CN104618349B

CN104618349B - A kind of trunked communication system, server and communication means

Info

Publication number: CN104618349B
Application number: CN201510016227.XA
Authority: CN
Inventors: 董颖; 李海月; 刘绍峰; 李靖; 杨艳梅
Original assignee: Shanghai Huawei Technologies Co Ltd
Current assignee: Shanghai Huawei Technologies Co Ltd
Priority date: 2015-01-13
Filing date: 2015-01-13
Publication date: 2018-09-11
Anticipated expiration: 2035-01-13
Also published as: WO2016112671A1; CN104618349A

Abstract

The embodiment of the invention discloses a kind of trunked communication system, server and communication means.Trunked communication system includes in the embodiment of the present invention：Cluster application server, home subscriber server, signaling access and Interworking gateway, group management function module, media resource processing module；Cluster application server is used to receive the call request of the first user terminal of signaling access and Interworking gateway forwarding, and after determining that call request is group-calling service, query messages are sent to group management function module；Group management function module is used to inquire corresponding group information according to query messages；Cluster application server is additionally operable to after receiving the return message of group information, indicate that media resource processing module is other group members foundation carrying in the first user terminal and group information, and other group members into group information initiate session establishment request.The embodiment of the present invention carries out logic entity division and system deployment to MCPTT frameworks, in favor of cluster time delay optimization.

Description

A kind of trunked communication system, server and communication means

Technical field

The present invention relates to field of communication technology, more particularly to a kind of trunked communication system, server and communication means.

Background technology

Demand with people to broadband business, such as video calling, picture, cluster communication is to broadband direction Evolution.LTE (Long Term Evolution, long term evolution) is state-of-the-art mobile broadband system now, so being based on LTE Broadband cluster become the direction of future development, therefore in order to meet the needs of broadband cluster, it is necessary to support SIP (Session Initiation Protocol, session initiation protocol).

PoC (Push to Talk over Cellular, the push to talk function based on public cellular net) is public cellular PTT (Push to Talk, push to speak) business in mobile communications network.PTT is also known as " push to talk ", is derived from cluster communication skill Art.PTT realizes the mobile voice service of Walkie-Talkie (walkie-talkie), has call set-up time short, and speech just occupies Channel, answers a monitor channel, and recipient can receive call information at any time without off-hook.PoC is a kind of two-way, instant and more The mode of Fang Tongxin allows to communicate between two or more users.PoC service is similar to mobile intercommunication business, i.e. user key-press All participants there of a group is conversed or is broadcast to other users.In PoC system architectures, by being based on IMS (IP Multimedia Subsystem, IP multimedia subsystem) network deployment SIP carry out network signal control.

MCPTT (close by Mission Critical Push To Talk over LTE, the push to talk function based on LTE nets Key task) define the realization standard of the lower push-to-talk function business of LTE network.Patrolling for the MCPTT frameworks in the prior art It collects functional entity not divided, does not also illustrate the specific deployment scheme of the MCPTT frameworks；And it is based on IMS above-mentioned The SIP of network deployment is carried out in the framework of network signal control, and network element is more, and framework is complicated.

Invention content

The present invention provides a kind of trunked communication system, server and communication means, and logic entity is carried out to MCPTT frameworks Division and system deployment, in favor of cluster time delay optimization.

First aspect present invention provides a kind of trunked communication system, including：

Cluster application server, home subscriber server, signaling access and Interworking gateway, group management function module, matchmaker Body resource processing module；

The signaling access and Interworking gateway are used to receive the call request of the first user terminal transmission, the call request In carry the identification information of class of service；

The cluster application server is used to receive the call request of the signaling access and Interworking gateway forwarding, and After determining that the call request is group-calling service according to the identification information of the class of service, to the group management function mould Block sends query messages, and group identification is carried in the query messages；

The group management function module is used to receive the query messages that the cluster application server is sent, and root Group information corresponding with the group identification is inquired from database according to the query messages, the group information includes group Member identities' identification list and/or group's zone list；

The cluster application server is additionally operable to receiving the group information of the group management function module transmission After returning to message, instruction message is sent to the media resource processing module；The instruction message is used to indicate the media money Source processing module is that other group members in first user terminal and group information establish carrying；

The cluster application server is additionally operable in the media resource processing module be first user terminal and institute After stating other group members foundation carrying in group information, other group members into the group information are initiated session and are built Vertical request, so that first user terminal establishes session with other group members in the group information.

In conjunction with the first aspect of the present invention, in the first realization method of first aspect present invention,

The signaling access and Interworking gateway are additionally operable to receive the registration message that first user terminal is sent, the note The address of home domain when first user terminal is opened an account is carried in volume message；

The cluster application server is additionally operable in the registration for receiving the signaling access and Interworking gateway transmission After message, the signing information of first user terminal is obtained from the home subscriber server, and to first user Terminal is registered.

In conjunction with the first aspect of the present invention, in second of realization method of first aspect present invention, the signaling access It is additionally operable to receive the registration message of the first user terminal transmission with Interworking gateway, and is returned from described according to the registration message Belong to the signing information for obtaining first user terminal in client server, and is believed according to the signing of first user terminal Breath registers first user terminal；Ownership when first user terminal is opened an account is carried in the registration message The address in domain；

The cluster application server is additionally operable in the notice registration for receiving the signaling access and Interworking gateway transmission After message, the signing information of first user terminal is obtained from the home subscriber server.

Second in conjunction with the first of the first aspect of the present invention or first aspect realization method or first aspect is real Existing mode, in the third realization method of first aspect present invention, the trunked communication system by the media resource at Manage the communication that module carries out media plane with evolved packet system EPS, and by signaling access and Interworking gateway with it is described Evolved packet system EPS carries out the communication of signaling plane.

Second in conjunction with the first of the first aspect of the present invention or first aspect realization method or first aspect is real Existing mode, in the 4th kind of realization method of first aspect present invention, the quantity of the trunked communication system is at least two, respectively Cell in a trunked communication system control setting range；Wherein, pass through respective institute between each trunked communication system The communication that media resource processing module carries out media plane is stated, and letter is carried out by the respective signaling access and Interworking gateway Enable the communication of plane.

In conjunction with the 4th kind of realization method of first aspect present invention, in the 5th kind of realization method of first aspect present invention In, roaming communication is carried out by IP multimedia subsystem between each trunked communication system, wherein each cluster is logical Media resource processing module in letter system carries out the communication of media plane, each cluster with the IP multimedia subsystem Signaling access and Interworking gateway in communication system carry out the communication of signaling plane with the IP multimedia subsystem.

In conjunction with the 5th kind of realization method of first aspect present invention, in the 6th kind of realization method of first aspect present invention In, the signaling access and Interworking gateway are specifically used for receiving first user terminal of the IP multimedia subsystem forwarding The registration message of transmission, and the registration message is sent to the cluster application server.

In conjunction with the 5th kind of realization method of first aspect present invention, in the 7th kind of realization method of first aspect present invention In, the signaling access and Interworking gateway are specifically used for receiving first user terminal of the IP multimedia subsystem forwarding The call request of transmission.

Second in conjunction with the first of the first aspect of the present invention or first aspect realization method or first aspect is real Existing mode, in the 8th kind of realization method of first aspect present invention, the signaling access and Interworking gateway are additionally operable to receive institute State the session establishment request that other group members into the group information of cluster application server are initiated, and by the session Other group members that request is transmitted in the group information are established, so that first user terminal and the group information In other group members establish session.

Second aspect of the present invention provides a kind of cluster application server, including：

Receiving unit, the call request of the first user terminal for receiving signaling access and Interworking gateway forwarding are described The identification information of class of service is carried in call request；

First transmission unit, for determining that the call request is that group exhales industry according to the identification information of the class of service After business, the query messages for carrying group identification are sent to group management function module, so that the group management function module Group information corresponding with the group identification is inquired from database according to the query messages；The group information includes group Group member identity identification list and/or group's zone list；

Second transmission unit, in the return message for receiving the group information that the group management function module is sent Afterwards, instruction message is sent to media resource processing module；The instruction message is used to indicate the media resource processing module Other group members in first user terminal and group information establish carrying；

Processing unit, used in being first user terminal and the group information in the media resource processing module Other group members establish carrying after, other group members into the group information initiate session establishment request so that First user terminal establishes session with other group members in the group information.

In conjunction with the second aspect of the present invention, in the first realization method of second aspect of the present invention, the server is also Including：

Acquiring unit, for the note in first user terminal for receiving the signaling access and Interworking gateway transmission After volume message, the signing information of first user terminal is obtained from home subscriber server；It is carried in the registration message The address of home domain when thering is first user terminal to open an account；

Registering unit, for after the signing information that the acquiring unit obtains first user terminal, to described One user terminal is registered.

In conjunction with the second aspect of the present invention, in second of realization method of second aspect of the present invention, the server is also Including：

Acquiring unit, for after receiving signaling access and notice registration message that Interworking gateway is sent, from returning Belong to the signing information that first user terminal is obtained in client server；The notice registration message be the signaling access and The notification message that Interworking gateway is sent after being registered to first user terminal.

Second in conjunction with the first of the second aspect of the present invention or second aspect realization method or second aspect is real Existing mode, in the third realization method of second aspect of the present invention, the processing unit is specifically used in the media resource Processing module is after other group members in first user terminal and the group information establish carrying, to the signaling Access and Interworking gateway send session establishment request, and are asked the session establishment by signaling access and Interworking gateway Other group members being transmitted in the group information, so that other in first user terminal and the group information Group member establishes session.

Third aspect present invention provides a kind of cluster communication method, including：

Cluster application server receives the call request of the first user terminal of signaling access and Interworking gateway forwarding, described The identification information of class of service is carried in call request；

Determine that the call request is exhaled for group according to the identification information of the class of service in the cluster application server After business, the cluster application server sends the query messages for carrying group identification to group management function module, so that The group management function module inquires group's letter corresponding with the group identification according to the query messages from database Breath；The group information includes group member identity's identification list and/or group's zone list；

The cluster application server disappears in the return for receiving the group information that the group management function module is sent After breath, instruction message is sent to media resource processing module；The instruction message is used to indicate the media resource processing module Carrying is established for other group members in first user terminal and group information；

Other groups composition in the media resource processing module is first user terminal and the group information After member establishes carrying, other group members of the cluster application server into the group information, which initiate session establishment, asks It asks, so that first user terminal establishes session with other group members in the group information.

In conjunction with the third aspect of the present invention, in the first realization method of third aspect present invention, the cluster application Server receives signaling access and the call request of Interworking gateway forwarding includes before：

The cluster application server is whole in first user for receiving the signaling access and Interworking gateway transmission After the registration message at end, the signing information of first user terminal is obtained from home subscriber server；The registration message In carry the address of home domain when first user terminal is opened an account；

The cluster application server is after the signing information for obtaining first user terminal, to first user end It is registered at end.

In conjunction with the third aspect of the present invention, in second of realization method of second aspect of the present invention, the cluster application Server receives signaling access and the call request of Interworking gateway forwarding includes before：

The cluster application server after receiving signaling access and notice registration message that Interworking gateway is sent, The signing information of first user terminal is obtained from home subscriber server；The notice registration message is that the signaling connects Enter the notification message sent after being registered to first user terminal with Interworking gateway.

Second in conjunction with the first of the third aspect of the present invention or the third aspect realization method or the third aspect is real Existing mode, in the third realization method of third aspect present invention, the cluster application server is into the group information Other group members initiate session establishment request specifically include：

The cluster application server sends session establishment request to signaling access and Interworking gateway, and by described Signaling accesses and session establishment request is transmitted to other group members in the group information by Interworking gateway, so that institute It states the first user terminal and establishes session with other group members in the group information.

As can be seen from the above technical solutions, the embodiment of the present invention has the following advantages：The cluster application server is used In the call request for receiving the signaling access and Interworking gateway forwarding, and in the identification information according to the class of service The call request is determined as after group-calling service, query messages are sent to the group management function module；The cluster application Server is additionally operable to after the return message for receiving the group information that the group management function module is sent, to the media Resource processing module sends instruction message, so that the media resource processing module is first user terminal and group information In other group members establish carrying；And the media resource processing module be first user terminal and the group After other group members in information establish carrying, other group members into the group information, which initiate session establishment, asks It asks, so that first user terminal establishes session with other group members in the group information.Therefore, pass through above-mentioned collection The specific deployment scheme of group communication system reduces the network element entity in the existing cluster communication network architecture, and logical architecture Simply, it is conducive to cluster time delay optimization.

Description of the drawings

One structural schematic diagram of the trunked communication system that Fig. 1 is provided by the embodiment of the present invention；

One network architecture schematic diagram of the trunked communication system that Fig. 2 is provided by the embodiment of the present invention；

Another network architecture schematic diagram for the trunked communication system that Fig. 3 is provided by the embodiment of the present invention；

Another network architecture schematic diagram for the trunked communication system that Fig. 4 is provided by the embodiment of the present invention；

Another network architecture schematic diagram for the trunked communication system that Fig. 5 is provided by the embodiment of the present invention；

Another network architecture schematic diagram for the trunked communication system that Fig. 6 is provided by the embodiment of the present invention；

Another network architecture schematic diagram for the trunked communication system that Fig. 7 is provided by the embodiment of the present invention；

One structural schematic diagram of the cluster application server that Fig. 8 is provided by the embodiment of the present invention；

Another structural schematic diagram for the cluster application server that Fig. 9 is provided by the embodiment of the present invention；

Another structural schematic diagram for the cluster application server that Figure 10 is provided by the embodiment of the present invention；

Another structural schematic diagram for the cluster application server that Figure 11 is provided by the embodiment of the present invention；

One flow diagram of the cluster communication method that Figure 12 is provided by the embodiment of the present invention；

Another flow diagram for the cluster communication method that Figure 13 is provided by the embodiment of the present invention；

Another flow diagram for the cluster communication method that Figure 14 is provided by the embodiment of the present invention.

Specific implementation mode

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, the every other implementation that those skilled in the art are obtained without making creative work Example, shall fall within the protection scope of the present invention.

It will be appreciated that though may be described in embodiments of the present invention using term first, second etc. each user or Terminal, but user or terminal should not necessarily be limited by these terms.These terms are only used for user or terminal being distinguished from each other out.For example, In the case where not departing from range of embodiment of the invention, the first user can also be referred to as second user, similarly, second user It can also be referred to as the first user；Likewise, second user can also be referred to as third user etc., the embodiment of the present invention is to this It is not limited.

Referring to Fig. 1, a structural schematic diagram of the trunked communication system provided by the embodiment of the present invention, the cluster is logical Letter system includes：

Cluster application server 101, home subscriber server 102, signaling access and Interworking gateway 103, management and group work( It can module 104, media resource processing module 105；

Above-mentioned signaling access and Interworking gateway 103 are used to receive the call request of the first user terminal transmission, above-mentioned calling The identification information of class of service is carried in request；

The above-mentioned calling that above-mentioned cluster application server 101 is used to receive above-mentioned signaling access and Interworking gateway 103 forwards Request, and after determining that above-mentioned call request is group-calling service according to the identification information of above-mentioned class of service, managed to above-mentioned group It manages function module 104 and sends query messages, group identification is carried in above-mentioned query messages；

The above-mentioned inquiry that above-mentioned group management function module 104 is used to receive the transmission of above-mentioned cluster application server 101 disappears Breath, and group information corresponding with above-mentioned group identification, above-mentioned group information are inquired from database according to above-mentioned query messages Including group member identity's identification list and/or group's zone list；

Above-mentioned cluster application server 101 is additionally operable in the group for receiving the above-mentioned transmission of group management function module 104 After the return message of information, instruction message is sent to above-mentioned media resource processing module 105；Above-mentioned instruction message is used to indicate It is that other group members in above-mentioned first user terminal and group information establish carrying to state media resource processing module 105；

Above-mentioned cluster application server 101 is additionally operable in above-mentioned media resource processing module 105 be that above-mentioned first user is whole After other group members in end and above-mentioned group information establish carrying, other group members into above-mentioned group information are initiated Session establishment is asked, so that above-mentioned first user terminal establishes session with other group members in above-mentioned group information.

In the embodiment of the present invention, above-mentioned cluster application server 101 is for receiving above-mentioned signaling access and Interworking gateway 103 The above-mentioned call request of forwarding, and determining that above-mentioned call request is group-calling service according to the identification information of above-mentioned class of service Afterwards, query messages are sent to above-mentioned group management function module 104；Above-mentioned cluster application server 101 is additionally operable to receiving After the return message for the group information that above-mentioned group management function module 104 is sent, sent out to above-mentioned media resource processing module 105 Instruction message is sent, so that above-mentioned media resource processing module 105 is other groups in above-mentioned first user terminal and group information Group membership establishes carrying；And in above-mentioned media resource processing module 105 is above-mentioned first user terminal and above-mentioned group information Other group members establish carrying after, other group members into above-mentioned group information initiate session establishment request so that Above-mentioned first user terminal establishes session with other group members in above-mentioned group information.Therefore, pass through above-mentioned cluster communication The specific deployment scheme of system reduces the network element entity in the existing cluster communication network architecture, and logical architecture is simple, profit In cluster time delay optimization.

Optionally, above-mentioned signaling access and Interworking gateway 103 are additionally operable to receive the registration that above-mentioned first user terminal is sent Message carries the address of home domain when above-mentioned first user terminal is opened an account in above-mentioned registration message；

Above-mentioned cluster application server 101 be additionally operable to receive the access of above-mentioned signaling and Interworking gateway 103 send it is upper After stating registration message, the signing information of above-mentioned first user terminal is obtained from above-mentioned home subscriber server 102, and to above-mentioned First user terminal is registered.

Optionally, above-mentioned signaling access and Interworking gateway 103 are additionally operable to receive the registration that above-mentioned first user terminal is sent Message, and the signing letter of above-mentioned first user terminal is obtained according to above-mentioned registration message from above-mentioned home subscriber server 102 Breath, and above-mentioned first user terminal is registered according to the signing information of above-mentioned first user terminal；Above-mentioned registration message In carry the address of home domain when above-mentioned first user terminal is opened an account；

Above-mentioned cluster application server 101 be additionally operable to receive the access of above-mentioned signaling and Interworking gateway 103 send it is logical After knowing registration message, the signing information of above-mentioned first user terminal is obtained from above-mentioned home subscriber server 102.

Optionally, above-mentioned trunked communication system by above-mentioned media resource processing module 105 and evolved packet system EPS into The communication of row media plane, and signaling is carried out by the access of above-mentioned signaling and Interworking gateway 103 and above-mentioned evolved packet system EPS The communication of plane.

Optionally, the quantity of above-mentioned trunked communication system is at least two, and each trunked communication system controls setting range Interior cell；Wherein, matchmaker is carried out by respective above-mentioned media resource processing module 105 between above-mentioned each trunked communication system The communication of body plane, and pass through the communication of respective above-mentioned signaling access and the progress signaling plane of Interworking gateway 103.

For example, under the network interworking between trunked communication system A and trunked communication system B, including trunked communication system A User roams under trunked communication system B, session intercommunication etc. between trunked communication system A and trunked communication system B, by each From media resource processing module 105 carry out media plane communication, and by respective signaling access and Interworking gateway 103 into The communication of row signaling plane.

Optionally, roaming communication is carried out by IP multimedia subsystem between above-mentioned each trunked communication system, wherein on The media resource processing module 105 stated in each trunked communication system carries out the logical of media plane with above-mentioned IP multimedia subsystem Believe, the signaling access and Interworking gateway 103 in above-mentioned each trunked communication system carry out signaling with above-mentioned IP multimedia subsystem The communication of plane.

For example, the network interworking between trunked communication system A and trunked communication system B, but therebetween without direct Access.User under trunked communication system A roams under trunked communication system B networks, and trunked communication system A and cluster communication There is no direct path between system B networks.And have access between trunked communication system B and IP multimedia subsystem, cluster communication There is access between system A and IP multimedia subsystem, then can be used as transfer network by IP multimedia subsystem network；Or it is straight It connects and roams under IP multimedia system networks, matchmaker is carried out by media resource processing module 105 and above-mentioned IP multimedia subsystem The communication of body plane carries out the communication of signaling plane by signaling access and Interworking gateway 103 with above-mentioned IP multimedia subsystem.

Optionally, above-mentioned signaling access and Interworking gateway 103 are specifically used for receiving above-mentioned IP multimedia subsystem forwarding The registration message that above-mentioned first user terminal is sent, and above-mentioned registration message is sent to above-mentioned cluster application server 101.

Optionally, above-mentioned signaling access and Interworking gateway 103 are specifically used for receiving above-mentioned IP multimedia subsystem forwarding The call request that above-mentioned first user terminal is sent.

Optionally, the access of above-mentioned signaling and Interworking gateway 103 are additionally operable to receive above-mentioned cluster application server 101 to above-mentioned The session establishment request that other group members in the corresponding group information of first user terminal are initiated；And by above-mentioned session establishment Request is transmitted to other group members in above-mentioned group information, so that in above-mentioned first user terminal and above-mentioned group information Other group members establish session.

Based on the trunked communication system in above-described embodiment, in conjunction with Fig. 2 to the trunked communication system in practical application field System architecture in scape carries out related description.

As shown in Fig. 2, each function module in diagram is defined first, wherein：

MCPTT Application Server are the cluster application server in the present invention, and concrete function is as follows：

Registering functional and authentication management, wherein registering functional include：User's registration (being divided into initial registration and refresh registration), User log off, kick out and time-out are nullified；

Session management, for MCPTT business, no matter group is exhaled or individual call, which is all, to be carried out in MCPTT Server Processing；

QoS (Quality of Service, service quality) ensures that providing Qos to PTT service ensures.Because signaling connects Enter the attribute due to not understanding MCPTT user and group with Interworking gateway, can not undertake in the QoS and two priority classes of MCPTT Heart role.MCPTT Application Server can perceive static state and the dynamic attribute variation of user (UE) and group constantly, The role of MCPTT priority and QoS control centres is also taken on simultaneously, and Rx interface is towards MCPTT Application Server The function of more meeting MCPTT frameworks divides；

MRFC (Multimedia Resource Function Controller, media resource function controller) is provided Function, control Media Processing Function carry out media handling.MCPTT Application Server with It is Mc interface between Media Processing Function；

The advantage of doing so is that medium surface is completely separated with control plane, Media Processing Function are only born The processing of medium surface is blamed, all instructions is issued by MCPTT Application Server.

MCPTT_HSS (MCPTT Home Subscriber Server) is the home subscriber server in the present invention, tool Body function is as follows：

It is similar with HSS (Home Subscriber Server, home subscriber server), it is the label for preserving MCPTT user About information, including basic identification, location information etc. concentrate integrated database；Main storage information includes MCPTT user identifiers (packet Include public and privately owned mark), number and address information；MCPTT user security contexts：The key of user network access authentication is believed Breath；MCPTT_HSS supports the registration of MCPTT user, and stores the location information of MCPTT user；

Store the information, such as IMEI, IMSI etc. of UE.

Group Management Function are the group management function module in the present invention, are responsible for group information Storage, management.

Media Processing Function are the media resource processing module in the present invention, and concrete function is as follows：

The institute of MRFP (Media Resource Function Process, Media Resource Function Processor) is functional, packet It is all in the relevant function of media to include execution, such as plays media and mixed-media；

With the function of other network media face intercommunications.

SP_IGW (Signalling Proxy and Interworking GateWay) is the signaling access in the present invention And Interworking gateway, concrete function are as follows：

Access the SIP signalling routes between side and MCPTT Application Sever；

The privacy management identity for providing user hides and trust domain safety assurance；

Routing function is provided for SIP session control；

Flow-control administration；

With other network interconnection intercommunications, as other MCPTT Application systems based on SP_IGW, IMS systems, PSTN (Public Switched Telephone Network, public switched telephone network) system etc..

Wherein, SP_IGW is first tie point (in signaling plane) between MCPTT terminals and MCPTT networks, from SIP From the perspective of, SP_IGW be as an outbound/inbound sip proxy server, this illustrate it is that MCPTT terminals are sent out or All SIP requests that MCPTT terminals receive will pass through SP_IGW.SP_IGW is by SIP request and response along set direction Continue to transmit (be transmitted to MCPTT terminals or be transmitted to MCPTT networks)；From the angle of http, when SP_IGW as one it is outbound/enter It stands http proxy server, this illustrates that all HTTP requests that MCPTT terminals are sent out or MCPTT terminals receive will pass through SP_IGW.HTTP request and response are continued transmission along set direction and (are transmitted to MCPTT terminals or are transmitted to by SP_IGW MCPTT networks)；

SP_IGW includes flow-control administration function, and flow control is carried out to signaling by configuring stream interface driver；

SP_IGW is essential Interworking gateway, is responsible for the signaling plane of all external networks of connection, when MCPTT networks When needing with external network intercommunication, suitable network is selected, and complete protocol conversion, for example Session Initiation Protocol can be converted into ISUP or BICC (ISUP and BICC are the call control protocols in circuit-switched network), be responsible for 3GPP SIP signalings with IETF SIP, the H.323 intercommunication etc. between signaling.

SP_IGW is also responsible for management Media Processing Function resources, SP_IGW and Media The interface applied between Processing Function is Mc mouthfuls, H.248 agreement is.

Presence Server are state showing server, and the status information for obtaining user, concrete function is as follows：

The status information of MCPTT user's publication is received, and is stored；

Receive the subscription of MCPTT user, notification status information；

The state for receiving MCPTT user obtains request, pushes status information；

Xml (Extensible Mark-up Language, extending mark language) file, such as contacts list is managed, MCPTT group list supports following operation：It creates, modification, restore and delete.

It supports to subscribe to, and notifies MCPTT user when storage file changes；

BM-SC (Broadcast Multicast Service Center) indicates broadcast/multicast service center；

EPS (Evolved Packet System) indicates evolved packet system；

IMS Core indicate IP multimedia systems；

Wherein, it is attached by interface between each function module, interface function is described as follows：

GMF：GMF interfaces be located at MCPTT Application Server and Group Management Function it Between, for MCPTT groups exhale and individual call flow in group information transmission.

Mc：Mc interface is located between MCPTT Application Server and Media Processing Funcion, Mc is located between SP_IGW and Media Processing Funcion.The interface is for controlling Media Processing The calling of media resource and special resource on Funcion.

MCP-1：It between MCPTT Application Server and SP_IGW, is triggered for MCPTT business, and will Session is sent to MCPTT Application Server servers with the final process of finishing service logic.

Cx/Sh：Cx/Sh interfaces are located between MCPTT Application Server and MCPTT_HSS.Wherein, Cx connects Mouthful effect be：MCPTT Application Server obtained from MCPTT_HSS relevant information in relation to Roaming Authorization and Security parameter needed for MCPTT user's access authentication；The effect of Sh interface is：MCPTT Application Server from User data is obtained in MCPTT_HSS.

GS：GS interfaces are located between SP_IGW and Group Management Function, for transmitting reporting of user / exiting/is added and creates the information of group.

SS：When SS interfaces are located at two MCPTT Application network interworkings, connecing between the SP_IGW of two networks Mouthful.When for two network interworkings, by signaling from a MCPTT Application forwarded to another MCPTT Application networks.

SI：When SI interfaces are located at MCPTT Application networks with IMS network intercommunication, between SP_IGW and IBCF Interface.When for MCPTT Application networks and IMS network intercommunication, by signaling MCPTT Application forwardeds It is forwarded to MCPTT Application networks to IMS network or from IMS network.

PM：PM interfaces are located between Presence Server and MCPTT Application Server, for obtaining use Family state.

PS：PS interfaces are located between Presence Server and SP_IGW, for transmitting MCPTT UE and Presence The signaling and Presence Server of Server interactions obtain the signaling of other network user's states.

Based on the system architecture of above-mentioned trunked communication system, now to the concrete function of the trunked communication system under different scenes Make related description.

One, when user carries out business in the local network based on the system architecture, as shown in figure 3, the cluster communication system In system,

In register and authentication flow, above-mentioned SP_IGW is used to receive the registration that above-mentioned first user terminal UE_1 is sent and disappears It ceases, the address of home domain when above-mentioned first user terminal is opened an account is carried in above-mentioned registration message；

Above-mentioned MCPTT Application Server are used in the above-mentioned registration message for receiving above-mentioned SP_IGW transmissions Afterwards, the signing information of above-mentioned first user terminal is obtained from above-mentioned MCPTT_HSS, and above-mentioned first user terminal is noted Volume；

It should be noted that carrying MCPTT Application Server when UE_1 opens an account in above-mentioned registration message The address in domain；Include the authorization data and user data of above-mentioned first user terminal in above-mentioned signing information；MCPTT Application Server complete the registration of above-mentioned first user terminal.

In group exhales flow, above-mentioned SP_IGW is used to receive the call request of the first user terminal transmission, and above-mentioned calling is asked The identification information of class of service is carried in asking；

It should be noted that the home domain of first user terminal handles call business, therefore first user terminal is wanted Call request is sent to the SP_IGW of ownership MCPTT Application.

Above-mentioned call requests of the above-mentioned MCPTT Application Server for receiving above-mentioned SP_IGW forwardings, and According to the identification information of above-mentioned class of service determine above-mentioned call request be group-calling service after, to above-mentioned Group Management Function sends query messages, and group identification is carried in the query messages；

It should be noted that call request is transmitted to MCPTT Application Server into industry by above-mentioned SP_IGW Business is handled, and MCPTT Application Server carry out business diagnosis, according to the identification information of above-mentioned class of service, in determination After group-calling service, query messages are sent to above-mentioned Group Management Function, group is carried in the query messages Group mark.

Above-mentioned Group Management Function are sent for receiving above-mentioned MCPTT Application Server Above-mentioned query messages, and group information corresponding with above-mentioned group identification is inquired from database according to above-mentioned query messages, Above-mentioned group information includes group member identity's identification list and/or group's zone list；

Above-mentioned MCPTT Application Server are additionally operable to receiving above-mentioned Group Management After the return message for the group information that Function is sent, sends instruction to above-mentioned Media Processing Function and disappear Breath；It is above-mentioned first user terminal and group that above-mentioned instruction message, which is used to indicate above-mentioned Media Processing Function, Other group members in information establish carrying；

Above-mentioned SP_IGW is additionally operable to receive its into above-mentioned group information of above-mentioned MCPTT Application Server The session establishment request that his group member is initiated, and the request of above-mentioned session establishment is transmitted to other groups in above-mentioned group information Group membership, so that above-mentioned first user terminal establishes session with other group members in above-mentioned group information.

It should be noted that indicating above-mentioned Media Processing in above-mentioned MCPTT Application Server Function is above-mentioned MCPTT after other group members in above-mentioned first user terminal and above-mentioned group information establish carrying Other group members that Application Server give in above-mentioned group information initiate session, and above-mentioned SP_IGW forwards MCPTT The session establishment of Application Server is asked to other group members in above-mentioned group information, so that above-mentioned first uses Family terminal establishes session with other group members in above-mentioned group information.

Two, it when user is roamed under IMS network, need to be accessed in MCPTT Application networks by IMS network, such as Shown in Fig. 4, in the trunked communication system,

It should be noted that carrying MCPTT Application Server when UE_1 opens an account in above-mentioned registration message The address in domain；The registration message is forwarded to above-mentioned SP_IGW by IMS, which is sent to the P- in IMS by specially UE CSCF (Proxy-CSCF, Proxy Call Session Control Function), P-CSCF can learn that user is non-by information such as user identifiers User in Home Network sends a message to the IBCF in IMS for the private network user of MCPTT Application (Interconnection Border Control Function, interconnection boundary Control function) processing；IBCF is according to above-mentioned note The address in the domains MCPTT Application Server carried in volume message, above-mentioned SP_IGW is sent to by the registration message；

Include the authorization data and user data of above-mentioned first user terminal in above-mentioned signing information；MCPTT Application Server complete the registration of above-mentioned first user terminal.

It should be noted that the home domain of first user terminal handles call business, therefore first user terminal is wanted Call request is sent to the SP_IGW of ownership MCPTT Application；At this point, be also forwarded by IMS, specially this The call request is sent to P-CSCF by one user terminal, when user's registration, with having recorded the SP_IGW of IBCF and home network Location, and the address of the two network elements is placed in Route (routing) header field, P-CSCF is by Route header fields by the call request It is transmitted to IBCF；IBCF controls IBGF, and (Interconnection border gateway function interconnect borde gateway Function) establish and first user terminal between carrying；IBCF passes through the Request-URI that is carried in the call request (Uniform Resource Identifier, universal resource identifier), parses the addresses SP_IGW in the call request, The call request is transmitted to the home domain SP_IGW of above-mentioned first user terminal.

It should be noted that call request is transmitted to MCPTT Application Server into industry by above-mentioned SP_IGW Business is handled, and MCPTT Application Server carry out business diagnosis, according to the identification information of above-mentioned class of service, in determination After group-calling service, query messages are sent to above-mentioned Group Management Function, group is carried in the query messages Group mark；

Three, user's roaming communication between above-mentioned trunked communication system, i.e., under MCPTT Application_A networks User roams into MCPTT Application_B networks, as shown in figure 5, in the trunked communication system,

It should be noted that first user terminal UE_1 has had already registered with home domain, therefore when UE_1 initiation callings Carry the address (the namely address of the SP_IGW of home domain in fact) of ownership MCPTT Application.UE_1 exhales group Session establishment message is sent to the SP_IGW in visit domain, this IP address is recorded as the ground of next-hop by UE_1 after succeeding in registration Location；Visit the carrying between the Media Processing Function foundation and UE_1 in the SP_IGW control visits domain in domain；

The call request is transmitted to by the SP_IGW in visit domain by the address in the visit domain carried in the call request The SP_IGW of UE_1 home domain；

Above-mentioned MCPTT Application Server are used to receive the above-mentioned calling of the SP_IGW forwardings of above-mentioned home domain Request, and after determining that above-mentioned call request is group-calling service according to the identification information of above-mentioned class of service, to above-mentioned Group Management Function send query messages, and group identification is carried in above-mentioned query messages；

It should be noted that call request is transmitted to MCPTT Application by the SP_IGW of above-mentioned home domain Server carries out business processing, and MCPTT Application Server carry out business diagnosis, according to the mark of above-mentioned class of service Know information, after being determined as group-calling service, query messages, the inquiry are sent to above-mentioned Group Management Function Group identification is carried in message.

The SP_IGW of above-mentioned home domain is additionally operable to receive above-mentioned MCPTT Application Server to be believed to above-mentioned group The session establishment request that other group members in breath are initiated, and the request of above-mentioned session establishment is transmitted in above-mentioned group information Other group members so that other group members in above-mentioned first user terminal and above-mentioned group information establish session.

It should be noted that indicating above-mentioned Media Processing in above-mentioned MCPTT Application Server Function is above-mentioned MCPTT after other group members in above-mentioned first user terminal and above-mentioned group information establish carrying Other group members that Application Server give in above-mentioned group information initiate session, and the SP_IGW of above-mentioned home domain turns The session establishment of hair MCPTT Application Server is asked to other group members in above-mentioned group information, so that on It states the first user terminal and establishes session with other group members in above-mentioned group information.

Based on above-mentioned system architecture shown in Fig. 2, in embodiments of the present invention, SP_IGW can be used as registrar, At this point, the system architecture and above-mentioned Fig. 2 the difference is that, Signalling exchange is increased between SP_IGW and MCPTT_HSS, is connect Mouth is Cx/Sh (reference can be made to the above-mentioned function for the interface defines)；Under the system structure, for user's registration authentication with it is above-mentioned Embodiment difference, specially：

One, user registers in the local network based on the system architecture

Above-mentioned SP_IGW is used to receive the registration message that above-mentioned first user terminal is sent, and according to above-mentioned registration message from The signing information of above-mentioned first user terminal, and the signing according to above-mentioned first user terminal are obtained in above-mentioned MCPTT_HSS Information registers above-mentioned first user terminal；Returning when above-mentioned first user terminal is opened an account is carried in above-mentioned registration message Belong to the address in domain；

Above-mentioned MCPTT Application Server are used in the notice registration message for receiving above-mentioned SP_IGW transmissions Afterwards, the signing information of above-mentioned first user terminal is obtained from above-mentioned MCPTT_HSS；

It should be noted that first user terminal carries the address in the domains SP_IGW, registration message is sent to SP_IGW； SP_IGW obtains the signing information of above-mentioned first user terminal to complete the registration of first user terminal from MCPTT_HSS, Include the authorization data and user data of above-mentioned first user terminal in above-mentioned signing information；Complete registration after, SP_IGW to MCPTT Application Server send notice registration message；MCPTT Application Server receive it is above-mentioned The signing information of above-mentioned first user terminal is obtained from MCPTT_HSS to complete to lead to after the notice registration message that SP_IGW is sent Know registration.

Two, user registers in the IMS network based on the system architecture

It should be noted that IBCF is according to the MCPTT Application carried in the first user terminal registration message The registration message is sent to SP_IGW by the address in domain；SP_IGW obtains the label of above-mentioned first user terminal from MCPTT_HSS About information includes the authorization data of above-mentioned first user terminal to complete the registration of first user terminal in above-mentioned signing information And user data；After completing registration, SP_IGW sends notice registration message to MCPTT Application Server；MCPTT Application Server obtain after receiving the notice registration message that above-mentioned SP_IGW is sent from MCPTT_HSS above-mentioned The signing information of first user terminal is registered with completion notice.

It should be noted that in the system architecture, user is when carrying out group-calling service, reference can be made to above-described embodiment Fig. 2 is extremely Fig. 5 is not repeated herein, and the SP_IGW functions described in Fig. 2 are defined, and the SP_IGW is added to registering functional herein, Specifically include registering functional and authentication management, wherein registering functional include user's registration (being divided into initial registration and refresh registration), User log off and time-out are nullified；Registering functional in above-mentioned MCPTT Application Server is also varied from, specific to wrap It includes：The registration of SP_IGW notices, the cancellation of SP_IGW notices, kick out.

Based on above-mentioned system architecture shown in Fig. 2, the SP_IGW in above-described embodiment may be split into two independent functions Entity：Signalling Proxy (signaling proxy module) and Interworking GateWay (Interworking gateway module).

One, Interworking GateWay and external network are interconnected intercommunication

As shown in fig. 6, carrying out Signalling exchange by the way that interface is arranged between each module in figure, interface function can be found in above-mentioned reality Illustration 2 is applied, details are not described herein again, and the function of Signalling Proxy is as follows：

Signaling proxy, MCPTT Applications Inbound/Outbound points.

The function of Interworking GateWay is as follows：

It interconnects with narrowband systems such as P25；

With IMS network, across enterprise, across the MCPTT network interconnection intercommunications of mechanism.

When Signalling Proxy are not as registrar, when user accesses from local EPS system, reflect in registration It weighs in flow, acts on the SP_IGW in embodiment Fig. 2；Group is exhaled in flow, is acted on the SP_IGW in embodiment Fig. 2；

When Signalling Proxy are not as registrar, when user roams into IMS, in register and authentication flow In, registration message is sent to by IBCF according to the address in the domains MCPTT Application carried in user's registration message Registration message is directly sent to MCPTT by Interworking GateWay, Interworking Gateway Application Server, subsequently with the register flow path by IMS network in embodiment Fig. 4；In group exhales flow, IBCF is logical The Request-URI carried in call request is crossed, which is transmitted to the Interworking of UE-1 home domain Gateway, Interworking Gateway analyses are group-calling services, which is transmitted to MCPTT Application Server processing, if certain group member is in P25/PSTN (narrowband systems) or IMS systems, MCPTT Application Server need to indicate that Interworking GateWay go to establish the group in P25/PSTN or IMS systems It exhales member, Interworking GateWay also to indicate medium process module allocation medium resource, carries out Codec (coding and decoding) The operations such as transformation, subsequently exhale flow in embodiment Fig. 4 by the group of IMS.

When Signalling Proxy are as registrar, when user accesses from local EPS system, in register and authentication In flow, the register flow path with SP_IGW in above-described embodiment as registrar is acted on；Group is exhaled in flow, is acted on above-mentioned SP_IGW exhales flow as the group of registrar in embodiment；

When Signalling Proxy are as registrar, when user roams into IMS, in register and authentication flow, The registration message is sent to by IBCF according to the address in the domains MCPTT Application carried in user's registration message The registration message is transmitted to Signalling Proxy by Interworking GateWay, Interworking Gateway, Follow-up process with embodiment SP_IGW as registrar when pass through the register flow path of IMS network；In group exhales flow, IBCF By the Request-URI carried in call request, which is transmitted to the Interworking of UE-1 home domain Gateway, Interworking Gateway analyses are group-calling services, which is transmitted to MCPTT Application Server processing, if certain group member is in P25/PSTN or IMS systems, MCPTT Application Server needs to indicate that Interworking GateWay go to establish the group call member in P25/PSTN or IMS systems, Interworking GateWay will also indicate medium process module allocation medium resource, carry out the operations such as Codec transformation, subsequently Flow is exhaled by the group of IMS when with embodiment SP_IGW as registrar.

Two, Interworking Gateway and CS (circuit switching, circuit switching) network (such as PSTN/ Tetra (Terrestial Trunked Radio, Terrestrial trunked radio) etc.) it is interconnected intercommunication, Signalling Proxy is interconnected intercommunication with PS (packet switching, packet switch) network (such as IMS/MCPTT networks)

As shown in fig. 7, carrying out Signalling exchange by the way that interface is arranged between each module in figure, interface function can be found in above-mentioned reality Illustration 2 is applied, details are not described herein again, and the function of Signalling Proxy is as follows：

Signaling proxy, MCPTT Applications Inbound/Outbound points；

The function of Interworking GateWay is as follows：

It interconnects with narrowband systems such as P25.

When Signalling Proxy are not as registrar, when user roams into IMS, in register and authentication flow In, registration message is sent to by IBCF according to the address in the domains MCPTT Application carried in user's registration message Registration message is directly sent to MCPTT Application by Signalling Proxy, Signalling Proxy Server, subsequently with the register flow path by IMS network in embodiment Fig. 4；In group exhales flow, IBCF passes through in call request The call request is transmitted to the Signalling Proxy, Signalling of UE-1 home domain by the Request-URI of carrying Proxy analyses are group-calling services, which is transmitted to MCPTT Application Server processing, if certain group forms Member A is in P25/PSTN systems, and MCPTT Application Server need to indicate that Interworking GateWay are gone Medium process module allocation medium resource will also be indicated by establishing group member A, Interworking GateWay, carry out Codec Transformation, the medium surface established between narrowband systems Media Gateway connect；If group member B is under IMS network, MCPTT Application Server need to indicate that Signalling Proxy go to establish group member B, Signalling Proxy to want Indicate that medium process module allocation medium resource, Codec transformation establish the carrying between IBGF, subsequently in embodiment Fig. 4 Flow is exhaled by the group of IMS.

When Signalling Proxy are as registrar, when user roams into IMS, in register and authentication flow, The registration message is sent to by IBCF according to the address in the domains MCPTT Application carried in user's registration message Signalling Proxy, the registration that follow-up process passes through IMS network with SP_IGW in above-described embodiment as registrar Flow；

Group exhales whether flow is not influenced as registrar by Signalling Proxy, acts on and describes with above-mentioned reality It applies SP_IGW in example and flow is exhaled by the group of IMS network as registrar.

It, also can be according to actual conditions (such as two systems of same enterprises in two kinds of intercommunication modes of above-mentioned introduction Between intercommunication use Signalling Proxy intercommunications, Interworking GateWay are used between the MCPTT systems of different enterprises Intercommunication), above-mentioned two situations are merged, achieve the purpose that deployment.It is separated with homologous ray intercommunication and with different system intercommunication It realizes and disposes.

Associated description is carried out to the trunked communication system in the present invention above, below to the cluster provided in the present invention Application server carries out related description.

Referring to Fig. 8, a structural schematic diagram of the cluster application server provided by the embodiment of the present invention, the cluster Application server includes：

Receiving unit 801, the call request of the first user terminal for receiving signaling access and Interworking gateway forwarding, on State the identification information that class of service is carried in call request；

First transmission unit 802, for determining that above-mentioned call request is group according to the identification information of above-mentioned class of service After exhaling business, the query messages for carrying group identification are sent to group management function module, so that above-mentioned group management function Module inquires group information corresponding with above-mentioned group identification according to above-mentioned query messages from database；Above-mentioned group information packet Include group member identity's identification list and/or group's zone list；

Second transmission unit 803, in the return for receiving the group information that above-mentioned group management function module is sent After message, instruction message is sent to media resource processing module；Above-mentioned instruction message is used to indicate above-mentioned media resource processing mould Block is that other group members in above-mentioned first user terminal and group information establish carrying；

Processing unit 804, for being that above-mentioned first user terminal and above-mentioned group believe in above-mentioned media resource processing module After other group members in breath establish carrying, other group members into above-mentioned group information initiate session establishment request, So that above-mentioned first user terminal establishes session with other group members in above-mentioned group information.

In the embodiment of the present invention, above-mentioned receiving unit 801 is used to receive above-mentioned the exhaling of signaling access and Interworking gateway forwarding Cry request；Above-mentioned first transmission unit 802 according to the identification information of above-mentioned class of service for determining that above-mentioned call request is After group-calling service, query messages are sent to above-mentioned group management function module, so that above-mentioned group management function module is according to upper It states query messages and inquires group information corresponding with above-mentioned group identification from database；Above-mentioned second transmission unit 803 is used for After the return message for receiving the group information that above-mentioned group management function module is sent, sent to media resource processing module Instruction message；Above-mentioned processing unit 804 is used in above-mentioned media resource processing module be above-mentioned first user terminal and above-mentioned group After other group members in group information establish carrying, other group members into above-mentioned group information, which initiate session establishment, asks It asks, so that above-mentioned first user terminal establishes session with other group members in above-mentioned group information.Therefore, pass through above-mentioned collection The specific deployment scheme of group communication system reduces the network element entity in the existing cluster communication network architecture, and logical architecture Simply, it is conducive to cluster time delay optimization.

It is right before carrying out call business in the embodiment of the present invention based on the cluster application server in above-described embodiment A kind of realization method that first user terminal is registered is as follows, optionally, referring to Fig. 9, above-mentioned server further includes：

Acquiring unit 901, in above-mentioned first user terminal for receiving above-mentioned signaling access and Interworking gateway transmission Registration message after, the signing information of above-mentioned first user terminal is obtained from home subscriber server；In above-mentioned registration message Carry the address of home domain when above-mentioned first user terminal is opened an account；

Registering unit 902 is right for after the signing information that above-mentioned acquiring unit 901 obtains above-mentioned first user terminal Above-mentioned first user terminal is registered.

In the embodiment of the present invention, acquiring unit 901 be used for receive the access of above-mentioned signaling and Interworking gateway send it is above-mentioned After the registration message of first user terminal, the signing information of above-mentioned first user terminal is obtained from home subscriber server；Note Volume unit 902 is used for after the signing information that above-mentioned acquiring unit 901 obtains above-mentioned first user terminal, to above-mentioned first user Terminal is registered.And by local network and roaming into corresponding logon mode when IMS network carries out business, to calling The stability that business carries out provides guarantee.

Based on the cluster application server in above-described embodiment, before carrying out call business, to first user terminal Another realization method registered is as follows, optionally, referring to Fig. 10, above-mentioned server further includes：

Acquiring unit 1001, for after receiving the access of above-mentioned signaling and notice registration message that Interworking gateway is sent, The signing information of above-mentioned first user terminal is obtained from home subscriber server；Above-mentioned notice registration message is that above-mentioned signaling connects Enter the notification message sent after being registered to above-mentioned first user terminal with Interworking gateway.

In the embodiment of the present invention, acquiring unit 1001 be used for receive the access of above-mentioned signaling and Interworking gateway send it is logical After knowing registration message, the signing information of above-mentioned first user terminal is obtained from home subscriber server；Above-mentioned notice registration disappears Breath is the notification message sent after the access of above-mentioned signaling registers above-mentioned first user terminal with Interworking gateway.And by It local network and roams into IMS network and carries out corresponding logon mode when business, the stability carried out to call business provides It ensures.

Based on the cluster application server in above-described embodiment, further, above-mentioned processing unit 804 is specifically used for upper After media resource processing module is stated as other group members foundation carrying in above-mentioned first user terminal and above-mentioned group information, Session establishment request is sent to the access of above-mentioned signaling and Interworking gateway, and by the access of above-mentioned signaling and Interworking gateway by above-mentioned meeting Words establish other group members that request is transmitted in above-mentioned group information, so that above-mentioned first user terminal is believed with above-mentioned group Other group members in breath establish session.

Angles of the Fig. 8 to embodiment shown in Fig. 10 from functional unit carries out the concrete structure of cluster application server Illustrate, the concrete structure of cluster application server is illustrated from hardware point of view below in conjunction with embodiment shown in Figure 11：

As shown in figure 11, which includes：It receiver 1101, transmitter 1102, processor 1103 and deposits Reservoir 1104.

The present embodiments relate to user equipment can have than more or fewer components illustrated in fig. 11, can be with Two or more components are combined, or there can be different components to configure or set up, all parts can be including one Or the combination realization of the hardware, software or hardware and software including multiple signal processings and/or application-specific integrated circuit.

Above-mentioned receiver 1101 is for executing following operation：

The call request for receiving the first user terminal of signaling access and Interworking gateway forwarding, carries in above-mentioned call request There is the identification information of class of service；

Above-mentioned processor 1103 is for executing following operation：

After determining that above-mentioned call request is group-calling service according to the identification information of above-mentioned class of service, to management and group work( Can module send and carry the query messages of group identification so that above-mentioned group management function module according to above-mentioned query messages from Group information corresponding with above-mentioned group identification is inquired in database；Above-mentioned group information includes group member identity's identification list And/or group's zone list；

After the return message for receiving the group information that above-mentioned group management function module is sent, handled to media resource Module sends instruction message；Above-mentioned instruction message be used to indicate above-mentioned media resource processing module be above-mentioned first user terminal and Other group members in group information establish carrying；

Other groups composition in above-mentioned media resource processing module is above-mentioned first user terminal and above-mentioned group information After member establishes carrying, other group members into above-mentioned group information initiate session establishment request, so that above-mentioned first user Terminal establishes session with other group members in above-mentioned group information.

Above-mentioned processor 1103 is additionally operable to execute following operation：

After receiving the access of above-mentioned signaling and the registration message of above-mentioned first user terminal that Interworking gateway is sent, from returning Belong to the signing information that above-mentioned first user terminal is obtained in client server；Above-mentioned first user is carried in above-mentioned registration message The address of home domain when terminal is opened an account；

After the signing information that above-mentioned acquiring unit 901 obtains above-mentioned first user terminal, to above-mentioned first user terminal It is registered.

After receiving the notice registration message of above-mentioned signaling access and Interworking gateway transmission, from home subscriber server Obtain the signing information of above-mentioned first user terminal；Above-mentioned notice registration message is the access of above-mentioned signaling and Interworking gateway to above-mentioned The notification message that first user terminal is sent after being registered.

Above-mentioned processor 1103 is specifically used for executing following operation：

Other groups composition in above-mentioned media resource processing module is above-mentioned first user terminal and above-mentioned group information After member establishes carrying, session establishment request is sent to the access of above-mentioned signaling and Interworking gateway, and by the access of above-mentioned signaling and mutually The request of above-mentioned session establishment is transmitted to other group members in above-mentioned group information by logical gateway, so that above-mentioned first user is whole Session is established in end with other group members in above-mentioned group information.

In the embodiment of the present invention, above-mentioned receiver 1101 is used to receive the above-mentioned calling of signaling access and Interworking gateway forwarding Request；Above-mentioned processor 1103 is used to determine that above-mentioned call request is group-calling service according to the identification information of above-mentioned class of service Afterwards, query messages are sent to above-mentioned group management function module, so that above-mentioned group management function module disappears according to above-mentioned inquiry Breath inquires group information corresponding with above-mentioned group identification from database；And receiving above-mentioned group management function module hair After the return message of the group information sent, instruction message is sent to media resource processing module, so that above-mentioned media resource is handled Module is that other group members in above-mentioned first user terminal and group information establish carrying；And at above-mentioned media resource It is after other group members in above-mentioned first user terminal and above-mentioned group information establish carrying, to believe to above-mentioned group to manage module Other group members in breath initiate session establishment request, so that other in above-mentioned first user terminal and above-mentioned group information Group member establishes session.Therefore, by the concrete function of above-mentioned cluster application server, reduce existing cluster communication net The Signalling exchange between network element entity in network framework, and logical architecture is simple, is conducive to cluster time delay optimization.For ease of preferably real The cluster application server for applying the embodiment of the present invention is also provided below for the cluster for coordinating above-mentioned cluster application server Communication means.

2 are please referred to Fig.1, one embodiment of cluster communication method provided by the present invention includes：

1201, the calling of the first user terminal of the access of cluster application server reception signaling and Interworking gateway forwarding is asked It asks；

MCPTT Application Server receive the call request of the first user terminal of SP_IGW forwardings, need Bright, SP_IGW receives the call request that the first user terminal is sent, and the mark of class of service is carried in above-mentioned call request Know information；The home domain of first user terminal handles call business, therefore first user terminal sends call request To the SP_IGW of ownership MCPTT Application, which is transmitted to MCPTT Application by call request Server。

1202, determine that above-mentioned call request is according to the identification information of above-mentioned class of service in above-mentioned cluster application server After group-calling service, above-mentioned cluster application server sends the query messages for carrying group identification to group management function module, So that above-mentioned group management function module inquires group corresponding with above-mentioned group identification according to above-mentioned query messages from database Group information；

Above-mentioned calling is determined according to the identification information of above-mentioned class of service in above-mentioned MCPTT Application Server Request is after group-calling service, above-mentioned MCPTT Application Server sends to Group Management Function Carry the query messages of group identification so that above-mentioned Group Management Function according to above-mentioned query messages from Group information corresponding with above-mentioned group identification is inquired in database；It is understood that above-mentioned SP_IGW turns call request It issues MCPTT Application Server and carries out business processing, MCPTT Application Server carry out business point Analysis, according to the identification information of above-mentioned class of service, after being determined as group-calling service, to above-mentioned Group Management Function sends query messages, and group identification is carried in the query messages；Above-mentioned Group Management Function Receive the above-mentioned query messages that above-mentioned MCPTT Application Server are sent, and according to above-mentioned query messages from database Corresponding with the above-mentioned group identification group information of middle inquiry, above-mentioned group information include group member identity's identification list and/or Group's zone list.

1203, above-mentioned cluster application server is receiving returning for the group information of above-mentioned group management function module transmission After returning message, instruction message is sent to media resource processing module；

Above-mentioned MCPTT Application Server are receiving above-mentioned Group Management Function transmissions Group information return message after, to above-mentioned Media Processing Function send instruction message；Above-mentioned instruction disappears It is other groups in above-mentioned first user terminal and group information that breath, which is used to indicate above-mentioned Media Processing Function, Group membership establishes carrying.

1204, other groups in above-mentioned media resource processing module is above-mentioned first user terminal and above-mentioned group information After group membership establishes carrying, other group members of above-mentioned cluster application server into above-mentioned group information initiate session establishment Request, so that above-mentioned first user terminal establishes session with other group members in above-mentioned group information.

It should be noted that being above-mentioned first user terminal and above-mentioned in above-mentioned Media Processing Function After other group members in group information establish carrying, above-mentioned SP_IGW receives above-mentioned MCPTT Application Server The session establishment request that other group members into above-mentioned group information are initiated；And the request of above-mentioned session establishment is transmitted to Other group members in group information are stated, so that above-mentioned first user terminal and other group members in above-mentioned group information Establish session.

In the embodiment of the present invention, cluster application server receives the first user terminal of signaling access and Interworking gateway forwarding Call request, and after determining that above-mentioned call request is group-calling service according to the identification information of above-mentioned class of service, to above-mentioned Group management function module sends the query messages for carrying group identification, so that above-mentioned group management function module is according to above-mentioned Query messages inquire group information corresponding with above-mentioned group identification from database；Above-mentioned cluster application server is receiving After the return message for the group information that above-mentioned group management function module is sent, sends instruction to media resource processing module and disappear Breath, so that above-mentioned media resource processing module is held for other group members foundation in above-mentioned first user terminal and group information It carries；And it is built for other group members in above-mentioned first user terminal and above-mentioned group information in above-mentioned media resource processing module After vertical carrying, other group members into above-mentioned group information initiate session establishment request, so that above-mentioned first user terminal Session is established with other group members in above-mentioned group information.The cluster communication method reduces existing cluster communication network The Signalling exchange between network element entity in framework, and logic is simple, is conducive to cluster time delay optimization.

Based on the cluster communication method in above-described embodiment, in the embodiment of the present invention, needed before carrying out group-calling service pair User registers, and logon mode refers to the following two kinds realization method,

One, 3 are please referred to Fig.1, another embodiment of cluster communication method provided by the present invention includes：

1301, registration of the cluster application server in the first user terminal for receiving signaling access and Interworking gateway transmission After message, the signing information of above-mentioned first user terminal is obtained from home subscriber server；

It should be noted that when carrying out business in the home network, above-mentioned SP_IGW receives above-mentioned first user terminal hair The registration message sent, above-mentioned MCPTT Application Server are in the above-mentioned registration message for receiving above-mentioned SP_IGW transmissions Afterwards, the signing information of above-mentioned first user terminal is obtained from above-mentioned MCPTT_HSS；Carried in above-mentioned registration message this first The address in the domains MCPTT Application Server when user terminal is opened an account；It is used comprising above-mentioned first in above-mentioned signing information The authorization data and user data of family terminal..

When roaming into progress business under IMS network, above-mentioned SP_IGW receives the registration that above-mentioned first user terminal is sent and disappears Breath, above-mentioned MCPTT Application Server are after receiving the above-mentioned registration message that above-mentioned SP_IGW is sent, from above-mentioned The signing information of above-mentioned first user terminal is obtained in MCPTT_HSS；First user terminal is carried in above-mentioned registration message The address in the domains MCPTT Application Server when opening an account；Comprising above-mentioned first user terminal in above-mentioned signing information Authorization data and user data；The registration message is forwarded to above-mentioned SP_IGW by IMS, and specially first user terminal is by the note Volume message is sent to the P-CSCF in IMS, and P-CSCF can learn user in the non-Home Network of user by information such as user identifiers, For the private network user of MCPTT Application, the IBCF processing in IMS is sent a message to；IBCF is according to above-mentioned registration The address in the domains MCPTT Application Server carried in message, above-mentioned SP_IGW is sent to by the registration message.

1302, above-mentioned cluster application server is after the signing information for obtaining above-mentioned first user terminal, to above-mentioned first User terminal is registered；

It should be noted that when local network carries out business, above-mentioned MCPTT Application Server are being received After the above-mentioned registration message sent to above-mentioned SP_IGW, the signing of above-mentioned first user terminal is obtained from above-mentioned MCPTT_HSS Information, and above-mentioned first user terminal is registered；Include the authentication number of above-mentioned first user terminal in above-mentioned signing information According to and user data；MCPTT Application Server complete the registration of above-mentioned first user terminal.

When roaming into progress business under IMS network, above-mentioned MCPTT Application Server are receiving above-mentioned SP_ After the above-mentioned registration message that IGW is sent, the signing information of above-mentioned first user terminal is obtained from above-mentioned MCPTT_HSS, and right Above-mentioned first user terminal is registered；Include the authorization data and number of users of above-mentioned first user terminal in above-mentioned signing information According to；MCPTT Application Server complete the registration of above-mentioned first user terminal.

1303, above-mentioned cluster application server receives the first user terminal of above-mentioned signaling access and Interworking gateway forwarding Call request；

The calling that above-mentioned MCPTT Application Server receive the first user terminal of above-mentioned SP_IGW forwardings is asked It asks；It should be noted that when local network carries out business, above-mentioned SP_IGW receives the calling that the first user terminal is sent and asks It asks, the identification information of class of service is carried in above-mentioned call request；The home domain of first user terminal handles call business, Therefore call request is sent to the SP_IGW of ownership MCPTT Application by first user terminal, which will Call request is transmitted to MCPTT Application Server.

When roaming into progress business under IMS network, above-mentioned SP_IGW receives the call request that the first user terminal is sent, on State the identification information that class of service is carried in call request；The home domain of first user terminal handles call business, therefore Call request is sent to the SP_IGW of ownership MCPTT Application by first user terminal；At this point, also by IMS into Row forwarding, the P-CSCF that specially the first user terminal sends the call request when user's registration, have recorded IBCF and ownership The addresses SP_IGW at network, and the address of the two network elements is placed in Route header fields, P-CSCF should by Route header fields Call request is transmitted to IBCF；IBCF controls the carrying between IBGF foundation and first user terminal；IBCF passes through the calling The Request-URI carried in request parses the addresses SP_IGW in the call request, which is transmitted to above-mentioned Call request is transmitted to MCPTT Application Server by the home domain SP_IGW of the first user terminal, the SP_IGW.

1304, determine that above-mentioned call request is according to the identification information of above-mentioned class of service in above-mentioned cluster application server After group-calling service, above-mentioned cluster application server sends the query messages for carrying group identification to group management function module, So that above-mentioned group management function module inquires group corresponding with above-mentioned group identification according to above-mentioned query messages from database Group information；

Above-mentioned calling is determined according to the identification information of above-mentioned class of service in above-mentioned MCPTT Application Server Request is after group-calling service, above-mentioned MCPTT Application Server sends to Group Management Function Carry the query messages of group identification so that above-mentioned Group Management Function according to above-mentioned query messages from Group information corresponding with above-mentioned group identification is inquired in database；It should be noted that above-mentioned SP_IGW turns call request It issues MCPTT Application Server and carries out business processing, MCPTT Application Server carry out business point Analysis, according to the identification information of above-mentioned class of service, after being determined as group-calling service, to above-mentioned Group Management Function sends query messages, and group identification is carried in the query messages；Above-mentioned Group Management Function Receive the above-mentioned query messages that above-mentioned MCPTT Application Server are sent, and according to above-mentioned query messages from database Corresponding with the above-mentioned group identification group information of middle inquiry, above-mentioned group information include group member identity's identification list and/or Group's zone list.

1305, above-mentioned cluster application server is receiving returning for the group information of above-mentioned group management function module transmission After returning message, instruction message is sent to media resource processing module；

1306, other groups in above-mentioned media resource processing module is above-mentioned first user terminal and above-mentioned group information After group membership establishes carrying, other group members of above-mentioned cluster application server into above-mentioned group information initiate session establishment Request, so that above-mentioned first user terminal establishes session with other group members in above-mentioned group information.

In the embodiment of the present invention, above-mentioned cluster application server is receiving what above-mentioned signaling access was sent with Interworking gateway After above-mentioned registration message, the signing information of above-mentioned first user terminal is obtained from above-mentioned home subscriber server, and to above-mentioned First user terminal is registered；And by local network and roaming into corresponding registration side when IMS network carries out business Formula, the stability carried out to call business provide guarantee.

Two, 4 are please referred to Fig.1, another embodiment of cluster communication method provided by the present invention includes：

1401, cluster application server receive signaling access and Interworking gateway send notice registration message after, from The signing information of above-mentioned first user terminal is obtained in home subscriber server；

MCPTT Application Server are after the notice registration message for receiving SP_IGW transmissions, from MCPTT_ The signing information of above-mentioned first user terminal is obtained in HSS；Above-mentioned notice registration message is that above-mentioned SP_IGW is used above-mentioned first The notification message that family terminal is sent after being registered；It should be noted that when carrying out business in the home network, above-mentioned SP_IGW Receive the registration message that above-mentioned first user terminal is sent, and according to above-mentioned registration message from being obtained in above-mentioned MCPTT_HSS State the signing information of the first user terminal, and according to the signing information of above-mentioned first user terminal to above-mentioned first user terminal It is registered；The address of home domain when above-mentioned first user terminal is opened an account is carried in above-mentioned registration message；First user Terminal carries the address in the domains SP_IGW, and registration message is sent to SP_IGW；SP_IGW obtains above-mentioned first from MCPTT_HSS and uses The signing information of family terminal includes above-mentioned first user terminal in above-mentioned signing information to complete the registration of first user terminal Authorization data and user data；After completing registration, SP_IGW sends notice registration to MCPTT Application Server Message；MCPTT Application Server are after receiving the notice registration message that above-mentioned SP_IGW is sent from MCPTT_ The signing information that above-mentioned first user terminal is obtained in HSS is registered with completion notice；

When roaming into progress business under IMS network, above-mentioned SP_IGW receives the registration that above-mentioned first user terminal is sent and disappears It ceases, and obtains the signing information of above-mentioned first user terminal from above-mentioned MCPTT_HSS according to above-mentioned registration message, and according to The signing information of above-mentioned first user terminal registers above-mentioned first user terminal；It is carried in above-mentioned registration message above-mentioned The address of home domain when first user terminal is opened an account；IBCF is according to the MCPTT carried in the first user terminal registration message The registration message is sent to SP_IGW by the address in the domains Application；SP_IGW obtains above-mentioned first from MCPTT_HSS The signing information of user terminal includes above-mentioned first user end to complete the registration of first user terminal in above-mentioned signing information The authorization data and user data at end；After completing registration, SP_IGW sends notice note to MCPTT Application Server Volume message；MCPTT Application Server are after receiving the notice registration message that above-mentioned SP_IGW is sent from MCPTT_ The signing information that above-mentioned first user terminal is obtained in HSS is registered with completion notice.

1402, above-mentioned cluster application server receives the first user terminal of above-mentioned signaling access and Interworking gateway forwarding Call request；

When roaming into progress business under IMS network, above-mentioned SP_IGW receives the call request that the first user terminal is sent, on State the identification information that class of service is carried in call request；The home domain of first user terminal handles call business, therefore Call request is sent to the SP_IGW of ownership MCPTT Application by first user terminal；At this point, also by IMS into Row forwarding, the P-CSCF that specially first user terminal sends the call request when user's registration, have recorded IBCF and return Belong to the addresses SP_IGW at network, and the address of the two network elements is placed in Route header fields, P-CSCF will by Route header fields The call request is transmitted to IBCF；IBCF controls the carrying between IBGF foundation and first user terminal；IBCF is exhaled by this It is the Request-URI carried in request, the addresses SP_IGW in the call request is parsed, which is transmitted to The home domain SP_IGW of the first user terminal is stated, which is transmitted to MCPTT Application by call request Server。

1403, determine that above-mentioned call request is according to the identification information of above-mentioned class of service in above-mentioned cluster application server After group-calling service, above-mentioned cluster application server sends the query messages for carrying group identification to group management function module, So that above-mentioned group management function module inquires group corresponding with above-mentioned group identification according to above-mentioned query messages from database Group information；

1404, above-mentioned cluster application server is receiving returning for the group information of above-mentioned group management function module transmission After returning message, instruction message is sent to media resource processing module；

1405, other groups in above-mentioned media resource processing module is above-mentioned first user terminal and above-mentioned group information After group membership establishes carrying, other group members of above-mentioned cluster application server into above-mentioned group information initiate session establishment Request, so that above-mentioned first user terminal establishes session with other group members in above-mentioned group information.

In the embodiment of the present invention, cluster application server is in the notice registration for receiving signaling access and Interworking gateway transmission After message, the signing information of above-mentioned first user terminal is obtained from home subscriber server, is registered with completion notice；And pass through In local network and corresponding logon mode when IMS network carries out business is roamed into, is carried to the stability of call business progress It has supplied to ensure.

It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description, The specific work process of device and unit, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.

In several embodiments provided herein, it should be understood that disclosed system, device and method can be with It realizes by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the unit It divides, only a kind of division of logic function, formula that in actual implementation, there may be another division manner, such as multiple units or component It can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, it is shown or The mutual coupling, direct-coupling or communication connection discussed can be the indirect coupling by some interfaces, device or unit It closes or communicates to connect, can be electrical, machinery or other forms.

The above, the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to before Stating embodiment, invention is explained in detail, it will be understood by those of ordinary skill in the art that：It still can be to preceding The technical solution recorded in each embodiment is stated to modify or equivalent replacement of some of the technical features；And these Modification or replacement, the spirit and scope for various embodiments of the present invention technical solution that it does not separate the essence of the corresponding technical solution.

Claims

1. a kind of trunked communication system, which is characterized in that including：

Cluster application server, home subscriber server, signaling access and Interworking gateway, group management function module, media money Source processing module；

The signaling access and Interworking gateway are used to receive the call request of the first user terminal transmission, are taken in the call request Identification information with class of service；

The cluster application server is used to receive the call request of the signaling access and Interworking gateway forwarding, and in root The call request is determined according to the identification information of the class of service after group-calling service, to be sent out to the group management function module Query messages are sent, group identification is carried in the query messages；

The group management function module is used to receive the query messages that the cluster application server is sent, and according to institute It states query messages and inquires group information corresponding with the group identification from database, the group information includes group member Identity identification list and/or group's zone list；

The cluster application server is additionally operable in the return for receiving the group information that the group management function module is sent After message, instruction message is sent to the media resource processing module；The instruction message is used to indicate at the media resource It is that other group members in first user terminal and group information establish carrying to manage module；

The cluster application server is additionally operable in the media resource processing module be first user terminal and the group After other group members in group information establish carrying, other group members into the group information, which initiate session establishment, asks It asks, so that first user terminal establishes session with other group members in the group information；

The signaling access and Interworking gateway, are additionally operable to that the session establishment is forwarded to ask to other groups in the group information Group membership.

2. trunked communication system according to claim 1, which is characterized in that

The signaling access and Interworking gateway are additionally operable to receive the registration message that first user terminal is sent, and the registration disappears The address of home domain when first user terminal is opened an account is carried in breath；

The cluster application server is additionally operable in the registration message for receiving the signaling access and Interworking gateway transmission Afterwards, the signing information of first user terminal is obtained from the home subscriber server, and to first user terminal It is registered.

3. trunked communication system according to claim 1, which is characterized in that the signaling access and Interworking gateway are additionally operable to The registration message that first user terminal is sent is received, and is obtained from the home subscriber server according to the registration message Take the signing information of first user terminal, and according to the signing information of first user terminal to first user Terminal is registered；The address of home domain when first user terminal is opened an account is carried in the registration message；

The cluster application server is additionally operable in the notice registration message for receiving the signaling access and Interworking gateway transmission Afterwards, the signing information of first user terminal is obtained from the home subscriber server.

4. trunked communication system according to any one of claims 1 to 3, which is characterized in that the trunked communication system is logical It crosses the media resource processing module and carries out the communication of media plane with evolved packet system EPS, and accessed by the signaling The communication of signaling plane is carried out with Interworking gateway and the evolved packet system EPS.

5. trunked communication system according to any one of claims 1 to 3, which is characterized in that the trunked communication system Quantity is at least two, the cell in each trunked communication system control setting range；Wherein, each trunked communication system Between the communication of media plane is carried out by the respective media resource processing module, and pass through the respective signaling access The communication of signaling plane is carried out with Interworking gateway.

6. trunked communication system according to claim 5, which is characterized in that pass through between each trunked communication system IP multimedia subsystem carries out roaming communication, wherein the media resource processing module in each trunked communication system and institute The communication that IP multimedia subsystem carries out media plane is stated, the signaling access in each trunked communication system and Interworking gateway The communication of signaling plane is carried out with the IP multimedia subsystem.

7. trunked communication system according to claim 6, which is characterized in that the signaling access and Interworking gateway are specifically used In the registration message that first user terminal for receiving IP multimedia subsystem forwarding is sent, and by the registration message It is sent to the cluster application server.

8. trunked communication system according to claim 6, which is characterized in that the signaling access and Interworking gateway are specifically used In the call request that first user terminal for receiving the IP multimedia subsystem forwarding is sent.

9. trunked communication system according to any one of claims 1 to 3, which is characterized in that the signaling access and intercommunication Gateway is additionally operable to receive the session establishment that other group members of the cluster application server into the group information are initiated Request, and session establishment request is transmitted to other group members in the group information, so that first user Terminal establishes session with other group members in the group information.

10. a kind of cluster application server, which is characterized in that including：

Receiving unit, the call request of the first user terminal for receiving signaling access and Interworking gateway forwarding, the calling The identification information of class of service is carried in request；

First transmission unit, for determining that the call request is group-calling service according to the identification information of the class of service Afterwards, the query messages for carrying group identification are sent to group management function module, so that the group management function module root Group information corresponding with the group identification is inquired from database according to the query messages；The group information includes group Member identities' identification list and/or group's zone list；

Second transmission unit, for after the return message for receiving the group information that the group management function module is sent, Instruction message is sent to media resource processing module；It is described that the instruction message, which is used to indicate the media resource processing module, Other group members in first user terminal and group information establish carrying；

Processing unit, for its in being first user terminal and the group information in the media resource processing module After his group member establishes carrying, other group members into the group information initiate session establishment request, so that described First user terminal establishes session with other group members in the group information；

11. cluster application server according to claim 10, which is characterized in that the server further includes：

Acquiring unit, for disappearing in the registration for first user terminal for receiving the signaling access and Interworking gateway transmission After breath, the signing information of first user terminal is obtained from home subscriber server；It is carried in the registration message State the address of home domain when the first user terminal is opened an account；

Registering unit, for after the signing information that the acquiring unit obtains first user terminal, using described first Family terminal is registered.

12. cluster application server according to claim 10, which is characterized in that the server further includes：

Acquiring unit, for after receiving the notice registration message of the signaling access and Interworking gateway transmission, being used from ownership The signing information of first user terminal is obtained in the server of family；The notice registration message is signaling access and intercommunication The notification message that gateway is sent after being registered to first user terminal.

13. according to claim 10 to 12 any one of them cluster application server, which is characterized in that the processing unit tool Body is used for other group members in the media resource processing module is first user terminal and the group information After establishing carrying, session establishment request is sent to signaling access and Interworking gateway, and is accessed by the signaling and intercommunication Session establishment request is transmitted to other group members in the group information by gateway, so that first user terminal Session is established with other group members in the group information.

14. a kind of cluster communication method, which is characterized in that including：

Cluster application server receives the call request of the first user terminal of signaling access and Interworking gateway forwarding, the calling The identification information of class of service is carried in request；

Determine that the call request is group-calling service according to the identification information of the class of service in the cluster application server Afterwards, the cluster application server sends the query messages for carrying group identification to group management function module, so that described Group management function module inquires group information corresponding with the group identification according to the query messages from database；Institute It includes group member identity's identification list and/or group's zone list to state group information；

The cluster application server after the return message for receiving the group information that the group management function module is sent, Instruction message is sent to media resource processing module；It is described that the instruction message, which is used to indicate the media resource processing module, Other group members in first user terminal and group information establish carrying；

It is built for other group members in first user terminal and the group information in the media resource processing module After vertical carrying, other group members of the cluster application server into the group information initiate session establishment request, with First user terminal is set to establish session with other group members in the group information；

15. cluster communication method according to claim 14, which is characterized in that the cluster application server receives signaling Include before the call request of access and Interworking gateway forwarding：

The cluster application server is receiving first user terminal of the signaling access and Interworking gateway transmission After registration message, the signing information of first user terminal is obtained from home subscriber server；It is taken in the registration message The address of home domain when opening an account with first user terminal；

The cluster application server after the signing information for obtaining first user terminal, to first user terminal into Row registration.

16. cluster communication method according to claim 14, which is characterized in that the cluster application server receives signaling Include before the call request of access and Interworking gateway forwarding：

The cluster application server is after receiving signaling access and notice registration message that Interworking gateway is sent, from returning Belong to the signing information that first user terminal is obtained in client server；The notice registration message be the signaling access and The notification message that Interworking gateway is sent after being registered to first user terminal.

17. according to claim 14 to 16 any one of them cluster communication method, which is characterized in that the cluster application service Other group members of device into the group information are initiated session establishment request and are specifically included：

The cluster application server sends session establishment request to signaling access and Interworking gateway, and passes through the signaling Session establishment request is transmitted to other group members in the group information by access and Interworking gateway, so that described the One user terminal establishes session with other group members in the group information.