Multi-channel state information feedback for multi-user multiple-input multiple-output pairing

Abstract

This disclosure provides systems, apparatus, devices, and methods for multiple CSI feedback of MU-MIMO pairing, including a computer program encoded on a storage medium. A UE (102) receives (304) from a network entity (104) an instruction for a CSI report configuration including: multiple CSI-RS resources for channel measurements, a codebook configuration, and reporting parameters that cause the CSI report to include multiple CSIs. The UE (102) receives (308) multiple CSI-RSs from the network entity (104) on the multiple CSI-RS resources for channel measurements. The UE (102) transmits (310) to the network entity (104) a CSI report including multiple CSIs measured from the multiple CSI-RSs based on the CSI report configuration.

Description

Technical Field

[0001] This disclosure generally relates to wireless communications, and more particularly to multi-channel state information (CSI) feedback for multi-user multiple-input multiple-output (MU-MIMO) pairings. Background Technology

[0002] The 3rd Generation Partnership Project (3GPP) specifies a radio interface known as Fifth Generation (5G) New Radio (NR) (5G NR). The architecture of a 5G NR wireless communication system includes a 5G core (5GC) network, a 5G radio access network (5G-RAN), and user equipment (5G UE). Compared to previous generations of cellular communication systems, the 5G NR architecture aims to provide increased data rates, reduced latency, and / or increased capacity.

[0003] Generally, wireless communication systems provide various telecommunications services (e.g., telephony, video, data, messaging, etc.) based on multiple access technologies that support communication with multiple users (such as Orthogonal Frequency Division Multiple Access (OFDMA)). Improvements in mobile broadband have continued this development of wireless communication technologies. For example, improvements in spectral efficiency are achieved using multi-CSI feedback paired with MU-MIMO. Summary of the Invention

[0004] The following is a simplified overview of one or more aspects to provide a basic understanding of such aspects. This overview is not a comprehensive summary of all anticipated aspects. It neither identifies key or essential elements of all aspects nor describes the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed descriptions that follow.

[0005] Network entities, such as base stations or base station units, can configure CSI reports so that UEs can indicate CSI based on measurements of the downlink channel. In MIMO systems, CSI can provide useful information for network entities to select the digital precoder for the UE.

[0006] To improve cell coverage and spectral efficiency (SE), network entities can operate on the Physical Downlink Shared Channel (PDSCH) of multiple UEs using MU-MIMO. In some examples, network entities use the same analog beam and different digital precoders to transmit on the PDSCH of different UEs.

[0007] In other examples, network entities use different analog beams and digital precoders to transmit on the PDSCH of different UEs, which may require the network entity to use more than one antenna panel. In scenarios with two UEs, the network entity needs CSIs measured from two beams from both UEs so that the network entity can determine whether the two beams for the two UEs are orthogonal or do not cause strong mutual interference. Therefore, the network entity can transmit to the first UE using the first beam and to the second UE using the second beam, where the first UE does not experience strong interference from the second beam and the second UE does not experience strong interference from the first beam. However, MU-MIMO pairing is difficult when a UE reports only one CSI for a beam.

[0008] This disclosure addresses the aforementioned and other deficiencies by having the UE report multiple CSIs for different beams. Based on the UE's capabilities, a network entity transmits control signaling configured to include the following CSI reporting configurations: a list of CSI Reference Signals (CSI-RS) resources for channel measurements, at least one codebook configuration, parameters configuring CSI reports including multiple CSIs, and optionally configuring at least one of the following parameters: a list of CSI-RS resources for interference measurements, a list of CSI Interference Measurement (CSI-IM) resources for interference measurements, at least one frequency granularity for CSI reporting, at least one codebook subset restriction, or at least one rank restriction. The network entity may transmit control signaling to activate or trigger CSI reporting. The network transmits CSI-RS using different transmission beams based on the configured CSI-RS resources for channel measurements and / or the configured CSI-RS / CSI-IM resources for interference measurements. When the CSI report meets the requirements of minimum processing latency and CSI processing unit (CPU) occupancy rules, the UE transmits a CSI report that includes multiple CSIs corresponding to different beams based on the CSI-RS and CSI report configuration.

[0009] According to several aspects, the UE receives from the network entity a CSI report configuration indicating the following: multiple CSI-RS resources for channel measurements, codebook configuration, and report parameters that enable the CSI report to include multiple CSIs. The UE receives multiple CSI-RSs from the network entity on multiple CSI-RS resources. The UE transmits a CSI report to the network entity that includes multiple CSIs measured from the multiple CSI-RSs based on the CSI report configuration.

[0010] Depending on several aspects, the network entity transmits to the UE an instruction for the following CSI report configuration: multiple CSI-RS resources for channel measurements, codebook configuration, and reporting parameters that enable the CSI report to include multiple CSIs. The network entity transmits multiple CSI-RSs to the UE on the multiple CSI-RS resources. The network entity receives from the UE a CSI report including multiple CSIs measured from the multiple CSI-RSs based on the CSI report configuration. Attached Figure Description

[0011] Figure 1 An illustration of a wireless communication system according to an embodiment is shown, the wireless communication system including multiple user equipment (UE) and network entities communicating on one or more cells.

[0012] Figures 2A to 2B An illustration of a MU-MIMO scheme according to an embodiment is shown.

[0013] Figure 3 A signaling diagram illustrating the communication between the UE and a network entity for multiple CSI feedbacks for MU-MIMO according to an embodiment is shown.

[0014] Figures 4A to 4E An illustration of a CSI report based on multiple reported CSIs, according to an embodiment, is shown.

[0015] Figure 5 This is a flowchart of a wireless communication method at the UE according to an embodiment.

[0016] Figure 6 This is a flowchart of a method for wireless communication at a network entity according to an embodiment.

[0017] Figure 7 This is a diagram illustrating a hardware implementation of an example UE device according to some embodiments.

[0018] Figure 8 This is an illustration showing a hardware implementation of one or more example network entities according to some embodiments.

[0019] exist Figures 1 to 8 In the accompanying drawings, the same reference numerals refer to the same features. Detailed Implementation

[0020] Figure 1A diagram 100 illustrates a wireless communication system associated with multiple cells 190. The wireless communication system includes user equipment (UE) 102 and base station / network entity 104. Some base stations may include an aggregated base station architecture, and others may include a decomposed base station architecture. The aggregated base station architecture utilizes a radio protocol stack physically or logically integrated within a single radio access network (RAN) node. The decomposed base station architecture utilizes a protocol stack physically or logically distributed across two or more units (e.g., radio unit (RU) 106, distributed unit (DU) 108, central unit (CU) 110). For example, CU 110 is implemented within a RAN node, and one or more DU 108s may be located in the same location as CU 110, or alternatively, may be geographically or virtually distributed across one or more other RAN nodes. DU 108 may be implemented to communicate with one or more RU 106s. Any of RU 106, DU 108, and CU 110 can be implemented as a virtual unit, such as a virtual radio unit (VRU), a virtual distributed unit (VDU), or a virtual central unit (VCU). Base station / network entity 104 (e.g., an aggregated base station or a decomposed unit of a base station, such as RU 106 or DU 108) can be referred to as a transmit receiver point (TRP).

[0021] The operation and / or network design of base station 104 can be based on the aggregation characteristics of base station functionality. For example, a decomposed base station architecture can be utilized in an Integrated Access Backhaul (IAB) network, an Open Radio Access Network (O-RAN) network, or a Virtual Radio Access Network (vRAN) (which may also be referred to as a Cloud Radio Access Network (C-RAN)). Decomposition can include distributing functionality across two or more units in various physical locations, as well as virtually distributing functionality for at least one unit, which allows for flexibility in network design. Various units in a decomposed base station architecture or a decomposed RAN architecture can be configured to communicate with at least one other unit via wired or wireless communication. For example, base stations 104d, 104e and / or RUs 106a, 106b, 106c, 106d can communicate with UEs 102a, 102b, 102c, 102d and / or 102s via one or more radio frequency (RF) access links based on a Uu interface. In the example, multiple RUs 106 and / or base stations 104 can simultaneously serve UE 102, such as through intra-cell and / or inter-cell access links between UE 102 and RUs 106 / base stations 104.

[0022] RU 106, DU 108, and CU 110 may include (or may be coupled to) one or more interfaces configured to transmit or receive information / signals via wired or wireless transmission media. For example, a wired interface may be configured to transmit or receive information / signals via a wired transmission medium—such as a fronthaul link 160 between RU 106d and a baseband unit (BBU) 112 of base station 104d associated with cell 190d. BBU 112 includes DU 108 and CU 110, and may also have a wired interface (e.g., a midhaul link) configured between DU 108 and CU 110 for transmitting or receiving information / signals between DU 108 and CU 110. In a further example, a wireless interface that may include a receiver, transmitter, or transceiver (such as an RF transceiver) may be configured to transmit and / or receive information / signals via a wireless transmission medium, such as information transmitted between RU 106a in cell 190a and base station 104e in cell 190e via inter-cell communication beams 136-138 of RU 106a and base station 104e.

[0023] RU 106 can be configured to implement low-level functionality. For example, RU 106 is controlled by DU 108 and can correspond to a logical node that manages RF processing functions or low-level PHY functionality, such as performing Fast Fourier Transform (FFT), Inverse FFT (iFFT), digital beamforming, Physical Random Access Channel (PRACH) extraction, and filtering. The functionality of RU 106 can be based on functional partitioning, such as low-level functional partitioning.

[0024] RU 106 can transmit or receive over-the-air (OTA) communications with one or more UEs 102. For example, RU 106b of cell 190b communicates with UE 102b of cell 190b via a first communication beamset 132 of RU 106b and a second communication beamset 134b of UE 102b, which may correspond to inter-cell communication beamsets or, in some examples, inter-cell communication beamsets. For example, UE 102b of cell 190b can communicate with RU 106a of cell 190a via a third communication beamset 134a of UE 102b and a fourth communication beamset 136 of RU 106a. DU 108 can control the real-time and non-real-time characteristics of control plane and user plane communications of RU 106.

[0025] Any combination of RU 106, DU 108, and CU 110, or a reference to them individually, may correspond to base station 104. Therefore, base station 104 may include at least one of RU 106, DU 108, or CU 110. Base station 104 provides UE 102 with access to the core network. Base station 104 may relay communication between UE 102 and the core network (not shown). Base station 104 may be associated with macro cells of high-power cellular base stations and / or small cells of low-power cellular base stations. For example, cell 190e may correspond to a macro cell, while cells 190a-190d may correspond to small cells. Small cells include femtocells, picocells, microcells, etc. A network including at least one macro cell and at least one small cell may be referred to as a "heterogeneous network".

[0026] Transmissions from UE 102 to base station 104 / RU 106 are called uplink (UL) transmissions, while transmissions from base station 104 / RU 106 to UE 102 are called downlink (DL) transmissions. Uplink transmissions can also be referred to as reverse link transmissions, and downlink transmissions can also be referred to as forward link transmissions. For example, RU 106d uses the antenna of base station 104d in cell 190d to transmit downlink / forward link communication to UE 102d, or receive uplink / reverse link communication from UE 102d, based on the Uu interface associated with the access link between UE 102d and base station 104d / RU 106d.

[0027] The communication link between UE 102 and base station 104 / RU 106 can be based on multiple-input multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming, and / or transmit diversity. The communication link can be associated with one or more carriers. UE 102 and base station 104 / RU 106 can utilize up to a total of Yx Each carrier allocated in MHz carrier aggregation Y Spectral bandwidths of MHz (e.g., 5 MHz, 10 MHz, 15 MHz, 20 MHz, 100 MHz, 400 MHz, 800 MHz, 1600 MHz, 2000 MHz, etc.), where x Each component carrier (CC) is used for communication in each of the uplink and downlink directions. The carriers may or may not be adjacent to each other along the spectrum. In the example, uplink and downlink carriers may be allocated asymmetrically, with more or fewer carriers allocated to the uplink or downlink. A component carrier may include a primary component carrier and one or more secondary component carriers. The primary component carrier may be associated with a primary cell (PCell), and the secondary component carriers may be associated with secondary cells (SCells).

[0028] Some UEs, such as UEs 102a and 102s, can perform device-to-device (D2D) communication via a sidelink. For example, the sidelink / D2D communication link utilizes the spectrum of the Wireless Wide Area Network (WWAN) associated with uplink and downlink communication. Such sidelink / D2D communication can be performed by various wireless communication systems such as Wi-Fi, Bluetooth, LTE, and NR systems.

[0029] UE 102 and base station 104 / RU 106 may each include multiple antennas. These multiple antennas may correspond to antenna elements, antenna panels, and / or antenna arrays that facilitate beamforming operation. For example, RU 106b transmits downlink beamforming signals to UE 102b based on a first communication beamset 132 in one or more transmission directions of RU 106b. UE 102b may receive downlink beamforming signals from RU 106b based on a second communication beamset 134b in one or more reception directions of UE 102b. In a further example, UE 102b may also transmit uplink beamforming signals (e.g., sounding reference signals (SRS)) to RU 106b based on the second communication beamset 134b in one or more transmission directions of UE 102b. RU 106b may receive uplink beamforming signals from UE 102b in one or more reception directions of RU 106b. UE 102b can perform beamforming to determine the optimal reception and transmission directions for beamformed signals. The transmission and reception directions of UE 102 and base station 104 / RU 106 can be the same or different.

[0030] In a further example, beamforming signals can be transmitted between a first base station / RU 106a and a second base station 104e. For example, base station 104e of cell 190e can transmit beamforming signals to RU 106a based on communication beam 138 in one or more transmission directions of base station 104e. RU 106a can receive beamforming signals from base station 104e of cell 190e based on RU communication beam 136 in one or more reception directions of RU 106a. In a further example, base station 104e transmits downlink beamforming signals to UE 102e based on communication beam 138 in one or more transmission directions of base station 104e. UE 102e receives downlink beamforming signals from base station 104e based on UE communication beam 130 in one or more reception directions of UE 102e. UE 102e can also transmit uplink beamforming signals to base station 104e in one or more transmission directions of UE 102e based on UE communication beam 130, so that base station 104e can receive uplink beamforming signals from UE 102e in one or more receiving directions of base station 104e.

[0031] Base station 104 may include and / or be referred to as a network entity. That is, "network entity" may refer to base station 104 or at least one element of base station 104, such as RU 106, DU 108, and / or CU 110. Base station 104 may also include and / or be referred to as Next Generation Evolved Node B (ng-eNB), Next Generation NB (gNB), Evolved NB (eNB), access point, base transceiver, radio base station, radio transceiver, transceiver function, Basic Service Set (BSS), Extended Service Set (ESS), TRP, network node, network device, or other related terms. Base station 104 or the entity at base station 104 may be implemented as an IAB node, relay node, sidelink node, aggregated (monolithic) base station, or a decomposed base station including one or more RU 106, DU 108, and / or CU 110. Aggregated or decomposed base station sets may be referred to as Next Generation Radio Access Network (NG-RAN). In some examples, UE 102a operates in dual connectivity (DC) with base station 104e and base station / RU 106a. In such a case, base station 104e can be the primary node, while base station / RU 160a can be the secondary node.

[0032] Still referencing Figure 1In some respects, any UE in UE 102 may include a multi-CSI component 140 configured to receive from a network entity a CSI report configuration indicating the following: multiple CSI-RS resources for channel measurements, a codebook configuration, and report parameters that enable the CSI report to include multiple CSIs. The multi-CSI component 140 is further configured to receive multiple CSI-RSs from the network entity on the multiple CSI-RS resources. The multi-CSI component 140 is further configured to transmit to the network entity a CSI report including multiple CSIs measured from the multiple CSI-RSs based on the CSI report configuration.

[0033] In some aspects, any base station or network entity of base station 104 may include a multi-CSI configuration component 150 configured to transmit to the UE a CSI report configuration indicating the following: multiple CSI-RS resources for channel measurements, a codebook configuration, and reporting parameters that cause the CSI report to include multiple CSIs. The multi-CSI configuration component 150 is further configured to transmit multiple CSI-RSs to the UE on the multiple CSI-RS resources. The multi-CSI configuration component 150 is further configured to receive from the UE a CSI report including multiple CSIs measured from the multiple CSI-RSs based on the CSI report configuration.

[0034] therefore, Figure 1 A wireless communication system that can be implemented in conjunction with aspects of one or more other accompanying figures described herein is described. Furthermore, although the following description may focus on 5G NR, the concepts described herein are applicable to other similar fields, such as 5G-Advanced and future versions, LTE, LTE-advanced (LTE-A), and other wireless technologies such as 6G.

[0035] Figure 2A Illustration 200a shows a first MU-MIMO scheme according to an embodiment. To improve cell coverage and spectral efficiency (SE), network entities can transmit the Physical Downlink Shared Channel (PDSCH) of multiple UEs based on multi-user MIMO (MU-MIMO) operation. In some aspects, network entities can transmit the PDSCH of different UEs based on the same analog beam and different digital precoders, which is referred to as... Figure 2AThe first MU-MIMO scheme is shown. Network entities can transmit from an antenna panel having multiple horizontal beams (e.g., 2 horizontal beams) and multiple vertical beams (e.g., 4 vertical beams). Furthermore, network entities can transmit using multiple horizontal precoders per beam (e.g., 8 horizontal precoders per beam) and multiple vertical precoders per beam (e.g., 4 vertical precoders per beam). For example, a network entity can use beam 201 and precoder 202a to transmit a first PDSCH to a first UE 102a. A network entity can use beam 201 and precoder 202b to transmit a second PDSCH to a second UE 102b.

[0036] For the first MU-MIMO scheme, the network entity selects orthogonal precoders 202a and 202b to transmit the PDSCH of both the first UE 102a and the second UE 102b. Therefore, the network entity requires the beam-measured CSI of both the first UE 102a and the second UE 102b to create the orthogonal digital precoder and select the modulation and coding scheme (MCS) for both the first UE 102a and the second UE 102b.

[0037] Figure 2B Illustration 200b shows a second MU-MIMO scheme according to an embodiment. In some aspects, network entities can transmit the PDSCH of the first UE 102a and the second UE 102b based on the use of more than one antenna panel, based on different analog beams 201a, 201b and digital precoders 202a, 202b, such as Figure 2B As shown. For the second MU-MIMO scheme, the network entity needs CSI measurements from both the first UE 102a and the second UE 102b from both beams, so that the network entity can determine whether the two beams for the first UE 102a and the second UE 102b are orthogonal or whether the two beams will cause mutual interference. Therefore, to apply the second MU-MIMO scheme, the network entity can transmit PDSCH from the first beam 201a to the first UE 102a and from the second beam 201b to the second UE 102b, so that the first beam and the second beam do not interfere with each other. Therefore, to facilitate MU-MIMO pairing, the first UE 102a and the second UE 102b can report CSI for different beams. To report multiple CSIs, the first UE 102a and the second UE 102b can be configured with respect to the codebook / channel measurement resources (CMR) / interference measurement resources (IMR) used for CSI reporting, the selection of the beam used for CSI reporting, the CSI report content and format, the minimum CSI processing delay, and the CSI processing unit (CPU) occupancy rules.

[0038] Figure 3 Signaling diagram 300 illustrates communication between UE 102 and network entity 104 for multiple CSI feedback for MU-MIMO according to an embodiment. UE 102 may optionally transmit 302 to network entity 104 an indication of UE capabilities for supported configurations of CSI reports including multiple CSIs. UE 102 can report at least one of the following UE capabilities: support for CSI reporting including multiple CSIs; the maximum number of reported CSIs; the maximum number of CSI-RS resources of a CMR configured for CSI reporting; the maximum number of antenna ports on a CMR configured for CSI reporting; supported time-domain behavior for the CMR (e.g., periodic, semi-persistent, aperiodic); supported time-domain behavior for CSI reporting (e.g., periodic, semi-persistent, aperiodic, UE-initiated / event-driven); supported codebook types for CSI reporting with multiple CSIs (e.g., Type 1 single-panel codebook (as defined in Section 5.2.2.2.1 of 3GPP Technical Specification (TS) 38.214)), Type 1 multi-panel codebook (as defined in Section 5.2.2.2.2 of 3GPP TS 38.214), and Type 2 codebook (as defined in 3GPP TS 38.214)). The following are defined in Section 5.2.2.2.3 of 3GPP TS 38.214: Type 2 port selection codebook (as defined in Section 5.2.2.2.4 of 3GPP TS 38.214), eType 2 codebook (as defined in Section 5.2.2.2.5 of 3GPP TS 38.214), eType 2 port selection codebook (as defined in Section 5.2.2.2.6 of 3GPP TS 38.214), FeType 2 port selection codebook (as defined in Section 5.2.2.2.7 of 3GPP TS 38.214), eType 2 codebook for coherent joint transmission (as defined in Section 5.2.2.2.8 of 3GPP TS 38.214), and FeType 2 port selection codebook for coherent joint transmission (as defined in 3GPP TS 38.214). The eType2 codebook for the predicted PMI (as defined in Section 5.2.2.2.9 of 38.214), and / or the FeType2 port selection codebook for the predicted PMI (as defined in Section 5.2.2.2.10 of 3GPP TS 38.214), and / or the FeType2 port selection codebook for the predicted PMI (as defined in Section 5.2.2.2.11 of 3GPP TS 38.214).

[0039] Network entity 104 transmits 304 control signaling, which configures the following CSI report configurations: multiple CSI-RS resources for channel measurements (e.g., a list of CSI-RS resources for channel measurements), at least one codebook configuration, and parameters configuring CSI reports including multiple CSIs. In some aspects, the network entity may optionally configure at least one of the following: a list of CSI-RS resources for interference measurements, a list of CSI-IM resources for interference measurements, at least one frequency granularity for CSI reports, at least one codebook subset restriction, and / or at least one rank restriction. Network entity 104 may transmit RRC signaling (e.g., RRCReconfiguration or CSI-ReportConfig Transmit 304 control signaling to UE 102.

[0040] In some aspects, network entity 104 configures a list of CSI-RS resources for channel measurement. Network entity 104 may configure a list of CSI-RS resources for interference measurement and / or a list of CSI-IM resources for interference measurement. In some aspects, the number of CSI-RS resources for channel measurement may be the same as the number of CSI-RS resources for interference measurement. The CSI-RS resources for channel measurement and the CSI-RS / CSI-IM resources for interference measurement may have a one-to-one resource association. UE 102 measures a CSI based on a CSI-RS resource for channel measurement and its associated CSI-RS / CSI-IM resources. UE 102 may apply the same spatial domain receive filter to receive the CSI-RS resources for channel measurement and the associated CSI-RS / CSI-IM resources.

[0041] In some respects, CSI-RS resources used for channel measurements can be associated with common CSI-RS / CSI-IM resources used for interference measurements. UE 102 can measure a CSI based on a CSI-RS resource used for channel measurements and the associated CSI-RS / CSI-IM resources. In some respects, network entity 104 may not configure a Quasi-Co-location (QCL) Type D (Spatial Receive Parameter) indication in the TCI state of the CSI-RS resource used for channel measurements.

[0042] In some respects, for semi-persistent CSI reports or aperiodic CSI reports, network entity 104 may optionally transmit a Media Access Control Element (MAC CE) or Downlink Control Information (DCI) that activates or triggers the CSI report. For semi-persistent CSI-RS or aperiodic CSI-RS, the network entity may transmit a MAC CE or DCI that activates or triggers the CSI-RS.

[0043] In all respects, network entity 104 transmits 308 CSI-RS on CSI-RS resources in the CSI-RS resource set used for channel measurements based on the same time-domain behavior. Network entity 104 can configure the same value for at least one of the parameters of the CSI-RS resources in the CSI-RS resource set used for channel measurements, including at least one of the following: bandwidth, subcarrier, periodicity, number of antenna ports, energy per resource element (EPRE) ratio between PDSCH and CSI-RS (e.g., powerControlOffset ), the EPRE ratio between CSI-RS and auxiliary synchronization signal (SSS) (e.g., powerControlOffsetSS ) and / or scrambling identifier (ID). Network entity 104 may transmit 308 CSI-RS on CSI-RS resources in the CSI-RS resource set for channel measurement within one time slot or S consecutive time slots, where S may be predefined (e.g., S=2) or reported by UE capabilities. Therefore, UE 102 expects network entity 104 to configure the same value for at least one of the parameters of the CSI-RS resources in the CSI-RS resource set for channel measurement, including at least one of the following: bandwidth, subcarrier, periodicity, number of antenna ports, EPRE ratio between PDSCH and CSI-RS (e.g., powerControlOffset ), the EPRE ratio between CSI-RS and SSS (e.g., powerControlOffsetSS ) and / or scrambling ID. UE 102 may further expect network entity 104 to transmit 308 CSI-RS on CSI-RS resources within the CSI-RS resource set used for channel measurement in one time slot or S consecutive time slots (e.g., S=2).

[0044] In some respects, network entity 104 can suppress the configuration of more than one resource group for CMR. Therefore, network entity 104 can suppress CSI reports with multiple CSIs configured based on an incoherent joint transport scheme.

[0045] In some respects, network entity 104 configures at least one codebook configuration for CSI-RS resources used for channel measurements (e.g., codebookConfig Network entity 104 can configure a common codebook configuration for CSI-RS resources used for channel measurements. In some aspects, network entity 104 can configure separate codebook configurations, where different codebook configurations correspond to different CSI-RS resources used for channel measurements.

[0046] In some respects, network entity 104 can suppress CSI reporting with multiple CSIs configured for a specific codebook type (e.g., Type 1 single-panel codebook, Type 1 multi-panel codebook, Type 2 codebook, Type 2 port selection codebook, eType 2 codebook, eType 2 port selection codebook, FeType 2 port selection codebook, eType 2 codebook for coherent joint transmission, FeType 2 port selection codebook for coherent joint transmission, eType 2 codebook for predicted PMI and / or FeType 2 port selection codebook for predicted PMI).

[0047] In some aspects, network entity 104 configures at least one codebook subset restriction for CSI-RS resources used for channel measurements. The codebook subset restriction indicates a subset of candidate precoders from the configured codebook used for CSI reporting. Network entity 104 may configure a common codebook subset restriction for CSI-RS resources used for channel measurements. In some aspects, network entity 104 may configure separate codebook subset restrictions, wherein different codebook subset restrictions correspond to different CSI-RS resources used for channel measurements.

[0048] In some aspects, network entity 104 configures at least one rank indicator (RI) limit, i.e., a rank limit, for CSI-RS resources used for channel measurements. The RI limit indicates a list of candidate ranks for CSI reporting. Network entity 104 may configure a common RI limit for CSI-RS resources used for channel measurements. In other aspects, network entity 104 configures separate RI limits, where different RI limits correspond to different CSI-RS resources used for channel measurements.

[0049] UE 102 may determine whether to report CSI for received CSI-RS resources and / or CSI-IM resources based on whether the scheduling offset meets the minimum processing latency requirement and CPU usage rules. If UE 102 determines to report CSI, UE 102 may transmit the CSI report to network entity 104 via an uplink channel (e.g., PUSCH or PUCCH) based on the CSI reporting configuration.

[0050] In some respects, UE 102 may determine whether to report CSI for CSI-RS resources based on the measured CSI and / or beam quality of the CSI-RS resources. UE 102 may determine to report CSI for CSI-RS resources if it determines that one or more of the following conditions are true: The measured beam quality of the CSI-RS resource (e.g., Layer 1 Reference Signal Received Power (L1-RSRP) or Layer 1 Signal-to-Interference-plus-Noise Ratio (L1-SINR)) meets a first threshold criterion (e.g., the measured beam quality is higher than or equal to a first threshold). The measured beam quality of the CSI-RS resource (e.g., L1-RSRP / L1-SINR) is higher than or equal to the highest beam quality among the CSI-RS resources in the CSI-RS resource set minus a first offset. The measured channel quality indicator (CQI) of the CSI-RS resource meets a second threshold criterion (e.g., the measured CQI for the CSI-RS resource is higher than or equal to a second threshold). The measured CQI of the CSI-RS resource is greater than or equal to the highest CQI among the CSI-RS resources in the CSI-RS resource set minus a second offset. The measured spectral efficiency (SE) of the CSI for the CSI-RS resource meets a third threshold criterion (e.g., the SE of the measured CQI for the CSI-RS resource is higher than or equal to a third threshold). The SE of the measured CSI used for CSI-RS resources is higher than or equal to the highest SE of the CSI-RS resources in the CSI-RS resource set minus the third offset.

[0051] In some respects, the first threshold, the second threshold, and / or the third threshold may be predefined or configured by the network entity. In some respects, the first offset, the second offset, and / or the third offset may be predefined or configured by the network entity.

[0052] In some aspects, network entity 104 configures a CSI-RS resource selection scheme. In an example, for a first MU-MIMO scheme, the first CSI-RS resource selection scheme includes reporting the top N CSIs (e.g., CSIs from CSI-RS resources with the best beam quality, highest CQI, and / or highest SE). In another example, for a second MU-MIMO scheme, the second CSI-RS resource selection scheme includes reporting the top N1 CSIs (e.g., CSIs from CSI-RS resources with the best beam quality, highest CQI, and / or highest SE) and the next N2 CSIs (e.g., CSIs from CSI-RS resources with the lowest beam quality, lowest CQI, and / or lowest SE), where N1 and N2 can be predefined or configured by the network entity. In some aspects, the CSI-RS resource selection scheme can be predefined.

[0053] In some aspects, CSI reports may include at least one of CSI-RS Resource Indicator (CRI), RI, PMI, CQI, and / or LI. UE 102 may report CSI based on the configured frequency domain granularity. Therefore, UE 102 may report broadband CSI including at least one of CRI, RI, LI, broadband CQI, and / or broadband PMI. UE 102 may report subband CSI including CQI and / or PMI for each subband.

[0054] In some aspects, network entity 104 may configure a single PUCCH / PUSCH resource for UE 102 to report CSIs. In other aspects, the network entity may configure multiple PUCCH / PUSCH resources for UE 102 to report CSIs. UE 102 may report different CSIs in different PUCCH / PUSCH resources. Alternatively, UE 102 may report the same CSI in different PUCCH / PUSCH resources to increase the probability that the CSI is correctly decoded by network entity 104.

[0055] In some aspects, network entity 104 can be configured with at least one reporting quantity indicating the reporting content for each CSI. Network entity 104 can also configure a common reporting quantity for each CSI indicating common reporting content. Alternatively, the network entity can configure separate reporting quantities, where different reporting quantities correspond to different CSIs.

[0056] Network entity 104 may configure UE 102 to report at least one of the following for each CSI: wideband precoder information for CRI, RI, PMI, CQI, LI, and / or PMI. In one example, network entity 104 may configure at least one of the following reporting quantities: cri-RI-PMI-CQI , cri-RI-i1 , cri-RI-i1-CQI , cri-RI-CQI and / or cri- RI-LI-PMI-CQI UE 102 can report the corresponding CSI component based on the configured reporting amount.

[0057] In some respects, UE 102 can report a CRI component to jointly report the CRI for each CSI. For example, as referenced Figure 4B , Figure 4C and Figure 4D The UE 102 may report a CRI bitmap indicating which CSI-RS resources the reported CSI corresponds to. In some aspects, the UE 102 may report the common RI of all reported CSIs.

[0058] In some respects, UE 102 reports the CSI components from the first reported CSI-RS resource to the last reported CSI-RS resource, and the next CSI component from the first reported CSI-RS resource to the last reported CSI-RS resource. Table 1 shows an example of a broadband CSI report that includes multiple CSIs of CSI component 1.

[0059]

[0060] Table 1

[0061] In some respects, UE 102 reports all CSI components from the CSI portion of the first reported CSI-RS resource (e.g., wideband CSI in CSI portion 1, wideband CSI in CSI portion 2, and subband CSI in CSI portion 2), and then reports all CSI components from the CSI portion of the next reported CSI-RS resource (e.g., wideband CSI in CSI portion 1, wideband CSI in CSI portion 2, and subband CSI in CSI portion 2). Table 2 shows an example of a wideband CSI report that includes multiple CSIs from CSI portion 1.

[0062]

[0063] Table 2

[0064] In some respects, for CSI reports comprising multiple CSIs, after CSI report (re)configuration, serving cell activation, bandwidth portion (BWP) change, or activation of a semi-persistent (SP)-CSI report, UE 102 shall report a CSI report (or a CSI within a CSI report) only after receiving at least one CSI-RS transmission opportunity for each CSI-RS resource in the corresponding CSI-RS resource set for channel measurements and one CSI-RS and / or CSI-IM resource transmission opportunity in the corresponding resource set for interference measurements, no later than the CSI reference resource and within the same discontinuous reception (DRX) activity time (when DRX is configured), otherwise the report shall be discarded. The CSI reference resource may be as defined in Section 5.2.2.5 of 3GPP TS 38.214.

[0065] In some respects, for CSI reports that include multiple CSIs, after CSI report (re)configuration, serving cell activation, BWP change, or SP-CSI report activation, UE 102 reports a CSI report (or a CSI in a CSI report) only after receiving at least one CSI-RS transmission opportunity for each CSI-RS resource in the corresponding CSI-RS resource set for channel measurement and one CSI-RS and / or CSI-IM resource transmission opportunity in the corresponding resource set for interference measurement, no later than the CSI reference resource and during the active period of cell discontinuous transmission (DTX) (when DTX is configured), otherwise the report is discarded.

[0066] In some respects, for CSI reports that include multiple CSIs, after CSI report (re)configuration, serving cell activation, BWP change, or SP-CSI activation, the UE shall report the CSI report (or the CSI in the CSI report) only after receiving at least one CSI-RS transmission opportunity for each CSI-RS resource in the corresponding CSI-RS resource set for channel measurement and one CSI-RS and / or CSI-IM resource transmission opportunity in the corresponding resource set for interference measurement, no later than the CSI reference resource and within the same discontinuous reception (DRX) activity time (when DRX is configured) and cell DTX activity time (when cell DTX is configured), otherwise the report shall be discarded.

[0067] In some respects, network entity 104 and / or UE 102 may determine the minimum processing delay for CSI reports that include multiple CSIs based on at least one of the following factors: the number of CSI-RS resources used for channel measurements (K); the codebook configuration of each CSI-RS resource; the number of reported CSIs (N); the frequency granularity of the CSI reports; and / or the UE's capability for the minimum processing delay.

[0068] In some aspects, UE 102 calculates the CSI of all configured CSI-RS resources in the CSI-RS resource set used for channel measurements on a case-by-case basis. The minimum processing delay (Z, Z') can then be determined using (xKZm, xKZm'), where x can be predefined or reported by the UE capability. Network entity 104 and / or UE 102 can determine the value of (Zm, Zm') based on the minimum processing delay for a CSI measurement. In one example, (Zm, Zm') is based on (Z1, Z1'), (Z2, Z2'), or (Z3, Z3') as defined in Section 5.4 of 3GPP TS 38.214. In another example, (Zm, Zm') is predefined or reported by the UE capability.

[0069] In some aspects, UE 102 measures the beam quality of all configured CSI-RS resources in the CSI-RS resource set used for channel measurements one by one, and the CSI of the first N CSI-RS resources has the best beam quality. Therefore, the minimum processing delay (Z, Z') can be determined by (xNZm+yKZn, xNZm'+yKZn'), where y can be predefined or reported by the UE capability. In one example, (Zn, Zn') is based on (Z1, Z1'), (Z2, Z2'), or (Z3, Z3') as defined in Section 5.4 of 3GPP TS 38.214. In another example, (Zn, Zn') is predefined or reported by the UE capability. In yet another example, (Zn, Zn') is predefined as 0.

[0070] In some respects, UE 102 performs parallel computation of the CSI of some or all of the configured CSI-RS resources in the CSI-RS resource set used for channel measurements. Then, the minimum processing delay (Z, Z') can be determined by (xZm, xZm').

[0071] In some respects, network entity 104 and / or UE 102 may determine the number of CPUs for a CSI report that includes multiple CSIs based on at least one of the following factors: the number of CSI-RS resources used for channel measurements (K); the number of reported CSIs (N); the frequency granularity of the CSI report; and the UE's capacity for the number of CPUs. In some respects, UE 102 calculates the CSIs one by one. Thus, the number of CPUs is 1.

[0072] In some respects, UE 102 performs parallel computation of some or all of the configured CSI-RS resources used for channel measurements. Thus, the number of CPUs is x'k, where x' is reported by the UE capability or predefined (e.g., x'=1, or configured by the network entity).

[0073] In some respects, UE 102 computes some or all of the CSIs for channel measurements using CSI-RS resources in parallel. UE 102 may use additional CPUs to select CSI-RS resources for CSI reporting. Thus, the number of CPUs is x'N+y'K, where y' is reported by the UE capability or predefined (e.g., y'=1 or y'=0, or configured by the network entity). In some respects, the total number of CPUs does not exceed the maximum number of CPUs (e.g., 8).

[0074] In some aspects, network entity 104 may pair UE 102 with another UE 312 for transmitting downlink communication (e.g., PUSCH communication). For example, network entity 104 may receive a second CSI report including multiple second CSIs from the other UE. Network entity 104 may pair UE 102 with the second UE 312 based on the CSI report received from UE 102 and the second CSI report received from the other UE. After pairing UE 102 with the second UE 312, network entity 104 may use a first beam to transmit first downlink communication (e.g., PUSCH communication) to UE 102 and a second beam to transmit second downlink communication (e.g., PUSCH communication) to the second UE.

[0075] Figure 4AIllustration 400a shows a CSI report 411 based on multiple reported CSIs 413 according to an embodiment. In some aspects, the network entity configures K CSI-RS resources (e.g., four CSI-RS resources 405a, 405b, 405c, and 405d) in a CSI-RS resource set 403 for channel measurements. The UE reports K CSIs (e.g., four CSIs 413a, 413b, 413c, and 413d), wherein each reported CSI 413a, 413b, 413c, and 413d corresponds to each CSI-RS resource 405a, 405b, 405c, and 405d in the CSI-RS resource set 403 for channel measurements, respectively. If a network entity configures multiple CSI-RS resource sets 403, where each CSI-RS resource set s includes Ks CSI-RS resources, then when CSI-RS resource set j is triggered for CSI reporting 411 (e.g., via DCI), the UE reports Kj CSIs 413. In some aspects, the UE may not report CRIs in CSI reporting 411. In some aspects, the network entity may configure parameters to enable multiple CSI reporting in the CSI reporting configuration for CSI reporting 411. In some aspects, the network entity may configure the UE to report one or more of the following CSI components via the reporting amount in the CSI reporting configuration for CSI reporting 411: RI, CQI, PMI, wideband precoder information, and / or stratum indicator (LI). Therefore, if the UE receives a configuration to report CRIs, the UE may report a CSI based on one of the CSI-RS resources used for channel measurements. Otherwise, the UE can report the CSI of all CSI-RS resources in the CSI-RS resource set used for channel measurements.

[0076] Figure 4B Illustration 400b shows a CSI report 411 based on multiple reported CSI 413s according to another embodiment. In some aspects, the network entity configures K CSI-RS resources 405 (e.g., four CSI-RS resources 405a, 405b, 405c, and 405d) in a CSI-RS resource set 403 for channel measurements. The network entity configures the UE to report N (N<=K) CSI 413s from CSI-RS resources 405. The number of reported CSI 413s can be configured by the network entity via RRC signaling, MAC CE, or DCI. In some aspects, the network entity configures the CSI report 411 using parameters (e.g., ...) CSI-ReportConfigThe number of reported CSI 413s can be configured using MAC CE. In some aspects, network entities configure the number of reported CSI 413s by activating semi-persistent CSI reporting via MAC CE. In other aspects, network entities configure the number of reported CSI 413s by triggering aperiodic CSI reporting via DCI.

[0077] In some respects, the UE reports N CSIs 413, where each reported CSI 413 corresponds to a CSI-RS resource 405 in the CSI-RS resource set 403 used for channel measurements. For example, in Figure 4B In a non-limiting example, the UE reports CSI 413a corresponding to CSI-RS resource 405a and CSI 413c corresponding to CSI-RS resource 405c. In some aspects, the UE reports N CRIs indicating the CSI-RS resource index for the reported CSI 413. In some aspects, the UE reports a CRI bitmap, where bit x indicates whether CSI 413 corresponding to CSI-RS resource x 405 of CSI-RS resource set 403 has been reported. For example, as... Figure 4B As shown, CRI bitmap 1010 (CRI = 1010) indicates that the UE should report the first and third CSIs, respectively, for CSI 413a and CSI 413c. The UE can select which CSI 413 to report based on the measured beam quality for each CSI-RS resource 405.

[0078] Figure 4C Illustration 400c shows a CSI report 411 based on multiple reported CSIs 413 according to another embodiment. In some aspects, network entities can configure CRI restrictions on the CSI report 411 via RRC signaling, MAC CE, or DCI. In one example, the CRI restriction indicates at least one CRI included by the UE in the CSI report 411. For example, as... Figure 4C As shown, network entities always require the UE to report CSI 413a of CSI-RS resource 405a. In another example, CRI restrictions indicate candidate CRI combinations, and the UE reports CRIs based on one of the configured candidate CRI combinations. In some aspects, the UE reports a CRI bitmap, where bit x indicates whether a CSI corresponding to CSI-RS resource x of CSI-RS resource set 403 has been reported. For example, as... Figure 4C As shown, CRI bit Figure 1The xxx instruction indicates that the UE always reports the first CSI 413a, and optionally reports CSI 413b, 413c, or 413d based on the status of the second, third, and fourth bits of the CRI bitmap. Here, CRI bitmap 1001 indicates that the first CSI and the fourth CSI, respectively, are reported as CSI 413a and CSI 413d.

[0079] Figure 4D A diagram 400d illustrates a CSI report 411 based on multiple reported CSIs 413 according to another embodiment. In some aspects, the network entity configures K CSI-RS resources 405 (e.g., four CSI-RS resources 405a, 405b, 405c, and 405d) in a CSI-RS resource set 403 for channel measurements. The network entity configures the UE to report N (N<=K) CSIs 413 from the CSI-RS resources 405. The UE may report the value of N in the CSI report 411. In some aspects, the UE may report the value of N in CSI section 1.

[0080] In one example, the UE reports the value of N based on a dedicated component in CSI report 411. In another example, the UE reports the value of N based on the reported CRI. The UE reports a CRI bitmap, where bit x indicates whether CSI 413 corresponding to CSI-RS resource x 405 of CSI-RS resource set 403 is reported. Here, CSI report 411 indicates that the CRI bitmap = 1010 indicates that the two reported CSIs (CSI = 2) and / or indicates that CSI 413a corresponding to CSI resource 405a and CSI 413c corresponding to CSI resource 405c are reported.

[0081] In some aspects, network entities can configure a minimum and / or a maximum number of reported CSI 413 for CSI reports 411. This configuration can be provided by the network entity via RRC signaling, MAC CE, or DCI. In some aspects, network entities can configure CRI limits for CSI reports 411. In one example, the CRI limit indicates at least one CRI that the UE should report. For example, the network entity can always require the UE to report CSI 413a of CSI-RS resource 405a. In another example, the CRI limit indicates candidate CRI combinations, and the UE reports CRIs based on one of the configured candidate CRI combinations.

[0082] Figure 4EA diagram 400e illustrates a CSI report 411 based on multiple reported CSIs 413 according to another embodiment. In some aspects, the network entity configures K CSI-RS resources 405 (e.g., four CSI-RS resources 405a, 405b, 405c, and 405d) in a CSI-RS resource set 403 for channel measurements. The network entity configures the UE to report L (L<=K) CSIs 413 from the CSI-RS resources 405 in each CSI reporting time 411. The UE can report different CSIs 413 in different reporting times 411. For example, as Figure 4E As shown, the UE can report CSI 413a and CSI 413b in CSI reporting time 411a. The UE can report CSI 413c and CSI 413d in CSI reporting time 411b. The value of L can be predefined or configured by the network entity. The reported CSI 413 for each CSI reporting time 411 can be configured by the network entity or determined based on the timing information of the CSI reporting time 411 (e.g., symbol / slot / subframe / frame / time index) and / or the CSI-RS resource 405 index.

[0083] Figure 2A , Figure 2B , Figure 3 and Figures 4A to 4E Multi-CSI feedback for MU-MIMO pairing is shown. Figure 5 and Figure 6 The following diagram illustrates the implementation. Figure 2A , Figure 2B , Figure 3 and Figures 4A to 4E One or more aspects of the method. In particular, Figure 5 The diagram shows the pair of UE 102. Figure 2A , Figure 2B , Figure 3 and Figures 4A to 4E The implementation of one or more aspects. Figure 6 This shows the network entity 104 pairs Figure 2A , Figure 2B , Figure 3 and Figures 4A to 4E The implementation of one or more aspects.

[0084] Figure 5 A flowchart 500 illustrates a method for wireless communication at the UE. (Reference) Figure 1 , Figure 2A , Figure 2B , Figure 3 and Figures 4A to 4EThis method can be performed by UE 102. In an embodiment, UE 102 may optionally transmit 502 to the network entity UE capabilities regarding supported configurations for CSI reports including multiple CSIs. For example, refer to Figure 3 UE 102 may optionally transmit 302 to network entity 104 about the UE's capabilities for supporting configurations of CSI reports that include multiple CSIs.

[0085] The UE receives a 504 control signaling message from the network entity. This control signaling message configuration includes the following CSI reporting configuration: multiple CSI-RS resources for channel measurements, codebook configuration, and parameters instructing the UE to report multiple CSIs. For example, refer to... Figure 3 UE102 receives 304 control signaling, which configures the following CSI report configuration: multiple CSI-RS resources for channel measurement, at least one codebook configuration, and parameters for configuring CSI reports that include multiple CSIs.

[0086] The UE may optionally receive control signaling from the network entity for 506 triggering CSI reporting and multiple CSI-RS resources for channel measurements. For example, refer to Figure 3 UE 102 may optionally receive from network entity 104 306 triggering configured CSI reports and / or MAC CE or DCI for multiple CSI-RS resources used for channel measurements.

[0087] The UE receives more than 508 CSI-RS from network entities on multiple CSI-RS resources. For example, refer to Figure 3 UE 102 receives 308 CSI-RS from network entities on multiple CSI-RS resources.

[0088] The UE transmits 510 to the network entity a CSI report comprising multiple CSIs measured from multiple CSI-RS based on CSI report configuration. For example, refer to Figure 3 UE 102 transmits 310 to network entity 104 a CSI report including multiple CSIs measured from multiple CSI-RS based on CSI report configuration. Figure 5 The method described is performed from the UE side of the wireless communication link, while Figure 6 A method is described from the network side of the wireless communication link.

[0089] Figure 6 This is flowchart 600, which describes a method for wireless communication at a network entity. (Reference) Figure 1 , Figure 2A , Figure 2B , Figure 3 and Figures 4A to 4EThis method can be performed by one or more network entities 104, which may correspond to a base station or a unit of a base station, such as RU 106, DU 108, and / or CU 110. In an embodiment, the network entity may optionally receive from the UE 602 UE capabilities regarding supported configurations for CSI reports including multiple CSIs. For example, refer to... Figure 3 Network entity 104 may optionally receive from UE 102 302 information about the UE's capabilities for supporting configurations of CSI reports that include multiple CSIs.

[0090] The network entity transmits 604 control signaling to the UE. This control signaling configuration includes the following CSI reporting configuration: multiple CSI-RS resources for channel measurements, codebook configuration, and parameters instructing the UE to report multiple CSIs. For example, refer to... Figure 3 Network entity 104 transmits 304 control signaling to UE 102. The control signaling configuration includes the following CSI report configuration: multiple CSI-RS resources for channel measurement, at least one codebook configuration, and parameters for configuring CSI reports including multiple CSIs.

[0091] The network entity may optionally transmit to the UE control signaling for triggering CSI reporting and multiple CSI-RS resources for channel measurements. For example, refer to Figure 3 Network entity 104 may optionally transmit 306 to UE 102 to trigger the configured CSI report and / or MAC CE or DCI of multiple CSI-RS resources for channel measurement.

[0092] The network entity transmits over 608 CSI-RS to the UE on multiple CSI-RS resources. For example, refer to Figure 3 Network entity 104 transmits 308 CSI-RS to UE 102 on multiple CSI-RS resources.

[0093] The network entity receives a CSI report from the UE, comprising multiple CSIs measured from multiple CSI-RS based on a CSI report configuration. For example, refer to... Figure 3 The network entity receives 310 CSI reports from UE 102, which include multiple CSIs measured from multiple CSI-RS based on CSI report configuration.

[0094] Network entities may optionally pair UE 102 with another UE 612 for downlink communication based on CSI reports. For example, refer to Figure 3 Network entity 104 may optionally pair UE 102 with another UE 312 based on CSI reports for the transmission of downlink communication. For example... Figure 7 The UE device 702 described herein can execute the method of flowchart 500. For example... Figure 8 One or more network entities 104 described herein may execute the method of flowchart 600.

[0095] Figure 7 Illustration 700 illustrates an example of a hardware implementation of UE device 702. UE device 702 may be UE 102, a component of UE 102, or may implement UE functionality. UE device 702 may include an application processor 706, which may have on-chip memory 706'. In the example, application processor 706 may be coupled to a secure digital (SD) card 708 and / or a display 710. Application processor 706 may also be coupled to a sensor module 712, a power supply 714, an additional memory module 716, a camera 718, and / or other related components.

[0096] The UE device 702 may further include a wireless baseband processor 726, which may be referred to as a modem. The wireless baseband processor 726 may have on-chip memory 726'. Together with and similar to the application processor 706, the wireless baseband processor 726 may also be coupled to a sensor module 712, a power supply 714, an additional memory module 716, a camera 718, and / or other related components. The wireless baseband processor 726 may additionally be coupled to one or more Subscriber Identity Module (SIM) cards 720 and / or one or more transceivers 730 (e.g., wireless RF transceivers).

[0097] Within one or more transceivers 730, the UE device 702 may include a Bluetooth module 732, a WLAN module 734, an SPS module 736 (e.g., a GNSS module), and / or a cellular module 738. The Bluetooth module 732, WLAN module 734, SPS module 736, and cellular module 738 may each include an on-chip transceiver (TRX), or in some cases, only a transmitter (TX) or only a receiver (RX). The Bluetooth module 732, WLAN module 734, SPS module 736, and cellular module 738 may each include a dedicated antenna and / or utilize antenna 740 to communicate with one or more other nodes. For example, the UE device 702 may communicate with another UE (e.g., sidelink communication) and / or with network entity 104 (e.g., uplink / downlink communication) via antenna 740 through transceiver 730, where network entity 104 may correspond to a base station or base station unit (such as RU 106, DU 108, or CU 110).

[0098] The wireless baseband processor 726 and application processor 706 may each include computer-readable media / memory 726', 706' respectively. An additional memory module 716 may also be considered a computer-readable media / memory. Each computer-readable media / memory 726', 706', 716 may be non-transitory. The wireless baseband processor 726 and application processor 706 may each be responsible for general processing, including executing software stored on the computer-readable media / memory 726', 706', 716. When executed by the wireless baseband processor 726 / application processor 706, this software causes the wireless baseband processor 726 / application processor 706 to perform the various functions described herein. The computer-readable media / memory may also be used to store data manipulated by the wireless baseband processor 726 / application processor 706 during software execution. The wireless baseband processor 726 / application processor 706 may be a component of UE 102. UE device 702 may be a processor chip (e.g., a modem and / or an application) and includes only a wireless baseband processor 726 and / or an application processor 706. In other examples, UE device 702 may be the entire UE 102 and may include additional modules for device 702.

[0099] As in Figure 1 The discussion and about Figure 5 The implemented multi-CSI component 140 is configured to receive from a network entity a CSI report configuration indicating the following: multiple CSI-RS resources for channel measurements, a codebook configuration, and report parameters that enable the CSI report to include multiple CSIs. The multi-CSI component 140 is further configured to receive multiple CSI-RSs from the network entity on the multiple CSI-RS resources. The multi-CSI component 140 is further configured to transmit to the network entity a CSI report including multiple CSIs measured from the multiple CSI-RSs based on the CSI report configuration.

[0100] The multiple CSI component 140 may be located within the application processor 706 (e.g., at 140a), within the wireless baseband processor 726 (e.g., at 140b), or within both the application processor 706 and the wireless baseband processor 726. The multiple CSI components 140a to 140b may be one or more hardware components specifically configured to implement the stated process / algorithm, implemented by one or more processors configured to execute the stated process / algorithm, stored in a computer-readable medium for implementation by one or more processors, or a combination thereof.

[0101] Figure 8This is a diagram 800 illustrating an example of a hardware implementation of one or more network entities 104. The one or more network entities 104 may be a base station, a component of a base station, or may implement base station functionality. The one or more network entities 104 may include or correspond to at least one of RU 106, DU 108, or CU 110. CU 110 may include a CU processor 846, which may have on-chip memory 846'. In some aspects, CU 110 may further include an additional memory module 856 and / or a communication interface 848, both of which may be coupled to the CU processor 846. CU 110 may communicate with DU 108 via a midhaul link 162 (such as an F1 interface between the communication interface 848 of CU 110 and the communication interface 828 of DU 108).

[0102] DU 108 may include a DU processor 826, which may have on-chip memory 826'. In some aspects, DU 108 may further include an additional memory module 836 and / or a communication interface 828, both of which may be coupled to the DU processor 826. DU 108 may communicate with RU 106 via a frontlink 160 between DU 108's communication interface 828 and RU 106's communication interface 808.

[0103] RU 106 may include an RU processor 806, which may have on-chip memory 806'. In some aspects, RU 106 may further include an additional memory module 816, a communication interface 808, and one or more transceivers 830, all of which may be coupled to the RU processor 806. RU 106 may further include an antenna 840, which may be coupled to one or more transceivers 830, such that RU 106 can communicate with UE 102 via antenna 840 through one or more transceivers 830.

[0104] On-chip memories 806', 826', 846' and additional memory modules 816, 836, 856 can each be considered as computer-readable media / memory. Each computer-readable medium / memory can be non-transitory. Each of processors 806, 826, 846 is responsible for general processing, including executing software stored on the computer-readable medium / memory. When executed by the corresponding processor 806, 826, 846, the software causes the processor 806, 826, 846 to perform the various functions described herein. The computer-readable medium / memory can also be used to store data manipulated by the processors 806, 826, 846 during software execution. In the example, the multi-CSI configuration component 150 may be located at any of one or more network entities 104, such as at CU110; at both CU110 and DU108; at each of CU110, DU108 and RU106; at DU108; at both DU108 and RU106; or at RU106.

[0105] As in Figure 1 The discussion and about Figure 6 The implemented multi-CSI configuration component 150 is configured to transmit to the UE a CSI report configuration indicating the following: multiple CSI-RS resources for channel measurements, a codebook configuration, and report parameters that enable the CSI report to include multiple CSIs. The multi-CSI configuration component 150 is further configured to transmit multiple CSI-RSs to the UE on the multiple CSI-RS resources. The multi-CSI configuration component 150 is further configured to receive from the UE a CSI report including multiple CSIs measured from the multiple CSI-RSs based on the CSI report configuration.

[0106] The multi-CSI configuration component 150 may reside within one or more processors of one or more network entities 104, such as within an RU processor 806 (e.g., at 150a), a DU processor 826 (e.g., at 150b), and / or a CU processor 846 (e.g., at 150c). The multi-CSI configuration components 150a to 150c may be one or more hardware components specifically configured to implement the stated process / algorithm, implemented by one or more processors 806, 826, 846 configured to execute the stated process / algorithm, stored in a computer-readable medium for implementation by one or more processors 806, 826, 846, or a combination thereof.

[0107] The specific order or hierarchy of the boxes in the processes and flowcharts disclosed herein is illustrative of the exemplary methods. Therefore, the specific order or hierarchy of the boxes in the processes and flowcharts can be rearranged. Some boxes may also be merged or deleted. Dashed lines may indicate optional elements in the illustrations. The appended method claims present the elements of each box in the exemplary order and are not limited to the specific order or hierarchy presented in the claims, processes, and flowcharts.

[0108] The detailed descriptions presented herein, in conjunction with accompanying drawings, depict various configurations, but do not represent the only configurations in which the concepts described herein can be practiced. These detailed descriptions include specific details used to provide a comprehensive explanation of the various concepts. However, these concepts can be practiced without using these specific details. In some cases, well-known structures and components are shown in block diagram form to avoid obscuring such concepts.

[0109] Various aspects of wireless communication systems (such as telecommunications systems) are presented with reference to various devices and methods. These devices and methods are described in the following detailed description and are shown in the accompanying drawings by various boxes, components, circuits, processes, call flows, systems, algorithms, etc. (collectively, "elements"). These elements can be implemented using electronic hardware, computer software, or a combination thereof. Whether such elements are implemented as hardware or software depends on the specific application and design constraints imposed on the system as a whole.

[0110] An element, or any part of an element, or any combination of elements, can be implemented as a “processing system” including one or more processors. Examples of processors include microprocessors, microcontrollers, graphics processing units (GPUs), central processing units (CPUs), application processors, digital signal processors (DSPs), reduced instruction set computing (RISC) processors, system-on-a-chip (SoCs), baseband processors, field-programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gated logic, discrete hardware circuits, and other similar hardware configured to perform the various functionalities described throughout this disclosure. One or more processors in a processing system can execute software, which may be referred to as software, firmware, middleware, microcode, hardware description languages, or others. Software should be interpreted broadly as instructions, instruction sets, code, code segments, program code, programs, subroutines, software components, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, or any combination thereof.

[0111] If the functionality described herein is implemented in software, then such functionality may be stored on or encoded as one or more instructions or code on a computer-readable medium, such as a non-transitory computer-readable storage medium. Computer-readable media include computer storage media and may include random access memory (RAM), read-only memory (ROM), electrically erasable programmable ROM (EEPROM), optical disk storage, magnetic disk storage, other magnetic storage devices, combinations of these types of computer-readable media, or any other medium that can be used to store computer-executable code in the form of instructions or data structures accessible by a computer. The storage medium can be any available medium accessible to a computer.

[0112] The aspects, implementations, and / or use cases described herein can be implemented across many different platform types, devices, systems, form factors, sizes, and package arrangements. For example, aspects, implementations, and / or use cases can be generated via integrated chip implementations and other devices based on non-modular components, such as end-user devices, vehicles, communication devices, computing devices, industrial equipment, retail / procurement devices, medical devices, devices supporting artificial intelligence (AI), devices supporting machine learning (ML), etc. The scope of aspects, implementations, and / or use cases can range from chip-level or modular components to non-modular or non-chip-level implementations, and further to aggregated, distributed, or original equipment manufacturer (OEM) devices or systems incorporating one or more of the technologies described herein.

[0113] Apparatus incorporating the aspects and features described herein may also include additional components and features for implementing and practicing the claimed and described aspects and features. For example, the transmission and reception of wireless signals necessarily include numerous components for analog and digital purposes, such as hardware components, antennas, RF chains, power amplifiers, modulators, buffers, processors, interleavers, adders / summers, etc. The techniques described herein can be practiced in a wide variety of devices, chip-level components, systems, distributed arrangements, aggregated or decomposed components, end-user devices, etc., in various configurations.

[0114] The description herein is provided to enable those skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects. Therefore, the claims are not limited to the aspects described herein, but should be interpreted in light of the full scope of this disclosure consistent with the language of the claims.

[0115] Unless explicitly stated otherwise, references to singular elements do not imply "one and only one," but rather "one or more." Terms such as "if," "when," and "at" do not imply an immediate temporal relationship or response. That is, phrases such as "when" do not imply an immediate action in response to or during the occurrence of an action, but simply that an action will occur if the condition is met, without requiring a specific or immediate temporal constraint on the occurrence of the action. The terms "may," "may," and "can" as used herein generally carry certain connotations. For example, "may" refers to a permissible feature that may or may not occur, "may" refers to a feature that is very likely to occur, and "can" refers to a capability (e.g., being able to). The phrase "for example" generally carries a similar connotation to "may," and therefore, "may" is sometimes excluded from sentences that include "for example" or other similar phrases.

[0116] Unless otherwise expressly stated, the term "some" means one or more. Combinations such as "at least one of A, B, or C" or "one or more of A, B, or C" include any combination of A, B, and / or C, such as A and B, A and C, B and C, or A and B and C, and may include multiple A, multiple B, and / or multiple C, or may include only A, only B, or only C. A set should be interpreted as a set of elements having a number of one or more elements. Terms or articles such as "a," "an," and / or "the" may refer to one of the items, features, elements, etc., following that term or article, or may refer to more than one of the items, features, elements, etc., following that term or article. For example, the expression "a small component" does not exclude references to multiples of said component, because "multiple components" necessarily includes "a small component." Therefore, the expression "a small component" can be interpreted as "at least one component," or similarly, as "one or more components."

[0117] Unless otherwise explicitly indicated, ordinal terms such as “first” and “second” do not necessarily imply order in time, sequence, numerical value, etc., but are used to distinguish different instances of the term or phrase that follows each ordinal term.

[0118] As used in the specification and drawings, reference numerals are sometimes cross-referenced across drawings to indicate the same or similar features. Features that are identical in multiple drawings may be labeled with the same reference numerals in multiple drawings. Features that are similar but not identical across multiple drawings may be labeled with reference numerals that have different leading numerals but share one or more of the same trailing numerals (e.g., 206, 306, 406, etc. may refer to similar features in the drawings). Therefore, the same numerals may refer to the same action.

[0119] Structural and functional equivalents of elements of all aspects described throughout this disclosure, known or subsequently learned by those skilled in the art, are expressly incorporated herein by reference and are covered by the claims. The terms “module,” “mechanism,” “element,” “device,” etc., may not be substitutes for the term “component.” Therefore, no claim element shall be construed as means plus function unless explicitly stated using the phrase “component for…”. As used herein, the phrase “based on” should not be construed as a reference to a closed set of information, one or more conditions, one or more factors, etc. In other words, unless expressly stated otherwise, the phrase “based on A” (where “A” can be information, conditions, factors, etc.) shall be construed as “at least based on A”.

[0120] The following examples are illustrative only and may be combined with other examples or teachings described herein without limitation.

[0121] Example 1 is a method for wireless communication at a UE, comprising: receiving from a network entity a CSI report configuration indicating the following: a plurality of CSI-RS resources for channel measurement; a codebook configuration; and report parameters that cause the CSI report to include a plurality of CSIs; receiving a plurality of CSI-RSs from the network entity on the plurality of CSI-RS resources for channel measurement; and transmitting to the network entity the CSI report including the plurality of CSIs measured from the plurality of CSI-RSs based on the CSI report configuration.

[0122] Example 2 can be combined with Example 1 and includes: the CSI report configuration further indicating at least one of the following: a second plurality of CSI-RS resources for interference measurement; a plurality of CSI-IM resources for interference measurement; the frequency granularity of the CSI report; a codebook subset restriction; or a rank restriction.

[0123] Example 3 may be combined with any of Examples 1 to 2, and further includes transmitting a UE capability message to the network entity, the UE capability message indicating at least one of the following: whether the UE supports the CSI report including the plurality of CSIs; the maximum number of the plurality of CSIs; the maximum number of the plurality of CSI-RS resources for channel measurement; the maximum number of antenna ports on the plurality of CSI-RS resources for channel measurement; the supported time-domain behavior of the plurality of CSI-RS resources for channel measurement; the supported time-domain behavior for the CSI report; or the supported codebook type for the CSI report having the plurality of CSIs.

[0124] Example 4 may be combined with any of Examples 1 to 3, and further includes: the CSI report configuration further indicates the same value of at least one of the following for each of the plurality of CSI-RS resources used for channel measurements: bandwidth; subcarrier; time-domain behavior; periodicity; number of antenna ports; EPRE ratio between PDSCH and CSI-RS; EPRE ratio between CSI-RS and auxiliary synchronization signal; or scrambling identifier.

[0125] Example 5 may be combined with any of Examples 1 to 4, and further includes: the CSI reporting configuration further instructs at least one of the following for each of the plurality of CSI-RS resources used for channel measurements: codebook configuration; codebook subset restriction; rank indicator (RI) restriction; or reporting quantity configuration.

[0126] Example 6 may be combined with any of Examples 1 to 5, and further includes: each of the plurality of CSIs corresponds to one of the plurality of CSI-RS resources used for channel measurement.

[0127] Example 7 can be combined with any of Examples 1 to 6, and further includes: the CSI report configuration further indicating the configuration of CRI restrictions on the CSI report.

[0128] Example 8 may be combined with any of Examples 1 to 7, and further includes: transmitting the CSI report to the network entity includes transmitting the CSI report to the network entity for each of the plurality of CSIs including at least one of the following: CRI; RI; PMI; CQI; LI; wideband precoder information.

[0129] Example 9 may be combined with any of Examples 1 to 8, and further includes: transmitting the CSI report to the network entity comprising transmitting the CSI report including the plurality of CSIs to the network entity based on at least one transmission timing of receiving each of the plurality of CSI-RS resources for channel measurement within a time window.

[0130] Example 10 may be combined with any of Examples 1 to 9, and further includes: the minimum processing delay for the CSI report is based on at least one of: the number of the plurality of CSI-RS resources for channel measurement; the codebook configuration of each of the plurality of CSI-RS resources for channel measurement; the number of reported CSIs; the frequency granularity of the CSI report; or the UE capability for the minimum processing delay.

[0131] Example 11 may be combined with any of Examples 1 to 10, and further includes: receiving control signaling from the network entity to trigger the CSI report and the plurality of CSI-RS resources for channel measurement.

[0132] Example 12 is a method for wireless communication at a network entity, and includes: transmitting to a first UE a CSI report configuration indicating the following: a plurality of CSI-RS resources for channel measurement; a codebook configuration; and report parameters that cause a first CSI report to include a plurality of CSIs; transmitting a plurality of CSI-RSs to the first UE on the plurality of CSI-RS resources for channel measurement; and receiving from the first UE a first CSI report including the plurality of CSIs measured from the plurality of CSI-RSs based on the CSI report configuration.

[0133] Example 13 can be combined with Example 12 and further includes: receiving a second CSI report from a second UE including a plurality of second CSIs; pairing the first UE with the second UE based on the first CSI report and the second CSI report; transmitting a first downlink communication to the first UE using a first beam; and transmitting a second downlink communication to the second UE using a second beam.

[0134] Example 14 may be combined with any of Examples 12 to 13, and further includes: transmitting the plurality of CSI-RS includes: using a first spatial domain filter to transmit a first CSI-RS to the first UE; and using a second spatial domain filter different from the first spatial domain filter to transmit a second CSI-RS to the first UE.

[0135] Example 15 may be combined with any of Examples 12 to 14, and further includes: the CSI report configuration further includes a second plurality of CSI-RS resources for interference measurement, a plurality of CSI-IM resources for interference measurement, at least one frequency granularity of the CSI report, at least one codebook subset restriction, or at least one rank restriction.

[0136] Example 16 may be combined with any of Examples 12 to 15, and further includes: receiving from the UE a UE capability message indicating at least one of the following: whether the UE supports the CSI report including the plurality of CSIs; the maximum number of the plurality of CSIs; the maximum number of the plurality of CSI-RS resources for channel measurement; the maximum number of antenna ports on the plurality of CSI-RS resources for channel measurement; the supported time-domain behavior of the plurality of CSI-RS resources for channel measurement; the supported time-domain behavior for the CSI report; or the supported codebook type for the CSI report having the plurality of CSIs.

[0137] Example 17 may be combined with any of Examples 12 to 16, and further includes: the CSI report configuration includes: for each CSI-RS in the CSI-RS resource set of the plurality of CSI-RS resources used for channel measurements, configuring the same value for at least one of the following: bandwidth; subcarrier; time-domain behavior; periodicity; number of antenna ports; EPRE ratio between the physical downlink shared channel (PDSCH) and the CSI-RS; EPRE ratio between the CSI-RS and the auxiliary synchronization signal; or scrambling identifier.

[0138] Example 18 may be combined with any of Examples 12 to 17, and further includes: the CSI reporting configuration indicating at least one of the following: the codebook configuration; codebook subset restriction; RI restriction; or reporting quantity configuration; wherein each of the plurality of configurations corresponds to one of the plurality of CSI-RS resources for channel measurement, and wherein the plurality of configurations have the same value.

[0139] Example 19 may be combined with any of Examples 12 to 18, and further includes that the number of the plurality of CSIs is based on the number of the plurality of CSI-RS resources used for channel measurement, or is configured by the network entity.

[0140] Example 20 can be combined with any of Examples 12 to 19, and further includes: the CSI report configuration further includes the configuration of CRI restrictions on the CSI report.

[0141] Example 21 may be combined with any of Examples 12 to 20, and further includes: receiving the CSI report from the UE includes: receiving from the UE the CSI report for each of the plurality of CSIs including at least one of the following: CRI; RI; PMI; CQI; LI; wideband precoder information.

[0142] Example 22 may be combined with any of Examples 12 to 21, and further includes: receiving the CSI report from the UE includes: receiving the CSI report including the plurality of CSIs from the UE based on at least one transmission timing of receiving each of the plurality of CSI-RS resources for channel measurement within a time window.

[0143] Example 23 may be combined with any of Examples 12 to 22, and further includes: the minimum processing delay for the CSI report is based on at least one of: the number of the plurality of CSI-RS resources for channel measurement; the codebook configuration of each of the plurality of CSI-RS resources for channel measurement; the number of reported CSIs; the frequency granularity of the CSI report; or the UE capability for the minimum processing delay.

[0144] Example 24 may be combined with any of Examples 12 to 23, and further includes: transmitting to the UE control signaling to trigger the CSI report and the plurality of CSI-RS resources for channel measurement.

[0145] Example 25 is a device for wireless communication used to implement the method described in any of Examples 1 through 24.

[0146] Example 26 is a device for wireless communication, including components for implementing the method described in any of Examples 1 to 24.

[0147] Example 27 is a non-transitory computer-readable medium storing computer-executable code that, when executed by a processor, causes the processor to perform the method described in any of Examples 1 to 24.

Claims

1. A method for wireless communication at a user equipment (UE) (102), comprising: The network entity (104) receives (304) an instruction indicating the following Channel State Information (CSI) report configuration: Multiple CSI reference signal CSI-RS resources used for channel measurements; Codebook configuration; and Enables CSI reports to include reporting parameters from multiple CSIs; Receive (308) multiple CSI-RS from the network entity (104) on the multiple CSI-RS resources used for channel measurement; as well as Transmit (310) to the network entity (104) the CSI report, which includes the CSIs measured from the plurality of CSI-RS based on the CSI report configuration.

2. The method of claim 1, wherein, The CSI report configuration further indicates at least one of the following: A second set of multiple CSI-RS resources for interference measurements; Multiple CSI interference measurement CSI-IM resources for interference measurement; The frequency granularity of the CSI report; Codebook subset limitation; or Rank restriction.

3. The method according to any one of claims 1 to 2, further comprising: Transmit (302) a UE capability message indicating at least one of the following to the network entity (104): Does the UE (102) support the CSI report that includes the multiple CSIs? The maximum number of the multiple CSIs; The maximum number of the plurality of CSI-RS resources used for channel measurements; The maximum number of antenna ports on the plurality of CSI-RS resources used for channel measurements; The supported time-domain behavior of the plurality of CSI-RS resources used for channel measurements; Supported temporal behaviors used in the CSI report; or Supported codebook types for CSI reports with the multiple CSIs.

4. The method of any one of claims 1 to 3, wherein, The CSI report configuration further indicates the same value of at least one of the following for each of the plurality of CSI-RS resources used for channel measurements: bandwidth; subcarrier; Temporal behavior; Periodicity; Number of antenna ports; Energy per resource element (EPRE) ratio between the Physical Downlink Shared Channel (PDSCH) and the CSI-RS; The EPRE ratio between the CSI-RS and the auxiliary synchronization signal; or Scrambling identifier.

5. The method according to any one of claims 1 to 4, wherein, The CSI report configuration further indicates at least one of the following for each of the plurality of CSI-RS resources used for channel measurements: Codebook configuration; Codebook subset restrictions; The rank indicator RI is limited; or Report volume configuration.

6. The method according to any one of claims 1 to 5, wherein, Each of the plurality of CSIs corresponds to one of the plurality of CSI-RS resources used for channel measurements.

7. The method according to any one of claims 1 to 6, wherein, The CSI report configuration further indicates the configuration of the CSI-RS resource indicator (CRI) restriction for the CSI report.

8. The method according to any one of claims 1 to 7, wherein, Transmitting (310) the CSI report to the network entity (104) includes transmitting (310) the CSI report to the network entity (104) for each of the plurality of CSIs, which includes at least one of the following: CRI; RI; Precoder Matrix Indicator (PMI); Channel Quality Indicator (CQI); Layer indicator LI; Broadband precoder information.

9. The method according to any one of claims 1 to 8, wherein, Transmitting (310) the CSI report to the network entity (104) includes transmitting (310) the CSI report comprising the plurality of CSIs to the network entity (104) based on at least one transmission timing of receiving (308) the CSI-RS resources for channel measurement within a time window.

10. The method according to any one of claims 1 to 9, wherein, The minimum processing delay for the CSI report is based on at least one of the following: The number of the plurality of CSI-RS resources used for channel measurements; Codebook configuration for each of the plurality of CSI-RS resources used for channel measurements; The number of reported CSIs; The frequency granularity of the CSI report; or UE capabilities for the minimum processing latency.

11. The method of any one of claims 1 to 10, further comprising: The network entity (104) receives (306) control signaling that triggers the CSI report and the plurality of CSI-RS resources for channel measurement.

12. A method for wireless communication at a network entity (104), comprising: Transmit (304) to the first user equipment (UE) (102) indicating the following channel state information (CSI) report configuration: Multiple CSI reference signal CSI-RS resources used for channel measurements; Codebook configuration; as well as The first CSI report includes multiple first CSI reporting parameters; Multiple CSI-RS are transmitted (308) to the first UE (102) on the multiple CSI-RS resources used for channel measurement; as well as Receive (310) a first CSI report from the first UE (102) including the first CSIs measured from the plurality of CSI-RS based on the CSI report configuration.

13. The method of claim 12, further comprising: Receive (310) a second CSI report including multiple second CSIs from the second UE (102); The first UE (102) is paired with the second UE (102) based on the first CSI report and the second CSI report (312); The first beam is used to transmit the first downlink communication to the first UE (102); and The second beam is used to transmit the second downlink communication to the second UE.

14. The method according to any one of claims 12 to 13, wherein, The transmission (308) of the plurality of CSI-RS includes: A first spatial domain filter is used to transmit (308) a first CSI-RS to the first UE (102), and a second spatial domain filter, different from the first spatial domain filter, is used to transmit a second CSI-RS to the first UE.

15. The method of any one of claims 12 to 14, further comprising: Transmit (306) control signaling to the UE (102) to trigger the CSI report including the plurality of CSIs.

16. An apparatus for wireless communication, the apparatus comprising a transceiver, a memory, and a processor, the processor being coupled to the memory and the transceiver, the apparatus being configured to implement the method as claimed in any one of claims 1 to 15.

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