System and method for channel state information reporting format and omission rules in coherent cooperative transmission

Abstract

Presented are systems and methods for channel state information (CSI) reporting formats and omission rules in coherent cooperative transmission (CJT). RS The configuration associated with a set of N reference signal (RS) resources may be received. RS may be a positive integer value. The wireless communication device receives N RS The wireless communication device may receive at least one RS corresponding to the N RS resources. RS N of RS resources UsedRS A channel state information (CSI) report may be generated according to the RS resources. The CSI report may comprise a first part and a second part. UsedRS can be a positive integer value.

Description

[Technical Field]

[0001] The present disclosure relates generally to wireless communications, including, but not limited to, systems and methods for channel state information (CSI) reporting formats and omission rules in coherent cooperative transmission (CJT). [Background technology]

[0002] The 3rd Generation Partnership Project (3GPP®), a standards organization, is currently specifying a new air interface called 5G New Radio (5G NR) and the Next Generation Packet Core Network (NG-CN or NGC). 5G NR will have three major components: a 5G Access Network (5G-AN), a 5G Core Network (5GC), and a User Equipment (UE). To facilitate the enablement of different data services and requirements, elements of the 5GC, also called network functions, are being simplified, with some of them being software-based and some being hardware-based so that they can be adapted according to need. Summary of the Invention [Means for solving the problem]

[0003] The exemplary embodiments disclosed herein are directed to solving problems associated with one or more of the problems presented in the prior art and providing additional features that will become readily apparent by reference to the following detailed description when considered in conjunction with the accompanying drawings. According to various embodiments, exemplary systems, methods, devices, and computer program products are disclosed herein. It will be understood, however, that these embodiments are presented by way of example, and not limitation, and that various modifications to the disclosed embodiments may be made while remaining within the scope of the present disclosure, as will be apparent to those skilled in the art upon perusal of this disclosure.

[0004] At least one aspect is directed to a system, method, apparatus, or computer-readable medium. A wireless communication device (e.g., UE) receives N RS may receive a configuration (e.g., a CSI reporting configuration) associated with a set of N reference signal (RS) resources. RS may be a positive integer value. The wireless communication device receives N RS The wireless communication device may receive at least one RS corresponding to the N RS resources. RS N of RS resources UsedRS A channel state information (CSI) report may be generated according to the RS resources. The CSI report may comprise a first part and a second part. UsedRS may be a positive integer value. The wireless communication device may transmit the CSI report to the wireless communication node.

[0005] In some embodiments, N RS One of the RS resources may be associated with a ratio of the energy per resource element (EPRE) of the physical downlink shared channel (PDSCH) to the EPRE of the corresponding RS. The CSI may be determined according to the ratio. UsedRS The RS resource count can be determined based on the condition that the RS resource count is transmitted on the antenna ports of N UsedRS N RS Equal to or N RS Whether N is less than or equal to N can be determined according to the reporting mode parameter in the configuration. UsedRS Each of the RS resources may be associated with the same ratio of the EPRE of the PDSCH to the EPRE of the corresponding RS. When the reporting mode parameter is configured to be the first mode, at least one of the following applies: UsedRS is N RS or CSI can be equal to N RSWhen the reporting mode parameter is configured to be the second mode, at least one of the following applies: UsedRS is N RS or the wireless communication device may be configured to receive the N RS N of RS resources UsedRS The CSI may indicate N RS resources. UsedRS It can be determined according to the RS resources.

[0006] In some embodiments, the first moiety is N RS N selected from RS resources UsedRS The indicator may comprise an indicator of the RS resources. The indicator may comprise a bitmap. The bit size of the bitmap is N RS The bits of the bitmap, from the most significant bit (MSB) to the least significant bit (LSB), can be determined according to N in ascending or descending order of RS resource identifier (ID) or RS resource order. RS The bitmap may be mapped to RS resources. A first value of a bit of the bitmap (e.g., bit value 1) may indicate that the corresponding RS resource is selected. A second value of the bit (e.g., bit value 0) may indicate that the corresponding RS resource is not selected. The at least one criterion for selecting RS resources configured in the configuration (e.g., CSI reporting configuration) may include at least one of the following: a maximum number of RS resources in the set should be selected; a minimum number of RS resources in the set should be selected; a first combination of one or more RS resources from the set cannot be selected; or a second combination of one or more RS resources from the set can be selected.

[0007] In some embodiments, at least one of the following applies: Radio Resource Control (RRC) parameters are RS the RRC parameter is configured to indicate that selection of RS resources for CSI determination is disabled; and N RS RS resources consist of one RS resource for channel measurement, or N RS When =1, N UsedRS The RS resource indicator field may be absent or may have a zero bit size. When at least one of the following applies: the radio resource control (RRC) parameters are N RS When the RRC parameters are configured to indicate that all or a subset of RS resources should be used for CSI determination, when the RRC parameters are configured to indicate that RS resource selection for CSI determination is enabled, RS When the RS resources comprise more than one RS resource for channel measurement, or N RS is greater than 1, N UsedRS There may be a field for an indicator of the RS resource.

[0008] In some embodiments, the first portion may comprise an indicator of a parameter combination to be selected from a set of parameter combinations. RS The indicator may comprise at least one of the number of spatial domain (SD) bases, frequency domain (FD) base coefficients, or non-zero coefficient factors for each RS resource. [ka] wherein N L may be the number of parameter combinations in the set. The capability report for the wireless communication device may include a maximum number of parameter combinations to be configured in the configuration, N RSThe maximum number of selected SD bases across RS resources, or N UsedRS The SD bases may include at least one of the maximum number of selected SD bases across the RS resources.

[0009] In some embodiments, the first part includes an indicator of the number of non-zero coefficients (K NZ ) The indicator may include N RS RS resources or N UsedRS The indicator can be determined across N RS resources. RS RS resources or N UsedRS The bit width of the indicator can be determined according to at least one of a combination of parameters, K0, or a maximum allowable rank. K0 can be determined according to a function of M or β, a function of a maximum value to select, or N RS RS resources or N UsedRS The parameter combination may comprise a selected combination. The parameter combination may be determined across N RS resources. RS The indicator may include at least one of the number of spatial domain (SD) bases, frequency domain (FD) base coefficients, or non-zero coefficient factors for each RS resource. When the maximum allowed rank is 1, the bit width of the indicator is [ka] When the maximum allowed rank is not 1, the bit width of the indicator can be [ka] It could be.

[0010] In some embodiments, the indicator is N RS RS resources or N UsedRSmay be provided for each i-th RS resource, and at least one of the following applies: when the maximum allowed rank is 1, the bit width of the indicator for the i-th RS resource is [ka] or when the maximum allowed rank is not 1, the bit width of the indicator for the i-th RS resource may be [ka] K0 can be [ka] can be determined according to the formula: [ka] where P m may represent the FD basis coefficients under a given rank of m, or P v may represent the FD basis coefficient for the indicated rank in the CSI report, [ka] is the N RS may represent the total number of spatial domain (SD) bases across the RS resources, or [ka] is.

[0011] In some embodiments, K0 is [ka] can be determined according to the formula: [ka] where P i,j,v and P i,j,mmay represent the FD basis coefficients of the indicated rank, the i-th RS, and the j-th parameter combination in the CSI report, and the FD basis coefficients of the i-th RS and the j-th combination under the indicated rank or a given rank of m, respectively. In some embodiments, the first part may comprise an indicator of the RS resource corresponding to the strongest coefficient, and the bit width of the indicator may be [ka] It could be.

[0012] In some embodiments, P v The same value of Λ and the same value of beta (β) can be associated with each of the RSs. The maximum number of non-zero coefficients summed for one layer is [ka] The maximum number of non-zero coefficients summed across all layers can be determined according to [ka] where "Set of used RS(s)" can be determined according to N UsedRS may be determined according to RS resources, and J may correspond to a combination of parameters used for CSI determination; [ka] is the N for the J-th parameter combination used for CSI determination RS may represent the total number of spatial domain (SD) bases across the RS resources, or [ka] and [ka] where P v and Pm may represent the frequency domain (FD) basis coefficients for the indicated rank in the CSI report and the FD basis coefficients below a given rank of m, respectively.

[0013] In some embodiments, P v and β are respectively N RS The RS resources may have individual values ​​associated with each of the N RS resources. RS The maximum number of non-zero coefficients summed across RS resources is [ka] or across all layers, or all N RS The maximum number of non-zero coefficients summed across RS resources is: [ka] where "Set of used RS(s)" can be determined according to N UsedRS may be determined according to RS resources, and J may correspond to a combination of parameters used for CSI determination; [ka] where P i,J,v and P i,J,m may represent the FD basis coefficients of the combination of the indicated rank, the i-th RS, and the J-th parameter in the CSI report, and the FD basis coefficients of the i-th RS and the J-th combination under a given rank of m, respectively.

[0014] In some embodiments, the second part may comprise the number of non-zero coefficients provided for the i-th RS resource, summed across all layers. The bit width of the indicator for the i-th RS resource may be determined according to K0. When the maximum allowed rank is 1, the bit width for the i-th RS resource may be [ka] When the maximum allowed rank is not 1, the bit width for the i-th RS resource can be [ka] It can be. N UsedRS or N RS When is 1, the "Number of non-zero coefficients summed across all layers for the i-th RS resource" field may not be present. The i-th RS resource may have N UsedRS It may correspond to any of the RS resources.

[0015] In some embodiments, the second portion may comprise S number of groups, where S may be a positive integer. The first group of the second portion may include at least one indicator of a selected spatial domain (SD) basis. N UsedRS The number of indicators in the SD basis selected for each RS resource (N UsedRS ) may be present. The first indicator from the at least one indicator of the selected SD basis may comprise at least one of an indicator of a rotation coefficient for the SD basis and an indicator of an SD basis combination. The first group of the second part may include an indicator of an RS resource corresponding to the strongest coefficient, and the bit width of the indicator may be [ka] The first group of the second part may include an indicator of a spatial domain (SD) basis corresponding to the strongest coefficient. The first part may include an indicator of an RS resource corresponding to the strongest coefficient. The bit width of the indicator of the RS resource may be [ka] The bit width of the SD basis indicator can be [ka] The bit width of the SD basis indicator can be [ka] For rank 1, the bit width of the indicator of the SD basis can be [ka] For ranks other than 1, the bit width of the indicator of the SD basis can be [ka] It could be.

[0016] In some embodiments, the first group of the second part or the second part may include an indicator of the RS resource corresponding to the strongest coefficient, and at least one of the following applies: the bit width of the indicator of the RS resource is: [ka] The bit width of the indicator of the SD basis can be [ka] For rank 1, the bit width of the indicator of the SD basis can be [ka] or for ranks other than 1, the bit width of the indicator of the SD basis can be [ka] The indicator of the spatial domain (SD) basis corresponding to the strongest coefficient can be N UsedRS RS resources, and the bit width of the indicator is [ka] It could be.

[0017] In some embodiments, for rank 1, the bit width of the indicator is: [ka] or for rank other than 1, [ka] It could be.

[0018] In some embodiments, the CSI is N for the RS group with an index of t. UsedRS The first group of the second portion of CSI may comprise an indicator of one or more of the N RS resources, where t may be an integer. UsedRS The RS resource count may comprise an indicator of one or more of the N RS resources. UsedRS The number of one or more of the RS resources is a function of T or N. UsedRS / T, or [ka] T may be the total number of groups and may be a positive integer. UsedRS One or more of the RS resources form an RS group with an index of t=0, and N UsedRS The remainder of the RS resources may form an RS group with an index of t=1. The indicator may correspond to a bitmap, and the bit width may be the number of RS resources used. [ka] may correspond to the number of combinations with a bit width of 100 bits, where the bit width may be the number of RS resources used, and N tmay represent the number of RSs for the RS group with index t. The combination number may be a single parameter (e.g., a value of 31) to indicate more than one parameter (e.g., values ​​of 6 and 1). For example, the first value may be equal to floor(X / 5) and the second value may be equal to X%5.

[0019] In some embodiments, the RS group with an index of t=0 may comprise RS resources corresponding to the strongest coefficient. The RS group with an index of t=1 may comprise the remaining portion of the used RSs, excluding the RS resources corresponding to the strongest coefficient. Each RS group may have a separate priority level in terms of CSI omission. The priority values ​​for the non-zero coefficients corresponding to the RS group with an index of t in terms of CSI omission may be determined according to t. The number of RS groups may be 2. The second group of the second part may include indicators of one or more selected frequency domain (FD) bases, where at least one of the following applies: the indicators are N UsedRS For rank v transmission, if N3<=threshold, the bit width is [ka] For non-rank v transmissions, which may be bits, if N3 > threshold, the bit width is [ka] When the RS resource used for CSI determination is indicated by another indicator of the RS resource corresponding to the strongest coefficient among the coefficients, the bit width of the indicator may be [ka] bits, and the reference FD basis can be assumed to be 0, or when the RS used for CSI determination is indicated by another indicator, the bit width of the indicator is [ka] It could be.

[0020] In some embodiments, the second group of the second portion may include an indicator of a window of a selected frequency domain (FD) basis, and at least one of the following is true: the indicator of a window of a selected FD basis is N UsedRS The second group of the second part may comprise an indicator of the offset of the selected frequency domain (FD) basis, and at least one of the following applies: the at least one indicator is ... UsedRS The at least one indicator may provide an offset of the reference FD basis between one of the N RS resources and the reference RS resource. UsedRS The at least one indicator may provide an offset of the FD basis between one of the RS resources and the reference RS resource, where the individual offset may be an offset of a window of the selected FD basis between the individual RS resource and the reference RS resource, excluding the reference RS resource. UsedRS The number of indicators can be provided for one of the RS resources, and the number of indicators can be (N UsedRS -1), the reference RS resource may correspond to the strongest coefficient, and may be determined according to the indicator of the spatial domain (SD) basis corresponding to the strongest coefficient or the indicator of the RS resource corresponding to the strongest coefficient, and the bit width of at least one indicator may be: [ka] The second group of the second part may include reference amplitudes for at least one specific layer.

[0021] In some embodiments, the second group of the second portion may include at least one first group of amplitude values ​​for at least one non-zero coefficient. The first group of amplitude values ​​for the non-zero coefficient may be determined according to a priority function.

[0022] In some embodiments, the second group of the second portion may include at least one first group of phase values ​​for at least one non-zero coefficient. The first group of phase values ​​for the non-zero coefficient may be determined according to a priority function. The second group of the second portion may include at least one first group of indicators for the at least one non-zero coefficient. The first group of indicators for the non-zero coefficient may be determined according to a priority function. The first group may be N UsedRS The signal may comprise an indicator of one or more RSs from the RS resources, or at least one amplitude value corresponding to an RS resource indicated by at least one of the RSs corresponding to the strongest coefficient.

[0023] In some embodiments, the third group of the second portion may include at least one second group of amplitude values ​​for at least one non-zero coefficient. The second group of amplitude values ​​for the non-zero coefficient may be determined according to a priority function. The second group of the second portion may include at least one second group of phase values ​​for the at least one non-zero coefficient. The second group of phase values ​​for the non-zero coefficient may be determined according to a priority function.

[0024] In some embodiments, the second group of the second portion may include at least one second group of indicators for at least one non-zero coefficient. The second group of indicators for the non-zero coefficient may be determined according to a priority function. For the S groups of the second portion, in the order of the S groups, for each of the last S-1 or last S-2 groups of the second portion, there may be a corresponding t-th group of amplitude values ​​for the non-zero coefficients, phase values ​​for the non-zero coefficients, or indicators for the non-zero coefficients. When the CSI report cannot be carried entirely within the physical uplink shared channel (PUSCH), the wireless communication device may omit a portion of the second portion.

[0025] In some embodiments, a group in the second portion may have a lower priority for omission (e.g., a higher likelihood for being omitted) relative to another group that is earlier in the order or has a smaller group index within the second portion. A higher priority may mean / indicate a higher priority for transmission / retention in the CSI report (rather than being omitted). The wireless communication device may prioritize bits related to amplitude values ​​for non-zero coefficients, phase values ​​for non-zero coefficients, or indicators for non-zero coefficients to be carried in the PUSCH according to a priority function. A non-zero coefficient with the highest priority may have the lowest associated value of the priority function. The priority function may be a function of a layer index (l), a spatial domain (SD) basis index (i), a frequency domain (FD) basis index (f), or an RS group index (t) of one or more RS resources. For determining the value of the priority function, the RS group index may be more significant than at least one of the layer index, the SD basis index, or the FD basis index.

[0026] In some embodiments, when the number of layers is v, the number of SD bases is L, and the number of FD bases is Mv, the priority function is [ka] When the number of layers is v, the number of SD bases is L, and the number of FD bases is Mv, the priority function may be [ka] It could be.

[0027] In some embodiments, a wireless communication node (e.g., a BS) may notify a wireless communication device (e.g., a UE) of N RS A configuration (e.g., a CSI reporting configuration) associated with a set of N reference signal (RS) resources may be transmitted. RS may be a positive integer value. The wireless communication node receives N RS The wireless communication device may receive at least one RS corresponding to the N RS resources. RS N of RS resources UsedRS Generate a channel state information (CSI) report according to the RS resources, where the CSI report may comprise a first part and a second part. UsedRS can be a positive integer value. [Brief explanation of the drawings]

[0028] Various exemplary embodiments of the present solution are described in detail below with reference to the following figures or drawings. The drawings are provided for illustrative purposes only and merely depict exemplary embodiments of the present solution to facilitate the reader's understanding of the present solution. As such, the drawings should not be considered limiting of the scope, scope, or applicability of the present solution. It should be noted that for clarity and ease of illustration, the drawings are not necessarily drawn to scale.

[0029] [Figure 1]FIG. 1 illustrates an example cellular communication network in which the techniques disclosed herein may be implemented, according to certain embodiments of the present disclosure.

[0030] [Figure 2] FIG. 2 illustrates a block diagram of an example base station and user equipment device, in accordance with some embodiments of the present disclosure.

[0031] [Figure 3] FIG. 3 illustrates an example implementation of multi-transmit and receive point (TRP) based transmission for serving a single user equipment, in accordance with some embodiments of the present disclosure.

[0032] [Figure 4] FIG. 4 illustrates example cooperative precoding across different transmit and receive points (TRPs) for coherent cooperative transmission, in accordance with some embodiments of the present disclosure.

[0033] [Figure 5] FIG. 5 illustrates an example reference signal configuration for coherent cooperative transmission channel state information reporting in accordance with some embodiments of the present disclosure.

[0034] [Figure 6] FIG. 6 illustrates an example reference signal configuration for coherent cooperative transmission channel state information reporting in accordance with some embodiments of the present disclosure.

[0035] [Figure 7] FIG. 7 illustrates a flow diagram for generating a channel state information (CSI) report according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0036] Detailed Description 1. Mobile communication technology and environment 1 illustrates an exemplary wireless communication network and / or system 100 in which the techniques disclosed herein may be implemented, according to certain embodiments of the present disclosure. In the following discussion, the wireless communication network 100 may be any wireless network, such as a cellular network or a narrowband Internet of Things (NB-IoT) network, and is referred to herein as “network 100.” Such exemplary network 100 includes a base station 102 (hereinafter “BS 102,” also referred to as a wireless communication node), a user equipment device 104 (hereinafter “UE 104,” also referred to as a wireless communication device), and a cluster of cells 126, 130, 132, 134, 136, 138, and 140 overlaying a geographic area 101, which may communicate with each other via a communication link 110 (e.g., a wireless communication channel). In FIG. 1, the BS 102 and the UE 104 are contained within the respective geographic boundaries of the cell 126. Each of the other cells 130, 132, 134, 136, 138, and 140 may include at least one base station operating in its allocated bandwidth and providing adequate radio coverage to its intended users.

[0037] For example, the BS 102 may operate with an allocated channel transmission bandwidth to provide adequate coverage to the UE 104. The BS 102 and the UE 104 may communicate via downlink radio frames 118 and uplink radio frames 124, respectively. Each radio frame 118 / 124 may be further divided into subframes 120 / 127, which may include data symbols 122 / 128. In this disclosure, the BS 102 and the UE 104 are generally described herein as non-limiting examples of “communication nodes” that may practice the methods disclosed herein. Such communication nodes may be capable of wireless and / or wired communication in accordance with various embodiments of the present solution.

[0038] 2 illustrates a block diagram of an exemplary wireless communication system 200 for transmitting and receiving wireless communication signals (e.g., OFDM / OFDMA signals) in accordance with some embodiments of the present solution. System 200 may include components and elements configured to support known or conventional operational features not necessarily described in detail herein. In one illustrative embodiment, system 200 may be used to communicate (e.g., transmit and receive) data symbols within a wireless communication environment, such as wireless communication environment 100 of FIG. 1, as described above.

[0039] The system 200 generally includes a base station 202 (hereinafter “BS 202”) and a user equipment device 204 (hereinafter “UE 204”). The BS 202 includes a BS (base station) transceiver module 210, a BS antenna 212, a BS processor module 214, a BS memory module 216, and a network communication module 218, each of which is coupled and interconnected, as needed, via a data communication bus 220. The UE 204 includes a UE (user equipment) transceiver module 230, a UE antenna 232, a UE memory module 234, and a UE processor module 236, each of which is coupled and interconnected, as needed, via a data communication bus 240. The BS 202 communicates with the UE 204 via a communication channel 250, which may be any wireless channel or other medium suitable for the transmission of data as described herein.

[0040] As will be understood by those skilled in the art, system 200 may further include any number of modules other than those shown in FIG. 2 . Those skilled in the art will understand that the various illustrative blocks, modules, circuits, and processing logic described in connection with the embodiments disclosed herein may be implemented in hardware, computer-readable software, firmware, or any practical combination thereof. To clearly illustrate this interchangeability and compatibility of hardware, firmware, and software, the various illustrative components, blocks, modules, circuits, and steps are described generally in terms of their functionality. Whether such functionality is implemented as hardware, firmware, or software may depend on the particular application and design constraints imposed on the overall system. Those familiar with the concepts described herein may implement such functionality in a suitable manner for each particular application, but such implementation decisions should not be interpreted as limiting the scope of the present disclosure.

[0041] According to some embodiments, the UE transceiver 230 may be referred to herein as an “uplink” transceiver 230, including a radio frequency (RF) transmitter and an RF receiver, each with circuitry coupled to the antenna 232. A duplex switch (not shown) may alternatively couple the uplink transmitter or receiver to the uplink antenna in a time-duplexed manner. Similarly, according to some embodiments, the BS transceiver 210 may be referred to herein as a “downlink” transceiver 210, including an RF transmitter and an RF receiver, each with circuitry coupled to the antenna 212. A downlink duplex switch may alternatively couple the downlink transmitter or receiver to the downlink antenna 212 in a time-duplexed manner. The operation of the two transceiver modules 210 and 230 may be coordinated in time such that the downlink transmitter is coupled to the downlink antenna 212 at the same time that the uplink receiver circuitry is coupled to the uplink antenna 232 for reception of transmissions over the wireless transmission link 250. Conversely, the operation of the two transceivers 210 and 230 may be coordinated in time such that the uplink transmitter is coupled to the uplink antenna 232 at the same time that the downlink receiver is coupled to the downlink antenna 212 for reception of transmissions over the wireless transmission link 250. In some embodiments, there is close time synchronization, with minimal guard time between duplex direction changes.

[0042] The UE transceiver 230 and the base station transceiver 210 are configured to communicate over a wireless data communication link 250 and cooperate with suitably configured RF antenna arrays 212 / 232 capable of supporting a particular wireless communication protocol and modulation scheme. In some demonstrative embodiments, the UE transceiver 210 and the base station transceiver 210 are configured to support industry standards such as Long Term Evolution (LTE) and emerging 5G standards, and the like. However, it should be understood that the present disclosure is not necessarily limited in application to a particular standard and associated protocol. Rather, the UE transceiver 230 and the base station transceiver 210 may be configured to support alternative or additional wireless data communication protocols, including future standards or variations of future standards.

[0043] According to various embodiments, the BS 202 may be, for example, an evolved NodeB (eNB), a serving eNB, a target eNB, a femto station, or a pico station. In some embodiments, the UE 204 may be embodied in various types of user devices, such as a mobile phone, a smartphone, a personal digital assistant (PDA), a tablet, a laptop computer, a wearable computing device, etc. The processor modules 214 and 236 may be implemented or realized with a general-purpose processor, an associative memory, a digital signal processor, an application-specific integrated circuit, a field-programmable gate array, any suitable programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof, designed to perform the functions described herein. As such, the processor may be realized as a microprocessor, a controller, a microcontroller, a state machine, or the like. The processor may also be implemented as a combination of computing devices, e.g., a digital signal processor and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a digital signal processor core, or any other such configuration.

[0044] Furthermore, the steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in firmware, in a software module executed by processor modules 214 and 236, respectively, or in any practical combination thereof. Memory modules 216 and 234 may be realized as RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. In this regard, memory modules 216 and 234 may be coupled to processor modules 210 and 230, respectively, such that processor modules 210 and 230 may read information from, and write information to, memory modules 216 and 234, respectively. Memory modules 216 and 234 may also be integrated within their respective processor modules 210 and 230. In some embodiments, memory modules 216 and 234 may include cache memory for storing temporary variables or other intermediate information during execution of instructions to be executed by processor modules 210 and 230, respectively. Memory modules 216 and 234 may also each include non-volatile memory for storing instructions to be executed by processor modules 210 and 230, respectively.

[0045] The network communications module 218 generally represents the hardware, software, firmware, processing logic, and / or other components of the base station 202 that enable bidirectional communications between the base station transceiver 210 and other network components and communication nodes configured to communicate with the base station 202. For example, the network communications module 218 may be configured to support Internet or WiMAX traffic. In a typical deployment, without limitation, the network communications module 218 provides an 802.3 Ethernet interface so that the base station transceiver 210 may communicate with conventional Ethernet-based computer networks. As such, the network communications module 218 may include a physical interface for connection to a computer network (e.g., a mobile switching center (MSC)). As used herein with respect to specified operations or functions, the terms “configured for,” “configured to,” and conjugations thereof, refer to devices, components, circuits, structures, machines, signals, etc. that are physically constructed, programmed, formatted, and / or arranged to perform the specified operations or functions.

[0046] The Open Systems Interconnection (OSI) model (referred to herein as the "Open Systems Interconnection Model") is a conceptual and logical layout that defines network communications used by systems (e.g., wireless communication devices, wireless communication nodes) that open the system to interconnect and communicate with other systems. The model is divided into seven subcomponents or layers, each representing a conceptual collection of services provided to the layers above and below it. The OSI model also defines logical networks and effectively describes computer packet transfers by using different layer protocols. The OSI model may also be referred to as the seven-layer OSI model or seven-layer model. In some embodiments, the first layer may be the physical layer. In some embodiments, the second layer may be the medium access control (MAC) layer. In some embodiments, the third layer may be the radio link control (RLC) layer. In some embodiments, the fourth layer may be the packet data convergence protocol (PDCP) layer. In some embodiments, the fifth layer may be the radio resource control (RRC) layer. In some embodiments, the sixth layer may be a non-access stratum (NAS) layer or an Internet Protocol (IP) layer, and the seventh layer may be another layer.

[0047] Various exemplary embodiments of the present solution are described below with reference to the accompanying figures to enable those skilled in the art to make and use the present solution. As will be apparent to those skilled in the art after reading this disclosure, various changes or modifications of the examples described herein can be made without departing from the scope of the present solution. Thus, the present solution is not limited to the exemplary embodiments and applications described and illustrated herein. Additionally, any specific order or hierarchy of steps in the methods disclosed herein is merely an example approach. Based on design preferences, the specific order or hierarchy of steps in a disclosed method or process can be rearranged while remaining within the scope of the present solution. Thus, those skilled in the art will understand that the methods and techniques disclosed herein present various steps or acts in a sample order, and that the present solution is not limited to the specific order or hierarchy presented, unless expressly stated otherwise. 2. System and method for channel state information (CSI) reporting format and omission rules in coherent cooperative transmission (CJT)

[0048] In 5G New Radio (NR), for implementation deployment, most efforts have focused on multi-TRP transmission using single transmit and receive point (TRP) transmission and non-coherent cooperative transmission (NC-JT). Multi-TRP transmission can obtain some performance improvement over single-TRP transmission, for example for cell-edge UEs, with a moderate increase in implementation complexity. However, the benefit of having NC-JT may be limited in terms of average throughput improvement, especially considering the advanced transmission scheme of coherent cooperative transmission (CJT). Coherent cooperative transmission (CJT) can obtain distinctly different / optimal performance for multi-user multiple-input multiple-output (MU-MIMO) in multi-TRP operation.

[0049] Therefore, to support CJT (for FDD, e.g., FDD refarming in sub-GHz bands), this new technique of CSI reporting format and corresponding CSI omission rules in CJT can be considered. For example, the following issues can be investigated:

[0050] (1) A channel state information (CSI) codebook and corresponding parameters (e.g., the ratio of the energy per resource element (EPRE) of the physical downlink shared channel (PDSCH) to the channel state information reference signal (CSI-RS)) for re-establishing precoding information in the CJT-CSI can be considered based on a multi-TRP-CJT architecture. Unlike a CSI codebook (e.g., an eType II CSI codebook) for a single TRP (sTRP), the CJT-CSI codebook can provide TRP selection (e.g., selected CSI-RS resources (each selected CSI-RS resource may correspond to a TRP)) and can provide correlation information for CSI precoding across different TRPs according to a power offset between the PDSCH and the selected CSI-RS resources.

[0051] (2) To balance CSI reporting overhead (e.g., 200 to 2,000 bits) and MU-MIMO performance, dividing the CJT-CSI reporting format into different categories may be considered. The first information about the CJT-CSI codebook may have the highest priority and a fixed bit width, determined according to the CSI reporting configuration from the gNB side. The first information about the CJT-CSI codebook may clearly indicate the total number of bits for the remaining CSI portion. Other CSI portions (e.g., CSI portion 2 groups 0 to 2) may have different levels of priority. Based on the available physical uplink shared channel (PUSCH) resources, each group in CSI portion 2 may be carried in order. Once the payload size of the current PUSCH resource is exceeded, the corresponding lower-priority CSI portion may be omitted accordingly.

[0052] (3) Due to the multi-TRP (mTRP) operation, CSI omission rules (e.g., how to prioritize different bits in CSI part 2 by grouping different bits into different groups with different priorities) can be considered. The strongest TRP can mainly contribute to the throughput performance of the CJT CSI compared to other TRPs.

[0053] Multi-TRP operation can be considered as a new technique for balancing deployment costs and throughput / robustness at the expense of wide-area or ultra-wide-area spectrum resources and massive or very massive MIMO at a single TRP site. An example of multi-TRP operation is provided, as shown in FIG. 3. In such cases, particularly for cell-edge UEs in frequency division duplex (FDD) or time division duplex (TDD), CSI information (e.g., precoding matrix indicator (PMI), rank indicator (RI), or channel quality indicator (CQI)) for determining DL precoding can be reported from the UE to the gNB. For a single layer (or DMRS port), precoding can be provided across DL Tx antennas from multiple TRPs, as appropriate.

[0054] 4 shows an exemplary transmission scheme for multi-user multiple-input multiple-output (MU-MIMO) in coherent cooperative transmission (CJT). To achieve ideal precoding, complete channel-related information H can be considered, regardless of zero-forcing or signal-to-leakage-and-noise-ratio (SLNR) mechanisms. In addition to the right eigenvector V in H, the left eigenvector U and eigenvalue vectors can be used to reconstruct the channel accordingly.

[0055] SLNR is [ka] where: [ka] is.

[0056] For S-layer transmission for the i-th UE, the precoding information is [ka] can be given by

[0057] "RS" may be a CSI-RS, a synchronization signal block (SSB), or a sounding reference signal (SRS). "Time unit" may be a subsymbol, a symbol, a slot, a subframe, a frame, or a transmission occasion. "CSI" may comprise at least one of "precoding information," "PMI," "CQI," and / or "RI." "Precoding parameters" may be equivalent to parameters of a CSI codebook, parameters related to a precoding matrix indicator (PMI), or parameters related to a PMI codebook. "Precoding information" may be equivalent to a precoding matrix indicator (PMI) or a transmit precoding matrix indicator (TPMI). "TRP" may be equivalent to an RS port, an RS port group, an RS resource, or an RS resource set. Implementation Example 1: Reference Signal Configuration and Channel State Information (CSI) Reporting for Coherent Joint Transmission (CJT)

[0058] Regarding channel state information (CSI) codebooks / reports for coherent cooperative transmission (CJT), a mechanism for distinguishing different TRPs may be provided by using different CSI-RS resources (e.g., CSI-RS for channel measurement). In a CSI-RS resource set for channel measurement, there may be a number of CSI-RS resources (NCSI-RS). In such a case, a CSI-RS resource may correspond to a TRP / TRP group. On the other hand, for interference measurement, a non-zero power (NZP) interference measurement resource (IMR) (NZP-IMR) (e.g., CSI-RS for interference measurement or zero power IMR (ZP-IMR)) may be configured. CSI (e.g., PMI, RI, or CQI) may be derived according to all or a subset of the CSI-RS resources in the set according to a reporting mode parameter in the CSI reporting configuration.

[0059] After receiving a CSI reporting configuration associated with a reference signal (RS) (e.g., CSI-RS, ZP-IMR, and / or NZP-IMR for channel measurement), the UE may receive the reference signal according to the CSI reporting configuration. The UE may determine a CSI report. The CSI report may comprise at least one of CSI part 1 or CSI part 2. The UE may transmit the CSI report to the gNB side.

[0060] In some embodiments, one of the RSs in the set can be associated with a ratio (e.g., powerControlOffset) of the energy per resource element (EPRE) of the PDSCH to the reference signal (RS). For example, the ratio of the PDSCH EPRE to the RS may be the ratio of the PDSCH EPRE to the CSI-RS EPRE (e.g., NZP-CSI-RS). In some embodiments, with respect to CSI determination, the UE may assume that the PDSCH (e.g., all layers) is transmitted on one or more antenna ports of RS resources from the RS according to the EPRE ratio.

[0061] In some embodiments, the one or more RS resources used for CSI determination may be a subset or all of the RS resources in the set, depending on a reporting mode parameter in the CSI reporting configuration. If the reporting mode parameter is configured to be based on all of the CSI-RS resources in the set, the CSI (e.g., PMI, RI, or CQI) may be determined according to all of the CSI-RS resources. Otherwise, if the reporting mode parameter is configured to be based on a subset of the CSI-RS resources in the set, the UE may indicate the subset of CSI-RS resources (e.g., using a CSI-RS resource indicator via a bitmap corresponding to the CSI-RS resources in the set). The CSI (e.g., PMI, RI, or CQI) may be determined according to the subset of the CSI-RS resources.

[0062] In some embodiments, all of the RSs in the set or one or more RS resources used for CSI determination may be associated with the same power ratio to the PDSCH RS (e.g., the ratio of PDSCH EPRE to NZP CSI-RS EPRE).

[0063] 5 illustrates an example reference signal configuration for coherent cooperative transmission (CJT) channel state information reporting (e.g., a CSI-RS resource set for channel measurements) in accordance with some embodiments of the present disclosure. A separate PDSCH to CSI-RS EPRE ratio may be provided for each CSI-RS resource in the set. To facilitate CSI determination in CJT and reduce the complexity of UE-side CSI derivation, all of the CSI-RS resources in the set or all of the CSI-RS resources used for CSI determination (e.g., a subset or all of the RS resources in the set) may be associated with the same power ratio.

[0064] For CJT CSI, the following CSI codebook for constructing a precoding matrix (eg, PMI) can be provided:

[0065] Case 1: SD / FD basis selection per TRP. SD / FD basis selection per TRP can allow for independent FD basis selection across N TRPs / TRP groups. UsedRS may represent the number of RS resources selected / used for CSI determination (e.g., the number of CSI-RS resources from the CSI-RS resource set), [ka] is.

[0066] Case 2: SD basis selection per TRP and cooperative / common (across N TRPs) FD basis selection. [ka] is.

[0067] Then, to balance the CSI reporting overhead (e.g., 200 to 2,000 bits) and codebook performance, dividing the CJT-CSI reporting format into different categories needs to be considered. The following parameters can be captured in the CJT-CSI reporting format to be reported from the UE to the gNB (i.e., initial categories for CSI part 1 and CSI part 2):

[0068] CSI Part 1: CSI Part 1 may carry the first / most essential precoding parameters in CJT-CSI (including at least the channel quality information (CQI) (wideband or subband), the rank indicator (RI), and a portion of the precoding parameters (e.g., for W2, e.g., the number of non-zero coefficients summed across all layers)). CSI Part 1 may have the highest priority and a fixed bit width, determined according to the CSI reporting configuration from the gNB side. The total number of bits (per group in CSI Part 2) can be calculated according to the portion of the precoding parameters in CSI Part 1.

[0069] CSI Part 2: CSI Part 2 may comprise a number of groups in CSI Part 2 (e.g., CSI Part 2 Groups 0-2). The first group may include a plurality of wideband (WB) parameters associated with a CSI codebook. One of the remaining groups may include a plurality of subband (SB) parameters associated with a CSI codebook. In CSI Part 2, the number of groups in CSI Part 2 (e.g., CSI Part 2 Groups 0-2) may have different levels of priority. Based on the payload size of the available PUSCH resources for CSI reporting, the groups in CSI Part 2 may be carried in order. Once the maximum payload size of the current PUSCH resource is exceeded, the corresponding CSI part of a lower priority may be omitted.

[0070] For example, Table 1 illustrates an example CSI reporting format in coherent cooperative transmission (CJT). The CSI portion may include at least one of the S groups in CSI portion 1 or CSI portion 2. [Table 1]

[0071] In the following implementation example, the above CSI parts and corresponding CSI omission rules are discussed.

[0072] In implementation example 2, details about the reporting format for CSI part 1 can be found. In implementation example 3, details about the reporting format for CSI part 2 can be found. In implementation example 4, CSI omission rules can be found for one or more CSI-RS resources used to derive the CSI. Implementation Example 2: Reporting Format for CSI Part 1

[0073] In this implementation example, details about the reporting format for CSI Part 1 are detailed. CSI Part 1 includes the following: an indicator of one or more RS resources selected from a set of RS resources; an indicator of a parameter combination to be selected or used for CSI determination; an indicator of the number of non-zero coefficients (K NZ ), or an indicator of an RS resource corresponding to the strongest one of the coefficients.

[0074] CSI part 1 may comprise an indicator of one or more RS resources selected from the set of RS resources. The indicator of one or more RS resources selected from the set of RS resources may be an indicator of the selected CSI-RS resource. UsedRS RS resources (e.g., CSI-RS resources) in the set RSRS resources (e.g., CSI-RS resources) in the set can be selected from the set of RS resources (e.g., CSI-RS resources). The selected CSI-RS resources can be used to derive CSI (e.g., CSI determination). In some embodiments, the indicator of the selected RS resources may comprise a bitmap. The bit size of the bitmap is proportional to the number of RS resources in the set (e.g., N RS (eg, for channel measurements).

[0075] In some embodiments, there may be a mapping between the bits of the bitmap from most significant bit (MSB) to least significant bit (LSB) and at least one of the RS resources according to an order. In other words, the bits of the bitmap from MSB to LSB may be mapped to at least one of the following according to an order: from the RS resource with the lowest ID to the RS resource with the highest ID, from the RS resource with the highest ID to the RS resource with the lowest ID, from the first RS resource to the last RS resource, or from the last RS resource to the first RS resource. A "1" in a bit of the bitmap may indicate / indicate that the RS associated with the bit is selected. Otherwise, a "0" in a bit of the bitmap may indicate / indicate that the RS associated with the bit is not selected.

[0076] In some embodiments, if at least one of the following conditions is met, the "Indicator of Selected RS Resource" field may not be present or the bit size of the field may be zero:

[0077] Condition #1: RRC parameters are configured such that all RSs for channel measurements (eg, in a set) can be used to derive CSI.

[0078] Condition #2: RRC parameters are configured such that RS selection for CSI determination is disabled.

[0079] Condition #3: There is only one RS resource for channel measurement in the set.

[0080] In some embodiments, at least one of the following may be configured as a criterion for selecting an RS resource in a CSI report (eg, a CSI-RS resource for channel measurements):

[0081] Criterion 1: The maximum number of RS resources in the set that can be selected.

[0082] Criterion 2: The minimum number of RS resources in the set that can be selected.

[0083] Criterion 3: One or more combinations of RS resources in a set may not be selected in a CSI report. For example, there may be four TRPs (e.g., four CSI-RS resources in a set), such as TRP1 / 2 / 3 / 4. TRP1 and TRP2 may be used together for CJT-CSI as TRP group 1. TRP3 and TRP4 may be used together for CJT-CSI as TRP group 2, but TRPs from different groups may not be used for CJT-CSI. From a signaling perspective, it may be configured such that {TRP1, TRP3}, {TRP1, TRP4}, {TRP2, TRP3}, and {TRP2, TRP4} may not be indicated simultaneously in a CSI report.

[0084] Criterion 4: One or more combinations of RS resources in the set that can be selected in a CSI report. For example, there can be four TRPs, such as TRP1 / 2 / 3 / 4. TRP1 and TRP2 can be used together for CJT-CSI as TRP group 1. TRP3 and TRP4 can be used together for CJT-CSI as TRP group 2. TRPs from different groups may not be used for CJT-CSI. From a signaling perspective, it can be configured so that {TRP1, TRP2} and {TRP3, TRP4} can be indicated simultaneously in a CSI report.

[0085] CSI portion 1 may comprise an indicator of a parameter combination to be selected or used for CSI determination. The indicator of a parameter combination to be selected or used for CSI determination may be from a plurality of candidate combinations. In some embodiments, the parameter combination indicator may indicate a parameter combination associated with the CSI. For example, the indicator may be referred to as an indicator of a parameter combination for deriving CSI or precoding information. The parameter combination may be a number of SD bases per RS ​​resource (e.g., {L 1, L2,...,L N_RS}), FD basis coefficients (e.g., P v or P m ), or a non-zero coefficient factor (e.g., beta). In other words, with respect to the number of SD bases (L), L i,j may represent the number of selected SD bases for the ith CSI-RS / TRP in the jth parameter combination. In such a case, Pv may represent the frequency domain (FD) basis coefficients to be indicated in the CSI report (e.g., determining the number of FD bases), and beta may represent a factor for determining the number of non-zero coefficients.

[0086] At the RRC level, multiple parameter combinations (e.g., N L) can be configured. The UE side can indicate one of the parameter combinations. The bit width for this indicator is [ka] It could be.

[0087] In some embodiments, to support different types of UE implementations, at least one of the following may be reported as in the UE capability signaling: a maximum number of parameter combinations to be configured in a CSI reporting configuration, a maximum number of selected SD bases across CSI-RS resources (e.g., in a parameter combination), or a maximum number of selected spatial domain (SD) bases across selected CSI-RS resources (e.g., in a parameter combination). The maximum number of selected SD bases across CSI-RS resources may be reported as in the UE capability signaling, based on the number of selected SD bases across CSI-RS resources {L1, L2, ..., L N_RS} can be a maximum number of total

[0088] CSI Part 1 may comprise an indicator of the number of non-zero coefficients. The indicator of the number of non-zero coefficients is K NZ The number of non-zero coefficients may be determined across all layers. The indicator of the number of non-zero coefficients may comprise / point to the total number of non-zero coefficients summed across all layers.

[0089] In some embodiments, the indicator may be a CSI report (e.g., N UsedRS The RS resource count may be determined across all selected RS resources (eg, all selected CSI-RS resources) associated with the selected CSI-RS.

[0090] In some embodiments, K NZ The bit width of L1 depends on the parameter combination, e.g., {L1,L2,...,L N_RS}, P v, and / or beta. In some embodiments, the parameter combination may comprise a selected parameter combination.

[0091] In some embodiments, an indicator of the total number of non-zero coefficients (K NZ The bit width of K can be determined according to at least one of K and the maximum allowed rank. When the maximum allowed rank is 1, the bit width is [ka] otherwise, the bit width is [ka] It can be. P v and beta (β) may be TRP common (e.g., the same value associated with each of the CSI-RS resources). [ka] can be determined according to

[0092] moreover, [ka] P v and P m may represent the FD basis coefficients for the indicated rank in the CSI report and the FD basis coefficients under a given rank of m (e.g., the rank can be assumed to be m=1).

[0093] In such cases, [ka] may represent the total number of spatial domain (SD) bases across the CSI-RS resources in the set, i.e., [ka] To ensure bit-width consistency, the above sum is UsedRS Instead, 1 to N RS It could be.

[0094] In some embodiments, P v and beta (β) may be TRP specific (e.g., individual values ​​associated with each of the CSI-RS). K0 is calculated using the following formula: [ka] can be determined according to

[0095] moreover, [ka] P i,j,v and P i,j,m may represent the FD basis coefficients of the i-th RS and j-th parameter combination under the indicated rank in the CSI report (e.g., the rank can be assumed to be m=1). i,j The above sum over N UsedRS Instead, 1 to N RS It could be.

[0096] In some embodiments, an indicator may be provided per RS, e.g., per N CSI-RS resources. NZ The bit width of L1 depends on the parameter combination, e.g., {L1,L2,...,L N_RS}, P v , P m , and beta. Further, the parameter combination may comprise a selected parameter combination. K NZ The bit width of can be determined according to K0 and the maximum allowed rank. When the maximum allowed rank is 1, the bit width for the i-th RS resource is [ka] In an embodiment, the bit width for the i-th RS resource may be [ka] It could be.

[0097] CSI portion 1 may comprise an indicator of the RS resource corresponding to the strongest one of the coefficients. The "indicator of the RS resource corresponding to the strongest coefficient" may be included in CSI portion 2 (e.g., first group or CSI portion 2 group 0). This parameter may be used to determine the strongest coefficient and / or bit size of the CSI group in CSI portion 2. The bit width of the "indicator of the CSI-RS resource corresponding to the strongest coefficient" may be [ka] It could be.

[0098] In some embodiments, P v and beta (β) may be TRP common (e.g., the same value may be associated with each of the CSI-RS) without further indication in the CSI report. The maximum number of non-zero coefficients summed for one layer (e.g., across all RS resources used to derive the CSI) is: [ka] can be determined according to

[0099] The maximum number of non-zero coefficients summed across all layers (e.g., across all RS resources used to derive CSI) is: [ka] The set of RSs (e.g., selected TRP / CSI-RS) to be used may be determined according to an indicator of the selected RS resources, if any. J may be determined according to an indicator of the parameter combination. [ka] may represent the total number of SD bases across the CSI-RS resources in the set for the J-th parameter combination. [ka]

[0100] moreover, [ka] where P v and P m may represent the FD basis coefficients for the indicated rank in the CSI report and the FD basis coefficients under a given rank of m (e.g., the rank can be assumed to be m=1).

[0101] In some embodiments, P v and beta (β) may be TRP specific (e.g., individual values ​​associated with each of the CSI-RS). The maximum number of non-zero coefficients summed for one layer (e.g., across all RS resources used to derive the CSI) is: [ka] The maximum number of non-zero coefficients summed across all layers (e.g., across all RS resources used to derive CSI) can be determined according to: [ka] The set of RSs (e.g., selected TRPs) to be used may be determined according to a CSI-RS resource indicator, if any, and J may be determined according to a parameter combination indicator.

[0102] moreover, [ka] P i,J,v and P i,J,m may represent the FD basis coefficients of the indicated rank, the i-th RS, and the j-th parameter combination (used) in the CSI report, and the FD basis coefficients of the i-th RS and the J-th parameter combination (used) under a given rank of m (e.g., the rank can be assumed to be m=1).

[0103] In some embodiments, in CSI-RS Part 2, the number of non-zero coefficients summed across all layers for each selected RS resource may be provided individually (e.g., an indicator of the number of non-zero coefficients for the selected RS resource).

[0104] The i-th CSI-RS resource (e.g., 1st to Nth UsedRS -1), the last one can be calculated accordingly. If the maximum allowed rank is 1, the corresponding bit width is [ka] Otherwise, the bit width can be [ka] Furthermore, if the following condition is met, namely, the number of CSI-RSs in the selected CSI-RS or set is 1, the "Number of non-zero coefficients summed across all layers per selected CSI-RS resource" field may not be present.

[0105] For example, Table 2 illustrates exemplary precoding parameters in CSI part 1 in the CJT based on the above analysis, in addition to the subband / wideband CQI and RI. [Table 2-1] [Table 2-2] Implementation Example 3: Reporting Format for CSI Part 2

[0106] In this implementation example, details about the reporting format for CSI Part 2 are detailed. For CSI Part 2, S groups may be included, where S may be a positive integer (e.g., S=3 or 4).

[0107] For example, CSI portion 2 may have four groups for a given CSI report as shown in Table 3. In some embodiments, there may be CSI omission priority rules for the individual groups.

[0108] CSI Part 2 Group 0 can be prioritized over CSI Part 2 Group 1, CSI Part 2 Group 2, or CSI Part 2 Group 3.

[0109] CSI Part 2 Group 1 can be prioritized over CSI Part 2 Group 2 or CSI Part 2 Group 3.

[0110] CSI Part 2 Group 2 may be prioritized over CSI Part 2 Group 3.

[0111] [Table 3-1] [Table 3-2]

[0112] A first group in CSI portion 2 (e.g., CSI portion 2 group 0) may include at least one of an indicator of a selected spatial domain (SD) basis, an indicator of an RS resource corresponding to the strongest one of the coefficients, an indicator of a spatial domain (SD) basis corresponding to the strongest one of the coefficients, or an indicator of one or more RS resources for the t-th group.

[0113] The first group in CSI portion 2 may include at least one indicator of a selected spatial domain (SD) basis. The at least one indicator of a selected spatial domain (SD) basis may be for an individual RS resource used for CSI determination. In some embodiments, N of the SD bases selected for each RS resource used for CSI determination may be UsedRS For example, when the indicator of the selected RS resource is present in the CSI report, the indicator of the selected SD basis for the i-th RS resource may belong to the i-th selected RS set indicated by the "indicator of the selected RS resource."

[0114] In some embodiments, the indicator of the selected SD basis may comprise at least one of an indicator of a rotation factor for the SD basis and an indicator of an SD basis combination (eg, by a combination number mechanism).

[0115] Indicators of rotation coefficients with respect to SD basis (e.g., i 1,1,i ) is the bit width, [ka] bits. O1 and O2 may represent oversampling factors for the vertical and horizontal axes, respectively.

[0116] Indicators of SD basis combinations (e.g., i 1,2,i ) is the bit width, [ka] bits. N1 and N2 may represent the number of vertical and horizontal antenna elements, respectively. L i,J may represent the determined number of SD bases for the i-th RS used for CSI determination.

[0117] The first group in CSI portion 2 may include an indicator of the RS resource corresponding to the strongest coefficient among the coefficients. For CSI portion 2, this parameter can be used to determine the strongest coefficient and / or bit size of the CSI group. In such a case, when an indicator of the SD basis is in CSI portion 2 (e.g., in CSI portion 2 group 0), the bit width of the "indicator of the CSI-RS resource corresponding to the strongest coefficient" is [ka] It could be.

[0118] The first group in CSI portion 2 may include an indicator of a spatial domain (SD) basis corresponding to the strongest coefficient of the coefficients. The "indicator of the RS resource corresponding to the strongest coefficient" may be in CSI portion 1. The "indicator of the SD basis corresponding to the strongest coefficient" may be in CSI portion 2 (e.g., CSI portion 2 group 0).

[0119] The bit width of the "CSI-RS resource indicator corresponding to the strongest coefficient" is [ka] It could be.

[0120] The bit width of the "SD basis indicator corresponding to the strongest coefficient" is [ka] It could be.

[0121] In one embodiment, regardless of rank, the bit width is always [ka] It could be.

[0122] For rank 1, the bit width is [ka] Otherwise, the bit width can be [ka] It could be.

[0123] In some embodiments, the “indicator of the RS resource corresponding to the strongest coefficient” and the “indicator of the SD basis corresponding to the strongest coefficient” may both be in CSI part 2. The bit width of the “indicator of the RS resource corresponding to the strongest coefficient” may be [ka] The bit width of the "SD basis indicator corresponding to the strongest coefficient" can be [ka] It can be a bit.

[0124] For rank 1, the bit width is [ka] Otherwise, the bit width can be [ka] It could be.

[0125] In some embodiments, there may not be any "indicator of the RS resource corresponding to the strongest coefficient." Only an indicator for the "indicator of the SD basis corresponding to the strongest coefficient per layer" across different polarizations across the RS resources used for CSI determination may be included.

[0126] The bit width of the "SD basis indicator corresponding to the strongest coefficient per layer" is [ka] It could be.

[0127] For rank 1, the bit width is [ka] Otherwise, the bit width can be [ka] It could be.

[0128] The first group in CSI portion 2 may include an indicator of one or more RS resources for the t group. The one or more RS resources may be from the RS resources used for CSI determination (e.g., for the t group). t may be an integer, such as 0 to 1.

[0129] The number of one or more CSI-RSs is [ka] T may be the total number of groups (e.g., 2). Each of the T groups may have an individual priority level in terms of CSI omission. When T=2, the indicator may be a bitmap (i.e., bit=1) or [ka] This can be achieved by the number of combinations with a bit width of 10 bits. The bit width of the bit map can be the number of RSs used. t may represent the number of RSs for the tth group. The remainder of the selected CSI-RS may comprise t=1 groups. Additionally, the indicator may indicate one or more RS resources for the s=0th group. The RS resource corresponding to the strongest coefficient may be in the s=0th group.

[0130] In some embodiments, the group with t=0 may comprise the RS resources corresponding to the strongest coefficients, and the group with t=1 may comprise the remainder of the CSI-RS used.

[0131] 5 illustrates an example reference signal configuration for coherent cooperative transmission channel state information reporting in accordance with some embodiments of the present disclosure. There may be N CSI-RS resources in the CSI-RS set for channel measurements for CJT. Based on the "selected RS resource indicator" in CSI Part 1, N UsedRS CSI-RS resources can be selected. In CSI Part 2, to facilitate CSI omission, the used RS resources can be further divided into two groups. The precoding parameters for the t=0th group (e.g., parameters in CSI Part 2 Group 1 / 2) can be prioritized over the t=1 group. Further details can be found in Implementation Example 4.

[0132] Table 4 illustrates example precoding parameters within the first group of CSI part 2 (e.g., CSI part 2 group 0) in the CSI reporting format in CJT. [Table 4-1] [Table 4-2]

[0133] A second group in CSI portion 2 (e.g., CSI portion 2 group 1) may include at least one of indicators of one or more selected frequency-domain (FD) bases, indicators of windows of one or more selected frequency-domain (FD) bases, indicators of offsets of one or more frequency-domain (FD) bases, a reference amplitude for layer l, a first group of amplitude values ​​for non-zero coefficients, a first group of phase values ​​for non-zero coefficients, or a first group of indicators for non-zero coefficients.

[0134] The second group in CSI portion 2 may include one or more selected frequency domain (FD) basis indicators. The one or more selected frequency domain (FD) basis indicators may include i 1,6,l It could be.

[0135] In some embodiments, an indicator of the selected FD basis can be provided for each layer l. The indicator of the selected FD basis is the N Used-RS The indicators of the selective FD bases may each correspond to an RS selected in order. An indicator of the selected FD bases may be provided for each RS used for CSI determination. For rank v transmission, if N3<= a threshold (e.g., 19), the bit width is [ka] bits, otherwise if N3>threshold (e.g., 19), the bit width is [ka] It can be a bit.

[0136] In some embodiments, if the RS used for CSI determination is indicated by the “indicator of the RS resource corresponding to the strongest coefficient”, the bit width is [ka] bits, otherwise the bit width is [ka] It can be a bit.

[0137] A second group in CSI part 2 may include an indicator of one or more selected frequency domain (FD) basis windows. This indicator may be reported if the number of subbands (e.g., N3) is greater than or equal to a threshold (e.g., 19). An indicator of the selected FD basis windows may be provided for each selected RS. The indicator may apply to all layers (e.g., layer-common, i 1,5 ), or may be provided per layer and be layer specific (e.g., i 1,5,l ) For rank v transmission, the bit width is [ka] bits, where: [ka] is.

[0138] The second group in CSI part 2 may include indicators of the offset of one or more frequency domain (FD) bases. The indicator of the offset for the used RS resources may provide the offset of the reference FD base between the used RS resources and the reference RS resources. In some embodiments, the indicator of the offset for the used RS resources may provide the offset of a window of the selected FD base between the used RS resources and the reference RS resources. The indicator may be provided for one of the selected RSs, excluding the reference RS resource. The indicator of the offset may be used RS specific. In such a case, the number of indicators may be "number of selected RSs - 1" (e.g., N UsedRS-1 ) can be.

[0139] In some embodiments, the reference RS resource may correspond to the strongest coefficient. The reference RS resource may be indicated by an indicator of the SD basis corresponding to the strongest coefficient or by an indicator of the RS resource corresponding to the strongest coefficient. The bit width is [ka] In some embodiments, the bit width may be [ka] bits, where b can be an integer (eg, 1, 2, 3, or 4) or can be provided in configurations.

[0140] Candidate values ​​for indicators of offsets between reference FD bases are [ka] The candidate values ​​of the at least one indicator of the offset between the reference FD bases may be in the range of 0 to N3-1 / b or in the range of 0 to N3b-1.

[0141] In an embodiment, the indicator of the offset of one or more frequency domain (FD) bases may also be referred to as an "indicator of the offset between the reference FD window for the i-th selected RS and the reference RS resource."

[0142] A second group in CSI part 2 may include reference amplitudes for layer 1. At least one of the following may be present:

[0143] Option 1: The reference amplitude for layer l may correspond to a subset (W2) of precoding matrices associated with another polarization different from that indicated by the "indicator of the SD basis corresponding to the strongest coefficient".

[0144] Option 2: The reference amplitude for layer l may comprise the reference amplitude for layer l for the CSI-RS selected for each polarization, except for the polarization indicated by the "SD basis indicator corresponding to the strongest coefficient."

[0145] The second group in CSI part 2 may include the first group of amplitude values ​​for the non-zero coefficients. 2,4,l,t ) can be determined according to a priority function.

[0146] For a rank v CSI, the number of amplitude values ​​in the first group is [ka] The bit width of the first group can be: [ka] wherein B ap may be a positive number and may represent the bit width (e.g., 3 bits) for the amplitude value. [ka] may have a higher priority based on the priority function.

[0147] The second group in CSI part 2 may include the first group of phase values ​​for the non-zero coefficients. 2,5,l,t ) can be determined according to a priority function.

[0148] For rank v CSI, the number of phase values ​​in the first group is [ka] The bit width of the first group can be: [ka] wherein B ph may be a positive number and may represent the bit width (e.g., 4 bits) for the amplitude value. [ka] may have a higher priority based on the priority function.

[0149] The second group in CSI part 2 may include the first group of indicators for non-zero coefficients. 1,7,l,t ) can be determined according to a priority function. For a rank v CSI, the size of the bitmap corresponding to the first group of indicators for non-zero coefficients is [ka] The first group [ka] may have a higher priority based on the priority function.

[0150] In some embodiments, the first group may comprise at least one of the following: an indicator of one or more RSs from the used RSs (e.g., an indicator of one or more RS resources for the first group) or an amplitude value corresponding to an RS resource indicated by at least one of the CSI-RS corresponding to the strongest coefficient (e.g., determined according to an indicator of a CSI-RS resource corresponding to the strongest coefficient).

[0151] Table 5 illustrates example precoding parameters in a second group (eg, CSI Part 2 Group 0) in CSI Part 2 in the CSI reporting format for CJT. [Table 5-1] [Table 5-2]

[0152] A third group in CSI portion 3 (e.g., CSI portion 2 group 2) may include at least one of a second group of amplitude values ​​for non-zero coefficients, a second group of phase values ​​for non-zero coefficients, or a second group of indicators for non-zero coefficients.

[0153] The third group in CSI portion 3 may include a second group of amplitude values ​​for the non-zero coefficients. 2,4,l,t ) can be determined according to a priority function.

[0154] For a rank v CSI, the number of amplitude values ​​in the first group is [ka] The bit width of the first group can be: [ka] wherein B ap may be a positive number and may represent the bit width (e.g., 3 bits) for the amplitude value. [ka] may have a lower priority based on the priority function.

[0155] The third group in CSI portion 3 may include a second group of phase values ​​for non-zero coefficients. 2,5,l,t ) can be determined according to a priority function. For a rank v CSI, the number of phase values ​​in the first group is [ka] The bit width of the first group can be: [ka] wherein B ph may be a positive number and may represent the bit width (e.g., 4 bits) for the amplitude value. [ka] may have a lower priority based on the priority function.

[0156] The third group in CSI portion 3 may include a second group of indicators for non-zero coefficients. 1,7,l,t ) can be determined according to a priority function. For a rank v CSI, the size of the bitmap corresponding to the second group of indicators for non-zero coefficients is [ka] The second group [ka] may have a higher priority based on a priority function. [Table 6]

[0157] In some embodiments, for an individual one of the last N or T CSI part 2 groups in the order, an amplitude value for a non - zero coefficient, a phase value for a non - zero coefficient, or an indicator for a non - zero coefficient, a corresponding t - th group of N + 1 CSI part 2 groups can exist (e.g., N = T).

[0158] The size of the "s - th group of the amplitude value for a non - zero coefficient and / or the phase value for a non - zero coefficient or the indicator for a non - zero coefficient" can be predetermined according to CSI part 1 or CSI part 2 group 0. The corresponding values can be mapped to individual groups based on priority rules. For example, four CSI part 2 groups (e.g., group 0, group 1,..., group 3) can exist. Three groups of the amplitude value for a non - zero coefficient, the phase value for a non - zero coefficient, or / and the indicator for a non - zero coefficient for individual groups 1, group 2, and group 3 can be included. Implementation Example 4: CSI Omission Rule

[0159] When a CSI report regarding CJT is carried on PUSCH, if the UE cannot fully carry the CSI report on PUSCH, the UE may omit a part of CSI part 2. In CSI part 2, S groups can exist. The i - th group in CSI part 2 can be prioritized over the j - th group in CSI part 2, where i < j. For example, the first group can be prioritized over the second and third groups in CSI part 2.

[0160] For a given CSI report for the CJT, the priority rule may be CSI Part 2 Group 0 > CSI Part 2 Group 1 > CSI Part 2 Group 2 (e.g., CSI Part 2 Group 0 may be prioritized over CSI Part 2 Group 1, and CSI Part 2 Group 1 may be prioritized over CSI Part 2 Group 2).

[0161] For a given CSI report for the CJT, the priority rule may be CSI Part 2 Group 0 > CSI Part 2 Group 1 > CSI Part 2 Group 2 > CSI Part 2 Group 3. CSI Part 2 Group 0 may be prioritized over CSI Part 2 Group 1. CSI Part 2 Group 1 may be prioritized over CSI Part 2 Group 2. CSI Part 2 Group 2 may be prioritized over CSI Part 2 Group 3.

[0162] For CSI part 2, amplitude values ​​for non-zero coefficients, phase values ​​for non-zero coefficients, and bits for indicators for non-zero coefficients may be prioritized based on a priority function.

[0163] The non-zero coefficient with the highest priority (regardless of the amplitude value, phase value, and indicator bitmap) may have the lowest associated value Pri(l,i,f,t). In the priority function Pri(l,i,f,t), l,i,f,t may be the layer index (e.g., l=1,2,..,v), the SD basis index (e.g., i=0,1,...,2L-1), the SD basis index (e.g., i=0,1,...,2L-1), the FD basis index (e.g., f=0,1,...,M v-1 ), the index of one or more groups of RS resources (e.g., t=0,1, or t=0,1...,N UsedRS , or t=0,1...,N RS ) may represent an index of one or more groups of RS resources (e.g., t=0, 1, or t=0, 1..., N UsedRS , or t=0,1...,N RS) may take precedence over at least one of a layer index (e.g., l=1, 2, .. , v), an SD-based index (e.g., i=0, 1, . . , 2L-1), an SD-based index (e.g., i=0, 1, . . , 2L-1), or an FD-based index. For example, an index of a group of one or more RS resources may take precedence over all of a layer index (e.g., l=1, 2, . . , v), an SD-based index (e.g., i=0, 1, . . , 2L-1), an SD-based index (e.g., i=0, 1, . . , 2L-1), and an FD-based index.

[0164] In some embodiments, the priority function is: [ka] The distance can be determined according to at least one of:

[0165] In one embodiment, the priority function is: [ka] can be determined according to

[0166] It should be understood that one or more features from the above implementation examples are not exclusive to a particular implementation example and may be combined in any manner (e.g., in any priority and / or order, in parallel, or otherwise).

[0167] 7 illustrates a flow diagram of a method 700 for channel state information (CSI) reporting formats and omission rules in coherent cooperative transmission (CJT). Method 700 may be implemented using any one or more of the components and devices detailed herein in conjunction with FIGS. 1-6. In overview, method 700 may, in some embodiments, be performed by a wireless communication device. Additional, fewer, or different operations may be performed in method 700, depending on the embodiment. At least one aspect of the operations is directed to a system, a method, an apparatus, or a computer-readable medium.

[0168] A wireless communication device (e.g., UE) receives N RS may receive a configuration (e.g., a CSI reporting configuration) associated with a set of N reference signal (RS) resources. RS may be a positive integer value. The wireless communication device receives N RS The wireless communication device may receive at least one RS corresponding to the N RS resources. RS N of RS resources UsedRS A channel state information (CSI) report may be generated according to the RS resources. The CSI report may comprise a first part and a second part. UsedRS may be a positive integer value. The wireless communication device may transmit the CSI report to the wireless communication node.

[0169] In some embodiments, N RS One of the RS resources may be associated with a ratio of the energy per resource element (EPRE) of the physical downlink shared channel (PDSCH) to the EPRE of the corresponding RS. The CSI may be determined according to the ratio. UsedRS The RS resource count can be determined based on the condition that the RS resource count is transmitted on the antenna ports of N UsedRS N RS Equal to or N RSWhether or not N is greater than or equal to N can be determined according to the reporting mode parameter in the configuration. UsedRS Each of the RS resources may be associated with the same ratio of the EPRE of the PDSCH to the EPRE of the corresponding RS. When the reporting mode parameter is configured to be the first mode, at least one of the following applies: UsedRS is N RS or CSI can be equal to N RS When the reporting mode parameter is configured to be the second mode, at least one of the following applies: UsedRS is N RS or the wireless communication device may be configured to receive the N RS N of RS resources UsedRS The CSI may indicate N RS resources. UsedRS It can be determined according to the RS resources.

[0170] In some embodiments, the first moiety is N RS N selected from RS resources UsedRS The indicator may comprise an indicator of the RS resources. The indicator may comprise a bitmap. The bit size of the bitmap is N RS The bits of the bitmap, from the most significant bit (MSB) to the least significant bit (LSB), can be determined according to N in ascending or descending order of RS resource identifier (ID) or RS resource order. RSThe bitmap may be mapped to RS resources. A first value of a bit of the bitmap (e.g., bit value 1) may indicate that the corresponding RS resource is selected. A second value of the bit (e.g., bit value 0) may indicate that the corresponding RS resource is not selected. The at least one criterion for selecting RS resources configured in the configuration (e.g., CSI reporting configuration) may include at least one of the following: a maximum number of RS resources in the set should be selected; a minimum number of RS resources in the set should be selected; a first combination of one or more RS resources from the set cannot be selected; or a second combination of one or more RS resources from the set can be selected.

[0171] In some embodiments, when at least one of the following applies: Radio Resource Control (RRC) parameters are RS When the RRC parameters are configured to indicate that RS resources should be used for CSI determination, and when the RRC parameters are configured to indicate that selection of RS resources for CSI determination is disabled, N RS When the RS resources consist of one RS resource for channel measurement, or N RS When =1, N UsedRS The RS resource indicator field may be absent or may have a zero bit size. When at least one of the following applies: the radio resource control (RRC) parameters are N RS When the RRC parameters are configured to indicate that all or a subset of RS resources should be used for CSI determination, when the RRC parameters are configured to indicate that RS resource selection for CSI determination is enabled, RS When the RS resources comprise more than one RS resource for channel measurement, or N RS is greater than 1, N UsedRSThere may be a field for an indicator of the RS resource.

[0172] In some embodiments, the first portion may comprise an indicator of a parameter combination to be selected from a set of parameter combinations. RS The indicator may comprise at least one of the number of spatial domain (SD) bases, frequency domain (FD) base coefficients, or non-zero coefficient factors for each RS resource. [ka] wherein N L may be the number of parameter combinations in the set. The capability report for the wireless communication device may include a maximum number of parameter combinations to be configured in the configuration, N RS The maximum number of selected SD bases across RS resources, or N UsedRS The SD bases may include at least one of the maximum number of selected SD bases across the RS resources.

[0173] In some embodiments, the first part includes an indicator of the number of non-zero coefficients (K NZ ) The indicator may include N RS RS resources or N UsedRS The indicator can be determined across N RS resources. RS RS resources or N UsedRS The bit width of the indicator can be determined according to at least one of a combination of parameters, K0, or a maximum allowable rank. K0 can be determined according to a function of M or β, a function of a maximum value to select, or N RS RS resources or N UsedRS The parameter combination may comprise a selected combination. The parameter combination may be determined across N RS resources. RSThe indicator may include at least one of the number of spatial domain (SD) bases, frequency domain (FD) base coefficients, or non-zero coefficient factors for each RS resource. When the maximum allowed rank is 1, the bit width of the indicator is [ka] When the maximum allowed rank is not 1, the bit width of the indicator can be [ka] It could be.

[0174] In some embodiments, the indicator is N RS RS resources or N UsedRS may be provided for each i-th RS resource, and at least one of the following applies: when the maximum allowed rank is 1, the bit width of the indicator for the i-th RS resource is [ka] or when the maximum allowed rank is not 1, the bit width of the indicator for the i-th RS resource may be [ka] K0 can be [ka] can be determined according to the formula: [ka] where P m may represent the FD basis coefficients under a given rank of m, or P v may represent the FD basis coefficient for the indicated rank in the CSI report, [ka] is the NRS may represent the total number of spatial domain (SD) bases across the RS resources, or [ka] is.

[0175] In some embodiments, K0 is [ka] can be determined according to the formula: [ka] where P i,j,v and P i,j,m may represent the FD basis coefficients of the indicated rank, the i-th RS, and the j-th parameter combination in the CSI report, and the FD basis coefficients of the i-th RS and the j-th combination under the indicated rank or a given rank of m, respectively. In some embodiments, the first part may comprise an indicator of the RS resource corresponding to the strongest coefficient, and the bit width of the indicator may be [ka] It could be.

[0176] In some embodiments, P v The same value of Λ and the same value of beta (β) can be associated with each of the RSs. The maximum number of non-zero coefficients summed for one layer is [ka] The maximum number of non-zero coefficients summed across all layers can be determined according to [ka] where "Set of used RS(s)" can be determined according to N UsedRSmay be determined according to RS resources, and J may correspond to a combination of parameters used for CSI determination; [ka] is the N for the J-th parameter combination used for CSI determination RS may represent the total number of spatial domain (SD) bases across the RS resources, or [ka] and [ka] where P v and P m may represent the frequency domain (FD) basis coefficients for the indicated rank in the CSI report and the FD basis coefficients below a given rank of m, respectively.

[0177] In some embodiments, P v and β are respectively N RS The RS resources may have individual values ​​associated with each of the N RS resources. RS The maximum number of non-zero coefficients summed across RS resources is [ka] or across all layers, or all N RS The maximum number of non-zero coefficients summed across RS resources is: [ka] where "Set of used RS(s)" can be determined according to N UsedRS may be determined according to RS resources, and J may correspond to a combination of parameters used for CSI determination; [ka] where P i,J,v and P i,J,m may represent the FD basis coefficients of the combination of the indicated rank, the i-th RS, and the J-th parameter in the CSI report, and the FD basis coefficients of the i-th RS and the J-th combination under a given rank of m, respectively.

[0178] In some embodiments, the second part may comprise the number of non-zero coefficients provided for the i-th RS resource, summed across all layers. The bit width of the indicator for the i-th RS resource may be determined according to K0. When the maximum allowed rank is 1, the bit width for the i-th RS resource may be [ka] When the maximum allowed rank is not 1, the bit width for the i-th RS resource can be [ka] It can be. N UsedRS or N RS When is 1, the "Number of non-zero coefficients summed across all layers for the i-th RS resource" field may not be present. The i-th RS resource may have N UsedRS It may correspond to any of the RS resources.

[0179] In some embodiments, the second portion may comprise S number of groups, where S may be a positive integer. The first group of the second portion may include at least one indicator of a selected spatial domain (SD) basis. N UsedRS The number of indicators in the SD basis selected for each RS resource (N UsedRS) may be present. The first indicator from the at least one indicator of the selected SD basis may comprise at least one of an indicator of a rotation coefficient for the SD basis and an indicator of an SD basis combination. The first group of the second part may include an indicator of an RS resource corresponding to the strongest coefficient, and the bit width of the indicator may be [ka] The first group of the second part may include an indicator of a spatial domain (SD) basis corresponding to the strongest coefficient. The first part may include an indicator of an RS resource corresponding to the strongest coefficient. The bit width of the indicator of the RS resource may be [ka] The bit width of the SD basis indicator can be [ka] The bit width of the SD basis indicator can be [ka] For rank 1, the bit width of the indicator of the SD basis can be [ka] For ranks other than 1, the bit width of the indicator of the SD basis can be [ka] It could be.

[0180] In some embodiments, the first group of the second part or the second part may include an indicator of the RS resource corresponding to the strongest coefficient, and at least one of the following applies: the bit width of the indicator of the RS resource is: [ka] The bit width of the indicator of the SD basis can be [ka] For rank 1, the bit width of the indicator of the SD basis can be [ka] or for ranks other than 1, the bit width of the indicator of the SD basis can be [ka] The indicator of the spatial domain (SD) basis corresponding to the strongest coefficient can be N UsedRS RS resources, and the bit width of the indicator is [ka] It could be.

[0181] In some embodiments, for rank 1, the bit width of the indicator is: [ka] or for rank other than 1, [ka] It could be.

[0182] In some embodiments, the CSI is N for the RS group with an index of t. UsedRS The first group of the second portion of CSI may comprise an indicator of one or more of the N RS resources, where t may be an integer. UsedRS The RS resource count may comprise an indicator of one or more of the N RS resources. UsedRS The number of one or more of the RS resources is a function of T or N.UsedRS / T, or [ka] T may be the total number of groups and may be a positive integer. UsedRS One or more of the RS resources form an RS group with an index of t=0, and N UsedRS The remainder of the RS resources may form an RS group with an index of t=1. The indicator may correspond to a bitmap, and the bit width may be the number of RS resources used. [ka] may correspond to the number of combinations with a bit width of 100 bits, where the bit width may be the number of RS resources used, and N t may represent the number of RSs for the RS group with index t. The combination number may be a single parameter (e.g., a value of 31) to indicate more than one parameter (e.g., values ​​of 6 and 1). For example, the first value may be equal to floor(X / 5) and the second value may be equal to X%5.

[0183] In some embodiments, the RS group with an index of t=0 may comprise RS resources corresponding to the strongest coefficient. The RS group with an index of t=1 may comprise the remaining portion of the used RSs, excluding the RS resources corresponding to the strongest coefficient. Each RS group may have a separate priority level in terms of CSI omission. The priority values ​​for the non-zero coefficients corresponding to the RS group with an index of t in terms of CSI omission may be determined according to t. The number of RS groups may be 2. The second group of the second part may include indicators of one or more selected frequency domain (FD) bases, where at least one of the following applies: the indicators are N UsedRSFor rank v transmission, if N3<=threshold, the bit width is [ka] For non-rank v transmissions, which may be bits, if N3 > threshold, the bit width is [ka] When the RS resource used for CSI determination is indicated by another indicator of the RS resource corresponding to the strongest coefficient among the coefficients, the bit width of the indicator may be [ka] bits, and the reference FD basis can be assumed to be 0, or when the RS used for CSI determination is indicated by another indicator, the bit width of the indicator is [ka] It could be.

[0184] In some embodiments, the second group of the second portion may include an indicator of a window of a selected frequency domain (FD) basis, and at least one of the following is true: the indicator of a window of a selected FD basis is N UsedRS The second group of the second part may comprise an indicator of the offset of the selected frequency domain (FD) basis, and at least one of the following applies: the at least one indicator is ... UsedRSThe at least one indicator may provide an offset of the reference FD basis between one of the N RS resources and the reference RS resource. UsedRS The at least one indicator may provide an offset of the FD basis between one of the RS resources and the reference RS resource, where the individual offset may be an offset of a window of the selected FD basis between the individual RS resource and the reference RS resource, excluding the reference RS resource. UsedRS The number of indicators can be provided for one of the RS resources, and the number of indicators can be (N UsedRS -1), the reference RS resource may correspond to the strongest coefficient, and may be determined according to the indicator of the spatial domain (SD) basis corresponding to the strongest coefficient or the indicator of the RS resource corresponding to the strongest coefficient, and the bit width of at least one indicator may be: [ka] The second group of the second part may include reference amplitudes for at least one specific layer.

[0185] In some embodiments, the second group of the second portion may include at least one first group of amplitude values ​​for at least one non-zero coefficient. The first group of amplitude values ​​for the non-zero coefficient may be determined according to a priority function.

[0186] In some embodiments, the second group of the second portion may include at least one first group of phase values ​​for at least one non-zero coefficient. The first group of phase values ​​for the non-zero coefficient may be determined according to a priority function. The second group of the second portion may include at least one first group of indicators for the at least one non-zero coefficient. The first group of indicators for the non-zero coefficient may be determined according to a priority function. The first group may be N UsedRS The signal may comprise an indicator of one or more RSs from the RS resources, or at least one amplitude value corresponding to an RS resource indicated by at least one of the RSs corresponding to the strongest coefficient.

[0187] In some embodiments, the third group of the second portion may include at least one second group of amplitude values ​​for at least one non-zero coefficient. The second group of amplitude values ​​for the non-zero coefficient may be determined according to a priority function. The second group of the second portion may include at least one second group of phase values ​​for the at least one non-zero coefficient. The second group of phase values ​​for the non-zero coefficient may be determined according to a priority function.

[0188] In some embodiments, the second group of the second portion may include at least one second group of indicators for at least one non-zero coefficient. The second group of indicators for the non-zero coefficient may be determined according to a priority function. For the S groups of the second portion, in the order of the S groups, for each of the last S-1 or last S-2 groups of the second portion, there may be a corresponding t-th group of amplitude values ​​for the non-zero coefficients, phase values ​​for the non-zero coefficients, or indicators for the non-zero coefficients. When the CSI report cannot be carried entirely within the physical uplink shared channel (PUSCH), the wireless communication device may omit a portion of the second portion.

[0189] In some embodiments, a group in the second portion may have a lower priority for omission (e.g., a higher likelihood for being omitted) relative to another group that is earlier in the order or has a smaller group index within the second portion. A higher priority may mean / indicate a higher priority for transmission / retention in the CSI report (rather than being omitted). The wireless communication device may prioritize bits related to amplitude values ​​for non-zero coefficients, phase values ​​for non-zero coefficients, or indicators for non-zero coefficients to be carried in the PUSCH according to a priority function. A non-zero coefficient with the highest priority may have the lowest associated value of the priority function. The priority function may be a function of a layer index (l), a spatial domain (SD) basis index (i), a frequency domain (FD) basis index (f), or an RS group index (t) of one or more RS resources. For determining the value of the priority function, the RS group index may be more significant than at least one of the layer index, the SD basis index, or the FD basis index.

[0190] In some embodiments, when the number of layers is v, the number of SD bases is L, and the number of FD bases is Mv, the priority function is [ka] When the number of layers is v, the number of SD bases is L, and the number of FD bases is Mv, the priority function may be [ka] It could be.

[0191] In some embodiments, a wireless communication node (e.g., a BS) may notify a wireless communication device (e.g., a UE) of N RSA configuration (e.g., a CSI reporting configuration) associated with a set of N reference signal (RS) resources may be transmitted. RS may be a positive integer value. The wireless communication node receives N RS The wireless communication device may receive at least one RS corresponding to the N RS resources. RS N of RS resources UsedRS Generate a channel state information (CSI) report according to the RS resources, where the CSI report may comprise a first part and a second part. UsedRS can be a positive integer value.

[0192] While various embodiments of the present solution have been described above, it should be understood that they are presented by way of example only, and not by way of limitation. Similarly, various diagrams may depict example architectures or configurations, which are provided to enable those skilled in the art to understand example features and functionality of the present solution. However, such skilled artisans will understand that the present solution is not limited to the illustrated example architectures or configurations, but can be implemented using various alternative architectures and configurations. In addition, as will be understood by those skilled in the art, one or more features of one embodiment can be combined with one or more features of another embodiment described herein. Thus, the scope and scope of the present disclosure should not be limited by any of the example embodiments described above.

[0193] It should also be understood that any reference to elements herein using a designation such as "first," "second," etc., does not generally limit the quantity or order of those elements. Rather, these designations may be used herein as a convenient means of distinguishing between two or more elements or instances of an element. Thus, reference to a first and a second element does not imply that only two elements may be employed or that the first element must precede the second element in some manner.

[0194] Additionally, those skilled in the art will understand that information and signals may be represented using any of a variety of different technologies and techniques. For example, the data, instructions, commands, information, signals, bits, and symbols that may be referenced in the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0195] Those skilled in the art will further understand that any of the various illustrative logic blocks, modules, processors, means, circuits, methods, and functions described in connection with the aspects disclosed herein may be implemented by electronic hardware (e.g., digital implementations, analog implementations, or a combination of the two), firmware, various forms of programs or design code incorporating instructions (which may be referred to herein for convenience as “software” or “software modules”), or any combination of these techniques. To clearly illustrate this interchangeability of hardware, firmware, and software, the various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware, firmware, or software, or a combination of these techniques, depends on the particular application and design constraints imposed on the overall system. Those skilled in the art may implement the described functionality in various ways for each particular application, but such implementation decisions do not cause a departure from the scope of the present disclosure.

[0196] Furthermore, those skilled in the art will understand that the various illustrative logic blocks, modules, devices, components, and circuits described herein may be implemented in or by integrated circuits (ICs), which may include general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, or any combination thereof. The logic blocks, modules, and circuits may further include antennas and / or transceivers to communicate with various components within a network or device. A general-purpose processor may be a microprocessor, but alternatively, the processor may be any conventional processor, controller, or state machine. A processor may also be implemented as a combination of computing devices, e.g., a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other suitable configuration for performing the functions described herein.

[0197] If implemented in software, the functions can be stored as one or more instructions or code on a computer-readable medium. Thus, the steps of a method or algorithm disclosed herein can be implemented as software stored on a computer-readable medium. Computer-readable media includes both computer storage media and communication media, including any medium that can enable a computer program or code to be transferred from one place to another. A storage medium can be any available medium that can be accessed by a computer. By way of example, and not limitation, such computer-readable media can include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store desired program code in the form of instructions or data structures and that can be accessed by a computer.

[0198] As used herein, the term "module" refers to software, firmware, hardware, and any combination of these elements for performing the associated functions described herein. Additionally, for purposes of discussion, various modules are described as discrete modules; however, as will be apparent to one skilled in the art, two or more modules may be combined to form a single module that performs the associated functions according to embodiments of the present solution.

[0199] Additionally, memory or other storage devices and communication components may be employed in embodiments of the solution. It should be understood that, for purposes of clarity, the above description describes embodiments of the solution with reference to different functional units and processors. However, it will be apparent that any suitable distribution of functionality between different functional units, processing logic elements, or domains may be used without departing from the solution. For example, functionality illustrated as being performed by separate processing logic elements or controllers may be performed by the same processing logic element or controller. References to specific functional units therefore do not indicate a strict logical or physical structure or organization, but merely to suitable means for providing the described functionality.

[0200] Various modifications of the embodiments described in this disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the scope of the present disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the novel features and principles disclosed herein, as recited in the following claims.

Claims

1. 1. A method comprising: The wireless communication device receives the N ＲＳ receiving a configuration associated with a set of N reference signal (RS) resources, ＲＳ is a positive integer value, and The wireless communication device receives the N ＲＳ receiving the at least one RS corresponding to the RS resources; The wireless communication device ＲＳ N of RS resources ＵｓｅｄＲＳ generating a channel state information (CSI) report according to N RS resources, the CSI report comprising a first part and a second part; ＵｓｅｄＲＳ is a positive integer value, and A method comprising:

2. The method of claim 1 , comprising the wireless communication device transmitting the CSI report to the wireless communication node.

3. The N ＲＳ 2. The method of claim 1, wherein one RS resource of the RS resources is associated with a ratio of an energy per resource element (EPRE) of a physical downlink shared channel (PDSCH) to an EPRE of a corresponding RS.

4. The CSI is determined based on the ratio of the PDSCH to the N ＵｓｅｄＲＳ being determined based on a condition that the RS resource is transmitted on an antenna port of the RS resource; N ＵｓｅｄＲＳ N ＲＳ or N ＲＳ whether the following is determined according to a reporting mode parameter in said configuration; or The N ＵｓｅｄＲＳ Each of the RS resources is associated with the same ratio of the EPRE of the PDSCH to the EPRE of the corresponding RS. The method of claim 3 , wherein at least one of the following applies:

5. When the reporting mode parameter is configured to be in a first mode, N ＵｓｅｄＲＳ is N ＲＳ be equal to, or CSI is the N ＲＳ To be determined according to all of the resources The method of claim 4 , wherein at least one of the following applies:

6. When the reporting mode parameter is configured to be in a second mode, N ＵｓｅｄＲＳ is N ＲＳ is less than or equal to, or The wireless communication device ＲＳ The N RS resources ＵｓｅｄＲＳ RS resources, and the CSI should indicate the N ＵｓｅｄＲＳ Determined according to RS resources The method of claim 4 , wherein at least one of the following applies:

7. The first portion is the N ＲＳ The N RS resources selected from ＵｓｅｄＲＳ an indicator of RS resources; The indicator comprises a bitmap, the bit size of the bitmap being N ＲＳ be determined in accordance with The bits of the bitmap, from most significant bit (MSB) to least significant bit (LSB), are arranged in ascending or descending order of RS resource identifier (ID) or RS resource order, to form the N ＲＳ being mapped to RS resources; a first value of a bit of the bitmap indicating that a corresponding RS resource is selected; a second value of the bit indicates that the corresponding RS resource is not selected; or At least one criterion for selecting the RS resource configured in the configuration is: the maximum number of RS resources in the set to be selected; the minimum number of RS resources in the set should be selected; one or more first combinations of RS resources from the set cannot be selected; or a second combination of one or more RS resources from the set can be selected; It must include at least one of the following: The method of claim 1 , wherein at least one of the following applies:

8. Radio resource control (RRC) parameters are ＲＳ When configured to indicate that RS resources should be used for CSI determination, When the RRC parameters are configured to indicate that RS resource selection for CSI determination is disabled, The N ＲＳ when the RS resources consist of one RS resource for channel measurement, or N ＲＳ When = 1 When at least one of the above is ＵｓｅｄＲＳ The method of claim 7 , wherein the indicator field of RS resources is not present or has a zero bit size.

9. Radio resource control (RRC) parameters are ＲＳ When configured to indicate that all or a subset of RS resources should be used for CSI determination, When the RRC parameters are configured to indicate that RS resource selection for CSI determination is enabled, The N ＲＳ when the RS resources comprise more than one RS resource for channel measurement; or N ＲＳ is greater than 1 When at least one of the above is ＵｓｅｄＲＳ The method of claim 7 , wherein the indicator field of RS resources is present.

10. the first portion comprising an indicator of a parameter combination to be selected from a set of parameter combinations; The combination of parameters is ＲＳ and at least one of a number of spatial domain (SD) bases, a frequency domain (FD) base coefficients, or a non-zero coefficient factor for each RS resource. The bit width of the indicator is: [Equation 1] wherein N Ｌ is the number of parameter combinations in the set; or The capability report for the wireless communication device comprises: the maximum number of parameter combinations to be configured in said configuration; The N ＲＳ the maximum number of selected SD bases across RS resources, or The N ＵｓｅｄＲＳ the maximum number of selected SD bases across RS resources, It must include at least one of the following: The method of claim 1 , wherein at least one of the following applies:

11. The first part is an indicator of the number of non-zero coefficients (K ＮＺ ) The indicator is the N ＲＳ RS resources or the N ＵｓｅｄＲＳ determined across RS resources; The indicator is the N ＲＳ RS resources or the N ＵｓｅｄＲＳ provided for each RS resource, or The bit width of the indicator is determined by the combination of parameters, K ０ , or the maximum allowable rank, ０ is determined according to a function of M or β, or a function of the maximum value to be selected, or ＲＳ RS resources or the N ＵｓｅｄＲＳ Determined across RS resources The method of claim 1 , wherein at least one of the following applies:

12. the parameter combination comprises a selected combination; The combination of parameters is ＲＳ and at least one of the number of spatial domain (SD) bases, frequency domain (FD) base coefficients, or non-zero coefficient factors for each RS resource. The method of claim 11 , wherein at least one of the following applies:

13. When the maximum allowable rank is 1, the bit width of the indicator is: [Equation 2] or When the maximum allowed rank is not 1, the bit width of the indicator is: [Equation 3] Being The method of claim 11 , wherein at least one of the following applies:

14. The indicator is the N ＲＳ RS resources or the N ＵｓｅｄＲＳ provided for each RS resource, When the maximum allowed rank is 1, the bit width of the indicator for the i-th RS resource is [Equation 4] or When the maximum allowed rank is not 1, the bit width of the indicator for the i-th RS resource is [Equation 5] Being The method of claim 11 , wherein at least one of the following applies:

15. K ０ teeth, [Equation 6] is determined according to the formula: [Equation 7] wherein P ｍ represents the FD basis coefficient under a given rank of m, or P ｖ represents the FD basis coefficient for the indicated rank in the CSI report; [Equation 8] is the N ＲＳ represents the total number of spatial domain (SD) bases across RS resources, or [Equation 9] That is, The method according to any one of claims 11 to 14.

16. K ０ teeth, [Equation 10] is determined according to the formula: [0011] wherein P ｉ，ｊ，ｖ and P ｉ，ｊ，ｍ respectively represent the FD basis coefficients of the combination of the indicated rank, the i-th RS, and the j-th parameter in the CSI report, and the FD basis coefficients of the i-th RS and the j-th combination under the indicated rank or a given rank of m; The method according to any one of claims 11 to 14.

17. The first part comprises an indicator of an RS resource corresponding to a strongest coefficient, the bit width of the indicator being: [0012] The method of claim 1, wherein

18. P ｖ and the same value of beta (β) are each associated with each of the RSs; The maximum number of non-zero coefficients summed for one layer is [0013] or The maximum number of non-zero coefficients summed across all layers is [0014] is determined in accordance with In the formula, "Set of used RS(s)" is the N ＵｓｅｄＲＳ J corresponds to a combination of the parameters used for CSI determination; [Equation 15] is the N for the J-th parameter combination used for CSI determination. ＲＳ represents the total number of spatial domain (SD) bases across RS resources, or [0016] and [Equation 17] wherein P ｖ and P ｍ represent the frequency domain (FD) basis coefficients for the indicated rank in the CSI report and the FD basis coefficients under a given rank of m, respectively; The method of claim 1 , wherein at least one of the following applies:

19. P ｖ and β are each the N ＲＳ having an individual value associated with each of the RS resources; For one layer or for all of the N ＲＳ The maximum number of non-zero coefficients summed across RS resources is [Equation 18] or Across all layers or across all of the N ＲＳ The maximum number of non-zero coefficients summed across RS resources is [Equation 19] is determined in accordance with In the formula, "Set of used RS(s)" is the N ＵｓｅｄＲＳ J corresponds to a combination of the parameters used for CSI determination; [Equation 20] wherein P ｊ，Ｊ，ｖ and P ｊ，Ｊ，ｍ represent the FD basis coefficients of the combination of the indicated rank, the i-th RS, and the J-th parameter in the CSI report, and the FD basis coefficients of the i-th RS and the J-th combination under a given rank of m, respectively. The method of claim 1 , wherein at least one of the following applies:

20. the second part comprising a number of non-zero coefficients summed across all layers provided for the i-th RS resource; The bit width of the indicator for the i-th RS resource is K ０ be determined in accordance with When the maximum allowed rank is 1, the bit width for the i-th RS resource is [0000] That is, When the maximum allowed rank is not 1, the bit width for the i-th RS resource is [Equation 22] That is, N ＵｓｅｄＲＳ or N ＲＳ is 1, the field "Number of non-zero coefficients summed across all layers for the i-th RS resource" is not present; or The i-th RS resource is one of the N RS resources excluding the last or first one. ＵｓｅｄＲＳ Corresponding to any of the RS resources The method of claim 1 , wherein at least one of the following applies:

21. The method of claim 1 , wherein the second portion comprises a group of S numbers, where S is a positive integer.

22. a first group of the second portion including at least one indicator of a selected spatial domain (SD) basis; The N ＵｓｅｄＲＳ The number of indicators of the SD basis selected for each RS resource (N ＵｓｅｄＲＳ ) exists, or the first indicator from the at least one indicator of the selected SD basis comprises at least one of an indicator of a rotation coefficient for the SD basis and an indicator of an SD basis combination.

22. The method of claim 21, wherein at least one of the following applies:

23. a first group of the second portion including indicators of RS resources corresponding to the strongest coefficients; The bit width of the indicator is: [Equation 23] 22. The method of claim 21, wherein:

24. 22. The method of claim 21, wherein a first group of the second portion includes indicators of spatial domain (SD) bases corresponding to the strongest coefficients.

25. the first portion includes an indicator of an RS resource corresponding to a strongest coefficient; The bit width of the indicator of the RS resource is: [0000] That is, The bit width of the indicator of the SD basis is [Equation 25] That is, The bit width of the indicator of the SD basis is, regardless of rank, [Equation 26] That is, For rank 1, the bit width of the indicator of the SD basis is [0000] or For ranks other than 1, the bit width of the indicator of the SD basis is [0000] Being 25. The method of claim 24, wherein at least one of the following applies:

26. the first group of the second part or the second part includes an indicator of an RS resource corresponding to a strongest coefficient; The bit width of the indicator of the RS resource is: [0000] That is, The bit width of the indicator of the SD basis is [Equation 30] Being a bit, For rank 1, the bit width of the indicator of the SD basis is [Equation 31] or For ranks other than 1, the bit width of the indicator of the SD basis is [Equation 32] Being 25. The method of claim 24, wherein at least one of the following applies:

27. The indicator of the spatial domain (SD) basis corresponding to the strongest coefficient is ＵｓｅｄＲＳ RS resources, and the bit width of the indicator is [Equation 33] 25. The method of claim 24, wherein:

28. For rank 1, the bit width of the indicator is: [Equation 34] or Regarding ranks other than 1, [Equation 35] Being 25. The method of claim 24, wherein at least one of the following applies:

29. The CSI is the N for the RS group with index t. ＵｓｅｄＲＳ 2. The method of claim 1, wherein t comprises an indicator of one or more of the RS resources, where t is an integer.

30. The first group of the second portion of the CSI is ＵｓｅｄＲＳ providing an indicator of one or more of the RS resources; The N ＵｓｅｄＲＳ The number of the one or more RS resources is a function of T or N ＵｓｅｄＲＳ / T, or [Equation 36] where T is the total number of groups and is a positive integer; The N ＵｓｅｄＲＳ The one or more of the RS resources form an RS group with an index of t=0, and the N ＵｓｅｄＲＳ the remaining RS resources form an RS group with index t=1; the indicator corresponds to a bitmap, the bit width being a number of RS resources used; The indicator is [Equation 37] corresponds to the number of combinations with a bit width of 100 bits, where the bit width is the number of RS resources used, and N ｔ represents the number of RSs for the RS group with index t.

30. The method of claim 29, wherein at least one of

31. The RS group with index t=0 comprises the RS resource corresponding to the strongest coefficient; or The RS group with index t=1 comprises the remaining part of the RSs to be used, except for the RS resource corresponding to the strongest coefficient. The method of claim 1 , wherein at least one of the following applies:

32. Each RS group has a distinct priority level in terms of CSI omission; the priority values ​​for the non-zero coefficients corresponding to the RS group with an index of t in terms of CSI omission are determined according to t; or The number of RS groups is two.

32. The method of claim 30 or 31, wherein at least one of the following applies:

33. a second group of the second portion including indicators of one or more selected frequency domain (FD) bases; The indicator is the N ＵｓｅｄＲＳ a separate indicator provided for each RS resource; For rank v transmission, N ３ <= threshold, the bit width is [Equation 38] Being a bit, For rank v transmissions other than ３ If the threshold value is [Number 39] Being a bit, When the RS resource used for CSI determination is indicated by another indicator of the RS resource corresponding to the strongest coefficient among the coefficients, the bit width of the indicator is [Equation 40] bits and the reference FD basis is assumed to be 0, or When the RS used for CSI determination is indicated by another indicator, the bit width of the indicator is [Equation 41] Being 22. The method of claim 21, wherein at least one of the following applies:

34. a second group of the second portion including an indicator of a window of a selected frequency domain (FD) basis; The indicator of the selected window of FD basis is ＵｓｅｄＲＳ having a separate indicator provided for each RS resource; or The indicators may be applied to all layers, or may comprise individual indicators provided for each layer, or for specific layers.

22. The method of claim 21, wherein at least one of the following applies:

35. a second group of the second portion including at least one indicator of an offset of a selected frequency domain (FD) basis; The at least one indicator is ＵｓｅｄＲＳ providing an offset of a reference FD basis between one of the RS resources and a reference RS resource; The at least one indicator is ＵｓｅｄＲＳ providing an offset of an FD basis between one of the RS resources and a reference RS resource, the individual offset being an offset of a window of the selected FD basis between the individual RS resource and the reference RS resource; The at least one indicator is a resource identifier for the N RS resources, excluding the reference RS resource. ＵｓｅｄＲＳ the number of the at least one indicator is provided for one of the RS resources, and the number of the at least one indicator is (N ＵｓｅｄＲＳ -1) the reference RS resource corresponds to a strongest coefficient and is determined according to an indicator of a spatial domain (SD) basis corresponding to the strongest coefficient or an indicator of an RS resource corresponding to the strongest coefficient; The bit width of the at least one indicator is: [0.001] bits, where b is a defined integer value or is provided in said configuration; or The candidate values ​​of the at least one indicator of the offset between the reference FD bases range from 0 to N ３ -1 / b range or 0 to N ３ b-1 range 22. The method of claim 21, wherein at least one of the following applies:

36. 22. The method of claim 21, wherein the second group of the second portion includes a reference amplitude for at least one particular layer.

37. a second group of the second portion including at least one first group of amplitude values ​​for at least one non-zero coefficient; a first group of amplitude values ​​for the non-zero coefficients is determined according to a priority function; 22. The method of claim 21.

38. a second group of the second portion including at least one first group of phase values ​​for at least one non-zero coefficient; a first group of phase values ​​for the non-zero coefficients is determined according to a priority function; 22. The method of claim 21.

39. a second group of the second portion including at least one first group of indicators for at least one non-zero coefficient; a first group of indicators for non-zero coefficients is determined according to a priority function; 22. The method of claim 21.

40. The first group is The N ＵｓｅｄＲＳ an indicator of one or more RSs from the RS resource; or RS corresponding to the strongest coefficient, 40. The method of claim 37, 38, or 39, comprising at least one amplitude value corresponding to an RS resource indicated by at least one of:

41. a third group of the second portion including at least one second group of amplitude values ​​for at least one non-zero coefficient; a second group of amplitude values ​​for the non-zero coefficients is determined according to a priority function; 22. The method of claim 21.

42. the second group of the second portion includes at least one second group of phase values ​​for at least one non-zero coefficient; A second group of phase values ​​for the non-zero coefficients is determined according to a priority function:

22. The method of claim 21.

43. a second group of the second portion including at least one second group of indicators for at least one non-zero coefficient; A second group of indicators for non-zero coefficients is determined according to a priority function:

22. The method of claim 21.

44. 22. The method of claim 21, wherein for the S groups in the second portion, in an order of the S groups, for each of the last S−1 or last S−2 groups in the second portion, there is a t group of amplitude values ​​for non-zero coefficients, a t group of phase values ​​for the non-zero coefficients, or a corresponding t group of indicators for the non-zero coefficients.

45. 22. The method of claim 21, wherein the wireless communication device omits a portion of the second portion when the CSI report cannot be carried entirely within a physical uplink shared channel (PUSCH).

46. 46. ​​The method of claim 45, wherein a group in the second portion has a lower priority with respect to skipping relative to another group that is earlier in the order or has a lower group index within the second portion.

47. 46. ​​The method of claim 45, wherein the wireless communication device prioritizes bits related to amplitude values ​​for non-zero coefficients, bits related to phase values ​​for the non-zero coefficients, or bits related to indicators for non-zero coefficients to be carried in the PUSCH according to a priority function.

48. 48. The method of claim 47, wherein the non-zero coefficients with the highest priority have the lowest associated values ​​of the priority function.

49. 48. The method of claim 47, wherein the priority function is a function of a layer index (l), a spatial domain (SD) basis index (i), a frequency domain (FD) basis index (f), or an RS group index (t) of one or more RS resources.

50. 50. The method of claim 49, wherein for determining the value of the priority function, the index of the RS group is more significant than at least one of the index of the layer, the index of the SD basis, or the index of the FD basis.

51. When the number of layers is v, the number of SD bases is L, and the number of FD bases is Mv, the priority function is [Equation 43] 50. The method of claim 49, wherein the value is determined according to one of:

52. When the number of layers is v, the number of SD bases is L, and the number of FD bases is Mv, the priority function is [Equation 44] 50. The method of claim 49, wherein:

53. 1. A method comprising: The wireless communication node is configured to ＲＳ transmitting a configuration associated with a set of N reference signal (RS) resources, ＲＳ is a positive integer value, and The wireless communication node receives the N ＲＳ receiving the at least one RS corresponding to the RS resources; Including, The wireless communication device ＲＳ N of RS resources ＵｓｅｄＲＳ generating a channel state information (CSI) report according to the RS resources, the CSI report comprising a first part and a second part; ＵｓｅｄＲＳ is a positive integer value, method.

54. 54. A non-transitory computer readable medium having stored thereon instructions that, when executed by at least one processor, cause the at least one processor to perform the method of any one of claims 1-53.

55. Apparatus, comprising at least one processor configured to perform the method of any one of claims 1-53.

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