CRI based CSI enhancement to support hybrid beamforming
CRI-based CSI enhancements support hybrid beamforming by configuring a subset of CSI-RS resources and managing CSI feedback, addressing the limitation of 32 CSI-RS ports in 5G NR, enhancing CSI reporting for up to 128 ports and optimizing hybrid beamforming in 5G networks.
Patent Information
- Application Number
- PCT/CN2024/110485
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-08-07
- Publication Date
- 2026-02-12
AI Technical Summary
Current 5G New Radio (NR) specifications support up to 32 CSI-RS ports for hybrid beamforming, which is insufficient for future deployments requiring up to 128 CSI-RS ports, necessitating enhancements in channel state information (CSI) reporting to support hybrid beamforming effectively.
Implement CRI-based CSI enhancements that allow network configuration of a subset of CSI-RS resources for reporting, with restrictions on MR CSI-RS resources to manage CSI feedback, including explicit or implicit selection and IMR resource configurations, and UCI assembly rules to handle varying payload sizes.
Enables efficient CSI reporting for up to 128 CSI-RS ports, optimizing hybrid beamforming by reducing processing overhead and ensuring reliable data transmission in 5G networks.
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Figure CN2024110485_12022026_PF_FP_ABST
Abstract
Description
CRI based CSI Enhancement to Support Hybrid BeamformingBackground
[0001] Hybrid beamforming combines analog and digital beamforming to achieve a tradeoff between the low power of analog beamforming and the flexibility of digital beamforming. Hybrid beamforming may include two transmit steps including semi-static (analog) beamforming, in which multiple antenna elements of an antenna array map to one digital port and the beam pattern transmitted by these antenna elements is periodically adapted, and dynamic digital beamforming, in which the precoder is dynamically changed across the digital ports.
[0002] Currently, 5G New Radio (NR) specifications support a maximum of 32 channel state information (CSI) reference signal (CSI-RS) ports for the downlink (DL) CSI codebook. Future releases of NR specifications may support, for hybrid beamforming, up to 128 CSI-RS ports across all CSI-RS resources with up to 32 CSI-RS ports per resource.Summary
[0003] Some example embodiments are related to an apparatus having processing circuitry configured to process, based on signals received from a cell of a network, a configuration for channel state information (CSI) reporting including a CSI reference signal (CSI-RS) resource set comprising KS CSI-RS resources, an indication of M CSI-RS resources of the CSI-RS resource set to be included in a CSI report, an indication of MR CSI-RS resources of the CSI-RS resource set for which CSI feedback is to be generated, and a codebook type for the CSI report, measure CSI-RS transmitted in each of the KS CSI-RS resources including the MR CSI-RS resources and remaining (KS-MR) CSI-RS resources to determine CSI of each of the KS CSI-RS resources and generate CSI feedback for each of the MR CSI-RS resources regardless of the RSRP determined for the different beams and CSI feedback for each of the (M-MR) CSI-RS resources that are selected for reporting.
[0004] Other example embodiments are related to a method for processing, based on signals received from a cell of a network, a configuration for channel state information (CSI) reporting including a CSI reference signal (CSI-RS) resource set comprising KS CSI-RS resources, an indication of M CSI-RS resources of the CSI-RS resource set to be included in a CSI report, an indication of MR CSI-RS resources of the CSI-RS resource set for which CSI feedback is to be generated, and a codebook type for the CSI report, measuring CSI-RS transmitted in each of the KS CSI-RS resources including the MR CSI-RS resources and remaining (KS-MR) CSI-RS resources to determine CSI of each of the KS CSI-RS resources and generating CSI feedback for each of the MR CSI-RS resources regardless of the RSRP determined for the different beams and CSI feedback for each of the (M-MR) CSI-RS resources that are selected for reporting.Brief Description of the Drawings
[0005] Fig. 1a shows a diagram including four example antenna modules and their corresponding radiation patterns according to one example.
[0006] Fig. 1b shows a diagram of a digital beamforming architecture according to one example.
[0007] Fig. 1c shows a diagram of a hybrid beamforming architecture according to one example.
[0008] Fig. 2 shows a diagram for hybrid beamforming according to various example embodiments.
[0009] Fig. 3 shows a table for assembling CSI feedback for the Rel-15 Type-I SP codebook (subband) and the Rel-16 eType-II codebook according to existing specification.
[0010] Fig. 4a shows a diagram for assembling CSI feedback for M sets of RI / CQI / PMI / LI according to one option of these example embodiments.
[0011] Fig. 4b shows a diagram for assembling CSI feedback for M sets of RI / CQI / PMI / LI according to another option of these example embodiments.
[0012] Fig. 5 shows a diagram for assembling CSI feedback in CSI Part 1 for M sets of RI / CQI / PMI / LI according to various example embodiments.
[0013] Fig. 6a shows a diagram for assembling CSI feedback in CSI Part 2 for M sets of RI / CQI / PMI / LI according to one option of these example embodiments.
[0014] Fig. 6b shows a diagram for assembling CSI feedback in CSI Part 2 for M sets of RI / CQI / PMI / LI according to another option of these example embodiments.
[0015] Fig. 7 shows an example network arrangement according to various example embodiments.
[0016] Fig. 8 shows an example user equipment (UE) according to various example embodiments.
[0017] Fig. 9 shows an example base station according to various example embodiments.Detailed Description
[0018] The example embodiments may be further understood with reference to the following description and the related appended drawings, wherein like elements are provided with the same reference numerals. The example embodiments relate to operations for supporting channel state information (CSI) reporting enhancements. In particular, the example embodiments relate to CSI reference signal (CSI-RS) resource indicator (CRI) based CSI enhancements to support hybrid beamforming for up to 128 CSI-RS ports. The CRI-based CRI enhancements may include support a network configuration of a subset of CSI-RS resources to be selected for CSI reporting.
[0019] The example embodiments are described with regard to a user equipment (UE) . However, reference to a UE is merely provided for illustrative purposes. The example embodiments may be utilized with any electronic component that may establish a connection to a network and is configured with the hardware, software, and / or firmware to exchange signaling and / or data with the network. Therefore, the UE as described herein is used to represent any electronic component.
[0020] The example embodiments are also described with reference to a 5G New Radio (NR) network. However, reference to a 5G NR network is merely provided for illustrative purposes. The example embodiments may be utilized with any network implementing CSI reporting functionalities similar to those described herein, e.g., 5G-Advanced network, 6G network, etc. Therefore, the 5G NR network as described herein may represent any type of network implementing CSI reporting functionalities similar to the 5G NR network.
[0021] Beamforming refers to an antenna technique that may be used to propagate a directional signal, e.g., over a sub-6 GHz or mmWave frequency band. Throughout this description, the term “beam” may refer to a beamformed signal. However, reference to a beam is merely an example. Di fferent networks may refer to a beamformed signal by a different name. To generate a beam, a plurality of antenna elements may be configured to radiate the same signal. Increasing a number of antenna elements of a plurality that radiate the (e.g., same) signal may decrease the width of a signal radiation pattern and increase an antenna’s effective gain.
[0022] Fig. 1a shows a diagram 100 including four example antenna modules 110, 120, 130, 140 and their corresponding radiation patterns 112, 122, 132, 142 according to one example. A first antenna module 110 includes a single antenna element 111 and generates the radiation pattern 112. A second antenna module 120 includes two antenna elements 121 and generates the radiation pattern 122. A third antenna module 130 includes four antenna elements 131 and generates the radiation pattern 132. A fourth antenna module 140 includes eight antenna elements 141 and generates the radiation pattern 142. A comparison of the radiation patterns 112, 122, 132, 142 illustrates the effects the number of antenna elements has on the geometry of the radiation pattern.
[0023] For instance, in this example, the radiation pattern 112 is the widest radiation pattern because the first antenna module 110 has the fewest number of antenna elements (e.g., one) . The radiation pattern 122 generated by the second antenna module 120 is narrower than the radiation pattern 112. The radiation pattern 132 generated by the third antenna module 130 is narrower than the radiation pattern 122. The radiation pattern 142 generated by the fourth antenna module 140 is narrower than the radiation pattern 132. The fourth antenna module 140 has the most antenna elements and is able to generate the narrowest radiation pattern 142. The size of the beams 112, 122, 132, 142 illustrated in Fig. 1a is provided for illustrative purposes only to show the narrowing of the beam generated using an increasing number of antenna elements per panel.
[0024] A base station may perform one or more transmitter (Tx) beam sweeps. The transmitter beam sweep refers to transmitting a plurality of transmitter beams over particular spatial areas during a predetermined duration. Each beam transmitted during a transmitter beam sweep may include one or more reference signals (RS) . The UE may measure the transmitter beams (e.g., receiver (Rx) beam sweep) based on the respective RS. In various examples, the base station may transmit 1, 2, 4, 8, 16 or 32 beams in a Tx beam sweep. The beam sweep may be a wideband beam sweep in which the beam occupies a broad frequency spectrum or a narrowband beam sweep in which the beam occupies a small portion of the frequency spectrum.
[0025] CSI reporting may be configured for a UE by a network cell. The CSI report configuration may include a field for a CSI report type, e.g., periodic, semi-persistent or aperiodic, and fields for measurement resources, e.g., channel measurement resources (CMR) and (optional) interference measurement resources (IMR) . The measurement resources may be used by the UE for performing channel measurements on RS such as non-zero-power CSI-RS (NZP-CSI-RS) , synchronization signal block (SSB) or CSI-IM.
[0026] The CSI-ReportConfig may configure three possible types of measurement resources: a CMR; a zero-power IMR (ZP-IMR) ; and a non-zero-power NZP IMR (NZP-IMR) . The CMR is always configured and is associated with a first CSI-RS resource. The ZP-IMR is optionally configured and is associated with a second CSI-RS resource. The NZP-IMR is optionally configured and is associated with a third CSI-RS resource. The CSI-ResourceConfig defines a group of one or more CMR resources, ZP-IMR resources, or NZP-IMR resources.
[0027] The CSI-ResourceConfig may configure: a CMR resource set; a ZP-IMR resource set; or an NZP-IMR resource set. The CSI-ResourceConfig further includes a field for a BWP ID on which to perform the CSI measurements and a field for the time domain behavior of the resource configuration (resourceType) , e.g., aperiodic, semi-persistent or periodic.
[0028] The downlink (DL) CSI codebook was introduced in NR Rel-15. Four codebook types are supported in Rel-15 including a Type I Single-Panel Codebook ( “type I-SinglePanel” ) , a Type I Multi-Panel Codebook ( “type I-MultiPanel” ) , a Type II Codebook (“typeII” ) and Type II Port Selection Codebook ( “typeII-PortSelection” ) . In Rel-16, the Type II codebook is enhanced for overhead reduction by spatial domain discrete Fourier transform (DFT) basis, including an Enhanced Type II Codebook (“typeII-r16” ) and an Enhanced Type II Port Selection Codebook (“TypeII-PortSelection-r16” ) . In Rel-17, the Type II port selection codebook is further enhanced for channel with partial reciprocity, including a further enhanced Type II port selection codebook ( “typeII-PortSelection-r17” ) . In Rel-18, the Type II codebook is enhanced for CJT (Coherent Joint Transmission) with up to 4 TRPs, including enhancement based on both “typeII-r16” and “typeII-PortSelection-r17” and the Type II codebook is further enhanced for CSI prediction with time domain compression of multiple PMI by spatial / Doppler domain DFT basis, including enhancement based on both “typeII-r16” and “typeII-PortSelection-r17” .
[0029] The UE may use a channel state information reference signal (CSI-RS) to measure CSI feedback and generate a CSI report. When multiple CSI-RS resources are configured in a CSI-RS resource set, the network may configure the UE to report CSI feedback for one or more of the strongest beams. Upon receiving the CSI report, a network cell may schedule data transmission in a DL direction. In 3GPP 5G NR specifications, CSI is reported by a UE to a gNB and may include some or all of the following information: one or more CSI-RS resource index (CRI) , one or more Rank Indicator (RI) , one or more Precoder Matrix Indicator (PMI) , a Layer Indicator (LI) , and / or a Channel Quality Indicator (CQI) . It is noted that LI is reported only if applicable, e.g., if the RI>1, and all references to LI in the following description should be construed as “LI (if applicable) . ” The CSI may be reported as uplink (UL) control information (UCI) by a Physical Uplink Shared Channel (PUSCH) , a short Physical Uplink Control Channel (PUCCH) or a long PUCCH.
[0030] According to current specification, a type-II MIMO codebook may be based on a W1*W2*Wf structure where W1 represents a spatial basis, Wf represents a frequency basis and W2 represents a linear combination coefficient matrix. For Rel-18 NR MIMO evolution, UE-side CSI prediction is supported by Type II codebook enhancement with codebook structure where W1 is the spatial basis selection matrix; Wf is the frequency basis selection matrix; Wd is the time / Doppler basis selection matrix; and W2 is the linear combination coefficient matrix. The W2 term may be based on PMI reporting components related to the spatial basis, the frequency basis and the time / Doppler basis.
[0031] According to current specification, a CSI report may include one or more PMIs. Each PMI may explicitly or implicitly indicate a UE preferred precoder based on the type II codebook structure (s) described above. For example, the PMI may include a spatial component corresponding to the spatial basis of the UE preferred precoder (e.g., W1) , a frequency component corresponding to the frequency basis the UE preferred precoder (e.g., Wf) , a time / Doppler component corresponding to the time / Doppler basis of the UE preferred precoder (e.g., Wd) and a linear combination coefficient component corresponding to the combination coefficient of the UE preferred precoder (e.g., W2) . Each component of the PMI may be associated with one or more parameters that are identified by a codebook index hard encoded in the 3GPP Specifications. There are various different types of codebook indices mapped to a variety of different formulas and tables in the 3GPP Specifications and these codebook indices may be used in the manner in which they are defined in the 3GPP Specifications.
[0032] Current speci fication supports DL CSI (PMI) codebook for up to 32 ports, due to NR supporting a maximum 32 CSI-RS ports. It is already possible to deploy more than 32 antenna elements, especially for mid and high frequency band, however, NR only supports maximum 32 CSI-RS ports (RF chains) for DL CSI acquisition and MIMO operation. The network may perform a mapping of transparent antenna elements to CSI-RS ports by hybrid beamforming.
[0033] Fig. 1b shows a diagram 150 of a digital beamforming architecture according to one example. The beamforming architecture includes eight (8) antenna elements 152 that each map to a respective TRx chain, e.g., eight antenna elements 152 map to eight TRx chains. The eight TRx chains may be processed by a baseband processor 154.
[0034] Fig. 1c shows a diagram 160 of a hybrid beamforming architecture according to one example. The hybrid beamforming architecture includes eight (8) antenna elements 162. In this example, two antenna elements 162 may map to a single TRx chain, e.g., eight antenna elements 162 map to four TRx chains. The four TRx chains may be processed by a baseband processor 164.
[0035] Hybrid beamforming comprises two Tx steps for DL sounding, including 1) semi-static beamforming and 2) dynamic digital beamforming. The semi-static beamforming may comprise multiple antenna elements mapping to one digital port. The network may use semi-static beamforming to sweep in multiple directions, e.g., four directions, to improve the coverage. In semi-static beamforming, the pattern and direction of the beams are chosen adaptively. The dynamic digital beamforming may comprise dynamically changing the precoder across the digital ports to improve the coverage and throughput.
[0036] Fig. 2 shows a diagram 200 for hybrid beamforming according to various example embodiments. The diagram 200 includes a digital beamforming module 210 and an analog beamforming module 220. The digital beamforming module 210 includes a number N of digital ports 211 , e.g., digital ports 181a-181N. The analog beamforming module 220includes a number N of antenna modules 191 (e.g., physical ports) , e.g., antenna modules 191a-191N. In one example, N=32. Each of the antenna modules 191 includes a group of four antenna elements 192. Accordingly, four antenna elements 192 are mapped to each digital port 181. Thus, in this example, the analog beamforming module 190 includes 128 antenna elements. Each antenna module 191 may transmit a different beam 193 in multiple directions. In this example, the antenna modules 191a-N each transmit a respective beam 193 (e.g., beams 193a-N) in multiple directions.
[0037] The hybrid beamforming architecture could transmit, e.g., a single CSI-RS resource across all digital ports 181 (e.g., a 32-port CSI-RS resource) , two CSI-RS resources across the digital ports 181 (e.g., two 16-port CSI-RS resources) , four CSI-RS resources across digital ports 181 (e.g., four 8-port CSI-RS resources) , etc.
[0038] The UE may be configured with a resource set comprising multiple NZP-CSI-RS resources. Each CSI-RS resource may be associated with a respective CSI-RS resource indicator (CRI) . CRI-based CSI reporting may be enabled when multiple CSI-RS resources are included in a Tx beamsweep. The UE may select one or more of the best beams (e.g., the CSI-RS having the strongest reference signal received power (RSRP) and then feedback, for each selected beam, the best precoder (RI / PMI / CQI / LI) .
[0039] In Rel-19 MIMO evolution it was agreed to support hybrid beamforming supporting up to a total of 128 CSI-RS ports, targeting FR1. In one obj ective, CRI-based CSI reporting (CQI / PMI / RI / LI calculated per CRI for ≥1) is to be extended for hybrid beamforming supporting up to a total of 128 CSI-RS ports (antenna elements) across all resources, with up to 32 digital CSI-RS ports per CSI-RS resource, without a new codebook design.
[0040] As described above, the CSI-RS resources for each beam, e.g., the CSI-RS resource set, are configured in CSI-ResourceConfig. The number of CSI-RS resources configured in a CSI-RS resource set may be referred to as “KS” herein, e.g., KS=4, KS=8, etc. The network may additionally configure the UE to report measurements for a number M≥1 of CSI-RS resources (beams) that is a subset of KS, e.g., M=2, M=3, etc. Typically, the UE is free to select the strongest M beams for reporting CSI feedback.
[0041] For future 3GPP releases, it was agreed to support a network configuration of the UE that identifies a number MR≥0of CSI-RS resources that is less than or equal to M, e.g., a further subset of the KS CSI-RS resources. In some aspects, the MR term may be considered as functioning to identify specific resources for which the UE must generate and report CSI feedback, e.g., the corresponding RI / CQI / PMI / LI for those beams. In some aspects, as will be described in further detail below, the MR term may be more appropriately considered as a network request, e.g., in some embodiments, the UE may determine not to transmit the CSI feedback (RI, CQI, PMI, and / or LI) for the MRbeams if the UL payload is insufficient for transmitting all of the generated UCI.
[0042] Accordingly, there is a need for operations to support a CRI-based CSI enhancement in which the network may configure the MR term. In some aspects of these example embodiments, the configuration of MR is described. The configuration details for MR may include a restriction applied to the MR configuration; an explicit configuration or an implicit determination of the identity of the MR CSI-RS resources from amongst the KS resources; and a configuration of associated IMR resources. In further aspects of these example embodiments, the CSI report carrying the CSI feedback may be constructed to include feedback for the MR CSI-RS resources and / or CSI-RS resources selected from the remaining (KS-MR) CSI-RS resources when M>MR (those beams from the configured set being available for selection excluding the MR beams) , referred to herein as the (M-MR) CSI-RS resources or beams. In still further aspects of these example embodiments, UCI generated from amongst the M or MRbeams may be dropped or omitted when the UL payload is insufficient for transmitting all of the generated UCI.
[0043] In some embodiments, a restriction may be applied to the MR configuration of the UE by the network. For CRI based CSI enhancement to support hybrid beamforming, when the network configures KS>1 CSI-RS resources, following may be considered as the restriction for the MR CSI-RS resources configuration.
[0044] The Rel-16 eType-II codebook has a complexity substantially greater than the Rel-15 Type 1 single panel (SP) or multi-panel (MP) codebook. Accordingly, the restriction may be stricter for the Rel-16 eType-II codebook so that an excessive degree of processing / overhead is not imposed on the UE, although this affords less flexibility from a network perspective.
[0045] For Rel-16 eType-II codebook, in one embodiment, the restriction may comprise a maximum MR=1, e.g., MR=0 or MR=1. In another embodiment, the restriction may comprise a maximum MR=2, e.g., MR=0 or MR=1 or MR=2. In another embodiment, when the network configures the UE to report M>1 sets of RI / CQI / PMI, the network has to configure at least MR=1.
[0046] For Rel-15 Type-I Single Panel (SP) codebook, in one embodiment, the UE may report the maximum number of MR that the UE may support. The candidate value range may comprise, e.g., {1,2,3,4}.
[0047] In some embodiments, the MR CSI-RS resources may be configured explicitly or may be determined implicitly by the UE.
[0048] In one embodiment, the network configures only a value MR. The identity of the MR CSI-RS resources (e.g., the CRI) are implicitly determined. In one option, the MR CSI-RS resources are selected based on the CSI-RS resource ID, i.e., NZP-CSI-RS-ResourceId, e.g., MR CSI-RS resources with the lowest / highest NZP-CSI-RS-ResourceId. In another option, the MR CSI-RS resources are selected based on the order of CSI-RS resource configured in the corresponding CSI-RS resource set, e.g., the first or the last MR CSI-RS resources configured in the CSI-RS resource set used for the channel measurement.
[0049] In another embodiment, the network explicitly configures / selects MR CSI-RS resources, e.g., via bitmap.
[0050] In some embodiments, the IMR configuration may be shared among the KS or MR CSI-RS resources or a separate associated IMR resource is configured for the KS or MR CSI-RS resources. In one option, all the KS or MR CSI-RS resources share the same IMR resource. In another option, each CSI-RS resource in the KS or MR CSI-RS resources is configured with an associated IMR resource. It is noted that either one of the options may be considered for different IMR or the same option may be considered for different IMR. For example, NZP (Non-Zero Power) IMR, e.g., NZP-CSI-RS-Resource, may consider the second option and ZP (Zero Power) IMR, e.g., CSI-IM, may consider the first option.
[0051] CSI feedback is transmitted in one or more CSI report carried in uplink control information (UCI) . The CSI feedback is assembled in the CSI report in a mapping order specified in 3GPP TS 38.212.
[0052] For the Rel-15 Type-I SP codebook with wideband PMI / CQI, each CSI report has only one part. The CSI report may include CRI, RI, LI, zero padding bits Op, PMI wideband information fields X1, PMI wideband information fields X2, wideband CQI for a first TB and / or wideband CQI for a second TB (see 3GPP TS 38.212 Table 6.3.1.1.2-7) .
[0053] For the Rel-15 Type-I SP codebook with subband PMI / CQI and for the Rel-16 eType-II codebook, each CSI report may be assembled in up to four parts including CSI Part 1, CSI Part 2 Group 0, CSI Part 2 Group 1 and CSI Part 2 Group 2. CSI part 1 has a fixed payload size and identifies the number of information bits in CSI part 2. CSI part 1 is needed by the gNB for decoding CSI part 2 and therefore must be transmitted completely before the transmission of CSI part 2. In general, groups 0, 1 and 2 of CSI part 2 include CSI feedback in a decreasing order of importance.
[0054] Fig. 3 shows a table 300 for assembling CSI feedback for the Rel-15 Type-I SP codebook (subband) and the Rel-16 eType-II codebook according to existing specification. For the Rel-15 Type-I SP codebook, CSI Part 1 may include CRI, RI, some CQI, and indicators of the number of PMI to be reported in CSI Part 2 (see 3GPP TS 38.212 Tables 6.3.1.1.2-9 and 6.3.2.1.2-3) . CSI Part 2 Group 0 may include wideband CQI, LI and wideband PMI (see 3GPP TS 38.212 Tables 6.3.1.1.2-10 and 6.3.2.1.2-4) . CSI Part 2 Group 1 may include subband CQI and PMI for even subbands and CSI Part 2 Group 2 may include subband CQI and PMI for odd subbands (see 3GPP TS 38.212 Tables 6.3.1.1.2-11 and 6.3.2.1.2-5) .
[0055] For the Rel-16 eType-II codebook, CSI part 1 may include CRI, RI, CQI, SINR and indicators of the number of PMI to be reported in CSI Part 2 (see 3GPP TS 38.212 Tables 6.3.2.1.2-3) . CSI Part 2 Group 0 may include PMI fields X1 and CSI Part 2 Groups 1 / 2 may include PMI fields X2 in order of priority (see 3GPP TS 38.212 Tables 6.3.2.1.2-5A) .
[0056] In some embodiments, for CRI based CSI enhancement to support hybrid beam forming, when the network configures KS>1CSI-RS resources and configures the UE to report M sets of RI / CQI / PMI and LI (if applicable) , among which the configures / selects MR CSI-RS resources and configures the UE to select (M-MR) CSI-RS resources among the remaining (KS-MR) CSI-RS resources, the UE reports the selected (M-MR) CSI-RS resources in CSI part 1 as CRI. When the network configures MR=M, the UE omits the CRI reporting.
[0057] In some embodiments, for CRI based CSI enhancement to support hybrid beam forming, for CSI assembly of M sets of RI / CQI / PMI and LI (if applicable) , the UE may assemble two sets of RI / CQI / PMI / LI separately and sequentially. The UE may assemble a first set of RI / CQI / PMI / LI of the MR CSI-RS resources configured by the network and a second set of RI / CQI / PMI / LI of the (M-MR) CSI-RS resources selected by the UE.
[0058] In one option, the UE may encode the CSI for the MRCSI-RS resources configured by the network before the (M-MR)CSI-RS resources selected by the UE. Fig. 4a shows a diagram 400 for assembling CSI feedback for M sets of RI / CQI / PMI / LI according to one option of these example embodiments. As shown, the MR CSI-RS resources configured by the network are encoded before the (M-MR) CSI-RS resources selected by the UE.
[0059] In another option, the UE may encode the CSI for the (M-MR) CSI-RS resources selected by the UE before the MR CSI-RS resources configured by the network. Fig. 4b shows a diagram 410 for assembling CSI feedback for M sets of RI / CQI / PMI / LI according to another option of these example embodiments. As shown, the (M-MR) CSI-RS resources selected by the UE are encoded before the MR CSI-RS resources configured by the network.
[0060] In some embodiments, for the RI / CQI / PMI / LI of the (M-MR) CSI-RS resources selected by the UE, the UE assembles CSI Part 1 in the order of (M-MR) CRI reported by the UE. In other words, for CSI Part 1, the UE reports CRI corresponding to (M-MR) CSI-RS resources in a particular order, e.g., a first CRI, a second CRI, ..., a last CRI, and the UE assembles the CSI Part 1 CSI feedback for these CRI (e.g., RI, CQI, PMI to be reported in CSI Part 2 per CRI) in the same order.
[0061] [Corrected under Rule 26, 22.08.2024]Fig. 5 shows a diagram 500 for assembling CSI feedback in CSI Part 1 for M sets of RI / CQI / PMI / LI according to various example embodiments. In this example, the MR CSI-RS resources configured by the network are encoded before the (M-MR) CSI-RS resources selected by the UE (referring to the option shown in Fig. 4a) . As shown, CSI Part 1 of the MR CSI-RS resources are encoded first, CSI Part 1 of the first reported CRI of the (M-MR) CSI-RS resources are encoded next, CSI Part 1 of the second reported CRI of the (M-MR) CSI-RS resources are encoded next, etc., until the last reported CRI of the (M-MR) CSI-RS resources are encoded.
[0062] In some embodiments, for the RI / CQI / PMI / LI of the (M-MR) CSI-RS resources selected by the UE, the UE assembles CSI Part 2 according to one of the two following options. In a first option, the UE first assembles Group 0 sequentially among all the reported CRI, then assembles Group 1 sequentially among all the reported CRI, then assembles Group 2 sequentially among all the reported CRI. In a second option, the UE first assembles all CSI Part 2 feedback for the first reported CRI (including Groups 0 / 1 / 2) , then assembles all CSI Part 2 feedback for the second reported CRI (including Groups 0 / 1 / 2) , etc., until assembling all CSI Part 2 feedback for the last reported CRI (including Groups 0 / 1 / 2) .
[0063] [Corrected under Rule 26, 22.08.2024]Fig. 6a shows a diagram 600 for assembling CSI feedback in CSI Part 2 for M sets of RI / CQI / PMI / LI according to one option of these example embodiments. In this example, the MR CSI-RS resources configured by the network are encoded before the (M-MR) CSI-RS resources selected by the UE (referring to the option shown in Fig. 4a) . As shown, CSI Part 2 of the MR CSI-RS resources is encoded first. Next, CSI Part 2 Group 0 corresponding to all reported CRI of the (M-MR) CSI-RS resources are encoded in sequential order (first CRI, second CRI, ..., last CRI) . Next, CSI Part 2 Group 1 corresponding to all reported CRI of the (M-MR) CSI-RS resources are encoded in sequential order (first CRI, second CRI, ..., last CRI) . Next, CSI Part 2 Group 2 corresponding to all reported CRI of the (M-MR) CSI-RS resources are encoded in sequential order (first CRI, second CRI, ..., last CRI) .
[0064] [Corrected under Rule 26, 22.08.2024]Fig. 6b shows a diagram 610 for assembling CSI feedback in CSI Part 2 for M sets of RI / CQI / PMI / LI according to another option of these example embodiments. In this example, the MR CSI-RS resources configured by the network are encoded before the (M-MR) CSI-RS resources selected by the UE (referring to the option shown in Fig. 4a) . As shown, CSI Part 2 of the MR CSI-RS resources is encoded first. Next, CSI Part 2 Group 0 corresponding to the first reported CRI of the (M-MR) CSI-RS resources is encoded, followed by CSI Part 2 Group 1 corresponding to the first reported CRI and CSI Part 2 Group 2 corresponding to the first reported CRI. Next, CSI Part 2 Group 0 corresponding to the second reported CRI of the (M-MR) CSI-RS resources is encoded, followed by CSI Part 2 Group 1 corresponding to the second reported CRI and CSI Part 2 Group 2 corresponding to the second reported CRI. The encoding of CSI Part 2 continues until the last reported CRI of the (M-MR) CSI-RS resources.
[0065] When an uplink payload is insufficient to carry all the UCI of the CSI report, the UE may omit some aspects of the CSI report according to predefined rules.
[0066] In some embodiments, for CRI based CSI enhancement to support hybrid beam forming, when the network configures KS>1 CSI-RS resources and configures the UE to report M sets of RI / CQI / PMI and LI (if applicable) , among which the network configures / selects MR CSI-RS resources and configures the UE to select (M-MR) CSI-RS resources among the remaining (KS-MR) CSI-RS resources, when UCI omission is needed due to the insufficient UL payload, the UE may omit CSI feedback according to the following options.
[0067] In one option, the UE first omits the RI / CQI / PMI and LI (if applicable) corresponding to the (M-MR) CSI-RS resources selected by the UE. In another option, the UE first omits the RI / CQI / PMI and LI (if applicable) corresponding to the MR CSI-RS resources configured / selected by the network.
[0068] When the UE omits the RI / CQI / PMI and LI (if applicable) corresponding to the MR CSI-RS resources configured / selected by the network, the UE may omit the CSI feedback according to the following options.
[0069] In one option, the UE may sequentially omit MR CSI-RS resources, e.g., omit the MR CSI-RS resources one at a time until the UCI fits within the UL payload. The order of omission may be based on the CSI-RS resource ID or may be based on the order of CSI-RS resources configured in the corresponding CSI-RS resource set. In another option, the UE omits all MR CSI-RS resources.
[0070] When the UE omits the RI / CQI / PMI and LI (if applicable) corresponding to the MR CSI-RS resources configured / selected by the network, the UE may omit the CSI feedback for particular CSI-RS resources according to the following options.
[0071] In a first option, the UE may sequentially omit CSI part 2 group 2, CSI part 2 group 1, CSI part 2 group 0, and CSI part 1. For each CSI part / group, the UE may omit all the MR CSI-RS resources before the UE moves to the next part / group in order of priority until the UCI fits within the UL payload. For example, the UE first omits CSI part 2 group 2 for all MR CSI-RS resources before omitting CSI part 2 group 1 for any of the MR CSI-RS resources.
[0072] In a second option, for each CSI-RS resource in the MR CSI-RS resources, the UE may omit all CSI parts before moving to the next CSI-RS resource. In a third option, for each CSI-RS resource in the MR CSI-RS resources, the UE may omit all CSI part 2 (including groups 0, 1 and 2) before moving to the next CSI-RS. In a fourth option, the UE omits all CSI parts of all the MR CSI-RS resources.
[0073] When the UE omits the RI / CQI / PMI and LI (if applicable) corresponding to the (M-MR) CSI-RS resources selected by the UE, the UE may omit the CSI feedback according to the following options.
[0074] In one option, the UE may sequentially omit (M-MR) CSI-RS resources, e.g., omit the (M-MR) CSI-RS resources one at a time until the UCI fits within the UL payload. The order of omission may be based on the order of CRI reported by the UE. In another option, the UE omits all (M-MR) CSI-RS resources.
[0075] When the UE omits the RI / CQI / PMI and LI (if applicable) corresponding to the (M-MR) CSI-RS resources selected by the UE, the UE may omit the CSI feedback for particular CSI-RS resources according to the following options.
[0076] In a first option, the UE may sequentially omit CSI part 2 group 2, CSI part 2 group 1, CSI part 2 group 0, and CSI part 1. For each CSI part / group, the UE may omit all the (M-MR) CSI-RS resources before the UE moves to the next part / group in order of priority until the UCI fits within the UL payload. For example, the UE first omits CSI part 2 group 2 for all (M-MR) CSI-RS resources before omitting CSI part 2 group 1 for any of the MR CSI-RS resources.
[0077] In a second option, for each CSI-RS resource in the(M-MR) CSI-RS resources, the UE may omit all CSI parts before moving to the next CSI-RS resource. In a third option, for each CSI-RS resource in the (M-MR) CSI-RS resources, the UE may omit all CSI part 2 (including groups 0, 1 and 2) before moving to the next CSI-RS. In a fourth option, the UE omits all CSI parts of all the (M-MR) CSI-RS resources.
[0078] Fig. 7 shows an example network arrangement 700 according to various example embodiments. The example network arrangement 700 includes a UE 710. The UE 710 may be any type of electronic component that is configured to communicate via a network, e.g., mobile phones, tablet computers, desktop computers, smartphones, embedded devices, wearables, Internet of Things (IoT) devices, etc. An actual network arrangement may include any number of UEs being used by any number of users. Thus, the example of one UE 710 is merely provided for illustrative purposes.
[0079] The UE 710 may be configured to communicate with one or more networks. In the example of the network arrangement 700, the network with which the UE 710 may wirelessly communicate is a 5G NR radio access network (RAN) 720. However, the UE 710 may also communicate with other types of networks (e.g., 5G cloud RAN, a next generation RAN (NG-RAN) , a legacy cellular network, etc. ) and the UE 710 may also communicate with networks over a wired connection. With regard to the example embodiments, the UE 710 may establish a connection with the 5G NR RAN 720. Therefore, the UE 710 may have a 5G NR chipset to communicate with the NR RAN 720.
[0080] The 5G NR RAN 720 may be portions of a cellular network that may be deployed by a network carrier (e.g., Verizon, AT&T, T-Mobile, etc. ) . The RAN 720 may include cells or base stations that are configured to send and receive traffic from UEs that are equipped with the appropriate cellular chip set. In this example, the 5G NR RAN 720 includes the gNB 720A and the gNB 720B. However, reference to a gNB is merely provided for illustrative purposes, any appropriate base station or cell may be deployed (e.g., Node Bs, eNodeBs, HeNBs, eNBs, gNBs, gNodeBs, macrocells, microcells, small cells, femtocells, etc. ) .
[0081] Any association procedure may be performed for the UE 710 to connect to the 5G NR RAN 720. For example, as discussed above, the 5G NR RAN 720 may be associated with a particular network carrier where the UE 710 and / or the user thereof has a contract and credential information (e.g., stored on a SIM card) . Upon detecting the presence of the 5G NR RAN 720, the UE 710 may transmit the corresponding credential information to associate with the 5G NR RAN 720. More specifically, the UE 710 may associate with a specific cell (e.g., gNB 720A) .
[0082] The network arrangement 700 also includes a cellular core network 730, the Internet 740, an IP Multimedia Subsystem (IMS) 750, and a network services backbone 760. The cellular core network 730 manages the traffic that flows between the cellular network and the Internet 740. The IMS 750 may be generally described as an architecture for delivering multimedia services to the UE 710 using the IP protocol. The IMS 750 may communicate with the cellular core network 730 and the Internet 740 to provide the multimedia services to the UE 710. The network services backbone 760 is in communication either directly or indirectly with the Internet 740 and the cellular core network 730. The network services backbone 760 may be generally described as a set of components (e.g., servers, network storage arrangements, etc. ) that implement a suite of services that may be used to extend the functionalities of the UE 710 in communication with the various networks.
[0083] Fig. 8 shows an example UE 710 according to various example embodiments. The UE 710 will be described with regard to the network arrangement 700 of Fig. 7. The UE 710 may represent any electronic device and may include a processor 805, a memory arrangement 810, a display device 815, an input / output (I / O) device 820, a transceiver 825, and other components 830. The other components 830 may include, for example, an audio input device, an audio output device, a battery that provides a limited power supply, a data acquisition device, ports to electrically connect the UE 710 to other electronic devices, sensors to detect conditions of the UE 710, etc.
[0084] The processor 805 may be configured to execute a plurality of engines for the UE 710. For example, the engines may include a hybrid beamforming engine 835 for performing operations related to CRI-based CSI reporting in which MR CSI-RS resources are configured to be reported, as described in detail above.
[0085] The above referenced engine being an application (e.g., a program) executed by the processor 805 is only an example. The functionality associated with the engines may also be represented as a separate incorporated component of the UE 710 or may be a modular component coupled to the UE 710, e.g., an integrated circuit with or without firmware. For example, the integrated circuit may include input circuitry to receive signals and processing circuitry to process the signals and other information. The engines may also be embodied as one application or separate applications. In addition, in some UEs, the functionality described for the processor 805 is split among two or more processors such as a baseband processor and an applications processor. The example embodiments may be implemented in any of these or other configurations of a UE.
[0086] The memory arrangement 810 may be a hardware component configured to store data related to operations performed by the UE 710. The display device 815 may be a hardware component configured to show data to a user while the I / O device 820 may be a hardware component that enables the user to enter inputs. The display device 815 and the I / O device 820 may be separate components or integrated together such as a touchscreen.
[0087] The transceiver 825 may be a hardware component configured to establish a connection with the 5G NR-RAN 720, an LTE-RAN (not pictured) , a legacy RAN (not pictured) , a WLAN (not pictured) , etc. Accordingly, the transceiver 825 may operate on a variety of different frequencies or channels (e.g., set of consecutive frequencies) . The transceiver 825 includes circuitry configured to transmit and / or receive signals (e.g., control signals, data signals) . Such signals may be encoded with information implementing any one of the methods described herein. The processor 805 may be operably coupled to the transceiver 825 and configured to receive from and / or transmit signals to the transceiver 825. The processor 805 may be configured to encode and / or decode signals (e.g., signaling from a base station of a network) for implementing any one of the methods described herein.
[0088] Fig. 9 shows an example base station 900 according to various example embodiments. The base station 900 may represent the gNB 720A, the gNB 720B or any other access node through which the UE 710 may establish a connection and manage network operations. The base station 900 may operate as the MN or the SN as described in the examples above.
[0089] The base station 900 may include a processor 905, a memory arrangement 910, an input / output (I / O) device 915, a transceiver 920, and other components 925. The other components 925 may include, for example, an audio input device, an audio output device, a battery, a data acquisition device, ports to electrically connect the base station 500 to other electronic devices and / or power sources, etc.
[0090] The processor 905 may be configured to execute a plurality of engines for the base station 900. For example, the engines may include a hybrid beamforming engine 930 for performing operations related to CRI-based CSI reporting in which MR CSI-RS resources are configured to be reported, as described in detail above.
[0091] The memory arrangement 910 may be a hardware component configured to store data related to operations performed by the base station 900. The I / O device 915 may be a hardware component or ports that enable a user to interact with the base station 900.
[0092] The transceiver 920 may be a hardware component configured to exchange data with the UE 710 and any other UE in the network arrangement 700. The transceiver 920 may operate on a variety of different frequencies or channels (e.g., set of consecutive frequencies) . The transceiver 920 includes circuitry configured to transmit and / or receive signals (e.g., control signals, data signals) . Such signals may be encoded with information implementing any one of the methods described herein. The processor 905 may be operably coupled to the transceiver 920 and configured to receive from and / or transmit signals to the transceiver 920. The processor 905 may be configured to encode and / or decode signals (e.g., signaling from a UE) for implementing any one of the methods described herein.
[0093] Examples
[0094] In a first example, a method, comprising processing, based on signals received from a cell of a network, a configuration for channel state information (CSI) reporting including a CSI reference signal (CSI-RS) resource set comprising KS CSI-RS resources, an indication of M CSI-RS resources of the CSI-RS resource set to be included in a CSI report, an indication of MR CSI-RS resources of the CSI-RS resource set for which CSI feedback is to be generated, and a codebook type for the CSI report, measuring CSI-RS transmitted in each of the KS CSI-RS resources including the MR CSI-RS resources and remaining (KS-MR) CSI-RS resources to determine CSI of each of the KS CSI-RS resources and generating CSI feedback for each of the MR CSI-RS resources regardless of the RSRP determined for the different beams and CSI feedback for each of the (M-MR) CSI-RS resources that are selected for reporting.
[0095] In a second example, the method of the first example, wherein the network is restricted to configuring a maximum number of MR CSI-RS resources when the codebook type is a Rel-16 enhanced Type-II codebook, the method further comprising expecting the indication of the MR CSI-RS resources to be less than or equal to the maximum number of MR CSI-RS resources.
[0096] In a third example, the method of the second example, wherein, wherein the maximum number of MR CSI-RS resources is one or two.
[0097] In a fourth example, the method of the first example, wherein the network is restricted to configuring at least one MRCSI-RS resource when the M CSI-RS resources is greater than one and the codebook type is a Rel-16 enhanced Type-II codebook, the method further comprising determining the indication of the MR CSI-RS resources to be at least one when the M CSI-RS resources is greater than one.
[0098] In a fifth example, the method of the first example, further comprising reporting to the network a maximum number of MR CSI-RS resources supported for a Rel-15 Type-I single panel codebook and determining the indication of the MR CSI-RS resources to be less than or equal to the maximum number of MR CSI-RS resources.
[0099] In a sixth example, the method of the fifth example, wherein the maximum number of MR CSI-RS resources supported for the Rel-15 Type-I single panel codebook is one, two, three or four.
[0100] In a seventh example, the method of the first example, wherein the indication of the MR CSI-RS resources comprises a value, the method further comprising implicitly determining an identity of each of the MR CSI-RS resource.
[0101] In an eighth example, the method of the seventh example, wherein the identity of each of the MR CSI-RS resource is implicitly determined based on a CSI-RS resource identifier (ID) .
[0102] In a ninth example, the method of the eighth example, wherein the identity of each of the MR CSI-RS resource is implicitly determined based on an order of the CSI-RS resources in the CSI-RS resource set configuration.
[0103] In a tenth example, the method of the first example, wherein the indication of the MR CSI-RS resources comprises a bitmap explicitly indicating an identity of each of the MR CSI-RS resource.
[0104] In an eleventh example, the method of the first example, wherein the configuration for the CSI reporting further includes one or more interference measurement resources (IMR) associated with the CSI-RS resources, the method further comprising determining all of the KS CSI-RS resources or all of the MR CSI-RS resources to share a same IMR resource, or determining each of the KS CSI-RS resources or each of the MRCSI-RS resources to be associated with a respective IMR resource.
[0105] In a twel fth example, the method of the eleventh example, further comprising determining all of the KS CSI-RS resources or all of the MR CSI-RS resources to share a same zero-power IMR (ZP-IMR) resource, and determining each of the KSCSI-RS resources or each of the MR CSI-RS resources to be associated with a respective non-zero-power IMR (NZP-IMR) resource.
[0106] In a thirteenth example, the method of the first example, wherein a number of M CSI-RS resources is equal to a number of MR CSI-RS resources, the method further comprising omitting CSI-RS resource indicator (CRI) reporting.
[0107] In a fourteenth example, the method of the first example, wherein a number of M CSI-RS resources is greater than a number of MR CSI-RS resources, the method further comprising selecting (M-MR) CSI-RS resources based on the CSI of the remaining (KS-MR) CSI-RS resources and reporting the selected (M-MR) CSI-RS resources in CSI Part 1 as CSI-RS resource indicator (CRI) .
[0108] In a fifteenth example, the method of the fourteenth example, further comprising generating a first set of CSI feedback corresponding to the MR CSI-RS resources and a second set of CSI feedback corresponding to the selected (M-MR) CSI-RS resources and encoding the first set of CSI feedback and the second set of CSI feedback separately and sequentially.
[0109] In a sixteenth example, the method of the fifteenth example, wherein the first set of CSI feedback is encoded before the second set of CSI feedback or the second set of CSI feedback is encoded before the first set of CSI feedback.
[0110] In a seventeenth example, the method of the fourteenth example, wherein the CSI Part 1 includes CSI feedback for each of the selected (M-MR) CSI-RS resources, wherein an order of the CSI feedback in CSI Part 1 corresponds to an order of the CRI.
[0111] In an eighteenth example, the method of the fourteenth example, further comprising generating CSI feedback for the selected (M-MR) CSI-RS resources in an order in which CSI Part 2 Group 0 feedback is encoded sequentially for all of the selected (M-MR) CSI-RS resources, then CSI Part 2 Group 1 feedback is encoded sequentially for all of the selected (M-MR)CSI-RS resources, then CSI Part 2 Group 2 feedback is encoded sequentially for all of the selected (M-MR) CSI-RS resources and reporting the CSI feedback in CSI Part 2.
[0112] In a nineteenth example, the method of the fourteenth example, further comprising generating CSI feedback for the selected (M-MR) CSI-RS resources in an order in which all CSI Part 2 feedback is encoded sequentially for all of the selected (M-MR) CSI-RS resources and reporting the CSI feedback in CSI Part 2.
[0113] In a twentieth example, the method of the fifteenth example, wherein an uplink (UL) payload is insufficient for reporting uplink control information (UCI) including all of the first set of CSI feedback corresponding to the MR CSI-RS resources and all of the second set of CSI feedback corresponding to the selected (M-MR) CSI-RS resources, the method further comprising omitting from the CSI reporting either the first set of CSI feedback before the second set of CSI feedback or the second set of CSI feedback before the first set of CSI feedback.
[0114] In a twenty first example, the method of the twentieth example, wherein the first set of CSI feedback is omitted from the CSI reporting before the second set of CSI feedback, the method further comprising sequentially omitting CSI feedback corresponding to the MR CSI-RS resources until the UCI fits within the UL payload, wherein an order of omission is based on either a CSI-RS resource ID or an order of configuration of the CSI-RS resources in the CSI-RS resource set.
[0115] In a twenty second example, the method of the twentieth example, wherein the first set of CSI feedback is omitted from the CSI reporting before the second set of CSI feedback, the method further comprising omitting all CSI feedback corresponding to the MR CSI-RS resources.
[0116] In a twenty third example, the method of the twentieth example, wherein the first set of CSI feedback is omitted from the CSI reporting before the second set of CSI feedback, the method further comprising sequentially omitting CSI feedback corresponding to the MR CSI-RS resources in an order of CSI Part 2 Group 2, then CSI Part 2 Group 1, then CSI Part 2 Group 0 and then CSI Part 1 until the UCI fits within the UL payload.
[0117] In a twenty fourth example, the method of the twenty third example, wherein all of the CSI Part 2 Group 2, the CSI Part 2 Group 1, the CSI Part 2 Group 0 and the CSI Part 1 are omitted for one of the MR CSI-RS resources before any CSI feedback is omitted for another one of the MR CSI-RS resources.
[0118] In a twenty fifth example, the method of the twenty third example, wherein the CSI Part 2 Group 2, the CSI Part 2 Group 1 and the CSI Part 2 Group 0 are sequentially omitted for the MR CSI-RS resources and CSI Part 1 is not omitted for the MRCSI-RS resources.
[0119] In a twenty sixth example, the method of the twentieth example, wherein the second set of CSI feedback is omitted from the CSI reporting before the first set of CSI feedback, the method further comprising sequentially omitting CSI feedback corresponding to the (M-MR) CSI-RS resources until the UCI fits within the UL payload, wherein an order of omission is based on an order of CRI in CSI Part 1.
[0120] In a twenty seventh example, the method of the twentieth example, wherein the second set of CSI feedback is omitted from the CSI reporting before the first set of CSI feedback, the method further comprising omitting all CSI feedback corresponding to the (M-MR) CSI-RS resources.
[0121] In a twenty eighth example, the method of the twentieth example, wherein the second set of CSI feedback is omitted from the CSI reporting before the first set of CSI feedback, the method further comprising sequentially omitting CSI feedback corresponding to the (M-MR) CSI-RS resources in an order of CSI Part 2 Group 2, then CSI Part 2 Group 1, then CSI Part 2 Group 0 and then CSI Part 1 until the UCI fits within the UL payload.
[0122] In a twenty ninth example, the method of the twenty eighth example, wherein all of the CSI Part 2 Group 2, the CSI Part 2 Group 1, the CSI Part 2 Group 0 and the CSI Part 1 are omitted for one of the (M-MR) CSI-RS resources before any CSI feedback is omitted for another one of the (M-MR) CSI-RS resources.
[0123] In a thirtieth example, the method of the twenty eighth example, wherein the CSI Part 2 Group 2, the CSI Part 2 Group 1 and the CSI Part 2 Group 0 are sequentially omitted for the (M-MR) CSI-RS resources and CSI Part 1 is not omitted for the (M-MR) CSI-RS resources.
[0124] In a thirty first example, the a processor configured to perform any of the methods of the first through thirtieth examples.
[0125] In a thirty second example, the a user equipment (UE) configured to perform any of the methods of the first through thirtieth examples.
[0126] Those skilled in the art will understand that the above-described example embodiments may be implemented in any suitable software or hardware configuration or combination thereof. An example hardware platform for implementing the example embodiments may include, for example, an Intel x86 based platform with compatible operating system, a Windows OS, a Mac platform and MAC OS, a mobile device having an operating system such as iOS, Android, etc. The example embodiments of the above described method may be embodied as a program containing lines of code stored on a non-transitory computer readable storage medium that, when compiled, may be executed on a processor or microprocessor.
[0127] Although this application described various embodiments each having different features in various combinations, those skilled in the art will understand that any of the features of one embodiment may be combined with the features of the other embodiments in any manner not specifically disclaimed or which is not functionally or logically inconsistent with the operation of the device or the stated functions of the disclosed embodiments.
[0128] It is well understood that the use of personally identifiable information should follow privacy policies and practices that are generally recognized as meeting or exceeding industry or governmental requirements for maintaining the privacy of users. In particular, personally identifiable information data should be managed and handled so as to minimize risks of unintentional or unauthorized access or use, and the nature of authorized use should be clearly indicated to users.
[0129] It will be apparent to those skilled in the art that various modifications may be made in the present disclosure, without departing from the spirit or the scope of the disclosure. Thus, it is intended that the present disclosure cover modifications and variations of this disclosure provided they come within the scope of the appended claims and their equivalent.
Claims
1.An apparatus comprising processing circuitry configured to:process, based on signals received from a cell of a network, a configuration for channel state information (CSI) reporting including a CSI reference signal (CSI-RS) resource set comprising KS CSI-RS resources, an indication of M CSI-RS resources of the CSI-RS resource set to be included in a CSI report, an indication of MR CSI-RS resources of the CSI-RS resource set for which CSI feedback is to be generated, and a codebook type for the CSI report;measure CSI-RS transmitted in each of the KS CSI-RS resources including the MR CSI-RS resources and remaining (KS-MR) CSI-RS resources to determine CSI of each of the KS CSI-RS resources; andgenerate CSI feedback for each of the MR CSI-RS resources regardless of the RSRP determined for the different beams and CSI feedback for each of the (M-MR) CSI-RS resources that are selected for reporting.2.The apparatus of claim 1, wherein the network is restricted to configuring a maximum number of MR CSI-RS resources when the codebook type is a Rel-16 enhanced Type-II codebook, the processing circuitry further configured to:expect the indication of the MR CSI-RS resources to be less than or equal to the maximum number of MR CSI-RS resources.3.The apparatus of claim 1, wherein the network is restricted to configuring at least one MR CSI-RS resource when the M CSI-RS resources is greater than one and the codebook type is a Rel-16 enhanced Type-II codebook, the processing circuitry further configured to:determine the indication of the MR CS I-RS resources to be at least one when the M CSI-RS resources is greater than one.4.The apparatus of claim 1, the processing circuitry further configured to:report to the network a maximum number of MR CSI-RS resources supported for a Rel-15 Type-I single panel codebook; anddetermine the indication of the MR CS I-RS resources to be less than or equal to the maximum number of MR CSI-RS resources.5.The apparatus of claim 1, wherein the indication of the MR CSI-RS resources comprises a value, the processing circuitry further configured to:implicitly determine an identity of each of the MR CSI-RS resource.6.The apparatus of claim 5, wherein the identity of each of the MR CSI-RS resource is implicitly determined based on a CSI-RS resource identifier (ID) .7.The apparatus of claim 6, wherein the identity of each of the MR CSI-RS resource is implicitly determined based on an order of the CSI-RS resources in the CSI-RS resource set configuration.8.The apparatus of claim 1, wherein the indication of the MR CSI-RS resources comprises a bitmap explicitly indicating an identity of each of the MR CSI-RS resource.9.The apparatus of claim 1, wherein the configuration for the CSI reporting further includes one or more interference measurement resources (IMR) associated with the CSI-RS resources, the processing circuitry further configured to:determine all of the KS CSI-RS resources or all of the MRCSI-RS resources to share a same IMR resource, ordetermine each of the KS CSI-RS resources or each of the MR CSI-RS resources to be associated with a respective IMR resource.10.The apparatus of claim 1, wherein a number of M CSI-RS resources is equal to a number of MR CSI-RS resources, the processing circuitry further configured to:omit CSI-RS resource indicator (CRI) reporting.11.The apparatus of claim 1, wherein a number of M CSI-RS resources is greater than a number of MR CSI-RS resources, the processing circuitry further configured to:select (M-MR) CSI-RS resources based on the CSI of the remaining (KS-MR) CSI-RS resources; andreport the selected (M-MR) CSI-RS resources in CSI Part 1 as CSI-RS resource indicator (CRI) .12.The apparatus of claim 11, the processing circuitry further configured to:generate a first set of CSI feedback corresponding to the MR CSI-RS resources and a second set of CSI feedback corresponding to the selected (M-MR) CSI-RS resources; andencode the first set of CSI feedback and the second set of CSI feedback separately and sequentially.13.The apparatus of claim 11, the processing circuitry further configured to:generate CSI feedback for the selected (M-MR) CSI-RS resources in an order in which:CSI Part 2 Group 0 feedback is encoded sequentially for all of the selected (M-MR) CSI-RS resources, then CSI Part 2 Group 1 feedback is encoded sequentially for all of the selected (M-MR) CSI-RS resources, then CSI Part 2 Group 2 feedback is encoded sequentially for all of the selected (M-MR) CSI-RS resources; and report the CSI feedback in CSI Part 2.14.The apparatus of claim 11, the processing circuitry further configured to:generate CSI feedback for the selected (M-MR) CSI-RS resources in an order in which all CSI Part 2 feedback is encoded sequentially for all of the selected (M-MR) CSI-RS resources; andreport the CSI feedback in CSI Part 2.15.The apparatus of claim 12, wherein an uplink (UL) payload is insufficient for reporting uplink control information (UCI) including all of the first set of CSI feedback corresponding to the MR CSI-RS resources and all of the second set of CSI feedback corresponding to the selected (M-MR) CSI-RS resources, the processing circuitry further configured to:omit from the CSI reporting either the first set of CSI feedback before the second set of CSI feedback or the second set of CSI feedback before the first set of CSI feedback.16.The apparatus of claim 15, wherein the first set of CSI feedback is omitted from the CSI reporting before the second set of CSI feedback, the processing circuitry further configured to:sequentially omit CSI feedback corresponding to the MR CSI-RS resources until the UCI fits within the UL payload, wherein an order of omission is based on either a CSI-RS resource ID or an order of configuration of the CSI-RS resources in the CSI-RS resource set.17.The apparatus of claim 15, wherein the first set of CSI feedback is omitted from the CSI reporting before the second set of CSI feedback, the processing circuitry further configured to:omit all CSI feedback corresponding to the MR CSI-RS resources.18.The apparatus of claim 15, wherein the first set of CSI feedback is omitted from the CSI reporting before the second set of CSI feedback, the processing circuitry further configured to:sequentially omit CSI feedback corresponding to the MR CSI-RS resources in an order of CSI Part 2 Group 2, then CSI Part 2 Group 1, then CSI Part 2 Group 0 and then CSI Part 1 until the UCI fits within the UL payload.19.The apparatus of claim 15, wherein the second set of CSI feedback is omitted from the CSI reporting before the first set of CSI feedback, the processing circuitry further configured to:sequentially omit CSI feedback corresponding to the (M-MR)CSI-RS resources until the UCI fits within the UL payload, wherein an order of omission is based on an order of CRI in CSI Part 1.20.The apparatus of claim 15, wherein the second set of CSI feedback is omitted from the CSI reporting before the first set of CSI feedback, the processing circuitry further configured to:omit all CSI feedback corresponding to the (M-MR) CSI-RS resources.
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