WO2021057505A1

WO2021057505A1 - Method and device for determining mapping relationship between tci state and dmrs, and method and device for configuring mapping relationship between tci state and dmrs

Info

Publication number: WO2021057505A1
Application number: PCT/CN2020/114702
Authority: WO
Inventors: 李岩; 金婧; 王飞; 郑毅; 王菡凝; 王启星
Original assignee: 中国移动通信有限公司研究院; 中国移动通信集团有限公司
Priority date: 2019-09-27
Filing date: 2020-09-11
Publication date: 2021-04-01
Also published as: CN112583547B; CN112583547A

Abstract

Embodiments of the present application provide a method and device for determining a mapping relationship between a TCI state and a DMRS, and a method and device for configuring a mapping relationship between a TCI state and a DMRS. The method for determining a mapping relationship between a TCI state and a DMRS comprises: receiving downlink control information or high-level parameter configuration information; and determining correspondences between N TCI states and M DMRS CDM groups or Y DMRS ports, wherein N, M, and Y are all integers greater than or equal to 1. By determining correspondences between TCI states and DMRS CDM groups or DMRS ports, the embodiments of the present application solve the problem of correspondences between multiple TCI states indicated by DCI received by a terminal and PDSCHs sent by multiple TRPs.

Description

Method and equipment for determining and configuring the mapping relationship between TCI status and DMRS

Cross-references to related applications

This application claims the priority of Chinese Patent Application No. 201910927902.2 filed in China on September 27, 2019, the entire content of which is incorporated herein by reference.

Technical field

The present disclosure relates to the field of wireless communication technology, and in particular to a method and device for determining and configuring the mapping relationship between TCI status and DMRS.

Background technique

Multi-Transmission and Reception Point (Multi-TRP) refers to multiple transmission points that cooperate to transmit data for one terminal or jointly receive data sent by one terminal. Multiple transmission points participating in cooperation usually refer to multiple cells. , These cells can come from the same base station, or they can be cells under different base stations.

In Multi-TRP, there is a working mode of a communication scenario: a transmission and reception point (Transmission and Reception Point, TRP) sends a physical downlink control channel (Physical Downlink Control Channel, PDCCH), and multiple TRPs all send a physical downlink Shared channel (Physical Downlink Shared Channel, PDSCH).

The step of indicating the transmission configuration indicator (TCI) status in the downlink control information (Downlink Control Information, DCI) includes three steps: (1) Radio Resource Control (RRC) can configure N types of TCI status; (2) Multiple Access Channel (MAC) channel resource (Channel Element, CE) activates 8 groups of transmission configuration indication states (TCI state); (3) In the downlink control information (Downlink Control Information, DCI) Three digits are used to indicate one of the groups. This group indicates multiple TCI states that match the PDSCHs of multiple TRPs, but does not contain specific mapping relationships.

Therefore, when the terminal receives multiple TCI states indicated by the DCI, it does not know the specific correspondence between the multiple TCI states and the received PDSCHs sent by the multiple TRPs. The TCI status is mainly used for the terminal to determine the large-scale related information and spatial reception beam information referenced by the received PDSCH. If the terminal does not know the correspondence between each PDSCH and TCI, it cannot determine the TCI status of the PDSCH and cannot determine the demodulation PDSCH. The large-scale related information and the spatial beam information of the received PDSCH.

Summary of the invention

One purpose of the embodiments of the present disclosure is to provide a method and device for determining and configuring the mapping relationship between TCI state and demodulation reference signal (Demodulation Reference Signal, DMRS), and determining TCI state and DMRS code division multiplexing group (Code Division Multiplexing, CDM) or DMRS port correspondence, and then solve the one-to-one or one-to-many or many-to-one correspondence between the multiple TCI states indicated by the DCI and the PDSCH sent by multiple TRPs, so as to determine the demodulation of the PDSCH sent by different TRPs The large-scale related information and the spatial beam information of the PDSCH received by different TRPs.

In order to solve the above technical problems, the present disclosure is implemented as follows:

In the first aspect, a method for determining the mapping relationship between TCI status and DMRS is provided, which is applied to a terminal, including: receiving downlink control information or high-level parameter configuration information; determining N TCI status and M DMRS CDM groups or Y DMRS ports Correspondence, where N, M, and Y are all positive integers greater than or equal to 1.

Optionally, the downlink control information includes: the group number of the DMRS CDM group corresponding to the first TCI state, which is smaller than the group number of the DMRS CDM group corresponding to the second TCI state; or, the first TCI state corresponds to the DMRS The group number of the CDM group is greater than the group number of the DMRS CDM group corresponding to the second TCI state.

Optionally, the downlink control information includes: the CDM group number of the DMRS port corresponding to the first TCI state is smaller than the CDM group number of the DMRS port corresponding to the second TCI state; or, the first The CDM group number of the DMRS port corresponding to one TCI state is greater than the CDM group number of the DMRS port corresponding to the second TCI state.

Optionally, the high-level parameter configuration information includes: configuring X TCI state groups, and each TCI state group is associated with a designated parameter, where X is a positive integer greater than or equal to 1.

In the second aspect, a method for configuring the mapping relationship between TCI status and DMRS is also provided, which is applied to the network side and includes: sending downlink control information or high-level parameter configuration information, and the downlink control information or high-level parameter configuration information is used by the terminal to determine N Correspondence between TCI status and M DMRS CDM groups or Y DMRS ports, where N, M, and Y are all positive integers greater than or equal to 1.

Optionally, the downlink control information includes: the CDM group number of the DMRS port corresponding to the first TCI state is smaller than the CDM group number of the DMRS port corresponding to the second TCI state;

Alternatively, the CDM group number of the DMRS port corresponding to the first TCI state is greater than the CDM group number of the DMRS port corresponding to the second TCI state.

In a third aspect, a terminal is also provided, including: a transceiver and a processor; the transceiver is configured to receive downlink control information or high-level parameter configuration information; and the processor is configured to determine N TCI states and M Correspondence between a DMRS CDM group or Y DMRS ports, where N, M, and Y are all positive integers greater than or equal to 1.

In a fourth aspect, a terminal is also provided, including: a transceiver module for receiving downlink control information or high-level parameter configuration information; a processing module for determining N TCI states and M DMRS CDM groups or Y DMRS ports Correspondence, where N, M, and Y are all positive integers greater than or equal to 1.

In a fifth aspect, a network-side device is also provided, including: a transceiver and a processor; the transceiver is configured to send downlink control information or high-level parameter configuration information, and the downlink control information or high-level parameter configuration information is used for The terminal determines the correspondence between N TCI states and M DMRS CDM groups or Y DMRS ports, where N, M, and Y are all positive integers greater than or equal to 1.

In a fifth aspect, there is also provided a terminal, including: a processor, a memory, and a processing program stored in the memory and capable of running on the processor the method for determining the TCI state and the mapping relationship, and the processor executes The method steps for determining the mapping relationship between the TCI state and the DMRS as described in the first aspect are realized.

In a sixth aspect, there is also provided a network-side device, including: a processor, a memory, and a processing program stored on the memory and capable of running on the processor for processing downlink control information, the processing program of the downlink control information When executed by the processor, the steps of the method for configuring the mapping relationship between the TCI state and the DMRS as described in the second aspect are implemented.

In a seventh aspect, a computer-readable storage medium is also provided. The computer-readable storage medium stores a processing program for downstream control information. When the processing program for downstream control information is executed by a processor, the implementation is as in the first aspect. Steps of the method for determining the mapping relationship between the TCI state and the DMRS or perform the steps of the method for configuring the mapping relationship between the TCI state and the DMRS as in the second aspect.

In the embodiments of the present disclosure, by receiving downlink control information or high-level parameter configuration information, the terminal can determine the corresponding relationship between TCI status and DMRS CDM group or DMRS port according to the received downlink control information or high-level parameter configuration information, thereby solving DCI The one-to-one or one-to-many or many-to-one correspondence between the indicated multiple TCI states and the PDSCH sent by multiple TRPs to determine the large-scale related information of the PDSCH sent by different TRPs and receive PDSCH sent by different TRPs Space beam information.

Description of the drawings

FIG. 1 is a schematic diagram of a communication system provided by an embodiment of the disclosure;

2 is a schematic flowchart of a method for determining the mapping relationship between TCI status and DMRS according to an embodiment of the disclosure;

3 is a schematic flowchart of a method for configuring a mapping relationship between TCI status and DMRS according to an embodiment of the disclosure;

4A and 4B are schematic diagrams of a terminal structure provided by an embodiment of the disclosure;

5A and 5B are schematic structural diagrams of a network-side device provided by an embodiment of the disclosure;

FIG. 6 is a schematic structural diagram of a terminal according to an embodiment of the disclosure;

FIG. 7 is a schematic structural diagram of a network side device according to an embodiment of the disclosure.

detailed description

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by a person of ordinary skill in the art without creative work shall fall within the protection scope of the present disclosure.

In order to achieve the objectives of the present disclosure and other objectives proposed in this embodiment, an embodiment of the present disclosure provides a communication system. Referring to the communication system in FIG. 1, it is exemplarily shown that the communication system includes at least one terminal and at least one TRP, and the TRP may include TRP101, TRP102, and so on. In the embodiment of the present disclosure, in the communication between the terminal 801 and the network side, as shown in the figure, the terminal 801 can receive a TRP, such as the PDSCH sent by TRP101, and the terminal 801 communicates with the TRP101, and the TRP101 sends The terminal 801 transmits data. The terminal is within the coverage of at least two TRPs, and the terminal can receive PDSCHs sent by at least two TRPs, such as the PDSCH sent by TRP101 and the PDSCH sent by TRP102.

In the embodiments of the present disclosure, the PDSCH sent by the TRP generally adopts two different configuration principles. Under the principle of the first type of configuration, the PDSCH sent by different TRPs use different demodulation reference signal (Demodulation Reference Signal, DMRS) groups, and each DMRS code division multiplexing (Code Division Multiplexing, CDM) group contains multiple different DMRS ports, N PDSCHs can only select corresponding DMRS ports from N DMRS CDM groups respectively. For example: DMRS CDM group 0 = {port 0, port 1, port 4, port 5}; DMRS CDM group 1 = {port 2, port 3, port 6, port 7}, at this time two different PDSCHs can only be separated Select the corresponding DMRS port from the DMRS CDM group, PDSCH1 can use DMRS port 0, and PDSCH2 can use DMRS port 2. Optionally, under the second configuration principle, the PDSCH sent by N TRPs can select DMRS ports from more than N DMRS CDM groups, for example, DMRS CDM group 0 = {port 0, port 1, port 6, port 7} ; DMRS CDM group 1 = {port 2, port 3, port 8, port 9}, DMRS CDM group 2 = {port 4, port 5, port 10, port 11}, PDSCH1 can use DMRS port 0, PDSCH2 can use DMRS Port 4.

Referring to FIG. 2, FIG. 2 is a schematic flowchart of a method for determining the mapping relationship between TCI status and DMRS according to an embodiment of the present disclosure, which is applied to a terminal, and the specific steps are as follows:

Step 201: Receive downlink control information or high-level parameter configuration information;

Step 202: Determine the correspondence between N TCI states and M DMRS CDM groups or Y DMRS ports, where N, M, and Y are all positive integers greater than or equal to 1.

In the embodiment of the present disclosure, optionally, the downlink control information includes: semi-statically or dynamically indicating the mapping relationship between the TCI state and the DMRS CDM group in RRC/MAC CE/DCI or indicating in the DMRS port indication table The mapping relationship between TCI status and DMRS port is shown.

Optionally, the high-level parameter configuration information includes: in RRC, multiple TCI state groups are configured, and each TCI state group is associated with a designated parameter, and the designated parameter is associated with the CDM group or DMRS port through the TRP, so that you can know Correspondence between each TCI state and CDM group or DMRS port.

Optionally, the terminal determines N TCI states and M DMRS CDM groups or Y according to the received mapping relationship between the TCI state and DMRS CDM group, the mapping relationship between TCI state and DMRS port, or the specified parameters associated with the TCI state group. Correspondence of DMRS ports, where N, M, and Y are all positive integers greater than or equal to 1.

Through the steps in the above embodiments, when the terminal receives downlink control information or high-level parameter configuration information, it can determine the corresponding relationship between the N TCI states and M DMRS CDM groups or Y DMRS ports, and further determine N TCIs Correspondence between status and PDSCH sent by different TRPs.

In the embodiment of the present disclosure, optionally, the downlink control information includes: the mapping relationship between the TCI state and the DMRS CDM group; where the first TCI state corresponds to the group number of the DMRS CDM group, which is smaller than the second TCI state corresponds to The group number of the DMRS CDM group; or, the group number of the DMRS CDM group corresponding to the first TCI state is greater than the group number of the DMRS CDM group corresponding to the second TCI state.

The mapping relationship between the TCI state and the DMRS CDM group is a correspondence relationship between one or more TCI states and the DMRS CDM group. The correspondence between the one or more TCI states and the DMRS CDM group can be indicated by W bits in RRC/MAC CE/DCI.

Refer to Table 1. Table 1 is a mapping relationship between a TCI state and a DMRS CDM group provided by an embodiment of the present disclosure. In RRC/MAC CE/DCI, the mapping relationship between TCI status and DMRS CDM group is indicated semi-statically or dynamically.

Table 1: The mapping relationship between TCI status of DMRS configuration type 1 and DMRS CDM group

Specifically, 1 bit is used in RRC/MAC CE/DCI to indicate the mapping relationship between TCI status and DMRS CDM group: 0 indicates that the first TCI status 0 corresponds to DMRS CDM group 0, and the second TCI status 1 corresponds to DMRS CDM group 1. ; 1 indicates that the first TCI state 0 corresponds to DMRS CDM group 1, and the second TCI state 1 corresponds to DMRS CDM group 0.

Refer to Table 2. Table 2 is a mapping relationship between the TCI state and the DMRS CDM group provided by the embodiments of the present disclosure. In RRC/MAC CE/DCI, the mapping relationship between TCI status and DMRS CDM group is indicated semi-statically or dynamically.

Table 2: Mapping relationship between TCI status of DMRS configuration type 2 and DMRS CDM group

Specifically, 3 bits are used in RRC/MAC CE/DCI to indicate the mapping relationship between TCI status and DMRS CDM group: 000 indicates that the first TCI status 0 corresponds to DMRS CDM group 0 or the first TCI status 0 corresponds to DMRS CDM group 1 , The second TCI state 1 corresponds to DMRS CDM group 2; 001 indicates that the first TCI state 0 corresponds to DMRS CDM group 0, the second TCI state 1 corresponds to DMRS CDM group 1 or the second TCI state 0 corresponds to DMRS CDM group 2 .

It should be pointed out that Table 1 and Table 2 only indicate part of the mapping relationship between TCI status and DMRS CDM group, and the specific mapping relationship between TCI status and DMRS CDM group is not limited to the one shown in the table, but it is generally based on the TCI status and DMRS in this disclosure. The corresponding relationship between the TCI state and the DMRS CDM group obtained by the method steps for determining the mapping relationship all fall within the protection scope of the present disclosure.

The terminal can determine the corresponding relationship between the N TCI states and the M DMRS CDM groups by receiving the mapping relationship between the TCI status and the DMRS CDM group included in the downlink control information, and can further determine the N TCI status and multiple CDM groups. Correspondence of PDSCH sent by TRP.

In the embodiment of the present disclosure, optionally, the downlink control information includes: a mapping relationship between TCI status and DMRS port; wherein, the CDM group number of the DMRS port corresponding to the first TCI status is smaller than the first TCI status. The CDM group number of the DMRS port corresponding to the two TCI states; or, the CDM group number of the DMRS port corresponding to the first TCI state is greater than the CDM group number of the DMRS port corresponding to the second TCI state.

Optionally, the mapping relationship between the TCI status and the DMRS CDM port is: the DMRS port number corresponds to the CDM group number, each CDM group contains one or more ports, and the CDM corresponding to the DMRS port corresponding to the first TCI status One or two with the smallest group number in the group, or one or two with the largest group number in the CDM group corresponding to the DMRS port corresponding to the first TCI state.

For example: for DMRS type 1: the first TCI state corresponds to DMRS ports 0, 1, 4, 5 and DMRS ports 0, 1, 4, and 5 correspond to CDM group 0; the second TCI state corresponds to DMRS ports 2, 3, 6 , 7 and DMRS ports 2, 3, 6, 7 correspond to CDM group 1;

For DMRS type 2: The first TCI state corresponds to DMRS ports 0, 1, 6, and 7 and DMRS ports 0, 1, 6, and 7 correspond to CDM group 0; the second TCI state corresponds to DMRS ports 2, 3, 8, 9 Or DMRS ports 4, 5, 10, 11 and DMRS ports 2, 3, 8, 9 correspond to CDM group 1, DMRS ports 4, 5, 10, 11 correspond to CDM group 2;

Or the first TCI state corresponds to DMRS port 2, 3, 8, 9 or DMRS port 4, 5, 10, 11 and DMRS port 2, 3, 8, 9 corresponds to CDM group 1, DMRS port 4, 5, 10, 11 Corresponds to CDM group 2; the second TCI state corresponds to DMRS ports 0, 1, 6, and 7 and DMRS ports 0, 1, 6, and 7 correspond to CDM group 0.

Refer to Table 3, which is a mapping relationship between TCI status and DMRS port provided by the embodiments of the present disclosure.

Table 3: Antenna port(s) (1000+DMRS port), Dmrs-Type=1, MaxLength=1

Among them: Antenna port(s) is the antenna port, Dmrs-Type is the DMRS configuration type, and MaxLength is the longest length

Specifically, the DMRS port indication table of DCI in Rel-15 is enhanced so that it can indicate the mapping relationship between TCI status and DMRS port.

Refer to Table 4, which is a mapping relationship between TCI status and DMRS port provided by the embodiments of the present disclosure.

Table 4: Antenna port(s) (1000+DMRS port), dmrs-Type=2, maxLength=1

As shown in Table 3 and Table 4, the correspondence between one or more TCI states and DMRS ports in the mapping relationship between the TCI state and the DMRS port can be agreed in advance, for example, can be agreed through a protocol or standard. Since it is a pre-appointed mapping relationship between the TCI state and the DMRS port, this mapping relationship is default and can be universally applied and does not need to be issued by the network side.

See Table 5. Table 5 is a DMRS port provided by an embodiment of the present disclosure

Table 5: Antenna port(s) (1000+DMRS port), dmrs-Type=1, maxLength=1

In the embodiment of the present disclosure, optionally, the high-level parameter configuration information includes: configuring X TCI state groups, and each TCI state group is associated with a designated parameter, where X is a positive integer greater than or equal to 1.

Optionally, each TCI state group includes at least one TCI state.

Optionally, when the RRC configures the list of 128 candidate TCI states of the PDSCH, the candidate TCI states are divided into X groups, and each group corresponds to 1 TRP. The purpose of associating each TCI state group with a designated parameter is to make the terminal know when receiving the TCI state ID associated with the designated parameter that the TCI state is applied to the PDSCH sent by which TRP is received.

The specified parameter is associated with the DMRS CDM group or DMRS port: Since the specified parameter is associated with the TRP, and the TRP is associated with the corresponding DMRS CDM group or DMRS port, the TCI status is associated with the The DMRS CDM group or DMRS port corresponds. Furthermore, when the terminal receives the TCI state, it knows which TRP's PDSCH the TCI state is applied to receive.

For example, when the RRC configures the 128 candidate TCI state tables of the PDSCH, it divides the candidate TCI states into two groups, and each group corresponds to a PDSCH sent by a TRP.

When configured in RRC, 64 TCI states are associated with the first parameter, indicating that these 64 TCI states belong to the PDSCH of TRP1, and the other 64 TCI states are associated with the second parameter, indicating that these 64 TCI states belong to the PDSCH of TRP2. Therefore, when the terminal receives the TCI status ID associated with the first parameter, it knows that the TCI status should be applied to receive the PDSCH of TRP1 through the "recessive" correspondence between the TRP and the DMRS CDM group or DMRS port. When the TCI state ID of the second parameter is associated, it is known that the TCI state should be applied to receive the PDSCH of TRP2.

Referring to FIG. 3, FIG. 2 is a schematic flowchart of a method for configuring the mapping relationship between TCI status and DMRS according to an embodiment of the present disclosure, which is applied to the network side, and the specific steps are as follows:

Step 701: Send downlink control information or high-level parameter configuration information, where the downlink control information or high-level parameter configuration information is used by the terminal to determine the correspondence between N TCI states and M DMRS CDM groups or Y DMRS ports, where N, Both M and Y are positive integers greater than or equal to 1.

Through the steps of the above embodiments, the network side sends the downlink control information or high-level parameter configuration information to the terminal. When the terminal receives the above information, it can determine the N TCI states and M DMRS CDM groups or Y DMRS ports The correspondence relationship between the N TCI states and the PDSCH sent by different TRPs can be further determined.

In the embodiment of the present disclosure, optionally, sending the downlink control information includes: the mapping relationship between the TCI state and the DMRS CDM group; where the first TCI state corresponds to the group number of the DMRS CDM group, which is smaller than the second TCI state The group number of the corresponding DMRS CDM group; or, the group number of the DMRS CDM group corresponding to the first TCI state is greater than the group number of the DMRS CDM group corresponding to the second TCI state.

Specifically, DMRS configuration type 1: In RRC/MAC CE/DCI, 1 bit is used to indicate the mapping relationship between TCI status and DMRS CDM group: 0 indicates that the first TCI status 0 corresponds to DMRS CDM group 0, and the second TCI status 1 Corresponds to DMRS CDM group 1; 1 indicates that the first TCI state 0 corresponds to DMRS CDM group 1, and the second TCI state 1 corresponds to DMRS CDM group 0.

Or, DMRS configuration type 2: 3 bits are used in RRC/MAC CE/DCI to indicate the mapping relationship between TCI status and DMRS CDM group. For example, as shown in Figure 4, 000 indicates that the first TCI state 0 corresponds to DMRS CDM group 0 or the first TCI state 0 corresponds to DMRS CDM group 1, and the second TCI state 1 corresponds to DMRS CDM group 2; 001 indicates the first One TCI state 0 corresponds to DMRS CDM group 0, the second TCI state 1 corresponds to DMRS CDM group 1, or the second TCI state 0 corresponds to DMRS CDM group 2.

It should be pointed out that the specific mapping relationship between the TCI state and the DMRS CDM group is not limited to examples, but any corresponding relationship between the TCI state and the DMRS CDM group obtained according to the steps of the method for configuring the mapping relationship between the TCI state and the DMRS of the present disclosure belongs to the present disclosure. Within the scope of protection.

In the embodiment of the present disclosure, optionally, sending the downlink control information includes:

The mapping relationship between the TCI state and the DMRS port; wherein the CDM group number of the DMRS port corresponding to the first TCI state is smaller than the CDM group number of the DMRS port corresponding to the second TCI state; or, the first The CDM group number of the DMRS port corresponding to one TCI state is greater than the CDM group number of the DMRS port corresponding to the second TCI state.

Or, the first TCI state corresponds to DMRS port 2, 3, 8, 9 or DMRS port 4, 5, 10, 11 and DMRS port 2, 3, 8, 9 corresponds to CDM group 1, DMRS port 4, 5, 10, 11 corresponds to CDM group 2; the second TCI state corresponds to DMRS ports 0, 1, 6, and 7 and DMRS ports 0, 1, 6, and 7 correspond to CDM group 0.

Optionally, the mapping relationship between the TCI status and the DMRS port: For DMRS types 1 and 2, the DMRS port indication table of the DCI in Rel-15 can be enhanced to indicate the mapping relationship between the TCI status and the DMRS port .

In the embodiment of the present disclosure, optionally, sending the high-level parameter configuration information includes: configuring X TCI state groups, and each TCI state group is associated with a designated parameter, where X is a positive integer greater than or equal to 1.

Optionally, each TCI state group includes at least one TCI state

Refer to FIG. 4A and FIG. 4B, which are schematic diagrams of a terminal structure provided by an embodiment of the present disclosure. Referring to FIG. 4A, the terminal includes a transceiver 410 and a processor 420.

The transceiver 410 is configured to receive downlink control information or high-level parameter configuration information;

The processor 420 is configured to determine the correspondence between N TCI states and M DMRS CDM groups or Y DMRS ports according to the received downlink control information or high-level parameter configuration information, where N, M and Y are all A positive integer greater than or equal to 1.

Optionally, the downlink control information includes: a mapping relationship between TCI status and DMRS CDM group;

Among them, the group number of the DMRS CDM group corresponding to the first TCI state is smaller than the group number of the DMRS CDM group corresponding to the second TCI state;

Alternatively, the group number of the DMRS CDM group corresponding to the first TCI state is greater than the group number of the DMRS CDM group corresponding to the second TCI state.

Optionally, the downlink control information includes: a mapping relationship between a TCI state and a DMRS port; wherein the CDM group number of the DMRS port corresponding to the first TCI state is smaller than the DMRS port corresponding to the second TCI state The CDM group number;

Referring to FIG. 4B, the terminal includes a transceiver module 411 and a processing module 421.

The transceiver module 411 is configured to receive downlink control information or high-level parameter configuration information;

The determining module 421 is configured to determine the correspondence between N TCI states and M DMRS CDM groups or Y DMRS ports according to the received downlink control information or high-level parameter configuration information, where N, M and Y are all A positive integer greater than or equal to 1.

The terminal provided in the embodiments of the present disclosure can implement the various processes implemented by the terminal in the foregoing method embodiments. To avoid repetition, details are not described herein again.

Referring to FIG. 5A and FIG. 5B, it is a schematic structural diagram of a network side device provided by an embodiment of the present disclosure.

Referring to FIG. 5A, the network side includes a transceiver 510 and a processor 520.

The transceiver 510 is configured to send downlink control information or high-level parameter configuration information, and the downlink control information or high-level parameter configuration information is used by the terminal to determine the correspondence between N TCI states and M DMRS CDM groups or Y DMRS ports , Where N, M and Y are all positive integers greater than or equal to 1.

Referring to FIG. 5B, the network side device includes a transceiver module 511 and a processing module 521.

The transceiver module 511 is configured to send downlink control information or high-level parameter configuration information, and the downlink control information or high-level parameter configuration information is used by the terminal to determine the correspondence between N TCI states and M DMRS CDM groups or Y DMRS ports , Where N, M and Y are all positive integers greater than or equal to 1.

The network side device provided in the embodiments of the present disclosure can implement the various processes implemented on the network side in the foregoing method embodiments. To avoid repetition, details are not described herein again.

Referring to FIG. 6, FIG. 6 is a schematic structural diagram of a terminal according to another embodiment of the present disclosure. The network side device 6 includes a processor 610 and a memory 620. In the embodiment of the present disclosure, the terminal further includes: a computer program stored in the memory 620 and running on the processor 610, and the computer program is executed by the processor 910 to implement the following steps:

Receive downlink control information or high-level parameter configuration information;

According to the received downlink control information or high-level parameter configuration information, the correspondence between N TCI states and M DMRS CDM groups or Y DMRS ports is determined, where N, M, and Y are all positive integers greater than or equal to 1.

Optionally, when the computer program is executed by the processor 910, the following steps may also be implemented:

Referring to FIG. 7, FIG. 7 is a schematic structural diagram of a network side device according to another embodiment of the present disclosure. The network side device 7 includes a processor 710 and a memory 720. In the embodiment of the present disclosure, the terminal further includes: a computer program stored in the memory 720 and capable of running on the processor 710. The computer program is executed by the processor 710 to implement the following steps:

Send downlink control information or high-level parameter configuration information, where the downlink control information or high-level parameter configuration information is used by the terminal to determine the correspondence between N TCI states and M DMRS CDM groups or Y DMRS ports, where N, M, and Y Both are positive integers greater than or equal to 1.

Optionally, the following steps may also be implemented when the computer program is executed by the processor 710:

The embodiments of the present disclosure also provide a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, each of the embodiments of the method for determining the mapping relationship between the TCI state and the DMRS is realized. The process, or when the computer program is executed by the processor, realizes each process of the embodiment of the method for configuring the mapping relationship between the TCI state and the DMRS, and can achieve the same technical effect. In order to avoid repetition, it will not be repeated here. Wherein, the computer-readable storage medium, such as read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk, or optical disk, etc.

It should be noted that in this article, the terms "include", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, It also includes other elements not explicitly listed, or elements inherent to the process, method, article, or device. If there are no more restrictions, the element defined by the sentence "including a..." does not exclude the existence of other identical elements in the process, method, article, or device that includes the element.

Through the description of the above implementation manners, those skilled in the art can clearly understand that the above-mentioned embodiment method can be implemented by means of software plus the necessary general hardware platform, of course, it can also be implemented by hardware, but in many cases the former is better.的实施方式。 Based on this understanding, the technical solution of the present disclosure essentially or the part that contributes to the related technology can be embodied in the form of a software product, and the computer software product is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk). ) Includes several instructions to make a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) execute the methods described in the various embodiments of the present disclosure.

The embodiments of the present disclosure are described above with reference to the accompanying drawings, but the present disclosure is not limited to the above-mentioned specific embodiments. The above-mentioned specific embodiments are only illustrative and not restrictive. Those of ordinary skill in the art are Under the enlightenment of the present disclosure, without departing from the purpose of the present disclosure and the scope of protection of the claims, many forms can be made, all of which fall within the protection of the present disclosure.

Claims

A method for determining the mapping relationship between the transmission configuration indication TCI state and the demodulation reference signal DMRS, applied to a terminal, includes:

Receive downlink control information or high-level parameter configuration information;

According to the received downlink control information or high-level parameter configuration information, determine the correspondence between N TCI states and M DMRS code division multiplexing CDM groups or Y DMRS ports, where N, M, and Y are all greater than or equal to 1. Positive integer.
The method according to claim 1, wherein the downlink control information comprises:

The mapping relationship between TCI status and DMRS CDM group;

Among them, the group number of the DMRS CDM group corresponding to the first TCI state is smaller than the group number of the DMRS CDM group corresponding to the second TCI state;

Alternatively, the group number of the DMRS CDM group corresponding to the first TCI state is greater than the group number of the DMRS CDM group corresponding to the second TCI state.
The method according to claim 1, wherein the downlink control information comprises:

The mapping relationship between TCI status and DMRS port;

Wherein, the CDM group number of the DMRS port corresponding to the first TCI state is smaller than the CDM group number of the DMRS port corresponding to the second TCI state;

Alternatively, the CDM group number of the DMRS port corresponding to the first TCI state is greater than the CDM group number of the DMRS port corresponding to the second TCI state.
The method according to claim 1, wherein the corresponding relationship between the N TCI states and M DMRS CDM groups or Y DMRS ports is located in a DMRS port indication table.
The method according to claim 1, wherein the high-level parameter configuration information includes:

Configure X TCI state groups, each TCI state group is associated with a specified parameter, where X is a positive integer greater than or equal to 1.
The method according to claim 5, wherein the designated parameter is associated with the DMRS CDM group or DMRS port.
The method according to claim 5, wherein each TCI state group includes at least one TCI state.
A method for configuring the mapping relationship between TCI status and DMRS, applied to the network side, includes:

Send downlink control information or high-level parameter configuration information, where the downlink control information or high-level parameter configuration information is used by the terminal to determine the correspondence between N TCI states and M DMRS CDM groups or Y DMRS ports, where N, M, and Y All are positive integers greater than or equal to 1, where N, M, and Y are all positive integers greater than or equal to 1.
The method according to claim 8, wherein the downlink control information comprises:

The mapping relationship between TCI status and DMRS CDM group;

Among them, the group number of the DMRS CDM group corresponding to the first TCI state is smaller than the group number of the DMRS CDM group corresponding to the second TCI state;

Alternatively, the group number of the DMRS CDM group corresponding to the first TCI state is greater than the group number of the DMRS CDM group corresponding to the second TCI state.
The method according to claim 9, wherein the downlink control information comprises:

The mapping relationship between TCI status and DMRS port;

Wherein, the CDM group number of the DMRS port corresponding to the first TCI state is smaller than the CDM group number of the DMRS port corresponding to the second TCI state;

Alternatively, the CDM group number of the DMRS port corresponding to the first TCI state is greater than the CDM group number of the DMRS port corresponding to the second TCI state.
The method according to claim 8, wherein the high-level parameter configuration information comprises:

Configure X TCI state groups, each TCI state group is associated with a specified parameter, where X is a positive integer greater than or equal to 1.
A terminal, including: a transceiver and a processor;

The transceiver is used to receive downlink control information or high-level parameter configuration information;

The processor is configured to determine the correspondence between N TCI states and M DMRS CDM groups or Y DMRS ports, where N, M, and Y are all positive integers greater than or equal to 1.
A terminal including:

The transceiver module is used to receive downlink control information or high-level parameter configuration information;

The processing module is used to determine the correspondence between N TCI states and M DMRS CDM groups or Y DMRS ports, where N, M, and Y are all positive integers greater than or equal to 1.
A network side device, including: a transceiver and a processor;

The transceiver is used to send downlink control information or high-level parameter configuration information, where the downlink control information or high-level parameter configuration information is used by the terminal to determine the correspondence between N TCI states and M DMRS CDM groups or Y DMRS ports, Among them, N, M and Y are all positive integers greater than or equal to 1.
A network side device, including:

The transceiver module is used to send downlink control information or high-level parameter configuration information. The downlink control information or high-level parameter configuration information is used by the terminal to determine the correspondence between N TCI states and M DMRS CDM groups or Y DMRS ports, where: N, M, and Y are all positive integers greater than or equal to 1.
A terminal comprising: a processor, a memory, and a processing program that is stored on the memory and can run on the processor to determine a method for determining a TCI state and a mapping relationship; Steps of the method for determining the mapping relationship between the TCI state and the DMRS described in any one of 7.
A network side device includes: a processor, a memory, and a processing program for the configuration method of the mapping relationship between the TCI state and the DMRS stored on the memory and running on the processor, when the processor is executed The steps of the method for configuring the mapping relationship between the TCI state and the DMRS according to any one of claims 8 to 11 are implemented.
A computer-readable storage medium, wherein a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the TCI state and DMRS according to any one of claims 1 to 7 are realized. The steps of the method for determining the mapping relationship, or the steps of the method for configuring the mapping relationship between the TCI state and the DMRS according to any one of claims 8 to 11 are implemented when the computer program is executed by a processor.