Channel state information feedback with respect to multi-channel measurement resources or coherent joint transmissions

Abstract

Methods and systems are presented herein for wireless communication for channel state information (CSI) feedback with respect to multi-channel measurement resources (CMR) or coherent joint transmission (CJT). For example, a user equipment (UE) transmits to a network entity an indication of the ability to report CSI reports based on signals of multiple CMRs or multiple transmission / reception points (TRPs). The UE receives a configuration message that configures a CSI report. The UE performs measurements of a plurality of CMRs and at least one interference measurement resource (IMR) as configured according to the configuration message. The UE transmits a CSI report to the network entity based on the performed measurements.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority to and benefits of International Application No. PCT / CN2022 / 112307, entitled “CHANNEL STATE INFORMATION FEEDBACK ON MULTIPLE CHANNEL MEASUREMENT RESOURCES OR COHERENT JOINT TRANSMISSION” and filed on August 12, 2022, under Article 8 of the Patent Cooperation Treaty (PCT), and the entire contents of which are expressly incorporated herein by reference. Technical Field

[0002] The present disclosure generally relates to channel state information (CSI) feedback. Background Art

[0003] The 3rd Generation Partnership Project (3GPP) is currently in the process of specifying a new radio interface called 5G New Radio (5G NR) and the Next Generation Packet Core Network (NG-CN or NGC). The 5G NR architecture will have three components: 5G Radio Access Network (5G-RAN), 5G Core Network (5GC), and User Equipment (UE). To facilitate the implementation of different data services and requirements, the 3GPP 5G NR cellular network supports network slicing, which enables virtualized and independent logical networks to be reused on the same physical network infrastructure.

[0004] Channel state information (CSI) can be obtained from measurements based on a single CSI-RS instance or an average of multiple CSI-RS instances. This type of CSI cannot reflect time domain variations for the channel. This type of CSI reporting mechanism may not be suitable for UEs with high / medium speeds, as a single CSI-RS instance may not provide enough information to establish the dynamic aspects of the channel conditions (e.g., UEs moving at 30 km / h or faster).

[0005] On the other hand, when multiple transmission / reception points (TRPs) are involved, configuring the CSI framework to support CSI reporting for coherent joint transmission (CJT) for multiple TRPs may face technical issues and challenges. Summary of the invention

[0006] The present disclosure provides methods and systems for wireless communication for channel state information (CSI) feedback for multi-channel measurement resources (CMR) or coherent joint transmission (CJT). Various aspects are presented herein, including a CSI framework for CSI reporting for CJT operation, and CSI processing unit (CPU) occupancy rules and minimum processing delay for CSI reporting for CJT operation.

[0007] In general terms, an example method of wireless communication by a user equipment (UE) device includes receiving a configuration message from a network entity to configure a channel state information (CSI) report based on multiple channel measurement resources (CMRs). The UE device performs measurements of multiple CMRs and at least one interference measurement resource (IMR) within a time slot or two consecutive time slots according to the configuration message. The UE device transmits a CSI report to the network entity based on the measurements of the multiple CMRs and at least one IMR.

[0008] In some implementations, the UE device transmits to the network entity an indication of an ability to report a CSI report based on a plurality of CMRs. In some implementations, the CSI report is based on at least one of: an occupancy rule for a CSI processing unit (CPU); or a processing delay for the CSI report. In some cases, the occupancy rule includes determining a number of CPUs based on a number of the plurality of CMRs. In some cases, the UE device transmits to the network entity a UE capability for a minimum processing delay for the CSI report.

[0009] In some implementations, the multiple CMRs include: multiple non-zero power (NZP) CSI reference signal (CSI-RS) resources, each of the multiple NZP CSI-RS resources corresponding to one of the multiple transmission / reception points (TRPs). In some cases, the UE device receives CSI-RS within the same resource block (RB) from the network entity. The UE device may receive a common codebook configuration for CSI reporting for each of the multiple TRPs from the network entity. In some cases, the multiple TRPs include at least one of the following: multiple TRPs configured by the network entity via high-layer signaling; or multiple TRPs selected by the UE device and reported in the CSI report. In some cases, the multiple TRPs selected by the UE device include multiple collaborative TRPs, and the configuration message further includes a maximum number of collaborative TRPs.

[0010] In some implementations, the UE device determines a configuration for the UE device based on a configuration message from a network entity, the configuration being used to include coherent joint transmission channel state information (CJT-CSI) in a CSI report, the CJT-CSI including CSI measurements of CMRs from multiple TRPs coherently combined at the UE device by joint antenna precoding at the multiple TRPs. The UE device receives multiple CMRs and at least one IMR from the multiple TRPs. The UE device measures the CJT-CSI based on the multiple CMRs and the at least one IMR. The UE device transmits a CSI report including one or more indexes corresponding to the multiple CMRs to the multiple TRPs. In some cases, the configuration message includes at least one of: a radio resource control (RRC) reconfiguration message; or a system information block (SIB).

[0011] In some implementations, the indication of the ability to report CSI reports includes at least one of: a maximum number of transmit / receive points (TRPs) supported by the UE device for CSI reporting for coherent joint transmit channel state information (CJT-CSI); a maximum number of CMRs for each configuration message for CJT-CSI; a maximum number of antenna ports for each CMR in multiple CMRs; a maximum number of total antenna ports across multiple CMRs for CSI reporting; a maximum number of CMRs across multiple configuration messages; a maximum number of multiple configuration messages; or a minimum processing delay for CSI reporting.

[0012] In some cases, the plurality of CMRs include at least one CMR group across a plurality of TRPs, the at least one CMR group being configured by a configuration message, and the CSI report includes an index identifying one of the at least one CMR groups. In some cases, the CSI report further includes a plurality of CSI-RS resource indicators (CRIs) and at least one of: a rank indicator (RI); a precoder matrix indicator (PMI); a channel quality indicator (CQI); or a layer indicator (LI).

[0013] In some cases, the UE device performs measurement by measuring CJT-CSI when a CSI processing unit (CPU) at the UE device is available to process multiple CMRs, and the CPU at the UE device is determined based on the total number of configured CMRs.

[0014] In some cases, the UE device runs multiple CPUs to perform multiple CJT-CST measurements in parallel for inclusion in the CSI report. The number of multiple CPUs determines the maximum number of CJT-CSI measurements that the UE device can perform in parallel. The at least one IMR includes one or more of a zero power IMR (ZP-IMR) and a non-zero power IMR (NZP-IMR), and the at least one IMR is associated with at least one CMR group.

[0015] In some cases, the UE device measures at least one IMR using multiple receive beams at the UE device; or measures at least one IMR across two or more CMRs in at least one CMR group.

[0016] In another general aspect, an example method of wireless communication by a network entity includes: receiving an indication of an ability to report a channel state information (CSI) report based on multiple channel measurement resources (CMRs) from a user equipment (UE) device. The network entity transmits a configuration message to the UE device that configures the CSI report based on the received indication. The network entity receives from the UE device a CSI report that includes measurements of a plurality of CMRs within a time slot or two consecutive time slots and at least one interference measurement resource (IMR) performed according to the configuration message.

[0017] In yet another general aspect, an example UE device or network entity includes one or more radio frequency (RF) modems, a processor coupled to the one or more RF modems; and at least one memory storing executable instructions. The executable instructions are configured to manipulate at least one of the processor or the one or more RF modems to perform the example methods described herein.

[0018] The details of the method (and related systems and techniques) are discussed in detail below. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The described embodiments and advantages of the embodiments may be best understood by referring to the following description taken in conjunction with the accompanying drawings, which in no way limit any changes in form and detail that may be made to the described embodiments by one skilled in the art without departing from the spirit and scope of the described embodiments.

[0020] Figure 1 is a block diagram depicting an example framework for channel state information (CSI) according to some embodiments;

[0021] Figure 2 is an example depicting CSI processing unit (CPU) occupancy rules for periodic or semi-persistent CSI reporting according to some embodiments;

[0022] Figure 3is an example depicting CSI processing unit (CPU) occupancy rules for aperiodic CSI reporting according to some embodiments;

[0023] Figure 4 An example mechanism for a single CSI report for multiple CSI measurements for high-speed or medium-speed UEs according to some embodiments is shown;

[0024] Figure 5 is a flow chart depicting a method of wireless communication by a user equipment (UE) device according to some embodiments;

[0025] Figure 6 An example call flow diagram is shown to support enhanced aperiodic CSI feedback for UE devices with high / medium speeds according to some embodiments;

[0026] Figure 7 An example scheme with time domain interpolation according to some embodiments is shown;

[0027] Figure 8 is a flow chart depicting a method of wireless communication by a user equipment (UE) device according to some embodiments;

[0028] Fig. 9 is a flow chart depicting a method of wireless communication by a network entity according to some embodiments;

[0029] Fig.10 An example call flow diagram is shown to support enhanced aperiodic and semi-persistent CSI feedback for UE devices with high or medium speeds according to some embodiments;

[0030] Fig.11 is an example depicting coherent joint transmission (CJT) according to some embodiments;

[0031] Fig.12 is a flow chart depicting a method of CJT CSI reporting by a user equipment (UE) device according to some embodiments;

[0032] Fig.13 shows an example call flow diagram for CJT CSI reporting according to some embodiments;

[0033] Fig.14 is a flow chart depicting a method of CJT CSI reporting by a user equipment (UE) device according to some embodiments;

[0034] Fig.15 is a flow chart depicting a method of CJT-CSI reporting by a network entity according to some embodiments;

[0035] Fig.16shows an example of a CMR / IMR configuration and associated CSI framework for CJT-CSI reporting according to some embodiments;

[0036] Fig.17 shows an example of a CMR / IMR configuration and associated CSI framework for CJT-CSI reporting according to some embodiments;

[0037] Fig.18 shows an example of a CMR / IMR configuration and associated CSI framework for CJT-CSI reporting according to some embodiments; and

[0038] Fig.19 An example for aperiodic CSI triggering state configuration according to some embodiments is shown. DETAILED DESCRIPTION

[0039] For ease of illustration, the following techniques are described in an example context in which one or more UE devices and a RAN implement one or more radio access technologies (RATs), including at least a fifth generation (5G) new radio (NR) standard (e.g., third generation partnership project (3GPP) release 15, 3GPP release 16, etc.) (hereinafter referred to as "5G NR" or "5G NR standard"). However, the present disclosure is not limited to networks configured with 5G NR RATs, but the techniques described herein can be applied to any combination of different RATs employed at UE devices and RANs. In addition, the present disclosure is not limited to the examples and scenarios described herein, but the techniques described herein can be applied to any network environment.

[0040] The present disclosure provides a method and system for wireless communication of channel state information (CSI) feedback about multiple channel measurement resources (CMR) or coherent joint transmission (CJT). For example, a user equipment (UE) transmits an indication of the ability to report CSI reports based on signals of multiple CMRs or multiple transmission / reception points (TRPs) to a network entity. Then, the UE receives a configuration message that configures the UE to determine the CSI report. The UE performs measurements of multiple CMRs and at least one interference measurement resource (IMR) within a time slot or two consecutive time slots as configured according to the configuration message. The UE transmits a CSI report including measurements performed on multiple CMRS and at least one IMR to the network entity.

[0041] Figure 1 is a block diagram depicting an example framework 100 for channel state information (CSI) according to some embodiments. For a multiple-input multiple-output (MIMO) system, channel state information (CSI) is key information for a gNB (which may be used interchangeably herein with a base station (BS), a network entity, etc.) to select a digital precoder for a UE.

[0042] Typically, the gNB may configure CSI reporting via RRC signaling CSI-ReportConfig 101, where a channel state information reference signal (CSI-RS) is used as a channel measurement resource (CMR) 103 for the UE to measure the downlink channel. At the same time, the gNB may configure some interference measurement resources (IMRs) for the UE to measure interference in CSI-ReportConfig 101. One CMR 103 (e.g., one resource configured in resourcesForChannelMeasurement) may be associated with one zero power IMR (ZP-IMR) 107 (e.g., one resource configured in csi-IM-ResourcesForInterference) and / or non-zero power IMR (NZP-IMR) 109 (e.g., one resource configured in nzp-CSI-RS-ResourcesForInterference). In an example, the NZP-IMR 109 may be used for intra-cell interference measurement, and the ZP-IMR 107 may be used for inter-cell interference measurement. For a UE with multi-beam operation, the UE may receive the CMR 103 and the associated IMRs 107 , 109 using the same beam.

[0043] With the associated CMR and IMR, the UE is able to identify the CSI, which may include a rank indicator (RI), a precoder matrix indicator (PMI), a channel quality indicator (CQI), and a layer indicator (LI). The RI and PMI are used to determine the digital precoder, the CQI is used to reflect the signal-to-interference-plus-noise (SINR) status to assist the gNB in ​​determining the modulation and coding scheme (MCS), and the LI is used to identify the strongest layer, which can facilitate the pairing of MU-MIMO with low-rank transmission and the precoder selection of the phase tracking reference signal (PT-RS). For CSI-ReportConfig 101 configured with more than one CMR 103, the UE may report a CSI-RS resource indicator (CRI) associated with the reported RI / PMI / CQI / LI to inform the gNB from which CMR to measure the CSI.

[0044] The gNB can configure the time domain behavior for CSI reporting in CSI-ReportConfig, such as periodic / semi-persistent / aperiodic reporting. The gNB can activate or deactivate semi-persistent CSI reporting through MAC Control Element (CE). The gNB can trigger aperiodic CSI reporting through Downlink Control Information (DCI). The UE can report periodic CSI through the Physical Uplink Control Channel (PUCCH) resources configured in CSI-ReportConfig. The UE can report semi-persistent CSI through the PUCCH resources configured in CSI-ReportConfig or the Physical Uplink Shared Channel (PUSCH) resources triggered by the gNB through DCI. The UE can report aperiodic CSI through the PUSCH resources triggered by the gNB through DCI.

[0045] 3GPP technical specifications (eg, since Release 15 or Rel-15) provide the following types of CSI-RS for physical layer (eg, layer 1) related measurements.

[0046] The CSI-RS used for tracking is also called a Tracking Reference Signal (TRS). It is a CSI-RS resource set configured with the RRC parameter TRS-Info. TRS is used for time / frequency offset tracking.

[0047] CSI-RS for Beam Management (BM): The CSI-RS for BM is configured in a CSI-RS resource set configured with the RRC parameter repetition.

[0048] CSI-RS for CSI acquisition. This is the CSI-RS used for CSI measurement and reporting. The CSI-RS for CSI acquisition is configured in the CSI-RS resource set that is not configured with the RRC parameters TRS-Info and repetition.

[0049] In the present disclosure, unless otherwise specified, CSI-RS indicates a CSI-RS used for CSI acquisition.

[0050] Since Rel-15, Type 2 CSI codebook for CSI reporting has been introduced for UE to measure and report CSI, where the precoder is quantized as follows:

[0051] in, For N Tx × 2L dimensional wideband precoder; is a subband precoder with a dimension of 2L × v; L indicates the number of beams, and v indicates the number of layers, which is RI+1.

[0052] Can be quantized based on the codebook, and The quantization can be performed based on the power and angle used for each element, which may result in a large overhead because is based on subbands, and there may be multiple subbands for CSI reporting, which is determined by the bandwidth used for CSI-RS. In one example, the codebook for W1 selection can be defined as follows:

[0053] in, represents the Kronecker product; L indicates the number of beams configured by RRC signaling; N1, N2, O1, and O2 are related to the number of ports and the oversampling factor configured by RRC signaling in the horizontal and vertical domains, and the candidate values ​​can be determined based on the number of CSI-RS ports. The codebook contains precoders with different values ​​of m and n. In one example, the candidate values ​​are defined as Table 5.2.2.2.1-2 in 3GPP TS 38.214.

[0054] The 3GPP technical specification (e.g., in Release 16 or Rel-16) further introduces an enhanced Type 2 codebook for CSI reporting for TRP, where the precoder may be quantized as follows:

[0055] in, Same as Rel-15 Type2 codebook, which is used to provide the spatial domain basis (SD-basis); indicates wideband beam combining weights having dimensions of 2L × M; and Indicates the frequency domain basis (FD-basis) with dimensions of N3 × M, where N3 is the number of subbands and can be derived from the RRC parameter numberOfPMI-SubbandsPerCQI-Subband, and M can be derived from the RRC signaling numberOfPMI-SubbandsPerCQI-Subband and paramCombination. The details of quantization can be referred to Section 5.2.2.2.5 in 3GPP TS 38.214.

[0056] The UE may be configured with multiple CSI-ReportConfigs for multiple CSI measurements and reports. Regarding multiple parallel CSI measurement and reporting processes, CSI processing units (CPUs) have been introduced since Rel-15. The UE may report how many CPUs it supports, and if the scheduling of the gNB results in more parallel CSI processing than the supported number of CPUs, the UE may report outdated CSI for low priority CSI reports, where the priority is calculated according to section 5.2.5 in 3GPP TS 38.214. For example, the CPU occupancy rules for periodic / semi-persistent / aperiodic CSI reporting are defined in 3GPP TS 38.214 section 5.2.1.6 (CSI processing criteria).

[0057] Figure 2 is an example diagram 200 depicting CSI processing unit (CPU) occupancy rules for periodic or semi-persistent CSI reporting. Figure 3 is an example diagram 300 depicting CSI processing unit (CPU) occupancy rules for aperiodic CSI reporting. Figure 2 In the present disclosure, periodic or semi-persistent CSI reports 245 (excluding the initial semi-persistent CSI report on PUSCH after a PDCCH triggered report) occupy the CPU from the first symbol of the earliest resource in each CSI-RS / CSI-IM / synchronization signal block (SSB) resource used for channel or interference measurement, no later than the corresponding latest CSI-RS / CSI-IM / SSB timing of the corresponding CSI reference resource, until the last symbol of the configured PUSCH / PUCCH carrying the report.

[0058] exist Figure 3 In the non-periodic CSI report 345, the CPU is occupied from the first symbol after the PDCCH 322 that triggers the CSI report until the last symbol of the scheduled PUSCH carrying the report. When the PDCCH reception includes two PDCCH candidates from two corresponding search space sets, as described in clause 10.1 of 3GPP TS 38.213 (see also TS 38.213 section 6), for the purpose of determining the CPU occupation duration, the PDCCH candidate that ends later in time is used.

[0059] The initial semi-persistent CSI report on PUSCH after PDCCH triggering occupies the CPU from the first symbol after the PDCCH until the last symbol of the scheduled PUSCH carrying the report. When PDCCH reception includes two PDCCH candidates from two corresponding search space sets, as described in clause 10.1 of 3GPP TS 38.213 (see also TS 38.213 section 6), for the purpose of determining the CPU occupation duration, the PDCCH candidate that ends later in time is used.

[0060] In addition, two minimum processing delays for CSI reporting are defined as follows, where the scheduling for CSI reporting may follow the minimum processing delays Z and Z'. Candidate values ​​of Z and Z' for different types of CSI reporting are defined in Section 5.4 of 3GPP TS 38.214. If the scheduling offset does not follow the minimum Z and Z', the UE may report outdated CSI or ignore the DCI if there are no other signals such as data and HARQ-ACK to be transmitted on the PUSCH triggered by the DCI.

[0061] When the CSI request field on the DCI triggers a CSI report on the PUSCH, the UE shall provide a valid CSI report for the nth triggered report in the following cases: • If the first uplink symbol used to carry the corresponding CSI report (including the effect of timing advance) is not earlier than symbol Z ref Start at, and • If the first uplink symbol used to carry the nth CSI report (including the effect of timing advance) is not earlier than symbol Z' ref (n) starts.

[0062] Figure 4 An example mechanism 400 for a single CSI report 445 for multiple CSI measurements for high or medium speed UEs according to some embodiments is shown. CSI enhancement for UEs with high / medium speeds (e.g., UEs with a mobile speed (or threshold speed) above 30 km / h relative to a network entity (e.g., BS)) may be used, where the UE may perform measurements on multiple CMR instances 403 and report CSI based on the measurements, as shown.

[0063] Since the UE's position does not change in a short time (e.g., a few time slots), the SD / FD basis does not change, and only the beam combining weights may change. For CMR instance t, the UE can select the precoder as:

[0064] For -N4+1 , t-N4+2 ,… The selected precoder for the N4 CMR instances at t0 can be expressed as follows:

[0065] Then the precoder W can be compressed as follows:

[0066] Where W td indicates a matrix with a dimension of N4 × T having T time domain bases (TD bases); indicates the new beam combining weights for N4 CMR instances with dimension 2L x M*T. The TD basis can also be expressed as a Doppler domain basis (DD basis).

[0067] For CSI measurement at high / medium speed, the first issue is about the control signaling to trigger multiple instances of aperiodic CSI-RS when CMR is configured as CMR for CSI feedback. The second issue is how to maintain the same understanding between gNB and UE about the time instance for CSI feedback. The third issue is how to calculate other CSI components, such as LI, CQI, based on the measured precoder and channel for multiple instances.

[0068] Figure 5 is a flow chart depicting a method 500 for wireless communication by a user equipment (UE) device according to some embodiments. The method is performed by processing logic, which includes hardware (e.g., circuit system, dedicated logic, programmable logic, processor, processing device, central processing unit, system on chip (SoC), etc.), software (e.g., instructions and / or applications running / executed on a processing device), firmware (e.g., microcode), or a combination thereof. The method 500 is performed by the UE device. The UE device may include one or more radio frequency (RF) modems, a processor coupled to the one or more RF modems, and at least one non-volatile memory storing executable instructions to manipulate at least one of the processor or the RF modem to perform the method 500. A network entity may perform complementary methods to interact with the UE device performing the method 500 (see Figure 6 600 in the call flow diagram).

[0069] refer to Figure 5 , the method illustrates example functionality used by various embodiments. Although specific functional blocks ("boxes") are disclosed in the method, such blocks are examples. That is, the embodiments are well suited to performing various other boxes or variations of boxes set forth in the method. It should be understood that the boxes in the method may be executed in an order different from the order presented, and not all boxes in the method may be executed.

[0070] like Figure 5 As shown, method 500 includes block 510: transmitting, by a UE device to a network entity, an indication of the ability to report channel state information (CSI) reports based on signals of multiple channel measurement resources (CMRs) or multiple transmission / reception points (TRPs) of the network entity.

[0071] The method 500 includes block 520 of receiving, from a network entity acting in response to an indication transmitted by the UE device, a configuration message that configures the UE device to determine CSI reporting.

[0072] The method 500 includes a block 530 of performing measurements of signals and noise according to the configuration message. For example, the UE device may perform concurrent measurements of a plurality of CMRs and at least one interference measurement resource (IMR) by the UE device for a plurality of time instances as configured according to the configuration message. In some cases, the method 500 includes preparing a single CSI report reflecting time domain changes for two or more of the plurality of CMRs based on the concurrent measurements.

[0073] The method includes block 540 of transmitting to a network entity a CSI report including measurements performed according to the configuration message.For example, the UE device may transmit to the network entity a single CSI report including the concurrent measurements performed.

[0074] In some aspects, the method 500 further includes decoding a plurality of instances of a CSI reference signal (CSI-RS) using a codebook configured for CSI measurement based on a configuration message from a network entity, the plurality of instances including one or more of: a CMR, an IMR, and a time instance for CSI measurement. The method 500 may also include: obtaining a precoder value based on at least one layer indicator (LI) or a channel quality indicator (CQI) corresponding to each of two or more of the plurality of CMRs and at least one IMR; and transmitting a CSI report to the network entity, the CSI report including the precoder and one or both of the LI and the CQI.

[0075] In some embodiments, the method 500 may include performing concurrent measurements on a plurality of CMRs and at least one IMR at a plurality of time instances. The method may include determining or generating a single CSI report reflecting time domain variations for each of two or more of the plurality of CMRs when the UE device exceeds a threshold speed. The UE device may transmit the single CSI report to a network entity.

[0076] In some embodiments, the configuration message comprises at least one of: a radio resource control (RRC) message; a medium access control (MAC) control element (MAC CE); or downlink control information (DCI). The multiple instances of CSI-RS include aperiodic or semi-persistent CSI-RS.

[0077] In some embodiments, the indication of the ability to report CSI reports includes any of: a maximum number of instances of CSI-RS resources that the UE device is able to measure for CSI reporting; a number of CSI processing units (CPUs) occupied for CSI-RS with multiple instances; an upper limit on the number of information elements (IEs) configured for CSI reporting; a minimum processing delay for CSI reporting; and whether CSI prediction based on CSI measurements of virtual CMR instances is supported.

[0078] In some embodiments, the method 500 may further include receiving downlink control information (DCI) for triggering a plurality of CMRs and at least one IMR from a network entity, the plurality of CMRs including a plurality of instances of a CSI-RS.

[0079] In some embodiments, the UE device may obtain the precoder by: identifying an instance of the CSI-RS as a CMR; and performing CSI measurement on the instance of the CSI-RS.

[0080] In some embodiments, the configuration message may include: indicating the number of multiple instances of CSI-RS for use in CSI reporting; the number of time domain bases; and a scheme for CSI measurement. The scheme for CSI measurement may include a scheme based on multiple virtual CMRs and multiple physical CMRs measured before a minimum processing delay for CSI reporting.

[0081] In some cases, method 500 may further include transmitting a CSI report to a network entity, the CSI report including multiple measurements of LI and CQI based on: (1) a CMR with the most energy among a plurality of CMRs or a CMR with the least energy among a plurality of CMRs; (2) corresponding performance of one or more CMRs among a plurality of CMRs; (3) a precoder; (4) a minimum value and a maximum value of CQI; or (5) a correspondence with a first instance and a last instance of a plurality of CMRs. In some cases, a codebook is used to decode aperiodic CSI-RS, and the CSI report is reported by the UE device using these aperiodic CSI-RS when the UE device is traveling at a speed not less than a threshold speed relative to the network entity.

[0082] Figure 6An example call flow diagram 600 is shown to support enhanced aperiodic CSI feedback for UE devices 102 with high / medium speeds in accordance with some embodiments. Initially, the UE 102 may report 610 to the gNB 104 one or more capabilities indicating support for enhanced aperiodic CSI feedback for high / medium UE speeds (e.g., a maximum number of instances of aperiodic CSI-RS resources that the UE may measure for enhanced CSI feedback). In some embodiments, the gNB may receive the one or more capabilities from a core network (e.g., an access and mobility management function (AMF)) or another gNB.

[0083] After receiving the capabilities, the gNB may send a configuration message (e.g., an RRCReconfiguration message or an RRCResume message) to the UE including a configuration to enable enhanced aperiodic CSI feedback. For example, the gNB transmits 620 a configuration of a CSI framework for CSI reporting for high / medium UE speeds with time instance related information. In some implementations, the gNB may include the configuration in a CSI-ReportConfigReportConfig IE and include the CSI-ReportConfig IE in an RRC message.

[0084] After transmitting the configuration to UE 102, gNB 104 may transmit DCI to the UE to trigger 622 multiple instances of aperiodic CSI-RS configured as CMR. For example, gNB 104 may trigger 622 aperiodic CSI reporting and multiple instances of aperiodic CSI-RS for high / medium UE speeds. Thus, gNB 104 transmits 624 aperiodic CSI-RS for CMR instance 1, transmits 626 aperiodic CSI-RS for CMR instance 2, ..., and transmits 628 aperiodic CSI-RS for CMR instance N4.

[0085] The UE 102 may then perform 630 measurements on multiple instances of the aperiodic CSI-RS. The UE obtains or derives a channel estimate and / or signal to interference plus noise (SINR) from the measurements. The UE selects a precoder matrix W (e.g., components of the CSI) and selects other components of the CSI, such as LI and CQI, based on the selected precoder matrix and the channel estimate. Finally, the UE reports 640 the CSI (e.g., components described above) for high / medium UE speeds to the gNB, and the gNB performs 650 CSI decoding.

[0086] In one embodiment, the one or more capabilities include at least one of the following capabilities: 1) the maximum number of instances of aperiodic CSI-RS resources for which the UE can measure and obtain CSI for enhanced aperiodic CSI feedback, 2) Maximum number of CSI-ReportConfigReportConfig IEs with aperiodic CSI-RS, 3) the number of CPUs occupied for aperiodic CSI-RS with multiple instances, and 4) the minimum processing delay defined by parameters Z and Z' for CSI reporting based on aperiodic CSI-RS with multiple instances, or 5) Whether CSI prediction is supported, such as CSI measurement based on virtual CMR instances.

[0087] Each, some or all of the above one or more capabilities may be defined or specified per bandwidth part (BWP), per frequency band, per frequency band combination, or per component carrier (CC) or across CCs in a frequency band combination.

[0088] In one embodiment, the configuration for enhanced aperiodic CSI feedback or CSI-ReportConfig may include a new codebook configuration for the codebook CSI-ReportConfig. The new codebook configuration may include at least one of the following configuration parameters: • Number of beams (L) • Number of ports in horizontal and vertical domains (N1, N2) • The number of oversampling factors in the horizontal and vertical domain (O1, O2) • Number of subbands per CQI calculation, which indicates the number of subbands used for CSI compression for CQI calculation • RI restriction, which is used to indicate the candidate ranks for precoder selection • The number of CMR instances used for CSI reporting, which indicates the value of N4 • The number of time domain bases, which indicates the value of T • CSI measurement solution

[0089] In some implementations, the number of CMR instances may be determined based on the number of triggered aperiodic CSI-RS instances configured as CMRs. For example, if the gNB triggers N4 instances of aperiodic CSI-RS, the number of CMR instances is N4. Details on triggering more than 1 instance of aperiodic CSI-RS are shown in the next embodiment. Therefore, RRC parameters regarding the number of CMR instances may not be provided for CSI reporting based on aperiodic CSI-RS.

[0090] In some implementations, regarding the dynamic switching between the legacy codebook and the new codebook for enhanced aperiodic CSI feedback, in some implementations, the gNB may dynamically update or configure the number of instances (N4) through layer 1 (L1) or layer 2 (L2) signaling, such as MAC CE or DCI. For example, the gNB includes the N4 value in a configuration (e.g., RRC configuration) for enhanced aperiodic CSI feedback, and transmits a MAC CE or DCI including a new N4 value to the UE to update the N4 value configured in the RRC configuration. In another example, the gNB transmits a MAC CE or DCI including the N4 value to the UE instead of transmitting an RRC message including N4 to the UE. In this example, the configuration for enhanced aperiodic CSI feedback does not include the number of instances (N4).

[0091] In some other implementations, the number of instances (N4) may be reported by the UE to the gNB. In one implementation, the UE determines a number of instances that is less than or equal to the number of instances configured by the gNB. In one example, in the CSI report, the UE may include a value of N4 and a CSI component based on the reported N4. If the UE uses the long PUCCH format or PUSCH to transmit the CSI report, the UE includes the N4 value in CSI Part 1 in the CSI report. If the UE uses the short PUCCH format to transmit the CSI report, the UE may not include the N4 value in the CSI report. Table 1 shows an example of CSI Part 1 in a CSI report. In some embodiments, the UE includes the value of N4 in CSI Part 2 in the CSI report. Table 1: An example of CSI reporting with number of instances

[0092] “CSI measurement scheme” may configure the UE to select one of the following schemes to identify the N4 time instances for CSI reporting.

[0093] Solution 1: The reported CSI may be measured based on N4 instances of the CMR before the minimum processing delay for CSI reporting.

[0094] Solution 2: The reported CSI may be measured based on virtual N4 CMR instances and the actual CMR before the minimum processing delay for CSI reporting.

[0095] Figure 7An example scheme 700 with time domain interpolation according to some embodiments is shown. As shown, the scheme 700 includes multiple actual CMRs 710 and IMRs 705 for CSI measurement by a UE device before time domain interpolation. After transmitting the CSI report 720, multiple virtual CMRs 730, 732, ... and 734 separated by virtual CMR intervals 724 can be used to identify time instances for time domain interpolation 726. For scheme 2, the UE needs to apply time domain interpolation as shown. Some additional parameters as follows may be predefined or configured in CSI-ReportConfig via RRC signaling: A starting offset 722 of a first virtual CMR instance 730 for CSI measurement, the starting offset being used to indicate a time domain position of a starting CMR instance with reference to the first symbol or the last symbol of a CSI report; An interval 724 of virtual CMR instances 730, 732, ..., 734 for CSI measurement, the interval being used to indicate an interval between each virtual CMR instance 730, 732, ..., 734; and The number 718 of the actual CMR instances 710 used for CSI measurement is used to indicate the actual CMR instances used for CSI measurement before time domain interpolation.

[0096] In one example, the starting offset for the virtual CMR instance may be predefined as X time slots after the time slot with the CSI report or the first symbol / last symbol of the CSI report. The virtual CMR interval may be predefined as X time slots. The value of X may be the same as the interval for the actual CMR. The number of actual CMR instances may be the same as the number of instances of the triggered aperiodic CSI-RS for CSI measurement. In some other implementations, the CSI measurement scheme selected for the CMR instance may be reported by the UE. In one example, in the CSI report, the UE may report the CSI measurement scheme selected for the CMR instance.

[0097] In an embodiment, the gNB may trigger multiple instances of aperiodic CSI-RS via DCI (e.g., DCI format 0_1 ​​or 0_2).

[0098] In one implementation, for CSI-RS resources, the gNB may configure the number of instances and the interval between two consecutive instances through RRC signaling, RRC parameters in NZP-CSI-RS-Resource. Then, when such CSI-RS resources are triggered through DCI, such as when triggered through the DCI field CSI request, the gNB may transmit CSI-RS in the configured instances, where the time domain position for the first instance is configured through RRC signaling. In one example, the following RRC parameters nrofInstances and instanceInterval may be introduced to provide multi-instance aperiodic CSI-RS configuration.

[0099] In another implementation, the gNB may trigger multiple instances of CSI-RS by triggering a CSI-RS set with CSI-RS resources with the same configuration via DCI (e.g., DCI field CSI request). In a CSI-RS resource set, an RRC parameter may be introduced to indicate that the CSI-RS are from the same port and / or another RRC parameter may be introduced to provide an interval between two CSI-RS resources. In one example, the following RRC parameters samePort and instanceInterval may be introduced to provide a multi-instance aperiodic CSI-RS configuration. For the CSI-RS resources in a resource set, the RRC parameters except nzp-CSI-ResourceId may be the same, or the RRC parameters configured for the CSI-RS resource with the smallest ID may be applied to all CSI-RS resources in the resource set.

[0100] In another implementation, the gNB may configure the number of instances of the triggered aperiodic CSI-RS resources and / or the interval between two consecutive instances through the DCI for triggering the aperiodic CSI-RS resources. In one example, the number of instances of a field may be introduced in the DCI. In another example, the interval between two consecutive instances of a field CSI-RS may be introduced in the DCI.

[0101] In an embodiment, upon receiving signaling to trigger CSI reporting for high / medium UE speed, the UE may select a precoder for a target time instance as follows.

[0102] In one implementation, the UE may measure and report the LI / CQI corresponding to a CMR instance. The UE may report the LI / CQI based on the precoder used for the first CMR instance or the last CMR instance. In some embodiments, the UE may report the LI / CQI based on the CMR instance closest to the CSI report or IMR. In some embodiments, the UE may report the LI / CQI based on the CMR instance with the best or worst energy / performance among the CMR instances. In some embodiments, the CMR instance may be configured by the gNB based on RRC signaling, MAC CE, or DCI. In some embodiments, the CMR instance index used to derive the LI / CQI may be reported by the UE in the CSI report. The CMR instance may be an actual CMR instance or a virtual CMR instance.

[0103] In another implementation, the UE may measure and report multiple LI / CQIs corresponding to multiple CMR instances. The UE may report the LI / CQI based on the precoder used for each CMR instance. In some embodiments, the UE may report two LI / CQIs based on the CMR instance, the two LI / CQIs representing the minimum CQI and the maximum CQI measured among the CMR instances and the LI measured from these CMR instances. In some embodiments, the UE may report two LI / CQIs corresponding to the first CMR instance and the last CMR instance, respectively. The CMR instance may be an actual CMR instance or a virtual CMR instance.

[0104] In another implementation, the UE may measure and report the LI / CQI based on the average precoder and channel among multiple CMR instances. The CMR instance used for LI / CQI selection may be the same as the CMR instance used for precoder calculation. In some embodiments, the CMR instance used for LI / CQI selection may be configured by RRC parameters in CSI-ReportConfig, or RRC signaling of MAC CE, or DCI, for example.

[0105] Figure 8 is a depiction according to some embodiments by a UE device (such as Figure 6 Flow chart of method 800 for wireless communication performed by UE device 102). Fig. 9 is a diagram according to some embodiments complementary to method 800 by a network entity such as Figure 6 Flow chart of method 900 for wireless communication performed by gNB 104).

[0106] like Figure 8 As shown, method 800 transmits 810 to a network entity a UE capability indicating support for enhanced aperiodic CSI feedback (similar to Figure 6 The process begins with operation 610 of FIG.

[0107] The UE device receives 820 a control signaling (similar to Figure 6 The UE device receives 822 the CSI report trigger signaling and the CMR and / or IMR (e.g., multiple CMRs and at least one IMR, such as Figure 7 As shown, similar to Figure 6 Operation 622).

[0108] The UE device identifies 830 a CMR instance for CSI measurement and performs CSI measurement (similar to Figure 6 The UE device then sends 840 a CSI report for high or medium UE speed to the network entity (similar to Figure 6 Operation 640).

[0109] like Fig. 9 As shown, method 900 includes receiving 910 from a UE device a UE capability (similar to Figure 6 The process begins with operation 610 of FIG.

[0110] The network entity transmits 920 to the UE device a control signaling (similar to Figure 6 Operation 620). The network entity transmits 922 CSI report trigger signaling (similar to Figure 6 operation 622) and multiple CMRs and / or one or more IMRs (similar to Figure 6 Operations 624, 626, 628).

[0111] The network entity receives 940 a CSI report with CSI for high or medium UE speed from the UE device (similar to Figure 6 Operation 640 of ). Based on the CSI report, the network entity determines 955 a CMR instance of the reported CSI, identifies a precoder for further downlink transmission, and transmits a downlink channel based on the identified precoder.

[0112] In some implementations, the gNB determines whether to configure enhanced aperiodic CSI feedback for the UE based on whether one or more capabilities indicating support for enhanced aperiodic CSI feedback are received. If the gNB receives one or more capabilities of the UE indicating support for enhanced aperiodic CSI feedback, the gNB transmits control signaling (e.g., an RRC message, such as an RRCReconfiguration message or an RRCResume message) to the UE to configure enhanced aperiodic CSI feedback. Otherwise, if the gNB determines that the UE does not support enhanced aperiodic CSI feedback, the gNB avoids configuring enhanced aperiodic CSI feedback for the UE. That is, the gNB avoids transmitting control signaling to configure enhanced aperiodic CSI feedback to the UE. In this case, the gNB may transmit control signaling (e.g., an RRC message, such as an RRCReconfiguration message or an RRCResume message) to configure legacy aperiodic CSI feedback to the UE. After configuring legacy aperiodic CSI feedback for the UE, the gNB may transmit CSI report triggering signaling (e.g., MAC CE or DCI) to the UE to trigger legacy aperiodic CSI feedback.

[0113] In some further implementations, if the gNB determines that the UE supports enhanced aperiodic CSI feedback based on one or more capabilities indicating support for enhanced aperiodic CSI feedback, the gNB may determine whether to configure enhanced aperiodic CSI feedback for the UE based on the mobility state of the UE. The gNB communicates with a UE operating in a connected state (e.g., an RRC_CONNECTE state). If the gNB determines that the UE is in a high or medium mobility state, the gNB transmits control signaling (e.g., an RRC message, such as an RRCReconfiguration message or an RRCResume message) to the UE to configure enhanced aperiodic CSI feedback for the UE. Otherwise, if the gNB determines that the UE is in a low mobility state, the gNB avoids configuring enhanced aperiodic CSI feedback for the UE. That is, the gNB avoids transmitting control signaling to configure enhanced aperiodic CSI feedback to the UE. In some implementations, if the gNB determines that the UE is in a low mobility state, the gNB may transmit control signaling (e.g., an RRC message, such as an RRCReconfiguration message or an RRCResume message) to the UE to configure traditional aperiodic CSI feedback.

[0114] In some embodiments, regardless of the mobility state of the UE, the gNB may transmit control signaling (e.g., an RRC message, such as an RRCReconfiguration message or an RRCResume message) to the UE to configure the legacy aperiodic CSI feedback. After configuring the legacy CSI feedback for the UE, the gNB may transmit CSI report triggering signaling to the UE to trigger the legacy aperiodic CSI feedback.

[0115] In other implementations, as described above, regardless of the mobility state of the UE, the gNB determines to configure enhanced aperiodic CSI feedback for the UE based on one or more capabilities indicating support for enhanced aperiodic CSI feedback. The gNB communicates with a UE operating in a connected state (e.g., RRC_CONNECTE state). If the gNB determines that the UE is in a high or medium mobility state, the gNB transmits CSI report trigger signaling and CMR / IMR to the UE. Otherwise, if the gNB determines that the UE is in a low mobility state, the gNB avoids transmitting CSI report trigger signaling and CMR / IMR to the UE. In some implementations, the gNB may configure traditional aperiodic CSI feedback for the UE as described above. After configuring traditional CSI feedback for the UE, the gNB may transmit CSI report trigger signaling to the UE to trigger traditional aperiodic CSI feedback.

[0116] In some implementations, the gNB may determine the mobility state of the UE based on a sounding reference signal received from the UE. In other implementations, the gNB may determine the mobility state of the UE based on a Doppler effect (e.g., Doppler shift and / or Doppler spread) report received from the UE. In yet other implementations, the gNB may determine the mobility state of the UE based on a mobility state report received from the UE. For example, the gNB may transmit a message to the UE to configure the UE to report the mobility state. In one implementation, the message may be an RRCReconfiguration message, an RRCResume message, or a MAC CE. In response to the message, the UE transmits a mobility state report including the mobility state of the UE to the gNB. In one implementation, the mobility state report may be an RRC message (e.g., a UEAssistanceInformation message) or a MAC CE. In some implementations, the mobility state report may include a mobility state (e.g., high, medium, or low) and / or a speed. In some implementations, the gNB may include one or more thresholds in the message. The UE uses the one or more thresholds to determine the mobility state (eg, high, medium, or low).

[0117] Fig.10An example call flow diagram 1000 is shown to support enhanced aperiodic and semi-persistent CSI feedback for UE devices 102 with high or medium speeds in accordance with some embodiments. For example, the call flow diagram shows a general process for CSI feedback for high / medium UE speeds based on periodic / semi-persistent CSI-RS. As shown, the UE device 102 transmits 1010 to the gNB 104 a UE capability report for CSI feedback based on periodic or semi-persistent CSI-RS for high or medium UE speeds. Figure 6 Compared with the call flow chart 600 in FIG. 1 , the differences are as follows.

[0118] When the UE device 102 transmits 1010 the UE capability report, the UE device 102 may report whether it supports CSI feedback for high / medium UE speeds based on periodic / semi-persistent CSI-RS, as well as the maximum number of periodic / semi-persistent CSI-RS resources, the maximum number of instances, the maximum number of CSI report configurations for periodic / semi-persistent CSI, and / or the maximum number of periodic / semi-persistent CSI reports.

[0119] The gNB 104 sends 1020 a configuration of a CSI framework for CSI reporting for high / medium UE speeds with information related to the number of instances. In the control signaling of the CSI framework for CSI reporting, the gNB 104 may only need to configure the number of instances (N4) and / or the CSI reporting scheme. The interval between two consecutive instances may be derived based on the periodicity of the periodic / semi-persistent CSI-RS.

[0120] The gNB 104 then transmits 1021 CSI-RS for CMR and associated IMR. In some cases, some or all of the instances of CSI-RS configured as CMR may be transmitted prior to control signaling to trigger CSI reporting (when the gNB 104 triggers 1022 aperiodic or semi-persistent CSI reporting). The signaling to trigger semi-persistent CSI reporting may be a MAC CE. In some implementations, the number of instances (N4) may be indicated by the MAC CE.

[0121] The gNB 104 then transmits 1024 the CSI-RS for the CMR and the associated IMR to the UE device 102. The UE device 102 performs 1030 CSI measurements based on multiple instances of the CMR and generates a CSI report. Since the CSI is measured over multiple time instances, the CSI measurements reflect the dynamic characteristics of the UE device 102 when traveling at a high or medium speed, such as, for example, 30 km / h.

[0122] The UE device 102 transmits 1040 a CSI report with CSI for high or medium UE speeds. Upon receiving the CSI report, the gNB 104 decodes 1050 the reported CSI (e.g., to identify a precoder to be used for the transmission, similar to Figure 6 Operation 650).

[0123] In the present disclosure, unless otherwise specified, RRC signaling may indicate an RRC reconfiguration message from the gNB to the UE, or a system information block (SIB), where the SIB may be an existing SIB (e.g., SIB1) or a new SIB transmitted by the gNB. In addition, the gNB may obtain the UE capabilities via UE capability report signaling or from the core network (e.g., access and mobility management function (AMF)).

[0124] Further, in the present disclosure, the solutions described are based on 5G NR technology. It is understood that these solutions can also be applied to other wireless technologies such as 6G. "gNB" can be summarized as a base station or a radio access network (RAN) node.

[0125] Fig.11 1 is an example 1100 illustrating coherent joint transmission (CJT) according to some embodiments. As shown, the UE can transmit up to N TRP (For example, N TRP =4) transmission and reception points (TRPs) (e.g., TRP 1, TRP 2, TRP 3, TRP 4) receive downlink signals. For CJT, cross-TRP antenna combining can be applied. In one example, the precoder for the PDSCH transmission layer can be generated as ,in indicates the antenna combining factor for TRP k, and indicates the Precoder.

[0126] Since Rel-15, Type 2 CSI codebook for CSI reporting for TRP has been introduced for UE to measure and report CSI, where the precoder is quantized as follows:

[0127] in, For N Tx × 2L dimensional wideband precoder; is a subband precoder with a dimension of 2L × v; L indicates the number of beams, and v indicates the number of layers, which is RI+1.

[0128] Can be quantized based on the codebook, and The quantization can be performed based on the power and angle used for each element, which may result in a large overhead because is based on subbands, and there may be multiple subbands for CSI reporting, which is determined by the bandwidth used for CSI-RS. In one example, the codebook for W1 selection can be defined as follows:

[0129] in, represents the Kronecker product; L indicates the number of beams configured by RRC signaling; N1, N2, O1, and O2 are related to the number of ports and the oversampling factor configured by RRC signaling in the horizontal and vertical domains, and the candidate values ​​can be determined based on the number of CSI-RS ports. The codebook contains precoders with different values ​​of m and n. In one example, the candidate values ​​are defined as Table 5.2.2.2.1-2 in 3GPP TS 38.214.

[0130] In Rel-16, an enhanced Type 2 codebook for CSI reporting for TRP is introduced, where the precoder can be quantized as follows:

[0131] in, indicates wideband beam combining weights having dimensions of 2L × M; and Indicates a frequency domain basis with dimensions of N3 × M, where N3 is the number of subbands and can be derived from the RRC parameter numberOfPMI-SubbandsPerCQI-Subband, and M can be derived from the RRC signaling numberOfPMI-SubbandsPerCQI-Subband and paramCombination. Details can be found in section 5.2.2.2.5 of 3GPP TS 38.214.

[0132] One possible way to perform CSI feedback for CJT is to report the quantized CSI as ,in Indicates the quantized precoder for TRP k. In some embodiments, another possible approach is to expand the current codebook for multi-TRP operation by considering beams from multiple TRPs. The dimension of each weight can be defined as: Is a N TRP *N Tx × N TRP *2L dimensional wideband precoder, Indicates NTRP *Wideband beam combining weights of 2L × M dimensions.

[0133] Regardless of which quantization scheme is used, how to configure the CSI framework to support CSI feedback for CJT and UE behavior for CMR / IMR measurement and CSI-RS reception may be an issue (e.g., CMR / IMR configuration and association, CSI-RS configuration). The CSI framework may also support TRP selection. A second issue may be how to define UE behavior for CJT CSI measurement (e.g., CPU occupancy rules and minimum processing delay for CJT CSI measurement and reporting).

[0134] Fig.12 is a flow chart depicting a method 1200 of CJT CSI reporting performed by a user equipment (UE) device according to some embodiments. The method 1200 is performed by processing logic, which includes hardware (e.g., circuit system, dedicated logic, programmable logic, processor, processing device, central processing unit, system on chip (SoC), etc.), software (e.g., instructions and / or applications running / executed on a processing device), firmware (e.g., microcode), or a combination thereof. The method 1200 is performed by a UE device. The UE device may include one or more radio frequency (RF) modems, a processor coupled to the one or more RF modems, and at least one non-volatile memory storing executable instructions to manipulate at least one of the processor or the RF modem to perform the method 1200. A network entity may perform complementary methods to interact with the UE device performing the method 1200 (see Fig.13 1300 in the call flow diagram).

[0135] refer to Fig.12 , method 1200 illustrates example functionality used by various embodiments. Although specific functional blocks ("blocks") are disclosed in the method, such blocks are examples. That is, embodiments are well suited to performing various other blocks or variations of blocks set forth in the method. It should be understood that the blocks in the method may be executed in an order different from the order presented, and not all blocks in the method may be executed.

[0136] like Fig.12 As shown, method 1200 includes block 1210: decoding a configuration of a UE device based on a configuration message from a network entity, the configuration being used to include coherent joint transmission-based channel state information (CJT-CSI) in a CSI report. CJT-CSI includes CSI measurements of signals from multiple TRPs coherently combined at the UE device by joint antenna precoding at the multiple TRPs.

[0137] The method 1200 includes block 1220 of receiving a plurality of CMRs from a plurality of TRPs and at least one IMR associated with a CMR in the plurality of CMRs.

[0138] The method 1200 includes block 1230 of measuring CJT-CSI based on a plurality of CMRs and at least one IMR.

[0139] The method 1200 includes block 1240 of transmitting a CSI report including one or more indexes corresponding to a plurality of CMRs to a plurality of TRPs.

[0140] In some embodiments, the configuration message comprises at least one of: a radio resource control (RRC) reconfiguration message; or a system information block (SIB).

[0141] In some embodiments, for each component carrier (CC), each bandwidth part (BWP), each frequency band, each frequency band configuration, or each UE device in a group of UE devices that includes the UE device, an indication of the ability to report CSI reports includes any one of: the maximum number of TRPs supported by the UE device for CSI reporting for CJT-CSI; the maximum number of CMRs for each configuration message for CJT-CSI; the maximum number of antenna ports for each CMR in multiple CMRs; the maximum number of total antenna ports across multiple CMRs for CSI reporting; the maximum number of CMRs across multiple configuration messages (of CSI-reportConfig); and the maximum number of multiple configuration messages.

[0142] In some embodiments, the plurality of CMRs include one or more CMR groups across a plurality of TRPs, the one or more CMR groups being configured by a configuration message, and the CSI report includes an index identifying one of the one or more CMR groups.

[0143] In some embodiments, the CSI report further includes at least one of: a rank indicator (RI); a precoder matrix indicator (PMI); a channel quality indicator (CQI); a layer indicator (LI); or one or more CSI-RS resource indicators (CRI).

[0144] In some embodiments, the UE device may perform concurrent measurements by measuring CJT-CSI when a CSI processing unit (CPU) at the UE device is available for processing multiple CMRs, wherein the CPU at the UE device is configured based on the total number of one or more CMR groups. For example, the UE device may determine that a trigger for including CJT-CSI in a CSI report requires a number of CPUs that exceeds a maximum number of CPUs included in an indication of an ability to report a CSI report; and discard the trigger or determine that the trigger corresponds to an erroneous request from a network entity.

[0145] In some embodiments, the UE device may run multiple CPUs to perform multiple CJT-CST measurements in parallel for inclusion in the CSI report; wherein the number of the multiple CPUs determines the maximum number of CJT-CSI measurements that the UE device can perform in parallel.

[0146] In some embodiments, the at least one IMR includes one or more of a zero power IMR (ZP-IMR) and a non-zero power IMR (NZP-IMR), and wherein the at least one IMR is associated with one of the one or more CMR groups.

[0147] The method 1200 may further include: measuring at least one IMR using a plurality of receive beams at the UE device; or measuring at least one IMR across two or more CMRs in one of the one or more CMR groups.

[0148] Fig.13 An example call flow diagram 1300 for CJT CSI reporting in accordance with some embodiments is shown. As shown, the call flow diagram 1300 illustrates a general procedure for CJT-based CSI (CJT-CSI) reporting by a UE device 102 to a gNB 104. As shown, the UE 102 reports 1302 to the gNB 104 regarding UE capabilities for CJT-CSI measurement and reporting. In response to the indicated UE capabilities, the gNB 104 sends 1310 a configuration to configure the UE device 102 for a CSI framework for CJT-CSI reporting.

[0149] UE device 102 receives 1312 a trigger for CJT-CSI reporting from gNB 104. UE device 102 receives 1320 a CMR and associated IMR for CJT-CSI measurement and performs 1330 CJT-CSI measurement based on the received CMR and IMR, CPU occupancy rules, and minimum processing delay. UE device 102 then transmits 1340 the CJT-CSI report to gNB 104.

[0150] The UE device 102 may perform CJT-CSI measurement and reporting based on one, some, or all of the following capabilities for CJT-CSI measurement and / or reporting: • Maximum number of TRPs that a UE can support for CJT-CSI reporting • The maximum number of CJI-CSI reports for which a UE can simultaneously measure and process reference signals. • Minimum processing delay for CJT-CSI measurement and reporting

[0151] In some implementations, each, some, or all of the capabilities may be defined or specified per CC per frequency band combination supported by the UE. Each, some, or all of the one or more capabilities for each CC in the frequency band combination supported by the UE may be the same or different. Each, some, or all of the capabilities for CCs in different frequency band combinations supported by the UE may be the same or different.

[0152] In other implementations, each, some, or all of the capabilities may be defined or specified according to the frequency band combination supported by the UE. Each, some, or all of the capabilities for different frequency band combinations supported by the UE may be the same or different. In some implementations, the frequency band combination may be an intra-band contiguous frequency band combination, an intra-band non-contiguous frequency band combination, or an inter-band frequency band combination.

[0153] In yet other implementations, each, some, or all of the capabilities may be defined or specified according to the frequency bands supported by the UE. The capabilities (each or some of the capabilities) for the frequency bands supported by the UE may be the same or different.

[0154] In yet other implementations, each, some, or all of the capabilities may be defined or specified according to a frequency range (FR) supported by the UE. Each, some, or all of the one or more capabilities for the FRs (e.g., FR1 and FR2) supported by the UE may be the same or different.

[0155] In still other implementations, each, some, or all of the capabilities may be defined or specified per UE, for example, regardless of CC, band combination, band, and FR.

[0156] In some implementations, the UE may transmit 1302 each, some, or all of the capabilities to the gNB. In one implementation, the UE transmits a UE capability information message (e.g., a UECapabilityInformation message) including multiple UE capabilities (e.g., UE-NR-Capability IE) of the UE to the gNB, the multiple UE capabilities including one, some, or all of the capabilities. The gNB may transmit the multiple UE capabilities to a core network (CN) (e.g., an access and mobility function (AMF)), and the CN stores the multiple UE capabilities for the UE. In another implementation, the UE uses a capability ID to identify multiple UE capabilities that have been pre-stored in the CN. The UE transmits a non-access stratum (NAS) message including the capability ID to the CN via the gNB. Using any of the above implementations, when the UE next connects to the gNB, the gNB may receive the multiple UE capabilities from the CN without requesting the UE to transmit the multiple UE capabilities. In other implementations, one, some, or all of the capabilities for CJT-CSI measurement and / or reporting may be predefined in the 3GPP specification without the UE transmitting the capability / capabilities to the gNB or CN.

[0157] Based on the capabilities for CJT-CSI measurement and / or reporting, the gNB may configure the UE to perform CJT-CSI measurement and reporting. In some implementations, the gNB transmits 1310 an RRC message (e.g., an RRCReconfiguration message or an RRCResume message) to the UE including a CSI-reportConfig IE, wherein each IE may configure a CMR, at least one IMR associated with each of the CMRs for CJT-CSI measurement, and configuration of uplink resources such as PUCCH or PUSCH for CJT-CSI reporting. In some implementations, the gNB may configure multiple CMR groups and IMRs associated with each CMR group in the RRC message for CJT-CSI measurement. In one implementation, each of the CMR groups includes or configures multiple CMRs, wherein each CMR may be associated with one or more IMRs. Based on the CMR groups, the UE determines the CMRs in the CMR groups (each of the CMR groups) for CJT-CSI measurement. Thus, the UE performs 1330 CJT-CSI measurements based on the CMR or CMR groups and associated IMRs (if configured). In some implementations, the gNB may include a CMR group index for each of the CMR groups in the RRC message. In other implementations, the gNB does not include the CMR group index in the RRC message. In such cases, the UE may determine the CMR group index for each of the CMR groups based on the order of each CMR group in a container (e.g., a list IE, such as an add and / or modify list IE) that includes the CMR groups.

[0158] In some implementations, the gNB may trigger 1312 CJT-CSI reporting by transmitting a trigger message (e.g., MAC-CE or DCI) to the UE. In response to the trigger message, the UE transmits 1340 one or more CJT-CSI reports to the gNB on uplink resources. In one example, the gNB may trigger semi-persistent CJT-CSI reporting by transmitting a MAC CE to the UE. The gNB may stop or deactivate semi-persistent CJT-CSI reporting by transmitting a deactivation command (e.g., MAC CE) to the UE. In another example, the gNB may trigger aperiodic CJT-CSI reporting by transmitting a DCI to the UE. In some implementations, the UE may perform CJT-CSI measurements based on the CMR / IMR configured in the CSI-reportConfig IE for periodic CJT-CSI reporting. In some implementations, upon receiving the trigger message, the UE may perform CJT-CSI measurements based on the CMR / IMR configured in the CSI-reportConfig IE for semi-persistent or aperiodic CJT-CSI reporting. After receiving the deactivation command, the UE may stop performing CJT-CSI measurements based on the CMR / IMR configured in the CSI-reportConfig IE for semi-persistent CJT-CSI reporting.

[0159] In some implementations, the UE has multiple CSI processing units (CPUs) dedicated to CJT-CSI measurement and / or reporting. In one implementation, the number of CPUs determines the maximum number of CJT-CSI reports for which the UE can simultaneously measure and process reference signals, thereby providing this capability. While performing CJT-CSI measurement and / or reporting, the UE determines the CPU occupancy for each of the CSI processing units (CPUs).

[0160] In other implementations, the UE has multiple CSI processing units (CPUs), which the UE can use to perform CJT-CSI measurements and / or reports as well as other types of CSI measurements and / or reports (e.g., non-CJT-CSI measurements and / or reports). While performing CJT-CSI measurements and / or reports as well as other types of CSI measurements and / or reports, the UE determines the CPU occupancy for each CPU in the CSI processing unit (CPU). In one implementation, if the UE is already using a CPU for non-CJT-CSI measurements and / or reports, the UE cannot use the CPU to perform CJT-CSI measurements and / or reports. Similarly, if the UE is already using a CPU for CJT-CSI measurements and / or reports, the UE cannot use the CPU to perform non-CJT-CSI measurements and / or reports.

[0161] In some implementations, the UE may measure 1330 and report 1340 CJT-CSI reports based on CMRs and associated IMRs, CPU occupancy rules, and minimum processing delays for CSI triggered by other CSI-reportConfigs and CJT-CSI. In some implementations, in the CJT-CSI report, the UE may report a CMR group index or multiple CSI-RS resource indices (CRIs) and corresponding CSI, such as RI / PMI / CQI / LI. The CMR group index identifies or indicates a specific CMR group in the configured CMR groups, and the UE obtains CSI from the CMRs and associated IMRs (if configured) in the specific CMR group. The CRI identifies or indicates a specific CMR and associated IMR (if configured) from which the UE obtains CSI.

[0162] Fig.14 is a diagram illustrating a method of transmitting a signal to a user equipment (UE) device (such as Fig.13 Flow chart of method 1400 for CJT-CSI reporting performed by UE device 102). Fig.15 is a depiction according to some embodiments of a network entity such as Fig.13 Flowchart of method 1500 for CJT-CSI reporting performed by gNB 104 of the gNB. The method 1500 performed by the network entity is complementary to the method 1400 performed by the UE device. According to various aspects of the present disclosure, unless otherwise stated, the RRC signaling may include an RRC reconfiguration message from the gNB to the UE, or a system information block (SIB), where the SIB may be an existing SIB (e.g., SIB1) or a new SIB (e.g., SIB J, J>21) transmitted by the gNB. In addition, the gNB may obtain UE capabilities via UE capability report signaling or from the core network (e.g., access and mobility management function (AMF)).

[0163] Further, in the present disclosure, the solutions described are based on 5G NR technology. It is understood that these solutions can also be applied to other wireless technologies such as 6G. "gNB" can be summarized as a base station or a radio access network (RAN) node.

[0164] exist Fig.14 In the method 1400, the UE capability (similar to Fig.13 The UE receives 1410 control signaling (similar to operation 1302) for a CSI framework for CJT-CSI measurement and reporting from a network entity. Fig.13 Operation 1310).

[0165] The UE receives 1412 a plurality of CMRs and / or IMRs and CJT-CSI trigger signaling (similar to Fig.13 The UE determines 1428 the CPU occupancy status and the processing delay (for comparing the processing delay to the scheduling offset, as discussed further below with respect to minimum processing delay).

[0166] If the CPU is available, the UE performs 1430 CJT-CSI measurement (similar to Fig.13 Based on the CJT-CSI measurement, the UE sends 1440 a CJT-CSI report to the network entity (similar to Fig.13 Operation 1340).

[0167] exist Fig.15 In the method 1500, after receiving the UE capabilities, the method 1500 begins by decoding 1504 the UE capabilities for CJT-CSI measurement and reporting. The network entity transmits 1510 to the UE device control signaling for the CSI framework for CJT-CSI measurement and reporting (similar to Fig.13 Operation 1310).

[0168] The network entity further transmits 1512 a plurality of CMRs and one or more IMRs to the UE device (similar to Fig.13 Operation 1312 of ). The network entity then receives and decodes 1550 the CJT-CSI report from the UE device.

[0169] In an embodiment, a UE may report its capabilities regarding the maximum number of TRPs it may support for CJT-CSI reporting, the maximum number of CMRs per CSI-reportConfig for CJT-CSI reporting, the maximum number of antenna ports per CMR for CJT-CSI reporting, the maximum number of total antenna ports across CMRs for CJT-CSI reporting, the maximum number of CMRs across CSI-reportConfig for CJT-CSI reporting, and / or the maximum number of CSI-reportConfig for CJT-CSI reporting. These numbers may be counted per component carrier (CC), per bandwidth part (BWP), per band, per band combination, and / or per UE.

[0170] In one embodiment, for CMR configuration for CJT-CSI measurement, the gNB may configure N CMR groups for CSI reporting, for example, by RRC signaling in CSI-reportConfig transmitted by the gNB to the UE, where N may be an integer greater than 0. Within CMR group k, the gNB may configure N TRP,k CMRs, where NTRP,k It can be an integer greater than 1. Each CMR in the CMR group corresponds to a TRP. In the CSI report, the UE can report the CMR group index and the corresponding RI / PMI / CQI / LI measured from the CMR. In one implementation, for the UE reporting the CMR group index k, the CSI can be measured from all CMRs in the CMR group. In another implementation, for the UE reporting the CMR group index k, the UE can report an indicator that reports the index of the measured CMR in the CMR group to report which CMR in the CMR group the CSI is measured from. In one implementation, if the gNB only activates or configures 1 CMR group for CSI reporting, the UE does not report the CMR group index.

[0171] In one implementation, for IMR configuration, the gNB may configure one ZP IMR and / or one NZP IMR associated with each CMR group through RRC signaling, such as RRC parameters in CSI-reportConfig, where CMR / IMR are associated in an N-to-one manner. The UE may measure interference based on the configured IMR and measure the channel based on the CMR configured with the CMR group. For such N-to-one CMR / IMR association operation, for UEs with multiple beams, such as those supporting quasi co-location (QCL) type (QCL with spatial Rx parameters) or in frequency range 2, the UE may receive IMRs based on multiple QCL-TypeD assumptions based on all CMRs in the CMR group. In an example, if the UE receives CMRs in a CMR group based on UE beams #1, #2, and #3, the UE receives IMRs based on beams #1, #2, and #3. Interference may be measured based on the average / maximum / minimum / total interference measured from the UE beams (or UE antenna ports).

[0172] Fig.16 An example of a CMR / IMR configuration 1601 and an associated CSI framework 1600 for CJT-CSI reporting according to some embodiments is shown. The example shows an example of a CSI framework 1600 for this implementation. In one example, in a CSI-ResourceConfig of a CMR configured for semi-persistent / periodic CJT-CSI reporting, in the CSI-ResourceConfig with N for resource set k TRP,kIn the case of N resources, the gNB can configure up to N resource sets in nzp-CSI-RS-ResourceSetList, and in the CSI-ResourceConfig of the IMR configured for semi-persistent / periodic CJT-CSI reporting, in the case of N resources, the gNB can configure one resource set in nzp-CSI-RS-ResourceSetList or csi-IM-ResourceSetList. In another example, for aperiodic CJT-CSI reporting, the gNB can configure up to N resourceSets in CSI-AssociatedReportConfigInfo for the gNB to select N CMR groups 1603.

[0173] The gNB may indicate the associated IMRs by indicating N csi-IM-ResourcesForInterference and nzp-CSI-RS-ResourcesForInterference in CSI-AssociatedReportConfigInfo, where each resource set for IMRs includes one IMR. In some embodiments, the gNB may indicate the associated IMRs by indicating one csi-IM-ResourcesForInterference and one nzp-CSI-RS-ResourcesForInterference in CSI-AssociatedReportConfigInfo, where each resource set for IMRs includes N IMRs. In some embodiments, for aperiodic CJT-CSI reporting, the gNB triggers all configured CMR sets and / or all configured IMR sets for the triggered CSI-ReportConfig, e.g., the UE ignores the RRC parameters resourceSet, nzp-CSI-RS-ResourceSetList, or csi-IM-ResourceSetList, or the gNB avoids configuring resourceSet, nzp-CSI-RS-ResourceSetList, or csi-IM-ResourceSetList. The gNB transmits one or more RRC messages (e.g., an RRCReconfiguration message or an RRCResume message) including these configurations to the UE.

[0174] In another implementation, for IMR configuration, the gNB may configure the N associated with the CMR in CMR group 1603 through RRC signaling, such as RRC parameters in CSI-reportConfig. TRP,kZP IMR 1607 and / or N TRP,k NZP-IMR 1609, where CMR / IMR are associated in a one-to-one manner. For such one-to-one CMR / IMR association operation, the UE may measure interference based on the minimum / average / maximum / total interference measured from the configured IMRs for the CMR group. For interference measurement from NZP-IMR, the gNB may configure an antenna combining factor for each NZP-IMR resource associated with a CMR in the CMR group. In one implementation, for NZP-IMR for CMR group k, the measured interference from subcarrier u may be calculated as ,in Indicates the antenna combining factor configured by the gNB for NZP IMR resource j, Indicates the estimated effective channel for subcarrier u from NZP-IMRj. In some embodiments, the antenna combining factors for NZP-IMR may be predefined.

[0175] Fig.17 An example of a CMR / IMR configuration 1701 and an associated CSI framework 1700 for CJT-CSI reporting according to some embodiments is shown. The example shows an example of a CSI framework 1700 for this implementation. In one example, in a CSI-ResourceConfig configured as CMR / IMR for semi-persistent / periodic CJT-CSI reporting, in the CSI-ResourceConfig with N for resource set k TRP,kIn the case of N resources, the gNB may configure N resource sets in nzp-CSI-RS-ResourceSetList or csi-IM-ResourceSetList. In another example, for aperiodic CJT-CSI reporting, the gNB may configure up to N resourceSets, csi-IM-ResourcesForInterference, nzp-CSI-RS-ResourcesForInterference in CSI-AssociatedReportConfigInfo for the gNB to select N CMR groups 1713 and the corresponding ZP-IMR 1707 and NZP-IMR 1709. In another example, for aperiodic CJT-CSI reporting, the gNB may configure up to N resourceSets in CSI-AssociatedReportConfigInfo for the gNB to select N CMR groups and associated ZP-IMR / NZP-IMR. In some embodiments, for aperiodic CJT-CSI reporting, the gNB triggers all configured CMR sets 1703 and / or all configured IMR sets 1707 and 1709 for the triggered CSI-ReportConfig, for example, the UE ignores the RRC parameters resourceSet, nzp-CSI-RS-ResourceSetList or csi-IM-ResourceSetList, or the gNB avoids configuring resourceSet, nzp-CSI-RS-ResourceSetList or csi-IM-ResourceSetList. The gNB transmits one or more RRC messages (e.g., RRCReconfiguration message or RRCResume message) including these configurations to the UE.

[0176] In another implementation, for IMR configuration, the gNB may configure one ZP IMR 1707 and / or N associated with CMR 1703 in CMR group 1713 through RRC signaling, such as RRC parameters in CSI-reportConfig 1701. TRP,k NZP IMRs 1709, where CMR and NZP-IMR are associated one-to-one. The UE behavior for interference measurement on ZP / NZP IMRs is based on the above implementations for N-to-one CMR / IMR association and one-to-one IMR / CMR association, respectively.

[0177] In another implementation, for IMR configuration, the gNB may configure one NZP IMR 1707 and / or NZP IMR 1707 associated with CMR 1703 in CMR group 1713 through RRC signaling such as RRC parameters in CSI-reportConfig 1701. TRP,k ZP IMRs 1709, where CMR and ZP-IMR are associated one-to-one. The UE behavior for interference measurement on NZP / ZP IMR is based on the above implementations for N-to-one CMR / IMR association and one-to-one IMR / CMR association, respectively.

[0178] In another embodiment, for CMR configuration for CJT-CSI measurement, the gNB may configure N for CSI reporting through RRC signaling, for example, in CSI-reportConfig. TRP CMR groups 1713, of which N TRP It can be an integer greater than 1. Within CMR group k, the gNB can configure M k CMR, of which M k It can be an integer greater than 0. Each CMR group corresponds to a TRP. In the CSI report, the UE can report 1 or more CRIs, and the corresponding RI / PMI / CQI / LI measured from the CMR, where reporting 1 CRI indicates that the CSI is measured from a single TRP, and reporting more than 1 CRI indicates that the CSI is measured from multiple TRPs. In one implementation, the CRIs can be counted across CMR groups 1713. In another implementation, the CRIs can be counted within a CMR group, and then the UE can report the CMR group index in addition to each reported CRI. The number of reported CRIs associated with RI / PMI / CQI / LI can be, for example, predefined based on the number of CMR groups 1713, or configured by the gNB through RRC signaling in CSI-reportConfig or MAC CE, or reported by the UE in the CSI report. In one example, the UE can report the selected CMR group index in the CSI report. The number of reported CRIs may then be the same as the number of selected CMR group indices. For CSI reported in long PUCCH or PUSCH, the selected CMR group indices may be reported in CSI part 1. The CSI reported in CSI part 2 may then be reported based on the reported CMR group indices in CSI part 1.

[0179] In an implementation, for IMR configuration, the gNB may configure the IMR associated with CMR 1703 in CMR group 1713 through RRC signaling, such as RRC parameters in CSI-reportConfig1701.k ZP IMR 1707 and / or M k NZP-IMR 1709, where CMR / IMR are associated in a one-to-one manner. For such one-to-one CMR / IMR association operation, the UE may measure interference based on the minimum / average / maximum / total interference measured from the configured IMRs associated with the CMRs indicated by the reported CRI. For interference measurements from NZP-IMR 1709, the gNB may configure an antenna combining factor for each NZP-IMR resource associated with a CMR in a CMR group. In one implementation, for NZP-IMR for CMR group k, the measured interference from subcarrier u may be calculated as ,in Indicates the antenna combining factor configured by the gNB for NZP IMR resource j, Indicates the estimated effective channel for subcarrier u from NZP-IMRj. In some embodiments, the antenna combining factors for NZP-IMR may be predefined.

[0180] Fig.18 An example of a CMR / IMR configuration 1801 and an associated CSI framework 1800 for CJT-CSI reporting according to some embodiments is shown. The example shows an example of a CSI framework 1800 for this implementation. In one example, in a CSI-ResourceConfig configured as CMR / IMR for semi-persistent / periodic CJT-CSI reporting, in the CSI-ResourceConfig with M for resource set k k In the case of multiple resources, the gNB can configure N in nzp-CSI-RS-ResourceSetList or csi-IM-ResourceSetList. TRP In another example, for aperiodic CJT-CSI reporting, the gNB may configure up to N resource sets in CSI-AssociatedReportConfigInfo. TRP resourceSet, csi-IM-ResourcesForInterference and nzp-CSI-RS-ResourcesForInterference for gNB to select N TRPCMR groups 1813 and corresponding ZP-IMR 1807 and NZP-IMR 1809. In some embodiments, for aperiodic CJT-CSI reporting, the gNB triggers all configured CMR sets and / or all configured IMR sets for the triggered CSI-ReportConfig 1801, for example, the UE ignores the RRC parameters resourceSet, nzp-CSI-RS-ResourceSetList or csi-IM-ResourceSetList, or the gNB avoids configuring resourceSet, nzp-CSI-RS-ResourceSetList or csi-IM -ResourceSetList. The gNB transmits one or more RRC messages (e.g., RRCReconfiguration message or RRCResume message) including these configurations to the UE.

[0181] In another implementation, the gNB may configure one ZP-IMR and / or one NZP-IMR associated with the CMR 1803 corresponding to the CRI combination. Then, the IMR and the CMR corresponding to the CRI combination may be associated in an N-to-one manner. The interference measurement operation in the above embodiment for N-to-one CMR / IMR association may be applied.

[0182] In another implementation, the gNB may configure a one-to-one association for CMR 1803 and ZP-IMR 1807, and an N-to-one association for CMR 1803 and NZP-IMR 1809.

[0183] In another implementation, the gNB may configure a one-to-one association for CMR 1803 and NZP-IMR 1809, and an N-to-one association for CMR 1803 and ZP-IMR 1807.

[0184] In an embodiment, regarding dynamic TRP selection, the gNB may dynamically select TRP based on beam quality reports such as layer 1 reference signal received power (L1-RSRP) or layer 1 signal to interference plus noise (L1-SINR). The gNB may dynamically activate or deactivate some CMR groups 1813 or CSI-reportConfig 1801 through MAC CE or through DCI. The MAC CE may include at least one of the following elements: • Serving cell index, which is used to indicate the serving cell index for CSI-reportConfig • Bandwidth Part Index, which is used to indicate the bandwidth part index used for CSI-reportConfig • CSI report index, which is used to indicate the CSI-reportConfigId used for the CSI-reportConfig • Active CMR Group Index, which may be a bitmap indicating the CMR group index to be activated • Transmission Configuration Status (TCI) Index for the active CMR, which can be used to indicate the beam / quasi co-location information for the active CMR

[0185] In some implementations, the gNB and the UE may determine that the IMR shares the same activation / deactivation state as the associated CMR or CMR group.

[0186] For dynamic activation or triggering based on DCI, the gNB may configure candidate CMR group indices for the triggered CSI-reportConfig corresponding to the CSI triggering status configured by CSI-AssociatedReportConfigInfo. The gNB may then dynamically activate the CMR group indices for CJT-CSI measurement and reporting by triggering the UE to send CJT-CSI reports by indicating the CSI triggering status in the DCI field CSI request in DCI (e.g., DCI 0_1).

[0187] Fig.19 An example of an aperiodic CSI trigger state configuration 1900 according to some embodiments is shown. An example implementation of N CMR sets and 1 IMR set on ASN.1 for aperiodic CSI reporting is as follows:

[0188] An example implementation of N CMR sets and N IMR sets over ASN.1 for aperiodic CSI reporting is as follows:

[0189] In some implementations, the gNB may include one or more CSI-AssociatedResourceConfigInfo-r18 IEs in the CSI-AperiodicTriggerStateList-r18 IE, include the CSI-AperiodicTriggerStateList-r18 IE in the CSI-MeasConfig IE, and transmit an RRC message including the CSI-MeasConfig IE to the UE. Thus, the UE may perform CJT-CSI measurement and reporting for aperiodic CJT-CSI reporting according to the CMR set and one or more IMRs configured in the CSI-AssociatedResourceConfigInfo-r18 IE.

[0190] To configure CJT-CSI measurement and reporting, the gNB may transmit to the UE the CSI configuration parameters: aperiodicTriggerStateList(-r18) (e.g., a list of CSI trigger states), csi-ReportConfigtoAddModList (e.g., a list of CSI-ReportConfig IEs), csi-ResourceConfigToAddModList, and nzp-CSI-RS-ResourceToAddModList. aperiodicTriggerStateList(-r18) applies only to aperiodic CSI reporting. For periodic and semi-persistent CSI reporting, the UE follows the configuration in each CSI-ReportConfig. In some implementations, the gNB transmits to the UE at least one RRC message (e.g., an RRCReconfiguration message and / or an RRCResume message) including the CSI configuration parameters.

[0191] In some implementations, each of the at least one CSI-ReportConfig IE in csi-ReportConfigtoAddModList includes a list of CSI resource group configurations configuring the CMR group, as shown below. The following example implementations may be applied to periodic, semi-persistent, and aperiodic CJT-CSI reporting. Example implementation of CSI-ReportConfig IE 1

[0192] As shown in example implementation 1, the gNB may configure N CMR groups and / or N IMR groups by including csi-ResourcesGroupConfigList-r18 including CSI-ResouresGroupConfig IE 1, ..., N in the CSI-ReportConfig IE. That is, CSI-ResouresGroupConfig IE 1, ..., N corresponds to CMR groups 1, ..., N. In one implementation, the gNB and the UE determine CSI-ResouresGroupConfig IE 1, ..., N with indexes 1, ..., N, respectively, according to the order of CSI-ResouresGroupConfig IE 1, ..., N in csi-ResourcesGroupConfigList-r18. With this implementation, the gNB and the UE may ignore or discard resourcesForChannelMeasurement, csi-IM-ResourcesForInterference, and nzp-CSI-RS-ResourcesForInterference. Example implementation of CSI-ReportConfig IE 2

[0193] As shown in example implementation 2, the gNB may configure N-1 CMR groups and / or N-1 IMR groups by including CSI-resourcegroupconfigList-r18 including CSI-resourcegroupconfig-r18 IE 2, ..., N in the CSI-ReportConfig IE. That is, CSI-ResouresGroupConfig IE 1, ..., N corresponds to CMR groups 2, ..., N. In one implementation, the gNB and the UE determine CSI-ResouresGroupConfig IE 2, ..., N with indices 2, ..., N, respectively, according to the order of CSI-ResouresGroupConfig IE 2, ..., N in csi-ResourcesGroupConfigList-r18. With this implementation, the gNB and the UE may determine resourcesForChannelMeasurement, csi-IM-ResourcesForInterference, and nzp-CSI-RS-ResourcesForInterference as CMR group 1 with index 1.

[0194] With either of example implementations 1 and 2, the gNB may include one or more CSI-ReportConfig IEs in the csi-ReportConfigToAddModList, include the csi-ReportConfigToAddModList in the CSI-MeasConfig IE, and transmit the csi-ReportConfigToAddModList to the UE. Thus, the UE may perform CJT-CSI measurement and reporting according to the CSI-ReportConfig IE. Example implementation of CSI-ReportConfig IE 3

[0195] As shown in example implementation 3, the gNB may configure N CMR groups and / or N IMR groups by including a csi-ResourcesGroupConfigList-r18 including CSI-ResouresGroupConfig IEs 1, ..., N in the CSI-ReportConfig-r18 IE. That is, the CSI-ResouresGroupConfig IEs 1, ..., N correspond to CMR groups 1, ..., N. In one implementation, the gNB and the UE determine the CSI-ResouresGroupConfig IEs 1, ..., N with indexes 1, ..., N, respectively, according to the order of the CSI-ResouresGroupConfig IEs 1, ..., N in the csi-ResourcesGroupConfigList-r18.

[0196] In some implementations, the gNB may include one or more CSI-ReportConfig-r18 IEs in the csi-ReportConfigToAddModList-r18, include csi-ReportConfigToAddModList-r18 in the CSI-MeasConfig IE, and transmit the RRC message including the CSI-MeasConfig IE to the UE. Thus, the UE may perform CJT-CSI measurement and reporting according to the CMR set and one or more IMRs configured in the CSI-ReportConfig-r18 IE.

[0197] In some implementations, IEs with the suffix "-r18" may be replaced with "v18xy", where "x" and "y" may be integers. Note that the field or IE names described above are used to describe the disclosed content, and the field or IE names may be changed to similar content. "CMR group" and "CRM set" may be interchangeable. "IMR group" and "IRM set" may be interchangeable.

[0198] In an embodiment, for each TRP used for CJT-CSI reporting, the gNB may provide a common codebook configuration to the UE via RRC signaling, such as codebookConfig.

[0199] In another embodiment, for each TRP for CJT-CSI reporting, the gNB may provide a separate codebook configuration to the UE via RRC signaling. In one implementation, a list of codebook configurations may be provided, where each codebook configuration may correspond to each TRP. In another implementation, a common RRC signaling codebookConfig may be provided, but within this RRC structure, the gNB may configure a list of some parameters in codebookConfig to provide some configurations separately for the TRP, such as numberOfPMI-SubbandsPerCQI-SubbandList, paramCombinationList, etc.

[0200] In an embodiment, to reduce UE memory for signal buffering, the gNB may avoid configuring different periodicities or different periodicities and offsets for periodic / semi-persistent CSI-RS from different TRPs configured for CJT-CSI measurement, where the periodicity and offset are configured via RRC signaling periodityAndOffset. In some embodiments, the UE may report its capability regarding whether it supports CJT-CSI measurement for periodic / semi-persistent CSI-RS from different TRPs configured with different periodicities and / or offsets. The UE may further report its capability regarding the number of different periodicities and / or offsets it can support, where this number may be lower than the maximum number of TRPs for CJT operation (e.g., 4).

[0201] In addition, considering the automatic gain control (AGC) impact of the UE, the gNB transmits the CSI-RS for CJT-CSI measurement within a slot or S consecutive slots, where S can be predefined or reported from the UE to the gNB through the UE capability. Therefore, a common AGC factor can be applied to all CSI-RS.

[0202] In an embodiment, to reduce UE complexity for CSI measurement, for wideband and / or subband CJT-CSI reporting, the gNB may avoid configuring different physical resource blocks (PRBs) for CSI-RS from different TRPs configured for CJT-CSI measurement, where the PRBs for CSI-RS are configured through RRC signaling frequencyDomainAllocation. In some embodiments, the UE may report its capability regarding whether it supports CJT-CSI measurement for CSI-RS with different PRBs. The UE may further report its capability regarding the number of different PRBs it can support, where this number may be lower than the maximum number of TRPs for CJT operation (e.g., 4). In some embodiments, if the PRBs for the CSI-RS for CJT-CSI measurement are configured to be different, the UE may measure CJT-CSI for a common PRB among the CSI-RS.

[0203] In an embodiment, the gNB may configure the energy per resource element (EPRE) ratio between PDSCH and CSI-RS from the same TRP through RRC signaling, such as in NZP-CSI-RS-Resource, or higher layer signaling in MAC CE or DCI. In one example, for semi-persistent CSI-RS, the EPRE ratio may be configured through MAC CE for semi-persistent CSI-RS activation. In another example, for aperiodic CSI-RS, different EPRE ratios may be associated with different CSI triggering states, and the gNB may indicate different CSI triggering states by indicating different values ​​of CSI request in DCI.

[0204] For antenna combination weight selection for CSI measurement for CJT, the UE may construct a combined channel from all configured TRPs based on the estimated channel and power offset. In one example, for CJT from 4 TRPs, the channel may be constructed as ,in Indicates the power scaling factor for TRPj. This power scaling factor can be determined based on the EPRE ratio between CSI-RS and PDSCH. CPU usage rules and minimum processing delay

[0205] If the gNB's scheduling results in the number of occupied CPUs exceeding the maximum number of CPUs reported by the UE in the UE capabilities, or the scheduling offset is less than the minimum processing delay for CSI reporting, the UE may ignore or discard the DCI to trigger CSI reporting or report outdated CSI. In some embodiments, the UE may assume or determine that such scheduling is an error condition.

[0206] In an embodiment, Fig.16 and Fig.17 In that case, for CMR grouping scheme 1, for example, CMRs in a group correspond to different TRPs, for such CSI-reportConfig, the number of CPUs may be predefined or determined based on the number of CMR groups and / or the number of CMRs within each group.

[0207] In implementation, the gNB and UE may assume This CPU occupation rule assumes that one CPU is occupied for the UE to measure the precoder for one TRP, and the other CPU is used to measure the cross-TRP antenna combining factor and other CSI information for each group.

[0208] In another implementation, the gNB and the UE may assume This CPU occupation rule assumes that one CPU is occupied for the UE to measure the precoder for one TRP, and one CPU in the CPU used for per-TRP precoder search can be used to measure the cross-TRP antenna combining factor and other CSI information for each group.

[0209] In another implementation, the gNB and the UE may assume CPUs can be occupied, where S indicates the maximum number of different CMRs in CSI-reportConfig. This CPU occupation rule assumes that one CPU is occupied for the UE to measure the precoder for one TRP, where the UE only calculates the overlapping CMR once, and the other CPU is used to measure the cross-TRP antenna combining factor and other CSI information for each group.

[0210] In another implementation, the gNB and the UE may assume CPUs can be occupied, where S indicates the maximum number of different CMRs in CSI-reportConfig. This CPU occupation rule assumes that one CPU is occupied for the UE to measure the precoder for one TRP, where the UE only calculates the overlapping CMR once, and one of the CPUs used for per-TRP precoder search can be used to measure the cross-TRP antenna combining factor and other CSI information for each group.

[0211] In another implementation, the gNB and the UE may assume This CPU occupation rule assumes that one CPU is occupied for each CMR group and parallel processing is not enabled within the CMR group.

[0212] In another implementation, the gNB and UE may assume that 1 CPU can be occupied. This CPU occupancy rule assumes that parallel processing is not applied.

[0213] In another embodiment, if Fig.18 In that case, for CMR grouping scheme 2, for example, CMRs in a group correspond to one TRP, for such CSI-reportConfig, the number of CPUs may be predefined or determined based on the number of CMRs per group.

[0214] In implementation, the gNB and UE may assume This CPU occupation rule assumes that one CPU is occupied for the UE to measure the precoder for one TRP, and the other CPU is used to measure the cross-TRP antenna combining factor and other CSI information for each group.

[0215] In another implementation, the gNB and the UE may assume This CPU occupation rule assumes that one CPU is occupied for the UE to measure the precoder for one TRP, and one CPU in the CPU used for per-TRP precoder search can be used to measure the cross-TRP antenna combining factor and other CSI information for each group.

[0216] In another implementation, the gNB and the UE may assume This CPU occupation rule assumes that one CPU is occupied for CRI combination processing, and in case of CRI combination, parallel processing is not enabled.

[0217] In another implementation, the gNB and UE may assume that 1 CPU can be occupied. This CPU occupancy rule assumes that parallel processing is not applied.

[0218] In an embodiment, the minimum processing delay for CJT-CSI reporting may be predefined.

[0219] In one implementation, the minimum processing delay for CJT-CSI reporting may be the same as Type 2 CSI reporting. In one example, it may be (Z2, Z2') as defined in Section 5.4 of 3GPP TS 38.214.

[0220] In another implementation, the minimum processing delay is determined based on the maximum number of TRPs configured for CJT-CSI reporting and the minimum processing delay for Type 2 CSI reporting. The maximum number of TRPs configured for CJT-CSI reporting may refer to the maximum number of CMR groups associated with CJT-CSI reporting or the maximum number of CMRs in a CMR group. In one example, it may be (r*N TRP *Z2, r*N TRP *Z2'), where r can be in the range of (0, 1), which can be predefined or configured through RRC signaling from the gNB, or reported by the UE capability.

[0221] In another embodiment, the UE may report its capability of minimum processing delay (Z, Z') for CJT-CSI reporting.

[0222] In one implementation, the UE may report multiple pairs of (Z, Z') for different numbers of TRPs. For example, a UE supporting CJT for up to 4 TRPs may report 3 pairs of (Z, Z') for CJT based on 2TRPs, 3TRPs, and 4TRPs, respectively.

[0223] In another implementation, the UE may report a pair of (Z, Z') regardless of the number of TRPs used for CJT, and the UE capability is applicable to CJT-CSI reporting with different numbers of TRPs.

[0224] In another implementation, under the assumption of a number of TRPs (e.g., 2 TRPs), the UE may report a pair of (Z, Z'). For CJT-CSI with a different number of TRPs, a minimum processing delay may be determined based on the number of TRPs and the reported (Z, Z'), for example, the minimum processing delay may be determined as (ceil(X / 2)*Z, ceil(X / 2)*Z'), where X indicates the number of TRPs configured in the CSI report. In some cases, X indicates the number of CMR groups associated with the CJT-CSI report or the number of CMRs in a CMR group.

[0225] Unless otherwise specifically noted, terms such as "establishing", "receiving", "transmitting" refer to actions and processes performed or implemented by a computing device that manipulate data represented as physical (electronic) quantities within registers and memories of the computing device into other data similarly represented as physical quantities within the computing device memory or registers or other such information storage, transmission or display devices. In addition, the terms "first", "second", "third", "fourth", etc. as used herein are intended as labels to distinguish different elements and may not necessarily have ordinal meanings according to their numerical designations.

[0226] The examples described herein also relate to an apparatus for performing the operations described herein. This apparatus may be specially constructed for the desired purpose, or the apparatus may include a general-purpose computing device selectively programmed by a computer program stored in the computing device. Such a computer program may be stored in a computer-readable non-transitory storage medium.

[0227] The methods and illustrative examples described herein are not inherently related to any particular computer or other device. Various general purpose systems may be used according to the teachings described herein, or more specialized devices may be conveniently constructed to perform the required method steps. The required structures of a variety of these systems will be presented as described above.

[0228] The above description is intended to be illustrative rather than restrictive. Although the present disclosure has been described with reference to specific illustrative examples, it will be appreciated that the present disclosure is not limited to the described examples. The scope of the present disclosure can be determined with reference to the following claims and the full scope of equivalents to which the claims are authorized.

[0229] As used herein, the singular forms "a", "an", "said", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should be further understood that the terms "include", "comprises", and / or "contains" when used herein specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. Therefore, the terms used herein are for the purpose of describing specific embodiments only and are not intended to be limiting.

[0230] It can also be noted that in some alternative implementations, the functions / behaviors noted may not occur in the order noted in the figures. For example, two figures shown in succession may actually be executed substantially simultaneously or may sometimes be executed in reverse order, depending on the functionality / actions involved.

[0231] Although the method operations are described in a particular order, it should be understood that other operations may be performed between the described operations, that the described operations may be adjusted so that they occur at slightly different times, or that the described operations may be distributed in a system that allows the processing operations to occur at various intervals associated with the process.

[0232] Various units, circuits, or other components may be described or claimed as being "configured to" or "configurable to" perform one or more tasks. In such contexts, the phrases "configured to" or "configurable to" are used to represent a structure by indicating that a unit / circuit / component includes a structure (e.g., a circuit system) that performs one or more tasks during operation. Thus, even if a specified unit / circuit / component is not currently operating (e.g., not turned on), it can be said that the unit / circuit / component is configured to perform a task, or is configurable to perform a task. Units / circuits / components used with the "configured to" or "configurable to" language include hardware - e.g., circuits, memory storing program instructions executable to implement operations, etc. The recitation that a unit / circuit / component is "configured to" perform one or more tasks, or "configurable to" perform one or more tasks is expressly intended not to invoke the sixth paragraph of 35 USC §112 with respect to that unit / circuit / component. Additionally, "configured to" or "configurable to" may include general structures (e.g., general circuitry) manipulated by software and / or firmware (e.g., an FPGA or a general purpose processor executing software) to operate in a manner capable of performing the tasks in question. "Configured to" may also include adjusting a manufacturing process (e.g., a semiconductor manufacturing facility) to manufacture a device (e.g., an integrated circuit) suitable for implementing or performing one or more tasks. "Configurable to" is expressly intended not to apply to blank media, an unprogrammed processor or an unprogrammed general purpose computer, or an unprogrammed programmable logic device, programmable gate array, or other unprogrammed device, unless accompanied by a programming medium that imparts the unprogrammed device with the ability to be configured to perform the disclosed functionality.

[0233] For the purpose of explanation, the above description has been described with reference to specific embodiments. However, the above illustrative discussion is not intended to be exhaustive or to limit the disclosure to the precise form disclosed. Many modifications and variations are possible in view of the above teachings. The embodiments are selected and described in order to best explain the principles of the embodiments and their practical application, so that those skilled in the art can best utilize the embodiments and various modifications that may be suitable for the intended specific use. Therefore, the present embodiments are to be considered illustrative and not restrictive, and the disclosure is not to be limited to the details given herein, but may be modified within the scope and equivalents of the appended claims. Example UE Example

[0234] Example 1 is a device comprising a processor configured to cause a user equipment (UE): a. transmitting to the base station an indication of one or more capabilities supporting coherent joint transmission-based channel state information (CJT-CSI) reporting; b. Decoding control signaling of a channel state information (CSI) reporting configuration for a CJT-CSI report, the CSI reporting configuration having more than one configured channel measurement resource (CMR) and at least one interference measurement resource (IMR) associated with at least one CMR; c. Measuring CJT-CSI based on more than one configured channel measurement resource (CMR) and at least one interference measurement resource (IMR); d. Transmitting a CJT-CSI report including indices corresponding to the plurality of CMRs and corresponding CJT-CSI to the base station.

[0235] Example 2 is a device according to Example 1, wherein the UE may report its capabilities regarding: the maximum number of transmission reception points (TRPs) for CJT-CSI reporting, the maximum number of CMRs per CJT-CSI reporting, the maximum number of antenna ports for each CMR for CJT-CSI reporting, the maximum number of total antenna ports across CMRs for CJT-CSI reporting, the maximum number of CMRs across CJT-CSI reporting, and / or the maximum number of CJT-CSI reports.

[0236] Example 3 is a device according to Example 1, wherein N CMR groups for CJT-CSI reporting can be configured through RRC signaling, where N can be an integer greater than 0.

[0237] Example 4 is the apparatus of Example 3, wherein within a CMR group k, N from different TRPs may be configured. TRP,k CMRs, where N TRP,k It can be an integer greater than 1.

[0238] Example 5 is a device according to Example 3, wherein, in the CSI report, the UE may report the CMR group index and other CSI information measured from the CMR group.

[0239] Example 6 is a device according to Example 3, wherein the other CSI information can be at least one of a rank indicator (RI), a precoder matrix indicator (PMI), a channel quality indicator (CQI), and a layer indicator (LI).

[0240] Example 7 is a device according to Example 5, wherein zero power IMR (ZP-IMR) and non-zero power IMR (NZP-IMR) can be configured in the CJT-CSI report.

[0241] Example 8 is the apparatus of Example 5, wherein the ZP-IMR and / or the NZP-IMR may be associated with the CMR.

[0242] Example 9 is an apparatus according to Example 8, wherein interference for the CMR group may be measured based on average / minimum / maximum / total interference measured from each associated ZP-IMR and / or NZP-IMR.

[0243] Example 10 is the apparatus of Example 5, wherein the ZP-IMR and / or the NZP-IMR may be associated with a CMR group.

[0244] Example 11 is the apparatus of Example 10, wherein the UE may receive the associated ZP-IMR and / or NZP-IMR using a spatial receive filter for receiving CMRs in the CMR group.

[0245] Example 12 is a device according to Example 3, wherein the number of CSI processing units (CPUs) used for CJT-CSI reporting can be predefined or determined based on the number of CMR groups and / or the number of CMRs within each group.

[0246] Example 13 is an apparatus according to Example 1, wherein the UE can decode the RRC signaling to configure N for CSI reporting. TRP CMR groups, where N TRP It can be an integer greater than 1.

[0247] Example 14 is the apparatus of Example 13, wherein within CMR group k, the gNB may configure M k CMR, of which M k It can be an integer greater than 0.

[0248] Example 15 is an apparatus according to Example 13, wherein zero power IMR (ZP-IMR) and non-zero power IMR (NZP-IMR) can be configured in the CJT-CSI report.

[0249] Example 16 is a device according to Example 15, wherein the UE may report more than one CSI-RS resource indicator (CRI) associated with other CSI information in the CJT-CSI report.

[0250] Example 17 is a device according to Example 16, wherein the other CSI information can be at least one of a rank indicator (RI), a precoder matrix indicator (PMI), a channel quality indicator (CQI), and a layer indicator (LI).

[0251] Example 18 is the apparatus of Example 15, wherein the ZP-IMR and / or the NZP-IMR may be associated with the CMR.

[0252] Example 19 is a device according to Example 15, wherein the interference for the CMR associated with the reported CRI can be measured based on the average / minimum / maximum / total interference measured from each associated ZP-IMR and / or NZP-IMR.

[0253] Example 20 is a device according to Example 15, wherein interference for a CMR associated with the reported CRI may be measured based on average / minimum / maximum / total interference measured from each associated ZP-IMR and / or NZP-IMR.

[0254] Example 21 is the apparatus of Example 13, wherein the number of CPUs may be predefined or determined based on the number of CMRs per group.

[0255] Example 22 is an apparatus according to Example 3 and Example 13, wherein the CMR group or CJT-CSI report can be dynamically activated or deactivated through the MAC CE.

[0256] Example 23 is an apparatus according to Example 3 and Example 13, wherein the CMR group or CJT-CSI report can be dynamically activated or deactivated through DCI.

[0257] Example 24 is a device according to Example 1, wherein a common codebook for each TRP can be configured through RRC signaling.

[0258] Example 25 is a device according to Example 1, wherein the separate codebook configuration of the TRP for CJT can be configured through RRC signaling.

[0259] Example 26 is a device according to Example 1, wherein a common periodicity or periodicity and offset for periodic / semi-persistent CSI-RS from different TRPs for CJT-CSI measurement can be configured through RRC signaling.

[0260] Example 27 is a device according to Example 1, wherein the UE receives CSI-RS from different TRPs for CJT-CSI measurement within a time slot or within N time slots.

[0261] Example 28 is a device according to Example 1, wherein N is an integer greater than 1 and can be predefined or reported through UE capabilities.

[0262] Example 29 is a device according to Example 1, wherein CSI-RS from different TRPs for CJT-CSI reporting can be configured with a common physical resource block (PRB).

[0263] Example 30 is a device according to Example 1, wherein the UE measures CJT CSI in a common PRB among CSI-RS from different TRPs used for CJT-CSI reporting.

[0264] Example 31 is a device according to Example 1, wherein the energy per resource element (EPRE) ratio between PDSCH and CSI-RS from the same TRP can be configured via RRC signaling, MAC CE, or DCI.

[0265] Example 32 is a device according to Example 1, wherein the minimum processing delay for CJT-CSI reporting can be predefined or reported through UE capability signaling.

[0266] Example 33 is a device according to Example 1, wherein if the number of occupied CPUs exceeds the maximum number of CPUs reported by the UE in the UE capabilities, or the scheduling offset is less than the minimum processing delay for CJT-CSI reporting, the UE may ignore the DCI to trigger CJT-CSI reporting or report outdated CJT-CSI. BS Example

[0267] Example 1 is a device comprising a processor configured to cause a base station (BS): a. One or more capabilities of receiving an indication from the UE, another base station or the core network of the UE based on coherent joint transmission channel state information (CJT-CSI) report; b. Control signaling of a channel state information (CSI) reporting configuration for CJT-CSI reporting to the UE based on the one or more capabilities, the CSI reporting configuration having more than one configured channel measurement resources (CMRs) and at least one interference measurement resource (IMR) associated with at least one CMR; c. Transmitting to the UE a downlink reference signal configured for CMR and IMR for CJT-CSI reporting; d. Receive CJT-CSI report from UE; e. Decoding a CJT-CSI report indicating indices corresponding to a plurality of CMRs and corresponding CJT-CSI.

[0268] Example 2 is a device according to Example 1, wherein the BS can decode UE capabilities regarding: the maximum number of transmission reception points (TRPs) for CJT-CSI reporting, the maximum number of CMRs per CJT-CSI reporting, the maximum number of antenna ports for each CMR for CJT-CSI reporting, the maximum number of total antenna ports across CMRs for CJT-CSI reporting, the maximum number of CMRs across CJT-CSI reporting, and / or the maximum number of CJT-CSI reports.

[0269] Example 3 is a device according to Example 1, wherein the BS may configure N CMR groups for CJT-CSI reporting through RRC signaling, where N may be an integer greater than 0.

[0270] Example 4 is the apparatus of Example 3, wherein within CMR group k, the gNB may configure N from different TRPs. TRP,k CMRs, where N TRP,k It can be an integer greater than 1.

[0271] Example 5 is a device according to Example 3, wherein, in the CSI report, the gNB can receive the CMR group index and other CSI information measured from the CMR group in the CJT-CSI.

[0272] Example 6 is a device according to Example 5, wherein the other CSI information can be at least one of a rank indicator (RI), a precoder matrix indicator (PMI), a channel quality indicator (CQI), and a layer indicator (LI).

[0273] Example 7 is a device according to Example 5, wherein the BS can configure at least one zero power IMR (ZP-IMR) and / or non-zero power IMR (NZP-IMR) in the CJT-CSI reporting configuration.

[0274] Example 8 is the apparatus of Example 7, wherein the ZP-IMR and / or the NZP-IMR may be associated with the CMR.

[0275] Example 9 is the apparatus of Example 7, wherein the ZP-IMR and / or the NZP-IMR may be associated with a CMR group.

[0276] Example 10 is a device according to Example 3, wherein the number of CSI processing units (CPUs) used for CJT-CSI reporting can be predefined or determined based on the number of CMR groups and / or the number of CMRs within each group.

[0277] Example 11 is the apparatus of Example 1, wherein the BS may configure N for CSI reporting through RRC signaling.TRP CMR groups, where N TRP It can be an integer greater than 1.

[0278] Example 12 is the apparatus of Example 11, wherein within CMR group k, the gNB may configure M k CMR, of which M k It can be an integer greater than 0.

[0279] Example 13 is a device according to Example 11, wherein the BS can configure at least one zero power IMR (ZP-IMR) and / or non-zero power IMR (NZP-IMR) in the CJT-CSI reporting configuration.

[0280] Example 14 is an apparatus according to Example 11, wherein the BS may receive more than one CSI-RS resource indicator (CRI) associated with other CSI information in the CJT-CSI report.

[0281] Example 15 is a device according to Example 14, wherein the other CSI information can be at least one of a rank indicator (RI), a precoder matrix indicator (PMI), a channel quality indicator (CQI), and a layer indicator (LI).

[0282] Example 16 is the apparatus of Example 11, wherein the ZP-IMR and / or the NZP-IMR may be associated with the CMR.

[0283] Example 17 is the apparatus of Example 11, wherein the number of CPUs may be predefined or determined based on the number of CMRs for each group.

[0284] Example 18 is the apparatus of Example 3 and Example 11, wherein the CMR group or CJT-CSI report may be dynamically activated or deactivated via the MAC CE.

[0285] Example 19 is a device according to Example 3 and Example 11, wherein the CMR group or CJT-CSI report can be dynamically activated or deactivated through DCI.

[0286] Example 20 is a device according to Example 1, wherein a common codebook for each TRP can be configured through RRC signaling.

[0287] Example 21 is a device according to Example 1, wherein the separate codebook configuration of the TRP for CJT can be configured through RRC signaling.

[0288] Example 22 is a device according to Example 1, wherein a common periodicity or periodicity and offset for periodic / semi-persistent CSI-RS from different TRPs for CJT-CSI measurement can be configured through RRC signaling.

[0289] Example 23 is an apparatus according to Example 1, wherein the BS transmits CSI-RS from different TRPs for CJT-CSI measurement within a time slot or within N time slots.

[0290] Example 24 is a device according to Example 1, wherein N is an integer greater than 1 and can be predefined or the gNB can decode UE capabilities regarding supported N values.

[0291] Example 25 is a device according to Example 1, wherein the BS can transmit CSI-RS with common physical resource blocks (PRBs) from different TRPs for CJT-CSI reporting.

[0292] Example 26 is a device according to Example 1, wherein the energy per resource element (EPRE) ratio between PDSCH and CSI-RS from the same TRP can be configured via RRC signaling, MAC CE, or DCI.

[0293] Example 27 is a device according to Example 1, wherein the minimum processing delay for CJT-CSI reporting can be predefined, or the BS can decode the minimum processing delay for CJT-CSI from UE capability signaling.

[0294] Example 28 is an apparatus according to Example 1, wherein the BS may avoid decoding the CJT-CSI report if the number of occupied CPUs exceeds the maximum number of CPUs or the scheduling offset is less than the minimum processing delay for the CJT-CSI report.

Claims

1. A method for wireless communication performed by a user equipment (UE), the method comprising: receiving, from a network entity, a configuration message for configuring a channel state information (CSI) report based on a plurality of channel measurement resources (CMRs); The UE device performs measurement of the multiple CMRs and at least one interference measurement resource IMR in one time slot or two consecutive time slots according to the configuration message; as well as The CSI report is transmitted to the network entity based on the measurements of the plurality of CMRs and the at least one IMR.

2. The method according to claim 1, further comprising: An indication of an ability to report the CSI report based on the plurality of CMRs is transmitted to the network entity.

3. The method of claim 1 , wherein the CSI report is based on at least one of: Occupancy rules for a CSI processing unit CPU; or A processing delay for the CSI report. The method of claim 3 , wherein the occupancy rule comprises determining the number of CPUs based on the number of the plurality of CMRs.

5. The method of claim 3, further comprising transmitting to the network entity UE capabilities for minimum processing delay of the CSI report.

6. The method according to any one of claims 1 to 3, wherein the plurality of CMRs comprises: A plurality of non-zero power NZP CSI reference signal CSI-RS resources, each of the plurality of NZP CSI-RS resources corresponding to one TRP of a plurality of transmission / reception points TRPs.

7. The method according to claim 6, further comprising: A CSI-RS within the same resource block (RB) is received from the network entity.

8. The method according to claim 6, further comprising: A common codebook configuration for the CSI report for each of the plurality of TRPs is received from the network entity.

9. The method according to any one of claims 6 to 8, wherein the plurality of TRPs comprises at least one of: a plurality of TRPs configured by the network entity via higher layer signaling; or Multiple TRPs selected by the UE device and reported in the CSI report.

10. The method of claim 9, wherein the multiple TRPs selected by the UE device include multiple collaborative TRPs, and wherein the configuration message further includes a maximum number of collaborative TRPs.

11. The method according to claim 6, further comprising: determining a configuration for the UE device based on the configuration message from the network entity, the configuration to include coherent joint transmit channel state information (CJT-CSI) in the CSI report, wherein the CJT-CSI comprises CSI measurements of the CMRs from the multiple TRPs coherently combined at the UE device via joint antenna precoding at the multiple TRPs; receiving the plurality of CMRs and the at least one IMR from the plurality of TRPs; measuring the CJT-CSI based on the plurality of CMRs and the at least one IMR; as well as The CSI report including one or more indexes corresponding to the plurality of CMRs is transmitted to the plurality of TRPs.

12. The method of claim 11, wherein the configuration message comprises at least one of: Radio Resource Control (RRC) reconfiguration message; or System Information Block SIB.

13. The method according to any one of claims 2 to 12, wherein the indication of the capability to report the CSI report comprises at least one of: The UE device supports a maximum number of transmission / reception points TRPs reported with the CSI for coherent joint transmission channel state information CJT-CSI; a maximum number of CMRs per said configuration message for said CJT-CSI; a maximum number of antenna ports of each CMR in each of the plurality of CMRs; a maximum number of total numbers of antenna ports across the plurality of CMRs used for the CSI reporting; The maximum number of CMRs across multiple configuration messages; a maximum number of the plurality of configuration messages; or A minimum processing delay for the CSI report.

14. The method of claim 12, wherein: The plurality of CMRs include at least one CMR group spanning the plurality of TRPs, The at least one CMR group is configured by the configuration message, and The CSI report includes an index identifying one of the at least one CMR groups.

15. The method according to claim 14, wherein the CSI report further comprises a plurality of CSI-RS resource indicators (CRIs) and at least one of: Rank indicator RI; Precoder matrix indicator PMI; Channel Quality Indicator CQI; or Layer indicator LI.

16. The method of claim 14, wherein performing the measuring comprises: A CSI processing unit CPU at the UE device may be used to measure the CJT-CSI while processing the plurality of CMRs, wherein the CPU at the UE device is determined based on a total number of configured CMRs.

17. The method according to claim 16, further comprising: operating a plurality of CPUs to perform a plurality of CJT-CST measurements in parallel for inclusion in the CSI report; The number of the multiple CPUs determines the maximum number of CJT-CSI measurements that the UE device can perform in parallel.

18. The method of claim 14, wherein the at least one IMR comprises one or more of a zero power IMR (ZP-IMR) and a non-zero power IMR (NZP-IMR), and wherein the at least one IMR is associated with the at least one CMR group.

19. The method according to claim 18, further comprising: measuring the at least one IMR using a plurality of receive beams at the UE device; or The at least one IMR is measured across two or more CMRs in the at least one CMR group.

20. A method of wireless communication performed by a network entity, the method comprising: receiving, from a user equipment (UE) device, an indication of a capability to report a channel state information (CSI) report based on a plurality of channel measurement resources (CMRs); transmitting to the UE device a configuration message configuring the CSI report based on the received indication; as well as The CSI report including measurements of the plurality of CMRs and at least one interference measurement resource (IMR) within one time slot or two consecutive time slots performed according to the configuration message is received from the UE device.

21. The method of claim 20, wherein the plurality of CMRs comprises: A plurality of non-zero power NZP CSI reference signal CSI-RS resources, each of the plurality of NZP CSI-RS resources corresponding to one TRP of a plurality of transmission / reception points TRPs.

22. The method according to claim 21, further comprising: The CSI-RS in the same resource block (RB) is transmitted to the UE device.

23. The method according to claim 21, further comprising: A common codebook configuration for the CSI report for each of the multiple TRPs is transmitted to the UE device.

24. A device, comprising: one or more radio frequency (RF) modems; a processor coupled to the one or more RF modems; as well as At least one memory storing executable instructions for manipulating at least one of the processor or the one or more RF modems to perform the method according to any one of claims 1 to 23.

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