Techniques for reporting channel state information

Abstract

A device receives control signaling including a first channel state information (CSI) report configuration. The device transmits, to a network node, one or more CSI reports based on at least the first CSI report configuration. For example, the first CSI report configuration can include port selection information or power offset information. In some examples, the first CSI report configuration is associated with a second CSI report configuration.

Description

Technical Field

[0001] This document generally deals with wireless communication. Background Technology

[0002] Wireless communication technology is driving the world toward an increasingly interconnected and networked society. The rapid development and technological advancements in wireless communication have led to ever-increasing demands for capacity and connectivity. Other factors, such as energy consumption, equipment cost, spectrum efficiency, and latency, are also important for meeting the needs of various communication scenarios. Compared to existing wireless networks, next-generation systems and wireless communication technologies need to support more users and devices and support an increasingly mobile society. Summary of the Invention

[0003] This article provides techniques for configuring and reporting channel state information (CSI).

[0004] In some respects, the techniques described herein relate to a wireless communication method comprising: receiving control signaling by a wireless device including a first channel state information (CSI) report configuration; and sending one or more CSI reports to a network node based on at least the first CSI report configuration.

[0005] In some respects, the techniques described herein relate to a wireless communication method comprising: transmitting control signaling by a network node including a first channel state information (CSI) report configuration; and receiving from a wireless device one or more CSI reports based on at least the first CSI report configuration.

[0006] In other examples, the above methods are implemented in the form of processor-executable code and stored in a computer-readable program medium.

[0007] In yet another example aspect, a device configured or operable to perform the methods described above is disclosed.

[0008] The above and other aspects and their embodiments are described in more detail in the accompanying drawings, description and claims. Attached Figure Description

[0009] Figure 1 Examples of wireless communication systems based on some exemplary embodiments of the disclosed technology are shown.

[0010] Figure 2 An example of a CSI reporting procedure according to an embodiment of this disclosure is shown.

[0011] Figure 3 An example of a CSI reporting procedure according to an embodiment of this disclosure is shown.

[0012] Figure 4 A flowchart of an example wireless communication process according to an embodiment of this disclosure is shown.

[0013] Figure 5 A flowchart of an example wireless communication process according to an embodiment of this disclosure is shown.

[0014] Figure 6 This is a block diagram representation of a portion of an apparatus based on some embodiments of the disclosed technology. Detailed Implementation

[0015] The section headings used in this document are for ease of understanding only and do not limit the scope of the embodiments to the sections in which they are described. Furthermore, although the embodiments are described with reference to examples of 5G, the disclosed techniques can be applied to wireless systems using protocols other than 5G or 3GPP protocols.

[0016] Widebandwidth, multi-antenna systems are increasingly used in the telecommunications field. As the number of spatial elements increases, so does power consumption. To reduce network power consumption (e.g., gNodeB (gNB)), one approach is to reduce the number of antennas or antenna ports. However, channel characteristics change with the number of antennas. To help the network obtain channel states for different numbers of antennas, multiple Channel State Information (CSI) with different antenna modes are needed. Multiple CSIs corresponding to different antenna modes can be obtained through specific CSI reporting configuration types. However, requiring user equipment (UE) to report multiple CSIs is costly. The technology described in this patent document addresses these issues by improving the configuration and reporting methods of CSI.

[0017] Figure 1An example of a wireless communication system (e.g., a long-term evolution (LTE), 5G, or NR cellular network) is illustrated, comprising a BS120 and one or more user equipments (UEs) 111, 112, and 113. In some embodiments, uplink (UL) transmissions (131, 132, 133) may include uplink control information (UCI), higher-layer signaling (e.g., UE assistance information or UE capabilities), or uplink information. In some embodiments, downlink (DL) transmissions (141, 142, 143) may include downlink control information (DCI) or higher-layer signaling or downlink information. The UE may be, for example, a smartphone, tablet, mobile computer, machine-to-machine (M2M) device, terminal, mobile device, Internet of Things (IoT) device, etc.

[0018] UE 111, UE 112, or UE 113 can perform CSI measurements based on the CSI reference signal (CSI-RS) and report the corresponding data to BS120. UE 111-113 can configure one or more CSI reporting configurations via CSI-ReportConfig signaling. CSI-ReportConfig is associated with one or more CSI-RS resource settings via CSI-resourceConfigID. The CSI-RS resource settings are configured by CSI-ResourceConfig signaling.

[0019] The number of ports in a CSI-RS system is configured by `nrofPorts` in `CSI-ResourceMapping`, which is associated with a non-zero power CSI RS resource (NZP-CSI-RS-Resource). `NZP-CSI-RS-Resource` is associated with `NZP-CSI-RS-ResourceSet`. `NZP-CSI-RS-ResourceSet` is associated with `CSI-ResourceConfig`. `CSI-ResourceConfig` is associated with `CSI-ReportConfig`. `nrofPorts` can be one of the following: p1, p2, p4, p8, p12, p16, p24, or p32. For example, p1 can refer to one port.

[0020] Reporting Framework

[0021] To perform a CSI report, the UE (e.g., UE 111-113) first receives control signaling, such as radio resource control (RRC) signaling, from a network node (e.g., BS120). The RRC signaling includes one or more CSI report configurations, including a first CSI report configuration. The UE performs the CSI report based on at least the first CSI report configuration.

[0022] In some embodiments, CSI reporting configuration is associated with a CSI-RS resource. A CSI-RS resource can be at least one of the following: (e.g., a resource configured by NZP-CSI-RS-Resource), a resource map, (e.g., a resource set configured by NZP-CSI-RS-ResourceSet), or (e.g., a resource setting configured by CSI-ResourceConfig).

[0023] CSI reports can be executed based on one or more resource parameters. For example, resource parameters may include at least one of the following: number of ports, port index indication, power offset, index (e.g., CSI-RS Resource Indicator (CRI), resource ID, resource set ID, resource setting ID), transmission configuration indicator (TCI), code division multiplexing (CDM) type, resource mapping, CDM group index, frequency domain resource, time domain resource, or group index.

[0024] Power offset can correspond to the parameter powerControlOffset or the parameter powerControlOffsetSS. "Number of ports" can refer to the number of CSI-RS ports, such as 2, 4, 8, 16, 32, etc.

[0025] powerControlOffset refers to the assumed ratio of energy per resource element (EPRE) to non-zero power (NZP) CSI-RS EPRE of the Physical Downlink Shared Channel (PDSCH) when the UE derives CSI feedback. powerControlOffset can take values ​​in the range [-8, 15] dB in 1 dB increments.

[0026] powerControlOffsetSS refers to the assumed ratio of NZP CSI-RS EPRE to the EPRE of the synchronization signal / physical broadcast channel (SS / PBCH) block.

[0027] In some embodiments, the CSI report configuration corresponds to the CSI-ReportConfig configured by RRC signaling.

[0028] CSI Report Configuration

[0029] As described above, the UE can be configured with a first CSI report configuration. The UE then reports one or more CSI reports based on this first CSI report configuration. This document will further describe in detail the implementation details of the first CSI report configuration.

[0030] In some embodiments, the first CSI report configuration configures a set {N1, N2} that is not consistent with the total number of ports. The set {N1, N2} is inconsistent with the total number of ports when 2*N1*N2 is not equal to the total number of ports. For example, 2*N1*N2 may be less than the total number of ports. In this case, N1 may be associated with the number of ports in a first dimension, and N2 may be associated with the number of ports in a second dimension. For example, 2*N1 may be less than or equal to the number of antenna ports in the horizontal dimension, and 2*N2 may be less than or equal to the number of antenna ports in the vertical dimension.

[0031] N1 and N2 can be configured in a CSI report configuration (e.g., a first CSI report configuration), and the number of ports can be configured in a CSI-RS resource associated with the first CSI report configuration.

[0032] In some embodiments, the first CSI reporting configuration is configured with port selection information or power offset information. The port selection information is used to select one or more ports from the total number of ports configured in the CSI-RS resource associated with the first CSI reporting configuration. For example, the number of selected ports may be less than the number of ports configured in the CSI-RS resource associated with the CSI reporting configuration. In some embodiments, the port selection information includes at least one of the following: a bitmap, {N1, N2}, the number of ports, a port index set, and a scaling factor.

[0033] In some embodiments, the scaling factor is greater than or equal to 0 and less than 10. For example, the scaling factor can be 1 / 2, 1 / 4, 1 / 8, 1 / 3, 3 / 8, 1, 2, 3, 4, or 8. In some embodiments, the scaling factor is used to determine the number of second ports based on the number of first ports. The number of first ports is the number of ports configured in the CSI-RS resource associated with the CSI report configuration. The number of second ports is determined by multiplying the number of first ports by the scaling factor. After receiving the scaling factor indication, the UE can select the number of second ports from the number of first ports.

[0034] In some embodiments, the power offset information indicates a second power offset that replaces a first power offset configured in the CSI-RS resource associated with the CSI reporting configuration. In some embodiments, the power offset information indicates an increment value applied to the first power offset configured in the CSI-RS resource associated with the CSI reporting configuration. This increment value can then be used to determine the second power offset based on the first power offset. For example, the second power offset = function(first power offset, increment), where the function (A, B) is one of A+B, AB, A*B, and A / B.

[0035] In some embodiments, the CSI reporting configuration is configured with an indication that indicates whether the CSI reporting configuration is a first CSI reporting configuration or a second CSI reporting configuration. A second CSI reporting configuration is a CSI reporting configuration associated with one or more first CSI reporting configurations. For example, a first CSI reporting configuration may be a "baseline" CSI reporting configuration supplemented by a second CSI reporting configuration, or a second CSI reporting configuration may be a "baseline" CSI reporting configuration supplemented by a first CSI reporting configuration.

[0036] In some embodiments, if the CSI report configuration is the first CSI report configuration, no parameters other than the first parameter are configured. The first parameter may include at least one of the following: a related indicator, reportConfigType, pucch-CSI-ResourceList, a parameter set for periodic or semi-persistent reporting, a port selection indicator, a codebook configuration, a codebook subset limit, an RI limit, a power offset, an increment of the power offset, a port number indicator, or a set of {N1, N2}.

[0037] Using the first parameter, the UE can generate a CSI report based on the CSI-RS resources configured in the relevant second CSI report configuration and at least one of the following: port selection indication, codebookconfig, {N1,N2} set, codebook subset restriction, RI restriction, or port quantity indication. The UE can report a CSI report based on at least one of the following: reportConfigType, pucch-CSI-ResourceList, and the parameter set for periodic or semi-persistent reporting.

[0038] The first CSI report configuration does not configure parameters other than the first parameter. Parameters corresponding to these parameters not configured in the first CSI report configuration can be included in the relevant second CSI report configuration.

[0039] Therefore, the first CSI report associated with a first CSI report configuration can have different information than the second CSI report associated with a second CSI report configuration. For example, the first CSI report may not include RI or PMI, while the second CSI report may include RI or PMI. In another example, the first CSI report may include column index information, while the second CSI report may not. Such column index information can indicate the columns of the precoded matrix used for the CSI report. Compared to using a larger configuration, this increases flexibility while maintaining relatively low signaling overhead by including different information in multiple CSI report configurations and reports that are related to each other.

[0040] In some embodiments, the first CSI report configuration indicates that multiple CSIs reported according to the first CSI report configuration, such as the rank indicator (RI), the precoding matrix indicator (PMI), or the channel quality indicator (CQI), are associated with the second CSI report configuration.

[0041] In some embodiments, the first CSI report configuration indicates another CSI report configuration associated with the first CSI report configuration. For example, the first CSI report configuration may indicate the CSI report configuration ID (e.g., CSI-ReportConfigID) of the associated CSI report configuration.

[0042] When the first CSI report configuration is related to the second CSI report configuration, at least one of the following will occur:

[0043] (1) The CSI (e.g., RI, PMI, CQI) configured according to the first CSI report is based on the CSI (e.g., RI, PMI, CQI) configured according to the second CSI report.

[0044] (2) The CSI quantity set of the configuration report for the first CSI report is a subset of the CSI quantity set of the configuration report for the second CSI report.

[0045] (3) The CSI-RS resources associated with the first CSI report configuration are the same as those associated with the second CSI report configuration.

[0046] (4) The number of CSI quantities (e.g., RI, PMI, or CQI) configured for the first CSI report is less than the number of CSI quantities configured for the second CSI report.

[0047] (a) For example, a report RI can be configured for the first CSI report, while a report RI, PMI, and CQI can be configured for the second CSI report.

[0048] (b) In some embodiments, the CSI amount for a report not configured for the first report is the same as the corresponding CSI amount for a report configured for the second report.

[0049] (c) In some embodiments, the CSI quantity for which a report is not configured for the first report can be derived from the corresponding CSI quantity for which a report is configured for the second report.

[0050] (5) The CSI (e.g., RI, PMI, or CQI) of the report configured according to the first CSI report is the difference related to the corresponding CSI (e.g., RI, PMI, or CQI) of the report configured according to the second CSI report.

[0051] Multiple CSI reports

[0052] One or more first CSI report configurations may be associated with multiple CSI reports. In some embodiments, the first CSI report configuration is configured with at least one of the following: multiple report volumes, multiple codebook configurations, multiple csi-reportModes, multiple reportConfigTypes, multiple reportFreqConfigurations, multiple subband sizes, multiple cqi-BitsPerSubband, multiple port selection information, multiple physical uplink control channel (PUCCH) resources, or multiple power offset information.

[0053] For example, each CSI report can be measured based on a port selection information or a power offset information. In another example, each CSI report is performed according to a report configuration type (e.g., reportConfigType). In yet another example, each CSI report is reported within a single PUCCH resource. Similarly, each CSI report can be reported based on one of multiple report quantities. Generally, different CSI reports can be reported based on the different configurations listed above. For example, in some embodiments, a CSI report is associated with a first CSI report configuration. One or more first CSI report configurations are associated with the same second CSI report configuration. In some embodiments, multiple CSI reports are associated with a first CSI report configuration.

[0054] In some embodiments, the first CSI report configuration is a CSI report configuration that includes a list of report types (e.g., a list of reportConfigTypes) or more than one report type (e.g., reportConfigType). The first CSI report configuration may also include at least one of the following: port selection indication, multiple {N1,N2} sets, multiple codebook configurations, multiple codebook subset restrictions, multiple RI restrictions, or multiple port quantity indications.

[0055] The reportConfigType is associated with port selection indication, codebook configuration, codebook subset limitation, RI limitation, or port quantity indication.

[0056] The UE generates multiple CSI reports based on a first CSI report configuration. Each CSI report is generated based on at least one of the following included in the first CSI report configuration: port selection indication, codebook configuration, codebook subset restriction, {N1,N2} set, power offset indication, RI restriction, or port number indication. The CSI report is reported according to one of the multiple reportConfigTypes (e.g., in the reportConfigType list).

[0057] The reportConfigType can indicate the time-domain behavior or resources of the report configuration. The reportConfigType can also indicate at least one of the following: the periodicity and offset of the report configuration for periodic and semi-persistent CSI reporting, the PUCCH resource list for the report configuration of CSI reported on PUCCH, or the report slot offset list for the report configuration of CSI reported on the physical uplink shared channel (PUSCH).

[0058] Multiple CSI reports can also be configured based on the first CSI report, as shown below. In some embodiments, the first CSI report configuration includes at least one of the following: multiple sets of parameters for periodic or semi-persistent reporting, or more than one pucch-CSI-ResourceList.

[0059] The first CSI report configuration may also include at least one of the following: port selection indicator, more than one codebook configuration, more than one codebook subset limit, more than one RI limit, power offset indicator, or more than one port number indicator. Each parameter set is associated with at least one of the following: port selection indicator, codebookconfig, {N1,N2} set, codebook subset limit, RI limit, or port number indicator.

[0060] The UE generates multiple CSI reports, each based on at least one of the following included in the CSI report configuration: port selection indication, codebookconfig, codebook subset restriction, {N1,N2} set, RI restriction, power offset indication, or port quantity indication. The CSI report is then reported based on one of the parameter sets from the multiple parameter sets.

[0061] Similarly, for a first CSI report configuration that includes multiple pucch-CSI-ResourceLists, each pucch-CSI-ResourceList may be associated with at least one of the following: port selection indication, codebook configuration, power offset indication, codebook subset restriction, {N1,N2} set, RI restriction, or port number indication.

[0062] The UE generates multiple CSI reports, each based on at least one of the following: port selection indication, power offset indication, codebook configuration, codebook subset restriction, {N1,N2} set, RI restriction, or port quantity indication. The multiple CSI reports are then reported based on one of the pucch-CSI-ResourceLists in more than one pucch-CSI-ResourceList.

[0063] In some embodiments, the parameter set includes: periodicity and offset for the reporting configuration of periodic and semi-persistent CSI reports, or a list of PUCCH resources for the reporting configuration of CSIs reported on PUCCH.

[0064] In some embodiments, the first CSI report configuration is a CSI report configuration that includes a pucch-CSI-ResourceList. This pucch-CSI-ResourceList is used to report multiple CSI reports, as follows:

[0065] The pucch-CSI-ResourceList includes more than one pucch-CSI-Resource for each bandwidth part (BWP). For example, the number of pucch-CSI-Resources in the pucch-CSI-ResourceList is N. ULBWP *N CSI , where N ULBWP N is the maximum number of UL BWPs. CSI The number of CSI reports to be reported is configured based on the first CSI report.

[0066] The UE generates multiple CSI reports, each of which is generated based on at least one of the following and reported according to a different pucch-CSI-Resource in the pucch-CSI-ResourceList: port selection indication or codebookconfig, codebook subset restriction or {N1,N2} set, or power offset indication, or RI restriction, or port number indication.

[0067] Second CSI report configuration

[0068] In some embodiments, the UE is configured with a second CSI reporting configuration. A second CSI reporting configuration may be associated with one or more first CSI reporting configurations. For example, as described above, CSI reporting can be configured using a first CSI reporting configuration and an "associated" second CSI reporting configuration.

[0069] In some embodiments, the associated second CSI report configuration and the first CSI report configuration are associated with the same CSI-RS resource.

[0070] The second CSI report configuration can be configured with a consistent {N1, N2} and number of ports. In this case, a consistent {N1, N2} and number of ports means that 2 * N1 * N2 equals the number of ports.

[0071] In some embodiments, the associated second CSI report configuration and the first CSI report configuration are configured to have the same group ID. This group ID indicates which group the associated second CSI report configuration and the first CSI report configuration belong to.

[0072] In some embodiments, the associated second CSI reporting configuration and one or more first CSI reporting configurations are configured with the same signaling, such as RRC signaling. This signaling indicates that the CSI reporting configuration is associated with one or more other CSI reporting configurations.

[0073] In some embodiments, one or more first CSI reporting configurations associated with the same second CSI reporting configuration are configured with the same PUCCH resource.

[0074] In some embodiments, ports for one or more first CSI reporting configurations associated with the same second CSI reporting configuration are nested. Ports are nested when a first port selected for first CSI reporting configuration A is a subset of a second port selected for another first CSI reporting configuration B. The number of first ports is less than the number of second ports. Furthermore, ports selected for one or more first CSI reporting configurations may be a subset of ports for the second CSI reporting configurations.

[0075] In some embodiments, the ports selected for one or more first CSI reporting configurations associated with the same second CSI reporting configuration are different. For example, the first port selected for first CSI reporting configuration A may partially overlap with the second port selected for another first CSI reporting configuration B, or they may not overlap at all.

[0076] In some embodiments, in one or more first CSI reporting configurations associated with the same second CSI reporting configuration, at least one of the following parameters is the same: time domain behavior, reporting volume, csi-reportMode, reportConfigType, reportFreqConfiguration, timeRestrictionForChannelMeasurements, CQI table, subband size, or cqi-BitsPerSubband.

[0077] In some embodiments, a second CSI reporting configuration and one or more first CSI reporting configurations are configured in a list or set. For example, the UE may receive signaling indicating a list of CSI reporting configurations. The CSI reporting configurations in this list are associated. The list of CSI reporting configurations includes at least one second CSI reporting configuration and one first CSI reporting configuration.

[0078] In some embodiments, signaling is configured in CSI-MeasConfig.

[0079] In some embodiments, the UE is configured with one or more CSI report configuration lists, wherein each CSI report configuration list is triggered or activated by a DCI or MAC control element (MAC CE).

[0080] In some embodiments, the CSI report configuration with the lowest ID in a CSI report configuration list is the second CSI report configuration. A CSI report configuration with an ID different from the lowest ID in the CSI report configuration list is the first CSI report configuration.

[0081] In some embodiments, the periodicity of the second CSI reporting configuration differs from that of the first CSI reporting configuration. For example, the periodicity of the second CSI reporting configuration may be a multiple of the periodicity of the first CSI reporting configuration. Similarly, the periodicity of the first CSI reporting configuration may be a multiple of the periodicity of the second CSI reporting configuration. In some examples, multiple CSIs reported based on the first CSI reporting configuration are based on the latest CSI report reported based on the second CSI reporting configuration prior to the first CSI reporting configuration.

[0082] In some embodiments, the periodicity of the second CSI report configuration is the same as that of the first CSI report configuration.

[0083] In some embodiments, the first CSI report configuration associated with the second CSI report configuration is activated or triggered only when the second CSI report configuration is activated or triggered.

[0084] In some embodiments, the second CSI report configuration and one or more first CSI report configurations associated with the second CSI report configuration are configured with the same CSI-Resource settings (e.g., CSI-ResourceConfig) for interference measurements (e.g., csi-IM-ResourcesForInterference or nzp-CSI-RS-ResourcesForInterference).

[0085] Temporal behavior

[0086] In some embodiments, a second CSI reporting configuration and one or more first CSI reporting configurations associated with the second CSI reporting configuration are activated or triggered. However, if there is no valid downlink slot in the serving cell for the CSI reference resource corresponding to the CSI reporting configuration, the CSI report for that serving cell is omitted in the corresponding uplink slot. Therefore, some techniques have been proposed to address this issue regarding multiple CSI reporting configurations.

[0087] In some embodiments, if no CSI report associated with a second CSI reporting configuration is reported, the UE does not report a CSI report associated with one or more first CSI reporting configurations. Note that the term "second" CSI reporting configuration does not imply an order relative to "first" CSI reporting configurations, and a CSI report associated with a second CSI reporting configuration may precede a CSI report associated with a first CSI reporting configuration.

[0088] In some embodiments, if no CSI report associated with a second CSI reporting configuration is reported in a period, the UE will not report a CSI report associated with one or more first CSI reporting configurations in the same period. An example of this CSI reporting procedure is as follows: Figure 2 As shown. For the first period 202, CSI report 204 of the second CSI report configuration is omitted, and CSI report 206 of the first CSI report configuration in the same period is also omitted. At the same time, another CSI report 208 of the second CSI report configuration is reported, and another CSI report 210 of the first CSI report configuration in the same period is also reported.

[0089] In some embodiments, if a CSI report associated with a second CSI report configuration is not reported for a CSI-RS resource timing report, the UE does not report CSI reports associated with one or more first CSI report configurations measured in the same CSI-RS resource timing.

[0090] In some embodiments, the most recent CSI report associated with the second CSI report configuration is reported in a plurality of time slots before the CSI report occasion associated with the first CSI report configuration. When the number of time slots is greater than X (or greater than or equal to X), the UE does not report the CSI report of the first CSI report configuration at the CSI report occasion.

[0091] For example, X can be predefined, configured by higher layer signaling, based on UE capabilities, or based on the CSI resource periodicity. For example, X can be the same as the CSI resource periodicity of the second CSI report configuration.

[0092] An example CSI reporting procedure is as Figure 3 shown. The CSI report 304 of the second CSI report configuration is omitted. As a result, the most recent CSI report 302 is the most recent CSI report associated with the second CSI report configuration. If the duration T between the CSI report occasion of the first CSI report configuration and the most recent CSI report 302 associated with the second CSI report configuration is greater than X, the UE does not report the CSI report of the first CSI report configuration at this CSI report occasion. As shown in the figure, when T < X, the CSI report 306 associated with the first CSI report configuration is reported, and when T > X, the CSI report 308 associated with the first CSI report configuration is not reported.

[0093] Figure 4 FIG. shows a flowchart of an example wireless communication process 400 according to an embodiment of the present disclosure. For example, process 400 can be performed by a wireless device (e.g., Figure 1 wireless devices 111-113).

[0094] In step 410, the wireless device receives control signaling including a first channel state information (CSI) report configuration from a network node. For example, the first CSI report configuration can include port selection information or power offset information.

[0095] In some embodiments, the first CSI report configuration is associated with a second CSI report configuration. For example, the signaling can indicate whether the CSI report configuration is the first CSI report configuration or the second CSI report configuration.

[0096] In some embodiments, the first CSI report configuration configures a first parameter set, the second CSI report configuration associated with the first CSI report configuration configures a second parameter set not included in the first parameter set, and the first CSI report configuration does not configure the parameters in the second parameter set.

[0097] In some embodiments, the first CSI report configuration includes a plurality of parameters. These parameters are related to time domain information or resources carrying one or more CSI reports.

[0098] In step 420, the wireless device transmits one or more CSI reports based on at least a first CSI report configuration to a network node.

[0099] For example, the one or more CSI reports may include a first CSI report and a second CSI report. In some embodiments, the first CSI report is based on first spatial and power information associated with M1 ports, and the second CSI report is based on second spatial and power information associated with M2 ports, where M1 < M2 and M1 and M2 are integers.

[0100] In some embodiments, the first CSI report does not include a precoding matrix indicator (PMI), while the second CSI report includes a PMI. In some embodiments, the first CSI report does not include a rank indicator (RI) or a PMI, while the second CSI report includes an RI and a PMI. In some embodiments, the second CSI report does not include column index information, while the first CSI report includes column index information. In some embodiments, the first CSI report includes a differential CQI, the second CSI report includes a CQI, and the differential CQI is based on the CQI in the second CSI report.

[0101] Figure 5 A flowchart of an example wireless communication process 500 according to an embodiment of the present disclosure is shown. For example, process 500 may be performed by a network node (e.g., Figure 1 BS120).

[0102] In step 510, the network node transmits control signaling including a first channel state information (CSI) report configuration to the wireless device. For example, the first CSI report configuration may include port selection information or power offset information.

[0103] In some embodiments, the first CSI report configuration is associated with a second CSI report configuration. For example, the signaling may indicate whether the CSI report configuration is the first CSI report configuration or the second CSI report configuration.

[0104] In some embodiments, the first CSI report configuration configures a first parameter set, the second CSI report configuration associated with the first CSI report configuration configures a second parameter set not included in the first parameter set, and the first CSI report configuration does not configure parameters in the second parameter set.

[0105] In some embodiments, the first CSI report configuration includes multiple parameters. These parameters are related to time domain information or resources carrying one or more CSI reports.

[0106] In step 520, the network node receives one or more CSI reports based on at least the first CSI report configuration from the wireless device.

[0107] For example, one or more CSI reports may include a first CSI report and a second CSI report. In some embodiments, the first CSI report is based on first spatial and power information associated with M1 ports, and the second CSI report is based on second spatial and power information associated with M2 ports, where M1 < M2 and M1 and M2 are integers.

[0108] In some embodiments, the first CSI report does not include a precoding matrix indicator (PMI), while the second CSI report includes a PMI. In some embodiments, the first CSI report does not include a rank indicator (RI) or a PMI, while the second CSI report includes an RI and a PMI. In some embodiments, the second CSI report does not include column index information, while the first CSI report includes column index information. In some embodiments, the first CSI report includes a differential CQI, the second CSI report includes a CQI, and the differential CQI is based on the CQI in the second CSI report.

[0109] Figure 6 is a block diagram representation of a portion of an apparatus in accordance with some embodiments of the disclosed technology. An apparatus 605, such as a network device or a base station or a wireless device (or UE), may include processor electronics 610, such as a microprocessor, that implements one or more of the techniques presented in this document. The apparatus 605 may include transceiver electronics 615 that are configured to transmit and / or receive wireless signals via one or more communication interfaces, such as antenna 620. The apparatus 605 may include other communication interfaces for transmitting and receiving data. The apparatus 605 may include one or more memories (not explicitly shown) configured to store information such as data and / or instructions. In some implementations, the processor electronics 610 may include at least a portion of the transceiver electronics 615. In some embodiments, the apparatus 605 is used to implement at least some of the disclosed techniques, modules, or functions.

[0110] It should be understood that this document discloses techniques that may be implemented in a wireless communication system to reduce the overhead of CSI reports.

[0111] Solution Terms

[0112] Some embodiments may preferably incorporate the following solutions as described herein.

[0113] For example, the clauses listed below may be implemented by the wireless devices described herein (e.g., Figure 1 UEs 111 - 113) for use.

[0114] Clause 1. A method of wireless communication (e.g., method 400) includes: receiving control signaling by a wireless device including a first channel state information (CSI) report configuration; and sending one or more CSI reports based on at least the first CSI report configuration to a network node.

[0115] Clause 2. The method described in Clause 1, wherein the first CSI report configuration includes port selection information or power offset information.

[0116] Clause 3. The method described in Clause 1 or 2, wherein the first CSI report configuration is associated with the second CSI report configuration.

[0117] Clause 4. The method according to Clause 3, wherein the first CSI report configuration includes a set {N1, N2}, wherein N1 is associated with the number of ports in the first direction and N2 is associated with the number of ports in the second direction, and wherein 2*N1*N2 is less than the total number of ports associated with the CSI-RS resources associated with the second CSI report configuration.

[0118] Clause 5. The method according to Clause 3 or 4, wherein the first CSI report configuration configures a first port set, wherein the second CSI report configuration configures a second port set, and wherein the first port set is a subset of the second port set.

[0119] Clause 6. The method according to any one of Clauses 3 to 5, wherein when a CSI report associated with the second CSI report configuration is not sent, a CSI report associated with the first CSI report configuration is also not sent.

[0120] Clause 7. The method according to any one of Clauses 3 to 6 further includes: transmitting a second CSI report associated with a second CSI report configuration, T times before the timeslot associated with the first CSI report associated with the first CSI report configuration, where T is a positive integer, wherein the wireless device does not transmit the first CSI report when T exceeds a threshold.

[0121] Clause 8. The method according to any one of Clauses 1 to 7, further comprising: receiving signaling, wherein the signaling is configured to indicate whether the CSI reporting configuration is a first CSI reporting configuration or a second CSI reporting configuration.

[0122] Clause 9. The method according to any one of Clauses 1 to 8, wherein the first CSI report configuration configures a first parameter set, and wherein the second CSI report configuration associated with the first CSI report configuration is not included in the second parameter set of the first parameter set, and wherein the first CSI report configuration is not configured with parameters in the second parameter set.

[0123] Clause 10. The method according to Clause 9, wherein the first parameter set includes at least one of the following: a related indication, reportConfigType, pucch-CSI-ResourceList, a parameter set for periodic or semi-persistent reporting, a port selection indication, a power offset indication, a codebook configuration, a codebook subset limitation, an RI limitation, or a port quantity indication.

[0124] Clause 11. The method according to any one of Clauses 1 to 10, wherein the indication in the first CSI reporting configuration is used to indicate a second CSI reporting configuration associated with the first CSI reporting configuration.

[0125] Clause 12. The method according to any one of Clauses 1 to 11, wherein the first CSI report configuration includes a plurality of parameters relating to time-domain information or resources carrying one or more CSI reports.

[0126] Clause 13. The method according to any one of Clauses 1 to 12, wherein the first CSI report configuration includes at least one of the following spatial and power information: one or more port selection information; multiple sets of {N1, N2}, wherein N1 is associated with the number of ports in a first direction and N2 is associated with the number of ports in a second direction; multiple codebook configurations; multiple power offsets; multiple codebook subset restrictions; multiple resource parameters; multiple rank indicator (RI) restrictions; or multiple port number indications.

[0127] Clause 14. The method according to Clause 12 or 13, wherein the parameter relating to time-domain information or resources among the plurality of parameters is associated with at least one of the following: port selection information, {N1,N2} set, power offset, codebook configuration, resource parameters, codebook subset limitation, RI limitation, or port quantity indication.

[0128] Clause 15. The method according to any one of Clauses 12 to 14, wherein the parameters relating to time-domain information or resources include at least one of the following: reportConfigType, a list of reportConfigTypes, a set of parameters for periodic or semi-persistent reporting, or a list indicating physical uplink control channel (PUCCH) resources for reporting.

[0129] Clause 16. The method according to any one of Clauses 12 to 15, wherein one or more CSI reports are sent in different PUCCH resources based on parameters relating to time-domain information or resources.

[0130] Clause 17. The method according to any one of Clauses 1 to 16, wherein one or more CSI reports include a first CSI report and a second CSI report, wherein the first CSI report is based on first spatial and power information associated with M1 ports, and the second CSI report is based on second spatial and power information associated with M2 ports, where M < M2, and M1 and M2 are integers.

[0131] Clause 18. The method according to any one of Clauses 1 to 17, wherein one or more CSI reports include a first CSI report and a second CSI report, wherein the first CSI report does not include a precoding matrix indicator (PMI), and wherein the second CSI report includes the PMI.

[0132] Clause 19. The method according to any one of Clauses 1 to 18, wherein one or more CSI reports include a first CSI report and a second CSI report, wherein the first CSI report does not include a rank indicator (RI) or a PMI, and wherein the second CSI report includes an RI and a PMI.

[0133] Clause 20. The method according to any one of Clauses 1 to 19, wherein one or more CSI reports include a first CSI report and a second CSI report, wherein the second CSI report does not include column index information, and wherein the first CSI report includes the column index information.

[0134] Clause 21. The method according to any one of Clauses 1 to 20, wherein one or more CSI reports include a first CSI report and a second CSI report, wherein the first CSI report includes a differential CQI, wherein the second CSI report includes a CQI, and wherein the differential CQI is based on the CQI in the second CSI report.

[0135] For example, the clauses listed below can be implemented by the network described herein (e.g., Figure 1 BS120) for use.

[0136] Clause 22. A method of wireless communication (e.g., method 500) includes: transmitting, by a network node, control signaling including a first channel state information (CSI) report configuration; and receiving, from a wireless device, one or more CSI reports based at least on the first CSI report configuration.

[0137] Clause 23. The method according to Clause 22, wherein the first CSI report configuration includes port selection information or power offset information.

[0138] Clause 24. The method according to Clause 22 or 23, wherein the first CSI report configuration is associated with a second CSI report configuration.

[0139] Clause 25. The method according to Clause 24, wherein the first CSI report configuration includes a set {N1, N2}, wherein N1 is associated with the number of ports in the first direction and N2 is associated with the number of ports in the second direction, and wherein 2*N1*N2 is less than the total number of ports associated with the CSI-RS resources associated with the second CSI report configuration.

[0140] Clause 26. The method according to Clause 24 or 25, wherein the first CSI report configuration configures a first port set, wherein the second CSI report configuration configures a second port set, and wherein the first port set is a subset of the second port set.

[0141] Clause 27. The method according to any one of Clauses 24 to 26, wherein when no CSI report associated with the second CSI report configuration is received, the network node does not receive the CSI report associated with the first CSI report configuration.

[0142] Clause 28. The method according to any one of Clauses 24 to 27 further includes: receiving a second CSI report associated with a second CSI report configuration for T time slots before the time slot associated with the first CSI report associated with the first CSI report configuration, where T is a positive integer, wherein the network node has not received the first CSI report when T exceeds a threshold.

[0143] Clause 29. The method according to any one of Clauses 22 to 28 further includes: sending signaling, wherein the signaling is configured to indicate whether the CSI reporting configuration is a first CSI reporting configuration or a second CSI reporting configuration.

[0144] Clause 30. The method according to any one of Clauses 22 to 29, wherein a first CSI report configuration configures a first parameter set, and wherein a second CSI report configuration associated with the first CSI report configuration is configured not to be included in a second parameter set in the first parameter set, and wherein the first CSI report configuration is not configured with parameters in the second parameter set.

[0145] Clause 31. The method according to Clause 30, wherein the first parameter set includes at least one of the following: a related indication, reportConfigType, pucch-CSI-ResourceList, a parameter set for periodic or semi-persistent reporting, a port selection indication, a power offset indication, a codebook configuration, a codebook subset limitation, an RI limitation, or a port quantity indication.

[0146] Clause 32. The method according to any one of Clauses 22 to 31, wherein the indication in the first CSI report configuration is used to indicate a second CSI report configuration associated with the first CSI report configuration.

[0147] Clause 33. The method according to any one of Clauses 22 to 32, wherein the first CSI report configuration includes a plurality of parameters related to time domain information or resources carrying one or more CSI reports.

[0148] Clause 34. The method according to any one of Clauses 22 to 33, wherein the first CSI report configuration includes at least one of the following spatial and power information: one or more port selection information; a plurality of {N1, N2} sets, where N1 is associated with the number of ports in a first direction and N2 is associated with the number of ports in a second direction; a plurality of codebook configurations; a plurality of power offsets; a plurality of codebook subset restrictions; a plurality of resource parameters; a plurality of rank indicator (RI) restrictions; or a plurality of port number indications.

[0149] Clause 35. The method according to Clause 33 or 34, wherein the parameters related to time domain information or resources among the plurality of parameters are associated with at least one of the following: port selection information, {N1, N2} set, power offset, codebook configuration, resource parameter, codebook subset restriction, RI restriction, or port number indication.

[0150] Clause 36. The method according to any one of Clauses 33 to 35, wherein the parameters related to time domain information or resources include at least one of the following: reportConfigType, list of reportConfigType, parameter set for periodic or semi-persistent reporting, or list indicating physical uplink control channel (PUCCH) resources for reporting.

[0151] Clause 37. The method according to any one of Clauses 33 to 36, wherein one or more CSI reports are sent in different PUCCH resources according to the parameters related to time domain information or resources.

[0152] Clause 38. The method according to any one of Clauses 22 to 37, wherein one or more CSI reports include a first CSI report and a second CSI report, wherein the first CSI report is based on first spatial and power information associated with M1 ports, and the second CSI report is based on second spatial and power information associated with M2 ports, where M1 < M2 and M1 and M2 are integers.

[0153] Clause 39. The method according to any one of Clauses 22 to 38, wherein one or more CSI reports include a first CSI report and a second CSI report, wherein the first CSI report does not include a precoding matrix indicator (PMI), and wherein the second CSI report includes the PMI.

[0154] Clause 40. The method according to any one of Clauses 22 to 39, wherein one or more CSI reports include a first CSI report and a second CSI report, wherein the first CSI report does not include a Rank Indicator (RI) or a PMI, and wherein the second CSI report includes both the RI and the PMI.

[0155] Clause 41. The method according to any one of Clauses 22 to 40, wherein one or more CSI reports include a first CSI report and a second CSI report, wherein the second CSI report does not include column index information, and wherein the first CSI report includes the column index information.

[0156] Clause 42. The method according to any one of Clauses 22 to 41, wherein one or more CSI reports include a first CSI report and a second CSI report, wherein the first CSI report includes a differential CQI, wherein the second CSI report includes a CQI, and wherein the differential CQI is based on the CQI in the second CSI report.

[0157] For example, the solutions listed below can be provided by devices (e.g., Figure 6 The device 605) or the computer-readable medium described herein.

[0158] Clause 43. An apparatus for wireless communication, comprising a processor configured to implement the method as described in any one of Clauses 1 to 42.

[0159] Clause 44. A computer-readable program storage medium having code stored thereon, which, when executed by a processor of a computer system, causes the computer system to perform the method as described in any one of Clauses 1 to 42.

[0160] Some embodiments described herein are described in the general context of a method or process that may be implemented in one embodiment by a computer program product contained in a computer-readable medium, the computer program product including computer-executable instructions such as program code that are executed by a computer in a networked environment. The computer-readable medium may include removable and non-removable storage devices, including but not limited to read-only memory (ROM), random access memory (RAM), optical disc (CD), digital versatile disc (DVD), etc. Therefore, the computer-readable medium may include non-transitory storage media. Typically, program modules may include routines, programs, objects, components, data structures, etc., that perform a particular task or implement a particular abstract data type. Computer or processor-executable instructions, associated data structures, and program modules represent examples of program code for performing steps of the methods disclosed herein. A particular sequence of such executable instructions or associated data structures represents examples of corresponding actions for implementing the functions described in these steps or processes.

[0161] Some of the disclosed embodiments can be implemented as devices or modules using hardware circuitry, software, or a combination thereof. For example, a hardware circuitry implementation may include discrete analog and / or digital components, which may be integrated, for example, as part of a printed circuit board. Alternatively or additionally, the disclosed components or modules may be implemented as application-specific integrated circuits (ASICs) and / or field-programmable gate arrays (FPGAs) devices. Additionally or alternatively, some embodiments may include a digital signal processor (DSP), which is a dedicated microprocessor with an architecture optimized for the operational needs of digital signal processing associated with the functionality disclosed in this application. Similarly, various components or sub-components within each module can be implemented using software, hardware, or firmware. Any connection method and medium known in the art can be used to provide connectivity between modules and / or components within modules, including but not limited to communication via the Internet, wired networks, or wireless networks using appropriate protocols.

[0162] While this document contains numerous details, these details should not be construed as limiting the scope of the claimed or potentially claimable invention, but rather as descriptions of features specific to particular embodiments. Certain features described herein in the context of individual embodiments may also be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment may also be implemented individually or in any suitable sub-combination in multiple embodiments. Furthermore, while features may be described above as acting in certain combinations and even initially claimed in this way, one or more features from the claimed combination may be removed from the combination in some cases, and the claimed combination may involve sub-combinations or variations thereof. Similarly, although operations are depicted in a specific order in the figures, this should not be construed as requiring such operations to be performed in the specific order shown or in a sequential order, or to perform all shown operations to achieve the desired result.

[0163] Unless the context explicitly requires it, the words “comprise”, “comprising”, etc., in the specification and claims should be interpreted in an inclusive sense, rather than an exclusive or exhaustive sense, meaning “including, but not limited to”. As used herein, the terms “connection,” “coupled,” or any variation thereof mean any direct or indirect connection or coupling between two or more elements; the coupling or connection between elements can be physical, logical, or a combination of both. Furthermore, when used in this application, the words “in this document,” “above,” “below,” and similar terms refer to the entire application and not any particular part of it. Where the context permits, the use of singular or plural forms may also include the plural or singular forms respectively. When the word “or” is used to list two or more items, it covers all the following interpretations of the word: any one item in the list, all items in the list, and any combination of items in the list. Similarly, when the term “and / or” is used to list two or more items, it covers all the following interpretations of the word: any one item in the list, all items in the list, and any combination of items in the list.

[0164] Unless otherwise specified, conjunctions such as "at least one of X, Y, and Z" are generally understood to mean, in the context of use, that an item, term, etc., can be X, Y, or Z, or any combination thereof. Therefore, such conjunctions are not generally intended to imply that some embodiments require the presence of at least one X, at least one Y, and at least one Z. Furthermore, the use of the phrase "at least one of X, Y, or Z," in its general usage, is to express that an item, term, etc., can be X, Y, or Z, or any combination thereof.

[0165] Only a few implementations and examples have been described, and other implementations, enhancements and variations may be made based on what is described and shown in this disclosure.

Claims

1. A wireless communication method, comprising: The wireless device receives control signaling, which includes a first channel state information (CSI) report configuration. and Send one or more CSI reports based on at least the configuration of the first CSI report to the network node; Wherein, the first CSI report configuration is associated with the second CSI report configuration; the first CSI report configuration configures a first parameter set, and wherein the second CSI report configuration associated with the first CSI report configuration is configured not to be included in the second parameter set of the first parameter set, and wherein the first CSI report configuration is not configured with parameters in the second parameter set; The method further includes: transmitting a second CSI report associated with the second CSI report configuration, T times before the time slot associated with the first CSI report associated with the first CSI report configuration, where T is a positive integer, wherein the wireless device does not transmit the first CSI report when T exceeds a threshold.

2. The method according to claim 1, wherein, The first CSI report configuration includes port selection information or power offset information.

3. The method according to claim 1, wherein, The first CSI report configuration includes a set {N1, N2}, where N1 is associated with the number of ports in the first direction and N2 is associated with the number of ports in the second direction, and where 2*N1*N2 is less than the total number of ports associated with the CSI-RS resources associated with the second CSI report configuration.

4. The method according to claim 1, wherein, The first CSI report configuration configures a first port set, wherein the second CSI report configuration configures a second port set, and wherein the first port set is a subset of the second port set.

5. The method according to claim 1, wherein, When the CSI report associated with the second CSI report configuration is not sent, the CSI report associated with the first CSI report configuration is also not sent.

6. The method according to claim 1, further comprising: Receive signaling, wherein the signaling is configured to indicate whether the CSI report configuration is a first CSI report configuration or a second CSI report configuration.

7. The method according to claim 1, wherein, The first parameter set includes at least one of the following: related indication, reportConfigType, pucch-CSI-ResourceList, parameter set for periodic or semi-persistent reporting, port selection indication, power offset indication, codebook configuration, codebook subset limitation, RI limitation, or port number indication.

8. The method according to claim 1, wherein, The indication in the first CSI report configuration is used to indicate the second CSI report configuration associated with the first CSI report configuration.

9. The method according to claim 1, wherein, The first CSI report configuration includes multiple parameters related to time-domain information or the resources that carry the one or more CSI reports.

10. The method according to claim 1 or 9, wherein, The first CSI report configuration includes at least one of the following spatial and power information: One or more port selection information; Multiple sets {N1, N2}, where N1 is associated with the number of ports in the first direction and N2 is associated with the number of ports in the second direction; Multiple codebook configurations; Multiple power offsets; Multiple codebook subset restrictions; Multiple resource parameters; Multiple rank indicator RI restrictions; or Multiple port quantity indications.

11. The method according to claim 9, wherein, Among the multiple parameters, the parameters related to the time domain information or the resources are associated with at least one of the following: port selection information, {N1, N2} set, power offset, codebook configuration, resource parameters, codebook subset restriction, RI restriction, or port quantity indication.

12. The method according to claim 9, wherein, The parameters related to the time domain information or the resources include at least one of the following: reportConfigType, list of reportConfigType, parameter set for periodic or semi-persistent reporting, or list indicating the physical uplink control channel PUCCH resources for reporting.

13. The method according to claim 9, wherein, Send the one or more CSI reports in different PUCCH resources according to the parameters related to the time domain information or the resources.

14. The method according to claim 1, wherein, The one or more CSI reports include a first CSI report and a second CSI report. Among them, the first CSI report is based on the first spatial and power information associated with M1 ports, and the second CSI report is based on the second spatial and power information associated with M2 ports, where M1 < M2, and M1 and M2 are integers.

15. The method according to claim 1, wherein, The one or more CSI reports include a first CSI report and a second CSI report. Among them, the first CSI report does not include a precoding matrix indicator PMI, and the second CSI report includes the PMI.

16. The method according to claim 1, wherein, The one or more CSI reports include a first CSI report and a second CSI report. Among them, the first CSI report does not include a rank indicator RI or PMI, and the second CSI report includes RI and PMI.

17. The method according to claim 1, wherein, The one or more CSI reports include a first CSI report and a second CSI report. Among them, the second CSI report does not include column index information, and the first CSI report includes the column index information.

18. The method according to claim 1, wherein, The one or more CSI reports include a first CSI report and a second CSI report. Among them, the first CSI report includes a differential CQI, and the second CSI report includes a CQI, where the differential CQI is based on the CQI in the second CSI report.

19. A wireless communication method, comprising: A network node transmits control signaling, and the control signaling includes a first channel state information CSI report configuration; and Receives from a wireless device one or more CSI reports based on at least the first CSI report configuration; wherein, the first CSI report configuration is associated with a second CSI report configuration; the first CSI report configuration configures a first parameter set, and the second CSI report configuration associated with the first CSI report configuration configures a second parameter set not included in the first parameter set, and the first CSI report configuration does not configure the parameters in the second parameter set. The method further includes: receiving a second CSI report associated with the second CSI report configuration, T times before the time slot associated with the first CSI report associated with the first CSI report configuration, where T is a positive integer, and wherein when T exceeds a threshold, the network node does not receive the first CSI report.

20. The method according to claim 19, wherein, The first CSI report configuration includes port selection information or power offset information.

21. The method according to claim 19, wherein, The first CSI report configuration includes a set {N1, N2}, where N1 is associated with the number of ports in the first direction and N2 is associated with the number of ports in the second direction, and where 2*N1*N2 is less than the total number of ports associated with the CSI-RS resources associated with the second CSI report configuration.

22. The method according to claim 19, wherein, When no CSI report associated with the second CSI report configuration is received, the network node does not receive the CSI report associated with the first CSI report configuration.

23. The method of claim 19, further comprising: Sending signaling, wherein the signaling is configured to indicate whether the CSI reporting configuration is the first CSI reporting configuration or the second CSI reporting configuration.

24. The method according to claim 19, wherein, The first parameter set includes at least one of the following: related indication, reportConfigType, pucch-CSI-ResourceList, parameter set for periodic or semi-persistent reporting, port selection indication, power offset indication, codebook configuration, codebook subset limitation, RI limitation, or port number indication.

25. The method according to claim 19, wherein, The indication in the first CSI report configuration is used to indicate the second CSI report configuration associated with the first CSI report configuration.

26. The method according to claim 19, wherein, The first CSI report configuration includes multiple parameters related to time-domain information or the resources that carry the one or more CSI reports.

27. The method according to claim 19 or 26, wherein, The first CSI report configuration includes at least one of the following spatial and power information: One or more port selection information; Multiple sets {N1, N2}, where N1 is associated with the number of ports in the first direction and N2 is associated with the number of ports in the second direction; Multiple codebook configurations; Multiple power offsets; Multiple codebook subset restrictions; Multiple resource parameters; Multiple rank indicator RI restrictions; or Indicator of the number of ports.

28. The method according to claim 26, wherein, The parameters relating to the time-domain information or the resources are associated with at least one of the following: port selection information, the {N1,N2} set, power offset, codebook configuration, resource parameters, codebook subset limitation, RI limitation, or port quantity indication.

29. The method according to claim 26, wherein, The one or more CSI reports are sent in different PUCCH resources based on parameters related to the time-domain information or the resource.

30. The method according to claim 19, wherein, The one or more CSI reports include a first CSI report and a second CSI report, wherein the second CSI report does not include column index information, and wherein the first CSI report includes the column index information.

31. The method according to claim 19, wherein, The one or more CSI reports include a first CSI report and a second CSI report, wherein the first CSI report includes a differential CQI, wherein the second CSI report includes a CQI, and wherein the differential CQI is based on the CQI in the second CSI report.

32. An apparatus for wireless communication, comprising a processor configured to implement the method as claimed in any one of claims 1 to 31.

33. A computer-readable program storage medium having code stored thereon, which, when executed by a processor of a computer system, causes the computer system to perform the method as described in any one of claims 1 to 31.

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