Csi feedback for non-coherent joint transmission

Abstract

Systems and methods for channel state information (CSI) feedback for non-coherent joint transmission (NC-JT) are disclosed herein. In one embodiment, a method performed by a wireless communication device includes receiving a CSI reporting configuration including: a first group of non-zero power CSI reference signal (NZP CSI-RS) resources for channel measurement, and a second group of NZP CSI-RS resources for channel measurement; or a list of NZP CSI-RS resource tuples, each NZP CSI-RS resource tuple including one or more NZP CSI-RS resources for channel measurement. The method further includes selecting a first NZP CSI-RS resource and / or a second NZP CSI-RS resource in the first group of NZP CSI-RS resources and / or the second group of NZP CSI-RS resources, respectively, or in a NZP CSI-RS resource tuple of the list of NZP CSI-RS resource tuples. The method further includes reporting, to a network node, CSI based on the first NZP CSI-RS resource and / or the second NZP CSI-RS resource.

Description

[0001] Related applications

[0002] This application claims the benefit of provisional patent application No. 62 / 975,839, filed on February 13, 2020, the disclosure of which is hereby incorporated herein by reference in its entirety. Technical Field

[0003] This disclosure relates to Channel State Information (CSI) reporting in wireless networks. Background Technology

[0004] The next generation of mobile wireless communication systems (5G), or New Radio (NR), will support a range of different use cases and a range of different deployment scenarios. The latter includes deployments at low frequencies (below 6 GHz) and very high frequencies (up to tens of GHz).

[0005] As in Long Term Evolution (LTE), NR uses Cyclic Prefix Orthogonal Frequency Division Multiplexing (CP-OFDM) in the downlink (i.e., from the network node, NR base station (gNB), evolved Node B (eNB), or base station to user equipment (UE)) and both CP-OFDM and Discrete Fourier Transform (DFT) Extended OFDM (DFT-S-OFDM) in the uplink (i.e., from the UE to the gNB). In the time domain, the NR downlink and uplink are organized into subframes of equal size, each 1 millisecond (ms). Subframes are further divided into multiple time slots of equal duration. The time slot length depends on the subcarrier spacing. For a subcarrier spacing of Δf = 15 kHz, there is only one time slot per subframe, and each time slot consists of fourteen (14) OFDM symbols.

[0006] Data scheduling in NR can be based on time slots, as in LTE. Figure 1 The example shown is an NR time-domain structure with a 15 kHz subcarrier spacing, which has 14 symbol slots, where the first two symbols contain the Physical Downlink Control Channel (PDCCH) and the remaining symbols contain the Physical Data Channel (PDCH) (which can be either the Physical Downlink Shared Channel (PDSCH) or the Physical Uplink Shared Channel (PUSCH)).

[0007] Different subcarrier spacing values ​​are supported in NR. The supported subcarrier spacing values ​​(also known as different parameter sets (numerology)) are determined by Δf = (15 × 2) α Given α = 0, 1, 2, 3, 4, Δf = 15kHz is the basic subcarrier spacing also used in LTE.

[0008] In the frequency domain, the system bandwidth is divided into resource blocks (RBs), each corresponding to twelve (12) consecutive subcarriers. RBs are numbered starting from 0 at one end of the system bandwidth. Figure 2 The diagram shows the basic NR physical time-frequency resource grid, with only one RB shown within a 14-symbol slot. One OFDM subcarrier during one OFDM symbol interval forms one resource element (RE).

[0009] Downlink (DL) transmission is dynamically scheduled. In each time slot, the gNB transmits downlink control information (DCI) on the PDCCH. This DCI specifies which UE the data will be transmitted to and on which RBs (RBs) within the current downlink time slot. In NR, the PDCCH is typically transmitted in the first one or two OFDM symbols of each time slot. UE data is then carried on the PDSCH for downlink transmission. The UE first detects and decodes the PDCCH, and if decoding is successful, the UE decodes the corresponding PDSCH based on the decoded DCI in the PDCCH.

[0010] The UE also uses the PDCCH to dynamically schedule uplink data transmission. Similar to the downlink, the UE first decodes the uplink permission in the PDCCH, and then transmits data through the PUSCH based on the control information (such as modulation order, decoding rate, uplink resource allocation, etc.) decoded in the uplink permission.

[0011] Beam management

[0012] At millimeter-wave (mmW) frequencies, the concept of beam mobility within and between transmit / receive points (TRPs) is already defined in NR. At these frequencies, where high-gain beamforming is used, each beam is optimal only within a small area, and the link budget deteriorates rapidly outside the optimal beam. Therefore, frequent and rapid beam switching may be required to maintain high performance. To support such beam switching, a beam indication framework is defined in NR. For example, for PDSCH transmission, the DCI includes a Transmission Configuration Indicator (TCI) field, which informs the UE which beam to use, allowing the UE to adjust its receive (Rx) beam accordingly. This is beneficial for simulating Rx beamforming scenarios, where the UE needs to determine and apply Rx beamforming weights before it can receive the PDSCH.

[0013] In the following text, the term "spatial filtering weight" or "spatial filtering configuration" is used to refer to the antenna weights applied to data / control transmission / reception at the transmitter (at the gNB for downlink, or at the UE for uplink) or receiver (at the UE for downlink, or at the gNB for uplink). The term is more general in the sense that different propagation environments result in different spatial filtering weights that match the transmission / reception of signals to the channel. Spatial filtering weights may not always produce beamforming in the strict sense.

[0014] Before data transmission, a training phase is required to determine the spatial filtering configurations for the gNB and UE. This is in Figure 3 As shown, and referred to as downlink (DL) beam management in NR. In NR, two types of reference signals (RS) are used for DL ​​beam management operations: Channel State Information RS (CSI-RS) and Synchronization Signal / Physical Broadcast Control Channel (SS / PBCH) block (or simply SSB). Figure 3 An example is shown where CSI-RS is used to find a suitable beam pair link (BPL), meaning that a suitable gNB transmit spatial filtering configuration (gNB transmit (Tx) beam) plus a suitable UE receive spatial filtering configuration (UE Rx beam) produces a sufficiently good link budget.

[0015] Figure 3 This illustrates the beam training phase following the data transmission phase. Figure 3In the example, during a gNB Tx beam scan, the gNB configures the UE to measure on a set of five CSI-RS resources (RS1...RS5), which are transmitted using five different spatial filtering configurations (Tx beams). The UE is also configured to report the RS ID and RSRP of the CSI-RS corresponding to the maximum measured reference signal received power (RSRP). In this example, the maximum measured RSRP corresponds to RS4. This allows the gNB to understand from the UE's perspective what the preferred Tx beam is. In a subsequent UE Rx beam scan, the gNB transmits multiple CSI-RS resources in different OFDM symbols, all of which have the same spatial filtering configuration (Tx beam) as previously used to transmit RS4. The UE then tests different Rx spatial filtering configurations (Rx beams) in each OFDM symbol to maximize the received RSRP. The UE remembers the RS ID (RS ID 4 in this example) and the corresponding spatial filtering configuration that results in the maximum RSRP. When DL data is scheduled to the UE, the network can refer to this RS ID, thereby allowing the UE to adjust its Rx spatial filtering configuration (Rx beam) to receive PDSCH. As mentioned above, the RS ID is included in the TCI carried in the DCI field of the scheduled PDSCH.

[0016] For downlink data / control transmissions, the gNB indicates to the UE that the PDCCH / PDSCH demodulation reference signal (DMRS) and RS4 (in the example above, RS4 is the RS on which the UE performs measurements during beam scanning during the beam training phase) are spatially quasi-cooperatively positioned (QCL). At least for uplink control channel transmissions, the gNB indicates to the UE that RS4 is a reference signal for the spatial relationship of the PUCCH.

[0017] DL CSI Feedback

[0018] For DL ​​CSI feedback, NR has adopted an implicit CSI mechanism, in which the UE feeds back downlink CSI, which typically includes the Transmission Rank Indicator (RI), Precoder Matrix Indicator (PMI), and Channel Quality Indicator (CQI) for each codeword. Based on the CSI report configuration, the CQI / RI / PMI report can be wideband or subband.

[0019] RI corresponds to the recommended number of layers that will be spatially multiplexed and therefore transmitted in parallel in the downlink. PMI identifies the recommended precoding matrix for precoding one or more layers of PDSCH signals on multiple antenna ports characterized by non-zero power (NZP) CSI-RS resources. CQI represents the recommended modulation level (i.e., Quadrature Phase Shift Keying (QPSK), 16 Quadrature Amplitude Modulation (16QAM), etc.) and coding rate for each codeword. NR supports transmitting one or two codewords to the UE in a time slot.

[0020] CSI-RS

[0021] For CSI measurement and feedback, a CSI-RS is defined. The CSI-RS is transmitted on each transmit antenna (or antenna port) and used by the UE to measure the downlink channel between each of its transmit antenna ports and each of its receive antennas. Antenna ports are also referred to as CSI-RS ports. The number of antenna ports supported in NR is {1, 2, 4, 8, 12, 16, 24, 32}. By measuring the received CSI-RS, the UE can estimate the downlink channel that the CSI-RS is traversing, including the radio propagation channel and antenna gain. The CSI-RS used for the above purposes is also referred to as NZP CSI-RS.

[0022] NZP CSI-RS can be configured to be transmitted in certain REs and in certain time slots. Figure 4 An example of a CSI-RS RE with twelve (12) antenna ports is shown, where one RE is shown per port per RB.

[0023] Furthermore, NR defines a CSI Interference Measurement (CSI-IM) resource for UEs to measure interference. A CSI-IM resource comprises four REs, which can be four adjacent REs in the same OFDM symbol in frequency, or a pairwise set of adjacent REs in both time and frequency for each RB in a time slot. By measuring downlink channel based on both NZP CSI-RS and interference based on CSI-IM, the UE can estimate the effective channel and noise plus interference to determine CSI, i.e., rank, precoding matrix, and channel quality.

[0024] CSI framework in NR

[0025] In NR, a UE can be configured with multiple CSI reporting settings and multiple CSI resource settings. Each CSI reporting setting is represented by a higher-layer parameter CSI-ReportConfig with an associated identifier ReportConfigID, and each CSI resource setting is represented by a higher-layer parameter CSI-ResourceConfig with an associated identifier CSI-ResourceConfigId. Each CSI resource setting can contain one or more CSI resource sets. Each CSI resource set is represented by a higher-layer parameter NZP-CSI-RS-ResourceSet with an associated identifier NZP-CSI-RS-ResourceSetId for channel measurements, or by a higher-layer parameter CSI-IM-ResourceSet with an associated identifier CSI-IM-ResourceSetId for interference measurements. Each NZP CSI-RS resource set used for channel measurements can contain up to eight NZP CSI-RS resources. For each CSI report setting, depending on the configured number of reports, the UE feeds back a set of CSIs, which may include one or more of the following per codeword: CSI-RS Resource Indicator (CRI), RI, PMI, and CQI.

[0026] Each CSI-ReportConfig setting is associated with a single downlink bandwidth portion (BWP) (indicated by the higher-layer parameter BWP-Id) given in the associated CSI-ResourceConfig used for channel measurements, and contains one or more parameters for a CSI reporting band. Each CSI reporting setting may contain the following information:

[0027] • CSI resource settings for channel measurements based on NZP CSI-RS resources (represented by the higher-layer parameter resourcesForChannelMeasurement).

[0028] • CSI resource settings for interference measurements based on CSI-IM resources (represented by the higher-level parameter csi-IM-ResourcesForInterference).

[0029] • Optionally, the CSI resource settings for interference measurements based on NZP CSI-RS resources (represented by the higher-level parameter nzp-CSI-RS-ResourcesForInterference)

[0030] • Time-domain behavior, i.e., periodic, semi-persistent, or non-periodic reporting (represented by the higher-level parameter reportConfigType).

[0031] • Frequency granularity, i.e., broadband or sub-band.

[0032] • CSI parameters to be reported, such as RI, PMI, CQI, L1-RSRP / L1_SINR, and CRI in the case of multiple NZP CSI-RS resources in the resource set used for channel measurements (represented by the higher-level parameter reportQuantity, such as 'cri-RI-PMI-CQI', 'cri-RSRP', or 'ssb-Index-RSRP').

[0033] • Codebook type, i.e., type I or II (if reported), and codebook subset constraints.

[0034] • Measurement constraints.

[0035] For periodic and semi-static CSI reporting, only one NZP CSI-RS resource set can be configured for channel measurements, and only one CSI-IM resource set can be configured for interference measurements. For aperiodic CSI reporting, the CSI resource settings for channel measurements can contain more than one NZP CSI-RS resource setting for channel measurements. If the CSI resource settings for channel measurements contain multiple NZP CSI-RS resource sets for aperiodic CSI reporting, only one NZP CSI-RS resource set can be selected and indicated to the UE. For aperiodic CSI reporting, the trigger state list is given by the higher-layer parameter CSI-AperiodicTriggerStateList. Each trigger state in CSI-AperiodicTriggerStateList contains a list of associated CSI-ReportConfigs, each CSI-ReportConfig indicating the resource set ID for the channel and optionally indicating the resource set ID for interference. For a UE configured with the higher-level parameter CSI-AperiodicTriggerStateList, if the resource setting linked to CSI-ReportConfig has multiple aperiodic NZP CSI-RS resource sets, only one of the aperiodic NZP CSI-RS resource sets from that resource setting is associated with the trigger state, and the UE is a higher-level UE configured to select one NZP CSI-RS resource set from that resource setting per resource setting per trigger state.

[0036] When more than one NZP CSI-RS resource is included in the selected NZP CSI-RS resource set used for channel measurements, the UE reports a CRI to indicate to the gNB one of the selected NZP CSI-RS resources in the resource set, along with the RI, PMI, and CQI associated with the selected NZP CSI-RS resource. This type of CSI assumes that the PDSCH is transmitted from a single TRP, and the CSI is also referred to as a single TRP CSI.

[0037] Data transmission across multiple TRPs or panels

[0038] PDSCH can be transmitted to the UE from multiple TRPs. Since different TRPs may be located in different physical locations and have different beams, the propagation channels may differ. To facilitate PDSCH data reception from different TRPs or beams, the UE can be configured with multiple TCI states via Radio Resource Control (RRC). TCI states contain Quasi-Co-location (QCL) information between the DMRS used for PDSCH and one or two DL reference signals (such as NZP CSI-RS or SSB). Different NZP CSI-RS or SSBs can be associated with different TRPs or beams. The UE can use the QCL information to apply large-scale channel attributes associated with the DL reference signal (NZP CSI-RS or SSB) to the DMRS of the PDSCH for channel estimation and PDSCH reception.

[0039] The QCL information types supported in NR are:

[0040] • 'QCL-TypeA': {Doppler frequency shift, Doppler spread, average delay, delay spread}

[0041] • 'QCL-TypeA': {Doppler frequency shift, Doppler spread}

[0042] • 'QCL-TypeC': {Doppler shift, average delay}

[0043] • 'QCL-TypeD': {space Rx parameter}

[0044] A subset of TCI states configured in the RRC can be activated by the Media Access Control (MAC) Unit (CE) of the PDSCH. Furthermore, the MAC CE provides a mapping between TCI code points and TCI state subsets in the DCI. TCI code points can be mapped to one or two TCI states. Therefore, one or two TCI states can be dynamically selected and indicated in the DCI that schedules the PDSCH, depending on which TRP(s) or beam(s) the PDSCH will be transmitted on. Each code point in the TCI field of the DCI can indicate one or two TCI states. A TCI field code point indicating one TCI state can be used to transmit the PDSCH from a single TRP or a single beam. If a TCI field code point indicates two TCI states, the PDSCH can be transmitted from two TRPs or two beams.

[0045] Non-coherent joint transport (NC-JT)

[0046] NC-JT refers to Multiple-Input Multiple-Output (MIMO) data transmission over multiple Transmission Platforms (TRPs), where different MIMO layers transmit on different TRPs. Figure 5 An example is shown where the PDSCH is sent to the UE on two TRPs, each carrying one codeword. When the UE has four receive antennas and each TRP has only two transmit antennas, the UE can support up to four MIMO layers, but there are at most two MIMO layers from each TRP. In this case, by sending data to the UE on two TRPs, the peak data rate to the UE can be increased because up to four aggregation layers from the two TRPs can be used. This is beneficial when the traffic load in each TRP is low and therefore resource utilization is low. This scheme is also beneficial when the UE is in the line of sight (LOS) of both TRPs and the rank per TRP is limited, even if more transmit antennas are available at each TRP.

[0047] This type of NC-JT is supported by two TRPs in LTE, each with up to eight antenna ports. For CSI feedback purposes, the UE can be configured with a CSI procedure that has two NZP CSI-RS resources (one for each TRP) and one interference measurement resource. The UE can report one of the following scenarios:

[0048] 1. The UE reports CRI = 0, which indicates that CSI is calculated and reported only for the first NZP CSI-RS resource; that is, the RI, PMI, and CQI associated with the first NZP CSI-RS resource are reported. This is the case when the UE sees that optimal throughput has been achieved by transmitting PDSCH on the TRP or beam associated with the first NZP CSI-RS resource.

[0049] 2. The UE reports CRI = 1, which indicates that CSI is calculated and reported only for the second NZP CSI-RS resource; that is, the RI, PMI, and CQI associated with the second NZP CSI-RS resource are reported. This is the case when the UE sees that optimal throughput has been achieved by transmitting PDSCH on the TRP or beam associated with the second NZP CSI-RS resource.

[0050] 3. The UE reports CRI = 2, which indicates two NZP CSI-RS resources. In this case, based on the two NZP CSI-RS resources and by taking into account inter-codeword interference caused by another codeword, two sets of CSIs (one set per codeword) are calculated and reported. The combination of reported RIs is constrained such that |RI1 - RI2| <= 1, where RI1 and RI2 correspond to the ranks associated with the first NZP CSI-RS and the second NZP CSI-RS, respectively.

[0051] In NR version 16, a different approach was used, in which a single codeword was transmitted across two TRPs. Figure 6 The image shows an example of NC-JT supported in NR version 16, in which one layer is transferred from each of two TRPs. Summary of the Invention

[0052] This document discloses a system and method for channel state information (CSI) feedback in noncoherent joint transmission (NC-JT). In one embodiment, a method performed by a wireless communication device for reporting CSI in a wireless network includes receiving a CSI reporting configuration comprising: a first group of one or more non-zero power CSI reference signal (NZP CSI-RS) resources for channel measurements, and a second group of one or more NZP CSI-RS resources for channel measurements; or a list of NZP CSI-RS resource tuples, each NZP CSI-RS resource tuple including one or more NZP CSI-RS resources for channel measurements. The method further includes selecting a first NZP CSI-RS resource and / or a second NZP CSI-RS resource from the first group and / or the second group of one or more NZP CSI-RS resources, or from the NZP CSI-RS resource tuples in the list of NZP CSI-RS resource tuples. The method further includes reporting information to network nodes, including CSI information based on the first NZP CSI-RS resource and / or the second NZP CSI-RS resource.

[0053] In one embodiment, the first group of one or more NZP CSI-RS resources and the second group of one or more NZPCSI-RS resources are associated with a first Transmit and Receive Point (TRP) and a second TRP, respectively.

[0054] In one embodiment, each NZP CSI-RS resource tuple in the list includes one NZP CSI-RS resource associated with a first TRP and another NZP CSI-RS resource associated with a second TRP.

[0055] In one embodiment, the reported information may also include an indication of the selected first NZP CSI-RS resource and / or second NZP CSI-RS resource.

[0056] In one embodiment, selecting the first NZP CSI-RS resource and / or the second NZP CSI-RS resource includes selecting both the first and second NZP CSI-RS resources, and the CSI is the CSI corresponding to the NC-JT associated with the first and second NZP CSI-RS resources. In another embodiment, the CSI is the CSI corresponding to the NC-JT associated with the NZP CSI-RS tuple. In yet another embodiment, selecting the first NZP CSI-RS resource and / or the second NZP CSI-RS resource includes selecting either the first or second NZP CSI-RS resource, and the CSI is the CSI corresponding to the selected first or second NZP CSI-RS resource. In yet another embodiment, the CSI is the Reference Signal Received Power (RSRP) associated with each of the selected first and / or second NZP CSI-RS resources. In another embodiment, the CSI is the signal-to-interference-noise ratio (SINR) associated with each of the selected first NZP CSI-RS resources and / or second NZP CSI-RS resources.

[0057] In one embodiment, the first group of one or more NZP CSI-RS resources and the second group of one or more NZP CSI-RS resources correspond to a first NZP CSI-RS resource set and a second NZP CSI-RS resource set, respectively. In one embodiment, the first NZP CSI-RS resource set and the second NZP CSI-RS resource set are configured in two CSI resource settings included in the CSI report configuration. In one embodiment, the wireless network is a New Radio (NR) network, and the CSI report configuration is a CSI-ReportConfig, which is extended to include two resourcesForChannelMeasurment instances pointing to the first NZP CSI-RS resource set and the second NZP CSI-RS resource set, respectively. In one embodiment, the wireless network is a New Radio (NR) network, the CSI report configuration is CSI-ReportConfig, the first of the two CSI resource settings is a first resourcesForChannelMeasurment included in the CSI-ReportConfig that points to the first NZP CSI-RS resource set, and the second of the two CSI resource settings is a second resourcesForChannelMeasurment included in the CSI-ReportConfig that points to the second NZP CSI-RS resource set. In another embodiment, the wireless network is an NR network, the report is a non-periodic triggered CSI report, and the first and second NZP CSI-RS resource sets are indicated in each CSI-AssociatedReportConfigInfo element within the CSI-AperiodicTriggerStateList information element. In yet another embodiment, the first and second NZP CSI-RS resource sets are included in a single CSI resource setting, which is also included in the CSI report configuration. In one embodiment, the first NZP CSI-RS resource set and the second NZP CSI-RS resource set included in the single CSI resource setting are configured in an aperiodic CSI trigger state associated with the CSI reporting configuration. In one embodiment, the aperiodic CSI trigger state further includes a first quasi-cooperative positioning (QCL) indication and a second QCL indication, respectively, for the first NZP CSI-RS resource set and the second NZP CSI-RS resource set.

[0058] In one embodiment, the first group of one or more NZP CSI-RS resources and the second group of one or more NZP CSI-RS resources are included in a single NZP CSI-RS resource set. In one embodiment, each NZP CSI-RS resource in the first group and the second group is associated with an index indicating whether the NZP CSI-RS resource is in the first group or the second group. In one embodiment, the first group of one or more NZP CSI-RS resources or the second group of one or more NZP CSI-RS resources is identified by an index included in each NZP CSI-RS resource configuration. In one embodiment, the index is one of the following: an index of a Transport Configuration Indicator (TCI), a control resource pool index, or a new group index.

[0059] In one embodiment, the list of NZP CSI-RS resource tuples is included in a single NZP CSI-RS resource set.

[0060] In one embodiment, selecting the first NZP CSI-resource and / or the second NZP CSI-RS resource includes selecting the first NZP CSI-resource and / or the second NZP CSI-RS resource based on a predetermined metric. In one embodiment, the metric is downlink throughput.

[0061] In one embodiment, the CSI based on the selected first NZP CSI-RS resource and / or the second NZP CSI-RS resource includes: (a) the rank indicator (RI) for each selected NZP CSI-RS resource, (b) the precoding matrix indicator (PMI) for each selected NZP CSI-RS resource, (c) the channel quality indicator (CQI) for each selected NZP CSI-RS resource, (d) the joint CQI of a pair of selected NZP CSI-RS resources, (e) the layer-1 reference signal received power (L1-RSRP) for each selected NZP CSI-RS resource, (f) the layer-1 signal-to-interference-plus-noise ratio (L1-SINR) for each selected NZP CSI-RS resource, (g) the NZP CSI-RS resource indicator (CRI) for each selected NZP CSI-RS resource, (h) the NZP CSI-RS resource group indicator (CRGI) for each selected NZP CSI-RS resource, and (i) the NZP of the selected NZP CSI-RS tuple. CSI-RS tuple indicator, or any combination of two or more of (j)(a) to (i).

[0062] In one embodiment, selecting the first NZP CSI-RS resource and / or the second NZP CSI-RS resource includes selecting the first NZP CSI-RS resource and the second NZP CSI-RS resource, and the CSI based on the selected first NZP CSI-RS resource and the second NZP CSI-RS resource includes a first NZP CSI-RS resource indicator (CRI1) and a second NZP CSI-RS resource indicator (CRI2), and respectively associated with a first rank indicator (RI1) and a second rank indicator (RI2), a first precoding matrix indicator (PMI1) and a second precoding matrix indicator (PMI2), and a joint channel quality indicator (CQI).

[0063] In one embodiment, selecting the first NZP CSI-RS resource and / or the second NZP CSI-RS resource includes selecting the first NZP CSI-RS resource and the second NZP CSI-RS resource, and the CSI based on the selected first NZP CSI-RS resource and the second NZP CSI-RS resource includes a first NZP CSI-RS resource indicator (CRI1) and a second NZP CSI-RS resource indicator (CRI2), and respectively associated with a first rank indicator (RI1) and a second rank indicator (RI2), a first precoding matrix indicator (PMI1) and a second precoding matrix indicator (PMI2), and a first channel quality indicator (CQI) and a second channel quality indicator (CQI2).

[0064] In one embodiment, the CSI is calculated by assuming that noncoherent joint transmission (NC-JT) of the Physical Downlink Shared Channel (PDSCH) is performed on the antenna ports of the first NZP CSI-RS resource and the second NZP CSI-RS resource on the same time and frequency resources.

[0065] In one embodiment, selecting the first NZP CSI-RS resource and / or the second NZP CSI-RS resource includes selecting the first NZP CSI-RS resource and the second NZP CSI-RS resource, and the CSI based on the selected first NZP CSI-RS resource and the second NZP CSI-RS resource includes a first NZP CSI-RS resource indicator (CRI1) and a second NZP CSI-RS resource indicator (CRI2), as well as a first RSRP and a second RSRP or a first SINR and a second SINR respectively associated.

[0066] In one embodiment, CRI1, CRI2, and / or CRGI can be jointly encoded.

[0067] In one embodiment, the mapping between CRI and one or more NZP CSI-RS resources in the first group and the second group of NZP CSI-RS resources, or one or more NZP CSI-RS tuples in the list, can be configured explicitly or implicitly.

[0068] In one embodiment, the indication of one or more selected NZP CSI-RS resources includes RI = 0 for either the second NZP CSI-RS resource or the first NZP CSI-RS resource.

[0069] In one embodiment, the CSI report configuration also includes a codebook configuration.

[0070] In one embodiment, the CSI reporting configuration further includes a reporting volume indicator that indicates CSI reporting for NC-JT. In one embodiment, the reporting volume indicator may also indicate whether the CSI report includes a combined CQI or a pair of CQIs.

[0071] In one embodiment, the CSI reporting configuration also includes one or more CSI interference measurement (CSI-IM) resources.

[0072] A corresponding embodiment of the wireless communication device is also disclosed. In one embodiment, a wireless communication device for reporting CSI in a wireless network is adapted to receive a CSI reporting configuration, the CSI reporting configuration including: a first group of one or more NZP CSI-RS resources for channel measurement, and a second group of one or more NZP CSI-RS resources for channel measurement; or a list of NZP CSI-RS resource tuples, each NZP CSI-RS resource tuple including one or more NZP CSI-RS resources for channel measurement. The wireless communication device is further adapted to select a first NZP CSI-RS resource and / or a second NZP CSI-RS resource from the first group and / or the second group of one or more NZP CSI-RS resources, respectively, or from the NZP CSI-RS resource tuples in the list of NZP CSI-RS resource tuples. The wireless communication device is further adapted to report information to a network node including CSI based on the selected first NZP CSI-RS resource and / or the second NZP CSI-RS resource.

[0073] In one embodiment, a wireless communication device for reporting CSI in a wireless network includes one or more transmitters, one or more receivers, and processing circuitry associated with the one or more transmitters and the one or more receivers. The processing circuitry is configured to cause the wireless communication device to receive a CSI reporting configuration, the CSI reporting configuration including: a first group of one or more NZP CSI-RS resources for channel measurement, and a second group of one or more NZP CSI-RS resources for channel measurement; or a list of NZP CSI-RS resource tuples, each NZP CSI-RS resource tuple including one or more NZP CSI-RS resources for channel measurement. The processing circuitry is further configured to cause the wireless communication device to select a first NZP CSI-RS resource and / or a second NZP CSI-RS resource from the first group of one or more NZP CSI-RS resources and / or the second group of one or more NZP CSI-RS resources, or from the NZP CSI-RS resource tuples in the list of NZP CSI-RS resource tuples. The processing circuitry is also configured to cause the wireless communication device to report information to the network node, including CSI information based on a selected first NZP CSI-RS resource and / or a second NZP CSI-RS resource.

[0074] A method performed by a network node is also disclosed. In one embodiment, a method performed by a network node includes providing a CSI report configuration to a wireless communication device, the CSI report configuration including: a first group of one or more NZP CSI-RS resources for channel measurement, and a second group of one or more NZP CSI-RS resources for channel measurement; or a list of NZP CSI-RS resource tuples, each NZP CSI-RS resource tuple including one or more NZP CSI-RS resources for channel measurement. The method also includes receiving information from the wireless communication device including CSI based on the selected one or more NZP CSI-RS resources.

[0075] In one embodiment, the first group of one or more NZP CSI-RS resources and the second group of one or more NZPCSI-RS resources are associated with a first TRP and a second TRP, respectively.

[0076] In one embodiment, each NZP CSI-RS resource tuple in the list includes one NZP CSI-RS resource associated with a first TRP and another NZP CSI-RS resource associated with a second TRP.

[0077] In one embodiment, the reported information may also include an indication of the selected first NZP CSI-RS resource and / or second NZP CSI-RS resource.

[0078] In one embodiment, the selected one or more NZP CSI-RS resources include a first group of one or more NZP CSI-RS resources and a second group of one or more NZP CSI-RS resources, respectively, or a first NZP CSI-RS resource and a second NZP CSI-RS resource from an NZP CSI-RS resource tuple, wherein the NZP CSI-RS resource tuple is from the list of CSI-RS resource tuples, and the CSI is the CSI corresponding to the NC-JT associated with the first NZP CSI-RS resource and the second NZP CSI-RS resource. In another embodiment, the selected one or more NZP CSI-RS resources include a first NZP CSI-RS resource and a second NZP CSI-RS resource selected from the list of NZP CSI-RS resource tuples, and the CSI is the CSI corresponding to the NC-JT associated with the NZP CSI-RS tuple. In another embodiment, the selected one or more NZP CSI-RS resources include a first group of one or more NZP CSI-RS resources or a second group of one or more NZP CSI-RS resources, or a first or second NZP CSI-RS resource from an NZP CSI-RS resource tuple, wherein the NZP CSI-RS resource tuple is from the list of CSI-RS resource tuples, and the CSI is the CSI corresponding to the selected first or second NZP CSI-RS resource. In another embodiment, the CSI is the RSRP associated with each of the selected one or more NZP CSI-RS resources. In another embodiment, the CSI is the SINR associated with each of the selected one or more NZP CSI-RS resources.

[0079] In one embodiment, the first group of one or more NZP CSI-RS resources and the second group of one or more NZP CSI-RS resources are included in a single NZP CSI-RS resource set. In one embodiment, each NZP CSI-RS resource in the first group and the second group is associated with an index indicating whether the NZP CSI-RS resource is in the first group or the second group. In one embodiment, the first group of one or more NZP CSI-RS resources or the second group of one or more NZP CSI-RS resources is identified by an index included in each NZP CSI-RS resource configuration. In one embodiment, the index may be one of the following: a TCI index, a control resource pool index, or a new group index.

[0080] In one embodiment, the list of NZP CSI-RS resource tuples is included in a single NZP CSI-RS resource set.

[0081] In one embodiment, the CSI based on one or more selected NZP CSI-RS resources includes: (a) the RI of each selected NZP CSI-RS resource, (b) the PMI of each selected NZP CSI-RS resource, (c) the CQI of each selected NZP CSI-RS resource, (d) the joint CQI of a pair of selected NZP CSI-RS resources, (e) the L1-RSRP of each selected NZP CSI-RS resource, (f) the L1-SINR of each selected NZP CSI-RS resource, (g) the CRI of each selected NZP CSI-RS resource, (h) the CRGI of each selected NZP CSI-RS resource, (i) the NZP CSI-RS tuple indicator for each selected tuple of the NZP CSI-RS resource, or (j) any combination of two or more of (a) to (i).

[0082] In one embodiment, the selected one or more NZP CSI-RS resources include the first group and the second group of one or more NZP CSI-RS resources respectively, or the first and second NZP CSI-RS resources from the NZP CSI-RS resource tuple, the NZP CSI-RS resource tuple being from the list of CSI-RS resource tuples, and the CSI based on the selected first and second NZP CSI-RS resources includes a first NZP CSI-RS resource indicator (CRI1) and a second NZP CSI-RS resource indicator (CRI2), and respectively associated with a first rank indicator (RI1) and a second rank indicator (RI2), a first precoding matrix indicator (PMI1) and a second precoding matrix indicator (PMI2), and a joint channel quality indicator (CQI).

[0083] In one embodiment, the selected one or more NZP CSI-RS resources include the first group and the second group of one or more NZP CSI-RS resources respectively, or the first and second NZP CSI-RS resources from the NZP CSI-RS resource tuple, the NZP CSI-RS resource tuple being from the list of CSI-RS resource tuples, and the CSI based on the selected first and second NZP CSI-RS resources includes a first NZP CSI-RS resource indicator (CRI1) and a second NZP CSI-RS resource indicator (CRI2), and respectively associated with a first rank indicator (RI1) and a second rank indicator (RI2), a first precoding matrix indicator (PMI1) and a second precoding matrix indicator (PMI2), and a first channel quality indicator (CQI) and a second channel quality indicator (CQI2).

[0084] In one embodiment, the selected one or more NZP CSI-RS resources include the first group of one or more NZP CSI-RS resources and the second group of one or more NZP CSI-RS resources, or the first NZP CSI-RS resources and the second NZP CSI-RS resources from the NZP CSI-RS resource tuple, wherein the NZP CSI-RS resource tuple is from the list of CSI-RS resource tuples, and the CSI is calculated by assuming that noncoherent joint transmission NC-JT of Physical Downlink Shared Channel (PDSCH) is performed on the antenna ports of the first NZP CSI-RS resources and the second NZP CSI-RS resources on the same time and frequency resources.

[0085] In one embodiment, the selected one or more NZP CSI-RS resources include the first group and the second group of one or more NZP CSI-RS resources respectively, or the first and second NZP CSI-RS resources from the NZP CSI-RS resource tuple, the NZP CSI-RS resource tuple being from the list of CSI-RS resource tuples, and the CSI based on the selected first and second NZP CSI-RS resources includes a first NZP CSI-RS resource indicator (CRI1) and a second NZP CSI-RS resource indicator (CRI2), and respectively associated with a first RSRP and a second RSRP or a first SINR and a second SINR.

[0086] In one embodiment, CRI1, CRI2, and / or CRGI can be jointly encoded.

[0087] In one embodiment, the indication of one or more selected NZP CSI-RS resources includes RI = 0 for either the second NZP CSI-RS resource or the first NZP CSI-RS resource.

[0088] In one embodiment, the CSI report configuration also includes a codebook configuration.

[0089] In one embodiment, the CSI reporting configuration further includes a reporting volume indicator that indicates CSI reporting for NC-JT. In one embodiment, the reporting volume indicator may also indicate whether the CSI report includes a combined CQI or a pair of CQIs.

[0090] In one embodiment, the CSI reporting configuration also includes one or more CSI-IM resources.

[0091] Corresponding embodiments of the network node are also disclosed. In one embodiment, a network node is adapted to provide a CSI report configuration to a wireless communication device, the CSI report configuration including: a first group of one or more NZP CSI-RS resources for channel measurement, and a second group of one or more NZP CSI-RS resources for channel measurement; or a list of NZP CSI-RS resource tuples, each NZP CSI-RS resource tuple including one or more NZP CSI-RS resources for channel measurement. The network node is also adapted to receive information from the wireless communication device including CSI based on one or more selected NZP CSI-RS resources.

[0092] In one embodiment, a network node includes processing circuitry configured to provide a CSI report configuration to a wireless communication device. The CSI report configuration includes: a first group of one or more NZP CSI-RS resources for channel measurement, and a second group of one or more NZP CSI-RS resources for channel measurement; or a list of NZP CSI-RS resource tuples, each NZP CSI-RS resource tuple including one or more NZP CSI-RS resources for channel measurement. The processing circuitry is also configured to cause the network node to receive information from the wireless communication device including CSI based on one or more selected NZP CSI-RS resources. Attached Figure Description

[0093] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate several aspects of this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0094] Figure 1 An example of the new air interface (NR) time-domain structure is shown;

[0095] Figure 2 The basic NR time-frequency resource grid is shown;

[0096] Figure 3 This demonstrates NR downlink beam management;

[0097] Figure 4 An example of Channel State Information (CSI) Reference Signal (CSI-RS) Resource Elements (REs) for twelve (12) antenna ports is shown, where one RE is shown per port per RB;

[0098] Figure 5 An example of noncoherent joint transport (NC-JT) is shown, in which the physical downlink shared channel (PDSCH) is transmitted to the user equipment (UE) at two transport / receive points (TRPs), each carrying a codeword;

[0099] Figure 6 An example of NC-JT supported in NR version 16 is shown, in which one layer is transferred from each of two TRPs;

[0100] Figure 7 An example of a cellular communication system that can implement embodiments of the present disclosure is shown;

[0101] Figure 8 Examples of embodiments according to this disclosure are shown;

[0102] Figure 9 An example of CSI feedback based on two groups of NZP CSI-RS resources for channel measurement, according to an embodiment of this disclosure, is shown;

[0103] Figure 10 An example of two-part CSI encoding according to an embodiment of this disclosure is shown;

[0104] Figure 11 An example of UE receive (Rx) beam scanning is shown according to an embodiment of the present disclosure when identifying the optimal Rx beam for receiving signals from each TRP;

[0105] Figure 12 An example of two-part CSI encoding according to an embodiment of this disclosure is shown;

[0106] Figure 13 Examples of options for expanding a single NZP CSI-RS resource set configured in CSI-ResourceConfig are shown according to embodiments of the present disclosure;

[0107] Figure 14 Operation of a wireless communication device (e.g., UE) and a network node (e.g., a radio access node, such as a base station (e.g., gNB)) according to at least some embodiments of the present disclosure is illustrated.

[0108] Figure 14B Operation of a wireless communication device (e.g., UE) and a network node (e.g., a radio access node, such as a base station (e.g., gNB)) according to some other embodiments of this disclosure is illustrated;

[0109] Figures 15 to 17 This is a schematic block diagram of a radio access node according to some example embodiments of the present disclosure;

[0110] Figure 18 and Figure 19 These are schematic block diagrams of wireless communication devices or UEs according to some example embodiments of this disclosure;

[0111] Figure 20 Example embodiments of a communication system that can implement the embodiments of this disclosure are shown;

[0112] Figure 21 It shows Figure 20 Example embodiments of the host computer, base station, and UE; and

[0113] Figures 22 to 25 This is shown in communication systems (such as...) Figure 20 A flowchart of an example embodiment of a method implemented in a communication system. Detailed Implementation

[0114] Some embodiments contemplated herein will now be described more fully with reference to the accompanying drawings. However, other embodiments are included within the scope of the subject matter disclosed herein, and the disclosed subject matter should not be construed as being limited to the embodiments set forth herein; rather, these embodiments are provided by way of example to convey the scope of the subject matter to those skilled in the art.

[0115] The embodiments described below illustrate information to enable those skilled in the art to practice the embodiments and demonstrate the best mode for practicing the embodiments. When reading the following description in conjunction with the accompanying drawings, those skilled in the art will understand the concepts of this disclosure and will recognize the application of these concepts, which are not specifically addressed herein. It should be understood that these concepts and applications fall within the scope of this disclosure.

[0116] Generally, all terms used herein will be interpreted according to their ordinary meaning in the relevant art, unless a different meaning is clearly given and / or implied from the context of their use. Unless otherwise expressly stated, all references to elements, devices, components, parts, steps, etc., should be openly interpreted as referring to at least one instance of said element, device, component, part, step, etc. The steps of any method disclosed herein are not necessarily performed in the exact order disclosed, unless the steps are explicitly described as occurring after or before another step and / or where it is implied that a step must occur after or before another step. Where appropriate, any feature of any embodiment disclosed herein may be applied to any other embodiment. Similarly, any advantage of any embodiment may be applied to any other embodiment, and vice versa. Further objects, features, and advantages of the appended embodiments will become apparent from the following description.

[0117] Radio node: As used herein, a “radio node” is a radio access node or wireless communication device.

[0118] Radio Access Node: As used herein, a “radio access node” or “radio network node” or “radio access network node” is any node in the radio access network (RAN) of a cellular communication network that operates to wirelessly transmit and / or receive signals. Some examples of radio access nodes include, but are not limited to, base stations (e.g., NR base stations (gNBs) in 3GPP 5G New Radio (NR) networks or enhanced or evolved Node Bs (eNBs) in 3GPP Long Term Evolution (LTE) networks), high-power or macro base stations, low-power base stations (e.g., micro base stations, pico base stations, home eNBs, or the like), relay nodes, network nodes that implement partial functionality of base stations (e.g., network nodes that implement gNB central units (gNB-CUs) or gNB distributed units (gNB-DUs), or network nodes that implement partial functionality of some other type of radio access node.

[0119] Core Network Node: As used herein, a “core network node” is any type of node in the core network or any node that implements core network functions. Some examples of core network nodes include, for example, a Mobility Management Entity (MME), a Packet Data Network Gateway (P-GW), a Service Capability Opening Function (SCEF), a Home Subscriber Server (HSS), etc. Other examples of core network nodes include nodes that implement Access and Mobility Functions (AMF), UPF, Session Management Functions (SMF), Authentication Server Functions (AUSF), Network Slice Selection Functions (NSSF), Network Opening Functions (NEF), Network Functions (NF) Storehouse Functions (NRF), Policy Control Functions (PCF), Unified Data Management (UDM), etc.

[0120] Communication device: As used herein, a “communication device” is any type of device authorized to access a network. Some examples of communication devices include, but are not limited to: mobile phones, smartphones, sensor devices, instruments, vehicles, household appliances, medical devices, media players, cameras, or any type of consumer electronics device (e.g., but not limited to, televisions, radios, lighting fixtures, tablets, laptops, or personal computers (PCs)). A communication device can be a portable, handheld, computer-integrated, or vehicle-mounted mobile device enabled to transmit voice and / or data via a wireless or wired connection.

[0121] Wireless communication device: One type of communication device is a wireless communication device, which can be any type of wireless device authorized to access a wireless network (e.g., a cellular network) (i.e., served by it). Some examples of wireless communication devices include, but are not limited to: User Equipment (UE) devices in 3GPP networks, Machine-Type Communication (MTC) devices, and Internet of Things (IoT) devices. Such wireless communication devices can be, or can be integrated into, mobile phones, smartphones, sensor devices, instruments, vehicles, home appliances, medical devices, media players, cameras, or any type of consumer electronics device (e.g., but not limited to, televisions, radio devices, lighting devices, tablet computers, laptop computers, or PCs). Wireless communication devices can be portable, handheld, computer-integrated, or vehicle-mounted mobile devices enabled to transmit voice and / or data via a wireless connection.

[0122] Network node: As used in this article, a “network node” is any node that is part of the core network or radio access network of a cellular communication network / system.

[0123] Transmit / Receive Point (TRP): As used herein, a TRP is part of a base station (e.g., gNB) that transmits and receives radio signals to / from a wireless communication device (e.g., UE) based on physical layer attributes and parameters inherent to the element.

[0124] Note that the descriptions presented herein focus on 3GPP cellular communication systems, and thus, 3GPP terminology or similar terminology is frequently used. However, the concepts disclosed herein are not limited to 3GPP systems.

[0125] Note that the term “cell” may be referenced in the description herein; however, in particular with respect to the 5G NR concept, beams may be used instead of cells, and therefore it is important to note that the concepts described herein are equally applicable to both cells and beams.

[0126] There are currently some challenges. LTE-like CSI feedback for noncoherent joint transport (NC-JT) has the following limitations:

[0127] It assumes that one codeword is transmitted from each TRP, whereas in NR, one codeword can be transmitted from two TRPs.

[0128] It is applicable to the low carrier frequency range (FR1), where a single NZP CSI-RS resource is typically associated with one TRP. On the other hand, in the high carrier frequency (FR2) NR, multiple beams can be formed from each TRP, and therefore multiple NZP CSI-RS resources can be configured for each TRP. To use CSI feedback similar to LTE, the gNB needs to first determine one beam from each TRP and then request CSI feedback with two NZP CSI-RS resources for channel measurement. Therefore, an additional step is required, which leads to the following problems:

[0129] Using LTE-like NC-JT CSI feedback in NR would mean more delay in obtaining NC-JT CSI feedback in NR.

[0130] The additional steps required to determine a beam from each TRP will mean additional overhead in the downlink (i.e., downlink control overhead involved in the additional steps) and additional overhead in the uplink (i.e., uplink control overhead involved in the additional steps).

[0131] Certain aspects of this disclosure and its embodiments may provide solutions to the foregoing or other challenges. In one aspect, a method is proposed such that a UE can be configured to report CSI, wherein channel measurements are based on more than one NZP CSI-RS resource. This configuration may be based on two groups of NZP CSI-RS resources, each group containing more than one NZP CSI-RS resource for channel measurements, and each group may be associated with a TRP. Note that it is also possible that each group is associated with a different panel of a TRP. In one embodiment, the UE selects one NZP CSI-RS resource or two NZP CSI-RS resources (one per group) based on the maximum achievable UE throughput and reports CSI accordingly. When an NZP CSI-RS resource is selected, the CSI associated with that resource is reported along with a CRI indicating the selected resource. If two resources are selected, the CRI, a pair of RIs, and a pair of PMIs are reported along with a joint CQI conditioned on the pair of RIs and the pair of PMIs. The reported CRI indicates the two selected NZP CSI-RS resources. A bit is used to indicate whether one or two resources are selected. Note that the CRI in the report is optional, and may not be required if the method is used for UE receive (RX) beam scanning. The UE can also be explicitly configured with multiple NZP-CSI-RS resource sets, in which case the UE estimates the CSI generated by simultaneously receiving all NZP CSI-RS resources in each set. The UE will report the CRI corresponding to the NZP-CSI-RS resource set number, along with a PMI, RI, and a joint CQI for each NZP CSI-RS resource in the reported set.

[0132] This document presents various embodiments for solving one or more of the problems disclosed herein. Some example embodiments of this disclosure are as follows.

[0133] Example 1: A method for reporting CSI in a wireless network, performed by a wireless device, the method comprising:

[0134] • Receive CSI report configuration, which includes a first group and a second group of one or more NZP CSI-RS resources for channel measurements; and

[0135] • Choose one of the following options:

[0136] i. The first NZP CSI-RS resource in the first group;

[0137] ii. The second NZP CSI-RS resource in the second group; and

[0138] iii. The first NZP CSI-RS resource in the first group and the second NZP CSI-RS resource in the second group; and

[0139] • The report is based on one of the following CSIs: the first NZP CSI-RS resource, the second NZP CSI-RS resource, and both the first NZP CSI-RS resource and the second NZP CSI-RS resource, as well as the indication of the first NZP CSI-RS resource and / or the second NZP CSI-RS resource.

[0140] Example 2: According to the method described in Example 1, the first group of NZP CSI-RS resources and the second group of NZP CSI-RS resources correspond to the first NZP CSI-RS resource set and the second NZP CSI-RS resource set, respectively.

[0141] Example 3: According to the method described in Examples 1 and 2, the first NZP CSI-RS resource set and the second NZP CSI-RS resource set are configured in the two CSI resource settings included in the CSI report configuration.

[0142] Example 4: According to the method described in Examples 1 and 2, the first NZP CSI-RS resource set and the second NZP CSI-RS resource set are included in a single CSI resource setting, which is included in the CSI report configuration.

[0143] Example 5: According to the method described in Examples 1, 2 and 4, the first NZP CSI-RS resource set and the second NZP CSI-RS resource set included in the CSI resource settings are configured in a non-periodic CSI triggering state associated with the CSI report configuration.

[0144] Example 6: According to the method described in Example 5, the non-periodic CSI trigger state further includes a first quasi-cooperative positioning (QCL) indication and a second quasi-cooperative positioning (QCL) indication for the first NZP CSI-RS resource set and the second NZP CSI-RS resource set, respectively.

[0145] Example 7: According to the method described in Example 1, the first group of NZP CSI-RS resources and the second group of NZPCSI-RS resources are included in a single NZP CSI-RS resource set.

[0146] Example 8: According to the method described in Example 7, the first group of NZP CSI-RS resources or the second group of NZPCSI-RS resources is identified by an index included in each NZP CSI-RS resource configuration.

[0147] Example 9: According to the method described in Example 8, the index may be one of the following:

[0148] • Index of the Transport Configuration Indicator (TCI); or

[0149] • Control the resource pool index; or

[0150] • New group index.

[0151] Example 10: According to the method of Example 1, the determination can be based on the maximum downlink throughput that each option can provide to select one or more NZP CSI-RS resources.

[0152] Example 11: According to the method of Example 1, wherein the CSI based on the determined first NZP CSI-RS resource or the second NZP CSI-RS resource includes one or more of the following: Rank Indicator (RI), Precoding Matrix Indicator (PMI), Channel Quality Indicator (CQI), Layer 1 Received Reference Signal Power (L1-RSRP) or Layer 1 Signal-to-Interference-Noise Ratio (L1-SINR), NZP CSI-RS Resource Indicator (CRI), and NZP CSI-RS Resource Group Indicator (CRGI).

[0153] Example 12: According to the method described in Example 1, the CSI based on the determined first NZP CSI-RS resource and the second NZP CSI-RS resource includes a first NZP CSI-RS resource indicator (CRI1) and a second NZP CSI-RS resource indicator (CRI2), and respectively associated with a first rank indicator (RI1) and a second rank indicator (RI2), a first precoding matrix indicator (PMI1) and a second precoding matrix indicator (PMI2), and a joint channel quality indicator (CQI).

[0154] Example 13: According to the method described in Example 1, wherein the CSI based on the determined first NZP CSI-RS resource and the second NZP CSI-RS resource includes a first NZP CSI-RS resource indicator (CRI1) and a second NZP CSI-RS resource indicator (CRI2), and respectively associated with a first rank indicator (RI1) and a second rank indicator (RI2), a first precoding matrix indicator (PMI1) and a second precoding matrix indicator (PMI2), and a first channel quality indicator (CQI) and a second channel quality indicator (CQI2).

[0155] Example 14: The method described in Examples 12 to 13, wherein the CSI is calculated by assuming that noncoherent joint transmission (NC-JT) of the Physical Downlink Shared Channel (PDSCH) is performed on the antenna ports configured in both the first NZP CSI-RS resource and the second NZP CSI-RS resource on the same time and frequency resources.

[0156] Example 15: According to the method of Example 1, wherein the CSI based on the determined first NZP CSI-RS resource and the second NZP CSI-RS resource includes a first NZP CSI-RS resource indicator (CRI1) and a second NZP CSI-RS resource indicator (CRI2), and a first RSRP and a second RSRP or a first SINR and a second SINR respectively associated.

[0157] Example 16: The method described in Examples 11 to 15, wherein CRI1, CRI2, and / or CRGI can be jointly encoded.

[0158] Example 17: According to the method described in Examples 11 to 15, the determined first NZP CSI-RS resource (or second NZP CSI-RS resource) can be indicated by RI = 0 of the second NZP CSI-RS resource (or the first NZP CSI-RS resource).

[0159] Example 18: According to the method described in Example 1, the CSI report configuration further includes a codebook configuration.

[0160] Example 19: According to the method of Example 1, the CSI report configuration further includes a report volume indicator that indicates CSI reporting for NC-JT.

[0161] Example 20: The method according to Examples 1 to 18, wherein the report quantity indicator may also indicate whether the CSI report includes a combined CQI or a pair of CQIs.

[0162] Example 21: The method according to Examples 1 to 18, wherein the CSI report configuration further includes one or more CSI interference measurement (CSI-IM) resources.

[0163] Example 22: A method for reporting CSI in a wireless network, performed by a wireless device, the method comprising:

[0164] • Receive a configuration for an NZP CSI-RS resource set, the configuration containing a list of NZP CSI-RS resource tuples, each NZP CSI-RS resource tuple including one or more NZP CSI-RS resources; and

[0165] • Receive CSI report configuration including the NZP CSI-RS resource set for channel measurements; and

[0166] • Determine the NZP CSI-RS resource tuples from the list of NZP CSI-RS resource tuples; and

[0167] • The report is based on the CSI of the identified NZP CSI-RS resource tuple and the indications of the identified NZP CSI-RS resource tuple.

[0168] Example 23: The method according to Example 22, wherein the CSI includes an NZP CSI-RS resource tuple indicator CRTI, and one or more of the RI and PMI, L1-RSRP, or L1-SINR for each NZP CSI-RS resource in the tuple, as well as a combined CQI.

[0169] Certain embodiments may provide one or more of the following technical advantages. The embodiments disclosed herein enable the UE to select one or two TRP beams from a plurality of candidate beams and report the selected beam and CSI. This reduces the steps required to determine the optimal beam from multiple TRPs (or multiple panels from the same TRP), each TRP having multiple beams. By grouping the NZP CSI-RS resources used for channel measurements according to the associated TRP, it ensures that only one beam is selected from each NZP CSI-RS resource group. It also reduces the number of beam combinations the UE needs to search and the feedback overhead of the CRI.

[0170] When this solution is implemented for UE RX beam scanning instead of TRP TX beam scanning, the method will allow the UE to determine the appropriate UE TX beam for multi-TRP / multi-panel transmission based on user throughput performance, which will improve user throughput performance. The method will also enable the UE to report back the CSI directly related to the UE RX beam scanning, eliminating the need for an additional CSI-RS transmission that would otherwise be required to determine the appropriate CSI.

[0171] Figure 7 An example of a cellular communication system 700 that can implement embodiments of the present disclosure is shown. In the embodiments described herein, the cellular communication system 700 is a 5G system (5GS) including an NR RAN. In this example, the RAN includes base stations 702-1 and 702-2, referred to herein as gNBs, which control corresponding (macro)cells 704-1 and 704-2. Base stations 702-1 and 702-2 are generally referred to herein as base station 702, and are individually referred to as base station 702. Similarly, (macro)cells 704-1 and 704-2 are generally referred to herein as (macro)cell 704, and are individually referred to as (macro)cell 704. The RAN may also include a plurality of low-power nodes 706-1 to 706-4 that control corresponding small cells 708-1 to 708-4. Low-power nodes 706-1 to 706-4 may be small base stations (such as pico or femto base stations) or remote radio head ends (RRHs) or similar. It is worth noting that, although not shown, one or more of small cells 708-1 to 708-4 may alternatively be provided by base station 702. Low-power nodes 706-1 to 706-4 are generally referred to herein as low-power node 706, and are individually referred to as low-power node 706. Similarly, small cells 708-1 to 708-4 are generally referred to herein as small cell 708, and are individually referred to as small cell 708. Cellular communication system 700 also includes a core network 710, which is referred to in 5GS as 5G core (5GC). Base station 702 (and optionally low-power node 706) is connected to core system 710.

[0172] Base station 702 and low-power node 706 provide services to wireless communication devices 712-1 to 712-5 in corresponding cells 704 and 708. Wireless communication devices 712-1 to 712-5 are generally referred to herein as wireless communication device 712, and are individually referred to as wireless communication device 712. In the following description, wireless communication device 712 is typically a UE, and is therefore sometimes referred to herein as UE 712, but this disclosure is not limited thereto.

[0173] Now, descriptions of some example embodiments are provided.

[0174] NC-JT CSI Feedback with Two NZP CSI-RS Resource Groups

[0175] In this embodiment, the UE may be requested to report the CSI of the NC-JT based on two or more groups (e.g., a first group and a second group) of NZP CSI-RS (or SSB) resources used for channel measurement.

[0176] Each group of NZP CSI-RS (or SSB) used for channel measurements can be associated with a TRP (or with different panels of the same TRP) and can contain one or more NZP CSI-RS (or SSB) resources, each of which can be associated with a beam. In one embodiment, two or more different groups of NZP CSI-RS (or SSB) resources are associated with two or more different TCI states. Figure 9 An example is shown where two NZP CSI-RS groups, each with two NZP CSI-RS resources, are signaled to UE 212 from two TRPs 900-1 and 900-1 (TRP1 and TRP2).

[0177] One approach to grouping NZP CSI-RS is to use a set of NZP CSI-RS resources as a group. Therefore, CSI-ReportConfig is extended to include two or more resourcesForChannelMeasurement instances, each pointing to a group of NZP CSI-RS or SSBs that will be used for channel measurements.

[0178] In another embodiment, for non-periodic triggered NC-JT CSI reports, two or more NZP CSI-RS resource sets are introduced into each CSI-AssociatedReportConfigInfo element in the CSI-AperiodicTriggerStateList information element, where each NZP CSI-RS resource set serves as a group. Figure 8 As shown in the example, resourceSet and resourceSet2 represent two NZP CSI-RS resource sets introduced. Note that the resourceSet2 field is optional because the second NZP CSI-RS resource set is only required for non-periodic NC-JTCSI reports and not for other (i.e., other than NC-JT) non-periodic CSI reports.

[0179] Another aspect introduced in this embodiment is the introduction of two or more qcl-info fields per CSI-AssociatedReportConfigInfo. Each qcl-info field provides a TCI status, which in turn provides a QCL source and QCL type for each NZP-CSI-RS resource listed in the NZP CSI-RS resource set. Figure 8 In the example, qcl-info provides the TCI status corresponding to the NZP CSI-RS resource in resourceSet, while qcl-info2 provides the TCI status corresponding to the NZP CSI-RS resource in resourceSet2. Note that the qcl-info2 field is optional and only exists if the second NZP CSI-RS resource set (i.e., resourceSet2) appears in CSI-AssociatedReportConfigInfo.

[0180] It should be noted that NR Rel15 / 16 only allows each CSI-AssociatedReportConfigInfo to include one NZPCSI-RS resource set (i.e., resourceSet) and one QCL information (i.e., qcl-info), which is unsuitable for non-periodic NC-JT CSI reporting. Therefore, with the proposed introduction of resourceSet2 and qcl-info2, the NR CSI framework can support non-periodic NC-JT reporting.

[0181] In another embodiment, the CSI-ResourceConfig IE is extended to allow more than one periodic and semi-persistent NZP CSI-RS resource set for CSI measurements. Furthermore, more than one NZP CSI-RS (or SSB) resource set in the CSI resource settings (higher-level parameter CSI-ResourceConfig) can be configured in a non-periodic CSI triggered state. In this case, each NZP CSI-RS (or SSB) resource set corresponds to one NZP CSI-RS (or SSB) group.

[0182] Alternatively, NZP CSI-RS resources in different groups can belong to the same set of NZP CSI-RS resources. When all NZP CSI-RS resources belong to the same set, an additional indication is needed to group the NZP CSI-RS resources into different groups. In one such example, NZP CSI-RS resources are grouped based on their TCI states, such that NZP CSI-RS resources configured with the same TCI state belong to the same group. In another example, NZP CSI-RS resources can be grouped based on the QCL reference signal specified in their TCI states. For example, NZP CSI-RS resources with the same SSB index or NZP CSI-RS index in their TCI states belong to the same group.

[0183] In one embodiment, when different groups of NZP CSI-RS resources belong to the same set of NZP CSI-RS resources and linked parameters such as TCI status are used to distinguish which group the NZP CSI-RS resources belong to, the UE will need to perform the grouping after receiving the corresponding RRC configuration such as TCI status, and use the grouping when selecting CRI and corresponding CSI according to embodiments of this disclosure.

[0184] In another alternative, each NZP CSI-RS resource or group of NZP CSI-RS resources is associated with an index indicating that these resources were transferred from the same TRP. This index can be called a "trp index". In non-periodic CSI reports, grouping information can be included in the DCI message that triggers the CSI report. For example, a CSI trigger status can contain multiple NZPCSI-RS resources and indicate, implicitly or explicitly, that they belong to a particular TRP.

[0185] Alternatively, the NZP-CSI resource set or each individual NZP-CSI resource can be extended to include a higher-level CORESETPoolIndex, and for example, a first group includes NZP CSI-RS resources with CORESETPoolIndex = 0, and a second group includes NZP CSI-RS resources with CORESETPoolIndex = 1.

[0186] Figure 9 An example of CSI feedback based on two groups of NZP CSI-RS resources used for channel measurements is shown.

[0187] The UE selects one NZP CSI-RS resource in each group for CSI calculation. This selection can be based on the maximum DL UE throughput achievable when receiving two or more NZP CSI-RS resources simultaneously (e.g., using the codebook normalized in NR rel-15). The UE can be equipped with one or more receiver panels. The UE can report CSI in one of two scenarios:

[0188] 1. Select only one NZP CSI-RS group from a set of multiple groups, and then select one NZP CSI-RS resource from the selected group.

[0189] 2. Select two NZP CSI-RS groups, and select one resource from each of the two groups.

[0190] In Scenario 1, the reported CSI corresponds to a single TRP CSI report, where the CSI calculation is based on a single selected NZP CSI-RS resource used for channel measurements and includes a single set of RI, PMI, and CQI. The CRI is also reported to indicate the selected NZP CSI-RS resource within the selected group. A group indication can also be indicated if the CRI only indicates one of the NZP CSI-RS resources in the selected group. Alternatively, group selection is also implicitly indicated in the CRI, meaning the CRI can select and indicate NZP CSI-RS resources from more than one group; in this case, a group indicator is not required.

[0191] In Scenario 2, the reported CSI corresponds to NC-JT CSI, where PDSCH is transmitted over two TRPs. The CSI calculation is based on two selected NZP CSI-RS resources used for channel measurements and includes two sets of RI and PMI (one per NZP CSI-RS resource) and a joint CQI conditioned on these two sets of RI and PMI, taking into account any cross-layer or cross-TRP interference. A pair of CRIs is also reported to indicate the two selected NZP CSI-RS resources, where each CRI can select resources within a corresponding group. Alternatively, group indicators (or a pair of group indicators) are reported to select the two groups, and in addition, the CRI for each group (selecting resources within each selected group) is also reported. If only two groups are configured, group indicators are not necessary and may not be reported.

[0192] In another embodiment, an alternative to scenario 2 above is scenario 3, where the report corresponds to an NC-JT CSI with two PDSCHs scheduled by two PDCCHs and transmitted from two TRPs. In this case, two distinct CQIs (one for each group / TRP) can be reported instead of a combined CQI. Whether a single PDSCH (scenario 2) or multiple PDSCH (scenario 3) CSI should be reported can be indicated by adding a switch in CSI-ReportConfig or deduced from other higher-level parameters.

[0193] Regardless of Scenario 1 or Scenario 2, if the primary objective of the CSI report is to allow the UE to suggest a subset of transmissions from the TRP along with the corresponding transport beams (NZP CSI-RS resources), then in one embodiment, the CSI-ReportConfig may be provided with a reporting quantity different from 'cri-RI-PMI-CQI' (as assumed above), such as 'cri-RSRP' or 'cri-SINR', where each selected NZP CSI-RS resource or beam reports a Layer 1 (L1) RSRP or L1-SINR. In this case, the current CSI report can be the first step in the CSI reporting process, allowing subsequent UE RX beam determination to be performed before reporting, for example, RI, PMI, and / or CQI.

[0194] In one embodiment, CSI reporting for NC-JT in two or more groups with NZP CSI-RS (or SSB) resources can be explicitly indicated. For example, a CSI reporting configuration IE that uses RRC configuration to signal notifications from the gNB to the UE includes a parameter "NC-JT" that is set to "Enabled". This parameter may exist in the ReportQuantity IE.

[0195] In some other embodiments, whether the CSI report configuration corresponds to NC-JT CSI feedback is implicitly given by the number of CSI-RS resource sets (each corresponding to an NZP CSI-RS resource group) that are triggered or configured as follows:

[0196] In the case of periodic or semi-persistent CSI-RS resources, if the number of NZP CSI-RS resource sets configured per CSI-ResourceConfig is greater than one, and more than one NZP CSI-RS resource set is selected in the CSI-AssociatedReportConfigInfo of CSI-AperiodicTriggerState, then the corresponding CSI-ReportConfig associated with that CSI-ResourceConfig will be used for NC-JT-based CSI feedback. For example, if a CSI-ReportConfig is associated with a CSI-ResourceConfig that has more than one (e.g., two) NZP CSI-RS resource sets, and more than one NZP CSI-RS resource set is selected in the CSI-ResourceConfig of CSI-AperiodicTriggerState, then that CSI-ReportConfig has a report quantity set to multiple CRIs, multiple RIs, multiple PMIs, and CQIs (e.g., two CRIs, two RIs, two PMIs, and one CQI). On the other hand, if the number of NZP CSI-RS resource sets configured for each CSI-ResourceConfig is limited to one, then the CSI-ReportConfig associated with that CSI-ResourceConfig will be used for non-NC-JT-based CSI feedback as specified in NR Rel-15 and Rel-16.

[0197] • In the case of non-periodic CSI-RS resources, if the number of NZP CSI-RS resource sets configured per CSI-AssociatedReportConfigInfo is more than one (e.g., two), then the associated CSI-ReportConfig will be used for NC-JT-based CSI feedback when triggered non-periodicly. For example, if the number of NZP CSI-RS resource sets configured per CSI-AssociatedReportConfigInfo is more than one (e.g., two), then the associated CSI-ReportConfig should have a report quantity set to multiple CRIs, multiple RIs, multiple PMIs, and CQIs (e.g., two CRIs, two RIs, two PMIs, and one CQI). On the other hand, if the number of NZP CSI-RS resource sets configured per CSI-AssociatedReportConfigInfo is limited to one, then the associated CSI-ResourceConfig will be used for non-NC-JT-based CSI feedback.

[0198] The CSI feedback bit size for scenario 1 is smaller than that for scenario 2. Therefore, to reduce feedback overhead, different CSI sizes can be used for both scenarios. In one embodiment, an additional 1-bit indicator can be reported first to indicate whether the CSI is for scenario 1 or scenario 2, and the receiving gNB knows to report one or both sets of RI and PMI. In this case, in one embodiment, the CSI report can consist of three parts. The first part contains the scenario indicator, the second part contains CRI, RI, and wideband CQI, and the third part contains one or more PMIs. The first part is decoded to determine whether there is one or two RIs and PMIs in the second and third parts. The second part is then decoded to determine the size of the third part.

[0199] In another embodiment, two CRIs and two RIs can always be reported. In this case, the CSI report can consist of two parts, and each part is encoded separately. The first part contains two CRIs, two RIs, and a CQI, and the second part contains one or more PMIs. The first part has a fixed size and is decoded to determine the size of the second part. When one of the two RIs has a zero value, scenario 1 is indicated, and in this case, the corresponding CRI is ignored. If a resource is selected, a single PMI will be reported in the second part. The size of the second part is further determined by non-zero RIs. Figure 10 An example of two-part CSI encoding is shown in the figure.

[0200] Alternatively, the report includes the TCI status. An example of this two-part CSI coding is as follows: Figure 10 As shown in the image.

[0201] In other embodiments related to FR2, one or more of the following constraints, listed in emphasis below, apply. Here, it is assumed that the network can configure the maximum rank per group. For example, from the perspective of TRP1, the rank is at most 2, but from the perspective of TRP2, the transmission rank can be 4 because the gNB used for TRP2 is more advanced and capable of Layer 4 transmission. Therefore, the network indicates the rank constraint for each group to the UE, and this is taken into account when selecting the CSI used for reporting. For example, in this example, a UE capable of receiving 4 layers must compare receiving all 4 layers from TRP2 or receiving 2 layers each from TRP1 and TRP2. Given a certain BLER objective, the UE seeks the option that maximizes either spectral efficiency or throughput.

[0202] • UE will not select more than one NZP CSI-RS per group.

[0203] • The UE will not report RIs higher than the maximum RI for that group.

[0204] If the UE selects more than one NZP CSI-RS resource, it will be able to receive them simultaneously.

[0205] • If more than one group is selected, only one combination of RIs can be reported.

[0206] These rules ensure that the UE is reporting recommended transport assumptions and CSIs for TRP combinations or TRP selections that the network can deliver and the UE can receive.

[0207] In another embodiment, a TRP beam has already been determined for each TRP, and the TRP will now allow the UE to determine the appropriate UE RX beam for the corresponding UE panel (wherein this case, each UE panel is associated with one TRP). The gNB will then establish two groups of UE receive (RX) beam scans with NZP CSI-RS resources (each group corresponds to one TRP beam for one TRP and thus includes one NZP CSI-RS resource), and where the set of (one or more) NZP CSI-RS resources for the UE RX beam scan has a 'repetition' parameter set to 'on'. Then (e.g., by evaluating all the different PMIs in the multi-panel codebook for each beam pair) the UE can determine the UE RX beam pair that optimizes user throughput (i.e., one UE beam for the corresponding UE panel). The UE can then feed back CSI information, similar to that described above (except for CRI, which is not needed in this case because the TRP beam has already been determined).

[0208] Figure 11 An example of UE Rx beam scanning is shown when identifying the optimal Rx beam for receiving signals from each TRP.

[0209] In some of the descriptions above, only two groups of NZP CSI-RS (or SSB) resources are used (therefore, two TRPs or panels can be used in this method). However, this method is general and applicable to more than two groups of NZPCSI-RS (or SSB) resources (and therefore applicable to more than two TRPs or panels). In this case, the UE selects not only the beam from the TRP (i.e., the resource within the group), but also a pair of TRPs.

[0210] NC-JT CSI Feedback with a Set of NZP CSI-RS Resource Tuples

[0211] In another preferred embodiment, the UE is configured with a set of NZP-CSI-RS resource tuples. Each entry of a CRI can be configured via RRC or RRC+MAC CE to select one of the NZP CSI-RS resource tuples, in which case, for the NC-JT case, only a single CRI is reported. In this case, some CRI entries correspond to a single NZP CSI-RS, some correspond to two NZP CSI-RS, and some may correspond to more than two NZP CSI-RS resources. The size of the tuple reflects how many TRPs will be involved in the PDSCH transmission.

[0212] Furthermore, in this scenario, the UE will report one PMI and one RI for each NZP CSI-RS resource, along with a joint CQI value. For example, if a CRI points to a pair of NZP CSI-RS resources, the UE will report two PMIs and two RIs.

[0213] In other alternative embodiments, if NC-JT CSI reporting is enabled, the UE is configured to associate entries in the CRI list with entries in the active TCI state table. For example, a first CRI means selecting one or more NZP CSI-RS of the first entry in the configured TCI state table. Since the entries in the TCI state table are possible NC-JT transmissions (using single DCI multi-TRP scheduling), these are the most suitable combination of two NZP CSI-RS resources for channel measurements that are of direct interest to the CSI report. This can be viewed as the UE reporting the preferred TCI state from a set of configured TCI states in the CSI report. This embodiment can be combined with other embodiments by interpreting “CRI” as “TCI state”.

[0214] The report size will depend on the preferred CRI: the number of PMIs and RIs to be reported directly depends on the size of the tuple indicated by the CRI. Therefore, after decoding the CRI, the NW knows the format of the remaining information: it is not necessary to explicitly indicate how many PMIs; the CRI should be included in the report. However, to facilitate this, the CRI needs to be encoded separately. Therefore, in one embodiment, the report is encoded into two separate parts: the first part contains the CRI and CQI, and the second part contains the remaining information. See, for example, [link to relevant documentation]. Figure 12 .

[0215] In one embodiment, these double or triple NZP CSI-RS resources corresponding to the entries of CRIs configured via RRC or RRC+MAC CE are configured as elements in a set of NZP CSI-RS resources configured in CSI-ResourceConfig, which further points to CSI-ReportConfig. This embodiment assumes the existing method of reporting one CRI per NZP-CSI-RS set. This embodiment can be combined with embodiments that extend CSI-ResourceConfig to have more than one set of NZP CSI-RS resources for CSI reporting.

[0216] In relevant embodiments, the elements in the NZP-CSI-RS set are constructed as follows:

[0217] One option is to extend the individual NZP-CSI-RS configuration to directly configure NZP-CSI-RS resources corresponding to the double, triple, or other multiples. Figure 13 An example is shown that simply marks bold text to include extensions.

[0218] • In another option, the new NZP-CSI-RS-Resource IE aggregates two or more original NZP-CSI-RS-Resources, and this is used as an element in the NZP-CSI-RS-Resource set.

[0219] In another embodiment, the RRC configures a larger set of NZP-CSI-RS resources, which here corresponds to the configured CRI entries, and the MAC CE is used to select NZP-CSI-RS elements downwards from the larger list to a set (or other items) of size 8. The MAC CE will include one or all of the following payload fields, and may include some other fields:

[0220] • Service Community ID

[0221] • CSI-ResourceConfig ID

[0222] · NZP CSI-RS Resource Collection ID

[0223] • Bitmap, used to select N NZP-CSI-RS resources or aggregated resources, i.e., elements of the NZP-CSI-RS resource set.

[0224] • Field F, whose marker MAC CE has another and / or how many NZP CSI-RS resource set ID fields corresponding to the first NZP CSI-RS resourceConfigID.

[0225] • Field E, which marks the MAC CE as having another and / or how many NZPCSI-RS Config ID fields corresponding to the serving cell ID.

[0226] Additional description

[0227] Figure 14 Operation of a wireless communication device 712 (e.g., a UE) and a network node (e.g., a wireless access node 712, such as a base station (e.g., a gNB)) according to at least some of the above embodiments is illustrated. As shown, the wireless communication device 712 receives a CSI reporting configuration from the network node, the CSI reporting configuration including a first group of one or more NZP CSI-RS resources for channel measurement and a second group of one or more NZP CSI-RS resources for channel measurement (step 1400). The wireless communication device 712 selects one or more NZP CSI-RS resources to be used for reporting (step 1402). The selected NZP CSI-RS resources(s) are selected from a set of options including: (a) a first option consisting of a first NZP CSI-RS resource in the first group, (b) a second option consisting of a second NZP CSI-RS resource in the second group, and (c) a third option consisting of the first NZP CSI-RS resource in the first group and the second NZP CSI-RS resource in the second group. The wireless communication device 712 then reports information including the CSI based on one or more selected NZP CSI-RS resources and an indication of the selected(one or more) NZP CSI-RS resources (step 1404).

[0228] While any of the embodiments described above regarding the foregoing CSI reporting configuration, selection of one or more NZPCSI-RS resources to be used for reporting, and instructions for reporting CSI and the selected one or more NZP CSI-RS resources may be used, some examples have been described above.

[0229] In some embodiments, a first group of one or more NZP CSI-RS resources and a second group of one or more NZP CSI-RS resources correspond to a first NZP CSI-RS resource set and a second NZP CSI-RS resource set, respectively. Furthermore, in some embodiments, the first and second NZP CSI-RS resource sets are configured in two CSI resource settings included in the CSI reporting configuration. In some embodiments, the first and second NZP CSI-RS resource sets are included in a single CSI resource setting included in the CSI reporting configuration. Furthermore, in some embodiments, the first and second NZP CSI-RS resource sets included in a single CSI resource setting are configured in an aperiodic CSI trigger state associated with the CSI reporting configuration. In some embodiments, the aperiodic CSI trigger state further includes a first quasi-co-location QCL indication and a second QCL indication, respectively, for the first and second NZP CSI-RS resource sets.

[0230] In some embodiments, a first group of one or more NZP CSI-RS resources and a second group of one or more NZP CSI-RS resources are included in a single NZP CSI-RS resource set. In some embodiments, the first group of one or more NZP CSI-RS resources or the second group of one or more NZP CSI-RS resources is identified by an index included in each NZP CSI-RS resource configuration. In some embodiments, the index may be one of the following: a TCI index, a control resource pool index, or a new group index.

[0231] In some embodiments, the wireless communication device 712 selects one or more NZP CSI-RS resources based on the maximum downlink throughput that each option in the option set can provide.

[0232] In some embodiments, the selected one or more NZP CSI-RS resources include a first NZP CSI resource or a second NZP CSI resource, and the CSI based on the selected one or more NZP CSI-RS resources includes one or more of the following: (a) RI, (b) PMI, (c) CQI, (d) Layer-1 Received Reference Signal Power L1-RSRP, (e) Layer-1 Signal-to-Interference-Noise Ratio L1-SINR, (f) NZP CSI-RS Resource Indicator CRI, (g) NZP CSI-RS Resource Group Indicator CRGI, or (h) any combination of two or more of (a)-(g).

[0233] In some embodiments, the selected NZP CSI-RS resource(s) includes a first NZP CSI-RS resource(s) and a second NZP CSI-RS resource(s), and the CSI based on the selected NZP CSI-RS resource(s) includes a first NZP CSI-RS resource indicator(CRI1) and a second NZP CSI-RS resource indicator(CR2), and respectively associated with a first rank indicator(RI1) and a second rank indicator(RI2), a first precoding matrix indicator(PMI1) and a second precoding matrix indicator(PMI2), and a joint channel quality indicator(CQI). In some other embodiments, the selected NZP CSI-RS resources include a first NZP CSI-RS resource and a second NZP CSI-RS resource, and the CSI based on the selected NZP CSI-RS resources includes a first NZP CSI-RS resource indicator (CRI1) and a second NZP CSI-RS resource indicator (CRI2), and respectively associated with a first rank indicator (RI1) and a second rank indicator (RI2), a first precoding matrix indicator (PMI1) and a second precoding matrix indicator (PMI2), and a first channel quality indicator (CQI1) and a second channel quality indicator (CQI2). In some embodiments, the CSI is calculated assuming that noncoherent joint transmission (JC-JT) of PDSCH is performed on antenna ports configured in both the first NZP CSI-RS resource and the second NZP CSI-RS resource on the same time and frequency resources. In some other embodiments, the CSI based on one or more selected NZP CSI-RS resources includes a first NZP CSI-RS resource indicator (CRI1) and a second NZP CSI-RS resource indicator (CRI2), and a first RSRP and a second RSRP or a first SINR and a second SINR, respectively associated with each other. In some embodiments, CRI1, CRI2, and / or CRGI may be jointly encoded.

[0234] In some embodiments, the indication of one or more selected NZP CSI-RS resources includes RI = 0 for the second (or first) NZP CSI-RS resource.

[0235] In some embodiments, the CSI report configuration also includes a codebook configuration.

[0236] In some embodiments, the CSI reporting configuration also includes a reporting volume indicator that indicates the CSI report of the NC-JT. In some embodiments, the reporting volume indicator may further indicate whether the CSI report includes a combined CQI or a pair of CQIs.

[0237] In some embodiments, the CSI reporting configuration may also include one or more CSI-IM resources.

[0238] Figure 14B Operation of at least some of the wireless communication devices 712 (e.g., UE) and network nodes (e.g., radio access node 712, such as a base station (e.g., gNB)) according to the above embodiments is illustrated. As shown, the wireless communication device 712 receives a configuration of an NZP CSI-RS resource set from the network node, which includes a list of NZP CSI-RS resource tuples, each tuple including one or more NZP CSI-RS resources (step 1400-B). The wireless communication device 712 receives a CSI report configuration including the NZP CSI-RS resource set for channel measurement (step 1402-B). The wireless communication device 712 determines the NZP CSI-RS resource tuples from the list of NZP CSI-RS resource tuples (step 1404-B) and reports the CSI based on the determined NZP CSI-RS resource tuples and the indication of the determined NZP CSI-RS resource tuples (step 1406-B). In one embodiment, the CIS includes an NZP CSI-RS resource tuple indicator (CRTI), and one or more of the RI and PMI, L1-RSRP, or L1-SINR for each NZP CSI-RS resource in the tuple, as well as a joint CQI. Note that the other details described above relating to NC-JT CSI feedback with a set of NZP CSI-RS resource tuples also apply here. Figure 14B The process.

[0239] Figure 15This is a schematic block diagram of a radio access node 1500 according to some embodiments of the present disclosure. Optional features are indicated by dashed boxes. The radio access node 1500 may be, for example, a base station 702 or 706, or a network node implementing all or part of the functionality of the base station 702 or gNB described herein. As shown, the radio access node 1500 includes a control system 1502, which includes one or more processors 1504 (e.g., a central processing unit (CPU), application-specific integrated circuit (ASIC), field-programmable gate array (FPGA), and / or the like), a memory 1506, and a network interface 1508. The one or more processors 1504 are also referred to herein as processing circuitry. Furthermore, the radio access node 1500 may include one or more radio units 1510, each radio unit 1510 including one or more transmitters 1512 and one or more receivers 1514 coupled to one or more antennas 1516. The radio unit 1510 may be referred to as or is part of the radio interface circuitry. In some embodiments, one or more radio units 1510 are external to and connected to the control system 1502 via, for example, a wired connection (e.g., fiber optic cable). However, in some other embodiments, one or more radio units 1510, and potentially one or more antennas 1516, are integrated with the control system 1502. One or more processors 1504 operate to provide one or more functions of the radio access node 1500 as described herein. In some embodiments, one or more functions are implemented in software, which is stored, for example, in memory 1506 and executed by one or more processors 1504.

[0240] Figure 16 This is a schematic block diagram illustrating a virtualized embodiment of a radio access node 1500 according to some embodiments of the present disclosure. This discussion is equally applicable to other types of network nodes. Furthermore, other types of network nodes may have similar virtualization architectures. Similarly, optional features are indicated by dashed boxes.

[0241] As used herein, a “virtualized” radio access node is an implementation of radio access node 1500 in which at least a portion of the functionality of radio access node 1500 (e.g., via one or more virtual machines executing on one or more physical processing nodes in one or more networks) is implemented as one or more virtual components. As illustrated in this example, radio access node 1500 may include a control system 1502 and / or one or more radio units 1510, as described above. Control system 1502 may be connected to one or more radio units 1510 via, for example, fiber optic cable or the like. Radio access node 1500 includes one or more processing nodes 1600 coupled to or included as part of one or more networks 1602. If present, control system 1502 or one or more radio units are connected to one or more processing nodes 1600 via network 1602. Each processing node 1600 includes one or more processors 1604 (e.g., CPU, ASIC, FPGA, and / or the like), memory 1606, and network interface 1608.

[0242] In this example, the functionality 1610 of the radio access node 1500 described herein is distributed or implemented at one or more processing nodes 1600 and control systems 1502 and / or (one or more) radio units 1510 in any desired manner. In some specific embodiments, some or all of the functionality 1610 of the radio access node 1500 described herein is implemented as virtual components executed by one or more virtual machines, which are implemented in one or more virtual environments hosted by (one or more) processing nodes 1600. As will be appreciated by those skilled in the art, additional signaling or communication between (one or more) processing nodes 1600 and control systems 1502 is used to implement at least some of the desired functionality 1610. It is noteworthy that in some embodiments, control system 1502 may be omitted, in which case (one or more) radio units 1510 communicate directly with (one or more) processing nodes 1600 via (one or more) appropriate network interfaces.

[0243] In some embodiments, a computer program including instructions, when executed by at least one processor, causes the at least one processor to perform the functionality of a radio access node 1500 according to any embodiment described herein, or a node (e.g., a processing node 1600) implementing one or more functions 1610 of the radio access node 1500 in a virtual environment. In some embodiments, a carrier including the aforementioned computer program product is provided. The carrier is one of the following: an electronic signal, an optical signal, a radio signal, or a computer-readable storage medium (e.g., a non-transitory computer-readable medium such as a memory).

[0244] Figure 17 This is a schematic block diagram of a radio access node 1500 according to some other embodiments of the present disclosure. The radio access node 1500 includes one or more modules 1700, each module 1700 being implemented in software. The modules (one or more) 1700 provide the functionality of the radio access node 1500 described herein. This discussion is equally applicable to... Figure 16 The processing node 1600, wherein the module 1700 may be implemented at one of the processing nodes 1600, or distributed across multiple processing nodes 1600, and / or distributed across (one or more) processing nodes 1600 and the control system 1502.

[0245] Figure 18 This is a schematic block diagram of a wireless communication device 1800 according to some embodiments of the present disclosure. As shown, the wireless communication device 1800 includes one or more processors 1802 (e.g., CPU, ASIC, FPGA, and / or such), a memory 1804, and one or more transceivers 1806, each transceiver 1806 including one or more transmitters 1808 and one or more receivers 1810 coupled to one or more antennas 1812. As those skilled in the art will understand, the transceiver(s) 1806 includes radio front-end circuitry connected to the antenna(s) 1812, which is configured to modulate signals transmitted between the antenna(s) 1812 and the processor(s) 1802. The processor 1802 is also referred to herein as processing circuitry. The transceiver 1806 is also referred to herein as radio circuitry. In some embodiments, the functionality of the wireless communication device 1800 described above (e.g., the functionality of a UE) may be implemented entirely or partially in software, which may be stored, for example, in the memory 1804 and executed by the processor(s) 1802. Note that the wireless communication device 1800 may include... Figure 18Additional components not shown, such as one or more user interface components (e.g., including displays, buttons, touch screens, microphones, speakers (one or more), and / or input / output interfaces such as these, and / or any other components for allowing information to be input into and / or output from the wireless communication device 1800), power supplies (e.g., batteries and associated power circuitry), etc.

[0246] In some embodiments, a computer program including instructions is provided that, when executed by at least one processor, cause the at least one processor to perform the functionality of a wireless communication device 1800 according to any embodiment described herein. In some embodiments, a carrier including the aforementioned computer program product is provided. The carrier is one of the following: an electronic signal, an optical signal, a radio signal, or a computer-readable storage medium (e.g., a non-transitory computer-readable medium such as a memory).

[0247] Figure 19 This is a schematic block diagram of a wireless communication device 1800 according to some other embodiments of the present disclosure. The wireless communication device 1800 includes one or more modules 1900, each module 1900 being implemented in software. The one or more modules 1900 provide the functionality of the wireless communication device 1800 described herein.

[0248] refer to Figure 20 According to an embodiment, the communication system includes a telecommunications network 2000, such as a 3GPP-type cellular network, which includes an access network 2002 (such as a RAN) and a core network 2004. The access network 2002 includes multiple base stations 2006A, 2006B, and 2006C for each custom-defined coverage area 2008A, 2008B, and 2008C, such as node Bs, eNBs, gNBs, or other types of radio access points (APs). Each base station 2006A, 2006B, and 2006C can be connected to the core network 2004 via a wired or wireless connection 2010. A first UE 2012 located in coverage area 2008C is configured to wirelessly connect to or be paged by the corresponding base station 2006C. A second UE 2014 located in coverage area 2008A can wirelessly connect to the corresponding base station 2006A. Although multiple UEs 2012 and 2014 are shown in this example, the disclosed embodiments are equally applicable to situations where only one UE is in the coverage area or where only one UE is connected to the corresponding base station 2006.

[0249] Telecommunication network 2000 is itself connected to host computer 2016, which may be embodied in the hardware and / or software of a standalone server, a cloud-implemented server, a distributed server, or as a processing resource in a server farm. Host computer 2016 may be owned or controlled by a service provider, or may be operated by or on behalf of a service provider. Connections 2018 and 2020 between telecommunications network 2000 and host computer 2016 may extend directly from core network 2004 to host computer 2016 or via optional intermediate network 2022. Intermediate network 2022 may be one of a public, private, or hosted network, or a combination of more than one of a public, private, or hosted network; intermediate network 2022 (if any) may be a backbone network or the Internet; in particular, intermediate network 2022 may include two or more subnets (not shown).

[0250] Figure 20 The communication system as a whole enables connectivity between connected UEs 2012 and 2014 and host computer 2016. This connectivity can be described as an over-the-top (OTT) connection 2024. Host computer 2016 and connected UEs 2012 and 2014 are configured to transmit data and / or signaling via OTT connection 2024 using access network 2002, core network 2004, any intermediate network 2022, and possibly other infrastructure (not shown) as intermediaries. OTT connection 2024 can be transparent in the sense that the participating communication devices traversing OTT connection 2024 are unaware of the routes of uplink and downlink communications. For example, it may not be necessary or required to inform base station 2006 about past routes of incoming downlink communications containing data originating from host computer 2016 to be forwarded (e.g., transferred) to connected UE 2012. Similarly, base station 2006 does not need to know the future routes of outgoing uplink communications originating from UE 2012 toward host computer 2016.

[0251] According to the embodiments, reference will now be made to Figure 21Example implementations of the UE, base station, and host computer discussed in the preceding paragraphs are described. In communication system 2100, host computer 2102 includes hardware 2104, which includes a communication interface 2106 configured to establish and maintain wired or wireless connections with interfaces of different communication devices of communication system 2100. Host computer 2102 further includes processing circuitry 2108, which may have storage and / or processing capabilities. In particular, processing circuitry 2108 may include one or more programmable processors, ASICs, FPGAs, or combinations thereof (not shown) suitable for executing instructions. Host computer 2102 further includes software 2110, which is stored in or accessible by host computer 2102 and executable by processing circuitry 2108. Software 2110 includes host application 2112. Host application 2112 is operable to provide services to a remote user (such as UE 2114) connected via an OTT connection 2116 terminated at the host computer 2102. When providing services to the remote user, host application 2112 can provide user data transmitted using the OTT connection 2116.

[0252] The communication system 2100 further includes a base station 2118, which is provided in the telecommunications system and includes hardware 2120 enabling it to communicate with the host computer 2102 and the UE 2114. The hardware 2120 may include a communication interface 2122 for setting up and maintaining wired or wireless connections to different communication devices of the communication system 2100, and for setting up and maintaining connections with the coverage area served by the base station 2118 (in... Figure 21 The UE 2114 (not shown) has at least a radio interface 2124 for a wireless connection 2126. A communication interface 2122 can be configured to facilitate a connection 2128 to a host computer 2102. The connection 2128 can be direct or it can traverse the core network of a telecommunications system (in...). Figure 21 (Not shown) and / or via one or more intermediate networks outside the telecommunications system. In the illustrated embodiment, the hardware 2120 of base station 2118 further includes processing circuitry 2130, which may include one or more programmable processors, ASICs, FPGAs, or combinations thereof (not shown) adapted to execute instructions. Base station 2118 further has software 2132 that is internally stored or accessible via an external connection.

[0253] The communication system 2100 further includes the previously mentioned UE 2114. The hardware 2134 of the UE 2114 may include a radio interface 2136 configured to establish and maintain a wireless connection 2126 with a base station serving the coverage area where the UE 2114 is currently located. The hardware 2134 of the UE 2114 further includes processing circuitry 2138, which may include one or more programmable processors, ASICs, FPGAs, or combinations thereof (not shown) suitable for executing instructions. The UE 2114 further includes software 2140, which is stored in or accessible by the UE 2114 and executable by the processing circuitry 2138. The software 2140 includes a client application 2142. The client application 2142 may be operable to provide services to human or non-human users via the UE 2114 with the support of the host computer 2102. In host computer 2102, the executing host application 2112 can communicate with the executing client application 2142 via an OTT connection 2116 terminated at UE 2114 and host computer 2102. When providing services to a user, client application 2142 can receive request data from host application 2112 and provide user data in response to the request data. OTT connection 2116 can transmit both request data and user data. Client application 2142 can interact with the user to generate the user data it provides.

[0254] Notice Figure 21 The host computer 2102, base station 2118, and UE 2114 shown can be respectively connected to... Figure 20 The host computer 2016, base station 2006A, 2006B, 2006C, and UE 2012, 2014 are similar or identical. That is, the internal workings of these entities can be as follows: Figure 21 As shown in the diagram, and independently, the surrounding network topology can be Figure 20 The surrounding network topology.

[0255] exist Figure 21 The OTT connection 2116 has been abstractly depicted to illustrate communication between host computer 2102 and UE 2114 via base station 2118, without explicitly mentioning any intermediate devices or the precise routing of messages through these devices. The network infrastructure can determine the routing, which can be configured to hide the routing from either UE 2114 or the service provider operating host computer 2102. Although OTT connection 2116 is active, the network infrastructure can further make decisions that dynamically change the routing (e.g., based on load balancing considerations or network reconfiguration).

[0256] The wireless connection 2126 between UE 2114 and base station 2118 is based on the teachings of embodiments described throughout this disclosure. One or more of the various embodiments improve the performance of OTT services provided to UE 2114 using OTT connection 2116, in which wireless connection 2126 forms the final segment.

[0257] Measurement procedures may be provided for the purpose of monitoring data rates, latency, and other factors that improve upon one or more embodiments. Optional network functionality may further exist for reconfiguring the OTT connection 2116 between the host computer 2102 and the UE 2114 in response to changes in measurement results. The measurement procedures and / or network functionality for reconfiguring the OTT connection 2116 may be implemented in the software 2110 and hardware 2104 of the host computer 2102 or in the software 2140 and hardware 2134 of the UE 2114, or both. In some embodiments, sensors (not shown) may be deployed in or associated with communication devices through which the OTT connection 2116 passes; the sensors may participate in the measurement procedure by supplying values ​​of the monitored quantities illustrated above or by supplying values ​​of other physical quantities from which the software 2110, 2140 can calculate or estimate the monitored quantities. Reconfiguration of the OTT connection 2116 may include message formatting, retransmission settings, preferred routing, etc.; reconfiguration does not need to affect the base station 2118, and it may be unknown or undetectable to the base station 2118. Such processes and functionality can be known and practiced in the art. In some embodiments, measurements may involve dedicated UE signaling that facilitates measurements of throughput, propagation time, latency, etc., of the host computer 2102. Measurements are possible because software 2110 and 2140 prompt the use of the OTT connection 2116 to transmit messages, particularly empty or "dummy" messages, when monitoring propagation time, errors, etc.

[0258] Figure 22 This is a flowchart illustrating a method implemented in a communication system according to one embodiment. The communication system includes a host computer, a base station, and a UE, which may be referenced... Figure 20 and 21 Those described. To simplify this disclosure, this section will only include those related to... Figure 22Referring to the accompanying drawings. In step 2200, the host computer provides user data. In sub-step 2202 of step 2200 (which may be optional), the host computer provides user data by executing a host application. In step 2204, the host computer initiates a transmission carrying user data to the UE. In step 2206 (which may be optional), in accordance with the teachings of the embodiments described throughout this disclosure, the base station transmits the user data carried in the transmission initiated by the host computer to the UE. In step 2208 (which may also be optional), the UE executes a client application associated with the host application executed by the host computer.

[0259] Figure 23 This is a flowchart illustrating a method implemented in a communication system according to one embodiment. The communication system includes a host computer, a base station, and a UE, which may be referenced in the appendix. Figure 20 and 21 Those described. To simplify this disclosure, this section will only include those related to... Figure 23 Refer to the accompanying drawings. In step 2300 of the method, the host computer provides user data. In an optional sub-step (not shown), the host computer provides user data by executing a host application. In step 2302, the host computer initiates a transmission carrying user data to the UE. According to the teachings of the embodiments described throughout this disclosure, the transmission can be carried out via a base station. In step 2304 (which may be optional), the UE receives the user data carried in the transmission.

[0260] Figure 24 This is a flowchart illustrating a method implemented in a communication system according to one embodiment. The communication system includes a host computer, a base station, and a UE, which may be referenced... Figure 20 and 21 Those described. To simplify this disclosure, this section will only include those related to... Figure 24Referring to the accompanying drawings. In step 2400 (which may be optional), the UE receives input data provided by the host computer. Alternatively or concurrently, in step 2402, the UE provides user data. In sub-step 2404 of step 2400 (which may be optional), the UE provides user data by executing a client application. In sub-step 2406 of step 2402 (which may be optional), the UE executes a client application that provides user data as a response to the received input data provided by the host computer. When providing user data, the executed client application may further consider user input received from the user. Regardless of the specific method used to provide user data, the UE initiates the transmission of user data to the host computer in sub-step 2408 (which may be optional). In step 2410 of the method, the host computer receives user data transmitted from the UE, in accordance with the teachings of the embodiments described throughout this disclosure.

[0261] Figure 25 This is a flowchart illustrating a method implemented in a communication system according to one embodiment. The communication system includes a host computer, a base station, and a UE, which may be referenced... Figure 20 and 21 Those described. To simplify this disclosure, this section will only include those related to... Figure 25 Refer to the accompanying drawings. In step 2500 (which may be optional), the base station receives user data from the UE in accordance with the teachings of the embodiments described throughout this disclosure. In step 2502 (which may be optional), the base station initiates a transmission of the received user data to the host computer. In step 2504 (which may be optional), the host computer receives the user data carried in the transmission initiated by the base station.

[0262] Any suitable steps, methods, features, functions, or benefits disclosed herein can be performed by one or more functional units or modules of one or more virtual devices. Each virtual device may include multiple such functional units. These functional units may be implemented via processing circuitry, which may include one or more microprocessors or microcontrollers and other digital hardware, such as digital signal processors (DSPs), application-specific digital logic, etc. The processing circuitry may be configured to execute program code stored in memory, which may include one or more types of memory, such as read-only memory (ROM), random access memory (RAM), cache memory, flash memory devices, optical storage devices, etc. The program code stored in the memory includes program instructions for executing one or more telecommunications and / or data communication protocols and instructions for executing one or more of the techniques described herein. In some implementations, the processing circuitry may be used to cause corresponding functional units to perform corresponding functions according to one or more embodiments of this disclosure.

[0263] While the processes in the figures may illustrate a particular order of operations performed by certain embodiments of this disclosure, it should be understood that such order is exemplary (e.g., alternative embodiments may perform operations in a different order, combine certain operations, overlap certain operations, etc.).

[0264] Group A Examples

[0265] Example 1: A method performed by a wireless communication device for reporting Channel State Information (CSI) in a wireless network, the method comprising one or more of the following:

[0266] • Receive (1400) CSI report configuration, the CSI report configuration including a first group of one or more non-zero power CSI reference signal NZP CSI-RS resources for channel measurement, and a second group of one or more NZP CSI-RS resources for channel measurement; and

[0267] • Select (1402) one or more NZP CSI-RS resources to be used for reporting. The selected NZP CSI-RS resources are chosen from a set of options that include:

[0268] ○ First option, which consists of the first NZP CSI-RS resource in the first group;

[0269] ○ The second option, which consists of the second NZP CSI-RS resource in the second group; and

[0270] ○ A third option, comprising the first NZP CSI-RS resource in the first group and the second NZP CSI-RS resource in the second group; and

[0271] • Report (1404) information, including:

[0272] • CSI based on one or more selected NZP CSI-RS resources; and

[0273] • Indication of one or more NZP CSI-RS resources selected.

[0274] Example 2: According to the method described in Example 1, the first group of one or more NZP CSI-RS resources and the second group of one or more NZP CSI-RS resources correspond to the first NZP CSI-RS resource set and the second NZP CSI-RS resource set, respectively.

[0275] Example 3: According to the method described in Example 2, the first NZP CSI-RS resource set and the second NZP CSI-RS resource set are configured in the two CSI resource settings included in the CSI report configuration.

[0276] Example 4: According to the method described in Example 2, the first NZP CSI-RS resource set and the second NZP CSI-RS resource set are included in a single CSI resource setting, which is included in the CSI report configuration.

[0277] Example 5: According to the method of Example 4, the first NZP CSI-RS resource set and the second NZP CSI-RS resource set included in the single CSI resource setting are configured in a non-periodic CSI triggering state associated with the CSI report configuration.

[0278] Example 6: According to the method described in Example 5, the non-periodic CSI trigger state further includes a first quasi-cooperative positioning QCL indication and a second QCL indication for the first NZP CSI-RS resource set and the second NZP CSI-RS resource set, respectively.

[0279] Example 7: According to the method of Example 1, wherein the first group of one or more NZP CSI-RS resources and the second group of one or more NZP CSI-RS resources are included in a single NZP CSI-RS resource set.

[0280] Example 8: According to the method described in Example 7, the first group of one or more NZP CSI-RS resources or the second group of one or more NZP CSI-RS resources is identified by an index included in each NZP CSI-RS resource configuration.

[0281] Example 9: According to the method described in Example 8, the index may be one of the following: an index of the Transmission Configuration Indicator (TCI); a control resource pool index; or a new group index.

[0282] Example 10: The method according to any one of Examples 1 to 9, wherein selecting the one or more NZPCSI-RS resources includes selecting the one or more NZP CSI-RS resources based on the maximum downlink throughput that each option in the option set can provide.

[0283] Example 11: The method according to any one of Examples 1 to 10, wherein the selected one or more NZPCSI-RS resources include the first NZP CSI resource or the second NZP CSI resource, and the CSI based on the selected one or more NZP CSI-RS resources includes one or more of the following: (a) Rank indicator RI; (b) Precoding matrix indicator PMI; (c) Channel quality indicator CQI; (d) Layer-1 Received Reference Signal Power L1-RSRP; (e) Layer-1 Signal-to-Interference-Noise Ratio L1-SINR; (f) NZP CSI-RS resource indicator CRI; (g) NZP CSI-RS resource group indicator CRGI; or (h) any combination of two or more of (a) to (g).

[0284] Example 12: The method according to any one of Examples 1 to 10, wherein the selected one or more NZPCSI-RS resources include the first NZP CSI-RS resources and the second NZP CSI-RS resources, and the CSI based on the selected one or more NZP CSI-RS resources includes a first NZP CSI-RS resource indicator (CRI1) and a second NZPCSI-RS resource indicator (CRI2), and respectively associated with a first rank indicator (RI1) and a second rank indicator (RI2), a first precoding matrix indicator (PMI1) and a second precoding matrix indicator (PMI2), and a joint channel quality indicator (CQI).

[0285] Example 13: The method according to any one of Examples 1 to 10, wherein the selected one or more NZP CSI-RS resources include the first NZP CSI-RS resource and the second NZP CSI-RS resource, and the CSI based on the selected one or more NZP CSI-RS resources includes a first NZP CSI-RS resource indicator (CRI1) and a second NZP CSI-RS resource indicator (CRI2), and respectively associated with a first rank indicator (RI1) and a second rank indicator (RI2), a first precoding matrix indicator (PMI1) and a second precoding matrix indicator (PMI2), and a first channel quality indicator (CQI) and a second channel quality indicator (CQI2).

[0286] Example 14: The method according to any one of Examples 12 to 13, wherein the CSI is calculated by assuming that noncoherent joint transmission JC-JT of Physical Downlink Shared Channel (PDSCH) is performed on the antenna ports configured in both the first NZP CSI-RS resource and the second NZP CSI-RS resource on the same time and frequency resources.

[0287] Example 15: The method according to any one of Examples 1 to 10, wherein the CSI based on one or more selected NZP CSI-RS resources includes a first NZP CSI-RS resource indicator (CRI1) and a second NZP CSI-RS resource indicator (CRI2), and a first RSRP and a second RSRP or a first SINR and a second SINR respectively associated.

[0288] Example 16: The method described in Examples 11 to 15, wherein CRI1, CRI2, and / or CRGI can be jointly encoded.

[0289] Example 17: The method according to Examples 11 to 15, wherein the indication of the selected one or more NZP CSI-RS resources includes RI = 0 for the second NZP CSI-RS resource (or the first NZP CSI-RS resource).

[0290] Example 18: The method according to any one of Examples 1 to 17, wherein the CSI report configuration further includes a codebook configuration.

[0291] Example 19: The method according to any one of Examples 1 to 18, wherein the CSI report configuration further includes a report volume indicator that indicates CSI reporting for NC-JT.

[0292] Example 20: The method according to Examples 1 to 18, wherein the report quantity indicator may also indicate whether the CSI report includes a combined CQI or a pair of CQIs.

[0293] Example 21: The method according to Examples 1 to 18, wherein the CSI report configuration further includes one or more CSI interference measurement CSI-IM resources.

[0294] Example 22: A method performed by a wireless device for reporting Channel State Information (CSI) in a wireless network, the method comprising one or more of the following: receiving a configuration of a set of non-zero power CSI reference signals (NZP CSI-RS) resources, the configuration including a list of NZP CSI-RS resource tuples, each NZP CSI-RS resource tuple including one or more NZP CSI-RS resources; receiving a CSI reporting configuration including the set of NZP CSI-RS resources for channel measurement; determining an NZP CSI-RS resource tuple from the list of NZP CSI-RS resource tuples; and reporting the CSI based on the determined NZP CSI-RS resource tuple and an indication of the determined NZP CSI-RS resource tuple.

[0295] Example 23: The method according to Example 22, wherein the CSI includes an NZP CSI-RS resource tuple indicator CRTI, and one or more of the RI and PMI, L1-RSRP, or L1-SINR for each NZP CSI-RS resource in the tuple, as well as a combined CQI.

[0296] Example 24: The method according to any one of the foregoing embodiments further includes: providing user data; and forwarding the user data to a host computer via transmission to a base station.

[0297] Group B Implementation Examples

[0298] Example 25: A method performed by a base station, the method comprising one or more of the following:

[0299] • Provide a (1400) CSI report configuration to the wireless communication device, the CSI report configuration including a first group of one or more non-zero power CSI reference signal (NZP) CSI-RS resources for channel measurement, and a second group of one or more NZP CSI-RS resources for channel measurement; and

[0300] • Receive (1404) information from the wireless communication device, the information including:

[0301] • CSI based on one or more NZP CSI-RS resources selected, wherein the selected one or more NZPCSI-RS resources are chosen from a set of options including:

[0302] ○ First option, which consists of the first NZP CSI-RS resource in the first group;

[0303] ○ The second option, which consists of the second NZP CSI-RS resource in the second group; and

[0304] ○ A third option, comprising the first NZP CSI-RS resource in the first group and the second NZP CSI-RS resource in the second group; and

[0305] • Indication of one or more NZP CSI-RS resources selected.

[0306] Example 26: According to the method described in Example 25, the first group of one or more NZP CSI-RS resources and the second group of one or more NZP CSI-RS resources correspond to the first NZP CSI-RS resource set and the second NZP CSI-RS resource set, respectively.

[0307] Example 27: According to the method described in Example 26, the first NZP CSI-RS resource set and the second NZP CSI-RS resource set are configured in two CSI resource settings included in the CSI report configuration.

[0308] Example 28: According to the method of Example 26, the first NZP CSI-RS resource set and the second NZP CSI-RS resource set are included in a single CSI resource setting, which is included in the CSI report configuration.

[0309] Example 29: According to the method of Example 28, the first NZP CSI-RS resource set and the second NZP CSI-RS resource set included in the single CSI resource setting are configured in a non-periodic CSI triggering state associated with the CSI report configuration.

[0310] Example 30: According to the method described in Example 29, the non-periodic CSI trigger state further includes a first quasi-cooperative positioning QCL indication and a second QCL indication for the first NZP CSI-RS resource set and the second NZP CSI-RS resource set, respectively.

[0311] Example 31: According to the method of Example 25, the first group of one or more NZP CSI-RS resources and the second group of one or more NZP CSI-RS resources are included in a single NZP CSI-RS resource set.

[0312] Example 32: According to the method of Example 31, wherein the first group of one or more NZP CSI-RS resources or the second group of one or more NZP CSI-RS resources is identified by an index included in each NZP CSI-RS resource configuration.

[0313] Example 33: According to the method described in Example 32, the index may be one of the following: an index of the Transmission Configuration Indicator (TCI); or a control resource pool index; or a new group index.

[0314] Example 34: The method according to any one of Examples 25 to 33, wherein the selected one or more NZP CSI-RS resources include the first NZP CSI resource or the second NZP CSI resource, and the CSI based on the selected one or more NZP CSI-RS resources includes one or more of the following: (a) Rank indicator RI; (b) Precoding matrix indicator PMI; (c) Channel quality indicator CQI; (d) Layer-1 Received Reference Signal Power L1-RSRP; (e) Layer-1 Signal-to-Interference-Noise Ratio L1-SINR; (f) NZP CSI-RS resource indicator CRI; (g) NZP CSI-RS resource group indicator CRGI; or (h) any combination of two or more of (a) to (g).

[0315] Example 35: The method according to any one of Examples 25 to 33, wherein the selected one or more NZP CSI-RS resources include the first NZP CSI-RS resource and the second NZP CSI-RS resource, and the CSI based on the selected one or more NZP CSI-RS resources includes a first NZP CSI-RS resource indicator (CRI1) and a second NZP CSI-RS resource indicator (CRI2), and respectively associated with a first rank indicator (RI1) and a second rank indicator (RI2), a first precoding matrix indicator (PMI1) and a second precoding matrix indicator (PMI2), and a joint channel quality indicator (CQI).

[0316] Example 36: The method according to any one of Examples 25 to 33, wherein the selected one or more NZP CSI-RS resources include the first NZP CSI-RS resource and the second NZP CSI-RS resource, and the CSI based on the selected one or more NZP CSI-RS resources includes a first NZP CSI-RS resource indicator (CRI1) and a second NZP CSI-RS resource indicator (CRI2), and respectively associated with a first rank indicator (RI1) and a second rank indicator (RI2), a first precoding matrix indicator (PMI1) and a second precoding matrix indicator (PMI2), and a first channel quality indicator (CQI) and a second channel quality indicator (CQI2).

[0317] Example 37: The method according to any one of Examples 35 to 36, wherein the CSI is calculated by assuming that noncoherent joint transmission JC-JT of Physical Downlink Shared Channel (PDSCH) is performed on the antenna ports configured in both the first NZP CSI-RS resource and the second NZP CSI-RS resource on the same time and frequency resources.

[0318] Example 38: The method according to any one of Examples 25 to 33, wherein the CSI based on one or more selected NZP CSI-RS resources includes a first NZP CSI-RS resource indicator (CRI1) and a second NZP CSI-RS resource indicator (CRI2), and a first RSRP and a second RSRP or a first SINR and a second SINR respectively associated.

[0319] Example 39: The method described in Examples 34 to 38, wherein CRI1, CRI2, and / or CRGI can be jointly encoded.

[0320] Example 40: The method according to Examples 34 to 38, wherein the indication of the selected one or more NZP CSI-RS resources includes RI = 0 for the second NZP CSI-RS resource (or the first NZP CSI-RS resource).

[0321] Example 41: The method according to any one of Examples 25 to 40, wherein the CSI report configuration further includes a codebook configuration.

[0322] Example 42: The method according to any one of Examples 25 to 41, wherein the CSI report configuration further includes a report volume indicator that indicates CSI reporting for NC-JT.

[0323] Example 43: The method according to Examples 25 to 41, wherein the report quantity indicator may also indicate whether the CSI report includes a combined CQI or a pair of CQIs.

[0324] Example 44: The method according to Examples 25 to 41, wherein the CSI report configuration further includes one or more CSI interference measurement CSI-IM resources.

[0325] Example 45: A method performed by a base station, the method comprising one or more of the following: providing a configuration of a non-zero power CSI reference signal (NZP) CSI-RS resource set to a wireless communication device, the configuration including a list of NZP CSI-RS resource tuples, each NZP CSI-RS resource tuple including one or more NZP CSI-RS resources; providing the wireless communication device with a CSI report configuration including the NZP CSI-RS resource set for channel measurement; and receiving from the wireless communication device a CSI based on the determined NZP CSI-RS resource tuples and an indication of the determined NZP CSI-RS resource tuples.

[0326] Example 46: The method according to Example 45, wherein the CSI includes an NZP CSI-RS resource tuple indicator CRTI, and one or more of the RI and PMI, L1-RSRP, or L1-SINR for each NZP CSI-RS resource in the tuple, as well as a combined CQI.

[0327] Example 47: The method according to any one of the foregoing embodiments further includes: obtaining user data; and forwarding the user data to a host computer or a wireless device.

[0328] Group C Implementation Examples

[0329] Example 48. A wireless device comprising: a processing circuit configured to perform any one of the steps in any one of the embodiments in Group A; and a power supply circuit configured to supply power to the wireless device.

[0330] Example 49. A base station, the base station comprising: a processing circuit configured to perform any one of the steps in any one of the embodiments in Group B; and a power supply circuit configured to supply power to the base station.

[0331] Example 50. A user equipment (UE) comprising: an antenna configured to transmit and receive radio signals; a radio front-end circuit connected to the antenna and connected to a processing circuit, and configured to modulate signals transmitted between the antenna and the processing circuit; the processing circuit configured to perform any one of the steps in any one of the embodiments in Group A; an input interface connected to the processing circuit and configured to allow information to be input into the UE for processing by the processing circuit; an output interface connected to the processing circuit and configured to output information processed by the processing circuit from the UE; and a battery connected to the processing circuit and configured to supply power to the UE.

[0332] Example 51. A communication system including a host computer, comprising: processing circuitry configured to provide user data; and a communication interface configured to forward the user data to a cellular network for transmission to a user equipment (UE); wherein the cellular network includes a base station having a radio interface and processing circuitry, the processing circuitry of the base station being configured to perform any one of the steps in any one of the embodiments in Group B.

[0333] Example 52. The communication system according to the foregoing embodiments further includes a base station.

[0334] Example 53. The communication system according to the preceding two examples further includes the UE, wherein the UE is configured to communicate with the base station.

[0335] Example 54. A communication system according to the preceding three examples, wherein: the processing circuit of the host computer is configured to execute a host application to provide the user data; and the UE includes processing circuitry configured to execute a client application associated with the host application.

[0336] Example 55. A method implemented in a communication system including a host computer, a base station, and a user equipment (UE), the method comprising: providing user data at the host computer; and initiating a transmission carrying the user data to the UE via a cellular network including the base station at the host computer, wherein the base station performs any one of the steps in any one of the embodiments in Group B.

[0337] Example 56. The method according to the foregoing embodiments further includes transmitting the user data at the base station.

[0338] Example 57. The method according to the preceding two examples, wherein the user data is provided at the host computer by executing a host application, the method further comprising executing a client application associated with the host application at the UE.

[0339] Example 58. A user equipment (UE) configured to communicate with a base station, the UE including a radio interface and processing circuitry configured to perform the methods described in the first three examples.

[0340] Example 59. A communication system including a host computer, comprising: processing circuitry configured to provide user data; and a communication interface configured to forward the user data to a cellular network for transmission to a user equipment (UE); wherein the UE includes a radio interface and processing circuitry, and components of the UE are configured to perform any one of the steps in any one of the embodiments in Group A.

[0341] Example 60. The communication system according to the foregoing embodiments, wherein the cellular network further includes a base station configured to communicate with the UE.

[0342] Example 61. A communication system according to the preceding two examples, wherein: the processing circuit of the host computer is configured to execute a host application to provide the user data; and the processing circuit of the UE is configured to execute a client application associated with the host application.

[0343] Example 62. A method implemented in a communication system including a host computer, a base station, and a user equipment (UE), the method comprising: providing user data at the host computer; and initiating a transmission carrying the user data to the UE via a cellular network including the base station at the host computer, wherein the UE performs any one of the steps in any one of the embodiments in Group A.

[0344] Example 63. The method according to the foregoing embodiments further includes receiving the user data from the base station at the UE.

[0345] Example 64. A communication system including a host computer, comprising: a communication interface configured to receive user data transmitted from a user equipment (UE) to a base station; wherein the UE includes a radio interface and processing circuitry configured to perform any one of the steps in any one of the embodiments in Group A.

[0346] Example 65. The communication system according to the foregoing embodiments further includes the UE.

[0347] Example 66. The communication system according to the preceding two examples further includes the base station, wherein the base station includes a radio interface configured to communicate with the UE and a communication interface configured to forward the user data carried by the transmission from the UE to the base station to the host computer.

[0348] Example 67. A communication system according to the preceding three examples, wherein: the processing circuit of the host computer is configured to execute a host application; and the processing circuit of the UE is configured to execute a client application associated with the host application, thereby providing the user data.

[0349] Example 68. A communication system according to the preceding four examples, wherein: the processing circuit of the host computer is configured to execute a host application to provide requested data; and the processing circuit of the UE is configured to execute a client application associated with the host application to provide the user data in response to the requested data.

[0350] Example 69. A method implemented in a communication system including a host computer, a base station, and a user equipment (UE), the method comprising: at the host computer, receiving user data transmitted from the UE to the base station, wherein the UE performs any one of the steps in any one of the embodiments in Group A.

[0351] Example 70. The method according to the foregoing embodiments further includes providing the user data to the base station at the UE.

[0352] Example 71. The method according to the preceding two examples further includes: at the UE, executing a client application to provide the user data to be transmitted; and at the host computer, executing a host application associated with the client application.

[0353] Example 72. The method according to the preceding three examples further includes: executing a client application at the UE; and receiving input data of the client application at the UE, the input data being provided at the host computer by executing a host application associated with the client application; wherein the user data to be transmitted is provided by the client application in response to the input data.

[0354] Example 73. A communication system including a host computer, the host computer including a communication interface configured to receive user data originating from a transmission from a user equipment (UE) to a base station, wherein the base station includes a radio interface and processing circuitry configured to perform any one of the steps in any one of the embodiments in Group B.

[0355] Example 74. The communication system according to the foregoing embodiments further includes the base station.

[0356] Example 75. The communication system according to the preceding two examples further includes the UE, wherein the UE is configured to communicate with the base station.

[0357] Example 76. A communication system according to the preceding three examples, wherein: the processing circuitry of the host computer is configured to execute a host application; and the UE is configured to execute a client application associated with the host application, thereby providing the user data to be received by the host computer.

[0358] Example 77. A method implemented in a communication system including a host computer, a base station, and a user equipment (UE), the method comprising: at the host computer, receiving from the base station user data transmitted from the base station that has been received by the base station from the UE, wherein the UE performs any one of the steps in any one of the embodiments in Group A.

[0359] Example 78. The method according to the foregoing embodiments further includes receiving the user data from the UE at the base station.

[0360] Example 79. The method according to the preceding two examples further includes initiating the transmission of received user data to the host computer at the base station.

[0361] At least some of the following abbreviations may be used in this disclosure. If there is inconsistency between the abbreviations, preference should be given to how they are used above. If listed multiple times below, the first listing should be preferred over any subsequent listing(s).

[0362] • 3GPP Third Generation Partnership Project

[0363] • 5G (Fifth Generation)

[0364] • 5GC fifth-generation core

[0365] • 5GS Fifth Generation System

[0366] • AF Application Functions

[0367] • AMF Access and Mobility Functions

[0368] • AN access network

[0369] • AP Access Point

[0370] • ASIC (Application-Specific Integrated Circuit)

[0371] • AUSF Authentication Server Functionality

[0372] • CPU (Central Processing Unit)

[0373] • DN Data Network

[0374] • DSP Digital Signal Processor

[0375] • eNB Enhanced or Evolved Node B

[0376] • EPS Evolution Grouping System

[0377] • E-UTRA Evolution Universal Terrestrial Radio Access

[0378] • FPGA (Field Programmable Gate Array)

[0379] • gNB New Radio Base Station

[0380] • gNB-DU New Radio Base Station Distributed Unit

[0381] • HSS (Home Subscriber Server)

[0382] • IoT (Internet of Things)

[0383] • IP Internet Protocol

[0384] • LTE Long Term Evolution

[0385] • MME (Mobility Management Entity)

[0386] • MTC Machine Type Communication

[0387] • NEF Network Open Functionality

[0388] • NF Network Functions

[0389] • NR New Radio

[0390] • NRF Network Functions Storage Function

[0391] • NSSF network slice selection function

[0392] • OTT over-the-top

[0393] PC (Personal Computer)

[0394] • PCF policy control function

[0395] • P-GW Packet Data Network Gateway

[0396] • QoS (Quality of Service)

[0397] • RAM (Random Access Memory)

[0398] • RAN Radio Access Network

[0399] • ROM (Read-Only Memory)

[0400] • RRH Remote Radio Header

[0401] • RTT round trip time

[0402] • SCEF service capability exposure function

[0403] • SMF Session Management Function

[0404] • UDM Unified Data Management

[0405] • UE (User Equipment)

[0406] • UPF User Plane Functions

[0407] Those skilled in the art will recognize improvements and modifications to the embodiments of this disclosure. All such improvements and modifications are considered to be within the scope of the concepts disclosed herein.

Claims

1. A method for reporting Channel State Information (CSI) in a wireless network, performed by a wireless communication device (712), the method comprising: • Receive (1400) CSI report configuration, the CSI report configuration including: A first group of one or more non-zero power CSI reference signal NZP CSI-RS resources for channel measurement and a second group of one or more NZP CSI-RS resources for channel measurement; • Select (1402) a first NZP CSI-RS resource and a second NZP CSI-RS resource from the first group and the second group of NZP CSI-RS resources, respectively, wherein the CSI based on the selected first NZP CSI-RS resource and the second NZP CSI-RS resource includes: a first NZP CSI-RS resource indicator (CRI1) and a second NZP CSI-RS resource indicator (CRI2), and respectively associated with a first rank indicator (RI1) and a second rank indicator (RI2), a first precoding matrix indicator (PMI1) and a second precoding matrix indicator (PMI2), and a joint channel quality indicator (CQI), and wherein the indicator of the selected one or more NZP CSI-RS resources includes RI = 0 for either the second NZP CSI-RS resource or the first NZP CSI-RS resource; and • Report (1404) the CSI based on the first NZP CSI-RS resource and the second NZP CSI-RS resource to the network node. The first group of one or more NZP CSI-RS resources and the second group of one or more NZP CSI-RS resources are included in a single NZP CSI-RS resource set.

2. The method according to claim 1, wherein, The CSI is the CSI corresponding to the noncoherent joint transmission NC-JT associated with the selected first NZP CSI-RS resource and the second NZP CSI-RS resource.

3. The method according to any one of claims 1 to 2, wherein, Selecting (1402) the first NZP CSI-RS resource and / or the second NZP CSI-RS resource includes selecting (1402) the first NZP CSI-RS resource and / or the second NZP CSI-RS resource based on a predetermined metric.

4. The method according to claim 3, wherein, The metric is downlink throughput.

5. The method according to any one of claims 1 to 2, wherein, The CSI based on the selected first NZP CSI-RS resource and / or second NZP CSI-RS resource includes: a. Layer 1 reference signal received power L1-RSRP for each selected NZP CSI-RS resource; b. Layer 1 signal-to-interference-to-noise ratio (L1-SINR) for each selected NZP CSI-RS resource; c. The NZP CSI-RS Resource Indicator (CRI) for each selected NZP CSI-RS resource; or d. Any combination of two or more of (a) to (c).

6. The method according to claim 1, wherein, The CSI is calculated by NC-JT of Physical Downlink Shared Channel (PDSCH) on the antenna ports of the first NZPCSI-RS resource and the second NZP CSI-RS resource, assuming the same time and frequency resources.

7. The method according to any one of claims 1 to 2, wherein, Selecting (1402) the first NZP CSI-RS resource and / or the second NZP CSI-RS resource includes selecting (1402) the first NZP CSI-RS resource and the second NZP CSI-RS resource, and the CSI based on the selected first NZP CSI-RS resource and the second NZP CSI-RS resource includes: a first NZP CSI-RS resource indicator (CRI1) and a second NZP CSI-RS resource indicator (CRI2), and a first RSRP and a second RSRP or a first SINR and a second SINR respectively associated.

8. The method according to claim 5, wherein, Perform joint encoding of CRI1 and / or CRI2.

9. The method according to any one of claims 1 to 2, wherein, The CSI report configuration also includes codebook configuration.

10. The method according to any one of claims 1 to 2, wherein, The CSI reporting configuration also includes one or more CSI interference measurement CSI-IM resources.

11. A wireless communication device (712) for reporting channel state information (CSI) in a wireless network, the wireless communication device (712) being adapted to perform the method according to any one of claims 1-10.

12. A wireless communication device (712) for reporting Channel State Information (CSI) in a wireless network, the wireless communication device (712) comprising: • One or more transmitters (1808); • One or more receivers (1810); as well as • A processing circuit (1802) associated with the one or more transmitters (1808) and the one or more receivers (1810), the processing circuit (1802) being configured to cause the wireless communication device (712) to perform the method according to any one of claims 1-10.

13. A method performed by a network node, the method comprising: • Provide a (1400) CSI report configuration to the wireless communication device (712), the CSI report configuration including: A first group of one or more non-zero power CSI reference signal NZP CSI-RS resources used for channel measurement and a second group of one or more NZP CSI-RS resources used for channel measurement; and • Receive (1404) from the wireless communication device (712) information including CSI based on one or more selected NZP CSI-RS resources, wherein the selected one or more NZP CSI-RS resources include first NZP CSI-RS resources and second NZP CSI-RS resources in the first group and the second group of NZP CSI-RS resources, wherein the CSI based on the selected first NZP CSI-RS resources and second NZP CSI-RS resources includes: a first NZP CSI-RS resource indicator (CRI1) and a second NZP CSI-RS resource indicator (CRI2), and respectively associated with a first rank indicator (RI1) and a second rank indicator (RI2), a first precoding matrix indicator (PMI1) and a second precoding matrix indicator (PMI2), and a joint channel quality indicator (CQI), and wherein the indicator of the selected one or more NZP CSI-RS resources includes RI = 0 for either the second NZP CSI-RS resource or the first NZP CSI-RS resource. The first group of one or more NZP CSI-RS resources and the second group of one or more NZP CSI-RS resources are included in a single NZP CSI-RS resource set.

14. The method according to claim 13, wherein, The reported information also includes indications of the selected first NZP CSI-RS resource and the second NZP CSI-RS resource.

15. The method according to any one of claims 13 to 14, wherein, The CSI, based on one or more selected NZPCSI-RS resources, includes: a. Layer 1 reference signal received power L1-RSRP for each selected NZP CSI-RS resource; b. Layer 1 signal-to-interference-to-noise ratio (L1-SINR) for each selected NZP CSI-RS resource; c. The NZP CSI-RS Resource Indicator (CRI) for each selected NZP CSI-RS resource; or d. Any combination of two or more of (a) to (c).

16. The method according to claim 15, wherein, Perform joint encoding of CRI1 and / or CRI2.

17. The method according to any one of claims 13 to 14, wherein, The CSI report configuration also includes codebook configuration.

18. The method according to any one of claims 13 to 14, wherein, The CSI reporting configuration also includes one or more CSI interference measurement CSI-IM resources.

19. A network node adapted to perform the method according to any one of claims 13-18.

20. A network node including processing circuitry (1504; 1604), said processing circuitry (1504; 1604) being configured to cause said network node to perform the method according to any one of claims 13-18.

21. A computer program product comprising a computer program, When the computer program is run on the processor of the wireless communication device, it configures the processor to perform the method according to any one of claims 1-10; or When the computer program is run on a processor of a network node, the processor is configured to perform the method according to any one of claims 13-18.

22. A computer-readable medium comprising a computer program, When the computer program is run on the processor of the wireless communication device, it configures the processor to perform the method according to any one of claims 1-10; or When the computer program is run on a processor of a network node, the processor is configured to perform the method according to any one of claims 13-18.

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