WO2023217024A1 - Sidelink (sl) communication method and apparatus, and terminal - Google Patents

Abstract

The present application relates to the technical field of communications. Disclosed are a sidelink (SL) communication method and apparatus, and a terminal. The SL communication method in embodiments of the present application comprises: a first terminal generates a first positioning message by means of a first protocol layer, wherein the first protocol layer is used for providing a positioning function on a PC5 interface; the first terminal submits the first positioning message generated by means of the first protocol layer to a second protocol layer, wherein the second protocol layer is adjacent to the first protocol layer, the second protocol layer comprises a packet data convergence protocol (PDCP) layer or a third protocol layer, and the third protocol layer comprises at least one of a PC5 radio resource control (RRC) layer, a PC5-S protocol layer, and PC5-D; and the first terminal sends the first positioning message to a second terminal by means of the PC-5 interface in the second protocol layer.

Description

Communication method, device and terminal of side link SL

cross reference

This invention requires the priority of a Chinese patent application submitted to the China Patent Office on May 10, 2022, with application number 202210504106. incorporated herein by reference.

Technical field

The present application belongs to the field of communication technology, and specifically relates to a communication method, device and terminal for a side link SL.

Background technique

Communication systems such as the 5th Generation New Radio (5G NR) system and the Long Term Evolution (LTE) system can support side links (Sidelink, SL, also called secondary links, Side links, etc.) transmission, that is, data transmission between user equipment (User Equipment, UE, that is, terminal) can be carried out directly on the physical layer without going through network equipment, that is, SL architecture.

Under the SL architecture, for scenarios where terminals perform location interaction through direct connection, how to interact with information between terminals is still an urgent technical issue that needs to be solved.

Contents of the invention

Embodiments of the present application provide a side link SL communication method, device and terminal, which can realize information interaction between terminals under the SL architecture.

In a first aspect, a communication method for a side link SL is provided, including: a first terminal generating a first positioning message through a first protocol layer, wherein the first protocol layer is used to provide a positioning function on the PC5 interface; The first terminal delivers the first positioning message generated by the first protocol layer to a second protocol layer, wherein the second protocol layer is adjacent to the first protocol layer, and the second protocol layer The layer includes the Packet Data Convergence Protocol (PDCP) layer or the third protocol layer. The third protocol layer includes the PC5 Radio Resource Control (Radio Resource Control, RRC) layer, PC5-S protocol layer, PC5-D At least one of: the first terminal sends the first positioning message to the second terminal through the PC-5 interface at the second protocol layer.

In a second aspect, a communication method of side link SL is provided, including: the second terminal receives the first positioning message sent by the first terminal on the PC5 interface through a second protocol layer, wherein the second protocol layer includes packets data aggregation protocol PDCP layer or a third protocol layer, the third protocol layer includes at least one of the PC5 radio resource control RRC layer, PC5-S protocol layer, and PC5-D; the second terminal uses the second protocol layer to The first positioning message is submitted to a first protocol layer, where the second protocol layer is adjacent to the first protocol layer, and the first protocol layer is used to provide positioning function on the PC5 interface.

In a third aspect, a side-link SL communication method is provided, including: the first terminal generates first positioning data at a first protocol layer, wherein the first protocol layer is used to provide a positioning function on the PC5 interface; The first terminal submits the first positioning data generated in the first protocol layer to a Vehicle to Everything (V2X) layer, where the first protocol layer is adjacent to the V2X layer ; The first terminal sends the first positioning data to the second terminal through the PC5 interface at the V2X layer.

In the fourth aspect, a communication method of the side link SL is provided, including: the second terminal receives the first positioning data sent by the first terminal through the PC5 interface at the V2X layer of the vehicle connection; the second terminal receives the first positioning data through the V2X layer. The layer delivers the first positioning data to a first protocol layer, where the first protocol layer is adjacent to the V2X layer, and the first protocol layer is used to provide positioning function on the PC5 interface.

In a fifth aspect, a communication device for a side link SL is provided, including: a first generating module configured to generate a first positioning message through a first protocol layer, wherein the first protocol layer is used to provide a first positioning message on the PC5 interface. The positioning function; the first transmission module is used to submit the first positioning message generated by the first protocol layer to the second protocol layer, wherein the second protocol layer is adjacent to the first protocol layer , the second protocol layer includes the Packet Data Convergence Protocol PDCP layer or the third protocol layer, the third protocol layer includes at least one of the PC5 Radio Resource Control RRC layer, the PC5-S protocol layer, and the PC5-D; and The first positioning message is sent to the second terminal through the PC-5 interface at the second protocol layer.

In a sixth aspect, a communication device for a side link SL is provided, including: a second transmission module for the second terminal to receive the first positioning message sent by the first terminal through the second protocol layer on the PC5 interface, wherein: The second protocol layer includes a Packet Data Convergence Protocol PDCP layer or a third protocol layer, and the third protocol layer includes at least one of the PC5 Radio Resource Control RRC layer, the PC5-S protocol layer, and the PC5-D; and through the The second protocol layer delivers the first positioning message to the first protocol layer, wherein the second protocol layer is adjacent to the first protocol layer, and the first protocol layer is used to provide GPS.

In a seventh aspect, a communication device for a side link SL is provided, including: a second generation module configured to generate first positioning data at a first protocol layer, wherein the first protocol layer is used to provide The positioning function; the third transmission module is used to submit the first positioning data generated in the first protocol layer to the V2X layer of the Internet of Vehicles, where the first protocol layer is adjacent to the V2X layer ; and sending the first positioning data to the second terminal through the PC5 interface at the V2X layer.

In an eighth aspect, a communication device for a side link SL is provided, including: a fourth transmission module configured to receive the first positioning data sent by the first terminal through the PC5 interface at the V2X layer of the connected vehicle; and through the V2X The layer delivers the first positioning data to a first protocol layer, where the first protocol layer is adjacent to the V2X layer, and the first protocol layer is used to provide positioning function on the PC5 interface.

In a ninth aspect, a terminal is provided. The terminal includes a processor and a memory, and the memory stores information that can be stored in the A program or instruction running on a processor that, when executed by the processor, implements the steps of the method described in the first aspect, or implements the steps of the method described in the second aspect, or implements the method described in the second aspect. The steps of the method described in the third aspect, or the steps of implementing the method described in the fourth aspect.

In a tenth aspect, a terminal is provided, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the method described in the first aspect. Steps, or steps to implement the method described in the second aspect, or steps to implement the method described in the third aspect, or steps to implement the method described in the fourth aspect.

In an eleventh aspect, a network side device is provided. The network side device has a processor and a memory. The memory stores programs or instructions that can be run on the processor. The program or instructions are executed by the processor. When realizing the steps of the method described in the first aspect, or the steps of realizing the method described in the second aspect, or the steps of realizing the method described in the third aspect, or realizing the method described in the fourth aspect step.

In a twelfth aspect, a communication system is provided, including: a first terminal and a second terminal. The first terminal can be used to perform the steps of the method described in the first aspect, and the second terminal can be used to perform the steps of the method as described in the first aspect. The steps of the method described in the second aspect; or, the first terminal can be used to perform the steps of the method described in the third aspect, and the second terminal can be used to perform the method described in the fourth aspect. step

In a thirteenth aspect, a readable storage medium is provided. Programs or instructions are stored on the readable storage medium. When the programs or instructions are executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method are implemented. The steps of the method described in the second aspect, or the steps of implementing the method described in the third aspect, or the steps of implementing the method described in the fourth aspect.

In a fourteenth aspect, a chip is provided. The chip includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the method described in the first aspect. The steps of the method, or the steps of implementing the method as described in the second aspect, or the steps of implementing the method as described in the third aspect, or the steps of implementing the method as described in the fourth aspect.

In a fifteenth aspect, a computer program product/program product is provided, the computer program/program product is stored in a storage medium, and the computer program/program product is executed by at least one processor to implement the first aspect The steps of the method described in the second aspect, or the steps of realizing the method described in the third aspect, or the steps of realizing the method described in the fourth aspect.

In the embodiment of this application, the first protocol layer that provides the positioning function on the PC5 interface is introduced into the SL architecture, and then the first positioning message is generated through the first protocol layer and the first positioning message is submitted to the second protocol layer, and finally the first positioning message is sent to the second terminal through the PC-5 interface in the second protocol layer, thereby enabling reliable transmission of the positioning message under the SL architecture and ensuring communication performance under the SL architecture. .

Description of the drawings

Figure 1 is a schematic structural diagram of a wireless communication system provided by an exemplary embodiment of the present application.

Figure 2 is a schematic flowchart of a SL communication method provided by an exemplary embodiment of the present application.

Figure 3 is a schematic flowchart of a SL communication method provided by another exemplary embodiment of the present application.

Figure 4a is a schematic diagram of the SL architecture provided by an exemplary embodiment of the present application.

Figure 4b is one of the schematic structural diagrams of a control plane protocol stack provided by an exemplary embodiment of the present application.

Figure 4c is the second structural schematic diagram of a control plane protocol stack provided by an exemplary embodiment of the present application.

Figure 4d is a third structural schematic diagram of a control plane protocol stack provided by an exemplary embodiment of the present application.

Figure 5 is a schematic flowchart of an SL communication method provided by another exemplary embodiment of the present application.

Figure 6 is a schematic flowchart of an SL communication method provided by another exemplary embodiment of the present application.

Figure 7 is a schematic structural diagram of a user plane protocol stack provided by an exemplary embodiment of the present application.

Figure 8 is a schematic flowchart of a SL communication method provided by another exemplary embodiment of the present application.

Figure 9 is a schematic flowchart of a SL communication method provided by another exemplary embodiment of the present application.

Figure 10 is a schematic structural diagram of an SL communication device provided by an exemplary embodiment of the present application.

Figure 11 is a schematic structural diagram of an SL communication device provided by another exemplary embodiment of the present application.

Figure 12 is a schematic structural diagram of an SL communication device provided by another exemplary embodiment of the present application.

Figure 13 is a schematic structural diagram of an SL communication device provided by another exemplary embodiment of the present application.

Figure 14 is a schematic structural diagram of a terminal provided by an exemplary embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art fall within the scope of protection of this application.

The terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects and are not used to describe a specific order or sequence. It is to be understood that the terms so used are interchangeable under appropriate circumstances so that the embodiments of the present application can be practiced in sequences other than those illustrated or described herein, and that "first" and "second" are distinguished objects It is usually one type, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "and/or" in the description and claims indicates at least one of the connected objects, and the character "/" generally indicates that the related objects are in an "or" relationship.

It is worth pointing out that the technology described in the embodiments of this application is not limited to Long Term Evolution (LTE)/LTE Evolution (LTE-Advanced, LTE-A) systems, and can also be used in other wireless communication systems, such as code Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access, OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA) and other systems. The terms "system" and "network" in the embodiments of this application are often used interchangeably, and the described technology can be used not only for the above-mentioned systems and radio technologies, but also for other systems and radio technologies. The following description describes the New Radio (NR) interface for example purposes. systems, and NR terminology is used in much of the following description, but these techniques can also be applied to applications other than NR system applications, such as 6th Generation ( ^6th Generation, 6G) communication systems.

Figure 1 shows a block diagram of a wireless communication system to which embodiments of the present application are applicable. The wireless communication system includes a terminal 11 and a network side device 12. Among them, the terminal 11 can be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), or a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), a handheld computer, a netbook, or a super mobile personal computer. (ultra-mobile personal computer, UMPC), mobile Internet device (Mobile Internet Device, MID), augmented reality (augmented reality, AR)/virtual reality (VR) equipment, robots, wearable devices (Wearable Device) , vehicle user equipment (VUE), pedestrian terminal (Pedestrian User Equipment, PUE), smart home (home equipment with wireless communication functions, such as refrigerators, TVs, washing machines or furniture, etc.), game consoles, personal computers (personal computer, PC), teller machine or self-service machine and other terminal-side devices. Wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets) bracelets, smart anklets, etc.), smart wristbands, smart clothing, etc. It should be noted that the embodiment of the present application does not limit the specific type of the terminal 11. The network side equipment 12 may include access network equipment or core network equipment, where the access network equipment 12 may also be called wireless access network equipment, radio access network (Radio Access Network, RAN), radio access network function or Wireless access network unit. The access network device 12 may include a base station, a Wireless Local Area Network (WLAN) access point or a WiFi node, etc. The base station may be called a Node B, an evolved Node B (eNB), an access node, etc. Point, base transceiver station (Base Transceiver Station, BTS), radio base station, radio transceiver, basic service set (Basic Service Set, BSS), extended service set (Extended Service Set, ESS), home B node, home evolved type B node, Transmitting Receiving Point (TRP) or some other suitable terminology in the field, as long as the same technical effect is achieved, the base station is not limited to specific technical terms. It should be noted that in the implementation of this application This example only takes the base station in the NR system as an example, and does not limit the specific type of base station.

The technical solutions provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings through some embodiments and their application scenarios.

As shown in Figure 2, a schematic flow chart of a SL communication method 200 is provided for an exemplary embodiment of the present application. The method may be, but is not limited to, executed by a first terminal. Specifically, it may be executed by hardware installed in the first terminal and/or Software execution. In this embodiment, the method 200 may include at least the following steps.

S210. The first terminal generates a first positioning message through the first protocol layer.

Among them, the first protocol layer is a protocol layer introduced from the control plane in this embodiment for the SL architecture (or SL mechanism), and is used to provide positioning functions on the PC5 interface, such as the definition and interaction of positioning messages on the PC5 interface. wait. It can be understood that the first protocol layer may also be called a sidelink positioning protocol (Sidelink Positioning Protocol, SLPP), etc., and the first positioning message may also be called an SLPP protocol message, etc., which are not limited here.

S220: The first terminal submits the first positioning message generated by the first protocol layer to the second protocol layer.

Wherein, the second protocol layer is adjacent to the first protocol layer. For example, the second protocol layer is located in the first protocol layer. The next layer and so on. In this embodiment, the second protocol layer may include a Packet Data Convergence Protocol (PDCP) layer or a third protocol layer, and the third protocol layer may include PC5 Radio Resource Control (RRC) layer, PC5-S protocol layer, and PC5-D.

It can be understood that the PC5-RRC layer can be used to exchange terminal capability information on the PC5 interface, configure SL-data bearer (Data Radio Bearer, DRB), maintain the PC5-RRC connection or detect link failure, etc. The PC5-S protocol layer is used for the establishment/maintenance process of unicast connections between terminals and the interaction of specific signaling. The PC5-D layer protocol is used to specify the Proximity based Service (ProSe) discovery function supported by Vehicle-to-Everything (V2X).

S230: The first terminal sends the first positioning message to the second terminal through the PC-5 interface at the second protocol layer.

Correspondingly, for a second terminal directly connected to the first terminal, the second terminal can receive the first positioning message sent by the first terminal on the PC5 interface through the second protocol layer, and transmit the first positioning message through the second protocol layer. The first positioning message is submitted to the first protocol layer. Then, the first protocol layer on the second terminal performs the corresponding positioning operation according to the received first positioning message, thereby completing the transmission of the positioning message on the SL architecture. .

It can be understood that, similar to the first protocol layer and the second protocol layer on the first terminal, the first protocol layer on the second terminal is also introduced from the control plane in this embodiment for the SL architecture (or SL mechanism). The protocol layer is used to provide the positioning function on the PC5 interface. The second protocol layer on the second terminal may also include a PDCP layer or a third protocol layer, and the third protocol layer includes at least one of a PC5-RRC layer, a PC5-S protocol layer, and a PC5-D. However, it should be noted that if the second protocol layer on the first terminal is the PDCP layer, the second protocol layer on the second terminal is also the PDCP layer. If the second protocol layer on the first terminal is PC5-RRC layer, the second protocol layer on the second terminal is also the PC5-RRC layer, that is, the protocol stack on the second terminal is the same as the protocol stack on the first terminal. Therefore Ensure reliable transmission of the first positioning message.

In this embodiment, by introducing the first protocol layer that provides the positioning function on the PC5 interface into the SL architecture, and then generating the first positioning message through the first protocol layer and submitting the first positioning message to the second protocol layer, Finally, the first positioning message is sent to the second terminal through the PC-5 interface in the second protocol layer, thereby enabling reliable transmission of the positioning message under the SL architecture and ensuring communication performance under the SL architecture.

As shown in Figure 3, a schematic flowchart of a SL communication method 300 is provided for an exemplary embodiment of the present application. This method can be, but is not limited to, executed by a first terminal. Specifically, it can be performed by hardware installed in the first terminal and/or Software execution. In this embodiment, the method 300 may include at least the following steps.

S310. The first terminal generates a first positioning message through the first protocol layer.

Wherein, the first protocol layer is used to provide positioning function on the PC5 interface.

S320: The first terminal submits the first positioning message generated by the first protocol layer to the second protocol layer.

Wherein, the second protocol layer is adjacent to the first protocol layer, the second protocol layer includes a Packet Data Convergence Protocol PDCP layer or a third protocol layer, and the third protocol layer includes a PC5 Radio Resource Control RRC layer. , PC5-S protocol At least one of layer and PC5-D.

It can be understood that the implementation process of S310-S320 can refer to the relevant description in the method embodiment 200. To avoid duplication, the details will not be described again.

S330: The first terminal sends the first positioning message to the second terminal through the PC-5 interface at the second protocol layer.

It can be understood that for the implementation process of S330, in addition to referring to the relevant description of the method embodiment 200, as a possible implementation manner, the first terminal can send a request to the PC5 interface through the first bearer at the second protocol layer. The second terminal sends the first positioning message.

Optionally, the type of the first bearer may be determined according to the type of the second protocol layer. For example, when the second protocol layer is a PDCP layer, the first bearer may be an SL signaling bearer (Signalling Radio Bearer (SRB) or SL-DRB. It can be understood that, in the case where the first bearer is SL-SRB, the first bearer may be dedicated to carrying messages of the first protocol layer. For example, the first bearer may be a newly introduced signal. Let it be carried and different from any one of SL-SRB3, SL-SRB2, SL-SRB1 and SL-SRB0, such as SL-SRB5.

Of course, similar to SL-SRB3, SL-SRB2, SL-SRB1, and SL-SRB0, the first bearer newly introduced in this application may not require other signaling to be established and released, that is, the first bearer It exists by default and corresponds to the configuration parameters of the PDCP layer, the configuration parameters of the Radio Link Control (RLC) layer, the configuration parameters of the Medium Access Control (MAC) layer, and the corresponding SL-SRB5 The Logical Channel Identity (LCID), etc. can be agreed upon by the protocol. For example, Table 1 shows parameter information corresponding to a possible first bearer provided in this embodiment.

Table 1

It is worth noting that from the perspective of a terminal (such as a first terminal or a second terminal), this embodiment introduces a The first bearer is to enable the terminal as the receiving end (such as the second terminal) to identify whether the message type of the received control signaling (such as the first positioning message) is on the first protocol layer according to the bearer type. message, thereby deciding whether to further submit the message to the first protocol layer at the PDCP layer.

In other words, this example 1 introduces a different SL-SRB than the existing one to carry the transmission of messages of the first protocol layer. This not only reduces the transmission burden of the existing bearer, but also serves as a dedicated bearer for positioning signaling. The second terminal This bearer can quickly separate location interaction and other interaction messages, thereby efficiently performing location-related operations. Moreover, independent bearers can also facilitate differentiated control of transmission priorities, and delay-sensitive location services can benefit from this. In addition, for control plane designers, such an arrangement is conducive to logical self-consistency and facilitates subsequent signaling design to enhance positioning performance in SL.

Based on the foregoing content, as a possible implementation, as shown in Figure 4a, from the perspective of the control plane, the first positioning message can be independently carried on the first bearer for transmission, then it can also Perform independent transmission priority control, for example, the transmission priority of the first bearer is always lower than other SL-SRBs (SL-SRB0, SL-SRB 1, etc.) or the same as other SL-SRBs; for another example, the The transmission priority of the above-mentioned first bearer can be changed to achieve relative functional priority. For example, when the location service requirements are not sensitive to delay, it can be used than other bearers. SL-SRB has a lower priority to alleviate the problem of business congestion. It can be understood that "SCCH" shown in Figure 4a is the signaling control channel (Signaling Control Channel), "STCH" is the SL transmission channel (Sidelink Traffic Channel), and "PSCCH" is the physical side link control channel (Physical SideLink Control). Channel), "PSSCH" is the Physical SideLink Shared Channel (Physical SideLink Shared Channel), and "PSFCH" is the Physical SideLink Feedback Channel (Physical SideLink Feedback Channel). In addition, when the first bearer is the SL-DRB, the first PDCP PDU may include a protocol data unit (Service Data Unit, SDU) type (Type) field, and the SDU Type field may include First indication information, the first indication information is used to indicate the first protocol layer. In other words, similar to the aforementioned dedicated first bearer, the introduction of the first indication information is also to enable the terminal to identify whether the message type of the received control signaling is a message on the first protocol layer according to the bearer type, so as to The PDCP layer decides whether to further submit the message to the first protocol layer.

In one implementation, if the SDU Type is configured as shown in Table 2, then the first indication information may be "010".

Table 2

In addition to the aforementioned second protocol layer being the PDCP layer, when the second protocol layer is the PC5-RRC layer, the first bearer may be SL-SRB3. If the layer is the PC5-S protocol layer, the first bearer may be SL-SRBO, SL-SRB1 or SL-SRB2. If the second protocol layer is the PC5-D protocol layer, the first bearer may be SL-SRBO, SL-SRB1 or SL-SRB2. One bearer can be SL-SRB4.

Based on this, the following is combined with Example 1 and Example 2. When the second protocol layer is the PDCP layer and the third protocol layer respectively, the first terminal uses the first bearer in the second protocol layer. The process of sending the first positioning message to the second terminal on the PC5 interface is explained, and the content is as follows.

Example 1

Assuming that the second protocol layer is the PDCP layer, as shown in Figure 4b, the protocol stack for the control plane positioning signaling interaction between the first terminal and the second terminal provided in Example 1 is Schematic. Wherein, the PDCP layer is adjacent to the first protocol layer and is located below the first protocol layer. Based on this, when there is a SL positioning requirement, the first terminal can generate the first positioning message based on the first protocol layer, and then submit the first positioning message to the PDCP layer. The PDCP layer The first positioning message is then sent to the second terminal through the first bearer on the PC5 interface, and the process includes but is not limited to the following (11)-(14).

(11) Based on the first positioning message, the first terminal generates a first PDCP protocol data unit (Protocol Data Unit, PDU) through the first PDCP entity (corresponding to the PDCP layer in Figure 4b), and sends the first A PDCP PDU is delivered to the first RLC entity (corresponding to the RLC layer in Figure 4b), where the first PDCP entity corresponds to the first bearer, that is, the first protocol layer delivers the first positioning message to the first PDCP entity, It can be carried by the first bearer (such as SL-SRB 5, SL-DRB).

(12) The first RLC entity generates a first RLC PDU based on the first PDCP PDU, and submits the first RLC PDU to the first MAC entity (corresponding to the MAC layer in Figure 4b).

(13) The first MAC entity generates a first MAC PDU based on the first RLC PDU, and submits the first MAC PDU to the physical layer (Physical Layer, PHY).

Optionally, when generating the first MAC PDU, the LCID may be set in the header of the corresponding MAC message to the LCID corresponding to the first bearer, that is, the MAC of the first MAC PDU. The header may include the LCID corresponding to the first bearer.

It can be understood that "LCID" is an identifier that distinguishes a logical channel and is used to transmit the first bearer of the first protocol layer. In this embodiment, considering backward compatibility, one of the LCIDs reserved (unused) in the related technology may be selected as the LCID corresponding to the first bearer. For example, if the LCID value range of the MAC layer sub-header in the related art is as shown in Table 3 below, then the LCID value corresponding to the first bearer can be selected from "reserved values" 20-61.

table 3

Regarding the security issue of message transmission on the control plane at the PC5 interface, when the terminal receives the PC5-S message of direct connection establishment acceptance (DIRECT LINK ESTABLISHMENT ACCEPT), the security protection mechanism is activated, and subsequent PC5-S messages are protected through the security key. and PC5-RRC message protection. Based on this, in one implementation, the security key may also be used to encrypt the first positioning message. For example, the LCID corresponding to the first bearer (such as the lowest 5 bits of the LCID) can be used as an input parameter of the security algorithm to encrypt the first positioning message to achieve security protection of the first positioning message.

(14) The PHY sends the first MAC PDU to the second terminal through the PC5 interface.

Further, please refer to Figure 4b again. Considering that the second terminal and the first terminal have the same protocol stack, then the second terminal receives the first terminal sent by the first terminal through the PDCP layer on the PC5 interface. Certain cancellation After the PDCP layer delivers the first positioning message to the first protocol layer through the first bearer, the delivery process may include but is not limited to the following (21)-(24).

(21) The second terminal receives the first MAC PDU sent by the first terminal through the PC5 interface in the PHY, and delivers the first MAC PDU to the third MAC entity. Wherein, the first MAC PDU corresponds to the first positioning message, that is, the first MAC PDU carries the first positioning message.

(22) The third MAC entity generates a first RLC PDU according to the first MAC PDU, and delivers the first RLC PDU to the third RLC entity.

In one implementation, after receiving the first MAC PDU, the third MAC entity can identify the LCID carried in the first MAC PDU. When the LCID is the LCID corresponding to the first bearer, the third MAC entity can identify the LCID carried in the first MAC PDU. The third MAC entity processes the first MAC PDU and submits it upward in sequence to the third RLC entity and the third PDCP entity corresponding to the first bearer.

(23) The third RLC entity generates a first PDCP PDU according to the first RLC PDU, and delivers the first PDCP PDU to the third PDCP entity, wherein the third PDCP entity and the first PDCP entity Bearing correspondence.

(24) The third PDCP entity determines the first positioning message according to the first PDCP PDU.

Among them, since the third PDCP entity corresponds to the first bearer, the third PDCP entity, after processing the first PDCP PDU to obtain the PDCP SDU, submits the PDCP SDU to the first protocol layer, thereby , complete the transmission of the first positioning message between the first terminal and the second terminal.

Of course, during the transmission process of the first positioning message, the second terminal determines the first bearer according to the LCID carried in the first MAC PDU and thereby realizes the transmission of the first positioning message. As another implementation The method may also be determined based on the first indication information included in the SDU type field included in the first PDCP PDU. For example, after receiving the first PDCP PDU submitted by the third RLC entity, the third PDCP entity may parse the first PDCP PDU. If the first PDCP PDU includes an SDU type field, and the SDU type field includes first indication information, then the third PDCP entity determines the first positioning message based on the first PDCP PDU. , delivering the first positioning message to the first protocol layer, thereby completing the transmission of the first positioning message between the first terminal and the second terminal.

In this example 1, a new positioning protocol is provided for the SL mechanism at the PC5 interface to specify the communication process for positioning interaction between terminals through direct connection, such as clarifying the order in which positioning interaction and other necessary interactions occur. At the same time, since the first protocol layer is adjacent to the PDCP layer, it can also reduce the impact on PC5-S or PC5 RRC message transmission and reduce processing overhead.

Example 2

Assuming that the second protocol layer is the PC5-RRC layer, as shown in Figure 4c, it is a schematic structural diagram of the protocol stack for control plane positioning signaling interaction between the first terminal and the second terminal provided in Example 2. . Wherein, the PC5-RRC layer is adjacent to the first protocol layer and is located at a lower layer of the first protocol layer. Based on this, the first terminal can perform SL positioning based on the first protocol when there is a SL positioning requirement. The layer generates the first positioning message, and then delivers the first positioning message to the PC5-RRC layer, and the PC5-RRC layer then transmits the first positioning message to the second terminal through the first bearer on the PC5 interface. The process of sending the first positioning message includes but is not limited to the processes described in (31)-(35) below.

(31) The first terminal generates a first PC5-RRC message at the PC5-RRC layer (corresponding to the PC5-RRC layer in Figure 4c), and submits the first PC5-RRC message to the second PDCP entity (Corresponding to the PDCP layer in Figure 4c). The first PC5-RRC message is a message introduced at the PC5-RRC layer in this embodiment, and can be dedicated to carrying messages of the first protocol layer, such as the first positioning message. That is, in this example, the PC5-RRC message is added by adding the PC5-RRC message. RRC and other message types to extend the positioning function, while also avoiding changes to the existing protocol stack.

Optionally, in this embodiment, the first PC5-RRC message may include a container information element (or called a byte stream), and the container information element carries the first positioning message.

It is worth noting that in this embodiment, the PC5-RRC layer does not pay attention to the actual content of the first positioning message, but is only used to assist the first protocol layer in passing it to the next layer, such as PDCP layer etc.

In addition, the second PDCP entity corresponds to the first bearer (such as SL-SRB3). That is, in this embodiment, the first PC5-RRC message can be transmitted to the PDCP layer (ie, the second PDCP entity) by being carried on SL-SRB3.

(32) The second PDCP entity generates a second PDCP PDU based on the first PC5-RRC message, and submits the second PDCP PDU to the second RLC entity (corresponding to the RLC layer in Figure 4c).

(33) The second RLC entity generates a second RLC PDU based on the second PDCP PDU, and submits the second RLC PDU to the second MAC entity (corresponding to the MAC layer in Figure 4c).

(34) The second MAC entity generates a second MAC PDU based on the second RLC PDU, and submits the second MAC PDU to the PHY (corresponding to the PHY layer in Figure 4c).

(35) The PHY sends the second MAC PDU to the second terminal through the PC5 interface. It can be understood that, similar to the aforementioned example 1, the second MAC PDU also carries the LCID, so that the second terminal can identify the corresponding first bearer according to the LCID, and then transmit the first positioning message according to the first bearer.

Based on this, please refer to Figure 4c again. Considering that the second terminal and the first terminal have the same protocol stack, then the second terminal receives the first terminal signal on the PC5 interface through the PC5-RRC layer. After sending the first positioning message, when the PC5-RRC layer submits the first positioning message to the first protocol layer through the first bearer, the submission process may include but is not limited to the following (41)-(44) ).

(41) The second terminal receives the second MAC PDU sent by the first terminal through the PC5 interface in the PHY, and delivers the second MAC PDU to the fourth MAC entity.

(42) The fourth MAC entity generates a second RLC PDU according to the second MAC PDU, and delivers the second RLC PDU to the fourth RLC entity.

Wherein, the fourth MAC entity identifies the LCID carried in the second MAC PDU, and in the case of the identified LCID, delivers the second RLC PDU to the corresponding SL-SRB3 in sequence according to the LCID. The fourth RLC entity and the fourth PDCP entity.

(43) The fourth RLC entity generates a second PDCP PDU according to the second RLC PDU, and delivers the second PDCP PDU to the fourth PDCP entity.

(44) The fourth PDCP entity generates a first PC5-RRC message based on the second PDCP PDU, and sends The first PC5-RRC message is submitted to the PC5-RRC layer, where the first PC5-RRC message includes a container information element, and the container information element carries the first positioning message.

It is worth noting that in the aforementioned solution given in Example 2, it is considered that if one terminal needs to send the first positioning message to another terminal, a unicast connection between the two terminals needs to be established, and then via PC5- The RRC layer sends the first certain message. That is to say, in one implementation, whether the first certain message is sent through the PC5-RRC layer is related to whether the unicast connection between the first terminal and the second terminal is established.

Based on this, as shown in Figure 4d, another protocol stack structure is provided in Example 2. In this protocol stack, the second protocol layer may include the PC5-RRC layer, the PC5-S protocol layer, the The PC5-D protocol layer is described above. In this case, the first protocol layer may include the following two methods when submitting the first positioning message.

Method 1: When the SL unicast connection between the first terminal and the second terminal has been established, the first terminal delivers the first positioning message to the first terminal at the first protocol layer. Describe the PC5-RRC layer. Correspondingly, when the SL unicast connection between the first terminal and the second terminal has been established, the second terminal delivers the first positioning message to the PC through the PC5-RRC layer. Describe the first protocol layer.

Method 2: When the SL unicast connection between the first terminal and the second terminal is not established, the first terminal submits the first positioning message generated by the first protocol layer to PC5-S protocol layer or PC5-D protocol layer. Correspondingly, when the SL unicast connection between the first terminal and the second terminal is not established, the second terminal uses the PC5-S protocol layer or the PC5-D protocol layer. The first positioning message is submitted to the first protocol layer.

Of course, for mode 2, when the second protocol layer is the PC5-S protocol layer or the PC5-D protocol layer, SL-SRB0, SL-SRB1, SL-SRB2 or SL can be multiplexed -SRB 4 sends the first positioning message.

In addition, in addition to the second protocol layer including the PC5-RRC layer, the PC5-S protocol layer, and the PC5-D protocol layer, the second protocol layer may also include the PC5-RRC layer. and the PC5-S protocol layer, or the second protocol layer may also include the PC5-RRC layer and the PC5-D protocol layer, which is not limited here.

As shown in Figure 5, a schematic flowchart of a SL communication method 500 is provided for an exemplary embodiment of the present application. The method 500 can be, but is not limited to, executed by a first terminal. Specifically, it can be performed by hardware and/or installed in the first terminal. or software execution. In this embodiment, the method 500 may include at least the following steps.

S510: The first terminal generates first positioning data at the first protocol layer.

Among them, the first protocol layer is a newly introduced protocol layer on the user plane in this embodiment for the SL architecture (or SL mechanism). It can be regarded as a positioning protocol layer obtained by extending the application layer, that is, a sub-layer inside the application layer. layer. Based on this, in this embodiment, the message generated on the first protocol layer can be sent together with the service data of the application layer, that is, for any data bearer (one SL-DRB), "SL positioning message and The business data of the application layer is sent together."

In this case, in this embodiment, the first protocol layer is used to provide positioning functions on the PC5 interface, such as the definition, interaction, and configuration of positioning data of the PC5 interface and the configuration of PC5 service quality by data packets related to positioning interaction. (Quality of Service, QoS) rules, etc. It can be understood that the first protocol layer can also be called direct connection positioning Protocol (Sidelink Positioning Protocol, SLPP), etc., the first positioning data may be called SLPP protocol data, etc., which is not limited here.

S520: The first terminal submits the first positioning data generated in the first protocol layer to the V2X layer.

Wherein, the first protocol layer is adjacent to the V2X layer, for example, the V2X layer is located at a layer below the first protocol layer, etc. It should be noted that the V2X layer can also be understood as a ProSe layer, etc., and is not limited here.

S530: The first terminal sends the first positioning data to the second terminal through the PC5 interface at the V2X layer.

Correspondingly, for the second terminal directly connected to the first terminal, the second terminal can receive the first positioning data sent by the first terminal on the PC5 interface through the V2X layer, and then use the V2X layer submits the first positioning data to the first protocol layer, then the first protocol layer on the second terminal performs the corresponding positioning operation according to the received first positioning message, thereby completing Transmission of positioning messages on SL architecture.

In addition, similar to the first terminal, the first protocol layer on the second terminal is also a newly introduced protocol layer on the user plane for the SL architecture (or SL mechanism) in this embodiment, and is used to provide positioning on the PC5 interface. Functions will not be described again in this embodiment.

In this embodiment, the first protocol layer is introduced from the user plane, the first positioning message is generated through the first protocol layer, and the first positioning message is submitted to the second protocol layer, and finally the second protocol layer The layer sends the first positioning message to the second terminal through the PC-5 interface, thereby enabling transmission of the positioning message under the SL architecture and ensuring communication performance under the SL architecture.

In addition, this embodiment introduces the first protocol layer from the user plane, which can also reduce the impact on the existing control plane access layer protocol architecture and ensure communication stability under the SL architecture.

As shown in Figure 6, a schematic flowchart of a SL communication method 600 is provided for an exemplary embodiment of the present application. This method can be, but is not limited to, executed by a first terminal. Specifically, it can be performed by hardware installed in the first terminal and/or Software execution. In this embodiment, the method 600 may include at least the following steps.

S610. The first terminal generates first positioning data at the first protocol layer.

Wherein, the first protocol layer is used to provide positioning function on the PC5 interface.

S620: The first terminal submits the first positioning data generated at the first protocol layer to the V2X layer.

Wherein, the first protocol layer is adjacent to the V2X layer.

It can be understood that the implementation process of S610-S620 can refer to the relevant descriptions in the method embodiment 500, and achieve the same or corresponding technical effects. To avoid duplication, the details will not be described again.

S630: The first terminal sends the first positioning data to the second terminal through the PC5 interface at the V2X layer.

It can be understood that for the implementation process of S630, in addition to referring to the relevant description in method embodiment 500, in this embodiment, the first terminal sends the first positioning to the second terminal through the PC5 interface at the V2X layer. There can be multiple data processes to meet the adaptability and flexibility of the communication protocol. In this regard, the implementation process of the aforementioned S630 is illustratively described below in conjunction with Example 3 and Example 4, as follows.

Example 3

As shown in Figure 7, when the V2X application of the first terminal generates positioning requirements for the second terminal, it can The negotiation layer generates the first positioning data, submits the first positioning data to the V2X entity (corresponding to the V2X layer in Figure 7), and then the V2X entity uses the following but not limited to (51)-(56) The process for transmitting the first positioning data is as follows.

(51) The V2X entity maps the first positioning data into a positioning QoS flow according to the preconfigured PC5 QoS rules and then submits it to the Service Data Adaptation Protocol (Service Data Adaptation Protocol, SDAP) entity (corresponding to the SDAP layer in Figure 7). Among them, the preconfigured PC5 QoS rules can be implemented by agreement or preset in the terminal.

In addition, the positioning QoS flow may also have a positioning interaction-specific PC5 QoS flow ID (PC5 QoS Flow ID, PQFI) for the SDAP entity to process and submit the positioning QoS flow according to the PQFI.

It can be understood that corresponding to the V2X layer, the first protocol layer is also pre-configured with PC5 QoS rules, thereby ensuring the consistency of the understanding of PC5 QoS rules between the V2X layer and the first protocol layer, thereby ensuring the accuracy of the first positioning data. Correct transmission.

(52) The SDAP entity generates a first SDAP PDU based on the positioning QoS flow, and delivers the first SDAP PDU to the PDCP entity (corresponding to the PDCP layer in Figure 7).

(53) The PDCP entity generates the first PDCP PDU based on the first SDAP PDU, and submits the first PDCP PDU to the RLC entity (corresponding to the RLC layer in Figure 7).

(54) The RLC entity generates a first RLC PDU based on the first PDCP PDU, and submits the first RLC PDU to the MAC entity (corresponding to the MAC layer in Figure 7).

(55) The MAC entity generates a first MAC PDU based on the first RLC PDU, and submits the first MAC PDU to the PHY (corresponding to the PHY layer in Figure 7).

(56) The PHY sends the first MAC PDU to the second terminal through the PC5 interface.

Further, please refer to Figure 7 again. Considering that the second terminal and the first terminal have the same protocol stack, then the second terminal receives the first terminal sent by the first terminal through the V2X layer on the PC5 interface. After positioning data, when the V2X layer sends the first positioning data to the second terminal through the PC5 interface, the sending process may include but is not limited to the following (61)-(66).

(61) The second terminal receives the first MAC PDU sent by the first terminal through the PC5 interface in the physical layer PHY, and submits the first MAC PDU to the MAC entity, wherein the first MAC PDU is The first positioning data corresponds.

(62) The MAC entity generates a first RLC PDU according to the first MAC PDU, and submits the first RLC PDU to the RLC entity.

(63) The RLC entity generates the first PDCP PDU according to the first RLC PDU, and delivers the first PDCP PDU to the PDCP entity.

(64) The PDCP entity generates the first SDAP PDU according to the first PDCP PDU, and delivers the first SDAP PDU to the SDAP entity.

(65) The SDAP entity determines the positioning QoS flow according to the first SDAP PDU, and delivers the positioning QoS flow to the V2X entity according to the PC5 QoS flow identifier PQFI in the positioning QoS flow.

It can be understood that the SDAP entity maps the first PDCP PDU to the positioning-related QoS flow through the preconfigured PC5 QoS rules, and then maps the positioning according to the PC5 QoS flow identifier PQFI in the positioning QoS flow. The QoS flow is delivered to the V2X entity.

(66) The V2X entity maps the positioning QoS flow to the first positioning data according to the preconfigured PC5 QoS rules, and then submits the first positioning data to the first protocol layer, that is, by the second The V2X application on the terminal receives, thereby completing the transmission of the first positioning data between the first terminal and the second terminal, ensuring the transmission performance of the SL communication system.

Example 4

Please refer to Figure 7 again. The protocol stack mentioned in Example 4 is the same as that in Example 3. However, the difference between Example 4 and Example 3 is that in Example 3, it is distinguished at the SDAP layer whether to deliver the received MAC PDU. to the first protocol layer, and in Example 4, the distinction is made at the PDCP layer, that is, in Example 4, the positioning-specific PDCP Data PDU (or PDCP PDU) format is introduced so that the second terminal can decode the PDCP PDU at the PDCP layer. , and further determine whether the Data carried in the PDCP PDU is an SL positioning message (such as the first positioning data) through the SDU Type field carried in the PDCP PDU. It can be understood that the configuration of SDU Type can refer to the above-mentioned Table 3, and will not be described again here.

Based on this, the transmission process of the first positioning data will be described below in conjunction with the processes described in (71)-(76).

(71) The V2X entity generates a first V2X PDU based on the first positioning data, and submits the first V2X PDU to the SDAP entity.

(72) The SDAP entity generates a second SDAP PDU based on the first V2X PDU, and delivers the second SDAP PDU to the PDCP entity.

(73) The PDCP entity generates a second PDCP PDU based on the second SDAP PDU, and delivers the second PDCP PDU to the RLC entity. Wherein, the second PDCP PDU at least includes an SDU type field, the SDU type field includes second indication information, and the second indication information is used to indicate the first protocol layer.

(74) The RLC entity generates a second RLC PDU based on the second PDCP PDU, and submits the second RLC PDU to the MAC entity.

(75) The MAC entity generates a second MAC PDU based on the second RLC PDU, and submits the second MAC PDU to the PHY.

(76) The PHY sends the second MAC PDU to the second terminal through the PC5 interface.

Further, please refer to Figure 7 again. Considering that the second terminal and the first terminal have the same protocol stack, then the second terminal receives the message sent by the first terminal through the V2X layer on the PC5 interface. After the first positioning data, when the V2X layer sends the first positioning data to the second terminal through the PC5 interface, the sending process may include but is not limited to the following (81)-(86).

(81) The second terminal receives the second MAC PDU sent by the first terminal through the PC5 interface in the PHY, and submits the second MAC PDU to the MAC entity, wherein the second MAC PDU and the First positioning Data correspondence.

(82) The MAC entity generates a second RLC PDU according to the second MAC PDU, and submits the second RLC PDU to the RLC entity.

(83) The RLC entity generates a second PDCP PDU according to the second RLC PDU, and delivers the second PDCP PDU to the PDCP entity.

(84) The PDCP entity determines the SDU type field included in the second PDCP PDU, and when the SDU type field contains the second indication information, generates a second SDAP PDU according to the second PDCP PDU. , and submit the second SDAP PDU to the SDAP entity. It can be understood that the second indication information is used to indicate the first protocol layer.

(85) The SDAP entity generates a second V2X PDU according to the second SDAP PDU, and delivers the second V2X PDU to the V2X entity.

(86) The V2X entity determines the first positioning data according to the second V2X PDU.

In this embodiment, starting from the SDAP layer and the PDCP layer, two transmission schemes for the first positioning data on the data plane are provided, thereby improving the applicability and flexibility of the SL communication method provided in this embodiment.

As shown in Figure 8, a schematic flowchart of a SL communication method 800 is provided for an exemplary embodiment of the present application. This method can be, but is not limited to, executed by a second terminal. Specifically, it can be performed by hardware installed in the second terminal and/or Software execution. In this embodiment, the method 800 may include at least the following steps.

S810: The second terminal receives the first positioning message sent by the first terminal on the PC5 interface through the second protocol layer.

Wherein, the second protocol layer includes a Packet Data Convergence Protocol PDCP layer or a third protocol layer, and the third protocol layer includes at least one of a PC5 Radio Resource Control RRC layer, a PC5-S protocol layer, and a PC5-D.

S820: The second terminal submits the first positioning message to the first protocol layer through the second protocol layer.

Wherein, the second protocol layer is adjacent to the first protocol layer, and the first protocol layer is used to provide positioning function on the PC5 interface.

Optionally, the second terminal delivers the first positioning message to the first protocol layer through the second protocol layer, including: the second terminal passes the first bearer through the second protocol layer. The first positioning message is delivered to the first protocol layer.

Optionally, when the second protocol layer is the PDCP layer, the second terminal receives the first positioning message sent by the first terminal through the PC5 interface at the second protocol layer, Including: the second terminal receives the first MAC PDU sent by the first terminal through the PC5 interface in the physical layer PHY, and delivers the first MAC PDU to the third MAC entity, wherein the first MAC PDU Corresponding to the first positioning message; the third MAC entity generates a first RLC PDU according to the first MAC PDU, and delivers the first RLC PDU to the third RLC entity; the third RLC entity generates a first RLC PDU according to the first MAC PDU. The first RLC PDU generates a first PDCP PDU, and delivers the first PDCP PDU to a third PDCP entity, where the third PDCP entity corresponds to the first bearer; the third PDCP entity The first PDCP PDU determines the first positioning message.

Optionally, when the second protocol layer is the PDCP layer, the first bearer is an SL signaling bearer. SRB or SL data carries DRB.

Optionally, when the first bearer is an SL-SRB, the first bearer is determined based on the logical channel identifier LCID carried in the first MAC PDU.

Optionally, the first bearer is different from any one of SL-SRB3, SL-SRB2, SL-SRB1, and SL-SRBO.

Optionally, in the case where the first bearer is SL-DRB, the first bearer is determined based on the first indication information contained in the SDU type field, and the first PDCP PDU includes the SDU type field. .

Optionally, when the second protocol layer is the PC5-RRC layer, the second terminal receives the first positioning message sent by the first terminal through the PC5 interface at the second protocol layer, including: the second The terminal receives the second MAC PDU sent by the first terminal through the PC5 interface in the PHY, and submits the second MAC PDU to the fourth MAC entity; the fourth MAC entity generates a second MAC PDU based on the second MAC PDU. RLC PDU, and delivers the second RLC PDU to the fourth RLC entity; the fourth RLC entity generates a second PDCP PDU based on the second RLC PDU, and delivers the second PDCP PDU to the fourth PDCP Entity, the fourth PDCP entity corresponds to the first bearer; the fourth PDCP entity generates a first PC5-RRC message according to the second PDCP PDU, and delivers the first PC5-RRC message to the The PC5-RRC layer, wherein the first PC5-RRC message includes a container information element, and the container information element carries the first positioning message.

Optionally, when the second protocol layer is the PC5-RRC layer, the first bearer is SL-SRB3.

Optionally, in the case where the second protocol layer includes at least one of the PC5-S protocol layer, the PC5-D protocol layer and the PC5-RRC layer, the second terminal The second protocol layer delivers the first positioning message to the first protocol layer, including: when the SL unicast connection between the first terminal and the second terminal has been established, the second The terminal delivers the first positioning message to the first protocol layer through the PC5-RRC layer; when the SL unicast connection between the first terminal and the second terminal is not established, the terminal The second terminal delivers the first positioning message to the first protocol layer through the PC5-S protocol layer or PC5-D protocol layer.

It can be understood that since each implementation manner mentioned in method embodiment 800 has the same or corresponding technical features as each implementation manner in method embodiments 200-300, therefore, the implementation process of each implementation manner mentioned in method embodiment 800 You may refer to the relevant descriptions of each implementation in method embodiments 200-300 to achieve the same or corresponding technical features. To avoid duplication, they will not be described again here.

As shown in Figure 9, a schematic flowchart of a SL communication method 900 is provided for an exemplary embodiment of the present application. This method can be, but is not limited to, executed by a second terminal. Specifically, it can be performed by hardware installed in the second terminal and/or Software execution. In this embodiment, the method 900 may include at least the following steps.

S910: The second terminal receives the first positioning data sent by the first terminal through the PC5 interface at the V2X layer.

S920: The second terminal submits the first positioning data to the first protocol layer through the V2X layer.

Wherein, the first protocol layer is adjacent to the V2X layer, and the first protocol layer is used to provide positioning function on the PC5 interface.

Optionally, the second terminal receives the first positioning data sent by the first terminal through the PC5 interface at the V2X layer, including: the second terminal receives the first positioning data sent by the first terminal through the PC5 interface at the physical layer PHY. MAC PDU, and submit the first MAC PDU to the MAC entity, where the first MAC PDU corresponds to the first positioning data; the MAC entity generates a first RLC PDU according to the first MAC PDU, and sends the first RLC PDU to the MAC entity. The first RLC PDU is submitted to the RLC entity; the RLC entity generates a first PDCP PDU according to the first RLC PDU, and submits the first PDCP PDU to the PDCP entity; the PDCP entity generates a first PDCP PDU according to the first PDCP PDU generates the first SDAP PDU, and delivers the first SDAP PDU to the SDAP entity; the SDAP entity determines the positioning QoS flow based on the first SDAP PDU, and identifies the PQFI based on the PC5 QoS flow in the positioning QoS flow. The positioning QoS flow is delivered to the V2X entity; the V2X entity maps the positioning QoS flow into the first positioning data according to the preconfigured PC5 QoS rules.

Optionally, the second terminal receives the first positioning data sent by the first terminal through the PC5 interface at the V2X layer, including: the second terminal receives the second MAC PDU sent by the first terminal through the PC5 interface at the PHY , and submits the second MAC PDU to the MAC entity, where the second MAC PDU corresponds to the first positioning data; the MAC entity generates a second RLC PDU according to the second MAC PDU, and The second RLC PDU is submitted to the RLC entity; the RLC entity generates a second PDCP PDU according to the second RLC PDU, and submits the second PDCP PDU to the PDCP entity; the PDCP entity determines the second The SDU type field included in the PDCP PDU, and when the SDU type field contains the second indication information, generate a second SDAP PDU according to the second PDCP PDU, and submit the second SDAP PDU to the SDAP Entity; the SDAP entity generates a second V2X PDU based on the second SDAP PDU, and delivers the second V2X PDU to the V2X entity; the V2X entity determines the first V2X PDU based on the second V2X PDU Location data.

It can be understood that since each implementation manner mentioned in method embodiment 900 has the same or corresponding technical features as each implementation manner in method embodiments 500-600, therefore, the implementation process of each implementation manner mentioned in method embodiment 900 You may refer to the relevant descriptions of each implementation in method embodiments 500-600 to achieve the same or corresponding technical features. To avoid duplication, they will not be described again here.

For the SL communication method provided by the embodiment of the present application, the execution subject may be a SL communication device. In the embodiment of the present application, the method of the communication device of the SL performing the communication of the SL is taken as an example to describe the communication device of the SL provided by the embodiment of the present application.

As shown in Figure 10, it is a schematic structural diagram of a SL communication device 1000 provided by an exemplary embodiment of the present application. The device 1000 includes a first generation module 1010 for generating a first positioning message through a first protocol layer, where, The first protocol layer is used to provide the positioning function on the PC5 interface; the first transmission module 1020 is used to submit the first positioning message generated by the first protocol layer to the second protocol layer, wherein the The second protocol layer is adjacent to the first protocol layer. The second protocol layer includes the Packet Data Convergence Protocol PDCP layer or the third protocol layer. The third protocol layer includes the PC5 Radio Resource Control RRC layer, PC5-S At least one of the protocol layer and PC5-D; and sending the first positioning message to the second terminal through the PC-5 interface in the second protocol layer.

Optionally, the first terminal sends the first positioning message to the second terminal through the PC5 interface at the second protocol layer, including:

The first terminal sends the second terminal to the second terminal through the first bearer at the PC5 interface at the second protocol layer. A first positioning message, wherein the first bearer is dedicated to carrying messages of the first protocol layer.

Optionally, when the second protocol layer is the PDCP layer, the first terminal sends the second terminal to the second terminal through the first bearer on the PC-5 interface at the second protocol layer. The first positioning message includes:

Based on the first positioning message, the first terminal generates a first PDCP protocol data unit PDU through the first PDCP entity, and submits the first PDCP PDU to the first radio link control RLC entity, wherein, the The first PDCP entity corresponds to the first bearer;

The first RLC entity generates a first RLC PDU based on the first PDCP PDU, and submits the first RLC PDU to the first medium access control MAC entity;

The first MAC entity generates a first MAC PDU based on the first RLC PDU, and submits the first MAC PDU to the physical layer PHY;

The PHY sends the first MAC PDU to the second terminal through the PC5 interface.

Optionally, when the second protocol layer is the PDCP layer, the first bearer is an SL signaling bearer SRB or an SL data bearer DRB.

Optionally, when the first bearer is SL-SRB, the first bearer is different from any one of SL-SRB3, SL-SRB2, SL-SRB1, and SL-SRBO.

Optionally, the MAC header of the first MAC PDU includes the logical channel identifier LCID corresponding to the first bearer.

Optionally, when the first bearer is the SL-DRB, the first PDCP PDU includes a protocol data unit SDU type field, and the SDU type field contains first indication information, and the first The indication information is used to indicate the first protocol layer.

Optionally, when the second protocol layer is the PC5-RRC layer, the first terminal sends the first positioning message to the second terminal through the PC5 interface in the second protocol layer, including :

The first terminal generates a first PC5-RRC message at the PC5-RRC layer, and delivers the first PC5-RRC message to the second PDCP entity, where the first PC5-RRC message contains container information. element, the container information element carries the first positioning message, and the second PDCP entity corresponds to the first bearer;

The second PDCP entity generates a second PDCP PDU based on the first PC5-RRC message, and delivers the second PDCP PDU to the second RLC entity;

The second RLC entity generates a second RLC PDU based on the second PDCP PDU, and submits the second RLC PDU to the second MAC entity;

The second MAC entity generates a second MAC PDU based on the second RLC PDU, and submits the second MAC PDU to the PHY;

The PHY sends the second MAC PDU to the second terminal through the PC5 interface.

Optionally, the first PC5-RRC message is dedicated to transmitting messages of the first protocol layer.

Optionally, when the second protocol layer is the PC5-RRC layer, the first bearer is SL-SRB3.

Optionally, the second protocol layer includes at least one of the PC5-S protocol layer and the PC5-D protocol layer. In the case of the item and the PC5-RRC layer, the first transmission module 1020 delivers the first positioning message to the second protocol layer at the first protocol layer, including: between the first terminal and the When the SL unicast connection between the second terminals has been established, the first terminal submits the first positioning message to the PC5-RRC layer at the first protocol layer; When the SL unicast connection between the terminal and the second terminal is not established, the first terminal submits the first positioning message generated by the first protocol layer to the PC5-S protocol layer or PC5- D protocol layer.

As shown in Figure 11, it is a schematic structural diagram of a SL communication device 1100 provided by an exemplary embodiment of the present application. The device 1100 includes: a second transmission module 1110, used for the second terminal to receive data on the PC5 interface through the second protocol layer. The first positioning message sent by the first terminal, wherein the second protocol layer includes the Packet Data Convergence Protocol PDCP layer or the third protocol layer, and the third protocol layer includes the PC5 Radio Resource Control RRC layer and the PC5-S protocol layer. , at least one of PC5-D; and delivering the first positioning message to the first protocol layer through the second protocol layer, wherein the second protocol layer is adjacent to the first protocol layer, The first protocol layer is used to provide positioning function on the PC5 interface.

Optionally, the second transmission module 1110 delivers the first positioning message to the first protocol layer through the second protocol layer, including: the second transmission module 1110, in the second protocol The layer delivers the first positioning message to the first protocol layer through the first bearer.

Optionally, when the second protocol layer is the PDCP layer, the second transmission module 1110 receives the first positioning sent by the first terminal through the PC5 interface at the second protocol layer. The message includes: the second transmission module 1110 receives the first MAC PDU sent by the first terminal through the PC5 interface in the physical layer PHY, and delivers the first MAC PDU to the third MAC entity, wherein, the The first MAC PDU corresponds to the first positioning message; the third MAC entity generates a first RLC PDU according to the first MAC PDU, and delivers the first RLC PDU to the third RLC entity; the third RLC entity The third RLC entity generates a first PDCP PDU according to the first RLC PDU, and delivers the first PDCP PDU to a third PDCP entity, where the third PDCP entity corresponds to the first bearer; the third PDCP entity The three PDCP entities determine the first positioning message according to the first PDCP PDU.

Optionally, when the second protocol layer is the PDCP layer, the first bearer is an SL signaling bearer SRB or an SL data bearer DRB.

Optionally, when the first bearer is an SL-SRB, the first bearer is determined based on the logical channel identifier LCID carried in the first MAC PDU.

Optionally, the first bearer is different from any one of SL-SRB3, SL-SRB2, SL-SRB1, and SL-SRBO.

Optionally, in the case where the first bearer is SL-DRB, the first bearer is determined based on the first indication information contained in the SDU type field, and the first PDCP PDU includes the SDU type field. .

Optionally, when the second protocol layer is the PC5-RRC layer, the second transmission module 1110 receives the first positioning message sent by the first terminal through the PC5 interface at the second protocol layer, including: The second terminal receives the second MAC PDU sent by the first terminal through the PC5 interface in the PHY, and delivers the second MAC PDU to the fourth MAC entity; the fourth MAC entity generates the second MAC PDU based on the second MAC PDU. The second RLC PDU and all The second RLC PDU is delivered to the fourth RLC entity; the fourth RLC entity generates a second PDCP PDU according to the second RLC PDU and delivers the second PDCP PDU to the fourth PDCP entity. The PDCP entity corresponds to the first bearer; the fourth PDCP entity generates a first PC5-RRC message according to the second PDCP PDU, and delivers the first PC5-RRC message to the PC5-RRC layer, Wherein, the first PC5-RRC message includes a container information element, and the container information element carries the first positioning message.

Optionally, when the second protocol layer is the PC5-RRC layer, the first bearer is SL-SRB3.

Optionally, in the case where the second protocol layer includes at least one of the PC5-S protocol layer, the PC5-D protocol layer and the PC5-RRC layer, the second transmission module 1110 Submitting the first positioning message to the first protocol layer through the second protocol layer includes: when the SL unicast connection between the first terminal and the second terminal has been established, the The second terminal delivers the first positioning message to the first protocol layer through the PC5-RRC layer; when the SL unicast connection between the first terminal and the second terminal is not established. , the second terminal delivers the first positioning message to the first protocol layer through the PC5-S protocol layer or PC5-D protocol layer.

As shown in Figure 12, a schematic structural diagram of a SL communication device 1200 is provided for an exemplary embodiment of the present application. The device 1200 includes: a second generation module 1210 for generating first positioning data at the first protocol layer, where , the first protocol layer is used to provide the positioning function on the PC5 interface; the third transmission module 1220 is used to submit the first positioning data generated in the first protocol layer to the V2X layer of the Internet of Vehicles, where , the first protocol layer is adjacent to the V2X layer; and the V2X layer sends the first positioning data to the second terminal through the PC5 interface.

Optionally, the third transmission module 1220 sends the first positioning data to the second terminal through the PC5 interface at the V2X layer, including: the V2X entity maps the first positioning data according to the preconfigured PC5 QoS rules. In order to locate the quality of service QoS flow, it is submitted to the service data adaptation protocol SDAP entity. The positioning QoS flow has the PC5 QoS flow identifier PQFI; the SDAP entity generates the first SDAP PDU based on the positioning QoS flow, and sends the first SDAP PDU to the service data adaptation protocol SDAP entity. SDAP PDU is submitted to the PDCP entity; the PDCP entity generates a first PDCP PDU based on the first SDAP PDU, and submits the first PDCP PDU to the radio link control RLC entity; the RLC entity generates a first PDCP PDU based on the first SDAP PDU PDCP PDU generates a first RLC PDU, and submits the first RLC PDU to the medium access control MAC entity; the MAC entity generates a first MAC PDU based on the first RLC PDU, and submits the first MAC PDU Submitted to the physical layer PHY; the PHY sends the first MAC PDU to the second terminal through the PC5 interface.

Optionally, the third transmission module 1220 sends the first positioning data to the second terminal through the PC5 interface at the V2X layer, including: the V2X entity generates a first V2X PDU based on the first positioning data, and The first V2X PDU is delivered to the SDAP entity; the SDAP entity generates a second SDAP PDU based on the first V2X PDU, and delivers the second SDAP PDU to the PDCP entity; the PDCP entity based on the second The SDAP PDU generates a second PDCP PDU and delivers the second PDCP PDU to the RLC entity, wherein the second PDCP PDU at least includes an SDU type field, and the SDU type field includes second indication information, and the The second indication information is used to indicate the first protocol layer; the RLC entity generates a second RLC based on the second PDCP PDU PDU, and delivers the second RLC PDU to the MAC entity; the MAC entity generates a second MAC PDU based on the second RLC PDU, and delivers the second MAC PDU to the PHY; the PHY passes the PC5 interface Send the second MAC PDU to the second terminal.

As shown in Figure 13, it is a schematic structural diagram of an SL communication device 1300 provided by an exemplary embodiment of the present application. The device 1300 includes: a fourth transmission module 1310, used to receive the first transmission module 1310 through the PC5 interface at the V2X layer of the Internet of Vehicles. The first positioning data sent by the terminal; and submitting the first positioning data to the first protocol layer through the V2X layer, wherein the first protocol layer is adjacent to the V2X layer, and the first protocol layer Used to provide positioning function on PC5 interface.

Optionally, the fourth transmission module 1310 receives the first positioning data sent by the first terminal through the PC5 interface at the V2X layer, including: the fourth transmission module 1310 receives the first terminal through the PC5 interface at the physical layer PHY. The first MAC PDU sent, and the first MAC PDU is submitted to the MAC entity, wherein the first MAC PDU corresponds to the first positioning data; the MAC entity generates a third MAC PDU according to the first MAC PDU. An RLC PDU, and submit the first RLC PDU to the RLC entity; the RLC entity generates a first PDCP PDU according to the first RLC PDU, and submits the first PDCP PDU to the PDCP entity; the PDCP The entity generates a first SDAP PDU according to the first PDCP PDU, and delivers the first SDAP PDU to the SDAP entity; the SDAP entity determines the positioning QoS flow according to the first SDAP PDU, and determines the positioning QoS flow according to the positioning QoS flow. The PC5 QoS flow identifier PQFI in the positioning QoS flow is delivered to the V2X entity; the V2X entity maps the positioning QoS flow to the first positioning data according to the preconfigured PC5 QoS rules.

Optionally, the fourth transmission module 1310 receives the first positioning data sent by the first terminal through the PC5 interface at the V2X layer, including: the fourth transmission module 1310 receives the first positioning data sent by the first terminal through the PC5 interface at the PHY. a second MAC PDU, and submits the second MAC PDU to the MAC entity, where the second MAC PDU corresponds to the first positioning data; the MAC entity generates a second RLC based on the second MAC PDU PDU, and delivers the second RLC PDU to the RLC entity; the RLC entity generates a second PDCP PDU according to the second RLC PDU, and delivers the second PDCP PDU to the PDCP entity; the PDCP entity determines The SDU type field included in the second PDCP PDU, and when the SDU type field contains the second indication information, generate a second SDAP PDU according to the second PDCP PDU, and convert the second SDAP PDU is submitted to the SDAP entity; the SDAP entity generates a second V2X PDU based on the second SDAP PDU, and delivers the second V2X PDU to the V2X entity; the V2X entity determines based on the second V2X PDU the first positioning data.

The SL communication device in the embodiment of the present application (such as the aforementioned SL communication device 1000-1300) may be an electronic device, such as an electronic device with an operating system, or a component in the electronic device, such as an integrated circuit or chip. The electronic device may be a terminal or other devices other than the terminal. For example, terminals may include but are not limited to the types of terminals 11 listed above, and other devices may be servers, network attached storage (Network Attached Storage, NAS), etc., which are not specifically limited in the embodiment of this application.

The SL communication device provided by the embodiment of the present application can implement each process implemented by the method embodiments of Figures 2 to 9. process and achieve the same technical effect. To avoid repetition, we will not repeat it here.

An embodiment of the present application also provides a terminal, including a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the methods described in method embodiments 200-900. Method steps. This terminal embodiment corresponds to the above-mentioned terminal-side method embodiment. Each implementation process and implementation manner of the above-mentioned method embodiment can be applied to this terminal embodiment, and can achieve the same technical effect. Specifically, FIG. 14 is a schematic diagram of the hardware structure of a terminal that implements an embodiment of the present application.

The terminal 1400 includes but is not limited to: radio frequency unit 1401, network module 1402, audio output unit 1403, input unit 1404, sensor 1405, display unit 1406, user input unit 1407, interface unit 1408, memory 1409, processor 1410, etc. at least some parts of it.

Those skilled in the art can understand that the terminal 1400 may also include a power supply (such as a battery) that supplies power to various components. The power supply may be logically connected to the processor 1410 through a power management system, thereby managing charging, discharging, and power consumption through the power management system. Management and other functions. The terminal structure shown in FIG. 14 does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown in the figure, or some components may be combined or arranged differently, which will not be described again here.

It should be understood that in the embodiment of the present application, the input unit 1404 may include a graphics processing unit (Graphics Processing Unit, GPU) 14041 and a microphone 14042. The GPU 14041 is used for recording data by an image capture device (such as a camera) in the video capture mode or the image capture mode. The image data obtained from still pictures or videos is processed. The display unit 1406 may include a display panel 14061, which may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 1407 includes a touch panel 14071 and at least one of other input devices 14072. Touch panel 14071, also known as touch screen. The touch panel 14071 may include two parts: a touch detection device and a touch controller. Other input devices 14072 may include but are not limited to physical keyboards, function keys (such as volume control keys, switch keys, etc.), trackballs, mice, and joysticks, which will not be described again here.

In this embodiment of the present application, after receiving downlink data from the network side device, the radio frequency unit 1401 can transmit it to the processor 1410 for processing; in addition, the radio frequency unit 1401 can send uplink data to the network side device. Generally, the radio frequency unit 1401 includes, but is not limited to, an antenna, amplifier, transceiver, coupler, low noise amplifier, duplexer, etc.

Memory 1409 may be used to store software programs or instructions as well as various data. The memory 1409 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, an application program or instructions required for at least one function (such as a sound playback function, Image playback function, etc.) etc. Additionally, memory 1409 may include volatile memory or nonvolatile memory, or memory 1409 may include both volatile and nonvolatile memory. Among them, the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electrically removable memory. Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. Volatile memory can be random access memory (Random Access Memory, RAM), static random access memory (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), synchronous dynamic random access memory (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory memory (Double Data Rate SDRAM, DDRSDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (Synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DRRAM). Memory 1409 in embodiments of the present application includes, but is not limited to, these and any other suitable types of memory.

The processor 1410 may include one or more processing units; optionally, the processor 1410 integrates an application processor and a modem processor, where the application processor mainly handles operations related to the operating system, user interface, application programs, etc., Modem processors mainly process wireless communication signals, such as baseband processors. It can be understood that the above modem processor may not be integrated into the processor 1410.

In one implementation, the processor 1410 is configured to generate a first positioning message through a first protocol layer, where the first protocol layer is used to provide the positioning function on the PC5 interface; the radio frequency unit 1401 is used to transmit the The first positioning message generated by the first protocol layer is submitted to a second protocol layer, wherein the second protocol layer is adjacent to the first protocol layer, and the second protocol layer includes Packet Data Convergence Protocol PDCP layer or a third protocol layer, the third protocol layer includes at least one of the PC5 radio resource control RRC layer, PC5-S protocol layer, and PC5-D; and in the second protocol layer, the PC-5 interface The second terminal sends the first positioning message.

Alternatively, the radio frequency unit 1401 receives the first positioning message sent by the first terminal on the PC5 interface through the second protocol layer, where the second protocol layer includes the Packet Data Convergence Protocol PDCP layer or the third protocol layer, and the third protocol The layer includes at least one of PC5 radio resource control RRC layer, PC5-S protocol layer, and PC5-D; and the first positioning message is delivered to the first protocol layer through the second protocol layer, wherein, The second protocol layer is adjacent to the first protocol layer, and the first protocol layer is used to provide the positioning function on the PC5 interface.

Alternatively, the processor 1410 is used to generate the first positioning data at the first protocol layer, where the first protocol layer is used to provide the positioning function on the PC5 interface; the radio frequency unit 1401 is used to generate the first positioning data at the first protocol layer. The generated first positioning data is submitted to the V2X layer of the Internet of Vehicles, where the first protocol layer is adjacent to the V2X layer, and the V2X layer sends the first positioning data to the second terminal through the PC5 interface. Location data.

Alternatively, the radio frequency unit 1401 is configured to receive the first positioning data sent by the first terminal through the PC5 interface at the V2X layer of the Internet of Vehicles; and submit the first positioning data to the first protocol layer through the V2X layer, wherein, The first protocol layer is adjacent to the V2X layer, and the first protocol layer is used to provide positioning function on the PC5 interface.

It can be understood that the implementation process of each implementation manner mentioned in this embodiment can refer to the relevant descriptions in method embodiments 200-800, and achieve the same or corresponding technical effects. To avoid duplication, they will not be described again here.

Embodiments of the present application also provide a readable storage medium. Programs or instructions are stored on the readable storage medium. When the program or instructions are executed by a processor, each process of the above SL communication method embodiment is implemented, and can achieve The same technical effects are not repeated here to avoid repetition.

Wherein, the processor is the processor in the terminal described in the above embodiment. The readable storage medium includes computer readable storage media, such as computer read-only memory ROM, random access memory RAM, magnetic disk or optical disk, etc.

An embodiment of the present application further provides a chip. The chip includes a processor and a communication interface. The communication interface and The processor is coupled, and the processor is used to run network-side device programs or instructions to implement each process of the above-mentioned SL communication method embodiment, and can achieve the same technical effect. To avoid duplication, the details will not be described here.

It should be understood that the chips mentioned in the embodiments of this application may also be called system-on-chip, system-on-a-chip, system-on-chip or system-on-chip, etc.

Embodiments of the present application also provide a computer program product. The computer program product includes a processor, a memory, and a program or instructions stored on the memory and executable on the processor. The program or instructions are used by the processor. When the processor is executed, each process of the above SL communication method embodiment is implemented, and the same technical effect can be achieved. To avoid duplication, the details will not be described here.

An embodiment of the present application also provides a communication system, including: a first terminal and a second terminal. The first terminal can be used to perform the steps described in method embodiments 200-600 as described above. The second terminal The terminal may be used to perform the steps of the method described in method embodiments 700-800 as described above.

It should be noted that, in this document, the terms "comprising", "comprises" or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article or device that includes a series of elements not only includes those elements, It also includes other elements not expressly listed or inherent in the process, method, article or apparatus. Without further limitation, an element defined by the statement "comprises a..." does not exclude the presence of additional identical elements in a process, method, article or apparatus that includes that element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, but may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved. Functions may be performed, for example, the methods described may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus the necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases the former is better. implementation. Based on this understanding, the technical solution of the present application can be embodied in the form of a computer software product that is essentially or contributes to the existing technology. The computer software product is stored in a storage medium (such as ROM/RAM, disk , CD), including several instructions to cause a terminal (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in various embodiments of this application.

The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above-mentioned specific implementations. The above-mentioned specific implementations are only illustrative and not restrictive. Those of ordinary skill in the art will Inspired by this application, many forms can be made without departing from the purpose of this application and the scope protected by the claims, all of which fall within the protection of this application.

Claims (33)

A side-link SL communication method, which includes: The first terminal generates the first positioning message through the first protocol layer, where the first protocol layer is used to provide the positioning function on the PC5 interface; The first terminal delivers the first positioning message generated by the first protocol layer to a second protocol layer, wherein the second protocol layer is adjacent to the first protocol layer, and the second protocol layer The layer includes a Packet Data Convergence Protocol PDCP layer or a third protocol layer, and the third protocol layer includes at least one of the PC5 Radio Resource Control RRC layer, the PC5-S protocol layer, and the PC5-D; The first terminal sends the first positioning message to the second terminal through the PC-5 interface at the second protocol layer. The method of claim 1, wherein the first terminal sends the first positioning message to the second terminal through the PC5 interface at the second protocol layer, including: The first terminal sends the first positioning message to the second terminal on the PC5 interface through a first bearer at the second protocol layer, where the first bearer is dedicated to carrying the first protocol layer. information. The method of claim 2, wherein, in the case where the second protocol layer is the PDCP layer, the first terminal communicates to the PC-5 interface through the first bearer in the second protocol layer. The second terminal sends the first positioning message, including: Based on the first positioning message, the first terminal generates a first PDCP protocol data unit PDU through the first PDCP entity, and submits the first PDCP PDU to the first radio link control RLC entity, wherein, the The first PDCP entity corresponds to the first bearer; The first RLC entity generates a first RLC PDU based on the first PDCP PDU, and submits the first RLC PDU to the first medium access control MAC entity; The first MAC entity generates a first MAC PDU based on the first RLC PDU, and submits the first MAC PDU to the physical layer PHY; The PHY sends the first MAC PDU to the second terminal through the PC5 interface. The method according to claim 2 or 3, wherein when the second protocol layer is the PDCP layer, the first bearer is an SL signaling bearer SRB or an SL data bearer DRB. The method of claim 4, wherein when the first bearer is SL-SRB, the first bearer is different from any one of SL-SRB3, SL-SRB2, SL-SRB1, and SL-SRB0. One item. The method of claim 5, wherein the MAC header of the first MAC PDU includes a logical channel identifier LCID corresponding to the first bearer. The method of claim 4, wherein when the first bearer is the SL-DRB, the first PDCP PDU includes a protocol data unit SDU type field, and the SDU type field contains a first Indication information, the first indication information is used to instruct the first protocol layer. The method of claim 2, wherein, when the second protocol layer is the PC5-RRC layer, the first terminal sends the second terminal at the second protocol layer through the PC5 interface. The first positioning message includes: The first terminal generates a first PC5-RRC message at the PC5-RRC layer, and delivers the first PC5-RRC message to the second PDCP entity, where the first PC5-RRC message contains container information. element, the container information element carries the first positioning message, and the second PDCP entity corresponds to the first bearer; The second PDCP entity generates a second PDCP PDU based on the first PC5-RRC message, and delivers the second PDCP PDU to the second RLC entity; The second RLC entity generates a second RLC PDU based on the second PDCP PDU, and submits the second RLC PDU to the second MAC entity; The second MAC entity generates a second MAC PDU based on the second RLC PDU, and submits the second MAC PDU to the PHY; The PHY sends the second MAC PDU to the second terminal through the PC5 interface. The method of claim 8, wherein the first PC5-RRC message is dedicated to transmitting messages of the first protocol layer. The method of claim 8, wherein when the second protocol layer is the PC5-RRC layer, the first bearer is SL-SRB3. The method according to any one of claims 8-10, wherein the second protocol layer includes at least one of the PC5-S protocol layer, the PC5-D protocol layer and the PC5- In the case of the RRC layer, the first terminal delivers the first positioning message to the second protocol layer at the first protocol layer, including: When the SL unicast connection between the first terminal and the second terminal has been established, the first terminal delivers the first positioning message to the PC5- at the first protocol layer. RRC layer; When the SL unicast connection between the first terminal and the second terminal is not established, the first terminal delivers the first positioning message generated by the first protocol layer to the PC5 -S protocol layer or the PC5-D protocol layer. A side-link SL communication method, which includes: The second terminal receives the first positioning message sent by the first terminal on the PC5 interface through the second protocol layer, where the second protocol layer includes the Packet Data Convergence Protocol PDCP layer or the third protocol layer, and the third protocol layer includes At least one of the PC5 radio resource control RRC layer, PC5-S protocol layer, and PC5-D; The second terminal delivers the first positioning message to the first protocol layer through the second protocol layer, wherein the second protocol layer is adjacent to the first protocol layer, and the first protocol layer Used to provide positioning function on PC5 interface. The method of claim 12, wherein the second terminal delivers the first positioning message to the first protocol layer through the second protocol layer, including: The second terminal delivers the first positioning message to the first protocol layer through the first bearer at the second protocol layer. The method of claim 13, wherein when the second protocol layer is the PDCP layer, the second terminal receives the message sent by the first terminal through the PC5 interface at the second protocol layer. The first positioning message information, including: The second terminal receives the first MAC PDU sent by the first terminal through the PC5 interface in the physical layer PHY, and submits the first MAC PDU to the third MAC entity, wherein the first MAC PDU is identical to the first MAC PDU. The first positioning message corresponds to; The third MAC entity generates a first RLC PDU according to the first MAC PDU, and delivers the first RLC PDU to the third RLC entity; The third RLC entity generates a first PDCP PDU according to the first RLC PDU, and delivers the first PDCP PDU to a third PDCP entity, where the third PDCP entity corresponds to the first bearer; The third PDCP entity determines the first positioning message according to the first PDCP PDU. The method of claim 13 or 14, wherein when the second protocol layer is the PDCP layer, the first bearer is a SL signaling bearer SRB or an SL data bearer DRB. The method of claim 15, wherein when the first bearer is an SL-SRB, the first bearer is determined based on the logical channel identifier LCID carried in the first MAC PDU. The method according to any one of claims 14 to 16, wherein the first bearer is different from any one of SL-SRB3, SL-SRB2, SL-SRB1, and SL-SRBO. The method of claim 15, wherein when the first bearer is SL-DRB, the first bearer is determined according to the first indication information contained in the SDU type field, and the first PDCP PDU Includes the SDU type field. The method of claim 13, wherein when the second protocol layer is the PC5-RRC layer, the second terminal receives the first positioning message sent by the first terminal through the PC5 interface at the second protocol layer. ,include: The second terminal receives the second MAC PDU sent by the first terminal through the PC5 interface in the PHY, and submits the second MAC PDU to the fourth MAC entity; The fourth MAC entity generates a second RLC PDU according to the second MAC PDU, and delivers the second RLC PDU to the fourth RLC entity; The fourth RLC entity generates a second PDCP PDU according to the second RLC PDU, and delivers the second PDCP PDU to a fourth PDCP entity, and the fourth PDCP entity corresponds to the first bearer; The fourth PDCP entity generates a first PC5-RRC message according to the second PDCP PDU, and delivers the first PC5-RRC message to the PC5-RRC layer, where the first PC5-RRC message Container information elements are included, and the first positioning message is carried in the container information elements. The method of claim 19, wherein when the second protocol layer is the PC5-RRC layer, the first bearer is SL-SRB3. The method of claim 19, wherein when the second protocol layer includes at least one of the PC5-S protocol layer, the PC5-D protocol layer and the PC5-RRC layer, The second terminal delivers the first positioning message to the first protocol layer through the second protocol layer, including: When the SL unicast connection between the first terminal and the second terminal has been established, the second terminal Submit the first positioning message to the first protocol layer through the PC5-RRC layer; When the SL unicast connection between the first terminal and the second terminal is not established, the second terminal uses the PC5-S protocol layer or the PC5-D protocol layer. A certain positioning message is delivered to the first protocol layer. A side-link SL communication method, which includes: The first terminal generates first positioning data at the first protocol layer, where the first protocol layer is used to provide the positioning function on the PC5 interface; The first terminal submits the first positioning data generated in the first protocol layer to the V2X layer of connected vehicles, where the first protocol layer is adjacent to the V2X layer; The first terminal sends the first positioning data to the second terminal through the PC5 interface at the V2X layer. The method of claim 22, wherein the first terminal sends the first positioning data to the second terminal through the PC5 interface at the V2X layer, including: The V2X entity maps the first positioning data into a positioning service quality QoS flow according to the preconfigured PC5 QoS rules and then submits it to the service data adaptation protocol SDAP entity. The positioning QoS flow has a PC5 QoS flow identifier PQFI; The SDAP entity generates a first SDAP PDU based on the positioning QoS flow, and delivers the first SDAP PDU to the PDCP entity; The PDCP entity generates a first PDCP PDU based on the first SDAP PDU, and submits the first PDCP PDU to the radio link control RLC entity; The RLC entity generates a first RLC PDU based on the first PDCP PDU, and submits the first RLC PDU to the medium access control MAC entity; The MAC entity generates a first MAC PDU based on the first RLC PDU, and submits the first MAC PDU to the physical layer PHY; The PHY sends the first MAC PDU to the second terminal through the PC5 interface. The method of claim 22, wherein the first terminal sends the first positioning data to the second terminal through the PC5 interface at the V2X layer, including: The V2X entity generates a first V2X PDU based on the first positioning data, and submits the first V2X PDU to the SDAP entity; The SDAP entity generates a second SDAP PDU based on the first V2X PDU, and delivers the second SDAP PDU to the PDCP entity; The PDCP entity generates a second PDCP PDU based on the second SDAP PDU, and delivers the second PDCP PDU to the RLC entity, wherein the second PDCP PDU at least includes an SDU type field, and the SDU type field contains second indication information, the second indication information is used to indicate the first protocol layer; The RLC entity generates a second RLC PDU based on the second PDCP PDU, and submits the second RLC PDU to the MAC entity; The MAC entity generates a second MAC PDU based on the second RLC PDU, and converts the second MAC PDU PDU is submitted to PHY; The PHY sends the second MAC PDU to the second terminal through the PC5 interface. A side-link SL communication method, which includes: The second terminal receives the first positioning data sent by the first terminal through the PC5 interface at the V2X layer of the Internet of Vehicles; The second terminal submits the first positioning data to a first protocol layer through the V2X layer, wherein the first protocol layer is adjacent to the V2X layer, and the first protocol layer is used to provide PC5 Positioning functionality on the interface. The method of claim 25, wherein the second terminal receives the first positioning data sent by the first terminal through the PC5 interface at the V2X layer, including: The second terminal receives the first MAC PDU sent by the first terminal through the PC5 interface at the physical layer PHY, and submits the first MAC PDU to the MAC entity, wherein the first MAC PDU is the same as the first MAC PDU. Certain positioning data corresponds; The MAC entity generates a first RLC PDU according to the first MAC PDU, and submits the first RLC PDU to the RLC entity; The RLC entity generates a first PDCP PDU based on the first RLC PDU, and delivers the first PDCP PDU to the PDCP entity; The PDCP entity generates a first SDAP PDU based on the first PDCP PDU, and delivers the first SDAP PDU to the SDAP entity; The SDAP entity determines the positioning QoS flow according to the first SDAP PDU, and delivers the positioning QoS flow to the V2X entity according to the PC5 QoS flow identifier PQFI in the positioning QoS flow; The V2X entity maps the positioning QoS flow to the first positioning data according to the preconfigured PC5 QoS rules. The method of claim 25, wherein the second terminal receives the first positioning data sent by the first terminal through the PC5 interface at the V2X layer, including: The second terminal receives the second MAC PDU sent by the first terminal through the PC5 interface in the PHY, and delivers the second MAC PDU to the MAC entity, where the second MAC PDU is consistent with the first positioning data correspondence; The MAC entity generates a second RLC PDU based on the second MAC PDU, and delivers the second RLC PDU to the RLC entity; The RLC entity generates a second PDCP PDU based on the second RLC PDU, and delivers the second PDCP PDU to the PDCP entity; The PDCP entity determines the SDU type field included in the second PDCP PDU, and when the SDU type field contains the second indication information, generates a second SDAP PDU according to the second PDCP PDU, and The second SDAP PDU is delivered to the SDAP entity; The SDAP entity generates a second V2X PDU based on the second SDAP PDU, and delivers the second V2X PDU to the V2X entity; The V2X entity determines the first positioning data according to the second V2X PDU. A communication device for a side link SL, which includes: A first generation module configured to generate a first positioning message through a first protocol layer, wherein the first protocol layer is used to provide a positioning function on the PC5 interface; A first transmission module, configured to deliver the first positioning message generated by the first protocol layer to a second protocol layer, where the second protocol layer is adjacent to the first protocol layer, and the third protocol layer The second protocol layer includes a Packet Data Convergence Protocol PDCP layer or a third protocol layer, and the third protocol layer includes at least one of PC5 Radio Resource Control RRC layer, PC5-S protocol layer, and PC5-D; and in the third protocol layer The second protocol layer sends the first positioning message to the second terminal through the PC-5 interface. A communication device for a side link SL, which includes: The second transmission module is used for the second terminal to receive the first positioning message sent by the first terminal on the PC5 interface through the second protocol layer, where the second protocol layer includes the Packet Data Convergence Protocol PDCP layer or the third protocol layer, The third protocol layer includes at least one of PC5 radio resource control RRC layer, PC5-S protocol layer, and PC5-D; and the first positioning message is submitted to the first protocol layer through the second protocol layer , wherein the second protocol layer is adjacent to the first protocol layer, and the first protocol layer is used to provide the positioning function on the PC5 interface. A communication device for a side link SL, which includes: The second generation module is used to generate the first positioning data at the first protocol layer, where the first protocol layer is used to provide the positioning function on the PC5 interface; A third transmission module, configured to submit the first positioning data generated in the first protocol layer to the V2X layer of connected vehicles, where the first protocol layer is adjacent to the V2X layer; and The V2X layer sends the first positioning data to the second terminal through the PC5 interface. A communication device for a side link SL, which includes: The fourth transmission module is used to receive the first positioning data sent by the first terminal through the PC5 interface at the V2X layer of the Internet of Vehicles; and submit the first positioning data to the first protocol layer through the V2X layer, wherein, The first protocol layer is adjacent to the V2X layer, and the first protocol layer is used to provide positioning function on the PC5 interface. A terminal, which includes a processor and a memory. The memory stores programs or instructions that can be run on the processor. When the program or instructions are executed by the processor, any one of claims 1 to 11 is implemented. The steps of the method described in the item, or the steps of realizing the method as described in any one of claims 12 to 21, or the steps of realizing the method as described in any one of claims 22 to 24, or the steps of realizing the method as claimed in claim 25 to the steps of the method described in any one of 27. A readable storage medium, wherein a program or instructions are stored on the readable storage medium, and when the program or instructions are executed by a processor, the steps of the method according to any one of claims 1 to 11 are implemented, or the steps of the method are implemented. The steps of the method according to any one of claims 12 to 21, or the steps for realizing the method according to any one of claims 22 to 24, or the steps for realizing the method according to any one of claims 25 to 27 step.