the number of CSI-RS resources and the number of CSI-RS ports with the CSI-RS capabilities of the UE associated with multi-TRP CSI measurements.

[0190] The receiving component 1002 may receive an indication from the UE of one or more scaling factors associated with the UE's CSI-RS capabilities. The receiving component 1002 may receive an indication from the UE of one or more scaling factors that will be applied if the CSI-RS resource or CSI-RS port is used by the UE for single-TRP CSI measurements and multi-TRP CSI measurements. The receiving component 1002 may receive an indication from the UE of one or more scaling factors that will be applied if the CSI-RS resource or CSI-RS port is used by the UE for multi-TRP CSI measurements.

[0191] The receiving component 1002 may receive an indication from the UE of at least one of the following: one or more scaling factors for each codebook supported by the UE, or one or more scaling factors for each concurrent codebook set supported by the UE. The receiving component 1002 may receive an indication of one or more scaling factors for each CSI-RS capability of the UE. The receiving component 1002 may receive an indication from the UE of at least one of the following: one or more scaling factors for each frequency band supported by the UE, or one or more scaling factors for each frequency band combination supported by the UE.

[0192] The CSI report configuration determination component 1008 may determine the number of active CSI-RS resources or active CSI-RS ports associated with the UE, wherein determining the CSI report settings for multi-TRP CSI measurements associated with the UE is at least partially based on the number of active CSI-RS resources or active CSI-RS ports associated with the UE.

[0193] The CSI report configuration determination component 1008 may determine the number of multi-TRP CSI measurements performed by the UE using the CSI-RS resources. The CSI report configuration determination component 1008 may determine the number of active CSI-RS resources or active CSI-RS ports at least partially based on the number of multi-TRP CSI measurements performed by the UE using the CSI-RS resources.

[0194] The CSI report configuration determination component 1008 may determine the number of multi-TRP CSI measurements performed by the UE using the CSI-RS resources. The CSI report configuration determination component 1008 may apply a scaling factor associated with the UE's CSI-RS capabilities to the number of multi-TRP CSI measurements performed by the UE using the CSI-RS resources. The CSI report configuration determination component 1008 may determine the number of active CSI-RS resources or active CSI-RS ports at least partially based on applying the scaling factor to the number of multi-TRP CSI measurements performed by the UE using the CSI-RS resources.

[0195] Figure 10The number and arrangement of the components shown are provided as an example. In fact, there may be additional components, fewer components, different components, or components arranged differently from those Figure 10 shown. In addition, Figure 10 two or more of the components shown may be implemented within a single component, or Figure 10 a single component shown may be implemented as multiple distributed components. Additionally or alternatively, Figure 10 a collection of the (one or more) components shown may perform one or more functions described as being performed by Figure 10 another collection of components shown.

[0196] The foregoing disclosure provides illustration and description, and is not intended to be exhaustive nor to limit these aspects to the precise forms disclosed. Modifications and variations may be made in light of the above disclosure, or may be obtained from practice of these aspects.

[0197] As used herein, the term "component" is intended to be broadly interpreted as hardware, firmware, and / or a combination of hardware and software. As used herein, a processor is implemented in hardware, firmware, and / or a combination of hardware and software. It will be apparent that the systems and / or methods described herein may be implemented in different forms of hardware, firmware, and / or a combination of hardware and software. The actual specific control hardware or software code used to implement these systems and / or methods does not limit these aspects. Accordingly, the operation and behavior of the systems and / or methods are described herein without reference to specific software code - it being understood that software and hardware may be designed to implement the systems and / or methods at least in part based on the description herein.

[0198] As used herein, depending on the context, meeting a threshold may refer to a value greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, and so on.

[0199] Although combinations of features are set forth in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of each aspect. In fact, many of these features may be combined in ways not specifically recited in the claims and / or not disclosed in the specification. While each dependent claim listed below may directly depend on only one claim, the disclosure of each aspect includes each dependent claim in combination with every other claim in the claim set. A phrase referring to "at least one" of a list of items refers to any combination of those items (including a single member). For example, "at least one of a, b, or c" is intended to cover a, b, c, a-b, a-c, b-c, and a-b-c, as well as any combination having multiple of the same element (e.g., a-a, a-a-a, a-a-b, a-a-c, a-b-b, a-c-c, b-b, b-b-b, b-b-c, c-c, and c-c-c, or any other ordering of a, b, and c).

[0200] Any element, act, or instruction used herein should not be construed as critical or essential unless so expressly described. Further, as used herein, the articles "a" and "an" are intended to include one or more and may be used interchangeably with "one or more." Further, as used herein, the article "the" is intended to include one or more of the items recited in conjunction with the article "the" and may be used interchangeably with "one or more." Further, as used herein, the terms "set" and "group" are intended to include one or more (e.g., related items, unrelated items, combinations of related and unrelated items, etc.) and may be used interchangeably with "one or more." If only intending to refer to a single item, the phrase "only one" or similar language will be used. Further, as used herein, the terms "has," "have," "having," etc. are intended to be open-ended terms. Further, the phrase "based on" is intended to mean "at least partially based on" unless otherwise expressly stated. Further, as used herein, the term "and / or" when used in a series is intended to be inclusive and may be used interchangeably with "and / or" unless otherwise expressly stated (e.g., if used in conjunction with "either" or "only one of").

Claims

1. A method of wireless communication performed by a user equipment (UE), comprising: Send an indication of one or more CSI-Reference Signal (CSI-RS) capabilities associated with multi-Transmission and Reception Point (multi-TRP) Channel State Information (CSI) measurements, each CSI-RS capability indicating at least one of the number of active CSI-RS resources or the number of active CSI-RS ports supported by the UE for multi-TRP CSI measurements, wherein the one or more CSI-RS capabilities associated with the multi-TRP CSI measurements are associated with the following triple: (a) the maximum number of ports per CSI-RS resource of a frequency band combination, (b) the maximum number of CSI-RS resources supported by the UE in the frequency band combination for multi-TRP CSI measurements, and (c) the total number of ports supported by the UE in the frequency band combination for multi-TRP CSI measurements; and Receive a CSI reporting configuration or request for multi-TRP CSI measurements, the CSI reporting configuration or request being at least partially based on the indication of the one or more CSI-RS capabilities associated with the multi-TRP CSI measurements.

2. The method according to claim 1, wherein, The multi-TRP CSI measurements include one or more CSI measurements using at least two CSI port groups associated with different Transmission Configuration Indicator (TCI) states or at least two CSI resources associated with different TCI states, wherein a first CSI port group or a first CSI resource associated with a first TCI state is associated with a transmission from a first TRP, and a second CSI port group or a second CSI resource associated with a second TCI state is associated with a transmission from a second TRP.

3. The method according to claim 1, wherein, The one or more CSI-RS capabilities associated with the multi-TRP CSI measurements are related to one or more sets of concurrent codebooks supported by the UE in a time slot, and wherein a set of concurrent codebooks included in the one or more sets of concurrent codebooks indicates whether the set of concurrent codebooks is associated with both single-TRP communication and multi-TRP communication.

4. The method according to claim 1, wherein, The one or more CSI-RS capabilities associated with the multi-TRP CSI measurements are associated with one or more codebook combinations supported by the UE; And wherein sending the indication of the one or more CSI-RS capabilities includes: Sending one or more CSI-RS capabilities for each codebook combination.

5. The method according to claim 1, wherein, Sending the indication of the one or more CSI-RS capabilities includes: Sending an indication of the one or more CSI-RS capabilities for multi-TRP CSI measurements for each frequency band combination.

6. The method according to claim 1, wherein, The one or more CSI-RS capabilities associated with the multi-TRP CSI measurements are associated with one or more sets of concurrent codebooks supported by the UE, wherein a set of concurrent codebooks included in the one or more sets of concurrent codebooks includes two or more codebooks and an indication of whether the set of concurrent codebooks is associated with single-TRP communication or multi-TRP communication, and the associated CSI-RS of the two or more codebooks will be counted as active CSI-RS resources and CSI-RS ports simultaneously in a time slot; and Among them, sending the indication of the one or more CSI-RS capabilities includes: For each set of concurrent codebooks included in the one or more sets of concurrent codebooks, sending an indication of the one or more CSI-RS capabilities.

7. The method according to claim 1, wherein, The one or more CSI-RS capabilities are associated with the following: A set of codebook pairs associated with multi-TRP communication supported by the UE; and For each codebook pair included in the set of codebook pairs, one or more CSI-RS capabilities associated with multi-TRP CSI measurement.

8. The method according to claim 7, wherein the one or more CSI-RS capabilities are associated with a codebook pair including a first codebook to be used by a first TRP associated with multi-TRP communication and a second codebook to be used by a second TRP associated with the multi-TRP communication.

9. The method according to any one of claims 7-8, wherein, Sending the indication of the one or more CSI-RS capabilities associated with multi-TRP CSI measurement includes: Sending an indication of the set of codebook pairs supported by the UE; and For each set of codebook pairs supported by the UE, sending one or more CSI-RS capabilities associated with multi-TRP CSI measurement.

10. The method according to claim 1, wherein, The one or more CSI-RS capabilities associated with multi-TRP CSI measurement are associated with one or more sets of concurrent codebooks supported by the UE, where a set of concurrent codebooks included in the one or more sets of concurrent codebooks includes two or more codebooks and an indication of whether the set of concurrent codebooks is associated with single-TRP communication or multi-TRP communication, and the associated CSI-RS of the two or more codebooks will be counted as active CSI-RS resources and CSI-RS ports simultaneously in a time slot, and at least one of the two or more codebooks is a codebook pair; and Among them, sending the indication of the one or more CSI-RS capabilities includes: For each set of concurrent codebooks included in the one or more sets of concurrent codebooks, sending an indication of the one or more CSI-RS capabilities.

11. The method according to claim 1, wherein the CSI report configuration or the request indicates at least one of the following: One or more CSI-RS resources, one or more CSI-RS ports, or one or more CSI-RS port groups.

12. The method according to claim 1, wherein,The one or more CSI-RS capabilities associated with multi-TRP CSI measurement are associated with at least one of the following: One or more CSI-RS capabilities associated with spatial division multiplexing (SDM) multi-TRP CSI measurement, wherein the SDM multi-TRP CSI measurement includes: calculating two precoding matrix indicators (PMIs) that assume transmissions associated with the two PMIs on different layers are sent on the same frequency domain resources and the same time domain resources, one or more CSI-RS capabilities associated with single frequency network (SFN) multi-TRP CSI measurement, wherein the SFN multi-TRP CSI measurement includes: calculating two PMIs that assume one or more layers of transmissions associated with the two PMIs are sent on the same frequency domain resources and the same time domain resources, one or more CSI-RS capabilities associated with frequency division multiplexing (FDM) multi-TRP CSI measurement, wherein the FDM multi-TRP CSI measurement includes: calculating two PMIs that assume one or more layers of transmissions associated with the two PMIs are sent on different frequency domain resources, or one or more CSI-RS capabilities associated with time division multiplexing (TDM) multi-TRP CSI measurement, wherein the TDM multi-TRP CSI measurement includes: calculating two PMIs that assume one or more layers of transmissions associated with the two PMIs are sent on different time domain resources.

13. The method according to claim 1, wherein, Sending the indication of the one or more CSI-RS capabilities associated with the multi-TRP CSI measurement includes: sending an indication of at least one of the following: One or more CSI-RS capabilities associated with SDM multi-TRP CSI measurement, One or more CSI-RS capabilities associated with SFN multi-TRP CSI measurement, One or more CSI-RS capabilities associated with FDM multi-TRP CSI measurement, or One or more CSI-RS capabilities associated with TDM multi-TRP CSI measurement.

14. The method according to claim 1, wherein, Sending the indication of the one or more CSI-RS capabilities associated with the multi-TRP CSI measurement includes: Sending an indication of one or more scaling factors associated with the one or more CSI-RS capabilities, wherein the scaling factor indicates: the number of times of counting CSI-RS resources or CSI-RS ports into the number of active CSI-RS resources or active CSI-RS ports when used by the UE for multi-TRP CSI measurement.

15. The method according to claim 1, wherein, Sending the indication of the one or more CSI-RS capabilities associated with the multi-TRP CSI measurement includes: If the CSI-RS resources or CSI-RS ports are used for single-TRP CSI measurement and multi-TRP CSI measurement, sending an indication of one or more scaling factors to be applied.

16. The method according to claim 1, wherein, Sending the indication of the one or more CSI-RS capabilities associated with the multi-TRP CSI measurement includes: If the CSI-RS resources or CSI-RS ports are used for multi-TRP CSI measurement, sending an indication of one or more scaling factors to be applied.

17. The method according to claim 1, wherein, The one or more CSI-RS capabilities associated with multi-TRP CSI measurement are associated with one or more scaling factors for at least one of the following: each codebook type supported by the UE, each concurrent codebook set supported by the UE, a subset of codebook types from all codebook types supported by the UE, or a subset of concurrent codebook sets from all concurrent codebook sets supported by the UE, wherein the number of scaling factors included in the one or more scaling factors is equal to the number of CSI-RS capabilities reported by the UE; the order of the one or more scaling factors is determined at least in part based on a one-to-one mapping between each scaling factor included in the one or more scaling factors and each CSI-RS capability reported by the UE; and wherein, sending the indication of the one or more CSI-RS capabilities associated with multi-TRP CSI measurement includes: sending an indication of at least one of the following: the one or more scaling factors for each codebook supported by the UE, or the one or more scaling factors for each concurrent codebook set supported by the UE.

18. The method according to claim 1, wherein, Sending the indication of the one or more CSI-RS capabilities associated with multi-TRP CSI measurement includes sending an indication of at least one of the following: the one or more scaling factors for each frequency band supported by the UE, or the one or more scaling factors for each frequency band combination supported by the UE.

19. The method according to claim 1, wherein, The one or more CSI-RS capabilities associated with the multi-TRP CSI measurement further include, for each frequency band, one or more CSI-RS capabilities associated with the following triple: (a) the maximum number of ports per CSI-RS resource in a frequency band, (b) the maximum number of CSI-RS resources supported by the UE in the frequency band for multi-TRP CSI measurement, and (c) the total number of ports supported by the UE in the frequency band for multi-TRP CSI measurement.

20. A method for wireless communication performed by a network entity, comprising: Receiving an indication of one or more CSI reference signal (CSI-RS) capabilities of a user equipment (UE) associated with multi-transmit receive point (multi-TRP) channel state information (CSI) measurement, each CSI-RS capability of the UE indicating at least one of the number of active CSI-RS resources or the number of active CSI-RS ports supported by the UE for multi-TRP CSI measurement, wherein the one or more CSI-RS capabilities associated with the multi-TRP CSI measurement are associated with the following triple: (a) the maximum number of ports per CSI-RS resource in a frequency band combination, (b) the maximum number of CSI-RS resources supported by the UE in the frequency band combination for multi-TRP CSI measurement, and (c) the total number of ports supported by the UE in the frequency band combination for multi-TRP CSI measurement; and sending, at least in part based on the one or more CSI-RS capabilities of the UE, a CSI reporting configuration or request for multi-TRP CSI measurement associated with the UE.

21. The method according to claim 20, wherein, The multi-TRP CSI measurement includes one or more CSI measurements performed by the UE using at least two CSI port groups associated with different transmission configuration indicator (TCI) states or at least two CSI resources associated with different TCI states, wherein a first CSI port group or a first CSI resource associated with a first TCI state is associated with transmissions from a first TRP, and a second CSI port group or a second CSI resource associated with a second TCI state is associated with transmissions from a second TRP.

22. The method according to claim 20, wherein, One or more CSI-RS capabilities related to the multi-TRP CSI measurement are related to one or more sets of concurrent codebooks supported by the UE in a time slot, and wherein an indication of whether a set of concurrent codebooks included in the one or more sets of concurrent codebooks is associated with single-TRP communication or multi-TRP communication is indicated in the set of concurrent codebooks.

23. The method according to claim 20, wherein, Receiving the indication of the one or more CSI-RS capabilities of the UE related to the multi-TRP CSI measurement includes receiving an indication of: One or more codebook combinations supported by the UE, and For each codebook combination among the one or more codebook combinations, one or more CSI-RS capabilities associated with the multi-TRP CSI measurement.

24. The method according to claim 20, wherein, Receiving the indication of the one or more CSI-RS capabilities of the UE related to the multi-TRP CSI measurement includes receiving an indication of: One or more sets of concurrent codebooks supported by the UE, wherein a set of concurrent codebooks included in the one or more sets of concurrent codebooks includes two or more codebooks and an indication of whether the set of concurrent codebooks is associated with single-TRP communication or multi-TRP communication, and wherein the one or more CSI-RS capabilities of the UE are for each set of concurrent codebooks included in the one or more sets of concurrent codebooks.

25. The method according to claim 20, wherein, Receiving the indication of the one or more CSI-RS capabilities of the UE related to the multi-TRP CSI measurement includes receiving an indication of: One or more sets of concurrent codebooks supported by the UE, wherein a set of concurrent codebooks included in the one or more sets of concurrent codebooks includes two or more codebooks and an indication of whether the set of concurrent codebooks is associated with single-TRP communication or multi-TRP communication, the associated CSI-RS of the two or more codebooks will be counted as active CSI-RS resources and CSI-RS ports simultaneously in a time slot, at least one of the two or more codebooks is a codebook pair, and wherein the one or more CSI-RS capabilities of the UE correspond to each item in the one or more sets of concurrent codebooks supported by the UE.

26. The method according to claim 20, wherein, Receiving the indication of the one or more CSI-RS capabilities of the UE related to the multi-TRP CSI measurement includes receiving an indication of: A set of codebook pairs associated with multi-TRP communication supported by the UE, wherein the one or more CSI-RS capabilities of the UE are for each codebook pair included in the set of codebook pairs.

27. The method according to claim 20, further comprising: Transmit the CSI report configuration for multi-TRP CSI measurement, the CSI report configuration indicating at least one of the following: one or more CSI-RS resources, one or more CSI-RS ports, or one or more CSI-RS port groups.

28. The method according to claim 20, wherein, The CSI report configuration for multi-TRP CSI measurement associated with the UE is determined at least in part by comparing the number of CSI-RS resources and the number of CSI-RS ports used by the UE to perform multi-TRP CSI measurement with the CSI-RS capabilities of the UE associated with multi-TRP CSI measurement.

29. The method according to claim 20, wherein, Receiving the indication of the one or more CSI-RS capabilities of the UE associated with multi-TRP CSI measurement includes receiving an indication of at least one of the following: One or more CSI-RS capabilities of the UE associated with spatial division multiplexing multi-TRP CSI measurement, One or more CSI-RS capabilities associated with single-frequency network multi-TRP CSI measurement, One or more CSI-RS capabilities of the UE associated with frequency division multiplexing multi-TRP CSI measurement, or One or more CSI-RS capabilities of the UE associated with time division multiplexing multi-TRP CSI measurement.

30. The method according to claim 20, wherein, Receiving the indication of the one or more CSI-RS capabilities of the UE associated with multi-TRP CSI measurement includes: Receiving an indication of one or more scaling factors associated with the one or more CSI-RS capabilities of the UE, wherein the scaling factor indicates the number of times a CSI-RS resource or a CSI-RS port is counted as the number of active CSI-RS resources or active CSI-RS ports when used by the UE for multi-TRP CSI measurement.

31. The method according to claim 20, wherein, Receiving the indication of the one or more CSI-RS capabilities of the UE associated with multi-TRP CSI measurement includes: Receiving an indication of one or more scaling factors, which will be applied if the UE uses the CSI-RS resource or the CSI-RS port for single-TRP CSI measurement and multi-TRP CSI measurement.

32. The method according to claim 20, wherein, Receiving the indication of the one or more CSI-RS capabilities of the UE associated with multi-TRP CSI measurement includes: Receiving an indication of one or more scaling factors, which will be applied if the UE uses the CSI-RS resource or the CSI-RS port for multi-TRP CSI measurement.

33. The method according to claim 20, wherein, Receiving the indication of the one or more CSI-RS capabilities of the UE associated with multi-TRP CSI measurement includes receiving from the UE an indication of at least one of the following: One or more scaling factors for each codebook supported by the UE, or One or more scaling factors for each concurrent codebook set supported by the UE.

34. The method according to claim 20, wherein, Receiving the indication of the one or more CSI-RS capabilities associated with multi-TRP CSI measurements for the UE includes: Receiving an indication of one or more scaling factors for each CSI-RS capability of the UE.

35. The method according to claim 20, wherein, Receiving the indication of the one or more CSI-RS capabilities associated with multi-TRP CSI measurements for the UE includes receiving from the UE an indication of at least one of: One or more scaling factors for each frequency band supported by the UE, or One or more scaling factors for each frequency band combination supported by the UE.

36. The method according to claim 20, wherein, The CSI reporting configuration for multi-TRP CSI measurements associated with the UE is determined at least in part based on the number of active CSI-RS resources or active CSI-RS ports associated with the UE.

37. The method according to claim 36, wherein, The number of active CSI-RS resources or active CSI-RS ports associated with the UE is determined at least in part based on the number of multi-TRP CSI measurements performed by the UE using CSI-RS resources.

38. The method according to any one of claims 36 - 37, wherein, The number of active CSI-RS resources or active CSI-RS ports associated with the UE is determined at least in part based on applying a scaling factor to the number of multi-TRP CSI measurements performed by the UE using CSI-RS resources.

39. The method according to claim 20, wherein, The one or more CSI-RS capabilities associated with the multi-TRP CSI measurements also include one or more CSI-RS capabilities supported by the UE for each frequency band associated with the following triple: (a) the maximum number of ports per CSI-RS resource in a frequency band, (b) the maximum number of CSI-RS resources supported by the UE for multi-TRP CSI measurements in the frequency band, and (c) the total number of ports supported by the UE for multi-TRP CSI measurements in the frequency band.

40. A user equipment (UE) for wireless communication, comprising: A memory; And One or more processors coupled to the memory, the one or more processors being configured to cause the UE to: Transmit an indication of one or more CSI-reference signal (CSI-RS) capabilities associated with multi-transmit receive point (multi-TRP) channel state information (CSI) measurements, each CSI-RS capability indicating at least one of the number of active CSI-RS resources or the number of active CSI-RS ports supported by the UE for multi-TRP CSI measurements, wherein the one or more CSI-RS capabilities associated with the multi-TRP CSI measurements are associated with the following triple: (a) the maximum number of ports per CSI-RS resource in a frequency band combination, (b) the maximum number of CSI-RS resources supported by the UE for multi-TRP CSI measurements in the frequency band combination, and (c) the total number of ports supported by the UE for multi-TRP CSI measurements in the frequency band combination; And Receive a CSI report configuration or request for multi-TRP CSI measurement, where the CSI report configuration or request is at least partially based on an indication of one or more CSI-RS capabilities associated with the multi-TRP CSI measurement.

41. The UE according to claim 40, wherein, One or more CSI-RS capabilities related to the multi-TRP CSI measurement are related to one or more sets of concurrent codebooks supported by the UE in a time slot, and wherein a concurrent codebook set included in the one or more sets of concurrent codebooks indicates whether the concurrent codebook set is associated with both single-TRP communication and multi-TRP communication.

42. The UE according to claim 40, wherein, The one or more CSI-RS capabilities associated with the multi-TRP CSI measurement are associated with one or more codebook combinations supported by the UE; and wherein the one or more processors are configured to cause the UE to perform the following to send the indication of the one or more CSI-RS capabilities: Send one or more CSI-RS capabilities for each codebook combination.

43. The UE according to claim 40, wherein, The one or more processors are configured to cause the UE to perform the following to send the indication of the one or more CSI-RS capabilities: Send an indication of the one or more CSI-RS capabilities for the multi-TRP CSI measurement for each frequency band combination.

44. The UE according to claim 40, wherein, The one or more CSI-RS capabilities associated with the multi-TRP CSI measurement are associated with one or more sets of concurrent codebooks supported by the UE, wherein a concurrent codebook set included in the one or more sets of concurrent codebooks includes two or more codebooks and an indication of whether the concurrent codebook set is associated with single-TRP communication or multi-TRP communication, and the associated CSI-RS of the two or more codebooks will be counted as active CSI-RS resources and CSI-RS ports simultaneously in a time slot; and wherein the one or more processors are configured to cause the UE to perform the following to send the indication of the one or more CSI-RS capabilities: For each concurrent codebook set included in the one or more sets of concurrent codebooks, send an indication of the one or more CSI-RS capabilities.

45. The UE according to claim 40, wherein, The one or more CSI-RS capabilities are associated with the following: A set of codebook pairs associated with the multi-TRP communication supported by the UE; and For each codebook pair included in the set of codebook pairs, one or more CSI-RS capabilities associated with the multi-TRP CSI measurement.

46. The UE according to claim 45, wherein the one or more CSI - RS capabilities are associated with a codebook pair including a first codebook to be used by a first TRP associated with multi - TRP communication and a second codebook to be used by a second TRP associated with the multi - TRP communication.

47. The UE according to any one of claims 45 - 46, wherein, The one or more processors are configured to cause the UE to perform the following to send the indication of the one or more CSI-RS capabilities associated with the multi-TRP CSI measurement: Send an indication of the set of codebook pairs supported by the UE; and For each set of codebook pairs supported by the UE, send one or more CSI-RS capabilities associated with the multi-TRP CSI measurement.

48. The UE according to claim 40, wherein, The one or more CSI-RS capabilities associated with multi-TRP CSI measurement are associated with one or more sets of concurrent codebooks supported by the UE, where a concurrent codebook set included in the one or more sets of concurrent codebooks includes two or more codebooks, and an indication as to whether the concurrent codebook set is associated with single-TRP communication or multi-TRP communication, and the associated CSI-RS of the two or more codebooks will be counted as active CSI-RS resources and CSI-RS ports simultaneously in a time slot; and wherein the one or more processors for sending the indication of the one or more CSI-RS capabilities are configured to cause the UE to: For each concurrent codebook set included in the one or more sets of concurrent codebooks, send an indication of the one or more CSI-RS capabilities.

49. The UE according to claim 40, wherein, The CSI report configuration or the request indicates at least one of the following: one or more CSI-RS resources, one or more CSI-RS ports, or one or more CSI-RS port groups.

50. The UE according to claim 40, wherein, The one or more CSI-RS capabilities are associated with at least one of the following: One or more CSI-RS capabilities associated with spatial division multiplexing (SDM) multi-TRP CSI measurement, where SDM multi-TRP CSI measurement includes: calculating two precoding matrix indicators (PMIs), which assume that different layers of the transmissions associated with the two PMIs are transmitted on the same frequency domain resource and the same time domain resource, One or more CSI-RS capabilities associated with single-frequency network (SFN) multi-TRP CSI measurement, where SFN multi-TRP CSI measurement includes: calculating two PMIs, which assume that one or more layers of the transmissions associated with the two PMIs are transmitted on the same frequency domain resource and the same time domain resource, One or more CSI-RS capabilities associated with frequency division multiplexing (FDM) multi-TRP CSI measurement, where FDM multi-TRP CSI measurement includes: calculating two PMIs, which assume that one or more layers of the transmissions associated with the two PMIs are transmitted on different frequency domain resources, or One or more CSI-RS capabilities associated with time division multiplexing (TDM) multi-TRP CSI measurement, where TDM multi-TRP CSI measurement includes: calculating two PMIs, which assume that one or more layers of the transmissions associated with the two PMIs are transmitted on different time domain resources.

51. The UE according to claim 40, wherein, The one or more processors for sending the indication of the one or more CSI-RS capabilities associated with multi-TRP CSI measurement are configured to cause the UE to send an indication of at least one of the following: One or more CSI-RS capabilities associated with spatial division multiplexing (SDM) multi-TRP CSI measurement, One or more CSI-RS capabilities associated with single-frequency network (SFN) multi-TRP CSI measurement, One or more CSI-RS capabilities associated with frequency-division multiplexing (FDM) multi-TRP CSI measurements, or One or more CSI-RS capabilities associated with time-division multiplexing (TDM) multi-TRP CSI measurements.

52. The UE according to claim 40, wherein, The one or more processors for sending the indication of the one or more CSI-RS capabilities associated with multi-TRP CSI measurements are configured to cause the UE to: Send an indication of one or more scaling factors associated with the one or more CSI-RS capabilities, where the scaling factor indicates the number of times a CSI-RS resource or CSI-RS port is counted towards the number of active CSI-RS resources or active CSI-RS ports when used by the UE for multi-TRP CSI measurements.

53. The UE according to claim 40, wherein, The one or more processors for sending the indication of the one or more CSI-RS capabilities associated with multi-TRP CSI measurements are configured to cause the UE to: If a CSI-RS resource or CSI-RS port is used for single-TRP CSI measurements and multi-TRP CSI measurements, send an indication of the one or more scaling factors to be applied.

54. The UE according to claim 40, wherein, The one or more processors for sending the indication of the one or more CSI-RS capabilities associated with multi-TRP CSI measurements are configured to cause the UE to: If a CSI-RS resource or CSI-RS port is used for multi-TRP CSI measurements, send an indication of the one or more scaling factors to be applied.

55. The UE according to claim 40, wherein, The one or more processors for sending the indication of the one or more CSI-RS capabilities associated with multi-TRP CSI measurements are configured to cause the UE to send an indication of at least one of: One or more scaling factors per frequency band supported by the UE, or One or more scaling factors per frequency band combination supported by the UE.

56. The UE according to claim 40, wherein, The one or more CSI-RS capabilities associated with the multi-TRP CSI measurements further include one or more CSI-RS capabilities supported by the UE per frequency band associated with the following triple: (a) the maximum number of ports per CSI-RS resource in a frequency band, (b) the maximum number of CSI-RS resources supported by the UE in the frequency band for multi-TRP CSI measurements, and (c) the total number of ports supported by the UE in the frequency band for multi-TRP CSI measurements.

57. A network entity for wireless communication, comprising: A memory; And One or more processors coupled to the memory, the one or more processors being configured to cause the network entity to: Receiving an indication of one or more CSI reference signal (CSI-RS) capabilities associated with multi-transmit receive point (multi-TRP) channel state information (CSI) measurements of a user equipment (UE), each CSI-RS capability of the UE indicating at least one of the number of active CSI-RS resources or the number of active CSI-RS ports supported by the UE for multi-TRP CSI measurements, wherein the one or more CSI-RS capabilities associated with the multi-TRP CSI measurements are associated with the following triple: (a) the maximum number of ports per CSI-RS resource of a frequency band combination, (b) the maximum number of CSI-RS resources supported by the UE in the frequency band combination for multi-TRP CSI measurements, and (c) the total number of ports supported by the UE in the frequency band combination for multi-TRP CSI measurements; And Transmitting a CSI report configuration or request associated with the UE for multi-TRP CSI measurements, at least partially based on the one or more CSI-RS capabilities of the UE.

58. The network entity according to claim 57, wherein, The one or more processors for receiving the indication of the one or more CSI-RS capabilities associated with the multi-TRP CSI measurements of the UE are configured to: Receive an indication of one or more codebook combinations supported by the UE, the one or more CSI-RS capabilities being for each codebook combination among the one or more codebook combinations.

59. The network entity according to claim 57, wherein, The one or more processors for receiving the indication of the one or more CSI-RS capabilities associated with the multi-TRP CSI measurements of the UE are configured to cause the network entity to receive an indication of: One or more sets of concurrent codebooks supported by the UE, wherein a set of concurrent codebooks included in the one or more sets of concurrent codebooks includes two or more codebooks and an indication as to whether the set of concurrent codebooks is associated with single-TRP communication or multi-TRP communication, wherein the one or more CSI-RS capabilities of the UE are for each set of concurrent codebooks included in the one or more sets of concurrent codebooks.

60. The network entity according to claim 57, wherein, The one or more processors for receiving the indication of the one or more CSI-RS capabilities associated with the multi-TRP CSI measurements of the UE are configured to receive an indication of: One or more sets of concurrent codebooks supported by the UE, wherein a set of concurrent codebooks included in the one or more sets of concurrent codebooks includes two or more codebooks and an indication as to whether the set of concurrent codebooks is associated with single-TRP communication or multi-TRP communication, the associated CSI-RS of the two or more codebooks will be counted as active CSI-RS resources and CSI-RS ports simultaneously in a time slot, at least one of the two or more codebooks is a codebook pair, wherein the one or more CSI-RS capabilities of the UE correspond to each of the one or more sets of concurrent codebooks supported by the UE.

61. The network entity according to claim 57, wherein, One or more processors for receiving the indication of the one or more CSI-RS capabilities associated with multi-TRP CSI measurements of the UE are configured to receive indications of: A set of codebook pairs associated with multi-TRP communication supported by the UE; and For each codebook pair included in the set of codebook pairs, one or more CSI-RS capabilities of the UE associated with multi-TRP CSI measurements.

62. The network entity according to claim 57, wherein, One or more processors for receiving the indication of the one or more CSI-RS capabilities associated with multi-TRP CSI measurements of the UE are configured to: Receive an indication of one or more scaling factors that will be applied if the UE uses CSI-RS resources or CSI-RS ports for multi-TRP CSI measurements.

63. The network entity according to claim 57, wherein, One or more CSI-RS capabilities related to the multi-TRP CSI measurements are related to one or more sets of concurrent codebooks supported by the UE in a time slot, and wherein a set of concurrent codebooks included in the one or more sets of concurrent codebooks indicates whether the set of concurrent codebooks is associated with both single-TRP communication and multi-TRP communication.

64. The network entity according to claim 57, wherein, One or more CSI-RS capabilities associated with the multi-TRP CSI measurements further include one or more CSI-RS capabilities supported by the UE per frequency band associated with the following triple: (a) the maximum number of ports per CSI-RS resource of a frequency band, (b) the maximum number of CSI-RS resources supported by the UE in the frequency band for multi-TRP CSI measurements, and (c) the total number of ports supported by the UE in the frequency band for multi-TRP CSI measurements.

65. A non - transitory computer - readable medium storing an instruction set for wireless communication, the instruction set comprising: One or more instructions that, when executed by one or more processors of a user equipment (UE), cause the UE to: Transmit an indication of one or more CSI-reference signal (CSI-RS) capabilities associated with multi-transmit receive point (multi-TRP) channel state information (CSI) measurements, each CSI-RS capability indicating at least one of the number of active CSI-RS resources or the number of active CSI-RS ports supported by the UE for multi-TRP CSI measurements, wherein the one or more CSI-RS capabilities related to the multi-TRP CSI measurements are associated with the following triple: (a) the maximum number of ports per CSI-RS resource of a frequency band combination, (b) the maximum number of CSI-RS resources supported by the UE in the frequency band combination for multi-TRP CSI measurements, and (c) the total number of ports supported by the UE in the frequency band combination for multi-TRP CSI measurements; and Receive a CSI report configuration or request for multi-TRP CSI measurements, the CSI report configuration or request being at least partially based on the indication of the one or more CSI-RS capabilities associated with the multi-TRP CSI measurements.

66. A non - transitory computer - readable medium storing an instruction set for wireless communication, the instruction set comprising: One or more instructions which, when executed by one or more processors of a network entity, cause the network entity to perform the following operations: Receive an indication of one or more CSI reference signal (CSI-RS) capabilities associated with multi-transmit receive point (multi-TRP) channel state information (CSI) measurements of a user equipment (UE), each CSI-RS capability of the UE indicating at least one of the number of active CSI-RS resources or the number of active CSI-RS ports supported by the UE for multi-TRP CSI measurements, wherein the one or more CSI-RS capabilities associated with the multi-TRP CSI measurements are associated with the following triple: (a) the maximum number of ports per CSI-RS resource of a frequency band combination, (b) the maximum number of CSI-RS resources supported by the UE in the frequency band combination for multi-TRP CSI measurements, and (c) the total number of ports supported by the UE in the frequency band combination for multi-TRP CSI measurements; and Transmit, at least in part based on the one or more CSI-RS capabilities of the UE, a CSI report configuration or request associated with the UE for multi-TRP CSI measurements.

67. An apparatus for wireless communication, comprising: A unit for transmitting an indication of one or more CSI-reference signal (CSI-RS) capabilities associated with multi-transmit receive point (multi-TRP) channel state information (CSI) measurements, each CSI-RS capability indicating at least one of the number of active CSI-RS resources or the number of active CSI-RS ports supported by the UE for multi-TRP CSI measurements, wherein the one or more CSI-RS capabilities associated with the multi-TRP CSI measurements are associated with the following triple: (a) the maximum number of ports per CSI-RS resource of a frequency band combination, (b) the maximum number of CSI-RS resources supported by the UE in the frequency band combination for multi-TRP CSI measurements, and (c) the total number of ports supported by the UE in the frequency band combination for multi-TRP CSI measurements; and A unit for receiving a CSI report configuration or request for multi-TRP CSI measurements, the CSI report configuration or request being at least in part based on an indication of the one or more CSI-RS capabilities associated with the multi-TRP CSI measurements.

68. The apparatus according to claim 67, wherein, The one or more CSI-RS capabilities associated with the multi-TRP CSI measurements are related to one or more sets of concurrent codebooks supported by the UE in a time slot, and wherein a set of concurrent codebooks included in the one or more sets of concurrent codebooks indicates whether the set of concurrent codebooks is associated with both single-TRP communication and multi-TRP communication.

69. The apparatus according to claim 67, wherein, The one or more CSI-RS capabilities associated with the multi-TRP CSI measurements are associated with one or more codebook combinations supported by the UE; and wherein the unit for transmitting the indication of the one or more CSI-RS capabilities includes a unit for transmitting one or more CSI-RS capabilities for each codebook combination.

70. The apparatus according to claim 67, wherein, The unit for sending the indication of the one or more CSI-RS capabilities includes a unit for sending an indication of the one or more CSI-RS capabilities for multi-TRP CSI measurements for each frequency band combination.

71. The apparatus according to claim 67, wherein, The one or more CSI-RS capabilities associated with the multi-TRP CSI measurements are associated with one or more sets of concurrent codebooks supported by the UE, wherein a set of concurrent codebooks included in the one or more sets of concurrent codebooks includes two or more codebooks and an indication as to whether the set of concurrent codebooks is associated with single-TRP communication or multi-TRP communication, and the associated CSI-RS of the two or more codebooks will be counted as active CSI-RS resources and CSI-RS ports simultaneously in a time slot; and wherein the unit for sending the indication of the one or more CSI-RS capabilities includes a unit for sending an indication of the one or more CSI-RS capabilities for each set of concurrent codebooks included in the one or more sets of concurrent codebooks.

72. The apparatus according to claim 67, wherein, The one or more CSI-RS capabilities are associated with: a set of codebook pairs associated with multi-TRP communication supported by the UE; and for each codebook pair included in the set of codebook pairs, one or more CSI-RS capabilities associated with multi-TRP CSI measurements.

73. The apparatus according to claim 72, wherein the one or more CSI-RS capabilities are associated with a codebook pair including a first codebook to be used by a first TRP associated with multi-TRP communication and a second codebook to be used by a second TRP associated with the multi-TRP communication.

74. The apparatus according to any one of claims 72-73, wherein, The unit for sending the indication of the one or more CSI-RS capabilities associated with the multi-TRP CSI measurements includes a unit for: sending an indication of the set of codebook pairs supported by the UE, and for each set of codebook pairs supported by the UE, sending one or more CSI-RS capabilities associated with the multi-TRP CSI measurements.

75. The apparatus according to claim 67, wherein, The one or more CSI-RS capabilities associated with the multi-TRP CSI measurements are associated with one or more sets of concurrent codebooks supported by the UE, wherein a set of concurrent codebooks included in the one or more sets of concurrent codebooks includes two or more codebooks and an indication as to whether the set of concurrent codebooks is associated with single-TRP communication or multi-TRP communication, and the associated CSI-RS of the two or more codebooks will be counted as active CSI-RS resources and CSI-RS ports simultaneously in a time slot; and wherein the unit for sending the indication of the one or more CSI-RS capabilities includes: a unit for sending an indication of the one or more CSI-RS capabilities for each set of concurrent codebooks included in the one or more sets of concurrent codebooks.

76. The apparatus according to claim 67, wherein, The CSI report configuration or the request indicates at least one of the following: one or more CSI-RS resources, one or more CSI-RS ports, or one or more CSI-RS port groups.

77. The apparatus according to claim 67, wherein, The one or more CSI-RS capabilities associated with the multi-TRP CSI measurements are associated with at least one of the following: One or more CSI-RS capabilities associated with spatial division multiplexing (SDM) multi-TRP CSI measurement, wherein the SDM multi-TRP CSI measurement includes: calculating two precoding matrix indicators (PMIs), which assume that different layers of transmissions associated with the two PMIs are transmitted on the same frequency domain resources and the same time domain resources, One or more CSI-RS capabilities associated with single frequency network (SFN) multi-TRP CSI measurement, wherein the SFN multi-TRP CSI measurement includes: calculating two PMIs, which assume that one or more layers of transmissions associated with the two PMIs are transmitted on the same frequency domain resources and the same time domain resources, One or more CSI-RS capabilities associated with frequency division multiplexing (FDM) multi-TRP CSI measurement, wherein the FDM multi-TRP CSI measurement includes: calculating two PMIs, which assume that one or more layers of transmissions associated with the two PMIs are transmitted on different frequency domain resources, or One or more CSI-RS capabilities associated with time division multiplexing (TDM) multi-TRP CSI measurement, wherein the TDM multi-TRP CSI measurement includes: calculating two PMIs, which assume that one or more layers of transmissions associated with the two PMIs are transmitted on different time domain resources.

78. The apparatus according to claim 67, wherein, The unit for sending the indication of the one or more CSI-RS capabilities associated with the multi-TRP CSI measurement includes a unit for sending an indication of at least one of the following: One or more CSI-RS capabilities associated with spatial division multiplexing (SDM) multi-TRP CSI measurement, One or more CSI-RS capabilities associated with single frequency network (SFN) multi-TRP CSI measurement, One or more CSI-RS capabilities associated with frequency division multiplexing (FDM) multi-TRP CSI measurement, or One or more CSI-RS capabilities associated with time division multiplexing (TDM) multi-TRP CSI measurement.

79. The apparatus according to claim 67, wherein, The unit for sending the indication of the one or more CSI-RS capabilities associated with the multi-TRP CSI measurement includes: A unit for sending an indication of one or more scaling factors associated with the one or more CSI-RS capabilities, wherein the scaling factor indicates: the number of times of counting the CSI-RS resources or CSI-RS ports into the number of active CSI-RS resources or active CSI-RS ports when used by the UE for multi-TRP CSI measurement.

80. The apparatus according to claim 67, wherein, The unit for sending the indication of the one or more CSI-RS capabilities associated with the multi-TRP CSI measurement includes: A unit for sending an indication of one or more scaling factors to be applied if the CSI-RS resources or CSI-RS ports are used for single-TRP CSI measurement and multi-TRP CSI measurement.

81. The apparatus according to claim 67, wherein, The unit for sending the indication of the one or more CSI-RS capabilities associated with the multi-TRP CSI measurement includes: A unit for sending an indication of one or more scaling factors to be applied if CSI-RS resources or CSI-RS ports are used for multi-TRP CSI measurement.

82. The apparatus according to claim 67, wherein, The unit for sending the indication of the one or more CSI-RS capabilities associated with multi-TRP CSI measurement includes a unit for sending an indication of at least one of the following: One or more scaling factors per frequency band supported by the UE, or One or more scaling factors per frequency band combination supported by the UE.

83. An apparatus for wireless communication, comprising: A unit for receiving an indication of one or more CSI reference signal (CSI-RS) capabilities of a user equipment (UE) associated with multi-transmit receive point (multi-TRP) channel state information (CSI) measurement, each CSI-RS capability of the UE indicating at least one of the number of active CSI-RS resources or the number of active CSI-RS ports supported by the UE for multi-TRP CSI measurement, wherein the one or more CSI-RS capabilities related to the multi-TRP CSI measurement are associated with the following triple: (a) the maximum number of ports per CSI-RS resource of a frequency band combination, (b) the maximum number of CSI-RS resources supported by the UE for multi-TRP CSI measurement in the frequency band combination, and (c) the total number of ports supported by the UE for multi-TRP CSI measurement in the frequency band combination; and A unit for sending a CSI report configuration or request for multi-TRP CSI measurement associated with the UE, at least partially based on the one or more CSI-RS capabilities of the UE.

84. The apparatus according to claim 83, wherein, The unit for receiving the indication of the one or more CSI-RS capabilities of the UE associated with multi-TRP CSI measurement includes: A unit for receiving an indication of one or more codebook combinations supported by the UE, and the one or more CSI-RS capabilities are for each codebook combination among the one or more codebook combinations.

85. The apparatus according to claim 83, wherein, The unit for receiving the indication of the one or more CSI-RS capabilities of the UE associated with multi-TRP CSI measurement includes a unit for receiving an indication of the following: One or more sets of concurrent codebooks supported by the UE, wherein a set of concurrent codebooks included in the one or more sets of concurrent codebooks includes two or more codebooks, and an indication of whether the set of concurrent codebooks is associated with single-TRP communication or multi-TRP communication, and the one or more CSI-RS capabilities of the UE are for each set of concurrent codebooks included in the one or more sets of concurrent codebooks.

86. The apparatus according to claim 83, wherein, The unit for receiving the indication of the one or more CSI-RS capabilities of the UE associated with multi-TRP CSI measurement includes a unit for receiving an indication of the following: One or more sets of concurrent codebooks supported by the UE, wherein a concurrent codebook set included in the one or more sets of concurrent codebooks includes two or more codebooks, and an indication associated with whether the concurrent codebook set is for communication with a single TRP or multiple TRPs, and the associated CSI-RSs of the two or more codebooks will count as active CSI-RS resources and CSI-RS ports simultaneously in a time slot, and at least one of the two or more codebooks is a codebook pair, and wherein the one or more CSI-RS capabilities of the UE correspond to each item in the one or more sets of concurrent codebooks supported by the UE.

87. The apparatus according to claim 83, wherein, The unit for receiving the indication of the one or more CSI-RS capabilities of the UE associated with multi-TRP CSI measurement includes a unit for receiving an indication of: A set of codebook pairs associated with multi-TRP communication supported by the UE; and For each codebook pair included in the set of codebook pairs, one or more CSI-RS capabilities of the UE associated with multi-TRP CSI measurement.

88. The apparatus according to claim 83, wherein, The unit for receiving the indication of the one or more CSI-RS capabilities of the UE associated with multi-TRP CSI measurement includes: A unit for receiving an indication of one or more scaling factors, which will be applied if the UE uses CSI-RS resources or CSI-RS ports for multi-TRP CSI measurement.

89. The apparatus according to claim 83, wherein, One or more CSI-RS capabilities related to the multi-TRP CSI measurement are related to one or more sets of concurrent codebooks supported by the UE in a time slot, and wherein a concurrent codebook set included in the one or more sets of concurrent codebooks indicates whether the concurrent codebook set is associated with both single-TRP communication and multi-TRP communication.

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