CN110710268A

CN110710268A - Method for determining first multi-antenna transmission mode, terminal equipment and network equipment

Info

Publication number: CN110710268A
Application number: CN201880037576.1A
Authority: CN
Inventors: 唐海
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2018-03-16
Filing date: 2018-03-16
Publication date: 2020-01-17
Anticipated expiration: 2038-03-16
Also published as: CN110710268B; WO2019174054A1

Abstract

The embodiment of the application discloses a method for determining a first multi-antenna transmission mode, terminal equipment and network equipment, wherein the method is applied to a vehicle networking system and comprises the following steps: the method comprises the steps that first terminal equipment receives first information sent by second terminal equipment; and the first terminal equipment determines a first multi-antenna transmission mode adopted by a data channel transmitted by the second terminal equipment according to the first information. The method, the terminal device and the network device of the embodiment of the application are beneficial to improving the transmission performance of the system.

Description

Method for determining first multi-antenna transmission mode, terminal equipment and network equipment

Technical Field

The embodiments of the present application relate to the field of communications, and in particular, to a method, a terminal device, and a network device for determining a first multi-antenna transmission mode.

Background

A Vehicle networking or Vehicle-to-equipment (V2X) communication system is a Sidelink (SL) transmission technology based on Vehicle-to-Vehicle (Device-to-Device, D2D) communication, and unlike a conventional Long Term Evolution (LTE) system in which data is received or transmitted through a base station, the Vehicle networking system adopts a terminal-to-terminal direct communication mode, thereby having higher spectral efficiency and lower transmission delay.

In the LTE system, a plurality of transmission antennas are introduced at the network side, and thus, different multi-antenna transmission modes can be supported by a data channel. In the LTE system, multiple multi-antenna transmission modes are defined, such as single-antenna port transmission, transmission diversity, spatial multiplexing, and beamforming. In the car networking system, since the vehicle is large in size and has an inherent condition of installing and using multiple antennas, the data channel of the car networking system can also support multiple multi-antenna transmission modes. How the terminal device knows the multi-antenna transmission mode for data transmission and how the receiving end knows the multi-antenna transmission mode adopted by the transmitting end is the problem to be solved.

Disclosure of Invention

In view of this, embodiments of the present application provide a method, a terminal device, and a network device for determining a first multi-antenna transmission mode, which are beneficial to improving system transmission performance.

In a first aspect, a method for determining a first multi-antenna transmission mode is provided, and the method is applied to a vehicle networking system, and includes: the method comprises the steps that first terminal equipment receives first information sent by second terminal equipment; and the first terminal equipment determines a first multi-antenna transmission mode adopted by a data channel transmitted by the second terminal equipment according to the first information.

In one possible implementation, the first multi-antenna transmission mode is one of single-antenna port transmission, transmit diversity, spatial multiplexing, and beamforming.

In one possible implementation, the first information is sidelink control information SCI.

In a possible implementation manner, the determining, by the first terminal device, a first multi-antenna transmission mode adopted by a data channel transmitted by the second terminal device according to the first information includes: the first terminal device determines the first multi-antenna transmission mode according to the bits in the SCI.

In a possible implementation manner, the determining, by the first terminal device, a first multi-antenna transmission mode adopted by a data channel transmitted by the second terminal device according to the first information includes: the first terminal device determines the first multi-antenna transmission mode according to the mask sequence adopted by the SCI.

In a second aspect, a method for determining a first multi-antenna transmission mode is provided, and the method is applied to a vehicle networking system, and comprises the following steps: the second terminal device sends first information to the first terminal device, wherein the first information is used for the first terminal device to determine a first multi-antenna sending mode adopted by a data channel sent by the second terminal device.

In one possible implementation, the first multi-antenna transmission mode is one of a single-antenna port transmission mode, transmit diversity, spatial multiplexing, and beamforming.

In one possible implementation, bits in the SCI are used to indicate the first multi-antenna transmission mode.

In one possible implementation, the masking sequence employed by the SCI is used to indicate the first multi-antenna transmission mode.

Optionally, other characteristics of the SCI may also be used to implicitly indicate the first multi-antenna transmission mode, for example, the first multi-antenna transmission mode may be in the SCI format, or may be a time-frequency resource used by a PSCCH carrying the SCI.

Optionally, a first terminal device receives a PSCCH of a second terminal device, where the PSCCH indicates a transmission resource of a data channel PSCCH of the second terminal device, and the first terminal device determines, according to a resource pool where the data channel PSCCH of the second terminal device is located and a first corresponding relationship, a first multi-antenna transmission mode used by the data channel of the second terminal device. The first corresponding relationship may be a corresponding relationship between resource pool information and a multi-antenna transmission mode.

In a third aspect, a method for determining a first multi-antenna transmission mode is provided, and the method is applied to a vehicle networking system, and the method includes: the second terminal equipment receives first information sent by the network equipment; and the second terminal equipment determines a first multi-antenna transmission mode of a data channel transmitted to the first terminal equipment by the second terminal equipment according to the first information.

In a possible implementation manner, the first information is downlink control information DCI or radio resource control RRC signaling.

In a possible implementation manner, the determining, by the second terminal device, a first multi-antenna transmission mode of a data channel transmitted by the second terminal device to the first terminal device according to the first information includes: the second terminal equipment determines the first multi-antenna transmission mode according to the bit in the first information.

In a possible implementation manner, the determining, by the second terminal device, a first multi-antenna transmission mode of a data channel transmitted by the second terminal device to the first terminal device according to the first information includes: and the second terminal equipment determines the first multi-antenna transmission mode according to the mask sequence or the scrambling code sequence adopted by the DCI.

Optionally, the network device may also implicitly indicate the first multi-antenna transmission mode by using other characteristics of the DCI, for example, the first multi-antenna transmission mode may be a format of the DCI, or a time-frequency resource used by a Physical Downlink Control Channel (PDCCH) carrying the DCI.

Optionally, the second terminal device receives DCI sent by the network device, where the DCI indicates a transmission resource of a data channel psch of the second terminal device, and the second terminal device determines, according to a resource pool where the data channel psch is located and the second correspondence, a first multi-antenna transmission mode used by the data channel. The second correspondence may be a correspondence between resource pool information and a multi-antenna transmission mode.

In a possible implementation manner, the first information is used to indicate a mapping relationship between a state of a terminal device and a multi-antenna transmission mode, and the second terminal device determines, according to the first information, a first multi-antenna transmission mode adopted by a data channel transmitted by the second terminal device to the first terminal device, including: and the second terminal equipment determines the first multi-antenna transmission mode according to the mapping relation.

In a possible implementation manner, the mapping relationship is at least one of a correspondence relationship between a speed of the terminal device and the multi-antenna transmission mode, a correspondence relationship between the number of antennas of the terminal device and the multi-antenna transmission mode, a correspondence relationship between a synchronization source type of the terminal device and the multi-antenna transmission mode, a correspondence relationship between a service type of the terminal device and the multi-antenna transmission mode, and a correspondence relationship between a quality of service QoS requirement corresponding to the service of the terminal device and the transmission mode.

In a fourth aspect, a method for determining a first multi-antenna transmission mode is provided, and the method is applied to a vehicle networking system, and the method comprises the following steps: the network equipment sends first information to second terminal equipment, wherein the first information is used for the second terminal equipment to determine a first multi-antenna sending mode adopted by a data channel sent by the second terminal equipment to the first terminal equipment.

In one possible implementation, bits in the first information are used to indicate the first multi-antenna transmission mode.

In one possible implementation, the mask sequence or scrambling sequence employed by the DCI is used to indicate the first multi-antenna transmission mode.

In a possible implementation manner, the first information is used to indicate a mapping relationship between a state of the terminal device and a multi-antenna transmission mode.

In a possible implementation manner, the mapping relationship is at least one of a correspondence relationship between a speed of the terminal device and a transmission mode, a correspondence relationship between a number of antennas of the terminal device and the transmission mode, a correspondence relationship between a synchronization source type of the terminal device and the transmission mode, a correspondence relationship between a service type of the terminal device and the transmission mode, and a correspondence relationship between a quality of service QoS requirement corresponding to the service of the terminal device and the multi-antenna transmission mode.

In a fifth aspect, a terminal device is provided, configured to perform the method of the first aspect or any possible implementation manner of the first aspect. In particular, the terminal device comprises means for performing the method of the first aspect described above or any possible implementation manner of the first aspect.

A sixth aspect provides a terminal device configured to perform the method of the second aspect or any possible implementation manner of the second aspect. In particular, the terminal device comprises means for performing the method of the second aspect described above or any possible implementation manner of the second aspect.

In a seventh aspect, a terminal device is provided, configured to perform the method in the third aspect or any possible implementation manner of the third aspect. In particular, the terminal device comprises means for performing the method of the third aspect or any possible implementation manner of the third aspect.

In an eighth aspect, a network device is provided for performing the method of the fourth aspect or any possible implementation manner of the fourth aspect. In particular, the network device comprises means for performing the method of the fourth aspect described above or any possible implementation manner of the fourth aspect.

In a ninth aspect, a terminal device is provided, which includes: memory, processor, input interface and output interface. The memory, the processor, the input interface and the output interface are connected through a bus system. The memory is configured to store instructions and the processor is configured to execute the instructions stored by the memory for performing the method of the first aspect or any possible implementation manner of the first aspect.

In a tenth aspect, there is provided a terminal device, including: memory, processor, input interface and output interface. The memory, the processor, the input interface and the output interface are connected through a bus system. The memory is configured to store instructions and the processor is configured to execute the instructions stored by the memory for performing the method of the second aspect or any possible implementation manner of the second aspect.

In an eleventh aspect, there is provided a terminal device, including: memory, processor, input interface and output interface. The memory, the processor, the input interface and the output interface are connected through a bus system. The memory is configured to store instructions and the processor is configured to execute the instructions stored by the memory for performing the method of the third aspect or any possible implementation manner of the third aspect.

In a twelfth aspect, a network device is provided, which includes: memory, processor, input interface and output interface. The memory, the processor, the input interface and the output interface are connected through a bus system. The memory is configured to store instructions and the processor is configured to execute the instructions stored by the memory for performing the method of the fourth aspect or any possible implementation manner of the fourth aspect.

In a thirteenth aspect, there is provided a computer storage medium for storing computer software instructions for executing the method in the first aspect or any possible implementation manner of the first aspect, or the method in the second aspect or any possible implementation manner of the second aspect, or the method in the third aspect or any possible implementation manner of the third aspect, or the method in the fourth aspect or any possible implementation manner of the fourth aspect, wherein the computer software instructions comprise a program designed to execute the aspects.

A fourteenth aspect provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of the first aspect or any of the alternative implementations of the first aspect, or the method of the second aspect or any of the alternative implementations of the second aspect, or the method of the third aspect or any of the alternative implementations of the third aspect, or the method of any of the alternative implementations of the fourth aspect.

These and other aspects of the present application will be more readily apparent from the following description of the embodiments.

Drawings

Fig. 1 is a schematic diagram illustrating an application scenario according to an embodiment of the present application.

Fig. 2 is a schematic diagram illustrating another application scenario of the embodiment of the present application.

Fig. 3 shows a schematic block diagram of a method of determining a first multi-antenna transmission mode according to an embodiment of the application.

Fig. 4 shows a schematic block diagram of another method of determining a first multi-antenna transmission mode according to an embodiment of the application.

Fig. 5 is a schematic block diagram illustrating yet another method of determining a first multi-antenna transmission mode according to an embodiment of the application.

Fig. 6 shows a schematic block diagram of yet another method of determining a first multi-antenna transmission mode according to an embodiment of the application.

Fig. 7 shows a schematic block diagram of a terminal device according to an embodiment of the present application.

Fig. 8 shows another schematic block diagram of a terminal device according to an embodiment of the present application.

Fig. 9 shows a further schematic block diagram of a terminal device of an embodiment of the application.

Fig. 10 shows a schematic block diagram of a network device of an embodiment of the application.

Fig. 11 shows a further schematic block diagram of a terminal device of an embodiment of the application.

Fig. 12 shows a further schematic block diagram of a terminal device of an embodiment of the application.

Fig. 13 shows a further schematic block diagram of a terminal device of an embodiment of the application.

Fig. 14 shows another schematic block diagram of a network device of an embodiment of the application.

Detailed Description

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.

It should be understood that the technical solutions of the embodiments of the present application may be applied to various communication systems, for example: a Global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a General Packet Radio Service (GPRS), a long term evolution LTE System, a LTE Frequency Division Duplex (FDD) System, a LTE Time Division Duplex (TDD), a Universal Mobile telecommunications System (Universal Mobile telecommunications System, UMTS), a UMTS Worldwide Interoperability for Microwave Access (WiMAX) communication System, a New Radio (New Radio, NR), a future 5G System, and the like.

In particular, the technical solution of the embodiment of the present application may be applied to various communication systems based on a non-orthogonal Multiple Access technology, such as a Sparse Code Multiple Access (SCMA) system, a Low Density Signature (LDS) system, and the like, and certainly the SCMA system and the LDS system may also be called other names in the communication field; further, the technical solution of the embodiment of the present application may be applied to a Multi-Carrier transmission system using a non-Orthogonal multiple access technology, for example, an Orthogonal Frequency Division Multiplexing (OFDM) using a non-Orthogonal multiple access technology, a Filter Bank Multi-Carrier (FBMC), a General Frequency Division Multiplexing (GFDM), a Filtered Orthogonal Frequency Division Multiplexing (F-OFDM) system, and the like.

A terminal device in the embodiments of the present application may refer to a User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a User terminal, a wireless communication device, a User agent, or a User Equipment. The access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with Wireless communication function, a computing device or other processing device connected to a Wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G Network or a terminal device in a future evolved Public Land Mobile Network (PLMN), and the like, and the embodiments of the present application are not limited thereto.

The Network device in this embodiment may be a device for communicating with a terminal device, where the Network device may be a Base Transceiver Station (BTS) in GSM or CDMA, a Base Station (NodeB, NB) in a WCDMA system, an evolved node b (eNB or eNodeB) in an LTE system, a wireless controller in a Cloud Radio Access Network (CRAN) scenario, or a relay Station, an Access point, a vehicle-mounted device, a wearable device, a Network device in a future 5G Network, or a Network device in a future evolved PLMN Network, and the like, and the embodiment of the present application is not limited.

Fig. 1 and 2 are schematic diagrams of an application scenario of the embodiment of the present application. Fig. 1 exemplarily shows one network device and two terminal devices, and optionally, the wireless communication system may include a plurality of network devices and each network device may include other numbers of terminal devices within a coverage area, which is not limited in this embodiment of the present application. In addition, the wireless communication system may further include other Network entities such as a Mobility Management Entity (MME), a Serving Gateway (S-GW), a Packet Data Network Gateway (P-GW), and the like, but the embodiment of the present invention is not limited thereto.

Specifically, the terminal device 20 and the terminal device 30 may communicate in the D2D communication mode, and when the D2D communication is performed, the terminal device 20 and the terminal device 30 directly communicate via a D2D link, i.e., a Sidelink (SL). For example, as shown in fig. 1 or fig. 2, terminal device 20 and terminal device 30 communicate directly via a sidelink. In fig. 1, terminal device 20 and terminal device 30 communicate via a sidelink, the transmission resources of which are allocated by the network device; in fig. 2, terminal device 20 and terminal device 30 communicate via a sidelink, and their transmission resources are selected by the terminal device autonomously without the need for the network device to allocate transmission resources.

The D2D communication mode may be applied to Vehicle-to-Vehicle (V2V) communication or Vehicle-to-other device (V2X) communication. In V2X communication, X may refer to any device with wireless receiving and transmitting capability, such as but not limited to a slow moving wireless device, a fast moving vehicle-mounted device, or a network control node with wireless transmitting and receiving capability. It should be understood that the embodiment of the present application is mainly applied to the scenario of V2X communication, but may also be applied to any other D2D communication scenario, and the embodiment of the present application is not limited in this respect.

In the car networking system, there may be two types of terminal devices, namely, a terminal device with a listening capability such as a Vehicle User Equipment (VUE) or a Pedestrian hand-held terminal (PUE), and a terminal device without a listening capability such as a PUE. VUEs have higher processing capability and are generally powered by a storage battery in a vehicle, while PUE processing capability is lower, and reduction of power consumption is also a main factor to be considered by PUEs, so in the existing vehicle networking system, VUEs are considered to have complete receiving capability and listening capability; while PUEs are considered to have partial or no receiving and listening capabilities. If the PUE has partial interception capability, the resources can be selected by adopting an interception method similar to that of the VUE, and available resources can be selected on the intercepted resources; and if the PUE does not have the interception capability, the PUE randomly selects transmission resources in the resource pool.

In Release-14 of the 3GPP protocol, two transmission modes, i.e., transmission mode 3(mode 3) and transmission mode 4(mode 4), are defined. The transmission resource of the terminal equipment using the transmission mode 3 is allocated by the base station, and the terminal equipment transmits data on a sidelink according to the resource allocated by the base station; the base station may allocate resources for single transmission to the terminal device, or may allocate resources for semi-static transmission to the terminal device. If the terminal equipment using the transmission mode 4 has the interception capability, adopting an interception (sending) and reservation (reservation) mode to transmit data, and if the terminal equipment does not have the interception capability, randomly selecting transmission resources in the resource pool. The terminal equipment with the interception capability acquires an available resource set in a resource pool in an interception mode, and the terminal equipment randomly selects one resource from the set for data transmission. Because the service in the car networking system has a periodic characteristic, the terminal device usually adopts a semi-static transmission mode, that is, after the terminal device selects one transmission resource, the resource is continuously used in a plurality of transmission cycles, so that the probability of resource reselection and resource conflict is reduced. The terminal device can carry the information of the reserved secondary transmission resource in the control information transmitted this time, so that other terminal devices can judge whether the resource is reserved and used by the terminal device by detecting the control information of the terminal device, and the purpose of reducing resource conflict is achieved.

In this case, the embodiment of the present application provides a method for determining a first multi-antenna transmission mode, where the method is applied to an internet of vehicles system, so that a transmitting terminal can obtain a multi-antenna transmission mode for data transmission, and a receiving terminal can know the multi-antenna transmission mode for data transmission.

Currently, four multi-antenna transmission modes are mainly defined in LTE, which may include single-antenna transmission, transmit diversity, beamforming, and spatial multiplexing. The transmit diversity may include cyclic delay diversity, Space Time Block Code (STBC), Space Frequency Block Code (SFBC), and the like. Spatial multiplexing may include space division multiplexing based on precoding, etc., that is, four broad classes are defined in LTE, each broad class including a different transmission mode.

Fig. 3 shows a schematic block diagram of a method 100 of determining a first multi-antenna transmission mode according to an embodiment of the application. The method 100 may be executed by a terminal device serving as a receiving end in fig. 1 or fig. 2, where the method 100 includes some or all of the following:

s110, a first terminal device receives first information sent by a second terminal device;

s110, the first terminal device determines, according to the first information, a first multi-antenna transmission mode adopted by the data channel transmitted by the second terminal device.

Specifically, the first terminal device in the method 100 may be referred to as a receiving end, the second terminal device may be referred to as a transmitting end, and the receiving end receives the first information transmitted by the transmitting end and determines the first multi-antenna transmission mode adopted by the data channel transmitted by the transmitting end. The data Channel may be a Physical Sidelink Shared Channel (psch). After the receiving end determines the first multi-antenna transmission mode adopted by the psch transmitted by the transmitting end, the receiving end may receive data transmitted by the transmitting end according to the determined first multi-antenna transmission mode. It should be noted that the first multi-antenna transmission mode according to the embodiment of the present application does not refer to the currently determined multi-antenna transmission mode used by the data channel transmitted by the transmitting end, and may also refer to the second multi-antenna transmission mode. In other words, the multi-antenna transmission mode used by the data channels transmitted by the transmitting end at the same time can be only one.

Therefore, in the method for determining the first multi-antenna transmission mode according to the embodiment of the present application, the transmitting end indicates the first multi-antenna transmission mode adopted by the data channel transmitted by the receiving end, so that the receiving end can accurately receive the data transmitted by the transmitting end, and the performance of system transmission is improved.

Optionally, in this embodiment of the application, the first multi-antenna transmission mode determined by the receiving end may be any one of the four broad categories of multi-antenna transmission modes defined in LTE, or may be a multi-antenna transmission mode defined in other communication systems. The first multi-antenna transmission mode according to the embodiment of the present application should not be limited to the above four.

The transmitting end may indicate the first multi-antenna transmission mode to the receiving end through a Physical downlink Control Channel (PSCCH). For example, Sidelink Control Information (SCI) may be transmitted to the receiving end. That is, the first information is SCI.

The transmitting end may indicate the first multi-antenna transmission mode through the SCI display. Specifically, this may be indicated by bits in the SCI. For example, 2 bits in the SCI are used to indicate the first multi-antenna transmission mode. Single antenna port transmission may be indicated by 00, transmit diversity may be indicated by 01, spatial multiplexing may be indicated by 10, and beamforming may be indicated by 11. It is to be understood that this is by way of illustration only and not of limitation.

The transmitting end may also implicitly indicate the first multi-antenna transmission mode through the SCI. Specifically, the transmitting end may implicitly indicate the first multi-antenna transmission mode through a mask sequence after the SCI is masked. Assume that the information bits of the SCI are represented as: a is₀,a₁,a₂,a₃,……,a_A-1Cyclic Redundancy Check (CRC) Check bit p₀,p₁,p₂,p₃,……,p_L-1Where a denotes an information bit length and L denotes a check bit length. The CRC-added bit sequence is denoted b₀,b₁,b₂,b₃,……,b_B-1Wherein B is A + L,

b_k＝a_kwherein k is 0,1,2, … …, A-1

b_k＝p_k-AWherein k is a, a +1, a +2, … …, a + L-1.

C, masking the sequence after CRC, wherein the sequence after masking is c₀,c₁,c₂,c₃,……,c_B-1Wherein

c_k＝b_kWherein k is 0,1,2, … …, A-1

c_k＝(b_k+X_mask,k-A) mod 2 where k is a, a +1, a +2, … …, a +15.

The mask sequence may be applied<X_mask,0,X_mask,1,……,X_mask,15>Corresponding to a multi-antenna transmission mode. For example, can use<0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0>Indicating single antenna port transmission by<0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1>Indicating transmit diversity by<1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0>Indicating spatial multiplexing with<1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1>Beamforming is indicated, and it should be understood that the embodiments of the present application are not limited to a specific mask sequence, and other mask sequences may be used to distinguish different multi-antenna transmission modes.

It should be understood that other characteristics of the SCI may also be used to implicitly indicate the first multi-antenna transmission mode, for example, the SCI format, the time-frequency resource used by the PSCCH carrying the SCI, and the like.

It should also be understood that the various correspondences described above may be preconfigured in advance by the network device or pre-stored inside the terminal device.

Fig. 4 shows a schematic block diagram of a method 200 of determining a first multi-antenna transmission mode according to an embodiment of the application. The method 200 may be executed by a terminal device serving as a sending end in fig. 1 or fig. 2, where the method 200 includes some or all of the following:

s210, a second terminal device sends first information to a first terminal device, where the first information is used for the first terminal device to determine a first multi-antenna sending mode used by a data channel sent by the second terminal device.

Optionally, in this embodiment of the present application, the first multi-antenna transmission mode is one of a single-antenna port transmission mode, transmit diversity, spatial multiplexing, and beamforming.

Optionally, in this embodiment of the present application, the first information is sidelink control information SCI.

Optionally, in this embodiment of the present application, a bit in the SCI is used to indicate the first multi-antenna transmission mode.

Optionally, in this embodiment of the present application, the mask sequence adopted by the SCI is used to indicate the first multi-antenna transmission mode.

It should be understood that the interaction between the terminal device and the receiving end described by the sending end and the related characteristics, functions, etc. correspond to the related characteristics, functions, etc. of the terminal device at the receiving end. And related matters have been described in detail in the method 100, and are not repeated herein for brevity.

Fig. 5 shows a schematic block diagram of a method 300 of determining a first multi-antenna transmission mode according to an embodiment of the application. The method 300 may be executed by a terminal device as a transmitting end in fig. 1, where the method 300 includes some or all of the following:

s310, a second terminal device receives first information sent by a network device;

s320, the second terminal device determines, according to the first information, a first multi-antenna transmission mode of the data channel transmitted to the first terminal device by the second terminal device.

Similarly, the first terminal device may be referred to as a receiving end, and the second terminal device may be referred to as a transmitting end, and as can be seen from the foregoing, transmission resources of the transmitting end may be allocated by the network device. The network device may indicate, to the transmitting end, a first multi-antenna transmission mode in which the transmitting end transmits a data channel to the receiving end while allocating transmission resources to the transmitting end. Therefore, the transmitting end can transmit the data channel according to the first multi-antenna transmitting mode indicated by the network equipment, and the performance of data transmission can be further improved.

Optionally, in this embodiment of the present application, the first multi-antenna transmission mode indicated by the network device may be any one of the above four broad categories of multi-antenna transmission modes defined in LTE, and may also be a multi-antenna transmission mode defined in other communication systems. The first multi-antenna transmission mode according to the embodiment of the present application should not be limited to the above four.

Optionally, in this embodiment of the present application, the first Information may be Downlink Control Information (DCI) or Radio Resource Control (RRC) signaling, and the first Information may also be a system message or a broadcast message.

Alternatively, the network device may indicate the first multi-antenna transmission mode by bit display in the first information. For example, 2 bits in DCI may be used to indicate a first multi-antenna transmission mode. Similarly, 00 may indicate single antenna port transmission, 01 may indicate transmit diversity, 10 may indicate spatial multiplexing, and 11 may indicate beamforming. The network device may also use bits in the other information to indicate. Such as RRC signaling. The embodiments of the present application do not limit this.

Optionally, in this embodiment of the present application, if the first information is DCI, the network device may use the DCI to implicitly indicate the first multi-antenna transmission mode. Specifically, the network device may perform CRC processing on the DCI, perform a masking operation on the DCI, and implicitly indicate the first multi-antenna transmission mode through a masking sequence. The network device may also perform scrambling processing on the coded DCI, and implicitly indicate the first multi-antenna transmission mode through a scrambling sequence. It should be understood that the specific mask sequence and scrambling code sequence are not limited in the embodiments of the present application, and are similar to the above description of implicitly indicating the first multi-antenna transmission mode by using the mask sequence after the SCI is masked, and will not be described herein too much.

It should be understood that the network device may also implicitly indicate the first multi-antenna transmission mode by using other characteristics of the DCI, for example, the format of the DCI may be, or a time-frequency resource used by a Physical Downlink Control Channel (PDCCH) carrying the DCI.

Optionally, in this embodiment of the present application, the first information is used to indicate a mapping relationship between a state of a terminal device and a multi-antenna transmission mode, and the determining, by the second terminal device, a first multi-antenna transmission mode adopted by a data channel sent by the second terminal device to the first terminal device according to the first information includes: and the second terminal equipment determines the first multi-antenna transmission mode according to the mapping relation.

That is, the network device may not directly indicate the first multi-antenna transmission mode to the transmitting end, but may send some selection criteria to the transmitting end, and the transmitting end may select the corresponding multi-antenna transmission mode according to its own condition to send data to the receiving end. Specifically, the network device may send, to the sending end, a mapping relationship between the state of the terminal device and the multi-antenna sending mode. For example, the mapping relationship may be at least one of a correspondence relationship between a speed of the terminal device and the multi-antenna transmission mode, a correspondence relationship between the number of antennas of the terminal device and the multi-antenna transmission mode, a correspondence relationship between a synchronization source type of the terminal device and the multi-antenna transmission mode, a correspondence relationship between a traffic type of the terminal device and the multi-antenna transmission mode, a correspondence relationship between a Quality of Service (QoS) requirement corresponding to a traffic of the terminal device and the transmission mode, and the like. The embodiments of the present application do not limit this.

Taking the correspondence between the speed of the terminal device and the multi-antenna transmission mode as an example, the network device may configure the following table to the transmitting end:

the terminal equipment of the transmitting end can select a corresponding multi-antenna transmitting mode according to the speed of the terminal equipment, and when a plurality of multi-antenna transmitting modes are selectable, the terminal equipment of the transmitting end can autonomously select the corresponding multi-antenna transmitting mode based on an implementation mode.

Similarly, the network device may configure the correspondence between other states of the terminal device and the multi-antenna transmission mode. The embodiments of the present application do not limit this.

Optionally, the network device may indicate the mapping relationship semi-statically through RRC signaling, may indicate the mapping relationship to the sending end terminal device through DCI, broadcast message, or system message, or may define the mapping relationship in a predefined and preconfigured manner. The embodiments of the present application are not limited thereto.

Fig. 6 shows a schematic block diagram of a method 400 of determining a first multi-antenna transmission mode according to an embodiment of the application. The method 400 may be executed by a terminal device acting as a transmitting end in fig. 1, where the method 400 includes some or all of the following:

s410, the network device sends first information to the second terminal device, where the first information is used for the second terminal device to determine a first multi-antenna sending mode used by a data channel sent by the second terminal device to the first terminal device.

Therefore, in the method for determining the first multi-antenna transmission mode according to the embodiment of the present application, the transmitting end may transmit the data channel according to the first multi-antenna transmission mode indicated by the network device, so that the performance of data transmission may be improved.

Optionally, in this embodiment of the present application, the first information is downlink control information DCI or radio resource control RRC signaling.

Optionally, in this embodiment of the present application, a bit in the first information is used to indicate the first multi-antenna transmission mode.

Optionally, in this embodiment of the present application, the mask sequence or the scrambling sequence adopted by the DCI is used to indicate the first multi-antenna transmission mode.

Optionally, in this embodiment of the present application, the first information is used to indicate a mapping relationship between a state of the terminal device and a multi-antenna transmission mode.

Optionally, in this embodiment of the present application, the mapping relationship is at least one of a correspondence relationship between a speed of the terminal device and a transmission mode, a correspondence relationship between a number of antennas of the terminal device and the transmission mode, a correspondence relationship between a synchronization source type of the terminal device and the transmission mode, a correspondence relationship between a service type of the terminal device and the transmission mode, and a correspondence relationship between a quality of service QoS requirement corresponding to a service of the terminal device and the multi-antenna transmission mode.

It should be understood that the interaction between the network device and the terminal device at the sending end described in the network side and the related characteristics, functions, etc. correspond to the related characteristics, functions, etc. of the terminal device at the sending end. And related matters have been described in detail in the method 300, and are not repeated herein for brevity.

It should also be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

Having described the method for determining the first multi-antenna transmission mode according to the embodiment of the present application in detail above, an apparatus for determining the first multi-antenna transmission mode according to the embodiment of the present application will be described below with reference to fig. 7 to 14, and the technical features described in the embodiment of the method are applicable to the following embodiments of the apparatus.

Fig. 7 shows a schematic block diagram of a terminal device 500 of an embodiment of the present application. As shown in fig. 7, the terminal device 500 is a first terminal device, and the terminal device 500 includes:

a receiving unit 510, configured to receive first information sent by a second terminal device;

a determining unit 520, configured to determine, according to the first information, a first multi-antenna transmission mode used by the data channel transmitted by the second terminal device.

Therefore, in the terminal device according to the embodiment of the present application, the sending end indicates the first multi-antenna sending mode adopted by the data channel sent by the receiving end, so that the receiving end can accurately receive the data sent by the sending end, and the performance of system transmission is further improved.

Optionally, in this embodiment of the present application, the first multi-antenna transmission mode is one of single-antenna port transmission, transmit diversity, spatial multiplexing, and beamforming.

Optionally, in this embodiment of the application, the determining unit is specifically configured to: the first multi-antenna transmission mode is determined based on the bits in the SCI.

Optionally, in this embodiment of the application, the determining unit is specifically configured to: the first multi-antenna transmission mode is determined based on the mask sequence employed by the SCI.

It should be understood that the terminal device 500 according to the embodiment of the present application may correspond to the first terminal device in the embodiment of the method of the present application, and the above and other operations and/or functions of each unit in the terminal device 500 are respectively for implementing the corresponding flow of the first terminal device in the method of fig. 3, and are not described herein again for brevity.

Fig. 8 shows a schematic block diagram of a terminal device 600 according to an embodiment of the present application. As shown in fig. 8, the terminal device 600 is a second terminal device, and the terminal device 600 includes:

a sending unit, configured to send first information to a first terminal device, where the first information is used by the first terminal device to determine a first multi-antenna sending mode used by a data channel sent by a second terminal device.

It should be understood that the terminal device 600 according to the embodiment of the present application may correspond to a second terminal device in the embodiment of the method of the present application, and the above and other operations and/or functions of each unit in the terminal device 600 are respectively for implementing a corresponding flow of the second terminal device in the method of fig. 4, and are not described herein again for brevity.

Fig. 9 shows a schematic block diagram of a terminal device 700 according to an embodiment of the present application. As shown in fig. 9, the terminal device 700 is a second terminal device, and the terminal device 700 includes:

a receiving unit 710, configured to receive first information sent by a network device;

a determining unit 720, configured to determine, according to the first information, a first multi-antenna transmission mode of the data channel transmitted by the second terminal device to the first terminal device.

Therefore, in the terminal device of the embodiment of the present application, the sending end may send the data channel according to the first multi-antenna sending mode indicated by the network device, so that the performance of data transmission may be improved.

Optionally, in this embodiment of the application, the determining unit is specifically configured to: and determining the first multi-antenna transmission mode according to the bits in the first information.

Optionally, in this embodiment of the application, the determining unit is specifically configured to: and determining the first multi-antenna transmission mode according to the mask sequence or the scrambling code sequence adopted by the DCI.

Optionally, the second terminal device receives DCI sent by the network device, where the DCI indicates a transmission resource of a data channel psch of the second terminal device, and the second terminal device determines, according to a resource pool where the data channel psch is located and the second corresponding relationship, a first multi-antenna transmission mode used by the data channel. The second correspondence may be a correspondence between resource pool information and a multi-antenna transmission mode.

Optionally, in this embodiment of the present application, the first information is used to indicate a mapping relationship between a state of the terminal device and a multi-antenna transmission mode, and the determining unit is specifically configured to: and determining the first multi-antenna transmission mode according to the mapping relation.

Optionally, in this embodiment of the present application, the mapping relationship is at least one of a correspondence relationship between a speed of the terminal device and a multi-antenna transmission mode, a correspondence relationship between the number of antennas of the terminal device and the multi-antenna transmission mode, a correspondence relationship between a synchronization source type of the terminal device and the multi-antenna transmission mode, a correspondence relationship between a service type of the terminal device and the multi-antenna transmission mode, and a correspondence relationship between a quality of service QoS requirement corresponding to a service of the terminal device and the transmission mode.

It should be understood that the terminal device 700 according to the embodiment of the present application may correspond to a second terminal device in the embodiment of the method of the present application, and the above and other operations and/or functions of each unit in the terminal device 700 are respectively for implementing a corresponding process of the second terminal device in the method of fig. 5, and are not described herein again for brevity.

Fig. 10 shows a schematic block diagram of a network device 800 of an embodiment of the application. As shown in fig. 10, the network device 800 includes:

a sending unit 810, configured to send first information to a second terminal device, where the first information is used by the second terminal device to determine a first multi-antenna sending mode used by a data channel sent by the second terminal device to a first terminal device.

Therefore, in the network device according to the embodiment of the present application, the sending end may send the data channel according to the first multi-antenna sending mode indicated by the network device, so that the performance of data transmission may be improved.

It should be understood that the network device 800 according to the embodiment of the present application may correspond to a network device in the embodiment of the method of the present application, and the above and other operations and/or functions of each unit in the network device 800 are respectively for implementing a corresponding flow of the network device in the method of fig. 6, and are not described herein again for brevity.

As shown in fig. 11, an embodiment of the present application further provides a terminal device 900, where the terminal device 900 may be the terminal device 500 in fig. 7, which can be used to execute the content of the terminal device corresponding to the method 100 in fig. 3. The terminal apparatus 900 includes: an input interface 910, an output interface 920, a processor 930, and a memory 940, the input interface 910, the output interface 920, the processor 930, and the memory 940 being connected by a bus system. The memory 940 is used to store programs, instructions or code. The processor 930 is configured to execute the program, instructions or codes in the memory 940 to control the input interface 910 to receive signals, control the output interface 920 to send signals, and perform the operations of the foregoing method embodiments.

It should be understood that, in the embodiment of the present application, the processor 930 may be a Central Processing Unit (CPU), and the processor 930 may also be other general processors, digital signal processors, application specific integrated circuits, off-the-shelf programmable gate arrays or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The memory 940 may include a read-only memory and a random access memory, and provides instructions and data to the processor 930. A portion of memory 940 may also include non-volatile random access memory. For example, the memory 940 may also store information of device types.

In implementation, various aspects of the methods described above may be performed by instructions in the form of hardware, integrated logic circuits, or software in processor 930. The contents of the method disclosed in connection with the embodiments of the present application may be directly embodied as a hardware processor, or may be implemented by a combination of hardware and software modules in a processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory 940, and a processor 930 reads the information in the memory 940 and implements the contents of the above-mentioned method in conjunction with hardware thereof. To avoid repetition, it is not described in detail here.

In a specific embodiment, the receiving unit in the terminal device 500 may be implemented by the input interface 910 in fig. 11, and the determining unit in the terminal device 500 may be implemented by the processor 930 in fig. 11.

As shown in fig. 12, an embodiment of the present application further provides a terminal device 1000, where the terminal device 1000 may be the terminal device 600 in fig. 8, and can be used to execute the content of the terminal device corresponding to the method 200 in fig. 4. The terminal device 1000 includes: an input interface 1010, an output interface 1020, a processor 1030, and a memory 1040, the input interface 1010, the output interface 1020, the processor 1030, and the memory 1040 being connectable via a bus system. The memory 1040 is used to store programs, instructions or code. The processor 1030 is configured to execute the programs, instructions or codes in the memory 1040 to control the input interface 1010 to receive signals, control the output interface 1020 to transmit signals, and perform the operations in the foregoing method embodiments.

It should be understood that, in the embodiment of the present application, the processor 1030 may be a Central Processing Unit (CPU), and the processor 1030 may also be other general processors, digital signal processors, application specific integrated circuits, off-the-shelf programmable gate arrays or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The memory 1040 may include both read-only memory and random access memory, and provides instructions and data to the processor 1030. A portion of the memory 1040 may also include non-volatile random access memory. For example, the memory 1040 may also store device type information.

In implementation, various aspects of the methods described above may be performed by instructions in the form of hardware, integrated logic circuits, or software in processor 1030. The contents of the method disclosed in connection with the embodiments of the present application may be directly embodied as a hardware processor, or may be implemented by a combination of hardware and software modules in a processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 1040, and the processor 1030 reads the information in the memory 1040, and implements the above method in combination with hardware thereof. To avoid repetition, it is not described in detail here.

In a specific embodiment, the sending unit in the terminal device 600 can be implemented by the output interface 1020 in fig. 12.

As shown in fig. 13, an embodiment of the present application further provides a terminal device 2000, where the terminal device 2000 may be the terminal device 700 in fig. 9, which can be used to execute the content of the terminal device corresponding to the method 300 in fig. 5. The terminal device 2000 includes: the input interface 2010, the output interface 2020, the processor 2030 and the memory 2040 may be connected by a bus system. The memory 2040 is used to store programs, instructions or code. The processor 2030 is configured to execute the programs, instructions or codes in the memory 2040 to control the input interface 2010 to receive signals, control the output interface 2020 to transmit signals, and perform the operations of the foregoing method embodiments.

It should be understood that, in the embodiment of the present application, the processor 2030 may be a Central Processing Unit (CPU), and the processor 2030 may also be other general-purpose processor, a digital signal processor, an application specific integrated circuit, an off-the-shelf programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The memory 2040 may include both read-only memory and random-access memory, and provides instructions and data to the processor 2030. A portion of the memory 2040 may also include non-volatile random access memory. For example, the memory 2040 may also store device type information.

In implementation, the contents of the above methods may be implemented by integrated logic circuits of hardware or instructions in the form of software in the processor 2030. The contents of the method disclosed in connection with the embodiments of the present application may be directly embodied as a hardware processor, or may be implemented by a combination of hardware and software modules in a processor. The software modules may be located in random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, or other storage media as is known in the art. The storage medium is located in the memory 2040, and the processor 2030 reads the information in the memory 2040 and combines the hardware to implement the above method. To avoid repetition, it is not described in detail here.

In a specific embodiment, the receiving unit in the terminal device 700 may be implemented by the input interface 2010 in fig. 13, and the determining unit in the terminal device 700 may be implemented by the processor 2030 in fig. 13.

As shown in fig. 14, an embodiment of the present application further provides a network device 3000, where the network device 3000 may be the network device 800 in fig. 10, which can be used to execute the content of the network device corresponding to the method 400 in fig. 6. The network device 3000 includes: an input interface 3010, an output interface 3020, a processor 3030, and a memory 3040, and the input interface 3010, the output interface 3020, the processor 3030, and the memory 3040 may be connected by a bus system. The memory 3040 is used to store programs, instructions, or code. The processor 3030 is configured to execute programs, instructions or codes in the memory 3040 to control the input interface 3010 to receive signals, control the output interface 3020 to send signals, and perform the operations in the foregoing method embodiments.

It should be understood that, in the embodiment of the present application, the processor 3030 may be a Central Processing Unit (CPU), and the processor 3030 may also be other general-purpose processors, digital signal processors, application specific integrated circuits, off-the-shelf programmable gate arrays or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The memory 3040 may include both read-only memory and random access memory, and provides instructions and data to the processor 3030. A portion of the memory 3040 may also include non-volatile random access memory. For example, the memory 3040 may also store information of device types.

In implementation, each of the above methods may be implemented by an integrated logic circuit of hardware or an instruction in the form of software in the processor 3030. The contents of the method disclosed in connection with the embodiments of the present application may be directly embodied as a hardware processor, or may be implemented by a combination of hardware and software modules in a processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 3040, and the processor 3030 reads the information in the memory 3040 and completes the contents of the above method in combination with the hardware thereof. To avoid repetition, it is not described in detail here.

In a specific embodiment, the sending unit in the network device 800 may be implemented by the output interface 3020 in fig. 14.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the unit is only one logical functional division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

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.

This functionality, if implemented in the form of software functional units 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 application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to perform all or part of the steps of the embodiments of the present application. 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.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

A method for determining a first multi-antenna transmission mode, the method being applied to a vehicle networking system, the method comprising:

the method comprises the steps that first terminal equipment receives first information sent by second terminal equipment;

and the first terminal equipment determines a first multi-antenna transmission mode adopted by a data channel transmitted by the second terminal equipment according to the first information.
The method of claim 1, wherein the first multi-antenna transmission mode is one of single antenna port transmission, transmit diversity, spatial multiplexing, and beamforming.
The method according to claim 1 or 2, wherein the first information is sidelink control information SCI.
The method of claim 3, wherein the determining, by the first terminal device, the first multi-antenna transmission mode used by the data channel transmitted by the second terminal device according to the first information comprises:

and the first terminal equipment determines the first multi-antenna transmission mode according to the bit in the SCI.
The method of claim 3, wherein the determining, by the first terminal device, the first multi-antenna transmission mode used by the data channel transmitted by the second terminal device according to the first information comprises:

and the first terminal equipment determines the first multi-antenna transmission mode according to the mask sequence adopted by the SCI.
A method for determining a first multi-antenna transmission mode, the method being applied to a vehicle networking system, the method comprising:

the method comprises the steps that a second terminal device sends first information to a first terminal device, wherein the first information is used for the first terminal device to determine a first multi-antenna sending mode adopted by a data channel sent by the second terminal device.
The method of claim 6, wherein the first multi-antenna transmission mode is one of a single antenna port transmission mode, transmit diversity, spatial multiplexing, and beamforming.
The method according to claim 6 or 7, wherein the first information is sidelink control information SCI.
The method of claim 8 wherein bits in the SCI are used to indicate the first multi-antenna transmission mode.
The method of claim 8 wherein the masking sequence employed by the SCI indicates the first multi-antenna transmission mode.
A method for determining a first multi-antenna transmission mode, the method being applied to a vehicle networking system, the method comprising:

the second terminal equipment receives first information sent by the network equipment;

and the second terminal equipment determines a first multi-antenna transmission mode of a data channel transmitted to the first terminal equipment by the second terminal equipment according to the first information.
The method of claim 11, wherein the first multi-antenna transmission mode is one of single antenna port transmission, transmit diversity, spatial multiplexing, and beamforming.
The method according to claim 11 or 12, wherein the first information is downlink control information, DCI, or radio resource control, RRC, signaling.
The method according to any of claims 11 to 13, wherein the second terminal device determines, according to the first information, a first multi-antenna transmission mode of a data channel transmitted by the second terminal device to the first terminal device, including:

and the second terminal equipment determines the first multi-antenna transmission mode according to the bit in the first information.
The method of claim 13, wherein the second terminal device determines, according to the first information, a first multi-antenna transmission mode of a data channel transmitted by the second terminal device to the first terminal device, and wherein the determining comprises:

and the second terminal equipment determines the first multi-antenna transmission mode according to the mask sequence or the scrambling code sequence adopted by the DCI.
The method according to any one of claims 11 to 13, wherein the first information is used to indicate a mapping relationship between a state of a terminal device and a multi-antenna transmission mode, and the second terminal device determines, according to the first information, a first multi-antenna transmission mode adopted by a data channel transmitted by the second terminal device to the first terminal device, including:

and the second terminal equipment determines the first multi-antenna sending mode according to the mapping relation.
The method of claim 16, wherein the mapping relationship is at least one of a correspondence relationship between a speed of the terminal device and a multi-antenna transmission mode, a correspondence relationship between a number of antennas of the terminal device and the multi-antenna transmission mode, a correspondence relationship between a synchronization source type of the terminal device and the multi-antenna transmission mode, a correspondence relationship between a service type of the terminal device and the multi-antenna transmission mode, and a correspondence relationship between a quality of service (QoS) requirement corresponding to a service of the terminal device and the transmission mode.
A method for determining a first multi-antenna transmission mode, the method being applied to a vehicle networking system, the method comprising:

the network equipment sends first information to second terminal equipment, wherein the first information is used for the second terminal equipment to determine a first multi-antenna sending mode adopted by a data channel sent to the first terminal equipment by the second terminal equipment.
The method of claim 18, wherein the first multi-antenna transmission mode is one of a single antenna port transmission mode, transmit diversity, spatial multiplexing, and beamforming.
The method according to claim 18 or 19, wherein the first information is downlink control information, DCI, or radio resource control, RRC, signaling.
The method according to any of claims 18 to 20, wherein bits in the first information are used to indicate the first multi-antenna transmission mode.
The method of claim 20, wherein a masking sequence or a scrambling sequence employed by the DCI is used to indicate the first multi-antenna transmission mode.
The method according to any of claims 18 to 20, wherein the first information is used for indicating a mapping relationship between a state of a terminal device and a multi-antenna transmission mode.
The method of claim 23, wherein the mapping relationship is at least one of a correspondence relationship between a speed of the terminal device and a transmission mode, a correspondence relationship between a number of antennas of the terminal device and the transmission mode, a correspondence relationship between a synchronization source type of the terminal device and the transmission mode, a correspondence relationship between a service type of the terminal device and the transmission mode, and a correspondence relationship between a quality of service (QoS) requirement corresponding to the service of the terminal device and the multi-antenna transmission mode.
A terminal device, wherein the terminal device is a first terminal device, comprising:

the receiving unit is used for receiving first information sent by second terminal equipment;

a determining unit, configured to determine, according to the first information, a first multi-antenna transmission mode adopted by a data channel transmitted by the second terminal device.
The terminal device of claim 25, wherein the first multi-antenna transmission mode is one of single antenna port transmission, transmit diversity, spatial multiplexing, and beamforming.
The terminal device according to claim 25 or 26, wherein said first information is sidelink control information SCI.
The terminal device of claim 27, wherein the determining unit is specifically configured to:

determining the first multi-antenna transmission mode according to bits in the SCI.
The terminal device of claim 27, wherein the determining unit is specifically configured to:

and determining the first multi-antenna transmission mode according to the mask sequence adopted by the SCI.
A terminal device, wherein the terminal device is a second terminal device, comprising:

a sending unit, configured to send first information to a first terminal device, where the first information is used by the first terminal device to determine a first multi-antenna sending mode used by a data channel sent by a second terminal device.
The terminal device of claim 30, wherein the first multi-antenna transmission mode is one of a single antenna port transmission mode, transmit diversity, spatial multiplexing, and beamforming.
The terminal device according to claim 30 or 31, wherein said first information is sidelink control information SCI.
The terminal device of claim 32, wherein bits in the SCI are used to indicate the first multi-antenna transmission mode.
The terminal device of claim 32, wherein the masking sequence employed by the SCI indicates the first multi-antenna transmission mode.
A terminal device, wherein the terminal device is a second terminal device, comprising:

the receiving unit is used for receiving first information sent by the network equipment;

and the determining unit is used for determining a first multi-antenna transmission mode of a data channel transmitted to the first terminal equipment by the second terminal equipment according to the first information.
The terminal device of claim 35, wherein the first multi-antenna transmission mode is one of single antenna port transmission, transmit diversity, spatial multiplexing, and beamforming.
The terminal device according to claim 35 or 36, wherein the first information is downlink control information, DCI, or radio resource control, RRC, signaling.
The terminal device according to any one of claims 35 to 37, wherein the determining unit is specifically configured to:

and determining the first multi-antenna transmission mode according to the bits in the first information.
The terminal device of claim 37, wherein the determining unit is specifically configured to:

and determining the first multi-antenna transmission mode according to the mask sequence or the scrambling code sequence adopted by the DCI.
The terminal device according to any one of claims 35 to 37, wherein the first information is used to indicate a mapping relationship between a state of the terminal device and a multi-antenna transmission mode, and the determining unit is specifically configured to:

and determining the first multi-antenna transmission mode according to the mapping relation.
The terminal device according to claim 40, wherein the mapping relationship is at least one of a correspondence relationship between a speed of the terminal device and a multi-antenna transmission mode, a correspondence relationship between a number of antennas of the terminal device and the multi-antenna transmission mode, a correspondence relationship between a synchronization source type of the terminal device and the multi-antenna transmission mode, a correspondence relationship between a service type of the terminal device and the multi-antenna transmission mode, and a correspondence relationship between a quality of service (QoS) requirement corresponding to the service of the terminal device and the transmission mode.
A network device, comprising:

a sending unit, configured to send first information to a second terminal device, where the first information is used by the second terminal device to determine a first multi-antenna sending mode used by a data channel sent by the second terminal device to a first terminal device.
The network device of claim 42, wherein the first multi-antenna transmission mode is one of a single antenna port transmission mode, transmit diversity, spatial multiplexing, and beamforming.
The network device of claim 42 or 43, wherein the first information is Downlink Control Information (DCI) or Radio Resource Control (RRC) signaling.
The network device of any one of claims 42 to 44, wherein bits in the first information are used to indicate the first multi-antenna transmission mode.
The network device of claim 44, wherein a masking sequence or a scrambling sequence employed by the DCI is used to indicate the first multi-antenna transmission mode.
The network device according to any of claims 42 to 44, wherein the first information is used to indicate a mapping relationship between a state of a terminal device and a multi-antenna transmission mode.
The network device according to claim 47, wherein the mapping relationship is at least one of a correspondence relationship between a speed of a terminal device and a transmission mode, a correspondence relationship between a number of antennas of the terminal device and the transmission mode, a correspondence relationship between a synchronization source type of the terminal device and the transmission mode, a correspondence relationship between a service type of the terminal device and the transmission mode, and a correspondence relationship between a quality of service (QoS) requirement corresponding to the service of the terminal device and the multi-antenna transmission mode.