CN113271188A

CN113271188A - Data transmission method, terminal and base station

Info

Publication number: CN113271188A
Application number: CN202010093836.6A
Authority: CN
Inventors: 高雪媛; 苏昕; 高秋彬; 黄秋萍; 李辉
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2020-02-14
Filing date: 2020-02-14
Publication date: 2021-08-17
Anticipated expiration: 2040-02-14
Also published as: CN113271188B

Abstract

The invention discloses a data transmission method, a terminal and a base station, which are used for supporting the uplink control and data transmission of a multi-antenna panel to improve the reliability of an ultra-high-reliability ultra-low-delay communication URLLC service. The method comprises the following steps: determining that the terminal supports joint transmission of a plurality of antenna panels, and configuring a plurality of Sounding Reference Signal (SRS) resources corresponding to different panels for the terminal; performing channel measurement on a plurality of SRS resources sent by a terminal according to configuration to obtain channel measurement information, and determining an SRS resource combination suitable for scheduling a plurality of panel joint transmissions according to the channel measurement information; sending the joint transmission information to the terminal; and the joint transmission information is used for indicating that when the terminal adopts a plurality of panels to jointly transmit data, the SRS resource combination and the precoding information respectively corresponding to the SRS resource combination are applied to carry out data transmission.

Description

Data transmission method, terminal and base station

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a data transmission method, a terminal, and a base station.

Background

In the URLLC (Ultra Reliable Low Latency Communications) service of 5G (fifth generation mobile communication system), in the study of R17 version, in the current Uplink data Channel transmission mechanism based on codebook transmission, a base station can only indicate an Uplink PUSCH (Physical Uplink Shared Channel) corresponding to a terminal for the terminal to transmit a corresponding QCL (Quasi Co-Location, Quasi-Co-Location) direction, and can correspondingly determine a set of scheduling parameters for Uplink data transmission. That is, in the prior art, simultaneous transmission of data of multiple antenna panels of a terminal cannot be supported, which results in low reliability of URLLC service.

Disclosure of Invention

The invention discloses a data transmission method, a terminal and a base station, which are used for supporting the uplink control and data transmission of a multi-antenna panel to improve the reliability of an ultra-high-reliability ultra-low-delay communication URLLC service.

In a first aspect, an embodiment of the present invention provides a data transmission method, where the method includes:

determining that a terminal supports joint transmission of a plurality of antenna panels, and configuring a plurality of Sounding Reference Signal (SRS) resources corresponding to different panels for the terminal;

performing channel measurement on a plurality of SRS resources sent by the terminal according to the configuration to obtain channel measurement information, and determining an SRS resource combination suitable for scheduling the plurality of panel joint transmissions according to the channel measurement information;

sending joint transmission information to the terminal; when the joint transmission information is used for indicating the terminal to adopt a plurality of panel joint transmission data, the SRS resource combination and precoding information respectively corresponding to the SRS resource combination are applied to carry out data transmission; the joint transmission information includes a group of SRS resource indication SRIs corresponding to the SRS resource combination and precoding information corresponding to each SRS resource combination.

In a possible implementation manner, if it is determined that a terminal supports joint transmission of multiple antenna panels panel, configuring multiple sounding reference signal SRS resources corresponding to different panel for the terminal includes:

if the terminal supports joint transmission of a plurality of antenna panels, configuring an SRS resource set, wherein the SRS resource set comprises a plurality of SRS resource sets corresponding to the antenna panels; alternatively, the first and second electrodes may be,

and if the terminal supports the joint transmission of a plurality of antenna panels, configuring a plurality of SRS resource sets, wherein each SRS resource set comprises one or more SRS resources corresponding to the antenna panels.

In one possible implementation, sending the joint transmission information to the terminal includes:

and feeding back the SRI to the terminal and feeding back precoding indication information at the same time, wherein the precoding indication information comprises a precoding matrix indication (TPMI) and transmission layer number information (RI) contained in The Precoding Matrix Indication (TPMI).

In one possible embodiment, indicating a set of SRIs to the terminal includes:

and carrying indication information in the downlink control signaling sent to the terminal, wherein the indication information is used for indicating the information of each SRI in the group of SRIs.

In one possible implementation, the indicating SRI code point information to the terminal includes:

determining an SRI combination list and informing a terminal, wherein the SRI combination list comprises SRS resource information or spatial beam information, the SRS resource information comprises SRS resource information transmitted by a corresponding single antenna panel or information of a plurality of SRS resource combinations corresponding to joint transmission of a plurality of antenna panels, and the spatial beam information comprises spatial beam information transmitted by a corresponding single antenna panel or a plurality of spatial beam combination information corresponding to joint transmission of a plurality of antenna panels;

and carrying the SRI code point information in the SRI combination list in the downlink control information DCI so as to indicate the information of the SRS resource or the information of the space beam used for the data scheduling to the terminal.

In one possible embodiment, determining the SRI combination list includes:

configuring all SRS combination pairing information suitable for joint transmission and informing a terminal, wherein the SRS combination pairing information comprises all SRS information or information of SRS resource combination resources corresponding to different panels or all spatial beam information or spatial beam combination information;

determining beam information, wherein the beam information comprises beam measurement information and beam adjustment information;

and according to the beam information, activating SRS combination pairing preferentially used for scheduling in all SRS combination pairing information through media access layer control unit (MAC-CE) signaling, and configuring an SRI combination list according to the SRS combination pairing preferentially used for scheduling.

In one possible embodiment, determining the SRI combination list includes:

configuring all SRS combination pairing information suitable for joint transmission, wherein the SRS combination pairing information comprises all SRS resource information or information of SRS resource combinations or all spatial beam information or information of spatial beam combinations corresponding to different panels;

and configuring an SRI combined list according to the SRS combined pairing information.

In one possible embodiment, the SRI combination list includes SRI code point information and SRS resource information, and/or information of SRI code point information and SRS resource combination.

In one possible embodiment, the SRI combination list includes SRI code point information and spatial beam information, and/or SRI code point information and spatial beam combination information.

In one possible implementation, feeding back precoding information to the terminal includes:

feeding back optimal TPMI corresponding to each SRI in a group of SRIs and RI contained in the optimal TPMI to the terminal through downlink control information DCI; alternatively, the first and second electrodes may be,

feeding back optimal TPMI corresponding to the information of the SRS resource corresponding to the SRI code point information and RI contained in the optimal TPMI to the terminal through downlink control information DCI; alternatively, the first and second electrodes may be,

and feeding back the optimal TPMI corresponding to the space beam information corresponding to the SRI code point information and the RI contained in the optimal TPMI to the terminal through downlink control information DCI.

In a second aspect, an embodiment of the present invention provides a data transmission method, where the method includes:

receiving joint transmission information, wherein the joint transmission information is used for indicating that when the terminal adopts a plurality of panel joint transmission data, the SRS resource combination and precoding information respectively corresponding to the SRS resource combination are applied to carry out data transmission; the joint transmission information comprises a group of SRS Resource Indication (SRI) corresponding to the SRS resource combination and precoding information respectively corresponding to the SRS resource combination;

and according to the joint data transmission mode and the joint transmission information adopted by the scheduling, applying the group of SRIs and the precoding information respectively corresponding to the SRIs to send data on the corresponding panel.

In one possible embodiment, before receiving the joint transmission information, the method comprises:

receiving a plurality of Sounding Reference Signal (SRS) resource configurations sent by a base station, wherein the SRS resources correspond to different antenna panels panel configurations for a terminal configured by the base station;

and sending SRS sending resources according to the plurality of sounding reference signal SRS resources.

In one possible implementation, the plurality of sounding reference signal SRS resources are one SRS resource set or a plurality of SRS resource sets, wherein each SRS resource set of the plurality of SRS resource sets includes one or more SRS resources of a corresponding antenna panel.

In a possible implementation manner, the joint transmission information is indicated by indicating information carried in a downlink control signaling sent by the base station to the terminal, where the indicating information is used to indicate information of each SRI in the set of SRIs.

In one possible embodiment of the method according to the invention,

the joint transmission information is indicated by SRI code point information in an SRI combination list carried in downlink control information DCI by the base station;

the SRI combination list includes information of SRS resources or information of spatial beams, where the information of SRS resources includes SRS resource information corresponding to transmission of a single antenna panel or information of multiple SRS resource combinations corresponding to joint transmission of multiple antenna panels, and the information of spatial beams includes spatial beam information corresponding to transmission of a single antenna panel or multiple spatial beam combination information corresponding to joint transmission of multiple antenna panels.

In one possible embodiment, the method further comprises:

receiving an SRI combination list sent by the base station, and if the SRI combination list comprises SRI code point information and information of a space beam, determining information of a corresponding SRS resource according to the information of the space beam;

and determining the group of SRIs according to the corresponding SRS resources so as to apply the group of SRIs and the corresponding precoding information to send data on the corresponding panel.

In a third aspect, a base station is provided, which includes:

the terminal comprises a configuration unit and a receiving unit, wherein the configuration unit is used for determining that the terminal supports joint transmission of a plurality of antenna panels and configuring a plurality of Sounding Reference Signal (SRS) resources corresponding to different panels for the terminal;

a determining unit, configured to perform channel measurement on multiple SRS resources sent by the terminal according to the configuration to obtain channel measurement information, and determine, according to the channel measurement information, an SRS resource combination suitable for scheduling the multiple panel joint transmission;

a sending unit, configured to send joint transmission information to the terminal; when the joint transmission information is used for indicating the terminal to adopt a plurality of panel joint transmission data, the SRS resource combination and precoding information respectively corresponding to the SRS resource combination are applied to carry out data transmission; the joint transmission information includes a group of SRS resource indication SRIs corresponding to the SRS resource combination and precoding information corresponding to each SRS resource combination.

In a possible implementation, the configuration unit is specifically configured to:

In a possible implementation manner, the sending unit is specifically configured to:

determining an SRI combination list, wherein the SRI combination list includes SRS resource information or spatial beam information, the SRS resource information includes SRS resource information corresponding to a single antenna panel transmission or information of a plurality of SRS resource combinations corresponding to a plurality of antenna panel joint transmissions, and the spatial beam information includes spatial beam information corresponding to a single antenna panel transmission or a plurality of spatial beam combination information corresponding to a plurality of antenna panel joint transmissions;

In a possible implementation, the base station further includes a processing unit, specifically configured to:

and according to the beam information, activating the SRI matched with the beam information through a media access control unit (MAC-CE) signaling, and configuring an SRI combination list according to the SRI matched with the SRI.

In a possible implementation, the processing unit is further configured to:

In a fourth aspect, a terminal is provided, which includes:

a receiving unit, configured to receive joint transmission information, where the joint transmission information is used to instruct the terminal to perform data transmission by using the SRS resource combination and precoding information respectively corresponding to the SRS resource combination when the terminal employs multiple panels to jointly transmit data; the joint transmission information comprises a group of SRS Resource Indication (SRI) corresponding to the SRS resource combination and precoding information respectively corresponding to the SRS resource combination;

and the sending unit is used for sending data on the corresponding panel by applying the group of SRIs and the precoding information respectively corresponding to the SRIs according to the joint transmission mode adopted by the scheduling and the joint transmission information.

In a possible implementation, the terminal further includes a processing unit configured to:

In one possible embodiment of the method according to the invention,

the plurality of Sounding Reference Signal (SRS) resources are one SRS resource set or a plurality of SRS resource sets, wherein each SRS resource set in the plurality of SRS resource sets comprises one or more SRS resources corresponding to an antenna panel.

In one possible embodiment of the method according to the invention,

the joint transmission information is indicated by indicating information carried in a downlink control signaling sent to the terminal by the base station, wherein the indicating information is used for indicating information of each SRI in the group of SRIs.

In one possible embodiment of the method according to the invention,

In a possible implementation manner, if an SRI combination list sent by a base station is received, if the SRI combination list includes SRI code point information and information of a spatial beam, the sending unit is configured to:

determining information of corresponding SRS resources according to the information of the space wave beam;

In a fifth aspect, there is provided a base station comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps comprised by the method according to the first aspect when executing the computer program.

In a sixth aspect, a terminal is provided, the terminal comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps comprised in the method according to the second aspect when executing the computer program.

In a seventh aspect, a computer storage medium is provided, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to the first aspect or the steps of the method according to the second aspect.

The embodiment of the invention at least comprises the following beneficial effects:

in the embodiment of the invention, a base station determines that a terminal supports joint transmission of a plurality of antenna panels, configures a plurality of Sounding Reference Signal (SRS) resources corresponding to different panels for the terminal, then performs channel measurement on the plurality of SRS resources sent by the terminal according to the configuration to obtain channel measurement information, and determines an SRS resource combination suitable for scheduling the joint transmission of the plurality of panels according to the channel measurement information. The base station sends the joint transmission information to the terminal; and the joint transmission information is used for indicating that when the terminal adopts a plurality of panels to jointly transmit data, the SRS resource combination and the precoding information respectively corresponding to the SRS resource combination are applied to carry out data transmission. That is, in the embodiment of the present invention, by applying the foregoing method, uplink control and data transmission of a multi-antenna panel can be supported, so that the reliability of the URLLC service of ultra-high reliable ultra-low delay communication can be improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention.

FIG. 1 is a schematic diagram of multi-antenna panel transmission according to an embodiment of the present invention;

fig. 2 is a schematic flow chart of a data transmission method according to an embodiment of the present invention;

fig. 3 is a schematic flow chart of a data transmission method according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a base station in an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a terminal in an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of 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 invention. The embodiments and features of the embodiments of the present invention may be arbitrarily combined with each other without conflict. Also, while a logical order is shown in the flow diagrams, in some cases, the steps shown or described may be performed in an order different than here.

In the URLLC service of 5G system, please refer to the schematic diagram of data transmission by multiple antenna panels panel as shown in fig. 1, for a terminal configured with multiple antenna panels panel, the orientations of multiple antenna panels panel are greatly different, so that the QCLs corresponding to PUSCH (Physical Uplink Shared Channel) transmission of multiple panels are different. When the terminal respectively transmits data from different antenna panels, the difference of each transmitting point in space can cause the difference of large-scale channel parameters of a receiving link at the base station end, and the large-scale parameters of the channel directly influence the adjustment and optimization of filter coefficients during channel estimation.

However, in the prior art, the current Downlink URLLC service is scheduled based on a single PDCCH (Physical Downlink Control Channel), and the transmission of an ideal loop (ideal backhaul) is considered, so the uplink situation discussed in the present invention is also based on the scheduling of a single PDCCH, i.e., a single DCI (Downlink Control Information), on the premise of the ideal backhaul. At present, in an uplink data channel transmission mechanism based on codebook transmission, a base station may only indicate, for a terminal, an uplink PUSCH corresponding to the terminal to transmit a corresponding QCL direction, and may correspondingly determine a set of scheduling parameters for uplink data transmission. That is, in the prior art, simultaneous transmission of data of multiple antenna panels of a terminal cannot be supported, which results in low reliability of URLLC service. That is, the URLLC service also needs to further support multiple panels for uplink transmission, so as to improve the reliability of the URLLC service.

In view of this, the present invention provides a data transmission method, by which a terminal can send the same or different data in different panels, and the enhanced PUSCH transmission is implemented by multiplexing of time domain/frequency domain/space domain, so as to improve the reliability of the URLLC service.

After the design idea of the embodiment of the present invention is introduced, some simple descriptions are provided below for application scenarios to which the technical solution in the embodiment of the present invention is applicable, and it should be noted that the application scenarios described below are only used for illustrating the embodiment of the present invention and are not limited. In specific implementation, the technical scheme provided by the embodiment of the invention can be flexibly applied according to actual needs.

In the embodiment of the present invention, the data transmission method provided in the embodiment of the present invention may be applied to a URLLC service with higher requirements on transmission reliability, delay, performance, and the like, such as VR (virtual Reality) entertainment industry, AR (Augmented Reality) entertainment industry, Augmented Reality industrial automation, traffic control requirements for remote driving, and power distribution control requirements, and the like.

Before describing the data transmission method provided by the embodiment of the present invention, in order to better understand the data transmission method provided by the embodiment of the present invention, a process of transmitting data by using a single antenna panel in the prior art is described below.

In a specific implementation process, in PUSCH-based transmission in a 5GNR system, a terminal needs to configure at most one SRS (Sounding Reference Signal) resource set for codebook-based uplink transmission, the SRS resource set configures one or more multiport SRS resources, and a base station end feeds back SRS resources

The SRI (SRS resource indicator) of a bit indicates which one of all configured SRSs is selected through the SRI, and similarly, the base station determines a precoding matrix TPMI and a transmission layer number (rank) RI actually used for transmission by the terminal and notifies the terminal through the base station based on measurement of uplink CSI (Channel State Information). The data in the next uplink transmission of the terminal needs to be precoded by using the PMI and RI appointed by the base station terminal, and the precoded data is precoded according to the SRAnd mapping the Spatial filter Spatial relationship Info corresponding to the SRS resource indicated by the I to the corresponding antenna port. Different spatial filters are used for transmission of different SRSs, so that the precoded data of the terminal needs to be filtered by the spatial filters used by the SRSs indicated by the SRIs.

Referring to fig. 2, a flow diagram of a data transmission method provided in an embodiment of the present invention includes the following specific processes:

step 201: determining that the terminal supports joint transmission of a plurality of antenna panels, and configuring a plurality of Sounding Reference Signal (SRS) resources corresponding to different panels for the terminal;

step 202: performing channel measurement on a plurality of SRS resources sent by a terminal according to configuration to obtain channel measurement information, and determining an SRS resource combination suitable for scheduling a plurality of panel joint transmissions according to the channel measurement information;

step 203: sending the joint transmission information to the terminal; when the joint transmission information is used for indicating the terminal to adopt a plurality of panel joint transmission data, the SRS resource combination and the precoding information respectively corresponding to the SRS resource combination are applied to carry out data transmission; the joint transmission information includes a group of SRS resource indication SRI corresponding to the SRS resource combination and precoding information corresponding to each SRS resource combination.

In the embodiment of the invention, when the terminal reports the UE capability supporting multi-panel joint transmission to the base station, that is, the base station determines that the terminal supports multi-antenna-panel joint transmission, the base station configures a plurality of SRS resources corresponding to different panels for the terminal.

In a specific implementation process, the base station may configure, through beam management information or other known beam information, multiple multi-port SRS resources corresponding to different panels, which function as a "codebook", for the terminal, where the resources may belong to the same or different sets of SRS resources, and each of the SRS resources corresponds to different beam Spatial relationship information (Spatial relationship Info).

In the embodiment of the present invention, the SRS resource may be configured in any of the following manners.

The first method is as follows: and if the terminal supports the joint transmission of a plurality of antenna panels, configuring an SRS resource set, wherein the SRS resource set comprises a plurality of SRS resource sets corresponding to the antenna panels.

The second method comprises the following steps: and if the terminal supports the joint transmission of a plurality of antenna panels, configuring a plurality of SRS resource sets, wherein each SRS resource set comprises one or more SRS resources corresponding to the antenna panels.

In the embodiment of the present invention, the base station may only configure an SRS resource set whose usage is a codebook, where the SRS resource set includes multiple SRS resources corresponding to multiple panels, and the SRS resource set includes multiple SRS resources in total. Multiple usages may also be configured as SRS resource sets of the codebook, where each SRS resource set includes one or more SRS resource configurations of a corresponding panel, and the embodiment of the present invention is not limited.

In the embodiment of the invention, after configuring the SRS resource for the terminal, the base station feeds the SRS resource back to the terminal, and then the terminal can transmit the SRS resource according to the SRS resource configuration, so that the base station can measure and receive a plurality of transmitted SRS resources, and further the base station can determine specific beam combinations in the SRS resource to be suitable for multi-panel joint transmission, and indicate a group of SRIs corresponding to the determined beam combinations to the terminal through signaling, and simultaneously the base station can also determine the most suitable group of precoding information corresponding to the transmission of different panels, and indicate the most suitable group of precoding information to the terminal through the signaling.

In the embodiment of the present invention, the base station may feed back the SRI to the terminal and simultaneously feed back the precoding indication information, where the precoding indication information includes the precoding matrix indication TPMI and the transmission layer number information RI included in the precoding matrix indication TPMI, that is, send the joint transmission information to the terminal.

In the embodiment of the present invention, regarding the SRI feedback manner, two manners, i.e., independently indicating the SRI and jointly feeding back the SRI, may be roughly adopted to indicate the SRI.

The method for independently indicating the SRIs may be that the downlink control signaling sent to the terminal carries indication information, and the indication information is used to indicate information of each SRI in the group of SRIs; the SRI may be fed back jointly by determining an SRI combination list, and then carrying SRI code point information in the SRI combination list in the downlink control information DCI, so as to indicate information of an SRS resource or information of a spatial beam used for the current data scheduling to the terminal.

To facilitate understanding of those skilled in the art, the following lists several possible ways to describe how the base station feeds back the SRI to the terminal, and it should be understood that the following examples are only illustrative and are not limiting to the embodiments of the present invention, and other determining ways may be adopted in the specific implementation process besides the ways listed below, which are not exhaustive herein.

The first embodiment is as follows:

in the embodiment of the present invention, after the base station performs channel measurement to obtain channel measurement information, an SRS resource combination suitable for scheduling joint transmission of multiple panels may be determined according to the channel measurement information, the SRS resource combination corresponds to a group of SRS resource indication SRIs, and the base station may carry information indicating each SRI in the group of SRIs in a downlink control signaling.

In a specific implementation process, if a set of SRIs is { SRI-1, SRI-2, …, SRI-m }, the downlink control signaling includes using

The bit indicates the number of the SRI-1,

bit indication SRI-2, …, and use

The bit indicates the indication information of SRS-m. Specifically, the indicated information is shown in table 1 below: here, row 1 of table 1 is used to indicate SRS resource indicator information, and the second row indicates used bit data information.

TABLE 1

In particular toCorresponding to configuration one in the foregoing, N in table 1_SRS＝N_SRS1＝N_SRS2Corresponding to configuration two in the above, N in Table 1_SRS1Not necessarily equal to N_SRS2. That is, corresponding to the different manners in which the base station configures SRS resources for the terminal, the number of SRIs in the SRI group may be the same or may be different, that is, one or more SRIs are fed back to the terminal.

Example two:

in the embodiment of the present invention, a base station may configure all SRS combination pairing information suitable for joint transmission and notify a terminal, where the SRS combination pairing information includes information of all SRS resources corresponding to different panels or information of all spatial beams, and then determine beam information, where the beam information includes beam measurement information and beam adjustment information, and further may activate, according to the beam information, SRS combination pairing preferentially used for scheduling in all SRS combination pairing information through MAC-CE signaling, and configure an SRI combination list according to the SRS combination pairing preferentially used for scheduling.

In a specific implementation procedure, the base station configures, by RRC, all possible SRS combination pair information suitable for supporting transmission, where one SRS combination pair information may include a set of SRS resource combinations that can be used for transmission, for example, { SRS-1, SRS-2, …, SRS-M } (where the SRS resource combination includes y SRS numbers, 1< ═ y < ═ M, where M is the number of supported joint transmissions), or may correspond to a set of transmit beam direction combinations { spatialrelalationsfo-1, …, spatialrelationsfo-M } (the number is 1-M, and M is the number of supported joint transmissions), and may support data transmission from a single panel to a plurality of panels, where the base station configuration includes M pair information in total, for example, M is 64.

Further, the base station may activate, by the MAC-CE, N pairs according to the current beam measurement and beam adjustment information, where the N pairs are corresponding to an SRI combination list, where the SRI combination list may use an SRS resource combination list or indicate by using Spatial relationship Info beam direction combination.

For example, if N is 8, the base station may activate 8 pairs of the 64 pairs by the MAC-CE according to the current beam measurement and beam adjustment information, so as to combine the 8 pairs into a corresponding SRI list.

In the embodiment of the present invention, after the SRI combination list is determined, the downlink control information DCI may carry the SRI code point information in the SRI combination list, so as to indicate, to the terminal, the information of the SRS resource or the information of the spatial beam used for the current data scheduling.

Example three:

in the embodiment of the present invention, the base station may configure all SRS combination pairing information suitable for joint transmission, where the SRS combination pairing information includes information of all SRS resources corresponding to different panels or information of all spatial beams, and then configure an SRI combination list according to the SRS combination pairing information.

In a specific implementation procedure, the base station may configure all possible SRS combination pairing information suitable for supporting transmission through RRC, where one SRS combination pairing information may include a set of SRS resource combinations available for transmission, for example, { SRS-1, SRS-2, …, SRS-M } (where the SRS resource combination includes y SRS numbers, 1< ═ y < ═ M, where M is the number of supported joint transmissions), and may also include beam direction combinations { spatialrelalationsfo-1, …, spatialrelalationsfo-M } (the number is 1-M, and M is the number of supported joint transmissions), that is, data transmission from a single panel to multiple panel joint is supported, and the base station configuration includes M pairing information in total. The base station then configures an SRI combination list according to the M pairs.

And then the base station obtains the SRS resource combination suitable for transmission by measuring the SRS resource set used for the codebook CSI, and indicates the specific SRI code point information and the SRS resource combination or the space beam information specifically used by the transmission through the DCI.

In this embodiment of the present invention, the SRI combination lists in the second and third embodiments may be configured as SRS resource combinations or directly configured as beam direction combinations.

Specifically, the SRI combination list may be directly configured by the base station as the SRS resource combination, that is, the aforementioned SRI combination list includes SRI code point information and SRS resource information, and/or information of the SRI code point information and SRS resource combination.

Referring to table 2, table 2 shows an example of an SRI list, where a first column is used to indicate SRI code point index information, and a second column is used to indicate description information of SRS resources, for example, a list with an SRI list length of 8 is configured, where corresponding to the configuration with a serial number of 6, the SRI combinations of the SRI combinations suitable for multi-panel joint transmission are shown as (SRS1, SRS2), that is, SRS1 and SRS2 are SRS resources indicated by this multi-panel joint transmission.

In a specific implementation process, if a result obtained by measurement shows that a base station cannot meet a reception quality requirement for all SRSs transmitted by a certain panel, only the SRS resource on the corresponding panel meeting the reception condition is configured, so that a situation of only a single SRS may be included. For example, as shown in the configuration of SRI code point index information of 0 and 1 in table 2.

SRI codepoint index	description
		0	SRS1
1	SRS3
		…	…
6	SRS1，SRS2
		7	SRS3，SRS5，SRS8

TABLE 2

Optionally, the SRI combination list may be directly configured by the base station as spatialrelalationinfo beam direction combination, that is, the SRI combination list includes SRI code point information and spatial beam information, and/or SRI code point information and spatial beam combination information.

Referring to table 3, table 3 shows an example of a SpatialRelationInfo combination list, where the first column is used to indicate SRI code point index information, and the second column is used to indicate description information of SpatialRelationInfo, such as a SpatialRelationInfo combination list with an SRI combination length of 8, where the SRI corresponding to the SRI is 6, and the displayed SRI combinations are (SpatialRelationInfo 1, spatialrelationsinfo 2).

TABLE 3

In the embodiment of the present invention, the optimal TPMI corresponding to each SRI in a group of SRIs and the RI included in the optimal TPMI may be fed back to the terminal through the downlink control information DCI. That is, in a specific implementation process, for each SRS in the SRI indication, the base station calculates the optimal precoding information (TPMI and RI) corresponding thereto, and indicates the terminal through the downlink control signaling.

In a specific implementation process, an optimal TPMI corresponding to the information of the SRS resource corresponding to the SRI code point information and an RI included in the optimal TPMI may be fed back to the terminal through the downlink control information DCI. And feeding back the optimal TPMI corresponding to the information of the space beam corresponding to the SRI code point information and the RI contained in the optimal TPMI to the terminal through downlink control information DCI.

After the data transmission method at the base station side is introduced, please refer to fig. 3, which is a flowchart illustrating a data transmission method provided in an embodiment of the present invention.

Step 301: receiving joint transmission information, wherein the joint transmission information is used for indicating that when a terminal adopts a plurality of panel joint transmission data, the SRS resource combination and precoding information respectively corresponding to the SRS resource combination are applied to carry out data transmission; the joint transmission information comprises a group of SRS resource indication SRI corresponding to the SRS resource combination and precoding information respectively corresponding to the SRS resource indication SRI;

step 302: and according to the joint data transmission mode and the joint transmission information adopted by the scheduling, applying a group of SRIs and the precoding information respectively corresponding to the SRIs to send data on the corresponding panel.

In the implementation process of the present invention, after receiving a group of SRI indications and corresponding precoding information, which can be used for joint transmission, the terminal needs to consider a joint transmission mode, such as time domain/frequency domain/space domain, etc., adopted by the scheduling at the same time, so as to determine which SRS and corresponding precoding information are used for transmission on which panel, respectively.

For example, when the SRS resource combination actually corresponding to the fed back SRI is SRS1+ SRS2 and the PUSCH employs the joint transmission scheme as TDM, in the transmission time corresponding to SRS1, the terminal employs the spacial relationship info1 and TPMI1& RI1 corresponding to SRS1 to transmit data on the corresponding panel, and in the transmission time corresponding to SRS2, the terminal employs the SRS2 corresponding to the spacial relationship info2 and TPMI2& RI2 to transmit data on the corresponding panel.

In a specific implementation process, a terminal may receive multiple SRS resources of sounding reference signals sent by a base station and an SRI combination list sent by the base station, where it is to be noted that, if the received SRI combination list includes information of SRI code points and spatial beams, that is, information indicating spatial beams is received by the SRI code points, the terminal needs to correspond to a group of SRS resources in which spatial beam directions are indication information in an SRS resource set, and determine a corresponding precoding matrix and transmission layer number information according to the group of SRS resources, and then send data on a corresponding panel. In addition, since the method at the terminal side and the method at the base station side are corresponding, the description of this part is not expanded, and specific contents can be understood by referring to the corresponding description of the method at the base station side.

Referring to fig. 4, which is a schematic diagram of a base station according to an embodiment of the present invention, the base station includes a configuration unit 401, a determination unit 402, and a sending unit 403. Wherein:

a configuration unit 401, configured to determine that a terminal supports joint transmission of multiple antenna panels, and configure multiple sounding reference signal SRS resources corresponding to different panels for the terminal;

a determining unit 402, configured to perform channel measurement on multiple SRS resources sent by the terminal according to the configuration to obtain channel measurement information, and determine, according to the channel measurement information, an SRS resource combination suitable for scheduling the multiple panel joint transmission;

a sending unit 403, configured to send joint transmission information to the terminal; when the joint transmission information is used for indicating the terminal to adopt a plurality of panel joint transmission data, the SRS resource combination and precoding information respectively corresponding to the SRS resource combination are applied to carry out data transmission; the joint transmission information includes a group of SRS resource indication SRIs corresponding to the SRS resource combination and precoding information corresponding to each SRS resource combination.

In a possible implementation manner, the configuration unit 401 is specifically configured to:

In a possible implementation manner, the sending unit 403 is specifically configured to:

In a possible implementation, the processing unit is specifically configured to:

Referring to fig. 5, a schematic diagram of a terminal in an embodiment of the present invention includes a receiving unit 501 and a sending unit 502. Wherein:

a receiving unit 501, configured to receive joint transmission information, where the joint transmission information is used to instruct the terminal to perform data transmission by using the SRS resource combination and precoding information respectively corresponding to the SRS resource combination when the terminal employs multiple panels to jointly transmit data; the joint transmission information comprises a group of SRS Resource Indication (SRI) corresponding to the SRS resource combination and precoding information respectively corresponding to the SRS resource combination;

a sending unit 502, configured to apply the group of SRIs and the precoding information corresponding to the SRIs to send data on the corresponding panel according to the joint data transmission mode and the joint transmission information adopted in the current scheduling.

In a possible implementation manner, the joint transmission information is indicated by the downlink control information DCI carrying SRI code point information in an SRI combination list by the base station;

In a possible implementation manner, if an SRI combination list sent by a base station is received, if the SRI combination list includes SRI code point information and information of a spatial beam, the sending unit 502 is configured to:

It should be noted that the division of the unit in the embodiment of the present invention is schematic, and is only a logic function division, and there may be another division manner in actual implementation. In addition, functional units in the embodiments of the present invention 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 in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes several 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 invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

An embodiment of the present invention further provides a base station, where the base station includes a memory, a processor, and a computer program that is stored in the memory and can be run on the processor, and when the processor executes the computer program, the method includes steps as any one of data transmission methods corresponding to the base station side is implemented.

The embodiment of the invention also provides a terminal, which comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein when the processor executes the computer program, the steps included in any one of the data transmission methods corresponding to the terminal side are realized.

Embodiments of the present invention further provide a computer storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the data transmission method as described above. The computer storage media may be any available media or data storage device that can be accessed by a computer, 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 memory (NAND FLASH), Solid State Disks (SSDs)), etc.

The above method process flow may be implemented by a software program, which may be stored in a storage medium, and when the stored software program is called, the above method steps are performed.

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

Accordingly, the present invention may also be embodied in hardware and/or in software (including firmware, resident software, micro-code, etc.). Furthermore, the invention can take the form of a computer program product on a computer-usable or computer-readable storage medium having computer-usable or computer-readable program code embodied in the medium for use by or in connection with an instruction execution system. In the context of this document, a computer-usable or computer-readable medium may be any medium that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.

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

Claims

1. A method of data transmission, the method comprising:

2. The method of claim 1, wherein determining that a terminal supports joint transmission of multiple antenna panels, configuring Sounding Reference Signal (SRS) resources for the terminal corresponding to different panels comprises:

3. The method of claim 1, wherein sending the joint transmission information to the terminal comprises:

4. The method of claim 3, wherein indicating a set of SRIs to the terminal comprises:

5. The method of claim 3, wherein indicating SRI code point information to the terminal comprises:

determining an SRI combination list and notifying a terminal, wherein the SRI combination list includes SRS resource information or spatial beam information, and the SRS resource information includes SRS resource information transmitted by a single antenna panel or information of multiple SRS resource combinations corresponding to multiple antenna panel joint transmissions, or the spatial beam information includes spatial beam information transmitted by a single antenna panel or multiple spatial beam combination information corresponding to multiple antenna panel joint transmissions;

6. The method of claim 5, wherein determining the SRI combination list comprises:

configuring all SRS combination pairing information suitable for joint transmission and informing a terminal, wherein the SRS combination pairing information comprises all SRS resource information or information of SRS resource combinations corresponding to different panels or information of all spatial beam information or spatial beam combinations;

7. The method of claim 5, wherein determining the SRI combination list comprises:

8. The method according to claim 6 or 7, wherein the SRI combination list comprises SRI code point information and SRS resource information, and/or information of SRI code point information and SRS resource combinations.

9. The method according to claim 6 or 7, wherein the SRI combination list comprises SRI code point information and spatial beam information, and/or SRI code point information and spatial beam combination information.

10. The method of claim 3, wherein feeding back precoding information to the terminal comprises:

11. A method of data transmission, the method comprising:

receiving joint transmission information, wherein the joint transmission information is used for indicating a terminal to adopt a plurality of panel joint transmission data, and applying the SRS resource combination and precoding information respectively corresponding to the SRS resource combination to carry out data transmission; the joint transmission information comprises a group of SRS Resource Indication (SRI) corresponding to the SRS resource combination and precoding information respectively corresponding to the SRS resource combination;

12. The method of claim 11, wherein prior to receiving the joint transmission information, the method comprises:

13. The method of claim 12, wherein a plurality of Sounding Reference Signal (SRS) resources are one set of SRS resources or a plurality of sets of SRS resources, wherein each set of SRS resources in the plurality of sets of SRS resources includes one or more SRS resources of a corresponding antenna panel.

14. The method of claim 11, wherein the joint transmission information is indicated by a base station carrying indication information in downlink control signaling sent to the terminal, wherein the indication information is used for indicating information of each SRI in the set of SRIs.

15. The method of claim 11, wherein the joint transmission information is indicated by the base station carrying SRI code point information in an SRI combination list in downlink control information DCI;

16. The method of claim 11, wherein the method further comprises:

receiving an SRI (sequence reference indicator) combination list sent by a base station, and if the SRI combination list comprises SRI code point information and information of a space beam, determining the information of a corresponding SRS (sounding reference signal) resource according to the information of the space beam;

17. A base station, characterized in that the base station comprises:

18. The base station of claim 17, wherein the configuration unit is specifically configured to:

19. The base station of claim 17, wherein the sending unit is specifically configured to:

20. The base station of claim 19, wherein the sending unit is specifically configured to:

21. The base station of claim 19, wherein the sending unit is specifically configured to:

22. The base station of claim 21, wherein the base station further comprises a processing unit, specifically configured to:

23. The base station of claim 21, wherein the processing unit is further configured to:

24. The base station according to claim 22 or 23, wherein the SRI combination list comprises SRI code point information and SRS resource information, and/or information of SRI code point information and SRS resource combinations.

25. The base station according to claim 22 or 23, wherein the SRI combination list comprises SRI code point information and spatial beam information, and/or SRI code point information and spatial beam combination information.

26. The base station of claim 19, wherein the sending unit is specifically configured to:

feeding back optimal TPMI corresponding to the system information of the SRS resource corresponding to the SRI code point information and RI contained in the optimal TPMI to the terminal through downlink control information DCI; alternatively, the first and second electrodes may be,

27. A terminal, characterized in that the terminal comprises:

and the sending unit is used for sending data on the corresponding panel by applying the group of SRIs and the precoding information respectively corresponding to the SRIs according to the joint data transmission mode and the joint transmission information adopted by the scheduling.

28. The terminal of claim 27, wherein the terminal further comprises a processing unit to:

29. The terminal of claim 28, wherein a plurality of Sounding Reference Signal (SRS) resources are one set of SRS resources or a plurality of sets of SRS resources, wherein each set of SRS resources in the plurality of sets of SRS resources includes one or more SRS resources of a corresponding antenna panel.

30. The terminal of claim 27, wherein the joint transmission information is sent by a base station carrying indication information in a downlink control signaling sent to the terminal, wherein the indication information is used for indicating information of each SRI in the set of SRIs.

31. The terminal of claim 27,

32. The terminal of claim 31, wherein the SRI combination list sent by the base station is received, and if the SRI combination list includes SRI code point information and information of spatial beams, the sending unit is configured to:

33. A base station, characterized in that the base station comprises a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps comprised by the method according to any one of claims 1-10 when executing the computer program.

34. A terminal, characterized in that the terminal comprises a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps comprised by the method according to any one of claims 11-16 when executing the computer program.

35. A computer storage medium having a computer program stored thereon, the program, when executed by a processor, implementing the steps of a method according to any one of claims 1 to 16.