Data transmission / reception device and method

Abstract

In an embodiment of the present invention, a data transmission / reception device and method are provided, which include: determining first signature information of a first terminal device and / or first signature information of a second terminal device in an adaptation layer of the third terminal device; receiving data from the first terminal device; and transmitting data to the second terminal device based on the first signature information of the first terminal device and / or the first signature information of the second terminal device and / or the second signature information of the first terminal device and / or the second signature information of the second terminal device, thereby reducing data transmission overhead in the adaptation layer and saving radio resources.

Description

[Technical Field]

[0001] The present invention relates to the field of communications. [Background technology]

[0002] The 3GPP (Trademark) 5th Generation Mobile Communication Technology (5G) standardization process introduces a new technology that allows user equipment (UE) to discover and / or communicate with each other directly using sidelink (SL) communication technology, where the sidelink interface may be referred to as a PC5 interface. For example, vehicle-to-everything (V2X) communication, public safety (PS) communication, and direct file transfer between user equipments may rely on communication over the sidelink interface.

[0003] In addition, Release 17 (R17) also introduces user equipment (UE)-to-user equipment (UE) relay (UE-to-UE relay, or U2U relay). UE-to-UE relay refers to communication between a "source user equipment (Source UE)" and a "destination user equipment (Destination UE)" (which may also be referred to as a "source remote UE" and a "destination remote UE" or collectively referred to as a "remote UE") via a "relay user equipment (Relay UE)." Sidelink communication is used between the Source UE and Relay UE, and sidelink communication is used between the Relay UE and Destination UE, which effectively extends the coverage of sidelink transmission between the Source UE and Destination UE and effectively saves the transmission power of the remote UE.

[0004] It should be noted that the introduction of the above background art is intended to clearly and completely explain the technical solutions of the present invention and to facilitate understanding by those skilled in the art, and these technical solutions described in the background art of the present invention should not be construed as being well known to those skilled in the art. Summary of the Invention [Problem to be solved by the invention]

[0005] The R17 U2U relay protocol stack introduces an adaptation layer (ADAPT), also known as the Sidelink Relay Adaptation protocol (SRAP) layer.

[0006] The inventors have found that, since the concept of adaptation layer is introduced, how to determine the identification (ID (identifier)) information of the source UE and / or the identification information of the destination UE in the adaptation layer, and how to perform data transmission based on the identification information of the source UE and / or the identification information of the destination UE are problems to be solved.

[0007] To solve at least one of the above problems, embodiments of the present invention provide a data transmitting and receiving apparatus and method. [Means for solving the problem]

[0008] According to one aspect of an embodiment of the present invention, a data transmission / reception method is provided, which is applied to a third terminal device, and the method includes: determining first identification information of the first terminal device and / or first identification information of the second terminal device in an adaptation layer of the third terminal device; receiving data from the first terminal device; and The method includes transmitting data to the second terminal device based on first identification information of the first terminal device and / or first identification information of the second terminal device and / or second identification information of the first terminal device and / or second identification information of the second terminal device.

[0009] According to another aspect of an embodiment of the present invention, there is provided a data transmission method, which is applied to a first terminal device, the method comprising: Determining first identification information of the first terminal device and / or first identification information of the second terminal device in an adaptation layer of the first terminal device; and The method includes transmitting data to a third terminal device based on first identification information of the first terminal device and / or first identification information of the second terminal device and / or second identification information of the first terminal device and / or second identification information of the second terminal device.

[0010] According to another aspect of the present invention, there is provided a data receiving method, which is applied to a second terminal device, the method comprising: Determining the first signature information of the first terminal device and / or the first signature information of the second terminal device in the adaptation layer of the second terminal device; and The method includes receiving data from the third terminal device based on first identification information of the first terminal device and / or first identification information of the second terminal device and / or second identification information of the first terminal device and / or second identification information of the second terminal device.

[0011] According to another aspect of the present invention, there is provided a data transmitting and receiving device, the data transmitting and receiving device being disposed in a third terminal device, the data transmitting and receiving device comprising: a determining unit for determining first signature information of the first terminal device and / or first signature information of the second terminal device in the adaptation layer of the third terminal device; a receiving unit for receiving data from the first terminal device; and and a transmitting unit for transmitting data to the second terminal device based on first identification information of the first terminal device and / or first identification information of the second terminal device and / or second identification information of the first terminal device and / or second identification information of the second terminal device.

[0012] According to another aspect of an embodiment of the present invention, there is provided a data transmission device, the data transmission device being disposed in a first terminal device, the data transmission device comprising: A determination unit for determining first signature information of the first terminal device and / or first signature information of the second terminal device in the adaptation layer of the first terminal device; and and a transmitting unit for transmitting data to a third terminal device based on the first identification information of the first terminal device and / or the first identification information of the second terminal device and / or the second identification information of the first terminal device and / or the second identification information of the second terminal device.

[0013] According to another aspect of the embodiment of the present invention, there is provided a data receiving device, which is disposed in a second terminal device, and the data receiving device comprises: A determining unit for determining the first signature information of the first terminal device and / or the first signature information of the second terminal device in the adaptation layer of the second terminal device; and and a receiving unit for receiving data from a third terminal device based on first identification information of the first terminal device and / or first identification information of the second terminal device and / or second identification information of the first terminal device and / or second identification information of the second terminal device.

[0014] According to another aspect of an embodiment of the present invention, there is provided a communication system, the communication system including a first terminal device, a second terminal device, and a third terminal device; The first terminal device determines the first identification information of the first terminal device and / or the first identification information of the second terminal device through an adaptation layer, and sends data to a third terminal device; The third terminal device receives the data from the first terminal device, the third terminal device determines the first identification information of the first terminal device and / or the first identification information of the second terminal device in an adaptation layer, and the third terminal device sends data to the second terminal device according to the first identification information of the first terminal device and / or the first identification information of the second terminal device and / or the second identification information of the first terminal device and / or the second identification information of the second terminal device; The second terminal device determines the first identification information of the first terminal device and / or the first identification information of the second terminal device in an adaptation layer, and receives data from the third terminal device based on the first identification information of the first terminal device and / or the first identification information of the second terminal device and / or the second identification information of the first terminal device and / or the second identification information of the second terminal device. [Effects of the Invention]

[0015] The advantageous effects of the embodiments of the present invention are at least as follows: the adaptation layer of the third terminal device determines the first identification information of the first terminal device and / or the first identification information of the second terminal device, the third terminal device receives data from the first terminal device, and transmits data to the second terminal device based on the first identification information of the first terminal device and / or the first identification information of the second terminal device and / or the second identification information of the first terminal device and / or the second identification information of the second terminal device, thereby determining the identification information of the first terminal device and / or the identification information of the second terminal device used in the adaptation layer of the third terminal device, and performing data transmission and reception based on the determined identification information of the first terminal device and / or the identification information of the second terminal device, thereby reducing the data transmission overhead in the adaptation layer and saving radio resources.

[0016] The following description and reference to the drawings disclose in detail particular embodiments of the present invention, illustrating ways in which the principles of the present invention may be employed. However, the scope of the present invention is not limited thereto. Embodiments of the present invention may include various changes, modifications, and alternatives within the scope of the appended claims.

[0017] Additionally, features described and / or illustrated with respect to one embodiment may be used in the same or similar manner in one or more other embodiments, may be combined with features in the other embodiments, or may be substituted for features in the other embodiments.

[0018] It should be noted that when used in this specification, terms such as "comprise / have" refer to the presence of a feature, element, step, or assembly, but do not exclude the presence or addition of one or more other features, elements, steps, or assemblies. [Brief explanation of the drawings]

[0019] Elements and features described in one drawing or one embodiment of the invention may be combined with elements and features shown in one or more other drawings or embodiments, and in the drawings, like reference numerals are used to indicate corresponding parts in several drawings and also to indicate corresponding parts used in multiple embodiments. [Figure 1] FIG. 2 illustrates the architecture of a system protocol stack in an embodiment of the present invention. [Figure 2] FIG. 1 illustrates a scenario of an embodiment of the present invention. [Figure 3] 1 is a schematic diagram of a data transmission and reception method according to an embodiment of the present invention; [Figure 4] A figure showing an example in which a third terminal device assigns first identification information of a first terminal device and / or first identification information of a second terminal device in an embodiment of the present invention. [Figure 5] A figure showing an example in which a first terminal device assigns first identification information of the first terminal device and / or first identification information of a second terminal device in an embodiment of the present invention. [Figure 6] FIG. 10 is a diagram showing another example in which a first terminal device assigns first identification information of the first terminal device and / or first identification information of a second terminal device in an embodiment of the present invention. [Figure 7] A figure showing an example in which a second terminal device assigns first identification information of a first terminal device and / or first identification information of a second terminal device in an embodiment of the present invention. [Figure 8] FIG. 10 is a diagram showing another example in which a second terminal device assigns first identification information of a first terminal device and / or first identification information of a second terminal device in an embodiment of the present invention. [Figure 9] 10 is a diagram illustrating an example in which a network device assigns first identification information of a first terminal device and / or first identification information of a second terminal device in an embodiment of the present invention. [Figure 10] FIG. 10 is a diagram illustrating another example in which a network device assigns first identification information of a first terminal device and / or first identification information of a second terminal device in an embodiment of the present invention. [Figure 11] FIG. 10 is a diagram illustrating an example of data transmission in an embodiment of the present invention. [Figure 12] FIG. 10 is a diagram illustrating another example of data transmission in an embodiment of the present invention. [Figure 13] FIG. 2 is a schematic diagram of a data transmission method according to an embodiment of the present invention. [Figure 14] FIG. 2 is a schematic diagram of a data receiving method according to an embodiment of the present invention. [Figure 15] 1 is a schematic diagram of a data transmitting and receiving device according to an embodiment of the present invention; [Figure 16] 1 is a schematic diagram of a data transmission device according to an embodiment of the present invention; [Figure 17] 1 is a schematic diagram of a data receiving device according to an embodiment of the present invention; [Figure 18] FIG. 1 is a configuration diagram of a network device according to an embodiment of the present invention. [Figure 19] FIG. 2 is a schematic diagram of a terminal device according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0020] The foregoing and other features of the present invention will become more apparent from a consideration of the accompanying drawings and the following description. While the specification and drawings disclose particular embodiments of the present invention, they illustrate only some of the embodiments which may employ the principles of the present invention, and it is to be understood that the present invention is not limited to the described embodiments, but rather includes all modifications, variations, and alternatives which fall within the scope of the appended claims.

[0021] In embodiments of the present invention, the term "communication network" or "wireless communication network" may refer to a network conforming to any communication standard, such as New Radio (NR), Long Term Evolution (LTE), LTE-Advanced (LTE-A), Wideband Code Division Multiple Access (WCDMA), High-Speed ​​Packet Access (HSPA), etc.

[0022] Additionally, communications between devices in a communications system may be performed according to any level of communications protocol, including, but not limited to, 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G, 5G, New Radio (NR), and / or other conventional or future-developed communications protocols.

[0023] In the embodiments of the present invention, the term "network equipment" refers to, for example, a device in a communication system that connects a terminal device to a communication network and provides services to the terminal device. The network equipment may include, but is not limited to, a node and / or a donor in an IAB architecture, a base station (BS), an access point (AP), a transmission reception point (TRP), a broadcast transmitter, a mobile management entity (MME), a network gateway, a server, a radio network controller (RNC), a base station controller (BSC), etc.

[0024] A base station may include, but is not limited to, a Node B (NodeB or NB), an evolved Node B (eNodeB or eNB), a 5G base station (gNB), etc., and may further include a Remote Radio Head (RRH), a Remote Radio Unit (RRU), a relay, or a low-power node (e.g., femto, pico, etc.). The term "base station" may also include some or all of the functionality thereof, and each base station can provide communication coverage for a particular geographic area. The term "cell" may refer to a base station and / or the area it covers, depending on the context in which the term is used.

[0025] In embodiments of the present invention, the term "User Equipment" (UE) or "Terminal Equipment" (TE) refers to a device that accesses a communication network and receives services from the network, for example, via network equipment. User equipment may be fixed or mobile, and may also be referred to as a mobile station (MS), a terminal, a subscriber station (SS), an access terminal (AT), a station, etc.

[0026] User equipment may include, but is not limited to, cellular phones, personal digital assistants (PDAs), wireless modems, wireless communication devices, mobile devices, machine-type communication devices, laptop computers, cordless phones, smartphones, smart watches, digital cameras, and the like.

[0027] Furthermore, for example, in the case of a scenario such as the Internet of Things (IoT), the user equipment may also be a monitoring or measuring device or apparatus, including, but not limited to, a Machine Type Communication (MTC) terminal, an in-vehicle communication terminal, a Device to Device (D2D) terminal, a Machine to Machine (M2M) terminal, etc.

[0028] Furthermore, the term "network side" or "network equipment side" refers to the network side, which may be a base station or may include one or more network equipment as described above. The term "user side" or "terminal side" or "terminal equipment side" refers to the user or terminal side, which may be a UE or may include one or more terminal equipment as described above. Unless otherwise specified, "equipment" may refer to either network equipment or terminal equipment.

[0029] 1 is a schematic diagram of a system protocol stack architecture in an embodiment of the present invention, including a user plane protocol stack diagram (shown in the diagram on the left side of FIG. 1 ) and a control plane protocol stack diagram (shown in the diagram on the right side of FIG. 1 ). As shown in FIG. 1 , the link of the PC5 interface supports an adaptation layer ADAPT. In the user plane protocol stack diagram, the IP layer, the SDAP layer, and the RRC layer are located above the ADAPT layer, and the RLC layer, the MAC layer, and the PHY layer are located below the ADAPT layer. In the control plane protocol stack diagram, the RRC layer is located above the ADAPT layer, and the RLC layer, the MAC layer, and the PHY layer are located below the ADAPT layer. Optionally, ADAPT in FIG. 1 may be replaced with SRAP, and the present invention is not limited thereto. In the user plane protocol stack diagram, the IP layer, SDAP layer, and PDCP layer are terminated between two remote UEs, and the RLC layer, MAC layer, and PHY layer are terminated at each PC5 link. In the control plane protocol stack diagram, the RRC layer is terminated between two remote UEs, and the RLC layer, MAC layer, and PHY layer are terminated at each PC5 link.

[0030] Hereinafter, the scenario of the embodiment of the present invention will be described through an example, but the present invention is not limited thereto.

[0031] Figure 2 is a schematic diagram of a scenario of an embodiment of the present invention. For convenience, Figure 2 only exemplarily illustrates the signaling interaction and data transmission mode between a relay UE 203 and a source UE 201 and a destination UE 202 in UE-to-UE relay. Release 17 has studied UE-to-UE relay, which can extend the coverage of sidelink transmission between two remote UEs and save power. The scenario of the present invention includes at least one of the following scenarios: All UEs (Source UE, Relay UE and Destination UE) are within the network coverage; All UEs (Source UE, Relay UE and Destination UE) are outside the coverage of the network; and Partial coverage, in which at least one UE (Source UE, Relay UE, or Destination UE) is located within the coverage of the network and at least one UE (Source UE, Relay UE, or Destination UE) is located outside the coverage of the network.

[0032] Regarding the protocol stack structures of the relay UE 203, source UE 201, and destination UE 202 in FIG. 2, the protocol stacks in FIG. 1 can be referred to, and detailed description thereof will be omitted here.

[0033] For Layer 2 (L2) UE-to-Network relay, the network equipment (gNB) assigns remote UE identification information, e.g., a local ID of the remote UE, to be used in the adaptation layer.

[0034] However, the inventors have found that for Layer 2 (L2) U2U relaying, the relay UE needs to know to forward data from a source UE to a corresponding destination UE and / or inform the destination UE which source UE the data comes from, and if the existing Layer 2 identifier (L2 ID) of the remote UE is directly added to the header of the U2U relay adaptation layer, it will occupy a relatively large signaling overhead, and if the adaptation layer uses the identifier information of the source UE and / or the identifier information of the destination UE, for example, the local or temporary identifiers of the source UE and / or the destination UE, the signaling overhead can be saved.

[0035] Therefore, how to determine the signature information of the source UE and / or the signature information of the destination UE in the adaptation layer, and how to transmit data based on the signature information of the source UE and / or the signature information of the destination UE are problems that need to be solved.

[0036] In view of at least one of the above problems, embodiments of the present invention provide a data transmitting and receiving apparatus and method.

[0037] <Example of the first aspect> An embodiment of the present invention provides a method for transmitting and receiving data.

[0038] 3 is a schematic diagram of a data transmission and reception method according to an embodiment of the present invention. As shown in FIG. 3, the method is applied to a third terminal device, and includes the following steps (operations): 301: determining first identification information of the first terminal device and / or first identification information of the second terminal device in an adaptation layer of a third terminal device; 302: Receive data from a first terminal device; and 303: Send data to the second terminal device based on the first identification information of the first terminal device and / or the first identification information of the second terminal device and / or the second identification information of the first terminal device and / or the second identification information of the second terminal device.

[0039] This allows the identification information of the first terminal device and / or the identification information of the second terminal device to be determined to be used in the adaptation layer of the third terminal device, and data transmission and reception can be performed based on the determined identification information of the first terminal device and / or the identification information of the second terminal device, thereby reducing the data transmission overhead in the adaptation layer and saving radio resources.

[0040] Although the above-mentioned FIG. 3 illustrates an embodiment of the present invention and uses a terminal device as an example, the present invention is not limited thereto. For example, the execution order of each operation can be appropriately adjusted, some operations can be appropriately added or removed, and the targets of the above-mentioned operations can also be adjusted. Those skilled in the art can make appropriate modifications based on the above content without being limited to the description of the above-mentioned FIG. 3.

[0041] In some implementations, the first terminal device is a source remote device, such as Source UE 201 in FIG. 2, the second terminal device is a destination remote device, such as Destination UE 202 in FIG. 2, and the third terminal device is a relay device, such as Relay UE 203 in FIG. 2.

[0042] In some implementations, the first signature information is a terminal device signature (UE ID) used in the adaptation layer, such as a terminal device local ID, and the second signature information is a Layer 2 ID (L2 ID), where the L2 ID may be determined by the terminal device application layer, V2X layer, or NAS layer according to an existing method. For example, the first signature information may also be referred to as a temporary identifier, and its length may be, for example, 8 bits, 12 bits, etc., which can reduce overhead compared with the L2 ID (the length of the L2 ID is 24 bits). The specific content of the local ID can be referenced in the prior art, and is not limited thereto in the present invention.

[0043] The specific process of determining the first signature information of the first terminal device and / or the first signature information of the second terminal device in step 301 will be described below by way of example.

[0044] In some implementations, the first identification information of the first terminal device and / or the first identification information of the second terminal device is determined by at least one of the following assignments: assignment of the first terminal device, assignment of the second terminal device, assignment of the third terminal device, and assignment or pre-setting of the network device.

[0045] The allocation of the third terminal device will be described below as an example.

[0046] In some implementations, the third terminal device assigning the first identification information of the first terminal device and / or the first identification information of the second terminal device includes the third terminal device sending the first identification information of the first terminal device and / or the first identification information of the second terminal device to the first terminal device; and the third terminal device sending the first identification information of the first terminal device and / or the first identification information of the second terminal device to the second terminal device.

[0047] FIG. 4 is a diagram illustrating an example in which a third terminal device assigns first identification information of a first terminal device and / or first identification information of a second terminal device in an embodiment of the present invention.

[0048] As shown in Figure 4, the first terminal device includes a source UE201, the second terminal device includes a destination UE202, and the third terminal device includes a U2U relay UE203, and the first identification information of the first terminal device includes a local ID (Source local ID) of the source UE201, the first identification information of the second terminal device includes a local ID (Destination local ID) of the destination UE202, the second identification information of the first terminal device includes an L2 ID (Source L2 ID) of the source UE201, and the second identification information of the second terminal device includes an L2 ID (Destination L2 ID) of the destination UE202.

[0049] For example, the third terminal device assigning the first identification information of the first terminal device and / or the first identification information of the second terminal device includes the following steps: 401: The relay UE 203 sends a Source local ID and / or a Destination local ID to the source UE 201; and 402: The relay UE 203 sends the Source local ID and / or Destination local ID to the destination UE 202.

[0050] For example, the relay UE 203 sends a Source local ID and a Destination local ID to the source UE 201 and the destination UE 202, or for example, the relay UE 203 only sends a Source local ID to the source UE 201 and the destination UE 202, where the source UE, relay UE, and destination UE can determine the corresponding destination UE 202 based on the Source local ID, for example, the Source local ID and the Destination local ID have a predefined one-to-one correspondence relationship (or there may be other correspondence manners, and the present invention is not limited thereto). Note that, for example, the combinations of other contents sent by the relay UE 203 in steps 401 and 402 are the same as the examples above, and a comprehensive listing will be omitted here.

[0051] In this way, by assigning the relay UE, the source UE, the relay UE and the destination UE can all determine the source UE 201 and the corresponding destination UE 202, so that data can be transmitted and received between the source UE, the relay UE and the destination UE.

[0052] Furthermore, for example, the present invention does not limit the order of step 401 and step 402. That is, the relay UE 203 may first send the Source local ID and / or Destination local ID to the source UE 201, and then send the Source local ID and / or Destination local ID to the destination UE 202; alternatively, the relay UE 203 may first send the Source local ID and / or Destination local ID to the destination UE 202, and then send the Source local ID and / or Destination local ID to the source UE 201.

[0053] In some implementations, the third terminal device assigning the first identification information of the first terminal device and / or the first identification information of the second terminal device includes sending the first identification information of the second terminal device and the second identification information of the second terminal device to the first terminal device; and / or sending the first identification information of the first terminal device and the second identification information of the first terminal device to the second terminal device.

[0054] For example, still taking FIG. 4 as an example, the relay UE 203 can send a Destination local ID and a Destination L2 ID to the source UE 201 in step 401 (not shown in FIG. 4), and / or the relay UE 203 can send a Source local ID and a Source L2 ID to the destination UE 202 in step 402 (not shown in FIG. 4).

[0055] For example, the relay UE 203 sends the Destination local ID and the Destination L2 ID to the source UE 201 and / or the relay UE 203 sends the Source local ID and the Source L2 ID to the destination UE 202 .

[0056] In some implementations, the third terminal device sends the second identification information of the first terminal device (Source L2 ID) and / or the second identification information of the second terminal device (Destination L2 ID) to the first terminal device, for example, sending a Source local ID and its corresponding Source L2 ID and / or a Destination local ID and its corresponding Destination L2 ID.

[0057] In some implementations, the third terminal device transmits to the second terminal device second identification information (Source L2 ID) of the first terminal device and / or second identification information (Destination L2 ID) of the second terminal device, for example, transmitting a Source local ID and its corresponding Source L2 ID and / or a Destination local ID and its corresponding Destination L2 ID.

[0058] In some implementations, the third terminal device and / or the first terminal device and / or the second terminal device store a correspondence between a Source local ID and a Source L2 ID, and / or store a correspondence between a Destination local ID and a Destination L2 ID.

[0059] In this way, by assigning the relay UE, the source UE, the relay UE and the destination UE can all determine the source UE 201 and the corresponding destination UE 202, so that data can be transmitted and received between the source UE, the relay UE and the destination UE.

[0060] In some implementations, the third terminal device transmits the first identification information of the first terminal device and / or the second identification information of the first terminal device and / or the first identification information of the second terminal device and / or the second identification information of the second terminal device to the first terminal device and / or the second terminal device by first signaling or second signaling.

[0061] For example, as shown in FIG. 4, in step 401, the relay UE 203 sends a source local ID and / or a destination local ID to the source UE 201 through the first signaling or the second signaling, and in step 402, the relay UE 203 sends a source local ID and / or a destination local ID to the destination UE 202 through the first signaling or the second signaling.

[0062] In some implementations, the first signaling is PC5-S signaling, for example, the first signaling is signaling in a PC5 interface, such as PC5-S signaling, or V2X (Vehicle-to-everything) layer signaling, or Non-Access Stratum (NAS) signaling.

[0063] In some implementations, the first signaling includes at least one of the following signaling: a direct communication request and / or a direct communication accept; a discovery message (e.g., a discovery solicitation) and / or a discovery response message (e.g., a discovery response); and other PC5-S messages.

[0064] For example, in step 401, the relay UE 203 notifies the source UE 201 by adding the source local ID and / or destination local ID to the "Direct communication accept." Note that the specific content of the above-mentioned PC5-S signaling can refer to the prior art, and the present invention is not limited thereto.

[0065] In some implementations, the second signaling is PC5-RRC signaling, for example, the second signaling is signaling of the RRC layer on the PC5 interface.

[0066] In some implementations, the second signaling includes at least one of the following signaling: Sidelink RRC reconfiguration information (RRCReconfigurationSidelink); Sidelink RRC reconfiguration complete information (RRCReconfigurationCompleteSidelink); Sidelink UE capability inquiry information (UECapacityEnquirySidelink); Sidelink UE capability information (UECapacityInformationSidelink); SidelinkMasterInformationBlock(MasterInformationBlockSidelink); Sidelink UE assistance information (UEAssistanceInformationSidelink); Sidelink Remote UE Information (RemoteUEInformationSidelink); and This is a sidelink notification message (NotificationMessageSidelink).

[0067] For example, in step 401, the relay UE 203 notifies the source UE 201 by adding the source local ID and / or the destination local ID to the "sidelink RRC reconfiguration complete message (RRCReconfigurationCompleteSidelink)." Note that the specific content of the above-mentioned PC5-RRC signaling can refer to the prior art, and the present invention is not limited thereto.

[0068] As a result, the first terminal device, the second terminal device and the third terminal device can determine the signature information required by the adaptation layer to perform accurate data transmission.

[0069] The allocation of the first terminal device will be described below by way of an example.

[0070] In some implementations, the first terminal device assigning the first identification information of the first terminal device and / or the first identification information of the second terminal device includes the third terminal device receiving the first identification information of the first terminal device and / or the first identification information of the second terminal device and the second identification information of the second terminal device sent by the first terminal device; and the third terminal device transmitting the first identification information of the first terminal device and / or the first identification information of the second terminal device to the second terminal device.

[0071] FIG. 5 is a diagram illustrating an example in which a first terminal device assigns first identification information of the first terminal device and / or first identification information of a second terminal device in an embodiment of the present invention.

[0072] As shown in Figure 5, the first terminal device includes a source UE 201, the second terminal device includes a destination UE 202, and the third terminal device includes a U2U relay UE 203, and the first identification information of the first terminal device includes a source local ID, the first identification information of the second terminal device includes a destination local ID, the second identification information of the first terminal device includes a source L2 ID, and the second identification information of the second terminal device includes a destination L2 ID.

[0073] For example, the first terminal device assigning the first identification information of the first terminal device and / or the first identification information of the second terminal device includes the following steps: 501: The source UE 201 sends a Source local ID and / or a Destination local ID and a Destination L2 ID to the relay UE 203; and 502: The relay UE 203 sends the Source local ID and / or Destination local ID to the destination UE 202.

[0074] For example, the source UE 201 transmits a Source local ID, a Destination local ID, and a Destination L2 ID to the relay UE 203, and the relay UE 203 transmits the Source local ID to the destination UE 202. Alternatively, for example, the source UE 201 transmits a Source local ID, a Destination local ID, and a Destination L2 ID to the relay UE 203, and the relay UE 203 transmits the Source local ID and the Destination local ID to the destination UE 202. Note that, for example, the combinations of other contents transmitted in step 501 and step 502 are similar to the above examples, and therefore, a comprehensive listing will be omitted here.

[0075] The correspondence between the first sign information and the second sign information will be described below.

[0076] In some embodiments, the relay UE 203 receives the Source local ID and derives the Source L2 ID based on the MAC PDU header containing the Source local ID and the Sidelink control information (SCI) indicating the Physical sidelink shared channel (PSSCH) in which the MAC PDU is located.

[0077] In some embodiments, the source UE 201 may further send a Source L2 ID to the relay UE 203 in step 501 (not shown in FIG. 5 ). For example, the source UE 201 may send both the Source local ID and the Source L2 ID (and / or the Destination local ID and the Destination L2 ID) to the relay UE 203, so that the relay UE 203 can obtain the Source L2 ID.

[0078] In some embodiments, the relay UE 203 sends the Source L2 ID and / or Destination L2 ID to the destination UE 202 in step 502 (not shown in FIG. 5), for example, the relay UE 203 sends both the Source local ID and the Source L2 ID (and / or the Destination local ID) to the destination UE 202.

[0079] In some embodiments, the relay UE 203 and / or the source UE 201 and / or the destination UE 202 store a correspondence between a source local ID and a source L2 ID, and / or a correspondence between a destination local ID and a destination L2 ID, so that the source UE 201 and the corresponding destination UE 202 can all be determined by the allocation of the source UE 201, and data can be transmitted and received among the source UE, relay UE, and destination UE.

[0080] For example, the present invention does not limit the order of steps 501 and 502, and the order is the same as the example of the order of steps 401 and 402 described above, so a detailed description thereof will be omitted here.

[0081] Also, for example, the specific contents of the first signaling and the second signaling in FIG. 5 can be referred to the above description of the embodiment of the present invention, and detailed description thereof will be omitted here.

[0082] In some implementations, the first terminal device assigning the first identification information of the first terminal device and / or the first identification information of the second terminal device includes receiving the first identification information of the first terminal device and / or the first identification information of the second terminal device and the second identification information of the second terminal device sent by the first terminal device, wherein the first terminal device further sends the first identification information of the first terminal device and / or the first identification information of the second terminal device to the second terminal device.

[0083] FIG. 6 is a diagram illustrating another example in which a first terminal device assigns first identification information of the first terminal device and / or first identification information of a second terminal device in an embodiment of the present invention.

[0084] As shown in Figure 6, the first terminal device includes a source UE201, the second terminal device includes a destination UE202, and the third terminal device includes a U2U relay UE203, and the first identification information of the first terminal device includes a local ID (Source local ID) of the source UE201, the first identification information of the second terminal device includes a local ID (Destination local ID) of the destination UE202, the second identification information of the first terminal device includes an L2 ID (Source L2 ID) of the source UE201, and the second identification information of the second terminal device includes an L2 ID (Destination L2 ID) of the destination UE202.

[0085] For example, the first terminal device assigning the first identification information of the first terminal device and / or the first identification information of the second terminal device includes the following steps: 601: A source UE (201) sends a source local ID and / or a destination local ID and a destination L2 ID to a relay UE (203); and 602: The source UE 201 sends a source local ID and / or a destination local ID to the destination UE 202.

[0086] For example, the source UE 201 transmits a Source local ID, a Destination local ID, and a Destination L2 ID to the relay UE 203, and the source UE 201 transmits the Source local ID to the destination UE 202. Alternatively, for example, the source UE 201 transmits a Source local ID, a Destination local ID, and a Destination L2 ID to the relay UE 203, and the source UE 201 transmits the Source local ID and the Destination local ID to the destination UE 202. Note that, for example, the combinations of other contents transmitted in step 601 and step 602 are similar to the above examples, and therefore, a comprehensive listing will be omitted here.

[0087] In some embodiments, the relay UE 203 receives the Source local ID in step 601 and obtains the Source L2 ID based on the header of the MAC PDU in which the Source local ID is located and the SCI indicating the PSSCH in which the MAC PDU is located.

[0088] In some embodiments, the source UE 201 may further send a Source L2 ID to the relay UE 203 in step 601 (not shown in FIG. 6 ). For example, the source UE 201 may send both the Source local ID and the Source L2 ID (and / or the Destination local ID and the Destination L2 ID) to the relay UE 203, so that the relay UE 203 can obtain the Source L2 ID.

[0089] In some embodiments, the destination UE 202 receives the Source local ID of the source UE 201 transmission in step 602 (not shown in FIG. 6) and obtains the Source L2 ID based on the header of the MAC PDU in which the Source local ID is located and the SCI indicating the PSSCH in which the MAC PDU is located.

[0090] In some embodiments, source UE 201 may further transmit a Source L2 ID to destination UE 202 in step 602 (not shown in FIG. 6). For example, source UE 201 may transmit both a Source local ID and a Source L2 ID (and / or a Destination local ID and a Destination L2 ID) to destination UE 202, thereby allowing destination UE 202 to obtain the Source L2 ID.

[0091] In some embodiments, the relay UE 203 and / or the source UE 201 and / or the destination UE 202 store a correspondence between a Source local ID and a Source L2 ID, and / or store a correspondence between a Destination local ID and a Destination L2 ID.

[0092] In this way, through the allocation of the source UE 201, the source UE 201 and the corresponding destination UE 202 can all be determined between the source UE, the relay UE and the destination UE, so that data can be transmitted and received between the source UE, the relay UE and the destination UE.

[0093] For example, the present invention does not limit the order of steps 601 and 602, and the order is the same as the example of the order of steps 401 and 402 described above, so a detailed description thereof will be omitted here.

[0094] Also, for example, the specific contents of the first signaling and second signaling in FIG. 6 can be referred to the above description of the embodiment of the present invention, and detailed description thereof will be omitted here.

[0095] The allocation of the second terminal device will be described below as an example.

[0096] In some implementations, the second terminal device assigning the first identification information of the first terminal device and / or the first identification information of the second terminal device includes the third terminal device receiving the first identification information of the second terminal device and / or the first identification information of the first terminal device and the second identification information of the first terminal device sent by the second terminal device; and the third terminal device transmitting the first identification information of the second terminal device and / or the first identification information of the first terminal device to the first terminal device.

[0097] FIG. 7 is a diagram illustrating an example in which a second terminal device assigns first identification information of the first terminal device and / or first identification information of the second terminal device in an embodiment of the present invention.

[0098] As shown in Figure 7, the first terminal device includes a source UE201, the second terminal device includes a destination UE202, and the third terminal device includes a U2U relay UE203, and the first identification information of the first terminal device includes a local ID (Source local ID) of the source UE201, the first identification information of the second terminal device includes a local ID (Destination local ID) of the destination UE202, the second identification information of the first terminal device includes an L2 ID (Source L2 ID) of the source UE201, and the second identification information of the second terminal device includes an L2 ID (Destination L2 ID) of the destination UE202.

[0099] For example, the second terminal device assigning the first identification information of the first terminal device and / or the first identification information of the second terminal device includes the following steps: 701: A destination UE (202) sends a destination local ID and / or a source local ID and a source L2 ID to a relay UE (203); and 702: The relay UE 203 sends the Destination local ID and / or Source local ID to the source UE 201.

[0100] For example, the destination UE 202 transmits a Destination local ID, a Source local ID, and a Source L2 ID to the relay UE 203, and the relay UE 203 transmits the Destination local ID to the source UE 201. Alternatively, for example, the destination UE 202 transmits a Destination local ID, a Source local ID, and a Source L2 ID to the relay UE 203, and the relay UE 203 transmits the Destination local ID and the Source local ID to the source UE 201. Note that, for example, the combinations of other contents transmitted in step 701 and step 702 are similar to the above examples, and therefore, a comprehensive listing will be omitted here.

[0101] In some embodiments, the relay UE 203 receives the Destination local ID and obtains the Destination L2 ID based on the header of the MAC PDU in which the Destination local ID is located and the SCI indicating the PSSCH in which the MAC PDU is located.

[0102] In some embodiments, the destination UE 202 may further send a Destination L2 ID to the relay UE 203 in step 701 (not shown in FIG. 7). For example, the destination UE 202 may send both the Destination local ID and the Destination L2 ID (and / or the Source local ID and the Source L2 ID) to the relay UE 203, so that the relay UE 203 can obtain the Destination L2 ID.

[0103] In some embodiments, the relay UE 203 sends the Source L2 ID and / or Destination ID to the source UE 201 in step 702 (not shown in FIG. 7). For example, the relay UE 203 sends both the Destination local ID and the Destination L2 ID (and / or the Source local ID) to the source UE 201.

[0104] In some embodiments, the relay UE 203 and / or the source UE 201 and / or the destination UE 202 store a correspondence between a Source local ID and a Source L2 ID, and / or store a correspondence between a Destination local ID and a Destination L2 ID.

[0105] In this way, by allocating the destination UE 202, the source UE 201 and the corresponding destination UE 202 can all be determined among the source UE, relay UE and destination UE, so that data can be transmitted and received among the source UE, relay UE and destination UE.

[0106] For example, the present invention does not limit the order of steps 701 and 702, and the order is the same as the example of the order of steps 401 and 402 described above, so a detailed description thereof will be omitted here.

[0107] Also, for example, the specific contents of the first signaling and second signaling in FIG. 7 can be referred to the above description of the embodiment of the present invention, and detailed description thereof will be omitted here.

[0108] In some implementations, the second terminal device assigning the first identification information of the first terminal device and / or the first identification information of the second terminal device includes the third terminal device receiving the first identification information of the second terminal device and / or the first identification information of the first terminal device and the second identification information of the first terminal device sent by the second terminal device; and the second terminal device further transmitting the first identification information of the second terminal device and / or the first identification information of the first terminal device to the first terminal device.

[0109] FIG. 8 is a diagram illustrating another example in which a second terminal device assigns first identification information of a first terminal device and / or first identification information of a second terminal device in an embodiment of the present invention.

[0110] As shown in FIG. 8, the first terminal device includes a source UE 201, the second terminal device includes a destination UE 202, and the third terminal device includes a U2U relay UE 203, the first identification information of the first terminal device includes a local ID (Source local ID) of the source UE 201, the first identification information of the second terminal device includes a local ID (Destination local ID) of the destination UE 202, the second identification information of the first terminal device includes an L2 ID (Source L2 ID) of the source UE 201, and the second identification information of the second terminal device includes an L2 ID (Destination L2 ID) of the destination UE 202.

[0111] For example, the second terminal device assigning the first identification information of the first terminal device and / or the first identification information of the second terminal device includes the following steps: 801: A destination UE (202) sends a destination local ID and / or a source local ID and a source L2 ID to a relay UE (203); and 802: The destination UE 202 sends a Destination local ID and / or a Source local ID to the source UE 201.

[0112] For example, the destination UE 202 transmits a Destination local ID, a Source local ID, and a Source L2 ID to the relay UE 203, and the destination UE 202 transmits the Destination local ID to the source UE 201. Alternatively, for example, the destination UE 202 transmits a Destination local ID, a Source local ID, and a Source L2 ID to the relay UE 203, and the destination UE 202 transmits the Destination local ID and the Source local ID to the source UE 201. Note that, for example, the combinations of other contents transmitted in step 801 and step 802 are similar to the above examples, and therefore, a comprehensive listing will be omitted here.

[0113] In some embodiments, the relay UE 203 receives the Destination local ID in step 801 and obtains the Destination L2 ID based on the header of the MAC PDU in which the Destination local ID is located and the SCI indicating the PSSCH in which the MAC PDU is located.

[0114] In some embodiments, the destination UE 202 may further send a Destination L2 ID to the relay UE 203 in step 801 (not shown in FIG. 8 ). For example, the destination UE 202 may send both the Destination local ID and the Destination L2 ID (and / or the Source local ID and the Source L2 ID) to the relay UE 203, so that the relay UE 203 can obtain the Destination L2 ID.

[0115] For example, in step 802, the source UE 201 receives the Destination local ID of the destination UE 202 transmission (not shown in FIG. 8), and obtains the Destination L2 ID based on the header of the MAC PDU in which the Destination local ID is located and the SCI indicating the PSSCH in which the MAC PDU is located.

[0116] In some embodiments, destination UE 202 may further send a Destination L2 ID to source UE 201 in step 802 (not shown in FIG. 8). For example, destination UE 202 may send both a Destination local ID and a Destination L2 ID (and / or a Source local ID and a Source L2 ID) to source UE 201, thereby allowing source UE 201 to obtain the Destination L2 ID.

[0117] In some embodiments, the relay UE 203 and / or the source UE 201 and / or the destination UE 202 store a correspondence between a Source local ID and a Source L2 ID, and / or store a correspondence between a Destination local ID and a Destination L2 ID.

[0118] In this way, by allocating the destination UE 202, the source UE 201 and the corresponding destination UE 202 can all be determined among the source UE, relay UE and destination UE, so that data can be transmitted and received among the source UE, relay UE and destination UE.

[0119] For example, the present invention does not limit the order of steps 801 and 802, and the order is the same as the example of the order of steps 401 and 402 described above, so a detailed description thereof will be omitted here.

[0120] Also, for example, the specific contents of the first signaling and second signaling in FIG. 8 can be referred to the above description of the embodiment of the present invention, and detailed description thereof will be omitted here.

[0121] The allocation of network devices will be explained below using an example.

[0122] In some implementations, the network device assigning the first identification information of the first terminal device and / or the first identification information of the second terminal device includes the third terminal device receiving the first identification information of the first terminal device and the first identification information of the second terminal device and / or the second identification information of the first terminal device and / or the second identification information of the second terminal device sent by the network device.

[0123] FIG. 9 is a diagram illustrating an example in which a network device assigns first identification information of a first terminal device and / or first identification information of a second terminal device in an embodiment of the present invention.

[0124] For example, the network device assigning the first identification information of the first terminal device and / or the first identification information of the second terminal device includes the following steps: 901: A network device notifies a source UE 201 of a corresponding Destination local ID and / or Destination L2 ID; 902: The network device notifies the relay UE 203 of a Source local ID (and / or Source L2 ID) and a Destination local ID (and / or Destination L2 ID); and 903: The network device notifies the destination UE 202 of the corresponding Source local ID and / or Source L2 ID.

[0125] In this way, through the allocation of network equipment, the source UE 201 and the corresponding destination UE 202 can all be determined among the source UE, relay UE and destination UE, so that data can be transmitted and received among the source UE, relay UE and destination UE.

[0126] For example, the present invention does not limit the order of steps 901 to 903, and similar to the example of the order of steps 401 and 402 described above, a detailed description thereof will be omitted here.

[0127] In some implementations, the network device assigning the first identification information of the first terminal device and / or the first identification information of the second terminal device further includes the third terminal device sending the first identification information of the first terminal device and / or the second identification information of the first terminal device and / or the first identification information of the second terminal device and / or the second identification information of the second terminal device to the first terminal device; and / or the third terminal device sending the first identification information of the first terminal device and / or the second identification information of the first terminal device and / or the first identification information of the second terminal device and / or the second identification information of the second terminal device to the second terminal device.

[0128] FIG. 10 is a diagram illustrating another example in which a network device assigns first identification information of a first terminal device and / or first identification information of a second terminal device in an embodiment of the present invention.

[0129] For example, the network device assigning the first identification information of the first terminal device and / or the first identification information of the second terminal device includes the following steps: 1001: A network device notifies a relay UE 203 of a Destination local ID (and / or Destination L2 ID) and a Source local ID (and / or Source L2 ID); 1002: The relay UE 203 sends a Source local ID and / or a Destination local ID to the destination UE 202; and 1003: The relay UE 203 sends the Source local ID and / or Destination local ID to the source UE 201.

[0130] In some embodiments, the relay UE 203 and / or the source UE 201 and / or the destination UE 202 store a correspondence between a source local ID and a source L2 ID, and / or a correspondence between a destination local ID and a destination L2 ID, so that the source UE 201 and the corresponding destination UE 202 can all be determined among the source UE, the relay UE, and the destination UE through the allocation of the network devices, and data can be transmitted and received among the source UE, the relay UE, and the destination UE.

[0131] For example, for a detailed explanation of steps 1002 and 1003, see steps 401-402, and a detailed explanation thereof will be omitted here.

[0132] Furthermore, for example, the present invention does not limit the order of steps 1002 and 1003, which is the same as the example of the order of steps 401 and 402 described above, and detailed description thereof will be omitted here.

[0133] In this way, through the joint allocation of the network device and the third terminal device, the source UE 201 and the corresponding destination UE 202 can all be determined among the source UE, the relay UE and the destination UE, so that data can be transmitted and received among the source UE, the relay UE and the destination UE.

[0134] The above has been explained using the example of joint allocation of a third terminal device and a network device, but similarly, joint allocation can also be performed for a first terminal device and a network device, that is, as in Figure 10, for example, Figure 9 and Figure 5 (or Figure 6) can be joined, and also, joint allocation can also be performed for a second terminal device and a network device, that is, as in Figure 10, for example, Figure 9 and Figure 7 (or Figure 8) can be joined, which is the same as described above and will not be explained in detail here.

[0135] The pre-setting will be explained below using an example.

[0136] In some implementations, presetting the first identification information of the first terminal device and / or the first identification information of the second terminal device includes determining the first identification information of the first terminal device and the first identification information of the second terminal device, and / or the second identification information of the first terminal device and / or the second identification information of the second terminal device based on the first presetting information.

[0137] For example, similar to the process in Figure 9, the network notification process in Figure 9 is all replaced with first preconfiguration information, and for example, the first terminal device, the second terminal device and the third terminal device each obtain the Destination local ID (and / or Destination L2 ID) of the destination UE 202 and the Source local ID (and / or Source L2 ID) of the source UE 201 based on the internal first preconfiguration information ("preconfig" information).

[0138] In some embodiments, the relay UE 203 and / or the source UE 201 and / or the destination UE 202 store a correspondence between a Source local ID and a Source L2 ID, and / or store a correspondence between a Destination local ID and a Destination L2 ID.

[0139] In this way, through pre-configuration, the source UE, the relay UE and the destination UE can all determine "the source UE 201 and the corresponding destination UE 202", so that data can be transmitted and received between the source UE, the relay UE and the destination UE.

[0140] In some implementations, presetting the first identification information of the first terminal device and / or the first identification information of the second terminal device further includes transmitting the first identification information of the first terminal device and / or the second identification information of the first terminal device and / or the first identification information of the second terminal device and / or the second identification information of the second terminal device to the first terminal device; and / or transmitting the first identification information of the first terminal device and / or the second identification information of the first terminal device and / or the first identification information of the second terminal device and / or the second identification information of the second terminal device to the second terminal device.

[0141] For example, similar to the process in Figure 10, the network notification process in Figure 10 is all replaced with the first preconfiguration information, for example, the third terminal device obtains the Destination local ID (and / or Destination L2 ID) of the destination UE202 and the Source local ID (and / or Source L2 ID) of the source UE201 based on the internal first preconfiguration information ("preconfig" information), and thereby, similar to steps 1002 and 1003 in Figure 10, the third terminal device sends related information to the second terminal device and the first terminal device, respectively.

[0142] In this way, through the pre-configuration and the joint configuration of the third terminal device, the source UE 201 and the corresponding destination UE 202 can all be determined among the source UE, the relay UE and the destination UE, so that data can be transmitted and received among the source UE, the relay UE and the destination UE.

[0143] The above has been explained using the example of joint allocation of a third terminal device and a network device, but similarly, joint allocation may also be performed for a first terminal device and a network device, that is, as in Figure 10, for example, Figure 9 and Figure 5 (or Figure 6) may be joined, and also joint allocation may also be performed for a second terminal device and a network device, that is, as in Figure 10, for example, Figure 9 and Figure 7 (or Figure 8) may be joined, which are similar to what has been described above and will not be explained in detail here.

[0144] When the first identification information of the first terminal device and / or the first identification information of the second terminal device are assigned and determined, and / or when the second identification information of the first terminal device and / or the second identification information of the second terminal device are determined, accurate data transmission can be performed among the first terminal device, the second terminal device, and the third terminal device. The data transmission process of steps 302 and 303 will be exemplarily described below.

[0145] In some implementations, a third terminal device receives data sent by a first terminal device, wherein the first terminal device adds first identification information of the second terminal device to the header of the adaptation layer of the data, and the third terminal device transmits the data to the second terminal device, wherein the third terminal device adds the first identification information of the first terminal device to the header of the adaptation layer of the data.

[0146] In some implementations, after receiving data transmitted by the first terminal device, the third terminal device determines the first identification information of the first terminal device based on the second identification information of the first terminal device, and / or determines the second identification information of the second terminal device based on the first identification information of the second terminal device.

[0147] FIG. 11 illustrates an example of data transmission in an embodiment of the present invention, which includes the following steps:

[0148] Step 1101: The source UE 201 sends data to the relay UE 203, where the data is the payload of an adaptation layer PDU for the relay UE 203, and the source UE 201 adds a local ID of the destination UE 202, for example, an 8-bit “00000001”, to the adaptation layer header (SRAP header or ADAPT header) of the data.

[0149] For example, in source UE 201, application layer data is transmitted to destination UE 202, and the application layer data is associated with the L2 ID of destination UE 202. When the data reaches the adaptation layer, the adaptation layer determines the local ID of destination UE 202 based on the correspondence between the L2 ID of destination UE 202, the L2 ID of destination UE 202, and the local ID of destination UE 202. Source UE 201 includes the local ID of destination UE 202 in the header of the adaptation layer. Thus, the data from source UE 201 is transmitted to relay UE 203 after passing through the adaptation layer, RLC layer, MAC layer, and physical layer. For example, the header of an SRAP PDU transmitted by source UE 201 includes the local ID of destination UE 202, and the header of a MAC PDU transmitted by source UE 201 includes the most significant 16 bits of the L2 ID of source UE 201 and the most significant 8 bits of the L2 ID of relay UE 203. The SCI indicates the least significant 8 bits of the L2 ID of source UE 201 and the least significant 16 bits of the L2 ID of relay UE 203.

[0150] Step 1102: After the relay UE 203 receives the data sent by the source UE 201, the relay UE 203 determines the local ID (Source local ID) of the source UE 201 based on the L2 ID (Source L2 ID) of the source UE 201, and / or the relay UE 203 determines the Destination L2 ID of the destination UE 202 based on the Destination local ID of the destination UE 202.

[0151] For example, the relay UE 203 receives the MAC PDU transmitted by the source UE 201, acquires the Source L2 ID based on the most significant 16 bits of the Source L2 ID included in the MAC PDU header and the least significant 8 bits of the Source L2 ID included in the SCI indicating the PSSCH where the MAC PDU is located, and determines the Source local ID based on the correspondence between the Source L2 ID and the Source local ID determined by the relay UE 203 itself or notified.Furthermore, the relay UE 203 determines the Destination L2 ID based on the Destination local ID included in the adaptation layer header and the correspondence between the Destination L2 ID and the Destination local ID determined by the relay UE 203 itself or notified.

[0152] Step 1103: When the relaying UE 203 sends the data to the destination UE 202, it adds the Source local ID of the source UE 201 to the header of the adaptation layer, and then the relaying UE 203 sends the data to the corresponding destination UE 202 according to the Destination L2 ID. For example, the relaying UE 203 uses the Destination L2 ID (e.g., the upper 8 bits in the MAC PDU header containing the Destination L2 ID and the lower 16 bits in the SCI containing the Destination L2 ID) to send to the destination UE 202 in the MAC layer and the physical layer.

[0153] Step 1104: When the destination UE 202 receives the data, it can know which source UE sent the data to it according to the Source local ID of the source UE 201 in the adaptation layer.

[0154] This allows data to be transmitted and received between the source UE, relay UE, and destination UE.

[0155] In some implementations, the third terminal device receives data sent by the first terminal device, in which the first terminal device adds first identification information of the second terminal device to the header of the adaptation layer of the data, and the third terminal device transmits data to the second terminal device, in which the third terminal device adds the first identification information of the first terminal device and the first identification information of the second terminal device to the header of the adaptation layer of the data.

[0156] For example, still taking FIG. 11 as an example, the difference from FIG. 11 is that in step 1103, "the Source local ID and Destination local ID are added to the SRAP header of the data, and the data is transmitted."

[0157] In some implementations, the third terminal device receives data sent by the first terminal device, wherein the first terminal device adds first identification information of the first terminal device and first identification information of the second terminal device to the header of the adaptation layer of the data, and the third terminal device transmits data to the second terminal device, wherein the third terminal device adds the first identification information of the first terminal device to the header of the adaptation layer of the data.

[0158] For example, still taking FIG. 11 as an example, the difference from FIG. 11 is that in step 1101, "the Source local ID and Destination local ID are added to the SRAP header of the data, and the data is transmitted."

[0159] This allows data to be transmitted and received between the source UE, relay UE, and destination UE.

[0160] In some implementations, the third terminal device receives data sent by the first terminal device, wherein the first terminal device adds first identification information of the first terminal device and first identification information of the second terminal device to the header of the adaptation layer of the data, and the third terminal device transmits data to the second terminal device, wherein the third terminal device adds first identification information of the first terminal device and first identification information of the second terminal device to the header of the adaptation layer of the data.

[0161] In some implementations, after receiving the data transmitted by the first terminal device, the third terminal device determines the second identification information of the second terminal device based on the first identification information of the second terminal device.

[0162] FIG. 12 is a diagram illustrating another example of data transmission in an embodiment of the present invention, which includes the following steps:

[0163] Step 1201: The source UE 201 sends data to the relay UE 203, where the data is the payload of an adaptation layer PDU for the relay UE 203. The source UE 201 adds a Source local ID of the source UE 201, for example, an 8-bit “00000010”, and a Destination local ID of the destination UE 202, for example, an 8-bit “00000001”, to the adaptation layer header (SRAP header or ADAPT header) of the data.

[0164] For example, in source UE 201, application layer data is transmitted to destination UE 202, and the application layer data is associated with the L2 ID of destination UE 202. When the data reaches the adaptation layer, the adaptation layer determines the local ID of destination UE 202 based on the L2 ID of destination UE 202. Source UE 201 includes the local ID of destination UE 202 and the local ID of source UE 201 in the header of the adaptation layer. As a result, the data of source UE 201 is transmitted to relay UE 203 after passing through the adaptation layer, RLC layer, MAC layer, and physical layer. For example, the header of an SRAP PDU transmitted by source UE 201 includes the local ID of destination UE 202 and the local ID of source UE 201, and the header of a MAC PDU to be transmitted includes the upper 16 bits of the L2 ID of source UE 201 and the upper 8 bits of the L2 ID of relay UE 203. The SCI indicates the lower 8 bits of the L2 ID of source UE 201 and the lower 16 bits of the L2 ID of relay UE 203.

[0165] Step 1202: After the relay UE 203 receives the data sent by the source UE 201, the relay UE 203 determines the Destination L2 ID of the destination UE 202 based on the Destination local ID of the destination UE 202.

[0166] For example, the relaying UE 203 determines the Destination L2 ID based on the Destination local ID included in the header of the adaptation layer and the correspondence between the Destination L2 ID determined by itself or notified and the Destination local ID.

[0167] Step 1203: When the relay UE 203 sends the data to the destination UE 202, it adds the Source local ID of the source UE 201 and the Destination local ID of the destination UE 202 to the header of the adaptation layer, whereby the relay UE sends the data to the corresponding destination UE 202.

[0168] For example, the relay UE 203 transmits data to the destination UE 202 using the Destination L2 ID (e.g., the upper 8 bits including the Destination L2 ID in the MAC PDU header and the lower 16 bits including the Destination L2 ID in the SCI) in the MAC layer and the physical layer.

[0169] Step 1204: When the destination UE 202 receives the data, it can know which source UE sent the data to it according to the Source local ID and Destination local ID in the adaptation layer.

[0170] This allows data to be transmitted and received between the source UE, relay UE, and destination UE.

[0171] Although the above-described embodiments are provided to exemplify the present invention, the present invention is not limited to these embodiments, and appropriate modifications can be made based on the above-described embodiments. For example, each of the above-described embodiments may be used alone, or two or more of the above-described embodiments may be used in combination.

[0172] As can be seen from the above embodiments, the present invention can determine the identification information of the first terminal device and / or the identification information of the second terminal device used in the adaptation layer of the third terminal device, and perform data transmission and reception based on the determined identification information of the first terminal device and / or the identification information of the second terminal device, thereby reducing the data transmission overhead in the adaptation layer and saving radio resources.

[0173] <Example of the second aspect> An embodiment of the present invention provides a data transmission method, which is applied to a first terminal device. The embodiment of the present invention may be implemented in combination with the embodiment of the first aspect, or may be implemented alone. Here, a description of the same content as the embodiment of the first aspect will be omitted.

[0174] FIG. 13 is a schematic diagram of a data transmission method according to an embodiment of the present invention. As shown in FIG. 13, the method includes the following steps (operations): 1301: determining first signature information of the first terminal device and / or first signature information of the second terminal device in an adaptation layer of the first terminal device; and 1302: Transmit data to a third terminal device based on the first identification information of the first terminal device and / or the first identification information of the second terminal device and / or the second identification information of the first terminal device and / or the second identification information of the second terminal device.

[0175] This allows the identification information of the first terminal device and / or the identification information of the second terminal device to be determined to be used in the adaptation layer of the first terminal device, and data transmission and reception can be performed based on the determined identification information of the first terminal device and / or the identification information of the second terminal device, thereby reducing the data transmission overhead in the adaptation layer and saving radio resources.

[0176] Note that, although the above-mentioned FIG. 13 is used to exemplify an embodiment of the present invention, the present invention is not limited thereto. For example, the execution order of each operation may be appropriately adjusted, or some operations may be appropriately increased or decreased. Those skilled in the art may make appropriate modifications based on the above content without being limited to the description of the above-mentioned FIG. 13.

[0177] In some implementations, the first identification information of the first terminal device and / or the first identification information of the second terminal device is determined based on at least one of the following assignments: assignment of the first terminal device, assignment of the second terminal device, assignment of the third terminal device, and assignment of the network device, or pre-setting.

[0178] In some implementations, the first terminal device sends the data to the third terminal device, where the first identification information of the second terminal device is added to the header of the adaptation layer of the data; and the third terminal device sends the data to the second terminal device, where the third terminal device adds the first identification information of the first terminal device to the header of the adaptation layer of the data.

[0179] In some implementations, the first terminal device sends the data to the third terminal device, whereby the first identification information of the second terminal device is added to the header of the adaptation layer of the data; and the third terminal device sends the data to the second terminal device, whereby the third terminal device adds the first identification information of the first terminal device and the first identification information of the second terminal device to the header of the adaptation layer of the data.

[0180] In some implementations, the first terminal device sends the data to the third terminal device, where the first identification information of the first terminal device and the first identification information of the second terminal device are added to the header of the adaptation layer of the data; and the third terminal device sends the data to the second terminal device, where the third terminal device adds the first identification information of the first terminal device to the header of the adaptation layer of the data.

[0181] In some implementations, the first terminal device sends the data to the third terminal device, where the first identification information of the first terminal device and the first identification information of the second terminal device are added to the header of the adaptation layer of the data; and the third terminal device sends the data to the second terminal device, where the third terminal device adds the first identification information of the first terminal device and the first identification information of the second terminal device to the header of the adaptation layer of the data.

[0182] For example, the first identification information of the first terminal device and / or the first identification information of the second terminal device is determined based on the allocation method in the embodiment of the first aspect (e.g., the description in Figures 4-10, etc.); and the data transmission method between the first terminal device, the second terminal device and the third terminal device is determined based on the data transmission and forwarding method in the embodiment of the first aspect (e.g., the description in Figures 11-12, etc.), and detailed explanations thereof are omitted here.

[0183] Although the above-described embodiments are provided to exemplify the present invention, the present invention is not limited to these embodiments, and appropriate modifications can be made based on the above-described embodiments. For example, each of the above-described embodiments may be used alone, or two or more of the above-described embodiments may be used in combination.

[0184] As can be seen from the above embodiments, the present invention can determine the identification information of the first terminal device and / or the identification information of the second terminal device used in the adaptation layer of the first terminal device, and perform data transmission and reception based on the determined identification information of the first terminal device and / or the identification information of the second terminal device, thereby reducing the data transmission overhead in the adaptation layer and saving radio resources.

[0185] <Example of the third aspect> In an embodiment of the present invention, a data receiving method is provided, which is applied to a second terminal device. The embodiment of the present invention may be implemented in combination with the embodiment of the first aspect or the embodiment of the second aspect, or may be implemented alone. Note that descriptions of the same content as the embodiment of the first aspect or the embodiment of the second aspect will be omitted here.

[0186] FIG. 14 is a schematic diagram of a data receiving method according to an embodiment of the present invention. As shown in FIG. 14, the method includes the following steps (operations): 1401: determining first signature information of the first terminal device and / or first signature information of the second terminal device in an adaptation layer of the second terminal device; and 1402: Receive data from a third terminal device based on first identification information of the first terminal device and / or first identification information of the second terminal device and / or second identification information of the first terminal device and / or second identification information of the second terminal device.

[0187] This allows the identification information of the first terminal device and / or the identification information of the second terminal device to be determined to be used in the adaptation layer of the second terminal device, and data transmission and reception can be performed based on the determined identification information of the first terminal device and / or the identification information of the second terminal device, thereby reducing the data transmission overhead in the adaptation layer and saving radio resources.

[0188] Note that, although the above-described FIG. 14 is used to exemplify an embodiment of the present invention, the present invention is not limited thereto. For example, the execution order of each operation may be appropriately adjusted, or some operations may be appropriately increased or decreased. Those skilled in the art will be able to make appropriate modifications based on the above content without being limited to the description of FIG. 14.

[0189] In some implementations, the first identification information of the first terminal device and / or the first identification information of the second terminal device is determined based on at least one of the following assignments: assignment of the first terminal device, assignment of the second terminal device, assignment of the third terminal device, and assignment of the network device, or pre-setting.

[0190] In some implementations, the second terminal device receives the data sent by the third terminal device, wherein the first terminal device adds first identification information of the second terminal device to the header of the adaptation layer of the data and transmits the data to a third terminal device, and the third terminal device adds first identification information of the first terminal device to the header of the adaptation layer of the data and transmits the data.

[0191] In some implementations, the second terminal device receives the data sent by the third terminal device, wherein the first terminal device adds first identification information of the second terminal device to the header of the adaptation layer of the data and transmits the data to the third terminal device, and the third terminal device adds the first identification information of the first terminal device and the first identification information of the second terminal device to the header of the adaptation layer of the data and transmits the data.

[0192] In some implementations, the second terminal device receives the data sent by the third terminal device, wherein the first terminal device adds first identification information of the first terminal device and first identification information of the second terminal device to the header of the adaptation layer of the data, and transmits the data to the third terminal device; and the third terminal device adds the first identification information of the first terminal device to the header of the adaptation layer of the data, and transmits the data.

[0193] In some implementations, the second terminal device receives the data sent by the third terminal device, wherein the first terminal device adds first identification information of the first terminal device and first identification information of the second terminal device to the header of the adaptation layer of the data, and transmits the data to the third terminal device; and the third terminal device adds first identification information of the first terminal device and first identification information of the second terminal device to the header of the adaptation layer of the data, and transmits the data.

[0194] Although the above-described embodiments are provided to exemplify the present invention, the present invention is not limited to these embodiments, and appropriate modifications can be made based on the above-described embodiments. For example, each of the above-described embodiments may be used alone, or two or more of the above-described embodiments may be used in combination.

[0195] For example, the first identification information of the first terminal device and / or the first identification information of the second terminal device is determined based on the allocation method in the embodiment of the first aspect (e.g., the description in Figures 4-10, etc.); and the data transmission method between the first terminal device, the second terminal device and the third terminal device is determined based on the data transmission and forwarding method in the embodiment of the first aspect (e.g., the description in Figures 11-12, etc.), and detailed explanations thereof are omitted here.

[0196] As can be seen from the above embodiments, the present invention can determine the identification information of the first terminal device and / or the identification information of the second terminal device used in the adaptation layer of the second terminal device, and perform data transmission and reception based on the determined identification information of the first terminal device and / or the identification information of the second terminal device, thereby reducing the data transmission overhead in the adaptation layer and saving radio resources.

[0197] <Example of the fourth aspect> In an embodiment of the present invention, a data transmitting / receiving device is provided, which is disposed in a third terminal device. The device may be, for example, the terminal device, or one or more components or assemblies disposed in the terminal device. Note that the description of the same content as in the embodiment of the first aspect will be omitted here.

[0198] 15 is a schematic diagram of a data transceiver according to an embodiment of the present invention. As shown in FIG. 15, a data transceiver 1500 includes: A determining unit 1501: determining first signature information of a first terminal device and / or first signature information of a second terminal device in an adaptation layer of a third terminal device; A receiving unit 1502 receives data from the first terminal device; and A sending unit 1503: sends data to a second terminal device based on the first identification information of the first terminal device and / or the first identification information of the second terminal device and / or the second identification information of the first terminal device and / or the second identification information of the second terminal device.

[0199] Although the above-described embodiments are provided to exemplify the present invention, the present invention is not limited to these embodiments, and appropriate modifications can be made based on the above-described embodiments. For example, each of the above-described embodiments may be used alone, or two or more of the above-described embodiments may be used in combination.

[0200] Although the components and modules related to the present invention have been described above, the present invention is not limited to these. The data transmitting / receiving device 1500 may further include other components or modules, and reference can be made to the related art for specific details of these components or modules.

[0201] 15 shows only the connection relationships or signal directions between each component or module for convenience, but as will be understood by those skilled in the art, related technologies such as bus connections may also be employed. Each of the components or modules described above may be realized by hardware such as a processor, memory, transmitter (device), or receiver (device), and the present invention is not limited to these.

[0202] In some implementation modes, the determination unit 1501 determines the first identification information of the first terminal device and / or the first identification information of the second terminal device based on at least one of the following allocations: allocation of the first terminal device, allocation of the second terminal device, allocation of the third terminal device, and allocation of the network device, or pre-setting.

[0203] In some implementations, the determination unit 1501 further includes a first transmitting module (not shown in FIG. 15), which transmits the first identification information of the first terminal device and / or the first identification information of the second terminal device to the first terminal device; and the first transmitting module transmits the first identification information of the first terminal device and / or the first identification information of the second terminal device to the second terminal device, or the first transmitting module transmits the first identification information of the second terminal device and the second identification information of the second terminal device to the first terminal device; and / or the first transmitting module transmits the first identification information of the first terminal device and the second identification information of the first terminal device to the second terminal device.

[0204] In some implementations, the determination unit 1501 further includes a first receiving module and / or a second transmitting module (not shown in FIG. 15), and in the case of allocation of the first terminal device, the first receiving module receives the first identification information of the first terminal device and / or the first identification information of the second terminal device and the second identification information of the second terminal device from the first terminal device transmission; and the second transmitting module transmits the first identification information of the first terminal device and / or the first identification information of the second terminal device to the second terminal device, or the first receiving module receives the first identification information of the first terminal device and / or the first identification information of the second terminal device and the second identification information of the second terminal device from the first terminal device transmission, wherein the first terminal device further transmits the first identification information of the first terminal device and / or the first identification information of the second terminal device to the second terminal device.

[0205] In some implementations, the determination unit 1501 further includes a second receiving module and / or a third transmitting module (not shown in FIG. 15), and in the case of allocation of a second terminal device, the second receiving module receives the first identification information of the second terminal device and / or the first identification information of the first terminal device and the second identification information of the first terminal device from the second terminal device transmission; and the third transmitting module transmits the first identification information of the second terminal device and / or the first identification information of the first terminal device to the first terminal device, or the second receiving module receives the first identification information of the second terminal device and / or the first identification information of the first terminal device and the second identification information of the first terminal device from the second terminal device transmission, wherein the second terminal device further transmits the first identification information of the second terminal device and / or the first identification information of the first terminal device to the first terminal device.

[0206] In some implementations, the determination unit 1501 further includes a third receiving module and / or a fourth sending module (not shown in FIG. 15), and in the case of allocation of the network device, the third receiving module receives the first identification information of the first terminal device and the first identification information of the second terminal device, and / or the second identification information of the first terminal device, and / or the second identification information of the second terminal device sent by the network device; and the fourth sending module sends the first identification information of the first terminal device and / or the second identification information of the first terminal device and / or the first identification information of the second terminal device and / or the second identification information of the second terminal device to the first terminal device; and / or the fourth sending module sends the first identification information of the first terminal device and / or the second identification information of the first terminal device and / or the first identification information of the second terminal device and / or the second identification information of the second terminal device to the second terminal device.

[0207] In some implementations, the determination unit 1501 determines the first identification information of the first terminal device and the first identification information of the second terminal device, and / or the second identification information of the first terminal device and / or the second identification information of the second terminal device based on the first pre-configured information.

[0208] In some implementations, the determination unit 1501 further includes a fifth sending module (not shown in FIG. 15), which, in the case of the pre-setting, sends the first identification information of the first terminal device and / or the second identification information of the first terminal device and / or the first identification information of the second terminal device and / or the second identification information of the second terminal device to the first terminal device; and / or the fifth sending module sends the first identification information of the first terminal device and / or the second identification information of the first terminal device and / or the first identification information of the second terminal device and / or the second identification information of the second terminal device to the second terminal device.

[0209] In some implementations, the first sending module sends the first identification information of the first terminal device and / or the first identification information of the second terminal device to the first terminal device by first signaling or second signaling; and sends the first identification information of the first terminal device and / or the first identification information of the second terminal device to the second terminal device, or the first sending module sends the first identification information of the second terminal device and the second identification information of the second terminal device to the first terminal device by first signaling or second signaling; and / or sends the first identification information of the first terminal device and the second identification information of the first terminal device to the second terminal device.

[0210] In some implementations, the first signaling is PC5-S signaling, and the first signaling includes at least one of the following signaling: a direct communication request and / or a direct communication accept; a discovery message (e.g., a discovery solicitation) and / or a discovery response message (e.g., a discovery response); and other PC5-S messages.

[0211] In some implementations, the second signaling is PC5-RRC signaling, and the second signaling includes at least one of the following signaling: sidelink RRC reconfiguration information (RRCReconfigurationSidelink), sidelink RRC reconfiguration complete information (RRCReconfigurationCompleteSidelink), sidelink UE capability inquiry information (UECapacityEnquirySidelink), sidelink UE capability information (UECapacityInformationSidelink), sidelink master information block (MasterInformationBlockSidelink), sidelink UE assistance information (UEAssistanceInformationSidelink), sidelink remote UE information (RemoteUEInformationSidelink), and sidelink notification message (NotificationMessageSidelink).

[0212] In some implementations, the data transceiver 1500 further includes a first adding unit 1504, wherein the receiving unit 1502 receives data from the first terminal device, wherein the first terminal device adds first identification information of the second terminal device to the header of the adaptation layer of the data, and the first adding unit 1504 adds the first identification information of the first terminal device to the header of the adaptation layer of the data, and then the transmitting unit 1503 transmits the data to the second terminal device; or the receiving unit 1502 receives data from the first terminal device, wherein the first terminal device adds the first identification information of the second terminal device to the header of the adaptation layer of the data. the first adding unit 1504 adds the first identification information of the first terminal device and the first identification information of the second terminal device to the header of the adaptation layer of the data, and then the transmitting unit 1503 transmits the data to the second terminal device; or the receiving unit 1502 receives data from the first terminal device, wherein the first terminal device adds the first identification information of the first terminal device and the first identification information of the second terminal device to the header of the adaptation layer of the data, and then the first adding unit 1504 adds the first identification information of the first terminal device to the header of the adaptation layer of the data, and then the transmitting unit 1503 transmits the data to the second terminal device.

[0213] In some implementations, after the receiving unit 1502 receives data from the first terminal device, the determining unit 1501 further determines first identification information of the first terminal device based on the second identification information of the first terminal device, and / or determines second identification information of the second terminal device based on the first identification information of the second terminal device.

[0214] In some implementations, the data transceiver 1500 further includes a second adding unit 1505, wherein the receiving unit 1502 receives data from the first terminal device, wherein the first terminal device adds first identification information of the first terminal device and first identification information of the second terminal device to the header of the adaptation layer of the data, and after the second adding unit 1505 adds the first identification information of the first terminal device and the first identification information of the second terminal device to the header of the adaptation layer of the data, the transmitting unit 1503 transmits the data to the second terminal device.

[0215] In some implementations, after the receiving unit 1502 receives the data transmitted by the first terminal device, the determining unit 1501 further determines second identification information of the second terminal device based on the first identification information of the second terminal device.

[0216] In some implementations, the first terminal device is a source remote device, the second terminal device is a destination remote device, and the third terminal device is a relay device.

[0217] In some implementations, the first identification information is an identification of a terminal device used in an adaptation layer, and the second identification information is a Layer 2 identification (L2 ID).

[0218] For example, the first identification information of the first terminal device and / or the first identification information of the second terminal device is determined based on the allocation method in the embodiment of the first aspect (e.g., the description in Figures 4-10, etc.); and the data transmission method between the first terminal device, the second terminal device and the third terminal device is determined based on the data transmission and forwarding method in the embodiment of the first aspect (e.g., the description in Figures 11-12, etc.), and detailed explanations thereof are omitted here.

[0219] As can be seen from the above embodiments, the present invention can determine the identification information of the first terminal device and / or the identification information of the second terminal device used in the adaptation layer of the third terminal device, and perform data transmission and reception based on the determined identification information of the first terminal device and / or the identification information of the second terminal device, thereby reducing the data transmission overhead in the adaptation layer and saving radio resources.

[0220] <Example of the fifth aspect> In an embodiment of the present invention, a data transmission device is provided, which is disposed in a third terminal device. The device may be, for example, the terminal device, or one or more components or assemblies disposed in the terminal device. Here, descriptions of the same content as in the embodiment of the first aspect and the embodiment of the second aspect will be omitted.

[0221] 16 is a schematic diagram of a data transmission device according to an embodiment of the present invention. As shown in FIG. 16, the data transmission device 1600 includes: A determination unit 1601: determining first signature information of the first terminal device and / or first signature information of the second terminal device in an adaptation layer of the first terminal device; and A transmitting unit 1602: transmits data to a third terminal device based on the first identification information of the first terminal device and / or the first identification information of the second terminal device and / or the second identification information of the first terminal device and / or the second identification information of the second terminal device.

[0222] This allows the identification information of the first terminal device and / or the identification information of the second terminal device to be determined to be used in the adaptation layer of the first terminal device, and data transmission and reception can be performed based on the determined identification information of the first terminal device and / or the identification information of the second terminal device, thereby reducing the data transmission overhead in the adaptation layer and saving radio resources.

[0223] Although the above-described embodiments are provided to exemplify the present invention, the present invention is not limited to these embodiments, and appropriate modifications can be made based on the above-described embodiments. For example, each of the above-described embodiments may be used alone, or two or more of the above-described embodiments may be used in combination.

[0224] Although only the components or modules related to the present invention have been described above, the present invention is not limited to these. Data transmission device 1600 may further include other components or modules, and reference can be made to the related art for specific details of these components or modules.

[0225] 16 shows only the connection relationships or signal directions between each component or module for convenience, but as will be understood by those skilled in the art, related technologies such as bus connections may also be employed. Each of the components or modules described above may be realized by hardware such as a processor, a memory, a transmitter (device), or a receiver (device), and the present invention is not limited to these.

[0226] In some implementations, the first identification information of the first terminal device and / or the first identification information of the second terminal device is determined based on at least one of the following assignments: assignment of the first terminal device, assignment of the second terminal device, assignment of the third terminal device, and assignment of the network device, or pre-setting.

[0227] In some implementations, the transmitting unit 1602 transmits the data to the third terminal device, whereby the first identification information of the second terminal device is added to the header of the adaptation layer of the data; and the third terminal device transmits the data to the second terminal device, whereby the third terminal device adds the first identification information of the first terminal device to the header of the adaptation layer of the data.

[0228] In some implementations, the transmitting unit 1602 transmits the data to the third terminal device, whereby the first identification information of the second terminal device is added to the header of the adaptation layer of the data; and the third terminal device transmits the data to the second terminal device, whereby the third terminal device adds the first identification information of the first terminal device and the first identification information of the second terminal device to the header of the adaptation layer of the data.

[0229] In some implementations, the transmitting unit 1602 transmits the data to the third terminal device, whereby the first identification information of the first terminal device and the first identification information of the second terminal device are added to the header of the adaptation layer of the data; and the third terminal device transmits the data to the second terminal device, whereby the third terminal device adds the first identification information of the first terminal device to the header of the adaptation layer of the data.

[0230] In some implementations, the transmitting unit 1602 transmits the data to the third terminal device, whereby the first identification information of the first terminal device and the first identification information of the second terminal device are added to the header of the adaptation layer of the data; and the third terminal device transmits the data to the second terminal device, whereby the third terminal device adds the first identification information of the first terminal device and the first identification information of the second terminal device to the header of the adaptation layer of the data.

[0231] For example, the first identification information of the first terminal device and / or the first identification information of the second terminal device is determined based on the allocation method in the embodiment of the first aspect (e.g., the description in Figures 4-10, etc.); and the data transmission method between the first terminal device, the second terminal device and the third terminal device is determined based on the data transmission and forwarding method in the embodiment of the first aspect (e.g., the description in Figures 11-12, etc.), and detailed explanations thereof are omitted here.

[0232] Although the above-described embodiments are provided to exemplify the present invention, the present invention is not limited to these embodiments, and appropriate modifications can be made based on the above-described embodiments. For example, each of the above-described embodiments may be used alone, or two or more of the above-described embodiments may be used in combination.

[0233] As can be seen from the above embodiments, the present invention can determine the identification information of the first terminal device and / or the identification information of the second terminal device used in the adaptation layer of the first terminal device, and perform data transmission and reception based on the determined identification information of the first terminal device and / or the identification information of the second terminal device, thereby reducing the data transmission overhead in the adaptation layer and saving radio resources.

[0234] <Example of the sixth aspect> In an embodiment of the present invention, a data receiving device is provided, which is disposed in a second terminal device. The device may be, for example, the terminal device, or one or more components or assemblies disposed in the terminal device. Note that, in this description, descriptions of the same content as in the embodiment of the first aspect, the embodiment of the second aspect, and the embodiment of the third aspect will be omitted.

[0235] 17 is a schematic diagram of a data receiving device according to an embodiment of the present invention. As shown in FIG. 17, the data receiving device 1700 includes: A determination unit 1701: determining the first signature information of the first terminal device and / or the first signature information of the second terminal device in an adaptation layer of the second terminal device; and Receiving unit 1702: Receives data from a third terminal device based on the first identification information of the first terminal device and / or the first identification information of the second terminal device and / or the second identification information of the first terminal device and / or the second identification information of the second terminal device.

[0236] This allows the identification information of the first terminal device and / or the identification information of the second terminal device to be determined to be used in the adaptation layer of the second terminal device, and data transmission and reception can be performed based on the determined identification information of the first terminal device and / or the identification information of the second terminal device, thereby reducing the data transmission overhead in the adaptation layer and saving radio resources.

[0237] Although the above-described embodiments are provided to exemplify the present invention, the present invention is not limited to these embodiments, and appropriate modifications can be made based on the above-described embodiments. For example, each of the above-described embodiments may be used alone, or two or more of the above-described embodiments may be used in combination.

[0238] Although only the components or modules related to the present invention have been described above, the present invention is not limited to these. The data receiving device 1700 may further include other components or modules, and the specific contents of these components or modules can be found in the related art.

[0239] 17 shows only the connection relationships or signal directions between each component or module for convenience, but as will be understood by those skilled in the art, related technologies such as bus connection may also be employed. Each of the above-described components or modules may be realized by hardware such as a processor, memory, transmitter, or receiver, and the present invention is not limited to these.

[0240] In some implementations, the first identification information of the first terminal device and / or the first identification information of the second terminal device is determined based on at least one of the following assignments: assignment of the first terminal device, assignment of the second terminal device, assignment of the third terminal device, and assignment of the network device, or pre-setting.

[0241] In some implementations, the receiving unit 1702 receives the data transmitted by the third terminal device, wherein the first terminal device adds first identification information of the second terminal device to the header of the adaptation layer of the data and transmits the data to a third terminal device; and the third terminal device adds first identification information of the first terminal device to the header of the adaptation layer of the data and transmits the data.

[0242] In some implementations, the receiving unit 1702 receives the data sent by the third terminal device, wherein the first terminal device adds first identification information of the second terminal device to the header of the adaptation layer of the data and transmits the data to the third terminal device; and the third terminal device adds the first identification information of the first terminal device and the first identification information of the second terminal device to the header of the adaptation layer of the data and transmits the data.

[0243] In some implementations, the receiving unit 1702 receives the data sent by the third terminal device, wherein the first terminal device adds first identification information of the first terminal device and first identification information of the second terminal device to the header of the adaptation layer of the data, and transmits the data to the third terminal device; and the third terminal device adds the first identification information of the first terminal device to the header of the adaptation layer of the data, and transmits the data.

[0244] In some implementations, the receiving unit 1702 receives the data sent by the third terminal device, wherein the first terminal device adds first identification information of the first terminal device and first identification information of the second terminal device to the header of the adaptation layer of the data, and transmits the data to the third terminal device; and the third terminal device adds first identification information of the first terminal device and first identification information of the second terminal device to the header of the adaptation layer of the data, and transmits the data.

[0245] Although the above-described embodiments are provided to exemplify the present invention, the present invention is not limited to these embodiments, and appropriate modifications can be made based on the above-described embodiments. For example, each of the above-described embodiments may be used alone, or two or more of the above-described embodiments may be used in combination.

[0246] For example, the first identification information of the first terminal device and / or the first identification information of the second terminal device is determined based on the allocation method in the embodiment of the first aspect (e.g., the description in Figures 4-10, etc.); and the data transmission method between the first terminal device, the second terminal device and the third terminal device is determined based on the data transmission and forwarding method in the embodiment of the first aspect (e.g., the description in Figures 11-12, etc.), and detailed explanations thereof are omitted here.

[0247] As can be seen from the above embodiments, the present invention can determine the identification information of the first terminal device and / or the identification information of the second terminal device used in the adaptation layer of the second terminal device, and perform data transmission and reception based on the determined identification information of the first terminal device and / or the identification information of the second terminal device, thereby reducing the data transmission overhead in the adaptation layer and saving radio resources.

[0248] <Example of the seventh aspect> A communication system is further provided in the embodiment of the present invention, and description of the same content as in the embodiments of the first to sixth aspects will be omitted here.

[0249] In some embodiments, the communication system includes at least: First terminal device: determining the first identification information of the first terminal device and / or the first identification information of the second terminal device in the adaptation layer, and sending data to the third terminal device; A third terminal device receives the data from the first terminal device, and the third terminal device determines the first identification information of the first terminal device and / or the first identification information of the second terminal device in an adaptation layer; and the third terminal device transmits data to the second terminal device based on the first identification information of the first terminal device and / or the first identification information of the second terminal device and / or the second identification information of the first terminal device and / or the second identification information of the second terminal device; and Second terminal device: Determine the first identification information of the first terminal device and / or the first identification information of the second terminal device in the adaptation layer; and receive data from the third terminal device based on the first identification information of the first terminal device and / or the first identification information of the second terminal device and / or the second identification information of the first terminal device and / or the second identification information of the second terminal device.

[0250] In the embodiment of the present invention, a network device is further provided, which may be, for example, a base station, but the present invention is not limited thereto and may also be other network devices.

[0251] 18 is a block diagram of a network device according to an embodiment of the present invention. As shown in FIG. 18, the network device 1800 may include a processor 1810 (e.g., a central processing unit (CPU)) and a memory 1820, which is connected to the processor 1810. The memory 1820 can store various data and can further include a program 1830 for information processing, which can be executed under the control of the processor 1810.

[0252] 18, the network device 1800 further includes a transceiver (device) 1840, an antenna 1850, etc., among which the functions of the above-mentioned components are the same as those of the prior art, and detailed description thereof will be omitted here. Note that the network device 1800 does not need to include all the components shown in Fig. 18. The network device 1800 may also include components not shown in Fig. 18, but reference can be made to the prior art for this information.

[0253] Although the embodiment of the present invention further provides a terminal device, the present invention is not limited thereto and may further include other devices.

[0254] 19 is a schematic diagram of a terminal device according to an embodiment of the present invention. As shown in FIG. 19, the terminal device 1900 may include a processor 1910 and a memory 1920, where the memory 1920 stores data and programs and is connected to the processor 1910. Note that this diagram is merely an example, and other types of structures may be used to supplement or replace the structures to achieve telecommunications or other functions.

[0255] For example, the processor 1910 may be configured to execute a program to implement the data transmission and reception method described in the embodiment of the first aspect. For example, the processor 1910 may be configured to perform the following control: determining first identification information of the first terminal device and / or first identification information of the second terminal device in an adaptation layer of the third terminal device; receiving data from the first terminal device; and transmitting data to the second terminal device based on the first identification information of the first terminal device and / or first identification information of the second terminal device and / or second identification information of the first terminal device and / or second identification information of the second terminal device.

[0256] As shown in Fig. 19, the terminal device 1900 may further include a communication module 1930, an input unit 1940, a display 1950, a power supply 1960, etc. The functions of the above-mentioned components are the same as those of the prior art, and detailed descriptions thereof will be omitted here. Note that the terminal device 1900 does not need to include all of the components shown in Fig. 19, i.e., the above-mentioned components are not essential. Furthermore, the terminal device 1900 may further include components not shown in Fig. 19, and reference can be made to the prior art for such components.

[0257] An embodiment of the present invention further provides a computer program, which, when executed by a terminal device, causes the terminal device to perform the data transmission and reception method described in the embodiment of the first aspect.

[0258] An embodiment of the present invention further provides a storage medium storing a computer program, wherein the computer program causes a terminal device to perform the data transmission and reception method described in the embodiment of the first aspect.

[0259] An embodiment of the present invention further provides a computer program, which, when executed by a terminal device, causes the terminal device to perform the data transmission method described in the embodiment of the second aspect.

[0260] An embodiment of the present invention further provides a storage medium storing a computer program, wherein the computer program causes a terminal device to perform the data transmission method described in the embodiment of the second aspect.

[0261] An embodiment of the present invention further provides a computer program, which, when executed by a terminal device, causes the terminal device to perform the data receiving method according to the embodiment of the third aspect.

[0262] An embodiment of the present invention further provides a storage medium storing a computer program, wherein the computer program causes a terminal device to perform the data receiving method according to the embodiment of the third aspect.

[0263] The above-described apparatus and methods may be realized by software or hardware, or by a combination of hardware and software. The present invention also relates to a computer-readable program as described below, which, when executed by a logic component, causes the logic component to realize the above-described apparatus or component, or to perform each of the above-described methods or steps. The logic component may be, for example, an FPGA (Field Programmable Gate Array), a microprocessor, or a processing unit used in a computer. The present invention also relates to a storage medium, such as a hard disk, magnetic disk, optical hard disk, DVD, or flash memory, that stores the above-described program.

[0264] Furthermore, one or more combinations of the functional blocks illustrated in the figures and / or one or more combinations of the functional blocks may be implemented as a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic component, a discrete gate or transistor logic component, a discrete hardware assembly, or any other suitable combination for performing the functions described herein. Also, one or more combinations of the functional blocks illustrated in the figures and / or one or more combinations of the functional blocks may be further implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors communicatively coupled with a DSP, or any other configuration.

[0265] Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and any modifications to the present invention that do not depart from the spirit of the present invention fall within the technical scope of the present invention.

[0266] Furthermore, with respect to the above-mentioned embodiments, the following supplementary notes are disclosed.

[0267] (Appendix 1) A data transmission and reception method applied to a third terminal device, the method comprising: determining first identification information of the first terminal device and / or first identification information of the second terminal device in an adaptation layer of the third terminal device; receiving data from the first terminal device; and transmitting data to the second terminal device based on first identification information of the first terminal device and / or first identification information of the second terminal device and / or second identification information of the first terminal device and / or second identification information of the second terminal device.

[0268] (Appendix 2) 2. The method of claim 1, comprising: The first identification information of the first terminal device and / or the first identification information of the second terminal device is determined based on at least one of the following assignments: assignment of the first terminal device, assignment of the second terminal device, assignment of the third terminal device, and assignment of the network device, or pre-setting.

[0269] (Appendix 3) 10. The method of claim 2, The third terminal device assigning the first identification information of the first terminal device and / or the first identification information of the second terminal device, Sending the first identification information of the first terminal device and / or the first identification information of the second terminal device to the first terminal device; and transmitting the first identification information of the first terminal device and / or the first identification information of the second terminal device to the second terminal device.

[0270] (Appendix 4) 10. The method of claim 2, The third terminal device assigning the first identification information of the first terminal device and / or the first identification information of the second terminal device, Sending first identification information of the second terminal device and second identification information of the second terminal device to the first terminal device; and / or transmitting first identification information of the first terminal device and second identification information of the first terminal device to a second terminal device.

[0271] (Appendix 5) 10. The method of claim 2, The first terminal device assigning the first identification information of the first terminal device and / or the first identification information of the second terminal device includes: receiving first identification information of the first terminal device transmitted by the first terminal device, and / or receiving first identification information of the second terminal device and second identification information of the second terminal device; and transmitting first identification information of the first terminal device and / or first identification information of the second terminal device to the second terminal device.

[0272] (Appendix 6) 10. The method of claim 2, The first terminal device assigning the first identification information of the first terminal device and / or the first identification information of the second terminal device includes: receiving the first identification information of the first terminal device transmitted by the first terminal device, and / or the first identification information of the second terminal device and the second identification information of the second terminal device; and The first terminal device further includes transmitting the first identification information of the first terminal device and / or the first identification information of the second terminal device to the second terminal device.

[0273] (Appendix 7) 10. The method of claim 2, The second terminal device assigning the first identification information of the first terminal device and / or the first identification information of the second terminal device, receiving the first identification information of the second terminal device transmitted by the second terminal device, and / or the first identification information of the first terminal device and the second identification information of the first terminal device; and transmitting first identification information of the second terminal device and / or first identification information of the first terminal device to the first terminal device.

[0274] (Appendix 8) 10. The method of claim 2, The second terminal device assigning the first identification information of the first terminal device and / or the first identification information of the second terminal device, receiving the first identification information of the second terminal device transmitted by the second terminal device, and / or the first identification information of the first terminal device and the second identification information of the first terminal device; and The second terminal device transmitting first identification information of the second terminal device and / or first identification information of the first terminal device to the first terminal device.

[0275] (Appendix 9) 10. The method of claim 2, The network device assigning the first identification information of the first terminal device and / or the first identification information of the second terminal device includes: The method includes receiving the first identification information of the first terminal device and the first identification information of the second terminal device transmitted by the network device, and / or the second identification information of the first terminal device and / or the second identification information of the second terminal device.

[0276] (Appendix 10) 10. The method of claim 9, The network device further assigning the first identification information of the first terminal device and / or the first identification information of the second terminal device includes: Sending the first identification information of the first terminal device and / or the second identification information of the first terminal device and / or the first identification information of the second terminal device and / or the second identification information of the second terminal device to the first terminal device; and / or transmitting first identification information of the first terminal device and / or second identification information of the first terminal device and / or first identification information of the second terminal device and / or second identification information of the second terminal device to the second terminal device.

[0277] (Appendix 11) 10. The method of claim 2, Presetting the first identification information of the first terminal device and / or the first identification information of the second terminal device includes: determining first identification information of the first terminal device and first identification information of the second terminal device, and / or second identification information of the first terminal device and / or second identification information of the second terminal device based on first preset information.

[0278] (Appendix 12) 12. The method of claim 11, Presetting the first identification information of the first terminal device and / or the first identification information of the second terminal device further includes: Sending the first identification information of the first terminal device and / or the second identification information of the first terminal device and / or the first identification information of the second terminal device and / or the second identification information of the second terminal device to the first terminal device; and / or transmitting first identification information of the first terminal device and / or second identification information of the first terminal device and / or first identification information of the second terminal device and / or second identification information of the second terminal device to the second terminal device.

[0279] (Appendix 13) The method according to any one of appendices 1-10, further comprising: transmitting first identification information of the first terminal device and / or second identification information of the first terminal device and / or first identification information of the second terminal device and / or second identification information of the second terminal device to the first terminal device and / or the second terminal device by first signaling or second signaling.

[0280] (Appendix 14) 14. The method of claim 13, The first signaling is PC5-S signaling, and the first signaling includes at least one of the following signaling: Direct communication request and / or Direct communication accept; discovery messages (e.g., discovery solicitations) and / or discovery response messages (e.g., discovery responses); and Other PC5-S messages are ones.

[0281] (Appendix 15) 14. The method of claim 13, The second signaling is PC5-RRC signaling, and the second signaling includes at least one of the following signaling: Sidelink RRC reconfiguration information (RRCReconfigurationSidelink), Sidelink RRC reconfiguration complete information (RRCReconfigurationCompleteSidelink), Sidelink UE capability inquiry information (UECapacityEnquirySidelink), Sidelink UE capability information (UECapacityInformationSidelink), Sidelink Master Information Block (MasterInformationBlockSidelink), Sidelink UE assistance information (UEAssistanceInformationSidelink), Sidelink Remote UE Information (RemoteUEInformationSidelink), and This is a sidelink notification message (NotificationMessageSidelink).

[0282] (Appendix 16) 2. The method of claim 1, comprising: Receiving data from the first terminal device and / or transmitting data to the second terminal device based on first identification information of the first terminal device and / or first identification information of the second terminal device and / or second identification information of the first terminal device and / or second identification information of the second terminal device, receiving data transmitted by the first terminal device, wherein the first terminal device adds first identification information of the second terminal device to a header of an adaptation layer of the data; and Sending the data to the second terminal device, including adding first identification information of the first terminal device to a header of an adaptation layer of the data.

[0283] (Appendix 17) 2. The method of claim 1, comprising: Receiving data from the first terminal device and / or transmitting data to the second terminal device based on first identification information of the first terminal device and / or first identification information of the second terminal device and / or second identification information of the first terminal device and / or second identification information of the second terminal device, receiving data transmitted by the first terminal device, wherein the first terminal device adds first identification information of the second terminal device to a header of an adaptation layer of the data; and Sending the data to the second terminal device, including adding first identification information of the first terminal device and first identification information of the second terminal device to a header of an adaptation layer of the data.

[0284] (Appendix 18) 2. The method of claim 1, comprising: Receiving data from the first terminal device and / or transmitting data to the second terminal device based on first identification information of the first terminal device and / or first identification information of the second terminal device and / or second identification information of the first terminal device and / or second identification information of the second terminal device, receiving data transmitted by the first terminal device, wherein the first terminal device adds first identification information of the first terminal device and first identification information of the second terminal device to an adaptation layer header of the data; and Sending the data to the second terminal device, including adding first identification information of the first terminal device to a header of an adaptation layer of the data.

[0285] (Appendix 19) 19. The method of any one of claims 16-18, further comprising: After receiving the data transmitted by the first terminal device, determining first identification information of the first terminal device based on second identification information of the first terminal device, and / or determining second identification information of the second terminal device based on the first identification information of the second terminal device.

[0286] (Appendix 20) 2. The method of claim 1, comprising: Receiving data from the first terminal device and / or transmitting data to the second terminal device based on first identification information of the first terminal device and / or first identification information of the second terminal device and / or second identification information of the first terminal device and / or second identification information of the second terminal device, receiving data transmitted by the first terminal device, wherein the first terminal device adds first identification information of the first terminal device and first identification information of the second terminal device to an adaptation layer header of the data; and Sending the data to the second terminal device, including adding first identification information of the first terminal device and first identification information of the second terminal device to a header of an adaptation layer of the data.

[0287] (Appendix 21) 21. The method of claim 20, further comprising: determining second identification information of the second terminal device based on first identification information of the second terminal device after receiving data transmitted by the first terminal device.

[0288] (Appendix 22) 22. The method according to any one of claims 1-21, comprising: The first terminal device is a source remote device, the second terminal device is a destination remote device, and the third terminal device is a relay device.

[0289] (Appendix 23) 23. The method according to any one of claims 1-22, comprising: The first identification information is an identification of a terminal device used in an adaptation layer, and the second identification information is a layer 2 identification (L2 ID).

[0290] (Appendix 24) 1. A data transmission method applied to a first terminal device, the method comprising: Determining first identification information of the first terminal device and / or first identification information of the second terminal device in an adaptation layer of the first terminal device; and transmitting data to a third terminal device based on first identification information of the first terminal device and / or first identification information of the second terminal device and / or second identification information of the first terminal device and / or second identification information of the second terminal device.

[0291] (Appendix 25) 25. The method of claim 24, The first identification information of the first terminal device and / or the first identification information of the second terminal device is determined based on at least one of the following assignments: assignment of the first terminal device, assignment of the second terminal device, assignment of the third terminal device, and assignment of a network device, or pre-setting.

[0292] (Appendix 26) 25. The method of claim 24, Transmitting data based on the first identification information of the first terminal device and / or the first identification information of the second terminal device includes: Sending the data to the third terminal device, wherein adding first identification information of the second terminal device to an adaptation layer header of the data; and The third terminal device transmits the data to the second terminal device, wherein the third terminal device adds first identification information of the first terminal device to a header of an adaptation layer of the data.

[0293] (Appendix 27) 25. The method of claim 24, Transmitting data based on the first identification information of the first terminal device and / or the first identification information of the second terminal device includes: Sending the data to the third terminal device, wherein adding first identification information of the second terminal device to an adaptation layer header of the data; and The third terminal device transmits the data to the second terminal device, wherein the third terminal device adds first identification information of the first terminal device and the first identification information of the second terminal device to a header of an adaptation layer of the data.

[0294] (Appendix 28) 25. The method of claim 24, Transmitting data based on the first identification information of the first terminal device and / or the first identification information of the second terminal device includes: Send the data to the third terminal device, in which adding the first identification information of the first terminal device and the first identification information of the second terminal device to an adaptation layer header of the data; and The third terminal device transmits the data to the second terminal device, wherein the third terminal device adds first identification information of the first terminal device to a header of an adaptation layer of the data.

[0295] (Appendix 29) 25. The method of claim 24, Transmitting data that appears as first identification information of the first terminal device and / or first identification information of the second terminal device includes: Send the data to the third terminal device, in which adding first identification information of the first terminal device and first identification information of the second terminal device to an adaptation layer header of the data; and The third terminal device transmits the data to the second terminal device, wherein the third terminal device adds first identification information of the first terminal device and the first identification information of the second terminal device to a header of an adaptation layer of the data.

[0296] (Appendix 30) 1. A data receiving method applied to a second terminal device, the method comprising: Determining the first signature information of the first terminal device and / or the first signature information of the second terminal device in the adaptation layer of the second terminal device; and receiving data from the third terminal device based on first identification information of the first terminal device and / or first identification information of the second terminal device and / or second identification information of the first terminal device and / or second identification information of the second terminal device.

[0297] (Appendix 31) 31. The method of claim 30, The first identification information of the first terminal device and / or the first identification information of the second terminal device is determined based on at least one of the following assignments: assignment of the first terminal device, assignment of the second terminal device, assignment of the third terminal device, and assignment of a network device, or pre-setting.

[0298] (Appendix 32) 31. The method of claim 30, Receiving data based on the first identification information of the first terminal device and / or the first identification information of the second terminal device, receiving the data transmitted by the third terminal device; The first terminal device adds first identification information of the second terminal device to a header of an adaptation layer of the data and transmits the data to a third terminal device, and the third terminal device adds the first identification information of the first terminal device to a header of an adaptation layer of the data and transmits the data.

[0299] (Appendix 33) 31. The method of claim 30, Receiving data based on the first identification information of the first terminal device and / or the first identification information of the second terminal device, receiving the data transmitted by the third terminal device; The first terminal device adds first identification information of the second terminal device to a header of an adaptation layer of the data, and transmits the data to the third terminal device, and the third terminal device adds the first identification information of the first terminal device and the first identification information of the second terminal device to a header of an adaptation layer of the data, and transmits the data.

[0300] (Appendix 34) 31. The method of claim 30, Receiving data based on the first identification information of the first terminal device and / or the first identification information of the second terminal device, receiving the data transmitted by the third terminal device; The first terminal device adds the first identification information of the first terminal device and the first identification information of the second terminal device to a header of the adaptation layer of the data, and transmits the data to the third terminal device; and the third terminal device adds the first identification information of the first terminal device to a header of the adaptation layer of the data, and transmits the data.

[0301] (Appendix 35) 31. The method of claim 30, Transmitting data based on the first identification information of the first terminal device and / or the first identification information of the second terminal device includes: receiving the data transmitted by the third terminal device; The first terminal device adds the first identification information of the first terminal device and the first identification information of the second terminal device to a header of an adaptation layer of the data, and transmits the data to the third terminal device, and the third terminal device adds the first identification information of the first terminal device and the first identification information of the second terminal device to a header of an adaptation layer of the data, and transmits the data.

[0302] (Appendix 36) A terminal device, a memory and a processor; The storage device stores a computer program, The processor is configured to execute the computer program to implement the data transmission and reception method according to any one of Supplements 1 to 23.

[0303] (Appendix 37) A terminal device, a memory and a processor; The storage device stores a computer program, The processor is configured to execute the computer program to implement the data transmission method of any one of Supplementary Notes 24 to 29.

[0304] (Appendix 38) A terminal device, a memory and a processor, The storage device stores a computer program, The processor is configured to execute the computer program to implement the data reception method according to any one of appendices 30 to 35.

[0305] (Appendix 39) 1. A communication system comprising: a first terminal device, a second terminal device, and a third terminal device; The first terminal device determines the first identification information of the first terminal device and / or the first identification information of the second terminal device through an adaptation layer, and sends data to the third terminal device; The third terminal device receives the data from the first terminal device, the third terminal device determines the first identification information of the first terminal device and / or the first identification information of the second terminal device in an adaptation layer, and the third terminal device sends data to the second terminal device according to the first identification information of the first terminal device and / or the first identification information of the second terminal device and / or the second identification information of the first terminal device and / or the second identification information of the second terminal device; The second terminal device determines the first identification information of the first terminal device and / or the first identification information of the second terminal device in an adaptation layer, and receives data from the third terminal device based on the first identification information of the first terminal device and / or the first identification information of the second terminal device and / or the second identification information of the first terminal device and / or the second identification information of the second terminal device.

Claims

1. a data transmitting / receiving device disposed in a third terminal device, the data transmitting / receiving device comprising: a determining unit for determining first signature information of the first terminal device and / or first signature information of the second terminal device in the adaptation layer of the third terminal device; a receiving unit for receiving data from the first terminal device; and An apparatus including a transmitting unit that transmits data to the second terminal device based on first identification information of the first terminal device and / or first identification information of the second terminal device and / or second identification information of the first terminal device and / or second identification information of the second terminal device.

2. 10. The apparatus of claim 1, The determination unit determines the first identification information of the first terminal device and / or the first identification information of the second terminal device based on at least one of the following assignments: assignment of the first terminal device, assignment of the second terminal device, assignment of the third terminal device, and assignment of a network device, or pre-setting.

3. 3. The apparatus of claim 2, The determination unit further includes a first sending module; In the case of the allocation of the third terminal device, The first sending module sends the first identification information of the first terminal device and / or the first identification information of the second terminal device to the first terminal device; and the first sending module sends the first identification information of the first terminal device and / or the first identification information of the second terminal device to the second terminal device; or The first transmitting module transmits the first identification information of the second terminal device and the second identification information of the second terminal device to the first terminal device; and / or the first transmitting module transmits the first identification information of the first terminal device and the second identification information of the first terminal device to the second terminal device.

4. 3. The apparatus of claim 2, the determination unit further includes a first receiving module and / or a second transmitting module; In the case of the assignment of the first terminal device, The first receiving module receives the first identification information of the first terminal device and / or the first identification information of the second terminal device and the second identification information of the second terminal device transmitted by the first terminal device; and the second transmitting module transmits the first identification information of the first terminal device and / or the first identification information of the second terminal device to the second terminal device; or The first receiving module receives the first identification information of the first terminal device and / or the first identification information of the second terminal device and the second identification information of the second terminal device transmitted by the first terminal device, and the first terminal device further transmits the first identification information of the first terminal device and / or the first identification information of the second terminal device to the second terminal device.

5. 3. The apparatus of claim 2, the determination unit further includes a second receiving module and / or a third sending module; In the case of the allocation of the second terminal device, The second receiving module receives the first identification information of the second terminal device and / or the first identification information of the first terminal device and the second identification information of the first terminal device transmitted by the second terminal device; and the third transmitting module transmits the first identification information of the second terminal device and / or the first identification information of the first terminal device to the first terminal device; or The second receiving module receives the first identification information of the second terminal device and / or the first identification information of the first terminal device and the second identification information of the first terminal device transmitted by the second terminal device, and the second terminal device further transmits the first identification information of the second terminal device and / or the first identification information of the first terminal device to the first terminal device.

6. 3. The apparatus of claim 2, the determination unit further includes a third receiving module and / or a fourth sending module; In the case of the allocation of the network device, The third receiving module receives the first identification information of the first terminal device and the first identification information of the second terminal device, and / or the second identification information of the first terminal device and / or the second identification information of the second terminal device transmitted by the network device; and The fourth transmitting module transmits the first identification information of the first terminal device and / or the second identification information of the first terminal device and / or the first identification information of the second terminal device and / or the second identification information of the second terminal device to the first terminal device; and / or the fourth transmitting module transmits the first identification information of the first terminal device and / or the second identification information of the first terminal device and / or the first identification information of the second terminal device and / or the second identification information of the second terminal device to the second terminal device.

7. 3. The apparatus of claim 2, The determination unit determines, based on first preset information, first identification information of the first terminal device and first identification information of the second terminal device, and / or second identification information of the first terminal device and / or second identification information of the second terminal device.

8. 8. The apparatus of claim 7, the determination unit further includes a fifth sending module; In the case of said preset, the fifth sending module sends the first identification information of the first terminal device and / or the second identification information of the first terminal device and / or the first identification information of the second terminal device and / or the second identification information of the second terminal device to the first terminal device; and / or The fifth transmission module transmits the first identification information of the first terminal device and / or the second identification information of the first terminal device and / or the first identification information of the second terminal device and / or the second identification information of the second terminal device to the second terminal device.

9. 4. The apparatus of claim 3, The first sending module sends the first identification information of the first terminal device and / or the first identification information of the second terminal device to the first terminal device through first signaling or second signaling; and sends the first identification information of the first terminal device and / or the first identification information of the second terminal device to the second terminal device; or The first transmitting module transmits the first identification information of the second terminal device and the second identification information of the second terminal device to the first terminal device by first signaling or second signaling; and / or transmits the first identification information of the first terminal device and the second identification information of the first terminal device to the second terminal device.

10. 10. The apparatus of claim 9, the first signaling is PC5-S signaling; The first signaling includes at least one of the following signaling: Direct communication request and / or Direct communication accept; A discovery message (e.g., a discovery solicitation) and / or a discovery response message (e.g., a discovery response); and Another PC5-S message, Device.

11. 10. The apparatus of claim 9, the second signaling is PC5-RRC signaling; The second signaling includes at least one of the following signaling: Sidelink RRC reconfiguration information (RRCReconfigurationSidelink), Sidelink RRC reconfiguration complete information (RRCReconfigurationCompleteSidelink), Sidelink UE capability inquiry information (UECapacityEnquirySidelink), Sidelink UE capability information (UECapacityInformationSidelink), Sidelink Master Information Block (MasterInformationBlockSidelink), Sidelink UE assistance information (UEAssistanceInformationSidelink), Sidelink Remote UE Information (RemoteUEInformationSidelink), and A device that receives a sidelink notification message (NotificationMessageSidelink).

12. 10. The apparatus of claim 1, the data transceiver further includes a first additional unit; The receiving unit receives data from the first terminal device, and the first terminal device adds first identification information of the second terminal device to a header of an adaptation layer of the data; and after the first adding unit adds the first identification information of the first terminal device to a header of an adaptation layer of the data, the transmitting unit transmits the data to the second terminal device; or The receiving unit receives data from the first terminal device, and the first terminal device adds first identification information of the second terminal device to a header of an adaptation layer of the data; and the first adding unit adds the first identification information of the first terminal device and the first identification information of the second terminal device to a header of an adaptation layer of the data, and then the transmitting unit transmits the data to the second terminal device; or The receiving unit receives data from the first terminal device, and the first terminal device adds first identification information of the first terminal device and first identification information of a second terminal device to a header of an adaptation layer of the data; and after the first adding unit adds the first identification information of the first terminal device to the header of an adaptation layer of the data, the transmitting unit transmits the data to the second terminal device.

13. 13. The apparatus of claim 12, After the receiving unit receives the data from the first terminal device, The determination unit further determines first identification information of the first terminal device based on second identification information of the first terminal device, and / or determines second identification information of the second terminal device based on the first identification information of the second terminal device.

14. 10. The apparatus of claim 1, the data transceiver further includes a second additional unit; The receiving unit receives data from the first terminal device, and the first terminal device adds first identification information of the first terminal device and first identification information of the second terminal device to a header of an adaptation layer of the data; After the second adding unit adds the first identification information of the first terminal device and the first identification information of the second terminal device to the header of the adaptation layer of the data, the transmitting unit transmits the data to the second terminal device.

15. 13. The apparatus of claim 12, After the receiving unit receives the data transmitted by the first terminal device, the determining unit further determines second identification information of the second terminal device based on the first identification information of the second terminal device.

16. 10. The apparatus of claim 1, The apparatus, wherein the first terminal device is a source remote device, the second terminal device is a destination remote device, and the third terminal device is a relay device.

17. 10. The apparatus of claim 1, The first identification information is an identification of a terminal device used in an adaptation layer, and the second identification information is a layer 2 identification (L2 ID).

18. A data transmission device is disposed in a first terminal device, the data transmission device comprising: A determining unit for determining first signature information of the first terminal device and / or first signature information of the second terminal device in the adaptation layer of the first terminal device; and An apparatus including a transmitting unit that transmits data to a third terminal device based on first identification information of the first terminal device and / or first identification information of the second terminal device and / or second identification information of the first terminal device and / or second identification information of the second terminal device.

19. a data receiving device disposed in a second terminal device, the data receiving device comprising: A determination unit for determining the first signature information of the first terminal device and / or the first signature information of the second terminal device in the adaptation layer of the second terminal device; and An apparatus including a receiving unit that receives data from a third terminal device based on first identification information of the first terminal device and / or first identification information of the second terminal device and / or second identification information of the first terminal device and / or second identification information of the second terminal device.

20. 1. A communication system comprising: a first terminal device, a second terminal device, and a third terminal device; The first terminal device determines the first signature information of the first terminal device and / or the first signature information of the second terminal device through an adaptation layer, and sends data to the third terminal device; The third terminal device receives the data from the first terminal device, the third terminal device determines the first identification information of the first terminal device and / or the first identification information of the second terminal device in an adaptation layer, and the third terminal device transmits data to the second terminal device according to the first identification information of the first terminal device and / or the first identification information of the second terminal device and / or the second identification information of the first terminal device and / or the second identification information of the second terminal device; A communication system in which the second terminal device determines first identification information of the first terminal device and / or first identification information of the second terminal device in an adaptation layer, and receives data from the third terminal device based on the first identification information of the first terminal device and / or the first identification information of the second terminal device and / or the second identification information of the first terminal device and / or the second identification information of the second terminal device.

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