WO2011116714A2

WO2011116714A2 - Method and device for communication between terminals

Info

Publication number: WO2011116714A2
Application number: PCT/CN2011/073446
Authority: WO
Inventors: 张伟; 张舜卿; 徐树公
Original assignee: 华为技术有限公司
Priority date: 2011-04-28
Filing date: 2011-04-28
Publication date: 2011-09-29
Also published as: WO2011116714A3; CN102172090B; CN102172090A

Abstract

A method and device for communication between terminals are provided in the embodiments of the present invention. The method includes that: a base station receives data which are mutually sent to each other by two terminals entering a direct communication mode, wherein both of the two terminals locate in a service area of the base station; the base station simultaneously transmit the received data to the two terminals, so that the two terminals respectively acquire data sent by each other. The embodiments of the present invention makes two terminals respectively acquire data sent by each other. In the embodiments of the present invention, a base station handles the received data, such as decoding and so on, thereby processing resources of the base station are saved, and wireless air interface resources are saved.

Description

Communication method and device between terminals

Technical field

The present invention relates to the field of communications technologies, and in particular, to a communication method and device between terminals. Background technique

With the development of communication technology and the popularity of intelligent terminals, in the future communication, real-time between terminals

L§ Wei Wei, right terminal and

Terminal-centric, data-sourced services will also gradually replace existing service provider-centric services. In addition, in future communications, there will be a large number of situations in which terminals within the service range of the base station communicate with each other.

In the prior art, for two terminals performing data interaction in the service area of the same base station, the base station needs to obtain the receiving end information according to the bearer identifier or the destination address of the data packet, find the corresponding downlink bearer link, and set the data by the bearer chain. The road is sent to the receiving end.

However, in the prior art, the base station needs to perform codec operation and data packet transmission on the data packets transmitted by each terminal, thereby wasting the processing resources of the base station and the wireless air interface resources. Summary of the invention

The embodiments of the present invention provide a communication method and device between terminals, which solves the problem of wasting the processing resources of the base station and the wireless air interface resources in the prior art.

An embodiment of the present invention provides a communication method between terminals, including:

Receiving, by the base station, data sent to the opposite end by two terminals entering the direct communication mode, where the two terminals are located in the service range of the base station;

The base station forwards the received data to the two terminals at the same time, so that the two terminals respectively acquire data sent by the opposite end.

An embodiment of the present invention provides another method for communication between terminals, including: The terminal that enters the direct communication mode forwards the data sent to the peer end to the base station, so that the base station forwards the received data to the terminal and the opposite end at the same time, and the terminal and the opposite end are located in the service range of the base station;

The terminal acquires data sent by the opposite end according to the received data forwarded by the base station.

The embodiment of the invention further provides a base station, including:

a receiving unit, configured to receive data sent to the opposite end by two terminals entering the direct communication mode, where the two terminals are located in a service range of the base station;

And a sending unit, configured to forward the data received by the receiving unit to the two terminals at the same time, so that the two terminals respectively obtain data sent by the opposite end.

The embodiment of the invention further provides a terminal, including:

a sending unit, configured to forward the data sent to the peer end to the base station, so that the base station simultaneously forwards the received data to the terminal and the opposite end, where the terminal and the opposite end are located at the base station Within the scope of services;

a receiving unit, configured to receive data forwarded by the base station;

And an acquiring unit, configured to acquire data sent by the opposite end according to the data received by the receiving unit. The method and device for communication between terminals provided by the embodiments of the present invention are located in two terminals within the service range of the same base station. After entering the direct communication mode, the two terminals send data sent to the opposite end to the base station, and the base station will receive the data. At the same time, the two terminals are forwarded to each other, so that the two terminals respectively obtain the data sent by the opposite end. In the embodiment of the present invention, the base station does not need to perform processing such as decoding the received data, which saves processing resources of the base station and saves wireless air interface resources. DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work. 1 is a flowchart of an embodiment of a method for communication between terminals according to the present invention; FIG. 2 is a flowchart of still another embodiment of a method for communication between terminals according to the present invention; FIG. 3 is a communication between terminals provided by the present invention. Method flow chart of another embodiment; FIG. 4 is a schematic structural diagram of an embodiment of a base station provided by the present invention;

FIG. 5 is a schematic structural diagram of still another embodiment of a base station according to the present invention; FIG.

FIG. 6 is a schematic structural diagram of an embodiment of a terminal provided by the present invention. detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

FIG. 1 is a flowchart of an embodiment of a method for communication between terminals according to the present invention. As shown in FIG. 1, the method includes:

S101. The base station receives data sent to the opposite end by two terminals entering the direct communication mode, where the two terminals are located in a service range of the base station;

S102: The base station forwards the received data to the two terminals at the same time, so that the two terminals respectively obtain data sent by the opposite end.

The method for communication between terminals according to the embodiment of the present invention is applicable to Long Term Evolution (LTE), Universal Mobile Telecommunications System (UMTS), Code Division Multiple Access (CDMA), and LTE. Subsequent evolution (LTE-Advanced; LTE-A) and various types of communication networks such as Worldwide Interoperability for Microwave Access (WiMAX).

The execution base station of the above steps may be an evolved base station (eNB), a base station (BS), a Node B, an access point, and the like. The base station may be a macro base station, a medium base station, or a micro base station, such as a home base station. Each base Stations can provide communication coverage for specific geographic areas. The two terminals involved in the embodiment of the present invention perform data interaction within the service range of the same base station, and the terminal may be a user equipment (UE), a mobile station (MS), and a subscriber unit. Station (station) and so on. The terminal can also be a cellular phone, a personal digital assistant (PDA), a wireless modem (modem), a wireless communication device, a handheld device, a laptop computer, a cordless phone ( Cordless phone ) , wireless local loop (WLL) station, etc.

When there are more than one service in two terminals located in the service area of the same base station, the base station may perform some judgments first, for example: the channel quality between the two terminals and the base station, and the traffic volume transmitted, when certain conditions are met. At the time, the base station can notify the specific services of the two terminals to perform a direct communication mode.

When the two terminals are in the direct communication mode, the base station can allocate the same uplink resource to the two terminals according to the traffic volume situation of the two terminals. The two terminals can send the service data sent to the peer end on the allocated uplink resources. For the base station, the base station allocates the same downlink resource to the two terminals according to the received data, and the base station forwards the data sent by the two terminals to the two terminals simultaneously on the allocated downlink resources. The data received by each terminal is the data superimposed by the data sent by the two terminals to the base station. Each terminal can further perform self-signal cancellation according to data previously sent to the base station, thereby obtaining data transmitted by the opposite end.

The communication method between the terminals provided by the embodiment of the present invention is located in the service range of the same base station. After entering the direct communication mode, the two terminals send data sent to the opposite end to the base station, and the base station simultaneously forwards the received data. Give two terminals, so that the two terminals respectively obtain the data sent by the peer. In the embodiment of the present invention, the base station performs processing such as decoding on the received data, thereby saving processing resources of the base station and saving wireless air interface resources.

2 is a flowchart of still another embodiment of a method for communication between terminals according to the present invention. As shown in FIG. 2, the method includes: 5201. The terminal that enters the direct communication mode forwards the data sent to the peer end to the base station, so that the base station forwards the received data to the terminal at the same time, where the terminal and the peer end are located in the service range of the base station;

S202: The terminal acquires data sent by the peer end according to the received data forwarded by the base station.

The execution subject terminal of the above steps may be any one of two terminals that enter the direct communication mode within the service range of the same base station.

When the two terminals are in the direct communication mode, the base station can allocate the same uplink resource to the two terminals according to the traffic volume situation of the two terminals. Each terminal can send the service data to the peer end on the allocated uplink resource. The base station sends the same downlink resource to the two terminals according to the received data, and the base station forwards the data sent by the two terminals to the two terminals simultaneously on the allocated downlink resource. At the time, the data received by each terminal is the sum of the data sent by the two terminals to the base station. Each terminal can further perform self-signal cancellation according to data previously sent to the base station, thereby obtaining data transmitted by the opposite end.

The method for communication between terminals according to the embodiment of the present invention is located in two terminals within the service range of the same base station. After entering the direct communication mode, each terminal sends data to the opposite end to the base station, and the base station simultaneously forwards the received data. For two terminals, each terminal can obtain the data sent by the peer from the received data. In the embodiment of the present invention, the base station performs processing such as decoding on the received data, thereby saving processing resources of the base station and saving wireless air interface resources.

FIG. 3 is a flowchart of another embodiment of a method for communication between terminals according to the present invention. As shown in FIG. 3, the method includes:

S301. The base station determines whether the two terminals UE1 and UE2 that establish the service meet the preset condition for entering the direct communication mode. If yes, execute S302, otherwise the process ends. The two terminals UE1 and UE2 are in the same base station service area, and at least one service is established between the UE1 and the UE2. The UE1 and the UE2 are in the process of establishing the service. When the connection is made, the base station determines whether the peer end is within the service range of the same base station according to the communication peer information carried in the signaling of the establishment service. If the peer end is within the service range of the same base station, the base station further determines whether the UE1 and the UE2 satisfy the preset. The condition of the direct communication mode is entered by the base station; the process of determining the S201 by the base station may also be performed when the UE 1 and the U E2 are switched to the service range of the base station, for example: during the handover process, the UE1 moves to the service range of the base station, and the base station is During the process of establishing a bearer, the UE1 obtains the peer information, so as to further determine whether the UE1 and the UE2 meet the preset conditions for entering the direct communication mode. The determining process performed by the base station in S201 may also be performed when the UE1 and the UE2 exit the idle mode, and the UE1 Or when the channel quality between the UE2 and the base station changes, for example: the base station learns UE1 and UE2 Communicate with each other under the same base station, but the channel quality between the two base stations does not satisfy the conditions for entering direct communication. The base station can detect the channel quality changes of UE1 and UE2 in real time. When the direct communication condition is met, the base station can trigger UE 1 and U E2 to enter the direct communication mode.

When performing the determination of S201, the base station may specifically according to UE1 and/or UE2 capabilities (capability of supporting direct communication mode), channel quality between UE1 and base station, channel quality between UE2 and base station, and UE1 and The traffic volume of each service between the base stations, and the traffic volume of each service between the UE2 and the base station are judged. For example, when the channel quality between the UE1 and the base station is substantially the same as the channel quality between the UE2 and the base station, and the traffic of the at least one service is substantially equal, the base station can achieve maximum gain in saving wireless transmission resources and transmitting power. Therefore, the base station can be substantially the same as the channel quality between the UE1 and the base station and the channel quality between the UE2 and the base station, and at least one traffic amount is substantially equal as a condition for entering the direct communication mode. Here, only a specific example is illustrated. It can be understood that the conditions for entering the direct communication mode can also be set according to the actual situation and the specific service requirements of U E 1 and U E2.

S302. The base station sends the first notification signaling to the UE1 and the UE2, where the first notification signaling carries the direct communication mode indication identifier and the at least one service identifier, so that the UE1 and the UE2 are At least one service enters the direct communication mode.

The incoming direct communication mode indication identifier is used to indicate that the service corresponding to the at least one service identifier between the U E 1 and the U E2 enters the direct communication mode. The service identifier of the direct communication mode may be: a bearer identifier carrying the service, identification information of the service, and an internet protocol (IP) quintuple. The specific form of the service identifier is related to the bearer type that carries the service. For example, for a service with a dedicated bearer, if there is only one type of service on the dedicated bearer, the service identifier carried in the notification signaling may be the bearer identifier, the service flow identifier, or the IP quintuple; Service, because the public bearer may have multiple services, the service identifier carried in the notification signaling can only use the identifier of the service granularity, for example, the service identifier or the IP quintuple.

The notification signaling may carry the security association information, where the security association information is used to encrypt at least one service data entering the direct communication mode, or the UE1 and the UE2, in addition to carrying the direct communication mode indication identifier and the at least one service identifier. Decrypt. This is because the terminal and the base station encrypt the transmitted data using the terminal granularity transmission key when communicating normally. After the terminal enters the direct transmission mode, the data sent by the transmitting terminal is directly transmitted to the receiving terminal for processing. Therefore, the original security mechanism cannot work normally. Therefore, when the terminal enters the direct communication mode, the base station can configure the terminal for security. The alliance information is used to encrypt or decrypt the transmitted data after the terminal enters the direct communication mode.

After obtaining the first notification signaling sent by the base station, the UE1 and the UE2 enter the direct communication mode.

After receiving the first notification signaling sent by the base station, UE1 and UE2 mark the service object corresponding to the service identifier entering the direct communication mode as a direct communication mode or a normal communication mode, and update the security association information.

5304. The UE1 and the UE2 that are in the direct communication mode respectively send a scheduling request to the base station, where the scheduling request carries at least one service identifier.

The scheduling request is used to request the base station to allocate an uplink resource for the service corresponding to the carried service identifier. 5305. The base station determines, according to the service identifier carried in the scheduling request sent by the UE1 and the UE2, whether the service identifier sent by the UE1 and the UE2 is the same. If yes, execute S306.

5306. The base station allocates uplink resources to UE1 and UE2.

As a possible implementation manner, the base station may allocate the same uplink resource to the two terminals according to the service with the largest amount of data transmitted in the service corresponding to the at least one service identifier carried in the scheduling request.

5307. The base station sends the uplink resource allocation indication information to the UE1 and the UE2, where the uplink resource allocation indication information carries the allocated uplink resource information and the at least one service identifier.

The uplink resource allocation indication information may be carried by a Physical Downlink Control Channel (PDCCH) channel, where the service identifier carried in the uplink resource allocation indication information is used to describe a service object targeted by the allocated uplink resource, to avoid UE1 or U E2 sends other service data on the allocated uplink resources.

After receiving the uplink resource allocation indication information sent by the base station, the UE1 and the UE2 send the corresponding service data on the allocated uplink resource according to the service identifier carried in the uplink resource allocation indication information.

S309. The base station receives data sent by UE1 and UE2 on the allocated uplink resource.

The base station allocates the same downlink resource to UE1 and UE2 according to the data received on the allocated uplink resource.

531 1. The base station sends the downlink resource allocation indication information to the UE1 and the UE2, where the downlink resource allocation indication information carries the allocated downlink resource information.

The downlink resource allocation indication information may also be carried through the PDCCH channel.

The base station forwards the data received on the allocated uplink resource to the UE1 and the UE2 on the allocated downlink resource, so that the UE1 and the UE2 acquire the data sent by the peer end.

After receiving the data forwarded by the base station on the allocated downlink resource, the UE1 and the UE2 remove the data sent to the peer end from the received data to obtain the data sent by the peer end. The UE1 and the UE2 decrypt the received data using the foregoing updated security association to obtain the original data sent by the opposite end.

After receiving the data sent by the base station, UE1 or UE2 needs to perform self-signal cancellation to obtain the data sent by the peer. There are various ways to perform self-signal cancellation. For example, UE1 and/or UE2 can perform self-signal cancellation according to chronological order (ie, sequence number of frames), and UE1 and/or UE2 can set (default) to receive the nth frame sent by the base station. In the case of data, the nm frame data sent to the opposite end is used as data to be erased, wherein the specific value of m can be configured at the terminal, or the terminal obtains when entering the direct communication mode, or is provided by the base station to the terminal in the direct communication mode. Alternatively, the base station may further carry the frame number of the data to be eliminated in the downlink resource allocation indication information that is sent to the terminal, and the terminal obtains the data to be eliminated according to the frame number of the to-be-cancelled data, where the frame number identifier may be an absolute frame number, or After receiving the data sent by the base station, the terminal can obtain the data to be eliminated according to the frame number of the data to be eliminated, thereby obtaining the data sent by the peer end. The absolute frame number or the relative frame number corresponding to the frame number identifier is unique in the direct communication between UE1 and UE2. Therefore, UE1 and UE2 can uniquely determine the data to be eliminated according to the frame number of the data to be eliminated.

It should be noted that, when UE1 and /UE2 in the direct communication mode occur in the handover, or enter the idle mode, UE1 and UE2 automatically exit the direct communication mode. In addition, the base station may further determine, according to the change of the channel quality between the UE1 and/or the UE2 and the base station, or the change of the traffic volume, whether the UE1 and the UE2 are required to exit the direct communication mode, and the base station determines whether the UE1 and the UE2 enter the direct communication mode. Similarly, the base station may preset a condition for exiting the direct communication mode. When the condition is met, the base station sends a second notification signaling to the UE1 and the UE2, where the notification signaling carries the exit direct communication mode indication identifier and the at least one service identifier. , indicating that the corresponding services of UE1 and UE2 exit the direct communication mode.

A person skilled in the art can understand that all or part of the process of implementing the above embodiment method can be completed by a computer program to instruct related hardware, and the program can be stored in a computer readable storage medium, the program In execution, the flow of an embodiment of the methods as described above may be included. The storage medium may be a magnetic disk, an optical disk, or a read-only storage memory. (Read-Only Memory, ROM) or random access memory (RAM).

4 is a schematic structural diagram of an embodiment of a base station according to the present invention. As shown in FIG. 4, the base station includes: a receiving unit 11 and a transmitting unit 12;

The receiving unit 11 is configured to receive data sent to the opposite end by two terminals entering the direct communication mode, where the two terminals are located in a service range of the base station;

The sending unit 12 is configured to forward the data received by the receiving unit 11 to the two terminals, so that the two terminals simultaneously acquire data sent by the opposite end.

FIG. 5 is a schematic structural diagram of another embodiment of a base station according to the present invention. As shown in FIG. 5, the base station includes: a receiving unit 11 and a sending unit 12;

The base station may further include: a determining unit 13;

The determining unit 13 is configured to determine whether the two terminals meet the set condition of entering the direct communication mode;

The sending unit 12 is further configured to: if the two terminals meet the condition for entering the direct communication mode, the base station sends first notification signaling to the two terminals, where the first notification signaling is Carrying the direct communication mode indication identifier and the at least one service identifier, so that at least one service between the two terminals enters a direct communication mode.

The receiving unit 11 is further configured to: receive a scheduling request that is sent by the two terminals, where the scheduling request carries at least one service identifier;

Further, the base station may further include: a resource allocation unit 14;

The resource allocation unit 14 is configured to allocate uplink resources to the two terminals if at least one of the scheduling requests sent by the two terminals is the same;

The sending unit 12 is further configured to: send the uplink resource allocation indication information to the two terminals, where the uplink resource allocation indication information carries the allocated uplink resource information and the at least one service identifier.

Further, the receiving unit 11 is specifically configured to: receive the two on the allocated uplink resource The data sent by the terminal.

The resource allocation unit 14 is further configured to: allocate, by the base station, the same downlink resource to the two terminals according to the data received on the allocated uplink resource;

The sending unit 12 is further configured to: send the downlink resource allocation indication information to the two terminals, where the downlink resource allocation indication information carries the allocated downlink resource information.

Further, the sending unit 12 may be specifically configured to: forward the data received on the allocated uplink resource to the two terminals simultaneously on the allocated downlink resource, so that the two terminals acquire the peer end sending The data.

The base station provided by the embodiment of the present invention is a device for performing communication between terminals according to an embodiment of the present invention. The detailed process of the method for performing communication between terminals may be See the method embodiment, and details are not described herein again.

The base station provided by the embodiment of the present invention is located in the service range of the same base station. After entering the direct communication mode, the two terminals send data sent to the opposite end to the base station, and the base station simultaneously forwards the received data to the two terminals. So that the two terminals respectively obtain the data sent by the opposite end. In the embodiment of the present invention, the base station performs processing such as decoding the received data, thereby saving processing resources of the base station and saving wireless air interface resources.

6 is a schematic structural diagram of an embodiment of a terminal provided by the present invention. As shown in FIG. 6, the terminal includes: a sending unit 21, a receiving unit 22, and an obtaining unit 23;

The sending unit 21 is configured to forward the data sent to the opposite end to the base station, so that the base station forwards the received data to the terminal at the same time, where the terminal and the peer end are located in the service range of the base station. Inside;

The receiving unit 22 is configured to receive data forwarded by the base station;

The obtaining unit 23 is configured to obtain data sent by the ten end according to the data received by the receiving unit 22. In another embodiment of the present invention, the receiving unit 22 is further configured to: receive the first notification signaling sent by the base station, where the first notification signaling carries the direct communication mode indication identifier and the at least one service Identifying that at least one service between the terminal and the peer enters directly Communication mode.

The sending unit 21 is further configured to: send a scheduling request to the base station, where the scheduling request carries at least one service identifier;

The receiving unit 22 may be further configured to: receive the uplink resource allocation indication information that is sent by the base station, where the uplink resource allocation indication information carries the allocated uplink resource information and the at least one service identifier.

The sending unit 21 may be specifically configured to: forward data sent to the peer to the base station on the allocated uplink resource.

The receiving unit 22 is further configured to: receive the downlink resource allocation indication information that is sent by the base station, where the downlink resource allocation indication information carries the allocated downlink resource information.

The receiving unit 22 is further configured to: receive the data forwarded by the base station on the allocated downlink resource; the acquiring unit 23 may be specifically configured to: remove data sent to the peer end from the received data, to obtain the peer end sending The data.

The terminal provided by the embodiment of the present invention is a device for performing communication between terminals according to an embodiment of the present invention. The detailed process of the method for performing communication between terminals may be See the method embodiment, and details are not described herein again.

The terminal provided by the embodiment of the present invention is located in the service range of the same base station. After entering the direct communication mode, each terminal sends data sent to the opposite end to the base station, and the base station forwards the received data to the two terminals simultaneously. Each terminal can obtain data sent by the peer end from the received data. In the embodiment of the present invention, the base station performs processing such as decoding on the received data, thereby saving processing resources of the base station and saving wireless air interface resources.

It should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: The technical solutions described in the foregoing embodiments are modified, or some of the technical features are equivalently replaced. The modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

Rights request

A communication method between terminals, characterized in that it comprises:

The method according to claim 1, wherein before the receiving, by the base station, the data sent to the peer end by the two terminals entering the direct communication mode, the method further includes:

Determining, by the base station, whether the two terminals meet the set condition of entering the direct communication mode; if the two terminals satisfy the condition of entering the direct communication mode, the base station separately sends the second terminal to the two terminals And a notification signaling, the first notification signaling carries an incoming direct communication mode indication identifier and at least one service identifier, so that at least one service between the two terminals enters a direct communication mode.

The method according to claim 2, wherein the first notification signaling further carries security association information, where the security association information is used by the two terminals to enter at least one service in a direct communication mode. The data is encrypted or decrypted.

Receiving, by the base station, a scheduling request that is sent by the two terminals, where the scheduling request carries at least one service identifier;

If the at least one service identifier sent by the two terminals is the same, the base station allocates uplink resources to the two terminals, and sends uplink resource allocation indication information to the two terminals, where the uplink is The resource allocation indication information carries the allocated uplink resource information and at least one service identifier.

The method according to claim 4, wherein the base station allocates uplink resources to the two terminals, specifically: And the base station allocates the same uplink resource to the two terminals according to the service with the largest amount of data transmitted in the service corresponding to the at least one service identifier carried in the scheduling request.

The method according to claim 4 or 5, wherein the base station receives data sent to the opposite end by two terminals entering the direct communication mode, specifically:

The base station receives data sent by the two terminals on the allocated uplink resource.

The method according to claim 6, wherein before the base station forwards the received data to the two terminals, the method further includes:

And the base station allocates the same downlink resource to the two terminals according to the data received on the allocated uplink resource, and sends downlink resource allocation indication information to the two terminals, where the downlink resource allocation indication information is The assigned downlink resource information is carried in the middle.

The method according to claim 7, wherein the base station forwards the received data to the two terminals at the same time, specifically:

The base station simultaneously forwards data received on the allocated uplink resource to the two terminals on the allocated downlink resource, so that the two terminals acquire data sent by the opposite end.

The method according to any one of claims 1-3, wherein, after the base station forwards the received data to the two terminals at the same time, the method further includes:

If the two terminals do not meet the conditions for entering the direct communication mode, the base station sends a second notification signaling to the two terminals, where the second notification signaling carries an exit direct communication mode indication identifier. And at least one business identifier.

10. A communication method between terminals, characterized in that it comprises:

The terminal that enters the direct communication mode forwards the data sent to the peer end to the base station, so that the base station forwards the received data to the terminal and the opposite end at the same time, and the terminal and the opposite end are located in the service range of the base station;

The method according to claim 10, wherein before the terminal that enters the direct communication mode forwards the data sent to the peer to the base station, the method further includes: The terminal receives the first notification signaling sent by the base station, where the first notification signaling carries an incoming direct communication mode indication identifier and at least one service identifier, and at least one service between the terminal and the opposite end enters directly Communication mode.

The method according to claim 11, wherein the first notification signaling further carries security association information, where the security association information is used by the terminal to perform at least one service data entering a direct communication mode. Encrypt or decrypt.

The method according to claim 10, wherein before the terminal that enters the direct communication mode forwards the data sent to the peer end to the base station, the method further includes:

The terminal sends a scheduling request to the base station, where the scheduling request carries at least one service identifier;

The terminal receives the uplink resource allocation indication information sent by the base station, where the uplink resource allocation indication information carries the allocated uplink resource information and at least one service identifier.

The method according to claim 13, wherein the terminal that enters the direct communication mode forwards the data sent to the opposite end to the base station, specifically:

The terminal forwards data sent to the peer to the base station on the allocated uplink resource.

The method according to claim 13 or 14, wherein, after the terminal that enters the direct communication mode forwards the data sent to the opposite end to the base station, the method further includes:

The terminal receives the downlink resource allocation indication information sent by the base station, where the downlink resource allocation indication information carries the allocated downlink resource information.

The method according to claim 15, wherein the terminal acquires data sent by the opposite end according to the data forwarded by the base station, which is specifically:

Receiving, by the terminal, the data forwarded by the base station on the allocated downlink resource;

The terminal removes data sent to the peer end from the received data to obtain data sent by the peer end.

17. The method according to claim 16, wherein the terminal receives the number from According to the data sent to the peer, the data sent by the peer is obtained as follows:

When receiving the data of the nth frame sent by the base station, the terminal uses the data of the nm frame that is sent to the peer end as the data to be eliminated; or the terminal obtains the frame number of the data to be eliminated in the downlink resource allocation indication information sent by the base station. Obtaining the to-be-cancelled data according to the frame number of the to-be-cancelled data; the terminal canceling the to-be-cancelled data from the received data, and acquiring data sent by the opposite end.

The method according to any one of claims 10 to 13, further comprising: if the terminal or the peer enters an idle mode, or the terminal or the peer switches, the terminal exits The direct communication mode.

19. A base station, comprising:

The base station according to claim 19, further comprising:

a determining unit, configured to determine whether the two terminals meet the set condition of entering the direct communication mode;

The sending unit is further configured to: if the two terminals meet the condition for entering the direct communication mode, the base station sends first notification signaling to the two terminals, where the first notification signaling is Carrying the direct communication mode indication identifier and the at least one service identifier, so that at least one service between the two terminals enters a direct communication mode.

The base station according to claim 19, wherein the receiving unit is further configured to: receive a scheduling request that is sent by the two terminals, where the scheduling request carries at least one service identifier;

a resource allocation unit, configured to allocate an uplink resource to the two terminals if at least one service identifier of the scheduling request sent by the two terminals is the same;

The sending unit is further configured to: send uplink resource allocation indication information to the two terminals, respectively. The uplink resource allocation indication information carries the allocated uplink resource information and the at least one service identifier.

The base station according to claim 21, wherein the receiving unit is configured to: receive data sent by the two terminals on the allocated uplink resource.

The base station according to claim 22, wherein the resource allocation unit is further configured to: the base station allocates the same downlink to the two terminals according to data received on the allocated uplink resource Resource

The sending unit is further configured to: send downlink resource allocation indication information to the two terminals, where the downlink resource allocation indication information carries the allocated downlink resource information.

The base station according to claim 23, wherein the sending unit is configured to: forward, on the allocated downlink resource, data received on the allocated uplink resource to the two terminals simultaneously So that the two terminals acquire data sent by the opposite end.

25. A terminal, comprising:

a receiving unit, configured to receive data forwarded by the base station;

And an acquiring unit, configured to acquire data sent by the opposite end according to the data received by the receiving unit.

The terminal according to claim 25, wherein the receiving unit is further configured to: receive a first notification signaling sent by the base station, where the first notification signaling carries an incoming direct communication mode indication identifier And at least one service identifier, where the at least one service between the terminal and the peer enters a direct communication mode.

The terminal according to claim 25, wherein the sending unit is further configured to: send a scheduling request to the base station, where the scheduling request carries at least one service identifier;

The receiving unit is further configured to: receive uplink resource allocation indication information that is sent by the base station, where the uplink resource allocation indication information carries the allocated uplink resource information and at least one service label Knowledge.

The terminal according to claim 27, wherein the sending unit is specifically used

The terminal according to claim 27 or 28, wherein the receiving unit is further configured to: receive downlink resource allocation indication information sent by the base station, where the downlink resource allocation indication information carries the allocated downlink resource information.

The terminal according to claim 29, wherein the receiving unit is further configured to: receive data forwarded by the base station on the allocated downlink resource;

The acquiring unit is specifically configured to: remove data sent to the peer end from the received data, to obtain data sent by the peer end.