Channel state information reporting method, terminal and network side equipment

文档序号：1345626 发布日期：2020-07-21 浏览：37次中文

阅读说明：本技术 一种信道状态信息上报方法、终端和网络侧设备 (Channel state information reporting method, terminal and network side equipment ) 是由苏昕王蒙军高秋彬陈润华于 2019-01-11 设计创作，主要内容包括：本发明实施例提供一种信道状态信息上报方法、终端和网络侧设备,该方法包括：在第一映射方式中确定至少一个目标映射方式,所述第一映射方式包括至少两个映射方式,所述映射方式用于表示码字与传输层的映射关系；根据所述目标映射方式计算信道状态信息CSI；向网络侧设备上报所述CSI。本发明实施例通过定义多种映射方式,并在多种映射方式中确定目标映射方式进行CSI的计算和上报。因此,在不同的传输的过程中,可以采用不同的映射方式进行CSI的计算和上报,从而可以提高CSI上报的灵活性,以支持多点协作传输。(The embodiment of the invention provides a method for reporting channel state information, a terminal and network side equipment, wherein the method comprises 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; calculating Channel State Information (CSI) according to the target mapping mode; and reporting the CSI to network side equipment. The embodiment of the invention defines a plurality of mapping modes and determines a target mapping mode in the plurality of mapping modes to calculate and report the CSI. Therefore, in different transmission processes, different mapping modes can be adopted for calculating and reporting the CSI, so that the flexibility of CSI reporting can be improved to support coordinated multipoint transmission.)

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;

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 according to claim 1, 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 manner defined by L TE;

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 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-RSresource groups 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 manner defined by L TE;

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:

and 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.

12. The method of claim 11, wherein the terminal determining the target mode 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;

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 manner defined by L TE;

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-RSresource 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 manner defined by L TE;

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 transport layer corresponding to each codeword is mapped to a dmrport group, respectively, or a channel corresponding to each codeword during transmission is measured by a CSI-RS resource, respectively; 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 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.

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

alternatively, the first and second electrodes may be,

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;

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, the first mapping method is under a condition that one demodulation reference signal port set dmrs port group is assumed to be used for transmission of a physical downlink shared channel PDSCH or when one channel state information reference signal resource CSI-RS resource is used for measuring a channel when calculating the CSI, and the first mapping method includes at least two mapping methods as follows:

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

a second sub-mapping manner defined by L TE;

27. The terminal of claim 23, 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-RSresource groups are used for measuring channels when calculating the CSI:

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

a sixth sub-mapping manner defined by L TE;

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.

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 manner defined by L TE;

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-RSresource groups 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 manner defined by L TE;

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.

Technical Field

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

Background

The feedback of Channel State Information (CSI) determines the performance of Multiple-Input Multiple-Output (MIMO) transmission, so that the feedback plays a role in the whole MIMO design, in a long-Term Evolution (L ong Term Evolution, L TE) system, a plurality 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, the design causes dispersion and complexity of different transmission schemes and Information feedback, in order to avoid introducing Multiple feedback types/sub-feedback types in a 5G system, a CSI feedback framework is designed, the system design separates measurement resources and measurement operations from specific reporting operations by decoupling the CSI measurement and the CSI feedback modes, and supports different MIMO transmission modes in a plurality of scenes and a plurality of frequency bands in a more flexible manner.

In a New Radio (NR) system, CSI may include a Channel Quality Indicator (CQI), a Precoding Matrix Indicator (PMI), a CSI reference Signal (CSI-RS) resource Indicator, a Synchronization Signal Block Resource Indicator (SSBRI), a layer Indicator (L a layer Indicator, L I), a Rank Indicator (RI), and L1-RSRP, wherein SSBRI, L I, and L1-RSRP are feedback quantities on the basis of CSI feedback of a L TE system. L I is used to indicate a strongest column in PMI for PT-RS reference Signal mapping.ssbri and L1-RSRP are used for beam management, one indicating a beam index, and the other indicating a beam strength.

According to the principle of decoupling the CSI measurement and the CSI feedback, the system configures N more than or equal to 1 Reporting feedback settings (Reporting Setting) for Reporting different measurement results and M more than or equal to 1 CSI-RS measurement Resource settings (Resource Setting) for each terminal. Each Reporting Setting is associated with 1 or more Resource Setting 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, and for setting 0, the results of three measurement sets are reported, while setting 1, the result of one measurement set is reported.

The Reporting setting includes the following parameter configurations: CSI feedback parameters (report quality), codebook configuration, time-domain behavior of CSI feedback, frequency-domain granularity of PMI and CQI, and measurement constraint configuration. Wherein the CSI feedback parameter is used for indicating whether the UE performs beam management related feedback or CSI acquisition related feedback.

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

Wideband or subband feedback is supported in NR. The size of the sub-band reported by the sub-band CSI is related to the Bandwidth (Bandwidth Part, BWP) actually used by the terminal, and the Bandwidth (since the 5G system Bandwidth is generally wider, the whole system Bandwidth is usually divided into BWPs with different sizes from the viewpoint of power saving, and each terminal performs transmission and reception within the allocated BWP Bandwidth), as shown in the following table. The subband size including 2 candidates for each BWP configuration bandwidth may be configured through Radio Resource Control (RRC). When the sub-band CSI is reported, the plurality of sub-bands may be continuously configured in the frequency domain or discontinuously configured in the frequency domain.

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

Resource setting is used for channel or interference measurement. Each resource setting contains S ≧ 1 resource set, and each resource set contains Ks ≧ 1 CSI-RS resource. NR supports periodic, semi-persistent and aperiodic resource setting, with the time domain behavior configured in the resource setting. For periodic and semi-persistent resource setting, only one resource set can be configured, i.e., S ═ 1. Aperiodic resource setting can configure one or more resource sets. In order to distinguish between CSI acquisition and beam management, a beam repetition indication parameter repetition is also introduced, which is configured in a resource set to indicate whether CSI-RS in the resource set is used for beam management and whether to transmit using a repeated beam.

To improve the coverage at the cell edge and provide more balanced quality of service within the service area, multipoint coordination is an important technical means in NR systems. Considering the deployment condition, the frequency band and the antenna state of the NR system, the application of the coordinated multi-point transmission technology in the NR system has a more significant practical significance. Firstly, from the perspective of network morphology, the network deployment in a manner of centralized processing of a large number of distributed access points + baseband is more beneficial to providing a balanced user experience rate, and significantly reduces the time delay and signaling overhead caused by handover. With the increase of frequency bands, relatively dense deployment of access points is also required from the viewpoint of ensuring network coverage. In the high frequency band, as the integration level of the active antenna device is increased, the modularized active antenna array is more likely to be adopted. The antenna array of each Transmission Reception Point (TRP) can be divided into several relatively independent antenna sub-arrays (or antenna panels), so that the form and port number of the whole array plane can be flexibly adjusted according to the deployment scene and the service requirement. And the panel or the TRP can be connected by optical fibers, so that more flexible distributed deployment can be carried out. In the millimeter wave band, as the wavelength is reduced, the blocking effect generated by obstacles such as a human body or a vehicle is more remarkable. In this case, from the viewpoint of ensuring the link connection robustness, the adverse effect of the blocking effect can be reduced by performing transmission/reception from a plurality of beams at a plurality of angles by using cooperation between a plurality of TRPs or panels.

The coordinated multi-point transmission technique can be roughly divided into coherent and non-coherent transmission according to the mapping relation of the transmission signal flow to a plurality of TRPs/panels. Wherein, in coherent transmission, each data layer is mapped onto a plurality of TRPs/panels by the weighting vector. And in non-coherent transmission, each data stream is mapped onto only a portion of the TRP/panel. Coherent transmission has higher requirements on synchronization between transmission points and transmission capability of backhaul, and is sensitive to many non-ideal factors in real deployment conditions. Relatively speaking, the non-coherent transmission is less affected by the above factors, and therefore is an important consideration for the NR multipoint transmission technique.

Currently, a fixed mapping mode is usually adopted for CSI calculation in single-point transmission, for example, an L ET mapping mode or a Rel-15 defined mapping mode in an NR system is adopted for CSI reporting.

Disclosure of Invention

The embodiment of the invention provides a method, a terminal and a network side device for reporting channel state information, which aim to solve the problem of single reporting mode of the channel state information.

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

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

and reporting the CSI to network side equipment.

Optionally, the determining at least one target mapping manner in the first mapping manner includes 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 sending indication information to the network side equipment, wherein the indication information is used for indicating the target mapping mode.

Optionally, when it is assumed that a demodulation reference signal port group DMRS port group is used for transmission of a PDSCH during reporting the CSI or when a CSI-RS resource is used for measuring a channel during calculating the CSI, the first mapping method includes at least two mapping methods as follows:

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

a second sub-mapping manner defined by L TE;

Optionally, when the first mapping manner includes a first target sub-mapping manner and the transmission layers are arranged according to a preset sequence, the method further includes:

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

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

Optionally, when it is assumed that at least two DMRS port groups are used for PDSCH transmission during reporting of the CSI or when at least two CSI-RS resources are used for measuring a channel during calculating the CSI, the first mapping method includes at least two mapping methods as follows:

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

a sixth sub-mapping manner defined by L TE;

Optionally, 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 in transmission is obtained through one CSI-RS resource measurement; the transmission layers are arranged according to a preset sequence.

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

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

The embodiment of the invention also provides a method for reporting the channel state information, which is applied to network side equipment and comprises the following steps:

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

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

a second sub-mapping manner defined by L TE;

Optionally, when the first mapping manner includes a first target sub-mapping manner and the transmission layers are arranged according to a preset sequence, the method further includes:

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

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

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

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.

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

a sixth sub-mapping manner defined by L TE;

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

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.

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

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

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.

An embodiment of the present invention further provides a network side device, which is characterized by including:

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

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

alternatively, the first and second electrodes may be,

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

and reporting the CSI to network side equipment.

Optionally, the determining at least one target mapping manner in the first mapping manner includes 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 sending indication information to the network side equipment, wherein the indication information is used for indicating the target mapping mode.

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

a second sub-mapping manner defined by L TE;

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

a sixth sub-mapping manner defined by L TE;

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

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

a second sub-mapping manner defined by L TE;

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

a sixth sub-mapping manner defined by L TE;

The embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps in the method for reporting channel state information on a terminal side provided in the embodiment of the present invention, or the computer program, when executed by the processor, implements the steps in the method for reporting channel state information on a network side device provided in the embodiment of the present invention.

The embodiment of the invention defines a plurality of mapping modes and determines a target mapping mode in the plurality of mapping modes to calculate and report the CSI. Therefore, in different transmission processes, different mapping modes can be adopted for calculating and reporting the CSI, so that the flexibility of CSI reporting can be improved to support coordinated multipoint transmission.

Drawings

FIG. 1 is a schematic diagram of a network architecture to which embodiments of the present invention are applicable;

fig. 2 is a schematic diagram of a method for reporting channel state information according to an embodiment of the present invention;

fig. 3 is a schematic diagram illustrating transmission assumptions for reporting CSI in a method for reporting CSI according to an embodiment of the present invention;

fig. 4 is a schematic diagram illustrating transmission assumptions for reporting CSI in a method for reporting CSI according to an embodiment of the present invention;

fig. 5 is a schematic diagram of another method for reporting channel state information according to an embodiment of the present invention;

fig. 6 is a structural diagram of a terminal according to an embodiment of the present invention;

fig. 7 is a structural diagram of a network side device according to an embodiment of the present invention;

fig. 8 is a block diagram of another terminal provided in an embodiment of the present invention;

fig. 9 is a block diagram of another network-side device according to an embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given 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 the embodiment of the present invention is applicable, and as shown in fig. 1, the network structure includes a terminal 11 and a network side Device 12, where the terminal 11 may be a User Equipment (UE) or other terminal devices, such as a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a laptop Computer (L AP Computer), a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), or a Wearable Device (Wearable Device), and it should be noted that a 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 a Device that directly controls the terminal on other network sides, specifically, the network side Device 12 may be a base station, such as a macro station, a L TE eNB, a 5G NR, and the like, and the network side Device may also be a small station, such as a low power node L (PN: Point), a transit Point, an AP, or a central Point management node (AP), and may be a network side Device that a network side management node (trpcu) and a central node (node).

Referring to fig. 2, fig. 2 is a flowchart of a method for reporting channel state information according to an embodiment of the present invention, and as shown in fig. 2, the method for reporting channel state information, applied to a terminal, includes the following steps:

step 201, determining 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 a mapping relationship between a codeword and a transmission layer;

in this embodiment of the present invention, the specific definition of the first mapping manner may be set according to actual needs, for example, the first mapping manner may include a mapping manner defined by Rel-15 of the new air interface NR, a mapping manner defined by long term evolution L TE, and other redefined mapping manners, which will be described in detail in the following embodiments.

The target mapping manner may be a 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 scheme is a mapping scheme assumed by the terminal when calculating CSI.

Step 202, calculating Channel State Information (CSI) according to the target mapping mode;

after determining the target mapping manner, CSI may be estimated, and parameters of the CSI may include one or more of CQI, PMI, CSI-RS resource indicator, SSBRI, L I, RI, and L1-RSRP.

And step 203, reporting the CSI to a network side device.

After the CSI is obtained through calculation, the CSI may be sent to the network side device, and a specific sending method may be set according to actual needs, which is not further described herein. Specifically, when the number of the target mapping manners is at least two, the CSI calculated and obtained according to different target mapping manners may be reported.

It should be noted that the scheme for determining the first target mapping manner may be set according to actual needs, for example, in this embodiment, the step 201 includes:

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;

Specifically, for scheme 1: the protocol pre-agrees to determine the target mapping mode according to the mapping relation between the number of transmission layers and the first mapping mode. At this time, the number of code sub-layers is determined by the number of transmission layers.

For scheme 2: selecting the target mapping mode from the first mapping modes; at this time, the terminal may autonomously select the target mapping manner, and a specific selection rule may be set according to actual needs, which is not further described herein.

For scheme 3: and determining the target mapping mode according to the target information sent by the network side equipment. At this time, in an embodiment, the second mapping method indicated by the target information is the target mapping method; in another embodiment, the terminal may select a part or all of the second mapping methods indicated by the target information as the target mapping methods.

In this embodiment, the target information may be configuration information or indication information, and is not further limited herein.

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

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

It should be noted that the first mapping manner includes a plurality of different types, which will be described in detail below.

In an optional embodiment, when reporting the CSI, assuming that a Demodulation Reference Signal (DMRS) port group is used for transmission of a PDSCH (physical downlink shared channel) or when a CSI-RS resource is used for measuring a channel when calculating the CSI, the first mapping method includes at least two mapping methods as follows:

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

a second sub-mapping manner defined by L TE;

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

rank1-4 (i.e., the number of transmission layers is 1 to 4), a single codeword is used;

rank5-8 (i.e., the number of transmission layers is 5 to 8), two codewords are used; wherein the content of the first and second substances,

rank 5: codeword 0 maps to layers 0 and 1 and codeword 1 maps to layers 2,3, and 4.

Rank 6: codeword 0 maps to layers 0,1, and 2, and codeword 1 maps to layers 3,4, and 5.

Rank 7: codeword 0 maps to layers 0,1, and 2, and codeword 1 maps to layers 3,4, 5, and 6.

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

The second sub-mapping manner may specifically be:

rank1, a single codeword is used;

when Rank2-8, two code words are used; wherein the content of the first and second substances,

rank2, codeword 0 maps to layer 0 and codeword 1 maps to layer 1.

Rank3, codeword 0 maps to layer 0 and codeword 1 maps to layers 1 and 2.

Rank4, codeword 0 maps to layers 0 and 1 and codeword 1 maps to layers 2 and 3.

rank5, codeword 0 maps to layers 0 and 1 and codeword 1 maps to layers 2,3, and 4.

Rank6, codeword 0 maps to layers 0,1, and 2, and codeword 1 maps to layers 3,4, and 5.

Rank7, codeword 0 maps to layers 0,1, and 2, and codeword 1 maps to layers 3,4, 5, and 6.

Rank8, codeword 0 maps to layers 0,1, 2, and 3, and codeword 1 maps to layers 4,5, 6, and 7.

The third sub-mapping manner may be:

rank1-4, a single codeword is used;

rank5-8, two codewords are used; wherein the content of the first and second substances,

rank 5: 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 5; for example, the combination of the layers to which codeword 0 and codeword 1 are mapped may be {0,1234 }, {01,234 }, { 012, 34} or { 0123, 4}, and may be a combination of some or all of them. Specifically, the set {0,1234 } indicates that codeword 0 is mapped to layer 0, and codeword 1 is mapped to layers 1,2, 3, and 4, and the meanings indicated by the other sets are not repeated herein.

Rank 6: 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 6; for example, the combination of the layer to which codeword 0 and codeword 1 are mapped may be {0,12345 }, {01,2345 }, { 012,345 }, { 0123, 45 }, or { 01234, 5}, or some or all combinations thereof.

Rank 7: 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 7; for example, the combination of the layer to which codeword 0 and codeword 1 are mapped may be {0,123456 }, {01,23456 }, { 012,3456 }, { 0123,456 }, { 01234, 56}, or { 012345, 6}, or some or all combinations thereof.

Rank 8: 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 8; for example, the combination of the layer to which codeword 0 and codeword 1 are mapped may be {0,1234567 }, {01,234567 }, { 012,34567 }, { 0123,4567 }, { 01234,567 } or { 012345, 67}, { 0123456, 7}, or some or all combinations thereof.

The fourth sub-mapping manner may be:

rank1, a single codeword is used;

when Rank2-8, two code words are used; wherein the content of the first and second substances,

rank 2: codeword 0 maps to layer 0 and codeword 1 maps to layer 1; or codeword 0 maps to layer 1 and codeword 1 maps to layer 0.

Rank 3: 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 3; for example, the combination of the layer to which codeword 0 and codeword 1 are mapped may be {0, 12 }, {01, 2}, or { 02, 1}, or some or all of them may be combined.

Rank 4: 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 4; for example, the combination of the layers to which codeword 0 and codeword 1 are mapped may be {0,123 }, {01, 23 }, { 012, 3}, or some or all of them may be combined.

Rank 8: 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 7; for example, the combination of the layer to which codeword 0 and codeword 1 are mapped may be {0,1234567 }, {01,234567 }, { 012,34567 }, { 0123,4567 }, { 01234,567 } or { 012345, 67}, { 0123456, 7}, or some or all combinations thereof.

In this embodiment, as shown in fig. 3, it is assumed that only one DMRS port group is used for PDSCH transmission during CSI reporting, or only one CSI-RS resource is used for measuring a channel during CSI calculation. For example, corresponding to a Dynamic Point Switching (DPS) transmission (one TRP/panel is dynamically selected) or a single transmission using only the currently accessed TRP/panel.

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

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

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

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

For example, rank2 is the rank of 01 for each transport layer; rank3, the transmission layers are ranked as 012; rank4, the transmission layers are ranked as 0123; rank5, each transport layer is ranked as 01234; rank6, the transmission layers are ranked as 012345; rank7, the transmission layers are ranked as 0123456; rank8 the transport layers are ordered as 01234567. When the reported equal layer numbers of two codewords are RI-1 and RI-2 (the sum of RI-1 and RI-2 equals rank), the mapping relationship from codeword to layer can be considered as: codeword 0 maps to the first RI-1 layers and codeword 1 maps to the last 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 the CSI, assuming that at least two DMRS portgroups are used for PDSCH transmission or when at least two CSI-RS resources are used for measuring a channel when calculating the CSI, the first mapping method includes at least two mapping methods as follows:

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

a sixth sub-mapping manner defined by L TE;

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

rank2-4 (i.e., the number of transmission layers is 2 to 4), a single codeword is used;

rank5-8 (i.e., the number of transmission layers is 5 to 8), two codewords are used; wherein the content of the first and second substances,

rank 5: codeword 0 maps to layers 0 and 1 and codeword 1 maps to layers 2,3, and 4.

Rank 6: codeword 0 maps to layers 0,1, and 2, and codeword 1 maps to layers 3,4, and 5.

Rank 7: codeword 0 maps to layers 0,1, and 2, and codeword 1 maps to layers 3,4, 5, and 6.

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

The sixth sub-mapping manner may specifically be: