WO2015066844A1 - Method and apparatus for transmitting and obtaining information, application server, base station, and terminal - Google Patents

Abstract

The present application relates to the technical field of communications, discloses a method and an apparatus for transmitting and obtaining information, an application server, a base station and a terminal, so as to solve the technical problem in the prior art that when group communications data is transmitted by using an MBMS mode, the time delay that a new joining terminal obtains the group communications data is long. The method for transmitting information specifically comprises: an application server of a group communications service receiving a request message that is sent by a terminal and requesting joining a group; and the application server of the group communications service sending, according to the request message, multicast control information to the terminal through a serving node of the application server or the terminal, or the application server of the group communications service sending, to the terminal, instruction information comprising identification information of an MBMS bearer, the instruction information being used for instructing the terminal to obtain multicast control information corresponding to the identification information, and the multicast control information being used for making the terminal obtain group communications data.

Description

 Method, device, application server, base station and terminal for transmitting and acquiring information

 The present application relates to the field of mobile communications technologies, and in particular, to a method, an apparatus, an application server, a base station, and a terminal for transmitting and acquiring information. Background technique

 In order to achieve more efficient communication, 3GPP (The 3rd Generation Partnership Project)-led LTE (Long Term Evolution) hopes to introduce a networking communication mechanism, which refers to the organization of multiple terminals. In a group, these terminals can be distributed in the same cell, or in different cells, or even different communication systems. Into the wireless communication network, these group members can quickly and easily share information. Please refer to Figure 1 for a system structure diagram of a set of communication mechanisms:

 The system includes seven terminals A, B, C, D, E, F, and G. The seven terminals are distributed in two cells. If it is assumed that terminal C has data sharing, terminal C first transmits the data packet to The self-described base station (ie, base station 1), the base station 10 transmits the data packet to other terminals in its group, namely: terminals A, B, D, E; and the base station 1 transmits the data packet to the base station 2 Then, the data packet is sent to the corresponding terminal, that is, the terminal, through the base station 11. G, but when the data packet is transmitted from the base station 1 to the base station 2, some other network elements may need to be forwarded, so it takes a certain time. However, the current 3GPP requires that data is sent from the user C to other users. Data, the delay can not be greater than 300ms.

In the current LTE system, MBMS (Multimedia Broadcast Multicast Service) is used to transmit data. Compared with the ordinary communication method, MBMS is characterized by using a common resource to send data packets, and all receivers in the small area receive data through the same resources, so that wireless resources can be utilized more efficiently. In the case of transmitting data by MBMS, it is necessary to first inform the terminal of the channel configuration and other information by using the MCCH channel, which is called "multicast control." Information", in order to allow terminals that subsequently join the MBMS transmission to receive data correctly, the multicast control information is periodically transmitted on the radio interface, as shown in Figure 1.

 In the current protocol, there are four values for the transmission period of the MCCH, which are {320ms, 640ms, 1280ms, 2560ms}. It can be seen that if the data of the group communication is transmitted by the MBMS method, even if the shortest MCCH repetition period is used, it is required. 320 ms, which results in a long delay in obtaining group communication data, and cannot meet the delay requirement of group communication. Summary of the invention

 The embodiment of the present invention provides a method for transmitting data, a method for receiving data, and a device, to solve the technical problem that a delay time for newly joining a terminal to acquire group communication data when a group communication data is transmitted by using an MBMS method in the prior art is solved.

 In a first aspect, the embodiment of the present application provides a method for transmitting a message, including: receiving, by an application server of a group communication service, a request message that is sent by a terminal to request a group; the application server of the group communication service passes the request message according to the request message Sending the multicast control information to the terminal by itself or through the service node device of the terminal, or the application server of the group communication service sends the indication information including the identifier information indicating the MBMS bearer of the multimedia broadcast multicast service to the terminal, where The indication information is used to indicate that the terminal acquires the multicast control information corresponding to the identifier information, and the multicast control information is used to enable the terminal to acquire group communication data.

 With reference to the first aspect, in a first possible implementation, the multicast control information is specifically: MBMS bearer information of the terminal joining a group.

 With reference to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner, before the sending the multicast control information to the terminal by itself, the method further includes: The application server of the group communication service sends a request message to the service mobility management entity of the terminal, where the request message is used to request a request message for acquiring the multicast control information; and the application server of the group communication service receives the terminal The serving mobility management entity indicates the multicast control information acquired and returned by the serving base station or the multi-cell coordination entity of the terminal.

In combination with the first aspect or the first possible implementation of the first aspect, in a third possible implementation In the present mode, the serving node device that sends the multicast control information to the terminal by the serving node device of the terminal specifically includes: the application server of the group communication service sends an indication message to the serving mobility management entity of the terminal, where The indication message is used to indicate that the serving mobility management entity of the terminal triggers the serving base station of the terminal to send the multicast control information to the terminal.

 With reference to the first aspect or the first possible implementation manner of the first aspect, in a fourth possible implementation manner, the application server of the group communication service sends, to the terminal, indication information that includes the identifier information indicating the MBMS bearer, Before the indication information is used to indicate that the terminal acquires the multicast control information corresponding to the identifier information, the method further includes: sending, by the application server of the group communication service, a serving mobility management entity of the terminal a request message, the request message is used to request to obtain a multimedia multicast area identifier of a cell where the terminal is located; and the application server of the group communication service receives the service mobility management entity to obtain from a multi-cell coordination entity of the terminal, and Returning the multimedia multicast area identifier; the application server of the group communication service sends the indication information including the identifier information indicating the MBMS bearer to the terminal, where the indication information is used to instruct the terminal to acquire the identifier information corresponding to the identifier information. The multicast control information is specifically: an application of the group communication service The server sends the indication information including the identifier of the multimedia multicast area to the terminal, where the indication information is used to enable the terminal to obtain the multicast control information corresponding to the multimedia multicast area identifier from the serving base station.

With reference to the first aspect, in a fifth possible implementation, the application server of the group communication service sends the multicast control information to the terminal by itself or by the serving node device of the terminal according to the request message. Or the application server of the group communication service sends, to the terminal, indication information that includes the identifier information indicating the MBMS bearer, where the indication information is used to indicate that the terminal acquires the multicast control information corresponding to the identifier information. The method further includes: determining, by the application server of the group communication service, the terminal identifier of the terminal by using the request message; the application server of the group communication service according to the request message, by itself or through the terminal The service node device sends the multicast control information to the terminal, or the application server of the group communication service sends the indication information including the identifier information indicating the MBMS bearer to the terminal, where the indication information is used to indicate that the terminal acquires The multicast control information corresponding to the identifier information is specifically: The application server of the group communication service sends multicast control information to the terminal by itself or through the service node device of the terminal according to the terminal identifier, or the application server of the group communication service sends an indication to the terminal. The indication information of the identifier information carried by the MBMS, the indication information is used to instruct the terminal to acquire the multicast control information corresponding to the identifier information.

 With reference to the first aspect, in a sixth possible implementation, the application server of the group communication service sends, to the terminal, indication information that includes the identifier information indicating the MBMS bearer, where the indication information is used to indicate that the terminal acquires Before the multicast control information corresponding to the identifier information, the method further includes: determining, by the application server of the group communication service, the temporary mobile group identifier or the multimedia broadcast multicast session of the terminal from the request message The application server of the group communication service sends the indication information including the identifier information indicating the MBMS bearer to the terminal, where the indication information is used to instruct the terminal to acquire the multicast control information corresponding to the identifier information, specifically The application server of the group communication service sends the request information including the temporary mobile group identifier or the multimedia broadcast multicast session identifier to the terminal, where the indication information is used to indicate that the terminal is to the terminal The serving base station requests to acquire more than the temporary mobile group identity code or the multimedia broadcast The multicast session identifier corresponding to the control information.

 In a second aspect, the embodiment of the present application provides a method for transmitting a message, including: receiving, by a base station, a control message; the base station sending, according to the control message, multicast control information to the terminal or sending an application to an application server of a group communication service The multicast control information is used by the application server of the group communication service to forward the multicast control information to the terminal, and the multicast control information is used to enable the terminal to acquire group communication data.

 With reference to the second aspect, in a first possible implementation manner, the multicast control information is specifically: the MBMS bearer information of the multimedia broadcast multicast service that the terminal joins the group.

 With reference to the second aspect, or the first possible implementation manner of the second aspect, in a second possible implementation manner, the receiving, by the base station, a control message, where: the base station receives an indication that is sent by the terminal An identifier information request message carried by the MBMS, where the clear request message is used to request to acquire the multicast control information corresponding to the identifier information.

In conjunction with the second possible implementation of the second aspect, in a third possible implementation, The identifier information is specifically: a multimedia multicast area identifier of the cell where the terminal is located, or a temporary mobile group identifier of the terminal or a multimedia broadcast multicast session identifier of the cell where the terminal is located; the base station is based on the control message. And sending the multicast control information to the terminal, where: the base station sends, to the terminal, a group corresponding to the multimedia multicast area identifier or the temporary mobile group identifier or the multimedia broadcast multicast session identifier. Broadcast control information.

 With reference to the second aspect, or the first possible implementation manner of the second aspect, in a fourth possible implementation manner, the receiving, by the base station, the control message, is: the base station receiving the service mobility management entity by the terminal And the indication information sent by the application server of the group communication service to the service mobility management entity, and used to instruct the base station to send the multicast control information to the terminal; or the base station receives the control The message is specifically: the base station receives the indication information sent by the serving mobility management entity of the terminal, where the indication information is sent by the application server of the group communication service to the serving mobility management entity, and is used to indicate the base station Sending the multicast control information to an application server of the group communication service.

 In a third aspect, the embodiment of the present application provides a method for acquiring a message, including: the terminal sending a request message for clearing an incoming group to an application server of the group communication service; the terminal receiving multicast control information, the multicast control information The application server of the group communication service sends the instruction to the terminal by itself or the service node device of the terminal according to the request message; or the application server that receives the group communication service sends the indication multimedia broadcast And the indication information of the identifier information carried by the multicast service MBMS, and the multicast control information corresponding to the identifier information is obtained according to the indication information; the multicast control information is used to enable the terminal to acquire group communication data.

 With reference to the third aspect, in the first possible implementation, the multicast control information is: MBMS bearer information of the terminal joining the group.

With reference to the third aspect, or the first possible implementation manner of the third aspect, in a second possible implementation manner, the terminal receives multicast control information, where the multicast control information is applied by the group communication service The server sends the multicast control message sent by the application server of the group communication service to the terminal according to the clearing message, where the terminal receives the multicast control message sent by the application server of the group communication service, where the multicast control message passes the The application server of the group communication service moves by the service to the terminal Obtaining, by the management entity, an indication message, used by the serving mobility management entity to send to the multi-cell coordination entity of the serving base station or terminal, and instructing the serving base station or the multi-cell coordination entity to The application server of the group communication service sends the multicast control information.

 With reference to the third aspect, or the first possible implementation manner of the third aspect, in a third possible implementation manner, the terminal receives multicast control information, where the multicast control information is applied by the group communication service The server sends the multicast control information sent by the serving base station of the terminal to the terminal according to the request message, which is sent by the serving node device of the terminal, where the terminal receives the multicast control information sent by the serving base station of the terminal, and the multicast control information Obtaining, by the application server of the group communication service, sending an indication message to the serving mobility management entity of the terminal, where the indication message is sent by the serving mobility management entity to the serving base station and instructing the serving base station to The terminal sends the multicast control information.

 With reference to the third aspect, or the first possible implementation manner of the third aspect, in a fourth possible implementation manner, the terminal receiving, by the application server of the group communication service, an indication that includes identifier information indicating an MBMS bearer And the obtaining, by the terminal, the multimedia multicast area identifier of the cell where the terminal is located, where the terminal receives the multicast control information corresponding to the identifier information, according to the indication information, where The multimedia multicast area identifier is obtained by the application server of the group communication service sending an indication message to the service mobility management entity of the terminal, where the indication message is used to indicate that the service mobility management entity is from the terminal. The cell coordination entity acquires the multimedia multicast area identifier and returns the multimedia multicast area identifier to an application server of the group communication service; the terminal sends the multimedia multicast area identifier to a serving base station of the terminal Receiving, by the terminal, the serving base station according to the multimedia multicast area And returning the acquired knowledge of the multicast control information.

With reference to the third aspect, or the first possible implementation manner of the third aspect, in a fifth possible implementation manner, the terminal receiving, by the application server of the group communication service, an indication that includes identifier information indicating an MBMS bearer Obtaining, according to the indication information, the multicast control information corresponding to the identifier information, specifically: the terminal receiving, by the application server of the group communication service, a temporary mobility group identifier or a multimedia broadcast of the terminal Multicast session identifier, said Pro The time-shifting group identification code or the multimedia broadcast multicast session identifier is obtained by the application server of the group communication service from the requesting group request message sent by the terminal; the terminal requests the acquisition base station from the serving base station of the terminal The multicast control information corresponding to the temporary mobile group identifier or the multimedia broadcast multicast session identifier;

 The terminal receives multicast control information corresponding to the temporary mobility group identification code or the multimedia broadcast multicast session identifier sent by the serving base station of the terminal.

 In a fourth aspect, the embodiment of the present application provides an apparatus for transmitting a message, including: a receiving module, configured to receive a request message for requesting a group, and a sending module, connected to the receiving module, for receiving After receiving the request message, the module sends multicast control information to the terminal by itself or through the serving node device of the terminal according to the request message, or sends an MBMS bearer indicating the multimedia broadcast multicast service to the terminal. And the indication information is used to indicate that the terminal acquires the multicast control information corresponding to the identifier information; and the multicast control information is used to enable the terminal to acquire group communication data.

 With reference to the fourth aspect, in a first possible implementation manner, the multicast control information is specifically: the MBMS bearer information that the terminal joins the group.

 With reference to the fourth aspect, or the first possible implementation manner of the fourth aspect, in a second possible implementation, the sending module is specifically configured to: send a request message to a service mobility management entity of the terminal, where The request message is used to request the request message for acquiring the multicast control information; the receiving module is further configured to: after the sending module sends the request message, receive a service mobility management entity of the terminal to indicate the The multicast control information obtained and returned by the serving base station or the multi-cell coordination entity of the terminal; the sending module is further configured to: send the multicast control information to the terminal.

 With reference to the fourth aspect, or the first possible implementation manner of the fourth aspect, in a third possible implementation, the sending module is specifically configured to: send an indication message to a serving mobility management entity of the terminal, where The indication message is used to indicate that the serving mobility management entity of the terminal triggers the serving base station of the terminal to send the multicast control information to the terminal.

In combination with the fourth aspect or the first possible implementation of the fourth aspect, in the fourth possible implementation In the present mode, the sending module is further configured to: send a request message to the serving mobility management entity of the terminal, where the request message is used to request to acquire a multimedia multicast area identifier of a cell where the terminal is located; The module is further configured to: after the receiving module sends the request message, receive the multimedia multicast area identifier that is obtained and returned by the serving mobility management entity from the multi-cell coordination entity of the terminal; And the method is further configured to: send, to the terminal, indication information that includes a multimedia multicast area identifier, where the indication information is used to enable the terminal to obtain, by the serving base station, the group corresponding to the multimedia multicast area identifier. Broadcast control information.

 With reference to the fourth aspect, in a fifth possible implementation, the method further includes: a determining module, configured to be connected to the sending module, configured to determine, by using the request message, a terminal identifier of the terminal; After the determining module determines the terminal identifier, according to the terminal identifier, sending multicast control information to the terminal by itself or through a serving node device of the terminal, or sending an indication including the indication to the terminal to the terminal The indication information of the carried identifier information, where the indication information is used to instruct the terminal to acquire the multicast control information corresponding to the identifier information.

 With reference to the fourth aspect, in a sixth possible implementation, the method further includes: a determining module, configured to be connected to the sending module, configured to determine, from the request message, a temporary mobile group identifier or a multimedia broadcast of the terminal The sending module is further configured to: after the determining module determines the temporary mobile group identifier or the multimedia broadcast multicast session identifier, send the temporary mobile group identifier or the terminal to the terminal The request information of the multimedia broadcast multicast session identifier, the indication information is used to indicate that the terminal requests the serving base station of the terminal to acquire the temporary mobile group identifier or the multimedia broadcast multicast session identifier. The multicast control information.

 In a fifth aspect, the embodiment of the present application provides a message transmission apparatus, including: a receiving module, configured to receive a control message; a sending module, connected to the receiving module, after the receiving module receives the control message, Transmitting, according to the control message, multicast control information to the terminal or sending the multicast control information to an application server of the group communication service, where the application server of the group communication service is configured to forward the multicast control information to The terminal, the multicast control information is used to enable the terminal to acquire group communication data.

With reference to the fifth aspect, in the first possible implementation manner, the multicast control information is specifically: The terminal joins the group of multimedia broadcast multicast service MBMS bearer information.

 With reference to the fifth aspect, or the first possible implementation manner of the fifth aspect, in a second possible implementation, the receiving module is specifically configured to: receive, by the terminal, an identifier that includes an indication of an MBMS bearer An information request message, where the request message is used to request to acquire the multicast control information corresponding to the identifier information.

 With reference to the second possible implementation manner of the fifth aspect, in a third possible implementation manner, the identifier information is specifically: a multimedia multicast area identifier of a cell where the terminal is located, or a temporary mobile group identifier of the terminal The code or the multimedia broadcast multicast session identifier of the cell where the terminal is located; the sending module is specifically configured to: send, to the terminal, the multimedia multicast area identifier or the temporary mobile group identifier or the multimedia broadcast Multicast control information corresponding to the multicast session identifier.

 With reference to the fifth aspect, or the first possible implementation manner of the fifth aspect, in a fourth possible implementation, the receiving module is specifically configured to: receive the indication information sent by the serving mobility management entity of the terminal The indication information is sent by the application server of the group communication service to the service mobility management entity, and is used to instruct the sending module to send the multicast control information to the terminal; or the receiving module is specifically used to Receiving indication information sent by the service mobility management entity of the terminal, the indication information being sent by the application server of the group communication service to the service mobility management entity, and configured to instruct the sending module to serve the group communication The application server sends the multicast control information.

 In a sixth aspect, the embodiment of the present application provides an apparatus for acquiring a message, including: a sending module, configured to send a request message for requesting an inbound group to an application server of a group communication service; and a receiving module connected to the sending module, configured to After the sending module sends the request message, receiving multicast control information, where the multicast control information is sent by the application server of the group communication service to the service node device of the terminal or the terminal according to the request message to Or the terminal receives the indication information that is sent by the application server of the group communication service and includes the identifier information indicating the MBMS bearer, and acquires the multicast control information corresponding to the identifier information according to the indication information. The multicast control information is used to enable the terminal to acquire group communication data.

With reference to the sixth aspect, in a first possible implementation, the multicast control information The method is as follows: the terminal joins the MBMS bearer information of the multimedia broadcast multicast service of the group.

 With reference to the sixth aspect, or the first possible implementation manner of the sixth aspect, in a second possible implementation, the receiving module is specifically configured to: receive, by the application server of the group communication service, a multicast control message, the multicast control message being obtained by an application server of the group communication service by sending an indication message to a serving mobility management entity of the terminal, where the indication message is used by the service mobility management entity Sending to the multi-cell coordination entity of the serving base station or terminal and instructing the serving base station or the multi-cell coordination entity to send the multicast control information to an application server of the group communication service.

 With reference to the sixth aspect, or the first possible implementation manner of the sixth aspect, in a third possible implementation, the receiving module is specifically configured to: receive the group sent by the serving base station of the terminal Broadcast control information, the multicast control information is obtained by an application server of the group communication service sending an indication message to a service mobility management entity of the terminal, where the indication message is used by the service mobility management entity to send Determining the serving base station and instructing the serving base station to send the multicast control information to the terminal.

 With reference to the sixth aspect, or the first possible implementation manner of the sixth aspect, in a fourth possible implementation, the receiving module is further configured to: receive, by the application server of the group communication service, the terminal a multimedia multicast area identifier of the cell, where the multimedia multicast area identifier is obtained by the application server of the group communication service sending an indication message to the service mobility management entity of the terminal, where the indication message is used to indicate the service movement The management entity obtains the multimedia multicast area identifier from the multi-cell coordination entity of the terminal, and returns the multimedia multicast area identifier to the application server of the group communication service; the sending module is further configured to: After receiving the multimedia multicast area identifier, the receiving module sends the multimedia multicast area identifier to the serving base station of the terminal; the receiving module is further configured to: send the multimedia multicast in the sending module After the area identifier is received, the serving base station receives and returns according to the multimedia multicast area identifier. Said multicast control information.

With reference to the sixth aspect, or the first possible implementation manner of the sixth aspect, in a fifth possible implementation, the receiving module is further configured to: receive, by using an application server of the group communication service a temporary mobile group identifier or a multimedia broadcast multicast session identifier of the terminal, the temporary mobile group identification code or the multimedia broadcast multicast session identifier being requested by the application server of the group communication service to request the group from the terminal The sending module is further configured to: after receiving, by the receiving module, the temporary mobile group identifier or the multimedia broadcast multicast session identifier, requesting, by the serving base station of the terminal, the temporary mobile group The multicast control information corresponding to the identifier or the multimedia broadcast multicast session identifier; the receiving module is further configured to: after the sending module sends the temporary mobile group identifier or the multimedia broadcast multicast session identifier, receive the The multicast control information corresponding to the temporary mobile group identifier or the multimedia broadcast multicast session identifier sent by the serving base station of the terminal.

 In a seventh aspect, the embodiment of the present application provides an application server of a group communication service, including: a data transmission interface, configured to receive a request message for requesting a group, and a processor, connected to the data transmission interface, for Sending, according to the request message, the multicast control information to the terminal by using the data transmission interface or the serving node device of the terminal, or sending an indication to the terminal that includes the identifier information indicating the MBMS bearer of the multimedia broadcast multicast service The information indicating that the terminal acquires the multicast control information corresponding to the identifier information; the multicast control information is used to enable the terminal to acquire group communication data.

 With reference to the seventh aspect, in a first possible implementation manner, the multicast control information is specifically: the MBMS bearer information that the terminal joins the group.

 With reference to the seventh aspect, or the first possible implementation manner of the seventh aspect, in a second possible implementation, the processor is further configured to: service mobility management to the terminal by using the data transmission interface The entity sends a request message, where the request message is used to request a request message for acquiring the multicast control information, and receives, by using the data transmission interface, a serving mobility management entity of the terminal, indicating a serving base station or multi-cell coordination of the terminal. The multicast control information obtained and returned by the entity;

With reference to the seventh aspect, or the first possible implementation manner of the seventh aspect, in a third possible implementation, the processor, by using a serving node device of the terminal, sends multicast control information to the terminal, Specifically, the method includes: the processor serving the terminal by using the data transmission interface The mobility management entity sends an indication message, where the indication message is used to indicate that the serving mobility management entity of the terminal triggers the serving base station of the terminal to send the multicast control information to the terminal.

 With reference to the seventh aspect, or the first possible implementation manner of the seventh aspect, in a fourth possible implementation, the processor is further configured to: service mobility management to the terminal by using the data transmission interface The entity sends a request message, where the request message is used to obtain the multimedia multicast area identifier of the cell where the terminal is located, and receives, by using the data transmission interface, the service mobility management entity to obtain the multi-cell coordination entity of the terminal. And returning the multimedia multicast area identifier; the processor, sending, to the terminal, indication information that includes the identifier information indicating the MBMS bearer, where the indication information is used to instruct the terminal to acquire the identifier corresponding to the identifier information. The multicast control information is specifically: the processor sends the multimedia multicast area identifier to the terminal by using the data transmission interface, where the multimedia multicast area identifier is used to request the terminal to obtain the information from the serving base station. The multicast control information.

 With reference to the seventh aspect, in a fifth possible implementation, the processor is further configured to: determine, by the processor, the terminal identifier of the terminal by using the request message; The request message is sent to the terminal by the data transmission interface or by the serving node device of the terminal, or the application server of the group communication service sends the identifier information indicating the MBMS bearer to the terminal. Instructing information, the indication information is used to indicate that the terminal acquires the multicast control information corresponding to the identifier information, specifically: the processor, according to the terminal identifier, according to the request message, by using the The data transmission interface or the service node device of the terminal sends the multicast control information to the terminal, or the application server of the group communication service sends the indication information including the identifier information indicating the MBMS bearer to the terminal, where the indication information is And configured to instruct the terminal to acquire the multicast control information corresponding to the identifier information.

With reference to the seventh aspect, in a sixth possible implementation, the processor is further configured to: determine, by the processor, the temporary mobile group identifier or the multimedia broadcast multicast session of the terminal from the request message The identifier is sent to the terminal, and the indication information is sent to the terminal, where the indication information is used to indicate that the terminal acquires the multicast control information corresponding to the identifier information, specifically: The processor moves the temporary movement through the data transmission interface Sending, to the terminal, the group identification code or the multimedia broadcast multicast session identifier, where the temporary mobile group identification code or the multimedia broadcast multicast session identifier is used by the terminal to request the serving base station of the terminal to obtain the Multicast control information.

 In an eighth aspect, the embodiment of the present application provides a base station, including: a data transmission interface, configured to receive a control message; a processor, connected to the data transmission interface, configured to receive the control information on the data transmission interface Then, based on the control message, sending multicast control information to the terminal or sending the multicast control information to an application server of the group communication service, where the application server of the group communication service is configured to use the multicast control information Forwarding to the terminal, the multicast control information is used to enable the terminal to acquire group communication data.

 With reference to the eighth aspect, in the first possible implementation manner, the multicast control information is specifically: the MBMS bearer information of the multimedia broadcast multicast service that the terminal joins the group.

 With reference to the eighth aspect, or the first possible implementation manner of the eighth aspect, in a second possible implementation, the data transmission interface is specifically configured to: receive, by the terminal, an indication that includes an MBMS bearer And an identifier information request message, where the request message is used to request to acquire the multicast control information corresponding to the identifier information.

 With reference to the second possible implementation manner of the eighth aspect, in a third possible implementation manner, the identifier information is specifically: a multimedia multicast area identifier of a cell where the terminal is located, or a temporary mobile group identifier of the terminal The code or the multimedia broadcast multicast session identifier of the cell where the terminal is located; the processor sends the multicast control information to the terminal by using the data transmission interface, based on the control message, specifically: Transmitting, by the data transmission interface, the multicast control information corresponding to the multimedia multicast area identifier or the temporary mobile group identifier or the multimedia broadcast multicast session identifier to the terminal.

With reference to the eighth aspect, or the first possible implementation manner of the eighth aspect, in a fourth possible implementation, the data transmission interface is specifically configured to: receive an indication sent by a service mobility management entity of the terminal Information, the indication information is sent by the application server of the group communication service to the service mobility management entity, and is used to instruct the data transmission interface to send the multicast control information to the terminal; or the data transmission interface, Specifically for: receiving a service shift by the terminal And the indication information sent by the management entity, where the indication information is sent by the application server of the group communication service to the service mobility management entity, and is used to instruct the data transmission interface to send the group to an application server of the group communication service Broadcast control information.

 In a sixth aspect, the embodiment of the present application provides a terminal, including: a processor and a data transmission interface, where the processor is configured to serve the group communication by using the data transmission interface after determining the request information for requesting the grouping The application server sends a request message for requesting the grouping; the data transmission interface is configured to: receive, by the application server that receives the group communication service, the indication information that is used to indicate the identifier information of the MBMS bearer of the multimedia broadcast multicast service, according to the request message; The processor is further configured to: obtain, according to the indication information, the multicast control information corresponding to the identifier information from a serving base station of the terminal by using the data transmission interface, where the multicast control information is used And causing the terminal to acquire group communication data; the data transmission interface is further configured to: receive multicast control information.

 With reference to the ninth aspect, in the first possible implementation, the multicast control information is: the MBMS bearer information that the terminal joins the group.

 With reference to the ninth aspect, or the first possible implementation manner of the ninth aspect, in a second possible implementation manner, the data transmission interface receives, by the application server that receives the group communication service, the indication that the MBMS bearer is returned according to the request message The indication information of the identifier information is specifically: the data transmission interface receives, from an application server of the group communication service, a multimedia multicast area identifier of a cell where the terminal is located, where the multimedia multicast area identifier is used by the group communication service And the application server sends an indication message to the service mobility management entity of the terminal, where the indication message is used to instruct the service mobility management entity to acquire the multimedia multicast area identifier from the multi-cell coordination entity of the terminal and The multimedia multicast area identifier is returned to the application server of the group communication service; the processor acquires, according to the indication information, a location corresponding to the identifier information from a serving base station of the terminal by using the data transmission interface The multicast control information is specifically: the processor passes the The data transmission interface requests the serving base station of the terminal to acquire multicast control information corresponding to the multimedia multicast area identifier.

With reference to the ninth aspect, or the first possible implementation manner of the ninth aspect, in a third possible implementation manner, the data transmission interface receives an application server of the group communication service according to the request The information returned by the information indicating the identifier information indicating the MBMS bearer is specifically: the data transmission interface receives the temporary mobile group identifier or the multimedia broadcast multicast session identifier of the terminal from the application server of the group communication service. The temporary mobile group identification code or the multimedia broadcast multicast session identifier is obtained by the application server of the group communication service from the request message for requesting the group sent by the terminal; the processor is based on the indication information, by the The data transmission interface obtains the multicast control information corresponding to the identifier information from the serving base station of the terminal, where specifically: the processor requests, by using the data transmission interface, the serving base station of the terminal to obtain the The multicast control information corresponding to the temporary mobile group identifier or the multimedia broadcast multicast session identifier.

 The beneficial effects of the application are as follows:

 In the embodiment of the present application, after receiving the request message for requesting the group sent by the terminal, the application server of the group communication service sends the multicast control information to the terminal itself or through the service node device of the terminal, or the group communication service The application server instructs the terminal to obtain the multicast control information, that is, after the terminal is added to the group, the multicast control information can be directly obtained, and the group communication data can be directly obtained through the multicast control information without waiting for the periodicity of the multicast control information. After the transmission, the group communication data is acquired, so that the technical effect of reducing the delay of the data transmission is achieved. DRAWINGS

 1 is a system construction diagram of a group communication mechanism in the prior art;

 2 is a flowchart of a method for transmitting information based on a GCSE AS in an embodiment of the present application; FIG. 3 is a flowchart of establishing an MBMS bearer and transmitting data through an MBMS bearer in a method for transmitting information according to an embodiment of the present application;

 4 is a flow chart of the GCSE AS acquiring multicast control information in the method for transmitting information according to an embodiment of the present application;

 FIG. 5 is a flowchart of obtaining an MBSFN area ID by a GCSE AS in a method for transmitting information according to an embodiment of the present application;

 6 is a flowchart of a method for transmitting information based on e B in an embodiment of the present application;

FIG. 7 is a flowchart of a method for obtaining information in an embodiment of the present application; FIG. 8 is a flowchart of acquiring, by the UE, multicast control information corresponding to the identifier information according to the indication information in the method for obtaining information according to the embodiment of the present disclosure;

 FIG. 9 is an interaction diagram of multiple devices when an eNB directly sends multicast control information to a UE according to Embodiment 1 of the present application;

 10 is an interaction diagram of multiple devices when an eNB forwards multicast control information to a UE through a GCSE AS according to Embodiment 2 of the present application;

 11 is a flowchart of interaction between multiple devices when a UE requests acquisition of multicast control information from an eNB according to Embodiment 3 of the present application;

 12 is a flow chart of multiple devices interacting when a UE sends a group name to a GCSE AS to join a group, and then obtains multicast control information;

 13 is a first structural diagram of an apparatus for transmitting information in an embodiment of the present application;

 FIG. 14 is a second structural diagram of an apparatus for transmitting information according to an embodiment of the present application;

 15 is a structural diagram of an apparatus for acquiring information in an embodiment of the present application;

 Figure 16 is a structural diagram of a GCSE AS in the embodiment of the present application;

 17 is a structural diagram of an eNB in an embodiment of the present application;

 FIG. 18 is a structural diagram of a UE in an embodiment of the present application. detailed description

In order to solve the technical problem of the method for transmitting information when the new terminal is added to the group to obtain the group communication data when the MBMS mode is used to transmit the group communication data in the prior art, the method of the present application provides a method for transmitting information, which specifically includes: The application server of the group communication service receives the request message for requesting the group sent by the terminal; the application server of the group communication service sends the multicast control information to the terminal by itself or through the service node device of the terminal according to the request message, or the group communication service The application server instructs the terminal to obtain multicast control information. That is to say, after the terminal is grouped, the multicast control information can be directly obtained, and the group communication data can be directly obtained through the multicast control information, and the group communication data is acquired without waiting for the multicast control information to be periodically sent. The technical effect of reducing the delay of data transmission is achieved. The technical solutions in the embodiments of the present application are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present application. It is a partial embodiment of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present application without departing from the inventive scope are the scope of the present application.

 In a first aspect, the embodiment of the present application provides a method for transmitting information, which is applied to a GCSE AS (Group Communication Service Enabler application server). Referring to FIG. 2, the method specifically includes the following. Steps:

 Step S201: The GCSE AS receives a request message for requesting grouping sent by a UE (User Equipment: terminal);

 Step S202: The GCSE AS sends the multicast control information to the UE by itself or through the serving node device of the UE according to the request message, or the GCSE AS sends the indication information including the identifier information indicating the MBMS bearer to the UE, where the indication information is used to indicate the UE. Obtaining multicast control information corresponding to the identifier information; the multicast control information is used to enable the UE to acquire group communication data.

 Before the steps S201 and S202, the MBMS bearer may be established and the data is transmitted through the established MBMS bearer. As shown in FIG. 3, the flow chart for establishing the MBMS bearer and performing data transmission includes the following steps:

 Step S301: The GCSE AS requests the MBMS server BMSC (Broadcast Multicast Service Centre) to establish an MBMS bearer.

 Step S302: The BMSC triggers an MBMS bearer setup procedure, and then establishes an MBMS bearer between the BMSC, the SGW (Serving Gateway), the MME (Mobility Management Entity), and the eNB (E-UTRAN NodeB: Base Station);

 Step S303: After receiving the MBMS bearer setup message, the eNB starts to periodically send multicast control information on the radio interface, and if the UE is located in the group communication system, it can directly receive the multicast control information sent by the eNB.

Step S304: The group communication data arrives at the GCSE AS, and is transmitted to the UE through the MBMS. During the transmission of the above group communication data, if the UE transmits the multicast by the eNB in a broadcast manner Before the control information has been added to the group communication system, the subframe information of the bearer group communication data can be directly determined by the multicast control information, and then the corresponding group communication data is obtained, and if the UE transmits the multicast through the broadcast mode at e B After the control information is added to the group communication system, the multicast control information broadcast by the eNB cannot be received in time. In this case, the UE can obtain the multicast control information through step S201 and step S202, and then directly pass the multicast control. The information receiving group communication data does not need to wait for the next period to receive the multicast control information broadcast by the eNB, and then receives the group communication data, thereby having the technical effect of reducing the delay.

 In a specific implementation process, in step S201, the request information received by the GCSE AS includes multiple types of information, such as: UE identity, authentication authentication information, identity, Qos (Quality of Service) information, and UE itself. The capability parameter of the information received, the one or more information of the group number that the UE requests to join the group, and the like are not limited in the embodiment of the present application.

 In step S202, the information acquired by the UE may include only the multicast control information, and may also include some other information. For example, the information acquired by the UE is an MCCH (Multicast Control Channel) message, and the MCCH message includes The multicast control information includes the control field corresponding to other multicast services, which is not limited in this embodiment of the present application.

 In the specific implementation process, the multicast control information is the MBMS bearer information that the UE joins the group, and provides some auxiliary information, which is used to help the UE read the service data, where the multicast control information indicates the receiving mode and the receiving address of the group communication data. The receiving address is used to indicate a subframe allocation of an MBSFN (Multicast/Multicast Single Frequency Network) area, by which the UE can receive group communication data from the corresponding subframe. .

For example, the multicast control information includes an MSP (MBMS scheduling period) configuration, and the MSP configuration is configured with subframe information for transmitting MBMS in a scheduling period, for example: subframes 1, 3, 5, and 7 The MSI (MBMS scheduling information) information may be obtained from the first subframe of the current MSP (for example, subframe 1), and the correspondence between the subframe and the specific multicast control information is indicated in the MSI. Further, the subframe of the transmission data may be determined by using the multicast control information, and then the UE may obtain the group communication data carried by the subframe. In step S202, the manner of acquiring the multicast control information is different based on the information included in the request message for requesting the group in step S201, and two of them are introduced below, of course, in the specific implementation process. , is not limited to the following two situations.

 As a first alternative implementation, the GCSE AS may determine the UE identity of the UE by using the request message that is requested by the request, for example: 1. The message carrying the UE identifier is displayed in the request message, that is, the request information explicitly includes The UE identifies the corresponding field, and the GCSE AS can directly obtain the UE identifier by reading the field. 2 The request message implicitly carries the UE identifier, that is, the request message does not include the field corresponding to the UE identifier, but the GCSE The AS may infer the UE identifier by using a combination of some information in the request information, for example, the request information includes a partial field of the UE identifier, and then the UE identifier and the like may be inferred through the partial field.

 The UE standard port and the port are: IMSI (International Mobile Subscriber Identity), P-TMSI (Packet Temperate Mobile Subscribe Identity), and a soft identifier assigned by the GCSE AS (also That is, a dedicated UE identifier is allocated by the GCSE. This identifier can be resolved only by the GCSE, and any other network element cannot be resolved. The identifier is independent of other levels of the UE identifier.

 Further, after determining the UE identifier corresponding to the UE by using the request message, the GCSE AS may send multicast control information to the UE by itself or through the serving node device of the UE according to the UE identifier, or the GCSE AS sends the indication MBMS to the terminal. The indication information of the carried identifier information, the indication information is used to instruct the terminal to acquire the multicast control information corresponding to the identifier information. The three situations will be introduced separately below.

 The first type, the multicast control information is sent to the UE by itself. Before the multicast control information is sent, the multicast control information needs to be obtained first. Referring to FIG. 4, the multicast control information can be obtained by:

 Step S401: The service MME of the GCSE AS to the UE (Mobility Management Entity:

The MME sends a request message, and the request message is used to request the request message for acquiring the multicast control information. Step S402: The GCSE AS receives the serving MME of the UE and obtains from the serving eNB or the MCE of the UE. And return the multicast control information.

 In a specific implementation, in step S401, the GCSE AS first determines the UE corresponding server to query the MME corresponding to the UE by using the UE identifier, and may also query the MEE from its own database, which is not limited in the embodiment of the present application.

 The GCSE AS then indicates to the serving MME: to request multicast control information;

 After receiving the indication message, the MME can request multicast control information in multiple manners. Two of them are described below.

 One of the possible implementation manners is that the MME determines the MCE (Multi-cell/multicast Coordination Entity: MCE) corresponding to the UE by using the UE identifier, and then sends the MCE to: request the multicast control information, and the MCE receives the request message. After that, the multicast control information corresponding to the UE is determined, and the multicast control information is sent to the GCSE AS;

 Another possible implementation manner is: the MME determines the MCE corresponding to the UE by using the UE identifier, and then obtains the MBSFN area ID (Multimedia Broadcast Multicast Network Area ID) of the cell where the UE is located from the MCE; The serving eNB (E-UTRAN NodeB: base station) corresponding to the UE then sends to the serving eNB: requesting multicast control information, where the multicast control information is requested to include the MBSFN area ID; and after receiving the request message, the serving eNB The multicast control message corresponding to the UE is determined by using the MBSFN area ID, and the multicast control information is sent to the GCSE AS.

 When the multicast control information is sent to the GCSE AS, the MBMS bearer service may be sent to the GCSE AS, for example, if the MBMS bearer service is in an inactive state (or preempted state). When the GCSE AS sends the multicast control information to the UE, it also indicates that the service is in an inactive state (or the preempted state), or the GCSE AS can also directly in the inactive state (or the preempted state) of the service. The multicast control information is not sent to the UE.

After receiving the multicast control information based on step S402, the GCSE AS directly sends the multicast control information to the UE, and the GCSE AS can also send the MBMS bearer service to the UE in an activated state (or a preempted state). The second method is to send the multicast control information to the UE by using the serving node device of the UE, which specifically includes:

The GCSE AS sends an indication message to the serving MME of the UE, where the indication message is used to indicate that the serving MME of the UE triggers the serving eNB of the UE to send multicast control information to the UE.

 In a specific implementation process, the GCSE AS first searches for the MME corresponding to the UE according to the UE identifier, and then indicates to the MME: sending multicast control information to a certain UE;

 The MME determines the range in which the UE is located according to the UE identifier, and then finds the MCE corresponding to the UE, and then obtains the MBSFN area ID of the cell where the UE is located from the MCE;

 Then, the MME determines the serving eNB corresponding to the UE according to the UE identifier, and then sends an indication message to the serving eNB, where the indication message includes the MBSFN area ID, and then the eNB is notified by the MBSFN area ID to send the multicast control information to the UE. When the eNB sends the multicast control information to the UE, the eNB can also send the MBMS bearer service to the UE in the active state (or the preempted state). For example, if the MBMS bearer service is in the inactive state (or the preempted state), When the eNB sends the multicast control information to the UE, it also indicates that the service is in an inactive state (or a preempted state). Or, when the service is in an inactive state (or preempted state), the multicast control information is not directly sent to the UE.

 The method is different from the first method in that, when the multicast control information is sent to the UE, it does not need to be forwarded by the GCSE AS, but is directly sent to the UE through the eNB, thereby saving the multicast control information to the UE. The time of the UE further achieves the technical effect of further reducing the delay.

 The third type, the GCSE AS sends the indication information indicating the identifier information of the MBMS bearer to the terminal, where the indication information is used to instruct the terminal to obtain the multicast control information corresponding to the identifier information. In this case, the GCSE AS needs to obtain the first inclusion. For the identification information carried by the MBMS, refer to Figure 5, for example, the identifier information of the MBMS bearer can be obtained by the following methods:

 Step S501: The GCSE AS sends a request message to the serving MME of the UE, where the request message is used to request to obtain the MBSFN area ID of the cell where the UE is located;

 Step S502: The GCSE AS receives the MBSFN area ID that the MME obtains and returns from the MCE of the UE.

In a specific implementation process, in step S501, the GCSE AS first determines the MME corresponding to the UE by using the UE identifier, and then indicates to the MME: requesting the MCCH message; In step S502, the MME determines the MCE of the cell where the UE is located according to the identifier of the UE, and queries the MCE for the MBSFN area ID (Multimedia Broadcast multicast service ID: ID or identifier) of the cell where the UE is located;

 Then the MCE returns an MBSFN area ID to the MME;

 The MME then returns the MBSFN area ID to the GCSE AS.

 After receiving the MBSFN area ID returned by the MME based on the step S502, the GCSE AS sends the MBSFN area ID to the UE, and the UE requests the eNB corresponding to the UE to obtain the multicast control information by using the MBSFN area ID. In general, the eNB A plurality of MBSFN areas are corresponding to each other, and a plurality of multicast control information corresponding to the plurality of MBSFN areas are also stored. Therefore, the eNB determines the multicast control information corresponding to the MBSFN area ID from the plurality of multicast control information according to the MBSFN area ID requested by the UE, and sends the multicast control information corresponding to the MBSFN area ID to the UE. When the multicast control information is sent to the UE by the eNB, the MBMS bearer service may be sent to the UE in an activated state (or the preempted state). For example, if the service is in an inactive state (or preempted state), the eNB will When the multicast control information is sent to the UE, the service is in the inactive state (or the preempted state), or the multicast control information is not directly sent to the UE when the service is in the inactive state (or the preempted state).

 The third mode differs from the first mode and the second mode in that, in the first mode or the second mode, the UE passively accepts multicast control information, and in the third mode, the UE actively requests the acquisition group. Broadcast control information.

 As a second optional implementation, when the request information includes the group number of the group in which the UE is located, the GCSE AS may first obtain the identifier information including the MBMS bearer, where the identifier information is, for example: the TMGI of the UE ( Temporary Mobile Group Identity) : Temporary Mobile Group Identifier) or MBMS session ID;

 In a specific implementation process, because the request message includes the group number that the UE requests to join the group, the GCSE AS may directly map the group number to the MBMS service identifier TMGI; or map to the MBMS session ID;

In this case, the GCSE AS sends an indication message containing the identification information of the MBMS bearer to the UE. The indication information is used to instruct the UE to obtain the multicast control information corresponding to the identifier information, specifically:

The GCSE AS sends the TMGI or MBMS session ID to the UE, and the TMGI or MBMS session ID is used by the UE to request the UE's serving eNB to obtain the multicast control information; wherein the GCSE AS maps the group number to the TMGI or the MBMS session ID. Return to the UE;

 After receiving the TMGI or the MBMS session ID, the UE requests the serving eNB connected to the UE to obtain the multicast control message by using the TMGI or the MBMS session ID as a key.

 The serving eNB connected to the UE obtains the corresponding multicast control information according to the TMGI or the MBMS session ID, and sends the multicast control information to the UE through dedicated signaling, and when the multicast control information is sent from the serving eNB to the UE, the MBMS can also be used. Whether the bearer service is in an active state (or preempted state) is sent to the UE. Or, when the MBMS bearer service is in an inactive state (or in a preempted state), the multicast control information is not directly sent to the UE.

 As shown in the above solution, since the interaction between the UE, the GCSE AS, and the eNB is only required when the multicast control information is acquired, and the interaction step is less than the previous step of obtaining the multicast control information by using the UE identifier, It can improve the speed of obtaining multicast control information, and further reduce the delay.

 After the UE obtains the multicast control information based on step S202, if the GCSE AS bearer service is in an active state, the UE can immediately receive the group communication data through the MSMS bearer. If the GCSE AS bearer service is in an inactive state (or preempted state), then the UE is in a state of waiting for reception.

 In a second aspect, based on the same inventive concept, the embodiment of the present application provides a method for transmitting data, where the method is applied to an eNB. Referring to FIG. 6, the method for transmitting data specifically includes the following steps: Step S601: The eNB receives a control message. ;

 Step S602: The eNB sends multicast control information to the UE or sends multicast control information to the GCSE AS based on the control message, where the GCSE AS is used to forward the multicast control information to the UE, and the multicast control information is used to enable the UE to acquire the group communication data. . Optionally, the multicast control information is specifically: MBMS bearer information that the UE joins the group.

Optionally, the eNB receives the control message in step S601, where the eNB receives the identifier information request message that is sent by the UE and includes the indication that the MBMS bearer is sent, and the request message is used to request the acquisition and the identifier. Multicast control information corresponding to the information.

 Optionally, the identifier information is specifically: a multimedia multicast area identifier of a cell where the UE is located, or a TMGI of the UE or an MBMS session ID of the cell where the UE is located;

 In step S601, the eNB sends the multicast control information to the UE according to the control message, where the eNB sends the multicast control information corresponding to the multimedia multicast area identifier or the TMGI or the MBMS session ID to the UE.

 Optionally, the eNB receives the control message in step S601, where the eNB receives the indication information that is sent by the serving MME of the UE, where the indication information is sent by the GCSE AS to the serving MME, and is used to indicate that the eNB sends the multicast control information to the UE. Or

 The eNB receives the control message, specifically: the eNB receives the indication information sent by the serving MME of the UE, and the indication information is sent by the GCSE AS to the serving MME, and is used to instruct the eNB to send the multicast control information to the GCSE AS.

 In a third aspect, based on the same inventive concept, the embodiment of the present application provides a method for acquiring a message, where the method is applied to a UE, and the method includes:

 Step S701: The UE sends a request message for clearing the incoming group to the GCSE AS.

 Step S702: The UE receives the multicast control information, and the multicast control information is sent by the GCSE AS to the UE according to the request message by itself or the serving node device of the UE. Alternatively, the UE receives the indication information that is sent by the GCSE AS and includes the identifier information indicating the MBMS bearer. Obtaining, according to the indication information, multicast control information corresponding to the identifier information, where the multicast control information is used to enable the UE to acquire group communication data. Optionally, the multicast control information is specifically: the MBMS bearer information that the UE joins the group.

 Optionally, the UE receives the multicast control information, and the multicast control information is sent by the GCSE AS to the UE according to the request message, specifically:

The UE receives the multicast control message sent by the GCSE AS, and the multicast control message is obtained by the GCSE AS by sending an indication message to the serving MME of the UE, and the indication message is used by the serving MME to send the MCE to the serving eNB or the UE and indicate the service. The eNB or MCE sends multicast control information to the GCSE AS. Optionally, the UE receives the multicast control information, and the multicast control information is sent by the GCSE AS to the UE by using the serving node device of the UE according to the request message, specifically:

 The UE receives the multicast control information that is sent by the serving eNB of the UE, and the multicast control information is obtained by the GCSE AS sending an indication message to the serving MME of the UE, and the indication message is used by the serving MME to send to the serving eNB and instruct the serving eNB to the UE. Send multicast control information.

 Optionally, the UE receives the indication information that is sent by the GCSE AS and includes the identifier information that is instructed by the MBMS7, and obtains the multicast control information corresponding to the identifier information according to the indication information. Referring to FIG. 8, the method specifically includes:

 Step S801: The UE receives the MBSFN area ID of the cell where the UE is located from the GCSE AS, and the MBSFN area ID is obtained by the GCSE AS sending an indication message to the serving MME of the UE, where the indication message is used to indicate that the serving MME obtains the MBSFN area ID from the MCE of the UE and The MBSFN area ID is returned to the GCSE AS;

 Step S802: The UE sends the MBSFN area ID to the serving eNB of the UE.

 Step S803: The UE receives the multicast control information that the serving eNB acquires and returns according to the MBSFN area ID.

 Optionally, the UE receives the indication information that is sent by the GCSE AS and includes the identifier information indicating the MBMS bearer, and obtains the multicast control information corresponding to the identifier information according to the indication information, which specifically includes:

 The UE receives the TMGI or MBMS session ID of the UE from the GCSE AS, and the TMGI or MBMS session ID is obtained by the GCSE AS from the request message for requesting the group sent by the UE;

 The UE requests the serving eNB of the UE to acquire multicast control information corresponding to the TMGI or MBMS session ID;

 The UE receives the multicast control information corresponding to the TMGI or MBMS session ID transmitted by the serving eNB of the UE.

The following describes the method for transmitting data and the method for obtaining data according to the embodiment of the present application. The following embodiments mainly describe several specific implementation processes of interaction between the GCSE AS, the eNB, and the UE. . It should be noted that the embodiments in the present application are only used to explain the present application, and cannot be used to limit the present application. All embodiments consistent with the idea of the present application are in the present application. Within the scope of protection, those skilled in the art will naturally know how to adapt to the idea of the present application.

 Embodiment 1

 In this embodiment, the eNB directly sends the multicast control information to the UE. Since the group communication system establishes the MBMS bearer and performs data transmission through the established MBMS bearer in the first aspect of the embodiment of the present application, The application of the first embodiment is based on the established MBMS bearer. The method for the newly added UE to obtain the multicast control information is as follows: Referring to FIG. 9, the interaction process specifically includes the following steps:

 Step S901: The newly-joined UE sends a request message to the GCSE AS requesting to join the group, where the message shows that the UE identifier is carried, specifically: IMSI (assumed to be: 460023513574685), and then joins the group, the first three digits in the IMSI. 460" indicates that the country is China, the fourth and fifth digit "02" indicates the operator, and the last ten digits are freely allocated;

 Step S902: The GCSE AS searches the HSS for the MME corresponding to the UE according to the IMSI of the UE, and indicates to the MME that: the MCCH message is sent to a certain UE;

 Step S903: The MME finds the MCE of the cell where the UE is located according to the IMSI of the UE, and queries the MCE for the MBSFN area ID of the cell, and the MCE returns the MBSFN area ID corresponding to the cell to the MME, and the MCE finds the UE according to the IMSI corresponding to the UE. Corresponding eNB, and sending an indication message to the eNB: instructing the eNB to send an MCCH message to the UE, where the indication message includes an MBSFN area ID;

 Step S904: The eNB does not need to wait for the repeated transmission mechanism of the multicast control information, and sends the multicast control information corresponding to the MBSFN area ID to the UE as soon as possible. And, when the multicast control information is sent, whether the MBMS bearer service is in an active state (or a preempted state) is sent to the UE; or when the MBMS bearer service is in an inactive state (or in a preempted state), directly The multicast control information is not sent to the UE.

Step S905: After the UE receives the multicast control information, if the MBMS bearer service is in an active state, the UE immediately receives the group communication data through the MBMS bearer; and if the MBMS bearer service is in an inactive state (or the preempted state), then the UE Waiting to receive status. Embodiment 2

 In this embodiment, the eNB forwards the multicast control information to the UE through the GCSE AS. Since the group communication system establishes the MBMS bearer and performs data transmission through the established MBMS bearer in the first aspect of the embodiment of the present application, In the first embodiment of the present application, based on the established MBMS bearer, how to obtain the multicast control information by the newly added UE, refer to FIG. 10, where the interaction process specifically includes the following steps:

 Step S1001: The UE that joins the group sends a request message to the GCSE AS requesting to join the group, where the message shows that the UE identifier is carried, specifically: P-TMSI, (usually a 40-bit string) and then joins the group;

 Step S1002: The GCSE AS searches the HSS for the MME corresponding to the UE according to the P-TMSI of the UE, and indicates to the MME: requesting the MCCH message;

 Step S1003: The MME finds the MCE of the cell where the UE is located according to the P-TMSI of the UE, and obtains the MBSFN area ID of the cell where the UE is located from the MCE; and the MME determines the eNB corresponding to the UE according to the UE identifier, and then sends the eNB to the eNB: requesting multicast Control information (including MBSFN area ID);

 Step S104: When the service for transmitting the multicast control message between the eNB and the GCSE AS is in an active state, the eNB sends the multicast control information to the GCSE AS, otherwise, it is in a waiting for sending state; Step S1005: Between the GCSE AS and the UE When the service transmitting the multicast control message is active, the GCSE AS sends the multicast control information to the UE. If the service is inactive (or preempted), the GCSE AS sends multicast control information to the UE, indicating that the service is in an inactive state (or preempted state). Or, when the MBMS service is in an inactive state (or is in a preempted state), the multicast control information is not directly sent to the UE.

 Step S1006: After receiving the multicast control information, if the MBMS bearer service is in an active state, the UE immediately receives the group communication data through the bearer. If the MBMS bearer service is in an inactive state (or preempted state), the UE is in a waiting state.

 Embodiment 3

In this embodiment, the UE requests to acquire the multicast control information, as in the embodiment of the present application. On the one hand, the process of establishing an MBMS bearer by the group communication system and performing data transmission through the established MBMS bearer has been introduced. Therefore, in the first embodiment of the present application, how to obtain the multicast control information by the newly added UE based on the established MBMS bearer, please refer to Figure 11, the interaction process specifically includes the following steps:

 Step 1101: The newly joined UE requests the GCSE AS to join the group, and the message carries the UE identifier, which is specifically: a soft identifier assigned by the GCSE AS (for example: 12345678).

 Step 1102: The GCSE AS searches for the MME corresponding to the UE from its own database according to the soft identifier, and indicates to the MME that: the MCCH message is requested.

 Step 1103: The MME finds the MCE corresponding to the cell where the UE is located according to the soft identifier, and queries the MCE for the MBSFN area ID corresponding to the cell.

 Step S1104: The MCE returns the MBSFN area ID corresponding to the cell to the MME.

 Step S1105: The MME returns the MB SFN area corresponding to the cell where the UE is located to the GCSE AS.

ID.

 Step 1106: The GCSE AS indicates to the UE the MBSFN area ID of the group service. Step 1107: The UE requests an MCCH message from the eNB, and carries the keyword MBSFN area ID. Step 1108: The eNB queries the corresponding MCCH message according to the MBSFN area ID requested by the UE, and sends the message to the UE.

 Step 1109: After receiving the MCCH message, the UE immediately receives the group communication data through the MBMS bearer.

 Embodiment 4

 In this embodiment, the UE sends the group name of the group to the GCSE AS, and then obtains the TMGI from the GCSE AS by using the group name, and then acquires the multicast control information from the eNB through the TMGI, which is still based on the The established MBMS bearer describes how the newly added UE obtains multicast control information. Referring to FIG. 12, the interaction process includes the following steps:

Step S1201: The UE that joins the group sends a request message requesting to join the group to the GCSE AS, where the message shows that the UE identifier is carried. At the same time, the UE notifies the GCSE AS of the group name that it wishes to join the group; Step S1202: The GCSE-AS maps the group number notified by the UE to the MBMS service identifier TMGI; and then sends the mapping result (ie, TMGI) to the UE;

 Step S1203: The UE uses the TMGI as a key to request multicast control information from the e B. Step S1204: The eNB finds a corresponding multicast control message according to the TMGI, and determines whether the service for transmitting the multicast control information between the eNB and the UE is activated. State (or preempted state), when the service is in an active state, the multicast control information is directly sent to the UE through dedicated signaling; and when the service is in an inactive state (or preempted state), it is in a waiting state. ;

 Step S1205: After receiving the multicast control information, the UE directly receives the group communication data through the MBMS bearer.

 In a fourth aspect, based on the same inventive concept, the embodiment of the present application provides an apparatus for transmitting a message. Referring to FIG. 13, the method specifically includes:

 The receiving module 130 is configured to receive a request message sent by the UE for requesting the grouping;

 The sending module 131 is connected to the receiving module 130, and configured to: after the receiving module 130 receives the request information, send the multicast control information to the UE by itself or through the serving node device of the UE according to the request message, or send the indication to the UE. The indication information of the identifier information carried by the MBMS, the indication information is used to instruct the UE to acquire the multicast control information corresponding to the identifier information, and the multicast control information is used to enable the UE to acquire the group communication data.

 Optionally, the multicast control information is specifically: the MBMS bearer information that the UE joins the group.

 Optionally, the sending module 131 is specifically configured to: send a request message to the serving MME of the UE, where the request message is used to request a request message for acquiring the multicast control information;

 The receiving module 130 is further configured to: after the sending module 131 sends the request message, the serving MME of the receiving UE indicates the multicast control information acquired and returned by the serving eNB or the MCE of the UE;

 The sending module 131 is further configured to: send the multicast control information to the UE.

 Optionally, the sending module 131 is specifically configured to:

 Sending an indication message to the serving MME of the UE, the indication message is used to indicate that the serving MME of the UE triggers the serving eNB of the UE to send the multicast control information to the UE.

Optionally, the sending module 131 is further configured to: send a request message to the serving MME of the UE, requesting The message is used to request to obtain an MBSFN area ID of a cell where the UE is located;

 The receiving module 130 is further configured to: after the sending module 131 sends the request message, receive an MBSFN area ID that is obtained and returned by the service MME from the MCE of the UE;

 The sending module 131 is further configured to: send, to the UE, indication information that includes an MBSFN area ID, where the indication information is used to enable the UE to obtain, from the serving eNB, the multicast control information corresponding to the MBSFN area ID.

 Optionally, the method further includes: a determining module, configured to be connected to the sending module 131, configured to determine, by using the request message, a UE identifier of the UE;

 The sending module 131 is further configured to: after the determining module determines the UE identifier, send the multicast control information to the UE by using the UE or the serving node device of the UE, or send the identifier information indicating the MBMS bearer to the UE according to the identifier of the UE. The indication information is used to instruct the UE to acquire the multicast control information corresponding to the identifier information.

 Optionally, the method further includes: a determining module, configured to be connected to the sending module 131, configured to determine a TMGI or MBMS session ID of the UE from the request message;

 The sending module 131 is further configured to: after the determining module determines the TMGI or the MBMS session ID, send, to the UE, request information including a TMGI or an MBMS session ID, where the indication information is used to indicate that the UE requests the serving eNB of the UE to acquire the TMGI or the MBMS. Multicast control information corresponding to the session ID.

 The fifth aspect is based on the same inventive concept. The embodiment of the present application provides a device for transmitting a message. Referring to FIG. 14, the device includes:

 The receiving module 140 is configured to receive a control message.

 The sending module 141 is connected to the receiving module 140, and configured to send multicast control information to the UE or send multicast control information to the GCSE AS based on the control message after the receiving module 140 receives the control message, where the GCSE AS is configured to perform multicast control. The information is forwarded to the UE, and the multicast control information is used to enable the UE to acquire group communication data.

 Optionally, the multicast control information is specifically: the MBMS bearer information that the UE joins the group.

Optionally, the receiving module 140 is specifically configured to: receive, by the UE, a request message that includes the identifier information indicating the MBMS bearer, where the request message is used to request to obtain the multicast control information corresponding to the identifier information. Optionally, the identifier information is specifically: an MBSFN area ID of the cell where the UE is located, or a TMGI of the UE or an MBMS session ID of the cell where the UE is located;

 The sending module 141 is specifically configured to: send, to the UE, multicast control information corresponding to the MBSFN area lD or the TMGI or the MBMS session ID.

 Optionally, the receiving module 140 is configured to: receive the indication information sent by the serving MME of the UE, where the indication information is sent by the GCSE AS to the serving MME, and is used to instruct the sending module to send the multicast control information to the UE; or

 The receiving module 140 is specifically configured to: receive the indication information sent by the serving MME of the UE, where the indication information is sent by the GCSE AS to the serving MME, and is used to instruct the sending module to send the multicast control information to the GCSE AS.

 In a sixth aspect, based on the same inventive concept, the embodiment of the present application provides an apparatus for acquiring a message. Referring to FIG. 15, the method specifically includes:

 The sending module 150 is configured to send, to the GCSE AS, a request message for requesting the grouping;

 The receiving module 151 is connected to the sending module 150, and is configured to: after the sending module 150 sends the request message, receive the multicast control information, where the multicast control information is sent by the GCSE AS to the UE according to the request message by itself or the serving node device of the UE; or The UE receives the indication information that is sent by the GCSE AS and includes the identifier information indicating the MBMS bearer, and obtains the multicast control information corresponding to the identifier information according to the indication information. The multicast control information is used to enable the UE to acquire the group communication data.

 Optionally, the multicast control information is specifically: the MBMS bearer information that the UE joins the group.

 Optionally, the receiving module 151 is specifically configured to:

 Receiving a multicast control message sent by the GCSE AS, the multicast control message is obtained by the GCSE AS by sending an indication message to the serving MME of the UE, and the indication message is used by the serving MME to send the MCE to the serving eNB or the UE and indicate the serving eNB. Or the MCE sends multicast control information to the GCSE AS.

 Optionally, the receiving module 151 is specifically configured to:

And receiving the multicast control information sent by the serving eNB of the UE, where the multicast control information is obtained by the GCSE AS sending an indication message to the serving MME of the UE, where the indication message is sent by the serving MME to the serving eNB and the serving eNB is sent to the UE. Multicast control information. Optionally, the receiving module 151 is further configured to: receive, by the GCSE AS, an MBSFN area ID of the cell where the UE is located, where the MBSFN area ID is obtained by the GCSE AS sending an indication message to the serving MME of the UE, where the indication message is used to indicate that the serving MME is from the UE. The MCE obtains the MBSFN area ID and returns the MBSFN area ID to the GCSE AS;

 The sending module 150 is further configured to: after the receiving module 151 receives the MBSFN area ID,

The MBSFN area ID is sent to the serving eNB of the UE;

 The receiving module 151 is further configured to: after the sending module 150 sends the MBSFN area ID, receive the multicast control information that is obtained and returned by the service eNB according to the MBSFN area ID.

 Optionally, the receiving module 151 is further configured to: receive, by the GCSE AS, a TMGI or an MBMS session ID of the UE, where the TMGI or the MBMS session ID is obtained by the GCSE AS from the requesting message sent by the UE;

 The sending module 150 is further configured to: after the receiving module 151 receives the TMGI or the MBMS session ID, request the serving eNB of the UE to obtain the multicast control information corresponding to the TMGI or the MBMS session ID;

 The receiving module 151 is further configured to: after the sending module 150 sends the TMGI or the MBMS session ID, receive the multicast control information corresponding to the TMGI or MBMS session ID sent by the serving eNB of the UE.

 In a seventh aspect, based on the same inventive concept, the embodiment of the present application provides a GCSE AS. Please refer to FIG. 16, which specifically includes:

 a data transmission interface 160, configured to receive a request message sent by the UE for requesting to join the group;

 The processor 161 is connected to the data transmission interface 160, and configured to: after the data transmission interface 160 receives the request message, send the multicast control information to the UE by using the data transmission interface 160 according to the request message; or send the indication to the UE that the MBMS bearer is included. The indication information is used to indicate that the UE acquires multicast control information corresponding to the identifier information, and the multicast control information is used to enable the UE to acquire group communication data. Optionally, the multicast control information is specifically: the MBMS bearer information that the UE joins the group.

Optionally, the processor 161 is further configured to: send, by using the data transmission interface 160, a request message to the serving MME of the UE, where the request message is used to request a request message for acquiring the multicast control information; And receiving, by the data transmission interface 160, the serving MME of the UE indicating the serving eNB of the UE or

Multicast control information obtained and returned by the MCE.

 Optionally, the processor 161 sends the multicast control information to the UE by using the serving node device of the UE, specifically:

 The processor 161 sends an indication message to the serving MME of the UE through the data transmission interface, where the indication message is used to indicate that the serving MME of the UE triggers the serving eNB of the UE to send the multicast control information to the UE.

 Optionally, the processor 161 is further configured to: send, by using the data transmission interface 160, a request message to the serving MME of the UE, where the request message is used to request to obtain an MBSFN area ID of the cell where the UE is located, and receive the serving MME from the data transmission interface. The MBSFN area ID obtained and returned by the MCE of the UE;

 The processor 161 is configured to send, to the UE, indication information that includes the identifier information indicating the MBMS bearer, where the indication information is used to instruct the UE to obtain the multicast control information corresponding to the identifier information, specifically:

 The processor 161 sends the MBSFN area ID to the UE through the data transmission interface, and the MBSFN area ID is used to request the UE to obtain the multicast control information from the serving eNB.

 Optionally, the processor 161 is further configured to: determine, by using the request message, the UE identifier of the UE; the processor 161 sends the multicast control information to the UE by using the data transmission interface 160 or the serving node device of the UE according to the request message, or Sending, to the UE, the indication information that includes the identifier information indicating the MBMS bearer, where the indication information is used to instruct the UE to obtain the multicast control information corresponding to the identifier information, specifically:

 The processor sends the multicast control information to the UE by using the data transmission interface or the serving node device of the UE according to the UE identifier, or the GCSE AS sends the indication information including the identifier information indicating the MBMS bearer to the UE, and the indication information is used by the The UE is instructed to acquire multicast control information corresponding to the identification information.

 Optionally, the processor 161 is further configured to: determine a TMGI or an MBMS session ID of the UE from the request message;

 The processor 161 is configured to send, to the UE, the indication information that is used to indicate the identifier information of the MBMS bearer, where the indication information is used to instruct the UE to obtain the multicast control information corresponding to the identifier information, specifically:

The processor 161 sends the TMGI or MBMS session ID to the UE through the data transmission interface 160. The TMGI or MBMS session ID is used by the UE to request acquisition of multicast control information from the serving eNB of the UE. The eighth aspect, based on the same inventive concept, the embodiment of the present application provides an eNB. Referring to FIG. 17, the method specifically includes:

 a data transmission interface 170, configured to receive a control message;

 The processor 171 is connected to the data transmission interface 170, and is configured to send multicast control information to the UE or send multicast control information to the GCSE AS based on the control message after the data transmission interface 170 receives the control information, and the GCSE AS is used to The multicast control information is forwarded to the UE, and the multicast control information is used to enable the UE to acquire group communication data.

 Optionally, the multicast control information is specifically: the MBMS bearer information that the UE joins the group.

 Optionally, the data transmission interface 170 is configured to: receive an identifier information request message that is sent by the UE and that is sent to the MBMS bearer, where the request message is used to request to obtain the multicast control information corresponding to the identifier information.

 Optionally, the identifier information is specifically: an MBSFN area ID of the cell where the UE is located, or a TMGI of the UE or an MBMS session ID of the cell where the UE is located;

 The processor 171 sends the multicast control information to the UE through the data transmission interface 170 based on the control message. Specifically, the processor 171 sends the multicast control information corresponding to the MBSFN area ID or the TMGI or the MBMS session ID to the UE through the data transmission interface.

 Optionally, the data transmission interface 170 is specifically configured to: receive the indication information sent by the serving MME of the UE, where the indication information is sent by the GCSE AS to the serving MME, and is used to instruct the data transmission interface to send the multicast control information to the UE; or

 The data transmission interface 170 is specifically configured to: receive the indication information sent by the serving MME of the UE, where the indication information is sent by the GCSE AS to the serving MME, and is used to instruct the data transmission interface to send the multicast control information to the GCSE AS.

 The ninth aspect, based on the same inventive concept, the embodiment of the present application provides a UE. Referring to FIG. 18, the method specifically includes:

 The processor 180 and the data transmission interface 181;

The processor 180 is configured to pass the data transmission interface 181 after determining the request information for requesting the grouping. Sending a request message requesting enqueue to the GCSE AS;

 The data transmission interface 181 is configured to: receive indication information that is returned by the GCSE AS according to the request message, and includes identifier information indicating that the MBMS bears;

 The processor 180 is further configured to: obtain, according to the indication information, the multicast control information corresponding to the identifier information from the service e B of the UE by using the data transmission interface 181, where the multicast control information is used to enable the UE to acquire the group communication data;

 The data transmission interface 181 is further configured to: receive multicast control information.

 Optionally, the multicast control information is specifically: the MBMS bearer information that the UE joins the group.

 Optionally, the data transmission interface 181 receives the indication indication that the GCSE AS returns according to the request message.

The indication information of the identifier information carried by the MBMS is specifically:

 The data transmission interface 181 receives the MBSFN area ID of the cell where the UE is located from the GCSE AS,

The MBSFN area ID is obtained by the GCSE AS sending an indication message to the serving MME of the UE, and the indication message is used to indicate that the serving MME obtains the MBSFN area ID from the MCE of the UE and returns the MBSFN area ID to the GCSE AS;

 The processor 180 obtains, according to the indication information, the multicast control information corresponding to the identifier information from the serving eNB of the UE through the data transmission interface 181, specifically:

 The processor 180 requests the serving eNB of the UE to acquire the multicast control information corresponding to the MBSFN area ID through the data transmission interface 181.

 Optionally, the data transmission interface 181 receives the indication information that is returned by the GCSE AS according to the request message and includes the identifier information indicating the MBMS bearer, which is specifically:

 The data transmission interface 181 receives the TMGI or MBMS session ID of the UE from the GCSE AS, and the TMGI or MBMS session ID is obtained by the GCSE AS from the request message for requesting the group sent by the UE;

 The processor 180 obtains, according to the indication information, the multicast control information corresponding to the identifier information from the serving eNB of the UE through the data transmission interface 181, specifically:

 The processor 181 requests the UE's serving eNB to acquire the TMGI or through the data transmission interface.

Multicast control information corresponding to the MBMS session ID. The technical solution provided by the present application has at least the following technical effects or advantages: In the embodiment of the present application, after receiving the request message sent by the UE, the GCSE AS itself or the service node of the UE The device sends the multicast control information to the UE, or the GCSE AS instructs the UE to obtain the multicast control information, that is, after the UE joins the group, the multicast control information can be directly obtained, and the group communication data is directly obtained through the multicast control information. The group communication data is acquired after waiting for the multicast control information to be periodically sent, so that the technical effect of reducing the delay of the data transmission is achieved.

 Those skilled in the art will appreciate that embodiments of the present application can be provided as a method, system, or computer program product. Thus, the application can be in the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.

 The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the present application. It will be understood that each flow and/or block of the flowcharts and/or block diagrams, and combinations of flow and/or blocks in the flowcharts and/or block diagrams can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

 The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. Instructions are provided for implementation in the flowchart The steps of a process or a plurality of processes and/or block diagrams of a function specified in a block or blocks.

 Although the preferred embodiment of the present application has been described, those skilled in the art can make additional changes and modifications to the embodiments once they are aware of the basic inventive concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all modifications and

 It is apparent that those skilled in the art can make various modifications and variations to the embodiments of the present application without departing from the spirit and scope of the embodiments of the present application. Therefore, it is intended that the present invention cover the modifications and variations of the present invention.

Claims

Rights request 1. A method of transmitting messages, characterized by including: The application server of the group communication service receives the request message sent by the terminal requesting to join the group; the application server of the group communication service sends the multicast control to the terminal by itself or through the service node device of the terminal according to the request message. information, or, the application server of the group communication service sends to the terminal instruction information including identification information indicating the multimedia broadcast multicast service MBMS bearer, the instruction information is used to instruct the terminal to obtain all the information corresponding to the identification information. The multicast control information is used to enable the terminal to obtain group communication data. 2. The method of claim 1, wherein the multicast control information is specifically: MBMS bearer information for the group the terminal joins. 3. The method according to claim 1 or 2, characterized in that, before sending the multicast control information to the terminal through itself, the method further includes: The application server of the group communication service sends a request message to the service mobility management entity of the terminal, where the request message is used to request acquisition of the multicast control information; The application server of the group communication service receives the multicast control information that the serving mobility management entity of the terminal instructs the serving base station or multi-cell coordination entity of the terminal to obtain and return. 4. The method according to claim 1 or 2, characterized in that: sending multicast control information to the terminal through the service node device of the terminal specifically includes: The application server of the group communication service sends an instruction message to the serving mobility management entity of the terminal. The instruction message is used to instruct the serving mobility management entity of the terminal to trigger the serving base station of the terminal to send the Multicast control information. 5. The method of claim 1 or 2, wherein the application server of the group communication service sends indication information containing identification information indicating the MBMS bearer to the terminal, and the indication information is used to instruct the terminal. Before obtaining the multicast control information corresponding to the identification information, the method further includes: The application server of the group communication service sends a request to the service mobility management entity of the terminal message, the request message is used to request to obtain the multimedia multicast area identifier of the cell where the terminal is located; The application server of the group communication service receives the multimedia multicast area identification obtained and returned by the service mobility management entity from the multi-cell coordination entity of the terminal; The application server of the group communication service sends instruction information containing identification information indicating the MBMS bearer to the terminal. The instruction information is used to instruct the terminal to obtain the multicast control information corresponding to the identification information, specifically: The application server of the group communication service sends instruction information including the multimedia multicast area identifier to the terminal, and the instruction information is used to cause the terminal to request to obtain the multimedia multicast area identifier corresponding to the multimedia multicast area identifier from the serving base station. The multicast control information. 6. The method of claim 1, wherein the application server of the group communication service sends multicast control information to the terminal by itself or through a service node device of the terminal according to the request message. , or, the application server of the group communication service sends indication information containing identification information indicating the MBMS bearer to the terminal, where the indication information is used to instruct the terminal to obtain the multicast control information corresponding to the identification information before , the method also includes: The application server of the group communication service determines the terminal identification of the terminal through the request message; The application server of the group communication service sends multicast control information to the terminal by itself or through the service node device of the terminal according to the request message, or the application server of the group communication service sends an instruction to the terminal. Indication information of the identification information carried by the MBMS. The indication information is used to instruct the terminal to obtain the multicast control information corresponding to the identification information, specifically: The application server of the group communication service sends multicast control information to the terminal by itself or through the service node device of the terminal according to the terminal identification, or the application server of the group communication service sends an instruction to the terminal. Indication information of the identification information carried by the MBMS. The indication information is used to instruct the terminal to obtain the multicast control information corresponding to the identification information. 7. The method according to claim 1, characterized in that, in the application service of the group communication service The server sends indication information including identification information indicating the MBMS bearer to the terminal, where the indication information is used to instruct the terminal to obtain the multicast control information corresponding to the identification information, and the method further includes: The application server of the group communication service determines the temporary mobile group identification code or the multimedia broadcast multicast session identification of the terminal from the request message; The application server of the group communication service sends instruction information containing identification information indicating the MBMS bearer to the terminal. The instruction information is used to instruct the terminal to obtain the multicast control information corresponding to the identification information, specifically: The application server of the group communication service sends the request information including the temporary mobile group identification code or the multimedia broadcast multicast session identification to the terminal, and the indication information is used to instruct the terminal to provide services to the terminal. The base station requests to obtain the multicast control information corresponding to the temporary mobile group identification code or the multimedia broadcast multicast session identification. 8. A message transmission method, characterized by including: The base station receives the control message; Based on the control message, the base station sends multicast control information to the terminal or sends the multicast control information to an application server of the group communication service, and the application server of the group communication service is used to transfer the multicast control information to the terminal. The information is forwarded to the terminal, and the multicast control information is used to enable the terminal to obtain group communication data. 9. The method of claim 8, wherein the multicast control information is specifically: multimedia broadcast multicast service MBMS bearer information of the group to which the terminal joins. 10. The method according to claim 8 or 9, wherein the base station receives a control message, specifically: the base station receives a request message sent by the terminal containing identification information indicating an MBMS bearer, and The request message is used to request to obtain the multicast control information corresponding to the identification information. 11. The method according to claim 10, wherein the identification information is specifically: the multimedia multicast area identification of the cell where the terminal is located or the temporary mobility group identification code of the terminal or the cell where the terminal is located. Multimedia broadcast multicast session identifier; The base station sends multicast control information to the terminal based on the control message, specifically: the base station sends the multimedia multicast area identifier or the temporary mobile group identification code or the multimedia multicast area identifier to the terminal. Multicast control information corresponding to the broadcast multicast session ID. 12. The method according to claim 8 or 9, characterized in that the base station receives a control message, specifically: the base station receives indication information sent by the serving mobility management entity of the terminal, and the indication information is provided by The application server of the group communication service is sent to the service mobility management entity, and is used to instruct the base station to send the multicast control information to the terminal; or The base station receives the control message, specifically: the base station receives the indication information sent by the serving mobility management entity of the terminal, the indication information is sent to the serving mobility management entity by the application server of the group communication service, and uses Instructing the base station to send the multicast control information to an application server of the group communication service. 13. A method of obtaining messages, characterized by including: The terminal sends a request message to join the group to the application server of the group communication service; The terminal receives multicast control information, and the multicast control information is sent to the terminal by the application server of the group communication service through itself or a service node device of the terminal according to the request message; or, the terminal Receive instruction information including identification information indicating the multimedia broadcast multicast service MBMS bearer sent by the application server of the group communication service, and obtain the multicast control information corresponding to the identification information according to the instruction information; the group The broadcast control information is used to enable the terminal to obtain group communication data. 14. The method of claim 13, wherein the multicast control information is specifically: MBMS bearer information for the group the terminal joins. 15. The method according to claim 13 or 14, characterized in that, the terminal receives multicast control information, and the multicast control information is sent by the application server of the group communication service through itself according to the request message. The terminal is specifically: The terminal receives the multicast control message sent by the application server of the group communication service, and the multicast control message sends an instruction to the service mobility management entity of the terminal through the application server of the group communication service. message obtained, the indication message is used to move by the service The management entity sends the multi-cell coordination entity to the serving base station or the terminal and instructs the serving base station or the multi-cell coordination entity to send the multicast control information to the application server of the group communication service. 16. The method according to claim 13 or 14, characterized in that, the terminal receives multicast control information, and the multicast control information is transmitted by the application server of the group communication service through the terminal according to the request message. The service node device is sent to the terminal, specifically: The terminal receives the multicast control information sent by the serving base station of the terminal, and the multicast control information is obtained by the application server of the group communication service sending an instruction message to the service mobility management entity of the terminal. , the instruction message is used to be sent by the serving mobility management entity to the serving base station and instruct the serving base station to send the multicast control information to the terminal. 17. The method of claim 13 or 14, wherein the terminal receives indication information containing identification information indicating the MBMS bearer sent by the application server of the group communication service, and obtains the information related to the MBMS bearer according to the indication information. The multicast control information corresponding to the identification information specifically includes: the terminal receives the multimedia multicast area identifier of the cell where the terminal is located from the application server of the group communication service, and the multimedia multicast area identifier is determined by the The application server of the group communication service sends an instruction message to the serving mobility management entity of the terminal to obtain the multimedia multicast area. The instruction message is used to instruct the serving mobility management entity to obtain the multimedia multicast area from the multi-cell coordination entity of the terminal. Identify and return the multimedia multicast area identification to the application service of the group communication service. The terminal sends the multimedia multicast area identifier to the terminal's serving base station; the terminal receives the multicast control information obtained and returned by the serving base station according to the multimedia multicast area identifier. 18. The method of claim 13 or 14, wherein the terminal receives indication information containing identification information indicating the MBMS bearer sent by the application server of the group communication service, and obtains the information related to the MBMS bearer according to the indication information. The multicast control information corresponding to the identification information specifically includes: the terminal receives the temporary mobility group identification code or the multimedia broadcast multicast session identification of the terminal from the application server of the group communication service, the temporary mobility group Identifier or Multimedia Broadcast Multicast The session identifier is obtained by the application server of the group communication service from the request message sent by the terminal to request group membership; The terminal requests the terminal's serving base station to obtain multicast control information corresponding to the temporary mobility group identification code or the multimedia broadcast multicast session identification; The terminal receives the multicast control information corresponding to the temporary mobile group identification code or the multimedia broadcast multicast session identification sent by the serving base station of the terminal. 19. A device for transmitting messages, characterized by including: The receiving module is used to receive the request message sent by the terminal requesting to join the group; A sending module, connected to the receiving module, configured to, after the receiving module receives the request message, send multicast control to the terminal through itself or through a service node device of the terminal according to the request message. information, or, sending instruction information including identification information indicating the multimedia broadcast multicast service MBMS bearer to the terminal, where the instruction information is used to instruct the terminal to obtain the multicast control information corresponding to the identification information; The multicast control information is used to enable the terminal to obtain group communication data. 20. The device according to claim 19, wherein the multicast control information is specifically: MBMS bearer information for the terminal to join the group. 21. The device according to claim 19 or 20, wherein the sending module is specifically configured to: send a request message to the serving mobility management entity of the terminal, and the request message is used to request acquisition of the group Request message to broadcast control information; The receiving module is further configured to: after the sending module sends the request message, receive the multicast that the serving mobility management entity of the terminal instructs the serving base station or the multi-cell coordination entity of the terminal to obtain and return. control information; The sending module is also configured to: send the multicast control information to the terminal. 22. The device according to claim 19 or 20, characterized in that the sending module is specifically used for: Send an instruction message to the serving mobility management entity of the terminal, where the instruction message is used to instruct the serving mobility management entity of the terminal to trigger the serving base station of the terminal to send the Multicast control information. 23. The device according to claim 19 or 20, wherein the sending module is further configured to: send a request message to a serving mobility management entity of the terminal, the request message being used to request acquisition of the terminal The multimedia multicast area identifier of the cell where it is located; The receiving module is further configured to: after the receiving module sends the request message, receive the multimedia multicast area identifier obtained and returned by the serving mobility management entity from the multi-cell coordination entity of the terminal; The sending module is further configured to: send instruction information including a multimedia multicast area identifier to the terminal, where the instruction information is used to cause the terminal to request from the serving base station the information corresponding to the multimedia multicast area identifier. of the multicast control information. 24. The device according to claim 19, further comprising: a determining module, connected to the sending module, configured to determine the terminal identification of the terminal through the request message; The sending module is further configured to: after the determining module determines the terminal identification, send multicast control information to the terminal through itself or through a service node device of the terminal according to the terminal identification, or , sending instruction information including identification information indicating the MBMS bearer to the terminal, where the instruction information is used to instruct the terminal to obtain the multicast control information corresponding to the identification information. 25. The device according to claim 19, further comprising: a determining module, connected to the sending module, configured to determine the temporary mobile group identification code or multimedia broadcast multiplexing code of the terminal from the request message. Broadcast session ID; The sending module is further configured to: after the determining module determines the temporary mobility group identification code or the multimedia broadcast multicast session identification, send a message containing the temporary mobility group identification code or the multimedia broadcast multicast session identification code to the terminal. The request information of the session identifier, the instruction information is used to instruct the terminal to request the terminal's serving base station to obtain the multicast corresponding to the temporary mobile group identifier or the multimedia broadcast multicast session identifier. control information. 26. A message transmission device, characterized in that it includes: Receiving module, used to receive control messages; A sending module, connected to the receiving module, configured to, after the receiving module receives the control message, send the multicast control information to the terminal or send the multicast control information to the application server of the group communication service based on the control message. Multicast control information, the application server of the group communication service is used to forward the multicast control information to the terminal, and the multicast control information is used to enable the terminal to obtain group communication data. 27. The device according to claim 26, wherein the multicast control information is specifically: multimedia broadcast multicast service MBMS bearer information of the group to which the terminal joins. 28. The device according to claim 26 or 27, wherein the receiving module is specifically configured to: receive a request message sent by the terminal containing identification information indicating an MBMS bearer, and the request message is used to: Request to obtain the multicast control information corresponding to the identification information. 29. The device according to claim 28, wherein the identification information is specifically: the multimedia multicast area identification of the cell where the terminal is located or the temporary mobility group identification code of the terminal or the cell where the terminal is located. Multimedia broadcast multicast session identifier; The sending module is specifically configured to: send multicast control information corresponding to the multimedia multicast area identifier or the temporary mobility group identifier or the multimedia broadcast multicast session identifier to the terminal. 30. The device according to claim 26 or 27, wherein the receiving module is specifically configured to: receive indication information sent by the serving mobility management entity of the terminal, the indication information being provided by the group communication service The application server sends it to the serving mobility management entity, and is used to instruct the sending module to send the multicast control information to the terminal; or The receiving module is specifically configured to: receive indication information sent by the service mobility management entity of the terminal, the indication information is sent to the service mobility management entity by the application server of the group communication service, and is used to indicate the The sending module sends the multicast control information to the application server of the group communication service. 31. A device for obtaining messages, characterized by including: A sending module, configured to send a request message requesting group membership to the application server of the group communication service; a receiving module, connected to the sending module, used to send the request message in the sending module After receiving the message, receive multicast control information, which is sent by the application server of the group communication service to the terminal through itself or the service node device of the terminal according to the request message; or, the terminal Receive indication information including identification information indicating the MBMS bearer sent by the application server of the group communication service, and obtain the multicast control information corresponding to the identification information according to the indication information; the multicast control information is used to The terminal is caused to obtain group communication data. 32. The device according to claim 31, wherein the multicast control information is specifically: multimedia broadcast multicast service MBMS bearer information of the group to which the terminal joins. 33. The device according to claim 31 or 32, characterized in that the receiving module is specifically used for: Receive the multicast control message sent by the application server of the group communication service, the multicast control message being obtained by the application server of the group communication service by sending an instruction message to the service mobility management entity of the terminal , the instruction message is used to be sent by the serving mobility management entity to the serving base station or the multi-cell coordination entity of the terminal and instructs the serving base station or the multi-cell coordination entity to send to the application server of the group communication service The multicast control information. 34. The device according to claim 31 or 32, characterized in that the receiving module is specifically used for: Receive the multicast control information sent by the serving base station of the terminal, the multicast control information is obtained by the application server of the group communication service sending an instruction message to the service mobility management entity of the terminal, The instruction message is used to be sent by the serving mobility management entity to the serving base station and instruct the serving base station to send the multicast control information to the terminal. 35. The device according to claim 31 or 32, wherein the receiving module is further configured to: receive the multimedia multicast area identifier of the cell where the terminal is located from the application server of the group communication service, The multimedia multicast area identifier is obtained by the application server of the group communication service sending an instruction message to the serving mobility management entity of the terminal. The instruction message is used to instruct the serving mobility management entity to coordinate from the multi-cell coordination of the terminal. The entity obtains the multimedia multicast area identifier and returns the multimedia multicast area identifier to the application server of the group communication service; The sending module is also configured to: receive the multimedia multicast area identifier in the receiving module After that, send the multimedia multicast area identifier to the serving base station of the terminal; the receiving module is also configured to: after the sending module sends the multimedia multicast area identifier, receive the service base station according to the The multicast control information obtained and returned by the multimedia multicast area identifier. 36. The device according to claim 31 or 32, wherein the receiving module is further configured to: receive the temporary mobile group identification code or multimedia broadcast multicast of the terminal from the application server of the group communication service Session identification, the temporary mobile group identification code or the multimedia broadcast multicast session identification is obtained by the application server of the group communication service from the request message sent by the terminal to request group membership; The sending module is further configured to: after the receiving module receives the temporary mobility group identification code or the multimedia broadcast multicast session identification, request the serving base station of the terminal to obtain the temporary mobility group identification code or the multimedia multicast session identification code. Multicast control information corresponding to the broadcast multicast session identifier; The receiving module is further configured to: after the sending module sends the temporary mobility group identification code or the multimedia broadcast multicast session identification, receive the temporary mobility group identification code or multimedia broadcast multicast session identification sent by the serving base station of the terminal. Multicast control information corresponding to the multimedia broadcast multicast session identifier. 37. An application server for group communication services, characterized by including: Data transmission interface, used to receive request messages sent by the terminal requesting group membership; A processor, connected to the data transmission interface, configured to send multicast control information to the terminal through the data transmission interface or through a service node device of the terminal according to the request message, or to send a message containing Instruction information indicating the identification information carried by the multimedia broadcast multicast service MBMS, the instruction information is used to instruct the terminal to obtain the multicast control information corresponding to the identification information; the multicast control information is used to enable the The terminal obtains group communication data. 38. The application server for group communication services according to claim 37, wherein the multicast control information is specifically: MBMS bearer information for the terminal to join the group. 39. The application server of group communication service according to claim 37 or 38, characterized in that, the processor is further configured to: send a request message to the service mobility management entity of the terminal through the data transmission interface, The request message is a request message used to request acquisition of the multicast control information; and receiving, through the data transmission interface, the multicast control information obtained and returned by the serving mobility management entity of the terminal instructing the serving base station or multi-cell coordination entity of the terminal; 40. The application server of group communication service according to claim 37 or 38, characterized in that the processor sends multicast control information to the terminal through the service node device of the terminal, specifically including: The processor sends an instruction message to the serving mobility management entity of the terminal through the data transmission interface. The instruction message is used to instruct the serving mobility management entity of the terminal to trigger the serving base station of the terminal to send the message to the terminal. The multicast control information. 41. The application server of group communication service according to claim 37 or 38, characterized in that, the processor is further configured to: send a request message to the service mobility management entity of the terminal through the data transmission interface, The request message is used to request to obtain the multimedia multicast area identifier of the cell where the terminal is located, and to receive the service mobility management entity obtained and returned from the multi-cell coordination entity of the terminal through the data transmission interface. Multimedia multicast area identification; The processor sends instruction information containing identification information indicating the MBMS bearer to the terminal, where the instruction information is used to instruct the terminal to obtain the multicast control information corresponding to the identification information, specifically: The processor sends the multimedia multicast area identifier to the terminal through the data transmission interface, and the multimedia multicast area identifier is used to cause the terminal to request the multicast control information from the serving base station. 42. The application server for group communication services according to claim 37, wherein the processor is further configured to: determine the terminal identification of the terminal through the request message; the processor , according to the request message, send multicast control information to the terminal through the data transmission interface or through the service node device of the terminal, or, the application server of the group communication service sends to the terminal a message containing an indication of MBMS bearer Instruction information of identification information, the instruction information is used to instruct the terminal to obtain the multicast control information corresponding to the identification information, specifically: The processor performs the data transmission according to the terminal identification and the request message. The interface or the service node device of the terminal sends multicast control information to the terminal, or the application server of the group communication service sends indication information containing identification information indicating the MBMS bearer to the terminal, and the indication information is used to Instruct the terminal to obtain the multicast control information corresponding to the identification information. 43. The application server of group communication service according to claim 37, characterized in that the processor is also used to: The processor determines the temporary mobility group identification code or the multimedia broadcast multicast session identification of the terminal from the request message; The processor sends instruction information including identification information indicating the MBMS bearer to the terminal, where the instruction information is used to instruct the terminal to obtain the multicast control information corresponding to the identification information, specifically: the processing The device sends the temporary mobility group identification code or the multimedia broadcast multicast session identification to the terminal through the data transmission interface, and the temporary mobility group identification code or the multimedia broadcast multicast session identification is used for the The terminal requests the terminal's serving base station to obtain the multicast control information. 44. A base station, characterized by: including: Data transmission interface, used to receive control messages; A processor, connected to the data transmission interface, configured to send multicast control information to the terminal or to an application server of group communication services based on the control message after the data transmission interface receives the control information. To send the multicast control information, the application server of the group communication service is used to forward the multicast control information to the terminal, and the multicast control information is used to enable the terminal to obtain group communication data. 45. The base station according to claim 44, wherein the multicast control information is specifically: multimedia broadcast multicast service MBMS bearer information of the group to which the terminal joins. 46. The base station according to claim 44 or 45, wherein the data transmission interface is specifically configured to: receive a request message sent by the terminal containing identification information indicating an MBMS bearer, and the request message is Requesting to obtain the multicast control information corresponding to the identification information. 47. The base station according to claim 46, wherein the identification information is: The multimedia multicast area identification of the cell where the terminal is located or the temporary mobility group identification code of the terminal or the multimedia broadcast multicast session identification of the cell where the terminal is located; The processor sends multicast control information to the terminal through the data transmission interface based on the control message, specifically: the processor sends the multimedia multicast control information to the terminal through the data transmission interface The multicast control information corresponding to the area identifier or the temporary mobile group identifier or the multimedia broadcast multicast session identifier. 48. The base station according to claim 44 or 45, characterized in that the data transmission interface is specifically used to: receive indication information sent by the serving mobility management entity of the terminal, the indication information being provided by a group communication service The application server is sent to the serving mobility management entity, and is used to instruct the data transmission interface to send the multicast control information to the terminal; or The data transmission interface is specifically used to: receive instruction information sent by the service mobility management entity of the terminal, the instruction information is sent to the service mobility management entity by the application server of the group communication service, and is used to indicate the service mobility management entity. The data transmission interface sends the multicast control information to the application server of the group communication service. 49. A terminal, characterized in that it includes: Processor and data transfer interface; The processor is configured to, after determining the request information requesting group membership, send a request message requesting group membership to the application server of the group communication service through the data transmission interface; The data transmission interface is used to: receive indication information returned by the application server of the group communication service according to the request message, including indication information indicating the identification information carried by the multimedia broadcast multicast service MBMS; The processor is further configured to: based on the indication information, obtain the multicast control information corresponding to the identification information from the serving base station of the terminal through the data transmission interface, where the multicast control information is To enable the terminal to obtain group communication data; The data transmission interface is also used to: receive multicast control information. 50. The terminal according to claim 49, wherein the multicast control information is specifically: MBMS bearer information of the group to which the terminal joins. 51. The terminal according to claim 49 or 50, wherein the data transmission interface receives indication information including identification information indicating the MBMS bearer returned by the application server of the group communication service according to the request message, specifically: The data transmission interface receives the multimedia multicast area identifier of the cell where the terminal is located from the application server of the group communication service, and the multimedia multicast area identifier is moved from the application server of the group communication service to the service of the terminal The management entity obtains the information by sending an instruction message. The instruction message is used to instruct the serving mobility management entity to obtain the multimedia multicast area identifier from the multi-cell coordination entity of the terminal and return the multimedia multicast area identifier to the terminal. Application server for group communication services; Based on the indication information, the processor obtains the multicast control information corresponding to the identification information from the serving base station of the terminal through the data transmission interface, specifically: The processor requests the serving base station of the terminal to obtain multicast control information corresponding to the multimedia multicast area identifier through the data transmission interface. 52. The terminal according to claim 49 or 50, wherein the data transmission interface receives indication information including identification information indicating the MBMS bearer returned by the application server of the group communication service according to the request message, specifically: The data transmission interface receives the temporary mobile group identification code or multimedia broadcast multicast session identification of the terminal from the application server of the group communication service, and the temporary mobile group identification code or multimedia broadcast multicast session identification is obtained by the group communication service. The application server of the communication service obtains it from the request message sent by the terminal requesting group membership; Based on the indication information, the processor obtains the multicast control information corresponding to the identification information from the serving base station of the terminal through the data transmission interface, specifically: The processor requests the serving base station of the terminal to obtain multicast control information corresponding to the temporary mobile group identification code or the multimedia broadcast multicast session identification through the data transmission interface.