CN115333692A

CN115333692A - DMRS port information determination method, device and storage medium

Info

Publication number: CN115333692A
Application number: CN202110507703.3A
Authority: CN
Inventors: 苏昕; 卢艺文; 黄秋萍; 高秋彬
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2021-05-10
Filing date: 2021-05-10
Publication date: 2022-11-11
Anticipated expiration: 2041-05-10
Also published as: CN115333692B

Abstract

The embodiment of the application provides a method, a device and a storage medium for determining DMRS port information, wherein the method comprises the following steps: determining first configuration information; the first configuration information is used for indicating the type of a DMRS port information indication table or a DMRS Code Division Multiplexing (CDM) group; determining DMRS port information based on the first configuration information. The method, the device and the storage medium for determining the DMRS port information provided by the embodiment of the application determine the DMRS port information based on the configuration information for indicating the type of the DMRS port information indication table or the DMRS CDM group, thereby reducing the cost of DCI indication.

Description

DMRS port information determination method, device and storage medium

Technical Field

The present application relates to the field of communications technologies, and in particular, to a method, an apparatus, and a storage medium for determining DMRS port information.

Background

According to the current protocol, a network side firstly indicates a Demodulation Reference Signal (DMRS) type and a DMRS maximum symbol number of a Physical Downlink Shared Channel (PDSCH) through Radio Resource Control (RRC) signaling. Then, the network side indicates DMRS port Information through Downlink Control Information (DCI) format (format) 1 _1and Information bit fields of 4,5,6bits in DCI format1_ 2.

For a System Frame Number (SFN) transmission scheme of a Multiple Transmission Receiving Point (MTRP) newly added in The R17 release of The third Generation Partnership project (The 3rd Generation Partnership project,3 gpp) standard, DMRS port restriction under The scheme is to be increased, and DMRS ports in a PDSCH under The transmission scheme are restricted to be within a Code Division Multiplexing (CDM) group.

All DMRS port indications of the transmission scheme only use a part of information in the current DCI indication table, which results in a serious waste of the overhead of the DCI information field.

Disclosure of Invention

The embodiment of the application provides a method, a device and a storage medium for determining DMRS port information, which are used for solving the technical problem that the cost of a DCI information domain is seriously wasted in the prior art.

In a first aspect, an embodiment of the present application provides a method for determining demodulation reference signal DMRS port information, including:

determining first configuration information; the first configuration information is used for indicating the type of a DMRS port information indication table or a DMRS Code Division Multiplexing (CDM) group;

determining DMRS port information based on the first configuration information.

Optionally, in a case that the first configuration information indicates a first-type DMRS port information indication table, the determining DMRS port information based on the first configuration information includes:

screening a first DMRS port information indication table from the first DMRS port information indication table according to the DMRS type and the DMRS maximum symbol number of the PDSCH;

determining DMRS port information according to the DMRS port information index value and the first DMRS port information indication table;

wherein the first type of DMRS port information indication table comprises one or more DMRS port information indication tables; and DMRS ports indicated in any one of the first type of DMRS port information indication tables are in the same DMRS CDM group.

Optionally, the determining DMRS port information based on the first configuration information further includes:

and determining the overhead of target DCI according to the DMRS type of the PDSCH and the maximum symbol number of the DMRS, wherein the target DCI is used for bearing the DMRS port information index value.

Optionally, in a case that the first configuration information indicates a first DMRS CDM group, the determining DMRS port information based on the first configuration information includes:

screening a second DMRS port information indication table from the second DMRS port information indication table according to the DMRS type of the PDSCH and the maximum symbol number of the DMRS;

determining a third DMRS port information indication table according to the first DMRS CDM group and the second DMRS port information indication table;

determining DMRS port information according to the DMRS port information index value and the third DMRS port information indication table;

wherein the DMRS ports indicated in any one of the second DMRS-like port information indication tables are within a plurality of DMRS CDM groups, and the entries in the third DMRS port information indication table are a subset of the entries in the second DMRS port information indication table; the DMRS ports indicated in the third DMRS port information indication table are all within the first DMRS CDM group.

Optionally, before the determining DMRS port information based on the first configuration information, the method further includes:

receiving a Radio Resource Control (RRC) message;

and analyzing the DMRS type and the DMRS maximum symbol number of the PDSCH from the RRC message.

receiving downlink control information DCI;

and resolving the DMRS port information index value from the DCI.

Optionally, after determining DMRS port information based on the first configuration information, the method further includes:

and carrying out PDSCH data demodulation according to the DMRS port information.

Optionally, the DMRS port information includes a DMRS port number and a CDM group number without data transmission.

In a second aspect, an embodiment of the present application provides a method for determining demodulation reference signal DMRS port information, including:

indicating the first configuration information to the terminal; the first configuration information is used for indicating the DMRS port information indication table type or a DMRS Code Division Multiplexing (CDM) group.

Optionally, the method further comprises:

transmitting a Radio Resource Control (RRC) message to a terminal; and the RRC message carries the DMRS type and the DMRS maximum symbol number of the PDSCH.

Optionally, the method further comprises:

sending downlink control information DCI to a terminal; and the DCI carries the DMRS port information index value.

In a third aspect, an embodiment of the present application provides a terminal, including a memory, a transceiver, and a processor;

a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor for reading the computer program in the memory and performing the following:

determining DMRS port information based on the first configuration information.

determining DMRS port information according to the DMRS port information index value and the first DMRS port information indicator table;

wherein the first type of DMRS port information indication table comprises one or more DMRS port information indication tables; and the DMRS ports indicated in any one of the first DMRS port information indication tables are in the same DMRS CDM group.

Optionally, before determining DMRS port information based on the first configuration information, the method further includes:

receiving a Radio Resource Control (RRC) message;

and resolving the DMRS type and the maximum DMRS symbol number of the PDSCH from the RRC message.

receiving downlink control information DCI;

and resolving the DMRS port information index value from the DCI.

In a fourth aspect, an embodiment of the present application provides a network-side device, including a memory, a transceiver, and a processor;

a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor for reading the computer program in the memory and performing the following operations:

indicating the first configuration information to the terminal; the first configuration information is used for indicating the type of a DMRS port information indication table or a DMRS Code Division Multiplexing (CDM) group.

Optionally, the method further comprises:

In a fifth aspect, an embodiment of the present application provides an apparatus for determining demodulation reference signal DMRS port information, including:

a first determining module, configured to determine first configuration information; the first configuration information is used for indicating the type of a DMRS port information indication table or a DMRS Code Division Multiplexing (CDM) group;

a second determining module for determining DMRS port information based on the first configuration information.

In a sixth aspect, an embodiment of the present application provides an apparatus for determining demodulation reference signal DMRS port information, including:

the first indication module is used for indicating the first configuration information to the terminal; the first configuration information is used for indicating the type of a DMRS port information indication table or a DMRS Code Division Multiplexing (CDM) group.

In a seventh aspect, an embodiment of the present application further provides a processor-readable storage medium, where the processor-readable storage medium stores a computer program, and the computer program is configured to cause the processor to execute the steps of the HARQ codebook transmitting method according to the first aspect or the HARQ codebook receiving method according to the second aspect.

The method, the device and the storage medium for determining the DMRS port information provided by the embodiment of the application determine the DMRS port information based on the configuration information for indicating the type of the DMRS port information indication table or the DMRS CDM group, thereby reducing the cost of DCI indication.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic flowchart of a method for determining DMRS port information according to an embodiment of the present application;

fig. 2 is a second flowchart of a DMRS port information determination method according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a terminal according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a network-side device according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of an apparatus for determining DMRS port information according to an embodiment of the present application;

fig. 6 is a second schematic structural diagram of an apparatus for determining DMRS port information according to an embodiment of the present application.

Detailed Description

In R17, a network side device configures a new SFN transmission scheme of MTRP to a terminal through a high-level signaling, where a data layer of a PDSCH/Physical Downlink Control Channel (PDCCH) and a Channel of a DMRS port of the PDSCH/PDCCH have a QCL relationship with respect to at least one Channel large-scale parameter, and one or more Quasi Co-Location (QCL) reference signals. Thus, the data layer of each PDSCH/PDCCH and the DMRS port of the PDSCH/PDCCH come from the transmission of multiple transmission points (TRP/panel). Meanwhile, rel-17 intends to increase the DMRS port restriction under the scheme, and restrict the DMRS ports in the PDSCH under the transmission scheme to be in one CDM group.

According to the current protocol, the network side equipment firstly indicates the DMRS type and the maximum DMRS symbol number of the PDSCH through RRC signaling. And then, the network side equipment indicates DMRS port information through an information bit field of 4,5,6bits in the DCI format1 _1and the DCI format1_2, wherein the DMRS port information comprises a DMRS port number, a CDM group number without PDSCH data, a preamble symbol number and the like. Specific DMRS port information may be determined by tables 1/2/3/4 and tables 1A/2A/3A/4A. Tables 1/2/3/4 and tables 1A/2A/3A/4A refer to the existing standard protocols and are not described herein again.

In R16, when at least one Transmission Configuration Indication (TCI) code point (codepoint) in the MAC-CE activation information contains two TCI states, adopting a table 1A/2A/3A/4A; otherwise, use Table 1/2/3/4.

Aiming at the newly added MTRP SFN transmission scheme in R17, the limitation of DMRS ports under the scheme is added, and the DMRS ports in the PDSCH under the transmission scheme are limited in a CDM group, wherein all the DMRS ports only use part of information in the current DCI indication table. This would result in a significant waste of DCI information field overhead.

Based on the technical problem, the embodiment of the application provides a method for determining the DMRS port information of the PDSCH according to the DCI, and the method can greatly reduce the cost of DCI indication while determining the DMRS port information in the MTRP SFN transmission scheme.

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Fig. 1 is a schematic flowchart of a method for determining DMRS port information according to an embodiment of the present application, and as shown in fig. 1, an implementation subject of the method for determining DMRS port information according to the embodiment of the present application may be a terminal, for example, a mobile phone. The method comprises the following steps:

step 101, determining first configuration information; the first configuration information is used for indicating the DMRS port information indication table type or a DMRS Code Division Multiplexing (CDM) group.

Specifically, in this embodiment of the present application, a terminal first determines first configuration information, where the first configuration information may be carried by a higher layer signaling, for example, an RRC message.

The DMRS port information indication table types comprise two types, and the first type DMRS port information indication table is a table newly added in the embodiment of the application. The second-type DMRS port information indication table is a table defined in an existing standard protocol.

The first type of DMRS port information indication table comprises one or more DMRS port information indication tables. And DMRS ports indicated in any one of the first type of DMRS port information indication tables are all in the same DMRS CDM group.

For example, DMRS ports indicated in a certain DMRS port information indication table are all within CDM group 0 (CDM 0 group), or are all within CDM group 1 (CDM 1 group), or are all within CDM group 2 (CDM 2 group).

The second type DMRS port information indication table is a table defined in an existing standard protocol and comprises a table 1/2/3/4 and a table 1A/2A/3A/4A.

The DMRS ports indicated in any one of the second DMRS port information indication tables are within a plurality of DMRS CDM groups.

Tables 1/2/3/4 and tables 1A/2A/3A/4A refer to the existing standard protocols and are not described herein again.

And 102, determining DMRS port information based on the first configuration information.

Specifically, in the embodiment of the present application, after the terminal determines the first configuration information, DMRS port information is determined based on the first configuration information.

For example, in a case where the first configuration information indicates the first-type DMRS port information indication table, the terminal may first screen the first DMRS port information indication table from the first-type DMRS port information indication table according to the DMRS type of the PDSCH and the DMRS maximum symbol number.

Different DMRS types and DMRS maximum symbol numbers correspond to different DMRS port information indication tables, and the first DMRS port information indication table can be determined according to the DMRS type and the DMRS maximum symbol number of the PDSCH.

Then, the terminal determines the DMRS port information according to the DMRS port information index value and the first DMRS port information indication table.

For another example, in the case where the first configuration information indicates the first DMRS CDM group, the terminal first selects the second DMRS port information indication table from the second DMRS port information indication table according to the DMRS type and DMRS maximum symbol number of the PDSCH.

And then, determining a third DMRS port information indication table according to the first DMRS CDM group and the second DMRS port information indication table.

And finally, determining the DMRS port information according to the DMRS port information index value and a third DMRS port information indication table.

The DMRS port information indication table stores a one-to-one correspondence relationship between DMRS port information index values and DMRS port information. And determining the DMRS port information according to the DMRS port information index value and the first DMRS port information indication table.

In an embodiment of the present application, the DMRS port information includes at least one of a DMRS port number, a CDM group number not including PDSCH data, and a preamble symbol number.

The method for determining the DMRS port information provided by the embodiment of the application determines the DMRS port information based on the configuration information for indicating the type of the DMRS port information indication table or the DMRS CDM group, thereby reducing the cost of DCI indication.

Specifically, the DMRS port information indication table types include two types, and the first type DMRS port information indication table is a table newly added in the embodiment of the present application. The second-type DMRS port information indication table is a table defined in an existing standard protocol.

The first type of DMRS port information indication table includes one or more DMRS port information indication tables. And DMRS ports indicated in any one of the first type of DMRS port information indication tables are all in the same DMRS CDM group.

For example, DMRS ports indicated in a certain DMRS port information indication table are all within a CDM0 group, or all within a CDM1 group, or all within a CDM2 group.

The DMRS ports indicated in any one of the second type of DMRS port information indication tables are within a plurality of DMRS CDM groups.

In this case, the terminal firstly screens out the first DMRS port information indication table from the first DMRS port information indication table according to the DMRS type of the PDSCH and the DMRS maximum symbol number.

And then, the terminal determines the DMRS port information according to the DMRS port information index value and the first DMRS port information indication table.

The first type of DMRS port information indication table comprises one or more DMRS port information indication tables. The DMRS ports indicated in any DMRS port information indication table in the first type DMRS port information indication table are all within the same DMRS CDM group, and thus,

according to the method for determining the DMRS port information, the terminal is indicated to use the newly-added DMRS port information indication table through the first configuration information, so that the terminal determines the DMRS port information, and the cost of DCI indication is reduced.

Optionally, the overhead of the target DCI is determined according to the DMRS type and the DMRS maximum symbol number of the PDSCH, where the target DCI is used to carry the DMRS port information index value.

Specifically, in this embodiment of the present application, determining DMRS port information based on the first configuration information further includes:

and determining the overhead of the target DCI according to the DMRS type of the PDSCH and the maximum symbol number of the DMRS, wherein the target DCI is used for bearing the DMRS port information index value.

determining a third DMRS port information indicator according to the first DMRS CDM group and the second DMRS port information indicator;

wherein the DMRS ports indicated in any one of the second type of DMRS port information indication tables are within a plurality of DMRS CDM groups, and entries in the third DMRS port information indication table are a subset of entries in the second DMRS port information indication table; the DMRS ports indicated in the third DMRS port information indication table are all within the first DMRS CDM group.

Specifically, in this embodiment, in the case that the first configuration information indicates the first DMRS CDM group, the terminal first screens out the second DMRS port information indicator from the second DMRS port information indicator according to the DMRS type and DMRS maximum symbol number of the PDSCH.

The entries in the third DMRS port information indication table are a subset of the entries in the second DMRS port information indication table. The DMRS ports indicated in the third DMRS port information indication table are all within the first DMRS CDM group.

And the DMRS port information indication table stores the one-to-one corresponding relation between the DMRS port information index value and the DMRS port information. And determining the DMRS port information according to the DMRS port information index value and the first DMRS port information indication table.

According to the method for determining the DMRS port information, the DMRS CDM group is indicated through the first configuration information, so that the terminal determines the DMRS port information, and the cost of DCI indication is reduced.

receiving a Radio Resource Control (RRC) message;

Specifically, in this embodiment of the application, before the terminal determines the DMRS port information based on the first configuration information, the network side device further needs to send an RRC message to the terminal. And the RRC message carries the DMRS type and the DMRS maximum symbol number of the PDSCH.

And the terminal receives the RRC message sent by the network side.

And the terminal analyzes the DMRS type and the DMRS maximum symbol number of the PDSCH from the RRC message.

The method for determining the DMRS port information, provided by the embodiment of the application, has the advantages that the DMRS type and the DMRS maximum symbol number of the PDSCH are borne through the RRC message, the compatibility of the system is improved, and the signaling overhead is reduced.

receiving downlink control information DCI;

and analyzing the DMRS port information index value from the DCI.

Specifically, in this embodiment, before the terminal determines the DMRS port information based on the first configuration information, the network side device further needs to send DCI to the terminal. The DMRS port information index value is carried in the DCI.

And the terminal receives the DCI sent by the network side.

And the terminal analyzes the DMRS port information index value from the DCI.

According to the DMRS port information determining method provided by the embodiment of the application, the DCI is used for bearing the DMRS port information index value, so that the compatibility of a system is improved, and the signaling overhead is reduced.

Specifically, in the embodiment of the present application, after the terminal determines the DMRS port information, the terminal performs channel estimation according to the DMRS port information and completes PDSCH data demodulation.

Specifically, in the present embodiment, the DMRS port information includes at least one of a DMRS port number, a CDM group number not including PDSCH data, and a preamble symbol number.

The method in the above embodiment is further described below by using several specific examples.

The first embodiment is as follows:

and the terminal side receives DMRS configuration information through RRC signaling, wherein the DMRS configuration information comprises a DMRS type and the maximum number of DMRS symbols. And defining a newly added DMRS port information indication table, wherein the DMRS ports indicated in each newly added DMRS port information indication table are all in a CDM group 0.

1. By defining newly added DMRS indication tables, where the DMRS ports indicated in each table are within CDM group 0, as shown in tables 1B-4B:

table 1b

Table 2b

Table 3b

Table 4b

2. And the terminal side selects a corresponding DMRS indication table according to different DMRS types and the maximum symbol length, and determines the DMRS port indication overhead (the bit number occupied by the DMRS port information index value in the DCI) in the DCI.

If the DMRS type is 1 and the maximum symbol number is 1, the DMRS indication table is a table 1B, and the DMRS indication overhead is 3bits.

If the DMRS type is 1 and the maximum symbol number is 2, the DMRS indication table is in a table 2B, and the DMRS indication overhead is 4bits.

And if the DMRS type is 2 and the maximum symbol number is 1, the DMRS indication table is shown as table 3B, and the DMRS indication overhead is 4bits.

And if the DMRS type is 2 and the maximum symbol number is 2, the DMRS indication table is shown as 4B, and the DMRS indication overhead is 5bits.

3. The terminal determines a specific DMRS port number in the table and the CDM group number with no data transmission through the DCI.

If the DMRS type is 1 and the maximum symbol number is 1, when the DMRS indication information in the DCI is 011, the terminal may determine, by combining table 1B, that the DMRS port number of the PDSCH is 0 and the CDM group number for current data-free transmission is 2.

4. And the terminal side performs channel estimation through the determined DMRS port information and completes PDSCH data demodulation.

Example two:

and the terminal side receives DMRS configuration information through RRC signaling, wherein the DMRS configuration information comprises the DMRS type and the maximum number of DMRS symbols. And defining new added DMRS indication tables, wherein DMRS ports indicated in each table are within CDM group 1.

1. By defining newly added DMRS indication tables, wherein DMRS ports indicated in each table are within CDM group 1, as shown in tables 1C-4C:

table 1c

Table 2c

Table 3c

Table 4c

2. And the terminal side selects a corresponding DMRS indication table according to different DMRS types and the maximum symbol length, and determines the DMRS port indication overhead in the DCI.

And if the DMRS type is 1 and the maximum symbol number is 1, the DMRS indication table is a table 1C, and the DMRS indication overhead is 3bits.

And if the DMRS type is 1 and the maximum symbol number is 2, the DMRS indication table is in a table 2C, and the DMRS indication overhead is 4bits.

And if the DMRS type is 2 and the maximum symbol number is 1, the DMRS indication table is shown as table 3C, and the DMRS indication overhead is 3bits.

And if the DMRS type is 2 and the maximum symbol number is 2, the DMRS indication table is shown as 4C, and the DMRS indication overhead is 4bits.

If the DMRS type is 1 and the maximum symbol number is 1, when the DMRS indication information in the DCI is 010, the terminal may determine, by combining with table 1C, that the DMRS port number of the PDSCH is 2/3 and the CDM group number of the current no-data transmission is 2.

Example three:

and the terminal side receives DMRS configuration information through RRC signaling, wherein the DMRS configuration information comprises DMRS types and the maximum number of DMRS symbols. And defining a new DMRS indication table, wherein the DMRS ports indicated in the DMRS type 1 table are all in CDM group 0, and the DMRS ports indicated in the DMRS type 2 table are all in CDM group 2.

1. By defining a new DMRS indication table, as shown in tables 1D-4D:

table 1d

Table 2d

Table 3d

Table 4d

If the DMRS type is 1 and the maximum symbol number is 1, the DMRS indication table is a table 1D, and the DMRS indication overhead is 3bits.

And if the DMRS type is 1 and the maximum symbol number is 2, the DMRS indication table is in a table 2D, and the DMRS indication overhead is 4bits.

And if the DMRS type is 2 and the maximum symbol number is 1, the DMRS indication table is 3D, and the DMRS indication overhead is 3bits.

If the DMRS type is 2 and the maximum symbol number is 2, the DMRS indication table is in a table 4D, and the DMRS indication overhead is 4bits.

If the DMRS type is 2 and the maximum symbol number is 1, when the DMRS indication information in the DCI is 010, the terminal may determine, by combining with table 3D, that the DMRS port number of the PDSCH is 4/5 and the CDM group number of the current no-data transmission is 3.

Example four:

and the terminal side receives DMRS configuration information through RRC signaling, wherein the DMRS configuration information comprises DMRS types and the maximum number of DMRS symbols. And defining a newly added DMRS indication table, wherein the DMRS ports indicated in the DMRS type 1 table are all in CDM group 1, and the DMRS ports indicated in the DMRS type 1 table are all in CDM group 2.

1. By defining newly added DMRS indication tables, where DMRS ports indicated in each table are within CDM group 0, as shown in tables 1E-4E:

table 1e

Table 2e

Table 3e

Table 4e

And if the DMRS type is 1 and the maximum symbol number is 1, the DMRS indication table is a table 1E, and the DMRS indication overhead is 3bits.

If the DMRS type is 1 and the maximum number of symbols is 2, the DMRS indication table is in a table 2E, and the DMRS indication overhead is 4bits.

And if the DMRS type is 2 and the maximum symbol number is 1, the DMRS indication table is shown as table 3E, and the DMRS indication overhead is 3bits.

And if the DMRS type is 2 and the maximum symbol number is 2, the DMRS indication table is shown as 4E, and the DMRS indication overhead is 4bits.

If the DMRS type is 2 and the maximum symbol number is 1, when the DMRS indication information in the DCI is 010, the terminal may determine, by combining with table 3E, that the DMRS port number of the PDSCH is 4/5 and the CDM group number of the current no-data transmission is 3.

Example five:

the terminal side receives DMRS configuration information through RRC signaling, wherein the DMRS configuration information comprises a DMRS type 1, a DMRS maximum symbol number 1 or 2 and a CDM group index value 0. The terminal side determines a new DMRS indication table from rows according to the CDM group index value.

1. First, the terminal side may determine that all ports of DMRS are from CDM group 0 according to a CDM group index value of 0.

And then the terminal determines a new DMRS port indication table by itself according to the table 1/2 and the CDM index value in the current protocol. Optionally, the new DMRS port indication table is a subset of a DMRS port indication table agreed in advance.

That is, all information bits contained in DMRS port 0/1/4/5 can be selected in table 1/2, and the new table 1a/2a is as follows:

table 1a

Table 2a

2. And the terminal side selects a new DMRS indication table according to different maximum symbol numbers and determines the DMRS port indication overhead in the DCI.

If the DMRS type is 1 and the maximum number of symbols is 1, the DMRS indication table is a table 1a, and the DMRS indication overhead is 3bits.

If the DMRS type is 1 and the maximum symbol number is 2, the DMRS indication table is in a table 2a, and the DMRS indication overhead is 4bits.

3. The terminal determines a specific DMRS port number in the table and the CDM group number without data transmission through DCI.

If the DMRS type is 1 and the maximum symbol number is 1, when the DMRS indication information in the DCI is 010, the terminal may determine, by combining with table 1a, that the DMRS port number of the PDSCH is 0,1 and the CDM group number for current data transmission is 1.

4) And the terminal side performs channel estimation through the determined DMRS port information and completes PDSCH data demodulation.

Example six:

and the terminal side sends DMRS configuration information through RRC signaling, wherein the DMRS configuration information comprises a DMRS type 1, the maximum number of DMRS symbols and a CDM group index value 1. And the terminal side determines a new DMRS indication table according to the CDM group index value from the row.

1. First, the terminal side may determine that all ports of DMRS are from CDM group 1 according to a CDM group index value of 1.

That is, all information bits contained in DMRS ports 2/3/6/7 can be selected from table 1/2, and the new table 1b/2b is as follows:

table 1b

Table 2b

If the DMRS type is 1 and the maximum number of symbols is 1, the DMRS indication table is shown as a table 1b, and the DMRS indication overhead is 3bits.

If the DMRS type is 1 and the maximum number of symbols is 2, the DMRS indication table is in a table 2b, and the DMRS indication overhead is 4bits.

If the DMRS type is 1 and the maximum symbol number is 1, when the DMRS indication information in the DCI is 010, the terminal may determine, by combining table 1b, that the DMRS port number of the PDSCH is 2/3 and the CDM group number for current data-free transmission is 2.

Example seven:

and the terminal side receives DMRS configuration information through RRC signaling, wherein the DMRS configuration information comprises DMRS type 2, DMRS maximum symbol number and CDM group index value 0. The terminal side determines a new DMRS indication table from rows according to the CDM group index value.

And then the terminal determines a new DMRS port indication table by itself according to the table 3/4 and the CDM index value in the current protocol. Optionally, the new DMRS port indication table is a subset of a DMRS port indication table agreed in advance.

That is, all information bits contained in DMRS port 0/1/6/7 can be selected in table 3/4, and the new table 3a/4a is as follows:

table 3a

Table 4a

2. And the terminal side selects a corresponding new DMRS indication table according to different maximum symbol numbers and determines the DMRS port indication overhead in the DCI.

If the DMRS type is 2 and the maximum number of symbols is 1, the DMRS indication table is shown as table 3a, and the DMRS indication overhead is 3bits.

If the DMRS type is 2 and the maximum number of symbols is 2, the DMRS indication table is shown as table 4a, and the DMRS indication overhead is 4bits.

If the DMRS type is 2 and the maximum symbol number is 1, when the DMRS indication information in the DCI is 010, the terminal may determine, by combining table 3a, that the DMRS port number of the PDSCH is 0/1 and the CDM group number for current data-free transmission is 1.

Example eight:

and the terminal side sends DMRS configuration information through RRC signaling, wherein the DMRS configuration information comprises a DMRS type 2, the maximum number of DMRS symbols and a CDM group index value 1. And the terminal side determines a new DMRS indication table according to the CDM group index value from the row.

That is, all information bits contained in DMRS port 2/3/8/9 can be selected from table 3/4, and the new table 3b/4b is as follows:

table 3b

Table 4b

2. And the terminal side selects a corresponding new DMRS indication table according to different DMRS types and the maximum symbol length, and determines the DMRS port indication overhead in the DCI.

If the DMRS type is 2 and the maximum number of symbols is 1, the DMRS indication table is shown in a table 3b, and the DMRS indication overhead is 3bits.

If the DMRS type is 2 and the maximum number of symbols is 2, the DMRS indication table is shown as table 4b, and the DMRS indication overhead is 4bits.

If the DMRS type is 2 and the maximum symbol number is 1, when the DMRS indication information in the DCI is 010, the terminal may determine, by combining with table 3b, that the DMRS port number of the PDSCH is 2/3 and the CDM group number of the current no-data transmission is 2.

Example nine:

and the terminal side receives DMRS configuration information through RRC signaling, wherein the DMRS configuration information comprises DMRS type 2, DMRS maximum symbol number and CDM group index value 2. The terminal side determines a new DMRS indication table from rows according to the CDM group index value.

1. First, the terminal side may determine that all ports of DMRS are from CDM group 2 according to a CDM group index value of 2.

And then the terminal determines a new DMRS port indication table according to the table 3/4 and the CDM index value 2 in the current protocol. Optionally, the new DMRS port indication table is a subset of a DMRS port indication table agreed in advance.

That is, all information bits contained in DMRS port 4/5/10/11 can be selected from table 3/4, and the new table 3c/4c is as follows:

table 3c

Table 4c

2. And the terminal side selects a corresponding new DMRS indication table according to different maximum symbol lengths and determines the DMRS port indication overhead in the DCI.

If the DMRS type is 2 and the maximum symbol number is 2, the DMRS indication table is shown as table 4c, and the DMRS indication overhead is 4bits.

If the DMRS type is 2 and the maximum symbol number is 1, when the DMRS indication information in the DCI is 010, the terminal may determine, by combining with the table 3c, that the DMRS port number of the PDSCH is 4/5 and the CDM group number of the current data-free transmission is 3.

The embodiment of the application provides a method for determining DMRS port information of a PDSCH according to DCI, and the method can greatly reduce DCI indication overhead while determining the DMRS port information in an MTRP SFN transmission scheme.

Fig. 2 is a second flowchart of the DMRS port information determination method according to the embodiment of the present application, and as shown in fig. 2, an implementation subject of the DMRS port information determination method according to the embodiment of the present application may be a network-side device, for example, a base station. The method comprises the following steps:

step 201, indicating first configuration information to a terminal; the first configuration information is used for indicating the type of a DMRS port information indication table or a DMRS Code Division Multiplexing (CDM) group.

Optionally, the method further comprises:

Specifically, the DMRS port information determining method provided in this embodiment may refer to the DMRS port information determining method embodiment in which the execution subject is a terminal, and may achieve the same technical effect, and details of the same parts and beneficial effects as those in the corresponding method embodiment in this embodiment are not described herein again.

Fig. 3 is a schematic structural diagram of a terminal according to an embodiment of the present application, where as shown in fig. 3, the terminal includes a memory 320, a transceiver 300, a processor 310:

a memory 320 for storing a computer program; a transceiver 300 for transceiving data under the control of the processor 310; a processor 310 for reading the computer program in the memory 320 and performing the following operations:

determining DMRS port information based on the first configuration information.

And in particular transceiver 300, for receiving and transmitting data under the control of processor 310.

Wherein in fig. 3, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 310, and various circuits, represented by memory 320, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. Transceiver 300 may be a plurality of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over transmission media including wireless channels, wired channels, fiber optic cables, and the like. For different user devices, the user interface 330 may also be an interface capable of interfacing with a desired device externally, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 310 is responsible for managing the bus architecture and general processing, and the memory 320 may store data used by the processor 310 in performing operations.

Alternatively, the processor 310 may be a CPU (central processing unit), an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array), or a CPLD (Complex Programmable Logic Device), and the processor may also adopt a multi-core architecture.

The processor is used for executing any one of the methods provided by the embodiment of the application according to the obtained executable instructions by calling the computer program stored in the memory. The processor and memory may also be physically separated.

receiving a Radio Resource Control (RRC) message;

receiving downlink control information DCI;

and resolving the DMRS port information index value from the DCI.

It should be noted that, the terminal provided in the embodiment of the present application can implement all the method steps implemented by the method embodiment in which the execution subject is the terminal, and can achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those of the method embodiment in this embodiment are not repeated here.

Fig. 4 is a schematic structural diagram of a network-side device according to an embodiment of the present application, and as shown in fig. 4, the network-side device includes a memory 420, a transceiver 400, and a processor 410:

a memory 420 for storing a computer program; a transceiver 400 for transceiving data under the control of the processor 410; a processor 410 for reading the computer program in the memory 420 and performing the following operations:

And in particular transceiver 400, for receiving and transmitting data under the control of processor 410.

Where in fig. 4, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 410 and various circuits of memory represented by memory 420 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 400 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium including wireless channels, wired channels, fiber optic cables, and the like. The processor 410 is responsible for managing the bus architecture and general processing, and the memory 420 may store data used by the processor 410 in performing operations.

The processor 410 may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), or a Complex Programmable Logic Device (CPLD), and may also have a multi-core architecture.

Optionally, the method further comprises:

Specifically, the HARQ codebook transmitting apparatus provided in the embodiment of the present application can implement all the method steps implemented by the method embodiment in which the execution subject is the terminal, and can achieve the same technical effect, and details of the same parts and beneficial effects as those of the method embodiment in this embodiment are not described herein again.

Fig. 5 is a schematic structural diagram of an apparatus for determining DMRS port information according to an embodiment of the present application, and as shown in fig. 5, the apparatus for determining DMRS port information according to the embodiment of the present application includes a first determining module 501 and a second determining module 502, where:

the first determining module 501 is configured to determine first configuration information; the first configuration information is used for indicating the type of a DMRS port information indication table or a DMRS Code Division Multiplexing (CDM) group; a second determining module 502 is configured to determine DMRS port information based on the first configuration information.

Optionally, in a case that the first configuration information indicates a first DMRS port information indication table, the determining DMRS port information based on the first configuration information includes:

wherein the DMRS ports indicated in any one of the second DMRS-like port information indication tables are within a plurality of DMRS CDM groups, and the entries in the third DMRS port information indication table are a subset of the entries in the second DMRS port information indication table; and the DMRS ports indicated in the third DMRS port information indication table are all in the first DMRS CDM group.

receiving a Radio Resource Control (RRC) message;

receiving downlink control information DCI;

and analyzing the DMRS port information index value from the DCI.

Specifically, the DMRS port information determining apparatus provided in this embodiment of the present application can implement all the method steps implemented by the method embodiment in which the execution subject is a terminal, and can achieve the same technical effect, and details of the same parts and beneficial effects as those of the method embodiment in this embodiment are not described herein again.

Fig. 6 is a second schematic structural diagram of an apparatus for determining DMRS port information according to an embodiment of the present application, and as shown in fig. 6, the apparatus for determining DMRS port information according to the embodiment of the present application includes a first indication module 601.

The first indication module 601 is configured to indicate first configuration information to a terminal; the first configuration information is used for indicating the type of a DMRS port information indication table or a DMRS Code Division Multiplexing (CDM) group.

Optionally, the method further comprises:

Specifically, the DMRS port information determining apparatus provided in this embodiment of the present application can implement all the method steps implemented by the method embodiment in which the execution subject is a network side device, and can achieve the same technical effect, and details of the same parts and beneficial effects as those of the method embodiment in this embodiment are not repeated herein.

It should be noted that, in the foregoing embodiments of the present application, the division of the units/modules is schematic, and is only a logic function division, and another division manner may be used in actual implementation. In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented as a software functional unit and sold or used as a stand-alone product, may be stored in a processor readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, an optical disk, or other various media capable of storing program codes.

Optionally, an embodiment of the present application further provides a processor-readable storage medium, where the processor-readable storage medium stores a computer program, where the computer program is configured to cause the processor to execute the method provided in each of the foregoing embodiments, and the method includes:

determining the total number of the receiving occasions of the candidate PDSCH based on the HARQ feedback time sets of the candidate services, and determining the codebook sequence corresponding to the receiving occasions of the candidate PDSCH in each time unit; determining the value of each bit in the HARQ codebook according to whether the receiving opportunity of each candidate PDSCH correctly receives downlink data; and transmitting the HARQ codebook.

Or comprises the following steps:

receiving an HARQ codebook sent by a terminal; the HARQ codebook is sent after the terminal determines the total number of the candidate PDSCH receiving opportunities based on the HARQ feedback time set of each candidate service in the multiple candidate services, determines the codebook sequence corresponding to the candidate PDSCH receiving opportunities in each time unit, and determines the value of each bit in the HARQ codebook according to whether the candidate PDSCH receiving opportunities correctly receive downlink data or not.

It should be noted that: the processor-readable storage medium may be any available medium or data storage device that can be accessed by a processor, including, but not limited to, magnetic memory (e.g., floppy disks, hard disks, magnetic tape, magneto-optical disks (MOs), etc.), optical memory (e.g., CDs, DVDs, BDs, HVDs, etc.), and semiconductor memory (e.g., ROMs, EPROMs, EEPROMs, non-volatile memories (NAND FLASH), solid State Disks (SSDs)), etc.

In addition, it should be noted that: in the embodiment of the present application, the term "and/or" describes an association relationship of associated objects, and indicates that three relationships may exist, for example, a and/or B, and may indicate: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

In the embodiments of the present application, the term "plurality" means two or more, and other terms are similar thereto.

The technical scheme provided by the embodiment of the application can be suitable for various systems, especially 5G systems. For example, the applicable system may be a global system for mobile communication (GSM) system, a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (WCDMA) General Packet Radio Service (GPRS) system, a long term evolution (long term evolution, LTE) system, an LTE Frequency Division Duplex (FDD) system, an LTE Time Division Duplex (TDD) system, an LTE-a (long term evolution) system, a universal mobile system (universal mobile telecommunications system, UMTS), a universal internet Access (WiMAX) system, a New Radio Network (NR) system, etc. These various systems include terminal devices and network devices. The System may further include a core network portion, such as an Evolved Packet System (EPS), a 5G System (5 GS), and the like.

The terminal device referred to in the embodiments of the present application may refer to a device providing voice and/or data connectivity to a user, a handheld device having a wireless connection function, or another processing device connected to a wireless modem. In different systems, the names of the terminal devices may be different, for example, in a 5G system, the terminal device may be called a User Equipment (UE). A wireless terminal device, which may be a mobile terminal device such as a mobile phone (or called a "cellular" phone) and a computer having a mobile terminal device, for example, a portable, pocket, hand-held, computer-included or vehicle-mounted mobile device, may communicate with one or more Core Networks (CNs) via a Radio Access Network (RAN), and may exchange languages and/or data with the RAN. Examples of such devices include Personal Communication Service (PCS) phones, cordless phones, session Initiation Protocol (SIP) phones, wireless Local Loop (WLL) stations, personal Digital Assistants (PDAs), and the like. The wireless terminal device may also be referred to as a system, a subscriber unit (subscriber unit), a subscriber station (subscriber station), a mobile station (mobile station), a remote station (remote station), an access point (access point), a remote terminal (remote terminal), an access terminal (access terminal), a user terminal (user terminal), a user agent (user agent), and a user device (user device), which is not limited in this embodiment.

The network device according to the embodiment of the present application may be a base station, and the base station may include a plurality of cells for providing services to a terminal. A base station may also be referred to as an access point, or a device in an access network that communicates over the air-interface, through one or more sectors, with wireless terminal devices, or by other names, depending on the particular application. The network device may be configured to exchange received air frames with Internet Protocol (IP) packets as a router between the wireless terminal device and the rest of the access network, which may include an Internet Protocol (IP) communication network. The network device may also coordinate attribute management for the air interface. For example, the network device according to the embodiment of the present application may be a Base Transceiver Station (BTS) in a Global System for Mobile communications (GSM) or a Code Division Multiple Access (CDMA), a network device (NodeB) in a Wideband Code Division Multiple Access (WCDMA), an evolved Node B (eNB) or an e-NodeB) in a Long Term Evolution (LTE) System, a 5G Base Station (gNB) in a 5G network architecture (next generation System), a Home evolved Node B (HeNB), a relay Node (relay Node), a Home Base Station (femto), a pico Base Station (pico), and the like, which are not limited in the embodiments of the present application. In some network architectures, a network device may include a Centralized Unit (CU) node and a Distributed Unit (DU) node, which may also be geographically separated.

Multiple Input Multiple Output (MIMO) transmission may be performed between the network device and the terminal device by using one or more antennas, where the MIMO transmission may be Single User MIMO (SU-MIMO) or Multi-User MIMO (MU-MIMO). According to the form and the number of the root antenna combination, the MIMO transmission can be 2D-MIMO, 3D-MIMO, FD-MIMO or massive-MIMO, and can also be diversity transmission, precoding transmission, beamforming transmission, etc.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer-executable instructions. These computer-executable instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These processor-executable instructions may also be stored in a processor-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the processor-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These processor-executable instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. A method for determining demodulation reference signal (DMRS) port information is characterized by comprising the following steps:

determining DMRS port information based on the first configuration information.

2. The method for determining DMRS port information according to claim 1, wherein in a case that the first configuration information indicates a first-type DMRS port information indication table, the determining DMRS port information based on the first configuration information comprises:

screening a first DMRS port information indication table from the first type DMRS port information indication table according to the DMRS type and the DMRS maximum symbol number of the PDSCH;

3. The method for determining DMRS port information as claimed in claim 2, wherein said determining DMRS port information based on said first configuration information further comprises:

4. The method of claim 1, wherein, in the case that the first configuration information indicates a first DMRS CDM group, the determining DMRS port information based on the first configuration information comprises:

5. The method for determining DMRS port information as claimed in claim 1, wherein said determining DMRS port information based on said first configuration information is preceded by:

receiving a Radio Resource Control (RRC) message;

6. The method of claim 1, wherein prior to determining DMRS port information based on the first configuration information, further comprising:

receiving downlink control information DCI;

and analyzing the DMRS port information index value from the DCI.

7. The method for determining DMRS port information as claimed in claim 1, wherein said determining DMRS port information based on said first configuration information further comprises:

8. The DMRS port information determination method of claim 1, wherein the DMRS port information includes a DMRS port number and a CDM group number without data transmission.

9. A method for determining demodulation reference signal (DMRS) port information is characterized by comprising the following steps:

10. The DMRS port information determination method as claimed in claim 9, further comprising:

11. The DMRS port information determination method as claimed in claim 9, further comprising:

12. A terminal comprising a memory, a transceiver, a processor;

a memory for storing a computer program; a transceiver for transceiving data under the control of the processor; a processor for reading the computer program in the memory and performing the following operations:

determining DMRS port information based on the first configuration information.

13. The terminal of claim 12, wherein, in a case that the first configuration information indicates a first type of DMRS port information indication table, the determining DMRS port information based on the first configuration information comprises:

14. The terminal of claim 13, wherein the determining DMRS port information based on the first configuration information further comprises:

15. The terminal of claim 12, wherein, in the case that the first configuration information indicates a first DMRS CDM group, the determining DMRS port information based on the first configuration information comprises:

16. The terminal of claim 12, wherein prior to the determining DMRS port information based on the first configuration information, further comprises:

receiving a Radio Resource Control (RRC) message;

17. The terminal of claim 12, wherein prior to the determining DMRS port information based on the first configuration information, further comprises:

receiving downlink control information DCI;

and analyzing the DMRS port information index value from the DCI.

18. The terminal of claim 12, wherein after determining DMRS port information based on the first configuration information, further comprises:

19. The terminal of claim 12, wherein the DMRS port information comprises a DMRS port number and a CDM group number with no data transmission.

20. A network-side device, comprising a memory, a transceiver, and a processor;

21. The network-side device of claim 20, further comprising:

22. The network-side device of claim 20, further comprising:

23. An apparatus for determining demodulation reference signal (DMRS) port information, comprising:

24. An apparatus for determining demodulation reference signal (DMRS) port information, comprising:

the first indication module is used for indicating the first configuration information to the terminal; the first configuration information is used for indicating the DMRS port information indication table type or a DMRS Code Division Multiplexing (CDM) group.

25. A processor-readable storage medium, characterized in that the processor-readable storage medium stores a computer program for causing the processor to perform the DMRS port information determination method of any one of claims 1 to 11.