WO2020083317A9

WO2020083317A9 - Communication method and user equipment

Info

Publication number: WO2020083317A9
Application number: PCT/CN2019/112806
Authority: WO
Inventors: 薛祎凡; 才宇; 曾勇波
Original assignee: 华为技术有限公司
Priority date: 2018-10-27
Filing date: 2019-10-23
Publication date: 2020-06-25
Also published as: CN111107671A; WO2020083317A1; CN111107671B

Abstract

Provided are a communication method and user equipments. The method comprises: a first user equipment sending sidelink control information (SCI) to a second user equipment, wherein the SCI is used for indicating or comprising identification information of the first user equipment and identification information of the second user equipment, or the SCI is used for indicating or comprising identification information of the first user equipment and some identification information of the second user equipment, or the SCI is used for indicating or comprising some identification information of the first user equipment and identification information of the second user equipment; and the first user equipment sending data to the second user equipment, wherein the SCI comprises scheduling information of the data. Correspondingly, further provided are corresponding user equipments. The implementation of the present application can effectively improve the efficiency of sidelink transmission.

Description

Communication method and terminal equipment

This application requires the priority of the Chinese patent application filed on October 27, 2018, with the application number 201811272830.4 and the invention titled "Communication Method and Terminal Equipment", the entire contents of which are incorporated by reference in this application.

Technical field

This application relates to the field of communication technology, and in particular, to a communication method and terminal equipment.

Background technique

With the evolution of communication technology, the Internet of Everything is also accelerating. The technology of the Internet of Everything includes not only narrowband Internet of Things (NB-LOT) technology and enhanced machine type communication (eMTC), but also It can include Internet of Things, device-to-device (D2D) technology, and so on.

Among them, for D2D technology, two terminal devices (user equipment, UE) can directly send data, that is, there is no need to send the data to the base station first, and then forward through the core network, etc., which can greatly reduce the data delay . In other words, in the above-mentioned sidelink transmission, the UE communicates with each other. For example, one UE can send signals to multiple UEs, and can also receive signals from multiple UEs.

Therefore, the direct transmission of objects is a problem being studied by those skilled in the art.

Summary of the invention

The present application provides a communication method and terminal equipment, which can effectively improve the efficiency of direct connection transmission of objects.

In a first aspect, an embodiment of the present application provides a communication method, including:

The first terminal device sends direct link control information (sidelink control information, SCI) to the second terminal device; the first terminal device sends data to the second terminal device, and the SCI includes the scheduling of the data Information; wherein, the SCI is used to indicate or include the identification information of the first terminal device and the identification information of the second terminal device, or the SCI is used to indicate or include the identification of the first terminal device Information and partial identification information of the second terminal device, or the SCI is used to indicate or include partial identification information of the first terminal device and identification information of the second terminal device.

Implementing the embodiments of the present application, indicating the identification information of the first terminal device and the identification information of the second terminal device through the SCI, etc., may enable the second terminal device to obtain which two UEs the transceiver is based on the SCI, that is, the first The second terminal device can effectively know which UE the data sending UE is and whether the data is sent to the second terminal device, thereby effectively improving the efficiency of information exchange and the efficiency of direct object transmission.

In a possible implementation manner, the SCI includes any one of the following: identification information of the first terminal device and identification information of the second terminal device; identification information of the first terminal device, and Cyclic redundancy check (CRC) information scrambled according to the identification information of the second terminal device; the identification information of the second terminal device and the identification information of the first terminal device CRC information obtained by scrambling; CRC information scrambled according to the identification information of the first terminal device and the identification information of the second terminal device.

In a possible implementation manner, the identification information of the first terminal device includes first identification information and second identification information, and the identification information of the second terminal device includes third identification information and fourth identification information; The SCI includes the first identification information, the identification information of the second terminal device, and the CRC information scrambled according to the second identification information; or, the SCI includes the third identification information, all The identification information of the first terminal device and the CRC information scrambled according to the fourth identification information.

In a possible implementation manner, the identification information of the first terminal device includes first identification information and second identification information, and the identification information of the second terminal device includes third identification information and fourth identification information; The SCI includes the CRC information scrambled according to the first identification information and the identification information of the second terminal device; or, the SCI includes the identification information according to the first terminal device and the third The CRC information obtained by scrambling the identification information.

In a possible implementation, when the SCI includes CRC information scrambled according to the first identification information and the identification information of the second terminal device, the SCI also includes the Second identification information; or, the data includes the second identification information.

In a possible implementation manner, in the case where the SCI includes CRC information scrambled according to the identification information of the first terminal device and the third identification information, the SCI also includes the Fourth identification information; or, the data includes the fourth identification information.

In a second aspect, an embodiment of the present application further provides a communication method, including:

The first terminal device sends data to the second terminal device; the first terminal device receives feedback information from the second terminal device; the first terminal device determines the identity of the second terminal device based on the feedback information Information; wherein, the feedback information is used to feedback whether the data is correctly received, and the feedback information is also used to indicate or include the identification information of the first terminal device and the identification information of the second terminal device At least one.

In a possible implementation manner, the feedback information includes any one of the following: identification information of the first terminal device and identification information of the second terminal device; identification information of the first terminal device, and basis Cyclic redundancy check CRC information scrambled by the identification information of the second terminal device; identification information of the second terminal device, and CRC information scrambled according to the identification information of the first terminal device; based on the CRC information obtained by scrambling the identification information of the first terminal device and the identification information of the second terminal device.

In a possible implementation manner, the identification information of the first terminal device includes first identification information and second identification information, and the identification information of the second terminal device includes third identification information and fourth identification information; The feedback information includes the first identification information, the identification information of the second terminal device, and the CRC information scrambled according to the second identification information; or, the feedback information includes the first terminal device , The third identification information, and the CRC information scrambled according to the fourth identification information.

In a possible implementation manner, the identification information of the first terminal device includes first identification information and second identification information, and the identification information of the second terminal device includes third identification information and fourth identification information; The feedback information includes the first identification information, and CRC information scrambled according to the second identification information and the identification information of the second terminal device; or, the feedback information includes the third identification Information, and CRC information scrambled according to the identification information of the first terminal device and the fourth identification information.

In a possible implementation manner, the first terminal device receiving the feedback information from the second terminal device includes: the first terminal device receiving the second terminal device sends the first channel through the second channel Feedback information; wherein, the ZC sequence used by the first channel is generated according to the identification information of the first terminal device and the identification information of the second terminal device.

In a third aspect, an embodiment of the present application also provides a communication method, including:

The first terminal device sends direct link control information SCI to the second terminal device; the first terminal device sends data to the second terminal device, and the SCI includes scheduling information of the data; wherein, the SCI is used to indicate or include identification information of the first terminal device and identification information of the second terminal device, or the SCI is used to indicate or include identification information of the first terminal device and the second terminal device Partial identification information of the terminal device, or the SCI is used to indicate or include partial identification information of the first terminal device and identification information of the second terminal device.

In a possible implementation manner, the SCI includes any one of the following: identification information of the first terminal device and identification information of the second terminal device; identification information of the first terminal device, and Cyclic redundancy check CRC information scrambled according to the identification information of the second terminal device; identification information of the second terminal device, and CRC information scrambled according to the identification information of the first terminal device; CRC information scrambled according to the identification information of the first terminal device and the identification information of the second terminal device.

In a possible implementation manner, the method further includes: the first terminal device receives feedback information from the second terminal device; the first terminal device determines the second terminal according to the feedback information Device identification information; wherein, the feedback information is used to feed back whether the data is received correctly, and the feedback information is also used to indicate or include the identification information of the first terminal device and the identification of the second terminal device At least one item of information.

According to a fourth aspect, an embodiment of the present application further provides a communication method, including:

The first terminal device sends direct link control information SCI to the second terminal device; the first terminal device sends data to the second terminal device, and the SCI includes scheduling information of the data; wherein the SCI It is used to indicate or include partial identification information of the first terminal device, or the SCI is used to indicate or include partial identification information of the second terminal device.

In a possible implementation manner, the identification information of the first terminal device includes first identification information and second identification information, and the identification information of the second terminal device includes third identification information and fourth identification information;

The SCI includes CRC information scrambled according to the first identification information, and the data includes the second identification information and identification information of the second terminal device;

Alternatively, the SCI includes CRC information scrambled according to the third identification information, and the data includes identification information of the first terminal device and the fourth identification information.

According to a fifth aspect, an embodiment of the present application further provides a communication method, including:

The second terminal device receives the direct link control information SCI from the first terminal device; the second terminal device receives data from the first terminal device; the second terminal device determines the first Identification information of a terminal device, or the second terminal device determines the identification information of the first terminal device according to the SCI and the data; wherein, the SCI is used to indicate or include the first terminal device Identification information and identification information of the second terminal device, or the SCI is used to indicate or include identification information of the first terminal device and partial identification information of the second terminal device, or, the SCI It is used to indicate or include partial identification information of the first terminal device and identification information of the second terminal device; the SCI includes scheduling information of the data.

According to a sixth aspect, an embodiment of the present application further provides a communication method, including:

The second terminal device receives data from the first terminal device; the second terminal device sends feedback information to the first terminal device, the feedback information is used to feedback whether the data is received correctly, and the feedback information is also It is used to indicate or include at least one item of identification information of the first terminal device and identification information of the second terminal device.

In a possible implementation, the second terminal device sending feedback information to the first terminal device includes: the second terminal device sending the feedback information to the first terminal device through a first channel Wherein the ZC sequence used by the first channel is generated based on the identification information of the first terminal device and the identification information of the second terminal device.

According to a seventh aspect, an embodiment of the present application further provides a communication method, including:

In a possible implementation manner, the method further includes: the second terminal device sends feedback information to the first terminal device, the feedback information is used to feedback whether the data is received correctly, and the feedback The information is also used to indicate at least one of the identification information of the first terminal device and the identification information of the second terminal device.

According to an eighth aspect, an embodiment of the present application further provides a communication method, including:

The second terminal device receives direct link control information SCI from the first terminal device; the second terminal device receives data from the first terminal device, and the SCI includes scheduling information of the data; wherein The SCI is used to indicate or include partial identification information of the first terminal device, or the SCI is used to indicate or include partial identification information of the second terminal device.

In a possible implementation manner, the identification information of the first terminal device includes first identification information and second identification information, and the identification information of the second terminal device includes third identification information and fourth identification information; The SCI includes CRC information scrambled according to the first identification information, and the data includes the second identification information and identification information of the second terminal device; or, the SCI includes the CRC information obtained by scrambling the third identification information, and the data includes identification information of the first terminal device and the fourth identification information.

According to a ninth aspect, an embodiment of the present application provides a first terminal device, where the first terminal device includes:

A sending unit, configured to send direct link control information SCI to a second terminal device; wherein, the SCI is used to indicate or include identification information of the first terminal device and identification information of the second terminal device, or , The SCI is used to indicate or include identification information of the first terminal device and partial identification information of the second terminal device, or the SCI is used to indicate or include partial identification information of the first terminal device And identification information of the second terminal device;

The sending unit is further configured to send data to the second terminal device, and the SCI includes scheduling information of the data.

According to a tenth aspect, an embodiment of the present application provides a terminal device. The terminal device includes a first terminal device, and the first terminal device includes:

The sending unit is used to send data to the second terminal device; the receiving unit is used to receive feedback information from the second terminal device; wherein the feedback information is used to feed back whether the data is received correctly and the feedback The information is also used to indicate or include at least one of the identification information of the first terminal device and the identification information of the second terminal device; the determining unit is configured to determine the second terminal device's Identification information.

According to an eleventh aspect, an embodiment of the present application further provides a first terminal device, where the first terminal device includes:

The sending unit is used to send the direct link control information SCI to the second terminal device; the sending unit is also used to send data to the second terminal device, and the SCI includes scheduling information of the data; wherein , The SCI is used to indicate or include the identification information of the first terminal device and the identification information of the second terminal device, or the SCI is used to indicate or include the identification information of the first terminal device and the The partial identification information of the second terminal device, or the SCI is used to indicate or include the partial identification information of the first terminal device and the identification information of the second terminal device.

In a possible implementation manner, the first terminal device further includes:

A receiving unit, configured to receive feedback information from the second terminal device; a determining unit, configured to determine identification information of the second terminal device based on the feedback information; wherein, the feedback information is used to feed back the data Whether it is received correctly, and the feedback information is also used to indicate or include at least one of the identification information of the first terminal device and the identification information of the second terminal device.

In a twelfth aspect, an embodiment of the present application further provides a first terminal device, where the first terminal device includes:

The sending unit is used to send the direct link control information SCI to the second terminal device; the sending unit is also used to send data to the second terminal device, and the SCI includes scheduling information of the data; wherein The SCI is used to indicate partial identification information of the first terminal device, or the SCI is used to indicate partial identification information of the second terminal device.

According to a thirteenth aspect, an embodiment of the present application provides a second terminal device, where the second terminal device includes:

A receiving unit, configured to receive direct link control information SCI from a first terminal device; wherein, the SCI is used to indicate identification information of the first terminal device and identification information of the second terminal device, or, The SCI is used to indicate or include identification information of the first terminal device and partial identification information of the second terminal device, or the SCI is used to indicate or include partial identification information of the first terminal device and Identification information of the second terminal device; the receiving unit is further used to receive data from the first terminal device, and the SCI includes scheduling information of the data; the determining unit is used to determine data based on the SCI The identification information of the first terminal device is determined, or the second terminal device determines the identification information of the first terminal device according to the SCI and the data.

According to a fourteenth aspect, an embodiment of the present application further provides a second terminal device, where the second terminal device includes:

The receiving unit is used to receive data from the first terminal device; the sending unit is used to send feedback information to the first terminal device, the feedback information is used to feedback whether the data is correctly received, and the feedback information is also It is used to indicate or include at least one item of identification information of the first terminal device and identification information of the second terminal device.

In a possible implementation manner, the sending unit is specifically configured to send the feedback information to the first terminal device through the first channel; wherein, the ZC sequence used by the first channel is based on the first The identification information of the terminal device and the identification information of the second terminal device are generated.

According to a fifteenth aspect, an embodiment of the present application further provides a second terminal device, where the second terminal device includes:

A receiving unit, configured to receive direct link control information SCI from a first terminal device; wherein, the SCI is used to indicate or include identification information of the first terminal device and identification information of the second terminal device, Alternatively, the SCI is used to indicate or include identification information of the first terminal device and part of identification information of the second terminal device, or the SCI is used to indicate or include partial identification of the first terminal device Information and identification information of the second terminal device; the receiving unit is also used to receive data from the first terminal device, the SCI includes scheduling information of the data; the determining unit is used to determine The SCI determines the identification information of the first terminal device, or the second terminal device determines the identification information of the first terminal device based on the SCI and the data.

In a possible implementation manner, the second terminal device further includes: a sending unit, configured to send feedback information to the first terminal device, the feedback information is used to feed back whether the data is correctly received, and The feedback information is also used to indicate or include at least one of the identification information of the first terminal device and the identification information of the second terminal device.

According to a sixteenth aspect, an embodiment of the present application further provides a second terminal device, where the second terminal device includes:

The receiving unit is used to receive direct link control information SCI from the first terminal device; the receiving unit is also used to receive data from the first terminal device, the SCI includes scheduling information of the data Wherein the SCI is used to indicate or include part of the identification information of the first terminal device, or the SCI is used to indicate or include part of the identification information of the second terminal device.

According to a seventeenth aspect, an embodiment of the present application provides a first terminal device, where the first terminal device includes a processor, a memory, and a transceiver, the processor and the memory are coupled, and the processor is used to run Instructions or programs in the memory, the transceiver is coupled to the processor, and the transceiver is used to send direct link control information SCI to a second terminal device; wherein, the SCI is used to indicate or include the The identification information of the first terminal device and the identification information of the second terminal device, or the SCI is used to indicate or include the identification information of the first terminal device and part of the identification information of the second terminal device, or , The SCI is used to indicate or include partial identification information of the first terminal device and identification information of the second terminal device; and the transceiver is also used to send data to the second terminal device, so The SCI includes scheduling information of the data.

In an eighteenth aspect, an embodiment of the present application provides a first terminal device. The first terminal device includes a processor, a memory, and a transceiver. The processor and the memory are coupled. The processor is used to run Instructions or programs in the memory, the transceiver is coupled to the processor, the transceiver is used to send data to a second terminal device; the transceiver is also used to receive data from the second terminal device Feedback information; wherein, the feedback information is used to feed back whether the data is correct, and the feedback information is also used to indicate at least one of the identification information of the first terminal device and the identification information of the second terminal device One item; the processor, used to determine the identification information of the second terminal device according to the feedback information.

In a nineteenth aspect, an embodiment of the present application provides a first terminal device. The first terminal device includes a processor, a memory, and a transceiver. The memory can be used to store programs. The processor can be used to execute The program stored in the memory, when the program is executed, causes the first terminal device to implement the corresponding method described in the third aspect; the transceiver may be used to support the terminal device and other network elements such as The communication between the second terminal devices, and the transceiver, may be specifically used to perform the corresponding method as described in the third aspect.

In a possible implementation manner, the memory may be a physically independent unit, or may be integrated with a processor.

In a twentieth aspect, an embodiment of the present application further provides a first terminal device, where the first terminal device includes a processor, a memory, and a transceiver, the processor and the memory are coupled, and the processor is used to run Instructions or programs in the memory, the transceiver is coupled to the processor, the transceiver is used to send direct link control information SCI to the second terminal device; and the transceiver is also used to send The second terminal device sends data, and the SCI includes scheduling information of the data; wherein the SCI is used to indicate or include partial identification information of the first terminal device, or the SCI is used to indicate or include Partial identification information of the second terminal device.

In a twenty-first aspect, an embodiment of the present application provides a second terminal device, where the second terminal device includes a processor, a memory, and a transceiver, the processor and the memory are coupled, and the processor is used to run Instructions or programs in the memory, the transceiver is coupled with the processor, and the transceiver is used to receive direct link control information SCI from the first terminal device; wherein, the SCI is used to indicate or include The identification information of the first terminal device and the identification information of the second terminal device, or the SCI is used to indicate or include the identification information of the first terminal device and part of the identification information of the second terminal device Or, the SCI is used to indicate or include part of the identification information of the first terminal device and the identification information of the second terminal device; and the transceiver is also used to receive from the first terminal device Data, the SCI includes scheduling information of the data; the processor is used to determine the identification information of the first terminal device according to the SCI, or determine the first according to the SCI and the data The identification information of the terminal device.

In a twenty-second aspect, an embodiment of the present application further provides a second terminal device, where the second terminal device includes a processor, a memory, and a transceiver, the processor and the memory are coupled, and the processor is used to Running instructions or programs in the memory, the transceiver is coupled with the processor, the transceiver is used to receive data from the first terminal device; and the transceiver is also used to A terminal device sends feedback information, the feedback information is used to feedback whether the data is correctly received, and the feedback information is also used to indicate or include identification information of the first terminal device and identification of the second terminal device At least one item of information.

In a possible implementation manner, the transceiver is specifically configured to send the feedback information to the first terminal device through a first channel; wherein, the ZC sequence used by the first channel is based on the first The identification information of the terminal device and the identification information of the second terminal device are generated.

In a twenty-third aspect, an embodiment of the present application further provides a second terminal device. The second terminal device includes a processor, a memory, and a transceiver. The memory can be used to store programs. The processor can be used to Execute the program stored in the memory, and when the program is executed, enable the second terminal device to implement the corresponding method described in the seventh aspect; the transceiver can be used to support the terminal device and other networks The communication between the first terminal device and the transceiver can be specifically used to perform the corresponding method as described in the seventh aspect.

In a twenty-fourth aspect, an embodiment of the present application further provides a second terminal device, where the second terminal device includes a processor, a memory, and a transceiver, the processor and the memory are coupled, and the processor is used to Running instructions or programs in the memory, the transceiver is coupled to the processor, and the transceiver is used to receive direct link control information SCI from the first terminal device; and the transceiver, further For receiving data from the first terminal device, the SCI includes scheduling information of the data; wherein the SCI is used to indicate or include part of identification information of the first terminal device, or, the SCI It is used to indicate or include part of identification information of the second terminal device.

In a twenty-fifth aspect, an embodiment of the present application provides a computer-readable storage medium having instructions stored therein, which when executed on a computer, causes the computer to execute the method described in the above aspects .

In a twenty-sixth aspect, an embodiment of the present application provides a computer program product including instructions, which when executed on a computer, causes the computer to execute the methods described in the foregoing aspects.

BRIEF DESCRIPTION

FIG. 1 is a schematic diagram of a transmission path provided by an embodiment of the present application;

2a is a schematic diagram of another transmission path provided by an embodiment of the present application;

2b is a schematic diagram of a transmission path provided by an embodiment of the present application;

3a is a schematic diagram of a scenario of direct object-to-object communication provided by an embodiment of the present application;

FIG. 3b is a schematic diagram of another scenario of direct object-to-object communication provided by an embodiment of the present application;

FIG. 3c is a schematic diagram of another scenario of direct object-to-object communication provided by an embodiment of the present application;

FIG. 3d is a schematic diagram of another scenario of direct object-to-object communication provided by an embodiment of the present application;

FIG. 3e is a schematic diagram of another scenario of direct object-to-object communication according to an embodiment of the present application;

FIG. 3f is a schematic diagram of another scenario of direct object-to-object communication provided by an embodiment of the present application;

FIG. 3g is a schematic diagram of yet another scenario of direct object-to-object communication provided by an embodiment of the present application;

4 is a schematic flowchart of a communication method provided by an embodiment of the present application;

5 is a schematic flowchart of another communication method provided by an embodiment of the present application;

6 is a schematic flowchart of another communication method provided by an embodiment of the present application;

7 is a schematic structural diagram of a first terminal device according to an embodiment of the present application;

8 is a schematic structural diagram of a second terminal device according to an embodiment of the present application;

9 is a schematic structural diagram of a terminal device according to an embodiment of the present application.

detailed description

The embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

The terms “first” and “second” in the description, claims, and drawings of this application are used to distinguish different objects, not to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally also includes Other steps or units inherent to these processes, methods, products or equipment.

It should be understood that in this application, "at least one (item)" refers to one or more, "multiple" refers to two or more, and "at least two (items)" refers to two or three And more than three, "and/or", used to describe the association relationship of the associated object, indicating that there can be three kinds of relationships, for example, "A and/or B" can mean: only A, only B and A And B three cases, where A, B can be singular or plural. The character "/" generally indicates that the related object is a "or" relationship. "At least one of the following" or a similar expression refers to any combination of these items, including any combination of a single item or a plurality of items. For example, at least one (a) of a, b, or c can be expressed as: a, b, c, "a and b", "a and c", "b and c", or "a and b and c" ", where a, b, c can be a single or multiple.

The scenarios in the embodiments of the present application will be specifically described below.

In a general wireless communication system, such as a long term evolution (LTE) system, when UE1 and UE2 need to perform data interaction, the transmission path may be as shown in FIG. 1, and FIG. 1 is an embodiment of the present application A schematic diagram of a transmission path between a UE and a UE is provided. As shown in FIG. 1, UE1 may first send data to evolved Node (evolved Node B, eNodeB) 1, and the eNB1 may then send the data to a core network (CN). The CN may include a serving gateway (serving gateway, SGW), PDN gateway (PDN), PGW, and mobility management entity (MME); after the CN receives the data, the CN sends the data to eNB2, and the eNB2 sends the received The data is sent to UE2.

It can be understood that the transmission path shown in FIG. 1 is only an example. In a specific implementation, UE1 and UE2 may belong to the same cell, and so on. The embodiment of the present application does not uniquely limit the transmission path shown in FIG. 1.

However, the new radio (NR) in the 5th-generation mobile communication technology (5th-generation, 5G) is a newly proposed topic in the 3rd generation partnership (3GPP) organization, which is located in the release 14. In the past 10 years, the LTE standard proposed by the 3GPP organization has been widely used all over the world and is called the 4th-generation mobile communication technology (4th-generation, 4G). For example, China Mobile, China Unicom, and China Telecom have respectively adopted 4G LTE time division duplex (TDD) and frequency division duplex (FDD) mode transmission technologies, and have provided users with a wide range of transmission technologies. High-speed and convenient mobile network service.

As the new generation of 5G technology enters the discussion stage, will the system structure and access process that have been achieved in the original 4G LTE continue to be adopted? On the one hand, since the communication system is backward compatible, new technologies developed later tend to be compatible with previously standardized technologies; on the other hand, since 4G LTE already has a large number of existing designs, if in order to achieve compatibility, it is inevitable It is necessary to sacrifice a lot of flexibility of 5G, thereby reducing performance. Therefore, in the 3GPP organization, two directions are being studied in parallel. In both directions, the technical discussion group that does not consider backward compatibility is called 5G NR.

Further, with the evolution of communication technology, the Internet of Everything is also accelerating. The 3GPP specification introduces multiple Internet of Things technologies, NB-IOT technology, eMTC technology, etc. These are Internet of Things technologies, and 3GPP also introduced Connected, end-to-end technology, such as D2D. Among them, D2D is an overview, and proximity service (proximity-based service, ProSe) is based on close-range services, which is a business name for implementing D2D technology in 3GPP. The SL (sidelink communication) communication technology is a technology for implementing ProSe services. Among them, vehicle-to-everything (Vehicle-to-everything, V2X) is also an IoT technology.

In a direct-to-thing system, as in D2D technology (also known as proximity-based (Proximity-based service, ProSe)), when UE1 and UE2 need to interact with each other, the transmission path can be as shown in Figure 2a and Figure 2a. 2b. As shown in FIG. 2a, data interaction can be performed directly between UE1 and UE2. As shown in FIG. 2b, UE1 and UE2 only exchange data through the eNB.

In other words, in sidelink, data can be directly transmitted between two UEs without sending the data to the base station first, and then forwarding through the core network, and then to the receiving UE. Therefore, the data delay can be greatly reduced, but due to the limited transmission power of the UE, sidelink is generally limited to short-distance communication. For example, for D2D technology, it can be applied to social applications based on proximity characteristics, such as data transmission between neighboring UEs such as content sharing and interactive games through D2D; it can also solve the damage to the communication infrastructure caused by natural disasters and cause communication interruption. Rescue brings obstacles. For example, in this scenario, through D2D, two neighboring UEs can still establish wireless communication; for example, D2D can also be used to push users to discount merchandise, theater previews, etc. The embodiments of the application do not limit uniquely the scenes applied by D2D.

The following will take D2D as an example to illustrate the sidelink communication scenario.

As shown in FIGS. 3a to 3g, it is a schematic diagram of a sidelink communication scenario provided by an embodiment of the present application.

The scenario shown in FIG. 3a is that both UE1 and UE2 are outside the cell coverage.

The scenario shown in FIG. 3b is that UE1 is within the cell coverage and UE2 is outside the cell coverage.

The scenario shown in FIG. 3c is that UE1 and UE2 are in the same cell and are in a public land mobile network (PLMN), such as PLMN1.

The scenario shown in FIG. 3d is that UE1 and UE2 are in a PLMN like PLMN1, but in different cells.

The scenario shown in FIG. 3e is that UE1 and UE2 are respectively in different PLMNs and different cells, and UE1 and UE2 are within the common coverage of the two cells. For example, UE1 is in PLMN1, and UE2 is in PLMN2.

The scenario shown in FIG. 3f is that UE1 and UE2 are respectively in different PLMNs and different cells, and UE1 is within the common coverage of the two cells, and UE2 is within the coverage of the serving cell.

The scenario shown in FIG. 3g is that UE1 and UE2 are respectively in different PLMNs and different cells, and UE1 and UE2 are respectively in the coverage of their respective serving cells.

Understandably, the scenario shown above can also be applied to the vehicle-to-everything, and it can also be called vehicle-to-everything (V2X), which will not be elaborated here.

Hybrid automatic repeat request (HARQ) is a technology formed by combining forward error correction (FEC) and automatic repeat-request (ARQ).

FEC adds redundant information to enable the receiver to correct some errors, thereby reducing the number of retransmissions. For errors that cannot be corrected by FEC, the receiving end requests the sending end to retransmit data through the ARQ mechanism. The receiving end uses an error detection code, usually a CRC check, to detect whether the received data packet is in error. If there is no error, the receiving end will send an acknowledgement (acknowledgement, ACK) to the sending end. After receiving the ACK, the sending end will then send the next data packet. If there is an error, the receiver will discard the packet and send a negative acknowledgement (NACK) to the sender. After receiving the NACK, the sender will resend the same data.

The ARQ mechanism introduced earlier uses the method of discarding data packets and requesting retransmission. Although these packets cannot be decoded correctly, they still contain useful information. If discarded, these useful information will be lost. By using HARQ with soft combining (HARQ with soft merging), the received error packets will be stored in a HARQ buffer and merged with the subsequent retransmission packets received, resulting in a more reliable than separate decoding Data packets (the "soft merge" process). Then decode the merged data packet, if it still fails, repeat the process of "retransmission request, then soft merge".

According to whether the retransmitted bit information is the same as the original transmission, HARQ with soft combining is divided into two types: soft combining (chase combining) and incremental redundancy (incremental redundancy). The bit information retransmitted in soft combining is the same as the original transmission; the bit information retransmitted in incremental redundancy does not need to be the same as the original transmission.

In LTE, the transmission of data and/or signaling in sidelink is based on resource pools. The so-called resource pool is a logical concept, that is, a resource pool includes multiple physical resources, any of which can be used to transmit data. In the case where the UE needs to perform data transmission, the UE needs to use one resource for transmission from the resource pool. If the UE is controlled by a network device, such as a base station, according to the instruction information of the network device, a resource is selected from the resource pool for data transmission; and if the UE independently selects a resource from the resource pool for data transmission at random. At the same time, in LTE, the sidelink technology only defines the broadcast service mode, that is, one UE sends a signal, no matter which UE can receive the signal, and whether the UE receiving the signal can successfully decode the signal.

However, in the new radio (NR) technology, sidelink transmission of unicast or multicast services needs to be introduced. Therefore, how to instruct the UE on the sending side and the receiving side becomes a mainstream issue when transmitting between UEs.

At the same time, in NR's non-sidelink transmission (ie cellular network), there has been a hybrid automatic repeat request (HARQ) feedback mechanism. The process is as follows: the base station sends downlink control information (downlink control information, DCI) to the UE; after the UE receives the DCI, it obtains the relevant parameters of the downlink data transmission from it and receives the corresponding downlink data; the UE finishes receiving the downlink data Then, send feedback information to the base station. The feedback information can be used to indicate whether the downlink data is received correctly. Among them, the DCI contains only the identification information of the UE (that is, the receiving end), but not the identification information of the network device (that is, the sending end). This is because in a cellular network, which base station is used to serve which UE is already allocated when the UE accesses the network.

However, in the sidelink scenario, UE and UE communicate with each other. A UE can send signals to multiple UEs, and can also receive signals from multiple UEs. Therefore, when transmitting between the UE and the UE, after receiving the SCI and data at the receiving end, the UE needs to send feedback information to the sending UE, how to instruct the UE at the sending end and the receiving end to be urgently resolved.

Therefore, in order to solve the above problem, an embodiment of the present application provides a communication method. Referring to FIG. 4, FIG. 4 is a schematic flowchart of a communication method provided by the embodiment of the present application. The communication method can be applied to FIGS. 3a to 3g. Any scene shown. As shown in FIG. 4, the communication method includes:

401. The first terminal device sends the direct link control information SCI to the second terminal device, and the second terminal device receives the SCI from the first terminal device.

Among them, the SCI can be used to indicate or include any of the following:

1) The identification information of the first terminal device and the identification information of the second terminal device;

2) The identification information of the first terminal device and part of the identification information of the second terminal device;

3) Part of the identification information of the first terminal device and the identification information of the second terminal device;

4) Part of the identification information of the first terminal device;

5) Part of the identification information of the second terminal device.

In other words, the SCI can be used to indicate or include any of the five methods shown above.

In the embodiment of the present application, the identification information may include an identification when the UE is set at the factory, or an identification dedicated to sidelink communication, an identification negotiated between the UEs, and identification information allocated by a network device, etc. In this embodiment of the present application, the identification information is not limited uniquely. As an example, the identification information may include a radio network temporary identity (RNTI).

Specifically, the identification information of the first terminal device may include first identification information and second identification information. That is, the first identification information may be part of the identification information of the first terminal device, and the second identification information may be the identification information of the remaining part of the first terminal device, that is, the first identification information and the second identification The information is complete identification information of the first terminal device. For example, if the identification information of the first terminal device is 16 bits, the first identification information may be the first 8 bits of the first terminal device, and the second identification information may be the last 8 bits of the first terminal device. Bits.

For example, the identification information of the first terminal device is 16 bits, the first identification information is the upper 8 bits of the first terminal device, and the second identification information is the lower 8 bits of the first terminal device; the first identification information may also be Is the upper 8 bits of the first terminal device, or the first identification information may also be the upper 4 bits of the first terminal device, and correspondingly, the second identification information may be the lower 8 bits of the first terminal device The bit, or, the lower 12 bits. It can be understood that the embodiment of the present application does not uniquely define which part of the identification information of the first terminal device is the first identification information and the second identification information.

Understandably, correspondingly, the identification information of the second terminal device can also be divided into third identification information and fourth identification information, that is, the third identification information is part of the identification information of the second terminal device, and the fourth identification information is the The remaining identification information of the second terminal device, that is, the third identification information and the fourth identification information are complete identification information of the second terminal device. For the third identification information, the fourth identification information, and the like included in the identification information of the second terminal device, reference may also be made to the foregoing description.

In the embodiment of the present application, the SCI may also include some scheduling indication information, which may be used to indicate data transmission parameters, such as data rate, modulation order, and physical resources occupied by the data. Other contents included in the SCI are not limited.

402. The first terminal device sends data to the second terminal device, and the second terminal device receives the data from the first terminal device; wherein, the SCI includes scheduling information of the data.

The information included in the SCI will be described in detail below.

Wherein, when the SCI is used to indicate or include the identification information of the first terminal device and the identification information of the second terminal device, the information included in the SCI may be as follows:

Example one

The SCI can include any of the following:

Identification information of the first terminal device and identification information of the second terminal device;

The identification information of the first terminal device and the cyclic redundancy check CRC information scrambled according to the identification information of the second terminal device;

The identification information of the second terminal device and the CRC information scrambled according to the identification information of the first terminal device;

CRC information scrambled according to the identification information of the first terminal device and the identification information of the second terminal device.

That is to say, any one of the above four items of information can be directly included in the SCI. For example, the SCI may directly include the identification information of UE1 and the identification information of UE2, or alternatively, the SCI directly includes the identification information of UE1, and the CRC information scrambled according to the identification information of UE2, or, alternatively, the SCI directly Including the identification information of UE2 and the CRC information scrambled according to the identification information of UE1, or alternatively, the SCI does not directly include the identification information of UE1 and/or the identification information of UE2, but includes scrambling according to UE1 and UE2 CRC information.

Among them, the CEC information can first be calculated based on the scheduling information or instruction information in the SCI, etc., and a preset formula, and then the calculated CRC is scrambled using the identification information of the UE (such as UE1 and/or UE2) To get the final CRC information. Among them, the final CRC information is scrambled using the UE's identification information, which can be understood as: if the UE's identification information is represented by a 24-bit bit string, and the scheduling information or instruction information is used as input, it is calculated according to a preset formula The CRC is also a 24-bit bit string, and the OR operation of the 24-bit bit string of the UE and the 24-bit bit string of the CRC is called scrambling. It can be understood that the above is only a method for calculating CRC information provided by this embodiment, and the scrambling method provided above is only an example, and the above should not be understood as a limitation to this embodiment.

For example, if the UE identity (ID) in V2X is 16-bit and the calculated CRC is also 16-bit, you can directly scramble the calculated CRC with the ID of UE1 to obtain CRC information; and Or directly scramble the calculated CRC with the ID of UE2.

For another example, if the UE ID in V2X is 8-bit and the calculated CRC is 16-bit, you can directly use the concatenated IDs of UE1 and UE2 to scramble the calculated CRC to obtain CRC information.

It can be understood that in the case of scrambling by the IDs of UE1 and UE2, this embodiment does not limit the order of UE1 and UE2. For example, the ID of UE1 can be regarded as the high 8-bit, and the ID of UE2 can be regarded as the low 8-bit; and the ID of UE1 can be regarded as the low 8-bit, and the ID of UE2 can be regarded as the high 8-bit; The IDs are split into two 4-bits, and then cascaded, etc., which is not limited in this embodiment.

It can be understood that Embodiment 1 can be applied to the case where the calculated CRC bit is the same as the bit of the UE (UE1 and/or UE2) identification information, in which case, the bit caused by the different bit can be avoided Cumbersome operations such as bit completion or bit interception improve the efficiency of obtaining CRC information.

Example two

If the identification information of the first terminal device is A, it includes first identification information A1 (the A1 is part of A) and second identification information A2 (the A2 is the remaining part of A), and the identification of the second terminal device Information B includes third identification information B1 (the B1 is the part of B) and fourth identification information B2 (the B2 is the remaining part of B);

The SCI includes the first identification information A1, the identification information B of the second terminal device, and the CRC information scrambled according to the second identification information A2;

Or, the SCI includes the third identification information B1, the identification information A of the first terminal device, and the CRC information scrambled according to the fourth identification information B2.

In other words, the SCI may directly include partial identification information of UE1 and complete identification information of UE2, and CRC information scrambled according to the remaining partial identification information of UE1. Alternatively, the SCI may also directly include partial identification information of UE2 and complete identification information of UE1, and CRC information scrambled according to the remaining partial identification information of UE2. Among them, the specific bits of the partial identification information of UE1 and the partial identification information of UE2 are not limited, for example, the bit of the second identification information and the bit of the fourth identification information can be determined according to the calculated bit of the CRC And so on, this embodiment is not limited.

For example, if the UE ID in V2X is 16-bit and the calculated CRC is 8-bit, you can directly scramble the calculated CRC based on the lower 8-bit of UE1 to obtain the CRC. Or, directly scramble the calculated CRC with the high 8-bit of UE1 to obtain CRC information. Or, directly use the low 8-bit of UE2 to scramble the calculated CRC to obtain CRC information, or directly use the high 8-bit of UE2 to scramble the calculated CRC to obtain CRC information. It is understandable that, in addition to scrambling the calculated CRC according to the above ID, the calculated CRC may also be scrambled according to the remaining IDs of UE1 or UE2. For example, if the low 4-bit of UE1 and the high 4-bit of UE1 are used to scramble the calculated CRC to obtain CRC information, etc., in this embodiment, which part of the identification information of the UE is not uniquely limited.

It can be understood that, for the specific description of the first identification information and the second identification information, as well as the third identification information and the fourth identification information, reference may be made to the foregoing embodiment, and details are not described here one by one.

The second embodiment can be applied to the case where the calculated CRC bit is smaller than the UE identification information bit. In this case, the CRC information can be obtained by scrambling part of the UE identification information.

Example three

If the identification information of the first terminal device is A, the first identification information A1 and the second identification information A2 are included, and if the identification information of the second terminal device is B, the third identification information B1 and the fourth identification information B2 are included;

The SCI includes CRC information scrambled according to the first identification information A1 and the identification information B of the second terminal device, and the SCI also includes the second identification information A2;

Or, the SCI includes CRC information scrambled according to the identification information A of the first terminal device and the third identification information B1, and the SCI also includes fourth identification information B2.

That is to say, in this embodiment, the SCI may directly include part of the identification information of UE1, and the CRC information scrambled according to the remaining part of the identification information of UE1 and the identification information of UE2. Alternatively, the SCI directly includes part of the identification information of UE2, and CRC information scrambled according to the remaining part of the identification information of UE2 and the identification information of UE1. Wherein, the bit of the first identification information and the bit of the third identification information may be determined according to the bit of the calculated CRC.

For example, if the UE ID of V2X is 10-bit and the calculated CRC is 16-bit, you can use the complete ID of UE1 and the 6-bit in the ID of UE2 to cascade to scramble the calculated CRC. It can be understood that in this embodiment, there is no limitation on which 6-bit in the ID of UE2 is specifically which 6-bit of UE2, and the order of the high and low bits of the ID of UE1 and the 6-bit in the ID of UE2.

The third embodiment can be applied to the case where the calculated bit of the CRC is larger than the bit of the identification information of the UE, in which case, scrambling can be performed by the complete identification information of one UE and part of the identification information of another UE Get CRC information.

The case in which the SCI indicates the complete identification information of the UE1 and the complete identification information of the UE2 is described in detail above. The following describes the case in which the SCI indicates the complete identification information of one UE and the partial identification information of another UE.

In this case, taking the example described in Embodiment 3 as an example, if the identification information of the first terminal device includes the first identification information and the second identification information, the identification information of the second terminal device includes the third identification Information and fourth identification information.

Then, in the case where the SCI includes CRC information scrambled according to the first identification information and the identification information of the second terminal device, the data includes the second identification information.

Or, in a case where the SCI includes CRC information scrambled according to the identification information of the first terminal device and the third identification information, the data includes the fourth identification information.

That is to say, in this case, after determining the bits of the first identification information and the third identification information according to the bits of the calculated CRC, the remaining second identification information and the fourth identification information may be included in the data .

The following describes the situation where the SCI indicates part of the identification information of the UE.

The identification information of the first terminal device includes the first identification information and the second identification information, and the identification information of the second terminal device includes the third identification information and the fourth identification information;

The SCI includes CRC information scrambled according to the first identification information, and the data includes second identification information and identification information of the second terminal device;

Or, the SCI includes CRC information scrambled according to the third identification information, and the data includes identification information of the first terminal device and the fourth identification information.

That is to say, in this case, after the first identification information and the third identification information are determined according to the bits of the calculated CRC, the second identification information and the complete identification information of UE2 may be included in the data, and the fourth identification The information and the complete identification information of UE1 may also be included in the data.

It can be understood that the above-described embodiments have different emphasis. For an implementation manner that is not described in detail in one embodiment, reference may be made to implementation manners in other embodiments, and details are not described here one by one.

403. The second terminal device determines the identification information of the first terminal device according to the SCI, or the second terminal device determines the identification information of the first terminal device according to the SCI and the data.

For example, the UE ID of V2X is 16-bit, and the calculated CRC is also 16-bit. You can directly use the UE2 ID to scramble the calculated CRC. If the descrambling of UE2 is successful, the ID of UE1 included in the SCI can be further read, so as to obtain which UE is on the sending end. In this example, when UE2 descrambles the SCI, it can directly determine whether it is the data scheduled for itself through the ID of UE2, which effectively saves the time for UE2 to descramble the SCI and improves the efficiency of scrambling.

For another example, the UE ID of V2X is 16-bit, and the calculated CRC is also 16-bit. You can directly use the UE1 ID to scramble the calculated CRC. Understandably, since the scrambling is performed by the UE1 ID, when UE2 receives the SCI, it also needs to use the UE1 ID for descrambling. So how does UE2 know which UE ID to use for descrambling? In this case, if unicast transmission is required between the two UEs, it means that the two UEs have established a high-level connection (session) before the transmission. Then, when descrambling the SCI, UE2 may use the IDs of other UEs with which it has established a session to descramble separately. If the descrambling is successful, the ID of UE1 can be known, so that the ID of UE2 included in the SCI can be further read to determine whether the data was sent to itself.

For another example, the UE ID of V2X is 8-bit and the CRC check is 16-bit. Two UE IDs can be directly used for cascading to scramble the calculated CRC. When UE2 descrambles the SCI, it can use the IDs of other UEs with which it has established a session to combine its own IDs for descrambling respectively, so as to obtain the ID of UE1.

For another example, the UE ID of V2X is 10-bit, and the CRC check is 16-bit. You can use the 6-bit of UE2 ID and UE1 ID to cascade to scramble the calculated CRC. The remaining 4-bits of UE1 ID can be included in the SCI. When descrambling the SCI, UE2 may use the IDs of other UEs with which it has established a session to combine its own IDs for descrambling. If the descrambling is successful, the remaining part of the UE1 ID in the SCI is further read to determine which UE1 is.

In the case where the data contains the identification information of the UE, after the descrambling of UE2 succeeds, after receiving the data, the complete identification information can be obtained according to the identification information in the SCI and the remaining identification information in the data.

Referring to FIG. 5, FIG. 5 is a schematic flowchart of another communication method provided by an embodiment of the present application, and the communication method may be applied to any scenario shown in FIGS. 3a to 3g. As shown in FIG. 5, the communication method includes:

501. A first terminal device sends data to a second terminal device, and the second terminal device receives data from the first terminal device.

502. The second terminal device sends feedback information to the first terminal device, and the first terminal device receives the feedback information from the second terminal device.

Wherein, the feedback information is used to feed back whether the data is correctly received, and the feedback information is also used to indicate or include at least one of the identification information of the first terminal device and the identification information of the second terminal device.

In the embodiment of the present application, when the feedback information is used to indicate or include the identification information of the first terminal device, the first terminal device may be based on the time-frequency resource when the first terminal device sends data and when the feedback information is received Time-frequency resources to obtain which second terminal device is. Understandably, in this case, the time-frequency resource may be preset by the network device, so that the first terminal device can effectively obtain the identification information of the second terminal device. When the feedback information is used to indicate or include identification information of the second terminal device, the first terminal device may determine whether the feedback information is sent to itself according to whether data has been sent to the second terminal device.

Where the feedback information indicates the identification information of the first terminal device and the identification information of the second terminal device, the information included in the feedback information may be as follows:

Example one

The feedback information includes any of the following:

Identification information of the second terminal device, and CRC information scrambled according to the identification information of the first terminal device;

The feedback information may directly include any one of the above four items of information. For example, the feedback information may directly include the identification information of UE1 and the identification information of UE2, or alternatively, the feedback information directly includes the identification information of UE1, and the CRC information scrambled according to the identification information of UE2, or, the feedback The information directly includes the identification information of UE2 and the CRC information scrambled according to the identification information of UE1, or the feedback information does not directly include the identification information of UE1 and/or the identification information of UE2, but includes the information based on UE1 and CRC information scrambled by UE2.

Example two

The feedback information includes the first identification information, the identification information of the second terminal device, and the CRC information scrambled according to the second identification information;

Or, the feedback information includes identification information of the first terminal device, the third identification information, and CRC information scrambled according to the fourth identification information.

In other words, the feedback information may directly include partial identification information of UE1 and complete identification information of UE2, and CRC information scrambled according to the remaining partial identification information of UE1. Alternatively, the feedback information may directly include partial identification information of UE2 and complete identification information of UE1, and CRC information scrambled according to the remaining partial identification information of UE2. Among them, the specific bits of the partial identification information of UE1 and the partial identification information of UE2 are not limited, for example, the bit of the second identification information and the bit of the fourth identification information can be determined according to the calculated bit of the CRC And so on, this embodiment is not limited.

Example three

The feedback information includes the first identification information and CRC information scrambled according to the second identification information and the identification information of the second terminal device;

Or, the feedback information includes the third identification information, and the CRC information scrambled according to the identification information of the first terminal device and the fourth identification information.

That is to say, in this embodiment, the feedback information may directly include part of the identification information of UE1, and CRC information scrambled according to the remaining part of the identification information of UE1 and the identification information of UE2. Alternatively, the feedback information directly includes partial identification information of UE2, and CRC information scrambled according to the remaining partial identification information of UE2 and the identification information of UE1. Wherein, the bit of the first identification information and the bit of the third identification information may be determined according to the bit of the calculated CRC.

It can be understood that, for the specific description of Embodiments 1 to 3 shown in FIG. 5, reference may be made to the descriptions of Embodiments 1 to 3 in FIG. 4, and details are not repeated here.

Understandably, in the NR, the physical uplink control channel (physical uplink control channel, PUCCH) is divided into 5 formats. Different formats are either different in time domain length (1 to 2 symbols, or 4 to 14 symbols), or the number of information bits carried is different (less than or equal to 2 bits, or greater than 2 bits). Wherein, when the number of information bits carried by the PUCCH is less than or equal to 2 bits, the PUCCH is sent using the ZC sequence (or QPSK sequence similar to ZC). For example, there are 4 available sequences, which can represent the four cases 00/01/10/11, which is equivalent to carrying 2 bits of information. When the number of information bits carried on the PUCCH is greater than 2 bits, the information bits are processed through CRC check, channel coding, scrambling, and modulation before being mapped onto physical resources.

Based on this, in the direct connection of objects such as D2D and V2X, the second terminal device sends feedback information to the first terminal device, and the first terminal device receives feedback information from the second terminal device, including:

The second terminal device sends the feedback information to the first terminal device through the first channel, and the first terminal device receives the feedback information sent by the second terminal device through the first channel; wherein, the first channel uses The ZC sequence is generated based on the identification information of the first terminal device and the identification information of the second terminal device.

In this embodiment, the first channel may be understood as a channel that sends feedback information. For example, the first channel may also be referred to as a feedback channel, or another name, etc. In this embodiment, the name of the first channel is not limited. Where the feedback information is less than or equal to 2 bits, the first channel can send feedback in the form of ZC (zadoff-chu) sequence (or ZC-like quadrature phase shift keying (QPSK) sequence) information. In this case, the ZC sequence used by the first channel may be generated according to the identification information of UE1 and the identification information of UE2.

Further, when using the ZC sequence for transmission, it is also necessary to confirm what the ZC sequence is and what is the orthogonal mask when the orthogonal mask is used. Therefore, as shown below, this embodiment also provides a method to determine the ZC sequence.

For example, UE1 ID and UE2 ID are 4-bit. When the orthogonal mask is not used, two IDs can be used together to select one of 256 selectable ZC sequences as the ZC sequence to be used.

In another example, the ID of UE1 and the ID of UE2 are 4-bit. When the orthogonal mask is used, two IDs can be used to select one of 128 optional ZC sequences as the ZC sequence to be used, and at the same time, one of the remaining two optional orthogonal mask sequences can be used as the used Orthogonal mask sequence.

It is understandable that the root sequence and the orthogonal mask sequence of the above ZC sequence are only an example. In a specific implementation, the orthogonal mask sequence to be used may be selected from four optional orthogonal mask sequences first, and then The ZC sequence to be used from the remaining 64 optional ZC sequences and so on are not limited in the embodiments of the present application.

In another example, the ID of UE1 and the ID of UE2 are 4-bit. Among them, the time-frequency position of the physical resource used by the feedback information is determined according to the first 2-bit of the ID of UE1 and the first 2-bit of the ID of UE2. When the orthogonal mask is not used, two optional ZC sequences corresponding to the remaining partial IDs of UE1 and UE2 may be used. For example, one of the 16 optional ZC sequences may be selected as the ZC sequence to be used.

In another example, the ID of UE1 and the ID of UE2 are 4-bit. Among them, the time-frequency position of the physical resource used by the feedback information is determined according to the first 2-bit of the ID of UE1 and the first 2-bit of the ID of UE2. When using orthogonal masks, you can use the two optional ZC sequences corresponding to the remaining partial IDs of UE1 and UE2. For example, one of the eight optional ZC sequences can be selected as the ZC sequence to be used. Select one of the cross mask sequences as the orthogonal mask sequence to use.

In another example, the ID of UE1 and the ID of UE2 are 4-bit. Among them, the time-frequency position of the physical resource used by the feedback information is determined according to the UE1 ID. When using orthogonal masks, you can use UE2 ID to select one ZC sequence from 8 selectable ZC sequences as the ZC sequence to use, and at the same time select one used orthogonal mask sequence from the 2 selectable orthogonal mask sequences .

It can be understood that the above-mentioned bits are only an example. In a specific implementation, the UE may include more bits, and thus there may be more optional sequences, so that there are more optional sequences from the optional sequence. One sequence is selected as the root sequence of the ZC sequence, and the remaining sequence is selected as the orthogonal mask sequence.

That is to say, the ZC sequence in the embodiment of the present application may be generated based on the UE1 ID and/or UE2 ID, and the orthogonal mask sequence may also be generated from the UE1 ID and/or IE2ID, and there is no unique limitation on the specific method.

503. The first terminal device determines the identification information of the second terminal device according to the feedback information.

Implementing the embodiments of the present application, indicating the identification information of the first terminal device and the identification information of the second terminal device through the feedback information may enable the first terminal device to obtain which UE sends the feedback information according to the feedback information, so that Effectively improve the efficiency of information exchange, improve the efficiency of direct transmission of objects.

Further, according to the communication methods shown in FIGS. 4 and 5, refer to FIG. 6, which is a schematic flowchart of yet another communication method provided by an embodiment of the present application. The communication method can also be applied to FIGS. 3a to 3g. Any scene shown. As shown in FIG. 6, the communication method includes:

601. The first terminal device sends the direct link control information SCI to the second terminal device, and the second terminal device receives the SCI from the first terminal device.

602. The first terminal device sends data to the second terminal device, and the second terminal device receives data from the first terminal device; wherein, the SCI includes scheduling information of the data.

603. The second terminal device determines the identification information of the first terminal device according to the SCI, or the second terminal device determines the identification information of the first terminal device according to the SCI and the data.

604. The second terminal device sends feedback information to the first terminal device, and the first terminal device receives the feedback information from the second terminal device.

605. The first terminal device determines the identification information of the second terminal device according to the feedback information.

It can be understood that, for the specific implementation manner of the communication method shown in FIG. 6, reference may be made to the specific implementation manners shown in FIG. 4 and FIG. 5, and details are not repeated here.

The implementation of the embodiments of the present application can effectively improve the efficiency of information exchange at both ends of receiving and sending, and improve the efficiency of direct connection transmission of objects.

The above describes the method of the embodiment of the present application in detail, and the terminal device of the embodiment of the present application is provided below.

Referring to FIG. 7, FIG. 7 is a schematic structural diagram of a first terminal device according to an embodiment of the present application. The first terminal device may include:

The sending unit 701 is configured to send the direct link control information SCI to the second terminal device; wherein, the SCI is used to indicate or include the identification information of the first terminal device and the identification information of the second terminal device, or, the The SCI is used to indicate or include the identification information of the first terminal device and part of the identification information of the second terminal device, or the SCI is used to indicate or include the partial identification information of the first terminal device and the part of the second terminal device Identification information;

The sending unit 701 is further configured to send data to the second terminal device, and the SCI includes scheduling information of the data.

Optionally, as shown in FIG. 7, the first terminal device further includes:

The receiving unit 702 is configured to receive feedback information from the second terminal device; wherein, the feedback information is used to feedback whether the data is correctly received, and the feedback information is also used to indicate or include identification information of the first terminal device and At least one item of identification information of the second terminal device;

The determining unit 703 is configured to determine the identification information of the second terminal device according to the feedback information.

For the specific implementation manner of the information contained in the SCI and the specific implementation manner of the information contained in the feedback information, please refer to the methods shown in FIG. 4 to FIG. 6, which will not be elaborated here.

Implementing the embodiments of the present application, indicating the identification information of the first terminal device and the identification information of the second terminal device through the SCI and the feedback information, etc., may enable the second terminal device to obtain which two UEs the transceiver is based on the SCI, and It can enable the first terminal device to obtain which two UEs are the receiving and sending terminals according to the feedback information, thereby effectively improving the efficiency of information interaction and improving the efficiency of the direct connection transmission of objects.

Referring to FIG. 8, FIG. 8 is a schematic structural diagram of a second terminal device according to an embodiment of the present application. The second terminal device may include:

The receiving unit 801 is configured to receive direct link control information SCI from the first terminal device; wherein, the SCI is used to indicate or include identification information of the first terminal device and identification information of the second terminal device, or, The SCI is used to indicate or include identification information of the first terminal device and partial identification information of the second terminal device, or the SCI is used to indicate or include partial identification information of the first terminal device and the second terminal device Identification information;

The receiving unit 801 is also used to receive data from the first terminal device, and the SCI includes scheduling information of the data;

The determining unit 802 is configured to determine the identification information of the first terminal device according to the SCI, or the second terminal device determines the identification information of the first terminal device according to the SCI and the data.

Optionally, as shown in FIG. 8, the second terminal device further includes:

The sending unit 803 is used to send feedback information to the first terminal device, the feedback information is used to feedback whether the data is correctly received, and the feedback information is also used to indicate the identification information of the first terminal device and the second terminal device At least one item of identification information.

It can be understood that, for specific implementation manners of the first terminal device and the second terminal device shown in FIG. 7 and FIG. 8, reference may be made to the implementation modes shown in FIG. 4 to FIG. 6, and details are not described here one by one.

9 is a schematic structural diagram of a terminal device 900 provided by an embodiment of the present application. The terminal device may perform the operation of the first terminal device in the method shown in FIGS. 4 to 6, or the terminal device may also perform the operation of the second terminal device in the method shown in FIGS. 4 to 6. . Alternatively, the terminal device may also perform the operation of the first terminal device shown in FIG. 7, or the terminal device may also perform the operation of the second terminal device shown in FIG. 8.

For ease of explanation, FIG. 9 shows only the main components of the terminal device. As shown in FIG. 9, the terminal device 900 includes a processor, a memory, a radio frequency link, an antenna, and input and output devices. The processor is mainly used to process the communication protocol and communication data, and to control the entire terminal device, execute a software program, and process the data of the software program, for example, to support the terminal device to execute the processes described in FIGS. 4 to 6. The memory is mainly used to store software programs and data. The radio frequency link is mainly used for the conversion of the baseband signal and the radio frequency signal and the processing of the radio frequency signal. The antenna is mainly used to send and receive radio frequency signals in the form of electromagnetic waves. The terminal device 900 may further include input and output devices, such as a touch screen, a display screen, and a keyboard, which are mainly used to receive data input by the user and output data to the user. It should be noted that some types of terminal devices may not have input/output devices.

After the terminal device is turned on, the processor can read the software program in the storage unit, interpret and execute the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor performs baseband processing on the data to be sent, and outputs a baseband signal to the radio frequency link. The radio frequency link processes the baseband signal after radio frequency processing, and then sends the radio frequency signal to the outside in the form of electromagnetic waves through the antenna. When data is sent to the terminal device, the radio frequency link receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data .

Those skilled in the art can understand that, for ease of explanation, FIG. 9 only shows one memory and processor. In an actual terminal device, there may be multiple processors and memories. The memory may also be referred to as a storage medium or a storage device, etc. This embodiment of the present application does not limit this.

As an optional implementation, the processor may include a baseband processor and a central processing unit (CPU). The baseband processor is mainly used to process communication protocols and communication data, and the CPU is mainly used to process the entire terminal. The device controls, executes the software program, and processes the data of the software program. Optionally, the processor may also be a network processor (NP) or a combination of CPU and NP. The processor may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The above PLD may be a complex programmable logic device (complex programmable logic device, CPLD), a field programmable logic gate array (field-programmable gate array, FPGA), a general array logic (generic array logic, GAL), or any combination thereof. The memory may include volatile memory (volatile memory), such as random-access memory (RAM); the memory may also include non-volatile memory (non-volatile memory), such as flash memory (flash memory) , Hard disk drive (HDD) or solid-state drive (SSD); memory can also include a combination of the above types of memory.

Exemplarily, in the embodiments of the application, the antenna and the radio frequency link with the transceiver function may be regarded as the transceiver unit 901 of the terminal device 900, and the processor with the processing function may be regarded as the processing unit 902 of the terminal device 900.

As shown in FIG. 9, the terminal device 900 may include a transceiving unit 901 and a processing unit 902. The transceiver unit may also be called a transceiver, a transceiver, a transceiver device, or the like. Optionally, the device used to implement the receiving function in the transceiver unit 901 may be regarded as a receiving unit, and the device used to implement the sending function in the transceiver unit 901 may be regarded as a sending unit, that is, the transceiver unit 901 includes a receiving unit and a sending unit. Exemplarily, the receiving unit may also be referred to as a receiver, receiver, receiving circuit, etc., and the transmitting unit may be referred to as a transmitter, transmitter, or transmitting circuit, etc.

In some embodiments, the transceiver unit 901 and the processing unit 902 may be integrated into one device, or may be separated into different devices. In addition, the processor and the memory may also be integrated into one device, or separated into different devices. For example, in one embodiment, the transceiver unit 901 may be used to perform the methods shown in step 401 and step 402 shown in FIG. 4. For another example, in one embodiment, the transceiver unit 901 may also be used to perform the methods shown in step 501 and step 502 shown in FIG. 5.

For another example, in one embodiment, the processing unit 902 may be used to execute the control of the transceiver unit 901 to perform the method shown in step 401 and step 402 shown in FIG. 4, and the method shown in step 403 shown in FIG. 4, and The processing unit 902 can also be used to control the transceiver unit 901 to execute the method shown in step 501 and step 502 shown in FIG. 5, and the processing unit 902 can also be used to execute the method shown in step 503 shown in FIG.

For example, the processing unit 902 may be used to control the transceiving unit 901 to send data and feedback information to the second terminal device, etc., which will not be elaborated here.

For another example, in one embodiment, the transceiver unit 901 may also be used to execute the method shown in the sending unit 701 and the receiving unit 702. Alternatively, it may be used to execute the method shown in the receiving unit 801 and the sending unit 803. It can be understood that, if the transceiver unit can separately execute the method shown in the sending unit 701, the transceiver unit can also perform the method shown in the sending unit 701 under the control of the processor. It is not limited how to execute the corresponding method.

For another example, in one embodiment, the processing unit 902 may also be used to execute the method shown by the determination unit 703, or used to execute the method shown by the determination unit 802.

For another example, in one embodiment, the processing unit 902 may also be used to control the transceiver unit 901 to execute the methods shown in the sending unit 701 and the receiving unit 702, and the receiving unit 801 and the sending unit 803.

It can be understood that, for the implementation manner of the terminal device in the embodiments of the present application, reference may be made to the foregoing embodiments, and details are not described here.

A person of ordinary skill in the art may understand that all or part of the process in the method of the above embodiment may be implemented by a computer program instructing relevant hardware. The program may be stored in a computer-readable storage medium, and when the program is executed , May include the processes of the foregoing method embodiments. The aforementioned storage media include: read-only memory (read-only memory, ROM) or random access memory (random access memory, RAM), magnetic disks or optical disks and other media that can store program codes.

Claims

A communication method, characterized in that it includes:

The first terminal device sends the direct link control information SCI to the second terminal device; wherein the SCI is used to indicate or include identification information of the first terminal device and identification information of the second terminal device, or, The SCI is used to indicate or include identification information of the first terminal device and partial identification information of the second terminal device, or the SCI is used to indicate or include partial identification information of the first terminal device and Identification information of the second terminal device;

The first terminal device sends data to the second terminal device, and the SCI includes scheduling information of the data.
The method according to claim 1, wherein the SCI includes any one of the following:

The identification information of the first terminal device and the identification information of the second terminal device;

The identification information of the first terminal device and the cyclic redundancy check CRC information scrambled according to the identification information of the second terminal device;

The identification information of the second terminal device and the CRC information scrambled according to the identification information of the first terminal device;

CRC information scrambled according to the identification information of the first terminal device and the identification information of the second terminal device.
The method according to claim 1, wherein the identification information of the first terminal device includes first identification information and second identification information, and the identification information of the second terminal device includes third identification information and fourth Identification information;

The SCI includes the first identification information, the identification information of the second terminal device, and the CRC information scrambled according to the second identification information;

Alternatively, the SCI includes the third identification information, the identification information of the first terminal device, and the CRC information scrambled according to the fourth identification information.
The method according to claim 1, wherein the identification information of the first terminal device includes first identification information and second identification information, and the identification information of the second terminal device includes third identification information and fourth Identification information;

The SCI includes CRC information scrambled according to the first identification information and the identification information of the second terminal device;

Alternatively, the SCI includes CRC information scrambled according to the identification information of the first terminal device and the third identification information.
The method according to claim 4, in the case where the SCI includes CRC information scrambled according to the first identification information and the identification information of the second terminal device,

The SCI also includes the second identification information, or the data includes the second identification information.
The method according to claim 4, wherein the SCI includes CRC information scrambled according to the identification information of the first terminal device and the third identification information,

The SCI also includes the fourth identification information, or the data includes the fourth identification information.
The method of claim 1, further comprising:

The first terminal device receives feedback information from the second terminal device;

The first terminal device determines the identification information of the second terminal device according to the feedback information; wherein, the feedback information is used to feedback whether the data is correctly received, and the feedback information is also used to indicate or include the At least one of the identification information of the first terminal device and the identification information of the second terminal device.
The method according to claim 7, wherein the feedback information includes any one of the following:

The identification information of the first terminal device and the identification information of the second terminal device;

Identification information of the first terminal device, and cyclic redundancy check CRC information scrambled according to the identification information of the second terminal device;

Identification information of the second terminal device, and CRC information scrambled according to the identification information of the first terminal device;

CRC information scrambled according to the identification information of the first terminal device and the identification information of the second terminal device.
The method according to claim 7, wherein the identification information of the first terminal device includes first identification information and second identification information, and the identification information of the second terminal device includes third identification information and fourth Identification information;

The feedback information includes the first identification information, the identification information of the second terminal device, and the CRC information scrambled according to the second identification information;

Alternatively, the feedback information includes identification information of the first terminal device, the third identification information, and CRC information scrambled according to the fourth identification information.
The method according to claim 7, wherein the identification information of the first terminal device includes first identification information and second identification information, and the identification information of the second terminal device includes third identification information and fourth Identification information;

The feedback information includes the first identification information and CRC information scrambled according to the second identification information and the identification information of the second terminal device;

Alternatively, the feedback information includes the third identification information, and CRC information scrambled according to the identification information of the first terminal device and the fourth identification information.
The method according to claim 7, wherein the first terminal device receiving feedback information from the second terminal device comprises:

The first terminal device receives the feedback information sent by the second terminal device through the first channel; wherein, the ZC sequence used by the first channel is based on the identification information of the first terminal device and the second The identification information of the terminal device is generated.
A communication method, characterized in that it includes:

The first terminal device sends data to the second terminal device;

The first terminal device receives feedback information from the second terminal device; wherein, the feedback information is used to feedback whether the data is received correctly, and the feedback information is also used to indicate or include the first terminal At least one of the identification information of the device and the identification information of the second terminal device;

The first terminal device determines the identification information of the second terminal device according to the feedback information.
The method according to claim 12, wherein the feedback information includes any one of the following:

The identification information of the first terminal device and the identification information of the second terminal device;

Identification information of the first terminal device, and cyclic redundancy check CRC information scrambled according to the identification information of the second terminal device;

Identification information of the second terminal device, and CRC information scrambled according to the identification information of the first terminal device;

CRC information scrambled according to the identification information of the first terminal device and the identification information of the second terminal device.
The method according to claim 12, wherein the identification information of the first terminal device includes first identification information and second identification information, and the identification information of the second terminal device includes third identification information and fourth Identification information;

The feedback information includes the first identification information, the identification information of the second terminal device, and the CRC information scrambled according to the second identification information;

Alternatively, the feedback information includes identification information of the first terminal device, the third identification information, and CRC information scrambled according to the fourth identification information.
The method according to claim 12, wherein the identification information of the first terminal device includes first identification information and second identification information, and the identification information of the second terminal device includes third identification information and fourth Identification information;

The feedback information includes the first identification information and CRC information scrambled according to the second identification information and the identification information of the second terminal device;

Alternatively, the feedback information includes the third identification information, and CRC information scrambled according to the identification information of the first terminal device and the fourth identification information.
The method according to claim 12, wherein the first terminal device receiving feedback information from the second terminal device comprises:

The first terminal device receives the feedback information sent by the second terminal device through the first channel; wherein, the ZC sequence used by the first channel is based on the identification information of the first terminal device and the second The identification information of the terminal device is generated.
A communication method, characterized in that it includes:

The first terminal device sends the direct link control information SCI to the second terminal device;

The first terminal device sends data to the second terminal device, and the SCI includes scheduling information of the data; wherein the SCI is used to indicate or include partial identification information of the first terminal device, or, The SCI is used to indicate or include part of identification information of the second terminal device.
The method according to claim 17, wherein the identification information of the first terminal device includes first identification information and second identification information, and the identification information of the second terminal device includes third identification information and fourth Identification information;

The SCI includes CRC information scrambled according to the first identification information, and the data includes the second identification information and identification information of the second terminal device;

Alternatively, the SCI includes CRC information scrambled according to the third identification information, and the data includes identification information of the first terminal device and the fourth identification information.
A communication method, characterized in that it includes:

The second terminal device receives direct link control information SCI from the first terminal device; wherein the SCI is used to indicate or include identification information of the first terminal device and identification information of the second terminal device, or , The SCI is used to indicate or include identification information of the first terminal device and partial identification information of the second terminal device, or the SCI is used to indicate or include partial identification information of the first terminal device And identification information of the second terminal device;

The second terminal device receives data from the first terminal device, and the SCI includes scheduling information of the data;

The second terminal device determines the identification information of the first terminal device according to the SCI, or the second terminal device determines the identification information of the first terminal device according to the SCI and the data.
The method according to claim 19, wherein the SCI includes any one of the following:

The identification information of the first terminal device and the identification information of the second terminal device;

The identification information of the first terminal device and the cyclic redundancy check CRC information scrambled according to the identification information of the second terminal device;

The identification information of the second terminal device and the CRC information scrambled according to the identification information of the first terminal device;

CRC information scrambled according to the identification information of the first terminal device and the identification information of the second terminal device.
The method according to claim 19, wherein the identification information of the first terminal device includes first identification information and second identification information, and the identification information of the second terminal device includes third identification information and fourth Identification information;

The SCI includes the first identification information, the identification information of the second terminal device, and the CRC information scrambled according to the second identification information;

Alternatively, the SCI includes the third identification information, the identification information of the first terminal device, and the CRC information scrambled according to the fourth identification information.
The method according to claim 19, wherein the identification information of the first terminal device includes first identification information and second identification information, and the identification information of the second terminal device includes third identification information and fourth Identification information;

The SCI includes the CRC information scrambled according to the first identification information and the identification information of the second terminal device; or, the SCI includes the identification information and the first The CRC information obtained by scrambling the three identification information.
The method according to claim 19, wherein the SCI includes CRC information scrambled according to the first identification information and the identification information of the second terminal device,

The SCI also includes the second identification information; or, the data includes the second identification information.
The method according to claim 19, wherein the SCI includes CRC information scrambled according to the identification information of the first terminal device and the third identification information,

The SCI also includes the fourth identification information; or, the data includes the fourth identification information.
The method according to claim 19, further comprising:

The second terminal device sends feedback information to the first terminal device, the feedback information is used to feedback whether the data is received correctly, and the feedback information is also used to indicate the identification information of the first terminal device and At least one item of identification information of the second terminal device.
The method according to claim 25, wherein the feedback information includes any one of the following:

The identification information of the first terminal device and the identification information of the second terminal device;

Identification information of the first terminal device, and cyclic redundancy check CRC information scrambled according to the identification information of the second terminal device;

Identification information of the second terminal device, and CRC information scrambled according to the identification information of the first terminal device;

CRC information scrambled according to the identification information of the first terminal device and the identification information of the second terminal device.
The method according to claim 25, wherein the identification information of the first terminal device includes first identification information and second identification information, and the identification information of the second terminal device includes third identification information and fourth Identification information;

The feedback information includes the first identification information, the identification information of the second terminal device, and the CRC information scrambled according to the second identification information;

Alternatively, the feedback information includes identification information of the first terminal device, the third identification information, and CRC information scrambled according to the fourth identification information.
The method according to claim 25, wherein the identification information of the first terminal device includes first identification information and second identification information, and the identification information of the second terminal device includes third identification information and fourth Identification information;

The feedback information includes the first identification information and CRC information scrambled according to the second identification information and the identification information of the second terminal device;

Alternatively, the feedback information includes the third identification information, and CRC information scrambled according to the identification information of the first terminal device and the fourth identification information.
The method according to claim 25, wherein the second terminal device sending feedback information to the first terminal device includes:

The second terminal device sends the feedback information to the first terminal device through the first channel; wherein, the ZC sequence used by the first channel is based on the identification information of the first terminal device and the second terminal The identification information of the device is generated.
A communication method, characterized in that it includes:

The second terminal device receives data from the first terminal device;

The second terminal device sends feedback information to the first terminal device, the feedback information is used to feed back whether the data is received correctly, and the feedback information is also used to indicate or include an identifier of the first terminal device At least one item of information and identification information of the second terminal device.
The method according to claim 30, wherein the feedback information includes any one of the following:

The identification information of the first terminal device and the identification information of the second terminal device;

Identification information of the first terminal device, and cyclic redundancy check CRC information scrambled according to the identification information of the second terminal device;

Identification information of the second terminal device, and CRC information scrambled according to the identification information of the first terminal device;

CRC information scrambled according to the identification information of the first terminal device and the identification information of the second terminal device.
The method according to claim 30, wherein the identification information of the first terminal device includes first identification information and second identification information, and the identification information of the second terminal device includes third identification information and fourth Identification information;

The feedback information includes the first identification information, the identification information of the second terminal device, and the CRC information scrambled according to the second identification information;

Alternatively, the feedback information includes identification information of the first terminal device, the third identification information, and CRC information scrambled according to the fourth identification information.
The method according to claim 30, wherein the identification information of the first terminal device includes first identification information and second identification information, and the identification information of the second terminal device includes third identification information and fourth Identification information;

The feedback information includes the first identification information and CRC information scrambled according to the second identification information and the identification information of the second terminal device;

Alternatively, the feedback information includes the third identification information, and CRC information scrambled according to the identification information of the first terminal device and the fourth identification information.
The method according to claim 30, wherein the second terminal device sending feedback information to the first terminal device comprises:

The second terminal device sends the feedback information to the first terminal device through the first channel; wherein, the ZC sequence used by the first channel is based on the identification information of the first terminal device and the second terminal The identification information of the device is generated.
A communication method, characterized in that it includes:

The second terminal device receives the direct link control information SCI from the first terminal device;

The second terminal device receives data from the first terminal device, and the SCI includes scheduling information of the data; wherein the SCI is used to indicate or include partial identification information of the first terminal device, or , The SCI is used to indicate or include part of the identification information of the second terminal device.
The method according to claim 35, wherein the identification information of the first terminal device includes first identification information and second identification information, and the identification information of the second terminal device includes third identification information and fourth Identification information;

The SCI includes CRC information scrambled according to the first identification information, and the data includes the second identification information and identification information of the second terminal device;

Alternatively, the SCI includes CRC information scrambled according to the third identification information, and the data includes identification information of the first terminal device and the fourth identification information.
A first terminal device is characterized by comprising:

A sending unit, configured to send direct link control information SCI to a second terminal device; wherein, the SCI is used to indicate or include identification information of the first terminal device and identification information of the second terminal device, or , The SCI is used to indicate or include identification information of the first terminal device and partial identification information of the second terminal device, or the SCI is used to indicate or include partial identification information of the first terminal device And identification information of the second terminal device;

The sending unit is further configured to send data to the second terminal device, and the SCI includes scheduling information of the data.
The first terminal device according to claim 37, wherein the SCI includes any one of the following:

The identification information of the first terminal device and the identification information of the second terminal device;

The identification information of the first terminal device and the cyclic redundancy check CRC information scrambled according to the identification information of the second terminal device;

The identification information of the second terminal device and the CRC information scrambled according to the identification information of the first terminal device;

CRC information scrambled according to the identification information of the first terminal device and the identification information of the second terminal device.
The first terminal device according to claim 37, wherein the identification information of the first terminal device includes first identification information and second identification information, and the identification information of the second terminal device includes third identification information And fourth identification information;

The SCI includes the first identification information, the identification information of the second terminal device, and the CRC information scrambled according to the second identification information;

Alternatively, the SCI includes the third identification information, the identification information of the first terminal device, and the CRC information scrambled according to the fourth identification information.
The first terminal device according to claim 37, characterized in that

The identification information of the first terminal device includes first identification information and second identification information, and the identification information of the second terminal device includes third identification information and fourth identification information;

The SCI includes CRC information scrambled according to the first identification information and the identification information of the second terminal device;

Alternatively, the SCI includes CRC information scrambled according to the identification information of the first terminal device and the third identification information.
The first terminal device according to claim 37, wherein the SCI includes CRC information scrambled according to the first identification information and the identification information of the second terminal device,

The SCI also includes the second identification information; or, the data includes the second identification information.
The first terminal device according to claim 37, wherein the SCI includes CRC information scrambled according to the identification information of the first terminal device and the third identification information,

The SCI also includes the fourth identification information; or, the data includes the fourth identification information.
The first terminal device according to claim 37, further comprising:

A receiving unit, configured to receive feedback information from the second terminal device;

A determining unit, configured to determine the identification information of the second terminal device according to the feedback information; wherein, the feedback information is used to feed back whether the data is correctly received, and the feedback information is also used to indicate or include the At least one item of identification information of the first terminal device and identification information of the second terminal device.
A first terminal device is characterized by comprising:

A sending unit, configured to send data to the second terminal device;

A receiving unit, configured to receive feedback information from the second terminal device; wherein, the feedback information is used to feedback whether the data is correctly received, and the feedback information is also used to indicate or include the first terminal device At least one of the identification information of the second terminal device and the identification information of the second terminal device; a determining unit configured to determine the identification information of the second terminal device based on the feedback information.
The first terminal device according to claim 44, wherein the feedback information includes any one of the following:

The identification information of the first terminal device and the identification information of the second terminal device; the identification information of the first terminal device, and the cyclic redundancy check CRC information scrambled according to the identification information of the second terminal device ;

Identification information of the second terminal device, and CRC information scrambled according to the identification information of the first terminal device;

CRC information scrambled according to the identification information of the first terminal device and the identification information of the second terminal device.
The first terminal device according to claim 44, wherein the identification information of the first terminal device includes first identification information and second identification information, and the identification information of the second terminal device includes third identification information And fourth identification information;

The feedback information includes the first identification information, the identification information of the second terminal device, and the CRC information scrambled according to the second identification information;

Alternatively, the feedback information includes identification information of the first terminal device, the third identification information, and CRC information scrambled according to the fourth identification information.
The first terminal device according to claim 44, wherein the identification information of the first terminal device includes first identification information and second identification information, and the identification information of the second terminal device includes third identification information And fourth identification information;

The feedback information includes the first identification information and CRC information scrambled according to the second identification information and the identification information of the second terminal device;

Alternatively, the feedback information includes the third identification information, and CRC information scrambled according to the identification information of the first terminal device and the fourth identification information.
The first terminal device according to claim 44, wherein the first terminal device receiving feedback information from the second terminal device includes:

The first terminal device receives the feedback information sent by the second terminal device through the first channel; wherein, the ZC sequence used by the first channel is based on the identification information of the first terminal device and the second The identification information of the terminal device is generated.
A first terminal device is characterized by comprising:

A sending unit, configured to send the direct link control information SCI to the second terminal device;

The sending unit is further configured to send data to the second terminal device, and the SCI includes scheduling information of the data; wherein the SCI is used to indicate partial identification information of the first terminal device, or, The SCI is used to indicate partial identification information of the second terminal device.
The first terminal device according to claim 49, wherein the identification information of the first terminal device includes first identification information and second identification information, and the identification information of the second terminal device includes third identification information And fourth identification information;

The SCI includes CRC information scrambled according to the first identification information, and the data includes the second identification information and identification information of the second terminal device;

Alternatively, the SCI includes CRC information scrambled according to the third identification information, and the data includes identification information of the first terminal device and the fourth identification information.
A second terminal device is characterized by comprising:

A receiving unit, configured to receive direct link control information SCI from a first terminal device; wherein, the SCI is used to indicate identification information of the first terminal device and identification information of the second terminal device, or, The SCI is used to indicate or include identification information of the first terminal device and partial identification information of the second terminal device, or the SCI is used to indicate or include partial identification information of the first terminal device and Identification information of the second terminal device;

The receiving unit is further configured to receive data from the first terminal device, and the SCI includes scheduling information of the data; the determining unit is configured to determine identification information of the first terminal device according to the SCI Or, the second terminal device determines the identification information of the first terminal device according to the SCI and the data.
The second terminal device according to claim 51, wherein the SCI includes any one of the following:

The identification information of the first terminal device and the identification information of the second terminal device;

The identification information of the first terminal device and the cyclic redundancy check CRC information scrambled according to the identification information of the second terminal device;

The identification information of the second terminal device and the CRC information scrambled according to the identification information of the first terminal device;

CRC information scrambled according to the identification information of the first terminal device and the identification information of the second terminal device.
The second terminal device according to claim 51, wherein the identification information of the first terminal device includes first identification information and second identification information, and the identification information of the second terminal device includes third identification information And fourth identification information;

The SCI includes the first identification information, the identification information of the second terminal device, and the CRC information scrambled according to the second identification information;

Alternatively, the SCI includes the third identification information, the identification information of the first terminal device, and the CRC information scrambled according to the fourth identification information.
The second terminal device according to claim 51, wherein the identification information of the first terminal device includes first identification information and second identification information, and the identification information of the second terminal device includes third identification information And fourth identification information;

The SCI includes CRC information scrambled according to the first identification information and the identification information of the second terminal device;

Alternatively, the SCI includes CRC information scrambled according to the identification information of the first terminal device and the third identification information.
The second terminal device according to claim 51, wherein when the SCI includes CRC information scrambled according to the first identification information and the identification information of the second terminal device, the The SCI also includes the second identification information; or, the data includes the second identification information.
The second terminal device according to claim 51, wherein when the SCI includes CRC information scrambled according to the identification information of the first terminal device and the third identification information, the The SCI also includes the fourth identification information; or, the data includes the fourth identification information.
The second terminal device according to claim 51, further comprising:

A sending unit, configured to send feedback information to the first terminal device, the feedback information is used to feed back whether the data is received correctly, and the feedback information is also used to indicate or include identification information of the first terminal device And at least one item of identification information of the second terminal device.
A second terminal device is characterized by comprising:

A receiving unit, configured to receive data from the first terminal device;

A sending unit, configured to send feedback information to the first terminal device, the feedback information is used to feed back whether the data is received correctly, and the feedback information is also used to indicate or include identification information of the first terminal device And at least one item of identification information of the second terminal device.
The second terminal device according to claim 58, wherein the feedback information includes any one of the following:

The identification information of the first terminal device and the identification information of the second terminal device;

Identification information of the first terminal device, and cyclic redundancy check CRC information scrambled according to the identification information of the second terminal device;

Identification information of the second terminal device, and CRC information scrambled according to the identification information of the first terminal device;

CRC information scrambled according to the identification information of the first terminal device and the identification information of the second terminal device.
The second terminal device according to claim 58, wherein the identification information of the first terminal device includes first identification information and second identification information, and the identification information of the second terminal device includes third identification information And fourth identification information;

The feedback information includes the first identification information, the identification information of the second terminal device, and the CRC information scrambled according to the second identification information;

Alternatively, the feedback information includes identification information of the first terminal device, the third identification information, and CRC information scrambled according to the fourth identification information.
The second terminal device according to claim 58, wherein the identification information of the first terminal device includes first identification information and second identification information, and the identification information of the second terminal device includes third identification information And fourth identification information;

The feedback information includes the first identification information and CRC information scrambled according to the second identification information and the identification information of the second terminal device;

Alternatively, the feedback information includes the third identification information, and CRC information scrambled according to the identification information of the first terminal device and the fourth identification information.
The second terminal device according to claim 58, wherein:

The sending unit is specifically configured to send the feedback information to the first terminal device through a first channel; wherein, the ZC sequence used by the first channel is based on the identification information of the first terminal device and the first 2. The identification information of the terminal device is generated.
A second terminal device is characterized by comprising:

The receiving unit is used to receive direct link control information SCI from the first terminal device; the receiving unit is also used to receive data from the first terminal device, the SCI includes scheduling information of the data Wherein the SCI is used to indicate or include part of the identification information of the first terminal device, or the SCI is used to indicate or include part of the identification information of the second terminal device.
The second terminal device according to claim 63, wherein the identification information of the first terminal device includes first identification information and second identification information, and the identification information of the second terminal device includes third identification information And fourth identification information;

The SCI includes CRC information scrambled according to the first identification information, and the data includes the second identification information and identification information of the second terminal device;

Alternatively, the SCI includes CRC information scrambled according to the third identification information, and the data includes identification information of the first terminal device and the fourth identification information.
A first terminal device is characterized by comprising a processor, a memory and a transceiver, the processor and the memory are coupled, the processor is used to run instructions or programs in the memory, the transceiver and The processor is coupled, and the transceiver is used to send direct link control information SCI to a second terminal device; wherein, the SCI is used to indicate or include identification information of the first terminal device and the second terminal Device identification information, or the SCI is used to indicate or include the identification information of the first terminal device and part of the identification information of the second terminal device, or the SCI is used to indicate or include the first Part of the identification information of the terminal device and the identification information of the second terminal device;

The transceiver is also used to send data to the second terminal device, and the SCI includes scheduling information of the data.
The first terminal device according to claim 65, wherein the SCI includes any one of the following:

The identification information of the first terminal device and the identification information of the second terminal device;

The identification information of the first terminal device and the cyclic redundancy check CRC information scrambled according to the identification information of the second terminal device;

The identification information of the second terminal device and the CRC information scrambled according to the identification information of the first terminal device;

CRC information scrambled according to the identification information of the first terminal device and the identification information of the second terminal device.
The first terminal device according to claim 65, wherein the identification information of the first terminal device includes first identification information and second identification information, and the identification information of the second terminal device includes third identification information And fourth identification information;

The SCI includes the first identification information, the identification information of the second terminal device, and the CRC information scrambled according to the second identification information;

Or, the SCI includes the third identification information, the identification information of the first terminal device, and the CRC information scrambled according to the fourth identification information;

Or, the SCI includes CRC information scrambled according to the first identification information and the identification information of the second terminal device and the second identification information;

Or, the SCI includes CRC information scrambled according to the identification information of the first terminal device and the third identification information and the fourth identification information;

Or, the SCI includes CRC information scrambled according to the first identification information and the identification information of the second terminal device, and the data includes the second identification information;

Alternatively, the SCI includes CRC information scrambled according to the identification information of the first terminal device and the third identification information, and the data includes the fourth identification information.
The first terminal device according to claim 68, characterized in that

The transceiver is also used to receive feedback information from the second terminal device;

The processor is further configured to determine the identification information of the second terminal device according to the feedback information; wherein, the feedback information is used to feed back whether the data is received correctly, and the feedback information is also used to indicate or include At least one item of identification information of the first terminal device and identification information of the second terminal device.
A first terminal device is characterized by comprising a processor, a memory and a transceiver, the processor and the memory are coupled, the processor is used to run instructions or programs in the memory, the transceiver and The processor is coupled, and the transceiver is used to send data to a second terminal device;

The transceiver is also used to receive feedback information from the second terminal device; wherein the feedback information is used to feedback whether the data is correctly received, and the feedback information is also used to indicate or include the first At least one item of identification information of a terminal device and identification information of the second terminal device;

The processor is configured to determine the identification information of the second terminal device according to the feedback information.
The first terminal device according to claim 69, wherein the feedback information includes any one of the following:

The identification information of the first terminal device and the identification information of the second terminal device;

Identification information of the first terminal device, and cyclic redundancy check CRC information scrambled according to the identification information of the second terminal device;

Identification information of the second terminal device, and CRC information scrambled according to the identification information of the first terminal device;

CRC information scrambled according to the identification information of the first terminal device and the identification information of the second terminal device.
The first terminal device according to claim 69, wherein the identification information of the first terminal device includes first identification information and second identification information, and the identification information of the second terminal device includes third identification information And fourth identification information;

The feedback information includes the first identification information, the identification information of the second terminal device, and the CRC information scrambled according to the second identification information;

Or, the feedback information includes identification information of the first terminal device, the third identification information, and CRC information scrambled according to the fourth identification information;

Or, the feedback information includes the first identification information, and CRC information scrambled according to the second identification information and the identification information of the second terminal device;

Alternatively, the feedback information includes the third identification information, and CRC information scrambled according to the identification information of the first terminal device and the fourth identification information.
The first terminal device according to claim 69, characterized in that

Receiving feedback information from the second terminal device includes: receiving the feedback information sent by the second terminal device through a first channel; wherein, the ZC sequence used by the first channel is based on the first terminal device And the identification information of the second terminal device are generated.
A first terminal device is characterized by comprising a processor, a memory and a transceiver, the processor and the memory are coupled, the processor is used to run instructions or programs in the memory, the transceiver and The processor is coupled, the transceiver is used to send direct link control information SCI to a second terminal device; and the transceiver is also used to send data to the second terminal device, the SCI includes all Scheduling information of the data; wherein the SCI is used to indicate or include partial identification information of the first terminal device, or the SCI is used to indicate or include partial identification information of the second terminal device.
The first terminal device according to claim 73, wherein the identification information of the first terminal device includes first identification information and second identification information, and the identification information of the second terminal device includes third identification information And fourth identification information;

The SCI includes CRC information scrambled according to the first identification information, and the data includes the second identification information and identification information of the second terminal device;

Alternatively, the SCI includes CRC information scrambled according to the third identification information, and the data includes identification information of the first terminal device and the fourth identification information.
A second terminal device is characterized by comprising a processor, a memory and a transceiver, the processor and the memory are coupled, the processor is used to run instructions or programs in the memory, the transceiver and The processor is coupled, and the transceiver is used to receive direct link control information SCI from the first terminal device;

Wherein, the SCI is used to indicate or include identification information of the first terminal device and the identification information of the second terminal device, or the SCI is used to indicate or include identification information of the first terminal device and Partial identification information of the second terminal device, or the SCI is used to indicate or include partial identification information of the first terminal device and identification information of the second terminal device; and the transceiver, also used To receive data from the first terminal device, the SCI includes scheduling information of the data; the processor is configured to determine identification information of the first terminal device according to the SCI, or according to the The SCI and the data determine the identification information of the first terminal device.
The second terminal device according to claim 75, wherein the SCI includes any one of the following:

The identification information of the first terminal device and the identification information of the second terminal device;

The identification information of the first terminal device and the cyclic redundancy check CRC information scrambled according to the identification information of the second terminal device;

The identification information of the second terminal device and the CRC information scrambled according to the identification information of the first terminal device;

CRC information scrambled according to the identification information of the first terminal device and the identification information of the second terminal device.
The second terminal device according to claim 75, wherein the identification information of the first terminal device includes first identification information and second identification information, and the identification information of the second terminal device includes third identification information And fourth identification information;

The SCI includes the first identification information, the identification information of the second terminal device, and the CRC information scrambled according to the second identification information;

Alternatively, the SCI includes the third identification information, the identification information of the first terminal device, and the CRC information scrambled according to the fourth identification information.
The second terminal device according to claim 75, wherein the identification information of the first terminal device includes first identification information and second identification information, and the identification information of the second terminal device includes third identification information And fourth identification information;

The SCI includes CRC information scrambled according to the first identification information and the identification information of the second terminal device;

Alternatively, the SCI includes CRC information scrambled according to the identification information of the first terminal device and the third identification information.
The second terminal device according to claim 75, wherein when the SCI includes CRC information scrambled according to the first identification information and the identification information of the second terminal device, the The SCI also includes the second identification information; or, the data includes the second identification information.
The second terminal device according to claim 75, wherein when the SCI includes CRC information scrambled according to the identification information of the first terminal device and the third identification information, the The SCI also includes the fourth identification information; or, the data includes the fourth identification information.
The second terminal device according to claim 75, wherein the transceiver is further configured to send feedback information to the first terminal device, the feedback information is used to feed back whether the data is correctly received, and The feedback information is also used to indicate at least one of the identification information of the first terminal device and the identification information of the second terminal device.
A second terminal device is characterized by comprising a processor, a memory and a transceiver, the processor and the memory are coupled, the processor is used to run instructions or programs in the memory, the transceiver and The processor is coupled, the transceiver is used to receive data from the first terminal device; and the transceiver is also used to send feedback information to the first terminal device, the feedback information is used to feedback Whether the data is correctly received, and the feedback information is also used to indicate or include at least one of the identification information of the first terminal device and the identification information of the second terminal device.
The second terminal device according to claim 82, wherein the feedback information includes any one of the following:

The identification information of the first terminal device and the identification information of the second terminal device;

Identification information of the first terminal device, and cyclic redundancy check CRC information scrambled according to the identification information of the second terminal device;

Identification information of the second terminal device, and CRC information scrambled according to the identification information of the first terminal device;

CRC information scrambled according to the identification information of the first terminal device and the identification information of the second terminal device.
The second terminal device according to claim 82, wherein the identification information of the first terminal device includes first identification information and second identification information, and the identification information of the second terminal device includes third identification information And fourth identification information;

The feedback information includes the first identification information, the identification information of the second terminal device, and the CRC information scrambled according to the second identification information;

Alternatively, the feedback information includes identification information of the first terminal device, the third identification information, and CRC information scrambled according to the fourth identification information.
The second terminal device according to claim 82, wherein the identification information of the first terminal device includes first identification information and second identification information, and the identification information of the second terminal device includes third identification information And fourth identification information;

The feedback information includes the first identification information and CRC information scrambled according to the second identification information and the identification information of the second terminal device;

Alternatively, the feedback information includes the third identification information, and CRC information scrambled according to the identification information of the first terminal device and the fourth identification information.
The second terminal device according to claim 82, wherein the transceiver is specifically configured to send the feedback information to the first terminal device through a first channel; wherein, the first channel uses The ZC sequence is generated based on the identification information of the first terminal device and the identification information of the second terminal device.
A second terminal device is characterized by comprising a processor, a memory and a transceiver, the processor and the memory are coupled, the processor is used to run instructions or programs in the memory, the transceiver and The processor is coupled, the transceiver is used to receive direct link control information SCI from the first terminal device; and the transceiver is also used to receive data from the first terminal device, the The SCI includes scheduling information of the data; wherein the SCI is used to indicate or include partial identification information of the first terminal device, or the SCI is used to indicate or include partial identification information of the second terminal device .
The second terminal device according to claim 87, wherein the identification information of the first terminal device includes first identification information and second identification information, and the identification information of the second terminal device includes third identification information And fourth identification information;

The SCI includes CRC information scrambled according to the first identification information, and the data includes the second identification information and identification information of the second terminal device;

Alternatively, the SCI includes CRC information scrambled according to the third identification information, and the data includes identification information of the first terminal device and the fourth identification information.
A communication system, characterized in that it includes a first terminal device and a second terminal device;

Wherein, the first terminal device is used to send the direct link control information SCI to the second terminal device; wherein, the SCI is used to indicate or include the identification information of the first terminal device and the identification of the second terminal device Information, or the SCI is used to indicate or include identification information of the first terminal device and part of the identification information of the second terminal device, or the SCI is used to indicate or include the first terminal device Part of the identification information and the identification information of the second terminal device; sending data to the second terminal device, the SCI includes scheduling information of the data;

The second terminal device is used to receive direct link control information SCI from the first terminal device; receive data from the first terminal device; determine the identification information of the first terminal device according to the SCI, or, The second terminal device determines the identification information of the first terminal device according to the SCI and the data.
A communication system, characterized in that it includes a first terminal device and a second terminal device;

Wherein, the first terminal device is used to send data to the second terminal device; receiving feedback information from the second terminal device; wherein, the feedback information is used to feedback whether the data is received correctly, and the feedback information is also For indicating or including at least one of the identification information of the first terminal device and the identification information of the second terminal device; determining the identification information of the second terminal device according to the feedback information;

The second terminal device is used to receive data from the first terminal device; and send feedback information to the first terminal device.
A communication system, characterized in that it includes a first terminal device and a second terminal device;

The first terminal device is used to send direct link control information SCI to the second terminal device; data is sent to the second terminal device, and the SCI includes scheduling information of the data; wherein the SCI is used to indicate or Including partial identification information of the first terminal device, or the SCI is used to indicate or include partial identification information of the second terminal device;

The second terminal device is used for receiving direct link control information SCI from the first terminal device; receiving data from the first terminal device.
A computer-readable storage medium storing program instructions, which when executed by a processor of a computer, causes the processor to execute any of claims 1-11 A corresponding method; or, causing the processor to execute the corresponding method according to any one of claims 12-16; or, causing the processor to execute the corresponding method according to any one of claims 17-18 Method; or, causing the processor to execute the corresponding method according to any one of claims 19-29; or, causing the processor to execute the corresponding method according to any one of claims 30-34; Alternatively, the processor is caused to execute the corresponding method according to any one of claims 35-36.
A computer program product, characterized in that, when it runs on a computer, it causes the computer to execute the corresponding method according to any one of claims 1-11; or, causes the computer to execute the claims 12-16 The corresponding method according to any one of the claims; or, causing the computer to execute the corresponding method according to any of claims 17-18; or, causing the computer to execute the corresponding method according to any of claims 19-29 The corresponding method as described; or, causing the computer to execute the corresponding method according to any one of claims 30-34; or, causing the computer to execute the corresponding method according to any one of claims 35-36 method.
An apparatus, characterized in that the apparatus includes a processor, which is used to couple with a memory, and read instructions in the memory and execute the corresponding according to any one of claims 1-11 according to the instructions Method; or, the corresponding method according to any one of claims 12-16; or, the corresponding method according to any one of claims 17-18; or, the method according to any one of claims 19-29 The corresponding method according to any one of the claims; or, the corresponding method according to any one of the claims 30-34; or the corresponding method according to any one of the claims 35-36.