Method, apparatus and computer program product for wireless communication

Abstract

A wireless communication method is disclosed. The method comprises: receiving, by a wireless communication terminal from a wireless communication node, at least one channel state information (CSI) reporting configuration associated with a channel state information reference signal (CSI-RS) resource setting for channel measurement, the CSI-RS resource setting comprising one or more CSI-RS resources associated with one or more adaptation modes; and performing, by the wireless communication terminal, CSI reporting according to the at least one CSI reporting configuration.

Description

[0001] The present application is generally directed to wireless communications, and in particular to fifth generation (5G) or sixth generation (6G) communications.

[0002] CSI (Channel State Information) plays a crucial role in 5G communications. It refers to the knowledge or information about the wireless channel conditions between user equipment and base stations. CSI provides valuable insights into factors such as signal quality, interference levels, and available resources.

[0003] In 5G communication systems, CSI is used to optimize various aspects of network performance. It helps determine the best transmission parameters, such as modulation and coding schemes, beamforming, and resource allocation, to improve data rates and overall system efficiency. By continuously monitoring and updating CSI, 5G networks can dynamically adapt and optimize their operations based on real-time channel conditions, resulting in improved network capacity, reliability, and user experience. The configuration and adoption of CSI remain a topic of discussion.

[0004] The present application relates to methods, systems, and computer program products for wireless communications.

[0005] One aspect of the present disclosure relates to a wireless communication method. In one embodiment, the wireless communication method comprises: receiving, by a wireless communication terminal from a wireless communication node, at least one channel state information, CSI, report configuration associated with a channel state information reference signal, CSI-RS, resource setting for channel measurement, wherein the CSI-RS resource setting comprises one or more CSI-RS resources associated with one or more adaptation patterns; and performing, by the wireless communication terminal, CSI reporting according to the at least one CSI report configuration.

[0006] Another aspect of the present disclosure relates to a wireless communication method. In one embodiment, the wireless communication method comprises: transmitting, by a wireless communication node to a wireless communication terminal, at least one channel state information, CSI, report configuration associated with a channel state information reference signal, CSI-RS, resource setting for channel measurement, to allow the wireless communication terminal to perform CSI reporting according to the at least one CSI report configuration, wherein the CSI-RS resource setting comprises one or more CSI-RS resources associated with one or more adaptation patterns.

[0007] Another aspect of the present disclosure relates to a wireless communication terminal. In one embodiment, the wireless communication terminal comprises a communication unit and a processor. The processor is configured to: receive, from a wireless communication node via the communication unit, at least one channel state information, CSI, reporting configuration associated with a channel state information reference signal, CSI-RS, resource setting for channel measurement, wherein the CSI-RS resource setting comprises one or more CSI-RS resources associated with one or more adaptation modes; and perform a CSI report according to the at least one CSI reporting configuration.

[0008] Another aspect of the present disclosure relates to a wireless communication node. In one embodiment, the wireless communication node comprises a communication unit and a processor. The processor is configured to: transmit, to a wireless communication terminal via the communication unit, at least one channel state information, CSI, reporting configuration associated with a channel state information reference signal, CSI-RS, resource setting for channel measurement, to allow the wireless communication terminal to perform a CSI report according to the at least one CSI reporting configuration, wherein the CSI-RS resource setting comprises one or more CSI-RS resources associated with one or more adaptation modes.

[0009] Various embodiments can preferably implement the following features:

[0010] Preferably, in response to the first condition being satisfied, the wireless communication terminal reports, to the wireless communication node, the CSI without the overhead reduction, and the first condition comprises at least one of:

[0011] The CSI reporting configuration corresponding to the CSI indicates that the CSI report is aperiodic;

[0012] The CSI reporting configuration corresponding to the CSI is activated or triggered by downlink control information, DCI;

[0013] The wireless communication terminal is configured with radio resource control, RRC, signaling indicating to report the CSI without the overhead reduction;

[0014] The CSI reporting configuration corresponding to the CSI comprises more than one codebook configuration parameter set;

[0015] The wireless communication terminal does not receive an indication indicating a reference adaptation mode;

[0016] The wireless communication terminal receives an indication indicating to report the CSI without the overhead reduction;

[0017] The CSI report is transmitted in a physical uplink shared channel;

[0018] A number of CSIs in the CSI report is less than a threshold;

[0019] a number of adaptation modes associated with corresponding CSI report configurations is less than a threshold; or

[0020] a number of CSI processing units of the wireless communication terminal is greater than or equal to a threshold.

[0021] Preferably, in response to the second condition being satisfied, the wireless communication terminal reports reduced-overhead CSI to the wireless communication node, and the second condition comprises at least one of:

[0022] the wireless communication terminal receives an indication to report reduced-overhead CSI;

[0023] the wireless communication terminal is configured with RRC signaling indicating to report reduced-overhead CSI;

[0024] the wireless communication terminal receives an indication indicating a reference adaptation mode;

[0025] a number of CSIs is equal to a number of adaptation modes associated with corresponding CSI report configurations;

[0026] a CSI report configuration corresponding to the CSI is associated with the first resource setting;

[0027] the CSI report is transmitted in a physical uplink control channel;

[0028] a number of CSIs in the CSI report is greater than or equal to a threshold;

[0029] a number of adaptation modes associated with corresponding CSI report configurations is greater than or equal to a threshold; or

[0030] the CSI report configuration corresponding to the CSI comprises at least one of: one or more port subset indications, only one codebook configuration parameter set, or more than one CSI report quantity.

[0031] Preferably, the first resource setting comprises at least one of:

[0032] a resource set comprising only one resource; or

[0033] a plurality of resources, each resource being configured with a group index or an adaptation mode.

[0034] Preferably, the wireless communication terminal reports CSI without overhead reduction every M CSI reporting occasions, and M is an integer greater than 1.

[0035] Preferably, the CSI report configuration comprises L sub-configurations associated with K uplink resource configurations, L and K being integers, each uplink resource configuration corresponding to one or more of the L sub-configurations, and one or more CSIs corresponding to one or more of the L sub-configurations associated with a corresponding uplink resource configuration are reported according to the corresponding uplink resource configuration.

[0036] Preferably, one or more first CSIs based on a corresponding one or more of the L sub-configurations are reported via a corresponding first uplink resource configuration without overhead reduction.

[0037] Preferably, the first uplink resource configuration is a first uplink resource configuration configured in the CSI report configuration, or is a lowest-indexed uplink resource configuration in the CSI report configuration.

[0038] Preferably, each uplink resource configuration is at least one of:

[0039] configured semiPersistentOnPUSCH;

[0040] configured semiPersistentOnPUCCH;

[0041] configured periodic;

[0042] configured reportSlotConfig; or

[0043] configured pucch-CSI-ResourceList.

[0044] Preferably, the wireless communication terminal receives an indication to activate a CSI-RS resource setting of the CSI-RS resource settings, a part of the adaptation modes associated with a CSI report configuration corresponding to the CSI-RS resource setting, or a part of the adaptation modes associated with the CSI-RS resource setting.

[0045] Preferably, the wireless communication terminal receives an indication to activate a CSI report configuration and a part of the sub-configurations of all sub-configurations or a part of the adaptation modes associated with the CSI report configuration to be activated.

[0046] Preferably, after the wireless communication terminal receives the first signaling, the wireless communication terminal is capable of receiving second signaling, the first signaling having a first field indicating a first trigger state for activating a CSI reporting configuration and a second field activating a first part of the sub-configurations or a first part of the adaptation modes associated with the CSI reporting configuration to be activated, the second signaling having a first field indicating a second trigger state for activating the CSI reporting configuration and a second field activating a second part of the sub-configurations or a second part of the adaptation modes associated with the CSI reporting configuration to be activated, wherein the first part of the sub-configurations and the second part of the sub-configurations are different, or the first part of the adaptation modes and the second part of the adaptation modes are different.

[0047] Preferably, after the wireless communication terminal receives an indication of the first signaling for activating a CSI reporting configuration and a first part of the sub-configurations or a first part of the adaptation modes associated with the CSI reporting configuration to be activated, the wireless communication terminal is capable of receiving an indication of the second signaling for activating the CSI reporting configuration and a second part of the sub-configurations or a second part of the adaptation modes associated with the CSI reporting configuration to be activated, wherein the first trigger state indicated in the field of the first signaling indicates the CSI reporting configuration and the first part of the sub-configurations or the first part of the adaptation modes to be activated, the second trigger state indicated in the field of the second signaling indicates the CSI reporting configuration and the second part of the sub-configurations or the second part of the adaptation modes to be activated, and the first part of the sub-configurations and the second part of the sub-configurations are different, or the first part of the adaptation modes and the second part of the adaptation modes are different.

[0048] Preferably, the first signaling or the second signaling is a downlink control information DCI or a medium access control control element MAC CE, a bitmap is used for activating a part of the sub-configurations or a part of the adaptation modes associated with the CSI reporting configuration to be activated, each bit in the bitmap is associated with one or more sub-configurations or one or more adaptation modes, a first value of the bit indicates that the one or more corresponding sub-configurations or the one or more corresponding adaptation modes are not activated or are deactivated, and a second value different from the first value of the bit indicates that the one or more corresponding sub-configurations or the one or more corresponding adaptation modes are activated.

[0049] Preferably, the wireless communication terminal reports reduced overhead CSI including at least a differential RI, wherein the differential RI indicates an offset value between a first RI value and a second RI value, and is indicated in a 1-bit field, and one state of the 1-bit field represents an offset value of 0, and another state of the 1-bit field represents an offset value of -1.

[0050] Preferably, the wireless communication terminal reports reduced overhead CSI including at least a worst layer indication WLI, and the WLI indicates which column of a precoding matrix of a common PMI corresponds to the weakest layer of a codeword.

[0051] Preferably, the wireless communication node transmits an indication for activating a part of CSI reporting configurations, a part of adaptation modes associated with a CSI reporting configuration corresponding to a CSI-RS resource setting, or a part of adaptation modes associated with a CSI-RS resource setting in a CSI-RS resource setting.

[0052] Preferably, the wireless communication node transmits an indication for activating a part of CSI reporting configurations and a part of sub-configurations or a part of adaptation modes associated with the CSI reporting configurations to be activated.

[0053] Preferably, the wireless communication node receives reduced overhead CSI including at least a differential RI, wherein the differential RI indicates an offset value between a first RI and a second RI, and is indicated in a 1-bit field, and one state of the 1-bit field represents an offset value of 0, and another state of the 1-bit field represents an offset value of -1.

[0054] Preferably, the wireless communication node receives reduced overhead CSI including at least a worst layer indication WLI, and the WLI indicates which column of a precoding matrix of a common PMI corresponds to the weakest layer of a codeword.

[0055] The present disclosure also relates to a computer program product comprising a computer readable program medium code stored thereon, which code, when executed by a processor, causes the processor to implement a wireless communication method as recited in any of the preceding methods.

[0056] The exemplary embodiments disclosed herein are intended to provide features that will become apparent to those skilled in the art upon consideration of the following description and the accompanying drawings. According to various embodiments, exemplary systems, methods, devices, and computer program products are disclosed herein. However, it should be understood that these embodiments are presented by way of example and not limitation, and that various modifications can be made by those skilled in the art upon reading the present disclosure, while still remaining within the scope of the present disclosure.

[0057] Accordingly, the present disclosure is not limited to the exemplary embodiments and applications described and illustrated herein. Moreover, the particular sequence of steps or order of steps described and illustrated herein are merely exemplary. Based on the disclosure provided herein, a person of ordinary skill in the art will appreciate that steps of the disclosed methods or processes can be rearranged, modified, or combined, while still remaining within the scope of the present disclosure. Accordingly, the methods and techniques disclosed herein are presented for exemplary purposes only and are not limiting to the scope of the present disclosure.

[0058] The above and other aspects and implementations thereof are described in more detail in the accompanying drawings, description, and claims.

[0059] Figure 1 An example of a wireless communication method according to embodiments of the disclosure is shown.

[0060] Figure 2 An example of a wireless communication method according to embodiments of the disclosure is shown.

[0061] Figure 3 An example of a wireless communication method according to embodiments of the disclosure is shown.

[0062] Figure 4 An example of a schematic diagram of a wireless communication terminal according to embodiments of the disclosure is shown.

[0063] Figure 5 An example of a schematic diagram of a wireless communication node according to embodiments of the disclosure is shown.

[0064] Figure 6 And Figure 7 A flowchart of a wireless communication method according to some embodiments of the disclosure is shown.

[0065] In some embodiments, large bandwidth and multiple antennas are used in 5G communication systems, which results in significant power consumption due to a large number of spatial elements.

[0066] In some embodiments, to reduce the power consumption of a gNB (gNodeB), one possible method is to reduce the number of antennas or antenna ports. If the number of antennas changes, the channel can also change. To help the gNB obtain the channel state of different numbers of antennas, multiple CSIs with different adaptation modes are needed. Multiple CSIs with different adaptation modes can be obtained through a specific CSI reporting configuration type.

[0067] However, if the user equipment (UE) always needs to report multiple CSI reports, the overhead can be large. To reduce the UL signaling overhead, some embodiments of the present disclosure described below can be used.

[0068] In some embodiments, a user equipment (UE) can be configured with one or more CSI (channel state information) reporting configurations. Each CSI reporting configuration is configured by CSI-ReportConfig signaling. A CSI-ReportConfig can be associated with one CSI-RS resource setting by CSI-resourceConfigID for channel measurement. The CSI-RS resource setting is configured by CSI-ResourceConfig signaling.

[0069] The number of ports of a CSI-RS is configured by nrofPorts (e.g., indicating the number of ports) in CSI-ResourceMapping, and the CSI-ResourceMapping is associated with NZP-CSI-RS-Resource. The NZP-CSI-RS-Resource is associated with NZP-CSI-RS-ResourceSet. The NZP-CSI-RS-ResourceSet is associated with CSI-ResourceConfig. The CSI-ResourceConfig is associated with CSI-ReportConfig. The nrofPorts can be one of: pl, p2, p4, p8, pl2, pl6, p24, or p32, pl means the number of ports is 1, p2 means the number of ports is 2, and so on.

[0070] In one embodiment, a method is provided, comprising receiving, at a UE side, RRC (radio resource control) signaling, the RRC signaling comprising one or more CSI reporting configurations, the CSI reporting configuration being associated with a CSI-RS resource setting, wherein the CSI-RS resource setting comprises one or more CSI-RS resources associated with more than one adaptation pattern (also referred to as spatial pattern in the present disclosure). The method further comprises performing CSI reporting according to the CSI reporting configuration.

[0071] In some embodiments, the adaptation pattern comprises at least one of: the number of ports, port index indication, group indication, power offset, index (e.g., CRI (CSI-RS resource indicator), resource set ID, resource setting ID), TCI (transmission configuration indicator), CDM (code division multiplexing), resource mapping, CDM group index, frequency domain resource, time domain resource, sub-configuration, group index. In the present disclosure, the expression adaptation pattern different means one or more of the adaptation patterns are different.

[0072] In some embodiments, the power offset corresponds to powerControlOffset or powerControlOffsetSS, and the number of ports represents the number of CSI-RS ports.

[0073] In some embodiments, the powerControlOffset is an assumed ratio of PDSCH (Physical Downlink Shared Channel) EPRE (Energy Per Resource Element) to NZP (Non-Zero Power) CSI-RS EPRE when the UE obtains CSI feedback. The powerControlOffset has a range of [-8, 15] dB with a step size of 1 dB.

[0074] In some embodiments, the powerControlOffsetSS is an assumed ratio of NZP (Non-Zero Power) CSI-RS EPRE to SS / PBCH block EPRE (Energy Per Resource Element).

[0075] In some embodiments, the CSI report configuration corresponds to CSI-ReportConfig configured by RRC signaling.

[0076] In some embodiments, the sub-configuration includes at least one of the following: port subset indication, codebook configuration parameter set, group identity, group ID, power offset, resource indication, reporting quantity, index, and / or reportFreqConfiguration.

[0077] In some embodiments, each sub-configuration is associated with one adaptation mode.

[0078] In one embodiment, the CSI report configuration is associated with L adaptation modes. For the CSI report configuration, the UE reports N CSI in one reporting occasion, where 1≤N≤L, N and L are integers less than 7. The N CSI is generated or calculated according to N adaptation modes out of the L adaptation modes.

[0079] In some cases, the N CSI is reported without overhead reduction, and in other cases, the N CSI is reported with reduced overhead.

[0080] In some embodiments, the CSI report without overhead reduction is a first CSI reporting mode.

[0081] In some embodiments, the CSI report with reduced overhead is a second CSI reporting mode.

[0082] In some embodiments, the CSI reporting configuration being associated with L adaptation modes means that L sub-configurations are configured in the CSI reporting configuration. In some embodiments, the CSI reporting configuration being associated with L adaptation modes means that L adaptation modes are configured in the CSI-RS resource setting associated with the CSI reporting configuration.

[0083] In some embodiments, the reporting of N CSI without overhead reduction means that all CSI quantities for each spatial mode are reported independently. For example, if the CSI quantities for each spatial mode include CRI (CSI-RS Resource Indicator), RI (Rank Indicator), PMI (Precoding Matrix Indicator), CQI (Channel Quality Indicator), the UE reporting N CSI means that the UE reports N sets of CRI, RI, PMI and / or CQI, where each set of CRI, RI, PMI and / or CQI is associated with an adaptation mode.

[0084] In some embodiments, the reporting of N CSI with overhead reduction means that a scheme to compress the CSI overhead is used, for example, a common CRI, RI, PMI, CQI and / or L1-RSRP (Reference Signal Received Power) is used, or a differential / threshold based RI, CQI and / or L1-RSRP is used, or a jointly coded RI is used. For example, if the CSI quantities for each adaptation mode include CRI, RI, PMI, CQI, the UE reports one common CRI, one common PMI and one RI, one CQI, (N-1) differential RIs, (N-1) different CQIs. In this configuration, the signaling overhead is reduced.

[0085] In some embodiments, the processing for the reporting of N CSI with overhead reduction and the processing for the reporting of N CSI without overhead reduction are different. The UE and the gNB need to know when the UE reports N CSI with overhead reduction and when the UE reports N CSI without overhead reduction.

[0086] In some embodiments, the determination of the CSI reporting mode (for example, the determination between the CSI reporting with overhead reduction and the CSI reporting without overhead reduction, or the determination between the first CSI reporting mode and the second CSI reporting mode) depends on at least one of the following factors:

[0087] The CSI reporting type. For example, the CSI reporting type includes an aperiodic CSI reporting, a semi-persistent CSI reporting or a periodic CSI reporting.

[0088] The CSI reporting activation and / or triggering signaling.

[0089] A number of sets of one or more codebook configuration parameters.

[0090] Information in the indication signaling of the CSI reporting mode. In some embodiments, the indication is at least one of downlink control information, MAC CE, RRC signaling.

[0091] The value of N and / or L.

[0092] The number of occupied or unoccupied CPUs (CSI processing units).

[0093] CSI reporting configuration.

[0094] UE capability.

[0095] Codebook type. For example, the codebook type includes a type 1 codebook or a type 2 codebook.

[0096] TRP type. For example, the codebook type includes a single-TRP type or a multi-TRP type.

[0097] Channel type for transmitting the CSI report. For example, the channel type includes a physical uplink shared channel or a physical uplink control channel.

[0098] In some embodiments, the UE reports N CSI without overhead reduction if a first condition is satisfied.

[0099] In some embodiments, the first condition includes at least one of:

[0100] The CSI reporting configuration of the N CSI is an aperiodic CSI reporting;

[0101] The CSI reporting configuration is activated and / or triggered by DCI (downlink control information);

[0102] The CSI reporting configuration is configured with more than one set of codebook configuration parameters;

[0103] A DCI or MAC CE (medium access control control element) indicating to report CSI without overhead reduction is received;

[0104] The UE does not support reporting CSI with reduced overhead;

[0105] receiving an RRC indicating to report CSI without overhead reduction;

[0106] N = 1;

[0107] the CSI report configuration is associated with a specific resource setting;

[0108] the CSI report configuration comprises a specific configuration; and / or

[0109] a number of unoccupied CPUs (CSI processing units) is greater than or equal to a second threshold, wherein at least one of the following applies:

[0110] the second threshold is a predefined value, or is a number of CPUs occupied by N CSI without overhead reduction. In some embodiments, if the UE supports N CPU simultaneous CSI computation, the UE has N CPU CSI processing units for processing CSI reports. If in a given OFDM symbol, L CPUs are occupied for computing CSI reports, the UE has N CPU - L unoccupied CPUs;

[0111] the second threshold is configured by RRC signaling; and / or

[0112] the second threshold is associated with a UE capability.

[0113] In some embodiments, if the first condition is not satisfied, the UE reports N CSI with overhead reduction.

[0114] In some embodiments, if the second condition is satisfied, the UE reports N CSI with overhead reduction.

[0115] In some embodiments, the second condition comprises at least one of:

[0116] N is greater than 1;

[0117] N is greater than a threshold, the threshold being an integer greater than 1 and less than or equal to L, wherein in some embodiments, the threshold is predefined or configured by higher layer signaling;

[0118] receiving a DCI or a MAC CE indicating to report CSI with overhead reduction;

[0119] receiving an RRC indicating a CSI reporting reduction;

[0120] N = L;

[0121] The CSI report configuration is associated with a specific resource setting, wherein the specific resource setting comprises at least one of:

[0122] The resource setting comprises a resource set comprising only one resource;

[0123] The resource setting comprises a resource set comprising resources configured with a same number of ports;

[0124] All resources in the resource setting are configured with a same number of ports;

[0125] The resource setting comprises resources, each of which is configured with a group index or an adaptation mode;

[0126] The resource setting comprises more than one resource set, each of which is associated with an adaptation mode;

[0127] The resource setting comprises resources configured with a same time and frequency resource;

[0128] The resource setting comprises resources with more than one adaptation mode;

[0129] The resource setting comprises resources with more than one adaptation mode and more than one resource configured with a same time and frequency resource;

[0130] The CSI report configuration comprises a specific configuration, wherein the specific configuration comprises at least one of:

[0131] One or more port subsets indication;

[0132] Only one codebookConfig;

[0133] Only one codebook configuration parameter set;

[0134] Only one CSI report quantity;

[0135] One or more sub-configuration;

[0136] more than one RI restriction;

[0137] more than one codebook subset restriction;

[0138] more than one of N1, N2, or Ng, where N1 and N2 are associated with a number of antenna ports in first and second directions (e.g., horizontal and vertical directions of an antenna array), and Ng is a number of antenna panels;

[0139] more than one CSI reporting quantity;

[0140] more than one reportFreqConfiguration; and / or

[0141] more than one codebook type; and / or

[0142] a number of unoccupied CPUs is less than a second threshold.

[0143] In some embodiments, one codebook configuration parameter set includes at least one of the following parameters: codebook configuration, codebook subset restriction, RI restriction, n1, n2, or ng.

[0144] In some embodiments, if the second condition is not satisfied, the UE reports N CSI without overhead reduction.

[0145] In some embodiments, every M reporting reports N CSI without overhead reduction. For example, for a CSI reporting configuration, if it is activated or triggered, N CSI without overhead reduction is reported at a first reporting occasion, and is reported once every M reporting occasions, and N CSI with reduced overhead is reported at other reporting occasions.

[0146] In some embodiments, M is predefined or configured by RRC signaling.

[0147] In some embodiments, M is associated with a UE capability.

[0148] In some embodiments, M is indicated by DCI or MAC CE.

[0149] Figure 1 An example of N CSI reporting with reduced overhead and without overhead reduction according to embodiments of the application is shown.

[0150] In some embodiments, the N CSI with reduced overhead is reported if the UE does not receive an indication to report the N CSI without overhead reduction.

[0151] In some embodiments, the N CSI without overhead reduction is reported if the first condition is satisfied and the UE does not receive an indication to report the N CSI with reduced overhead / no overhead reduction. The UE follows the indication if the UE receives an indication to report the N CSI with reduced overhead / no overhead reduction.

[0152] In some embodiments, the N CSI with reduced overhead is reported if the second condition is satisfied and the UE does not receive an indication to report the N CSI with reduced overhead / no overhead reduction. The UE follows the indication if the UE receives an indication to report the N CSI with reduced overhead / no overhead reduction.

[0153] In some embodiments, the number of CPUs occupied by the reporting of the N CSI without overhead reduction and the number of CPUs occupied by the reporting of the N CSI with reduced overhead are different.

[0154] In one embodiment, the CSI reporting configuration is configured for semi-persistent CSI reporting or aperiodic CSI reporting. For example, the semi-persistent CSI reporting is a CSI reporting configuration configured with semiPersistentOnPUSCH or semiPersistentOnPUCCH. For example, the aperiodic CSI reporting is a CSI reporting configuration configured with aperiodic (high layer parameter). The UE reports the N CSI in one reporting occasion of the CSI reporting configuration.

[0155] In some embodiments, the CSI reporting configuration configured for semi-persistent CSI reporting or aperiodic CSI reporting is not associated with a periodic CSI-RS resource setting if the UE reports the N CSI in one reporting occasion of the CSI reporting configuration.

[0156] In some embodiments, the CSI reporting configuration is associated with a semi-persistent CSI resource setting. The UE reports the N CSI in one reporting occasion of the CSI reporting configuration.

[0157] In some embodiments, a CSI resource setting in the semi-persistent CSI resource setting associated with the CSI reporting configuration is activated or triggered before the semi-persistent CSI reporting configuration is activated or triggered. For example, a MAC CE can be used to activate and / or trigger the CSI resource set.

[0158] In some embodiments, the MAC CE indicates and / or activates N adaptation modes in the resource set.

[0159] For example, the resource set includes resources with more than one adaptation mode, and the MAC CE indicates and / or activates N adaptation modes according to a bitmap indication. Each bit in the bitmap is associated with one adaptation mode, one state of the bit (e.g., “0”) indicates that the adaptation mode is not indicated, and another state of the bit (e.g., “1”) indicates that the adaptation mode is indicated.

[0160] For another example, the resources in the resource set are divided into different groups, and the MAC CE indicates and / or activates N groups. In another example, each resource is associated with a group index.

[0161] In some embodiments, the indication can be according to a bitmap. Each bit in the bitmap is associated with one group, one state of the bit (e.g., “0”) indicates that the group is not indicated, and another state of the bit (e.g., “1”) indicates that the group is indicated.

[0162] For example, the MAC CE indicates and / or activates multiple resources. The multiple resources are associated with N adaptation modes. The indication can be according to a bitmap. Each bit in the bitmap is associated with one resource, one state of the bit (e.g., “0”) indicates that the resource is not indicated, and another state of the bit (e.g., “1”) indicates that the resource is indicated.

[0163] For example, the MAC CE indicates and / or activates N or N-1 port subset indications or sub-configurations. The indication can be according to a bitmap. Each bit in the bitmap is associated with a port subset indication or sub-configuration, one state of the bit (e.g., “0”) indicates that the port subset is indicated or the sub-configuration is not indicated, and another state of the bit (e.g., “1”) indicates that the port subset indication or sub-configuration is indicated.

[0164] In some embodiments, the MAC CE indicates the value of N.

[0165] In some embodiments, if the UE receives a first MAC CE indicating / triggering a resource set and indicating / triggering a first resource or a first adaptation mode, the UE does not expect to receive a second MAC CE indicating and / or triggering the same resource set and indicating / triggering a second resource or a second adaptation mode before the resource set with the first resource or the first adaptation mode is deactivated.

[0166] In some embodiments, the first resource is associated with a different group index than the second resource.

[0167] In some embodiments, the first resource is in a different group than the second resource.

[0168] In some embodiments, the first resource is associated with a different spatial mode than the second resource.

[0169] In some embodiments, after the UE receives a first MAC CE indicating and / or triggering a resource set and indicating / triggering a first resource or a first adaptation mode, if the UE receives a second MAC CE indicating and / or triggering the same resource set and indicating / triggering a second resource or a second adaptation mode, the first resource or the first adaptation mode is deactivated and the second resource or the second adaptation mode is activated (advantageously, the gNB does not need to send signaling to deactivate the first resource).

[0170] In some embodiments, after the UE receives a first MAC CE indicating and / or triggering a resource set and indicating / triggering a first resource or a first adaptation mode, if the UE receives a second MAC CE indicating and / or triggering the same resource set and indicating / triggering a second resource or a second adaptation mode, the first resource or the first adaptation mode is activated and the second resource or the second adaptation mode is activated.

[0171] In some embodiments, after the UE receives a first MAC CE indicating and / or triggering a resource set and indicating / triggering a first resource or a first adaptation mode, if the UE receives a second MAC CE indicating and / or triggering the same resource set and indicating / triggering a second resource or a second adaptation mode, the second resource or the second adaptation mode is activated.

[0172] In some embodiments, a MAC CE deactivates N adaptation modes in a resource set. The method of indicating and / or activating N adaptation modes can be reused for deactivation indication. The difference is that a MAC CE is used to deactivate N adaptation modes.

[0173] In some embodiments, the resource setting includes multiple resource sets, where each resource set is associated with a different adaptation mode.

[0174] In some embodiments, the UE only measures and reports CSI for the indicated / activated resource or adaptation mode.

[0175] In some embodiments, the CSI reporting configuration is activated and / or triggered by DCI.

[0176] In some embodiments, the DCI indicates one or more trigger states, where each trigger state is associated with one CSI reporting configuration and N sub-configurations or adaptation modes. The trigger state is indicated in a field of the DCI.

[0177] In some embodiments, if the UE receives a first DCI triggering a CSI reporting configuration with a first trigger state, the UE can receive a second DCI triggering the same CSI reporting configuration with a second trigger state, where the sub-configuration or adaptation mode associated with the first trigger state is different from the sub-configuration or adaptation mode associated with the second trigger state.

[0178] In some embodiments, if the UE receives a first DCI triggering a CSI reporting configuration in a first triggering state, the UE does not expect to receive a second DCI triggering the same CSI reporting configuration in a second triggering state, where the sub-configuration or adaptation mode associated with the first triggering state is the same as the sub-configuration or adaptation mode associated with the second triggering state, or the first triggering state is the same as the second triggering state.

[0179] In some embodiments, the DCI indicates a triggering state and N sub- configurations or adaptation modes. One field in the DCI indicates the triggering state, and another field in the DCI indicates the N sub-configurations or adaptation modes.

[0180] In some embodiments, the N sub-configurations or adaptation modes are indicated in a field of the DCI. The N sub-configurations or adaptation modes are indicated by a bitmap. Each bit in the bitmap is associated with one sub-configuration or adaptation mode. A value of ‘0’ indicates that the sub-configuration or adaptation mode is not indicated, and a value of ‘1’ indicates that the sub-configuration or adaptation mode is indicated.

[0181] In some embodiments, if the UE receives a first DCI triggering a CSI reporting configuration in a first triggering state and N1 sub-configurations or adaptation modes, the UE can receive a second DCI triggering the same CSI reporting configuration in the same triggering state and N2 sub-configurations or adaptation modes, where the N1 sub-configurations or adaptation modes are different from the N2 sub-configurations or adaptation modes.

[0182] In some embodiments, if the UE receives a first DCI triggering a CSI reporting configuration in a first triggering state and N1 sub-configurations or adaptation modes, the UE does not expect to receive a second DCI triggering the same CSI reporting configuration in the same triggering state and N2 sub-configurations or adaptation modes, where the N1 sub-configurations or adaptation modes are the same as the N2 sub-configurations or adaptation modes.

[0183] In some embodiments, if a CSI reporting configuration is triggered by different DCIs with different sub-configurations or adaptation modes, the UE reports CSI for all sub-configurations or adaptation modes in the same reporting occasion. In other words, the indicated and / or triggered sub-configurations or adaptation modes are activated until the UE receives deactivation signaling.

[0184] In some embodiments, if the UE receives a first DCI triggering a CSI reporting configuration with N1 sub-configurations or adaptation modes, and after the first DCI, the UE receives a second DCI triggering the same CSI reporting configuration with N2 sub-configurations or adaptation modes, the CSI reporting configuration with N1 sub-configurations or adaptation modes is deactivated, and the CSI reporting configuration with N2 sub-configurations or adaptation modes is activated. In other words, the UE reports CSI according to N2 sub-configurations or adaptation modes. (Advantageously, the gNB does not need to send signaling to deactivate the CSI reporting configuration with N1 sub-configurations or adaptation modes).

[0185] Figure 2 An example of CSI reporting configuration is shown according to embodiments of the application.

[0186] In some embodiments, if the CSI reporting configuration is triggered by different DCIs with different sub-configurations or adaptation modes, the UE reports CSI according to the sub-configuration or adaptation mode triggered by the latest DCI.

[0187] In some embodiments, a DCI triggers a CSI reporting configuration and N sub-configurations or adaptation modes. The DCI also indicates time and frequency resources of a PUSCH occasion to report N CSIs associated with the N sub-configurations or adaptation modes.

[0188] In some embodiments, the UE receives a first DCI triggering a CSI reporting configuration and N1 sub-configurations or adaptation modes and a first time / frequency resource. Further, if the UE receives a second DCI triggering the same CSI reporting configuration and N2 sub-configurations or adaptation modes and a second time / frequency resource, the UE reports N1 CSIs corresponding to N1 sub-configurations or adaptation modes in the occasion according to the first time / frequency resource and N2 CSIs corresponding to N2 sub-configurations or adaptation modes in the occasion according to the second time / frequency resource.

[0189] In some embodiments, the UE receives a first DCI triggering a CSI reporting configuration and N1 sub-configurations or adaptation modes and a first time / frequency resource. Further, if the UE receives a second DCI triggering the same CSI reporting configuration and N2 sub-configurations or adaptation modes and the first time / frequency resource, the UE reports N2 CSIs corresponding to N2 sub-configurations or adaptation modes in the occasion according to the first time / frequency resource. The UE does not report N1 CSIs corresponding to N1 sub-configurations or adaptation modes in the occasion according to the first time / frequency resource. In other words, N1 sub-configurations or adaptation modes are deactivated.

[0190] In some embodiments, the UE receives a DCI triggering a CSI reporting configuration and / or N1 sub-configurations or adaptation patterns, including one of: the UE receives a DCI, one field indicates a triggering state, the triggering state is associated with the CSI reporting configuration and the N1 sub-configurations or adaptation patterns; the UE receives a DCI, one field indicates a triggering state, the triggering state is associated with the CSI reporting configuration, another field indicates the N1 sub-configurations or adaptation patterns.

[0191] In some embodiments, the UE receives a first DCI triggering a CSI reporting configuration and N1 sub-configurations or adaptation patterns and a first time / frequency resource. In addition, if the UE receives a second DCI triggering the same CSI reporting configuration and N2 sub-configurations or adaptation patterns and a second time / frequency resource, the UE reports N2 CSIs corresponding to the N2 sub-configurations or adaptation patterns in the occasion according to the second time / frequency resource. The UE does not report N1 CSIs corresponding to the N1 sub-configurations or adaptation patterns in the occasion according to the first time / frequency resource. In other words, the N1 sub-configurations or adaptation patterns are deactivated.

[0192] In some embodiments, the DCI is scrambled by SP-CSI-RNTI. In some embodiments, the DCI is scrambled by C-RNTI.

[0193] In some embodiments, the DCI scrambled by SP-CSI-RNTI is used to trigger a semi-persistent CSI reporting and / or is used to indicate and / or trigger N sub-configurations or adaptation patterns. The DCI includes one “CSI request” field used to indicate a triggering state. The triggering state is associated with a CSI reporting configuration. In addition, another field is used to indicate N sub-configurations configured in the CSI reporting.

[0194] In some embodiments, the DCI scrambled by SP-CSI-RNTI is used to trigger a semi-persistent CSI reporting and / or is used to indicate and / or trigger N sub-configurations or adaptation patterns. The DCI includes one “CSI request” field used to indicate a triggering state. The triggering state is associated with a CSI reporting configuration and the N sub-configurations or adaptation patterns.

[0195] In some embodiments, the DCI scrambled by C-RNTI is used to trigger an aperiodic CSI reporting and / or is used to indicate and / or trigger N sub-configurations or adaptation patterns. The DCI includes one “CSI request” field used to indicate a triggering state. In addition, another field is used to indicate N sub-configurations or adaptation patterns configured in the CSI reporting.

[0196] In some embodiments, the DCI scrambled with C-RNTI is used to trigger aperiodic CSI reporting and / or is used to indicate and / or trigger N sub- configurations or adaptation patterns. The DCI includes a "CSI request" field used to indicate a trigger state. The trigger state is associated with a CSI reporting configuration and N sub- configurations or adaptation patterns.

[0197] In some embodiments, the CSI reporting configuration is activated and / or triggered by a MAC CE.

[0198] In some embodiments, the CSI reporting configuration is associated with a semi-persistent CSI-RS resource setting. A resource / or adaptation pattern in the resource set of the semi-persistent CSI-RS resource setting is triggered and / or indicated by a first MAC CE, and the CSI reporting configuration is activated by a second MAC CE. The CSI reporting configuration is implicitly deactivated if the UE receives a third MAC CE triggering and / or indicating another resource / or adaptation pattern. The UE reports CSI according to the resource / or adaptation pattern indicated by the third MAC CE only if the UE receives a fourth MAC CE indicating and / or triggering the CSI reporting configuration.

[0199] In some embodiments, the MAC CE triggering the CSI reporting configuration also indicates N sub- configurations or adaptation patterns.

[0200] In some embodiments, for a MAC CE, S0 refers to a PUCCH resource included in the indicated BWP for SP (semi-persistent) CSI reporting and has the lowest CSI-ReportConfigld in the list whose type is set to semiPersistentOnPUCCH, S1 refers to a PUCCH resource included in the indicated BWP for SP CSI reporting and has the second lowest CSI-ReportConfigld, and so on. i The field is set to 1 to indicate that the corresponding semi-persistent CSI reporting configuration can be activated. i The field is set to 0 to indicate that the corresponding semi-persistent CSI reporting configuration can be deactivated.

[0201] Sub0 refers to a sub- configuration or adaptation pattern, which is the first sub- configuration in the CSI reporting configuration or the first adaptation pattern. Sub1 refers to a sub- configuration or adaptation pattern, which is the second sub- configuration in the CSI reporting configuration or the second adaptation pattern, and so on. i The field is set to 1 to indicate that the corresponding sub- configuration or adaptation pattern is indicated. i The field is set to 0 to indicate that the corresponding sub- configuration or adaptation pattern is not indicated.

[0202] Figure 3 A MAC CE for semi-persistent CSI according to embodiments of the application is shown.

[0203] In some embodiments, a field of DCI or MAC CE is used to deactivate CSI reporting configurations with N sub-configuration or adaptation patterns. The method of indicating and / or activating and / or triggering CSI reporting configurations with N sub-configuration or adaptation patterns can be reused.

[0204] In some embodiments, the sub-configuration or adaptation pattern indication and / or activation indicated by DCI or MAC CE can be applied to periodic CSI reporting, semi-persistent CSI reporting and aperiodic CSI reporting.

[0205] In some embodiments, a first DCI is used to indicate N sub-configuration or adaptation patterns for aperiodic CSI reporting. A second DCI is used to indicate N sub-configuration or adaptation patterns for semi-persistent CSI reporting on PUSCH. A MAC CE is used to indicate N sub-configuration or adaptation patterns for semi-persistent CSI reporting on PUCCH.

[0206] In some embodiments, a first DCI is used to indicate N sub-configuration or adaptation patterns for aperiodic CSI reporting. A second DCI is used to indicate N sub-configuration or adaptation patterns for semi-persistent CSI reporting and periodic CSI reporting on PUSCH. A MAC CE is used to indicate N sub-configuration or adaptation patterns for semi-persistent CSI reporting and periodic CSI reporting on PUCCH.

[0207] In some embodiments, a first DCI is used to indicate N sub-configuration or adaptation patterns for aperiodic CSI reporting and periodic CSI reporting. A second DCI is used to indicate N sub-configuration or adaptation patterns for semi-persistent CSI reporting and periodic CSI reporting on PUSCH. A MAC CE is used to indicate N sub-configuration or adaptation patterns for semi-persistent CSI reporting and periodic CSI reporting on PUCCH.

[0208] In some embodiments, a first DCI is used to indicate N sub-configuration or adaptation patterns for aperiodic CSI. A MAC CE is used to indicate N sub-configuration or adaptation patterns for semi-persistent CSI reporting and periodic CSI on PUCCH. A second DCI is used to indicate N sub-configuration or adaptation patterns for semi-persistent CSI reporting on PUSCH.

[0209] In some embodiments, the first DCI is used to indicate N sub- configurations or adaptation modes for aperiodic CSI. The MAC CE is used to indicate N sub- configurations or adaptation modes for semi-persistent CSI reporting on PUCCH. The second DCI is used to indicate N sub- configurations or adaptation modes for semi-persistent CSI reporting on PUSCH and periodic CSI.

[0210] In one embodiment, the CSI reporting configuration is configured with K semiPersistentOnPUSCH and L sub-configurations.

[0211] Each semiPersistentOnPUSCH is associated with one or more sub- configurations. CSI for the one or more sub-configurations is reported according to the corresponding semiPersistentOnPUSCH.

[0212] In some embodiments, the CSI reported according to the particular semiPersistentOnPUSCH is reported without overhead reduction.

[0213] In some embodiments, the particular semiPersistentOnPUSCH is predefined or configured by RRC signaling. For example, the semiPersistentOnPUSCH is the first or the lowest indexed semiPersistentOnPUSCH configured in the CSI reporting configuration.

[0214] In some embodiments, the CSI reported according to the particular semiPersistentOnPUSCH is reported with overhead reduction.

[0215] In some embodiments, the particular semiPersistentOnPUSCH is predefined or configured by RRC signaling. For example, the semiPersistentOnPUSCH is the first or the lowest indexed semiPersistentOnPUSCH configured in the CSI reporting configuration.

[0216] In some embodiments, the periodic (configured by reportSlotConfig) in each semiPersistentOnPUSCH is the same.

[0217] In one embodiment, the CSI reporting configuration is configured with K semiPersistentOnPUCCH or K periodic or K reportSlotConfig or K pucch-CSI-ResourceList and L sub-configurations.

[0218] In some embodiments, each semiPersistentOnPUCCH or each periodic includes one reportSlotConfig and one pucch-CSI-ResourceList. The reportSlotConfig indicates periodicity.

[0219] In some embodiments, each semiPersistentOnPUCCH or periodic or reportSlotConfig or pucch-CSI-ResourceList is associated with one or more sub- configurations. CSI for the one or more sub-configurations is reported according to the corresponding resource.

[0220] In some embodiments, the CSI reported according to the particular semiPersistentOnPUCCH or periodic or pucch-CSI-ResourceList is reported with reduced overhead.

[0221] In some embodiments, the particular semiPersistentOnPUCCH or periodic or pucch-CSI-ResourceList is predefined or configured by RRC signaling. For example, the semiPersistentOnPUCCH or periodic or pucch-CSI-ResourceList is the first or has the lowest index semiPersistentOnPUCCH or periodic or pucch-CSI-ResourceList configured in the CSI reporting configuration.

[0222] In some embodiments, the CSI reported according to the particular semiPersistentOnPUCCH or periodic or pucch-CSI-ResourceList is reported with reduced overhead.

[0223] In some embodiments, the particular semiPersistentOnPUCCH or reportSlotConfig or pucch-CSI-ResourceList is predefined or configured by RRC signaling. For example, the semiPersistentOnPUCCH or reportSlotConfig or pucch-CSI-ResourceList is the first or has the lowest index semiPersistentOnPUCCH or reportSlotConfig or pucch-CSI-ResourceList configured in the CSI reporting configuration.

[0224] In some embodiments, the periodic (configured by reportSlotConfig) is the same in each semiPersistentOnPUCCH or periodic.

[0225] In some embodiments, the PUCCH resource (configured by pucch-CSI-ResourceList) is different in each semiPersistentOnPUCCH or periodic.

[0226] In one embodiment, a CSI reporting configuration is configured with K semiPersistentOnPUSCH, semiPersistentOnPUCCH, periodic, reportSlotConfig, or pucch-CSI-ResourceList. The CSI reporting configuration is also configured with L sub-configurations. A DCI or MAC CE triggering the CSI reporting configuration can also indicate one or more semiPersistentOnPUSCH, semiPersistentOnPUCCH, periodic, reportSlotConfig, and / or pucch-CSI-ResourceList. The UE reports CSI according to the sub-configuration associated with the indicated one or more semiPersistentOnPUSCH, semiPersistentOnPUCCH, periodic, reportSlotConfig, and / or pucch-CSI-ResourceList.

[0227] Differential CQI

[0228] Example 1

[0229] In one embodiment, the UE reports N CSI with reduced overhead. The N CSI with reduced overhead includes at least a first differential CQI. The UE reports the first differential CQI according to a codepoint.

[0230] In one embodiment, the first differential CQI indicates a quantized offset value. The offset value indicates an offset between a first wideband CQI index and a second wideband CQI index. The quantization method is predefined or configured by higher layer signaling. The first wideband CQI index is a wideband CQI index for a first sub-configuration or a first adaptation mode. The second wideband CQI index is a wideband CQI index for a second sub-configuration or a second adaptation mode.

[0231] For example, the offset value = second wideband CQI index - first wideband CQI index.

[0232] Table 1 (Example 1)

[0233]

[0234] Table 2 (Example 2)

[0235]

[0236] X is a value greater than 0 and less than 7 (e.g., X = 1, 2, 3, or 4). In some embodiments, X is a predefined value. In some embodiments, X is configured by higher layer signaling. In some embodiments, X is a different value for different sub- configurations or adaptation modes. In some embodiments, a sub-configuration or adaptation mode is associated with X.

[0237] In some embodiments, the reported second wideband CQI index is determined by the first differential CQI and the first wideband CQI index.

[0238] In some embodiments, the reported second wideband CQI index = the first wideband CQI index + the first differential CQI value (i.e., quantized value).

[0239] In some embodiments, the reported second subband CQI index is determined by the first differential CQI and the first subband CQI index.

[0240] In some embodiments, the reported second subband CQI index = the first subband CQI index + the first differential CQI value (i.e., quantized value).

[0241] Example 2

[0242] In some embodiments, the first differential CQI indicates an offset value. The offset value indicates an offset between the first wideband CQI index and the second wideband CQI index. The first wideband CQI index is a wideband CQI index for a first sub-configuration or a first adaptation mode. The second wideband CQI index is a wideband CQI index for a second sub-configuration or a second adaptation mode.

[0243] For example, the offset value = the second wideband CQI index - the first wideband CQI index.

[0244] Table 3 (Example 3)

[0245]

[0246] Table 4 (Example 4)

[0247]

[0248] X1, X2, and X3 are values less than 0 and greater than -7 (e.g., X1 = -1, X2 = -2, X3 = -3). In some embodiments, X1, X2, and X3 are predefined values. In some embodiments, X1, X2, and X3 are configured by higher layer signaling. In some embodiments, X1, X2, and X3 have different values for different sub- configurations or adaptation modes. In some embodiments, X1, X2, and / or X3 are associated with a sub-configuration or adaptation mode. In some embodiments, a sub-configuration or adaptation mode is associated with a set of X1, X2, and X3.

[0249] Table 5 (Example 5)

[0250]

[0251] Example 3

[0252] In some embodiments, the reduced overhead N CSI is reported by the UE. The reduced overhead N CSI includes at least the second differential CQI. The second differential CQI is reported by the UE according to a codepoint.

[0253] In some embodiments, the second differential CQI indicates a quantized offset value. The offset value indicates an offset between a wideband CQI index and a second subband CQI index. In some embodiments, the offset value indicates an offset between a first subband CQI index and a second subband CQI index. The first subband CQI index is a subband CQI index for a first sub-configuration or a first adaptation mode. The second subband CQI index is a subband CQI index for a second sub-configuration or a second adaptation mode. The wideband CQI index can be a wideband CQI index for the first sub-configuration or the first adaptation mode. In some embodiments, the wideband CQI index can be a wideband CQI index for the second sub-configuration or the second adaptation mode. The quantization method is predefined or configured by higher layer signaling. For example,

[0254] the offset value = the second subband CQI index - the first wideband CQI index, or

[0255] the offset value = the second subband CQI index - the second wideband CQI index, or

[0256] the offset value = the second subband CQI index - the first subband CQI index.

[0257] Table 6 (Example 6)

[0258]

[0259] X is a value greater than 0 and less than 7 (e.g., X = 1, 2, 3, or 4). In some embodiments, X is a predefined value. In some embodiments, X is configured by higher layer signaling. In some embodiments, X can be different values for different sub- configurations or spatial modes. In some embodiments, a sub-configuration or adaptation mode is associated with a certain X.

[0260] Example 4

[0261] In some embodiments, the UE reports N CSI with reduced overhead. The N CSI with reduced overhead includes at least the second differential CQI. The UE reports the second differential CQI according to a codepoint.

[0262] In some embodiments, the second differential CQI indicates an offset value, which indicates an offset between a wideband CQI index and a second subband CQI index. In some embodiments, the offset value indicates an offset between a first subband CQI index and a second subband CQI index. The first subband CQI index is a subband CQI index for a first sub-configuration or a first adaptation mode. The second subband CQI index is a subband CQI index for a second sub-configuration or a second adaptation mode. The wideband CQI index can be a wideband CQI index for the first sub-configuration or the first adaptation mode. In some embodiments, the wideband CQI index can be a wideband CQI index for the second sub-configuration or the second adaptation mode. For example,

[0263] the offset value = the second subband CQI index - the first wideband CQI index, or

[0264] the offset value = the second subband CQI index - the second wideband CQI index, or

[0265] the offset value = one or more second subband CQI index - the first subband CQI index.

[0266] The offset value refers to the offset value of the s-th subband. The subband CQI index refers to the subband CQI index of the s-th subband.

[0267] Table 7 (Example 7)

[0268]

[0269] Table 8 (Example 8)

[0270]

[0271] Table 9 (Example 9)

[0272]

[0273] The first offset value = the second wideband CQI index - the first wideband CQI index.

[0274] Example 5

[0275] In some embodiments, the UE reports N CSI with reduced overhead. The N CSI with reduced overhead includes at least a third differential CQI.

[0276] The third differential CQI is a mean differential CQI value.

[0277] The third differential CQI = mean (first offset value, second offset value), where the mean is a mean function.

[0278] The first offset value = second wideband CQI index - first wideband CQI index.

[0279] The second offset value = second subband CQI index - first subband CQI index.

[0280] In some embodiments, the first wideband CQI index is a wideband CQI index for a first sub-configuration or a first adaptation mode. The first sub-configuration or the first adaptation mode is predefined or indicated by higher layer signaling. For example, the first sub-configuration or the first adaptation mode is a sub-configuration or an adaptation mode associated with a maximum number of ports or a lowest group ID or a lowest CRI or a smallest powerControlOffset or a largest powerControlOffsetSS. In some embodiments, the first sub-configuration or the first adaptation mode is a reference sub-configuration or adaptation mode.

[0281] In some embodiments, the second wideband CQI index is a wideband CQI index for a second sub-configuration or a second adaptation mode. The second sub-configuration or the second adaptation mode is other than the reference sub-configuration or adaptation mode.

[0282] In some embodiments, the first subband CQI index is a subband CQI index for a first sub-configuration or a first adaptation mode. The first sub-configuration or the first adaptation mode can be any sub-configuration or adaptation mode.

[0283] Differential RI

[0284] In some embodiments, the UE reports N CSI with reduced overhead. The N CSI with reduced overhead includes at least a common PMI and a worst layer indication (WLI). In some embodiments, the N CSI with reduced overhead includes at least a worst layer indication (WLI).

[0285] In some embodiments, the WLI indicates which column of the precoding matrix of the common PMI corresponds to the weakest layer of the codeword.

[0286] In some embodiments, the WLI indicates which column of the precoding matrix of the reported PMI corresponds to the weakest layer of the codeword, which corresponds to the largest / smallest reported wideband CQI. If two wideband CQIs are reported and have equal values, the WLI corresponds to the weakest layer of the first codeword.

[0287] In some embodiments, the WLI is indicated according to a codepoint in an information field. The length of the information field is based on the maximum rank supported. For example, if the maximum rank supported is U, the length of the information field is function(log2(U)), where function is a ceiling function, a floor function, or a function that keeps the original value. In some embodiments, the length of the information field is 2 bits. Each codepoint corresponds to a column of the precoding matrix of the common PMI. In some embodiments, the mapping between the codepoint and the column of the precoding matrix is predefined.

[0288] The following table shows an example.

[0289]

[0290] In some embodiments, the UE reports N CSI with reduced overhead. The N CSI with reduced overhead includes at least one RI, a common PMI, (N-1) differential RIs, and (N-1) worst layer indications (WLIs).

[0291] In some embodiments, the differential RI indicates an offset value between a first RI and a second RI. The first RI is the RI value of a first sub-configuration or a first adaptation mode. The second RI is the RI value of a second sub-configuration or a second adaptation mode.

[0292] In some embodiments, the differential RI = second RI - first RI.

[0293] In some embodiments, the differential RI is indicated in an information field. The length of the information field is 1 bit. In some embodiments, one state of the one bit represents that the offset value is 0, and another state of the one bit represents that the offset value is -1.

[0294] The following table shows an example.

[0295]

[0296] In some embodiments, the differential RI is indicated in an information field. The length of the information field is 1 bit. In some embodiments, one state of the one bit represents that the offset value is 0, and another state of the one bit represents that the offset value is less than or equal to -1.

[0297] The following table shows an example.

[0298]

[0299] In some embodiments, the differential RI is indicated in an information field. The length of the information field is 1 bit. In some embodiments, one state of the one bit represents that the offset value is greater than or equal to 0, and another state of the one bit represents that the offset value is less than or equal to -1.

[0300] The following shows one example.

[0301]

[0302] In some embodiments, a differential RI is associated with a WLI. If the differential RI indicates that the offset value is equal to 0, the corresponding WLI is not available. The WLI not available means that the WLI will not be used, or the WLI is a padding bit, or the WLI indicates that no column is indicated.

[0303] In some embodiments, if the differential RI indicates that the offset value is not equal to 0, the WLI indicates one column of the precoding matrix.

[0304] Higher layer configuration

[0305] Some higher layer configuration cases are described in some embodiments in this section.

[0306] In some embodiments, a CSI report configuration includes L sub-configurations. Only one sub-configuration includes a codebook configuration parameter set. In some embodiments, if the CSI report is activated, the UE reports N CSI (e.g., reports N PMI) with reduced overhead for the CSI report.

[0307] In some embodiments, a CSI report configuration includes L sub-configurations. Each sub-configuration includes a port subset indication or powerOffset. In some embodiments, if the CSI report is activated, the UE reports N CSI with reduced overhead for the CSI report.

[0308] In some embodiments, a CSI report configuration includes L sub-configurations. Each sub-configuration includes a port subset indication, a codebook configuration parameter set, or powerOffset. In some embodiments, if the CSI report is activated, the UE reports N CSI (e.g., reports N PMI) without overhead reduction for the CSI report.

[0309] In some embodiments, the codebook configuration parameter set can include at least one of the following: codebook configuration, codebook subset restriction, RI restriction, N1, N2, Ng, or codebook type.

[0310] In some embodiments, the CSI report configuration includes L sub-configurations. Each sub-configuration includes a group ID or a powerOffset. In some embodiments, if the CSI report is activated, the UE reports N CSI with reduced overhead for the CSI report.

[0311] In some embodiments, the CSI report configuration includes L sub-configurations. Each sub-configuration includes a group ID, a codebook configuration parameter, or a powerOffset. In some embodiments, if the CSI report is activated, the UE reports N CSI without overhead reduction (e.g., reports N PMI) for the CSI report.

[0312] In some embodiments, the CSI report configuration includes L sub-configurations. Each sub-configuration includes at least one of a group ID, a codebook configuration parameter, or a powerOffset. A CSI-RS resource setting is associated with the CSI report configuration. The CSI-RS resources in the CSI-RS resource setting are partitioned into more than one group. Each sub-configuration is associated with one group. In some embodiments, if the CSI report is activated, the UE reports N CSI without overhead reduction (e.g., reports N PMI) for the CSI report.

[0313] In some embodiments, the CSI report configuration includes L sub-configurations. Each sub-configuration includes a codebook configuration parameter or a powerOffset. A CSI-RS resource setting is associated with the CSI report configuration. The CSI-RS resources in the CSI-RS resource setting include more than one port number. Each sub-configuration is associated with one port number. In some embodiments, if the CSI report is activated, the UE reports N CSI without overhead reduction (e.g., reports N PMI) for the CSI report.

[0314] In some embodiments, the CSI report configuration includes a reference sub-configuration or an adaptation mode indication. The reference sub-configuration or the adaptation mode indication indicates that the PMI of the sub-configuration or the adaptation mode should be reported. In some embodiments, the sub-configuration or the adaptation mode with the lowest index or the first sub-configuration or the adaptation mode configured in the CSI report configuration is the reference sub-configuration or the adaptation mode. In some embodiments, the reference sub-configuration or the adaptation mode is predefined. In some embodiments, the reference sub-configuration or the adaptation mode is configured or indicated by the gNB. In some embodiments, the reference sub-configuration or the adaptation mode is configured or indicated by RRC signaling.

[0315] In some embodiments, the CSI report configuration does not include sub- configurations and is associated with a CSI-RS resource setting. Each CSI-RS resource in the CSI-RS resource setting is configured with more than one powerOffset or powerOffsetSS. In this case, the sub- configuration corresponds to the powerOffset or powerOffsetSS configured in the CSI-RS resource.

[0316] In some embodiments, if the CSI report configuration is associated with a CSI-RS resource setting. Each CSI-RS resource in the CSI-RS resource setting is configured with more than one powerOffset or powerOffsetSS. In some embodiments, the UE reports N CSI with reduced overhead.

[0317] In some embodiments, for a CSI report configuration associated with L sub- configurations or L adaptation modes, and the UE uses N CSI according to N sub- configurations or L adaptation modes out of the L sub- configurations or L adaptation modes, the number of CPUs occupied by the CSI report configuration (OCPU) is at least one of: A1, the number of resources of the i-th sub- configuration or the i-th adaptation mode (Bi), the scaling factor (f), N. A1 is the number of resources for the first sub- configuration or the first adaptation mode, or A1 is the number of resources for the reference sub- configuration or the reference adaptation mode (A1).

[0318] For example, v(j) is the number of resources of the sub- configuration or adaptation mode associated with the j-th CSI report that needs to be reported.

[0319] For example, or v(j) is the number of resources of the sub- configuration or adaptation mode associated with the j-th CSI report that needs to be reported.

[0320] For example, OCPU equals A1 plus a reduced value. The reduced value equals the scaling factor multiplied by the number of all resources of the sub- configuration (or adaptation mode) other than the reference sub- configuration (or adaptation mode) associated with the N CSI.

[0321] For example, .

[0322] In some embodiments, if the UE is configured to report N > 1 CSI with CQI index or differential CQI, the UE can assume at least one of the following in the CSI reference resource for deriving the CQI index or differential CQI, and if also configured, for deriving the PMI and RI:

[0323] one or more corresponding ratios of PDSCH EPRE to CSI-RS EPRE, if more than one ratio of PDSCH EPRE to CSI-RS EPRE is associated with the N CSIs, each ratio of PDSCH EPRE to CSI-RS EPRE is associated with one CSI (e.g., CQI, PMI, RI);

[0324] one or more corresponding sub-configuration or adaptation mode, if more than one sub-configuration or more than one adaptation mode is associated with the N CSIs, each sub-configuration or adaptation mode is associated with one CSI (e.g., CQI, PMI, RI);

[0325] For CQI computation, the UE can also assume that the PDSCH signal on the antenna ports in the set [1000,..., 1000+V-1] for v layers will result in an equivalent signal to the corresponding symbol transmitted on the N antenna ports for the N CSIs. Each antenna port is associated with one CSI. The antenna ports are associated with the activated ports associated with the CSI or the corresponding sub-configuration;

[0326] For each CQI computation in the N CSIs, the UE can also assume that the PDSCH signal on the antenna ports in the set [1000,..., 1000+V-1] for v layers will result in an equivalent signal to the corresponding symbol transmitted on the antenna ports [3000+P(1),..., 3000+P(n(k))] for the kth CSI in the N CSIs, where n(k) is the number of ports associated with the kth CSI, P(n(k)) is the nth(k) effective / or activated port index associated with the i-th CSI. As given;

[0327] W(i) is a precoding matrix determined by the common PMI or the PMI of one CSI in the N CSIs. In some embodiments, W(i) is a precoding matrix determined by the common PMI and is associated with the sub-configuration. In some embodiments, W(i) is a precoding matrix according to the PMI associated with the sub-configuration or the adaptation mode; and / or

[0328] The UE can assume that the ratio of the EPRE of the corresponding PDSCH signal transmitted on one antenna port to the CSI-RS EPRE is equal to the ratio configured in association with the CSI or the corresponding sub-configuration or adaptation mode.

[0329] In other words, if the UE is configured to report N > 1 CSI with CQI index or differential CQI, and if it is also configured to derive PMI and RI, the UE can assume N corresponding sub- configurations or N corresponding adaptation modes in the CSI reference resource in order to derive CQI index or differential CQI for the N CSI. Each of the N CSI is calculated with the corresponding sub-configuration or adaptation mode.

[0330] In the following paragraphs, details will be described in connection with some examples, but the present disclosure is not limited to the following examples.

[0331] Figure 4 A schematic diagram related to a wireless communication terminal 30 according to embodiments of the present disclosure. The wireless communication terminal 30 can be a tag, a mobile phone, a notebook computer, a tablet computer, an electronic book, or a portable computer system, and is not limited thereto. The wireless communication terminal 30 can be used to implement the UE described in the present disclosure. The wireless communication terminal 30 can include a processor 300 such as a microprocessor or an application specific integrated circuit (ASIC), a storage unit 310, and a communication unit 320. The storage unit 310 can be any data storage device that stores program codes 312 accessed and executed by the processor 300. Embodiments of the storage code 312 include, but are not limited to, a subscriber identity module (SIM), a read only memory (ROM), a flash memory, a random access memory (RAM), a hard disk, and an optical data storage device. The communication unit 320 can be a transceiver and is used to transmit and receive signals (e.g., messages or data packets) according to the processing result of the processor 300. In one embodiment, the communication unit 320 transmits and receives signals via at least one antenna 322.

[0332] In one embodiment, the storage unit 310 and the program codes 312 can be omitted, and the processor 300 can include a storage unit having stored program codes.

[0333] The processor 300 can implement any one of the steps in the exemplary embodiments on the wireless communication terminal 30, for example, by executing the program codes 312.

[0334] The communication unit 320 can be a transceiver. As an alternative or in addition, the communication unit 320 can combine a transmission unit and a reception unit configured to respectively transmit and receive signals to and from a wireless communication node.

[0335] In some embodiments, the wireless communication terminal 30 can be used to perform the operations of the UE described in the present disclosure. In some embodiments, the processor 300 and the communication unit 320 cooperatively perform the operations described in the present disclosure. For example, the processor 300 performs operations and transmits or receives signals, messages, and / or information through the communication unit 320.

[0336] Figure 5 A schematic diagram related to a wireless communication node 40 according to embodiments of the present disclosure. The wireless communication node 40 can be a satellite, a base station (BS), a gNB, a network entity, a domain name system (DNS) server, a mobility management entity (MME), a serving gateway (S-GW), a packet data network (PDN) gateway (P-GW), a radio access network (RAN), a next generation RAN (NG-RAN), a data network, a core network, a communication node in a core network, or a radio network controller (RNC), and is not limited herein. Further, the wireless communication node 40 can include (execute) at least one network function such as an access and mobility management function (AMF), a session management function (SMF), a user location function (UPF), a policy control function (PCF), an application function (AF), and the like. The wireless communication node 40 can be used to implement the gNB described in the present disclosure. The wireless communication node 40 can include a processor 400 such as a microprocessor or an ASIC, a storage unit 410, and a communication unit 420. The storage unit 410 can be any data storage device that stores program codes 412 accessed and executed by the processor 400. Examples of the storage unit 412 include, but are not limited to, a SIM, a ROM, a flash memory, a RAM, a hard disk, and an optical data storage device. The communication unit 420 can be a transceiver and be used to transmit and receive signals (e.g., messages or data packets) according to the processing result of the processor 400. In one example, the communication unit 420 transmits and receives signals via at least one antenna 422.

[0337] In one embodiment, the storage unit 410 and the program codes 412 can be omitted. The processor 400 can include a storage unit having stored program codes.

[0338] The processor 400 can implement any steps described in the exemplary embodiments on the wireless communication node 40, for example, by executing the program codes 412.

[0339] The communication unit 420 can be a transceiver. Alternatively or additionally, the communication unit 420 can combine a transmission unit and a reception unit configured to transmit and receive signals, messages, or information to and from a wireless communication node or a wireless communication terminal, respectively.

[0340] In some embodiments, the wireless communication node 40 can be used to perform operations of a gNB described in the present disclosure. In some embodiments, the processor 400 and the communication unit 420 cooperatively perform operations described in the present disclosure. For example, the processor 400 performs operations and transmits or receives signals through the communication unit 420.

[0341] According to embodiments of the present disclosure, a wireless communication method is also provided. In one embodiment, the wireless communication method can be performed by using a wireless communication terminal (e.g., a UE). In one embodiment, the wireless communication terminal can be implemented by using the wireless communication terminal 30 described in the present disclosure, but is not limited thereto.

[0342] Referring to Figure 6 In one embodiment, the wireless communication method includes receiving, by a wireless communication terminal from a wireless communication node, at least one channel state information (CSI) report configuration associated with a channel state information reference signal (CSI-RS) resource setting for channel measurement, wherein the CSI-RS resource setting includes one or more CSI-RS resources associated with one or more adaptation modes, and performing, by the wireless communication terminal, a CSI report according to the at least one CSI report configuration.

[0343] Details of this aspect can be determined with reference to the above paragraphs, which are not repeated here.

[0344] According to embodiments of the present disclosure, another wireless communication method is also provided. In one embodiment, the wireless communication method can be performed by using a wireless communication node (e.g., a gNB). In one embodiment, the wireless communication node can be implemented by using the wireless communication node 40 described in the present disclosure, but is not limited thereto.

[0345] Referring to Figure 7 In one embodiment, the wireless communication method includes transmitting, by a wireless communication node to a wireless communication terminal, at least one channel state information (CSI) report configuration associated with a channel state information reference signal (CSI-RS) resource setting for channel measurement, to allow the wireless communication terminal to perform a CSI report according to the at least one CSI report configuration, wherein the CSI-RS resource setting includes one or more CSI-RS resources associated with one or more adaptation modes.

[0346] Details of this aspect can be determined with reference to the above paragraphs, which are not repeated here.

[0347] In some embodiments, the relay wireless communication terminal used in the present disclosure can indicate the above-described UE.

[0348] In some embodiments, the wireless communication node used in the present disclosure can indicate the above-described gNB.

[0349] While various embodiments of this disclosure have been described above, it should be understood that these embodiments are by way of example only and not as limiting. Similarly, various figures may depict exemplary architectures or configurations provided to enable those skilled in the art to understand the exemplary features and functionality of this disclosure. However, those skilled in the art should understand that this disclosure is not limited to the example architectures or configurations shown, but can be implemented using various alternative architectures and configurations. Furthermore, as those skilled in the art should understand, one or more features of one embodiment may be combined with one or more features of another embodiment described herein. Therefore, the breadth and scope of this disclosure should not be limited to any of the exemplary embodiments described above.

[0350] It should also be understood that any reference to elements in this document using names such as “first”, “second”, etc., does not generally limit the number or order of these elements. Rather, these names may be used herein as a convenient means of distinguishing two or more elements or instances of elements. Therefore, references to first and second elements do not imply that only two elements can be used, or that the first element must somehow precede the second element.

[0351] Furthermore, those skilled in the art will understand that information and signals can be represented using any of a variety of different technologies and processes. For example, data, instructions, commands, information, signals, bits, and symbols that may be referenced in the above description can be represented by voltage, current, electromagnetic waves, magnetic fields or particles, light fields or particles, or any combination thereof.

[0352] Those skilled in the art will also understand that any of the various illustrative logic blocks, units, processors, devices, circuits, methods, and functions described in connection with the aspects disclosed herein can be implemented by electronic hardware (e.g., digital implementation, analog implementation, or a combination of both), firmware, various forms of instruction-containing program or design code (which may be referred to herein as "software" or "software unit" for convenience), or any combination of these technologies.

[0353] To clearly illustrate this interchangeability of hardware, firmware and software, various illustrative components, blocks, units, 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 thereof, depends upon the particular application and design constraints imposed on the overall system. Skilled artisans can implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure. According to various embodiments, a processor, device, component, circuit, structure, machine, unit, etc. can be configured to perform one or more of the functions described herein. The term "configured to" or "configured for" as used herein with respect to a processor, device, component, circuit, structure, machine, unit, etc. means that the processor, device, component, circuit, structure, machine, unit, etc. is physically constructed or otherwise arranged to perform the particular operation or function.

[0354] Furthermore, those skilled in the art will appreciate that the various illustrative logical blocks, units, devices, components, and circuits described herein can be implemented or performed using integrated circuits (ICs): application specific integrated circuits (ASICs), digital signal processors (DSPs), field programmable gate arrays (FPGAs) or other programmable logic devices, discrete gates or transistor logic, processing units, or combinations of various hardware components in integrated or distributed manner. Logical blocks, units, and circuits can further include antennas and / or transceivers to communicate in a network or with various components within a device. The general purpose processor can be a microprocessor, but in the alternative, the processor can be any conventional processor, controller, or state machine. A processor can also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration. If implemented in software, the functions can be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Therefore, the steps of a method or algorithm disclosed herein can be implemented as software stored on a computer-readable medium. A computer-readable medium includes both computer storage media and communication media including any medium that facilitates transfer of a computer program or code from one place to another. A storage media can be any available media that can be accessed by a computer. By way of example, and not limitation, such computer-readable media can comprise 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 carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, or twisted pair, then the coaxial cable, fiber optic cable, or twisted pair are included in the definition of medium. Disk and disc, as used herein, includes compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), and Blu-Ray® disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.

[0355] In addition to storage media, communications media can also include any medium that facilitates the transfer of a computer program or code from one place to another, e.g., according to a communication protocol. 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 comprise 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 carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, or twisted pair, then the coaxial cable, fiber optic cable, or twisted pair are included in the definition of medium. Disk and disc, as used herein, include compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), and Blu- Ray® disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.

[0356] In this document, the term "unit" as used herein, refers to software, firmware, hardware, and any combination of these elements that is used to perform the related functionality described herein. Furthermore, various elements of the present disclosure can be described as discrete elements and can actually comprise a combination of these elements. In addition, for discussion purposes, various elements of the present disclosure can be described as being stored in memory or on other memory when, in fact, these elements can be stored in the memory and / or other storage elements at various times during the life cycle of the present disclosure. Furthermore, the various elements of the present disclosure can be described as being performed by a processor, in fact, these elements can be performed by a processor or other logic device.

[0357] Furthermore, memory or other storage, as well as communication components can be employed in embodiments of the present disclosure. It will be appreciated that, for clarity, the foregoing description has described embodiments of the disclosure with reference to different functional elements and processors. However, it will be apparent that any suitable distribution of functionality between different functional elements, processing logic elements or domains can be used without detracting from the disclosure. For example, functionality illustrated to be performed by separate processing logic elements or controllers can be performed by the same processing logic element or controller. Hence, references to specific functional elements are only to be seen as references to suitable means for providing the described functionality, rather than indicative of a strict logical or physical structure or organization.

[0358] Various modifications to the implementations described in this disclosure can be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other implementations without departing from the scope of the claims. Thus, the present disclosure is not intended to be limited to the implementations shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein and made apparent to others skilled in the art by the teachings herein.

Claims

1. A wireless communication method, comprising: A wireless communication terminal receives from a wireless communication node at least one Channel State Information (CSI) report configuration associated with a Channel State Information Reference Signal (CSI-RS) resource setting for channel measurement, wherein the CSI-RS resource setting includes one or more CSI-RS resources associated with one or more adaptation modes; and The CSI report is executed by the wireless communication terminal according to the configuration of the at least one CSI report.

2. The wireless communication method according to claim 1, wherein, In response to the satisfaction of a first condition, the wireless communication terminal reports to the wireless communication node that there is no CSI with reduced overhead, and the first condition includes at least one of the following: The CSI report configuration corresponding to the CSI indicates that the CSI report is non-periodic; The CSI report configuration corresponding to the CSI is activated or triggered by the downlink control information (DCI). The wireless communication terminal is configured with Radio Resource Control (RRC) signaling, which indicates that the CSI without overhead reduction is reported. The CSI report configuration corresponding to the CSI includes more than one codebook configuration parameter set; The wireless communication terminal did not receive an indication of the reference adaptation mode; The wireless communication terminal receives an indication that the CSI without overhead reduction is reported; The CSI report is transmitted over the physical uplink shared channel; The number of CSIs in the CSI report is less than the threshold; The number of adaptation patterns associated with the corresponding CSI report configuration is less than the threshold; or The number of CSI processing units in the wireless communication terminal is greater than or equal to a threshold.

3. The wireless communication method according to claim 1 or 2, wherein, In response to the satisfaction of a second condition, the wireless communication terminal reports a CSI indicating reduced overhead to the wireless communication node, wherein the second condition includes at least one of the following: The wireless communication terminal receives an instruction to report the CSI with reduced overhead; The wireless communication terminal is configured with RRC signaling, which instructs the reporting of the overhead-reduced CSI. The wireless communication terminal receives an indication of the reference adaptation mode; The number of CSIs is equal to the number of adaptation modes associated with the corresponding CSI report configuration; The CSI report configuration corresponding to the CSI is associated with the first resource settings; The CSI report is transmitted in the physical uplink control channel; The number of CSIs in the CSI report is greater than or equal to the threshold; The number of adaptation modes associated with the corresponding CSI report configuration is greater than or equal to the threshold; or The CSI report configuration corresponding to the CSI includes at least one of the following: one or more port subset indications, only one codebook configuration parameter set, or more than one CSI report quantity.

4. The wireless communication method according to claim 3, wherein, The first resource setting includes at least one of the following: A resource set that includes only one resource; or Multiple resources, each configured with a group index or adaptation mode.

5. The wireless communication method according to any one of claims 1 to 4, wherein, The wireless communication terminal reports a CSI without reduced overhead every M CSI reports, where M is an integer greater than 1.

6. The wireless communication method according to any one of claims 1 to 5, wherein, The CSI reporting configuration includes L sub-configurations associated with K uplink resource configurations, where L and K are integers. Each uplink resource configuration corresponds to one or more sub-configurations among the L sub-configurations, and reports one or more CSIs corresponding to one or more sub-configurations among the L sub-configurations associated with the corresponding uplink resource configuration.

7. The wireless communication method according to claim 6, wherein, Without reducing overhead, one or more first CSIs based on one or more corresponding sub-configurations among the L sub-configurations are reported via the corresponding first uplink resource configuration.

8. The wireless communication method according to claim 7, wherein, The first uplink resource configuration is either the first uplink resource configuration configured in the CSI report configuration, or the uplink resource configuration with the lowest index in the CSI report configuration.

9. The wireless communication method according to any one of claims 6 to 8, wherein, Each uplink resource configuration is at least one of the following: Configure semiPersistentOnPUSCH; Configure semiPersistentOnPUCCH; Configure periodic; Configure reportSlotConfig; or Configure pucch-CSI-ResourceList.

10. The wireless communication method according to any one of claims 1 to 9, wherein, The wireless communication terminal receives an instruction for activating a CSI-RS resource set in the CSI-RS resource settings, a portion of the adaptation mode associated with the CSI report configuration corresponding to the CSI-RS resource set, or a portion of the adaptation mode associated with the CSI-RS resource set.

11. The wireless communication method according to any one of claims 1 to 10, wherein, The wireless communication terminal receives an indication to activate the CSI report configuration and a subset of all sub-configurations or a subset of all adaptation modes associated with the CSI report configuration to be activated.

12. The wireless communication method according to any one of claims 1 to 11, wherein, After the wireless communication terminal receives the first signaling, the wireless communication terminal is able to receive the second signaling. The first signaling has a first field indicating a first trigger state for activating the CSI reporting configuration and a second field indicating the activation of a first part of the sub-configurations among all sub-configurations or a first part of the adaptation modes among all adaptation modes associated with the CSI reporting configuration to be activated. The second signaling has a first field indicating a second trigger state for activating the CSI reporting configuration and a second field indicating the activation of a second part of the sub-configurations among all sub-configurations or a second part of the adaptation modes among all adaptation modes associated with the CSI reporting configuration to be activated. The first part of the sub-configuration and the second part of the sub-configuration are different, or the first part of the adaptation mode and the second part of the adaptation mode are different.

13. The wireless communication method according to any one of claims 1 to 12, wherein, After receiving the instruction of the first signaling, the wireless communication terminal is able to receive the instruction of the second signaling. The first signaling is used to activate the CSI reporting configuration and activate a first part of the sub-configuration among all sub-configurations or a first part of the adaptation mode among all adaptation modes associated with the CSI reporting configuration to be activated. The second signaling is used to activate the CSI reporting configuration and activate a second part of the sub-configuration among all sub-configurations or a second part of the adaptation mode among all adaptation modes associated with the CSI reporting configuration to be activated. The first trigger state indicated in the field of the first signaling indicates the CSI reporting configuration and the first part of the sub-configuration or the first part of the adaptation mode to be activated. The second trigger state indicated in the field of the second signaling indicates the CSI reporting configuration and the second part of the sub-configuration or the second part of the adaptation mode to be activated. The first part of the sub-configuration and the second part of the sub-configuration are different, or the first part of the adaptation mode and the second part of the adaptation mode are different.

14. The wireless communication method according to any one of claims 1 to 13, wherein, The first or second signaling is a downlink control information (DCI) or a media access control (MAC) control unit (CE). The bitmap is used to activate a subset of all sub-configurations or a subset of all adaptation modes associated with the CSI reporting configuration to be activated. Each bit in the bitmap is associated with one or more sub-configurations or one or more adaptation modes. The first value of the bit indicates that one or more corresponding sub-configurations or one or more corresponding adaptation modes are not activated or are deactivated, and the second value, which is different from the first value of the bit, indicates that one or more corresponding sub-configurations or one or more corresponding adaptation modes are activated.

15. The wireless communication method according to any one of claims 1 to 14, wherein, The wireless communication terminal reports a reduced overhead CSI, which includes at least a differential RI, wherein the differential RI indicates an offset between a first RI value and a second RI value, and is indicated by a 1-bit field, wherein one state of the 1-bit field indicates that the offset value is 0, and another state of the 1-bit field indicates that the offset value is -1.

16. The wireless communication method according to any one of claims 1 to 15, wherein, The wireless communication terminal reports a reduced overhead CSI, which includes at least a Worst Layer Indicator (WLI), and the WLI indicates which column of the precoding matrix of the common PMI corresponds to the weakest layer of the codeword.

17. A wireless communication method, comprising: A wireless communication node sends at least one Channel State Information (CSI) report configuration associated with a Channel State Information Reference Signal (CSI-RS) resource setting for channel measurement to a wireless communication terminal, allowing the wireless communication terminal to perform CSI reporting according to the at least one CSI report configuration, wherein the CSI-RS resource setting includes one or more CSI-RS resources associated with one or more adaptation modes.

18. The wireless communication method according to claim 17, wherein, In response to the satisfaction of a first condition, the wireless communication terminal reports to the wireless communication node that there is no CSI with reduced overhead, and the first condition includes at least one of the following: The CSI report configuration corresponding to the CSI indicates that the CSI report is non-periodic; The CSI report configuration corresponding to the CSI is activated or triggered by the downlink control information (DCI). The wireless communication terminal is configured with Radio Resource Control (RRC) signaling, which indicates that there is no CSI report with reduced overhead. The CSI report configuration corresponding to the CSI includes more than one codebook configuration parameter set; The wireless communication terminal did not receive an indication of the reference adaptation mode; The wireless communication terminal receives an indication that the CSI without overhead reduction is reported; The CSI report is transmitted over the physical uplink shared channel; The number of CSIs in the CSI report is less than the threshold; The number of adaptation patterns associated with the corresponding CSI report configuration is less than the threshold; or The number of CSI processing units in the wireless communication terminal is greater than or equal to a threshold.

19. The wireless communication method according to claim 17 or 18, wherein, In response to the satisfaction of a second condition, the wireless communication terminal reports a CSI indicating reduced overhead to the wireless communication node, wherein the second condition includes at least one of the following: The wireless communication terminal receives an instruction to report the CSI with reduced overhead; The wireless communication terminal is configured with RRC signaling, which indicates the reporting of CSI with reduced overhead. The wireless communication terminal receives an indication of the reference adaptation mode; The number of CSIs is equal to the number of adaptation modes associated with the corresponding CSI report configuration; The CSI report configuration corresponding to the CSI is associated with the first resource settings; The CSI report is transmitted in the physical uplink control channel; The number of CSIs in the CSI report is greater than or equal to the threshold; The number of adaptation modes associated with the corresponding CSI report configuration is greater than or equal to the threshold; or The CSI report configuration corresponding to the CSI includes at least one of the following: one or more port subset indications, only one codebook configuration parameter set, or more than one CSI report quantity.

20. The wireless communication method according to claim 19, wherein, The first resource setting includes at least one of the following: A resource set that includes only one resource; or Multiple resources, each configured with a group index or adaptation mode.

21. The wireless communication method according to any one of claims 17 to 20, wherein, The wireless communication terminal reports a CSI without reduced overhead every M CSI reports, where M is an integer greater than 1.

22. The wireless communication method according to any one of claims 17 to 21, wherein, The CSI reporting configuration includes L sub-configurations associated with K uplink resource configurations, where L and K are integers. Each uplink resource configuration corresponds to one or more sub-configurations among the L sub-configurations, and reports one or more CSIs corresponding to one or more sub-configurations among the L sub-configurations associated with the corresponding uplink resource configuration.

23. The wireless communication method according to claim 22, wherein, Without reducing overhead, one or more first CSIs based on one or more corresponding sub-configurations among the L sub-configurations are reported via the corresponding first uplink resource configuration.

24. The wireless communication method according to claim 23, wherein, The first uplink resource configuration is either the first uplink resource configuration configured in the CSI report configuration, or the uplink resource configuration with the lowest index in the CSI report configuration.

25. The wireless communication method according to any one of claims 22 to 24, wherein, Each uplink resource configuration is at least one of the following: Configure semiPersistentOnPUSCH; Configure semiPersistentOnPUCCH; Configure periodic; Configure reportSlotConfig; or Configure pucch-CSI-ResourceList.

26. The wireless communication method according to any one of claims 17 to 25, wherein, The wireless communication terminal receives an instruction for activating a CSI-RS resource set in the CSI-RS resource settings, a portion of the adaptation mode associated with the CSI report configuration corresponding to the CSI-RS resource set, or a portion of the adaptation mode associated with the CSI-RS resource set.

27. The wireless communication method according to any one of claims 17 to 26, wherein, The wireless communication terminal receives an indication to activate the CSI report configuration and a subset of all sub-configurations or a subset of all adaptation modes associated with the CSI report configuration to be activated.

28. The wireless communication method according to any one of claims 17 to 27, wherein, After the wireless communication terminal receives the first signaling, the wireless communication terminal is able to receive the second signaling. The first signaling has a first field indicating a first trigger state for activating the CSI reporting configuration and a second field indicating the activation of a first part of the sub-configurations among all sub-configurations or a first part of the adaptation modes among all adaptation modes associated with the CSI reporting configuration to be activated. The second signaling has a first field indicating a second trigger state for activating the CSI reporting configuration and a second field indicating the activation of a second part of the sub-configurations among all sub-configurations or a second part of the adaptation modes among all adaptation modes associated with the CSI reporting configuration to be activated. The first part of the sub-configuration and the second part of the sub-configuration are different, or the first part of the adaptation mode and the second part of the adaptation mode are different.

29. The wireless communication method according to any one of claims 17 to 28, wherein, After receiving the instruction of the first signaling, the wireless communication terminal is able to receive the instruction of the second signaling. The first signaling is used to activate the CSI reporting configuration and activate a first part of the sub-configuration among all sub-configurations or a first part of the adaptation mode among all adaptation modes associated with the CSI reporting configuration to be activated. The second signaling is used to activate the CSI reporting configuration and activate a second part of the sub-configuration among all sub-configurations or a second part of the adaptation mode among all adaptation modes associated with the CSI reporting configuration to be activated. The first trigger state indicated in the field of the first signaling indicates the CSI reporting configuration and the first part of the sub-configuration or the first part of the adaptation mode to be activated. The second trigger state indicated in the field of the second signaling indicates the CSI reporting configuration and the second part of the sub-configuration or the second part of the adaptation mode to be activated. The first part of the sub-configuration and the second part of the sub-configuration are different, or the first part of the adaptation mode and the second part of the adaptation mode are different.

30. The wireless communication method according to any one of claims 17 to 29, wherein, The first or second signaling is a downlink control information (DCI) or a media access control (MAC) control unit (CE). The bitmap is used to activate a subset of all sub-configurations or a subset of all adaptation modes associated with the CSI reporting configuration to be activated. Each bit in the bitmap is associated with one or more sub-configurations or one or more adaptation modes. The first value of the bit indicates that one or more corresponding sub-configurations or one or more corresponding adaptation modes are not activated or are deactivated, and the second value, which is different from the first value of the bit, indicates that one or more corresponding sub-configurations or one or more corresponding adaptation modes are activated.

31. The wireless communication method according to any one of claims 17 to 30, wherein, The wireless communication terminal reports a reduced overhead CSI, which includes at least a differential RI, wherein the differential RI indicates an offset value between a first RI and a second RI, and is indicated by a 1-bit field, wherein one state of the 1-bit field indicates that the offset value is 0, and another state of the 1-bit field indicates that the offset value is -1.

32. The wireless communication method according to any one of claims 17 to 31, wherein, The wireless communication terminal reports a reduced overhead CSI, which includes at least a Worst Layer Indicator (WLI), and the WLI indicates which column of the precoding matrix of the common PMI corresponds to the weakest layer of the codeword.

33. A wireless communication terminal, comprising: Communication unit; and A processor configured to: receive, via the communication unit, from a wireless communication node at least one Channel State Information (CSI) report configuration associated with a Channel State Information Reference Signal (CSI-RS) resource setting for channel measurement, wherein the CSI-RS resource setting includes one or more CSI-RS resources associated with one or more adaptation modes; and execute a CSI report according to the at least one CSI report configuration.

34. The wireless communication terminal according to claim 33, wherein, The processor is also configured to perform the wireless communication method according to any one of claims 2 to 16.

35. A wireless communication node, comprising: Communication unit; and A processor configured to: transmit via the communication unit to a wireless communication terminal at least one Channel State Information (CSI) report configuration associated with a Channel State Information Reference Signal (CSI-RS) resource setting for channel measurement, to allow the wireless communication terminal to perform a CSI report according to the at least one CSI report configuration, wherein the CSI-RS resource setting includes one or more CSI-RS resources associated with one or more adaptation modes.

36. The wireless communication node according to claim 35, wherein, The processor is also configured to perform the wireless communication method according to any one of claims 18 to 32.

37. A computer program product comprising computer-readable program medium code stored thereon, which, when executed by a processor, causes the processor to implement the wireless communication method according to any one of claims 1 to 32.

Images