Feedback of channel state information for multiple channel measurement resources by fast moving devices - Patents.com

Abstract

An exemplary method and system for wirelessly communicating channel status information (CSI) feedback for multiple channel measurement resources (CMRs) is presented, such as when a user equipment (UE) is moving above a threshold speed relative to a network entity (NE). An exemplary wireless communication method by a UE device receives a configuration message from the NE that configures the UE device to generate a channel status information CSI report based on at least one channel measurement resource CMR. The UE device performs measurements of at least one channel measurement resource CMR on multiple time instances according to the configuration message. The UE device generates CSI reports based on measurements of at least one CMR in multiple time instances. The UE device sends CSI reports to the network entity.

Description

[Technical Field]

[0001] TECHNICAL FIELD This disclosure relates generally to channel state information (CSI) feedback. [Background technology]

[0002] (CROSS-REFERENCE TO RELATED APPLICATIONS) This application claims priority to and the benefit of International Application No. PCT / CN2022 / 112307, entitled "CHANNEL STATE INFORMATION FEEDBACK ON MULTIPLE CHANNEL MEASUREMENT RESOURCES OR COHERENT JOINT TRANSMISSION," filed August 12, 2022, pursuant to Article 8 of the Patent Cooperation Treaty (PCT), which is expressly incorporated herein by reference in its entirety.

[0003] The 3rd Generation Partnership Project (3GPP®) is currently in the process of specifying a new air interface called 5G New Radio (5G NR) and a Next-Generation Packet Core Network (NG-CN or NGC). The 5G NR architecture has three components: a 5G Radio Access Network (5G-RAN), a 5G Core Network (5GC), and a User Equipment (UE). To facilitate the realization of different data services and requirements, 3GPP® 5G NR cellular networks support network slicing, which enables the multiplexing of independent virtualized logical networks over the same physical network infrastructure. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2022 / 168874 Summary of the Invention [Problem to be solved by the invention]

[0005] Channel state information (CSI) may be obtained from measurements based on a single CSI-RS instance or on the averaging of multiple CSI-RS instances. This type of CSI cannot reflect the time-domain variations of the channel. Such a CSI reporting mechanism may not work well for high / medium speed user equipment (UE) because a single CSI-RS instance cannot provide enough information to ascertain the dynamic aspects of the channel conditions (e.g., when the UE is moving at speeds above 30 km / h).

[0006] On the other hand, when multiple transmit / receive points (TRPs) are involved, configuring a channel state information (CSI) framework to support channel state information (CSI) reporting for coherent joint transmission (CJT) of multiple transmit / receive point (TRP) TRPs may face technical issues and challenges. [Means for solving the problem]

[0007] The present disclosure provides methods and systems for channel state information (CSI) feedback for high and medium speed user equipment (UE). Exemplary methods and techniques include providing control signaling to trigger multiple instances of aperiodic channel state information reference signals (CSI-RS) for channel state information CSI measurements, identifying time instances for the channel state information CSI measurements, and determining layer indicators (LIs) and channel quality indicators (CQIs) to be reported in the channel state information CSI.

[0008] In a general aspect, an exemplary method of wireless communication by a user equipment (UE) device includes receiving a configuration message from a network entity that configures a channel state information (CSI) report based on at least one channel measurement resource (CMR). The user equipment UE device performs measurements of the at least one channel measurement resource CMR at multiple time instances in accordance with the configuration message. The user equipment UE device transmits a channel state information CSI report to the network entity based on the measurements of the at least one channel measurement resource CMR at the multiple time instances.

[0009] In some embodiments, the user equipment (UE) device performs measurements of a plurality of channel measurement resources (CMRs) including at least one channel measurement resource (CMR) and at least one interference measurement resource (IMR) at a plurality of time instances to generate a channel state information (CSI) report.

[0010] In some implementations, a user equipment (UE) device transmits an indication of aperiodic channel state information reference signal (CSI-RS) based channel state information (CSI) reporting capability.

[0011] In some embodiments, a user equipment (UE) device receives a configuration message from a network entity that configures a number of channel measurement resource (CMR) instances for layer indicator (LI) or channel quality indicator (CQI) reporting. In some cases, the user equipment (UE) device generates a channel state information (CSI) report in a single report that reflects time-domain variations of multiple channel measurement resources (CMRs) when the user equipment (UE) device exceeds a threshold speed. The user equipment (UE) device is enabled to transmit the channel state information (CSI) report by transmitting the single report of the channel state information (CSI) report to the network entity.

[0012] In some embodiments, the user equipment (UE) device transmits to a network entity an indication of capability to report channel state information (CSI) reporting, the indication including at least one of a maximum number of instances of channel state information reference signal (CSI-RS) resources on which the user equipment (UE) device is enabled to measure channel state information (CSI) reporting, a number of channel state information (CSI) processing units (CPUs) occupied by a channel state information reference signal (CSI-RS) having multiple instances, an upper limit on the number of information elements (IEs) in a channel state information (CSI) reporting configuration, a minimum processing delay defined by parameters Z and Z′ for channel state information (CSI) reporting, or whether channel state information (CSI) prediction based on a virtual channel measurement resource (CMR) instance is supported. In some cases, the indication of capability to report channel state information (CSI) reporting includes an indication that the user equipment (UE) device supports channel state information (CSI) prediction based on a virtual channel measurement resource (CMR) instance.

[0013] In some cases, receiving the configuration message includes receiving a configuration message from a network entity that configures channel state information (CSI) reporting to include channel state information (CSI) predictions based on a virtual channel measurement resource (CMR) instance. In some cases, the configuration message includes an indication of whether the user equipment (UE) device reports channel quality indicators (CQIs) from one or more channel measurement resource (CMR) instances based on capabilities.

[0014] In some implementations, a user equipment (UE) device receives downlink control information (DCI) from a network entity to trigger a set of channel state information reference signals (CSI-RS) having channel state information reference signal (CSI-RS) resources associated with a same configuration, which may include the same channel state information reference signal (CSI-RS) resource set associated with an aperiodic channel state information reference signal (CSI-RS) configuration.

[0015] In some embodiments, the configuration message includes at least one of a number indicating multiple instances of channel state information reference signals (CSI-RS) to use in the channel state information CSI report, a number of time-domain bases, a channel state information CSI measurement scheme, or a codebook configuration. In some cases, the channel state information CSI measurement scheme includes a scheme based on multiple virtual channel measurement resources (CMR) and multiple actual channel measurement resources (CMR) measured before a minimum processing delay of the channel state information CSI report.

[0016] In another general aspect, a method of wireless communication by a network entity includes receiving, from a user equipment (UE) device, an indication of channel state information (CSI) reporting capabilities based on aperiodic channel state information reference signals (CSI-RS). In response to receiving the indication, the network entity transmits to the user equipment (UE) device a configuration message configuring channel state information (CSI) reporting based on at least one channel measurement resource (CMR). The network entity receives, from the user equipment (UE) device, a channel state information (CSI) report including measurements of the at least one channel measurement resource (CMR) at multiple time instances performed by the user equipment (UE) device in accordance with the configuration message.

[0017] In yet another general aspect, an exemplary user equipment (UE) device or network entity comprises one or more radio frequency (RF) modems, a processor coupled to the one or more radio frequency RF modems, and at least one memory storing executable instructions, the executable instructions configured to operate the processor or at least one of the one or more radio frequency RF modems to perform an exemplary method herein.

[0018] Details of the method (and related systems and techniques) are described in detail below. The described embodiments and their advantages will be best understood by referring to the following description in conjunction with the accompanying drawings, which are not intended to limit any changes in form and detail that may be made to the described embodiments by those skilled in the art without departing from the spirit and scope of the described embodiments. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a block diagram illustrating an example framework for channel state information (CSI), according to some embodiments. [Figure 2] 1 is an example illustrating channel state information CSI processing unit (CPU) occupancy rules for periodic or semi-persistent channel state information CSI reporting, according to some embodiments. [Figure 3] 1 is an example illustrating channel state information CSI processing unit (CPU) occupancy rules for aperiodic channel state information CSI reporting, according to some embodiments. [Figure 4] 1 illustrates an example mechanism for single channel state information CSI reporting of multiple channel state information CSI measurements for high or medium velocity user equipment UE, according to some embodiments. [Figure 5] 1 is a flow diagram illustrating a method of wireless communication by a user equipment (UE) device, according to some embodiments. [Figure 6]FIG. 1 illustrates an example call flow diagram for enhancing aperiodic channel state information (CSI) feedback to support high / medium speed user equipment (UE) devices, according to some embodiments. [Figure 7] 1 illustrates an exemplary scheme using time-domain interpolation, according to some embodiments. [Figure 8] 1 is a flow diagram illustrating a method of wireless communication by a user equipment (UE) device, according to some embodiments. [Figure 9] 1 is a flow diagram illustrating a method of wireless communication by a network entity, according to some embodiments. [Figure 10] FIG. 1 illustrates an example call flow diagram for enhancing aperiodic and semi-persistent channel state information (CSI) feedback to support high / medium speed user equipment (UE) devices, according to some embodiments. [Figure 11] 1 is an example illustrating coherent joint transmission (coherent joint transmission CJT) according to some embodiments. [Figure 12] 1 is a flow diagram illustrating a method for channel measurement resource (CMR) / interference measurement resource (IMR) configuration CSI reporting for coherent joint transmission (CJT)_channel state information (CSI) reporting by a user equipment (UE) device according to some embodiments. [Figure 13] 1 illustrates an example call flow diagram for coherent joint transmit CJT_CSI reporting, according to some embodiments. [Figure 14] 1 is a flow diagram illustrating a method for coherent joint transmission CJT_CSI reporting by a user equipment (UE) device according to some embodiments. [Figure 15] 1 is a flow diagram illustrating a method for coherent joint transmission CJT_CSI reporting by a network entity according to some embodiments. [Figure 16] 1 illustrates an example of a channel state information (CSI) framework for coherent joint transmission (CJT) and association, according to some embodiments. [Figure 17] 1 illustrates an example of a channel state information CSI framework for channel measurement resource CMR / interference measurement resource IMR configuration and association for coherent joint transmission CJT-CSI reporting according to some embodiments. [Figure 18] 1 illustrates an example of a channel state information CSI framework for channel measurement resource CMR / interference measurement resource IMR configuration and association for coherent joint transmission CJT-CSI reporting according to some embodiments. [Figure 19] 10 illustrates an example of an aperiodic channel state information CSI trigger state configuration according to some embodiments. DETAILED DESCRIPTION OF THE INVENTION

[0020] To facilitate explanation, the following technology is described in the exemplary context in which one or more user equipment (UE) devices and a radio access network (RAN) implement one or more radio access technologies (RATs) including at least a fifth-generation (5G) New Radio (NR) standard (e.g., 3rd Generation Partnership Project (3GPP®) Release 15, 3GPP® Release 16, etc.) (hereinafter, “5G_NR” or “5G_NR standard”). However, the present disclosure is not limited to networks employing a 5G_NR_RAT configuration. Rather, the technology described herein is enabled to be applied to any combination of different radio access technologies (RATs) employed by user equipment (UE) devices and a radio access network (RAN). Furthermore, the present disclosure is not limited to the examples and context described herein; rather, the technology described herein is enabled to be applied to any network environment.

[0021] The present disclosure provides a method and system for wireless communication of channel state information (CSI) feedback regarding multiple channel measurement resources by a fast-moving device. For example, a user equipment (UE) transmits an indication of a capability of aperiodic channel state information reference signal (CSI-RS)-based channel state information CSI reporting. The user equipment UE device receives a configuration message from a network entity to configure channel state information CSI reporting based on at least one channel measurement resource (CMR). The user equipment UE device performs measurements of the at least one channel measurement resource CMR at multiple time instances in accordance with the configuration message (e.g., measurements over multiple time instances enable the state of the fast-moving user equipment UE device to be reflected). The user equipment UE device performs measurements of multiple channel measurement resources CMRs, including at least one channel measurement resource CMR and at least one interference measurement resource (IMR), at multiple time instances to generate a channel state information CSI report. The user equipment UE device transmits the channel state information CSI report to the network entity based on measurements of the at least one channel measurement resource CMR at the multiple time instances.

[0022] 1 is a block diagram illustrating an example framework 100 for channel state information (CSI), according to some embodiments. For a multiple-input multiple-output (MIMO) system, channel state information (CSI) is key information for a base station gNB (used interchangeably herein with base station (BS), network entity, etc.) to select a digital precoder for a user equipment UE.

[0023] Typically, a base station gNB can configure channel state information (CSI) reporting by radio resource control (RRC) signaling channel state information CSI-ReportConfig 101, where channel state information reference signals (CSI-RS) are used as channel measurement resources (CMR) 103 for user equipment (UE) to measure downlink channels. Meanwhile, the base station gNB can configure several interference measurement resources (IMR) for user equipment (UE) to measure interference in the channel state information CSI-ReportConfig 101. One channel measurement resource CMR 103, e.g., one resource configured in resourcesForChannelMeasurement, can be associated with one zero-power interference measurement resource IMR (ZP-IMR) 107, e.g., one resource configured in csi-IM-ResourcesForInterference, and / or one non-zero-power interference measurement resource IMR (NZP-IMR) 109, e.g., one resource configured in nzp-CSI-RS-ResourcesForInterference. In one example, the non-zero power NZP-interference measurement resource IMR 109 may be used for intra-cell interference measurements, and the zero power ZP-interference measurement resource IMR 107 may be used for inter-cell interference measurements. In the case of user equipment UE with multi-beam operation, the user equipment UE may receive the channel measurement resource CMR 103 as well as the associated interference measurement resource(s) IMR(s) 107, 109 using the same beam.

[0024] By utilizing the associated channel measurement resource (CMR) and interference measurement resource (IMR)(ies), the user equipment (UE) can identify channel state information (CSI), which may include a rank indicator (RI), a precoder matrix indicator (PMI), a channel quality indicator (CQI), and a layer indicator (LI). The rank indicators RI and PMI are used to determine the digital precoder, the channel quality indicator CQI is used to reflect the signal-to-interference-plus-noise (SINR) status to help the base station (gNB) decide the modulation and coding scheme (MCS), and the layer indicator LI is used to identify the strongest layer, which may be useful for MU-MIMO pairing with transmission at low rank and precoder selection for phase tracking reference signal (PT-RS). In the case of a channel state information CSI-ReportConfig101 in which multiple channel measurement resources CMR103 have been configured, the user equipment UE is enabled to report a channel state information reference signal CSI-RS resource indicator (CRI) associated with the reported rank indicator RI / PMI / channel quality indicator CQI / layer indicator LI to inform the base station gNB from which channel measurement resource CMR the channel state information CSI has been measured.

[0025] The base station gNB may configure time domain behavior, e.g., periodic / semi-persistent / aperiodic reporting, for channel state information CSI reporting in the channel state information CSI-ReportConfig. The base station gNB is enabled by the MAC control element (CE) to activate or deactivate semi-persistent channel state information CSI reporting. The base station gNB may trigger aperiodic channel state information CSI reporting by downlink control information (DCI). The user equipment UE is enabled to report periodic channel state information CSI by a physical uplink control channel (PUCCH) resource configured in the channel state information CSI-ReportConfig. The user equipment UE is enabled to report semi-persistent channel state information CSI by a physical uplink control channel PUCCH resource configured in the channel state information CSI-ReportConfig, or by a physical uplink shared channel (PUSCH) resource triggered by the downlink control information DCI by the base station gNB. The user equipment UE is enabled to report aperiodic channel state information CSI via physical uplink shared channel PUSCH resources triggered by downlink control information DCI by the base station gNB.

[0026] 3GPP® technical specifications (eg, Release 15, i.e., Rel-15 and later) provide the following types of channel state information reference signals CSI-RS for physical layer (eg, Layer 1) related measurements:

[0027] The CSI-RS for tracking is also called the tracking reference signal (TRS). It is the CSI-RS resource set for which the radio resource control (RRC) parameter TRS-Info is configured. The tracking reference signal TRS is used for time / frequency offset tracking.

[0028] CSI-RS (Channel State Information Reference Signal) for Beam Management (BM). CSI-RS (Channel State Information Reference Signal) for beam management BM is configured in a CSI-RS resource set for which the radio resource control (RRC) parameter repetition is configured.

[0029] A channel state information reference signal CSI-RS for acquiring channel state information CSI. This is a channel state information reference signal CSI-RS used for measuring and reporting channel state information CSI. The channel state information reference signal CSI-RS for acquiring channel state information CSI is configured in a channel state information reference signal CSI-RS resource set in which the radio resource control (RRC) parameters TRS-Info and repetition are not configured.

[0030] In this disclosure, unless otherwise specified, the channel state information reference signal CSI-RS refers to the channel state information reference signal CSI-RS for acquiring the channel state information CSI. Since Rel-15, a type-2 channel state information CSI codebook for channel state information (CSI) reporting has been introduced for user equipment (UE) to measure and report channel state information (CSI), in which the precoder is quantized as follows: W=W1W2 In the formula, W1 is N Tx × 2L, W2 is a wideband precoder with dimension 2L × v, where L denotes the number of beams, v denotes the number of layers, and it is the rank indicator RI+1.

[0031] While W1 may be quantized based on a codebook, W2 may be quantized based on the power and angle of each element, which may lead to large overhead since W2 is subband-based and there may be multiple subbands for the channel state information (CSI) report, which is determined by the bandwidth of the channel state information reference signal (CSI-RS). In one example, the codebook for W1 selection may be defined as follows:

[0032]

number

[0033] During the ceremony,

[0034]

number

[0035] where m represents the Kronecker product, and L indicates the number of beams configured by radio resource control (RRC) signaling. N1, N2, O1, and O2 are related to the number of ports in the horizontal and vertical domains configured by radio resource control (RRC) signaling and the oversampling factor, and the candidate values can be determined based on the number of channel state information reference signal (CSI-RS) ports. The codebook includes 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.

[0036] The 3GPP® technical specifications (e.g., Release 16, or Rel-16) further introduce an extended type-2 codebook for channel state information CSI reporting of the transmit / receive point TRP, where the precoder may be quantized as follows:

[0037]

number

[0038] where W1 is the same as the Rel-15 Type 2 codebook used to provide the spatial domain basis (SD basis),

[0039]

number

[0040] denotes the broadband beam coupling weight with dimensions 2L × M, and Wf denotes a frequency domain basis (FD basis) of dimension N3 × M, where N3 is the number of subbands and may be derived by the radio resource control RRC parameter numberOfPMI-SubbandsPer channel quality indicator CQI-Subband, and M may be derived by the radio resource control RRC signaling of numberOfPMI-SubbandsPer channel quality indicator CQI-Subband and paramCombination. For details of quantization, refer to section 5.2.2.2.5 of 3GPP_TS_38.214.

[0041] A user equipment (UE) may be configured with multiple channel state information (CSI) CSI-ReportConfigs for multiple channel state information (CSI) measurements and reports. For multiple parallel channel state information (CSI) measurement and reporting, channel state information (CSI) processing units (CPUs) have been introduced since Rel-15. A user equipment (UE) may report the number of CPUs it supports. If the base station (gNB) scheduling results in parallel channel state information (CSI) processing more than the number of supported CPUs, the user equipment (UE) may report older channel state information (CSI) for lower-priority channel state information (CSI) reports, where the priority is calculated according to Section 5.2.5 of 3GPP_TS_38.214. CPU occupancy rules for periodic / semi-persistent / aperiodic channel state information (CSI) reporting are defined, for example, in Section 5.2.1.6 (CSI Processing Standard) of 3GPP_TS_38.214.

[0042] 2 is an exemplary diagram 200 illustrating channel state information CSI processing unit (CPU) occupancy rules for periodic or semi-persistent channel state information CSI reporting. FIG. 3 is an exemplary diagram 300 illustrating channel state information CSI processing unit (CPU) occupancy rules for aperiodic channel state information CSI reporting. In FIG. 2, periodic or semi-persistent channel state information CSI reports 245 (excluding the first semi-persistent channel state information CSI report for the physical uplink shared channel (PUSCH) after the PDCCH triggers the report) occupy the CPU(s) from the first symbol of the earliest of each channel state information reference signal (CSI-RS) / channel state information (CSI-IM) / synchronization signal block (SSB) resource for channel or interference measurement, up to the corresponding channel state information CSI reference resource, until the last symbol of each latest channel state information reference signal (CSI-RS) / channel state information (CSI-IM) / SSB opportunity, and then to the last symbol of the configured physical uplink shared channel (PUSCH) / physical uplink control channel (PUCCH) transmitting the report.

[0043] 3, the aperiodic channel state information CSI report 345 occupies the CPU(s) from the first symbol after the PDCCH 322 triggers the channel state information CSI report to the last symbol of the scheduled physical uplink shared channel PUSCH carrying the report. As described in Clause / Section 10.1 of 3GPP_TS_38.213 (see also Section 6 of TS_38.213), if a PDCCH reception includes two PDCCH candidates from two respective search space sets, the PDCCH candidate that ends later in time is used for the purpose of determining the CPU occupancy period.

[0044] An initial semi-persistent channel state information (CSI) report on the physical uplink shared channel (PUSCH) after a PDCCH trigger occupies the CPU(s) from the first symbol after the PDCCH to the last symbol of the scheduled physical uplink shared channel (PUSCH) carrying the report. As described in Clause / Section 10.1 of 3GPP TS 38.213 (see also Section 6 of TS 38.213), if the reception of a PDCCH includes two PDCCH candidates from two respective search space sets, the PDCCH candidate that ends later in time is used for the purpose of determining the CPU occupancy period.

[0045] Furthermore, two minimum processing delays for channel state information (CSI) reporting are defined as follows, and scheduling of channel state information (CSI) reporting may comply with the minimum processing delays Z and Z′. Candidate values of Z and Z′ for various types of channel state information (CSI) reporting are defined in Section 5.4 of 3GPP_TS_38.214. If the scheduling offset does not comply with the minimum Z and Z′, the user equipment (UE) may report outdated channel state information (CSI) or may ignore the downlink control information (DCI) if no other signals, such as data and HARQ-ACK, are transmitted on the physical uplink shared channel (PUSCH) triggered by the downlink control information (DCI).

[0046] If the channel state information CSIrequest field of the downlink control information DCI triggers channel state information CSI report(s) on the physical uplink shared channel PUSCH, the user equipment UE shall provide a valid channel state information CSI report for the n-th triggered report.

[0047] The first uplink symbol carrying the corresponding channel state information CSI report(s) including the effect of the timing advance is symbol Z. ref If you don't start earlier than The first uplink symbol carrying the nth channel state information (CSI) report including the effect of timing advance is symbol Z′ ref If it does not start earlier than (n).

[0048] 4 illustrates an exemplary mechanism 400 for a single channel state information CSI report 445 of multiple channel state information CSI measurements for a high or medium speed user equipment UE, according to some embodiments. The channel state information CSI extension for a high / medium speed user equipment UE, e.g., a user equipment UE having a moving speed of more than 30 km / h (or a threshold speed) relative to a network entity (e.g., a base station BS), may be used, and the user equipment UE may be performing measurements on multiple channel measurement resource CMR instances 403 and be enabled to report channel state information CSI based on the measurements as shown.

[0049] Since the position of the user equipment UE does not change within a short time, e.g., within a few slots, the SD / FD basis does not change, and only the beam-combining weights may change. For a channel measurement resource CMR instance t, the user equipment UE may select a precoder as

[0050]

number

[0051] t -N4+1 , t -N4+2 , . . . t0, the selected precoders for the N4 channel measurement resource CMR instances can be expressed as follows:

[0052]

number

[0053] The precoder W may then be compressed as follows:

[0054]

number

[0055] In the formula, W td denotes a matrix having a T time-domain basis (TD basis) with dimensions N4 × T,

[0056]

number

[0057] denotes the new beam combination weight of an N4 channel measurement resource CMR instance having a dimension of 2L×M*T. The TD basis can also be expressed as a Doppler domain basis (DD basis).

[0058] For channel state information (CSI) measurements at high / medium speeds, the first issue concerns the control signaling that triggers multiple instances of aperiodic channel state information reference signals (CSI-RS) when the channel measurement resource (CMR) is configured as the channel measurement resource (CMR) for channel state information (CSI) feedback. The second issue concerns how to maintain the same understanding between the base station (gNB) and the user equipment (UE) about the time instances of channel state information (CSI) feedback. The third issue concerns how to calculate other channel state information (CSI) components, such as the layer indicator (LI) and the channel quality indicator (CQI), based on multiple instances of measured precoders and channels.

[0059] 5 is a flow diagram illustrating a method 500 of wireless communication by a user equipment (UE) device, according to some embodiments. The method is performed by processing logic including hardware (e.g., circuits, dedicated logic, programmable logic, processor, processing device, central processing unit, system-on-chip (SoC), etc.), software (e.g., instructions and / or applications executing / running on a processing device), firmware (e.g., microcode), or a combination thereof. Method 500 is performed by a user equipment UE device. The user equipment UE device may include one or more radio frequency (RF) modems, a processor coupled to the one or more radio frequency RF modems, and at least one non-transitory memory storing executable instructions that operate at least one of the processor or the radio frequency RF modem to perform method 500. A network entity may perform a complementary method to interact with a user equipment UE device that performs method 500 (see call flow diagram (600) of FIG. 6).

[0060] With reference to Figure 5, the method illustrates exemplary functions employed by various embodiments. Although specific functional blocks ("blocks") are disclosed in the method, such blocks are examples; that is, the embodiments are well suited to performing various other blocks or variations of the blocks described in the method. It is understood that the blocks of the method may be performed in a different order than presented, and that not all of the blocks of the method may be performed.

[0061] As shown in FIG. 5, method 500 includes block 510 of transmitting, by a user equipment (UE) device, an indication to a network entity of a capability to report a channel state information (CSI) report based on signals of a plurality of channel measurement resources (CMRs) or a plurality of transmit / receive points (TRPs) of the network entity.

[0062] The method 500 comprises block 520 receiving a configuration message from a network entity operating in response to an indication sent by the user equipment UE device, the configuration message configuring the user equipment UE device to determine channel state information CSI reporting.

[0063] The method 500 includes a block 530 for performing signal and noise measurements according to the configuration message. For example, the user equipment UE device may perform simultaneous measurements of multiple channel measurement resources (CMRs) and at least one interference measurement resource (IMR) for multiple time instances as configured by the user equipment UE device according to the configuration message. In some cases, the method 500 includes preparing a single channel state information (CSI) report based on the simultaneous measurements, the CSI report reflecting time-domain variations of two or more of the multiple channel measurement resources (CMRs).

[0064] The method includes block 540 of transmitting a channel state information CSI report comprising the performed measurements to a network entity according to the configuration message. For example, the user equipment (UE) device may transmit a single channel state information CSI report comprising the performed simultaneous measurements to the network entity.

[0065] In some aspects, the method 500 further comprises decoding, using a codebook configured for the channel state information CSI measurement, a plurality of instances of a channel state information reference signal (CSI-RS) comprising one or more of a channel measurement resource (CMR), an interference measurement resource (IMR), and a time instance for the channel state information (CSI) measurement based on a configuration message from the network entity. The method 500 also comprises obtaining a precoder value based on at least a tier indicator (LI) or a channel quality indicator (CQI) corresponding to each of two or more of the plurality of channel measurement resources (CMR) and the at least one interference measurement resource (IMR), and transmitting a channel state information (CSI) report to the network entity, wherein the channel state information (CSI) report comprises the precoder and one or both of the tier indicator (LI) and the channel quality indicator (CQI).

[0066] In some embodiments, the method 500 may include performing simultaneous measurements on multiple channel measurement resources (CMRs) and at least one interference measurement resource (IMR) at multiple time instances. The method may include, when the user equipment (UE) device exceeds a threshold speed, determining or generating a single channel state information (CSI) report that reflects time-domain variations for each of two or more of the multiple channel measurement resources (CMRs). The user equipment (UE) device may transmit the single channel state information (CSI) report to a network entity.

[0067] In some embodiments, the configuration message comprises at least one of a radio resource control (radio resource control RRC) message, a medium access control (MAC) control element (MAC_CE), or downlink control information (DCI). The multiple instances of the channel state information reference signal CSI-RS comprise aperiodic or semi-persistent channel state information reference signal CSI-RS.

[0068] In some embodiments, the indication of the capability to report channel state information CSI reports comprises any of: a maximum number of instances of channel state information reference signal CSI-RS resources that the user equipment UE device is enabled to measure for channel state information CSI reports; a number of channel state information CSI processing units (CPUs) occupied by channel state information reference signal CSI-RS having multiple instances; an upper limit on the number of information elements (IEs) for channel state information CSI reporting configuration; a minimum processing delay for channel state information CSI reports; and whether channel state information CSI prediction of channel state information CSI measurements based on virtual channel measurement resource CMR instances is supported.

[0069] In some embodiments, the method 500 may further include receiving downlink control information (DCI) from a network entity to trigger a plurality of channel measurement resources (CMR) and at least one interference measurement resource (IMR), the plurality of channel measurement resources (CMR) comprising a plurality of instances of a channel state information reference signal (CSI-RS).

[0070] In some embodiments, the user equipment UE device may derive the precoder by identifying an instance of a channel state information reference signal CSI-RS as a channel measurement resource CMR and performing channel state information CSI measurements on the instance of the channel state information reference signal CSI-RS.

[0071] In some embodiments, the configuration message may include a number indicating multiple instances of channel state information reference signals CSI-RS to use in the channel state information CSI report, a number of time-domain bases, and a channel state information CSI measurement scheme, which may include a scheme based on multiple virtual channel measurement resources CMR and multiple physical channel measurement resources CMR measured before a minimum processing delay of the channel state information CSI report.

[0072] In some cases, the method 500 may further include transmitting a channel state information CSI report to a network entity, the channel state information CSI report comprising a plurality of measurements of the tier indicator LI and the channel quality indicator CQI based on (1) the channel measurement resource CMR with the most energy among the plurality of channel measurement resources CMR or the channel measurement resource CMR with the least energy among the plurality of channel measurement resources CMR, (2) performance of each of one or more channel measurement resources CMR of the plurality of channel measurement resources CMR, (3) a precoder, (4) minimum and maximum values of the channel quality indicator CQI, or (5) correspondence to the first and last instances of the plurality of channel measurement resources CMR. In some cases, the codebook is for decoding an aperiodic channel state information reference signal CSI-RS used by the user equipment UE device to report the channel state information CSI report when the user equipment UE device is moving at a speed greater than or equal to a threshold speed relative to the network entity.

[0073] 6 shows an example call flow diagram (600) for enhancing aperiodic channel state information CSI feedback to support high / medium speed user equipment UE devices 102, according to some embodiments. Initially, the user equipment UE 102 may report (610) to the base station gNB 104 one or more capabilities indicating support for enhanced aperiodic channel state information CSI feedback for high / medium user equipment UE speed (e.g., a maximum number of instances of aperiodic channel state information reference signal CSI-RS resources that the user equipment UE can measure for enhanced aperiodic channel state information CSI feedback). In some embodiments, the base station gNB may receive the one or more capabilities from a core network (e.g., an Access and Mobility Management Function (AMF)) or another base station gNB.

[0074] After receiving the capability, the base station gNB may transmit a configuration message (e.g., a radio resource control (RRC) Reconfiguration message or a radio resource control (RRCResume) message) to the user equipment (UE) comprising a configuration enabling enhanced aperiodic channel state information (CSI) feedback. For example, the base station gNB transmits a channel state information (CSI) framework configuration for channel state information (CSI) reporting at high / medium user equipment (UE) speeds comprising time instance-related information (620). In some embodiments, the base station gNB may include the configuration in a channel state information (CSI-ReportConfig) ReportConfig_IE and may include the channel state information (CSI-ReportConfig_IE) in a radio resource control (RRC) message.

[0075] After sending the configuration to the user equipment UE 102, the base station gNB104 may send downlink control information DCI to the user equipment UE to trigger multiple instances of aperiodic channel state information reference signals CSI-RS configured as channel measurement resources CMR (622). For example, the base station gNB104 may trigger multiple instances of aperiodic channel state information CSI-RS for aperiodic channel state information CSI reporting and high / medium user equipment UE speeds (622). Thus, the base station gNB104 transmits an aperiodic channel state information reference signal CSI-RS for channel measurement resource CMR(s) instance 1 (624), an aperiodic channel state information reference signal CSI-RS for channel measurement resource CMR(s) instance 2 (626), ..., an aperiodic channel state information reference signal CSI-RS for channel measurement resource CMR(s) instance N4 (628).

[0076] Next, the user equipment UE 102 may perform measurements on multiple instances of the aperiodic channel state information reference signal CSI-RS (630). The user equipment UE obtains or derives a channel estimate and / or a signal-to-signal-to-interference-plus-noise (SINR) from the measurements. The user equipment UE selects a precoder matrix W (e.g., a component of the channel state information CSI) and selects other components of the channel state information CSI, such as a tier indicator LI and a channel quality indicator CQI, based on the selected precoder matrix and the channel estimate. Finally, the user equipment UE reports the channel state information CSI for high / medium user equipment UE speeds (e.g., the aforementioned components) to the base station gNB (640), and the base station gNB performs channel state information CSI decoding (650).

[0077] In an embodiment, the one or more functions comprise at least one of the following functions: (1) a maximum number of instances of aperiodic channel state information reference signal (CSI-RS) resources that the user equipment (UE) is measuring and from which it can obtain channel state information (CSI) for enhanced aperiodic channel state information (CSI) feedback; (2) the maximum number of channel state information CSI-ReportConfigReportConfig_IEs having aperiodic channel state information reference signals CSI-RS; (3) the number of CPUs occupied by the aperiodic channel state information reference signal CSI-RS having multiple instances; and (4) a minimum processing delay defined by parameters Z and Z′ for a channel state information (CSI) report based on an aperiodic channel state information reference signal (CSI-RS) having multiple instances; or (5) Whether to support channel state information (CSI) prediction, for example, channel state information (CSI) measurement based on virtual channel measurement resource (CMR) instances.

[0078] Each, some, or all of the one or more functions described above may be defined or specified per bandwidth portion (BWP), per band, per band combination, or per component carrier (CC), or across component carrier CCs within a band combination.

[0079] In an embodiment, the configuration of the enhanced aperiodic channel state information CSI feedback or channel state information CSI-ReportConfig may include a new codebook configuration of the codebook channel state information CSI-ReportConfig. The new codebook configuration may include at least one of the following configuration parameters:

[0080] · Number of beams (L); · Number of ports in the horizontal and vertical regions (N1, N2); · Number of oversampling factors in the horizontal and vertical domains (O1, O2); · Number of subbands per channel quality indicator CQI calculation, indicating the number of subbands of the channel state information CSI compression used for the channel quality indicator CQI calculation; · Rank indicator RI restriction, used to indicate candidate rank for precoder selection; · N4 value indicating the number of channel measurement resource CMR instances of channel state information CSI reports; · the number of time-domain bases, indicating the value of T; · Channel State Information CSI measurement scheme.

[0081] In some embodiments, the number of channel measurement resource CMR instances may be determined based on the number of triggered aperiodic channel state information reference signal CSI-RS instances configured as channel measurement resources CMR. For example, if the base station gNB triggers N4 instances of aperiodic channel state information reference signal CSI-RS, the number of channel measurement resource CMR instances is N4. Details regarding triggering multiple instances for aperiodic channel state information reference signal CSI-RS are provided in the next embodiment. Therefore, a radio resource control (RRC) parameter regarding the number of channel measurement resource CMR instances may not be provided for aperiodic channel state information reference signal CSI-RS-based channel state information (CSI) reporting.

[0082] Regarding dynamic switching between the legacy codebook and the new codebook for enhanced aperiodic channel state information CSI feedback in some embodiments, in some embodiments, the base station gNB may dynamically update or configure the number of instances (N4) by layer 1 (L1) or layer 2 (L2) signaling, such as MAC_CE or downlink control information DCI. For example, the base station gNB includes an N4 value in a configuration (e.g., a radio resource control (RRC) configuration) for enhanced aperiodic channel state information CSI feedback and transmits MAC_CE or downlink control information DCI including the new N4 value to the user equipment UE to update the N4 value already configured in the radio resource control (RRC) configuration. In another example, the base station gNB transmits MAC_CE or downlink control information DCI including the N4 value to the user equipment UE instead of transmitting a radio resource control (RRC) message including N4 to the user equipment UE. In this example, the configuration for enhanced aperiodic channel state information (CSI) feedback does not include the number of instances (N4).

[0083] In some other embodiments, the number of instances (N4) may be reported by the user equipment UE to the base station gNB. In one embodiment, the user equipment UE determines a number of instances that is less than or equal to the number of instances configured by the base station gNB. In one example, in a channel state information CSI report, the user equipment UE may include a value of N4 and a channel state information CSI component based on the reported N4. If the user equipment UE transmits a channel state information CSI report using a long physical uplink control channel PUCCH format or a physical uplink shared channel PUSCH, the user equipment UE includes the value of N4 in channel state information CSI part 1 of the channel state information CSI report. If the user equipment UE transmits a channel state information CSI report using a short physical uplink control channel PUCCH format, the user equipment UE may not include the value of N4 in the channel state information CSI report. Table 1 shows an example of channel state information CSI part 1 of a channel state information CSI report. In some embodiments, the user equipment UE includes the value of N4 in channel state information CSI part 2 of the channel state information CSI report.

[0084] [Table 1]

[0085] The "Channel State Information CSI Measurement Scheme" may configure the user equipment UE to select one of the following schemes to identify the N4 time instances of the channel state information CSI report:

[0086] Scheme 1: The reported channel state information CSI may be measured based on N4 instances for the channel measurement resource CMR before the minimum processing delay for the channel state information CSI report.

[0087] Scheme 2: The reported channel state information CSI may be measured based on N4 virtual channel measurement resource CMR instances and the actual channel measurement resource CMR for the channel measurement resource CMR before the minimum processing delay for the channel state information CSI report.

[0088] 7 illustrates an example scheme 700 using time-domain interpolation according to some embodiments. As shown, scheme 700 comprises a plurality of actual channel measurement resources CMR 710 and an interference measurement resource IMR 705 for channel state information (CSI) measurements by a user equipment (UE) device before time-domain interpolation. After transmitting a channel state information (CSI) report 720, a plurality of virtual channel measurement resources CMR 730, 732, ..., and 734 separated by a virtual channel measurement resource CMR interval 724 can be used to identify time instances for time-domain interpolation 726. For Scheme 2, the user equipment (UE) needs to apply time-domain interpolation as shown. Some additional parameters may be predefined or configured by radio resource control (RRC) signaling of the channel state information (CSI-ReportConfig), such as: a starting offset 722 of a first virtual channel measurement resource CMR instance 730 for channel state information CSI measurement, the starting offset 722 being used to indicate the time domain position of the starting channel measurement resource CMR instance having the first or last symbol of the channel state information CSI report as reference; Spacing 724 of virtual channel measurement resource CMR instances 730, 732, ... 734 for channel state information CSI measurements, the spacing 724 being used to indicate the spacing between each virtual channel measurement resource CMR instance 730, 732, ... 734; and A number 718 of actual channel measurement resource CMR instances 710 for channel state information CSI measurements, the number 718 being used to indicate the actual channel measurement resource CMR instances for channel state information CSI measurements before time domain interpolation.

[0089] In one example, the starting offset of a virtual channel measurement resource CMR instance may be predefined as X slots after the slot comprising the channel state information CSI report or the first / last symbol of the channel state information CSI report. The virtual channel measurement resource CMR interval may be predefined as X slots. The value of X may be the same as the interval of the actual channel measurement resource CMR. The number of actual channel measurement resource CMR instances may be the same as the number of instances of aperiodic channel state information reference signals CSI-RS triggered for channel state information CSI measurements. In some other embodiments, a channel state information CSI measurement scheme related to a channel measurement resource CMR instance selection may be reported by the user equipment UE. In one example, in a channel state information CSI report, the user equipment UE is enabled to report a channel state information CSI measurement scheme related to a selection of a channel measurement resource CMR instance.

[0090] In an embodiment, the base station gNB may trigger multiple instances of aperiodic channel state information reference signals CSI-RS by downlink control information DCI, for example downlink control information DCI format 0_1 or 0_2.

[0091] In one embodiment, for a channel state information reference signal CSI-RS resource, the base station gNB may configure the number of instances and the interval between two consecutive instances by radio resource control RRC signaling, a radio resource control RRC parameter of non-zero power NZP-CSI-RS-Resource. Then, when such a channel state information reference signal CSI-RS resource is triggered by downlink control information DCI, for example by channel state information CSI_request in the downlink control information DCI field, the base station gNB may transmit the channel state information reference signal CSI-RS at the configured instance, where the time domain location of the first instance is configured by radio resource control RRC signaling. In one example, the following radio resource control RRC parameters nrofInstances and instanceInterval may be introduced to provide a multi-instance aperiodic channel state information reference signal CSI-RS configuration. NZP-CSI-RS-Resource ::= SEQUENCE { nzp-CSI-RS-ResourceId NZP-CSI-RS-ResourceId, resourceMapping CSI-RS-ResourceMapping, powerControlOffset INTEGER (-8..15), powerControlOffsetSS ENUMERATED{db-3, db0, db3, db6} OPTIONAL, -- Need R scramblingID ScramblingId, periodicityAndOffset CSI-ResourcePeriodicityAndOffset OPTIONAL, -- Cond PeriodicOrSemiPersistent qcl-InfoPeriodicCSI-RS TCI-StateId OPTIONAL, -- Cond Periodic nrofInstances INTEGER (2…8) OPTIONAL, instanceInterval INTEGER (2…14) OPTIONAL, … } In another embodiment, the base station gNB is enabled to trigger multiple instances of a channel state information reference signal CSI-RS by triggering a set of channel state information reference signal CSI-RS having channel state information reference signal CSI-RS resources with the same configuration via downlink control information DCI, e.g., the channel state information CSI_request field of the downlink control information DCI. In the channel state information reference signal CSI-RS resource set, a radio resource control RRC parameter may be introduced to indicate that the channel state information reference signal CSI-RS is from the same port, and / or another radio resource control RRC parameter may be introduced to provide an interval between two channel state information reference signal CSI-RS resources. In one example, the following radio resource control RRC parameters samePort and instanceInterval may be introduced to provide a multi-instance aperiodic channel state information reference signal CSI-RS configuration. For channel state information reference signal CSI-RS resources within a resource set, radio resource control RRC parameters other than the nzp-Channel State Information CSI-ResourceId may be the same, or the radio resource control RRC parameters configured for the channel state information reference signal CSI-RS resource with the smallest ID may apply to all channel state information reference signal CSI-RS resources within the resource set. NZP-CSI-RS-ResourceSet ::= SEQUENCE { nzp-CSI-ResourceSetId NZP-CSI-RS-ResourceSetId, nzp-CSI-RS-Resources SEQUENCE (SIZE (1..maxNrofNZP-CSI-RS-ResourcesPerSet)) OF NZP-CSI-RS-ResourceId, repetition ENUMERATED { on, off} OPTIONAL, -- Need S aperiodicTriggeringOffset INTEGER(0..6) OPTIONAL, -- Need S trs-Info ENUMERATED {true} OPTIONAL, -- Need R …, [[ aperiodicTriggeringOffset-r16 INTEGER(0..31) OPTIONAL -- Need S ]], [[ pdc-Info-r17 ENUMERATED {true} OPTIONAL, -- Need R cmrGroupingAndPairing-r17 CMRGroupingAndPairing-r17 OPTIONAL -- Need R ]] samePort ENUMERATED {true} OPTIONAL instanceInterval INTEGER (2…14) OPTIONAL, } In other embodiments, the base station gNB may configure the number of instances of the triggered aperiodic channel state information reference signal CSI-RS resource(s) and / or the interval between two consecutive instances by the downlink control information DCI used to trigger the aperiodic channel state information reference signal CSI-RS resource(s). In one example, one field number_of_instance may be introduced in the downlink control information DCI. In another example, interval_between_two_consecutive_instances_for_a_CSI-RS may be introduced in the downlink control information DCI.

[0092] In an embodiment, after receiving signaling triggering a channel state information CSI report for high / medium user equipment UE speed, the user equipment UE may select a precoder for the target time instance as follows:

[0093]

number

[0094] In one embodiment, a user equipment UE is enabled to measure and report a layer indicator LI / channel quality indicator CQI corresponding to one channel measurement resource CMR instance. The user equipment UE is enabled to report the layer indicator LI / channel quality indicator CQI based on the precoder of the first or last channel measurement resource CMR instance. In some embodiments, the user equipment UE is enabled to report the layer indicator LI / channel quality indicator CQI based on the channel measurement resource CMR instance closest to the channel state information CSI report or interference measurement resource IMR. In some embodiments, the user equipment UE is enabled to report the layer indicator LI / channel quality indicator CQI based on the channel measurement resource CMR instance having the best or worst energy / performance among the channel measurement resource CMR instances. In some embodiments, the channel measurement resource CMR instance may be configured by the base station gNB based on radio resource control (RRC) signaling, MAC_CE, or downlink control information (DCI). In some embodiments, the channel measurement resource CMR instance index for deriving the layer indicator LI / channel quality indicator CQI may be reported by the user equipment UE in the channel state information CSI report. The channel measurement resource CMR instance may be a real channel measurement resource CMR instance or a virtual channel measurement resource CMR instance.

[0095] In other embodiments, the user equipment UE is enabled to measure and report multiple layer indicators LI / channel quality indicators CQI corresponding to multiple channel measurement resource CMR instances. The user equipment UE is enabled to report the layer indicators LI / channel quality indicators CQI based on the precoder of each channel measurement resource CMR instance. In some embodiments, the user equipment UE can report two layer indicators LI / channel quality indicators CQI based on the channel measurement resource CMR instances, indicating the minimum and maximum channel quality indicators CQI measured between the channel measurement resource CMR instances and the layer indicator LI measured from these channel measurement resource CMR instances. In some embodiments, the user equipment UE is enabled to report two layer indicators LI / channel quality indicators CQI corresponding to the first and last channel measurement resource CMR instances, respectively. The channel measurement resource CMR instances may be actual channel measurement resource CMR instances or virtual channel measurement resource CMR instances.

[0096] In other embodiments, the user equipment UE may measure and report the layer indicator LI / channel quality indicator CQI based on an averaging precoder and channel across multiple channel measurement resource CMR instances. The channel measurement resource CMR instance for layer indicator LI / channel quality indicator CQI selection may be the same as that used for precoder calculation. In some embodiments, the channel measurement resource CMR instance for layer indicator LI / channel quality indicator CQI selection may be configured by radio resource control RRC signaling, for example, radio resource control RRC parameters of channel state information CSI-ReportConfig, or MAC_CE, or downlink control information DCI.

[0097] Figure 8 is a flow diagram illustrating a method 800 of wireless communication by a user equipment UE device (such as the user equipment UE device 102 of Figure 6) according to some embodiments. Figure 9 is a flow diagram illustrating a method 900 of wireless communication by a network entity (such as the base station gNB 104 of Figure 6) that is complementary to method 800 according to some embodiments.

[0098] As shown in FIG. 8, method 800 begins with transmitting 810 a user equipment (UE) capability indicating support for enhanced aperiodic channel state information (CSI) feedback to a network entity (similar to operation 610 in FIG. 6).

[0099] The user equipment UE device receives 820 control signaling from a network entity to configure enhanced aperiodic channel state information (CSI) feedback (similar to operation 620 in FIG. 6 ). The user equipment UE device receives 822 channel state information (CSI) report trigger signaling and a channel measurement resource (CMR) and / or an interference measurement resource (IMR) (e.g., similar to operation 622 in FIG. 6 , a plurality of channel measurement resources (CMR) and at least one interference measurement resource (IMR) as shown in FIG. 7 ).

[0100] The user equipment UE device identifies 830 a channel measurement resource CMR instance for channel state information CSI measurement and performs the channel state information CSI measurement (similar to operation 630 in FIG. 6 ). The user equipment UE device then transmits 840 a channel state information CSI report for a high or medium user equipment UE speed to the network entity (similar to operation 640 in FIG. 6 ).

[0101] As shown in FIG. 9, method 900 begins with receiving 910 user equipment UE capabilities indicating support for enhanced channel state information (CSI) feedback from a user equipment UE device (similar to operation 610 in FIG. 6).

[0102] The network entity transmits (920) control signaling configuring enhanced aperiodic channel state information (CSI) feedback to the user equipment (UE) device (similar to operation 620 of FIG. 6 ). The network entity transmits (922) channel state information (CSI) report trigger signaling (similar to operation 622 of FIG. 6 ) and a plurality of channel measurement resources (CMR) and / or one or more interference measurement resources (IMR) (similar to operations 624, 626, 628 of FIG. 6 ).

[0103] The network entity receives 940 a channel state information CSI report for channel state information CSI for a high or medium user equipment UE speed from the user equipment UE device (similar to operation 640 of FIG. 6 ). Based on the channel state information CSI report, the network entity determines 955 a channel measurement resource CMR instance for the reported channel state information CSI, identifies precoder(s) for further downlink transmissions, and transmits the downlink channel based on the identified precoder(s).

[0104] In some embodiments, the base station gNB determines whether to configure enhanced aperiodic channel state information CSI feedback for the user equipment UE based on whether it receives one or more capabilities indicating support for enhanced aperiodic channel state information CSI feedback. If the base station gNB receives one or more capabilities from the user equipment UE indicating support for enhanced aperiodic channel state information CSI feedback, the base station gNB sends control signaling (e.g., a radio resource control RRC message such as a radio resource control RRCReconfiguration message or a radio resource control RRCResume message) to the user equipment UE to configure enhanced aperiodic channel state information CSI feedback. Otherwise, if the base station gNB determines that the user equipment UE does not support enhanced aperiodic channel state information CSI feedback, the base station gNB refrains from configuring enhanced aperiodic channel state information CSI feedback for the user equipment UE. That is, the base station gNB refrains from sending control signaling to the user equipment UE to configure enhanced aperiodic channel state information CSI feedback. In this case, the base station gNB may send control signaling (e.g., a radio resource control RRC message such as a radio resource control RRCReconfiguration message or a radio resource control RRCResume message) to the user equipment UE to configure legacy aperiodic channel state information CSI feedback. After configuring legacy aperiodic channel state information CSI feedback for the user equipment UE, the base station gNB may send channel state information CSI report trigger signaling (e.g., MAC_CE or downlink control information DCI) to the user equipment UE to trigger legacy aperiodic channel state information CSI feedback.

[0105] In some further embodiments, if the base station gNB determines that the user equipment UE supports enhanced aperiodic channel state information CSI feedback based on one or more features indicating support for enhanced aperiodic channel state information CSI feedback, the base station gNB may determine whether to configure enhanced aperiodic channel state information CSI feedback for the user equipment UE based on the mobility state of the user equipment UE. The base station gNB communicates with the user equipment UE operating in a connected state (e.g., a radio resource control (RRC_CONNECTE) state). If the base station gNB determines that the user equipment UE is in a high mobility state or a medium mobility state, the base station gNB sends control signaling (e.g., a radio resource control (RRC) message such as a radio resource control (RRC) Reconfiguration message or a radio resource control (RRCResume) message) to the user equipment UE to configure enhanced aperiodic channel state information CSI feedback for the user equipment UE. Otherwise, if the base station gNB determines that the user equipment UE is in a low mobility state, the base station gNB refrains from configuring enhanced aperiodic channel state information CSI feedback for the user equipment UE. That is, the base station gNB refrains from sending control signaling to the user equipment UE to configure enhanced aperiodic channel state information CSI feedback. In some embodiments, if the base station gNB determines that the user equipment UE is in a low mobility state, the base station gNB may send control signaling to the user equipment UE to configure legacy aperiodic channel state information CSI feedback (e.g., a radio resource control RRC message such as a radio resource control RRCReconfiguration message or a radio resource control RRCResume message).

[0106] In some embodiments, the base station gNB may send control signaling (e.g., a radio resource control RRC message such as a radio resource control RRCReconfiguration message or a radio resource control RRCResume message) to configure legacy aperiodic channel state information CSI feedback regardless of the mobility state of the user equipment UE. After configuring legacy channel state information CSI feedback for the user equipment UE, the base station gNB may send a channel state information CSI report trigger signal to the user equipment UE to trigger legacy aperiodic channel state information CSI feedback.

[0107] In other embodiments, the base station gNB determines to configure enhanced aperiodic channel state information CSI feedback for the user equipment UE based on one or more features indicating support for enhanced aperiodic channel state information CSI feedback, regardless of the mobility state of the user equipment UE, as described above. The base station gNB communicates this to the user equipment UE operating in a connected state (e.g., a radio resource control RRC_CONNECTE state). If the base station gNB determines that the user equipment UE is in a high or medium mobility state, the base station gNB transmits channel state information CSI report trigger signaling and channel measurement resources CMR / interference measurement resources IMR to the user equipment UE. Otherwise, if the base station gNB determines that the user equipment UE is in a low mobility state, the base station gNB refrains from transmitting channel state information CSI report trigger signaling and channel measurement resources CMR / interference measurement resources IMR to the user equipment UE. In some embodiments, the base station gNB may configure legacy aperiodic channel state information CSI feedback for the user equipment UE, as described above. After configuring legacy channel state information CSI feedback for the user equipment UE, the base station gNB may send a channel state information CSI report trigger signal to the user equipment UE to trigger legacy aperiodic channel state information CSI feedback.

[0108] In some embodiments, the base station gNB may determine the mobility state of the user equipment UE based on a sounding reference signal received from the user equipment UE. In other embodiments, the base station gNB may determine the mobility state of the user equipment UE based on a Doppler effect (e.g., Doppler shift and / or Doppler spread) report received from the user equipment UE. In still other embodiments, the base station gNB may determine the mobility state of the user equipment UE based on a mobility state report received from the user equipment UE. For example, the base station gNB may send a message to the user equipment UE to configure the user equipment UE to report its mobility state. In one embodiment, the message may be a radio resource control (RRC) Reconfiguration message, a radio resource control (RRC) Resume message, or a MAC_CE. In response to the message, the user equipment UE sends a mobility state report to the base station gNB comprising the mobility state of the user equipment UE. In one embodiment, the mobility state report may be a radio resource control (RRC) message (e.g., a user equipment (UE) Assistance Information message) or a MAC_CE. In some embodiments, the mobility state report may include a mobility state (e.g., high, medium, or low) and / or speed. In some embodiments, the base station gNB may include one or more thresholds in the message. The user equipment UE uses the one or more thresholds to determine the mobility state (e.g., high, medium, or low).

[0109] 10 illustrates an exemplary call flow diagram (1000) for enhancing aperiodic and semi-persistent channel state information (CSI) feedback to support high / medium speed user equipment (UE) devices 102, according to some embodiments. For example, the call flow diagram illustrates a general procedure for periodic / semi-persistent channel state information (CSI-RS)-based channel state information (CSI) feedback for high / medium speed user equipment (UE) devices. As illustrated, the user equipment (UE) device 102 transmits (1010) a user equipment (UE) capability report for periodic or semi-persistent channel state information (CSI-RS)-based channel state information (CSI) feedback for high or medium speed user equipment (UE) devices to the base station gNB 104. Compared to the call flow diagram (600) of FIG. 6, the differences are as follows:

[0110] When the user equipment UE device 102 sends a user equipment UE capability report (1010), the user equipment UE device 102 may report whether to support high / medium user equipment UE speed channel state information CSI feedback based on the periodic / semi-persistent channel state information reference signal CSI-RS and the maximum number of periodic / semi-persistent channel state information reference signal CSI-RS resources, the maximum number of instances, the maximum number of channel state information CSI reporting configurations for the periodic / semi-persistent channel state information CSI, and / or the maximum number of periodic / semi-persistent channel state information CSI reports.

[0111] The base station gNB104 transmits 1020 a configuration of a channel state information CSI framework for high / medium user equipment (UE) speed channel state information CSI reporting, including information related to the number of instances. In the control signaling of the channel state information CSI framework for channel state information CSI reporting, the base station gNB104 may only need to configure the number of instances (N4) and / or the channel state information CSI reporting scheme. The interval between two consecutive instances may be derived based on the periodicity of the periodic / semi-persistent channel state information reference signal (CSI-RS).

[0112] Next, the base station gNB104 transmits 1021 a channel state information reference signal CSI-RS for the channel measurement resource CMR and the associated interference measurement resource IMR. In some cases, some or all instances of the channel state information reference signal CSI-RS configured as the channel measurement resource CMR may be transmitted before the control signaling that triggers the channel state information CSI report (if the base station gNB104 triggers 1022 an aperiodic or semi-persistent channel state information CSI report). The signaling that triggers the semi-persistent channel state information CSI report may be MAC_CE. In some embodiments, the number of instances (N4) may be indicated by MAC_CE.

[0113] The base station gNB 104 then transmits 1024 a channel state information reference signal CSI-RS for the channel measurement resource CMR and an associated interference measurement resource IMR to the user equipment UE device 102. The user equipment UE device 102 performs 1030 channel state information CSI measurements based on multiple instances of the channel measurement resource CMR and generates a channel state information CSI report. Because the channel state information CSI is measured over multiple time instances, the channel state information CSI measurements reflect the dynamics of the user equipment UE device 102 when moving at high or medium speeds (e.g., 30 km / h).

[0114] The user equipment UE device 102 transmits 1040 a channel state information CSI report comprising channel state information CSI for a high or medium user equipment UE speed. Upon receiving the channel state information CSI report, the base station gNB 104 decodes 1050 the reported channel state information CSI (e.g., to identify the precoder used for transmission, similar to operation 650 of FIG. 6).

[0115] In this disclosure, unless otherwise specified, radio resource control (RRC) signaling may refer to a radio resource control (RRC) reconfiguration message or a system information block (SIB) from a base station gNB to a user equipment (UE), where the SIB may be an existing SIB (e.g., SIB1) or a new SIB sent by the base station gNB. Furthermore, the base station gNB may obtain the user equipment (UE) capabilities via user equipment (UE) capability report signaling or from the core network (e.g., Access and Mobility Management Function (AMF)).

[0116] Further, in this disclosure, the solutions described are based on 5G_NR technology. It can be understood that the solutions may be applied to other wireless technologies such as 6G. A "base station gNB" can be generalized as a base station or a radio access network (RAN) node.

[0117] 11 is an example 1100 illustrating coherent joint transmission (CJT) according to some embodiments. As shown, the user equipment UE performs coherent transmission operations based on N TRP Up to, for example, N TRP In the case of coherent joint transmit CJT, cross transmit / receive point TRP antenna integration can be applied. In one example, the precoder of the PDSCH transmission layer is [α1P1_α2P2_α3P3_α4P4] T where α k indicates the antenna coupling coefficient of the transmitting / receiving point TRPk, and P k 1 shows the precoder.

[0118] Since Rel-15, a type-2 channel state information CSI codebook for channel state information CSI reporting for transmit / receive points TRP is introduced in user equipment UE to measure and report channel state information CSI, in which the precoder is quantized as follows: W=W1W2 In the formula, W1 is N Tx × 2L, W2 is a wideband precoder with dimension 2L × v, where L denotes the number of beams, v denotes the number of layers, and it is the rank indicator RI+1.

[0119] While W1 may be quantized based on a codebook, W2 may be quantized based on the power and angle of each element, which may lead to large overhead because W2 is subband-based and there may be multiple subbands for channel state information (CSI) reporting. In one example, the codebook for W1 selection may be defined as follows:

[0120]

number

[0121] During the ceremony,

[0122]

number

[0123] where m represents the Kronecker product, L indicates the number of beams configured by radio resource control (RRC) signaling, N1, N2, O1, and O2 are related to the number of ports in the horizontal and vertical domains configured by radio resource control (RRC) signaling and oversampling factors, and the candidate values may be determined based on the number of channel state information reference signal (CSI-RS) ports. The codebook includes 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.

[0124] In Rel-16, an extended type-2 codebook for channel state information CSI reporting at the transmitting / receiving point TRP is introduced, and the precoder may be quantized as follows:

[0125]

number

[0126] During the ceremony,

[0127]

number

[0128] denotes the broadband beam coupling weight with dimensions 2L × M, and W f denotes a frequency domain basis of dimension N3 × M, where N3 is the number of subbands and may be derived by the radio resource control RRC parameter numberOfPMI-SubbandsPer channel quality indicator CQI-Subband, and M may be derived by the radio resource control RRC signaling of numberOfPMI-SubbandsPer channel quality indicator CQI-Subband and paramCombination. Details may be found in section 5.2.2.2.5 of 3GPP_TS_38.214.

[0129] One possible way to implement the channel state information (CSI) feedback for coherent joint transmission (CJT) is to calculate the quantized channel state information (CSI) as follows:

[0130]

number

[0131] W kdenotes the quantized precoder of the transmit / receive point TRPk. In some embodiments, another possible approach is to extend the current codebook for multi-transmit / receive point TRP operation by considering beams from multiple transmit / receive points TRP. Thus, the dimension of each weight may be defined as W1, and N TRP *N Tx ×N TRP *It is a wideband precoder having a dimension of 2L,

[0132]

number

[0133] is N TRP * Denotes broadband beam weight combination with dimensions of 2L × M 。 Regardless of which quantization scheme is used, one issue may be how to configure the channel state information CSI framework to support channel state information CSI feedback for coherent joint transmission CJT (e.g., associated with the configuration of channel measurement resource CMR / interference measurement resource IMR and channel state information reference signal CSI-RS configuration), as well as the user equipment UE behavior for channel measurement resource CMR / interference measurement resource IMR measurement and channel state information reference signal CSI-RS reception. The channel state information CSI framework may also support the selection of transmission / reception points TRP. A second issue may be how to define the user equipment UE behavior for coherent joint transmission CJT_CSI measurement (e.g., CPU occupancy rules and minimum processing delay for coherent joint transmission CJT_CSI measurement and reporting).

[0134] FIG. 12 is a flow diagram illustrating a method 1200 of coherent joint transmit CJT_CSI reporting by a user equipment (UE) device according to some embodiments. Method 1200 is performed by processing logic comprising hardware (e.g., circuitry, dedicated logic, programmable logic, processor, processing device, central processing unit, system-on-chip (SoC), etc.), software (e.g., instructions and / or applications implementing / running on a processing device), firmware (e.g., microcode), or a combination thereof. Method 1200 is performed by a user equipment UE device. The user equipment UE device may include one or more radio frequency (RF) modems, a processor coupled to the one or more radio frequency RF modems, and at least one non-transitory memory storing executable instructions that operate at least one of the processor or the radio frequency RF modem to perform method 1200. A network entity may perform a complementary method to interact with a user equipment UE device that performs method 1200 (see the call flow diagram (1300) of FIG. 13).

[0135] Referring to Figure 12, method 1200 illustrates exemplary functions employed by various embodiments. Although specific functional blocks ("blocks") are disclosed in the method, such blocks are examples; that is, the embodiments are well suited to performing various other blocks or variations of the blocks described in the method. It is understood that the blocks of the method may be performed in a different order than presented, and that not all of the blocks of the method may be performed.

[0136] 12, the method 1200 comprises block 1210 of decoding a configuration of a user equipment (UE) device based on a configuration message from a network entity, the configuration being used to include coherent joint transmission-based channel state information (coherent joint transmission CJT-channel state information CSI) in a channel state information (CSI) report. The coherent joint transmission CJT-CSI comprises channel state information (CSI) measurements of signals from multiple transmit / receive points (TRPs) coherently combined at the user equipment (UE) device through joint antenna precoding at the multiple transmit / receive points (TRPs).

[0137] The method 1200 includes a block 1220 of receiving a plurality of channel measurement resources CMR and at least one interference measurement resource IMR associated with one of the plurality of channel measurement resources CMR from a plurality of transmission / reception points TRP.

[0138] The method 1200 includes a block 1230 for measuring a coherent joint transmit CJT-CSI based on a plurality of channel measurement resources CMR and at least one interference measurement resource IMR.

[0139] The method 1200 comprises a block 1240 of transmitting a channel state information CSI report to a plurality of transmission / reception points TRP, the CSI report comprising one or more indices corresponding to a plurality of channel measurement resources CMR.

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

[0141] In some embodiments, the indication of the capability to report channel state information CSI reporting comprises, for each user equipment UE device of a group of user equipment UE devices comprising each component carrier (CC), each bandwidth portion (BWP), each band, each band configuration, or each user equipment UE device, any of the maximum number of transmit / receive points TRP supported by the user equipment UE device for channel state information CSI reporting of coherent joint transmission CJT-CSI, the maximum number of channel measurement resources CMR per configuration message for coherent joint transmission CJT-CSI, the maximum number of antenna ports for each of a plurality of channel measurement resources CMR, the maximum number of total number of antenna ports across a plurality of channel measurement resources CMR for channel state information CSI reporting, the maximum number of channel measurement resources CMR across a plurality of configuration messages (CSI-reportConfig's), and the maximum number of a plurality of configuration messages.

[0142] In some embodiments, the plurality of channel measurement resources CMR comprises one or more groups of channel measurement resources CMR across a plurality of transmission / reception points TRP, the one or more groups of channel measurement resources CMR being configured by a configuration message, and the channel state information CSI report comprises an index identifying one of the one or more groups of channel measurement resources CMR.

[0143] In some embodiments, the channel state information CSI report further comprises at least one of a rank indicator (RI), a precoder matrix indicator (PMI), a channel quality indicator (CQI), a tier indicator (LI), or one or more channel state information reference signals CSI-RS resource indicators (CRI).

[0144] In some embodiments, the user equipment UE device may perform simultaneous measurements by measuring the coherent joint transmission CJT-CSI when a channel state information CSI processing unit (CPU) of the user equipment UE device is made available to process multiple channel measurement resources CMRs, and the CPU of the user equipment UE device is configured based on the total number of one or more groups of channel measurement resources CMRs. For example, the user equipment UE device is enabled to determine that a trigger for including the coherent joint transmission CJT-CSI in the channel state information CSI report requires a number of CPUs that exceeds a maximum number of CPUs included in an indication of capability to report the channel state information CSI report, and to discard the trigger, i.e., determine that the trigger corresponds to an erroneous request from the network entity.

[0145] In some embodiments, the user equipment UE device may operate multiple CPUs to perform multiple coherent joint transmit CJT-CST measurements in parallel for inclusion in the channel state information CSI report, the number of multiple CPUs imposing a maximum number of coherent joint transmit CJT-CSI measurements that the user equipment UE device may perform in parallel.

[0146] In some embodiments, the at least one interference measurement resource IMR comprises one or more of a zero-power interference measurement resource IMR (ZP-IMR) and a non-zero-power interference measurement resource IMR (NZP-IMR), and the at least one interference measurement resource IMR is associated with one of one or more groups of channel measurement resources CMR.

[0147] The method 1200 may further include measuring at least one interference measurement resource IMR using multiple receive beams at the user equipment UE device, or measuring at least one interference measurement resource IMR across two or more channel measurement resources CMR in one of the one or more channel measurement resource CMR groups.

[0148] 13 illustrates an example call flow diagram (1300) for coherent joint transmission CJT_CSI reporting in accordance with some embodiments. As illustrated, the call flow diagram (1300) illustrates a general procedure for coherent joint transmission CJT-based channel state information (CSI) reporting by a user equipment UE device 102 to a base station gNB 104. As illustrated, the user equipment UE 102 reports (1302) the user equipment UE capabilities for coherent joint transmission CJT-channel state information (CSI) measurement and reporting to the base station gNB 104. In response to the indicated user equipment UE capabilities, the base station gNB 104 transmits (1310) a configuration to configure the user equipment UE device 102 for a channel state information (CSI) framework for coherent joint transmission CJT-CSI reporting.

[0149] The user equipment UE device 102 receives 1312 a trigger for coherent joint transmission CJT-CSI reporting from the base station gNB 104. The user equipment UE device 102 receives 1320 a channel measurement resource CMR and an associated interference measurement resource IMR for coherent joint transmission CJT-CSI measurement, and performs 1330 coherent joint transmission CJT-CSI measurement based on the received channel measurement resource CMR and interference measurement resource IMR, a CPU occupancy rule, and a minimum processing delay. The user equipment UE device 102 then transmits 1340 a coherent joint transmission CJT-CSI report to the base station gNB 104.

[0150] The user equipment UE device 102 may perform coherent joint transmit CJT-CSI measurement and reporting based on one, some, or all of the following functions for coherent joint transmit CJT-CSI measurement and / or reporting:

[0151] · The maximum number of transmit / receive points TRP that the user equipment UE can support for coherent joint transmit CJT-CSI report(s); This feature is provided for the maximum number of CJI - Channel State Information (CSI) report(s) that the user equipment (UE) is allowed to simultaneously measure and process reference signals; · Minimal processing delay for coherent joint transmit CJT-CSI measurements and reporting.

[0152] In some embodiments, each, some, or all of the capabilities may be defined or specified for each component carrier CC for each band combination supported by the user equipment UE. Each, some, or all of the capabilities for one or more component carrier CCs within a band combination supported by the user equipment UE may be the same or different. Each, some, or all of the capabilities of component carrier CCs in different band combinations supported by the user equipment UE may be the same or different.

[0153] In other embodiments, each, some, or all of the capabilities may be defined or specified for each band combination supported by the user equipment UE. Each, some, or all of the capabilities for different band combinations supported by the user equipment UE may be the same or different. In some embodiments, the band combinations may be contiguous band combinations within a band, non-contiguous band combinations within a band, or band combinations between bands.

[0154] In other embodiments, each, some, or all of the capabilities may be defined or specified for each band supported by the user equipment UE, and the capabilities of the bands supported by the user equipment UE may be the same or different.

[0155] In yet another embodiment, each, some, or all of the capabilities may be defined or specified for each frequency range (FR) supported by the user equipment UE, and each, some, or all of the capabilities of one or more frequency ranges FR (e.g., frequency range FR1 and frequency range FR2) supported by the user equipment UE may be the same or different.

[0156] In yet other embodiments, each, some, or all of the capabilities may be defined or specified for each user equipment UE, for example, regardless of constituent carrier CC, band combination, band, and frequency range FR.

[0157] In some embodiments, the user equipment UE is enabled to transmit one, some, or all of its capabilities to the base station gNB (1302). In one embodiment, the user equipment UE transmits a user equipment UE capability information message (e.g., a User Equipment UE Capability Information message) comprising multiple user equipment UE capabilities (e.g., a User Equipment UE-NR-Capability_IE) for the user equipment UE, which comprises one, some, or all of the capabilities to the base station gNB. The base station gNB may transmit the multiple user equipment UE capabilities to a core network (CN) (e.g., an Access and Mobility Function (AMF)), which stores the multiple user equipment UE capabilities for the user equipment UE. In other embodiments, the user equipment UE uses a capability ID to identify multiple user equipment UE capabilities pre-stored in the CN. The user equipment UE transmits a Non-Access Stratum (NAS) message comprising the capability ID to the CN via the base station gNB. According to any one of the above embodiments, the next time the user equipment UE connects to the base station gNB, the base station gNB may receive the multiple user equipment UE capabilities from the CN without requiring the user equipment UE to transmit the multiple user equipment UE capabilities. In other embodiments, one, some, or all of the capabilities for coherent joint transmission CJT-CSI measurement and / or reporting may be predefined in 3GPP specifications without the user equipment UE transmitting the capability(s) to the base station gNB or CN.

[0158] Based on the capability(s) of the coherent joint transmission CJT-CSI measurement and / or reporting, the base station gNB may configure the user equipment UE to perform coherent joint transmission CJT-CSI measurement and reporting. In some embodiments, the base station gNB sends 1310 to the user equipment UE a radio resource control RRC message (e.g., a radio resource control RRCReconfiguration message or a radio resource control RRCResume message), the message comprising channel state information CSI-reportConfig_IE(s), each of which may configure a channel measurement resource CMR, at least one interference measurement resource IMR associated with each channel measurement resource CMR for the coherent joint transmission CJT-CSI measurement, and configuration of an uplink resource, e.g., a physical uplink control channel PUCCH or a physical uplink shared channel PUSCH, for the coherent joint transmission CJT-CSI reporting. In some embodiments, the base station gNB may configure multiple channel measurement resource CMR groups and interference measurement resource IMR(s) associated with each channel measurement resource CMR group for coherent joint transmission CJT-CSI measurement in a radio resource control (RRC) message. In one embodiment, each of the channel measurement resource CMR groups comprises or configures multiple channel measurement resource CMRs, each of which may be associated with one or more interference measurement resource IMRs. Based on the channel measurement resource CMR group(s), the user equipment UE determines the channel measurement resource CMR in (each of) the channel measurement resource CMR group(s) for coherent joint transmission CJT-CSI measurement. Thus, the user equipment UE performs coherent joint transmission CJT-CSI measurement based on the channel measurement resource CMR or the channel measurement resource CMR group(s) and the associated interference measurement resource IMR(s) (if configured) (1330).In some embodiments, the base station gNB may include a channel measurement resource CMR group index for each of the channel measurement resource CMR group(s) in the radio resource control RRC message. In other embodiments, the base station gNB does not include a channel measurement resource CMR group index in the radio resource control RRC message. In such a case, the user equipment UE may determine the channel measurement resource CMR group index for each of the channel measurement resource CMR group(s) based on the order of each channel measurement resource CMR group in the container comprising the channel measurement resource CMR group(s) (e.g., a list IE such as an Add and / or Modify List IE).

[0159] In some embodiments, the base station gNB may trigger coherent joint transmission CJT-CSI reporting by transmitting a trigger message (e.g., MAC-CE or downlink control information DCI) to the user equipment UE (1312). In response to the trigger message, the user equipment UE transmits one or more coherent joint transmission CJT-CSI reports regarding uplink resources to the base station gNB (1340). In one example, the base station gNB may trigger semi-persistent coherent joint transmission CJT-CSI reporting by transmitting a MAC_CE to the user equipment UE. The base station gNB is enabled to stop or deactivate semi-persistent coherent joint transmission CJT-CSI reporting by transmitting a deactivation command (e.g., MAC_CE) to the user equipment UE. In another example, the base station gNB may trigger aperiodic coherent joint transmission CJT-CSI reporting by transmitting downlink control information DCI to the user equipment UE. In some embodiments, the user equipment UE is enabled to perform coherent joint transmission CJT-CSI measurements based on the channel measurement resources CMR / interference measurement resources IMR configured in the channel state information CSI-ReportConfig_IE(s) for periodic coherent joint transmission CJT-CSI reporting. In some embodiments, upon receiving the trigger message, the user equipment UE is enabled to perform coherent joint transmission CJT-CSI measurements based on the channel measurement resources CMR / interference measurement resources IMR configured in the channel state information CSI-ReportConfig_IE(s) for semi-persistent or aperiodic coherent joint transmission CJT-CSI reporting. Upon receiving the deactivation command, the user equipment UE is enabled to stop performing coherent joint transmission CJT-CSI measurements based on the channel measurement resources CMR / interference measurement resources IMR configured in the channel state information CSI-ReportConfig_IE(s) for semi-persistent coherent joint transmission CJT-CSI reporting.

[0160] In some embodiments, the user equipment UE has multiple channel state information CSI processing units (CPUs) dedicated to coherent joint transmission CJT-CSI measurement and / or reporting. In one embodiment, the number of CPUs determines the maximum number of coherent joint transmission CJT-CSI report(s) that the user equipment UE is allowed to simultaneously measure and process reference signals, for which this functionality is provided. While performing coherent joint transmission CJT-CSI measurement and / or reporting, the user equipment UE determines the channel state information CSI processing unit (CPU) occupancy rate for each CPU.

[0161] In another embodiment, the user equipment UE has multiple channel state information CSI processing units (CPUs), and the user equipment UE may use these CPUs to perform coherent joint transmission CJT-CSI measurements and / or reports and other type(s) of channel state information CSI measurements and / or reports (e.g., non-coherent joint transmission CJT-CSI measurements and / or reports). While performing coherent joint transmission CJT-CSI measurements and / or reports and other type(s) of channel state information CSI measurements and / or reports, the user equipment UE determines the channel state information CSI processing unit (CPU) occupancy rate for each CPU. In one embodiment, if the user equipment UE is using a CPU for non-coherent joint transmission CJT-CSI measurements and / or reports, the user equipment UE cannot use the CPU to perform coherent joint transmission CJT-CSI measurements and / or reports. Similarly, if the user equipment UE is using the CPU for coherent joint transmission CJT-CSI measurement and / or reporting, the user equipment UE cannot use the CPU to perform non-coherent joint transmission CJT-CSI measurement and / or reporting.

[0162] In some embodiments, the user equipment UE may measure (1330) and report (1340) coherent joint transmission CJT-CSI report(s) based on the channel measurement resource CMR and associated interference measurement resource(s) IMR, the CPU occupancy rule, and a minimum processing delay of the channel state information CSI triggered by other channel state information CSI-ReportConfig and the coherent joint transmission CJT-CSI. In some embodiments, in the coherent joint transmission CJT-CSI report, the user equipment UE is enabled to report a channel measurement resource CMR group index or multiple channel state information reference signal CSI-RS resource index(es) (CRI), and corresponding channel state information CSI, e.g., rank indicator RI / PMI / channel quality indicator CQI / layer indicator LI. The channel measurement resource CMR group index identifies or indicates a particular channel measurement resource CMR group from the configured channel measurement resource CMR group(s), and the user equipment UE obtains channel state information CSI from the channel measurement resources CMR and associated interference measurement resource IMR(s) (if configured) of the particular channel measurement resource CMR group. The channel resource indicator CRI identifies or indicates a particular channel measurement resource CMR and associated interference measurement resource IMR(s) (if configured) from which the user equipment UE obtains channel state information CSI.

[0163] FIG. 14 is a flow diagram illustrating a method 1400 of coherent joint transmission CJT-CSI reporting by a user equipment (UE) device (such as the user equipment UE device 102 of FIG. 13) according to some embodiments. FIG. 15 is a flow diagram illustrating a method 1500 of coherent joint transmission CJT-CSI reporting by a network entity (such as the base station gNB 104 of FIG. 13) according to some embodiments. The method 1500 performed by the network entity is complementary to the method 1400 performed by the user equipment UE device. According to aspects of the present disclosure, unless specified, the radio resource control RRC signaling may include a radio resource control RRC reconfiguration message or a system information block (SIB) from the base station gNB to the user equipment UE, and the SIB may be an existing SIB (e.g., SIB 1) or a new SIB 1 (e.g., SIB J, J>21) transmitted by the base station gNB. Furthermore, the base station gNB may obtain the user equipment UE capabilities via user equipment UE capability report signaling or from the core network (e.g., Access and Mobility Management Function (AMF)).

[0164] Further, in this disclosure, the solutions described are based on 5G_NR technology. It can be understood that the solutions can be applied to other wireless technologies such as 6G. A "base station gNB" can be generalized as a base station or a radio access network (RAN) node.

[0165] In FIG. 14, method 1400 begins with transmitting 1402 user equipment UE capabilities for coherent joint transmission CJT-CSI measurement and reporting to a network entity (similar to operation 1302 in FIG. 13). The user equipment UE receives 1410 control signaling from a network entity of a channel state information CSI framework for coherent joint transmission CJT-CSI measurement and reporting (similar to operation 1310 in FIG. 13).

[0166] The user equipment UE receives 1412 a plurality of channel measurement resources CMR and / or interference measurement resources IMR and coherent joint transmission CJT-CSI trigger signaling (similar to operations 1312 and 1320 in FIG. 13 ). The user equipment UE determines 1428 a CPU occupancy status and processing delay (to compare the processing delay with a scheduling offset, as discussed further below with respect to minimum processing delay).

[0167] The user equipment UE performs coherent joint transmit CJT-CSI measurements (1430) when a CPU is available (similar to operation 1330 in FIG. 13). Based on the coherent joint transmit CJT-CSI measurements, the user equipment UE transmits a coherent joint transmit CJT-CSI report to a network entity (1440) (similar to operation 1340 in FIG. 13).

[0168] 15, method 1500 begins with decoding 1504 user equipment UE capabilities related to coherent joint transmit CJT-CSI measurement and reporting after receiving the user equipment UE capabilities. The network entity transmits 1510 control signaling of the channel state information CSI framework to the user equipment UE device for coherent joint transmit CJT-CSI measurement and reporting (similar to operation 1310 of FIG. 13).

[0169] The network entity further transmits 1512 the plurality of channel measurement resources CMR and one or more interference measurement resources IMR to the user equipment UE device (similar to operation 1312 in FIG. 13 ). The network entity then receives and decodes 1550 the coherent joint transmit CJT-CSI report from the user equipment UE device.

[0170] In an embodiment, a user equipment (UE) is enabled to report its capabilities with respect to the maximum number of transmit / receive points (TRP) that it can support for coherent joint transmission CJT-CSI reporting, the maximum number of channel measurement resources (CMR) per channel state information (CSI-reportConfig) for coherent joint transmission CJT-CSI reporting, the maximum number of antenna ports per channel measurement resource (CMR) for coherent joint transmission CJT-CSI reporting, the maximum number of total antenna ports across channel measurement resources (CMR) for coherent joint transmission CJT-CSI reporting, the maximum number of channel measurement resources (CMR) across channel state information (CSI-reportConfig) for coherent joint transmission CJT-CSI reporting, and / or the maximum number of channel state information (CSI-reportConfig) for coherent joint transmission CJT-CSI reporting. These numbers may be counted per component carrier (CC), per bandwidth portion (BWP), per band, per band combination, and / or per user equipment (UE).

[0171] In an embodiment, in the case of a channel measurement resource CMR configuration for coherent joint transmission CJT-CSI measurement, the base station gNB may configure N channel measurement resource CMR groups for channel state information CSI reporting by radio resource control (RRC) signaling, for example in the channel state information CSI-ReportConfig that the base station gNB transmits to the user equipment (UE), where N may be an integer greater than 0. Within the channel measurement resource CMR group k, the base station gNB may configure N TRP,k A channel measurement resource CMR may be configured, in which N TRP,kmay be an integer greater than 1. Each channel measurement resource CMR in a channel measurement resource CMR group corresponds to one transmission / reception point TRP. In the channel state information CSI reporting, the user equipment UE is enabled to report a channel measurement resource CMR group index and the corresponding rank indicator RI / PMI / channel quality indicator CQI / layer indicator LI measured from the channel measurement resource CMR. In one embodiment, for a user equipment UE reporting a channel measurement resource CMR group index k, the channel state information CSI may be measured from all channel measurement resources CMR in the channel measurement resource CMR group. In another embodiment, for a user equipment UE reporting a channel measurement resource CMR group index k, the user equipment UE is enabled to report an indicator reporting an index(ies) of the measured channel measurement resource CMR in the channel measurement resource CMR group, in order to report from which channel measurement resource CMR(s) the channel measurement resource CMR is measured. In one embodiment, if the base station gNB activates or configures only one channel measurement resource CMR group for channel state information CSI reporting, the user equipment UE does not report a channel measurement resource CMR group index.

[0172] In one embodiment, for interference measurement resource IMR configuration, the base station gNB may configure one zero-power ZP_interference measurement resource IMR and / or one non-zero-power NZP_interference measurement resource IMR associated with each channel measurement resource CMR group by radio resource control RRC signaling, for example by radio resource control RRC parameters of channel state information CSI-reportConfig, in which the channel measurement resource CMR / interference measurement resource IMR(s) are associated in an N-to-1 manner. The user equipment UE measures interference based on the configured interference measurement resource IMR(s) and measures channels based on the configured channel measurement resource CMR in the channel measurement resource CMR group. In such an N-to-1 channel measurement resource CMR / interference measurement resource IMR association operation, for a user equipment UE having multiple beams, for example, a user equipment UE supporting type quasi-co-location (QCL) (spatial Rx parameter QCL) or frequency range 2, the user equipment UE is enabled to receive interference measurement resource IMR based on multiple QCL-type D assumptions based on all channel measurement resource CMRs of a channel measurement resource CMR group. In one example, if the user equipment UE receives channel measurement resource CMRs of a channel measurement resource CMR group based on user equipment UE beams #1, #2, and #3, the user equipment UE receives interference measurement resource IMRs based on beams #1, #2, and #3. Interference can be measured based on the average interference / maximum interference / minimum interference / total interference measured from the user equipment UE beams (or user equipment UE antenna ports).

[0173] 16 illustrates an example of a channel state information CSI framework 1600 for channel measurement resource CMR / interference measurement resource IMR configuration 1601 and association for coherent joint transmission CJT-CSI reporting according to some embodiments. The example illustrates an example of the channel state information CSI framework 1600 of this embodiment. In one example, in the channel state information CSI-ResourceConfig configured as channel measurement resource CMR for semi-persistent / periodic coherent joint transmission CJT-CSI reporting, the base station gNB configures N TRP,k Up to N resource sets can be configured in the nzp-CSI-RS-ResourceSetList having resource(s) and in the channel state information CSI-ResourceConfig that is configured as interference measurement resource IMR for semi-persistent / periodic coherent joint transmission CJT-CSI reporting, and the base station gNB may configure one resource set in the nzp-CSI-RS-ResourceSetList or csi-IM-ResourceSetList for the N resources. In another example, for aperiodic coherent joint transmission CJT-CSI reporting, the base station gNB may configure up to N reportsets in the channel state information CSI-AssociatedReportConfigInfo for the base station gNB to select N channel measurement resource CMR groups 1603.

[0174] The base station gNB may indicate the associated interference measurement resources IMR by indicating N csi-IM-ResourcesForInterference and nzp-CSI-RS-ResourcesForInterference in the channel state information CSI-AssociatedReportConfigInfo, where each resource set of the interference measurement resources IMR comprises one interference measurement resource IMR. In some embodiments, the base station gNB may indicate the associated interference measurement resources IMR by indicating one csi-IM-ResourcesForInterference and one nzp-CSI-RS-ResourcesForInterference in the AssociatedReportConfigInfo, where each resource set of the interference measurement resources IMR comprises N interference measurement resources IMR. In some embodiments, for aperiodic coherent joint transmission CJT-CSI reporting, the base station gNB triggers all configured channel measurement resource CMR set(s) and / or all configured interference measurement resource IMR set(s) for the triggered channel state information CSI-ReportConfig, etc. The user equipment UE ignores the radio resource control RRC parameters resourceSet, nzp-CSI-RS-ResourceSetList, or csi-IM-ResourceSetList, or the base station gNB refrains from configuring reportsSet, nzp-CSI-RS-ResourceSetList, or csi-IM-ResourceSetList. The base station gNB transmits one or more radio resource control RRC messages (e.g., radio resource control RRCReconfiguration message or radio resource control RRCResume message) comprising these configurations to the user equipment UE.

[0175] In another embodiment, for the interference measurement resource IMR configuration, the base station gNB may configure the N associated channel measurement resources CMR of the channel measurement resource CMR group 1603 by radio resource control RRC signaling, for example by radio resource control RRC parameters of the channel state information CSI-reportConfig, in which the channel measurement resource CMR / interference measurement resource IMR(s) are associated in a one-to-one manner. TRP,k Zero Power ZP_ Interference Measurement Resources IMR1607 and / or N TRP,k For such one-to-one channel measurement resource CMR / interference measurement resource IMR association operation, the user equipment UE may measure interference based on the measured minimum / average / maximum / total interference from the configured interference measurement resource IMR(s) for the channel measurement resource CMR group. In the case of interference measurement from non-zero power NZP-interference measurement resources IMR, the base station gNB may configure an antenna coupling coefficient for each non-zero power NZP-interference measurement resource IMR resource associated with the channel measurement resource CMR of the channel measurement resource CMR group. In one embodiment, the measured interference from subcarrier u for a non-zero power NZP-interference measurement resource IMR of channel measurement resource CMR group k is

[0176]

number

[0177] where p j denotes the antenna coupling coefficient configured by the base station gNB for the non-zero power NZP_interference measurement resource IMR resource j,

[0178]

number

[0179] denotes the estimated effective channel for subcarrier u from non-zero power NZP-interference measurement resource IMRj. In some embodiments, antenna coupling coefficients for non-zero power NZP-interference measurement resource IMR may be pre-defined.

[0180] 17 illustrates an example of a channel state information CSI framework 1700 for channel measurement resource CMR / interference measurement resource IMR configuration 1701 and association for coherent joint transmission CJT-CSI reporting according to some embodiments. The example illustrates an example of the channel state information CSI framework 1700 of this embodiment. In one example, in the channel state information CSI-ResourceConfig configured as the channel measurement resource CMR / interference measurement resource IMR for semi-persistent / periodic coherent joint transmission CJT-CSI reporting, the base station gNB configures N resource sets of nzp-CSI-RS-ResourceSetList or csi-IM-ResourceSetList for resource set k as N resource sets. TRP,kIn another example, for aperiodic coherent joint transmission CJT-CSI reporting, the base station gNB may configure up to N resourceSets, csi-IM-ResourcesForInterference, nzp-CSI-RS-ResourcesForInterference, in the channel state information CSI-AssociatedReportConfigInfo for the base station gNB to select zero-power ZP-interference measurement resources IMR 1707 and non-zero-power NZP-interference measurement resources IMR 1709 corresponding to the N channel measurement resource CMR groups 1713. In another example, for aperiodic coherent joint transmission CJT-CSI reporting, the base station gNB may configure up to N resourceSets in the channel state information CSI-AssociatedReportConfigInfo for the base station gNB to select N channel measurement resource CMR groups and associated zero-power ZP-interference measurement resources IMR / non-zero-power NZP-interference measurement resources IMR. In some embodiments, for aperiodic coherent joint transmission CJT-CSI reporting, the base station gNB has triggered all configured channel measurement resource CMR set(s) 1703 such as triggered channel state information CSI-ReportConfig and / or all configured interference measurement resource IMR set(s) 1707 and 1709, and the user equipment UE has ignored the radio resource control RRC parameters resourceSet, nzp-CSI-RS-ResourceSetList, or csi-IM-ResourceSetList, or the base station gNB refrains from configuring resourceSet, nzp-CSI-RS-ResourceSetList, or csi-IM-ResourceSetList. The base station gNB transmits one or more radio resource control RRC messages (e.g., a radio resource control RRCReconfiguration message or a radio resource control RRCResume message) comprising these configurations to the user equipment UE.

[0181] In another embodiment, for the interference measurement resource IMR configuration, the base station gNB may configure one zero power ZP_interference measurement resource IMR 1707 and / or N associated with the channel measurement resource CMR 1703 of the channel measurement resource CMR group 1713. TRP,k The non-zero power NZP_interference measurement resource IMR 1709 can be configured by radio resource control RRC signaling, for example, radio resource control RRC parameters in the channel state information CSI-reportConfig 1701, and the channel measurement resource CMR and the non-zero power NZP-interference measurement resource IMR are associated one-to-one. The behavior of the user equipment UE for interference measurement across zero power ZP / non-zero power NZP_interference measurement resource IMR is based on the above implementation of each of the N-to-1 channel measurement resource CMR / interference measurement resource IMR association and the one-to-one interference measurement resource IMR / channel measurement resource CMR association.

[0182] In another embodiment, for the interference measurement resource IMR configuration, the base station gNB may select one non-zero power NZP_interference measurement resource IMR 1707 and / or N associated with the channel measurement resource CMR 1703 of the channel measurement resource CMR group 1713. TRP,k The zero-power ZP_interference measurement resource IMR 1709 can be configured by radio resource control RRC signaling, for example, radio resource control RRC parameters in the channel state information CSI-reportConfig 1701, and the channel measurement resource CMR and the zero-power ZP-interference measurement resource IMR are one-to-one associated. The behavior of the user equipment UE for interference measurement via the non-zero-power NZP / zero-power ZP_interference measurement resource IMR is based on the above-mentioned implementations of the N-to-1 channel measurement resource CMR / interference measurement resource IMR association and the one-to-one interference measurement resource IMR / channel measurement resource CMR association, respectively.

[0183] In another embodiment, in the case of a channel measurement resource CMR configuration for coherent joint transmission CJT-CSI measurement, the base station gNB may configure N for channel state information CSI reporting by radio resource control (RRC) signaling, e.g., in the channel state information CSI-ReportConfig. TRP _ A channel measurement resource CMR group 1713 may be configured, in which N trp may be an integer greater than 1. Within the channel measurement resource CMR group k, the base station gNB k The channel measurement resource CMR can be set, and kmay be an integer greater than 0. Each channel measurement resource CMR group corresponds to one transmission / reception point TRP. In the channel state information CSI reporting, the user equipment UE may report not only one or more channel resource indicators CRI but also the corresponding rank indicator RI / PMI / channel quality indicator CQI / layer indicator LI measured from the channel measurement resources CMR, where reporting one channel resource indicator CRI indicates that the channel state information CSI is measured from a single transmission / reception point TRP, and reporting more than one channel resource indicator CRI indicates that the channel state information CSI is measured from multiple transmission / reception points TRP. In one embodiment, the channel resource indicator CRI may be counted across the channel measurement resource CMR groups 1713. In another embodiment, the channel resource indicator CRI may be counted within a channel measurement resource CMR group, and then the user equipment UE may report the channel measurement resource CMR group index in addition to each reported channel resource indicator CRI. The number of reported channel resource indicators CRI associated with a rank indicator RI / PMI / channel quality indicator CQI / layer indicator LI may be predefined, for example based on the number of channel measurement resource CMR groups 1713, or may be configured by the base station gNB through channel state information CSI-ReportConfig or radio resource control RRC signaling of MAC_CE, or may be reported by the user equipment UE in a channel state information CSI report. In one example, the user equipment UE is enabled to report selected channel measurement resource CMR group index(es) in the channel state information CSI report. In this case, the number of reported channel resource indicators CRI may be the same as the number of selected channel measurement resource CMR group index(es).For channel state information CSI reported on the long physical uplink control channel PUCCH or the physical uplink shared channel PUSCH, selected channel measurement resource CMR group index(es) may be reported in channel state information CSI Part 1. Then, channel state information CSI reported in channel state information CSI Part 2 may be reported based on the channel measurement resource CMR group index(es) reported in channel state information CSI Part 1.

[0184] In an embodiment, for the interference measurement resource IMR configuration, the base station gNB selects the M associated with the channel measurement resource CMR 1703 of the channel measurement resource CMR group 1713. k Non-zero power NZP interference measurement resource IMR1707 and / or M k The non-zero power NZP-interference measurement resource IMR 1709 of the channel measurement resource CMR group may be configured by radio resource control RRC signaling, e.g., radio resource control RRC parameters in the channel state information CSI-reportConfig 1701, and the channel measurement resource CMR and the zero power ZP-interference measurement resource IMR(s) are associated in a one-to-one manner. In such a one-to-one channel measurement resource CMR / interference measurement resource IMR association operation, the user equipment UE may measure interference based on the measured minimum / average / maximum / total interference from the configured interference measurement resource IMR(s) associated with the channel measurement resource CMR(s) indicated by the reported channel resource indicator(s). In the case of interference measurement from the non-zero power NZP-interference measurement resource IMR 1709, the base station gNB may configure an antenna coupling coefficient for each non-zero power NZP-interference measurement resource IMR resource associated with the channel measurement resource CMR of the channel measurement resource CMR group. In one embodiment, the measured interference from subcarrier u for a non-zero power NZP-interference measurement resource IMR of channel measurement resource CMR group k is given by:

[0185]

number

[0186] where p j denotes the antenna coupling coefficient configured by the base station gNB for the non-zero power NZP_interference measurement resource IMR resource j,

[0187]

number

[0188] denotes the estimated effective channel for subcarrier u from non-zero power NZP-interference measurement resource IMRj. In some embodiments, antenna coupling coefficients for non-zero power NZP-interference measurement resource IMR may be pre-defined.

[0189] 18 illustrates an example of a channel state information CSI framework 1800 for channel measurement resource CMR / interference measurement resource IMR configuration 1801 and association for coherent joint transmission CJT-CSI reporting according to some embodiments. The example illustrates an example of the channel state information CSI framework 1800 of this embodiment. In one example, in the channel state information CSI-ResourceConfig configured as the channel measurement resource CMR / interference measurement resource IMR for semi-persistent / periodic coherent joint transmission CJT-CSI reporting, the base station gNB may set N of nzp-CSI-RS-ResourceSetList or csi-IM-ResourceSetList. TRP resource set k, M k In another example, for aperiodic coherent joint transmission CJT-CSI reporting, the base station gNB may configure a maximum of N TRP The base station gNB uses the resourceSet, csi-IM-ResourcesForInterference, and nzp-CSI-RS-ResourcesForInterference of TRP1803. In some embodiments, for aperiodic coherent joint transmission CJT-CSI reporting, the base station gNB may set in the channel state information CSI-AssociatedReportConfigInfo to select the zero-power ZP-interference measurement resources IMR 1807 and the non-zero-power NZP-interference measurement resources IMR 1809 corresponding to the channel measurement resource CMR group 1813 of the CSI-ReportConfigInfo. In some embodiments, for aperiodic coherent joint transmission CJT-CSI reporting, the base station gNB has triggered all configured channel measurement resource CMR set(s) and / or all configured interference measurement resource IMR set(s), such as the triggered channel state information CSI-ReportConfigInfo 1801, and the user equipment UE has ignored the radio resource control RRC parameters republicSet, nzp-CSI-RS-ResourceSetList, or csi-IM-ResourceSetList, or the base station gNB refrains from configuring reportsSet, nzp-CSI-RS-ResourceSetList, or csi-IM-ResourceSetList. The base station gNB transmits one or more radio resource control RRC messages (e.g. radio resource control RRCReconfiguration message or radio resource control RRCResume message) comprising these configurations to the user equipment UE.

[0190] In another embodiment, the base station gNB may configure one zero-power ZP-interference measurement resource IMR and / or one non-zero-power NZP-interference measurement resource IMR associated with the channel measurement resource CMR 1803 corresponding to the combination of channel resource indicators CRI. Then, the channel measurement resource CMR(s) and the interference measurement resource IMR(s) corresponding to the combination of channel resource indicators CRI may be associated in an N-to-1 manner. The interference measurement operations in the above embodiments for the N-to-1 channel measurement resource CMR / interference measurement resource IMR association may be applied.

[0191] In other embodiments, the base station gNB may set up a one-to-one association between the channel measurement resource CMR1803 and the zero-power ZP-interference measurement resource IMR1807, and an N-to-1 association between the channel measurement resource CMR1803 and the non-zero-power NZP-interference measurement resource IMR1809.

[0192] In other embodiments, the base station gNB may set up a one-to-one association between the channel measurement resource CMR1803 and the non-zero power NZP-interference measurement resource IMR1809, as well as an N-to-1 association between the channel measurement resource CMR1803 and the zero power ZP-interference measurement resource IMR1807.

[0193] In an embodiment, for dynamic transmission / reception point TRP selection, the base station gNB is enabled to dynamically select a transmission / reception point TRP based on a beam quality report, for example, Layer 1 Reference Signal Received Power (L1-RSRP) or Layer 1 Signal to Interference Plus Noise (L1-SINR). The base station gNB is enabled to dynamically activate or deactivate some channel measurement resource CMR groups 1813 or channel state information CSI-ReportConfig 1801 by the MAC_CE or by downlink control information DCI. The MAC_CE may include at least one of the following elements:

[0194] Serving cell index, which is used to indicate the serving cell index of the channel state information CSI-ReportConfig. Bandwidth portion index, which is used to indicate the bandwidth portion index of the channel state information CSI-ReportConfig.

[0195] Channel state information CSI report index, which is used to indicate the channel state information CSI-reportConfigId of the channel state information CSI-reportConfig.

[0196] Active channel measurement resource CMR group index(ies), which may be a bitmap indicating which channel measurement resource CMR group index(ies) are activated.

[0197] Transmission configuration status (TCI) index(ies) of the active channel measurement resource(s) CMR, which may be used to indicate the beam / quasi-co-location information of the active channel measurement resource(s) CMR.

[0198] In some embodiments, the base station gNB and the user equipment UE are enabled to determine that interference measurement resource(s) IMR share the same activation / deactivation status with associated channel measurement resource(s) CMR or channel measurement resource CMR group(s).

[0199] In the case of downlink control information DCI-based dynamic activation or triggering, the base station gNB may set candidate channel measurement resource CMR group index(es) in the triggered channel state information CSI-reportConfig corresponding to the channel state information CSI trigger state set by the channel state information CSI-AssociatedReportConfigInfo. Then, the base station gNB may dynamically activate the channel measurement resource CMR group index(es) for the coherent joint transmission CJT-CSI measurement and reporting by indicating the channel state information CSI trigger state in a channel state information CSI request in the downlink control information DCI field of the downlink control information DCI (e.g., downlink control information DCI0_1) that triggers the user equipment UE to transmit a coherent joint transmission CJT-CSI report.

[0200] 19 illustrates an example of an aperiodic channel state information (CSI) trigger state configuration 1900 according to some embodiments. An example implementation of N channel measurement resource (CMR) sets and 1 interference measurement resource (IMR) set in ASN.1 for aperiodic channel state information (CSI) reporting is as follows: CSI-AssociatedReportConfigInfo-r18 ::= SEQUENCE { reportConfigId CSI-ReportConfigId, resourcesForChannel CHOICE { nzp-CSI-RS-setList SEQUENCE (SIZE(1..maxNrofAP-CSI-RS-ResourcesPerSet)) OF Nzp-CSI-RS-Set-r18 csi-SSB-ResourceSet INTEGER (1..maxNrofCSI-SSB-ResourceSetsPerConfig) }, csi-IM-ResourcesForInterference INTEGER(1..maxNrofCSI-IM-ResourceSetsPerConfig) OPTIONAL, -- Cond CSI-IM-ForInterference nzp-CSI-RS-ResourcesForInterference INTEGER (1..maxNrofNZP-CSI-RS-ResourceSetsPerConfig) OPTIONAL, -- Cond NZP-CSI-RS-ForInterference } Nzp-CSI-RS-Set-r18 :: =SEQUENCE { resourceSet INTEGER (1..maxNrofNZP-CSI-RS-ResourceSetsPerConfig), qcl-info SEQUENCE (SIZE(1..maxNrofAP-CSI-RS-ResourcesPerSet)) OF TCI-StateId OPTIONAL -- Cond Aperiodic } An exemplary implementation of a set of N channel measurement resources CMR and a set of N interference measurement resources IMR in ASN.1 for aperiodic channel state information CSI reporting is as follows: CSI-AssociatedReportConfigInfo-r18 ::= SEQUENCE { reportConfigId CSI-ReportConfigId, resourcesList SEQUENCE (SIZE(1.. maxNrofNZP-CSI-RS-ResourceSetsPerConfig)) OF CSI-AssociatedResourceConfigInfo-r18 } CSI-AssociatedResourceConfigInfo-r18 ::= SEQUENCE { resourcesForChannel CHOICE { nzp-CSI-RS SEQUENCE { resourceSet INTEGER (1..maxNrofNZP-CSI-RS-ResourceSetsPerConfig), qcl-info SEQUENCE (SIZE(1..maxNrofAP-CSI-RS-ResourcesPerSet)) OF TCI-StateId OPTIONAL -- Cond Aperiodic }, csi-SSB-ResourceSet INTEGER (1..maxNrofCSI-SSB-ResourceSetsPerConfig) }, csi-IM-ResourcesForInterference INTEGER(1..maxNrofCSI-IM-ResourceSetsPerConfig) OPTIONAL, -- Cond CSI-IM-ForInterference nzp-CSI-RS-ResourcesForInterference INTEGER (1..maxNrofNZP-CSI-RS-ResourceSetsPerConfig) OPTIONAL, -- Cond NZP-CSI-RS-ForInterference } In some embodiments, the base station gNB may include one or more channel state information CSI-AssociatedResourceConfigInfo-r18_IE(s) in the channel state information CSI-AperiodicTriggerStateList-r18_IE, may include the channel state information CSI-AperiodicTriggerStateList-r18 in the channel state information CSI-MeasConfig_IE, and may transmit a radio resource control RRC message comprising the channel state information CSI-MeasConfig_IE to the user equipment UE. Thus, the user equipment UE is enabled to perform reporting for coherent joint transmission CJT-CSI measurement and aperiodic coherent joint transmission CJT-CSI reporting according to the channel measurement resource CMR set(s) and one or more interference measurement resource IMR set(s) configured in the channel state information CSI-AssociatedResourceConfigInfo-r18_IE(s). CSI-AperiodicTriggerStateList-r18 ::= SEQUENCE (SIZE (1..maxNrOfCSI-AperiodicTriggers)) OF CSI-AperiodicTriggerState-r18 CSI-AperiodicTriggerState-r18 ::= SEQUENCE { associatedReportConfigInfoList-r18 SEQUENCE (SIZE(1..maxNrofReportConfigPerAperiodicTrigger-r18)) OF CSI-AssociatedReportConfigInfo-r18, ... } CSI-MeasConfig ::= SEQUENCE { nzp-CSI-RS-ResourceToAddModList SEQUENCE (SIZE (1..maxNrofNZP-CSI-RS-Resources)) OF NZP-CSI-RS-Resource OPTIONAL, -- Need N nzp-CSI-RS-ResourceToReleaseList SEQUENCE (SIZE (1..maxNrofNZP-CSI-RS-Resources)) OF NZP-CSI-RS-ResourceId OPTIONAL, -- Need N nzp-CSI-RS-ResourceSetToAddModList SEQUENCE (SIZE (1..maxNrofNZP-CSI-RS-ResourceSets)) OF NZP-CSI-RS-ResourceSet OPTIONAL, -- Need N nzp-CSI-RS-ResourceSetToReleaseList SEQUENCE (SIZE (1..maxNrofNZP-CSI-RS-ResourceSets)) OF NZP-CSI-RS-ResourceSetId OPTIONAL, -- Need N csi-IM-ResourceToAddModList SEQUENCE (SIZE (1..maxNrofCSI-IM-Resources)) OF CSI-IM-Resource OPTIONAL, -- Need N csi-IM-ResourceToReleaseList SEQUENCE (SIZE (1..maxNrofCSI-IM-Resources)) OF CSI-IM-ResourceId OPTIONAL, -- Need N csi-IM-ResourceSetToAddModList SEQUENCE (SIZE (1..maxNrofCSI-IM-ResourceSets)) OF CSI-IM-ResourceSet OPTIONAL, -- Need N csi-IM-ResourceSetToReleaseList SEQUENCE (SIZE (1..maxNrofCSI-IM-ResourceSets)) OF CSI-IM-ResourceSetId OPTIONAL, -- Need N csi-SSB-ResourceSetToAddModList SEQUENCE (SIZE (1..maxNrofCSI-SSB-ResourceSets)) OF CSI-SSB-ResourceSet OPTIONAL, -- Need N csi-SSB-ResourceSetToReleaseList SEQUENCE (SIZE (1..maxNrofCSI-SSB-ResourceSets)) OF CSI-SSB-ResourceSetId OPTIONAL, -- Need N csi-ResourceConfigToAddModList SEQUENCE (SIZE (1..maxNrofCSI-ResourceConfigurations)) OF CSI-ResourceConfig OPTIONAL, -- Need N csi-ResourceConfigToReleaseList SEQUENCE (SIZE (1..maxNrofCSI-ResourceConfigurations)) OF CSI-ResourceConfigId OPTIONAL, -- Need N csi-ReportConfigToAddModList SEQUENCE (SIZE (1..maxNrofCSI-ReportConfigurations)) OF CSI-ReportConfig OPTIONAL, -- Need N csi-ReportConfigToReleaseList SEQUENCE (SIZE (1..maxNrofCSI-ReportConfigurations)) OF CSI-ReportConfigId OPTIONAL, -- Need N reportTriggerSize INTEGER (0..6) OPTIONAL, -- Need M aperiodicTriggerStateList SetupRelease { CSI-AperiodicTriggerStateList} OPTIONAL, -- Need M semiPersistentOnPUSCH-TriggerStateList SetupRelease { CSI-SemiPersistentOnPUSCH-TriggerStateList} OPTIONAL, -- Need M ..., [[ reportTriggerSizeDCI-0-2-r16 INTEGER (0..6) OPTIONAL -- Need R ]], [[ sCellActivationRS-ConfigToAddModList-r17 SEQUENCE (SIZE (1..maxNrofSCellActRS-r17)) OF SCellActivationRS-Config-r17 OPTIONAL, -- Need N sCellActivationRS-ConfigToReleaseList-r17 SEQUENCE (SIZE (1..maxNrofSCellActRS-r17)) OF SCellActivationRS-ConfigId-r17 OPTIONAL -- Need N ]], [[ aperiodicTriggerStateList-r18 SetupRelease { CSI-AperiodicTriggerStateList(-r18)} OPTIONAL, -- Need M ]] } To configure coherent joint transmission CJT-CSI measurement and reporting, the base station gNB may send channel state information CSI configuration parameters, aperiodicTriggerStateList(-r18) (e.g., a list of channel state information CSI trigger states), csi-ReportConfigtoAddModList (e.g., a list of channel state information CSI-ReportConfig_IE(s)), csi-ResourceConfigToAddModList, and nzp-CSI-RS-ResourceToAddModList, to the user equipment UE. The aperiodicTriggerStateList(-r18) is only applicable to aperiodic channel state information CSI reporting. For periodic and semi-persistent channel state information CSI reporting, the user equipment UE follows the configuration of each channel state information CSI-ReportConfig. In some embodiments, the base station gNB transmits at least one radio resource control RRC message (e.g., radio resource control RRCReconfiguration message(s) and / or radio resource control RRCResume message(s)) comprising channel state information CSI configuration parameters to the user equipment UE.

[0201] In some embodiments, each of the at least one channel state information CSI-ReportConfig_IE in the channel state information CSI-ReportConfigtoAddModList comprises a list of channel state information CSI resource group configuration(s) that configure the channel measurement resource CMR group(s) as shown below: The following example embodiments may be applied to periodic, semi-persistent, and aperiodic coherent joint transmit CJT-CSI reporting. <Example Implementation 1 of Channel State Information CSI-ReportConfig_IE> CSI-ReportConfig ::= SEQUENCE { reportConfigId CSI-ReportConfigId, carrier ServCellIndex OPTIONAL, -- Need S resourcesForChannelMeasurement CSI-ResourceConfigId, csi-IM-ResourcesForInterference CSI-ResourceConfigId OPTIONAL, -- Need R nzp-CSI-RS-ResourcesForInterference CSI-ResourceConfigId OPTIONAL, -- Need R reportConfigType CHOICE { periodic SEQUENCE { reportSlotConfig CSI-ReportPeriodicityAndOffset, pucch-CSI-ResourceList SEQUENCE (SIZE (1..maxNrofBWPs)) OF PUCCH-CSI-Resource }, semiPersistentOnPUCCH SEQUENCE { reportSlotConfig CSI-ReportPeriodicityAndOffset, pucch-CSI-ResourceList SEQUENCE (SIZE (1..maxNrofBWPs)) OF PUCCH-CSI-Resource }, semiPersistentOnPUSCH SEQUENCE { reportSlotConfig ENUMERATED {sl5, sl10, sl20, sl40, sl80, sl160, sl320}, reportSlotOffsetList SEQUENCE (SIZE (1.. maxNrofUL-Allocations)) OF INTEGER(0..32), p0alpha P0-PUSCH-AlphaSetId }, aperiodic SEQUENCE { reportSlotOffsetList SEQUENCE (SIZE (1..maxNrofUL-Allocations)) OF INTEGER(0..32) } }, reportQuantity CHOICE { none NULL, cri-RI-PMI-CQI NULL, cri-RI-i1 NULL, cri-RI-i1-CQI SEQUENCE { pdsch-BundleSizeForCSI ENUMERATED {n2, n4} OPTIONAL -- Need S }, cri-RI-CQI NULL, cri-RSRP NULL, ssb-Index-RSRP NULL, cri-RI-LI-PMI-CQI NULL }, ---other fields / IEs omitted for simplification--- [[ csi-ResourcesGroupConfigList-r18 SEQUENCE (SIZE (1..N)) OF CSI-ResourcesGroupConfig-r18 OPTIONAL, -- Need Code (e.g., N, R, M or S) ]] } CSI-ResourcesGroupConfig-r18 ::= SEQUENCE { resourcesForChannelMeasurement-r18 CSI-ResourceConfigId, csi-IM-ResourcesForInterference-r18 CSI-ResourceConfigId OPTIONAL, -- Need R nzp-CSI-RS-ResourcesForInterference-r18 CSI-ResourceConfigId OPTIONAL, -- Need R } As shown in exemplary embodiment 1, the base station gNB may configure N channel measurement resource CMR group(s) and / or N interference measurement resource IMR group(s) by including csi-ResourcesGroupConfigList-r18 with channel state information CSI-ResouresGroupConfig_IE(s) 1, ..., N of the channel state information CSI-ReportConfig_IE. That is, the channel state information CSI-ResouresGroupConfig_IE(s) 1, ..., N correspond to the channel measurement resource CMR group(s) 1, ..., N. In one embodiment, the base station gNB and the user equipment UE each determine the channel state information CSI-ResouresGroupConfig_IE(s) 1, ..., N of indexes 1, ..., N according to the order of the channel state information CSI-ResouresGroupConfig_IE(s) 1, ..., N in csi-ResourcesGroupConfigList-r18. In this embodiment, the base station gNB and the user equipment UE may ignore or discard resourcesForChannelMeasurement, csi-IM-ResourcesForInterference, and nzp-CSI-RS-ResourcesForInterference. <Example Implementation 2 of Channel State Information CSI-ReportConfig_IE> CSI-ReportConfig ::= SEQUENCE { reportConfigId CSI-ReportConfigId, carrier ServCellIndex OPTIONAL, -- Need S resourcesForChannelMeasurement CSI-ResourceConfigId, csi-IM-ResourcesForInterference CSI-ResourceConfigId OPTIONAL, -- Need R nzp-CSI-RS-ResourcesForInterference CSI-ResourceConfigId OPTIONAL, -- Need R reportConfigType CHOICE { periodic SEQUENCE { reportSlotConfig CSI-ReportPeriodicityAndOffset, pucch-CSI-ResourceList SEQUENCE (SIZE (1..maxNrofBWPs)) OF PUCCH-CSI-Resource }, semiPersistentOnPUCCH SEQUENCE { reportSlotConfig CSI-ReportPeriodicityAndOffset, pucch-CSI-ResourceList SEQUENCE (SIZE (1..maxNrofBWPs)) OF PUCCH-CSI-Resource }, semiPersistentOnPUSCH SEQUENCE { reportSlotConfig ENUMERATED {sl5, sl10, sl20, sl40, sl80, sl160, sl320}, reportSlotOffsetList SEQUENCE (SIZE (1.. maxNrofUL-Allocations)) OF INTEGER(0..32), p0alpha P0-PUSCH-AlphaSetId }, aperiodic SEQUENCE { reportSlotOffsetList SEQUENCE (SIZE (1..maxNrofUL-Allocations)) OF INTEGER(0..32) } }, reportQuantity CHOICE { none NULL, cri-RI-PMI-CQI NULL, cri-RI-i1 NULL, cri-RI-i1-CQI SEQUENCE { pdsch-BundleSizeForCSI ENUMERATED {n2, n4} OPTIONAL -- Need S }, cri-RI-CQI NULL, cri-RSRP NULL, ssb-Index-RSRP NULL, cri-RI-LI-PMI-CQI NULL }, ---other fields / IEs omitted for simplification--- [[ csi-ResourcesGroupConfigList-r18 SEQUENCE (SIZE (2..N)) OF CSI-ResourcesGroupConfig-r18 OPTIONAL, -- Need Code (e.g., N, R, M or S) ]] } CSI-ResourcesGroupConfig-r18 ::= SEQUENCE { resourcesForChannelMeasurement-r18 CSI-ResourceConfigId, csi-IM-ResourcesForInterference-r18 CSI-ResourceConfigId OPTIONAL, -- Need R nzp-CSI-RS-ResourcesForInterference-r18 CSI-ResourceConfigId OPTIONAL, -- Need R } As shown in exemplary embodiment 2, the base station gNB may configure N−1 channel measurement resource CMR group(s) and / or N interference measurement resource IMR group(s) by including a csi-ResourcesGroupConfigList-r18 with channel state information CSI-ResourcesGroupConfig-r18IE(s) 2, ..., N of the channel state information CSI-ReportConfig_IE. That is, the channel state information CSI-ResouresGroupConfigIE(s) 2, ..., N correspond to the channel measurement resource CMR group(s) 1, ..., N. In one embodiment, the base station gNB and the user equipment UE each determine the channel state information CSI-ResouresGroupConfig_IE(s) 2, ..., N of indexes 2, ..., N according to the order of the channel state information CSI-ResouresGroupConfig_IE(s) 2, ..., N in the csi-ResourcesGroupConfigList-r18. In this embodiment, the base station gNB and the user equipment UE determine resourcesForChannelMeasurement, csi-IM-ResourcesForInterference, and nzp-CSI-RS-ResourcesForInterference as channel measurement resource CMR group 1 having index 1.

[0202] According to any one of exemplary embodiments 1 and 2, the base station gNB is enabled to provide one or more channel state information CSI-ReportConfig_IEs in the csi-ReportConfigToAddModList, provide the csi-ReportConfigToAddModList with the channel state information CSI-MeasConfig_IE, and transmit the csi-ReportConfigToAddModList to the user equipment UE. Thus, the user equipment UE is enabled to perform coherent joint transmission CJT-CSI measurement and reporting according to the channel state information CSI-ReportConfig_IE(s). <Exemplary Embodiment 3 of Channel State Information CSI-ReportConfig_IE> CSI-ReportConfig-r18 ::= SEQUENCE { reportConfigId-r18 CSI-ReportConfigId, carrier-r18 ServCellIndex OPTIONAL, -- Need S csi-ResourcesGroupConfigList-r18 SEQUENCE (SIZE (1..N)) OF CSI-ResourcesGroupConfig-r18 OPTIONAL, -- Need Code (e.g., N, R, M or S) reportConfigType-r18 CHOICE { periodic SEQUENCE { reportSlotConfig CSI-ReportPeriodicityAndOffset, pucch-CSI-ResourceList SEQUENCE (SIZE (1..maxNrofBWPs)) OF PUCCH-CSI-Resource }, semiPersistentOnPUCCH SEQUENCE { reportSlotConfig CSI-ReportPeriodicityAndOffset, pucch-CSI-ResourceList SEQUENCE (SIZE (1..maxNrofBWPs)) OF PUCCH-CSI-Resource }, semiPersistentOnPUSCH SEQUENCE { reportSlotConfig ENUMERATED {sl5, sl10, sl20, sl40, sl80, sl160, sl320}, reportSlotOffsetList SEQUENCE (SIZE (1.. maxNrofUL-Allocations)) OF INTEGER(0..32), p0alpha P0-PUSCH-AlphaSetId }, aperiodic SEQUENCE { reportSlotOffsetList SEQUENCE (SIZE (1..maxNrofUL-Allocations)) OF INTEGER(0..32) } }, reportQuantity-r18 CHOICE { none NULL, cri-RI-PMI-CQI NULL, cri-RI-i1 NULL, cri-RI-i1-CQI SEQUENCE { pdsch-BundleSizeForCSI ENUMERATED {n2, n4} OPTIONAL -- Need S }, cri-RI-CQI NULL, cri-RSRP NULL, ssb-Index-RSRP NULL, cri-RI-LI-PMI-CQI NULL }, ---other fields / IEs (e.g., defined in 3GPP specificaiton 38.331) may be added--- } CSI-ResourcesGroupConfig-r18 ::= SEQUENCE { resourcesForChannelMeasurement-r18 CSI-ResourceConfigId, csi-IM-ResourcesForInterference-r18 CSI-ResourceConfigId OPTIONAL, -- Need R nzp-CSI-RS-ResourcesForInterference-r18 CSI-ResourceConfigId OPTIONAL, -- Need R } As shown in exemplary embodiment 3, the base station gNB may configure N channel measurement resource CMR group(s) and / or N interference measurement resource IMR group(s) by including a csi-ResourcesGroupConfigList-r18 with channel state information CSI-ReportConfig-r18_IE. That is, the channel state information CSI-ResouresGroupConfigIE(s) 1, ..., N correspond to the channel measurement resource CMR group(s) 1, ..., N. In one embodiment, the base station gNB and the user equipment UE each determine the channel state information CSI-ResouresGroupConfig_IE(s) 1, ..., N of indexes 1, ..., N according to the order of the channel state information CSI-ResouresGroupConfig_IE(s) 1, ..., N in the csi-ResourcesGroupConfigList-r18.

[0203] In some embodiments, the base station gNB may include one or more channel state information CSI-ReportConfig-r18_IE(s) in the channel state information CSI-ReportConfigToAddModList-r18, may include the channel state information CSI-ReportConfigToAddModList-r18 in the channel state information CSI-MeasConfigIE, and may transmit a radio resource control RRC message comprising the channel state information CSI-MeasConfig_IE to the user equipment UE. Thus, the user equipment UE is enabled to perform coherent joint transmission CJT-CSI measurement and reporting according to the channel measurement resource CMR set(s) and one or more interference measurement resource IMR set(s) configured in the channel state information CSI-ReportConfig-r18IE(s). CSI-MeasConfig ::= SEQUENCE { ---fields / IEs shown above are omitted for simplification--- [[ csi-ReportConfigToAddModList-r18 SEQUENCE (SIZE (1..maxNrofCSI-ReportConfigurations(-r18))) OF CSI-ReportConfig OPTIONAL, -- Need N csi-ReportConfigToReleaseList-r18 SEQUENCE (SIZE (1..maxNrofCSI-ReportConfigurations(-r18))) OF CSI-ReportConfigId ]] } In some embodiments, an information element IE having a suffix "-r18" can be replaced with "v18xy", where "x" and "y" can be integers. The names of the fields or information element IEs above are for purposes of explaining this disclosure. It should be noted that the names of the fields or information element IEs can be changed to similar ones. A "channel measurement resource CMR group" and a "CRM set" can be interchangeable. An "interference measurement resource IMR group" and an "IRM set" can be interchangeable.

[0204] In an embodiment, for each transmission / reception point TRP of the coherent joint transmission CJT-CSI report, the base station gNB may provide a common codebook configuration, for example, codebookConfig, to the user equipment UE by radio resource control RRC signaling.

[0205] In other embodiments, for each transmission / reception point TRP of the coherent joint transmission CJT-CSI report, the base station gNB may provide a separate codebook configuration to the user equipment UE by radio resource control (RRC) signaling. In one embodiment, a codebook configuration list may be provided, with each codebook configuration corresponding to each transmission / reception point TRP. In other embodiments, a common radio resource control (RRC) signaling codebookConfig may be provided, but within this radio resource control (RRC) structure, the base station gNB is enabled to configure a list of several parameters of codebookConfig to provide several configurations for the transmission / reception point (TRP) separately, e.g., numberOfPMI-SubbandsPerChannelQualityIndicatorCQI-SubbandList, paramCombinationList, etc.

[0206] In an embodiment, to reduce the user equipment UE's memory for signal buffering, the base station gNB may refrain from configuring different periodicities or different periodicities and offsets for periodic / semi-persistent channel state information reference signals CSI-RS from different transmit / receive point TRPs configured for coherent joint transmit CJT-CSI measurement, where the periodicities and offsets are configured by radio resource control (RRC) signaling periodicityAndOffset. In some embodiments, the user equipment UE is enabled to report its capability regarding whether it supports coherent joint transmit CJT-CSI measurement of periodic / semi-persistent channel state information reference signals CSI-RS from different transmit / receive point TRPs configured with different periodicities and / or offsets. The user equipment UE may further report its capability regarding the number of different periodicities and / or offsets it can support, which may be less than the maximum number (e.g., four) of transmit / receive point TRPs for coherent joint transmit CJT operation.

[0207] Further, regarding the impact of automatic gain control (AGC) of the user equipment UE, the base station gNB transmits channel state information reference signals CSI-RS for coherent joint transmit CJT-CSI measurement within a slot or within S consecutive slots(s), where S may be predefined by the user equipment UE capabilities or may be reported from the user equipment UE to the base station gNB. Thus, a common automatic gain control AGC coefficient may be applied to all channel state information reference signals CSI-RS.

[0208] In an embodiment, to reduce the complexity of a user equipment (UE) for channel state information (CSI) measurement and wideband and / or subband coherent joint transmission (CJT-CSI) reporting, a base station (gNB) may refrain from configuring different physical resource blocks (PRBs) for channel state information reference signals (CSI-RS) from different transmit / receive points (TRPs) configured for coherent joint transmission (CJT-CSI) measurement, where the PRBs for the channel state information reference signals (CSI-RS) are configured by radio resource control (RRC) signaling (frequencyDomainAllocation). In some embodiments, a user equipment (UE) is enabled to report its capability regarding whether it supports coherent joint transmission (CJT-CSI) measurement for channel state information reference signals (CSI-RS) having different PRBs. The user equipment (UE) may further report its capability regarding the number of different PRBs it can support, which may be less than the maximum number (e.g., four) of transmit / receive points (TRPs) for coherent joint transmission (CJT) operation. In some embodiments, when the PRBs of the channel state information reference signals CSI-RS for coherent joint transmission CJT-CSI measurement are configured to be different, the user equipment UE may measure the coherent joint transmission CJT-CSI for the PRBs that are common among the channel state information reference signals CSI-RS.

[0209] In an embodiment, the base station gNB can set the ratio of energy per resource element (EPRE) between the PDSCH and the channel state information reference signal CSI-RS from the same transmission / reception point TRP by means of upper layer signaling, for example, radio resource control RRC signaling within a non-zero power NZP-CSI-RS-Resource, or radio resource control RRC signaling in MAC_CE or downlink control information DCI. In one example, for a semi-persistent channel state information reference signal CSI-RS, the EPRE ratio can be set by MAC_CE for the activation of the semi-persistent channel state information reference signal CSI-RS. In another example, for an aperiodic channel state information reference signal CSI-RS, different EPRE ratios can be associated with different channel state information CSI trigger states, and the base station gNB can indicate different channel state information CSI trigger states by indicating different values of channel state information CSI_request in downlink control information DCI.

[0210] For antenna combining weight selection for channel state information CSI measurement of coherent joint transmission CJT, the user equipment UE is enabled to construct a combined channel from all configured transmission / reception points TRP based on the estimated channel and power offset. In one example, for coherent joint transmission CJT from four transmission / reception points TRP, the channel can be

[0211]

Number

[0212] constructed as, where τ j represents the power scaling factor of transmission / reception point TRPj. This power scaling factor can be determined based on the EPRE ratio between the channel state information reference signal CSI-RS and the PDSCH.

[0213] <CPU Occupancy Rule and Minimum Processing Delay> The user equipment UE is enabled to ignore or discard the downlink control information DCI and trigger a channel state information CSI report or report old channel state information CSI if the number of occupied CPUs due to scheduling by the base station gNB exceeds the maximum number of CPUs that the user equipment UE has reported in its capabilities or if the scheduling offset is smaller than the minimum processing delay of the channel state information CSI report. In some embodiments, the user equipment UE is enabled to assume or determine that such scheduling is an error case.

[0214] In an embodiment, in the case of channel measurement resource CMR grouping scheme 1, for example, the channel measurement resources CMR in a group correspond to different transmission / reception points TRP as in Figures 16 and 17, and in such channel state information CSI-ReportConfig, the number of CPUs may be predefined or determined based on the number of channel measurement resource CMR groups and / or the number of channel measurement resources CMR in each group.

[0215] In an embodiment, the base station gNB and the user equipment UE

[0216]

number

[0217] This CPU occupancy rule assumes that one CPU is occupied in the user equipment UE to measure a precoder for one transmission / reception point TRP, and other CPUs are used to measure cross transmission / reception point TRP antenna coupling coefficients for each group and other channel state information (CSI).

[0218] In another embodiment, the base station gNB and the user equipment UE

[0219]

number

[0220] It is possible to assume that the CPU may be occupied. This CPU occupancy rule assumes that one CPU is occupied in the user equipment UE to measure a precoder for one transmission / reception point TRP, and one of the CPUs used for transmission / reception point TRP precoder search may be used to measure cross transmission / reception point TRP antenna coupling coefficients for each group and other channel state information (CSI) information.

[0221] In another embodiment, the base station gNB and the user equipment UE may assume that S+N CPUs can be occupied, where S denotes the maximum number of different channel measurement resources CMR of the channel state information CSI-ReportConfig. This CPU occupancy rule assumes that one CPU is occupied in the user equipment UE to measure the precoder for one transmission / reception point TRP, and the user equipment UE only calculates the overlapped channel measurement resource(s) CMR once, and uses the other CPUs to measure the cross transmission / reception point TRP antenna coupling coefficients for each group and other channel state information CSI information.

[0222] In another embodiment, the base station gNB and the user equipment UE may assume that S CPUs can be occupied, where “S” denotes the maximum number of different channel measurement resources CMR of the channel state information CSI-reportConfig. This CPU occupancy rule assumes that one CPU is occupied in the user equipment UE to measure a precoder for one transmission / reception point TRP, and the user equipment UE only needs to calculate the overlapping channel measurement resource(s) CMR once, and one of the CPUs used for the transmission / reception point TRP precoder search can be used to measure cross-transmission / reception point TRP antenna coupling coefficients for each group and other channel state information CSI information.

[0223] In another embodiment, the base station gNB and the user equipment UE are enabled to assume that N CPUs may be occupied, where the CPU occupancy rule assumes that one CPU is occupied per channel measurement resource CMR group, and no parallel processing is enabled within the channel measurement resource CMR group.

[0224] In another embodiment, the base station gNB and the user equipment UE are allowed to assume that one CPU may be occupied, and this CPU occupancy rule assumes that parallel processing does not apply.

[0225] In another embodiment, for channel measurement resource CMR grouping scheme 2, for example, a channel measurement resource CMR in a group corresponds to one transmission / reception point TRP as in FIG. 18, and in such channel state information CSI-ReportConfig, the number of CPUs may be predefined or may be determined based on the number of channel measurement resources CMR in each group.

[0226] In an embodiment, the base station gNB and the user equipment UE

[0227]

number

[0228] This CPU occupancy rule assumes that one CPU is occupied in the user equipment UE to measure a precoder for one transmission / reception point TRP, and other CPUs are used to measure cross transmission / reception point TRP antenna coupling coefficients for each group and other channel state information (CSI).

[0229] In another embodiment, the base station gNB and the user equipment UE

[0230]

number

[0231] This CPU occupancy rule assumes that one CPU is occupied in the user equipment UE to measure a precoder for one transmission / reception point TRP, and one of the CPUs used for transmission / reception point TRP precoder search may be used to measure cross transmission / reception point TRP antenna coupling coefficients for each group and other channel state information (CSI) information.

[0232] In another embodiment, the base station gNB and the user equipment UE

[0233]

number

[0234] The CPU occupancy rule assumes that one CPU is occupied for channel resource indicator(s) CRI(s) combination processing, and no parallel processing is enabled for channel resource indicator(s) CRI(s) combination.

[0235] In another embodiment, the base station gNB and the user equipment UE are allowed to assume that one CPU may be occupied, and this CPU occupancy rule assumes that parallel processing does not apply.

[0236] In an embodiment, the minimum processing delay of the coherent joint transmit CJT-CSI report may be predefined. In one embodiment, the minimum processing delay of the coherent joint transmission CJT-CSI report may be the same as that of the channel state information CSI report of Type 2. In one example, it may be (Z2, Z2′) defined in Section 5.4 of 3GPP TS 38.214.

[0237] In another embodiment, the minimum processing delay is determined based on the maximum number of transmit / receive point TRPs configured for a coherent joint transmission CJT-CSI report and the minimum processing delay of a Type 2 channel state information CSI report. The maximum number of transmit / receive point TRPs configured for a coherent joint transmission CJT-CSI report may be referred to as the maximum number of channel measurement resource CMR groups associated with a coherent joint transmission CJT-CSI report or the maximum number of channel measurement resource CMR(s) in a channel measurement resource CMR group. In one example, it is expressed as (r*N TRP *Z2, r*N TRP *Z2′), where r may be in the range of (0,1), which may be predefined or configured by radio resource control (RRC) signaling from the base station gNB, or may be reported by a user equipment (UE) function.

[0238] In another embodiment, the user equipment UE is enabled to report its capability to minimize processing delay for coherent joint transmission CJT-CSI reporting (Z, Z').

[0239] In one embodiment, the user equipment UE is enabled to report multiple pairs of (Z, Z') for different numbers of transmit / receive point TRPs. For example, a user equipment UE supporting coherent joint transmission CJT with up to four transmit / receive point TRPs can report three pairs of (Z, Z') for two transmit / receive point TRPs, three transmit / receive point TRPs, and four transmit / receive point TRP-based coherent joint transmission CJTs, respectively.

[0240] In another embodiment, the user equipment UE can report one pair of (Z, Z′) regardless of the number of transmission / reception points TRP of the coherent joint transmission CJT, and the user equipment UE function is applied to the coherent joint transmission CJT-CSI reporting having a different number of transmission / reception points TRP.

[0241] In another embodiment, the user equipment UE is enabled to report a pair (Z, Z′) assuming one number of transmit / receive point TRPs, for example, two transmit / receive point TRPs. For coherent joint transmission CJT-CSI with a different number of transmit / receive point TRPs, the minimum processing delay may be determined based on the number of transmit / receive point TRPs and the reported (Z, Z′), for example, as (ceil(X / 2)*Z,ceil(X / 2)*Z′), where X indicates the number of transmit / receive point TRPs configured in the channel state information CSI report. In some cases, X indicates the number of channel measurement resource CMR groups or the number of channel measurement resource CMR(s) of the channel measurement resource CMR group associated with the coherent joint transmission CJT-CSI report.

[0242] Unless otherwise specified, terms such as "establishing," "receiving," and "transmitting" refer to actions and processes performed or implemented by a computing device that manipulate data represented as physical (electronic) quantities in the registers and memory of the computing device into other data that are similarly represented as physical quantities in the memory or registers of the computing device, or other such information storage, transmission, or display device. Also, as used herein, terms such as "first," "second," "third," and "fourth" are intended as labels to distinguish different elements and do not necessarily imply an ordering according to their numerical designations.

[0243] The examples described herein also relate to apparatus for performing the operations described herein. The apparatus may be specially constructed for the required purposes, or may comprise a general-purpose computing device that is 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.

[0244] The methods and illustrative examples described herein are not inherently related to any particular computer or other apparatus. Various general-purpose systems may be used in accordance with the teachings described herein, or it may prove convenient to construct specialized apparatus to perform the required method steps. The required structure for a variety of these systems is set forth in the description above.

[0245] The above description is intended to be illustrative, not limiting. While the present disclosure has been described with reference to certain illustrative examples, it will be recognized 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, along with the full scope of equivalents to which such claims are entitled.

[0246] As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It is to be further understood that the terms "includes," "comprising," "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. Thus, the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting.

[0247] It should also be noted that in some alternative implementations, the functions / acts shown may occur out of the order noted in the figures. For example, two figures shown in succession may, in fact, be executed substantially concurrently or may sometimes be executed in the reverse order, depending on the functions / acts involved.

[0248] Although the method operations are described in a particular order, other operations may occur between the operations described, the operations described may be arranged to occur at slightly different times, or the operations described may be distributed in a system that allows the operation of the process to occur at various intervals relative to the process.

[0249] Various units, circuits, or other components may be described or claimed as being "configured to" or "configurable to" perform a task or tasks. In this context, the phrase "configured to" or "configurable to" is used to connote structure by indicating that the unit / circuit / component comprises structure (e.g., circuitry) that performs the task or tasks during operation. In this manner, a unit / circuit / component can be said to be configured to perform a task or to be configurable to perform a task even when the specified unit / circuit / component is not currently operating (e.g., not turned on). A unit / circuit / component used in conjunction with the language "configured to" or "configurable to" comprises hardware—e.g., circuitry, memory that stores executable program instructions to perform an operation, etc. It is expressly intended that a statement that a unit / circuit / component is "configured to" perform one or more tasks or "configurable to" perform one or more tasks does not invoke 35 U.S.C. § 112, sixth paragraph—with respect to that unit / circuit / component. Additionally, "configured to" or "configurable to" can comprise a general structure (e.g., a general circuit) that is operated by software and / or firmware (e.g., software running on an FPGA or general-purpose processor) to operate in a manner that enables it to perform the task(s) in question. "Configured to" can also include adapting a manufacturing process (e.g., a semiconductor manufacturing facility) to produce devices (e.g., integrated circuits) that perform or are adapted to perform one or more tasks. It is expressly intended that "configurable to" does not apply to blank media, unprogrammed processors, or unprogrammed general-purpose computers, or unprogrammed programmable logic devices, programmable gate arrays, or other unprogrammed devices, unless the unprogrammed devices are accompanied by programmed media that confers the ability to be configured to perform the disclosed function(s).

[0250] The foregoing description has been set forth with reference to specific embodiments for purposes of illustration. However, the above illustrative description is not intended to be exhaustive or to limit the disclosure to the precise form disclosed. Many modifications and variations are possible in light of the above teachings. The embodiments have been chosen and described to best explain the principles of the embodiments and their practical application, and to thereby enable others skilled in the art to best utilize the embodiments and various modifications as may be adapted for the particular use contemplated. Therefore, the present embodiments are to be considered as illustrative and not restrictive, and the disclosure is not to be limited to the details described herein, but may be modified within the scope of the appended claims and their equivalents.

[0251] <Example> <Example(s) of User Equipment (UE)> Example 1 is an apparatus comprising a processor, the processor configured to: a. transmitting a user equipment (UE) capability for codebook-based channel state information (CSI) reporting for high / medium user equipment (UE) speeds; b. decoding control signaling for channel state information CSI reporting configuration for a channel state information CSI report, the control signaling having a codebook configured for channel state information CSI measurement based on channel measurement resource(s) (CMR), interference measurement resource(s) (IMR), and multiple instances of at least one channel state information reference signal (CSI-RS) configured as time instances for channel state information CSI measurement; c. receiving the channel measurement resource (CMR) and the interference measurement resource (IMR) at corresponding time instances for channel state information (CSI) measurements; d. causing the precoder to measure based on at least one time instance(s) of at least one channel measurement resource(s) CMR and at least one layer indicator (LI) and / or channel quality indicator (CQI) based on the at least one instance of the channel measurement resource(s) CMR; e. causing the channel state information CSI report to be transmitted, the CSI report comprising at least one of the measured precoder, a channel quality indicator CQI, and a layer indicator LI.

[0252] Example 2 is the apparatus of example 1, wherein the number of instances of the channel measurement resource CMR for the channel state information CSI measurements can be configured by radio resource control (RRC) signaling.

[0253] Example 3 is the apparatus of example 1, wherein the number of instances of channel measurement resource CMR for channel state information (CSI) measurements may be configured by MAC_CE. Example 4 is the apparatus of example 1, wherein the number of instances of channel measurement resources CMR for channel state information CSI measurements can be configured by downlink control information DCI.

[0254] Example 5 is the apparatus of Example 1, wherein the user equipment (UE) is enabled to report the number of instances of channel measurement resource (CMR) for channel state information (CSI) measurements in a channel state information (CSI) report.

[0255] Example 6 is the apparatus of example 1, wherein the number of time domain bases of the codebook for high / medium user equipment (UE) speeds can be configured by radio resource control (RRC) signaling. Example 7 is the apparatus of example 1, wherein the channel state information (CSI) measurement scheme can be configured by radio resource control (RRC) signaling; A first scheme is to measure the channel state information (CSI) based on an actual channel measurement resource (CMR) instance; The second scheme is to measure the channel state information CSI based on a virtual channel measurement resource CMR instance.

[0256] Example 8 is the apparatus of Example 7, wherein, for the second channel state information (CSI) measurement scheme, a starting offset of the first virtual channel measurement resource (CMR) instance and an interval between two consecutive instances can be configured by radio resource control (RRC) signaling.

[0257] Example 9 is the apparatus of example 1, wherein the aperiodic channel state information reference signal CSI-RS having multiple instances can be triggered by downlink control information DCI.

[0258] Example 10 is the apparatus of Example 9, wherein the number of instances of aperiodic channel state information reference signal (CSI-RS) resources and the interval between two consecutive instances can be configured by radio resource control (RRC) signaling.

[0259] Example 11 is the apparatus of Example 9, wherein the number of instances of aperiodic channel state information reference signal (CSI-RS) resources and the interval between two consecutive instances can be configured by downlink control information (DCI).

[0260] Example 12 is the apparatus of Example 9, wherein the aperiodic channel state information CSI resource set having channel state information reference signal CSI-RS resources from the same port(s) with an interval between two consecutive channel state information reference signal CSI-RS resources is triggered by downlink control information DCI.

[0261] Example 13 is the apparatus of Example 12, wherein whether the channel state information reference signal (CSI-RS) resources of an aperiodic resource set are from the same port(s) is configured by radio resource control (RRC) signaling.

[0262] Example 14 is the apparatus of example 12, wherein the spacing between the two consecutive channel state information reference signal (CSI-RS) resources of an aperiodic resource set is configured by radio resource control (RRC) signaling.

[0263] Example 15 is the apparatus of example 1, wherein the user equipment UE reports the layer indicator LI and the channel quality indicator CQI corresponding to one channel measurement resource CMR instance.

[0264] Example 16 is the apparatus of example 15, wherein the channel measurement resource CMR index may be the first or last channel measurement resource CMR index. Example 17 is the apparatus of example 15, wherein the channel measurement resource CMR index can be configured by radio resource control (RRC) signaling.

[0265] Example 18 is the apparatus of example 15, wherein the channel measurement resource CMR index can be reported by the user equipment UE. Example 19 is the apparatus of Example 1, wherein the user equipment UE reports a plurality of the layer indicators LI and channel quality indicators CQI corresponding to a plurality of channel measurement resource CMR instances.

[0266] Example 20 is the apparatus of example 19, wherein the user equipment UE reports the layer indicator LI and the channel quality indicator CQI corresponding to each channel measurement resource CMR instance.

[0267] Example 21 is the apparatus of Example 19, wherein the user equipment UE reports the layer indicators LI and channel quality indicators CQI corresponding to channel measurement resource CMR instances having the highest or lowest energy among the channel measurement resource CMR instances.

[0268] <Example of base station BS (multiple possible)> Example 1 is an apparatus comprising a processor, the processor configured to: a. decoding the user equipment UE capability for codebook-based channel state information (CSI) reporting for high / medium user equipment UE speed; b. transmitting control signaling for channel state information CSI reporting configuration for a channel state information CSI report having a codebook configured for channel state information CSI measurement based on channel measurement resource(s) (CMR), interference measurement resource(s) (IMR), and multiple instances of at least one channel state information reference signal (CSI-RS) configured as time instances for channel state information CSI measurement; c. transmitting said channel measurement resource(s) CMR and said interference measurement resource(s) IMR; d. decoding the channel state information CSI report based on the corresponding channel state information CSI reporting configuration; e. determining the time instance of the channel measurement resource(s) CMR for the decoded channel state information (CSI) report; f. configured to identify precoder(s) and a modulation and coding scheme (MCS) for a physical downlink shared channel (PDSCH) transmission at a time instance based on the decoded channel state information (CSI) and the determined time instance of the channel measurement resource (CMR).

[0269] Example 2 is the apparatus of example 1, wherein the number of instances of the channel measurement resource CMR for the channel state information CSI measurements can be configured by radio resource control (RRC) signaling.

[0270] Example 3 is the apparatus of example 1, wherein the number of instances of channel measurement resource CMR for channel state information (CSI) measurements may be configured by MAC_CE. Example 4 is the apparatus of example 1, wherein the number of instances of channel measurement resources CMR for channel state information CSI measurements can be configured by downlink control information DCI.

[0271] Example 5 is the apparatus of example 1, wherein the base station BS is enabled to decode the number of instances of channel measurement resource CMR for channel state information CSI measurements in a channel state information CSI report.

[0272] Example 6 is the apparatus of example 1, wherein the number of time domain bases of the codebook for high / medium user equipment (UE) speeds can be configured by radio resource control (RRC) signaling. Example 7 is the apparatus of example 1, wherein the channel state information (CSI) measurement scheme can be configured by radio resource control (RRC) signaling; A first scheme is to measure the channel state information (CSI) based on an actual channel measurement resource (CMR) instance; The second scheme is to measure the channel state information CSI based on a virtual channel measurement resource CMR instance.

[0273] Example 8 is the apparatus of Example 7, wherein, for the second channel state information (CSI) measurement scheme, a starting offset of the first virtual channel measurement resource (CMR) instance and an interval between two consecutive instances can be configured by radio resource control (RRC) signaling.

[0274] Example 9 is the apparatus of example 1, wherein the aperiodic channel state information reference signal CSI-RS having multiple instances can be triggered by downlink control information DCI.

[0275] Example 10 is the apparatus of Example 9, wherein the number of instances of aperiodic channel state information reference signal (CSI-RS) resources and the interval between two consecutive instances can be configured by radio resource control (RRC) signaling.

[0276] Example 11 is the apparatus of Example 9, wherein the number of instances of aperiodic channel state information reference signal (CSI-RS) resources and the interval between two consecutive instances can be configured by downlink control information (DCI).

[0277] Example 12 is the apparatus of Example 9, wherein aperiodic channel state information CSI resource sets having channel state information reference signal CSI-RS resources from the same port(s) with an interval between two consecutive channel state information reference signal CSI-RS resources are triggered by downlink control information DCI.

[0278] Example 13 is the apparatus of Example 12, wherein whether the channel state information reference signal (CSI-RS) resources of an aperiodic resource set are from the same port(s) is configured by radio resource control (RRC) signaling.

[0279] Example 14 is the apparatus of example 12, wherein the spacing between the two consecutive channel state information reference signal (CSI-RS) resources of an aperiodic resource set is configured by radio resource control (RRC) signaling.

[0280] Example 15 is the apparatus of example 1, wherein the base station BS is further configured to decode the layer indicator LI and the channel quality indicator CQI corresponding to one channel measurement resource CMR instance.

[0281] Example 16 is the apparatus of example 15, wherein the channel measurement resource CMR index can be the first or last channel measurement resource CMR index.

[0282] Example 17 is the apparatus of example 15, wherein the channel measurement resource CMR index can be configured by radio resource control (RRC) signaling. Example 18 is the apparatus of example 15, wherein the base station BS is enabled to decode the channel measurement resource CMR index of the channel state information CSI report.

[0283] Example 19 is the apparatus of example 1, wherein the base station BS is capable of decoding the plurality of layer indicators LI and channel quality indicators CQI corresponding to a plurality of channel measurement resource CMR instances of the channel state information CSI report.

[0284] Example 20 is the apparatus of example 19, wherein the base station BS is capable of identifying the layer indicator LI and the channel quality indicator CQI corresponding to each channel measurement resource CMR instance.

[0285] Example 21 is the apparatus of example 19, wherein the base station BS is capable of identifying a plurality of the layer indicators LI and channel quality indicators CQI corresponding to channel measurement resource CMR instances having the highest or lowest energy among the channel measurement resource CMR instances.

Claims

1. 1. A method of wireless communication by a user equipment (UE) device, the method comprising: 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); performing, by said user equipment (UE) device, measurements of at least one said channel measurement resource (CMR) at a plurality of time instances according to said configuration message; sending said channel state information (CSI) report to said network entity based on measurements of at least one said channel measurement resource (CMR) at a plurality of said time instances; The method comprises:

2. performing measurements of at least one said channel measurement resource CMR, performing, by the user equipment (UE) device, measurements of a plurality of channel measurement resources (CMRs) comprising at least one channel measurement resource (CMR) and at least one interference measurement resource (IMR) at a plurality of said time instances to generate said channel state information (CSI) report. The method of claim 1.

3. The method further comprises transmitting an indication of aperiodic channel state information reference signal (CSI-RS) based channel state information (CSI) reporting capability to the network entity.

3. The method according to claim 1 or 2.

4. The step of receiving the configuration message includes: receiving the configuration message from the network entity, the configuration message configuring a number of channel measurement resource (CMR) instances for layer indicator (LI) or channel quality indicator (CQI) reporting. The method according to any one of claims 1 to 3.

5. The method further comprises generating the channel state information (CSI) report in a single report reflecting time domain variations of a plurality of the channel measurement resources (CMRs) when the speed of the user equipment (UE) device exceeds a threshold speed; transmitting the channel state information CSI report comprises transmitting the single report of the channel state information CSI report to the network entity. The method according to any one of claims 2 to 3.

6. The method further comprises sending an indication of capability to report the channel state information (CSI) report to the network entity; The indication may be a maximum number of instances of channel state information reference signal (CSI-RS) resources that the user equipment (UE) device can measure for the channel state information (CSI) report; the number of channel state information CSI processing units (CPUs) occupied by the channel state information reference signal CSI-RS having multiple instances; An upper limit on the number of information elements (IEs) in the channel state information (CSI) reporting configuration; a minimum processing delay defined by parameters Z and Z′ for the channel state information CSI report, or Whether to support channel state information (CSI) prediction based on virtual channel measurement resource (CMR) instances; At least one of The method of claim 1.

7. The indication of the capability of reporting the channel state information (CSI) report may further comprise: an indication that the user equipment (UE) device supports the channel state information (CSI) prediction based on the virtual channel measurement resource (CMR) instance; The method of claim 6.

8. The step of receiving the configuration message includes: receiving a configuration message from the network entity, the configuration message configuring the channel state information (CSI) reporting to comprise the channel state information (CSI) prediction based on the virtual channel measurement resource (CMR) instance. The method of claim 7.

9. The configuration message includes: the user equipment UE device reports a channel quality indicator CQI from one channel measurement resource CMR instance, or Whether reporting from multiple channel measurement resource CMR instances, It has an indication of The method of claim 6.

10. The method further comprises receiving, from the network entity, downlink control information (DCI) for triggering a set of channel state information reference signals (CSI-RS) having CSI-RS resources associated with a same configuration. The method of claim 1.

11. the same configuration comprises the same channel state information reference signal (CSI-RS) resource set associated with an aperiodic channel state information reference signal (CSI-RS) configuration. The method of claim 10.

12. The configuration message includes: the number of instances of channel state information reference signals (CSI-RS) to be used in the channel state information (CSI) report; the number of time domain bases, a scheme for measuring channel state information (CSI), or Codebook configuration, At least one of The method of claim 1.

13. The scheme for channel state information CSI measurement comprises: a plurality of virtual channel measurement resources (CMR) measured before a minimum processing delay for the channel state information (CSI) report; a plurality of actual channel measurement resources CMR; It has a scheme based on The method of claim 12.

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

15. The step of transmitting the configuration message includes: sending the configuration message to the user equipment (UE) device, the configuration message configuring a number of channel measurement resource (CMR) instances for layer indicator (LI) or channel quality indicator (CQI) reporting.

15. The method of claim 14.

16. The method further comprises receiving an indication from the user equipment (UE) device of a capability to report the channel state information (CSI) report; The indication may be a maximum number of instances of channel state information reference signal (CSI-RS) resources that the user equipment (UE) device can measure for the channel state information (CSI) report; the number of channel state information CSI processing units (CPUs) occupied by the channel state information reference signal CSI-RS having multiple instances; An upper limit on the number of information elements (IEs) in the channel state information (CSI) reporting configuration; a minimum processing delay defined by parameters Z and Z′ for the channel state information CSI report, or Whether to support channel state information (CSI) prediction based on virtual channel measurement resource (CMR) instances; At least one of 15. The method of claim 14.

17. The indication of the capability of reporting the channel state information (CSI) report may further comprise: an indication that the user equipment (UE) device supports the channel state information (CSI) prediction based on the virtual channel measurement resource (CMR) instance; 17. The method of claim 16.

18. The step of transmitting the configuration message includes: sending a configuration message to the user equipment (UE) device, the configuration message configuring the channel state information (CSI) reporting to comprise the channel state information (CSI) prediction based on the virtual channel measurement resource (CMR) instance.

18. The method of claim 17.

19. the configuration message comprises an indication of whether the user equipment (UE) device reports a channel quality indicator (CQI) from one channel measurement resource (CMR) instance or from multiple channel measurement resource (CMR) instances based on the capabilities.

17. The method of claim 16.

20. The method further comprises transmitting, to the user equipment (UE) device, downlink control information (DCI) for triggering a set of channel state information reference signals (CSI-RS) having CSI-RS resources associated with a same configuration.

15. The method of claim 14.

21. the same configuration comprises the same channel state information reference signal (CSI-RS) resource set associated with an aperiodic channel state information reference signal (CSI-RS) configuration.

21. The method of claim 20.

22. The configuration message includes: the number of instances of channel state information reference signals (CSI-RS) to be used in the channel state information (CSI) report; the number of time domain bases, a scheme for measuring channel state information (CSI), or Codebook configuration, At least one of 15. The method of claim 14.

23. 1. An apparatus, comprising: one or more radio frequency RF modems; a processor coupled to one or more of said radio frequency RF modems; at least one memory storing executable instructions; It is equipped with The executable instructions operate the processor or at least one of the one or more radio frequency RF modems to perform a method according to any one of claims 1 to 22. Device.

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