Channel state information feedback for multiple channel measurement resources by fast mobile devices

Abstract

Example methods and systems are presented for wireless communications for channel state information (CSI) feedback over multiple channel measurement resources (CMRs), such as when a user equipment (UE) moves above a threshold speed relative to a network entity. An example method of wireless communication by a UE device includes receiving a configuration message from a network entity, the configuration message configuring the UE device to generate a CSI report based on at least one CMR. The UE device performs measurements of the at least one CMR at a plurality of time instances according to the configuration message. The UE device generates a CSI report based on measurements of at least one CMR at a plurality of time instances. The UE device transmits the CSI report to the network entity.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority to and the benefits of International Application No. PCT / CN2022 / 112307, filed on August 12, 2022, entitled “CHANNEL STATE INFORMATION FEEDBACK ON MULTIPLE CHANNEL MEASUREMENT RESOURCESOR COHERENT JOINT TRANSMISSION,” under Article 8 of the Patent Cooperation Treaty (PCT), 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, 3GPP 5G NR cellular networks support network slicing, which enables the reuse of virtualized and independent logical networks on the same physical network infrastructure.

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

[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 channel state information (CSI) feedback for user equipment (UE) with high and medium speeds. Example methods and techniques include: providing control signaling to trigger multiple instances of aperiodic CSI reference signal (CSI-RS) for CSI measurement; identifying time instances for CSI measurement; and determining layer indicator (LI) and channel quality indicator (CQI) reported in CSI.

[0007] In general terms, an example method for wireless communication by a user equipment (UE) device includes: receiving a configuration message from a network entity, the configuration message configuring a channel state information (CSI) report based on at least one channel measurement resource (CMR); the UE device performing measurements of the at least one CMR at multiple time instances according to the configuration message. The UE device transmits a CSI report based on the measurements of the at least one CMR at the multiple time instances to the network entity.

[0008] In some implementations, the UE device performs measurements of a plurality of CMRs including at least one CMR and at least one interference measurement resource (IMR) at a plurality of time instances to generate a CSI report.

[0009] In some implementations, a UE device transmits an indication of capability for CSI reporting based on an aperiodic CSI reference signal (CSI-RS).

[0010] In some implementations, the UE device receives a configuration message from a network entity that configures the number of CMR instances for layer indicator (LI) or channel quality indicator (CQI) reporting. In some cases, when the UE device exceeds a threshold speed, the UE device generates a CSI report in a single report that reflects time domain variations of multiple CMRs. The UE device may transmit the CSI report by transmitting a single report of the CSI report to the network entity.

[0011] In some implementations, the UE device transmits to a network entity an indication of a capability to report a CSI report, the indication comprising at least one of: a maximum number of instances of a channel state information reference signal (CSI-RS) resource that the UE device can measure for a CSI report; a number of CSI processing units (CPUs) occupied for a CSI-RS having multiple instances; an upper limit on the number of information elements (IEs) configured for a CSI report; a minimum processing delay of a CSI report defined by parameters Z and Z'; or whether CSI prediction based on a virtual CMR instance is supported. In some cases, the indication of the capability to report a CSI report comprises an indication that the UE device supports CSI prediction based on a virtual CMR instance.

[0012] In some cases, receiving a configuration message includes receiving a configuration message from a network entity that configures the CSI report to include a CSI prediction based on a virtual CMR instance. In some cases, the configuration message includes an indication to the UE device whether to report a channel quality indicator (CQI) from one CMR instance or multiple CMR instances based on the capability.

[0013] In some implementations, a UE device receives downlink control information (DCI) from a network entity for triggering a channel state information reference signal (CSI-RS) set having CSI-RS resources associated with the same configuration. The same configuration may include the same set of CSI-RS resources associated with an aperiodic CSI-RS configuration.

[0014] In some implementations, the configuration message includes at least one of: indicating the number of multiple instances of a channel state information reference signal (CSI-RS) used in the CSI report; the number of time domain bases; a scheme for CSI measurement; or a codebook configuration. In some cases, the scheme for CSI measurement includes a scheme based on multiple virtual CMRs measured before a minimum processing delay for the CSI report and multiple actual CMRs.

[0015] In another general aspect, a method of wireless communication by a network entity includes receiving an indication of capability of CSI reporting based on an aperiodic CSI-RS from a UE device. In response to receiving the indication, the network entity transmits a configuration message to the UE device, the configuration message configuring the CSI reporting based on at least one CMR. The network entity receives a CSI report from the UE device, the CSI report including measurements of the at least one CMR at a plurality of time instances performed by the UE device in accordance with the configuration message.

[0016] 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 operate at least one of the processor or the one or more RF modems to perform the example methods herein.

[0017] Details of the described methods (and related systems and techniques) are discussed in detail below. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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.

[0019] Figure 1 is a block diagram depicting an example framework for channel state information (CSI) according to some embodiments;

[0020] Figure 2 is an example of a CSI processing unit (CPU) occupancy rule depicting periodic or semi-persistent CSI reporting according to some embodiments;

[0021] Figure 3 is an example depicting CSI processing unit (CPU) occupancy rules for aperiodic CSI reporting according to some embodiments;

[0022] Figure 4 An example mechanism for a single CSI report for multiple CSI measurements for a high-speed or medium-speed UE according to some embodiments is shown;

[0023] Figure 5 is a flow chart depicting a method of wireless communication by a user equipment (UE) device according to some embodiments;

[0024] Figure 6 An example call flow diagram for enhancing aperiodic CSI feedback to support UE devices with high / medium speeds according to some embodiments is shown;

[0025] Figure 7 An example scheme with time domain interpolation according to some embodiments is shown;

[0026] Figure 8 is a flow chart depicting a method of wireless communication by a user equipment (UE) device according to some embodiments;

[0027] Fig. 9 is a flow chart depicting a method for a network entity to conduct wireless communications according to some embodiments;

[0028] Fig.10 An example call flow diagram illustrating enhancement of aperiodic and semi-persistent CSI feedback to support UE devices with high / medium speeds according to some embodiments is shown;

[0029] Fig.11 is an example depicting coherent joint transmission (CJT) according to some embodiments;

[0030] Fig.12 is a flow chart depicting a method for CJT CSI reporting by a user equipment (UE) device according to some embodiments;

[0031] Fig.13 shows an example call flow diagram for CJT CSI reporting according to some embodiments;

[0032] Fig.14 is a flow chart depicting a method for CJT CSI reporting by a user equipment (UE) device according to some embodiments;

[0033] Fig.15 is a flow chart depicting a method for a network entity to perform CJT CSI reporting according to some embodiments;

[0034] Fig.16 shows an example of a CMR / IMR configuration and associated CSI framework for CJT-CSI reporting according to some embodiments;

[0035] Fig.17 shows an example of a CMR / IMR configuration and associated CSI framework for CJT-CSI reporting according to some embodiments;

[0036] Fig.18 shows an example of a CMR / IMR configuration and associated CSI framework for CJT-CSI reporting according to some embodiments;

[0037] Fig.19 An example of an aperiodic CSI triggering state configuration according to some embodiments is shown. DETAILED DESCRIPTION

[0038] 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 the 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 contexts described herein, but the techniques described herein can be applied to any network environment.

[0039] The present disclosure provides a method and system for wireless communication for fast-moving devices to perform channel state information (CSI) feedback on multiple channel measurement resources. For example, a user equipment (UE) device transmits an indication of the ability to report CSI based on a non-periodic CSI reference signal (CSI-RS). The UE device receives a configuration message from a network entity, which configures the CSI report based on at least one channel measurement resource (CMR). The UE device performs measurements of the at least one CMR at multiple time instances according to the configuration message (for example, allowing the measurements at the multiple time instances to reflect the status of the fast-moving UE device). The UE device can perform measurements of multiple CMRs including at least one CMR and at least one interference measurement resource (IMR) at multiple time instances to generate a CSI report. The UE device transmits a CSI report based on the measurements of at least one CMR at multiple time instances to the network entity.

[0040] Figure 1 is a block diagram illustrating an example framework 100 of 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.

[0041] 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 in CSI-ReportConfig 101 to measure interference. 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 one 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.

[0042] 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 helps in MU-MIMO pairing with low-rank transmission and precoder selection for 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 the CSI was measured.

[0043] The gNB can configure the time domain behavior of CSI reporting, such as periodic / semi-persistent / aperiodic reporting, in CSI-ReportConfig. 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.

[0044] 3GPP technical specifications (eg, from Release 15 or Rel-15) provide the following types of CSI-RS for physical layer (eg, layer 1) related measurements.

[0045] The CSI-RS used for tracking is also called a Tracking Reference Signal (TRS). It is a set of CSI-RS resources configured with the RRC parameter TRS-Info. TRS is used for time / frequency offset tracking.

[0046] CSI-RS for beam management (BM): The CSI-RS for BM is configured in the CSI-RS resource set configured with the RRC parameter repetition.

[0047] 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 for which the RRC parameters TRS-Info and repetition are not configured.

[0048] In the present disclosure, unless otherwise specified, CSI-RS indicates a CSI-RS used for CSI acquisition.

[0049] Since Rel-15, the Type 2 CSI codebook for CSI reporting has been introduced for UE to measure and report CSI, where the precoder is quantized as follows:

[0050] in, The dimension is N Tx Multiply by 2L wideband precoder; is a subband precoder of dimension 2L times v; L indicates the number of beams and v indicates the number of layers, which is RI+1.

[0051] can be quantized based on the codebook, and can be quantized based on the power and angle of each element, which may result in large overhead because It is based on subbands, and there may be multiple subbands for CSI reporting, which is determined by the bandwidth of the CSI-RS. In one example, the codebook for W1 selection can be defined as follows:

[0052] 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 oversampling factors 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.

[0053] The 3GPP technical specification (e.g., in Release 16 or Rel-16) also introduces an enhanced Type 2 codebook for CSI reporting of TRP, where the precoder can be quantized as follows:

[0054] in, Same as Rel-15 Type2 codebook, it is used to provide spatial domain basis (SD-basis); indicates the wideband beam combining weights of dimension 2L times M, and Indicates a frequency domain basis (FD-basis) of dimension N3 times M, where N3 is the number of subbands and can be derived by the RRC parameter numberOfPMI-SubbandsPerCQI-Subband, and M can be derived by 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.

[0055] 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 reporting, where the priority is calculated according to section 5.2.5 in 3GPP TS 38.214. The CPU occupancy rules for periodic / semi-persistent / aperiodic CSI reporting are defined in, for example, 3GPP TS 38.214 section 5.2.1.6 (CSI processing criteria).

[0056] 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 invention, periodic or semi-persistent CSI reports 245 (excluding the initial semi-persistent CSI report on PUSCH after the PDCCH triggers the report) are started from the first symbol of the earliest one of each CSI-RS / CSI-IM / synchronization signal block (SSB) resource used for channel or interference measurement - the corresponding latest CSI-RS / CSI-IM / SSB timing is no later than the corresponding CSI reference resource, until the last symbol of the configured PUSCH / PUCCH carrying the report occupies the CPU.

[0057] exist Figure 3In the example, the aperiodic CSI report 345 occupies the CPU from the first symbol after the CSI report is triggered by the PDCCH 322 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 3GPP TS 38.213 clause 10.1 / section (see also TS 38.213 section 6), for determining the CPU occupation duration, the PDCCH candidate that ends later in time is used.

[0058] The initial semi-persistent CSI report on PUSCH after a PDCCH trigger occupies the CPU from the first symbol after the PDCCH until the last symbol of the scheduled PUSCH carrying the report. When a PDCCH reception includes two PDCCH candidates from two corresponding search space sets, as described in 3GPP TS 38.213 clause 10.1 / section (see also TS 38.213 section 6), for determining the CPU occupancy duration, the PDCCH candidate that ends later in time is used.

[0059] In addition, two minimum processing delays for CSI reporting are defined as follows, where the scheduling of CSI reporting may follow the minimum processing delays Z and Z'. Candidate values ​​for 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 if there are no other signals such as data and HARQ-ACK to be transmitted on the PUSCH triggered by the DCI, the UE may ignore the DCI.

[0060] 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. • 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, and • If the first uplink symbol used to carry the nth CSI report (including the effect of timing advance) is no earlier than symbol Z' ref (n).

[0061] Figure 4An example mechanism 400 of 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, such as UEs with a mobile speed above 30 km / h (or a threshold speed) 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.

[0062] Since the UE's position does not change in a short time, such as several time slots, the SD / FD basis does not change, and only the beam combining weights change. For CMR instance t, the UE can select the precoder as

[0063] For t -N4+1 ,t -N4+2 The selected precoder for the N4 CMR instances at t0, ..., t1 can be expressed as follows:

[0064] Then the precoder W can be compressed as follows

[0065] Where W td indicates a matrix with dimensions N4 times T and having T time domain bases (TD bases); Indicates the new beam combining weights for N4 CMR instances of dimension 2L times M*T. The TD basis can also be expressed as a Doppler domain basis (DD basis).

[0066] For CSI measurement at high / medium speed, the first issue is about the control signaling for triggering 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 of CSI feedback. The third issue is how to calculate other CSI components such as LI, CQI based on the precoder and channel measured for multiple instances.

[0067] Figure 5is 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. Method 500 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-transitory memory storing executable instructions for manipulating at least one of the processor or the RF modem to perform method 500. A network entity may perform complementary methods to interact with a UE device performing method 500 (see Figure 6 600 in the call flow diagram).

[0068] refer to Figure 5 , the method illustrates example functions used by various embodiments. Although specific functional blocks ("boxes") are disclosed in the method, such boxes are examples. That is, the embodiments are well suited to performing various other boxes or variations of boxes listed in the method. It should be understood that the boxes in the method can be executed in an order different from the order presented, and not all boxes in the method can be executed.

[0069] like Figure 5 As shown, the method 500 includes block 510: transmitting, by the 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.

[0070] The method 500 includes block 520 of receiving a configuration message from a network entity acting in response to an indication transmitted by a UE device, the configuration message configuring the UE device to determine a CSI report.

[0071] The method 500 includes block 530: performing measurements of signals and noise according to the configuration message. For example, the UE device may perform concurrent measurements of multiple CMRs and at least one interference measurement resource (IMR) for multiple time instances by the UE device as configured according to the configuration message. In some cases, the method 500 includes preparing a single CSI report reflecting time domain changes of two or more CMRs in the multiple CMRs based on the concurrent measurements.

[0072] 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.

[0073] In some aspects, the method 500 further includes: decoding multiple 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 multiple instances of the CSI-RS including one or more of the following: CMR, IMR, and a time instance for CSI measurement. The method 500 may also include: obtaining a precoder value based on at least a layer indicator (LI) or a channel quality indicator (CQI) corresponding to each CMR of two or more of the multiple 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.

[0074] In some embodiments, the method 500 may include performing concurrent measurements on multiple CMRs and at least one IMR at multiple time instances. The method may include: when the UE device exceeds a threshold speed, determining or generating a single CSI report reflecting the time domain variation of each of two or more of the multiple CMRs. The UE device transmits the single CSI report to a network entity.

[0075] 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.

[0076] In some embodiments, the indication of the ability to report CSI reports includes any of the following: the maximum number of CSI-RS resource instances that the UE device can measure for CSI reporting; the 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; the minimum processing delay for CSI reports; and whether CSI prediction for CSI measurements based on virtual CMR instances is supported.

[0077] 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.

[0078] 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.

[0079] In some embodiments, the configuration message may include: indicating the number of multiple instances of CSI-RS used in the CSI report; 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 the minimum processing delay of the CSI report.

[0080] 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 an aperiodic CSI-RS that is used by a UE device to report a CSI report when the UE device is traveling at a speed not less than a threshold speed relative to the network entity.

[0081] Figure 6 An example call flow diagram 600 for enhanced aperiodic CSI feedback to support UE devices 102 with high / medium speeds according to some embodiments is shown. 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, such as 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.

[0082] After receiving the capability, the gNB may send a configuration message (e.g., an RRCReconfiguration message or an RRCResume message) to the UE, the RRC message 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 the RRC message.

[0083] 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 for high / medium UE speed and multiple instances of aperiodic CSI-RS. Accordingly, 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.

[0084] 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 a signal-to-interference-plus-noise (SINR) ratio from the measurements. The UE selects a precoder matrix W (e.g., a component of the CSI) and selects other components of the CSI, such as the LI and CQI, based on the selected precoder matrix and the channel estimate. Finally, the UE reports 640 the CSI (e.g., the above components) for high / medium UE speeds to the gNB, and the gNB performs 650 CSI decoding.

[0085] In an 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 that a 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) For CSI reporting based on aperiodic CSI-RS with multiple instances, the minimum processing delay defined by parameters Z and Z', or 5) Whether CSI prediction is supported, such as CSI measurement based on virtual CMR instances.

[0086] Each, some or all of the one or more capabilities described above 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.

[0087] In an embodiment, the configuration of 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 amount of oversampling factors in the horizontal and vertical domain (O1, O2) • Number of subbands per CQI calculation, which indicates the number of CSI compressed subbands used for CQI calculation • RI constraints, which are used to indicate the candidate loss factors 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

[0088] 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 aperiodic CSI-RS instances, the number of CMR instances is N4. Details on triggering more than 1 instance of aperiodic CSI-RS will be shown in the next embodiment. Therefore, for CSI reporting based on aperiodic CSI-RS, RRC parameters regarding the number of CMR instances may not be provided.

[0089] 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 (e.g., MAC CE or DCI). For example, the gNB includes the N4 value in the configuration of the enhanced aperiodic CSI feedback (e.g., RRC configuration), and transmits a MAC CE or DCI including the 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 of the enhanced aperiodic CSI feedback does not include the number of instances (N4).

[0090] 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 a CSI report with the number of instances

[0091] The “CSI measurement scheme” may configure the UE to select one of the following schemes to identify the N4 time instances for CSI reporting.

[0092] Solution 1: The reported CSI may be measured based on N4 instances of the CMR before the minimum processing delay for CSI reporting.

[0093] Solution 2: The reported CSI may be measured based on virtual N4 CMR instances and the actual CMR before the minimum processing delay of the CSI report.

[0094] Figure 7 An 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 spaced by virtual CMR intervals 724 can be used to identify time instances of time domain interpolation 726. For scheme 2, the UE needs to apply time domain interpolation as shown. Some additional parameters as follows can be predefined or configured through RRC signaling in CSI-ReportConfig: The starting offset 722 of the first virtual CMR instance 730 for CSI measurement is used to indicate the time domain position of the starting CMR instance with reference to the first or last symbol of the CSI report. An interval 724 of virtual CMR instances 730, 732, ..., 734 for CSI measurement, which is used to indicate an interval between each virtual CMR instance 730, 732, ..., 734; and The number 718 of actual CMR instances 710 used for CSI measurement is used to indicate the actual CMR instances used for CSI measurement before time domain interpolation.

[0095] In one example, the starting offset of the virtual CMR instance may be predefined as X time slots after the time slot with the CSI report or the first / 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 of the actual CMR. The number of actual CMR instances may be the same as the number of instances of 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.

[0096] In an embodiment, the gNB may trigger multiple instances of aperiodic CSI-RS via a DCI of, for example, DCI format 0_1 ​​or 0_2.

[0097] 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 by DCI, such as through the DCI field CSI request, the gNB may transmit CSI-RS in the configured instances, where the time domain position of 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.

[0098] In another implementation, the gNB may trigger multiple instances of CSI-RS by triggering a set of CSI-RS with the same configured CSI-RS resources through DCI, such as a DCI field CSI request. In a set of CSI-RS resources, 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 multi-instance aperiodic CSI-RS configuration. For the CSI-RS resources in a resource set, other 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.

[0099] In another implementation, the gNB may configure the number of instances of the triggered aperiodic CSI-RS resource and / or the interval between two consecutive instances through the DCI for triggering the aperiodic CSI-RS resource. In one example, a field number of instance may be introduced in the DCI. In another example, a field interval between two consecutive instances for a CSI-RS may be introduced in the DCI.

[0100] In an embodiment, after receiving the signaling for triggering CSI reporting for high / medium UE speed, the UE may select the precoder for the target time instance as follows

[0101] 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 of the first or 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.

[0102] 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 of each CMR instance. In some embodiments, the UE may report two LI / CQIs based on the CMR instance, which represent 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 and last CMR instances, respectively. The CMR instance may be an actual CMR instance or a virtual CMR instance.

[0103] 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 through RRC signaling, for example, RRC parameters in CSI-ReportConfig, or MAC CE, or DCI.

[0104] Figure 8 is a depiction according to some embodiments by a UE device (such as Figure 6 Flow chart of method 800 for performing wireless communication with a UE device 102). Fig. 9 is a network entity (such as Figure 6 Flow chart of method 900 for performing wireless communication with gNB104).

[0105] like Figure 8 As shown, method 800 begins by transmitting 810 to a network entity an indication of UE capabilities supporting enhanced aperiodic CSI feedback (similar to Figure 6 Operation 610).

[0106] 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).

[0107] 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).

[0108] like Fig. 9 As shown, method 900 begins by receiving 910 from a UE device an indication of UE capabilities supporting enhanced CSI feedback (similar to Figure 6 Operation 610).

[0109] 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).

[0110] The network entity receives 940 a CSI report from a UE device having CSI for a high or medium UE speed (similar to Figure 6 Based on the CSI report, the network entity determines 955 a CMR instance for the reported CSI, identifies a precoder for further downlink transmission, and transmits a downlink channel based on the identified precoder.

[0111] 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 indicating support for enhanced aperiodic CSI feedback from the UE, 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 conventional aperiodic CSI feedback to the UE. After configuring conventional 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 conventional aperiodic CSI feedback.

[0112] 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 configure conventional aperiodic CSI feedback to the UE.

[0113] 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 conventional aperiodic CSI feedback. After configuring conventional CSI feedback for the UE, the gNB may transmit a CSI report triggering signal to the UE to trigger conventional aperiodic CSI feedback.

[0114] 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 a CSI report trigger signal to the UE to trigger traditional aperiodic CSI feedback.

[0115] 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).

[0116] Fig.10 An example call flow diagram 1000 is shown for enhancing aperiodic and semi-persistent CSI feedback to support UE devices 102 with high / medium speeds in accordance with some embodiments. For example, the call flow diagram shows a general process for periodic / semi-persistent CSI-RS based CSI feedback for high / medium UE speeds. As shown, the UE device 102 transmits 1010 to the gNB 104 a UE capability report for periodic or semi-persistent CSI-RS based CSI feedback for high or medium UE speeds. Figure 6 Compared with the call flow chart 600 in FIG. 1 , the differences are as follows.

[0117] 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 reporting configurations for periodic / semi-persistent CSI, and / or the maximum number of periodic / semi-persistent CSI reports.

[0118] 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.

[0119] Subsequently, the gNB 104 transmits 1021 the CSI-RS and associated IMR for CMR. In some cases, some or all instances of the CSI-RS configured as CMR may be transmitted prior to the control signaling for triggering CSI reporting (when the gNB 104 triggers 1022 aperiodic or semi-persistent CSI reporting). The signaling for triggering semi-persistent CSI reporting may be a MAC CE. In some implementations, the number of instances (N4) may be indicated by a MAC CE.

[0120] The gNB 104 then transmits 1024 the CSI-RS and associated IMR for CMR to the UE device 102. The UE device 102 performs 1030 CSI measurements and generates a CSI report based on multiple CMR instances. Since the CSI is measured over multiple time instances, the CSI measurements reflect the dynamics of the UE device 102 when traveling at a high or medium speed (e.g., such as 30 kilometers per hour).

[0121] The UE device 102 transmits 1040 a CSI report with CSI for a high or medium UE speed. 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).

[0122] 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)).

[0123] In addition, in the present disclosure, the described solutions are based on 5G NR technology. It is understood that the solutions can be applied to other wireless technologies such as 6G. "gNB" can be summarized as a base station or a radio access network (RAN) node.

[0124] Fig.111 is an example 1100 illustrating coherent joint transmission (CJT) according to some embodiments. As shown, the UE can operate from 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 combination can be applied. In one example, the precoder of the PDSCH transmission layer can be generated as ,in indicates the antenna combination factor of TRP k, and indicates the Precoder.

[0125] Since Rel-15, the Type 2 CSI codebook for TRP CSI reporting has been introduced for UE to measure and report CSI, where the precoder is quantized as follows:

[0126] in, The dimension is N Tx Multiply by 2L wideband precoder; is a subband precoder of dimension 2L times v; L indicates the number of beams and v indicates the number of layers, which is RI+1.

[0127] can be quantized based on the codebook, and can be quantized based on the power and angle of each element, which may result in large overhead because It is based on subbands, and there may be multiple subbands for CSI reporting, which is determined by the bandwidth of the CSI-RS. In one example, the codebook for W1 selection can be defined as follows:

[0128] 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 oversampling factors 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.

[0129] In Rel-16, an enhanced Type 2 codebook for CSI reporting of TRP is introduced, where the precoder can be quantized as follows:

[0130] in, indicates wideband beam combining weights of dimension 2L times M; and Indicates a frequency domain basis of dimension N3 times M, where N3 is the number of subbands and can be derived by the RRC parameter numberOfPMI-SubbandsPerCQI-Subband, and M can be derived by RRC signaling numberOfPMI-SubbandsPerCQI-Subband and paramCombination. Details can be found in section 5.2.2.2.5 of 3GPP TS 38.214.

[0131] One possible way to perform CSI feedback for CJT is to report the quantized CSI as ,in Indicates the quantized precoder of TRP k. In some embodiments, another possible approach is to extend the current codebook for multi-TRP operation by considering beams from multiple TRPs. Thus, the dimension of each weight can be defined as The dimension is N TRP *N Tx Multiply by N TRP *2L wideband precoder, Indicates the dimension is N TRP *2L times the wideband beam combining weight of M.

[0132] Regardless of which quantization scheme is used, it may be an issue how to configure the CSI framework to support CSI feedback for CJT (e.g., CMR / IMR configuration and association, CSI-RS configuration) and UE behavior for CMR / IMR measurement and CSI-RS reception. The CSI framework may also support TRP selection. A second issue may be how to define UE behavior for CJT CSI measurements, such as CPU occupancy rules and minimum processing delay for CJT CSI measurements and reporting.

[0133] Fig.12is a flow chart depicting a method 1200 for CJT CSI reporting 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-transitory memory storing executable instructions for manipulating 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 a UE device performing the method 1200 (see Fig.13 1300 in the call flow diagram).

[0134] 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 listed 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.

[0135] 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.

[0136] 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.

[0137] The method 1200 includes block 1230 of measuring CJT-CSI based on a plurality of CMRs and at least one IMR.

[0138] 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.

[0139] In some embodiments, the configuration message comprises at least one of: a radio resource control (RRC) reconfiguration message; or a system information block (SIB).

[0140] 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 including 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 of CJT-CSI; the maximum number of CMRs per configuration message for CJT-CSI; the maximum number of antenna ports for each CMR in multiple CMRs; the maximum number of total number of antenna ports for multiple CMRs across CSI reports; the maximum number of CMRs across multiple configuration messages (of CSI-reportConfig); and the maximum number of multiple configuration messages.

[0141] In some embodiments, the plurality of CMRs include one or more groups of CMRs across a plurality of TRPs, the one or more groups of CMRs being configured via a configuration message, and the CSI report includes an index identifying a group of CMRs in the one or more groups of CMRs.

[0142] 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).

[0143] 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 groups of CMRs. For example, the UE device may determine that a trigger to include CJT-CSI in a CSI report requires a number of CPUs that exceeds a maximum number of CPUs included in an indication of the ability to report CSI reports; and discard the trigger or determine that the trigger corresponds to an erroneous request from a network entity.

[0144] 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 dictates the maximum number of CJT-CSI measurements that the UE device can perform in parallel.

[0145] 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 a set of CMRs in the one or more sets of CMRs.

[0146] 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 a group of CMRs in the one or more groups of CMRs.

[0147] 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 process 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 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.

[0148] 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 a CJT-CSI report to gNB 104.

[0149] The UE device 102 may perform CJT-CSI measurement and reporting based on one, some, or all of the following capabilities of 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 of reference signals that a UE can measure and process simultaneously, for which this capability is provided • Minimum processing delay for CJT-CSI measurements and reporting

[0150] In some implementations, each, some, or all of the capabilities may be defined or specified per CC per band combination supported by the UE. Each, some, or all of the one or more capabilities of each CC in the CCs in the band combination supported by the UE may be the same or different. Each, some, or all of the capabilities of CCs in different band combinations supported by the UE may be the same or different.

[0151] In other implementations, each, some, or all of the capabilities may be defined or specified per frequency band combination supported by the UE. Each, some, or all of the capabilities of 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 continuous frequency band combination, an intra-band non-contiguous frequency band combination, or an inter-band frequency band combination.

[0152] In yet other implementations, each, some or all of the capabilities may be defined or specified per frequency band supported by the UE.The capability (each or some) of the frequency bands supported by the UE may be the same or different.

[0153] In yet other implementations, each, some, or all of the capabilities may be defined or specified per frequency range (FR) supported by the UE. Each, some, or all of the one or more capabilities of the FRs (eg, FR1 and FR2) 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 per UE, eg, regardless of CC, band combination, band, and FR.

[0155] In some implementations, the UE may transmit 1302 one, 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 of 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. With 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 the CN.

[0156] Based on the capability / capabilities of 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 to the UE an RRC message (e.g., an RRCReconfiguration message or an RRCResume message) including a CSI-reportConfig IE, wherein each IE may configure a CMR, at least one IMR to be associated with each of the CMRs used for CJT-CSI measurement, and a configuration of uplink resources, such as a PUCCH or PUSCH, for CJT-CSI reporting. In some implementations, the gNB may configure multiple CMR groups for CJT-CSI measurement and the IMRs associated with each CMR group in the RRC message. 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 (in each group) 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 this case, 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.

[0157] 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 non-periodic 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, 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 a trigger message. After receiving a 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.

[0158] 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 of reference signals that the UE can simultaneously measure and process for which this capability is provided. When performing CJT-CSI measurement and / or reporting, the UE determines the CSI processing unit (CPU) occupancy of each of the CPUs.

[0159] In other implementations, the UE has multiple CSI processing units (CPUs), and the UE can use these CSI processing units (CPUs) 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). When performing CJT-CSI measurements and / or reports as well as other types of CSI measurements and / or reports, the UE determines the CSI processing unit (CPU) occupancy of each CPU in the CPU. In one implementation, if the UE has used 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 has used a CPU for CJT-CSI measurements and / or reports, the UE cannot use the CPU to perform non-CJT-CSI measurements and / or reports.

[0160] 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 among 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.

[0161] Fig.14 is a diagram according to some embodiments of a user equipment (UE) device such as Fig.13 Flow chart of method 1400 for performing CJT-CSI reporting on a UE device 102). Fig.15 is a depiction according to some embodiments of a network entity such as Fig.13 104 in the gNB 104). The method 1500 performed by the network entity is complementary to the method 1400 performed by the UE device. According to aspects of the present disclosure, unless otherwise specified, 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 the UE capabilities via UE capability report signaling or from the core network (e.g., access and mobility management function (AMF)).

[0162] In addition, in the present disclosure, the described solutions are based on 5G NR technology. It is understood that the solutions can be applied to other wireless technologies such as 6G. "gNB" can be summarized as a base station or a radio access network (RAN) node.

[0163] exist Fig.14 In the method 1400, the method 1400 begins by transmitting 1402 to the network entity the UE capabilities regarding CJT-CSI measurement and reporting (similar to Fig.13 Operation 1302 of the UE). The UE receives 1410 control signaling of a CSI framework for CJT-CSI measurement and reporting from a network entity (similar to Fig.13 Operation 1310).

[0164] 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).

[0165] If the CPU is available, the UE performs 1430 CJT-CSI measurement (similar to Fig.13 Based on the CJT-CSI measurement, the UE transmits 1440 a CJT-CSI report to the network entity (similar to Fig.13 Operation 1340).

[0166] exist Fig.15 In the method 1500, after receiving the UE capabilities, decoding 1504 the UE capabilities for CJT-CSI measurement and reporting. The network entity transmits 1510 to the UE device a control signaling (similar to the CSI frame for CJT-CSI measurement and reporting) for CJT-CSI measurement and reporting. Fig.13 Operation 1310).

[0167] The network entity further transmits 1512 a plurality of CMRs and one or more IMRs (similar to Fig.13 Operation 1312 of ). The network entity then receives and decodes 1550 the CJT-CSI report from the UE device.

[0168] In an embodiment, a UE may report its capabilities regarding the maximum number of TRPs that the UE 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 for CMRs across 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.

[0169] In an embodiment, for CMR configuration for CJT-CSI measurement, the gNB may configure N CMR groups for CSI reporting through RRC signaling, for example, 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 N TRP,kIt 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 to report CMR group index k, CSI can be measured from all CMRs in the CMR group. In another implementation, for the UE to report CMR group index k, the UE can report an indicator to report the index of the measured CMR in the CMR group to report which CMR(s) 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.

[0170] 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-located (QCL) type (QCL with spatial Rx parameters) or in frequency range 2, the UE may receive IMR based on multiple QCL-TypeD assumptions based on all CMRs in the CMR group. In one 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).

[0171] 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 of this implementation. In one example, in the CSI-ResourceConfig of a CMR configured for semi-persistent / periodic CJT-CSI reporting, the gNB may configure up to N resource sets in nzp-CSI-RS-ResourceSetList, where resource set k has N TRP,kIn another example, for aperiodic CJT-CSI reporting, the gNB may configure up to N resourceSets in CSI-AssociatedReportConfigInfo for gNB to select N CMR groups 1603.

[0172] 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 of the 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 of the 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 of 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.

[0173] In another implementation, for IMR configuration, the gNB may configure the N associated with the CMR in CMR group 1603 through RRC signaling, for example, RRC parameters in CSI-reportConfig. TRP,k ZP IMR 1607 and / or N TRP,kNZP-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 of 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 the NZP-IMR of 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 effective channel of subcarrier u estimated from NZP-IMR j. In some embodiments, the antenna combining factor of NZP-IMR may be predefined.

[0174] 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 of this implementation. In one example, in the CSI-ResourceConfig of CMR / IMR configured for semi-persistent / periodic CJT-CSI reporting, the gNB may configure N resource sets in nzp-CSI-RS-ResourceSetList or csi-IM-ResourceSetList, where resource set k has N TRP,kIn 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 the associated ZP-IMR / NZP-IMR. In some embodiments, for non-periodic CJT-CSI reporting, the gNB triggers all configured CMR sets 1703 and / or all configured IMR sets 1707 and 1709 of 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.

[0175] In another implementation, for IMR configuration, the gNB may configure a ZP IMR 1707 and / or N associated with CMR 1703 in CMR group 1713 through RRC signaling, e.g., RRC parameters in CSI-reportConfig 1701. TRP,k NZP IMRs 1709, where CMR and NZP-IMR are associated one-to-one. The UE's interference measurement behavior for ZP / NZP IMR is based on the above implementations for N-to-one CMR / IMR association and one-to-one IMR / CMR association.

[0176] In another implementation, for IMR configuration, the gNB may configure an NZPIMR 1707 and / or NZPIMR 1707 associated with a CMR 1703 in a CMR group 1713 through RRC signaling, e.g., RRC parameters in CSI-reportConfig 1701. TRP,kZP IMR 1709, where CMR and ZP-IMR are associated one-to-one. The behavior of UE performing interference measurement on NZP / ZP IMR is based on the above implementation modes for N-to-one CMR / IMR association and one-to-one IMR / CMR association respectively.

[0177] In another embodiment, for CMR configuration for CJT-CSI measurement, the gNB may configure N via RRC signaling, for example, in CSI-reportConfig. TRP CMR groups 1713 are used for CSI reporting, where 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 the 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 predefined, for example, 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. Then, the number of reported CRIs can be the same as the number of selected CMR group indexes. For CSI reported in long PUCCH or PUSCH, the selected CMR group index may be reported in CSI part 1. Then, the CSI reported in CSI part 2 may be reported based on the CMR group index reported in CSI part 1.

[0178] In an implementation, for IMR configuration, the gNB may configure the MMR associated with CMR 1703 in CMR group 1713 through RRC signaling, for example, RRC parameters in CSI-reportConfig 1701. k ZP IMR 1707 and / or M kNZP-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 the CMR group. In one implementation, for the NZP-IMR of 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 effective channel of subcarrier u estimated from NZP-IMR j. In some embodiments, the antenna combining factor of NZP-IMR may be predefined.

[0179] 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 of this implementation. In one example, in the CSI-ResourceConfig of CMR / IMR configured for semi-persistent / periodic CJT-CSI reporting, the gNB may configure NTRP resource sets in nzp-CSI-RS-ResourceSetList or csi-IM-ResourceSetList, where resource set k has M k In another example, for aperiodic CJT-CSI reporting, the gNB may configure up to N resources 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 non-periodic CJT-CSI reporting, the gNB triggers all configured CMR sets and / or all configured IMR sets of 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.

[0180] 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 CMR and IMR corresponding to the CRI combination may be associated in an N-to-one manner. The interference measurement operation in the above-mentioned embodiment for N-to-one CMR / IMR association may be applied.

[0181] 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.

[0182] 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.

[0183] 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 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 of CSI-reportConfig • Bandwidth part index, which is used to indicate the bandwidth part index of CSI-reportConfig • CSI report index, which is used to indicate the CSI-reportConfigId of the CSI-reportConfig, • Active CMR Group Index, which can be a bitmap used to indicate the CMR group index to be activated • The Transmission Configuration Status (TCI) index of the active CMR, which can be used to indicate the beam / quasi-co-location information of the active CMR.

[0184] 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.

[0185] For dynamic activation or triggering based on DCI, the gNB can configure the candidate CMR group index corresponding to the CSI triggering state configured by CSI-AssociatedReportConfigInfo for the triggered CSI-reportConfig. Then, the gNB can dynamically activate the CMR group index for CJT-CSI measurement and reporting by indicating the CSI triggering state in the DCI field CSI request in DCI (e.g. DCI 0_1) to trigger the UE to send CJT-CSI report.

[0186] 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:

[0187] An example implementation of N CMR sets and N IMR sets over ASN.1 for aperiodic CSI reporting is as follows:

[0188] In some implementations, the gNB may include one or more CSI-AssociatedResourceConfigInfo-r18 IEs in the CSI-AperiodicTriggerStateList-r18 IE, include CSI-AperiodicTriggerStateList-r18 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.

[0189] To configure CJT-CSI measurement and reporting, the gNB may transmit to the UE the CSI configuration parameters: aperiodicTriggerStateList(-r18) (e.g., CSI trigger state list), csi-ReportConfigtoAddModList (e.g., CSI-ReportConfig IE list), 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., RRCReconfiguration message and / or RRCResume message) including the CSI configuration parameters.

[0190] In some implementations, each of the at least one CSI-ReportConfig IE in csi-ReportConfigtoAddModList includes a list of CSI resource group configurations that configure 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

[0191] 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 IE1, ..., 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 indices 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

[0192] As shown in Example Implementation 2, the gNB may configure N-1 CMR groups and / or N-1 IMR groups by including csi-ResourcesGroupConfigList-r18 including CSI-ResourcesGroupConfig-r18IE 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 of 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 an index of 1.

[0193] Using 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

[0194] As shown in example implementation 3, the gNB may configure N CMR groups and / or N IMR groups by including the csi-ResourcesGroupConfigList-r18 including CSI-ResouresGroupConfig IE1, ..., N in the CSI-ReportConfig-r18 IE. That is, the CSI-ResouresGroupConfig IE 1, ..., N corresponds to CMR groups 1, ..., N. In one implementation, the gNB and the UE determine the CSI-ResouresGroupConfig IE 1, ..., N with indexes 1, ..., N, respectively, according to the order of the CSI-ResouresGroupConfig IE 1, ..., N in the csi-ResourcesGroupConfigList-r18.

[0195] In some implementations, the gNB may include one or more CSI-ReportConfig-r18 IEs in csi-ReportConfigToAddModList-r18, include csi-ReportConfigToAddModList-r18 in 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 according to the CMR set and one or more IMRs configured in the CSI-ReportConfig-r18 IE.

[0196] 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 for the purpose of describing the present disclosure, 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.

[0197] 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.

[0198] In another embodiment, for each TRP for CJT-CSI reporting, the gNB may provide a separate codebook configuration to the UE through 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 TRPs, such as numberOfPMI-SubbandsPerCQI-SubbandList, paramCombinationList, etc.

[0199] In an implementation, to reduce UE memory for signal buffering, the gNB shall avoid configuring different periodicities or different periodicities and offsets for periodic / semi-persistent CSI-RS configured for CJT-CSI measurement from different TRPs, where the periodicity and offset are configured via RRC signaling periodicityAndOffset. In some embodiments, the UE may report its capability to support CJT-CSI measurement for periodic / semi-persistent CSI-RS configured with different periodicities and / or offsets from different TRPs. The UE may further report its capability on the number of different periodicities and / or offsets it can support, where the number may be lower than the maximum number of TRPs for CJT operation (e.g., 4).

[0200] In addition, considering the influence of the automatic gain control (AGC) of the UE, the gNB transmits the CSI-RS for CJT-CSI measurement within one 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.

[0201] In an embodiment, to reduce the complexity of CSI measurement for the UE, for wideband and / or subband CJT-CSI reporting, the gNB should avoid configuring different physical resource blocks (PRBs) for CSI-RS configured for CJT-CSI measurement from different TRPs, where the PRBs of the 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 the number may be lower than the maximum number of TRPs for CJT operation (e.g., 4). In some embodiments, if the PRBs of the CSI-RS for CJT-CSI measurement are configured to be different, the UE may measure CJT-CSI for the common PRBs among the CSI-RS.

[0202] In an embodiment, the gNB may configure the energy per resource element (EPRE) ratio between PDSCH and CSI-RS from the same TRP through higher layer signaling, e.g., RRC signaling in NZP-CSI-RS-Resource, or 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 requests in DCI.

[0203] 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 of TRP j. The power scaling factor can be determined based on the EPRE ratio between CSI-RS and PDSCH. CPU usage rules and minimum processing delay

[0204] 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 used to trigger the CSI report or report outdated CSI. In some embodiments, the UE may assume or determine that such scheduling is an error condition.

[0205] In an embodiment, for CMR grouping scheme 1, for example, Fig.16 and Fig.17 The CMRs in the groups 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 in each group.

[0206] In the implementation, the gNB and UE may assume that they can occupy This CPU occupancy rule assumes that one CPU is occupied by the UE to measure the precoder of one TRP, and the other CPU is used to measure the cross-TRP antenna combining factor and other CSI information for each group.

[0207] In another implementation, the gNB and the UE may assume that they can occupy This CPU occupancy rule assumes that one CPU is occupied by the UE to measure the precoder of one TRP, and one of the CPUs used for each TRP precoder search can be 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 that they can occupy CPUs, where S indicates the maximum number of different CMRs in CSI-reportConfig. This CPU occupation rule assumes that one CPU is occupied by the UE to measure the precoder of 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.

[0209] In another implementation, the gNB and the UE may assume that they can occupy CPUs, where S indicates the maximum number of different CMRs in CSI-reportConfig. This CPU occupation rule assumes that one CPU is occupied by the UE to measure the precoder of one TRP, where the UE only calculates the overlapping CMR once, and one of the CPUs used for each TRP precoder search can be 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 that they can occupy This CPU occupancy rule assumes that each CMR group occupies one CPU and parallel processing is not supported within a CMR group.

[0211] In another implementation, the gNB and UE may assume that they can occupy 1 CPU. This CPU occupancy rule assumes that no parallel processing is applied.

[0212] In another embodiment, for CMR grouping scheme 2, for example, Fig.18 A CMR in a group corresponds to one TRP. For such a CSI-reportConfig, the number of CPUs may be predefined or determined based on the number of CMRs in each group.

[0213] In the implementation, the gNB and UE may assume that they can occupy This CPU occupancy rule assumes that one CPU is occupied by the UE to measure the precoder of one TRP, and the other CPU is used to measure the cross-TRP antenna combining factor and other CSI information for each group.

[0214] In another implementation, the gNB and the UE may assume that they can occupy This CPU occupancy rule assumes that one CPU is occupied by the UE to measure the precoder of one TRP, and one of the CPUs used for each TRP precoder search can be 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 that they can occupy This CPU occupancy rule assumes that one CPU is occupied for CRI combination processing, and that CRI combination is used and parallel processing is not supported.

[0216] In another implementation, the gNB and UE may assume that they can occupy 1 CPU. This CPU occupancy rule assumes that no parallel processing is applied.

[0217] In an embodiment, the minimum processing delay of the CJT-CSI report may be predefined.

[0218] In one implementation, the minimum processing delay of the CJT-CSI report may be the same as that of the Type 2 CSI report. In one example, it may be (Z2, Z2') as defined in Section 5.4 of 3GPP TS 38.214.

[0219] 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.

[0220] In another embodiment, the UE may report its capability of minimum processing delay of CJT-CSI report (Z, Z').

[0221] In one implementation, the UE may report multiple pairs of (Z, Z') for different numbers of TRPs. For example, a UE supporting CJT with up to 4 TRPs may report 3 pairs of (Z, Z') for CJT based on 2TRP, 3TRP, and 4TRP, respectively.

[0222] 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 applied to CJT-CSI reporting with different numbers of TRPs.

[0223] In another implementation, the UE may report a pair of (Z, Z') assuming a number of TRPs (e.g., 2 TRPs). For CJT-CSI with a different number of TRPs, the minimum processing delay may be determined based on the number of TRPs and the reported (Z, Z'), e.g., 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.

[0224] Unless otherwise specifically noted, terms such as "establishing", "receiving", "transmitting", etc. 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.

[0225] 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.

[0226] 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.

[0227] 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 range of equivalents to which the claims are authorized.

[0228] 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 "includes", "including", "includes", and / or "including" 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.

[0229] It can also be noted that in some alternative implementations, the functions / actions 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.

[0230] Although 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 processing operations to occur at various intervals associated with the process.

[0231] 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 given 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 can be configured 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, and the like. The recitation that a unit / circuit / component is "configured to" perform one or more tasks, or "can be configured 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 the ability to be configured to perform the disclosed functions.

[0232] 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 embodiments of the present invention are considered to be illustrative and not restrictive, and the disclosure is not 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. UE capability to transmit channel state information (CSI) reports based on codebooks for high / medium UE speeds; b. Decoding control signaling of a CSI report configuration for CSI reporting using a codebook, wherein the codebook is configured for CSI measurement based on more than one instance of at least one CSI-RS configured as a channel measurement resource (CMR), an interference measurement resource (IMR), and a time instance for CSI measurement; c. Receiving CMR and IMR for CSI measurement at the corresponding time instance; d. Measuring the precoder based on at least one time instance of at least one CMR and at least one layer indicator (LI) and / or channel quality indicator (CQI) based on at least one instance of the CMR; e. Transmitting a CSI report including at least one of the measured precoder, CQI, and LI.

[0235] Example 2 is a device according to Example 1, wherein the number of instances of CMR used for CSI measurement can be configured through RRC signaling.

[0236] Example 3 is the apparatus of Example 1, wherein the number of instances of CMRs used for CSI measurement may be configured via a MAC CE.

[0237] Example 4 is a device according to Example 1, wherein the number of instances of CMRs used for CSI measurement can be configured through DCI.

[0238] Example 5 is a device according to Example 1, wherein the UE may report the number of instances of the CMR used for CSI measurement in the CSI report.

[0239] Example 6 is the apparatus of Example 1, wherein the number of time domain bases of the codebook for high / medium UE speed is configurable via RRC signaling.

[0240] Example 7 is the apparatus of Example 1, wherein the CSI measurement scheme may be configured through RRC signaling, wherein a first scheme is to measure the CSI based on an actual CMR instance, and a second scheme is to measure the CSI based on a virtual CMR instance.

[0241] Example 8 is a device according to Example 7, wherein for the second CSI measurement scheme, the starting offset of the first virtual CMR instance and the interval between two consecutive instances can be configured through RRC signaling.

[0242] Example 9 is an apparatus according to Example 1, wherein the aperiodic CSI-RS with multiple instances can be triggered by DCI.

[0243] Example 10 is a device according to Example 9, wherein the number of instances of the non-periodic CSI-RS resource and the interval between two consecutive instances can be configured through RRC signaling.

[0244] Example 11 is a device according to Example 9, wherein the number of instances of the non-periodic CSI-RS resource and the interval between two consecutive instances can be configured through DCI.

[0245] Example 12 is an apparatus according to Example 9, wherein the aperiodic CSI resource set having CSI-RS resources from the same port and a gap between two consecutive CSI-RS resources is triggered by DCI.

[0246] Example 13 is the apparatus of Example 12, wherein whether the CSI-RS resources in the non-periodic resource set are from the same port is configured through RRC signaling.

[0247] Example 14 is a device according to Example 12, wherein the interval between two consecutive CSI-RS resources in the non-periodic resource set is configured through RRC signaling.

[0248] Example 15 is the apparatus of Example 1, wherein the UE reports the LI and the CQI corresponding to one CMR instance.

[0249] Example 16 is the apparatus of Example 15, wherein the CMR index may be a first or last CMR index.

[0250] Example 17 is the apparatus of Example 15, wherein the CMR index may be configured via RRC signaling.

[0251] Example 18 is the apparatus of Example 15, wherein the CMR index may be reported by the UE.

[0252] Example 19 is the apparatus of Example 1, wherein the UE reports more than one LI and CQI corresponding to more than one CMR instance.

[0253] Example 20 is the apparatus of Example 19, wherein the UE reports the LI and the CQI corresponding to each CMR instance.

[0254] Example 21 is the apparatus of Example 19, wherein the UE reports more than one LI and CQI corresponding to a CMR instance having a highest energy or a lowest energy among the CMR instances. BS Example:

[0255] Example 1 is a device comprising a processor configured to cause a base station (BS): a. UE capability to decode channel state information (CSI) reports based on a codebook for high / medium UE speeds; b. Control signaling for transmitting a CSI report configuration for CSI reporting using a codebook, wherein the codebook is configured for CSI measurement based on more than one instance of at least one CSI-RS configured as a channel measurement resource (CMR), an interference measurement resource (IMR), and a time instance for CSI measurement; c. Transmit CMR and IMR; d. Decoding the CSI report based on the corresponding CSI report configuration; e. Determine the time instance of the CMR for the decoded CSI report; f. Identify a precoder and modulation and coding scheme (MCS) for a physical downlink shared channel (PDSCH) transmission in the time instance based on the determined time instance of the decoded CSI and CMR.

[0256] Example 2 is a device according to Example 1, wherein the number of instances of CMR used for CSI measurement can be configured through RRC signaling.

[0257] Example 3 is the apparatus of Example 1, wherein the number of instances of CMRs used for CSI measurement may be configured via a MAC CE.

[0258] Example 4 is a device according to Example 1, wherein the number of instances of CMRs used for CSI measurement can be configured through DCI.

[0259] Example 5 is the apparatus of Example 1, wherein the BS may decode a number of instances of a CMR for CSI measurement in a CSI report.

[0260] Example 6 is the apparatus of Example 1, wherein the number of time domain bases of the codebook for high / medium UE speed is configurable via RRC signaling.

[0261] Example 7 is the apparatus of Example 1, wherein the CSI measurement scheme may be configured through RRC signaling, wherein a first scheme is to measure the CSI based on an actual CMR instance, and a second scheme is to measure the CSI based on a virtual CMR instance.

[0262] Example 8 is a device according to Example 7, wherein for the second CSI measurement scheme, the starting offset of the first virtual CMR instance and the interval between two consecutive instances can be configured through RRC signaling.

[0263] Example 9 is an apparatus according to Example 1, wherein the aperiodic CSI-RS with multiple instances can be triggered by DCI.

[0264] Example 10 is a device according to Example 9, wherein the number of instances of the non-periodic CSI-RS resource and the interval between two consecutive instances can be configured through RRC signaling.

[0265] Example 11 is a device according to Example 9, wherein the number of instances of the non-periodic CSI-RS resource and the interval between two consecutive instances can be configured through DCI.

[0266] Example 12 is an apparatus according to Example 9, wherein the aperiodic CSI resource set having CSI-RS resources from the same port and a gap between two consecutive CSI-RS resources is triggered by DCI.

[0267] Example 13 is the apparatus of Example 12, wherein whether the CSI-RS resources in the non-periodic resource set are from the same port is configured through RRC signaling.

[0268] Example 14 is a device according to Example 12, wherein the interval between two consecutive CSI-RS resources in the non-periodic resource set is configured through RRC signaling.

[0269] Example 15 is the apparatus of Example 1, wherein the BS may decode the LI and CQI corresponding to one CMR instance.

[0270] Example 16 is the apparatus of Example 15, wherein the CMR index may be a first or last CMR index.

[0271] Example 17 is the apparatus of Example 15, wherein the CMR index may be configured via RRC signaling.

[0272] Example 18 is the apparatus of Example 15, wherein the BS may decode the CMR index in the CSI report.

[0273] Example 19 is the apparatus of Example 1, wherein the BS may decode more than one LI and CQI corresponding to more than one CMR instance in the CSI report.

[0274] Example 20 is the apparatus of Example 19, wherein the BS may identify the LI and CQI corresponding to each CMR instance.

[0275] Example 21 is the apparatus of Example 19, wherein the BS may identify more than one LI and CQI corresponding to a CMR instance having a highest energy or a lowest energy among the CMR instances.

Claims

1. A method for wireless communication by a user equipment (UE), the method comprising: receiving a configuration message from a network entity, wherein the configuration message configures a channel state information (CSI) report based on at least one channel measurement resource (CMR); performing, by the UE device, measurements of the at least one CMR at a plurality of time instances according to the configuration message; as well as The CSI report based on the measurements of the at least one CMR at the plurality of time instances is transmitted to the network entity.

2. The method of claim 1, wherein the performing comprises: Measurement of a plurality of CMRs including the at least one CMR and at least one interference measurement resource (IMR) is performed by the UE device at the plurality of time instances to generate the CSI report.

3. The method according to claim 1 or 2, further comprising: An indication of a capability of CSI reporting based on an aperiodic CSI reference signal (CSI-RS) is transmitted to the network entity.

4. The method of any one of claims 1 to 3, wherein the receiving comprises: The configuration message is received from the network entity, the configuration message configuring the number of CMR instances for layer indicator (LI) or channel quality indicator (CQI) reporting.

5. The method according to one of claims 2 to 3, further comprising: generating the CSI report in a single report reflecting time domain variations of the plurality of CMRs when the UE device speed exceeds a threshold speed; Wherein transmitting the CSI report comprises transmitting the single report of the CSI report to the network entity.

6. The method of claim 1 , further comprising transmitting to the network entity an indication of a capability to report the CSI report, the indication of the capability comprising at least one of: a maximum number of instances of channel state information reference signal (CSI-RS) resources that the UE device can measure for the CSI report; The number of CSI processing unit CPUs occupied by CSI-RS with multiple instances; The upper limit of the number of information elements (IEs) configured in the CSI report; a minimum processing delay of the CSI report defined by parameters Z and Z'; or Whether to support CSI prediction based on virtual CMR instances.

7. The method of claim 6, wherein the indication of the capability to report the CSI report comprises: An indication to the UE device that CSI prediction based on a virtual CMR instance is supported.

8. The method of claim 7, wherein receiving the configuration message comprises: A configuration message is received from the network entity, the configuration message configuring the CSI report to include the CSI prediction based on the virtual CMR instance.

9. The method of claim 6, wherein the configuration message includes an indication of whether the UE device reports a channel quality indicator (CQI) from one CMR instance or multiple CMR instances.

10. The method of claim 1, further comprising: Downlink control information (DCI) is received from the network entity for triggering a channel state information reference signal (CSI-RS) set having CSI-RS resources associated with the same configuration.

11. The method of claim 10, wherein the same configuration comprises a same set of CSI-RS resources associated with an aperiodic CSI-RS configuration.

12. The method of claim 1, wherein the configuration message comprises at least one of: the number of instances of a channel state information reference signal (CSI-RS) for use in the CSI report; The number of time domain bases; Scheme for CSI measurement; or Codebook configuration.

13. The method of claim 12, wherein the scheme for CSI measurement comprises a scheme based on a plurality of virtual CMRs and a plurality of actual CMRs measured before a minimum processing delay of the CSI report.

14. A method for wireless communication by a network entity, the method comprising: receiving, from a user equipment (UE) device, an indication of capability for CSI reporting based on an aperiodic channel state information (CSI) reference signal (CSI-RS); In response to receiving the indication, transmitting a configuration message to the UE device, the configuration message configuring a channel state information (CSI) report based on at least one channel measurement resource (CMR); as well as The CSI report is received from the UE device, the CSI report comprising measurements of at least one CMR at a plurality of time instances performed in accordance with the configuration message.

15. The method of claim 14, wherein the transmitting comprises: The configuration message is transmitted to the UE device, the configuration message configuring the number of CMR instances for layer indicator (LI) or channel quality indicator (CQI) reporting.

16. The method of claim 14, further comprising receiving, from the UE device, an indication of a capability to report the CSI report, the indication of the capability comprising at least one of: a maximum number of instances of channel state information reference signal (CSI-RS) resources that the UE device can measure for the CSI report; The number of CSI processing unit CPUs occupied by CSI-RS with multiple instances; The upper limit of the number of information elements (IEs) configured in the CSI report; a minimum processing delay of the CSI report defined by parameters Z and Z'; or Whether to support CSI prediction based on virtual CMR instances.

17. The method of claim 16, wherein the indication of the capability to report the CSI report comprises: An indication to the UE device that CSI prediction based on a virtual CMR instance is supported.

18. The method of claim 17, wherein transmitting the configuration message comprises: A configuration message is transmitted to the UE device, the configuration message configuring the CSI report to include the CSI prediction based on the virtual CMR instance.

19. The method of claim 16, wherein the configuration message includes an indication to the UE device whether to report a channel quality indicator (CQI) from one CMR instance or multiple CMR instances based on the capability.

20. The method of claim 14, further comprising: Downlink control information (DCI) is transmitted to the UE device for triggering a channel state information reference signal (CSI-RS) set having CSI-RS resources associated with the same configuration.

21. The method of claim 20, wherein the same configuration comprises a same set of CSI-RS resources associated with an aperiodic CSI-RS configuration.

22. The method of claim 14, wherein the configuration message comprises at least one of: the number of instances of a channel state information reference signal (CSI-RS) for use in the CSI report; The number of time domain bases; Scheme for CSI measurement; or Codebook configuration.

23. 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 of any one of claims 1 to 22.

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