Method and apparatus for supporting multiple CSI in CSI reporting

Abstract

The embodiment of the invention relates to a method and equipment for supporting multiple pieces of channel state information (CSI) in a channel state information (CSI) report. In accordance with some embodiments of the present disclosure, a UE may: receive one or more CSI reporting configurations, where each of the one or more CSI reporting configurations is associated with one or more CSI reference signal (CSI-RS) resources, each of the one or more CSI-RS resources is configured with a respective number of ports; receiving a first indication indicating at least one of the following parameters for the CSI report: a number of one or more ports, a subset mode of one or more ports, a scaling factor of the number of one or more ports, whether a single CSI or multiple CSI is included in the CSI report, or one or more codebook configurations; and generating a first CSI report based on a first CSI report configuration of the one or more CSI report configurations and the first indication.

Description

Technical Field

[0001] Embodiments of the present disclosure relate generally to wireless communication techniques, and more particularly to supporting multiple channel state information (CSI) in CSI reporting. Background Art

[0002] Wireless communication systems are widely deployed to provide various telecommunication services, such as telephony, video, data, messaging, broadcasts, and the like. Wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources, such as time, frequency, and power. Examples of wireless communication systems include fourth-generation (4G) systems, such as Long Term Evolution (LTE), LTE-Advanced (LTE-A), or LTE-A Pro systems, and fifth-generation (5G) systems, which may also be referred to as New Radio (NR) systems.

[0003] A user equipment (UE) may be configured to report channel state information (CSI). For example, the UE may receive a CSI reference signal (CSI-RS) from a base station (BS), wherein the UE may be configured to receive a CSI-RS associated with a CSI-RS port (e.g., antenna port) number. The UE may measure the received CSI-RS and transmit a CSI report to the BS.

[0004] There is a need in the industry for techniques to improve CSI reporting in wireless communication systems. Summary of the Invention

[0005] Some embodiments of the present disclosure provide a user equipment (UE). The UE may include a transceiver and a processor coupled to the transceiver. The processor may be configured to: receive one or more channel state information (CSI) report configurations, wherein each of the one or more CSI report configurations is associated with one or more CSI reference signal (CSI-RS) resources, each of the one or more CSI-RS resources being configured with a corresponding number of ports; receive a first indication indicating at least one of the following parameters for CSI reporting: one or more numbers of ports, one or more port subset modes, one or more port number scaling factors, whether a single CSI or multiple CSIs are included in a CSI report, or one or more codebook configurations; and generate a first CSI report based on a first CSI report configuration of the one or more CSI report configurations and the first indication.

[0006] In some embodiments of the present disclosure, the first CSI report configuration indication corresponds to a codebook configuration corresponding to each of the one or more port numbers, each of the one or more port subset modes, each of the one or more port number scaling factors, each of a set of predefined port numbers, each of a set of predefined port subset modes, or each of a set of predefined port number scaling factors.

[0007] Some embodiments of the present disclosure provide a base station (BS). The BS may include a transceiver and a processor coupled to the transceiver. The processor may be configured to: transmit one or more channel state information (CSI) report configurations to a user equipment (UE), wherein each of the one or more CSI report configurations is associated with one or more CSI reference signal (CSI-RS) resources, each of the one or more CSI-RS resources being configured with a corresponding number of ports; transmit a first indication to the UE indicating at least one of the following parameters for CSI reporting: one or more numbers of ports, one or more port subset modes, one or more port number scaling factors, whether a single CSI or multiple CSIs are included in a CSI report, or one or more codebook configurations; and receive a first CSI report from the UE based on a first CSI report configuration of the one or more CSI report configurations and the first indication.

[0008] In some embodiments of the present disclosure, the first indication is transmitted via radio resource control (RRC) signaling. In some embodiments of the present disclosure, the first indication is included in downlink control information (DCI) or medium access control (MAC) control element (CE).

[0009] In some embodiments of the present disclosure, the first CSI reporting configuration indicates at least one of: a set of port numbers, a set of port subset modes, a set of port number scaling factors, whether a single CSI or multiple CSIs are included in the CSI report, or a set of codebook configurations.

[0010] In some embodiments of the present disclosure, the one or more port quantities are selected from the set of port quantities. In some embodiments of the present disclosure, the one or more port subset modes are selected from the set of port subset modes. In some embodiments of the present disclosure, the one or more port quantity scaling factors are selected from the set of port quantity scaling factors. In some embodiments of the present disclosure, the one or more codebook configurations are selected from the set of codebook configurations.

[0011] In some embodiments of the present disclosure, the first CSI report includes CSI for each of the one or more port quantities. In some embodiments of the present disclosure, the first CSI report includes CSI for each of the one or more port subset modes. In some embodiments of the present disclosure, the first CSI report includes CSI corresponding to each of the one or more port quantity scaling factors. In some embodiments of the present disclosure, the first CSI report includes CSI for each of a set of predefined port quantities. In some embodiments of the present disclosure, the first CSI report includes CSI for each of a set of predefined port subset modes. In some embodiments of the present disclosure, the first CSI report includes CSI corresponding to each of a set of predefined port quantity scaling factors. In some embodiments of the present disclosure, the first CSI report includes CSI corresponding to each of the one or more codebook configurations.

[0012] In some embodiments of the present disclosure, the first CSI report configuration indication corresponds to a codebook configuration corresponding to each of the one or more port numbers, each of the one or more port subset modes, each of the one or more port number scaling factors, each of a set of predefined port numbers, each of a set of predefined port subset modes, or each of a set of predefined port number scaling factors.

[0013] In some embodiments of the present disclosure, the first CSI reporting configuration indicates a first codebook configuration for the corresponding number of ports, and wherein the codebook configuration corresponding to each of the one or more numbers of ports, each of the one or more port subset modes, each of the one or more port number scaling factors, each of a set of predefined port numbers, each of a set of predefined port subset modes, or each of a set of predefined port number scaling factors is based on the first codebook configuration.

[0014] In some embodiments of the present disclosure, the first CSI reporting configuration indicates a first physical uplink control channel (PUCCH) resource for a single CSI and a second PUCCH resource for multiple CSIs.

[0015] In some embodiments of the present disclosure, the first CSI reporting configuration indicates a first physical uplink control channel (PUCCH) resource, and the first CSI report includes multiple CSIs, and wherein receiving the first CSI report includes receiving each of the multiple CSIs at a corresponding time instance of the first PUCCH resource.

[0016] In some embodiments of the present disclosure, the processor is further configured to transmit a second indication to the UE to activate multiple CSI reporting in the CSI report.

[0017] In some embodiments of the present disclosure, the second indication activates at least one CSI reporting configuration configured with multiple CSI reports among the one or more CSI reporting configurations. The first indication configures the first CSI reporting configuration to have multiple CSI reports, and receiving the first CSI report includes receiving the first CSI report including multiple CSIs in response to the transmission of the second indication.

[0018] In some embodiments of the present disclosure, in response to the BS transmitting a port adaptation indication to the UE, or in response to the BS transmitting a third indication to deactivate multiple CSI reports in the CSI report to the UE, or after a time offset from the transmission of the second indication, the first CSI report includes a single CSI.

[0019] In some embodiments of the present disclosure, the second or third indication is downlink control information (DCI) containing a CSI request field or a semi-persistent (SP) CSI report regarding a physical uplink control channel (PUCCH) activation / deactivation medium access control (MAC) control element (CE).

[0020] In some embodiments of the present disclosure, the first indication reuses a reserved bit in a semi-persistent (SP) CSI report on a physical uplink control channel (PUCCH) activation / deactivation medium access control (MAC) control element (CE).

[0021] Some embodiments of the present disclosure provide a method performed by a UE. The method may include: receiving one or more channel state information (CSI) report configurations, wherein each of the one or more CSI report configurations is associated with one or more CSI reference signal (CSI-RS) resources, each of the one or more CSI-RS resources being configured with a corresponding number of ports; receiving a first indication indicating at least one of the following parameters for CSI reporting: one or more numbers of ports, one or more port subset modes, one or more port number scaling factors, whether a single CSI or multiple CSIs are included in a CSI report, or one or more codebook configurations; and generating a first CSI report based on a first CSI report configuration of the one or more CSI report configurations and the first indication.

[0022] Some embodiments of the present disclosure provide a method performed by a base station (BS). The method may include: transmitting one or more channel state information (CSI) reporting configurations to a UE, wherein each of the one or more CSI reporting configurations is associated with one or more CSI reference signal (CSI-RS) resources, each of the one or more CSI-RS resources being configured with a corresponding number of ports; transmitting a first indication to the UE indicating at least one of the following parameters for CSI reporting: one or more numbers of ports, one or more port subset modes, one or more port number scaling factors, whether a single CSI or multiple CSIs are included in a CSI report, or one or more codebook configurations; and receiving a first CSI report from the UE based on a first CSI reporting configuration of the one or more CSI reporting configurations and the first indication.

[0023] Some embodiments of the present disclosure provide a device. According to some embodiments of the present disclosure, the device may include: at least one non-transitory computer-readable medium having computer-executable instructions stored thereon; at least one receiving circuit system; at least one transmitting circuit system; and at least one processor coupled to the at least one non-transitory computer-readable medium, the at least one receiving circuit system, and the at least one transmitting circuit system, wherein the at least one non-transitory computer-readable medium and the computer-executable instructions may be configured to cause the device to perform a method according to some embodiments of the present disclosure using the at least one processor. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to describe the manner in which the advantages and features of the present disclosure can be obtained, the description of the present disclosure is presented by reference to specific embodiments of the disclosure illustrated in the accompanying drawings. These drawings depict only exemplary embodiments of the present disclosure and are therefore not to be considered limiting of its scope.

[0025] Figure 1 A schematic diagram illustrating a wireless communication system according to some embodiments of the present disclosure;

[0026] Figure 2 A schematic diagram illustrating CSI reporting according to some embodiments of the present disclosure;

[0027] Figures 3a to 3d Describing exemplary port subset modes according to some embodiments of the present disclosure;

[0028] Figures 4a to 7 A schematic diagram illustrating CSI reporting according to some embodiments of the present disclosure;

[0029] Figure 8illustrates exemplary semi-persistent (SP) CSI reporting with respect to physical uplink control channel (PUCCH) activation / deactivation of a medium access control (MAC) control element (CE) according to some embodiments of the present disclosure;

[0030] Figure 9 and 10 a flowchart illustrating an exemplary procedure for wireless communication according to some embodiments of the present disclosure; and

[0031] Figure 11 A block diagram illustrating an exemplary apparatus according to some embodiments of the present disclosure. DETAILED DESCRIPTION

[0032] The detailed description of the accompanying drawings is intended as a description of the preferred embodiments of the present disclosure and is not intended to represent the only form in which the present disclosure can be practiced. It should be understood that the same or equivalent functions can be achieved by different embodiments, and the different embodiments are intended to be included in the spirit and scope of the present disclosure.

[0033] Reference will now be made in detail to certain embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings. To facilitate understanding, the embodiments are provided in the context of specific network architectures and new service scenarios, such as 3rd Generation Partnership Project (3GPP) 5G (NR), 3GPP Long Term Evolution (LTE) Release 8, etc. It is contemplated that as network architectures and new service scenarios evolve, all embodiments of the present disclosure will also be applicable to similar technical issues. Furthermore, the terminology used in the present disclosure may vary without affecting the principles of the present disclosure.

[0034] Figure 1 A schematic diagram illustrating a wireless communication system 100 according to some embodiments of the present disclosure.

[0035] like Figure 1 As shown in FIG, a wireless communication system 100 may include a number of UEs 101 (eg, UE 101a and UE 101b) and a base station (eg, BS 102). Figure 1 A specific number of UEs 101 and BSs 102 are depicted in FIG. 1 , but it is contemplated that any number of UEs and BSs may be included in the wireless communication system 100 .

[0036] UE 101 may include a computing device such as a desktop computer, a laptop computer, a personal digital assistant (PDA), a tablet computer, a smart TV (e.g., a TV connected to the Internet), a set-top box, a game console, a security system (including a security camera), an in-vehicle computer, a network device (e.g., a router, a switch, and a modem), or the like. According to some embodiments of the present disclosure, UE 101 may include a portable wireless communication device, a smartphone, a cellular phone, a flip phone, a device with a subscriber identity module, a personal computer, a selective call receiver, or any other device capable of sending and receiving communication signals over a wireless network. In some embodiments of the present disclosure, UE 101 includes a wearable device such as a smartwatch, a fitness band, an optical head-mounted display, or the like. UE 101 may also be referred to as a subscriber unit, a mobile device, a mobile station, a user, a terminal, a mobile terminal, a wireless terminal, a fixed terminal, a subscriber station, a user terminal, or a device, or other terms used in the art. UE 101 may communicate with BS 102 via uplink (UL) communication signals.

[0037] BSs 102 may be distributed throughout a geographic area. In certain embodiments of the present disclosure, BSs 102 may also be referred to as access points, access terminals, base stations, base units, macrocells, Node Bs, evolved Node Bs (eNBs), gNBs, home Node Bs, relay nodes, or devices, or described using other terms used in the art. BSs 102 are typically part of a radio access network, which may include one or more controllers communicatively coupled to one or more corresponding BSs 102. BSs 102 may communicate with UEs 101 via downlink (DL) communication signals.

[0038] The wireless communication system 100 may be compatible with any type of network capable of sending and receiving wireless communication signals. For example, the wireless communication system 100 is compatible with wireless communication networks, cellular telephone networks, time division multiple access (TDMA)-based networks, code division multiple access (CDMA)-based networks, orthogonal frequency division multiple access (OFDMA)-based networks, LTE networks, 3GPP-based networks, 3GPP 5G networks, satellite communication networks, high altitude platform networks, and / or other communication networks.

[0039] In some embodiments of the present disclosure, the wireless communication system 100 is compatible with the 5G NR of the 3GPP protocol. For example, the BS 102 may transmit data using an Orthogonal Frequency Division Multiplexing (OFDM) modulation scheme on the DL, and the UE 101 may transmit data using a Discrete Fourier Transform-Spread-Orthogonal Frequency Division Multiplexing (DFT-S-OFDM) or Cyclic Prefix-OFDM (CP-OFDM) scheme on the UL. However, more generally, the wireless communication system 100 may implement some other open or proprietary communication protocols, such as WiMAX and other protocols.

[0040] In some embodiments of the present disclosure, BS 102 and UE 101 may communicate using other communication protocols, such as the IEEE 802.11 series of wireless communication protocols. Furthermore, in some embodiments of the present disclosure, BS 102 and UE 101 may communicate over a licensed spectrum, while in some other embodiments, BS 102 and UE 101 may communicate over an unlicensed spectrum. The present disclosure is not intended to be limited to implementations of any particular wireless communication system architecture or protocol.

[0041] In some embodiments of the present disclosure, the BS may configure the configuration associated with the CSI report for the UE (e.g., via CSI-ReportConfig as specified in the 3GPP specification). The configuration associated with the CSI report (also referred to as "CSI reporting configuration") may indicate resources for channel measurement (e.g., CSI resources, which may be indicated by CSI-ResourceConfig as specified in the 3GPP specification). For example, the CSI-ResourceConfig may define a group of one or more NZP-CSI-RS-ResourceSet, CSI-IM-ResourceSet, and / or CSI-SSB-ResourceSet as specified in the 3GPP specification. The CSI resource configuration may indicate the ports (e.g., the number of ports) of the CSI-RS resource. In some instances, the number of ports of the CSI-RS resource (e.g., denoted as "P CSI-RS ”) can be configured as 1, 2, 4, 8, 12, 16, 24 or 32.

[0042] Since the UE performs CSI measurement on the CSI-RS resources configured for the UE (which are associated with the configured number of ports as described above), the CSI report generated based on the measurement or the CSI included in the CSI report is associated with the configured number of ports.

[0043] In some embodiments of the present disclosure, a CSI reporting configuration may include a codebook configuration (e.g., via CodebookConfig as specified in the 3GPP specification) for configuring Type I and Type II codebooks for CSI reporting. Detailed definitions of Type I and Type II codebooks can be found in the 3GPP specification and are incorporated herein. The codebook configuration may be related to, for example, the number of ports of the associated CSI-RS resource configured in the CSI reporting configuration.

[0044] For example, the codebook configuration may indicate the number of antenna ports in the first (e.g., horizontal) dimension (denoted as N1) and the number of antenna ports in the second (e.g., vertical) dimension (denoted as N2) as well as the codebook subset restriction. CSI-RS ), N1 and N2 can satisfy P CSI-RS =2N1N2. For example, the codebook configuration may indicate the number of panels (denoted as N g ), the number of antenna ports in the first (e.g., horizontal) dimension in the panel (e.g., N1), the number of antenna ports in the second (e.g., vertical) dimension in the panel (e.g., N2), and the codebook subset restriction. The number of CSI-RS ports (i.e., P CSI-RS ), Ng, N1 and N2 can satisfy P CSI-RS =2N g N1N2.

[0045] In some embodiments of the present disclosure, a CSI reporting configuration may be used to configure periodic or semi-persistent reporting transmitted on a physical uplink control channel (PUCCH) (e.g., on a cell in which the CSI reporting configuration is included), or to configure semi-persistent or aperiodic reporting transmitted on a physical uplink shared channel (PUSCH) triggered by a DCI received on, for example, a cell in which the CSI reporting configuration is included (e.g., a cell on which the CSI report is transmitted as determined by the received DCI). Thus, the type of CSI reporting configuration may include, for example, "periodic", "semiPersistentOnPUCCH", "semiPersistentOnPUSCH", and "aperiodic". The "periodic" and "semiPersistentOnPUCCH" CSI reporting configurations may indicate the PUCCH resources (e.g., pucch-CSI-ResourceList as specified in the 3GPP specification) used to report the associated CSI on the PUCCH. In some instances, one PUCCH resource may be associated with one corresponding bandwidth part (BWP).

[0046] In some embodiments of the present disclosure, the DCI that triggers semi-persistent or aperiodic reporting on the PUSCH may include a CSI request field. The size (e.g., the number of bits) of the CSI request field in the DCI is determined by a higher layer (e.g., radio resource control (RRC)) parameter (e.g., reportTriggerSize or reportTriggerSizeDCI-0-2 as specified in the 3GPP specification). For example, the reportTriggerSize field applies to DCI format 0_1, and the reportTriggerSizeDCI-0-2 field applies to DCI format 0_2.

[0047] The UE may be configured with one or more trigger state lists by higher layers. For example, the UE may be configured with an aperiodic trigger state list (e.g., via a higher layer parameter CSI-AperiodicTriggerStateList as specified in the 3GPP specification). For example, the UE may be configured with a trigger state list for semi-persistent reporting of CSI (e.g., via a higher layer parameter CSI-SemiPersistentOnPUSCH-TriggerStateList as specified in the 3GPP specification). Each trigger state in the aperiodic trigger state list may include an associated CSI report configuration list. Each trigger state in the trigger state list for semi-persistent reporting of CSI may include (e.g., one) associated CSI report configuration.

[0048] For semi-persistent reporting on the PUSCH, the CSI request field in the DCI (e.g., the cyclic redundancy check (CRC) bits of the DCI scrambled with a semi-persistent (SP) CSI radio network temporary identifier (RNTI) (SP-CSI-RNTI)) may activate one of the trigger states in a list of trigger states for semi-persistent reporting of CSI. In some examples, the code points of the CSI request field in the DCI are mapped to corresponding SP-CSI trigger states based on, for example, the order of the configured trigger states in the list. For example, code point "0" may be mapped to the trigger state in the first position, and so on. Whether the trigger state indicated by the CSI request is activated or deactivated depends on other fields in the DCI and will be described later.

[0049] For aperiodic reporting, the CSI request field in the DCI is used to initiate a trigger state. In some instances, when the CSI request field in the DCI is set to a predefined value (e.g., all bits of the CSI request field are set to zero), no CSI is requested (e.g., no new aperiodic CSI report is requested). In some instances, when the number of configured CSI trigger states in the aperiodic trigger state list is greater than (where N TSThe UE receives a secondary selection indication (e.g., an aperiodic CSI triggering state secondary selection MAC CE as specified in the 3GPP specification) when the UE receives a secondary selection indication (e.g., an aperiodic CSI triggering state secondary selection MAC CE as specified in the 3GPP specification). The secondary selection indication is used to select up to The trigger states are mapped to code points in the CSI request field in the DCI. In some instances, N TS Configured by higher layer parameters (e.g., reportTriggerSize as specified in 3GPP specifications), and N TS ∈{0,1,2,3,4,5,6}. In some instances, when the number of CSI triggering states in the non-periodic triggering state list is less than or equal to When the CSI request field in the DCI directly indicates the trigger status, the non-zero code point of the CSI request field in the DCI is based on up to The trigger states are mapped to the CSI trigger states in the order of their associated positions in the aperiodic trigger state list. For example, code point '1' may be mapped to the trigger state in the first position, and so on.

[0050] For example, for aperiodic reporting, the CSI request field may include 6 bits and, therefore, 63 code points to map to 63 trigger states. However, the UE may be configured with an aperiodic trigger state list that includes, for example, 128 trigger states. The UE may receive a secondary selection indication to select 63 or fewer trigger states from the 128 trigger states. The CSI request field in the DCI may then select one of the selected 63 or fewer trigger states.

[0051] As described above, the CSI request field in the DCI may select (e.g., one) trigger state from a list of configured trigger states. In the case of semi-persistent reporting, the selected trigger state may be associated with (e.g., one) CSI reporting configuration. Another field in the DCI may be used to further indicate whether CSI reporting for the associated CSI reporting configuration is activated or deactivated.

[0052] In some embodiments, for semi-persistent CSI activation, the UE may first verify the SP-CSI DCI in the physical downlink control channel (PDCCH) by confirming that the CRC bits of the DCI are scrambled by the SP-CSI-RNTI. As an example, the UE may further confirm that all of the following conditions are met:

[0053] ●The "HARQ process number" bits in the DCI are set to all "0".

[0054] The "Redundancy Version" bits in the DCI are set to all "0".

[0055] In some embodiments, for semi-persistent CSI deactivation verification, the UE may first verify the DCI by confirming that the CRC bits of the SP-CSI DCI in the PDCCH are scrambled by the SP-CSI-RNTI. As an example, the UE may further confirm that all of the following conditions are met:

[0056] ●The "HARQ process number" bits in the DCI are set to all "0".

[0057] ●The “Modulation and Coding Scheme” bits in the DCI are set to all “1s”.

[0058] The "resource block assignment" bits in the DCI are:

[0059] ● If higher layers configure only random access (RA) type 0, then it is set to all "0";

[0060] If the higher layer only configures RA type 1, it is set to all "1";

[0061] If higher layers configure dynamic switching between RA types 0 and 1, then if the most significant bit (MSB) is "0", it is set to all "0"s; otherwise, it is set to all "1"s;

[0062] For DCI 0_1, if the higher layer configures RA type 2, then if μ=0, it is set to all "1"s; if μ=1, it is set to all "0", where μ corresponds to the subcarrier spacing (SCS) of the carrier.

[0063] The "Redundancy Version" bits in the DCI are set to all "0".

[0064] Since the UE reports the corresponding CSI only once in response to receiving the DCI containing the CSI request field, there is no need to deactivate the aperiodic reporting.

[0065] In some embodiments of the present disclosure, dynamic adaptation of spatial elements is introduced into a communication system. For example, dynamic adaptation of the number of ports (e.g., via port adaptation instructions) can significantly reduce energy consumed by the network (e.g., the base station). Silencing different port modes can result in different performance. In the context of this disclosure, a port can refer to an antenna port or a logical antenna port.

[0066] As described above, the CSI report can be associated with a port number (e.g., P CSI-RS ) is associated with the CSI-RS resource of the UE. A UE configured with this report can report a single CSI based on the number of ports in one CSI report. Therefore, the dynamic port adaptation mechanism may have an impact on the CSI reporting mechanism.

[0067] For example, the network may not have accurate CSI tracking to schedule data. Figure 2 Schematic diagram illustrating CSI reporting according to some embodiments of the present disclosure. Figure 2 In the example, it is assumed that the UE is configured with a CSI-RS resource having 8 ports. Figure 2 , the UE may receive CSI-RS1 on the configured CSI-RS resource and may report CSI report 1 based on CSI-RS 1 at time T0. At time T1, the UE may receive a port adaptation indication indicating that the number of ports is changed to 32 ports. The UE may receive CSI-RS2 on the configured CSI-RS resource and may report CSI report 2 based on CSI-RS2 at time T2. At time T3, the UE may receive a port adaptation indication indicating that the number of ports is changed to 8 ports. For PDSCHs scheduled after time T3, as shown in FIG. Figure 2 As shown in , CSI report 1 may be outdated, but the associated port number is the same as the current port number (ie, both are 8); and CSI report 2 may be inaccurate because the associated port number (ie, 32) is different from the current port number (ie, 8).

[0068] In order to implement auxiliary information for port adaptation and accurate CSI tracking for data transmission, embodiments of the present disclosure provide a solution for supporting multiple CSIs in CSI reports based on different port modes or port numbers. To implement multiple CSIs in CSI reports, various issues need to be addressed.

[0069] For example, enhancements to the CSI reporting configuration are desired to support multiple CSIs in a CSI report. For example, consideration should be given to how to configure multiple CSIs for reporting. For example, as described above, the codebook configuration is associated with the number of ports used for the associated CSI-RS resources. Because multiple CSIs can be associated with different numbers of ports, enhancements to the codebook configuration are also desired. For example, multiple CSIs may have more overhead than a single CSI, and the configured PUCCH resources may be insufficient. Embodiments of the present disclosure provide solutions to the aforementioned issues.

[0070] Furthermore, including multiple CSIs in a CSI report may not always be desirable, as it may result in higher uplink control information (UCI) content and resource allocation. Embodiments of the present disclosure provide a solution for activating and deactivating such a CSI reporting mechanism.

[0071] More details about the embodiments of the present disclosure will be described in the following text in conjunction with the accompanying drawings.

[0072] Figure 9Flowchart illustrating an exemplary procedure 900 for wireless communication according to some embodiments of the present disclosure. The procedure 900 may be performed by a UE (e.g., Figure 1 The details described in all the above embodiments of the present disclosure are applicable to Figure 9 The embodiment shown in .

[0073] refer to Figure 9 In operation 911, the UE may receive one or more CSI report configurations, wherein each of the one or more CSI report configurations is associated with one or more CSI-RS resources, each of the one or more CSI-RS resources being configured with a corresponding number of ports. Figure 1 BS102 shown in FIG. 1 receives the CSI reporting configuration.

[0074] In operation 913, the UE may receive an indication (represented as a "first indication" for clarity) indicating at least one of the following parameters for CSI reporting: one or more numbers of ports, one or more port subset modes, one or more port number scaling factors, whether a single CSI or multiple CSIs are included in the CSI report, or one or more codebook configurations.

[0075] In the context of this disclosure, a port subset mode may also be referred to as a port mode. In some embodiments, various port modes may be predefined for each port quantity layout. A port quantity layout refers to a supported configuration for the number of ports (N1, N2).

[0076] In operation 915 , the UE may generate a CSI report (denoted as “first CSI report” for clarity) based on a CSI reporting configuration (denoted as “first CSI reporting configuration” for clarity) of the one or more CSI reporting configurations and the first indication.

[0077] In some embodiments of the present disclosure, the first indication may indicate one or more port numbers. In some embodiments of the present disclosure, the first CSI report may include CSI for each of the one or more port numbers.

[0078] For example, the first indication may be represented as follows: It should be noted that the following example is for illustration purposes only and other port numbers may be indicated.

[0079] Reportedportnumber ENUMERATED{24,16,12}

[0080] For example, the CSI-RS resources in the first CSI report configuration may be configured with a port number of 32, and the first indication may indicate {24, 12}. In some instances, the first CSI report may include three CSIs associated with 32 ports, 24 ports, and 12 ports, respectively, or two CSIs associated with 24 ports and 12 ports, respectively. In some instances, when multi-CSI is not activated or deactivated, the first CSI report may include CSI associated with 32 ports. When multi-CSI is activated, the first CSI report may include CSI associated with 32 ports, CSI associated with 24 ports, and CSI associated with 12 ports, or CSI associated with 24 ports and CSI associated with 12 ports.

[0081] In some embodiments of the present disclosure, the first indication may indicate one or more port subset modes. In some embodiments of the present disclosure, the first CSI report may include CSI for each of the one or more port subset modes. A predefined port mode may be arranged for each number of ports.

[0082] For example, the first indication may be expressed as follows: It should be noted that the following examples are for illustration purposes only and other modes may be indicated.

[0083] ReportedPortPattern ENUMERATED {Pattern 1,Pattern 2}

[0084] Figures 3a to 3d Exemplary port subset patterns 300a to 300d are shown for a 24-port layout according to some embodiments of the present disclosure. Figures 3a to 3c In the patterns 300a through 300c shown in FIG, 12 of the 24 ports are silent. Figure 3d In the example, none of the 24 ports are silent.

[0085] For example, the CSI-RS resources in the first CSI reporting configuration may be configured with a port number of 24, and the first indication may indicate mode 1 and mode 2. Figure 3a and 3b Modes 300a and 300b in FIG correspond to Mode 1 and Mode 2, respectively. In some examples, the first CSI report may include three CSIs for modes 300a, 300b, and 300d, respectively, or two CSIs for modes 300a and 300b, respectively. In some examples, when multi-CSI is not activated or deactivated, the first CSI report may include CSI for mode 300d. In some examples, when multi-CSI is activated, the first CSI report may include three CSIs for modes 300a, 300b, and 300d, respectively, or two CSIs for modes 300a and 300b, respectively.

[0086] In some embodiments of the present disclosure, the first indication may indicate one or more port number scaling factors. In some embodiments of the present disclosure, the first CSI report may include CSI corresponding to each of the one or more port number scaling factors.

[0087] For example, the first indication may be expressed as follows: It should be noted that the following examples are for illustration purposes only and other scaling factors may be indicated.

[0088] ReportedPortnumberratio ENUMERATED{3 / 4,1 / 2,1 / 4}

[0089] For example, the CSI-RS resources in the first CSI reporting configuration may be configured with a number of ports of 32, and the first indication may indicate {1 / 2, 1 / 4} (which indicates that 32 / 2 = 16 ports and 32 / 4 = 8 ports). In some examples, the first CSI report may include three CSIs associated with 32 ports, 16 ports, and 8 ports, respectively, or two CSIs associated with 16 ports and 8 ports, respectively. In some examples, when multi-CSI is not activated or deactivated, the first CSI report may include CSI associated with 32 ports. When multi-CSI is activated, the first CSI report may include three CSIs associated with 32 ports, 16 ports, and 8 ports, respectively, or two CSIs associated with 16 ports and 8 ports, respectively.

[0090] In some embodiments of the present disclosure, the first indication may indicate whether a single CSI or multiple CSIs are included in the CSI report. In some embodiments of the present disclosure, the first CSI report may include CSI for each of a set of predefined port numbers, CSI for each of a set of predefined port subset patterns, CSI corresponding to each of a set of predefined port number scaling factors, or any combination thereof.

[0091] For example, the first indication may be expressed as follows: It should be noted that the following examples are for illustrative purposes only.

[0092] IsMultiCSIBOOLEAN

[0093] In some embodiments, a set of port quantities may be predefined, preconfigured, or configured such that when a plurality of CSIs are included in a CSI report, a plurality of CSIs may be generated based on the predefined set of port quantities. In some embodiments, a set of port subset patterns may be predefined, preconfigured, or configured such that when a plurality of CSIs are included in a CSI report, a plurality of CSIs may be generated based on the predefined set of port subset patterns. In some embodiments, a set of port quantity scaling factors may be predefined, preconfigured, or configured such that when a plurality of CSIs are included in a CSI report, a plurality of CSIs may be generated based on the predefined set of port quantity scaling factors. In some embodiments, any combination of a set of port quantities, a set of port subset patterns, or a set of port quantity scaling factors may be predefined, preconfigured, or configured such that when a plurality of CSIs are included in a CSI report, a plurality of CSIs may be generated based on the combination.

[0094] For example, a set of port numbers may be predefined as {24, 12}, and the CSI-RS resources in the first CSI reporting configuration may be configured with a port number of 32. In some examples, the first indication indicates that a single CSI is included in the CSI report (e.g., IsMultiCSI=false), and the first CSI report may include CSI associated with 32 ports. In some examples, the first indication indicates that multiple CSIs are included in the CSI report (e.g., IsMultiCSI=true), and the first CSI report may include three CSIs associated with 32 ports, 24 ports, and 12 ports, respectively, or two CSIs associated with 24 ports and 12 ports, respectively. In some instances, the first indication indicates that multiple CSIs are included in the CSI report; and when multi-CSI is not activated or deactivated, the first CSI report may include CSI associated with 32 ports, and when multi-CSI is activated, the first CSI report may include three CSIs associated with 32 ports, 24 ports, and 12 ports, respectively, or include two CSIs associated with 24 ports and 12 ports, respectively.

[0095] In some embodiments of the present disclosure, the first indication may indicate one or more codebook configurations. In some embodiments of the present disclosure, the first CSI report may include CSI corresponding to each of the one or more codebook configurations.

[0096] For example, each codebook configuration in the one or more codebook configurations may indicate {N1, N2} or {Ng, N1 and N2}, thereby indicating the number of ports or port pattern to be reported. CSI-RS According to P CSI-RS =2N1N2 or P CSI-RS =2N gThe port mode can be determined based on the value of {N1, N2} or the value of {Ng N1 and N2}.

[0097] In some embodiments of the present disclosure, the first indication may be received via RRC signaling. For example, the first indication may be included in a CSI reporting configuration. For example, at least one of the one or more CSI reporting configurations may include the first indication. For example, the first CSI reporting configuration may include the first indication.

[0098] In some embodiments of the present disclosure, the first indication may be included in a DCI or a MAC CE.

[0099] For example, as will be described below, DCI may be used to activate CSI reporting configuration or multiple CSI reporting. For example, the DCI may indicate the number of ports or port mode to be reported (e.g., including a first indication). For example, as will be described below, the first indication may reuse a reserved bit in a MAC CE to indicate, for example, the number of ports or port mode to be reported.

[0100] In some embodiments, in response to receiving a first indication in a DCI or MAC CE, multiple CSI reporting may be activated, and the first indication (e.g., the indicated number of ports or port mode) may be applied to all CSI reporting configurations, or all active CSI reporting configurations, or CSI reporting configurations activated by the DCI or MAC CE.

[0101] In some embodiments of the present disclosure, at least one of one or more CSI reporting configurations (e.g., a first CSI reporting configuration) may indicate at least one of: a set of port numbers, a set of port subset modes, a set of port number scaling factors, whether a single CSI or multiple CSIs are included in the CSI report, or a set of codebook configurations.

[0102] The first indication may select one or more port quantities from the set of port quantities, select one or more port subset modes from the set of port subset modes, select one or more port quantity scaling factors from the set of port quantity scaling factors, or select one or more codebook configurations from the set of codebook configurations. That is, one or more port quantities may be selected from the set of port quantities. One or more port subset modes may be selected from the set of port subset modes. One or more port quantity scaling factors may be selected from the set of port quantity scaling factors. One or more codebook configurations may be selected from the set of codebook configurations. In some examples, a DCI or MAC CE may include the first indication. That is, the DCI or MAC CE may indicate a specific port quantity (note that the port quantity scaling factor is also related to the port quantity) or port subset mode from the configured port quantity or port subset mode for CSI reporting.

[0103] In some embodiments of the present disclosure, one or more CSI reporting configurations may not indicate the number of ports, the port subset mode, the port number scaling factor, whether a CSI report includes a single CSI or multiple CSIs, or the codebook configuration. For example, the DCI or MAC CE may include a first indication directly indicating the number of ports or the port subset mode used for CSI reporting. That is, there is no selection procedure as described above.

[0104] In some embodiments of the present disclosure, at least one of the one or more CSI reporting configurations may include a first indication directly indicating the number of ports or port subset mode used for CSI reporting. That is, for at least one CSI reporting configuration, there is no selection procedure as described above.

[0105] In some embodiments of the present disclosure, at least one of the one or more CSI reporting configurations (e.g., the first CSI reporting configuration) may indicate a codebook configuration corresponding to each of one or more port numbers, each of one or more port subset modes, each of one or more port number scaling factors, each of the set of predefined port numbers, each of the set of predefined port subset modes, or each of the set of predefined port number scaling factors.

[0106] For example, assuming that the CSI-RS resources in the first CSI reporting configuration are configured with a number of ports of 32, the first CSI reporting configuration may indicate a codebook configuration corresponding to 32 ports. Further assuming that the first indication indicates {24, 12}. In some embodiments, the first CSI reporting configuration may further indicate two codebook configurations corresponding to 24 ports and 12 ports, respectively. In some embodiments, the first CSI reporting configuration may indicate a codebook configuration for each configurable number of ports (e.g., 1, 2, 4, 8, 12, 16, 24, or 32 ports).

[0107] For example, assuming that the CSI-RS resources in the first CSI reporting configuration are configured with 32 ports, and the set of predefined port numbers is {16, 12}, in addition to indicating the codebook configuration corresponding to 32 ports, the first CSI reporting configuration may further indicate two codebook configurations corresponding to 16 ports and 12 ports, respectively.

[0108] In some embodiments of the present disclosure, at least one of the one or more CSI reporting configurations (e.g., a first CSI reporting configuration) may indicate a codebook configuration for a corresponding number of ports (e.g., the number of ports of associated CSI-RS resources) (hereinafter, for clarity, referred to as a "first codebook configuration").

[0109] In some embodiments, a codebook configuration corresponding to each of one or more numbers of ports, each of one or more port subset modes, each of one or more port number scaling factors, each of a set of predefined numbers of ports, each of a set of predefined port subset modes, or each of a set of predefined port number scaling factors can be determined based on the first codebook configuration.

[0110] In some embodiments, a codebook configuration corresponding to at least one of one or more port numbers, at least one of one or more port subset modes, at least one of one or more port number scaling factors, at least one of a set of predefined port numbers, at least one of a set of predefined port subset modes, or at least one of a set of predefined port number scaling factors can be determined based on the first codebook configuration, which is not configured in the corresponding CSI reporting configuration (e.g., the first CSI reporting configuration) in one or more CSI reporting configurations.

[0111] For example, assuming that the CSI-RS resources in the CSI reporting configuration (eg, the first CSI reporting configuration) are configured with P CSI-RS ports, and the first CSI report configuration indicates that it is used for P CSI-RS According to the first codebook configuration, the values of N1 and N2 can be determined, where P CSI-RS =2N1N2. In some examples, the values of N1 and N2 come from a table of supported configurations of the number of antenna ports (eg, as shown in Table 1 below). Table 1 is for illustration purposes only and may be predefined in a standard such as a 3GPP specification, for example.

[0112] Table 1: Supported configurations for (N1, N2)

[0113]

[0114]

[0115] For clarity and illustration purposes, assume that the first indication indicates port mode #1. Those skilled in the art will appreciate that the following method can similarly apply when the first indication indicates the number of ports or other information. The codebook configuration for port mode #1 can be determined based on the first codebook configuration. Various methods can be employed for this determination.

[0116] In some embodiments, a principle for determination is that the values of N1' and N2' associated with the codebook configuration for port mode #1 are from a table of supported configurations of the number of antenna ports (e.g., Table 1 shown above), and should satisfy N1' <= N1 and N2' <= N2. In addition, assuming that the number of ports of port mode #1 (denoted as P CSI-RS '), PCSI-RS '=2N1'N2'.

[0117] In some examples, the values of N1' and N2' may be determined based on a mapping relationship between the values of N1' and N2' and the values of N1 and N2. Table 2 below shows an exemplary mapping relationship between the values of N1' and N2' and the values of N1 and N2. Table 2 is for illustrative purposes only and may be predefined in a standard such as a 3GPP specification.

[0118] Table 2: Mapping relationship of supported configurations based on (N1, N2)

[0119]

[0120] According to Table 2, assuming that the CSI-RS resources in the first CSI reporting configuration are configured with 32 ports and (N1, N2) are configured as (8, 2), when port pattern #1 includes 24 ports, (N1', N2') can be determined as (6, 2), and when port pattern #1 includes 16 ports, (N1', N2') can be determined as (4, 2) (i.e., first mapped to (6, 2) corresponding to 24 ports and then mapped to (4, 2)), when port pattern #1 includes 12 ports, (N1', N2') can be determined as (3, 2) (i.e., (6, 2) -> (4, 2) -> (3, 2)), when port pattern #1 includes 8 ports, (N1', N2') can be determined as (2, 2) (i.e., (6, 2) -> (4, 2) -> (3, 2) -> (2, 2)), and when port pattern #1 includes 4 ports, (N1', N2') can be determined as (2, 1).

[0121] In some embodiments, the values of N1' and N2' associated with the codebook configuration for port mode #1 may be determined based on port mode #1. For example, assuming that port mode #1 is port subset mode 300a or port subset mode 300b, which corresponds to (N1, N2) = (3, 2), the values of N1' and N2' may be determined as (N1', N2') = (3, 2). For example, assuming that port mode #1 is port subset mode 300c, which corresponds to (N1, N2) = (6, 1), the values of N1' and N2' may be determined as (N1', N2') = (6, 1).

[0122] The codebook subset restriction configuration for port mode #1 may also be determined by the first codebook configuration. For example, the xth bit in the codebook configuration for port mode #1 may be determined by the nth bit in the first codebook configuration, where 1<=x<=X' and 1<=n<=N, X' is related to N1' and N2', and N is related to N1 and N2.

[0123] For example, the following pseudo-code shows an exemplary codebook subset restriction for a Type I single panel, which shows the relationship between the values of N1 and N2 and the value of N. The value of X' can be determined based on such a relationship and the values of N1' and N2'.

[0124]

[0125] For example, assuming that the CSI-RS resources in the first CSI reporting configuration are configured with 32 ports and (N1, N2) are configured as (8, 2), the codebook subset restriction configuration from the first codebook configuration is 256 bits (i.e., N=256) for a Type I single panel (i.e., corresponding to the "eight-two-TypeI-SinglePanel-Restriction bit string (size (256))" in the above pseudo code). In some embodiments, assuming that the first indication indicates a port mode with 16 ports, (N1', N2') can be determined as (4, 2) according to Table 2. Then, according to the above pseudo code, X'=128 (i.e., corresponding to the "four-two-TypeI-SinglePanel-Restriction bit string (size (128))"). The xth (1<=x<=128)th codebook subset restriction for the indicated port mode may be the round(x*(256 / 128))th bit from the first codebook configuration. Any other mapping relationship between codebook subset restrictions may also be used.

[0126] It will be understood by those skilled in the art that although some of the above-described embodiments are described with respect to a specific codebook type, these embodiments are similarly applicable to any codebook type.

[0127] In some embodiments of the present disclosure, at least one of one or more CSI reporting configurations (e.g., a first CSI reporting configuration) may indicate a PUCCH resource for a single CSI (denoted as PUCCH#1 for clarity) and another PUCCH resource for multiple CSIs (denoted as PUCCH#2 for clarity).

[0128] For example, the CSI-RS resources in the first CSI reporting configuration may be configured with a port number of 32, and the first indication may indicate {24, 12}. In some examples, when, for example, multi-CSI is activated, the first CSI report may include multiple CSIs (e.g., CSIs associated with 24 ports and 12 ports, respectively) and may be transmitted on PUCCH #2. In some examples, the first CSI report may include only a single CSI associated with a port number of 32 (e.g., when multi-CSI is not activated or deactivated) and may be transmitted on PUCCH #1.

[0129] For example, the CSI-RS resources in the first CSI reporting configuration may be configured with a port number of 24, and the first indication may indicate mode 1 and mode 2. In some examples, when, for example, multi-CSI is activated, the first CSI report may include multiple CSIs (e.g., CSIs for mode 1 and mode 2) and may be transmitted on PUCCH # 2. In some examples, the first CSI report may include only a single CSI associated with a port number of 24 (e.g., when multi-CSI is not activated or deactivated) and may be transmitted on PUCCH # 1.

[0130] For example, the CSI-RS resources in the first CSI reporting configuration may be configured with a port number of 32, and the first indication may indicate {1 / 2, 1 / 4}. In some examples, when, for example, multi-CSI is activated, the first CSI report may include multiple CSIs (e.g., CSIs associated with 16 ports and 8 ports) and may be transmitted on PUCCH #2. In some examples, the first CSI report may include only a single CSI associated with a port number of 32 (e.g., when multi-CSI is not activated or deactivated) and may be transmitted on PUCCH #1.

[0131] For example, the first indication may indicate that multiple CSIs should be included in the CSI report. A set of port numbers may be predefined as {24, 12}, and the CSI-RS resources in the first CSI reporting configuration may be configured with a port number of 32. In some examples, when, for example, multi-CSI is activated, the first CSI report may include multiple CSIs (e.g., CSI associated with 24 ports and 12 ports) and may be transmitted on PUCCH #2. In some examples, the first CSI report may include only a single CSI associated with a port number of 32 (e.g., when multi-CSI is not activated or deactivated) and may be transmitted on PUCCH #1.

[0132] For example, reference Figure 4a , the UE may be configured with CSI reporting configuration #1 and may receive a first indication with multi-CSI related information (e.g., the number of ports or port mode as described above). CSI reporting configuration #1 may indicate more than one PUCCH resource for one corresponding BWP for periodic CSI or semi-persistent CSI on PUCCH. For example, CSI reporting configuration #1 may indicate PUCCH #A for a single CSI and PUCCH #B for multiple CSI. Time T0 represents the timing when multi-CSI reporting becomes valid. Before time T0, the UE may transmit CSI reports 411 and 412 on PUCCH #A, each CSI report including a single CSI. After time T0, the UE may transmit CSI report 413 including multiple CSI on PUCCH #B.

[0133] In some embodiments of the present disclosure, at least one of the one or more CSI reporting configurations (e.g., the first CSI reporting configuration) may indicate a PUCCH resource (denoted as PUCCH#1' for clarity). When the first CSI report includes multiple CSIs, each of the multiple CSIs may be carried on a corresponding time instance of PUCCH#1'.

[0134] For example, reference Figure 4b , the UE may be configured with CSI reporting configuration #2 and may receive a first indication with multiple CSI related information. CSI reporting configuration #2 may indicate only one PUCCH resource for one corresponding BWP for periodic CSI or semi-persistent CSI on PUCCH. For example, CSI reporting configuration #2 may indicate PUCCH #C for CSI reporting. Assuming multiple CSI reporting in Figure 4b In the case where the first indication has become effective, the UE may need to report multiple CSIs, including CSI for the number of ports (or port pattern) indicated by the first indication, CSI for the number of ports associated with the associated CSI-RS resources, or both.

[0135] For example, assuming that the CSI-RS resource in CSI reporting configuration #2 is configured with a port number of 32, and the first indication indicates {24, 12}, the CSI report corresponding to CSI reporting configuration #2 may include CSI associated with the port number of 32 (e.g., CSI421), CSI associated with the port number of 24 (e.g., CSI422), and CSI associated with the port number of 12 (e.g., CSI423). Figure 4b As shown in FIG, the UE may transmit three CSIs on the corresponding time instances of PUCCH#C.

[0136] Return Reference Figure 9 In some embodiments of the present disclosure, the UE may receive another indication (denoted as a “second indication” for clarity) for activating multiple CSI reporting in the CSI report.

[0137] As described above, the UE may receive one or more CSI reporting configurations. In some embodiments of the present disclosure, the second indication may activate at least one CSI reporting configuration configured with multiple CSI reports among the one or more CSI reporting configurations.

[0138] A CSI reporting configuration configured (or configured with) multiple CSI reports may be a CSI reporting configuration configured with or including a corresponding first indication, wherein the corresponding first indication indicates at least one of the following: one or more numbers of ports, one or more port subset modes, one or more port number scaling factors, or inclusion of multiple CSIs in the CSI report. The at least one CSI reporting configuration may or may not include the first CSI reporting configuration described above.

[0139] In response to receiving the second indication, the multiple CSI report in the report may be applied to all CSI reporting configurations configured with multiple CSI reporting at the UE. For example, the first CSI reporting configuration mentioned above may be configured with multiple CSI reporting (via a corresponding first indication transmitted via RRC signaling or via DCI or MAC CE). Prior to receiving the second indication, the multiple CSI report in the report may not be activated or may be deactivated, and thus the first CSI report may include only one CSI. However, in response to receiving the second indication, the first CSI report may include multiple CSIs based on the first CSI reporting configuration and the corresponding first indication.

[0140] In some embodiments of the present disclosure, the second indication may be a DCI including a CSI request field or an SP CSI report regarding a PUCCH activation / deactivation MAC CE.

[0141] For example, as described above, a CSI request in a DCI may indicate a triggering status that may be associated with a CSI reporting configuration or a CSI reporting configuration list. The UE may validate the DCI as DCI for CSI activation. When at least one CSI reporting configuration in the associated CSI reporting configuration or the associated CSI reporting configuration list is configured with multi-CSI reporting, multi-CSI reporting is activated at the UE and may be applied to all CSI reporting configurations configured with multi-CSI reporting.

[0142] For example, Figure 8 An exemplary SP CSI report for PUCCH activation / deactivation MAC CE 800 is described. Figure 8 , MAC CE 800 may include 16 bits, of which "Serving Cell ID" indicates the identity of the serving cell to which the MAC CE is applied and includes 5 bits; "BWPID" indicates the ID of the downlink BWP to which the MAC CE is applied and includes 2 bits; "R" indicates a reserved bit and may be set to "0"; and "S i ”(i∈{0,1,2,3}) represents the SP CSI reporting configuration to be activated or deactivated. For example, S i = "1" may indicate that the corresponding SP CSI reporting configuration should be activated, and S i ='0' may indicate that the corresponding SP CSI reporting configuration should be deactivated, or vice versa.

[0143] The UE may receive an SP CSI report in response to a PUCCH activation / deactivation MAC CE that activates at least one SP CSI reporting configuration configured with multi-CSI reporting. In response to receiving the MAC CE, the UE may apply the multi-CSI reporting in the report to all CSI reporting configurations configured with multi-CSI reporting (including but not limited to the at least one activated SP CSI reporting configuration).

[0144] For example, reference Figure 5 , the UE may be configured with periodic CSI reporting configuration #A1 with periodicity #1 and periodic CSI reporting configuration #A2 with periodicity #2. In some examples, both CSI reporting configuration #A1 and CSI reporting configuration #A2 may be configured with multiple CSI reports. In some examples, CSI reporting configuration #A1 may be an SP CSI reporting configuration. In some examples, CSI reporting configuration #A2 may be a periodic CSI reporting configuration.

[0145] The UE may receive DCI 540 activating CSI reporting configuration #A1. Multiple CSI reporting activation may become effective after an offset 560 from the DCI (e.g., at time T0). The value of offset 560 may be predefined, preconfigured, or configured. Since CSI reports 511 and 512 corresponding to CSI reporting configuration #A1 are transmitted after time T0, CSI reports 511 and 512 may include multiple CSIs. The method for generating multiple CSIs described above may also be applied here.

[0146] The multiple CSI reporting indication also applies to CSI reporting configuration #A2. Since CSI report 521 corresponding to CSI reporting configuration #A2 is not transmitted after time T0 (e.g., not all resources used to transmit CSI are after time T0), CSI report 521 may include a single CSI. Since CSI report 522 corresponding to CSI reporting configuration #A2 is transmitted after time T0, CSI report 522 may include multiple CSIs. The method for generating multiple CSIs described above is applicable here.

[0147] Return Reference Figure 9 As described above, the first CSI reporting configuration may be configured with multiple CSI reports, and the first CSI report may include multiple CSIs in response to receiving the second indication. In some embodiments of the present disclosure, the first CSI report may include a single CSI (i.e., "multiple CSIs in a CSI report" is deactivated) in response to one of the following conditions: the UE receives a port adaptation indication, the UE receives a third indication to deactivate multiple CSI reports in the CSI report, or after a time offset from the receipt of the second indication. The value of the time offset may be predefined, preconfigured, or configured.

[0148] In some embodiments of the present disclosure, the third indication may be a DCI containing a CSI request field or a MAC CE regarding PUCCH activation / deactivation (e.g., Figure 8 SP CSI report of MAC CE 800).

[0149] For example, as described above, a CSI request in a DCI may indicate a triggering status that may be associated with a CSI reporting configuration or a CSI reporting configuration list. The UE may verify the DCI as DCI for CSI deactivation. When at least one CSI reporting configuration in the associated CSI reporting configuration or the associated CSI reporting configuration list is configured with multi-CSI reporting, multi-CSI reporting in the report is deactivated and may apply to all CSI reporting configurations configured with multi-CSI reporting.

[0150] For example, when all CSI reporting configurations configured with multiple CSI reports among the CSI reporting configurations that can be indicated by the MAC CE are deactivated, the UE may receive an SP CSI report regarding the PUCCH activation / deactivation MAC CE, which provides several SP CSI reporting configurations (e.g., Figure 8 S in i Indicates the status (i.e., activated or deactivated) of the multiple CSI report in the report, the multiple CSI report is deactivated and is applicable to all CSI reporting configurations configured with multiple CSI reporting.

[0151] For example, reference Figure 6 , the UE may be configured with periodic CSI reporting configuration #B1 with periodicity #1 and periodic CSI reporting configuration #B2 with periodicity #2. In some instances, both CSI reporting configuration #B1 and CSI reporting configuration #B2 may be configured with multiple CSI reports. In some instances, CSI reporting configuration #B1 may be an SP CSI reporting configuration. In some instances, CSI reporting configuration #B2 may be a periodic CSI reporting configuration. Assuming that multiple CSI reporting is activated in the report, the UE may transmit CSI reports corresponding to CSI reporting configuration #B1 and CSI reporting configuration #B2, and these CSI reports may include multiple CSIs.

[0152] The UE may then receive a port adaptation indication 640 (eg, adjusting the number of ports from 32 to 16), which may become valid after an offset 660 (eg, at time T0) from the port adaptation indication 640. The value of the offset 660 may be predefined, preconfigured, or configured.

[0153] Since CSI report 611 and CSI report 612 corresponding to CSI reporting configuration #B1 are transmitted after time T0, CSI report 611 and CSI report 612 may include a single CSI. Since CSI report 621 corresponding to CSI reporting configuration #B2 is not transmitted after time T0, CSI report 621 may still include multiple CSIs. Since CSI report 622 corresponding to CSI reporting configuration #B2 is transmitted after time T0, CSI report 622 may include a single CSI.

[0154] It should be noted that if Figure 6 If the port adaptation indication 640 in is replaced by the third indication (ie, the semi-persistent CSI deactivation signal) to deactivate the CSI reporting configuration #B1, then the CSI report 611 and the CSI report 612 may not be transmitted.

[0155] For example, reference Figure 7 , the UE may be configured with periodic CSI reporting configuration #C1 with periodicity #1 and periodic CSI reporting configuration #C2 with periodicity #2. In some examples, both CSI reporting configuration #C1 and CSI reporting configuration #C2 may be configured with multiple CSI reports. In some examples, CSI reporting configuration #C1 may be an SP CSI reporting configuration. In some examples, CSI reporting configuration #C2 may be a periodic CSI reporting configuration.

[0156] The UE may receive DCI 740 activating CSI reporting configuration #C1. Multiple CSI reporting activation may become effective after offset 760 from the DCI (e.g., at time T0). In some embodiments, multiple CSI reporting may become deactivated (e.g., at time T1) after a certain time from receiving DCI 740 (e.g., offset 760 + offset 761) or after a certain time from time T0 (e.g., offset 761). The value of offset 760, the value of offset 761, and / or the value of offset 760 + offset 761 may be predefined, preconfigured, or configured.

[0157] Since CSI reports 711 and 712 corresponding to CSI reporting configuration #C1 are transmitted after time T0 and before time T1, CSI reports 711 and 712 may include multiple CSIs. Since CSI report 713 corresponding to CSI reporting configuration #C1 is transmitted after time T1, CSI report 713 may include a single CSI.

[0158] Since CSI report 721 corresponding to CSI reporting configuration #C2 is not transmitted after time T0, and CSI report 723 corresponding to CSI reporting configuration #C2 is transmitted after time T1, CSI report 721 and CSI report 723 may include a single CSI. Since CSI report 722 corresponding to CSI reporting configuration #C2 is transmitted after time T0 and before time T1, CSI report 722 may include multiple CSIs.

[0159] In some embodiments of the present disclosure, the first indication may reuse a reserved bit in the SPCSI report regarding the PUCCH activation / deactivation MAC CE.

[0160] For example, the SP CSI report on the PUCCH activation / deactivation MAC CE may indicate the number of ports or port mode to be reported. Figure 8 , MAC CE 800 may be used to activate or deactivate multi-CSI reporting. All or some of the five "R" bits of MAC CE 800 may be used to indicate the number of ports or port mode to be reported. For example, the indicated number of ports or port mode may apply to the SP CSI reporting configuration activated by MAC CE 800. For example, the indicated number of ports or port mode may apply to one or more CSI reporting configurations. In an example, if all reserved bits are "0" (i.e., set to a predefined value), multi-CSI reporting is not activated or is deactivated.

[0161] Those skilled in the art will appreciate that the order of operations in the exemplary process 900 may be changed, and some operations in the exemplary process 900 may be eliminated or modified without departing from the spirit and scope of the present disclosure.

[0162] Figure 10 A flowchart illustrating an exemplary procedure 1000 for wireless communication according to some embodiments of the present disclosure. Figure 10 In some examples, the program may be performed by a BS (e.g., Figure 1 BS102 in is executed.

[0163] refer to Figure 10 In operation 1011, the BS may transmit one or more CSI report configurations to the UE, wherein each of the one or more CSI report configurations is associated with one or more CSI-RS resources, each of the one or more CSI-RS resources being configured with a corresponding number of ports. The description regarding the CSI report configuration in the aforementioned embodiment may apply here.

[0164] In operation 1013, the BS may transmit a first indication to the UE indicating at least one of the following parameters for CSI reporting: one or more numbers of ports, one or more port subset modes, one or more port number scaling factors, whether the CSI report includes single CSI or multiple CSIs, or one or more codebook configurations. The description of the first indication in the aforementioned embodiment may apply here.

[0165] In operation 1015, the BS may receive a first CSI report from the UE based on a first CSI reporting configuration of the one or more CSI reporting configurations and a first indication. The description of the first CSI reporting configuration and the first CSI report in the above embodiments may be applicable here.

[0166] In some embodiments of the present disclosure, the first indication is transmitted via RRC signaling. In some embodiments of the present disclosure, the first indication is included in a DCI or a MAC CE.

[0167] In some embodiments of the present disclosure, the first CSI reporting configuration indicates at least one of: a set number of ports, a set of port subset modes, a set of port number scaling factors, whether a CSI report includes a single CSI or multiple CSIs, or a set of codebook configurations. In some embodiments of the present disclosure, the one or more port numbers are selected from the set of port numbers. In some embodiments of the present disclosure, the one or more port subset modes are selected from the set of port subset modes. In some embodiments of the present disclosure, the one or more port number scaling factors are selected from the set of port number scaling factors. In some embodiments of the present disclosure, the one or more codebook configurations may be selected from the set of codebook configurations.

[0168] In some embodiments of the present disclosure, the first CSI report includes CSI for each of one or more port quantities. In some embodiments of the present disclosure, the first CSI report includes CSI for each of one or more port subset modes. In some embodiments of the present disclosure, the first CSI report includes CSI corresponding to each of one or more port quantity scaling factors. In some embodiments of the present disclosure, the first CSI report includes CSI for each of a set of predefined port quantities. In some embodiments of the present disclosure, the first CSI report includes CSI for each of a set of predefined port subset modes. In some embodiments of the present disclosure, the first CSI report includes CSI corresponding to each of a set of predefined port quantity scaling factors. In some embodiments of the present disclosure, the first CSI report includes CSI corresponding to each of one or more codebook configurations.

[0169] In some embodiments of the present disclosure, the description on codebook configuration in the foregoing embodiments may be applicable here.

[0170] For example, in some embodiments of the present disclosure, the first CSI report configuration indication corresponds to a codebook configuration corresponding to each of one or more port numbers, each of one or more port subset modes, each of one or more port number scaling factors, each of a set of predefined port numbers, each of a set of predefined port subset modes, or each of a set of predefined port number scaling factors.

[0171] In some embodiments of the present disclosure, a first CSI reporting configuration indicates a first codebook configuration for a corresponding number of ports. A codebook configuration corresponding to each of one or more numbers of ports, each of one or more port subset modes, each of one or more number of port scaling factors, each of a set of predefined numbers of ports, each of a set of predefined port subset modes, or each of a set of predefined number of port scaling factors is based on the first codebook configuration.

[0172] In some embodiments of the present disclosure, the description on PUCCH resource indication in the foregoing embodiments may be applicable here.

[0173] In some embodiments of the present disclosure, the first CSI reporting configuration indicates a first PUCCH resource for a single CSI (eg, PUCCH#1 as described above) and a second PUCCH resource for multiple CSIs (eg, PUCCH#2 as described above).

[0174] In some embodiments of the present disclosure, a first CSI report configuration indicates a first PUCCH resource (e.g., PUCCH#1′ as described above). The first CSI report may include multiple CSIs. Receiving the first CSI report may include receiving each of the multiple CSIs at a corresponding time instance of the first PUCCH resource.

[0175] In some embodiments of the present disclosure, the BS may transmit a second indication to the UE to activate the multiple CSI report in the CSI report. In some embodiments of the present disclosure, the description of the second indication in the above embodiments may be applicable hereto.

[0176] For example, in some embodiments of the present disclosure, the second indication activates at least one CSI reporting configuration configured with multiple CSI reports among the one or more CSI reporting configurations. The first indication may configure the first CSI reporting configuration to have multiple CSI reports. Receiving the first CSI report may include receiving the first CSI report including multiple CSIs in response to the transmission of the second indication.

[0177] In some embodiments of the present disclosure, in response to the BS transmitting a port adaptation indication to the UE, or in response to the BS transmitting a third indication to the UE to deactivate multiple CSI reporting in the CSI report, or after a time offset from the transmission of the second indication, the first CSI report may include a single CSI. In some embodiments of the present disclosure, the description of the third indication in the preceding embodiments may apply here.

[0178] In some embodiments of the present disclosure, the second or third indication is a DCI containing a CSI request field or an SP CSI report regarding a PUCCH activation / deactivation MAC CE.

[0179] In some embodiments of the present disclosure, the first indication reuses a reserved bit in the SP CSI report regarding the PUCCH activation / deactivation MAC CE.

[0180] Those skilled in the art will appreciate that the order of operations in the exemplary process 1000 may be changed, and some operations in the exemplary process 1000 may be eliminated or modified without departing from the spirit and scope of the present disclosure.

[0181] Figure 11 1 is a block diagram illustrating an exemplary device 1100 according to some embodiments of the present disclosure. Figure 11 , apparatus 1100 may include at least one processor 1106 and at least one transceiver 1102 coupled to the processor 1106. Apparatus 1100 may be a UE or a BS.

[0182] Although elements such as at least one transceiver 1102 and a processor 1106 are depicted in the singular in this figure, the plural is contemplated unless limitation to the singular is explicitly stated. In some embodiments of the present application, the transceiver 1102 may be divided into two devices, such as a receive circuit system and a transmit circuit system. In some embodiments of the present application, the apparatus 1100 may further include an input device, a memory, and / or other components.

[0183] In some embodiments of the present application, the device 1100 may be a UE. The transceiver 1102 and the processor 1106 may interact with each other to perform Figures 1 to 10 In some embodiments of the present application, the device 1100 may be a BS. The transceiver 1102 and the processor 1106 may interact with each other to perform Figures 1 to 10 The operation of BS is described in .

[0184] In some embodiments of the present application, the apparatus 1100 may further include at least one non-transitory computer-readable medium.

[0185] For example, in some embodiments of the present disclosure, a non-transitory computer-readable medium may store thereon computer-executable instructions to cause the processor 1106 to implement the method described above with respect to the UE. For example, when the computer-executable instructions are executed, the processor 1106 interacts with the transceiver 1102 to perform Figures 1 to 10 The operations of the UE are described in .

[0186] In some embodiments of the present disclosure, a non-transitory computer-readable medium may store thereon computer-executable instructions to cause the processor 1106 to implement the method described above with respect to the BS. For example, when the computer-executable instructions are executed, the processor 1106 interacts with the transceiver 1102 to perform Figures 1 to 10 The operation of BS is described in .

[0187] Those skilled in the art will appreciate that the operations or steps of the methods described in conjunction with the aspects disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of both. The software module may reside in 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. Additionally, in some aspects, the operations or steps of the methods may reside as one or any combination or set of codes and / or instructions on a non-transitory computer-readable medium, which may be incorporated into a computer program product.

[0188] Although the present disclosure has been described using specific embodiments of the present disclosure, it is apparent that many alternatives, modifications, and variations may be apparent to those skilled in the art. For example, various components of the embodiments may be interchanged, added, or replaced in other embodiments. Furthermore, not all elements of each figure are necessary for the operation of the disclosed embodiments. For example, it will enable those skilled in the art of the disclosed embodiments to make and use the teachings of the present disclosure by simply adopting the elements of the independent claims. Therefore, the embodiments of the present disclosure as set forth herein are intended to be illustrative, not restrictive. Various changes may be made without departing from the spirit and scope of the present disclosure.

[0189] In this document, the terms "include", "comprising" or any other variants thereof are intended to encompass non-exclusive inclusion, such that the process, method, article or device comprising a list of elements not only comprises those elements, but may also comprise other elements that are not explicitly listed or inherent to such process, method, article or device. Elements beginning with "one", "an" or the like do not exclude the presence of additional identical elements in the process, method, article or device comprising the elements without further restrictions. In addition, the term "another" is defined as at least a second or more. As used herein, the term "having" and the like are defined as "comprising". For example, the expression "A and / or B" or "at least one of A and B" may include any and all combinations of the words enumerated together with the expression. For example, the expression "A and / or B" or "at least one of A and B" may include A, B or both A and B. The phrases "first", "second" or the like are only used to clearly illustrate the embodiments of the present application and are not used to limit the essence of the present application.

Claims

1. A user equipment (UE), comprising: transceiver; and a processor coupled to the transceiver, wherein the processor is configured to: receiving one or more channel state information (CSI) reporting configurations, wherein each of the one or more CSI reporting configurations is associated with one or more CSI reference signal (CSI-RS) resources, each of the one or more CSI-RS resources being configured with a corresponding number of ports; receiving a first indication indicating at least one of the following parameters for CSI reporting: one or more numbers of ports, one or more port subset modes, one or more port number scaling factors, whether a single CSI or multiple CSIs are included in the CSI report, or one or more codebook configurations; and A first CSI report is generated based on a first CSI reporting configuration of the one or more CSI reporting configurations and the first indication.

2. The UE according to claim 1, wherein the first indication is received via radio resource control (RRC) signaling; or The first indication is included in downlink control information DCI or medium access control MAC control element CE.

3. The UE of claim 1 , wherein the first CSI reporting configuration indicates at least one of: a set of port numbers, a set of port subset modes, a set of port number scaling factors, whether a single CSI or multiple CSIs are included in the CSI report, or a set of codebook configurations.

4. The UE according to claim 3, wherein the one or more port quantities are selected from the group of port quantities; or wherein the one or more port subset patterns are selected from the set of port subset patterns; or wherein the one or more port number scaling factors are selected from the set of port number scaling factors; or wherein the one or more codebook configurations are selected from the set of codebook configurations.

5. The UE of claim 1 , wherein the first CSI report comprises CSI for each of the one or more port quantities; or wherein the first CSI report includes CSI for each of the one or more port subset patterns; or wherein the first CSI report includes CSI corresponding to each of the one or more port number scaling factors; or wherein the first CSI report comprises CSI for each of a set of predefined number of ports; or wherein the first CSI report comprises CSI for each of a set of predefined port subset patterns; or wherein the first CSI report includes CSI corresponding to each of a set of predefined number of port scaling factors; or The first CSI report includes CSI corresponding to each of the one or more codebook configurations.

6. The UE of claim 1 , wherein the first CSI reporting configuration indicates a first codebook configuration for the corresponding number of ports, and wherein a codebook configuration corresponding to each of the one or more numbers of ports, each of the one or more port subset modes, each of the one or more port number scaling factors, each of a set of predefined numbers of ports, each of a set of predefined port subset modes, or each of a set of predefined port number scaling factors is based on the first codebook configuration. 7 . The UE according to claim 1 , wherein the first CSI reporting configuration indicates a first physical uplink control channel (PUCCH) resource for a single CSI and a second PUCCH resource for a plurality of CSIs.

8. The UE according to claim 1, wherein the first CSI reporting configuration indicates a first physical uplink control channel (PUCCH) resource, the first CSI report includes a plurality of CSIs, and each of the plurality of CSIs is carried at a corresponding time instance of the first PUCCH resource. 9 . The UE according to claim 1 , wherein the processor is further configured to receive a second indication to activate multiple CSI reporting in a CSI report.

10. The UE according to claim 10, wherein the second indication activates at least one CSI reporting configuration configured with multiple CSI reporting among the one or more CSI reporting configurations; and The first indication configures the first CSI report configuration to have multiple CSI reports, and the first CSI report includes multiple CSIs in response to the receipt of the second indication.

11. The UE of claim 10, wherein the first CSI report includes a single CSI in response to the UE receiving a port adaptation indication, or in response to the UE receiving a third indication to deactivate multiple CSI reporting in a CSI report, or after a time offset from the receipt of the second indication.

12. The UE according to claim 10 or 12, wherein the second or third indication is downlink control information (DCI) including a CSI request field or a semi-persistent SP CSI report on a physical uplink control channel (PUCCH) activation / deactivation medium access control (MAC) control element (CE). 13 . The UE according to claim 1 , wherein the first indication reuses a reserved bit in a semi-persistent SP CSI report on a Physical Uplink Control Channel (PUCCH) activation / deactivation Medium Access Control (MAC) Control Element (CE).

14. A base station BS, comprising: transceiver; and a processor coupled to the transceiver, wherein the processor is configured to: transmitting one or more channel state information (CSI) reporting configurations to a user equipment (UE), wherein each of the one or more CSI reporting configurations is associated with one or more CSI reference signal (CSI-RS) resources, each of the one or more CSI-RS resources being configured with a respective number of ports; transmitting a first indication to the UE indicating at least one of the following parameters for CSI reporting: one or more numbers of ports, one or more port subset modes, one or more number of ports scaling factors, whether a single CSI or multiple CSIs are included in a CSI report, or one or more codebook configurations; and A first CSI report is received from the UE based on a first CSI reporting configuration of the one or more CSI reporting configurations and the first indication.

15. A method performed by a user equipment (UE), comprising: receiving one or more channel state information (CSI) reporting configurations, wherein each of the one or more CSI reporting configurations is associated with one or more CSI reference signal (CSI-RS) resources, each of the one or more CSI-RS resources being configured with a corresponding number of ports; receiving a first indication indicating at least one of the following parameters for CSI reporting: one or more numbers of ports, one or more port subset modes, one or more port number scaling factors, whether a single CSI or multiple CSIs are included in the CSI report, or one or more codebook configurations; and A first CSI report is generated based on a first CSI reporting configuration of the one or more CSI reporting configurations and the first indication.

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