WO2018145292A1

WO2018145292A1 - Communication method, device, and system

Info

Publication number: WO2018145292A1
Application number: PCT/CN2017/073204
Authority: WO
Inventors: 肖潇; 曹振臻
Original assignee: 华为技术有限公司
Priority date: 2017-02-10
Filing date: 2017-02-10
Publication date: 2018-08-16

Abstract

Disclosed in the embodiments of the present invention are a communication method, device, and system, belonging to the field of communication technologies. The communication method comprises: a first terminal determining, according to first mapping relation configuration information, the data priority corresponding to the identifier of a first radio bearer, the first radio bearer being configured by an access network device for the first terminal, the first mapping relation configuration information comprising the mapping relation between the identifier of the radio bearer of the first terminal and the data priority, the mapping relation being configured by the access network device for the first terminal; and the first terminal sending to a second terminal, according to the determined data priority, data to be transmitted corresponding to the first radio bearer. By configuring the first mapping relation configuration information for the first terminal by means of the access network device, the invention can determine the data priority of the data to be transmitted according to the identifier of the first radio bearer, and further can ensure the efficient transmission of the data of high-priority services.

Description

Communication method, device and system

Technical field

The present application relates to the field of communications technologies, and in particular, to a communication method, apparatus, and system.

Background technique

With the advent and increasing popularity of smart watches, smart bracelets, and smart glasses, wearable devices have become more popular and popular. Wearable device-based applications and communication technologies for wearable devices are also known as research hotspots in the global communications industry.

As a typical application scenario of a wearable device, a wearable device usually establishes a wireless connection with a cellular network and communicates through a smart phone, so that the user can directly access various applications on the wearable device (English: Application, Abbreviation: APP), data transmission with various networks and networks. The communication mode of the wearable device relayed by other terminals (also referred to as relay terminals) is also called user equipment (English: User Equipment, UE for short) - network relay (UE-to-Network) Relay) transmission.

There are many types of services for wearable devices, including voice services, instant messaging, email interaction, file transfer, web browsing, image transmission, and video streaming. Each type of service usually has a different data transmission priority. Therefore, wearable devices need to be able to effectively support multiple service transmissions with different priorities. However, in the current UE-network relay transmission, the transmission mode of distinguishing the transmission priority of data cannot be supported between the wearable device and the relay terminal.

Summary of the invention

In order to solve the problem that the transmission mode of the data transmission priority is not supported between the wearable device and the relay terminal in the UE-network relay transmission in the prior art, the embodiment of the present invention provides a communication method and device. system.

In a first aspect, the embodiment of the present invention provides a communication method, where the method includes: determining, by the first terminal, the data priority corresponding to the identifier of the first radio bearer according to the first mapping relationship configuration information, where the first radio bearer The access network device is configured for the first terminal, and the first mapping relationship configuration information includes a mapping relationship between the identifier of the radio bearer of the first terminal and a data priority, where the mapping relationship is the access network device. For the first terminal, the first terminal sends the data to be transmitted corresponding to the first radio bearer to the second terminal according to the determined data priority.

The radio bearer of the first terminal refers to a radio bearer between the first terminal and the access network device (for example, a radio bearer facing the Uu interface), and the data to be transmitted refers to data that the first terminal is to transmit to the access network device. The first terminal may determine the data priority corresponding to the identifier of the first radio bearer of the first terminal by using the first mapping relationship configuration information, that is, the data priority may be differentiated according to the identifier of the radio bearer, and the data to be transmitted according to the corresponding priority The method is sent to the second terminal and sent to the access network device via the second terminal, so that efficient transmission of high priority data can be ensured. Moreover, the first mapping relationship configuration information is configured and sent by the access network device, and does not need to change the wireless protocol stack of the terminal, and is easy to be promoted and implemented.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the first terminal according to the determined And the data priority is sent to the second terminal, where the data to be transmitted corresponding to the first radio bearer is mapped to the determined data. The data priority corresponds to the PC5 interface logical channel; the first terminal uses the PC5 interface to send the to-be-transmitted data to the second terminal.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, if the first terminal needs to transmit data, the first terminal has not established the corresponding data to be transmitted. The radio bearer needs to obtain the configuration information of the radio bearer corresponding to the data to be transmitted through the service service request information. In this case, the method further includes: the first terminal sending a service to the access network device And transmitting, by the first terminal, the radio bearer configuration information that is sent by the access network device, where the radio bearer configuration information includes an identifier of the first radio bearer, where the first radio bearer is the access network The device is configured for the service corresponding to the service transmission request. If the first terminal needs to transmit the service data, and the radio bearer has been established for the service data, the method further includes: determining, by the first terminal, the first radio bearer corresponding to the service according to the service to which the data to be transmitted belongs Logo.

With the first aspect or the first or second possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, the method further includes: the first terminal receiving the The first mapping relationship configuration information sent by the network access device. After configuring the radio bearer for the service data of the first terminal, the access network device can configure the mapping relationship between the radio bearer and the data priority, and notify the configured mapping relationship (ie, the first mapping relationship configuration information) a terminal.

With reference to the first aspect, or any one of the first to third possible implementation manners of the first aspect, in a fourth possible implementation manner of the first aspect, the method further includes: Adding a data packet header to the to-be-transmitted data, where the data packet header carries an identifier of the first radio bearer. After receiving the data sent by the first terminal, the second terminal may obtain the identifier of the first radio bearer from the data packet carried by the data, and determine the identifier of the second radio bearer corresponding to the identifier of the first radio bearer. The second radio bearer is a radio bearer between the second terminal and the access network device, and the second radio bearer can be used to send data of the first terminal to the access network device. In the process, the second terminal only needs to obtain the identifier of the first radio bearer from the data packet header, and does not need to submit the received data to the upper layer processing, so that the data can be completed without parsing the data of the first terminal. Forwarding improves the security of the data of the first terminal.

With reference to the first aspect, or any one of the first to third possible implementation manners of the first aspect, in a fifth possible implementation manner of the first aspect, the method further includes: And receiving the second mapping relationship configuration information that is sent by the access network device by using the second terminal, where the second mapping relationship configuration information includes an identifier of the radio bearer of the first terminal and an identifier of the radio bearer of the second terminal. Mapping relationship. The radio bearer of the second terminal refers to a radio bearer between the second terminal and the access network device (for example, a radio bearer facing the Uu interface).

With reference to the first aspect or the fifth possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, the method may further include: the first terminal according to the second mapping relationship Determining, by the configuration information, an identifier of the second radio bearer of the second terminal corresponding to the identifier of the first radio bearer; the first terminal adds a data packet header to the to-be-transmitted data, where the data packet header carries the The identifier of the second radio bearer. In this case, after receiving the data sent by the first terminal, the second terminal may obtain the identifier of the second radio bearer from the data packet header carried by the data, where the second radio bearer is the second terminal and the access network device. The wireless bearer between the two can further transmit the data of the first terminal to the access network device by using the second radio bearer. In the process, the second terminal only needs to obtain the identifier of the second radio bearer from the data packet header, and does not need to submit the received data to the upper layer for processing, so that the data can be completed without parsing the data of the first terminal. Forwarding improves the security of the data of the first terminal.

In a second aspect, the embodiment of the present invention provides a communication method, where the method includes: receiving, by the second terminal, data sent by the first terminal; and determining, by the second terminal, the identifier of the first radio bearer corresponding to the data, where The first radio bearer is configured by the access network device for the first terminal, and the second terminal determines the identifier of the second radio bearer corresponding to the identifier of the first radio bearer according to the second mapping relationship configuration information. The second mapping relationship configuration information includes a mapping relationship between the identifier of the radio bearer of the first terminal and the identifier of the radio bearer of the second terminal; the second terminal sends the data to the second radio bearer by using the second radio bearer The access network device.

After receiving the data sent by the first terminal, the second terminal may obtain the identifier of the first radio bearer from the data packet carried by the data, and determine the identifier of the second radio bearer corresponding to the identifier of the first radio bearer. The second radio bearer is a radio bearer between the second terminal and the access network device, and the second radio bearer can be used to send data of the first terminal to the access network device. In the process, the second terminal only needs to obtain the identifier of the first radio bearer from the data packet header, and does not need to submit the received data to the upper layer processing, so that the data can be completed without parsing the data of the first terminal. Forwarding ensures the security of the data of the first terminal.

With reference to the second aspect, in a first possible implementation manner of the second aspect, before the second terminal uses the second radio bearer to send the data to the access network device, the method further The method includes: the second terminal mapping the data to the second radio bearer.

With reference to the second aspect, or the first possible implementation manner of the second aspect, in a second possible implementation, the determining, by the second terminal, the identifier of the first radio bearer corresponding to the data, Obtaining an identifier of the first radio bearer in a data packet header carried by the data.

In a third aspect, the embodiment of the present invention provides a communication method, where the method includes: receiving, by the second terminal, data sent by the access network device; and determining, by the second terminal, the identifier of the first radio bearer corresponding to the data, The first radio bearer is configured by the access network device as the first terminal; the second terminal determines the data priority corresponding to the identifier of the first radio bearer according to the first mapping relationship configuration information, where the first radio bearer The mapping relationship configuration information includes a mapping relationship between the identifier of the radio bearer of the first terminal and the data priority, where the mapping relationship is that the access network device is configured for the first terminal, and the second terminal according to the determined The data priority is sent to the first terminal.

With the third aspect, in a first possible implementation manner of the third aspect, the second terminal sends the data to the first terminal according to the determined data priority, including: the second The terminal maps the data corresponding to the second radio bearer to the determined logical channel of the PC5 interface corresponding to the data priority; the second terminal sends the data to the first terminal by using a PC5 interface. .

With reference to the third aspect, or the first possible implementation manner of the third aspect, in a second possible implementation, the determining, by the second terminal, the identifier of the first radio bearer corresponding to the data, Obtaining an identifier of the first radio bearer in a data packet header carried by the data.

In a fourth aspect, the embodiment of the present invention further provides a communication method, where the method includes: configuring, by the access network device, a mapping relationship between the identifier of the radio bearer of the first terminal and the data priority for the first terminal; The network device sends the first mapping relationship configuration information, where the first mapping relationship configuration information includes the mapping relationship. Sending the first mapping relationship configuration information, so that the first terminal or the second terminal can determine the data priority according to the first mapping relationship configuration information, and then send the data according to the determined data priority, thereby ensuring high priority data. Effective transmission.

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the method further includes: the access network device sends a second mapping relationship configuration information, where the second mapping relationship configuration information includes the A mapping relationship between the identifier of the radio bearer of the first terminal and the identifier of the radio bearer of the second terminal. By sending the second mapping relationship configuration information, The first terminal or the second terminal can be configured to determine the identifier of the second radio bearer corresponding to the identifier of the first radio bearer according to the second mapping relationship configuration information, so that the data can be forwarded without the upper layer parsing data, and the data is improved. Security.

In the first to fourth aspects and various embodiments thereof, the data priority is the PC5 interface data priority.

In a fifth aspect, an embodiment of the present invention provides a communication apparatus, where the communication apparatus includes a unit, such as a determining unit and a sending unit, for implementing the method described in the above first aspect.

In a sixth aspect, the embodiment of the present invention further provides another communication apparatus, where the communication apparatus includes a unit, such as a receiving unit, a determining unit, and a sending unit, for implementing the method according to the second aspect.

In a seventh aspect, the embodiment of the present invention further provides another communication device, where the communication device includes a unit, such as a receiving unit, a determining unit, and a sending unit, for implementing the method described in the foregoing third aspect.

In an eighth aspect, the embodiment of the present invention further provides another communication device, where the communication device includes a unit, such as a configuration unit and a sending unit, for implementing the method described in the foregoing fourth aspect.

A ninth aspect, the embodiment of the present invention provides a communication system, where the system includes: an access network device, a first terminal, and a second terminal, where the first terminal includes any possible implementation of the fifth aspect. The communication device provided by the method, the second terminal includes the communication device provided by any one of the foregoing sixth aspect or the seventh aspect, wherein the access network device comprises any one of the foregoing eighth aspects A communication device provided by a possible implementation.

According to a tenth aspect, an embodiment of the present invention further provides a terminal, where the terminal includes a processor, a memory, and a transceiver; the processor, the memory, and the transceiver are coupled by a bus; the memory is configured to store program instructions, where The processor enables the terminal to perform the method of the first aspect or the second aspect or the third aspect by executing program instructions stored in the memory.

In an eleventh aspect, the embodiment of the present invention further provides a computer readable medium for storing program code for execution by a terminal, the program code comprising the method of performing the first aspect or the second aspect or the third aspect Instructions.

In a twelfth aspect, an embodiment of the present invention further provides an access network device, where the access network device includes a processor, a memory, and a transceiver; the processor, the memory, and the transceiver are coupled by a bus; the memory For storing program instructions, the processor enables the access network device to perform the method of the fourth aspect by executing program instructions stored in the memory.

In a thirteenth aspect, the embodiment of the present invention further provides a computer readable medium for storing program code for execution by an access network device, the program code comprising instructions for performing the method of the fourth aspect.

In a fourteenth aspect, the embodiment of the present invention further provides a communication chip, which is applied in a mobile communication system device, where the communication chip includes: a processor, a memory, and a communication interface; the processor, the memory, and the communication interface pass through the bus. Coupling, the memory for storing program instructions, the processor causing a communication system device loaded with the communication chip to perform the first aspect or the second aspect or the first aspect as described above by executing program instructions stored in the memory The method provided by any one of the three aspects or the fourth aspect.

DRAWINGS

1 is a schematic structural diagram of a communication system according to an embodiment of the present invention;

2 is a schematic diagram of a UE-network relay wireless protocol stack according to an embodiment of the present invention;

3 is a schematic structural diagram of a hardware of a terminal according to an embodiment of the present invention;

4 is a schematic structural diagram of hardware of an access network device according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of interaction of a communication method according to an embodiment of the present invention; FIG.

FIG. 6 is a schematic diagram of interaction of another communication method according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of interaction of still another communication method according to an embodiment of the present invention; FIG.

FIG. 8 is a schematic structural diagram of a communication apparatus according to an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of another communication apparatus according to an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of still another communication apparatus according to an embodiment of the present invention; FIG.

FIG. 11 is a schematic structural diagram of a communication chip according to an embodiment of the present invention.

detailed description

A "module" as referred to herein refers to a program or instruction stored in a memory that is capable of implementing certain functions; "unit" as referred to herein refers to a functional structure that is logically divided, the "unit" may be Pure hardware implementation, or a combination of hardware and software.

FIG. 1 shows a communication system provided by an embodiment of the present invention. The communication system 100 can be an LTE system, a 5G system, or a subsequent evolution system thereof. As shown in FIG. 1, the communication system includes an access network device 11, a first terminal 13, and a second terminal 12. The first terminal 13 is communicably connected to the access network device 11 in a manner that the second terminal 12 transits.

Further, the second terminal 12 and the access network device 11 are connected by a cellular network 15 (including an uplink (English: Uplink) and a downlink (English: Downlink)). The first terminal 13 and the second terminal 12 are communicably connected by a through link (English: Sidelink) 14. Specifically, in the embodiment of the present invention, the through link 14 is a device-to-device (English: Device-to-Device, D2D) through link.

In the uplink transmission direction, that is, the direction from the first terminal 13 to the access network device 11, when the first terminal 13 has data transmission, the first terminal 13 first transmits the data to the second terminal 12 through the through link 14, and then The second terminal 12 functions as a relay terminal, and transmits the received data to the access network device 11 through the cellular uplink. In the downlink transmission direction, that is, from the access network device 11 to the first terminal 13, the access network device 11 will first transmit data to the second terminal 12 through the cellular downlink, and then pass through the second terminal 12 through the direct connection. The link 14 sends it to the first terminal 13.

In the communication system shown in FIG. 1, the second terminal 12 may be a personal communication service (English: Personal Communication Service, PCS for short), a cordless telephone, and a Session Initiation Protocol (SIP). Telephone, wireless local loop (English: Wireless Local Loop, referred to as: WLL) station, personal digital assistant (English: Personal Digital Assistant, referred to as: PDA) and other equipment. The terminal can also be called a system, a subscriber unit (English: Subscriber Unit), a subscriber station (English: Subscriber Station), a mobile station (English: Mobile Station), a mobile station (English: Mobile), a remote station (English: Remote Station). Access point (English: Access Point), remote terminal (English: Remote Terminal), access terminal (English: Access Terminal), user terminal (English: User Terminal), user agent (English: User Agent), user equipment (English: User Device), or UE. The first terminal 13 may be a wearable device such as a smart bracelet, a smart watch, smart glasses, or the like.

The first terminal 13 communicates with one or more access network devices 140 via a radio access network (English: Radio Access Network, RAN for short).

The access network device 11 serves as a router between the first terminal 13 and the rest of the access network, and the rest of the access network may include an Internet Protocol (IP) network. Access network device 11 can also cooperate Adjust the attribute management of the air interface. For example, the access network device 11 may be a global mobile communication system (English: Global System for Mobile Communication, GSM for short) or a base transceiver station in a code division multiple access (CDMA) system. English: Base Transceiver Station (BTS), which can also be a base station (English: NodeB) in Wideband Code Division Multiple Access (WCDMA), or an eNB in LTE. The invention is not limited thereto.

Hereinafter, for convenience of description, the first terminal is referred to as a remote terminal, and the second terminal is referred to as a relay terminal, and an embodiment of the present invention is described in detail by taking an access network device as an eNB as an example.

Figure 2 shows a UE-network relay radio protocol stack for wearable device communication as defined in the 3rd Generation Partnership Project (3GPP) standard. As shown in FIG. 2, there is a packet data convergence protocol (English: Packet Data Convergence Protocol, PDCP) protocol stack (hereinafter referred to as Uu PDCP) for the Uu interface between the remote terminal and the access network device. In the Uu PDCP protocol stack, there are several radio bearers (English: Radio Bearer, RB for short) for data transmission of the remote terminal. In addition, under the Uu PDCP protocol stack of the remote terminal, there is an adaptation protocol layer (English: Adaptation Layer), which functions to add an adaptation layer data packet header to data in each radio bearer of the remote terminal. The adaptation layer data packet header includes the identifier of the remote terminal (English: User Equipment Identity, UE ID), which is used to enable the network side to distinguish data from different remote terminals, and then send the data to different core network gateways. The server performs subsequent processing.

Below the adaptation protocol layer is the PC5 interface wireless protocol stack, and the PC5 interface wireless protocol stack includes the radio link control layer (English: Radio Link Control, RLC for short) (PC5), media access control protocol (English: Medium Access) Control, abbreviation: MAC) (PC5) and physical layer (English: Physical, abbreviation: PHY) (PC5). The PC5 interface is an interface for direct data communication between the remote terminal and the relay terminal. It is an air interface corresponding to the LTE D2D technology defined in the 3GPP standard. The through link corresponding to the PC5 interface is the aforementioned "D2D straight link".

The data of the remote terminal submitted from the adaptation protocol layer will be processed by the PC5 interface wireless protocol stack, and the PC5 transmission resource is acquired in the D2D communication resource pool configured by the system, and then between the relay terminal and the remote terminal. Transfer. The data delivered from the adaptation protocol layer of the relay terminal or the remote terminal will be mapped to the corresponding PC5 interface logical channel for processing, and the data of each PC5 interface logical channel will be multiplexed at the MAC layer to form a MAC. The protocol data unit (English: MAC Protocol Packet Unit, MAC PDU for short) is then transmitted through the acquired PC5 transmission resource.

Although the current Rel-13D2D technology can implement priority processing on the PC5 interface, however, it requires the data packet to be delivered to the PC5 wireless protocol stack, and the higher-level protocol stack of the PC5 submits the PC5 interface data priority corresponding to the data packet ( English: ProSe Per-packet Priority, referred to as: PPPP) information to the PC5 wireless protocol stack, and then the PC5 wireless protocol stack of the terminal will establish a PC5 interface logical channel corresponding to the PC5 interface data priority, and map the data to the PC5. In the interface logical channel. In this way, data with different priorities will be mapped to the corresponding PC5 interface logical channel, and each logical channel corresponds to a different PC5 priority. The logical channel priority processing method of the PC5 interface is used to process data in the logical channel of the PC5 interface corresponding to different priorities, so as to achieve different priority differentiation and meet the requirements of different priority data transmission.

However, it can be seen from the "UE-network relay" wireless stack protocol shown in FIG. 2 that the U5 PDCP layer and the adaptation protocol layer are on the PC5 radio protocol stack of the remote terminal and the relay terminal instead of the PC5. The high-level protocol stack of the interface. Therefore, the data submitted to the PC5 interface will not carry the "PC5 interface data priority". So existing 3GPP defined UE-network The radio protocol stack can only use the D2D technology of the Rel-12. The actual priority of the service data cannot be distinguished on the PC5 interface. As a result, the high-priority service cannot obtain better processing and more transmission than the low-priority service. Resources, so that efficient transmission of data for high-priority services cannot be guaranteed.

To this end, the embodiment of the present invention provides a method for realizing the differentiation of service priorities without changing the wireless protocol stack of the terminal, which will be described in detail below.

In addition, in the UE-network relay technology based on the existing Rel-13D2D technology, the relay terminal delivers data from the remote terminal received from the PC5 interface to a higher layer protocol layer on the access layer, for example, The IP layer and the application layer are processed, and then are mapped to the corresponding uplink radio bearer of the relay terminal by using the service flow template on the non-access stratum of the Uu interface. However, due to the high-level protocol stack on the access layer, in the existing Rel-13D2D technology, the relay terminal can read the content of the data transmitted by the remote terminal, so that the privacy and security of the remote terminal are Sex cannot be guaranteed. To this end, the embodiment of the present invention further provides a method for mapping data to an appropriate Uu interface bearer at the access layer without submitting the data to the upper layer of the relay terminal, so as to ensure the remote terminal. Privacy and security of data transmission.

The terminal and the access network device provided by the embodiments of the present invention are described below in conjunction with a specific hardware structure.

FIG. 3 shows a hardware structure of a terminal 300 according to an embodiment of the present invention. The terminal 300 may be the first terminal or the second terminal, and may be a mobile terminal, such as a smart phone. As shown in FIG. 3, the terminal 300 includes a processor 31, a transceiver 32, and a memory 33.

The processor 31 includes one or more processing cores, and the processor 31 executes various functional applications and information processing by running software programs and modules.

The transceiver 32 includes a receiver Rx and a transmitter Tx. The transceiver 32 can also be implemented as a communication chip. The communication chip can include a receiving module, a transmitting module, a modem module, etc., for modulating and demodulating information. The information is received or transmitted via a wireless signal.

Transceiver 32, memory 33, and processor 31 are coupled by a bus. Memory 33 can be used to store software programs as well as modules. The memory can store an operating system 34, at least one functional application module 35.

When the terminal 300 is the foregoing first terminal, the application module 35 at least includes: a determining module 351a and a sending module 353a.

Alternatively, when the terminal 300 is the foregoing second terminal, the application module 35 at least includes: a receiving module 351b, a determining module 352b, and a sending module 353b.

Optionally, the processor 31 is configured to execute each module in the application module 35 to implement the steps required by the first terminal or the second terminal in FIGS. 5, 6, and 7.

Furthermore, the memory 33 is a computer readable storage medium that can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable and programmable Read Only Memory (EEPROM), Erasable Programmable Read Only Memory (EPROM), Programmable Read Only Memory (PROM), Read Only Memory (ROM), Magnetic Memory, Flash Memory, Disk or Optical Disk.

It will be understood by those skilled in the art that the structure of the terminal 300 shown in FIG. 3 does not constitute a limitation of the terminal, and may include more or less components or combinations of certain components, or different component arrangements.

FIG. 4 shows a hardware structure of an access network device 400 according to an embodiment of the present invention. The access network device 400 may be an eNB. As shown in FIG. 4, the access network device 400 includes a processor 41, a transceiver 42, and a memory 43.

The processor 41 includes one or more processing cores, and the processor 41 executes various functional applications and information processing by running software programs and modules.

The transceiver 42 includes a receiver Rx and a transmitter Tx. The transceiver 42 can also be implemented as a communication chip. The communication chip can include a receiving module, a transmitting module, a modem module, and the like, for modulating and demodulating information. The information is received or transmitted via a wireless signal.

Transceiver 42, memory 43, and processor 41 are coupled by a bus. Memory 43 can be used to store software programs as well as modules. The memory can store an operating system 44, at least one functional application module 45.

The application module 45 includes at least a receiving module 451, a determining module 452, and a transmitting module 453.

Optionally, the processor 41 is configured to execute each module in the application module 45 to implement the steps required by the access network device in FIGS. 5, 6, and 7.

Furthermore, the memory 43 is a computer readable storage medium that can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable and programmable Read Only Memory (EEPROM), Erasable Programmable Read Only Memory (EPROM), Programmable Read Only Memory (PROM), Read Only Memory (ROM), Magnetic Memory, Flash Memory, Disk or Optical Disk.

It will be understood by those skilled in the art that the structure of the access network device 400 shown in FIG. 4 does not constitute a limitation on the access network device, and may include more or less components or combinations of certain components than illustrated. Or different parts arrangement.

Referring to FIG. 5, a communication method provided by an embodiment of the present invention is shown, which is implemented by using the communication system shown in FIG. 1. In this embodiment, the uplink communication (that is, the remote terminal forwards data to the eNB through the relay terminal) is taken as an example for detailed description. In the embodiment shown in FIG. 5, the eNB sends the first mapping relationship configuration information to the remote terminal, so that the remote terminal can determine the data priority of the wireless interface (for example, the PC5 interface) of the data to be transmitted according to the first mapping relationship configuration information. And, the eNB sends the second mapping relationship configuration information to the relay terminal, so that the relay terminal can determine the radio bearer of the data to be forwarded from the remote terminal according to the second mapping relationship configuration information. The method includes:

S501: The remote terminal and the relay terminal respectively establish a UE-network relay wireless protocol stack.

When the remote terminal has data to perform uplink communication with the eNB, the remote terminal establishes a UE-network relay wireless protocol stack as shown in FIG. 2, and discovers through the relay on the PC5 interface (English: Relay Discovery) The technology finds a relay terminal and establishes a PC5 interface through link with the relay terminal. Then, the relay terminal also establishes a UE-network relay radio protocol stack as shown in FIG. 2. For the establishment of the relay discovery technology and the connection of the PC5 interface through link, the related process of the "UE-network relay" technology in the existing 3GPP protocol and the PC5 interface message format may be used, so detailed description is omitted here.

S502: The remote terminal performs radio resource control (English: Radio Resource Control, RRC for short) connection by means of the relay terminal.

The process of establishing an RRC connection may be related to the process of establishing an RRC connection between the terminal and the eNB in the existing LTE system, and the RRC message. The difference is that in the existing LTE system, when the terminal establishes an RRC connection with the eNB, the cellular network is directly used. The manner of communication, that is, the terminal directly sends the RRC message to the eNB through the cellular network uplink, and the eNB directly sends the RRC message to the terminal through the downlink of the cellular network. In the step S502, the remote terminal performs the interaction of the RRC message related to the establishment of the RRC connection with the eNB by means of the relay terminal forwarding, that is, the remote terminal sends the RRC message to the relay terminal, and the relay terminal will The received RRC message is forwarded to the eNB. Similarly, the eNB will send The RRC message to the remote terminal is sent to the relay terminal, and the relay terminal forwards the received RRC message to the remote terminal.

Specifically, the step S502 can be implemented in the following manner:

First, the remote terminal sends an RRC connection request message RRCconnectionRequest to the relay terminal through the through link, and the relay terminal forwards it to the eNB through the uplink;

Then, the eNB sends an RRC connection setup message RRCConnectionSetup to the relay terminal through the downlink, and forwards it to the remote terminal by the relay terminal;

Finally, the remote terminal sends an RRC connection setup complete message RRCConnectionSetupComplete to the relay terminal, and the relay terminal forwards the RRC connection setup to the eNB to complete the RRC connection establishment of the remote terminal.

The RRC connectionRequest, RRCConnectionSetup, and RRCConnectionSetupComplete messages in this process are the same as the RRC connection setup message of the existing LTE system, and a detailed description is omitted here.

After this step S502, the remote terminal and the relay terminal are in an RRC connected state, and the UE-network relay wireless protocol stack of layer 2 has been established.

S503: The remote terminal sends the service service request information to the eNB.

The service service request information may include a service type, that is, a type of service to which the data to be transmitted belongs.

Accordingly, the eNB receives the service service request information.

S504: The eNB sends the radio bearer configuration information and the first mapping relationship configuration information to the remote terminal.

The first mapping relationship configuration information includes a mapping relationship between the radio bearer identifier of the remote terminal and the PC5 interface data priority.

Specifically, the eNB establishes a radio bearer corresponding to the service to which the data to be transmitted belongs, and allocates a unique radio bearer identifier to the radio bearer to obtain radio bearer configuration information, and the eNB configures the identifier of the radio bearer. The data priority of the PC5 interface is obtained, and the first mapping relationship configuration information is obtained. Then, the eNB sends the configuration information of the radio bearer and the first mapping relationship configuration information to the remote terminal by means of forwarding by the relay terminal. Correspondingly, the remote terminal receives the configuration information of the radio bearer sent by the eNB and the first mapping relationship configuration information. The eNB can configure the mapping relationship between the identifier of the radio bearer and the data priority of the PC5 interface according to actual needs, which is not limited in this embodiment of the present invention.

Optionally, the first mapping relationship configuration information may be sent by the eNB to the remote terminal by using an RRC reconfiguration message RRC ConnectionReconfiguration in a manner that the relay terminal forwards.

The remote terminal may establish one or more radio bearers in the Uu PDCP protocol stack, and each radio bearer will respectively correspond to service data having the same service quality of service (QoS: QoS) and has unique The radio bearer identifies to uniquely identify the radio bearer. The remote terminal maps the service data with the same QoS requirements to the same radio bearer.

In the step S503-S504, when the remote terminal has the service data to be sent to the eNB, the remote terminal has not established the radio bearer corresponding to the service data, so that the service bearer needs to obtain the radio bearer corresponding to the service data. Configuration information and first mapping relationship configuration information. It should be noted that, if the remote terminal has the service data to be sent to the eNB and the remote terminal has established the radio bearer corresponding to the service data, the steps S503 and S504 may be omitted.

S505: The eNB sends the second mapping relationship configuration information to the relay terminal.

The second mapping relationship configuration information includes a mapping relationship between the identifier of the radio bearer of the remote terminal and the identifier of the radio bearer of the relay terminal.

Specifically, after establishing the radio bearer for the service data of the remote terminal, the eNB may also establish, for the relay terminal, the radio bearer of the relay terminal corresponding to the radio bearer established by the remote terminal, and allocate the radio bearer of the relay terminal. An identifier of the radio bearer, and sending the second mapping relationship configuration information to the relay terminal. Correspondingly, the relay terminal receives the second mapping relationship configuration information.

The radio bearer of the remote terminal refers to the radio bearer between the remote terminal and the eNB, and the radio bearer of the relay terminal refers to the radio bearer between the relay terminal and the eNB.

It should be noted that, optionally, the RRC message for transmitting the related information of the RRC connection establishment in step S502, the first mapping relationship configuration information in step S503, and the second mapping relationship configuration information in step S505 is on the PC5 interface. The above can be mapped to a dedicated logical channel of the PC5 interface, and the RRC message transmission is performed between the remote terminal and the relay terminal by using the PC5 interface dedicated logical channel; and on the Uu interface, it can be mapped to the dedicated wireless bearer ( For example, the dedicated signaling radio bearer is used, and the dedicated radio bearer is used to transmit the RRC message between the relay terminal and the eNB.

S506: The remote terminal adds a data packet header to the service data, where the data packet header includes an identifier of the first radio bearer corresponding to the service data.

The service data is the data to be transmitted that needs to be sent to the eNB. Specifically, the remote terminal submits the service data mapped to its radio bearer to the adaptation protocol layer, and adds a corresponding data packet header to the adaptation protocol layer, and the added data packet header may be referred to as an adaptation layer data packet header.

For all data mapped to the same bearer, the remote terminal will add the same radio bearer identifier in the adaptation layer packet header.

S507: The remote terminal determines the priority of the PC5 interface data corresponding to the identifier of the first radio bearer according to the first mapping relationship configuration information.

S508: The remote terminal sends the service data after adding the data packet header to the relay terminal according to the determined priority of the PC5 interface data.

Specifically, the step S508 may include:

The remote terminal maps the service data to the determined logical channel of the PC5 interface corresponding to the PC5 interface data priority;

The remote terminal sends the service data to the relay terminal by using the PC5 interface.

It should be noted that the remote UE can process related processes based on the logical channel priority (English: Logical Channel Prioritization) in the existing D2D technology, and reuse different services of the remote terminal to implement effective services for different priorities. Processing and transmission.

Through the above steps, the eNB configures a corresponding PC5 interface data priority for each radio bearer of the remote terminal by using the first mapping relationship configuration information, and according to the existing D2D communication technology, the remote terminal establishes the PC5 interface logic by itself. The channel, and each PC5 interface logical channel will correspond to a PC5 interface data priority. Therefore, for each remote terminal radio bearer, the remote terminal establishes a PC5 interface logical channel corresponding to the radio bearer of the remote terminal according to the first mapping relationship configuration information. Therefore, for each radio bearer of the remote terminal, the remote terminal may find the PC5 interface data priority information corresponding to the radio bearer according to the first mapping relationship configuration information, and map each data packet of the radio bearer to the corresponding PC5. On the interface logical channel.

Optionally, for a certain radio bearer of the remote terminal, if the remote terminal has established a corresponding logical channel of the PC5 interface, the remote UE only needs to directly map the data to the logical channel of the PC5 interface, and The establishment of the above logical channel of the PC5 interface is performed.

Correspondingly, the relay terminal receives the service data sent by the remote terminal through the PC5 interface.

S509: The relay terminal maps the service data from the remote terminal received from the PC5 interface to the second radio bearer of the relay terminal corresponding to the identifier of the first radio bearer according to the second mapping relationship configuration information.

Specifically, the relay terminal reads the first radio bearer identifier from the packet header of the adaptation protocol layer of the service data, and then finds the second radio bearer corresponding to the identifier of the first radio bearer from the second mapping relationship configuration information. And the service data is mapped to the second radio bearer to which the identifier of the second radio bearer belongs.

S510: The relay terminal sends the service data of the remote terminal received from the PC5 interface to the eNB.

After the relay terminal maps the service data of the remote terminal received through the PC5 interface to the second radio bearer, the relay terminal can use the uplink transmission technology in the existing LTE protocol to process data and forward the data. To the eNB. This step can completely adopt the uplink transmission technology and process in the existing LTE protocol, so detailed description is omitted here.

Referring to FIG. 6, a communication method provided by an embodiment of the present invention is shown, which is implemented by using the communication system shown in FIG. 1. In the present embodiment, the above communication is taken as an example for detailed description. In the embodiment shown in FIG. 6, the eNB sends the first mapping relationship configuration information and the second mapping relationship configuration information to the remote terminal, and the method includes:

S601: The remote terminal and the relay terminal respectively establish a UE-network relay wireless protocol stack.

For the specific implementation of the step S601, refer to S501, and details are not described herein again.

S602: The remote terminal performs an RRC connection with the access network device in a manner of forwarding by using the relay terminal.

For the specific implementation of the step S602, refer to S502, and details are not described herein again.

S603: The remote terminal sends the service service request information to the eNB.

S604: The eNB sends configuration information, first mapping relationship configuration information, and second mapping relationship configuration information of the radio bearer to the remote terminal.

For details about the configuration information of the radio bearer, the first mapping relationship configuration information, and the second mapping relationship configuration information, refer to steps S504 and S505. For the specific manner for the eNB to send the information to the remote terminal, refer to step S504, and detailed description is omitted here. .

S605: The remote terminal determines, according to the second mapping relationship configuration information, an identifier of the second radio bearer of the relay terminal corresponding to the identifier of the first radio bearer.

S606: The remote terminal adds a data packet header to the service data, where the data packet header includes an identifier of the second radio bearer.

For the specific implementation process of step S606, refer to step S506.

S607: The remote terminal determines, according to the first mapping relationship configuration information, a PC5 interface data priority corresponding to the identifier of the first radio bearer.

For the specific implementation process of step S607, refer to step S507.

S608: The remote terminal sends the service data to the relay terminal according to the determined priority of the PC5 interface data.

For the specific implementation process of step S608, refer to step S508.

S609: The relay terminal sends the service data of the remote terminal received from the PC5 interface to the eNB.

Specifically, the relay terminal acquires the identifier of the second radio bearer from the data packet carried by the service data, and then maps the service data received from the PC5 interface to the second radio bearer, and sends the service data by using the second radio bearer. To the eNB.

Referring to FIG. 7, a communication method provided by an embodiment of the present invention is shown, which is implemented by using the communication system shown in FIG. 1. In this embodiment, the following line communication is performed (ie, the eNB forwards the data to the remote terminal through the relay terminal) Give an example for a detailed description. In the embodiment shown in FIG. 7, the eNB sends the first mapping relationship configuration information to the relay terminal, so that the relay terminal can determine the data priority of the wireless interface (for example, PC5 interface) of the data to be transmitted according to the first mapping relationship configuration information. . Specifically, the method includes:

S701: The remote terminal and the relay terminal respectively establish a UE-network relay wireless protocol stack.

For the specific implementation of the step S701, refer to S501, and details are not described herein again.

S702: The remote terminal performs a radio resource control connection with the eNB in a manner of forwarding by using the relay terminal.

When the eNB has data to perform downlink communication with the remote terminal, the eNB will first perform paging (Paging) on the remote terminal through the relay terminal, and trigger the relay terminal to establish the UE-network relay as shown in FIG. 2. The wireless protocol stack, and triggering the relay terminal on the PC5 interface, through the relay discovery technology, discovers the remote terminal and establishes a PC5 interface through link connection with the remote terminal. Then, the remote terminal establishes a UE-network relay radio protocol stack as shown in FIG. 2. For related content, refer to the foregoing step S502, and details are not described herein again.

In the implementation, when the remote terminal establishes an RRC connection with the access network device through the relay terminal, the access network device saves the correspondence between the remote terminal and the relay terminal, so that the remote terminal needs to be paged, The remote terminal can be paged through the relay terminal.

S703: The eNB sends the first mapping relationship configuration information to the relay terminal.

The first mapping relationship configuration information includes a mapping relationship between the identifier of the radio bearer of the remote terminal and the data priority of the PC5 interface.

Specifically, in an implementation manner of the step S703, when the eNB side has the service data of the remote terminal arrives, if the current eNB has not established a radio bearer corresponding to the service data for the remote terminal, the eNB may For the service data of the remote terminal, the corresponding radio bearer (ie, the first radio bearer) is established for the remote terminal, and a radio bearer identifier is allocated to the radio bearer. And the eNB further establishes a second radio bearer corresponding to the first radio bearer for the relay terminal, allocates a radio bearer identifier to the second radio bearer, and sends the first mapping relationship configuration information to the relay terminal, where After the terminal configures the mapping between the identifier of the radio bearer of the remote terminal and the packet priority of the PC5 interface, the eNB may map the service data of the remote terminal to the first radio bearer.

When the eNB side has the service data of the remote terminal, the eNB can directly map the service data of the remote terminal to the radio bearer if the current eNB has established a radio bearer corresponding to the service data for the remote terminal. on.

Optionally, the first mapping relationship configuration information may be sent by the eNB to the relay terminal by using an RRC reconfiguration message. If the eNB establishes a radio bearer for the remote terminal and/or the relay terminal, the eNB needs to send the radio bearer configuration information to the corresponding terminal.

After the step, the eNB side corresponds to the Uu PDCP protocol layer established by the remote terminal, and the service data of the remote terminal is mapped to the corresponding radio bearer, and is subsequently delivered to the adaptation protocol layer and the downlink radio protocol. Stack, for subsequent data processing and transmission.

S704: The eNB adds a data packet header to the service data of the radio bearer corresponding to the remote terminal, where the data packet header carries the identifier of the first radio bearer.

S705: The eNB maps service data corresponding to the radio bearer of the remote terminal to the second radio bearer.

The eNB is the transmitting end of the downlink transmission. Therefore, the mapping relationship between the radio bearer of the remote terminal and the radio bearer of the relay terminal can be determined by the eNB itself without being sent to the corresponding terminal.

S706: The eNB sends the service data of the remote terminal and the identifier of the first radio bearer to the relay terminal.

Specifically, the eNB sends the service data mapped to the remote terminal on the second radio bearer to the relay terminal, and accordingly, The relay terminal receives the service data of the remote terminal sent by the eNB.

S707: The relay terminal determines, according to the identifier of the first radio bearer, the PC5 interface data priority corresponding to the identifier of the first radio bearer.

S708: The relay terminal sends the service data to the remote terminal according to the determined priority of the PC5 interface data.

For the specific implementation of the step S708, refer to step S508, and a detailed description is omitted here.

Correspondingly, the remote terminal receives the service data sent by the relay terminal, and maps the service data to the first radio bearer according to the identifier of the first radio bearer corresponding to the received data. Then, the remote terminal delivers data of the radio bearers of different remote terminals to the upper layer protocol stack for processing, and completes data reception.

The following is an apparatus embodiment of an embodiment of the present invention. For details not specifically described in the apparatus embodiment, refer to the corresponding method embodiment.

FIG. 8 shows a block diagram of a communication device provided by an embodiment of the present invention. The communication device can be implemented as a whole or a part of the first terminal by a dedicated hardware circuit or a combination of hardware and software. The communication device includes: a determining unit 801 and a sending unit 802, wherein the determining unit 801 is configured to determine, according to the first mapping relationship configuration information, a data priority corresponding to the identifier of the first radio bearer, where the first radio bearer is an access network. The device is configured for the first terminal, and the first mapping relationship configuration information includes a mapping relationship between the identifier of the radio bearer of the first terminal and the data priority, where the mapping relationship is that the access network device is configured for the first terminal, and the sending unit 802 And the data to be transmitted corresponding to the first radio bearer is sent to the second terminal according to the data priority determined by the determining unit 801.

Optionally, the determining unit 801 is further configured to determine, according to the service to which the data to be transmitted belongs, an identifier of the first radio bearer corresponding to the service.

Optionally, the device may further include: a receiving unit 803, where the sending unit 802 is further configured to send a service transmission request to the access network device, where the receiving unit 803 is configured to receive the radio bearer configuration information sent by the access network device, where The bearer configuration information includes an identifier of the first radio bearer, where the first radio bearer is configured by the access network device for the service corresponding to the service transmission request.

The receiving unit 803 is further configured to implement the receiving action performed by the first terminal in the method embodiment shown in FIG. 5, FIG. 6, and FIG. 7, for example, receiving the first mapping relationship configuration information, the second mapping relationship configuration information, and the like.

Optionally, the apparatus may further include an adding unit 804, configured to add a data packet header to the data to be transmitted. The identifier of the first radio bearer or the identifier of the second radio bearer is carried in the data packet header.

Related details may be combined with the method embodiments of FIGS. 5, 6, and 7.

It should be noted that the foregoing determining unit 801 and adding unit 804 may be implemented by a processor or may be implemented by a processor executing a program instruction in a memory, where the sending unit 802 may be implemented by a transmitter, or the processor may be implemented by using a transmitter; The above receiving unit 803 can be implemented by the receiver Rx, or the processor can be implemented with the receiver.

Figure 9 is a block diagram of a communication device provided by an embodiment of the present invention. The communication device can be implemented as a whole or a part of the second terminal by a dedicated hardware circuit or a combination of hardware and software. The communication device includes a receiving unit 901, a determining unit 902, and a transmitting unit 903.

In an implementation manner, the receiving unit 901 is configured to receive data sent by the first terminal. The determining unit 902 is configured to determine an identifier of the first radio bearer corresponding to the data received by the receiving unit 901, and configure the information according to the second mapping relationship. The identifier of the second radio bearer corresponding to the identifier of the first radio bearer is determined, where the second mapping relationship configuration information includes a mapping relationship between the identifier of the radio bearer of the first terminal and the identifier of the radio bearer of the second terminal. The sending unit 903 is configured to send data to the access network device by using the second radio bearer determined by the determining unit 902.

In another implementation, the receiving unit 901 is configured to receive data sent by the access network device. The determining unit 902 is configured to determine an identifier of the first radio bearer corresponding to the data received by the receiving unit 901, and determine, according to the first mapping relationship configuration information, a data priority corresponding to the identifier of the first radio bearer, and the first mapping relationship configuration information. The mapping between the identifier of the radio bearer of the first terminal and the data priority is included. The sending unit 903 is configured to send data to the first terminal according to the data priority determined by the 902 determining unit.

It should be noted that the foregoing determining unit 902 may be implemented by a processor or may be implemented by a processor executing a program instruction in a memory. The sending unit 903 may be implemented by a transmitter, or the processor may be implemented by using a transmitter; the receiving unit 901. It can be implemented by the receiver Rx, or the processor can be implemented with the receiver.

Figure 10 is a block diagram of a communication device provided by an embodiment of the present invention. The communication device can be implemented as a whole or a part of the access network device through a dedicated hardware circuit or a combination of hardware and software. The communication device includes a configuration unit 1001 and a transmission unit 1002. The configuration unit 1001 is configured to configure, for the first terminal, a mapping relationship between the identifier of the radio bearer of the first terminal and the data priority. The sending unit 1002 is configured to send first mapping relationship configuration information, where the first mapping relationship configuration information includes a mapping relationship configured by the configuration unit 1001.

It should be noted that the foregoing configuration unit 1001 may be implemented by a processor or the processor may execute a program instruction in a memory. The sending unit 1002 may be implemented by a transmitter, or the processor may be implemented by using a transmitter.

FIG. 11 is a schematic structural diagram of a communication chip according to an embodiment of the present invention, which is applied to a mobile communication system device, such as the foregoing access network device or terminal. The communication chip includes a processor 1110, a memory 1120, and a communication interface 1130. The processor 1110 is connected to the memory 1120 and the communication interface 1130 via a bus, respectively.

Communication interface 1130 is used to communicate with other communication devices.

Processor 1110 includes one or more processing cores. The processor 1110 runs an operating system or application module.

Optionally, the memory 1120 can store an operating system 1122, an application module 1124 required for at least one function. Optionally, the application module 1124 includes: a receiving module 1124a, a processing module 1124b, and a sending module 1124c. The receiving module 1124a is configured to implement steps related to receiving; the processing module 1124b is configured to implement steps related to computing or processing; and the transmitting module 1124c is configured to implement steps related to transmitting.

Moreover, memory 1120 can be implemented by any type of volatile or non-volatile storage device, or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read only memory (EEPROM), erasable In addition to Programmable Read Only Memory (EPROM), Programmable Read Only Memory (PROM), Read Only Memory (ROM), Magnetic Memory, Flash Memory, Disk or Optical Disk.

It will be understood by those skilled in the art that the structure shown in FIG. 11 does not constitute a limitation of the above-described communication chip, and may include more or less components or combinations of certain components, or different component arrangements.

The above description is only exemplary embodiments of the present invention, and is not intended to limit the present invention. Any modifications, equivalents, improvements, etc., which are within the spirit and scope of the present invention, should be included in the protection of the present invention. Within the scope.

Claims

A communication method, characterized in that the method comprises:

Determining, by the first terminal, the data priority corresponding to the identifier of the first radio bearer according to the first mapping relationship configuration information, where the first radio bearer is configured by the access network device for the first terminal, and the first mapping relationship The configuration information includes a mapping relationship between the identifier of the radio bearer of the first terminal and the data priority, where the mapping relationship is that the access network device is configured for the first terminal;

The first terminal sends the to-be-transmitted data corresponding to the first radio bearer to the second terminal according to the determined data priority.
The method according to claim 1, wherein the first terminal sends the data to be transmitted corresponding to the first radio bearer to the second terminal according to the determined data priority, including:

Mapping, by the first terminal, the data to be transmitted corresponding to the first radio bearer to the determined logical channel of the PC5 interface corresponding to the data priority;

The first terminal uses a PC5 interface to send the to-be-transmitted data to the second terminal.
The method according to claim 1 or 2, wherein the method further comprises:

Transmitting, by the first terminal, a service transmission request to the access network device;

Receiving, by the first terminal, the radio bearer configuration information that is sent by the access network device, where the radio bearer configuration information includes an identifier of the first radio bearer, where the first radio bearer is the access network device Describe the service configuration corresponding to the service transmission request;

Alternatively, the method further includes:

And determining, according to the service to which the data to be transmitted belongs, the identifier of the first radio bearer corresponding to the service.
The method according to any one of claims 1 to 3, wherein the method further comprises:

The first terminal receives the first mapping relationship configuration information sent by the access network device.
The method according to any one of claims 1 to 4, wherein the method further comprises:

The first terminal adds a data packet header to the to-be-transmitted data, where the data packet header carries an identifier of the first radio bearer.
The method according to any one of claims 1 to 4, wherein the method further comprises:

The first terminal receives the second mapping relationship configuration information that is sent by the access network device by using the second terminal, where the second mapping relationship configuration information includes an identifier of the radio bearer of the first terminal and the second terminal The mapping relationship of the identifiers of the radio bearers.
The method of claim 6 wherein the method further comprises:

Determining, by the first terminal, the identifier of the second radio bearer of the second terminal corresponding to the identifier of the first radio bearer according to the second mapping relationship configuration information;

The first terminal adds a data packet header to the to-be-transmitted data, where the data packet header carries an identifier of the second radio bearer.
The method according to any one of claims 1 to 7, wherein the data priority is a PC5 interface data priority.
A communication method, characterized in that the method comprises:

The second terminal receives the data sent by the first terminal;

Determining, by the second terminal, an identifier of the first radio bearer corresponding to the data, where the first radio bearer is an access network Prepared for the first terminal;

Determining, by the second terminal, the identifier of the second radio bearer corresponding to the identifier of the first radio bearer according to the second mapping relationship configuration information, where the second mapping relationship configuration information includes the identifier and location of the radio bearer of the first terminal a mapping relationship between the identifiers of the radio bearers of the second terminal;

The second terminal sends the data to the access network device by using the second radio bearer.
The method according to claim 9, wherein the method further includes: before the second terminal sends the data to the access network device by using the second radio bearer, the method further includes:

The second terminal maps the data to the second radio bearer.
The method according to claim 9, wherein the determining, by the second terminal, the identifier of the first radio bearer corresponding to the data comprises:

The second terminal acquires an identifier of the first radio bearer from a data packet header carried by the data.
A communication method, characterized in that the method comprises:

The second terminal receives data sent by the access network device;

Determining, by the second terminal, an identifier of the first radio bearer corresponding to the data, where the first radio bearer is configured by the access network device as the first terminal;

Determining, by the second terminal, the data priority corresponding to the identifier of the first radio bearer according to the first mapping relationship configuration information, where the first mapping relationship configuration information includes an identifier of the radio bearer of the first terminal and a data priority a mapping relationship, where the mapping relationship is configured by the access network device for the first terminal;

The second terminal sends the data to the first terminal according to the determined data priority.
The method according to claim 12, wherein the transmitting, by the second terminal, the data to the first terminal according to the determined data priority comprises:

The second terminal maps data corresponding to the second radio bearer to the determined logical channel of the PC5 interface corresponding to the data priority;

The second terminal sends the data to the first terminal by using a PC5 interface.
The method according to claim 12 or 13, wherein the determining, by the second terminal, the identifier of the first radio bearer corresponding to the data comprises:

The second terminal acquires an identifier of the first radio bearer from a data packet header carried by the data.
A communication method, characterized in that the method comprises:

The access network device configures, for the first terminal, a mapping relationship between the identifier of the radio bearer of the first terminal and the data priority;

The access network device sends the first mapping relationship configuration information, where the first mapping relationship configuration information includes the mapping relationship.
The method of claim 15 wherein the method further comprises:

The access network device sends the second mapping relationship configuration information, where the second mapping relationship configuration information includes a mapping relationship between the identifier of the radio bearer of the first terminal and the identifier of the radio bearer of the second terminal.
A communication device is applied to a first terminal, wherein the device comprises:

a determining unit, configured to determine, according to the first mapping relationship configuration information, data corresponding to the identifier of the first radio bearer The first radio bearer is configured by the access network device for the first terminal, and the first mapping relationship configuration information includes a mapping relationship between the identifier of the radio bearer of the first terminal and a data priority, where the mapping The relationship is that the access network device is configured for the first terminal;

And a sending unit, configured to send data to be transmitted corresponding to the first radio bearer to the second terminal according to the data priority determined by the determining unit.
The device according to claim 17, wherein the sending unit is configured to map the data to be transmitted corresponding to the first radio bearer to the determined logical channel of the PC5 interface corresponding to the data priority; The data to be transmitted is sent to the second terminal by using a PC5 interface.
The device according to claim 17 or 18, wherein the determining unit is further configured to determine an identifier of the first radio bearer corresponding to the service according to the service to which the data to be transmitted belongs; or

The device further includes: a receiving unit, the sending unit is further configured to send a service transmission request to the access network device, where the receiving unit is configured to receive radio bearer configuration information sent by the access network device, The radio bearer configuration information includes an identifier of the first radio bearer, where the first radio bearer is configured by the access network device for a service corresponding to the service transmission request.
The device according to any one of claims 17 to 19, further comprising: a receiving unit, configured to receive the first mapping relationship configuration information sent by the access network device, or Receiving the second mapping relationship configuration information that is sent by the access network device by using the second terminal, where the second mapping relationship configuration information includes an identifier of the radio bearer of the first terminal and a radio bearer of the second terminal The mapping relationship of the identity.
The device according to claim 20, wherein the device further comprises: an adding unit, the adding unit is configured to add a data packet header to the data to be transmitted, where the data packet header carries the first radio bearer Identification

Or the determining unit is further configured to determine, according to the second mapping relationship configuration information, an identifier of the second radio bearer of the second terminal corresponding to the identifier of the first radio bearer, and the device further includes adding a unit, the adding unit is configured to add a data packet header to the to-be-transmitted data, where the data packet header carries an identifier of the second radio bearer determined by the determining unit.
The apparatus according to any one of claims 17 to 21, wherein the data priority is a PC5 interface data priority.
A communication device is applied to a second terminal, wherein the device comprises:

a receiving unit, configured to receive data sent by the first terminal;

a determining unit, configured to determine an identifier of the first radio bearer corresponding to the data received by the receiving unit, where the first radio bearer is configured by the access network device for the first terminal; and configured according to the second mapping relationship Determining, by the information, the identifier of the second radio bearer corresponding to the identifier of the first radio bearer, where the second mapping relationship configuration information includes a mapping of the identifier of the radio bearer of the first terminal and the identifier of the radio bearer of the second terminal relationship;

And a sending unit, configured to send the data to the access network device by using the second radio bearer determined by the determining unit.
The apparatus according to claim 23, wherein the sending unit is further configured to map the data onto the second radio bearer.
A communication device is applied to a second terminal, wherein the device comprises:

a receiving unit, configured to receive data sent by the access network device;

a determining unit, configured to determine an identifier of the first radio bearer corresponding to the data received by the receiving unit, where the first radio bearer is configured by the access network device for the first terminal; and configured according to the first mapping relationship Determining, by the information, a data priority corresponding to the identifier of the first radio bearer, where the first mapping relationship configuration information includes a mapping relationship between an identifier of the radio bearer of the first terminal and a data priority, where the mapping relationship is the The network access device is configured for the first terminal;

And a sending unit, configured to send the data to the first terminal according to the data priority determined by the determining unit.
The device according to claim 25, wherein the sending unit is configured to map data corresponding to the second radio bearer to the determined logical channel of the PC5 interface corresponding to the data priority; using PC5 An interface that sends the data to the first terminal.
A communication device is applied to an access network device, wherein the device comprises:

a configuration unit, configured to configure, for the first terminal, a mapping relationship between the identifier of the radio bearer of the first terminal and the data priority;

And a sending unit, configured to send first mapping relationship configuration information, where the first mapping relationship configuration information includes the mapping relationship.
The apparatus according to claim 27, wherein the sending unit is further configured to send second mapping relationship configuration information, where the second mapping relationship configuration information includes an identifier of the radio bearer of the first terminal and the The mapping relationship of the identifiers of the radio bearers of the second terminal.
A communication system, characterized in that the system comprises a first terminal, a second terminal and an access network device, the first terminal comprising the device according to any one of claims 17-22, the second The terminal comprises a device according to any one of claims 23-24 or a device according to any one of claims 25-26, the access network device comprising the device according to any one of claims 27-28 Device.