CN111435846B - Channel state information reporting method, terminal and network side equipment - Google Patents

Abstract

Embodiments of the present invention provide a method for reporting channel state information, a terminal, and a network-side device. The method includes: determining at least one target mapping mode in a first mapping mode, where the first mapping mode includes at least two mapping modes, where The mapping method is used to represent the mapping relationship between the codeword and the transmission layer; the channel state information CSI is calculated according to the target mapping method; and the CSI is reported to the network side device. The embodiment of the present invention performs CSI calculation and reporting by defining multiple mapping modes, and determining a target mapping mode among the multiple mapping modes. Therefore, in different transmission processes, different mapping methods can be used to calculate and report CSI, so that the flexibility of CSI reporting can be improved to support coordinated multi-point transmission.

Description

Method, terminal and network side device for reporting channel state information

technical field

The present invention relates to the field of communication technologies, and in particular, to a method, terminal and network side device for reporting channel state information.

Background technique

The feedback of Channel State Information (CSI) determines the performance of Multiple-Input Multiple-Output (MIMO) transmission, and thus plays a pivotal role in the entire MIMO design. In the Long Term Evolution (Long Term Evolution, LTE) system, a variety of different feedback types are defined in different standardized versions (Rel-8 to Rel-14) to support CSI channel information feedback of different MIMO transmission schemes. This design leads to fragmentation and complexity of different transmission schemes and information feedback. In order to avoid introducing multiple feedback types/sub-feedback types in the 5G system, consider designing a unified CSI feedback framework. The system design decouples CSI measurement and CSI feedback methods, separates measurement resources and measurement operations from specific reporting operations, and supports different MIMO transmission methods in a more flexible way in multiple scenarios and multiple frequency bands. In addition, for the emerging beam management requirements of the 5G system, information such as beam indication and corresponding Reference Signal Received Power (RSRP) needs to be reported.

In a New Radio (NR) system, CSI may include a Channel Quality Indicator (CQI), a Precoding Matrix Indicator (PMI), and a CSI Reference Signal (CSI-RS) resource indicator , a synchronization signal block resource indicator (Synchronization Signal and PBCH block resource indicator, SSBRI), a layer indicator (Layer Indicator, LI), a rank indicator (Rank indicator, RI), and L1-RSRP. Among them, SSBRI, LI and L1-RSRP are newly added feedback amounts based on the CSI feedback of the LTE system. LI is used to indicate the strongest column in the PMI for PT-RS reference signal mapping. SSBRI and L1-RSRP are used for beam management, one indicates beam index and the other indicates beam strength.

According to the above principle of decoupling CSI measurement and CSI feedback, the system will configure each terminal with N≥1 reporting settings (Reporting Settings) for reporting different measurement results, and M≥1 CSI-RS measurement resource settings (Resource Setting). Each Reporting Setting is associated with one or more Resource Retting for channel and interference measurement and reporting, so that different measurement sets and reporting combinations can be flexibly set according to different terminal requirements and application scenarios. For a certain terminal, two reporting settings are configured. For setting 0, the results of three measurement sets are reported, and for setting 1, the results of one measurement set are reported.

The reporting setting includes the configuration of the following parameters: CSI feedback parameter (report quantity), codebook configuration, time domain behavior of CSI feedback, frequency domain granularity of PMI and CQI, and measurement constraint configuration. The CSI feedback parameter is used to indicate whether the UE performs feedback related to beam management or feedback related to CSI acquisition.

Periodic, semi-persistent and aperiodic CSI feedback modes are supported in NR. For periodic and semi-persistent CSI feedback, the feedback period and feedback slot offset need to be configured in the reporting setting, and each reporting setting can be associated with one or two resource settings. For aperiodic CSI feedback, the feedback slot offset is indicated by dynamic signaling, and each Reporting setting can be associated with 1, 2 or 3 Resource settings.

Wideband or subband feedback is supported in NR. The size of the subband reported by the subband CSI is related to the bandwidth actually used by the terminal (Bandwidth Part, BWP), and the bandwidth (because the 5G system bandwidth is generally relatively wide, from the perspective of power saving, etc., the entire system bandwidth is usually divided into different sizes. BWP, transmit and receive within the BWP bandwidth allocated by each terminal), as shown in the following table. Each BWP configuration bandwidth includes two candidate subband sizes, which can be configured through radio resource control (RadioResource Control, RRC). When subband CSI is reported, multiple subbands may be configured continuously in the frequency domain, or may be configured discontinuously in the frequency domain.

The time domain behavior of CSI-RS in NR can be configured as periodic CSI-RS, semi-persistent CSI-RS and aperiodic CSI-RS.

The Resource setting is used for channel or interference measurements. Each resource setting includes S≥1 resource sets, and each resource set includes Ks≥1 CSI-RS resources. NR supports periodic, semi-persistent, and aperiodic resource settings, and its time-domain behavior is configured in the resource setting. For periodic and semi-persistent resource settings, only one resource set can be configured, that is, S=1. Aperiodic resource settings can configure one or more resource sets. In order to distinguish CSI acquisition and beam management, a beam repetition indication parameter repetition is also introduced, which is configured in the resource set to indicate that the CSI-RS in this resource set is used for beam management and whether to use repeated beam transmission.

In order to improve the coverage of the cell edge and provide a more balanced service quality in the service area, coordinated multi-point is an important technical means in the NR system. Considering the deployment conditions, frequency bands and antenna patterns of the NR system, the application of the coordinated multi-point transmission technology in the NR system has more significant practical significance. First of all, from the perspective of network form, network deployment in the form of a large number of distributed access points + baseband centralized processing will be more conducive to providing a balanced user experience rate, and significantly reduce the delay and signal transmission caused by handover. make overhead. With the increase of frequency bands, from the perspective of ensuring network coverage, relatively dense deployment of access points is also required. In the high frequency band, with the improvement of the integration degree of active antenna equipment, it will be more inclined to use a modular active antenna array. The antenna array of each Transmission Reception Point (TRP) can be divided into several relatively independent antenna sub-arrays (or antenna panel panels), so the shape and number of ports of the entire array can be adapted to the deployment scenarios and business requirements. Make flexible adjustments. The panels or TRPs can also be connected by optical fibers for more flexible distributed deployment. In the millimeter wave band, as the wavelength decreases, the blocking effect caused by obstacles such as human bodies or vehicles will become more pronounced. In this case, from the perspective of ensuring the robustness of the link connection, it is also possible to use the cooperation between multiple TRPs or panels to transmit/receive from multiple beams from multiple angles, thereby reducing the impact caused by the blocking effect. Negative Effects.

According to the mapping relationship of the transmitted signal flow to multiple TRPs/panels, the coordinated multi-point transmission technology can be roughly divided into two types: coherent and non-coherent transmission. Among them, during coherent transmission, each data layer is mapped to multiple TRP/panels through a weighted vector. In non-coherent transmission, each data stream is only mapped to part of the TRP/panel. Coherent transmission has higher requirements on the synchronization between transmission points and the transmission capability of backhaul, so it is more sensitive to many non-ideal factors in actual deployment conditions. Relatively speaking, non-coherent transmission is less affected by the above factors, so it is a key consideration in NR multipoint transmission technology.

Currently, when reporting CSI in single-point transmission, a fixed mapping method is usually used to calculate CSI, for example, CSI reporting is performed using the LET mapping method or the mapping method defined by Rel-15 in the NR system. This CSI reporting method is single, cannot support multi-point coordinated transmission well, and needs to be improved urgently.

SUMMARY OF THE INVENTION

Embodiments of the present invention provide a channel state information reporting method, a terminal, and a network side device, so as to solve the problem of a single channel state information reporting method.

In order to achieve the above purpose, an embodiment of the present invention provides a method for reporting channel state information, which is applied to a terminal, including:

determining at least one target mapping mode in the first mapping mode, the first mapping mode includes at least two mapping modes, and the mapping modes are used to represent the mapping relationship between the codeword and the transport layer;

Calculate channel state information CSI according to the target mapping method;

The CSI is reported to the network side device.

Optionally, the determining at least one target mapping manner in the first mapping manner includes any of the following:

The protocol pre-agrees that the target mapping mode is determined according to the mapping relationship between the layer number of the transport layer and the first mapping mode;

selecting the target mapping mode from the first mapping mode;

The target mapping mode is determined according to target information sent by the network-side device, where the target information is used to indicate the target mapping mode or a second mapping mode, and the second mapping mode is used for the terminal to select the target Mapping mode, the second mapping mode is at least two mapping modes in the first mapping mode.

Optionally, when the target mapping mode is selected from the first mapping mode, or when the target mapping mode is determined according to target information sent by the network side device, and the target information is used to indicate the first mapping mode. In the case of two mapping modes, the method further includes:

Send indication information to the network side device, where the indication information is used to indicate the target mapping mode.

Optionally, when reporting the CSI, it is assumed that a DMRS port group is used for transmission of the physical downlink shared channel PDSCH, or a channel state information reference signal resource is used when calculating the CSI. When the CSI-RS resource is used for channel measurement, the first mapping manner includes at least two of the following mapping manners:

The first sub-mapping mode defined by Rel-15 of the new air interface NR;

The second sub-mapping mode defined by Long Term Evolution LTE;

A predefined third sub-mapping mode, the third sub-mapping mode includes: when the number of transmission layers is N-4 layers, a single code is used, and N is an integer greater than 4 and less than 9; the number of transmission layers is N layers , both codeword 0 and codeword 1 are mapped to at least one transport layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and the sum of the layers of the transport layers corresponding to codeword 0 and codeword 1 is equal to N;

A predefined fourth sub-mapping mode, the fourth sub-mapping mode includes: when the number of transmission layers is 1, a single code is used; when the number of transmission layers is M, both codeword 0 and codeword 1 are mapped at least To a transport layer, there is no overlap between the layers corresponding to codeword 0 and codeword 1, and the sum of the layers of the transport layers corresponding to codeword 0 and codeword 1 is equal to M, where M is an integer greater than 1 and less than 9.

Optionally, when the first mapping mode includes the first target sub-mapping mode, and the transport layers are arranged in a preset order, the method further includes:

Sending the number of layers of the transport layer corresponding to each codeword to the network side device, so that the network side device can determine, according to the number of layers of the transport layer corresponding to each codeword, each codeword and the transport layer in the first target sub-mapping mode the mapping relationship;

Wherein, the first target sub-mapping mode is the third sub-mapping mode and/or the fourth sub-mapping mode.

Optionally, when the first mapping mode includes a first target sub-mapping mode, the method further includes:

Send the first target sub-mapping mode to the network side device for the network side device to determine the mapping relationship between each codeword and the transport layer in the first target sub-mapping mode; the first target sub-mapping mode is the The third sub-mapping mode and/or the fourth sub-mapping mode.

Optionally, when reporting the CSI, it is assumed that at least two DMRS port groups are used for transmission of PDSCH or when at least two CSI-RS resources are used for channel measurement when calculating the CSI, The first mapping manner includes the following at least two mapping manners:

The fifth sub-mapping method defined by Rel-15 of the new air interface NR;

The sixth sub-mapping mode defined by Long Term Evolution LTE;

A predefined seventh sub-mapping mode, the seventh sub-mapping mode includes: when the number of transmission layers is from 2 to 4 layers, a single code is used; when the number of transmission layers is N, codeword 0 and codeword 1 Both are mapped to at least one transmission layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and the sum of the number of layers of the transmission layers corresponding to codeword 0 and codeword 1 is equal to N, where N is greater than 4 and less than 9 the integer;

A predefined eighth sub-mapping mode, the eighth sub-mapping mode includes: when the number of transport layers is M, both codeword 0 and codeword 1 are mapped to at least one transport layer, and codeword 0 and codeword 1 correspond to There is no overlap between layers, and the sum of the number of layers of the transmission layers corresponding to codeword 0 and codeword 1 is equal to M, where M is an integer greater than 1 and less than 9.

Optionally, when the first mapping mode includes the seventh sub-mapping mode and/or the eighth sub-mapping mode, the transmission layer corresponding to each codeword is respectively mapped to a DMRS port group, or The channel corresponding to each codeword in transmission is obtained by measuring a CSI-RS resource respectively; each transmission layer is arranged in a preset order.

Optionally, when the first mapping mode includes the second target sub-mapping mode, the method further includes:

Send the second target sub-mapping mode to the network side device for the network side device to determine the mapping relationship between each codeword and the transport layer in the second target sub-mapping mode; the second target sub-mapping mode is the The seventh sub-mapping mode and/or the eighth sub-mapping mode.

Optionally, the CSI includes at least two rank indication RIs, and the sum of the at least two RIs is equal to the total number of layers of the transmission layer.

The embodiment of the present invention also provides a method for reporting channel state information, which is applied to a network side device, including:

Receive the channel state information CSI reported by the terminal, where the CSI is calculated and obtained by the terminal according to at least one target mapping manner, and the target mapping manner is determined according to at least two mapping manners in the first mapping manner.

Optionally, the manner in which the terminal determines the target includes any of the following:

The protocol pre-agrees that the target mapping mode is determined according to the mapping relationship between the layer number of the transport layer and the first mapping mode;

selecting the target mapping mode from the first mapping mode;

The target mapping mode is determined according to target information sent by the network-side device, where the target information is used to indicate the target mapping mode or a second mapping mode, and the second mapping mode is used for the terminal to select the target Mapping mode, the second mapping mode is at least two mapping modes in the first mapping mode.

Optionally, when the target mapping mode is selected from the first mapping mode, or when the target mapping mode is determined according to target information sent by the network side device, and the target information is used to indicate the first mapping mode. In the case of two mapping modes, the method further includes:

Receive indication information sent by the terminal, where the indication information is used to indicate the target mapping mode.

Optionally, when reporting the CSI, it is assumed that a DMRS port group is used for transmission of the physical downlink shared channel PDSCH, or a channel state information reference signal resource is used when calculating the CSI. When the CSI-RS resource is used for channel measurement, the first mapping manner includes at least two of the following mapping manners:

The first sub-mapping mode defined by Rel-15 of the new air interface NR;

The second sub-mapping mode defined by Long Term Evolution LTE;

A predefined third sub-mapping mode, the third sub-mapping mode includes: when the number of transmission layers is N-4 layers, a single code is used, and N is an integer greater than 4 and less than 9; the number of transmission layers is N layers , both codeword 0 and codeword 1 are mapped to at least one transport layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and the sum of the layers of the transport layers corresponding to codeword 0 and codeword 1 is equal to N;

A predefined fourth sub-mapping mode, the fourth sub-mapping mode includes: when the number of transmission layers is 1, a single code is used; when the number of transmission layers is M, both codeword 0 and codeword 1 are mapped at least To a transport layer, there is no overlap between the layers corresponding to codeword 0 and codeword 1, and the sum of the layers of the transport layers corresponding to codeword 0 and codeword 1 is equal to M, where M is an integer greater than 1 and less than 9.

Optionally, when the first mapping mode includes the first target sub-mapping mode, and the transport layers are arranged in a preset order, the method further includes:

receiving the number of layers of the transport layer corresponding to each codeword sent by the terminal;

Determine the mapping relationship between each codeword and the transmission layer in the first target sub-mapping mode according to the number of layers of the transmission layer corresponding to each codeword;

Wherein, the first target sub-mapping mode is the third sub-mapping mode and/or the fourth sub-mapping mode.

Optionally, when the first mapping mode includes a first target sub-mapping mode, the method further includes:

receiving the first target sub-mapping mode, where the first target sub-mapping mode is the third sub-mapping mode and/or the fourth sub-mapping mode;

Determine the mapping relationship between each codeword and the transmission layer in the first target sub-mapping manner.

Optionally, when reporting the CSI, it is assumed that at least two DMRS port groups are used for transmission of PDSCH or when at least two CSI-RS resources are used for channel measurement when calculating the CSI, The first mapping manner includes the following at least two mapping manners:

The fifth sub-mapping method defined by Rel-15 of the new air interface NR;

The sixth sub-mapping mode defined by Long Term Evolution LTE;

A predefined seventh sub-mapping mode, the seventh sub-mapping mode includes: when the number of transmission layers is from 2 to 4 layers, a single code is used; when the number of transmission layers is N, codeword 0 and codeword 1 Both are mapped to at least one transmission layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and the sum of the number of layers of the transmission layers corresponding to codeword 0 and codeword 1 is equal to N, where N is greater than 4 and less than 9 the integer;

A predefined eighth sub-mapping mode, the eighth sub-mapping mode includes: when the number of transport layers is M, both codeword 0 and codeword 1 are mapped to at least one transport layer, and codeword 0 and codeword 1 correspond to There is no overlap between layers, and the sum of the number of layers of the transmission layers corresponding to codeword 0 and codeword 1 is equal to M, where M is an integer greater than 1 and less than 9.

Optionally, when the first mapping mode includes the seventh sub-mapping mode and/or the eighth sub-mapping mode, the transmission layer corresponding to each codeword is respectively mapped to a DMRS port group, or The channel corresponding to each codeword in transmission is obtained by measuring a CSI-RS resource respectively; each transmission layer is arranged in a preset order.

Optionally, when the first mapping mode includes the second target sub-mapping mode, the method further includes:

receiving the second target sub-mapping mode sent by the terminal, where the second target sub-mapping mode is the seventh sub-mapping mode and/or the eighth sub-mapping mode;

Determine the mapping relationship between each codeword and the transmission layer in the second target sub-mapping manner.

Optionally, the CSI includes at least two rank indication RIs, and the sum of the at least two RIs is equal to the total number of layers of the transmission layer.

An embodiment of the present invention also provides a terminal, including:

a first determining module, configured to determine at least one target mapping mode in a first mapping mode, where the first mapping mode includes at least two mapping modes, and the mapping modes are used to represent the mapping relationship between the codeword and the transport layer;

a calculation module, configured to calculate the channel state information CSI according to the target mapping mode;

The first sending module is configured to report the CSI to the network side device.

The embodiment of the present invention also provides a network side device, which is characterized by comprising:

A receiving module, configured to receive channel state information CSI reported by the terminal, where the CSI is obtained by the terminal calculated according to at least one target mapping method, and the target mapping method is determined according to at least two mapping methods in the first mapping methods.

An embodiment of the present invention further provides a terminal, including: a transceiver, a memory, a processor, and a program stored in the memory and running on the processor, characterized in that:

The processor is configured to determine at least one target mapping mode in the first mapping mode, and calculate the channel state information CSI according to the target mapping mode; the first mapping mode includes at least two mapping modes, and the mapping modes are used for Indicates the mapping relationship between the codeword and the transport layer;

The transceiver is used for reporting the CSI to the network side device;

or,

The transceiver is configured to determine at least one target mapping mode in the first mapping mode, the first mapping mode includes at least two mapping modes, and the mapping modes are used to represent the mapping relationship between the codeword and the transmission layer;

Calculate channel state information CSI according to the target mapping method;

The CSI is reported to the network side device.

Optionally, the determining at least one target mapping manner in the first mapping manner includes any of the following:

The protocol pre-agrees that the target mapping mode is determined according to the mapping relationship between the layer number of the transport layer and the first mapping mode;

selecting the target mapping mode from the first mapping mode;

The target mapping mode is determined according to target information sent by the network-side device, where the target information is used to indicate the target mapping mode or a second mapping mode, and the second mapping mode is used for the terminal to select the target Mapping mode, the second mapping mode is at least two mapping modes in the first mapping mode.

Optionally, when the target mapping mode is selected from the first mapping mode, or when the target mapping mode is determined according to target information sent by the network side device, and the target information is used to indicate the first mapping mode. In the two-mapping mode, the transceiver is also used for:

Send indication information to the network side device, where the indication information is used to indicate the target mapping mode.

Optionally, when reporting the CSI, it is assumed that a DMRS port group is used for transmission of the physical downlink shared channel PDSCH, or a channel state information reference signal resource is used when calculating the CSI. When the CSI-RS resource is used for channel measurement, the first mapping manner includes at least two of the following mapping manners:

The first sub-mapping mode defined by Rel-15 of the new air interface NR;

The second sub-mapping mode defined by Long Term Evolution LTE;

A predefined third sub-mapping mode, the third sub-mapping mode includes: when the number of transmission layers is N-4 layers, a single code is used, and N is an integer greater than 4 and less than 9; the number of transmission layers is N layers , both codeword 0 and codeword 1 are mapped to at least one transport layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and the sum of the layers of the transport layers corresponding to codeword 0 and codeword 1 is equal to N;

A predefined fourth sub-mapping mode, the fourth sub-mapping mode includes: when the number of transmission layers is 1, a single code is used; when the number of transmission layers is M, both codeword 0 and codeword 1 are mapped at least To a transport layer, there is no overlap between the layers corresponding to codeword 0 and codeword 1, and the sum of the layers of the transport layers corresponding to codeword 0 and codeword 1 is equal to M, where M is an integer greater than 1 and less than 9.

Optionally, when reporting the CSI, it is assumed that at least two DMRS port groups are used for transmission of PDSCH or when at least two CSI-RS resources are used for channel measurement when calculating the CSI, The first mapping manner includes the following at least two mapping manners:

The fifth sub-mapping method defined by Rel-15 of the new air interface NR;

The sixth sub-mapping mode defined by Long Term Evolution LTE;

A predefined seventh sub-mapping mode, the seventh sub-mapping mode includes: when the number of transmission layers is from 2 to 4 layers, a single code is used; when the number of transmission layers is N, codeword 0 and codeword 1 Both are mapped to at least one transmission layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and the sum of the number of layers of the transmission layers corresponding to codeword 0 and codeword 1 is equal to N, where N is greater than 4 and less than 9 the integer;

A predefined eighth sub-mapping mode, the eighth sub-mapping mode includes: when the number of transport layers is M, both codeword 0 and codeword 1 are mapped to at least one transport layer, and codeword 0 and codeword 1 correspond to There is no overlap between layers, and the sum of the number of layers of the transmission layers corresponding to codeword 0 and codeword 1 is equal to M, where M is an integer greater than 1 and less than 9.

An embodiment of the present invention further provides a network-side device, including: a transceiver, a memory, a processor, and a program stored in the memory and running on the processor,

The transceiver is configured to receive the channel state information CSI reported by the terminal, where the CSI is calculated and obtained by the terminal according to at least one target mapping manner, and the target mapping manner is determined according to at least two mapping manners in the first mapping manner.

Optionally, when reporting the CSI, it is assumed that a DMRS port group is used for transmission of the physical downlink shared channel PDSCH, or a channel state information reference signal resource is used when calculating the CSI. When the CSI-RS resource is used for channel measurement, the first mapping manner includes at least two of the following mapping manners:

The first sub-mapping mode defined by Rel-15 of the new air interface NR;

The second sub-mapping mode defined by Long Term Evolution LTE;

A predefined third sub-mapping mode, the third sub-mapping mode includes: when the number of transmission layers is N-4 layers, a single code is used, and N is an integer greater than 4 and less than 9; the number of transmission layers is N layers , both codeword 0 and codeword 1 are mapped to at least one transport layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and the sum of the layers of the transport layers corresponding to codeword 0 and codeword 1 is equal to N;

A predefined fourth sub-mapping mode, the fourth sub-mapping mode includes: when the number of transmission layers is 1, a single code is used; when the number of transmission layers is M, both codeword 0 and codeword 1 are mapped at least To a transport layer, there is no overlap between the layers corresponding to codeword 0 and codeword 1, and the sum of the layers of the transport layers corresponding to codeword 0 and codeword 1 is equal to M, where M is an integer greater than 1 and less than 9.

Optionally, when reporting the CSI, it is assumed that at least two DMRS port groups are used for PDSCH transmission or when at least two CSI-RS resources are used for channel measurement when calculating the CSI, The first mapping manner includes the following at least two mapping manners:

The fifth sub-mapping method defined by Rel-15 of the new air interface NR;

The sixth sub-mapping mode defined by Long Term Evolution LTE;

A predefined seventh sub-mapping mode, the seventh sub-mapping mode includes: when the number of transmission layers is from 2 to 4 layers, a single code is used; when the number of transmission layers is N, codeword 0 and codeword 1 Both are mapped to at least one transport layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and the sum of the number of layers of the transport layers corresponding to codeword 0 and codeword 1 is equal to N, where N is greater than 4 and less than 9 the integer;

A predefined eighth sub-mapping mode, the eighth sub-mapping mode includes: when the number of transport layers is M, both codeword 0 and codeword 1 are mapped to at least one transport layer, and codeword 0 and codeword 1 correspond to There is no overlap between layers, and the sum of the number of layers of the transmission layers corresponding to codeword 0 and codeword 1 is equal to M, where M is an integer greater than 1 and less than 9.

Embodiments of the present invention further provide a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, implements the steps in the method for reporting channel state information on the terminal side provided by the embodiments of the present invention, or the When the program is executed by the processor, the steps in the method for reporting channel state information on the network side device side provided by the embodiment of the present invention are implemented.

The embodiment of the present invention performs CSI calculation and reporting by defining multiple mapping modes, and determining a target mapping mode among the multiple mapping modes. Therefore, in different transmission processes, different mapping methods can be used to calculate and report CSI, so that the flexibility of CSI reporting can be improved to support coordinated multi-point transmission.

Description of drawings

1 is a schematic diagram of a network structure to which an embodiment of the present invention can be applied;

2 is a schematic diagram of a method for reporting channel state information provided by an embodiment of the present invention;

3 is a schematic diagram of a transmission assumption for reporting CSI in a method for reporting channel state information provided by an embodiment of the present invention;

4 is a schematic diagram of a transmission assumption for reporting CSI in a method for reporting channel state information provided by an embodiment of the present invention;

5 is a schematic diagram of another method for reporting channel state information provided by an embodiment of the present invention;

6 is a structural diagram of a terminal provided by an embodiment of the present invention;

7 is a structural diagram of a network side device provided by an embodiment of the present invention;

8 is a structural diagram of another terminal provided by an embodiment of the present invention;

FIG. 9 is a structural diagram of another network side device provided by an embodiment of the present invention.

Detailed ways

In order to make the technical problems, technical solutions and advantages to be solved by the present invention more clear, the following will be described in detail with reference to the accompanying drawings and specific embodiments.

Referring to FIG. 1, FIG. 1 is a schematic diagram of a network structure to which an embodiment of the present invention can be applied. As shown in FIG. 1, it includes a terminal 11 and a network-side device 12, where the terminal 11 may be a user terminal (User Equipment, UE) or other terminals. Equipment, such as: mobile phone, tablet computer (Tablet Personal Computer), laptop computer (Laptop Computer), personal digital assistant (personal digital assistant, referred to as PDA), mobile Internet Device (Mobile InternetDevice, MID) or wearable device ( A terminal-side device such as a Wearable Device), it should be noted that the specific type of the terminal is not limited in the embodiment of the present invention. The network side device 12 refers to a base station or other device that directly controls the terminal on the network side. Specifically, the network-side device 12 may be a base station, such as a macro station, LTE eNB, 5G NR NB, etc.; the network-side device may also be a small station, such as a low power node (LPN: low power node), pico, femto, etc. A station, or a network-side device can be an access point (AP, access point); a base station can also be a central unit (CU, central unit) and multiple transmission reception points (TRP, Transmission Reception Point) that it manages and controls. network node. It should be noted that, in the embodiment of the present invention, the specific type of the network side device is not limited.

Please refer to FIG. 2. FIG. 2 is a flowchart of a method for reporting channel state information provided by an embodiment of the present invention. As shown in FIG. 2, the method for reporting channel state information is applied to a terminal, and includes the following steps:

Step 201: Determine at least one target mapping mode in a first mapping mode, where the first mapping mode includes at least two mapping modes, and the mapping modes are used to represent the mapping relationship between the codeword and the transport layer;

In the embodiment of the present invention, the specific definition of the above-mentioned first mapping mode may be set according to actual needs, for example, the mapping mode defined by Rel-15 of the new air interface NR may be included, and the mapping mode defined by Long Term Evolution (LTE) may also be included. In addition, It may also be other redefined mapping manners, which will be described in detail in the following embodiments.

The above-mentioned target mapping manners may be part or all of the first mapping manners, and specifically, may include one or more mapping manners, and the specific number is not further limited herein. The target mode refers to the mapping mode assumed by the terminal when calculating the CSI.

Step 202, calculating channel state information CSI according to the target mapping mode;

After the above-mentioned target mapping manner is determined, CSI may be estimated, and the parameters of the CSI may include one or more of CQI, PMI, CSI-RS resource indication, SSBRI, LI, RI, and L1-RSRP. Specifically, in this embodiment, different CSI may be obtained by calculation based on different target mapping manners.

Step 203, reporting the CSI to the network side device.

After the CSI is obtained by calculation, the CSI can be sent to the network side device, and the specific sending method can be set according to actual needs, which will not be further described here. Specifically, when there are at least two target mapping modes, the CSI may be calculated and obtained according to different target mapping modes can be reported.

The embodiment of the present invention performs CSI calculation and reporting by defining multiple mapping modes, and determining a target mapping mode among the multiple mapping modes. Therefore, in different transmission processes, different mapping methods can be used to calculate and report CSI, so that the flexibility of CSI reporting can be improved to support coordinated multi-point transmission.

It should be noted that the solution for determining the first target mapping mode can be set according to actual needs. For example, in this embodiment, the above step 201 includes:

The protocol pre-agrees that the target mapping mode is determined according to the mapping relationship between the layer number of the transport layer and the first mapping mode;

selecting the target mapping mode from the first mapping mode;

The target mapping mode is determined according to target information sent by the network-side device, where the target information is used to indicate the target mapping mode or a second mapping mode, and the second mapping mode is used for the terminal to select the target Mapping mode, the second mapping mode is at least two mapping modes in the first mapping mode.

Specifically, for solution 1: the protocol pre-stipulates that the target mapping mode is determined according to the mapping relationship between the number of layers of the transport layer and the first mapping mode. At this time, the number of codes is determined by the number of layers of the transport layer.

For solution 2, the target mapping mode is selected from the first mapping modes; at this time, the terminal can independently select the target mapping mode, and specific selection rules can be set according to actual needs, which will not be further described here.

For solution 3: the target mapping mode is determined according to the target information sent by the network side device. At this time, in one embodiment, the second mapping mode indicated by the target information is the target mapping mode; in another embodiment, the terminal may select some or all of the mapping modes as the target from the second mapping modes indicated by the target information mapping method.

In this embodiment, the above-mentioned target information may be configuration information or indication information, which is not further limited herein.

Specifically, after the target mapping mode is selected by the autonomous terminal, the terminal needs to report the selected target mapping mode to the network side device. Further, in this embodiment, when the target mapping mode is selected from the first mapping modes, or when the target mapping mode is determined according to the target information sent by the network side device, and the target information is used When indicating the second mapping manner, the method further includes:

Send indication information to the network side device, where the indication information is used to indicate the target mapping mode.

It should be noted that the above-mentioned first mapping manner includes many different types, which will be described in detail below.

In an optional embodiment, when reporting CSI, it is assumed that a demodulation reference signal (Demodulation Reference Signal, DMRS) port group is used for transmission of the physical downlink shared channel PDSCH or when calculating the CSI, the In the case where one channel state information reference signal resource CSI-RS resource is used to measure the channel, the above-mentioned first mapping manner includes the following at least two mapping manners:

The first sub-mapping mode defined by Rel-15 of the new air interface NR;

The second sub-mapping mode defined by Long Term Evolution LTE;

A predefined third sub-mapping mode, the third sub-mapping mode includes: when the number of transmission layers is N-4 layers, a single code is used, and N is an integer greater than 4 and less than 9; the number of transmission layers is N layers , both codeword 0 and codeword 1 are mapped to at least one transport layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and the sum of the layers of the transport layers corresponding to codeword 0 and codeword 1 is equal to N;

A predefined fourth sub-mapping mode, the fourth sub-mapping mode includes: when the number of transmission layers is 1, a single code is used; when the number of transmission layers is M, both codeword 0 and codeword 1 are mapped at least To a transport layer, there is no overlap between the layers corresponding to codeword 0 and codeword 1, and the sum of the layers of the transport layers corresponding to codeword 0 and codeword 1 is equal to M, where M is an integer greater than 1 and less than 9.

In this embodiment, the foregoing first sub-mapping manner may specifically be:

When Rank1-4 (that is, the number of layers in the transmission layer is from 1 to 4), a single codeword is used;

When rank5-8 (that is, the number of layers in the transmission layer is from 5 to 8), two codewords are used; among them,

At rank 5: codeword 0 is mapped to layers 0 and 1, and codeword 1 is mapped to layers 2, 3, and 4.

Rank 6: Codeword 0 is mapped to layers 0, 1, and 2, and codeword 1 is mapped to layers 3, 4, and 5.

For Rank7: codeword 0 is mapped to layers 0, 1, and 2, and codeword 1 is mapped to layers 3, 4, 5, and 6.

Rank 8: Codeword 0 is mapped to layers 0, 1, 2, and 3, and codeword 1 is mapped to layers 4, 5, 6, and 7.

The above-mentioned second sub-mapping manner may specifically be:

When Rank1, use a single codeword;

When Rank2-8, two code words are used; among them,

In Rank 2, codeword 0 is mapped to layer 0, and codeword 1 is mapped to layer 1.

In Rank 3, codeword 0 is mapped to layer 0, and codeword 1 is mapped to layers 1 and 2.

In Rank4, codeword 0 is mapped to layers 0 and 1, and codeword 1 is mapped to layers 2 and 3.

At rank 5, codeword 0 is mapped to layers 0 and 1, and codeword 1 is mapped to layers 2, 3, and 4.

In Rank 6, codeword 0 is mapped to layers 0, 1, and 2, and codeword 1 is mapped to layers 3, 4, and 5.

In Rank7, codeword 0 is mapped to layers 0, 1, and 2, and codeword 1 is mapped to layers 3, 4, 5, and 6.

In Rank 8, codeword 0 is mapped to layers 0, 1, 2, and 3, and codeword 1 is mapped to layers 4, 5, 6, and 7.

The above-mentioned third sub-mapping manner may be:

When Rank1-4, use a single codeword;

When rank5-8, two codewords are used; among them,

When rank 5: both codeword 0 and codeword 1 are mapped to at least one transmission layer, there is no overlap between the layers corresponding to codeword 0 and codeword 1, and the sum of the layers of the transmission layers corresponding to codeword 0 and codeword 1 equal to 5; for example, the combination of layers to which codeword 0 and codeword 1 are mapped may be {0,1 2 3 4}, {0 1,2 3 4}, {0 1 2,3 4}, or {0 1 2 3,4}, or some or all of them. Specifically, the set {0,1 2 3 4} indicates that codeword 0 is mapped to layer 0, and codeword 1 is mapped to layers 1, 2, 3, and 4, and the meanings expressed by other sets are not repeated here.

Rank 6: Both codeword 0 and codeword 1 are mapped to at least one transport layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and the sum of the layers of the transport layers corresponding to codeword 0 and codeword 1 equal to 6; for example, the combinations of layers to which codeword 0 and codeword 1 are mapped may be {0,1 2 3 4 5}, {0 1,2 3 4 5}, {0 1 2,3 4 5} , {0 1 2 3,4 5}, or {0 12 3 4,5}, or some or all of them.

Rank 7: Both codeword 0 and codeword 1 are mapped to at least one transmission layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and the sum of the layers of the transmission layers corresponding to codeword 0 and codeword 1 equals 7; for example, the combinations of layers to which codeword 0 and codeword 1 are mapped may be {0,1 2 3 4 5 6}, {0 1,2 3 4 5 6}, {0 1 2,3 4 5 6}, {0 1 2 3,4 56}, {0 1 2 3 4,5 6} or {0 1 2 3 4 5,6}, or some or all of these combinations.

Rank 8: Both codeword 0 and codeword 1 are mapped to at least one transport layer, there is no overlap between the layers corresponding to codeword 0 and codeword 1, and the sum of the layers of the transport layers corresponding to codeword 0 and codeword 1 equal to 8; for example, the combinations of layers to which codeword 0 and codeword 1 are mapped may be {0,1 2 3 4 5 6 7}, {0 1,2 3 4 5 6 7}, {0 1 2, 3 4 5 6 7}, {0 1 23,4 5 6 7}, {0 1 2 3 4,5 6 7} or {0 1 2 3 4 5,6 7}, {0 1 2 3 4 5 6 ,7}, or some or all of them may be combined.

The above-mentioned fourth sub-mapping manner may be:

When Rank1, use a single codeword;

When Rank2-8, two code words are used; among them,

In Rank 2: codeword 0 is mapped to layer 0, and codeword 1 is mapped to layer 1; or codeword 0 is mapped to layer 1, and codeword 1 is mapped to layer 0.

Rank 3: Both codeword 0 and codeword 1 are mapped to at least one transport layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and the sum of the layers of the transport layers corresponding to codeword 0 and codeword 1 equal to 3; for example, the combination of layers to which codeword 0 and codeword 1 are mapped may be {0,1 2}, {0 1,2}, or {0 2,1}, or some or all of them combination.

Rank 4: Both codeword 0 and codeword 1 are mapped to at least one transport layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and the sum of the layers of the transport layers corresponding to codeword 0 and codeword 1 is equal to 4; for example, the combination of layers to which codeword 0 and codeword 1 are mapped may be {0,1 2 3}, {0 1,2 3}, {0 1 2,3}, or one of them some or all combinations.

When rank 5: both codeword 0 and codeword 1 are mapped to at least one transmission layer, there is no overlap between the layers corresponding to codeword 0 and codeword 1, and the sum of the layers of the transmission layers corresponding to codeword 0 and codeword 1 equal to 5; for example, the combination of layers to which codeword 0 and codeword 1 are mapped may be {0,1 2 3 4}, {0 1,2 3 4}, {0 1 2,3 4}, or {0 1 2 3,4}, or some or all of them.

Rank 6: Both codeword 0 and codeword 1 are mapped to at least one transport layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and the sum of the layers of the transport layers corresponding to codeword 0 and codeword 1 equal to 6; for example, the combinations of layers to which codeword 0 and codeword 1 are mapped may be {0,1 2 3 4 5}, {0 1,2 3 4 5}, {0 1 2,3 4 5} , {0 1 2 3,4 5}, or {0 12 3 4,5}, or some or all of them.

Rank 7: Both codeword 0 and codeword 1 are mapped to at least one transmission layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and the sum of the layers of the transmission layers corresponding to codeword 0 and codeword 1 equals 7; for example, the combinations of layers to which codeword 0 and codeword 1 are mapped may be {0,1 2 3 4 5 6}, {0 1,2 3 4 5 6}, {0 1 2,3 4 5 6}, {0 1 2 3,4 56}, {0 1 2 3 4,5 6} or {0 1 2 3 4 5,6}, or some or all of these combinations.

Rank 8: Both codeword 0 and codeword 1 are mapped to at least one transport layer, there is no overlap between the layers corresponding to codeword 0 and codeword 1, and the sum of the layers of the transport layers corresponding to codeword 0 and codeword 1 is equal to 7; for example, the combinations of layers to which codeword 0 and codeword 1 are mapped may be {0,1 2 3 4 5 6 7}, {0 1,2 3 4 5 6 7}, {0 1 2, 3 4 5 6 7}, {0 1 23,4 5 6 7}, {0 1 2 3 4,5 6 7} or {0 1 2 3 4 5,6 7}, {0 1 2 3 4 5 6 ,7}, or some or all of them may be combined.

In this embodiment, as shown in FIG. 3 , it is assumed that only one DMRS portgroup is used for PDSCH transmission during CSI reporting, or only one CSI-RS resource is used for channel measurement when CSI is calculated. For example, it corresponds to the dynamic point switching (Dynamic Point Switching, DPS) transmission (one TRP/panel is dynamically selected) or only the single-point transmission using the currently connected TRP/panel.

It should be understood that the above-mentioned rank is the number of layers that can be used in the assumed PDSCH transmission when calculating CSI, and corresponds to the reported RI. The Rank does not exceed the upper limit of the terminal capability or the configuration on the network side.

Further, for the above-mentioned third sub-mapping mode and fourth sub-mapping mode, in the first embodiment, the assumed mapping relationship between each codeword and layer may be reported. Specifically, when the first mapping mode includes the first target sub-mapping mode, the method further includes:

Send the first target sub-mapping mode to the network side device for the network side device to determine the mapping relationship between each codeword and the transport layer in the first target sub-mapping mode; the first target sub-mapping mode is the The third sub-mapping mode and/or the fourth sub-mapping mode.

In the second embodiment, the assumed mapping relationship of each codeword to the layer may not be reported. Specifically, when the first mapping mode includes the first target sub-mapping mode, and the transport layers are arranged in a preset order, the method further includes:

Sending the number of layers of the transport layer corresponding to each codeword to the network side device, so that the network side device can determine, according to the number of layers of the transport layer corresponding to each codeword, each codeword and the transport layer in the first target sub-mapping mode The mapping relationship; wherein, the first target sub-mapping mode is the third sub-mapping mode and/or the fourth sub-mapping mode.

In this embodiment, if the terminal reports the number of layers of the transport layer corresponding to each codeword (the total number of layers may not be reported at this time)

For example, in rank2, the order of each transport layer is 0 1; in rank3, the order of each transport layer is 0 1 2; in rank4, the order of each transport layer is 0 1 2 3; in rank5, the order of each transport layer is 0 1 2 3 4; in rank6 The order of each transport layer is 0 1 2 34 5; the order of each transport layer in rank 7 is 0 1 2 3 4 5 6; the order of each transport layer in rank 8 is 0 1 2 3 4 5 6 7. When the number of layers such as the two reported codewords are RI-1 and RI-2 respectively (the sum of RI-1 and RI-2 is equal to rank), it can be considered that the mapping relationship between codewords and layers is: codeword 0 is mapped to the first RI-1 layers, and codeword 1 is mapped to the next RI-2 layers. At this time, it is not necessary to report the assumed correspondence between each codeword and layer.

In another optional embodiment, when reporting CSI, it is assumed that at least two DMRS portgroups are used for PDSCH transmission, or when the CSI is calculated, at least two CSI-RS resources are used for channel measurement , the first mapping mode includes the following at least two mapping modes:

The fifth sub-mapping method defined by Rel-15 of the new air interface NR;

The sixth sub-mapping mode defined by Long Term Evolution LTE;

A predefined seventh sub-mapping mode, the seventh sub-mapping mode includes: when the number of transmission layers is from 2 to 4 layers, a single code is used; when the number of transmission layers is N, codeword 0 and codeword 1 Both are mapped to at least one transmission layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and the sum of the number of layers of the transmission layers corresponding to codeword 0 and codeword 1 is equal to N, where N is greater than 4 and less than 9 the integer;

A predefined eighth sub-mapping mode, the eighth sub-mapping mode includes: when the number of transport layers is M, both codeword 0 and codeword 1 are mapped to at least one transport layer, and codeword 0 and codeword 1 correspond to There is no overlap between layers, and the sum of the number of layers of the transmission layers corresponding to codeword 0 and codeword 1 is equal to M, where M is an integer greater than 1 and less than 9.

In this embodiment, the fifth sub-mapping manner may specifically be:

When Rank2-4 (that is, the number of layers in the transmission layer is 2 to 4), a single codeword is used;

When rank5-8 (that is, the number of layers in the transmission layer is from 5 to 8), two codewords are used; among them,

At rank 5: codeword 0 is mapped to layers 0 and 1, and codeword 1 is mapped to layers 2, 3, and 4.

Rank 6: Codeword 0 is mapped to layers 0, 1, and 2, and codeword 1 is mapped to layers 3, 4, and 5.

For Rank7: codeword 0 is mapped to layers 0, 1, and 2, and codeword 1 is mapped to layers 3, 4, 5, and 6.

Rank 8: Codeword 0 is mapped to layers 0, 1, 2, and 3, and codeword 1 is mapped to layers 4, 5, 6, and 7.

The above sixth sub-mapping manner may specifically be:

When Rank2-8, two code words are used; among them,

In Rank 2, codeword 0 is mapped to layer 0, and codeword 1 is mapped to layer 1.

In Rank 3, codeword 0 is mapped to layer 0, and codeword 1 is mapped to layers 1 and 2.

In Rank4, codeword 0 is mapped to layers 0 and 1, and codeword 1 is mapped to layers 2 and 3.

At rank 5, codeword 0 is mapped to layers 0 and 1, and codeword 1 is mapped to layers 2, 3, and 4.

In Rank 6, codeword 0 is mapped to layers 0, 1, and 2, and codeword 1 is mapped to layers 3, 4, and 5.

In Rank7, codeword 0 is mapped to layers 0, 1, and 2, and codeword 1 is mapped to layers 3, 4, 5, and 6.

In Rank 8, codeword 0 is mapped to layers 0, 1, 2, and 3, and codeword 1 is mapped to layers 4, 5, 6, and 7.

The above seventh sub-mapping manner may be:

When Rank2-4, use a single codeword;

When rank5-8, two codewords are used; among them,

When rank 5: both codeword 0 and codeword 1 are mapped to at least one transmission layer, there is no overlap between the layers corresponding to codeword 0 and codeword 1, and the sum of the layers of the transmission layers corresponding to codeword 0 and codeword 1 equal to 5; for example, the combination of layers to which codeword 0 and codeword 1 are mapped may be {0,1 2 3 4}, {0 1,2 3 4}, {0 1 2,3 4}, or {0 1 2 3,4}, or some or all of them.

Rank 6: Both codeword 0 and codeword 1 are mapped to at least one transport layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and the sum of the layers of the transport layers corresponding to codeword 0 and codeword 1 equal to 6; for example, the combinations of layers to which codeword 0 and codeword 1 are mapped may be {0,1 2 3 4 5}, {0 1,2 3 4 5}, {0 1 2,3 4 5} , {0 1 2 3,4 5}, or {0 12 3 4,5}, or some or all of them.

Rank 7: Both codeword 0 and codeword 1 are mapped to at least one transmission layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and the sum of the layers of the transmission layers corresponding to codeword 0 and codeword 1 equals 7; for example, the combinations of layers to which codeword 0 and codeword 1 are mapped may be {0,1 2 3 4 5 6}, {0 1,2 3 4 5 6}, {0 1 2,3 4 5 6}, {0 1 2 3,4 56}, {0 1 2 3 4,5 6} or {0 1 2 3 4 5,6}, or some or all of these combinations.

Rank 8: Both codeword 0 and codeword 1 are mapped to at least one transport layer, there is no overlap between the layers corresponding to codeword 0 and codeword 1, and the sum of the layers of the transport layers corresponding to codeword 0 and codeword 1 equal to 8; for example, the combinations of layers to which codeword 0 and codeword 1 are mapped may be {0,1 2 3 4 5 6 7}, {0 1,2 3 4 5 6 7}, {0 1 2, 3 4 5 6 7}, {0 1 23,4 5 6 7}, {0 1 2 3 4,5 6 7} or {0 1 2 3 4 5,6 7}, {0 1 2 3 4 5 6 ,7}, or some or all of them may be combined.

The above-mentioned eighth sub-mapping manner may be:

When Rank2-8, two code words are used; among them,

In Rank 2: codeword 0 is mapped to layer 0, and codeword 1 is mapped to layer 1; or codeword 0 is mapped to layer 1, and codeword 1 is mapped to layer 0.

Rank 3: Both codeword 0 and codeword 1 are mapped to at least one transport layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and the sum of the layers of the transport layers corresponding to codeword 0 and codeword 1 equal to 3; for example, the combination of layers to which codeword 0 and codeword 1 are mapped may be {0,1 2}, {0 1,2}, or {0 2,1}, or some or all of them combination.

Rank 4: Both codeword 0 and codeword 1 are mapped to at least one transport layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and the sum of the layers of the transport layers corresponding to codeword 0 and codeword 1 is equal to 4; for example, the combination of layers to which codeword 0 and codeword 1 are mapped may be {0,1 2 3}, {0 1,2 3}, {0 1 2,3}, or one of them some or all combinations.

When rank 5: both codeword 0 and codeword 1 are mapped to at least one transmission layer, there is no overlap between the layers corresponding to codeword 0 and codeword 1, and the sum of the layers of the transmission layers corresponding to codeword 0 and codeword 1 equal to 5; for example, the combination of layers to which codeword 0 and codeword 1 are mapped may be {0,1 2 3 4}, {0 1,2 3 4}, {0 1 2,3 4}, or {0 1 2 3,4}, or some or all of them.

Rank 6: Both codeword 0 and codeword 1 are mapped to at least one transport layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and the sum of the layers of the transport layers corresponding to codeword 0 and codeword 1 equal to 6; for example, the combinations of layers to which codeword 0 and codeword 1 are mapped may be {0,1 2 3 4 5}, {0 1,2 3 4 5}, {0 1 2,3 4 5} , {0 1 2 3,4 5}, or {0 12 3 4,5}, or some or all of them.

Rank 7: Both codeword 0 and codeword 1 are mapped to at least one transmission layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and the sum of the layers of the transmission layers corresponding to codeword 0 and codeword 1 equals 7; for example, the combinations of layers to which codeword 0 and codeword 1 are mapped may be {0,1 2 3 4 5 6}, {0 1,2 3 4 5 6}, {0 1 2,3 4 5 6}, {0 1 2 3,4 56}, {0 1 2 3 4,5 6} or {0 1 2 3 4 5,6}, or some or all of these combinations.

Rank 8: Both codeword 0 and codeword 1 are mapped to at least one transport layer, there is no overlap between the layers corresponding to codeword 0 and codeword 1, and the sum of the layers of the transport layers corresponding to codeword 0 and codeword 1 is equal to 7; for example, the combinations of layers to which codeword 0 and codeword 1 are mapped may be {0,1 2 3 4 5 6 7}, {0 1,2 3 4 5 6 7}, {0 1 2, 3 4 5 6 7}, {0 1 23,4 5 6 7}, {0 1 2 3 4,5 6 7} or {0 1 2 3 4 5,6 7}, {0 1 2 3 4 5 6 ,7}, or some or all of them may be combined.

It should be understood that the above-mentioned rank is the total number of layers that can be used in the assumed PDSCH transmission when calculating the CSI, and corresponds to the sum of the reported values of two or more RIs. The Rank does not exceed the upper limit configured by the UE capability or the network side. The number of DMRS ports used by the PDSCH in each DMRS port group is equal to the value of the corresponding RI; or, each RI corresponds to a CSI-RS resource when measuring a channel.

In this embodiment, as shown in FIG. 4 , it is assumed that more than one DMRSport group is used for PDSCH transmission during CSI reporting, or more than one CSI-RS resource is used for channel measurement when CSI is measured. For example, corresponding to non-coherent joint transmission (Non-Coherent Joint Transmission, NC-JT) transmission using more than one TRP/panel, the rank is at least 2 at this time.

Further, for the seventh sub-mapping manner and the eighth sub-mapping manner, in the first embodiment, the assumed mapping relationship between each codeword and layer may be reported. Specifically, when the first mapping manner includes the second target sub-mapping manner, the method further includes:

Send the second target sub-mapping mode to the network side device for the network side device to determine the mapping relationship between each codeword and the transport layer in the second target sub-mapping mode; the second target sub-mapping mode is the The seventh sub-mapping mode and/or the eighth sub-mapping mode.

It should be noted that, in this embodiment, the CSI includes at least two rank indication RIs, and the sum of the at least two RIs is equal to the total number of layers of the transmission layer.

In the second embodiment, the assumed mapping relationship of each codeword to the layer may not be reported. Specifically, when the first mapping mode includes the seventh sub-mapping mode and/or the eighth sub-mapping mode, the transmission layer corresponding to each codeword is respectively mapped to a DMRS port group, or each Channels corresponding to each codeword in transmission are obtained by measuring one CSI-RS resource respectively; each transmission layer is arranged in a preset order.

For example, in rank2, the order of each transport layer is 0 1; in rank3, the order of each transport layer is 0 1 2; in rank4, the order of each transport layer is 0 1 2 3; in rank5, the order of each transport layer is 0 1 2 3 4; in rank6 The order of each transport layer is 0 1 2 34 5; the order of each transport layer in rank 7 is 0 1 2 3 4 5 6; the order of each transport layer in rank 8 is 0 1 2 3 4 5 6 7. When the number of layers such as the two reported codewords are RI-1 and RI-2 respectively (the sum of RI-1 and RI-2 is equal to rank), it can be considered that the mapping relationship between codewords and layers is: codeword 0 is mapped to the first RI-1 layers, and codeword 1 is mapped to the next RI-2 layers. At this time, it is not necessary to report the assumed correspondence between each codeword and layer.

It should be noted that, in this embodiment, the CSI may include at least two rank indication RIs, and the sum of the at least two RIs is equal to the total number of layers of the transmission layer. In other embodiments, the RI in the CSI may also only be used to indicate the total number of layers.

In order to better understand the present invention, two different reporting methods of CSI are described in detail below:

Reporting mode 1: As shown in FIG. 3 , it is assumed that only one DMRS portgroup is used for PDSCH transmission during CSI reporting, or only one CSI-RS resource is used for channel measurement when CSI is calculated. For example, corresponding to DPS transmission (one TRP/panel is dynamically selected) or single-point transmission using only the currently accessed TRP/panel.

In this case, when CSI is reported, the number of codewords used for PDSCH transmission and the mapping method of codewords to layers can be assumed.

Assumption 1: According to a pre-agreed mapping method (the number of codewords and the mapping method are determined by the number of layers), the specific mapping method specifically includes at least one of the following four mapping methods:

Mapping mode 1 is the mapping mode of NR Rel-15, which can be specifically:

When Rank1-4 (that is, the number of layers in the transmission layer is from 1 to 4), a single codeword is used;

When rank5-8 (that is, the number of layers in the transmission layer is from 5 to 8), two codewords are used; among them,

At rank 5: codeword 0 is mapped to layers 0 and 1, and codeword 1 is mapped to layers 2, 3, and 4.

Rank 6: Codeword 0 is mapped to layers 0, 1, and 2, and codeword 1 is mapped to layers 3, 4, and 5.

For Rank7: codeword 0 is mapped to layers 0, 1, and 2, and codeword 1 is mapped to layers 3, 4, 5, and 6.

Rank 8: Codeword 0 is mapped to layers 0, 1, 2, and 3, and codeword 1 is mapped to layers 4, 5, 6, and 7.

Mapping mode 2 is the mapping mode of LTE, which may be specifically:

When Rank1, use a single codeword;

When Rank2-8, two code words are used; among them,

In Rank 2, codeword 0 is mapped to layer 0, and codeword 1 is mapped to layer 1.

In Rank 3, codeword 0 is mapped to layer 0, and codeword 1 is mapped to layers 1 and 2.

In Rank4, codeword 0 is mapped to layers 0 and 1, and codeword 1 is mapped to layers 2 and 3.

At rank 5, codeword 0 is mapped to layers 0 and 1, and codeword 1 is mapped to layers 2, 3, and 4.

In Rank 6, codeword 0 is mapped to layers 0, 1, and 2, and codeword 1 is mapped to layers 3, 4, and 5.

In Rank7, codeword 0 is mapped to layers 0, 1, and 2, and codeword 1 is mapped to layers 3, 4, 5, and 6.

In Rank 8, codeword 0 is mapped to layers 0, 1, 2, and 3, and codeword 1 is mapped to layers 4, 5, 6, and 7.

Mapping mode 3 can be specifically:

When Rank1-4, use a single codeword;

When rank5-8, two codewords are used; among them,

When rank 5: The combination of layers to which codeword 0 and codeword 1 are mapped may be {0,1 2 3 4}, {0 1,2 34}, {0 1 2,3 4} or {0 1 2 3 ,4}, or some or all of them may be combined. It can also be other mappings that meet the following conditions: both codeword 0 and codeword 1 are mapped to at least one transmission layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and codeword 0 and codeword 1 correspond to the layer. The sum of the layers of the transport layer is equal to 5.

Rank6: The combination of layers to which codeword 0 and codeword 1 are mapped may be {0,1 2 3 4 5}, {0 1,2 34 5}, {0 1 2,3 4 5}, {0 1 2 3,4 5} or {0 1 2 3 4,5}, or some or all of them. It can also be other mappings that meet the following conditions: both codeword 0 and codeword 1 are mapped to at least one transmission layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and codeword 0 and codeword 1 correspond to the layer. The sum of the layers of the transport layer is equal to 6.

Rank7: The combination of layers to which codeword 0 and codeword 1 are mapped may be {0,1 2 3 4 5 6}, {0 1,23 4 5 6}, {0 1 2,3 4 5 6} , {0 1 2 3,4 5 6}, {0 1 2 3 4,5 6}, or {0 1 2 3 4 5,6}, or some or all of these combinations. It can also be other mappings that meet the following conditions: both codeword 0 and codeword 1 are mapped to at least one transmission layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and codeword 0 and codeword 1 correspond to the layer. The sum of the layers of the transport layer is equal to 7.

Rank8: The combination of layers to which codeword 0 and codeword 1 are mapped may be {0,1 2 3 4 5 6 7}, {0 1,2 3 4 5 6 7}, {0 1 2,3 4 5 6 7}, {0 1 2 3,4 5 6 7}, {0 1 2 3 4,5 6 7} or {0 1 2 34 5,6 7}, {0 1 2 3 4 5 6,7 }, or some or all of them may be combined. It can also be other mappings that meet the following conditions: both codeword 0 and codeword 1 are mapped to at least one transmission layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and codeword 0 and codeword 1 correspond to the layer. The sum of the layers of the transport layer is equal to 8.

Mapping mode 4 can be specifically:

When Rank1, use a single codeword;

When Rank2-8, two code words are used; among them,

Rank 2: Codeword 0 is mapped to layer 0, and codeword 1 is mapped to layer 1.

Rank 3: The combination of layers to which codeword 0 and codeword 1 are mapped may be {0,1 2}, {0 1,2}, or {0 2,1}, or some or all of them. It can also be other mappings that meet the following conditions: both codeword 0 and codeword 1 are mapped to at least one transmission layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and codeword 0 and codeword 1 correspond to the layer. The sum of the layers of the transport layer is equal to 3.

Rank4: The combination of layers to which codeword 0 and codeword 1 are mapped may be {0,1 2 3}, {0 1,2 3} or {01 2,3}, or some or all of them combination. It can also be other mappings that meet the following conditions: both codeword 0 and codeword 1 are mapped to at least one transmission layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and codeword 0 and codeword 1 correspond to the layer. The sum of the layers of the transport layer is equal to 4.

When rank 5: The combination of layers to which codeword 0 and codeword 1 are mapped may be {0,1 2 3 4}, {0 1,2 34}, {0 1 2,3 4} or {0 1 2 3 ,4}, or some or all of them may be combined. It can also be other mappings that meet the following conditions: both codeword 0 and codeword 1 are mapped to at least one transmission layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and codeword 0 and codeword 1 correspond to the layer. The sum of the layers of the transport layer is equal to 5.

Rank6: The combination of layers to which codeword 0 and codeword 1 are mapped may be {0,1 2 3 4 5}, {0 1,2 34 5}, {0 1 2,3 4 5}, {0 1 2 3,4 5} or {0 1 2 3 4,5}, or some or all of them. It can also be other mappings that meet the following conditions: both codeword 0 and codeword 1 are mapped to at least one transmission layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and codeword 0 and codeword 1 correspond to the layer. The sum of the layers of the transport layer is equal to 6.

Rank7: The combination of layers to which codeword 0 and codeword 1 are mapped may be {0,1 2 3 4 5 6}, {0 1,23 4 5 6}, {0 1 2,3 4 5 6} , {0 1 2 3,4 5 6}, {0 1 2 3 4,5 6}, or {0 1 2 3 4 5,6}, or some or all of these combinations. It can also be other mappings that meet the following conditions: both codeword 0 and codeword 1 are mapped to at least one transmission layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and codeword 0 and codeword 1 correspond to the layer. The sum of the layers of the transport layer is equal to 7.

Rank8: The combination of layers to which codeword 0 and codeword 1 are mapped may be {0,1 2 3 4 5 6 7}, {0 1,2 3 4 5 6 7}, {0 1 2,3 4 5 6 7}, {0 1 2 3,4 5 6 7}, {0 1 2 3 4,5 6 7} or {0 1 2 34 5,6 7}, {0 1 2 3 4 5 6,7 }, or some or all of them may be combined. It can also be other mappings that meet the following conditions: both codeword 0 and codeword 1 are mapped to at least one transmission layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and codeword 0 and codeword 1 correspond to the layer. The sum of the layers of the transport layer is equal to 8.

Assumption 2: Assumptions are made according to the mapping mode selected by the terminal.

Specifically, the terminal may select one or more of the following modes: mapping mode 1, mapping mode 2, mapping mode 3, and mapping mode 4. For example, the terminal may select one or all of the following modes: mapping mode 1 and mapping mode 2.

In this hypothetical solution, the terminal reports to the network-side device the mapping method assumed when it calculates the CSI.

Assumption 3: Assumptions are made according to the mapping method configured/instructed on the network side. For example, the network side may configure/instruct the terminal through signaling to use one or more of the following methods (or some of the methods) as the assumptions used when it calculates CSI: mapping mode 1, mapping mode 2, mapping mode 3, and mapping mode Way 4.

Assumption 4: The network side device instructs the terminal to select by itself.

The network-side device may configure/instruct the terminal to use one or all of the following methods as the assumption used when calculating the CSI: mapping mode 1, mapping mode 2, mapping mode 3, and mapping mode 4 through signaling.

It should be noted that, in the reporting method 1: the above-mentioned rank is the number of layers that can be used in the assumed PDSCH transmission when calculating the CSI, and corresponds to the reported RI. The Rank does not exceed the upper limit configured by the UE capability or the network side.

For the mapping mode 1 and the mapping mode 2, in an optional implementation scheme, it is also necessary to report the assumed correspondence between each codeword and the layer. In another optional implementation solution, if the terminal reports the number of layers corresponding to each codeword (the total number of layers may not be reported at this time), and the layers are arranged in a fixed order, it does not need to report its assumptions The correspondence between each codeword and layer.

Reporting mode 2: As shown in FIG. 4 , it is assumed that more than one DMRS portgroup is used for PDSCH transmission during CSI reporting, or more than one CSI-RS resource is used for channel measurement when CSI is measured. For example, corresponding to NC-JT transmission using more than one TRP/panel, the rank is at least 2.

In this case, when CSI is reported, the following assumptions can be made about the codeword-to-layer mapping method used for PDSCH transmission:

Assumption 5: According to the pre-agreed mapping method (the number of codewords and the mapping method are determined by the number of layers), the specific mapping method specifically includes at least one of the following four mapping methods:

Mapping mode 5 is the mapping mode of NR Rel-15, which can be specifically:

When Rank2-4, use a single codeword;

When rank5-8, two codewords are used; among them,

At rank 5: codeword 0 is mapped to layers 0 and 1, and codeword 1 is mapped to layers 2, 3, and 4.

Rank 6: Codeword 0 is mapped to layers 0, 1, and 2, and codeword 1 is mapped to layers 3, 4, and 5.

For Rank7: codeword 0 is mapped to layers 0, 1, and 2, and codeword 1 is mapped to layers 3, 4, 5, and 6.

Rank 8: Codeword 0 is mapped to layers 0, 1, 2, and 3, and codeword 1 is mapped to layers 4, 5, 6, and 7.

Mapping mode 6 is the mapping mode of LTE, which may be specifically:

When Rank2-8, two code words are used; among them,

In Rank 2, codeword 0 is mapped to layer 0, and codeword 1 is mapped to layer 1.

In Rank 3, codeword 0 is mapped to layer 0, and codeword 1 is mapped to layers 1 and 2.

In Rank4, codeword 0 is mapped to layers 0 and 1, and codeword 1 is mapped to layers 2 and 3.

At rank 5, codeword 0 is mapped to layers 0 and 1, and codeword 1 is mapped to layers 2, 3, and 4.

In Rank 6, codeword 0 is mapped to layers 0, 1, and 2, and codeword 1 is mapped to layers 3, 4, and 5.

In Rank7, codeword 0 is mapped to layers 0, 1, and 2, and codeword 1 is mapped to layers 3, 4, 5, and 6.

In Rank 8, codeword 0 is mapped to layers 0, 1, 2, and 3, and codeword 1 is mapped to layers 4, 5, 6, and 7.

Mapping mode 7 can be specifically:

When Rank2-4, use a single codeword;

When rank5-8, two codewords are used; among them,

When rank 5: The combination of layers to which codeword 0 and codeword 1 are mapped may be {0,1 2 3 4}, {0 1,2 34}, {0 1 2,3 4} or {0 1 2 3 ,4}, or some or all of them may be combined. It can also be other mappings that meet the following conditions: both codeword 0 and codeword 1 are mapped to at least one transmission layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and codeword 0 and codeword 1 correspond to the layer. The sum of the layers of the transport layer is equal to 5.

Rank6: The combination of layers to which codeword 0 and codeword 1 are mapped may be {0,1 2 3 4 5}, {0 1,2 34 5}, {0 1 2,3 4 5}, {0 1 2 3,4 5} or {0 1 2 3 4,5}, or some or all of them. It can also be other mappings that meet the following conditions: both codeword 0 and codeword 1 are mapped to at least one transmission layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and codeword 0 and codeword 1 correspond to the layer. The sum of the layers of the transport layer is equal to 6.

Rank7: The combination of layers to which codeword 0 and codeword 1 are mapped may be {0,1 2 3 4 5 6}, {0 1,23 4 5 6}, {0 1 2,3 4 5 6} , {0 1 2 3,4 5 6}, {0 1 2 3 4,5 6}, or {0 1 2 3 4 5,6}, or some or all of these combinations. It can also be other mappings that meet the following conditions: both codeword 0 and codeword 1 are mapped to at least one transmission layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and codeword 0 and codeword 1 correspond to the layer. The sum of the layers of the transport layer is equal to 7.

Rank8: The combination of layers to which codeword 0 and codeword 1 are mapped may be {0,1 2 3 4 5 6 7}, {0 1,2 3 4 5 6 7}, {0 1 2,3 4 5 6 7}, {0 1 2 3,4 5 6 7}, {0 1 2 3 4,5 6 7} or {0 1 2 34 5,6 7}, {0 1 2 3 4 5 6,7 }, or some or all of them may be combined. It can also be other mappings that meet the following conditions: both codeword 0 and codeword 1 are mapped to at least one transmission layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and codeword 0 and codeword 1 correspond to the layer. The sum of the layers of the transport layer is equal to 8.

The mapping method 8 can be specifically:

When Rank2-8, two code words are used; among them,

Rank 2: Codeword 0 is mapped to layer 0, and codeword 1 is mapped to layer 1.

Rank 3: The combination of layers to which codeword 0 and codeword 1 are mapped may be {0,1 2}, {0 1,2}, or {0 2,1}, or some or all of them. It can also be other mappings that meet the following conditions: both codeword 0 and codeword 1 are mapped to at least one transmission layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and codeword 0 and codeword 1 correspond to the layer. The sum of the layers of the transport layer is equal to 3.

Rank4: The combination of layers to which codeword 0 and codeword 1 are mapped may be {0,1 2 3}, {0 1,2 3} or {01 2,3}, or some or all of them combination. It can also be other mappings that meet the following conditions: both codeword 0 and codeword 1 are mapped to at least one transmission layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and codeword 0 and codeword 1 correspond to the layer. The sum of the layers of the transport layer is equal to 4.

When rank 5: The combination of layers to which codeword 0 and codeword 1 are mapped may be {0,1 2 3 4}, {0 1,2 34}, {0 1 2,3 4} or {0 1 2 3 ,4}, or some or all of them may be combined. It can also be other mappings that meet the following conditions: both codeword 0 and codeword 1 are mapped to at least one transmission layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and codeword 0 and codeword 1 correspond to the layer. The sum of the layers of the transport layer is equal to 5.

Rank6: The combination of layers to which codeword 0 and codeword 1 are mapped may be {0,1 2 3 4 5}, {0 1,2 34 5}, {0 1 2,3 4 5}, {0 1 2 3,4 5} or {0 1 2 3 4,5}, or some or all of them. It can also be other mappings that meet the following conditions: both codeword 0 and codeword 1 are mapped to at least one transmission layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and codeword 0 and codeword 1 correspond to the layer. The sum of the layers of the transport layer is equal to 6.

Rank7: The combination of layers to which codeword 0 and codeword 1 are mapped may be {0,1 2 3 4 5 6}, {0 1,23 4 5 6}, {0 1 2,3 4 5 6} , {0 1 2 3,4 5 6}, {0 1 2 3 4,5 6}, or {0 1 2 3 4 5,6}, or some or all of these combinations. It can also be other mappings that meet the following conditions: both codeword 0 and codeword 1 are mapped to at least one transmission layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and codeword 0 and codeword 1 correspond to the layer. The sum of the layers of the transport layer is equal to 7.

Rank8: The combination of layers to which codeword 0 and codeword 1 are mapped may be {0,1 2 3 4 5 6 7}, {0 1,2 3 4 5 6 7}, {0 1 2,3 4 5 6 7}, {0 1 2 3,4 5 6 7}, {0 1 2 3 4,5 6 7} or {0 1 2 34 5,6 7}, {0 1 2 3 4 5 6,7 }, or some or all of them may be combined. It can also be other mappings that meet the following conditions: both codeword 0 and codeword 1 are mapped to at least one transmission layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and codeword 0 and codeword 1 correspond to the layer. The sum of the layers of the transport layer is equal to 8.

Assumption 2: Assumptions are made according to the mapping mode selected by the terminal.

Specifically, the terminal may select one or more of the following modes: mapping mode 1, mapping mode 2, mapping mode 3, and mapping mode 4. For example, the terminal may select one or all of the following modes: mapping mode 1 and mapping mode 2.

In this hypothetical solution, the terminal reports to the network-side device the mapping method assumed when it calculates the CSI.

Assumption 3: Assumptions are made according to the mapping method configured/instructed on the network side. For example, the network side may configure/instruct the terminal through signaling to use one or more of the following methods (or some of the methods) as the assumptions used when it calculates CSI: mapping mode 1, mapping mode 2, mapping mode 3, and mapping mode Way 4.

Assumption 4: The network side device instructs the terminal to select by itself.

The network-side device may configure/instruct the terminal to use one or all of the following methods as the assumption used when calculating the CSI: mapping mode 1, mapping mode 2, mapping mode 3, and mapping mode 4 through signaling.

It should be noted that, in the reporting method 2: the above-mentioned rank is the number of layers that can be used in the assumed PDSCH transmission when calculating the CSI, and corresponds to the reported RI. The Rank does not exceed the upper limit configured by the UE capability or the network side. The number of DMRS ports used by the PDSCH in each DMRS port group is equal to the value of the corresponding RI; or, each RI corresponds to a CSI-RS resource when measuring a channel.

For the mapping mode 1 and the mapping mode 2, in an optional implementation scheme, it is also necessary to report the assumed correspondence between each codeword and the layer. In another alternative implementation,

According to the prior agreement or according to the protocol, it can be assumed that the layer corresponding to each codeword is mapped to a DMRS port group, or it can be assumed that the channel corresponding to each codeword in transmission passes through a CSI-RS. Resource measurement is obtained, and each layer is arranged in a fixed order, it is not necessary to report the assumed correspondence between each codeword and layer.

For example, in rank2, the order of each transport layer is 0 1; in rank3, the order of each transport layer is 0 1 2; in rank4, the order of each transport layer is 0 1 2 3; in rank5, the order of each transport layer is 0 1 2 3 4; in rank6 The order of each transport layer is 0 1 2 34 5; the order of each transport layer in rank 7 is 0 1 2 3 4 5 6; the order of each transport layer in rank 8 is 0 1 2 3 4 5 6 7. When the number of layers such as the two reported codewords are RI-1 and RI-2 respectively (the sum of RI-1 and RI-2 is equal to rank), it can be considered that the mapping relationship between codewords and layers is: codeword 0 is mapped to the first RI-1 layers, and codeword 1 is mapped to the next RI-2 layers. At this time, it is not necessary to report the assumed correspondence between each codeword and layer.

Please refer to FIG. 5. FIG. 5 is a flowchart of a method for reporting channel state information provided by an embodiment of the present invention. As shown in FIG. 5, the method is applied to a network side device and includes the following steps:

Step 501: Receive channel state information CSI reported by a terminal, where the CSI is calculated and obtained by the terminal according to at least one target mapping manner, and the target mapping manner is determined according to at least two mapping manners in the first mapping manner.

Optionally, the manner in which the terminal determines the target includes any of the following:

The protocol pre-agrees that the target mapping mode is determined according to the mapping relationship between the layer number of the transport layer and the first mapping mode;

selecting the target mapping mode from the first mapping mode;

The target mapping mode is determined according to the target information sent by the network-side device, where the target information is used to indicate the target mapping mode or a second mapping mode, and the second mapping mode is used for the terminal to select the target Mapping mode, the second mapping mode is at least two mapping modes in the first mapping mode.

Optionally, when the target mapping mode is selected from the first mapping mode, or when the target mapping mode is determined according to target information sent by the network side device, and the target information is used to indicate the first mapping mode. In the case of two mapping modes, the method further includes:

Receive indication information sent by the terminal, where the indication information is used to indicate the target mapping mode.

Optionally, when reporting the CSI, it is assumed that a DMRS port group is used for transmission of the physical downlink shared channel PDSCH, or a channel state information reference signal resource is used when calculating the CSI. When the CSI-RS resource is used for channel measurement, the first mapping manner includes at least two of the following mapping manners:

The first sub-mapping mode defined by Rel-15 of the new air interface NR;

The second sub-mapping mode defined by Long Term Evolution LTE;

A predefined third sub-mapping mode, the third sub-mapping mode includes: when the number of transmission layers is N-4 layers, a single code is used, and N is an integer greater than 4 and less than 9; the number of transmission layers is N layers , both codeword 0 and codeword 1 are mapped to at least one transport layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and the sum of the layers of the transport layers corresponding to codeword 0 and codeword 1 is equal to N;

A predefined fourth sub-mapping mode, the fourth sub-mapping mode includes: when the number of transmission layers is 1, a single code is used; when the number of transmission layers is M, both codeword 0 and codeword 1 are mapped at least To a transport layer, there is no overlap between the layers corresponding to codeword 0 and codeword 1, and the sum of the layers of the transport layers corresponding to codeword 0 and codeword 1 is equal to M, where M is an integer greater than 1 and less than 9.

Optionally, when the first mapping mode includes the first target sub-mapping mode, and the transport layers are arranged in a preset order, the method further includes:

receiving the number of layers of the transport layer corresponding to each codeword sent by the terminal;

Determine the mapping relationship between each codeword and the transmission layer in the first target sub-mapping mode according to the number of layers of the transmission layer corresponding to each codeword;

Wherein, the first target sub-mapping mode is the third sub-mapping mode and/or the fourth sub-mapping mode.

Optionally, when the first mapping mode includes a first target sub-mapping mode, the method further includes:

receiving the first target sub-mapping mode, where the first target sub-mapping mode is the third sub-mapping mode and/or the fourth sub-mapping mode;

Determine the mapping relationship between each codeword and the transmission layer in the first target sub-mapping manner.

Optionally, when reporting the CSI, it is assumed that at least two DMRS port groups are used for transmission of PDSCH or when at least two CSI-RS resources are used for channel measurement when calculating the CSI, The first mapping manner includes the following at least two mapping manners:

The fifth sub-mapping method defined by Rel-15 of the new air interface NR;

The sixth sub-mapping mode defined by Long Term Evolution LTE;

A predefined seventh sub-mapping mode, the seventh sub-mapping mode includes: when the number of transmission layers is from 2 to 4 layers, a single code is used; when the number of transmission layers is N, codeword 0 and codeword 1 Both are mapped to at least one transmission layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and the sum of the number of layers of the transmission layers corresponding to codeword 0 and codeword 1 is equal to N, where N is greater than 4 and less than 9 the integer;

A predefined eighth sub-mapping mode, the eighth sub-mapping mode includes: when the number of transport layers is M, both codeword 0 and codeword 1 are mapped to at least one transport layer, and codeword 0 and codeword 1 correspond to There is no overlap between layers, and the sum of the layers of the transmission layers corresponding to codeword 0 and codeword 1 is equal to M, where M is an integer greater than 1 and less than 9.

Optionally, when the first mapping mode includes the seventh sub-mapping mode and/or the eighth sub-mapping mode, the transmission layer corresponding to each codeword is respectively mapped to a DMRS port group, or The channel corresponding to each codeword in transmission is obtained by measuring a CSI-RS resource respectively; each transmission layer is arranged in a preset order.

Optionally, when the first mapping mode includes the second target sub-mapping mode, the method further includes:

receiving the second target sub-mapping mode sent by the terminal, where the second target sub-mapping mode is the seventh sub-mapping mode and/or the eighth sub-mapping mode;

Determine the mapping relationship between each codeword and the transmission layer in the second target sub-mapping manner.

Optionally, the CSI includes at least two rank indication RIs, and the sum of the at least two RIs is equal to the total number of layers of the transmission layer.

It should be noted that this embodiment is an implementation of the network-side device corresponding to the embodiment shown in FIG. 2 , and reference may be made to the relevant description of the embodiment shown in FIG. 2 for the specific implementation. In order to avoid repeated descriptions, This embodiment will not be repeated, and the same beneficial effects can also be achieved.

Please refer to FIG. 6. FIG. 6 is a structural diagram of a terminal provided by an embodiment of the present invention. As shown in FIG. 6, a terminal 600 includes:

A first determining module 601, configured to determine at least one target mapping mode in a first mapping mode, where the first mapping mode includes at least two mapping modes, and the mapping modes are used to represent the mapping relationship between the codeword and the transport layer;

a calculation module 602, configured to calculate channel state information CSI according to the target mapping mode;

The first sending module 603 is configured to report the CSI to the network side device.

Optionally, the determining at least one target mapping manner in the first mapping manner includes any of the following:

The protocol pre-stipulates that the target mapping mode is determined according to the mapping relationship between the number of layers of the transport layer and the first mapping mode;

selecting the target mapping mode from the first mapping mode;

The target mapping mode is determined according to the target information sent by the network-side device, where the target information is used to indicate the target mapping mode or a second mapping mode, and the second mapping mode is used for the terminal to select the target Mapping mode, the second mapping mode is at least two mapping modes in the first mapping mode.

Optionally, when the target mapping mode is selected from the first mapping mode, or when the target mapping mode is determined according to target information sent by the network side device, and the target information is used to indicate the first mapping mode. In the case of two mapping modes, the terminal 600 further includes:

The second sending module is configured to send indication information to the network side device, where the indication information is used to indicate the target mapping mode.

Optionally, when reporting the CSI, it is assumed that a DMRS port group is used for transmission of the physical downlink shared channel PDSCH, or a channel state information reference signal resource is used when calculating the CSI. When the CSI-RS resource is used for channel measurement, the first mapping manner includes at least two of the following mapping manners:

The first sub-mapping mode defined by Rel-15 of the new air interface NR;

The second sub-mapping mode defined by Long Term Evolution LTE;

A predefined third sub-mapping mode, the third sub-mapping mode includes: when the number of transmission layers is N-4 layers, a single code is used, and N is an integer greater than 4 and less than 9; the number of transmission layers is N layers , both codeword 0 and codeword 1 are mapped to at least one transport layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and the sum of the layers of the transport layers corresponding to codeword 0 and codeword 1 is equal to N;

A predefined fourth sub-mapping mode, the fourth sub-mapping mode includes: when the number of transmission layers is 1, a single code is used; when the number of transmission layers is M, both codeword 0 and codeword 1 are mapped at least To a transport layer, there is no overlap between the layers corresponding to codeword 0 and codeword 1, and the sum of the layers of the transport layers corresponding to codeword 0 and codeword 1 is equal to M, where M is an integer greater than 1 and less than 9.

Optionally, when the first mapping mode includes the first target sub-mapping mode, and each transport layer is arranged in a preset order, the terminal 600 further includes:

The third sending module is configured to send the number of layers of the transport layer corresponding to each codeword to the network side device, so that the network side device can determine the first target sub-mapping mode according to the number of layers of the transport layer corresponding to each codeword The mapping relationship between each codeword and the transport layer;

Wherein, the first target sub-mapping mode is the third sub-mapping mode and/or the fourth sub-mapping mode.

Optionally, when the first mapping mode includes the first target sub-mapping mode, the terminal 600 further includes:

a fourth sending module, configured to send the first target sub-mapping mode to the network-side device, so that the network-side device can determine the mapping relationship between each codeword and the transport layer in the first target sub-mapping mode; the first target sub-mapping mode The target sub-mapping mode is the third sub-mapping mode and/or the fourth sub-mapping mode.

Optionally, when reporting the CSI, it is assumed that at least two DMRS port groups are used for transmission of PDSCH or when at least two CSI-RS resources are used for channel measurement when calculating the CSI, The first mapping manner includes the following at least two mapping manners:

The fifth sub-mapping method defined by Rel-15 of the new air interface NR;

The sixth sub-mapping mode defined by Long Term Evolution LTE;

A predefined seventh sub-mapping mode, the seventh sub-mapping mode includes: when the number of transmission layers is from 2 to 4 layers, a single code is used; when the number of transmission layers is N, codeword 0 and codeword 1 Both are mapped to at least one transmission layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and the sum of the number of layers of the transmission layers corresponding to codeword 0 and codeword 1 is equal to N, where N is greater than 4 and less than 9 the integer;

A predefined eighth sub-mapping mode, the eighth sub-mapping mode includes: when the number of transport layers is M, both codeword 0 and codeword 1 are mapped to at least one transport layer, and codeword 0 and codeword 1 correspond to There is no overlap between layers, and the sum of the number of layers of the transmission layers corresponding to codeword 0 and codeword 1 is equal to M, where M is an integer greater than 1 and less than 9.

Optionally, when the first mapping mode includes the seventh sub-mapping mode and/or the eighth sub-mapping mode, the transmission layer corresponding to each codeword is respectively mapped to a DMRS port group, or The channel corresponding to each codeword in transmission is obtained by measuring a CSI-RS resource respectively; each transmission layer is arranged in a preset order.

Optionally, when the first mapping mode includes the second target sub-mapping mode, the terminal 600 further includes:

a fifth sending module, configured to send the second target sub-mapping mode to the network-side device, so that the network-side device can determine the mapping relationship between each codeword and the transport layer in the second target sub-mapping mode; the second target sub-mapping mode The target sub-mapping mode is the seventh sub-mapping mode and/or the eighth sub-mapping mode.

Optionally, the CSI includes at least two rank indication RIs, and the sum of the at least two RIs is equal to the total number of layers of the transmission layer.

It should be noted that, in this embodiment, the above-mentioned terminal 600 may be a terminal of any implementation mode in the method embodiment in this embodiment of the present invention. Any implementation of the terminal in the method embodiment in this embodiment of the present invention may be used by the The implementation of the above-mentioned terminal 600 and the achievement of the same beneficial effects will not be repeated here.

Please refer to FIG. 7. FIG. 7 is a structural diagram of a network side device provided by an embodiment of the present invention. As shown in FIG. 7, the network side device 700 includes:

The receiving module 701 is configured to receive channel state information CSI reported by the terminal, where the CSI is obtained by the terminal according to at least one target mapping method, and the target mapping method is determined according to at least two mapping methods in the first mapping method.

Optionally, the manner in which the terminal determines the target includes any of the following:

The protocol pre-agrees that the target mapping mode is determined according to the mapping relationship between the layer number of the transport layer and the first mapping mode;

selecting the target mapping mode from the first mapping mode;

The target mapping mode is determined according to target information sent by the network-side device, where the target information is used to indicate the target mapping mode or a second mapping mode, and the second mapping mode is used for the terminal to select the target Mapping mode, the second mapping mode is at least two mapping modes in the first mapping mode.

Optionally, when the target mapping mode is selected from the first mapping mode, or when the target mapping mode is determined according to target information sent by the network side device, and the target information is used to indicate the first mapping mode. In the two-mapping mode, the receiving module 701 is also used for:

Receive indication information sent by the terminal, where the indication information is used to indicate the target mapping mode.

Optionally, when reporting the CSI, it is assumed that a DMRS port group is used for transmission of the physical downlink shared channel PDSCH, or a channel state information reference signal resource is used when calculating the CSI. When the CSI-RS resource is used for channel measurement, the first mapping manner includes at least two of the following mapping manners:

The first sub-mapping mode defined by Rel-15 of the new air interface NR;

The second sub-mapping mode defined by Long Term Evolution LTE;

A predefined third sub-mapping mode, the third sub-mapping mode includes: when the number of transmission layers is N-4 layers, a single code is used, and N is an integer greater than 4 and less than 9; the number of transmission layers is N layers , both codeword 0 and codeword 1 are mapped to at least one transport layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and the sum of the layers of the transport layers corresponding to codeword 0 and codeword 1 is equal to N;

A predefined fourth sub-mapping mode, the fourth sub-mapping mode includes: when the number of transmission layers is 1, a single code is used; when the number of transmission layers is M, both codeword 0 and codeword 1 are mapped at least To a transport layer, there is no overlap between the layers corresponding to codeword 0 and codeword 1, and the sum of the layers of the transport layers corresponding to codeword 0 and codeword 1 is equal to M, where M is an integer greater than 1 and less than 9.

Optionally, when the first mapping mode includes the first target sub-mapping mode, and each transport layer is arranged in a preset order, the network-side device 700 further includes a second determining module,

The receiving module 701 is further configured to: receive the number of layers of the transmission layer corresponding to each codeword sent by the terminal;

The second determining module is configured to determine the mapping relationship between each codeword and the transmission layer in the first target sub-mapping mode according to the number of layers of the transmission layer corresponding to each codeword;

Wherein, the first target sub-mapping mode is the third sub-mapping mode and/or the fourth sub-mapping mode.

Optionally, when the first mapping mode includes the first target sub-mapping mode, the network-side device 700 further includes a third determining module,

The receiving module 701 is further configured to: receive the first target sub-mapping mode, where the first target sub-mapping mode is the third sub-mapping mode and/or the fourth sub-mapping mode;

The third determining module is configured to determine the mapping relationship between each codeword and the transmission layer in the first target sub-mapping manner.

Optionally, when reporting the CSI, it is assumed that at least two DMRS port groups are used for transmission of PDSCH or when at least two CSI-RS resources are used for channel measurement when calculating the CSI, The first mapping manner includes the following at least two mapping manners:

The fifth sub-mapping method defined by Rel-15 of the new air interface NR;

The sixth sub-mapping mode defined by Long Term Evolution LTE;

A predefined seventh sub-mapping mode, the seventh sub-mapping mode includes: when the number of transmission layers is from 2 to 4 layers, a single code is used; when the number of transmission layers is N, codeword 0 and codeword 1 Both are mapped to at least one transmission layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and the sum of the number of layers of the transmission layers corresponding to codeword 0 and codeword 1 is equal to N, where N is greater than 4 and less than 9 the integer;

A predefined eighth sub-mapping mode, the eighth sub-mapping mode includes: when the number of transport layers is M, both codeword 0 and codeword 1 are mapped to at least one transport layer, and codeword 0 and codeword 1 correspond to There is no overlap between layers, and the sum of the number of layers of the transmission layers corresponding to codeword 0 and codeword 1 is equal to M, where M is an integer greater than 1 and less than 9.

Optionally, when the first mapping mode includes the seventh sub-mapping mode and/or the eighth sub-mapping mode, the transmission layer corresponding to each codeword is respectively mapped to a DMRS port group, or The channel corresponding to each codeword in transmission is obtained by measuring a CSI-RS resource respectively; each transmission layer is arranged in a preset order.

Optionally, when the first mapping mode includes the second target sub-mapping mode, the network-side device 700 further includes a fourth determining module,

The receiving module 701 is further configured to: receive the second target sub-mapping mode sent by the terminal, where the second target sub-mapping mode is the seventh sub-mapping mode and/or the eighth sub-mapping mode;

The fourth determining module is configured to determine the mapping relationship between each codeword and the transmission layer in the second target sub-mapping manner.

Optionally, the CSI includes at least two rank indication RIs, and the sum of the at least two RIs is equal to the total number of layers of the transmission layer.

It should be noted that, in this embodiment, the network-side device 700 may be a terminal in any implementation of the method embodiments in the embodiments of the present invention, and any implementation of the terminals in the method embodiments in the embodiments of the present invention may be used in this embodiment. The above-mentioned network-side device 700 in the above-mentioned network side device 700 realizes and achieves the same beneficial effects, which will not be repeated here.

Please refer to FIG. 8 . FIG. 8 is a structural diagram of another terminal provided by an embodiment of the present invention. As shown in FIG. 8 , the terminal includes: a transceiver 810 , a memory 820 , a processor 800 , and storage on the memory 820 and a program that can be run on the processor 800, wherein:

The processor 800 is configured to determine at least one target mapping mode in the first mapping mode, and calculate the channel state information CSI according to the target mapping mode; the first mapping mode includes at least two mapping modes, the mapping mode Used to represent the mapping relationship between the codeword and the transport layer;

The transceiver 810 is used for reporting the CSI to the network side device;

or,

The transceiver 810 is configured to determine at least one target mapping mode in the first mapping mode, the first mapping mode includes at least two mapping modes, and the mapping modes are used to represent the mapping relationship between the codeword and the transport layer;

Calculate channel state information CSI according to the target mapping method;

The CSI is reported to the network side device.

Optionally, the determining at least one target mapping manner in the first mapping manner includes any of the following:

The protocol pre-agrees that the target mapping mode is determined according to the mapping relationship between the layer number of the transport layer and the first mapping mode;

selecting the target mapping mode from the first mapping mode;

The target mapping mode is determined according to target information sent by the network-side device, where the target information is used to indicate the target mapping mode or a second mapping mode, and the second mapping mode is used for the terminal to select the target Mapping mode, the second mapping mode is at least two mapping modes in the first mapping mode.

Optionally, when the target mapping mode is selected from the first mapping mode, or when the target mapping mode is determined according to target information sent by the network side device, and the target information is used to indicate the first mapping mode. In the two-mapping mode, the transceiver 810 is also used for:

Send indication information to the network side device, where the indication information is used to indicate the target mapping mode.

Optionally, when reporting the CSI, it is assumed that a DMRS port group is used for transmission of the physical downlink shared channel PDSCH, or a channel state information reference signal resource is used when calculating the CSI. When the CSI-RS resource is used for channel measurement, the first mapping manner includes at least two of the following mapping manners:

The first sub-mapping mode defined by Rel-15 of the new air interface NR;

The second sub-mapping mode defined by Long Term Evolution LTE;

A predefined third sub-mapping mode, the third sub-mapping mode includes: when the number of transmission layers is N-4 layers, a single code is used, and N is an integer greater than 4 and less than 9; the number of transmission layers is N layers , both codeword 0 and codeword 1 are mapped to at least one transport layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and the sum of the layers of the transport layers corresponding to codeword 0 and codeword 1 is equal to N;

A predefined fourth sub-mapping mode, the fourth sub-mapping mode includes: when the number of transmission layers is 1, a single code is used; when the number of transmission layers is M, both codeword 0 and codeword 1 are mapped at least To a transport layer, there is no overlap between the layers corresponding to codeword 0 and codeword 1, and the sum of the layers of the transport layers corresponding to codeword 0 and codeword 1 is equal to M, where M is an integer greater than 1 and less than 9.

Optionally, when the first mapping mode includes the first target sub-mapping mode, and each transport layer is arranged in a preset order, the transceiver 810 is further configured to:

Sending the number of layers of the transport layer corresponding to each codeword to the network side device, so that the network side device can determine, according to the number of layers of the transport layer corresponding to each codeword, each codeword and the transport layer in the first target sub-mapping mode the mapping relationship;

Wherein, the first target sub-mapping mode is the third sub-mapping mode and/or the fourth sub-mapping mode.

Optionally, when the first mapping mode includes a first target sub-mapping mode, the transceiver 810 is further configured to:

Send the first target sub-mapping mode to the network side device for the network side device to determine the mapping relationship between each codeword and the transport layer in the first target sub-mapping mode; the first target sub-mapping mode is the The third sub-mapping mode and/or the fourth sub-mapping mode.

Optionally, when reporting the CSI, it is assumed that at least two DMRS port groups are used for transmission of PDSCH or when at least two CSI-RS resources are used for channel measurement when calculating the CSI, The first mapping manner includes the following at least two mapping manners:

The fifth sub-mapping method defined by Rel-15 of the new air interface NR;

The sixth sub-mapping mode defined by Long Term Evolution LTE;

A predefined seventh sub-mapping mode, the seventh sub-mapping mode includes: when the number of transmission layers is from 2 to 4 layers, a single code is used; when the number of transmission layers is N, codeword 0 and codeword 1 Both are mapped to at least one transmission layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and the sum of the number of layers of the transmission layers corresponding to codeword 0 and codeword 1 is equal to N, where N is greater than 4 and less than 9 the integer;

A predefined eighth sub-mapping mode, the eighth sub-mapping mode includes: when the number of transport layers is M, both codeword 0 and codeword 1 are mapped to at least one transport layer, and codeword 0 and codeword 1 correspond to There is no overlap between layers, and the sum of the number of layers of the transmission layers corresponding to codeword 0 and codeword 1 is equal to M, where M is an integer greater than 1 and less than 9.

Optionally, when the first mapping mode includes the seventh sub-mapping mode and/or the eighth sub-mapping mode, the transmission layer corresponding to each codeword is respectively mapped to a DMRS port group, or The channel corresponding to each codeword in transmission is obtained by measuring a CSI-RS resource respectively; each transmission layer is arranged in a preset order.

Optionally, when the first mapping mode includes a second target sub-mapping mode, the transceiver 810 is further configured to:

Send the second target sub-mapping mode to the network side device for the network side device to determine the mapping relationship between each codeword and the transport layer in the second target sub-mapping mode; the second target sub-mapping mode is the The seventh sub-mapping mode and/or the eighth sub-mapping mode.

Optionally, the CSI includes at least two rank indication RIs, and the sum of the at least two RIs is equal to the total number of layers of the transmission layer.

It should be noted that the above-mentioned terminal in this embodiment may be a terminal of any implementation mode in the method embodiment in this embodiment of the present invention, and any implementation mode of the terminal in the method embodiment in this embodiment of the present invention may be used by the terminal in this embodiment. What is achieved by the above-mentioned terminal and achieves the same beneficial effects, will not be repeated here.

Referring to FIG. 9, FIG. 9 is a structural diagram of another network-side device provided by an embodiment of the present invention. As shown in FIG. 9, the network-side device includes: a transceiver 910, a memory 920, a processor 900, and a A program on the memory 920 and executable on the processor, wherein:

The transceiver 910 is configured to receive channel state information CSI reported by the terminal, where the CSI is calculated and obtained by the terminal according to at least one target mapping manner, and the target mapping manner is determined according to at least two mapping manners in the first mapping manner.

The transceiver 910 may be used to receive and transmit data under the control of the processor 900 .

In FIG. 9 , the bus architecture may include any number of interconnected buses and bridges, in particular one or more processors represented by processor 900 and various circuits of memory represented by memory 920 linked together. The bus architecture may also link together various other circuits, such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be described further herein. The bus interface provides the interface. Transceiver 910 may be a number of elements, including a transmitter and a receiver, that provide a means for communicating with various other devices over a transmission medium.

The processor 900 is responsible for managing the bus architecture and general processing, and the memory 920 may store data used by the processor 900 in performing operations.

It should be noted that the memory 920 is not limited to only on the network side device, and the memory 920 and the processor 900 may be separated and located in different geographical locations.

Optionally, the manner in which the terminal determines the target includes any of the following:

The protocol pre-agrees that the target mapping mode is determined according to the mapping relationship between the layer number of the transport layer and the first mapping mode;

selecting the target mapping mode from the first mapping mode;

The target mapping mode is determined according to target information sent by the network-side device, where the target information is used to indicate the target mapping mode or a second mapping mode, and the second mapping mode is used for the terminal to select the target Mapping mode, the second mapping mode is at least two mapping modes in the first mapping mode.

Optionally, when the target mapping mode is selected from the first mapping mode, or when the target mapping mode is determined according to target information sent by the network side device, and the target information is used to indicate the first mapping mode. In the case of two mapping modes, the transceiver 910 is further configured to: receive indication information sent by the terminal, where the indication information is used to indicate the target mapping mode.

Optionally, when reporting the CSI, it is assumed that a DMRS port group is used for transmission of the physical downlink shared channel PDSCH, or a channel state information reference signal resource is used when calculating the CSI. When the CSI-RS resource is used for channel measurement, the first mapping manner includes at least two of the following mapping manners:

The first sub-mapping mode defined by Rel-15 of the new air interface NR;

The second sub-mapping mode defined by Long Term Evolution LTE;

A predefined third sub-mapping mode, the third sub-mapping mode includes: when the number of transmission layers is N-4 layers, a single code is used, and N is an integer greater than 4 and less than 9; the number of transmission layers is N layers , both codeword 0 and codeword 1 are mapped to at least one transport layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and the sum of the layers of the transport layers corresponding to codeword 0 and codeword 1 is equal to N;

A predefined fourth sub-mapping mode, the fourth sub-mapping mode includes: when the number of transmission layers is 1, a single code is used; when the number of transmission layers is M, both codeword 0 and codeword 1 are mapped at least To a transport layer, there is no overlap between the layers corresponding to codeword 0 and codeword 1, and the sum of the layers of the transport layers corresponding to codeword 0 and codeword 1 is equal to M, where M is an integer greater than 1 and less than 9.

Optionally, when the first mapping mode includes the first target sub-mapping mode, and each transmission layer is arranged in a preset order, the transceiver 910 is further configured to: receive the corresponding codewords sent by the terminal. The number of layers of the transport layer;

The processor 900 determines the mapping relationship between each codeword and the transmission layer in the first target sub-mapping mode according to the number of layers of the transmission layer corresponding to each codeword;

Wherein, the first target sub-mapping mode is the third sub-mapping mode and/or the fourth sub-mapping mode.

Optionally, when the first mapping mode includes a first target sub-mapping mode, the transceiver 910 is further configured to: receive the first target sub-mapping mode, where the first target sub-mapping mode is the The third sub-mapping mode and/or the fourth sub-mapping mode;

The processor 900 is further configured to: determine the mapping relationship between each codeword and the transmission layer in the first target sub-mapping manner.

Optionally, when reporting the CSI, it is assumed that at least two DMRS port groups are used for transmission of PDSCH or when at least two CSI-RS resources are used for channel measurement when calculating the CSI, The first mapping manner includes the following at least two mapping manners:

The fifth sub-mapping method defined by Rel-15 of the new air interface NR;

The sixth sub-mapping mode defined by Long Term Evolution LTE;

A predefined seventh sub-mapping mode, the seventh sub-mapping mode includes: when the number of transmission layers is from 2 to 4 layers, a single code is used; when the number of transmission layers is N, codeword 0 and codeword 1 Both are mapped to at least one transmission layer, the layers corresponding to codeword 0 and codeword 1 do not overlap, and the sum of the number of layers of the transmission layers corresponding to codeword 0 and codeword 1 is equal to N, where N is greater than 4 and less than 9 the integer;

A predefined eighth sub-mapping mode, the eighth sub-mapping mode includes: when the number of transport layers is M, both codeword 0 and codeword 1 are mapped to at least one transport layer, and codeword 0 and codeword 1 correspond to There is no overlap between layers, and the sum of the number of layers of the transmission layers corresponding to codeword 0 and codeword 1 is equal to M, where M is an integer greater than 1 and less than 9.

Optionally, when the first mapping mode includes the seventh sub-mapping mode and/or the eighth sub-mapping mode, the transmission layer corresponding to each codeword is respectively mapped to a DMRS port group, or The channel corresponding to each codeword in transmission is obtained by measuring a CSI-RS resource respectively; each transmission layer is arranged in a preset order.

Optionally, when the first mapping mode includes a second target sub-mapping mode, the transceiver 910 is further configured to: receive the second target sub-mapping mode sent by the terminal, the second target sub-mapping mode. The mapping mode is the seventh sub-mapping mode and/or the eighth sub-mapping mode;

The processor 900 is further configured to: determine the mapping relationship between each codeword and the transmission layer in the second target sub-mapping manner.

Optionally, the CSI includes at least two rank indication RIs, and the sum of the at least two RIs is equal to the total number of layers of the transmission layer.

It should be noted that the above network-side device in this embodiment may be a network-side device in any implementation manner in the method embodiment in the embodiment of the present invention, and any implementation manner in the network-side device in the method embodiment in the embodiment of the present invention may be It is implemented by the above-mentioned network-side device in this embodiment, and achieves the same beneficial effects, which will not be repeated here.

Embodiments of the present invention further provide a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, implements the steps in the method for reporting channel state information on the terminal side provided by the embodiments of the present invention, or the program When executed by the processor, the steps in the method for reporting channel state information on the network device side provided by the embodiment of the present invention are implemented.

In the several embodiments provided in this application, it should be understood that the disclosed method and apparatus may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may be physically included individually, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware, or may be implemented in the form of hardware plus software functional units.

The above-mentioned integrated units implemented in the form of software functional units can be stored in a computer-readable storage medium. The above-mentioned software functional unit is stored in a storage medium, and includes several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute part of the method for processing information data blocks described in various embodiments of the present invention step. The aforementioned storage medium includes: U disk, mobile hard disk, Read-Only Memory (ROM for short), Random Access Memory (RAM for short), magnetic disk or CD, etc. that can store program codes. medium.

The above are the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can be made. It should be regarded as the protection scope of the present invention.

Claims (31)

1. A method for reporting channel state information is applied to a terminal, and is characterized by comprising the following steps:

determining at least one target mapping mode in a first mapping mode, wherein the first mapping mode comprises at least two mapping modes, and the mapping modes are used for representing the mapping relation between a code word and a transmission layer; the first mapping mode is associated with the number of demodulation reference signal port groups (DMRS port groups) used for transmission of an assumed Physical Downlink Shared Channel (PDSCH) when the CSI is reported or the number of channel state information reference signal resources (CSI-RS resources) used for measuring a channel when the CSI is calculated;

calculating Channel State Information (CSI) according to the target mapping mode;

and reporting the CSI to network side equipment.

2. The method according to claim 1, wherein the determining at least one target mapping in the first mapping comprises any one of:

the protocol appoints in advance to determine the target mapping mode according to the mapping relation between the number of transmission layers and the first mapping mode;

selecting the target mapping mode from the first mapping modes;

and determining the target mapping mode according to target information sent by the network side equipment, wherein the target information is used for indicating the target mapping mode or indicating a second mapping mode, the second mapping mode is used for a terminal to select the target mapping mode, and the second mapping mode is at least two mapping modes in the first mapping mode.

3. The method according to claim 2, wherein when the target mapping scheme is selected from the first mapping schemes, or when the target mapping scheme is determined according to target information sent by a network side device, and the target information is used to indicate the second mapping scheme, the method further comprises:

and sending indication information to the network side equipment, wherein the indication information is used for indicating the target mapping mode.

4. The method of claim 1, wherein the first mapping manner comprises at least two mapping manners as follows, in case that one demodulation reference signal port group (DMRS port group) is used for transmission of a Physical Downlink Shared Channel (PDSCH) when the CSI is reported or in case that one channel state information reference signal resource (CSI-RS resource) is used for measuring a channel when the CSI is calculated:

a first sub-mapping mode defined by Rel-15 of the new air interface NR;

a second sub-mapping mode defined by Long Term Evolution (LTE);

a predefined third sub-mapping manner, wherein the third sub-mapping manner includes: when the number of the transmission layers is N-4, a single code is adopted, and N is an integer which is more than 4 and less than 9; when the number of the transmission layers is N, both the code word 0 and the code word 1 are mapped to at least one transmission layer, the layers corresponding to the code word 0 and the code word 1 are not overlapped, and the sum of the number of the transmission layers corresponding to the code word 0 and the code word 1 is equal to N;

a predefined fourth sub-mapping manner, wherein the fourth sub-mapping manner includes: when the number of the transmission layers is 1 layer, a single code is adopted; when the number of the transmission layers is M, both the codeword 0 and the codeword 1 are mapped to at least one transmission layer, the layers corresponding to the codeword 0 and the codeword 1 are not overlapped, the sum of the number of the transmission layers corresponding to the codeword 0 and the codeword 1 is equal to M, and M is an integer greater than 1 and less than 9.

5. The method of claim 4, wherein when the first mapping scheme comprises a first target sub-mapping scheme and the transport layers are arranged according to a predetermined order, the method further comprises:

sending the number of transmission layers corresponding to each codeword to network side equipment, so that the network side equipment determines the mapping relation between each codeword and a transmission layer in the first target sub-mapping mode according to the number of transmission layers corresponding to each codeword;

wherein the first target sub-mapping manner is the third sub-mapping manner and/or the fourth sub-mapping manner.

6. The method of claim 4, wherein when the first mapping style comprises a first target child mapping style, the method further comprises:

sending the first target sub-mapping mode to network side equipment so that the network side equipment can determine the mapping relation between each code word and a transmission layer in the first target sub-mapping mode; the first target sub-mapping mode is the third sub-mapping mode and/or the fourth sub-mapping mode.

7. The method of claim 1, wherein the first mapping scheme comprises at least two of the following mapping schemes in case that at least two DMRS port groups are used for PDSCH transmission when reporting the CSI or at least two CSI-RS resources are used for measurement channels when calculating the CSI:

a fifth sub-mapping mode defined by Rel-15 of the new air interface NR;

a sixth sub-mapping mode defined by Long Term Evolution (LTE);

a predefined seventh sub-mapping manner, wherein the seventh sub-mapping manner includes: when the number of the transmission layers is 2 to 4, a single code is adopted; when the number of the transmission layers is N, both the code word 0 and the code word 1 are mapped to at least one transmission layer, the layers corresponding to the code word 0 and the code word 1 are not overlapped, the sum of the number of the transmission layers corresponding to the code word 0 and the code word 1 is equal to N, and N is an integer which is more than 4 and less than 9;

a predefined eighth sub-mapping manner, where the eighth sub-mapping manner includes: when the number of the transmission layers is M, both the codeword 0 and the codeword 1 are mapped to at least one transmission layer, the layers corresponding to the codeword 0 and the codeword 1 are not overlapped, the sum of the number of the transmission layers corresponding to the codeword 0 and the codeword 1 is equal to M, and M is an integer greater than 1 and less than 9.

8. The method according to claim 7, wherein when the first mapping manner includes the seventh sub-mapping manner and/or the eighth sub-mapping manner, a transmission layer corresponding to each codeword is mapped to one DMRS port group, or a channel corresponding to each codeword during transmission is measured by one CSI-RS resource; the transmission layers are arranged according to a preset sequence.

9. The method of claim 7, wherein when the first mapping style includes a second target sub-mapping style, the method further comprises:

sending the second target sub-mapping mode to network side equipment so that the network side equipment can determine the mapping relation between each code word and a transmission layer in the second target sub-mapping mode; the second target sub-mapping mode is the seventh sub-mapping mode and/or the eighth sub-mapping mode.

10. The method of claim 7, wherein the CSI comprises at least two Rank Indication (RI), and wherein a sum of the at least two RI is equal to a total number of the transmission layers.

11. A channel state information reporting method is applied to network side equipment and is characterized by comprising the following steps:

receiving Channel State Information (CSI) reported by a terminal, wherein the CSI is obtained by the terminal through calculation according to at least one target mapping mode, and the target mapping mode is determined according to at least two mapping modes in a first mapping mode; the first mapping mode is associated with the number of demodulation reference signal port groups (DMRS port groups) used for transmission of an assumed Physical Downlink Shared Channel (PDSCH) when the CSI is reported or the number of channel state information reference signal resources (CSI-RS resources) used for measuring a channel when the CSI is calculated.

12. The method according to claim 11, wherein the terminal determining the target mapping manner comprises any one of:

the protocol appoints in advance to determine the target mapping mode according to the mapping relation between the number of transmission layers and the first mapping mode;

selecting the target mapping mode from the first mapping modes;

and determining the target mapping mode according to target information sent by the network side equipment, wherein the target information is used for indicating the target mapping mode or indicating a second mapping mode, the second mapping mode is used for a terminal to select the target mapping mode, and the second mapping mode is at least two mapping modes in the first mapping mode.

13. The method according to claim 12, wherein when the target mapping scheme is selected from the first mapping schemes, or when the target mapping scheme is determined according to target information sent by a network side device, and the target information is used to indicate the second mapping scheme, the method further comprises:

and receiving indication information sent by the terminal, wherein the indication information is used for indicating the target mapping mode.

14. The method according to claim 11, wherein the first mapping manner includes at least two mapping manners as follows, in case that one demodulation reference signal port group DMRS port group is used for transmission of a physical downlink shared channel PDSCH when reporting the CSI or one channel state information reference signal resource CSI-RS resource is used for measuring a channel when calculating the CSI:

a first sub-mapping mode defined by Rel-15 of the new air interface NR;

a second sub-mapping mode defined by Long Term Evolution (LTE);

a predefined third sub-mapping manner, wherein the third sub-mapping manner includes: when the number of the transmission layers is N-4, a single code is adopted, and N is an integer which is more than 4 and less than 9; when the number of the transmission layers is N, both the code word 0 and the code word 1 are mapped to at least one transmission layer, the layers corresponding to the code word 0 and the code word 1 are not overlapped, and the sum of the number of the transmission layers corresponding to the code word 0 and the code word 1 is equal to N;

a predefined fourth sub-mapping manner, wherein the fourth sub-mapping manner includes: when the number of the transmission layers is 1 layer, a single code is adopted; when the number of the transmission layers is M, both the codeword 0 and the codeword 1 are mapped to at least one transmission layer, the layers corresponding to the codeword 0 and the codeword 1 are not overlapped, the sum of the number of the transmission layers corresponding to the codeword 0 and the codeword 1 is equal to M, and M is an integer greater than 1 and less than 9.

15. The method of claim 14, wherein when the first mapping scheme comprises a first target sub-mapping scheme and the transport layers are arranged in a predetermined order, the method further comprises:

receiving the number of transmission layers corresponding to each code word sent by the terminal;

determining the mapping relation between each code word and the transmission layer in the first target sub-mapping mode according to the number of the transmission layers corresponding to each code word;

wherein the first target sub-mapping manner is the third sub-mapping manner and/or the fourth sub-mapping manner.

16. The method of claim 14, wherein when the first mapping style comprises a first target child mapping style, the method further comprises:

receiving the first target sub-mapping mode, wherein the first target sub-mapping mode is the third sub-mapping mode and/or the fourth sub-mapping mode;

and determining the mapping relation between each code word and a transmission layer in the first target sub-mapping mode.

17. The method of claim 11, wherein the first mapping scheme comprises at least two of the following mapping schemes in case that at least two DMRS port groups are used for PDSCH transmission when reporting the CSI or at least two CSI-RS resources are used for measurement channels when calculating the CSI:

a fifth sub-mapping mode defined by Rel-15 of the new air interface NR;

a sixth sub-mapping mode defined by Long Term Evolution (LTE);

a predefined seventh sub-mapping manner, wherein the seventh sub-mapping manner includes: when the number of the transmission layers is 2 to 4, a single code is adopted; when the number of the transmission layers is N, both the code word 0 and the code word 1 are mapped to at least one transmission layer, the layers corresponding to the code word 0 and the code word 1 are not overlapped, the sum of the number of the transmission layers corresponding to the code word 0 and the code word 1 is equal to N, and N is an integer which is more than 4 and less than 9;

a predefined eighth sub-mapping manner, where the eighth sub-mapping manner includes: when the number of the transmission layers is M, both the codeword 0 and the codeword 1 are mapped to at least one transmission layer, the layers corresponding to the codeword 0 and the codeword 1 are not overlapped, the sum of the number of the transmission layers corresponding to the codeword 0 and the codeword 1 is equal to M, and M is an integer greater than 1 and less than 9.

18. The method according to claim 17, wherein when the first mapping manner includes the seventh sub-mapping manner and/or the eighth sub-mapping manner, a transmission layer corresponding to each codeword is mapped to one DMRS port group, or a channel corresponding to each codeword during transmission is measured by one CSI-RS resource; the transmission layers are arranged according to a preset sequence.

19. The method of claim 17, wherein when the first mapping style includes a second target child mapping style, the method further comprises:

receiving the second target sub-mapping mode sent by the terminal, wherein the second target sub-mapping mode is the seventh sub-mapping mode and/or the eighth sub-mapping mode;

and determining the mapping relation between each code word and the transmission layer in the second target sub-mapping mode.

20. The method of claim 17, wherein the CSI comprises at least two Rank Indication (RI), and wherein a sum of the at least two RIs equals to a total number of transmission layers.

21. A terminal, comprising:

a first determining module, configured to determine at least one target mapping manner in a first mapping manner, where the first mapping manner includes at least two mapping manners, and the mapping manner is used to indicate a mapping relationship between a codeword and a transmission layer; the first mapping mode is associated with the number of demodulation reference signal port groups (DMRS port groups) used for transmission of an assumed Physical Downlink Shared Channel (PDSCH) when the CSI is reported or the number of channel state information reference signal resources (CSI-RS resources) used for measuring a channel when the CSI is calculated;

the calculation module is used for calculating Channel State Information (CSI) according to the target mapping mode;

and the first sending module is used for reporting the CSI to network side equipment.

22. A network-side device, comprising:

the terminal comprises a receiving module and a processing module, wherein the receiving module is used for receiving Channel State Information (CSI) reported by the terminal, the CSI is obtained by the terminal through calculation according to at least one target mapping mode, and the target mapping mode is determined according to at least two mapping modes in a first mapping mode; the first mapping mode is associated with the number of demodulation reference signal port groups (DMRS port groups) used for transmission of an assumed Physical Downlink Shared Channel (PDSCH) when the CSI is reported or the number of channel state information reference signal resources (CSI-RS resources) used for measuring a channel when the CSI is calculated.

23. A terminal, comprising: a transceiver, a memory, a processor, and a program stored on the memory and executable on the processor,

the processor is used for determining at least one target mapping mode in the first mapping modes and calculating Channel State Information (CSI) according to the target mapping mode; the first mapping mode comprises at least two mapping modes, and the mapping modes are used for representing the mapping relation between the code words and the transmission layer; the first mapping mode is associated with the number of demodulation reference signal port groups (DMRS port groups) used for transmission of an assumed Physical Downlink Shared Channel (PDSCH) when the CSI is reported or the number of CSI-RS resources used for measuring channel state information reference signal resources when the CSI is calculated;

the transceiver is configured to report the CSI to a network side device;

or,

the transceiver is configured to determine at least one target mapping manner in a first mapping manner, where the first mapping manner includes at least two mapping manners, and the mapping manner is used to indicate a mapping relationship between a codeword and a transmission layer;

calculating Channel State Information (CSI) according to the target mapping mode;

and reporting the CSI to network side equipment.

24. The terminal of claim 23, wherein the determining at least one target mapping manner in the first mapping manner comprises any one of:

the protocol appoints in advance to determine the target mapping mode according to the mapping relation between the number of transmission layers and the first mapping mode;

selecting the target mapping mode from the first mapping modes;

and determining the target mapping mode according to target information sent by the network side equipment, wherein the target information is used for indicating the target mapping mode or indicating a second mapping mode, the second mapping mode is used for a terminal to select the target mapping mode, and the second mapping mode is at least two mapping modes in the first mapping mode.

25. The terminal of claim 24, wherein when the target mapping scheme is selected from the first mapping schemes, or when the target mapping scheme is determined according to target information sent by a network side device, and the target information is used to indicate the second mapping scheme, the transceiver is further configured to:

and sending indication information to the network side equipment, wherein the indication information is used for indicating the target mapping mode.

26. The terminal of claim 23, wherein when reporting the CSI and assuming that one demodulation reference signal port group DMRS port group is used for transmission of a PDSCH or one CSI-RS resource is used for measurement channel in calculating the CSI, the first mapping method comprises at least two of the following mapping methods:

a first sub-mapping mode defined by Rel-15 of the new air interface NR;

a second sub-mapping mode defined by Long Term Evolution (LTE);

a predefined third sub-mapping manner, wherein the third sub-mapping manner includes: when the number of the transmission layers is N-4, a single code is adopted, and N is an integer which is more than 4 and less than 9; when the number of the transmission layers is N, both the code word 0 and the code word 1 are mapped to at least one transmission layer, the layers corresponding to the code word 0 and the code word 1 are not overlapped, and the sum of the number of the transmission layers corresponding to the code word 0 and the code word 1 is equal to N;

a predefined fourth sub-mapping manner, wherein the fourth sub-mapping manner includes: when the number of the transmission layers is 1 layer, a single code is adopted; when the number of the transmission layers is M, both the codeword 0 and the codeword 1 are mapped to at least one transmission layer, the layers corresponding to the codeword 0 and the codeword 1 are not overlapped, the sum of the number of the transmission layers corresponding to the codeword 0 and the codeword 1 is equal to M, and M is an integer greater than 1 and less than 9.

27. The terminal of claim 23, wherein the first mapping scheme comprises at least two of the following mapping schemes when at least two DMRS port groups are assumed for PDSCH transmission during reporting the CSI or when at least two CSI-RS resources are used for measuring channels during calculating the CSI:

a fifth sub-mapping mode defined by Rel-15 of the new air interface NR;

a sixth sub-mapping mode defined by Long Term Evolution (LTE);

a predefined seventh sub-mapping manner, wherein the seventh sub-mapping manner includes: when the number of the transmission layers is 2 to 4, a single code is adopted; when the number of the transmission layers is N, both the code word 0 and the code word 1 are mapped to at least one transmission layer, the layers corresponding to the code word 0 and the code word 1 are not overlapped, the sum of the number of the transmission layers corresponding to the code word 0 and the code word 1 is equal to N, and N is an integer which is more than 4 and less than 9;

a predefined eighth sub-mapping manner, where the eighth sub-mapping manner includes: when the number of the transmission layers is M, both the codeword 0 and the codeword 1 are mapped to at least one transmission layer, the layers corresponding to the codeword 0 and the codeword 1 are not overlapped, the sum of the number of the transmission layers corresponding to the codeword 0 and the codeword 1 is equal to M, and M is an integer greater than 1 and less than 9.

28. A network-side device, comprising: a transceiver, a memory, a processor, and a program stored on the memory and executable on the processor,

the transceiver is used for receiving Channel State Information (CSI) reported by a terminal, wherein the CSI is obtained by the terminal through calculation according to at least one target mapping mode, and the target mapping mode is determined according to at least two mapping modes in a first mapping mode; the first mapping mode is associated with the number of demodulation reference signal port groups (DMRS port groups) used for transmission of an assumed Physical Downlink Shared Channel (PDSCH) when the CSI is reported or the number of channel state information reference signal resources (CSI-RS resources) used for measuring a channel when the CSI is calculated.

29. The network-side device of claim 28, wherein when it is assumed that one demodulation reference signal port group DMRS port group is used for transmission of the PDSCH during reporting the CSI or when one CSI-RS resource is used for measuring a channel during calculating the CSI, the first mapping method includes at least two of the following mapping methods:

a first sub-mapping mode defined by Rel-15 of the new air interface NR;

a second sub-mapping mode defined by Long Term Evolution (LTE);

a predefined third sub-mapping manner, wherein the third sub-mapping manner includes: when the number of the transmission layers is N-4, a single code is adopted, and N is an integer which is more than 4 and less than 9; when the number of the transmission layers is N, both the code word 0 and the code word 1 are mapped to at least one transmission layer, the layers corresponding to the code word 0 and the code word 1 are not overlapped, and the sum of the number of the transmission layers corresponding to the code word 0 and the code word 1 is equal to N;

a predefined fourth sub-mapping manner, wherein the fourth sub-mapping manner includes: when the number of the transmission layers is 1 layer, a single code is adopted; when the number of the transmission layers is M, both the codeword 0 and the codeword 1 are mapped to at least one transmission layer, the layers corresponding to the codeword 0 and the codeword 1 are not overlapped, the sum of the number of the transmission layers corresponding to the codeword 0 and the codeword 1 is equal to M, and M is an integer greater than 1 and less than 9.

30. The network-side device of claim 28, wherein the first mapping manner comprises at least two mapping manners as follows, under the condition that at least two DMRS port groups are used for PDSCH transmission during reporting of the CSI or at least two CSI-RS resources are used for channel measurement during the CSI calculation:

a fifth sub-mapping mode defined by Rel-15 of the new air interface NR;

a sixth sub-mapping mode defined by Long Term Evolution (LTE);

a predefined seventh sub-mapping manner, wherein the seventh sub-mapping manner includes: when the number of the transmission layers is 2 to 4, a single code is adopted; when the number of the transmission layers is N, both the code word 0 and the code word 1 are mapped to at least one transmission layer, the layers corresponding to the code word 0 and the code word 1 are not overlapped, the sum of the number of the transmission layers corresponding to the code word 0 and the code word 1 is equal to N, and N is an integer which is more than 4 and less than 9;

a predefined eighth sub-mapping manner, where the eighth sub-mapping manner includes: when the number of the transmission layers is M, both the codeword 0 and the codeword 1 are mapped to at least one transmission layer, the layers corresponding to the codeword 0 and the codeword 1 are not overlapped, the sum of the number of the transmission layers corresponding to the codeword 0 and the codeword 1 is equal to M, and M is an integer greater than 1 and less than 9.

31. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements the steps in the channel state information reporting method according to any one of claims 1 to 10, or which, when being executed by a processor, implements the steps in the channel state information reporting method according to any one of claims 11 to 20.

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