WO2016112671A1 - 一种集群通信系统、服务器及通信方法 - Google Patents

一种集群通信系统、服务器及通信方法 Download PDF

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Publication number
WO2016112671A1
WO2016112671A1 PCT/CN2015/084240 CN2015084240W WO2016112671A1 WO 2016112671 A1 WO2016112671 A1 WO 2016112671A1 CN 2015084240 W CN2015084240 W CN 2015084240W WO 2016112671 A1 WO2016112671 A1 WO 2016112671A1
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WIPO (PCT)
Prior art keywords
group
user terminal
application server
information
cluster
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PCT/CN2015/084240
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English (en)
French (fr)
Inventor
董颖
李海月
刘绍峰
李靖
杨艳梅
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华为技术有限公司
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Publication of WO2016112671A1 publication Critical patent/WO2016112671A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/40—Support for services or applications
    • H04L65/403—Arrangements for multi-party communication, e.g. for conferences
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L51/00—User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols, e.g. e-mail
    • H04L51/07—User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols, e.g. e-mail characterised by the inclusion of specific contents
    • H04L51/10—Multimedia information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/14—Session management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H04W4/10—Push-to-Talk [PTT] or Push-On-Call services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a trunking communication system, a server, and a communication method.
  • LTE Long Term Evolution
  • SIP Session Initiation Protocol
  • PoC Push to Talk over Cellular
  • PTT Push to Talk
  • PTT also known as "Push-to-Talk”
  • PTT implements the mobile voice service of Walkie-Talkie (telephone), which has a short call setup time, the speech only occupies the channel, and the listener only listens to the channel, and the receiver can accept the call information at any time without going off-hook.
  • PoC is a two-way, instant and multi-party communication that allows communication between two or more users.
  • the PoC service is similar to the mobile intercom service, in which the user buttons talk to other users or broadcast to all participants in a group.
  • IMS IP Multimedia Subsystem
  • the MCPTT (Mission Critical Push To Talk over LTE) is a key task for the push-to-talk function of the LTE network.
  • the logical function entity of the MCPTT architecture is not divided, and the specific deployment scheme of the MCPTT architecture is not described.
  • the network element is more The architecture is complex.
  • the invention provides a cluster communication system, a server and a communication method, and performs logical entity division and system deployment on the MCPTT architecture to facilitate cluster delay optimization.
  • a first aspect of the present invention provides a trunking communication system, including:
  • a cluster application server a home user server, a signaling access and interworking gateway, a group management function module, and a media resource processing module;
  • the signaling access and interworking gateway is configured to receive a call request sent by the first user terminal, where the call request carries the identification information of the service category;
  • the cluster application server is configured to receive the call request forwarded by the signaling access and the interworking gateway, and after determining, according to the identifier information of the service category, that the call request is a group call service, to the group
  • the management function module sends a query message, where the query message carries a group identifier
  • the group management function module is configured to receive the query message sent by the cluster application server, and query, according to the query message, the group information corresponding to the group identifier from a database, where the group information includes a list of group memberships and/or a list of group areas;
  • the cluster application server is further configured to: after receiving the return message of the group information sent by the group management function module, send an indication message to the media resource processing module; the indication message is used to indicate the media resource
  • the processing module establishes a bearer for the first user terminal and other group members in the group information;
  • the cluster application server is further configured to: after the media resource processing module establishes a bearer for the first user terminal and other group members in the group information, to other group members in the group information.
  • a session establishment request is initiated to cause the first user terminal to establish a session with other group members in the group information.
  • the signaling access and interworking gateway is further configured to receive a registration message sent by the first user terminal, where the registration message carries an address of a home domain when the first user terminal opens an account;
  • the cluster application server is further configured to: after receiving the registration message sent by the signaling access and the interworking gateway, acquire the subscription information of the first user terminal from the home subscriber server, and The first user terminal registers.
  • the letter And the accessing and interworking gateway is further configured to receive the registration message sent by the first user terminal, and obtain the subscription information of the first user terminal from the home user server according to the registration message, and according to the The subscription information of the user terminal is registered with the first user terminal; the registration message carries the address of the home domain when the first user terminal opens the account;
  • the cluster application server is further configured to acquire the subscription information of the first user terminal from the home subscriber server after receiving the notification registration message sent by the signaling access and the interworking gateway.
  • the cluster communication system passes The media resource processing module performs communication with the evolved packet system EPS on the media plane, and performs signaling plane communication with the evolved packet system EPS through the signaling access and interworking gateway.
  • the cluster communication system The number is at least two, each cluster communication system controls a cell within a set range; wherein each of the cluster communication systems performs media plane communication through respective media resource processing modules, and passes the respective letters
  • the access and interworking gateways perform signaling plane communication.
  • each of the cluster communication systems performs roaming communication through an IP multimedia subsystem, where each cluster is The media resource processing module in the communication system performs media plane communication with the IP multimedia subsystem, and the signaling access and interworking gateways in the respective trunking communication systems perform signaling plane communication with the IP multimedia subsystem.
  • the signaling access and interworking gateway is specifically configured to receive, by the IP multimedia subsystem, the a registration message sent by the first user terminal, and sending the registration message to the cluster application server.
  • the signaling access and interworking gateway is specifically configured to receive, by the IP multimedia subsystem, the A call request sent by the first user terminal.
  • the signaling access Interworking The gateway is further configured to receive a session establishment request initiated by the cluster application server to other group members in the group information, and forward the session establishment request to other group members in the group information, to The first user terminal is caused to establish a session with other group members in the group information.
  • a second aspect of the present invention provides a cluster application server, including:
  • a receiving unit configured to receive a call request of the first user terminal that is forwarded by the signaling access and the interworking gateway, where the call request carries the identification information of the service category;
  • a first sending unit configured to: after determining that the call request is a group call service according to the identifier information of the service category, send a query message carrying a group identifier to the group management function module, so that the group management The function module queries, according to the query message, the group information corresponding to the group identifier from the database; the group information includes a group member identity list and/or a group area list;
  • a second sending unit configured to send an indication message to the media resource processing module after receiving the return message of the group information sent by the group management function module, where the indication message is used to indicate that the media resource processing module is The first user terminal and other group members in the group information establish a bearer;
  • a processing unit configured to initiate session establishment to other group members in the group information after the media resource processing module establishes a bearer for the first user terminal and other group members in the group information Requesting to cause the first user terminal to establish a session with other group members in the group information.
  • the server further includes:
  • An acquiring unit configured to acquire, by the home subscriber server, subscription information of the first user terminal after receiving the registration message of the first user terminal sent by the signaling access and the interworking gateway; the registration message Carrying an address of the home domain when the first user terminal opens an account;
  • a registration unit configured to register the first user terminal after the acquiring unit acquires the subscription information of the first user terminal.
  • the server further includes:
  • An acquiring unit configured to acquire, by the home subscriber server, subscription information of the first user terminal after receiving the notification registration message sent by the signaling access and the interworking gateway; the notification registration message is the signaling Notification sent by the access and interworking gateway after registering the first user terminal interest.
  • the processing unit is specifically used After the media resource processing module establishes a bearer for the first user terminal and other group members in the group information, sending a session establishment request to the signaling access and interworking gateway, and by using the The signaling access and interworking gateway forwards the session establishment request to other group members in the group information to cause the first user terminal to establish a session with other group members in the group information.
  • a third aspect of the present invention provides a cluster communication method, including:
  • the cluster application server receives the call request of the first user terminal that is forwarded by the signaling access and the interworking gateway, where the call request carries the identification information of the service category;
  • the cluster application server After the cluster application server determines that the call request is a group call service according to the identifier information of the service category, the cluster application server sends a query message carrying a group identifier to the group management function module, so that the The group management function module queries, according to the query message, the group information corresponding to the group identifier from the database; the group information includes a group member identity list and/or a group area list;
  • the cluster application server After receiving the return message of the group information sent by the group management function module, the cluster application server sends an indication message to the media resource processing module, where the indication message is used to indicate that the media resource processing module is The first user terminal and other group members in the group information establish a bearer;
  • the cluster application server After the media resource processing module establishes a bearer for the first user terminal and other group members in the group information, the cluster application server initiates session establishment to other group members in the group information. Requesting to cause the first user terminal to establish a session with other group members in the group information.
  • the method before the cluster application server receives the signaling request forwarded by the signaling access and the interworking gateway, the method includes:
  • the cluster application server After receiving the registration message of the first user terminal sent by the signaling access and the interworking gateway, the cluster application server acquires the subscription information of the first user terminal from the home user server; the registration message Carrying an address of the home domain when the first user terminal opens an account;
  • the cluster application server obtains the subscription information of the first user terminal, the first The user terminal registers.
  • the method before the cluster application server receives the signaling request forwarded by the signaling access and the interworking gateway, the method includes:
  • the cluster application server After receiving the notification registration message sent by the signaling access and the interworking gateway, the cluster application server acquires the subscription information of the first user terminal from the home user server; the notification registration message is the signaling A notification message sent by the access and interworking gateway after registering the first user terminal.
  • the cluster application server specifically include:
  • the embodiment of the present invention has the following advantages: the cluster application server is configured to receive the call request forwarded by the signaling access and the interworking gateway, and the identification information according to the service category After determining that the call request is a group call service, sending a query message to the group management function module; the cluster application server is further configured to: after receiving the return message of the group information sent by the group management function module Sending an indication message to the media resource processing module, so that the media resource processing module establishes a bearer for the first user terminal and other group members in the group information; and the media resource processing module is After the first user terminal and other group members in the group information establish a bearer, initiate a session establishment request to other group members in the group information, so that the first user terminal and the group are Other group members in the group information establish a session. Therefore, through the specific deployment scheme of the foregoing cluster communication system, the network element entity in the existing trunking communication network architecture is reduced, and the logical architecture is simple, which is beneficial to cluster delay optimization.
  • FIG. 1 is a schematic structural diagram of a trunking communication system according to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram of a network architecture of a trunking communication system according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of another network architecture of a trunking communication system according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of another network architecture of a trunking communication system according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of another network architecture of a trunking communication system according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic diagram of another network architecture of a trunking communication system according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of another network architecture of a trunking communication system according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of a cluster application server according to an embodiment of the present disclosure.
  • FIG. 9 is another schematic structural diagram of a cluster application server according to an embodiment of the present disclosure.
  • FIG. 10 is another schematic structural diagram of a cluster application server according to an embodiment of the present disclosure.
  • FIG. 11 is another schematic structural diagram of a cluster application server according to an embodiment of the present disclosure.
  • FIG. 12 is a schematic flowchart of a cluster communication method according to an embodiment of the present invention.
  • FIG. 13 is another schematic flowchart of a cluster communication method according to an embodiment of the present disclosure.
  • FIG. 14 is another schematic flowchart of a cluster communication method according to an embodiment of the present invention.
  • first, second, etc. may be used to describe individual users or terminals in the embodiments of the present invention, the user or terminal should not be limited to these terms. These terms are only used to distinguish users or terminals from each other.
  • first user may also be referred to as a second user without departing from the scope of the embodiments of the present invention.
  • second user may also be referred to as a first user; similarly, the second user may also be This is not limited by the embodiment of the present invention.
  • the trunking communications system includes:
  • the cluster application server 101 the home subscriber server 102, the signaling access and interworking gateway 103, the group management function module 104, and the media resource processing module 105;
  • the signaling access and interworking gateway 103 is configured to receive a call request sent by the first user terminal, where the call request carries the identification information of the service category;
  • the cluster application server 101 is configured to receive the foregoing call request forwarded by the signaling access and interworking gateway 103, and after determining that the call request is a group call service according to the identifier information of the service category, to the group management function module 104. Sending a query message, where the query message carries a group identifier;
  • the group management function module 104 is configured to receive the query message sent by the cluster application server 101, and query, according to the query message, the group information corresponding to the group identifier from the database, where the group information includes group membership. Identification list and/or group area list;
  • the cluster application server 101 is further configured to: after receiving the return message of the group information sent by the group management function module 104, send an indication message to the media resource processing module 105; the indication message is used to indicate the media resource processing module.
  • 105 establishing a bearer for the first user terminal and other group members in the group information;
  • the cluster application server 101 is further configured to: after the media resource processing module 105 establishes a bearer for the first user terminal and other group members in the group information, initiate session establishment to other group members in the group information.
  • the request is such that the first user terminal establishes a session with other group members in the group information.
  • the cluster application server 101 is configured to receive the call request forwarded by the signaling access and the interworking gateway 103, and after determining that the call request is a group call service according to the identification information of the service category, The group management function module 104 sends an inquiry message; the cluster application server 101 is further configured to: after receiving the return message of the group information sent by the group management function module 104, send an indication message to the media resource processing module 105, to The media resource processing module 105 is configured to establish a bearer for the first user terminal and other group members in the group information, and the media resource processing module 105 is the first user terminal and other groups in the group information.
  • the session establishment request is initiated to the other group members in the group information, so that the first user terminal establishes a session with other group members in the group information. Therefore, through the specific deployment scheme of the foregoing cluster communication system, the network element entity in the existing trunking communication network architecture is reduced, and the logical architecture is simple, which is beneficial to cluster delay optimization.
  • the signaling access and interworking gateway 103 is further configured to receive the registration message sent by the first user terminal, where the registration message carries the address of the home domain when the first user terminal opens an account;
  • the cluster application server 101 is further configured to: after receiving the registration message sent by the signaling access and the interworking gateway 103, acquire the subscription information of the first user terminal from the home subscriber server 102, and obtain the subscription information of the first user terminal.
  • the terminal registers.
  • the signaling access and interworking gateway 103 is further configured to receive the registration message sent by the first user terminal, and obtain the subscription information of the first user terminal from the home subscriber server 102 according to the registration message, and The first user terminal is registered according to the subscription information of the first user terminal; the registration message carries the address of the home domain when the first user terminal opens the account;
  • the foregoing cluster communication system performs media plane communication with the evolved packet system EPS through the foregoing media resource processing module 105, and performs signaling plane communication with the evolved packet system EPS through the signaling access and interworking gateway 103.
  • the number of the foregoing cluster communication systems is at least two, and each cluster communication system controls a cell in a set range; wherein each of the foregoing cluster communication systems performs media plane communication by using the respective media resource processing module 105. And communicating with the signaling plane through the respective signaling access and interworking gateways 103 described above.
  • the network communication between the trunking communication system A and the trunking communication system B includes that the user in the trunking communication system A roams to the cluster communication system B, and the session communication between the cluster communication system A and the trunking communication system B passes.
  • the respective media resource processing modules 105 perform communication of the media plane, and perform communication of the signaling plane through the respective signaling access and interworking gateways 103.
  • each of the foregoing cluster communication systems performs roaming communication through an IP multimedia subsystem, where the media resource processing module 105 in each of the cluster communication systems performs media plane communication with the IP multimedia subsystem, and each of the foregoing cluster communications
  • the signaling access and interworking gateway 103 in the system performs signaling plane communication with the above-mentioned IP multimedia subsystem.
  • the network communication between the trunking communication system A and the trunking communication system B but there is no direct path between the two.
  • the user in the trunking communication system A roams under the cluster communication system B network, and there is no direct path between the trunking communication system A and the trunking communication system B network.
  • Cluster communication system There is a path between the system B and the IP multimedia subsystem. If there is a path between the trunking communication system A and the IP multimedia subsystem, it can be used as a transit network through the IP multimedia subsystem network; or directly roaming to the IP multimedia system network through the media.
  • the resource processing module 105 performs media plane communication with the IP multimedia subsystem, and performs signaling plane communication with the IP multimedia subsystem through the signaling access and interworking gateway 103.
  • the signaling access and interworking gateway 103 is configured to receive the registration message sent by the first user terminal that is forwarded by the IP multimedia subsystem, and send the registration message to the cluster application server 101.
  • the signaling access and interworking gateway 103 is specifically configured to receive a call request sent by the first user terminal that is forwarded by the IP multimedia subsystem.
  • the signaling access and interworking gateway 103 is further configured to receive a session establishment request initiated by the cluster application server 101 to other group members in the group information corresponding to the first user terminal, and establish the session establishment.
  • the request is forwarded to other group members in the group information, so that the first user terminal establishes a session with other group members in the group information.
  • the MCPTT Application Server is the cluster application server in the present invention, and the specific functions are as follows:
  • Registration function and authentication management including registration functions: user registration (individual registration and refresh registration), user logout, forced logout, and timeout cancellation;
  • Session management for MCPTT services, whether group calls or private calls are processed at MCPTT Server;
  • MCPTT Quality of Service
  • MRFC Multimedia Resource Function Controller
  • the advantage of this is that the media plane is completely separated from the control plane.
  • the Media Processing Function is only responsible for the processing of the media plane. All instructions are issued by the MCPTT Application Server.
  • MCPTT_HSS MCPTT Home Subscriber Server
  • MCPTT_HSS MCPTT Home Subscriber Server
  • HSS Home Subscriber Server
  • MCPTT user identification including public and private identification
  • MCPTT user security context key information for user network access authentication
  • MCPTT_HSS supports registration of MCPTT users, and stores location information of MCPTT users
  • Store information about the UE such as IMEI, IMSI, and so on.
  • the Group Management Function is a group management function module in the present invention, and is responsible for storing and managing group information.
  • the Media Processing Function is the media resource processing module in the present invention, and the specific functions are as follows:
  • MRFP Media Resource Function Process
  • SP_IGW Signaling Access and Interworking gateway in the present invention, and the specific functions are as follows:
  • Interworking with other networks such as other SP_IGW-based MCPTT Application systems, IMS systems, PSTN (Public Switched Telephone Network) systems.
  • SP_IGW-based MCPTT Application systems such as other SP_IGW-based MCPTT Application systems, IMS systems, PSTN (Public Switched Telephone Network) systems.
  • IMS systems such as other SP_IGW-based MCPTT Application systems, IMS systems, PSTN (Public Switched Telephone Network) systems.
  • PSTN Public Switched Telephone Network
  • SP_IGW is the first connection point between MCPTT terminal and MCPTT network (in the signaling plane). From the perspective of SIP, SP_IGW acts as an outbound/inbound SIP proxy server. This means that all SIP requests sent by the MCPTT terminal or received by the MCPTT terminal are subject to SP_IGW. SP_IGW continues to transmit the SIP request and response along the specified direction (to the MCPTT terminal or to the MCPTT network); from the http point of view, SP_IGW acts as an outbound/inbound HTTP proxy server, which indicates that the MCPTT terminal sends out or All HTTP requests received by the MCPTT terminal are subject to SP_IGW. SP_IGW continues to transmit HTTP requests and responses along the intended direction (to the MCPTT terminal or to the MCPTT network);
  • the SP_IGW includes the flow control management function, and configures the flow control policy to perform flow control on the signaling.
  • SP_IGW is an indispensable interworking gateway. It is responsible for connecting the signaling planes of all external networks. When the MCPTT network needs to communicate with the external network, select the appropriate network and complete the protocol conversion. For example, the SIP protocol can be converted into ISUP or BICC ( ISUP and BICC are call control protocols in circuit-switched networks. They are responsible for interworking between 3GPP SIP signaling and IETF SIP and H.323 signaling.
  • the SP_IGW is also responsible for managing the Media Processing Function resource.
  • the interface applied between the SP_IGW and the Media Processing Function is the Mc port, and the protocol is H.248.
  • the Presence Server is a status rendering server, which is used to obtain the status information of the user.
  • the specific functions are as follows:
  • Manage Xml Extensible Mark-up Language
  • contact lists such as contact lists, MCPTT group lists, and support the following operations: create, modify, restore, and delete.
  • BM-SC Broadcast Multicast Service Center
  • EPS Evolved Packet System
  • IMS Core represents an IP multimedia system
  • each functional module is connected through an interface, and the interface functions are as follows:
  • GMF The GMF interface is located between the MCPTT Application Server and the Group Management Function for the MCPTT group call and the delivery of group information in the private call flow.
  • the Mc:M interface is located between the MCPTT Application Server and the Media Processing Funcion, and the Mc is located between the SP_IGW and the Media Processing Funcion. This interface is used to control Media resources on Media Processing Funcion, as well as calls for special resources.
  • MCP-1 Located between the MCPTT Application Server and SP_IGW for MCPTT service triggering and sending the session to the MCPTT Application Server server to complete the final processing of the business logic.
  • the Cx/Sh interface is located between the MCPTT Application Server and MCPTT_HSS.
  • the role of the Cx interface is: MCPTT Application Server obtains information about roaming authorization and security parameters required for MCPTT user access authentication from MCPTT_HSS; the role of the Sh interface is: MCPTT Application Server obtains user data from MCPTT_HSS.
  • the GS:GS interface is located between the SP_IGW and the Group Management Function and is used to pass information about the join/exit/create group reported by the user.
  • the SS interface is the interface between the SP_IGWs of the two networks when the two MCPTT Application networks are interworking. When used for interworking between two networks, the signaling is forwarded from one MCPTT Application network to another MCPTT Application network.
  • the SI interface is the interface between SP_IGW and IBCF when the MCPTT Application network is interworking with the IMS network.
  • the signaling MCPTT Application network is forwarded to or from the IMS network to the MCPTT Application network.
  • the PM:PM interface is located between the Presence Server and the MCPTT Application Server to obtain user status.
  • the PS interface is located between the Presence Server and the SP_IGW, and is used to convey the signaling of the interaction between the MCPTT UE and the Presence Server, and the signaling of the Presence Server to obtain the status of other network users.
  • trunking communication system Based on the system architecture of the above-mentioned trunking communication system, the specific functions of the trunking communication system in different scenarios are described.
  • the SP_IGW is configured to receive the registration message sent by the first user terminal UE_1, where the registration message carries the address of the home domain when the first user terminal opens an account;
  • the MCPTT Application Server is configured to: after receiving the registration message sent by the SP_IGW, obtain the subscription information of the first user terminal from the MCPTT_HSS, and register the first user terminal;
  • the foregoing registration message carries the address of the MCPTT Application Server domain when the UE_1 is opened; the subscription information includes the authentication data and the user data of the first user terminal, and the MCPTT Application Server completes the foregoing first user terminal. registered.
  • the foregoing SP_IGW is configured to receive a call request sent by the first user terminal, where the call request carries the identification information of the service category;
  • the home domain of the first user terminal processes the call service, and therefore the first user terminal sends a call request to the SP_IGW of the home MCPTT Application.
  • the MCPTT Application Server is configured to receive the foregoing call request forwarded by the SP_IGW, and after determining that the call request is a group call service according to the identifier information of the service category, send an inquiry message to the Group Management Function, where the query message carries a group Group identification
  • the SP_IGW forwards the call request to the MCPTT Application Server for service processing, and the MCPTT Application Server performs service analysis, and sends a query message to the Group Management Function after determining the group call service according to the identification information of the service category.
  • the query message carries a group identifier.
  • the group management function is configured to receive the foregoing query message sent by the MCPTT Application Server, and query, according to the query message, the group information corresponding to the group identifier from the database, where the group information includes a group membership identifier list and/or Or a list of group areas;
  • the MCPTT Application Server is further configured to: after receiving the return message of the group information sent by the Group Management Function, send an indication message to the Media Processing Function, where the indication message is used to indicate that the Media Processing Function is the first user terminal and Other group members in the group information establish a bearer;
  • the foregoing SP_IGW is further configured to receive a session establishment request initiated by the MCPTT Application Server to other group members in the group information, and forward the session establishment request to other group members in the group information, so that the foregoing A user terminal establishes a session with other group members in the group information.
  • the foregoing MCPTT Application Server indicates the above Media.
  • the MCPTT Application Server initiates a session to other group members in the group information, and the SP_IGW forwards the session establishment of the MCPTT Application Server. Requesting to other group members in the group information to enable the first user terminal to establish a session with other group members in the group information.
  • the SP_IGW is configured to receive the registration message sent by the first user terminal UE_1, where the registration message carries the address of the home domain when the first user terminal opens an account;
  • the MCPTT Application Server is configured to: after receiving the registration message sent by the SP_IGW, obtain the subscription information of the first user terminal from the MCPTT_HSS, and register the first user terminal;
  • the foregoing registration message carries the address of the MCPTT Application Server domain when the UE_1 is opened; the registration message is forwarded by the IMS to the SP_IGW, and specifically, the UE sends the registration message to the P-CSCF in the IMS (Proxy- CSCF, proxy call session control function), the P-CSCF can know that the user is not a user in the local network through the information such as the user identifier, and sends a message to the IBCF (Interconnection Border Control Function) in the IMS for the private network user of the MCPTT Application.
  • the interconnection boundary control function is processed; the IBCF sends the registration message to the SP_IGW according to the address of the MCPTT Application Server domain carried in the registration message;
  • the subscription information includes the authentication data and the user data of the first user terminal, and the MCPTT Application Server completes the registration of the first user terminal.
  • the foregoing SP_IGW is configured to receive a call request sent by the first user terminal, where the call request carries the identification information of the service category;
  • the home domain of the first user terminal processes the call service, and therefore the first user terminal sends the call request to the SP_IGW of the home MCPTT Application; at this time, the IMS also forwards the call to the first user.
  • the terminal sends the call request to the P-CSCF.
  • the SP_IGW address of the IBCF and the home network is recorded, and the addresses of the two network elements are placed in the Route header field, and the P-CSCF passes the Route header.
  • the domain forwards the call request to the IBCF; the IBCF controls the IBGF (Interconnection border gateway function) establishes a bearer with the first user terminal; the IBCF parses the call by using a Request-URI (Uniform Resource Identifier) carried in the call request.
  • the SP_IGW address in the request forwards the call request to the home domain SP_IGW of the first user terminal.
  • the MCPTT Application Server is configured to receive the foregoing call request forwarded by the SP_IGW, and after determining that the call request is a group call service according to the identifier information of the service category, send an inquiry message to the Group Management Function, where the query message carries a group Group identification
  • the SP_IGW forwards the call request to the MCPTT Application Server for service processing, and the MCPTT Application Server performs service analysis, and sends a query message to the Group Management Function after determining the group call service according to the identification information of the service category.
  • the query message carries a group identifier.
  • the group management function is configured to receive the foregoing query message sent by the MCPTT Application Server, and query, according to the query message, the group information corresponding to the group identifier from the database, where the group information includes a group membership identifier list and/or Or a list of group areas;
  • the MCPTT Application Server is further configured to: after receiving the return message of the group information sent by the Group Management Function, send an indication message to the Media Processing Function, where the indication message is used to indicate that the Media Processing Function is the first user terminal and Other group members in the group information establish a bearer;
  • the foregoing SP_IGW is further configured to receive a session establishment request initiated by the MCPTT Application Server to other group members in the group information, and forward the session establishment request to other group members in the group information, so that the foregoing A user terminal establishes a session with other group members in the group information.
  • the MCPTT Application Server instructs the Media Processing Function to establish a bearer for the first user terminal and other group members in the group information
  • the MCPTT Application Server sends the other group in the group information.
  • the member initiates a session, and the SP_IGW forwards the session establishment request of the MCPTT Application Server to other group members in the group information, so that the first user terminal establishes a session with other group members in the group information.
  • the user roams communication between the above cluster communication systems, that is, in MCPTT Application_A
  • the user under the network roams to the MCPTT Application_B network, as shown in Figure 5, in the trunking communication system,
  • the foregoing SP_IGW is configured to receive a call request sent by the first user terminal, where the call request carries the identification information of the service category;
  • the first user terminal UE_1 has already registered to the home domain, so the UE_1 carries the address of the home MCPTT Application (in fact, the address of the SP_IGW of the home domain) when the call is initiated.
  • UE_1 sends a group call session setup message to the SP_IGW of the visited domain. After the registration is successful, the IP address is recorded by the UE_1 as the address of the next hop.
  • the SP_IGW of the visited domain controls the bearer between the Media Processing Function of the visited domain and the UE_1. ;
  • the SP_IGW in the visited domain forwards the call request to the SP_IGW of the home domain of the UE_1 through the address of the visited domain carried in the call request;
  • the MCPTT Application Server is configured to receive the foregoing call request forwarded by the SP_IGW of the home domain, and after determining that the call request is a group call service according to the identifier information of the service category, send an inquiry message to the Group Management Function, where the query message is sent. Carrying a group logo;
  • the SP_IGW of the home domain forwards the call request to the MCPTT Application Server for service processing, and the MCPTT Application Server performs service analysis, and after determining the group call service according to the identification information of the service category, to the Group Management Function.
  • the query message is sent, and the query message carries a group identifier.
  • the group management function is configured to receive the foregoing query message sent by the MCPTT Application Server, and query, according to the query message, the group information corresponding to the group identifier from the database, where the group information includes a group membership identifier list and/or Or a list of group areas;
  • the MCPTT Application Server is further configured to: after receiving the return message of the group information sent by the Group Management Function, send an indication message to the Media Processing Function, where the indication message is used to indicate that the Media Processing Function is the first user terminal and Other group members in the group information establish a bearer;
  • the SP_IGW of the home domain is further configured to receive a session establishment request initiated by the MCPTT Application Server to other group members in the group information, and forward the session establishment request to other group members in the group information, to Making the first user terminal and the group information Other group members establish a session.
  • the MCPTT Application Server instructs the Media Processing Function to establish a bearer for the first user terminal and other group members in the group information
  • the MCPTT Application Server sends the other group in the group information.
  • the member initiates a session, and the SP_IGW of the home domain forwards the session establishment request of the MCPTT Application Server to other group members in the group information, so that the first user terminal establishes a session with other group members in the group information.
  • the SP_IGW can serve as a registration server.
  • the system architecture is different from the foregoing FIG. 2 in that signaling interaction is added between the SP_IGW and the MCPTT_HSS.
  • the interface is Cx/Sh (refer to the above-mentioned function definition for the interface); in the system structure, the user registration authentication is different from the above embodiment, specifically:
  • the user registers in the local network based on the system architecture.
  • the SP_IGW is configured to receive the registration message sent by the first user terminal, obtain the subscription information of the first user terminal from the MCPTT_HSS according to the registration message, and access the first user terminal according to the subscription information of the first user terminal.
  • the registration message carries the address of the home domain when the first user terminal opens the account;
  • the MCPTT Application Server is configured to obtain the subscription information of the first user terminal from the MCPTT_HSS after receiving the notification registration message sent by the SP_IGW.
  • the first user terminal carries the address of the SP_IGW domain, and sends a registration message to the SP_IGW.
  • the SP_IGW obtains the subscription information of the first user terminal from the MCPTT_HSS to complete registration of the first user terminal, where the subscription information includes The authentication data and the user data of the first user terminal are sent; after the registration is completed, the SP_IGW sends a notification registration message to the MCPTT Application Server; the MCPTT Application Server obtains the first user terminal from the MCPTT_HSS after receiving the notification registration message sent by the SP_IGW. Signing information to complete the notification registration.
  • the user registers in the IMS network based on the system architecture
  • the SP_IGW is configured to receive the registration message sent by the first user terminal, obtain the subscription information of the first user terminal from the MCPTT_HSS according to the registration message, and access the first user terminal according to the subscription information of the first user terminal.
  • the registration message carries the address of the home domain when the first user terminal opens the account;
  • the MCPTT Application Server is configured to obtain the subscription information of the first user terminal from the MCPTT_HSS after receiving the notification registration message sent by the SP_IGW.
  • the IBCF sends the registration message to the SP_IGW according to the address of the MCPTT Application field carried in the first user terminal registration message; the SP_IGW obtains the subscription information of the first user terminal from the MCPTT_HSS to complete the first user.
  • the registration of the terminal, the subscription information includes the authentication data and the user data of the first user terminal; after the registration is completed, the SP_IGW sends a notification registration message to the MCPTT Application Server; after receiving the notification registration message sent by the SP_IGW, the MCPTT Application Server The subscription information of the first user terminal is obtained from the MCPTT_HSS to complete the notification registration.
  • the registration function includes registration function and authentication management, wherein the registration function includes user registration (divided into initial registration and refresh registration), user logout and timeout cancellation; the registration function in the above MCPTT Application Server also changes, including: SP_IGW notification registration, SP_IGW notification cancellation, forced cancellation.
  • the SP_IGW in the above embodiment can be split into two independent functional entities: Signalling Proxy (Signaling Proxy Module) and Interworking GateWay (Interworking Gateway Module).
  • Signalling Proxy Signalling Proxy Module
  • Interworking GateWay Interworking Gateway Module
  • Interworking GateWay is interconnected with external networks.
  • Interworking GateWay The functions of Interworking GateWay are as follows:
  • Interconnected with the IMS network the inter-enterprise and inter-agency MCPTT networks.
  • the Signalling Proxy when the user accesses from the local EPS system, in the registration authentication process, it acts as the SP_IGW in the embodiment of FIG. 2; in the group call flow, the SP_IGW in the same embodiment is used in FIG. 2;
  • the IBCF When Signalling Proxy is not used as a registration server, registration authentication is performed when the user roams to IMS.
  • the IBCF sends a registration message to the Interworking GateWay according to the address of the MCPTT Application field carried in the user registration message, and the Interworking Gateway directly sends the registration message to the MCPTT Application Server, which is followed by the registration process of the IMS network in the same embodiment.
  • the IBCF forwards the call request to the Interworking Gateway of the UE-1 home domain through the Request-URI carried in the call request, and the Interworking Gateway analyzes the group call service, and forwards the call request to the MCPTT Application Server.
  • the MCPTT Application Server needs to instruct the Interworking GateWay to establish a group call member in the P25/PSTN or IMS system, and the Interworking GateWay also instructs the media processing module to allocate.
  • the media resource performs Codec (compilation code) conversion and the like, and is followed by the group call flow through the IMS in FIG. 4 of the embodiment.
  • the SP_IGW in the above embodiment acts as the registration process of the registration server; in the group call process, the role is the same as the SP_IGW in the above embodiment.
  • a group call process as a registration server;
  • the IBCF When the Signalling Proxy is used as the registration server, when the user roams to the IMS, in the registration authentication process, the IBCF sends the registration message to the Interworking GateWay according to the address of the MCPTT Application field carried in the user registration message, and the Interworking Gateway registers the registration message. Forwarding to the Signaling Proxy, the subsequent process is the same as the registration process of the IMS network when the SP_IGW is used as the registration server. In the group call process, the IBCF forwards the call request to the UE-1 home domain through the Request-URI carried in the call request. Interworking Gateway, the Interworking Gateway analysis is a group call service, which forwards the call request to the MCPTT Application Server.
  • the MCPTT Application Server needs to instruct the Interworking GateWay to establish the P25/PSTN. Or the group call member of the IMS system, the Interworking GateWay also instructs the media processing module to allocate the media resource, perform the Codec conversion, and the like, and subsequently the same as the embodiment SP_IGW as the registration server through the IMS group call flow.
  • Interworking Gateway and CS circuit switching network
  • PSTN/Tetra Terestial Trunked Radio
  • Signalling Proxy Packet switching network
  • IMS/MCPTT interconnection and interworking
  • Interconnected with the IMS network the inter-enterprise and inter-agency MCPTT networks.
  • Interworking GateWay The functions of Interworking GateWay are as follows:
  • the Signalling Proxy when the user accesses from the local EPS system, in the registration authentication process, it acts as the SP_IGW in the embodiment of FIG. 2; in the group call flow, the SP_IGW in the same embodiment is used in FIG. 2;
  • the IBCF When the Signalling Proxy is not used as the registration server, when the user roams to the IMS, in the registration authentication process, the IBCF sends a registration message to the Signalling Proxy according to the address of the MCPTT Application field carried in the user registration message, and the Signalling Proxy directly registers the message.
  • the process is sent to the MCPTT Application Server, which is followed by the registration process of the IMS network in Figure 4; in the group call process, the IBCF forwards the call request to the Signaling of the UE-1 home domain through the Request-URI carried in the call request.
  • the Proxy, Signaling Proxy analysis is a group call service, and the call request is forwarded to the MCPTT Application Server.
  • the MCPTT Application Server needs to instruct Interworking GateWay to establish the group member A, Interworking GateWay.
  • the media processing module is also instructed to allocate media resources, perform Codec conversion, and establish a media plane connection with the narrowband system media gateway; if the group member B is in the IMS network, the MCPTT Application Server needs to instruct the Signalling Proxy to establish the group member B.
  • ,Signalling Pro The xy indicates that the media processing module allocates the media resource, the Codec transform, and establishes the bearer with the IBGF, and subsequently follows the group call flow through the IMS in FIG. 4 in the same embodiment.
  • the SP_IGW in the above embodiment acts as the registration process of the registration server; in the group call process, the role is the same as the SP_IGW in the above embodiment.
  • a group call process as a registration server;
  • the IBCF When the Signalling Proxy is used as the registration server, the IBCF sends the registration message to the Signalling Proxy according to the address of the MCPTT Application field carried in the user registration message. When the user roams to the IMS, the IBCF sends the registration message to the Signaling Proxy according to the address of the MCPTT Application field.
  • the group call process is not affected by whether the Signalling Proxy acts as a registration server.
  • the role and description are the same as above.
  • SP_IGW is used as a group call flow of the registration server through the IMS network.
  • the two interworking methods described above can also be combined according to the actual situation (for example, Interworking with the Signalling Proxy interworking between two systems within the same enterprise and Interworking GateWay interworking between MCPTT systems of different enterprises). Achieve the purpose of deployment. Interoperate with the same system and interoperate with different systems to implement and deploy.
  • the cluster communication system in the present invention has been described above.
  • the cluster application server provided in the present invention will be described below.
  • FIG. 8 is a schematic structural diagram of a cluster application server according to an embodiment of the present invention.
  • the cluster application server includes:
  • the receiving unit 801 is configured to receive a call request of the first user terminal that is forwarded by the signaling access and the interworking gateway, where the call request carries the identification information of the service category;
  • the first sending unit 802 is configured to: after determining that the call request is a group call service according to the identifier information of the service category, send a query message carrying the group identifier to the group management function module, so that the group management function module And querying the group information corresponding to the group identifier from the database according to the query message; the group information includes a group membership identifier list and/or a group area list;
  • the second sending unit 803 is configured to: after receiving the return message of the group information sent by the group management function module, send an indication message to the media resource processing module; the indication message is used to indicate that the media resource processing module is the foregoing A user terminal and other group members in the group information establish a bearer;
  • the processing unit 804 is configured to: after the media resource processing module establishes a bearer for the first user terminal and other group members in the group information, initiate a session establishment request to other group members in the group information, to The first user terminal is caused to establish a session with other group members in the group information.
  • the receiving unit 801 is configured to receive the foregoing call request that is forwarded by the signaling access and the interworking gateway; the first sending unit 802 is configured to determine, according to the identifier information of the service category, that the call request is a group call service.
  • the second sending unit 803 is configured to receive After the return message of the group information sent by the group management function module, sending an indication message to the media resource processing module;
  • the element 804 is configured to: after the foregoing media resource processing module establishes a bearer for the first user terminal and other group members in the group information, initiate a session establishment request to other group members in the group information, so that the foregoing The first user terminal establishes a session with other group members in the group information. Therefore, through the specific deployment scheme of the foregoing cluster communication system, the network element entity in the existing trunking communication network architecture is reduced, and the logical architecture is simple, which is beneficial to cluster delay optimization.
  • an implementation manner of registering the first user terminal before performing the call service is as follows.
  • the server further includes :
  • the obtaining unit 901 is configured to obtain the subscription information of the first user terminal from the home user server after receiving the registration message of the first user terminal that is sent by the signaling access and the interworking gateway; the registration message carries The address of the home domain when the first user terminal opens an account;
  • the registration unit 902 is configured to register the first user terminal after the acquiring unit 901 acquires the subscription information of the first user terminal.
  • the acquiring unit 901 is configured to obtain the subscription information of the first user terminal from the home user server after receiving the registration message of the first user terminal by the signaling access and the interworking gateway;
  • the 902 is configured to register the first user terminal after the acquiring unit 901 acquires the subscription information of the first user terminal. And the stability of the call service is ensured by the corresponding registration mode when the local network and the roaming to the IMS network perform services.
  • the server further includes:
  • the obtaining unit 1001 is configured to obtain the subscription information of the first user terminal from the home subscriber server after receiving the notification registration message sent by the signaling access and the interworking gateway; the notification registration message is the signaling access and A notification message sent by the interworking gateway after registering the first user terminal.
  • the acquiring unit 1001 is configured to obtain the subscription information of the first user terminal from the home subscriber server after receiving the notification registration message sent by the signaling access and the interworking gateway; the notification registration message is the foregoing A notification message sent by the signaling access and the interworking gateway after registering the first user terminal. And corresponding to the service through the local network and roaming to the IMS network
  • the registration method provides guarantee for the stability of the call service.
  • the processing unit 804 is further configured to: after the media resource processing module establishes a bearer for the first user terminal and other group members in the group information, to the foregoing Having the access and the interworking gateway send a session establishment request, and forwarding the session establishment request to the other group members in the group information by using the signaling access and interworking gateway, so that the first user terminal and the group are Other group members in the message establish a session.
  • FIG. 8 to FIG. 10 illustrates the specific structure of the cluster application server from the perspective of the functional unit.
  • the specific structure of the cluster application server is described from the hardware point of view below with reference to the embodiment shown in FIG.
  • the cluster application server includes a receiver 1101, a transmitter 1102, a processor 1103, and a memory 1104.
  • the user equipment may have more or less components than those shown in FIG. 11, may combine two or more components, or may have different component configurations or settings, and each component may include Hardware, software, or a combination of hardware and software implementations of one or more signal processing and/or application specific integrated circuits.
  • the receiver 1101 is configured to perform the following operations:
  • the processor 1103 is configured to perform the following operations:
  • the group management function module After determining, according to the identifier information of the foregoing service category, that the call request is a group call service, sending a query message carrying the group identifier to the group management function module, so that the group management function module queries the database according to the query message.
  • Group information corresponding to the group identifier the group information includes a group membership identifier list and/or a group area list;
  • a session establishment request is initiated to other group members in the group information, So that the first user terminal establishes a session with other group members in the group information.
  • the processor 1103 is further configured to perform the following operations:
  • the subscription information of the first user terminal is obtained from the home user server; the registration message carries the first user terminal to open an account.
  • the acquiring unit 901 After acquiring the subscription information of the first user terminal, the acquiring unit 901 registers the first user terminal.
  • the processor 1103 is further configured to perform the following operations:
  • the notification registration message After receiving the notification registration message sent by the signaling access and the interworking gateway, acquiring the subscription information of the first user terminal from the home subscriber server; the notification registration message is the signaling access and the interworking gateway to the first A notification message sent by the user terminal after registration.
  • the processor 1103 is specifically configured to perform the following operations:
  • the media resource processing module establishes a bearer for the first user terminal and other group members in the group information, sending a session establishment request to the signaling access and the interworking gateway, and accessing and interworking through the signaling.
  • the gateway forwards the session establishment request to other group members in the group information, so that the first user terminal establishes a session with other group members in the group information.
  • the receiver 1101 is configured to receive the call request that is forwarded by the signaling access and the interworking gateway, and the processor 1103 is configured to determine, after the call request is the group call service, according to the identifier information of the service category. Sending a query message to the group management function module, so that the group management function module queries the group information corresponding to the group identifier from the database according to the query message; and receives the sending by the group management function module.
  • an embodiment of a cluster communication method provided by the present invention includes:
  • the cluster application server receives a signaling request and a call request of the first user terminal forwarded by the interworking gateway;
  • the MCPTT Application Server receives the call request of the first user terminal forwarded by the SP_IGW, and the SP_IGW receives the call request sent by the first user terminal, where the call request carries the identification information of the service category; the attribution of the first user terminal
  • the domain handles the call service, so the first user terminal sends a call request to the SP_IGW of the home MCPTT Application, which forwards the call request to the MCPTT Application Server.
  • the cluster application server After the cluster application server determines that the call request is a group call service according to the identifier information of the service type, the cluster application server sends a query message carrying the group identifier to the group management function module, so that the group management is performed.
  • the function module queries, according to the query message, the group information corresponding to the group identifier from the database;
  • the MCPTT Application Server After the MCPTT Application Server determines that the call request is a group call service according to the identifier information of the foregoing service category, the MCPTT Application Server sends a query message carrying the group identifier to the Group Management Function, so that the Group Management Function is configured according to the query message.
  • the group information corresponding to the group identifier is queried from the database. It can be understood that the SP_IGW forwards the call request to the MCPTT Application Server for service processing, and the MCPTT Application Server performs service analysis according to the identification information of the service category.
  • the query message is sent to the group management function, where the query message carries the group identifier; the group management function receives the query message sent by the MCPTT Application Server, and queries the database according to the query message. And the group information corresponding to the group identifier, where the group information includes a group membership identifier list and/or a group area list.
  • the cluster application server After receiving the return message of the group information sent by the group management function module, the cluster application server sends an indication message to the media resource processing module.
  • the MCPTT Application Server After receiving the return message of the group information sent by the group management function, the MCPTT Application Server sends an indication message to the Media Processing Function, where the indication message is used to indicate that the Media Processing Function is the first user end.
  • the other group members in the end and group information establish a bearer.
  • the cluster application server initiates a session establishment request to other group members in the group information, to The first user terminal is caused to establish a session with other group members in the group information.
  • the SP_IGW receives the MCPTT Application Server and initiates to other group members in the group information. a session establishment request; and forwarding the session establishment request to other group members in the group information, so that the first user terminal establishes a session with other group members in the group information.
  • the cluster application server receives the call request of the first user terminal that is forwarded by the signaling access and the interworking gateway, and after determining that the call request is a group call service according to the identification information of the service category, to the group
  • the management function module sends a query message carrying the group identifier, so that the group management function module queries the group information corresponding to the group identifier from the database according to the query message;
  • the cluster application server receives the group After the return message of the group information sent by the function module is sent, the indication message is sent to the media resource processing module, so that the media resource processing module establishes a bearer for the first user terminal and other group members in the group information; After the bearer is established by the first user terminal and other group members in the group information, the media resource processing module initiates a session establishment request to other group members in the group information, so that the first user terminal and the first user terminal The other group members in the above group information establish a session.
  • the cluster communication method reduces the signaling interaction between the network element entities in
  • the user needs to register before performing the group call service, and the registration mode refers to the following two implementation manners.
  • FIG. 13 another embodiment of the cluster communication method provided by the present invention includes:
  • the cluster application server After receiving the registration message of the first user terminal sent by the signaling access and the interworking gateway, the cluster application server obtains the subscription information of the first user terminal from the home user server.
  • the SP_IGW receives the registration message sent by the first user terminal, and the MCPTT Application Server receives the SP_IGW.
  • the subscription information of the first user terminal is obtained from the MCPTT_HSS; the registration message carries the address of the MCPTT Application Server domain when the first user terminal opens the account; the subscription information includes the first Authentication data and user data of the user terminal.
  • the SP_IGW When the roaming is performed on the IMS network, the SP_IGW receives the registration message sent by the first user terminal, and after receiving the registration message sent by the SP_IGW, the MCPTT Application Server obtains the subscription of the first user terminal from the MCPTT_HSS.
  • the registration message carries the address of the MCPTT Application Server domain when the first user terminal opens the account; the subscription information includes the authentication data and the user data of the first user terminal; the registration message is forwarded by the IMS to the SP_IGW.
  • the first user terminal sends the registration message to the P-CSCF in the IMS, and the P-CSCF can learn that the user is not a user in the network by using a user identifier or the like, and the message is sent to the private network user of the MCPTT Application.
  • the IBCF is sent to the IBCF for processing; the IBCF sends the registration message to the SP_IGW according to the address of the MCPTT Application Server field carried in the registration message.
  • the cluster application server After acquiring the subscription information of the first user terminal, the cluster application server registers the first user terminal;
  • the MCPTT Application Server obtains the subscription information of the first user terminal from the MCPTT_HSS after receiving the registration message sent by the SP_IGW, and performs the first user terminal on the first user terminal.
  • the registration information includes the authentication data and the user data of the first user terminal, and the MCPTT Application Server completes the registration of the first user terminal.
  • the MCPTT Application Server After roaming to the IMS network for service, the MCPTT Application Server obtains the subscription information of the first user terminal from the MCPTT_HSS after receiving the registration message sent by the SP_IGW, and registers the first user terminal;
  • the subscription information includes the authentication data and the user data of the first user terminal, and the MCPTT Application Server completes the registration of the first user terminal.
  • the foregoing cluster application server receives the call request of the first user terminal that is forwarded by the signaling access and the interworking gateway;
  • the MCPTT Application Server receives the first user terminal forwarded by the SP_IGW.
  • the call request is required to be described.
  • the SP_IGW receives the call request sent by the first user terminal, where the call request carries the identification information of the service category; the home domain of the first user terminal processes the call service. Therefore, the first user terminal sends a call request to the SP_IGW of the home MCPTT Application, and the SP_IGW forwards the call request to the MCPTT Application Server.
  • the SP_IGW When roaming to the IMS network for the service, the SP_IGW receives the call request sent by the first user terminal, where the call request carries the identification information of the service category; the home domain of the first user terminal processes the call service, and therefore the first user The terminal sends a call request to the SP_IGW of the home MCPTT Application; at this time, it is also forwarded by the IMS, specifically, the P-CSCF that the first user terminal sends the call request, and when the user registers, the IBCF and the home network are recorded.
  • the SP_IGW address, and the addresses of the two network elements are placed in the Route header field, and the P-CSCF forwards the call request to the IBCF through the Route header field; the IBCF controls the IBGF to establish a bearer with the first user terminal;
  • the SP_IGW address in the call request is parsed by the Request-URI carried in the call request, and the call request is forwarded to the home domain SP_IGW of the first user terminal, and the SP_IGW forwards the call request to the MCPTT Application Server.
  • the cluster application server After the cluster application server determines, according to the identifier information of the service category, that the call request is a group call service, the cluster application server sends a query message carrying the group identifier to the group management function module, so that the group management is performed.
  • the function module queries, according to the query message, the group information corresponding to the group identifier from the database;
  • the MCPTT Application Server After the MCPTT Application Server determines that the call request is a group call service according to the identifier information of the foregoing service category, the MCPTT Application Server sends a query message carrying the group identifier to the Group Management Function, so that the Group Management Function is configured according to the query message. Querying the group information corresponding to the group identifier from the database; the SP_IGW forwards the call request to the MCPTT Application Server for service processing, and the MCPTT Application Server performs service analysis according to the identification information of the service category. After the group call service is determined, the query message is sent to the group management function, where the query message carries the group identifier; the group management function receives the query message sent by the MCPTT Application Server, and queries the database according to the query message. Group information corresponding to the group identifier, the group information includes group members A list of identities and/or a list of group areas.
  • the cluster application server After receiving the return message of the group information sent by the group management function module, the cluster application server sends an indication message to the media resource processing module.
  • the MCPTT Application Server After receiving the return message of the group information sent by the group management function, the MCPTT Application Server sends an indication message to the Media Processing Function, where the indication message is used to indicate that the Media Processing Function is the first user terminal and group information.
  • the other group members in the establishment establish a bearer.
  • the cluster application server After the media resource processing module establishes a bearer for the first user terminal and other group members in the group information, the cluster application server initiates a session establishment request to other group members in the group information, to The first user terminal is caused to establish a session with other group members in the group information.
  • the SP_IGW receives the MCPTT Application Server and initiates to other group members in the group information. a session establishment request; and forwarding the session establishment request to other group members in the group information, so that the first user terminal establishes a session with other group members in the group information.
  • the cluster application server after receiving the registration message sent by the signaling access and the interworking gateway, acquires the subscription information of the first user terminal from the home subscriber server, and the first user The terminal performs registration; and the stability of the call service is ensured by the corresponding registration mode when the local network and the roaming to the IMS network perform services.
  • FIG. 14 another embodiment of the cluster communication method provided by the present invention includes:
  • the cluster application server After receiving the notification registration message sent by the signaling access and the interworking gateway, the cluster application server obtains the subscription information of the first user terminal from the home user server.
  • the MCPTT Application Server After receiving the notification registration message sent by the SP_IGW, the MCPTT Application Server obtains the subscription information of the first user terminal from the MCPTT_HSS; the notification registration message is a notification message sent by the SP_IGW after registering the first user terminal; The SP_IGW receives the registration message sent by the first user terminal, and obtains the subscription information of the first user terminal from the MCPTT_HSS according to the registration message, and according to the first user terminal, when the service is performed in the local network.
  • the registration message carries the address of the home domain when the first user terminal opens the account; the first user terminal carries the address of the SP_IGW domain, and sends a registration message to the SP_IGW; the SP_IGW obtains the subscription of the first user terminal from the MCPTT_HSS.
  • the information is used to complete the registration of the first user terminal, where the subscription information includes the authentication data and the user data of the first user terminal; after the registration is completed, the SP_IGW sends a notification registration message to the MCPTT Application Server; the MCPTT Application Server receives the above After the notification registration message sent by the SP_IGW, the subscription information of the first user terminal is obtained from the MCPTT_HSS to complete the notification registration;
  • the SP_IGW When roaming to the IMS network for the service, the SP_IGW receives the registration message sent by the first user terminal, and obtains the subscription information of the first user terminal from the MCPTT_HSS according to the registration message, and the subscription according to the first user terminal.
  • the information is registered with the first user terminal; the registration message carries the address of the home domain when the first user terminal opens the account; the IBCF registers the address according to the address of the MCPTT Application domain carried in the first user terminal registration message.
  • the message is sent to the SP_IGW; the SP_IGW obtains the subscription information of the first user terminal from the MCPTT_HSS to complete the registration of the first user terminal, where the subscription information includes the authentication data and the user data of the first user terminal;
  • the SP_IGW sends a notification registration message to the MCPTT Application Server. After receiving the notification registration message sent by the SP_IGW, the MCPTT Application Server obtains the subscription information of the first user terminal from the MCPTT_HSS to complete the notification registration.
  • the cluster application server receives the call request of the first user terminal forwarded by the signaling access and the interworking gateway;
  • the above-mentioned SP_IGW receives the call request sent by the first user terminal, and the call request carries the service category. Identification information; the home domain of the first user terminal processes the call service, so the first user terminal sends a call request to the SP_IGW of the home MCPTT Application, and the SP_IGW forwards the call request to the MCPTT Application Server.
  • the SP_IGW When roaming to the IMS network for the service, the SP_IGW receives the call request sent by the first user terminal, where the call request carries the identification information of the service category; the home domain of the first user terminal processes the call service, and therefore the first user The terminal sends a call request to the home MCPTT
  • the SP_IGW of the application is also forwarded by the IMS, specifically, the P-CSCF that the first user terminal sends the call request, and when the user registers, the SP_IGW address of the IBCF and the home network is recorded, and the two are The address of the network element is placed in the Route header field, and the P-CSCF forwards the call request to the IBCF through the Route header field; the IBCF controls the IBGF to establish a bearer with the first user terminal; and the IBCF passes the Request carried in the call request.
  • - URI parsing the SP_IGW address in the call request, forwarding the call request to the home domain SP_IGW of the first user
  • the cluster application server After the cluster application server determines, according to the identifier information of the service category, that the call request is a group call service, the cluster application server sends a query message carrying the group identifier to the group management function module, so that the group management is performed.
  • the function module queries, according to the query message, the group information corresponding to the group identifier from the database;
  • the MCPTT Application Server After the MCPTT Application Server determines that the call request is a group call service according to the identifier information of the foregoing service category, the MCPTT Application Server sends a query message carrying the group identifier to the Group Management Function, so that the Group Management Function is configured according to the query message. Querying the group information corresponding to the group identifier from the database; the SP_IGW forwards the call request to the MCPTT Application Server for service processing, and the MCPTT Application Server performs service analysis according to the identification information of the service category. After the group call service is determined, the query message is sent to the group management function, where the query message carries the group identifier; the group management function receives the query message sent by the MCPTT Application Server, and queries the database according to the query message. And the group information corresponding to the group identifier, where the group information includes a group membership identifier list and/or a group area list.
  • the cluster application server After receiving the return message of the group information sent by the group management function module, the cluster application server sends an indication message to the media resource processing module.
  • the MCPTT Application Server After receiving the return message of the group information sent by the group management function, the MCPTT Application Server sends an indication message to the Media Processing Function, where the indication message is used to indicate that the Media Processing Function is the first user terminal and group information.
  • the other group members in the establishment establish a bearer.
  • the media resource processing module is configured by using the first user terminal and the group information. After the other group members establish the bearer, the cluster application server initiates a session establishment request to other group members in the group information, so that the first user terminal establishes a session with other group members in the group information.
  • the SP_IGW receives the MCPTT Application Server and initiates to other group members in the group information. a session establishment request; and forwarding the session establishment request to other group members in the group information, so that the first user terminal establishes a session with other group members in the group information.
  • the cluster application server after receiving the notification registration message sent by the signaling access and the interworking gateway, the cluster application server obtains the subscription information of the first user terminal from the home user server to complete the notification registration;
  • the network and the registration method corresponding to roaming to the IMS network for service provide guarantee for the stability of the call service.
  • the disclosed system, apparatus, and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

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Abstract

本发明实施例公开了一种集群通信系统、服务器及通信方法。本发明实施例中集群通信系统包括：集群应用服务器、归属用户服务器、信令接入和互通网关、群组管理功能模块、媒体资源处理模块；集群应用服务器用于接收信令接入和互通网关转发的第一用户终端的呼叫请求，在确定呼叫请求为组呼业务后，向群组管理功能模块发送查询消息；群组管理功能模块用于根据查询消息查询对应的群组信息；集群应用服务器还用于在接收到群组信息的返回消息后，指示媒体资源处理模块为第一用户终端及群组信息中的其他群组成员建立承载，并向群组信息中的其他群组成员发起会话建立请求。本发明实施例对MCPTT架构进行逻辑实体划分以及系统部署，以利于集群时延优化。

Description

一种集群通信系统、服务器及通信方法
本申请要求于2015年1月13日提交中国专利局、申请号为201510016227.X、发明名称为“一种集群通信系统、服务器及通信方法”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通信技术领域，特别涉及一种集群通信系统、服务器及通信方法。
背景技术
随着人们对宽带化业务的需求，如视频通话、图片等，集群通信正在向宽带化方向演进。LTE(Long Term Evolution，长期演进)是现今最先进的移动宽带系统，所以基于LTE的宽带集群成为未来发展的方向，因此为了满足宽带集群的需求，必须支持SIP(Session Initiation Protocol，会话初始协议)。
PoC(Push to Talk over Cellular，基于公共蜂窝网的一键通功能)是公众蜂窝移动通信网络中的PTT(Push to Talk，即按即说)业务。PTT又称“一键通”，源于集群通信技术。PTT实现了Walkie-Talkie(步话机)的移动语音业务，具有呼叫建立时间短，讲话才占用信道，接听只监听信道，接收方无需摘机即可随时接受呼叫信息。PoC是一种双向、即时和多方通信的方式，允许两个或者多个用户间通信。PoC业务类似于移动对讲业务，即用户按键与其他用户通话或广播到一个群组的所有参与者那里。在PoC系统架构中，通过基于IMS(IP Multimedia Subsystem，IP多媒体子系统)网络部署的SIP进行网络信令控制。
MCPTT(Mission Critical Push To Talk over LTE，基于LTE网的一键通功能关键任务)定义了LTE网络下一键通功能业务的实现标准。现有技术中对于该MCPTT架构的逻辑功能实体并没有进行划分，也没有说明该MCPTT架构的具体部署方案；且在上述基于IMS网络部署的SIP进行网络信令控制的架构中，网元较多，架构复杂。
发明内容
本发明提供了一种集群通信系统、服务器及通信方法，对MCPTT架构进行逻辑实体划分以及系统部署，以利于集群时延优化。
本发明第一方面提供了一种集群通信系统，包括：
集群应用服务器、归属用户服务器、信令接入和互通网关、群组管理功能模块、媒体资源处理模块；
所述信令接入和互通网关用于接收第一用户终端发送的呼叫请求，所述呼叫请求中携带有业务类别的标识信息；
所述集群应用服务器用于接收所述信令接入和互通网关转发的所述呼叫请求，且在根据所述业务类别的标识信息确定所述呼叫请求为组呼业务后，向所述群组管理功能模块发送查询消息，所述查询消息中携带有群组标识；
所述群组管理功能模块用于接收所述集群应用服务器发送的所述查询消息，并根据所述查询消息从数据库中查询与所述群组标识对应的群组信息，所述群组信息包括群组成员身份标识列表和/或群组区域列表；
所述集群应用服务器还用于在接收到所述群组管理功能模块发送的群组信息的返回消息后，向所述媒体资源处理模块发送指示消息；所述指示消息用于指示所述媒体资源处理模块为所述第一用户终端及群组信息中的其他群组成员建立承载；
所述集群应用服务器还用于在所述媒体资源处理模块为所述第一用户终端及所述群组信息中的其他群组成员建立承载后，向所述群组信息中的其他群组成员发起会话建立请求，以使所述第一用户终端与所述群组信息中的其他群组成员建立会话。
结合本发明的第一方面，在本发明第一方面的第一种实现方式中，
所述信令接入和互通网关还用于接收所述第一用户终端发送的注册消息，所述注册消息中携带有所述第一用户终端开户时的归属域的地址；
所述集群应用服务器还用于在接收到所述信令接入和互通网关发送的所述注册消息后，从所述归属用户服务器中获取所述第一用户终端的签约信息，并对所述第一用户终端进行注册。
结合本发明的第一方面，在本发明第一方面的第二种实现方式中，所述信 令接入和互通网关还用于接收所述第一用户终端发送的注册消息，并根据所述注册消息从所述归属用户服务器中获取所述第一用户终端的签约信息，以及根据所述第一用户终端的签约信息对所述第一用户终端进行注册；所述注册消息中携带有所述第一用户终端开户时的归属域的地址；
所述集群应用服务器还用于在接收到所述信令接入和互通网关发送的通知注册消息后，从所述归属用户服务器中获取所述第一用户终端的签约信息。
结合本发明的第一方面、或第一方面的第一种实现方式、或第一方面的第二种实现方式，在本发明第一方面的第三种实现方式中，所述集群通信系统通过所述媒体资源处理模块与演进分组系统EPS进行媒体平面的通信，且通过所述信令接入和互通网关与所述演进分组系统EPS进行信令平面的通信。
结合本发明的第一方面、或第一方面的第一种实现方式、或第一方面的第二种实现方式，在本发明第一方面的第四种实现方式中，所述集群通信系统的数量为至少两个，各个集群通信系统控制设定范围内的小区；其中，所述各个集群通信系统之间通过各自的所述媒体资源处理模块进行媒体平面的通信，且通过各自的所述信令接入和互通网关进行信令平面的通信。
结合本发明第一方面的第四种实现方式，在本发明第一方面的第五种实现方式中，所述各个集群通信系统之间通过IP多媒体子系统进行漫游通信，其中，所述各个集群通信系统中的媒体资源处理模块与所述IP多媒体子系统进行媒体平面的通信，所述各个集群通信系统中的信令接入和互通网关与所述IP多媒体子系统进行信令平面的通信。
结合本发明第一方面的第五种实现方式，在本发明第一方面的第六种实现方式中，所述信令接入和互通网关具体用于接收所述IP多媒体子系统转发的所述第一用户终端发送的注册消息，并将所述注册消息发送给所述集群应用服务器。
结合本发明第一方面的第五种实现方式，在本发明第一方面的第七种实现方式中，所述信令接入和互通网关具体用于接收所述IP多媒体子系统转发的所述第一用户终端发送的呼叫请求。
结合本发明的第一方面、或第一方面的第一种实现方式、或第一方面的第二种实现方式，在本发明第一方面的第八种实现方式中，所述信令接入和互通 网关还用于接收所述集群应用服务器向所述群组信息中的其他群组成员发起的会话建立请求，并将所述会话建立请求转发给所述群组信息中的其他群组成员，以使所述第一用户终端与所述群组信息中的其他群组成员建立会话。
本发明第二方面提供了一种集群应用服务器，包括：
接收单元，用于接收信令接入和互通网关转发的第一用户终端的呼叫请求，所述呼叫请求中携带有业务类别的标识信息；
第一发送单元，用于在根据所述业务类别的标识信息确定所述呼叫请求为组呼业务后，向群组管理功能模块发送携带有群组标识的查询消息，以使所述群组管理功能模块根据所述查询消息从数据库中查询与所述群组标识对应的群组信息；所述群组信息包括群组成员身份标识列表和/或群组区域列表；
第二发送单元，用于在接收到所述群组管理功能模块发送的群组信息的返回消息后，向媒体资源处理模块发送指示消息；所述指示消息用于指示所述媒体资源处理模块为所述第一用户终端及群组信息中的其他群组成员建立承载；
处理单元，用于在所述媒体资源处理模块为所述第一用户终端及所述群组信息中的其他群组成员建立承载后，向所述群组信息中的其他群组成员发起会话建立请求，以使所述第一用户终端与所述群组信息中的其他群组成员建立会话。
结合本发明的第二方面，在本发明第二方面的第一种实现方式中，所述服务器还包括：
获取单元，用于在接收到所述信令接入和互通网关发送的所述第一用户终端的注册消息后，从归属用户服务器中获取所述第一用户终端的签约信息；所述注册消息中携带有所述第一用户终端开户时的归属域的地址；
注册单元，用于在所述获取单元获取所述第一用户终端的签约信息后，对所述第一用户终端进行注册。
结合本发明的第二方面，在本发明第二方面的第二种实现方式中，所述服务器还包括：
获取单元，用于在接收到所述信令接入和互通网关发送的通知注册消息后，从归属用户服务器中获取所述第一用户终端的签约信息；所述通知注册消息为所述信令接入和互通网关对所述第一用户终端进行注册后发送的通知消 息。
结合本发明的第二方面、或第二方面的第一种实现方式、或第二方面的第二种实现方式，在本发明第二方面的第三种实现方式中，所述处理单元具体用于在所述媒体资源处理模块为所述第一用户终端及所述群组信息中的其他群组成员建立承载后，向所述信令接入和互通网关发送会话建立请求，并通过所述信令接入和互通网关将所述会话建立请求转发给所述群组信息中的其他群组成员，以使所述第一用户终端与所述群组信息中的其他群组成员建立会话。
本发明第三方面提供了一种集群通信方法，包括：
集群应用服务器接收信令接入和互通网关转发的第一用户终端的呼叫请求，所述呼叫请求中携带有业务类别的标识信息；
在所述集群应用服务器根据所述业务类别的标识信息确定所述呼叫请求为组呼业务后，所述集群应用服务器向群组管理功能模块发送携带有群组标识的查询消息，以使所述群组管理功能模块根据所述查询消息从数据库中查询与所述群组标识对应的群组信息；所述群组信息包括群组成员身份标识列表和/或群组区域列表；
所述集群应用服务器在接收到所述群组管理功能模块发送的群组信息的返回消息后，向媒体资源处理模块发送指示消息；所述指示消息用于指示所述媒体资源处理模块为所述第一用户终端及群组信息中的其他群组成员建立承载；
在所述媒体资源处理模块为所述第一用户终端及所述群组信息中的其他群组成员建立承载后，所述集群应用服务器向所述群组信息中的其他群组成员发起会话建立请求，以使所述第一用户终端与所述群组信息中的其他群组成员建立会话。
结合本发明的第三方面，在本发明第三方面的第一种实现方式中，所述集群应用服务器接收信令接入和互通网关转发的呼叫请求之前包括：
所述集群应用服务器在接收到所述信令接入和互通网关发送的所述第一用户终端的注册消息后，从归属用户服务器中获取所述第一用户终端的签约信息；所述注册消息中携带有所述第一用户终端开户时的归属域的地址；
所述集群应用服务器在获取所述第一用户终端的签约信息后，对所述第一 用户终端进行注册。
结合本发明的第三方面，在本发明第二方面的第二种实现方式中，所述集群应用服务器接收信令接入和互通网关转发的呼叫请求之前包括：
所述集群应用服务器在接收到所述信令接入和互通网关发送的通知注册消息后，从归属用户服务器中获取所述第一用户终端的签约信息；所述通知注册消息为所述信令接入和互通网关对所述第一用户终端进行注册后发送的通知消息。
结合本发明的第三方面、或第三方面的第一种实现方式、或第三方面的第二种实现方式，在本发明第三方面的第三种实现方式中，所述集群应用服务器向所述群组信息中的其他群组成员发起会话建立请求具体包括：
所述集群应用服务器向所述信令接入和互通网关发送会话建立请求，并通过所述信令接入和互通网关将所述会话建立请求转发给所述群组信息中的其他群组成员，以使所述第一用户终端与所述群组信息中的其他群组成员建立会话。
从以上技术方案可以看出，本发明实施例具有以下优点：所述集群应用服务器用于接收所述信令接入和互通网关转发的所述呼叫请求，且在根据所述业务类别的标识信息确定所述呼叫请求为组呼业务后，向所述群组管理功能模块发送查询消息；所述集群应用服务器还用于在接收到所述群组管理功能模块发送的群组信息的返回消息后，向所述媒体资源处理模块发送指示消息，以使所述媒体资源处理模块为所述第一用户终端及群组信息中的其他群组成员建立承载；且在所述媒体资源处理模块为所述第一用户终端及所述群组信息中的其他群组成员建立承载后，向所述群组信息中的其他群组成员发起会话建立请求，以使所述第一用户终端与所述群组信息中的其他群组成员建立会话。因此，通过上述集群通信系统的具体部署方案，减少了现有的集群通信网络架构中的网元实体，且逻辑架构简单，利于集群时延优化。
附图说明
图1为本发明实施例所提供的集群通信系统的一个结构示意图；
图2为本发明实施例所提供的集群通信系统的一个网络架构示意图；
图3为本发明实施例所提供的集群通信系统的另一网络架构示意图；
图4为本发明实施例所提供的集群通信系统的另一网络架构示意图；
图5为本发明实施例所提供的集群通信系统的另一网络架构示意图；
图6为本发明实施例所提供的集群通信系统的另一网络架构示意图；
图7为本发明实施例所提供的集群通信系统的另一网络架构示意图；
图8为本发明实施例所提供的集群应用服务器的一个结构示意图；
图9为本发明实施例所提供的集群应用服务器的另一结构示意图；
图10为本发明实施例所提供的集群应用服务器的另一结构示意图；
图11为本发明实施例所提供的集群应用服务器的另一结构示意图；
图12为本发明实施例所提供的集群通信方法的一个流程示意图；
图13为本发明实施例所提供的集群通信方法的另一流程示意图；
图14为本发明实施例所提供的集群通信方法的另一流程示意图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
应当理解，尽管在本发明实施例中可能采用术语第一、第二等来描述各个用户或终端，但用户或终端不应限于这些术语。这些术语仅用来将用户或终端彼此区分开。例如，在不脱离本发明实施例范围的情况下，第一用户也可以被称为第二用户，类似地，第二用户也可以被称为第一用户；同样的，第二用户也可以被称为第三用户等等，本发明实施例对此不做限制。
请参阅图1，为本发明实施例所提供的集群通信系统的一个结构示意图，该集群通信系统包括：
集群应用服务器101、归属用户服务器102、信令接入和互通网关103、群组管理功能模块104、媒体资源处理模块105；
上述信令接入和互通网关103用于接收第一用户终端发送的呼叫请求，上述呼叫请求中携带有业务类别的标识信息；
上述集群应用服务器101用于接收上述信令接入和互通网关103转发的上述呼叫请求，且在根据上述业务类别的标识信息确定上述呼叫请求为组呼业务后，向上述群组管理功能模块104发送查询消息，上述查询消息中携带有群组标识；
上述群组管理功能模块104用于接收上述集群应用服务器101发送的上述查询消息，并根据上述查询消息从数据库中查询与上述群组标识对应的群组信息，上述群组信息包括群组成员身份标识列表和/或群组区域列表；
上述集群应用服务器101还用于在接收到上述群组管理功能模块104发送的群组信息的返回消息后，向上述媒体资源处理模块105发送指示消息；上述指示消息用于指示上述媒体资源处理模块105为上述第一用户终端及群组信息中的其他群组成员建立承载；
上述集群应用服务器101还用于在上述媒体资源处理模块105为上述第一用户终端及上述群组信息中的其他群组成员建立承载后，向上述群组信息中的其他群组成员发起会话建立请求，以使上述第一用户终端与上述群组信息中的其他群组成员建立会话。
本发明实施例中，上述集群应用服务器101用于接收上述信令接入和互通网关103转发的上述呼叫请求，且在根据上述业务类别的标识信息确定上述呼叫请求为组呼业务后，向上述群组管理功能模块104发送查询消息；上述集群应用服务器101还用于在接收到上述群组管理功能模块104发送的群组信息的返回消息后，向上述媒体资源处理模块105发送指示消息，以使上述媒体资源处理模块105为上述第一用户终端及群组信息中的其他群组成员建立承载；且在上述媒体资源处理模块105为上述第一用户终端及上述群组信息中的其他群组成员建立承载后，向上述群组信息中的其他群组成员发起会话建立请求，以使上述第一用户终端与上述群组信息中的其他群组成员建立会话。因此，通过上述集群通信系统的具体部署方案，减少了现有的集群通信网络架构中的网元实体，且逻辑架构简单，利于集群时延优化。
可选的，上述信令接入和互通网关103还用于接收上述第一用户终端发送的注册消息，上述注册消息中携带有上述第一用户终端开户时的归属域的地址；
上述集群应用服务器101还用于在接收到上述信令接入和互通网关103发送的上述注册消息后，从上述归属用户服务器102中获取上述第一用户终端的签约信息，并对上述第一用户终端进行注册。
可选的，上述信令接入和互通网关103还用于接收上述第一用户终端发送的注册消息，并根据上述注册消息从上述归属用户服务器102中获取上述第一用户终端的签约信息，以及根据上述第一用户终端的签约信息对上述第一用户终端进行注册；上述注册消息中携带有上述第一用户终端开户时的归属域的地址；
上述集群应用服务器101还用于在接收到上述信令接入和互通网关103发送的通知注册消息后，从上述归属用户服务器102中获取上述第一用户终端的签约信息。
可选的，上述集群通信系统通过上述媒体资源处理模块105与演进分组系统EPS进行媒体平面的通信，且通过上述信令接入和互通网关103与上述演进分组系统EPS进行信令平面的通信。
可选的，上述集群通信系统的数量为至少两个，各个集群通信系统控制设定范围内的小区；其中，上述各个集群通信系统之间通过各自的上述媒体资源处理模块105进行媒体平面的通信，且通过各自的上述信令接入和互通网关103进行信令平面的通信。
例如，集群通信系统A与集群通信系统B之间的网络互通，包括集群通信系统A下的用户漫游到集群通信系统B下、集群通信系统A与集群通信系统B之间会话互通等，均通过各自的媒体资源处理模块105进行媒体平面的通信，且通过各自的信令接入和互通网关103进行信令平面的通信。
可选的，上述各个集群通信系统之间通过IP多媒体子系统进行漫游通信，其中，上述各个集群通信系统中的媒体资源处理模块105与上述IP多媒体子系统进行媒体平面的通信，上述各个集群通信系统中的信令接入和互通网关103与上述IP多媒体子系统进行信令平面的通信。
例如，集群通信系统A与集群通信系统B之间的网络互通，但是二者之间没有直接通路。集群通信系统A下的用户漫游到集群通信系统B网络下，而集群通信系统A与集群通信系统B网络之间没有直接通路。而集群通信系 统B与IP多媒体子系统之间有通路，集群通信系统A与IP多媒体子系统之间有通路，则可以通过IP多媒体子系统网络作为中转网络；或直接漫游到IP多媒体系统网络下，通过媒体资源处理模块105与上述IP多媒体子系统进行媒体平面的通信，通过信令接入和互通网关103与上述IP多媒体子系统进行信令平面的通信。
可选的，上述信令接入和互通网关103具体用于接收上述IP多媒体子系统转发的上述第一用户终端发送的注册消息，并将上述注册消息发送给上述集群应用服务器101。
可选的，上述信令接入和互通网关103具体用于接收上述IP多媒体子系统转发的上述第一用户终端发送的呼叫请求。
可选的，上述信令接入和互通网关103还用于接收上述集群应用服务器101向上述第一用户终端对应的群组信息中的其他群组成员发起的会话建立请求；并将上述会话建立请求转发给上述群组信息中的其他群组成员，以使上述第一用户终端与上述群组信息中的其他群组成员建立会话。
基于上述实施例中的集群通信系统，现结合图2对该集群通信系统在实际应用场景中的系统架构进行相关说明。
如图2所示，首先对图示中各功能模块进行定义，其中：
MCPTT Application Server为本发明中的集群应用服务器，具体功能如下：
注册功能和鉴权管理，其中注册功能包括：用户注册(分为初始注册和刷新注册)、用户注销、强制注销和超时注销；
会话管理，针对与MCPTT业务，无论组呼还是私密呼叫都是要在MCPTT Server进行处理；
QoS(Quality of Service，服务质量)保障，给PTT业务提供Qos保障。因为信令接入和互通网关由于不理解MCPTT用户和群组的属性，无法承担MCPTT的QoS和优先级控制中心角色。MCPTT Application Server能时刻感知用户(UE)和群组的静态和动态属性变化，同时也承担着MCPTT优先级和QoS控制中心的角色，Rx接口面向MCPTT Application Server更符合MCPTT架构的功能划分；
提供MRFC(Multimedia Resource Function Controller，媒体资源功能控制 器)功能，控制Media Processing Function进行媒体处理。MCPTT Application Server与Media Processing Function之间为Mc接口；
这样做的好处是媒体面与控制面彻底分离，Media Processing Function仅仅负责媒体面的处理，所有指令均由MCPTT Application Server下发。
MCPTT_HSS(MCPTT Home Subscriber Server)为本发明中的归属用户服务器，具体功能如下：
与HSS(Home Subscriber Server，归属用户服务器)类似，是保存MCPTT用户的签约信息，包括基本标识、位置信息等集中综合数据库；主要存储信息包括MCPTT用户标识(包括公共及私有标识)、号码和地址信息；MCPTT用户安全上下文：用户网络接入认证的密钥信息；MCPTT_HSS支持MCPTT用户的注册，并且存储MCPTT用户的位置信息；
存储UE的信息，比如IMEI、IMSI等。
Group Management Function为本发明中的群组管理功能模块，负责群组信息的存储、管理。
Media Processing Function为本发明中的媒体资源处理模块，具体功能如下：
MRFP(Media Resource Function Process，媒体资源功能处理器)的所有功能，包括执行所有于媒体相关的功能，如播放媒体和混合媒体；
与其他网络媒体面互通的功能。
SP_IGW(Signalling Proxy and Interworking GateWay)为本发明中的信令接入和互通网关，具体功能如下：
接入侧和MCPTT Application Sever之间的SIP信令路由；
提供用户的隐私管理身份隐藏和信任域安全保证；
为SIP会话控制提供路由功能；
流控管理；
与其他网络互连互通，如其他基于SP_IGW的MCPTT Application系统、IMS系统、PSTN(Public Switched Telephone Network，公用电话交换网)系统等。
其中，SP_IGW是MCPTT终端和MCPTT网络之间的第一个连接点(在信令平面)，从SIP的角度来看，SP_IGW是作为一个出站/入站SIP代理服务器， 这说明MCPTT终端发出的或者MCPTT终端接收的所有SIP请求都要经过SP_IGW。SP_IGW将SIP请求和响应沿着既定的方向继续传送(传向MCPTT终端或者传向MCPTT网络)；从http的角度，SP_IGW时作为一个出站/入站HTTP代理服务器,这说明MCPTT终端发出的或者MCPTT终端接收的所有HTTP请求都要经过SP_IGW。SP_IGW将HTTP请求和响应沿着既定的方向继续传送(传向MCPTT终端或者传向MCPTT网络)；
SP_IGW包含流控管理功能，通过配置流控策略对信令进行流控；
SP_IGW是必不可少的互通网关，负责连接所有外部网络的信令平面，当MCPTT网络需要与外部网络互通时，选择合适的网络，并完成协议转换，比如可以将SIP协议转换成ISUP或者BICC(ISUP和BICC都是电路交换网络中的通话控制协议)，负责3GPP SIP信令与IETF SIP、H.323信令之间的互通等。
SP_IGW还负责管理Media Processing Function资源，SP_IGW与Media Processing Function之间所应用的接口是Mc口，协议是H.248。
Presence Server为状态呈现服务器，用于获取用户的状态信息，具体功能如下：
接收MCPTT用户发布的状态信息，并存储；
接受MCPTT用户的订阅，通知状态信息；
接受MCPTT用户的状态获取请求，推送状态信息；
管理Xml(Extensible Mark-up Language，扩展标记语言)文件，如联系人列表，MCPTT群组列表，支持如下操作：创建、修改、恢复和删除。
支持订阅，以及当存储文件发生变化时通知MCPTT用户；
BM-SC(Broadcast Multicast Service Center)表示广播多播服务中心；
EPS(Evolved Packet System)表示演进分组系统；
IMS Core表示IP多媒体系统；
其中，各功能模块之间通过接口进行连接，接口功能说明如下：
GMF：GMF接口位于MCPTT Application Server与Group Management Function之间，用于MCPTT组呼以及私密呼叫流程中群组信息的传递。
Mc：Mc接口位于MCPTT Application Server与Media Processing Funcion之间，Mc位于SP_IGW与Media Processing Funcion之间。该接口用于控制 Media Processing Funcion上的媒体资源，以及特殊资源的调用。
MCP-1：位于MCPTT Application Server与SP_IGW之间，用于MCPTT业务触发，并将会话向MCPTT Application Server服务器发送以完成业务逻辑的最终处理。
Cx/Sh：Cx/Sh接口位于MCPTT Application Server与MCPTT_HSS之间。其中，Cx接口的作用是：MCPTT Application Server从MCPTT_HSS中获取有关漫游授权的相关信息和MCPTT用户接入鉴权所需的安全参数；Sh接口的作用是：MCPTT Application Server从MCPTT_HSS中获取用户数据。
GS：GS接口位于SP_IGW与Group Management Function之间，用于传递用户上报的加入/退出/创建群组的信息。
SS：SS接口位于两个MCPTT Application网络互通时，两个网络的SP_IGW之间的接口。用于两个网络互通时，将信令从一个MCPTT Application网络转发到另一个MCPTT Application网络。
SI：SI接口位于MCPTT Application网络与IMS网络互通时，SP_IGW与IBCF之间的接口。用于MCPTT Application网络与IMS网络互通时，将信令MCPTT Application网络转发到IMS网络或从IMS网络转发到MCPTT Application网络。
PM：PM接口位于Presence Server和MCPTT Application Server之间，用来获取用户状态。
PS：PS接口位于Presence Server和SP_IGW之间，用于传递MCPTT UE和Presence Server交互的信令，以及Presence Server获取其他网络用户状态的信令。
基于上述集群通信系统的系统架构，现对不同场景下该集群通信系统的具体功能作相关说明。
一、用户在基于该系统架构的本地网络中进行业务时，如图3所示，该集群通信系统中，
在注册鉴权流程中，上述SP_IGW用于接收上述第一用户终端UE_1发送的注册消息，上述注册消息中携带有上述第一用户终端开户时的归属域的地址；
上述MCPTT Application Server用于在接收到上述SP_IGW发送的上述注册消息后，从上述MCPTT_HSS中获取上述第一用户终端的签约信息，并对上述第一用户终端进行注册；
需要说明的是，上述注册消息中携带有UE_1开户时的MCPTT Application Server域的地址；上述签约信息中包含上述第一用户终端的鉴权数据和用户数据；MCPTT Application Server完成上述第一用户终端的注册。
在组呼流程中，上述SP_IGW用于接收第一用户终端发送的呼叫请求，上述呼叫请求中携带有业务类别的标识信息；
需要说明的是，该第一用户终端的归属域处理呼叫业务，因此该第一用户终端要将呼叫请求发送到归属MCPTT Application的SP_IGW。
上述MCPTT Application Server用于接收上述SP_IGW转发的上述呼叫请求，且在根据上述业务类别的标识信息确定上述呼叫请求为组呼业务后，向上述Group Management Function发送查询消息，该查询消息中携带有群组标识；
需要说明的是，上述SP_IGW将呼叫请求转发给MCPTT Application Server进行业务处理，MCPTT Application Server进行业务分析，根据上述业务类别的标识信息，在确定为组呼业务后，向上述Group Management Function发送查询消息，该查询消息中携带有群组标识。
上述Group Management Function用于接收上述MCPTT Application Server发送的上述查询消息，并根据上述查询消息从数据库中查询与上述群组标识对应的群组信息，上述群组信息包括群组成员身份标识列表和/或群组区域列表；
上述MCPTT Application Server还用于在接收到上述Group Management Function发送的群组信息的返回消息后，向上述Media Processing Function发送指示消息；上述指示消息用于指示上述Media Processing Function为上述第一用户终端及群组信息中的其他群组成员建立承载；
上述SP_IGW还用于接收上述MCPTT Application Server向上述群组信息中的其他群组成员发起的会话建立请求，并将上述会话建立请求转发给上述群组信息中的其他群组成员，以使上述第一用户终端与上述群组信息中的其他群组成员建立会话。
需要说明的是，在上述MCPTT Application Server指示上述Media  Processing Function为上述第一用户终端及上述群组信息中的其他群组成员建立承载后，上述MCPTT Application Server给上述群组信息中的其他群组成员发起会话，上述SP_IGW转发MCPTT Application Server的会话建立请求给上述群组信息中的其他群组成员，以使上述第一用户终端与上述群组信息中的其他群组成员建立会话。
二、用户漫游到IMS网络下时，需通过IMS网络接入MCPTT Application网络中，如图4所示，该集群通信系统中，
在注册鉴权流程中，上述SP_IGW用于接收上述第一用户终端UE_1发送的注册消息，上述注册消息中携带有上述第一用户终端开户时的归属域的地址；
上述MCPTT Application Server用于在接收到上述SP_IGW发送的上述注册消息后，从上述MCPTT_HSS中获取上述第一用户终端的签约信息，并对上述第一用户终端进行注册；
需要说明的是，上述注册消息中携带有UE_1开户时的MCPTT Application Server域的地址；该注册消息由IMS转发至上述SP_IGW，具体为UE将该注册消息发送到IMS中的P-CSCF(Proxy-CSCF，代理呼叫会话控制功能)，P-CSCF可以通过用户标识等信息，得知用户非本网内用户，对于MCPTT Application的专网用户，将消息发送至IMS中的IBCF(Interconnection Border Control Function，互连边界控制功能)处理；IBCF根据上述注册消息中携带的MCPTT Application Server域的地址，将该注册消息发送到上述SP_IGW；
上述签约信息中包含上述第一用户终端的鉴权数据和用户数据；MCPTT Application Server完成上述第一用户终端的注册。
在组呼流程中，上述SP_IGW用于接收第一用户终端发送的呼叫请求，上述呼叫请求中携带有业务类别的标识信息；
需要说明的是，该第一用户终端的归属域处理呼叫业务，因此该第一用户终端要将呼叫请求发送到归属MCPTT Application的SP_IGW；此时，也由IMS进行转发，具体为该第一用户终端将该呼叫请求发送给P-CSCF，用户注册时，记录了IBCF与归属网络的SP_IGW地址，并将这两个网元的地址放在Route(路由)头域中，P-CSCF通过Route头域将该呼叫请求转发给IBCF；IBCF控制IBGF (Interconnection border gateway function，互连边界网关功能)建立与该第一用户终端之间的承载；IBCF通过该呼叫请求中携带的Request-URI(Uniform Resource Identifier，通用资源标识符)，解析出该呼叫请求中的SP_IGW地址，将该呼叫请求转发给上述第一用户终端的归属域SP_IGW。
上述MCPTT Application Server用于接收上述SP_IGW转发的上述呼叫请求，且在根据上述业务类别的标识信息确定上述呼叫请求为组呼业务后，向上述Group Management Function发送查询消息，该查询消息中携带有群组标识；
需要说明的是，上述SP_IGW将呼叫请求转发给MCPTT Application Server进行业务处理，MCPTT Application Server进行业务分析，根据上述业务类别的标识信息，在确定为组呼业务后，向上述Group Management Function发送查询消息，该查询消息中携带有群组标识；
上述Group Management Function用于接收上述MCPTT Application Server发送的上述查询消息，并根据上述查询消息从数据库中查询与上述群组标识对应的群组信息，上述群组信息包括群组成员身份标识列表和/或群组区域列表；
上述MCPTT Application Server还用于在接收到上述Group Management Function发送的群组信息的返回消息后，向上述Media Processing Function发送指示消息；上述指示消息用于指示上述Media Processing Function为上述第一用户终端及群组信息中的其他群组成员建立承载；
上述SP_IGW还用于接收上述MCPTT Application Server向上述群组信息中的其他群组成员发起的会话建立请求，并将上述会话建立请求转发给上述群组信息中的其他群组成员，以使上述第一用户终端与上述群组信息中的其他群组成员建立会话。
需要说明的是，在上述MCPTT Application Server指示上述Media Processing Function为上述第一用户终端及上述群组信息中的其他群组成员建立承载后，上述MCPTT Application Server给上述群组信息中的其他群组成员发起会话，上述SP_IGW转发MCPTT Application Server的会话建立请求给上述群组信息中的其他群组成员，以使上述第一用户终端与上述群组信息中的其他群组成员建立会话。
三、用户在上述集群通信系统之间漫游通信，即在MCPTT Application_A 网络下的用户漫游到MCPTT Application_B网络，如图5所示，该集群通信系统中，
在组呼流程中，上述SP_IGW用于接收第一用户终端发送的呼叫请求，上述呼叫请求中携带有业务类别的标识信息；
需要说明的是，该第一用户终端UE_1已经注册到了归属域，因此UE_1发起呼叫时携带了归属MCPTT Application的地址(其实也就是归属域的SP_IGW的地址)。UE_1将组呼会话建立消息发送到拜访域的SP_IGW，此IP地址在注册成功后，被UE_1记录为下一跳的地址；拜访域的SP_IGW控制拜访域的Media Processing Function建立与UE_1之间的承载；
拜访域中的SP_IGW通过该呼叫请求中携带的拜访域的地址，将该呼叫请求转发给UE_1归属域的SP_IGW；
上述MCPTT Application Server用于接收上述归属域的SP_IGW转发的上述呼叫请求，且在根据上述业务类别的标识信息确定上述呼叫请求为组呼业务后，向上述Group Management Function发送查询消息，上述查询消息中携带有群组标识；
需要说明的是，上述归属域的SP_IGW将呼叫请求转发给MCPTT Application Server进行业务处理，MCPTT Application Server进行业务分析，根据上述业务类别的标识信息，在确定为组呼业务后，向上述Group Management Function发送查询消息，该查询消息中携带有群组标识。
上述Group Management Function用于接收上述MCPTT Application Server发送的上述查询消息，并根据上述查询消息从数据库中查询与上述群组标识对应的群组信息，上述群组信息包括群组成员身份标识列表和/或群组区域列表；
上述MCPTT Application Server还用于在接收到上述Group Management Function发送的群组信息的返回消息后，向上述Media Processing Function发送指示消息；上述指示消息用于指示上述Media Processing Function为上述第一用户终端及群组信息中的其他群组成员建立承载；
上述归属域的SP_IGW还用于接收上述MCPTT Application Server向上述群组信息中的其他群组成员发起的会话建立请求，并将上述会话建立请求转发给上述群组信息中的其他群组成员，以使上述第一用户终端与上述群组信息中 的其他群组成员建立会话。
需要说明的是，在上述MCPTT Application Server指示上述Media Processing Function为上述第一用户终端及上述群组信息中的其他群组成员建立承载后，上述MCPTT Application Server给上述群组信息中的其他群组成员发起会话，上述归属域的SP_IGW转发MCPTT Application Server的会话建立请求给上述群组信息中的其他群组成员，以使上述第一用户终端与上述群组信息中的其他群组成员建立会话。
基于上述图2所示的系统架构，在本发明实施例中，SP_IGW可以作为注册服务器，此时，该系统架构与上述图2的不同之处在于，SP_IGW与MCPTT_HSS之间增加了信令交互，接口为Cx/Sh(可参见上述对于该接口的功能定义)；该系统结构下，对于用户注册鉴权与上述实施例有所差异，具体为：
一、用户在基于该系统架构的本地网络中进行注册
上述SP_IGW用于接收上述第一用户终端发送的注册消息，并根据上述注册消息从上述MCPTT_HSS中获取上述第一用户终端的签约信息，以及根据上述第一用户终端的签约信息对上述第一用户终端进行注册；上述注册消息中携带有上述第一用户终端开户时的归属域的地址；
上述MCPTT Application Server用于在接收到上述SP_IGW发送的通知注册消息后，从上述MCPTT_HSS中获取上述第一用户终端的签约信息；
需要说明的是，该第一用户终端携带SP_IGW域的地址，向SP_IGW发送注册消息；SP_IGW从MCPTT_HSS中获取上述第一用户终端的签约信息以完成该第一用户终端的注册，上述签约信息中包含上述第一用户终端的鉴权数据和用户数据；完成注册后，SP_IGW向MCPTT Application Server发送通知注册消息；MCPTT Application Server在接收到上述SP_IGW发送的通知注册消息后从MCPTT_HSS中获取上述第一用户终端的签约信息以完成通知注册。
二、用户在基于该系统架构的IMS网络中进行注册
上述SP_IGW用于接收上述第一用户终端发送的注册消息，并根据上述注册消息从上述MCPTT_HSS中获取上述第一用户终端的签约信息，以及根据上述第一用户终端的签约信息对上述第一用户终端进行注册；上述注册消息中携带有上述第一用户终端开户时的归属域的地址；
上述MCPTT Application Server用于在接收到上述SP_IGW发送的通知注册消息后，从上述MCPTT_HSS中获取上述第一用户终端的签约信息；
需要说明的是，IBCF根据该第一用户终端注册消息中携带的MCPTT Application域的地址，将该注册消息发送到SP_IGW；SP_IGW从MCPTT_HSS中获取上述第一用户终端的签约信息以完成该第一用户终端的注册，上述签约信息中包含上述第一用户终端的鉴权数据和用户数据；完成注册后，SP_IGW向MCPTT Application Server发送通知注册消息；MCPTT Application Server在接收到上述SP_IGW发送的通知注册消息后从MCPTT_HSS中获取上述第一用户终端的签约信息以完成通知注册。
需要说明的是，该系统架构中，用户在进行组呼业务时，可参见上述实施例图2至图5，此处不作赘述，对于图2中描述的该SP_IGW功能定义，此处该SP_IGW添加了注册功能，具体包括注册功能和鉴权管理，其中注册功能包括用户注册(分为初始注册和刷新注册)、用户注销和超时注销；上述MCPTT Application Server中的注册功能也有所变化，具体包括：SP_IGW通知注册、SP_IGW通知注销、强制注销。
基于上述图2所示的系统架构，上述实施例中的SP_IGW可拆分成两个独立的功能实体：Signalling Proxy(信令代理模块)和Interworking GateWay(互通网关模块)。
一、Interworking GateWay与外部网络进行互连互通
如图6所示，图中各模块之间通过设置接口进行信令交互，接口功能可参见上述实施例图2，此处不再赘述，Signalling Proxy的功能如下：
信令代理，MCPTT Applications入站/出站点。
Interworking GateWay的功能如下：
与P25等窄带系统互连互通；
与IMS网络，跨企业、跨机构的MCPTT网络互连互通。
Signalling Proxy不作为注册服务器时，在用户从本地EPS系统接入时，在注册鉴权流程中，作用同实施例图2中的SP_IGW；组呼流程中，作用同实施例图2中的SP_IGW；
Signalling Proxy不作为注册服务器时，在用户漫游到IMS时，在注册鉴权 流程中，IBCF根据用户注册消息中携带的MCPTT Application域的地址，将注册消息发送给Interworking GateWay，Interworking Gateway直接将注册消息发送给MCPTT Application Server，后续同实施例图4中通过IMS网络的注册流程；在组呼流程中，IBCF通过呼叫请求中携带的Request-URI，将该呼叫请求转发给UE-1归属域的Interworking Gateway，Interworking Gateway分析是组呼业务，将该呼叫请求转发给MCPTT Application Server处理，若某群组成员处于P25/PSTN(窄带系统)或IMS系统中，MCPTT Application Server需要指示Interworking GateWay去建立处于P25/PSTN或IMS系统的组呼成员，Interworking GateWay还要指示媒体处理模块分配媒体资源，进行Codec(编译码)变换等操作，后续同实施例图4中通过IMS的组呼流程。
Signalling Proxy作为注册服务器时，在用户从本地EPS系统接入时，在注册鉴权流程中，作用同上述实施例中SP_IGW作为注册服务器的注册流程；组呼流程中，作用同上述实施例中SP_IGW作为注册服务器的组呼流程；
Signalling Proxy作为注册服务器时，在用户漫游到IMS时，在注册鉴权流程中，IBCF根据用户注册消息中携带的MCPTT Application域的地址，将该注册消息发送给Interworking GateWay，Interworking Gateway将该注册消息转发给Signalling Proxy，后续流程同实施例SP_IGW作为注册服务器时通过IMS网络的注册流程；在组呼流程中，IBCF通过呼叫请求中携带的Request-URI，将该呼叫请求转发给UE-1归属域的Interworking Gateway，Interworking Gateway分析是组呼业务，将该呼叫请求转发给MCPTT Application Server处理，若某群组成员处于P25/PSTN或IMS系统中，MCPTT Application Server需要指示Interworking GateWay去建立处于P25/PSTN或IMS系统的组呼成员，Interworking GateWay还要指示媒体处理模块分配媒体资源，进行Codec变换等操作，后续同实施例SP_IGW作为注册服务器时通过IMS的组呼流程。
二、Interworking Gateway与CS(circuit switching，电路交换)网络(如PSTN/Tetra(Terrestial Trunked Radio，陆地集群无线电系统)等)进行互连互通，Signalling Proxy与PS(packet switching，分组交换)网络(如IMS/MCPTT网络等)进行互连互通
如图7所示，图中各模块之间通过设置接口进行信令交互，接口功能可参 见上述实施例图2，此处不再赘述，Signalling Proxy的功能如下：
信令代理，MCPTT Applications入站/出站点；
与IMS网络，跨企业、跨机构的MCPTT网络互连互通。
Interworking GateWay的功能如下：
与P25等窄带系统互连互通。
Signalling Proxy不作为注册服务器时，在用户从本地EPS系统接入时，在注册鉴权流程中，作用同实施例图2中的SP_IGW；组呼流程中，作用同实施例图2中的SP_IGW；
Signalling Proxy不作为注册服务器时，在用户漫游到IMS时，在注册鉴权流程中，IBCF根据用户注册消息中携带的MCPTT Application域的地址，将注册消息发送给Signalling Proxy，Signalling Proxy直接将注册消息发送给MCPTT Application Server，后续同实施例图4中通过IMS网络的注册流程；在组呼流程中，IBCF通过呼叫请求中携带的Request-URI，将该呼叫请求转发给UE-1归属域的Signalling Proxy，Signalling Proxy分析是组呼业务，将该呼叫请求转发给MCPTT Application Server处理，若某群组成员A处于P25/PSTN系统中，MCPTT Application Server需要指示Interworking GateWay去建立群组成员A，Interworking GateWay还要指示媒体处理模块分配媒体资源，进行Codec变换，建立与窄带系统媒体网关之间的媒体面连接；若群组成员B处于IMS网络下，MCPTT Application Server需要指示Signalling Proxy去建立群组成员B，Signalling Proxy要指示媒体处理模块分配媒体资源，Codec变换，建立与IBGF之间的承载，后续同实施例图4中通过IMS的组呼流程。
Signalling Proxy作为注册服务器时，在用户从本地EPS系统接入时，在注册鉴权流程中，作用同上述实施例中SP_IGW作为注册服务器的注册流程；组呼流程中，作用同上述实施例中SP_IGW作为注册服务器的组呼流程；
Signalling Proxy作为注册服务器时，在用户漫游到IMS时，在注册鉴权流程中，IBCF根据用户注册消息中携带的MCPTT Application域的地址，将该注册消息发送给Signalling Proxy，后续流程同上述实施例中SP_IGW作为注册服务器通过IMS网络的注册流程；
组呼流程不受Signalling Proxy是否作为注册服务器影响，作用和描述同上 述实施例中SP_IGW作为注册服务器通过IMS网络的组呼流程。
上述介绍的两种互通方式中，也可根据实际情况(比如同一企业内部的两个系统间互通采用Signalling Proxy互通，不同企业的MCPTT系统间使用Interworking GateWay互通)，将上述两种情况进行融合，达到部署的目的。与同系统互通以及与异系统互通分开实现和部署。
以上对本发明中的集群通信系统进行了相关描述，下面对本发明中所提供的集群应用服务器进行相关说明。
请参阅图8，为本发明实施例所提供的集群应用服务器的一个结构示意图，该集群应用服务器包括：
接收单元801，用于接收信令接入和互通网关转发的第一用户终端的呼叫请求，上述呼叫请求中携带有业务类别的标识信息；
第一发送单元802，用于在根据上述业务类别的标识信息确定上述呼叫请求为组呼业务后，向群组管理功能模块发送携带有群组标识的查询消息，以使上述群组管理功能模块根据上述查询消息从数据库中查询与上述群组标识对应的群组信息；上述群组信息包括群组成员身份标识列表和/或群组区域列表；
第二发送单元803，用于在接收到上述群组管理功能模块发送的群组信息的返回消息后，向媒体资源处理模块发送指示消息；上述指示消息用于指示上述媒体资源处理模块为上述第一用户终端及群组信息中的其他群组成员建立承载；
处理单元804，用于在上述媒体资源处理模块为上述第一用户终端及上述群组信息中的其他群组成员建立承载后，向上述群组信息中的其他群组成员发起会话建立请求，以使上述第一用户终端与上述群组信息中的其他群组成员建立会话。
本发明实施例中，上述接收单元801用于接收信令接入和互通网关转发的上述呼叫请求；上述第一发送单元802用于在根据上述业务类别的标识信息确定上述呼叫请求为组呼业务后，向上述群组管理功能模块发送查询消息，以使上述群组管理功能模块根据上述查询消息从数据库中查询与上述群组标识对应的群组信息；上述第二发送单元803用于在接收到上述群组管理功能模块发送的群组信息的返回消息后，向媒体资源处理模块发送指示消息；上述处理单 元804用于在上述媒体资源处理模块为上述第一用户终端及上述群组信息中的其他群组成员建立承载后，向上述群组信息中的其他群组成员发起会话建立请求，以使上述第一用户终端与上述群组信息中的其他群组成员建立会话。因此，通过上述集群通信系统的具体部署方案，减少了现有的集群通信网络架构中的网元实体，且逻辑架构简单，利于集群时延优化。
基于上述实施例中的集群应用服务器，本发明实施例中，在进行呼叫业务之前，对该第一用户终端进行注册的一种实现方式如下，可选的，请参阅图9，上述服务器还包括：
获取单元901，用于在接收到上述信令接入和互通网关发送的上述第一用户终端的注册消息后，从归属用户服务器中获取上述第一用户终端的签约信息；上述注册消息中携带有上述第一用户终端开户时的归属域的地址；
注册单元902，用于在上述获取单元901获取上述第一用户终端的签约信息后，对上述第一用户终端进行注册。
本发明实施例中，获取单元901用于在接收到上述信令接入和互通网关发送上述第一用户终端的注册消息后，从归属用户服务器中获取上述第一用户终端的签约信息；注册单元902用于在上述获取单元901获取上述第一用户终端的签约信息后，对上述第一用户终端进行注册。且通过在本地网络以及漫游到IMS网络进行业务时对应的注册方式，给呼叫业务进行的稳定性提供了保障。
基于上述实施例中的集群应用服务器，在进行呼叫业务之前，对该第一用户终端进行注册的另一种实现方式如下，可选的，请参阅图10，上述服务器还包括：
获取单元1001，用于在接收到上述信令接入和互通网关发送的通知注册消息后，从归属用户服务器中获取上述第一用户终端的签约信息；上述通知注册消息为上述信令接入和互通网关对上述第一用户终端进行注册后发送的通知消息。
本发明实施例中，获取单元1001用于在接收到上述信令接入和互通网关发送的通知注册消息后，从归属用户服务器中获取上述第一用户终端的签约信息；上述通知注册消息为上述信令接入和互通网关对上述第一用户终端进行注册后发送的通知消息。且通过在本地网络以及漫游到IMS网络进行业务时对应 的注册方式，给呼叫业务进行的稳定性提供了保障。
基于上述实施例中的集群应用服务器，进一步的，上述处理单元804具体用于在上述媒体资源处理模块为上述第一用户终端及上述群组信息中的其他群组成员建立承载后，向上述信令接入和互通网关发送会话建立请求，并通过上述信令接入和互通网关将上述会话建立请求转发给上述群组信息中的其他群组成员，以使上述第一用户终端与上述群组信息中的其他群组成员建立会话。
图8至图10所示的实施例从功能单元的角度对集群应用服务器的具体结构进行了说明，以下结合图11所示的实施例从硬件角度对集群应用服务器的具体结构进行说明：
如图11所示，该集群应用服务器包括：接收器1101、发射器1102、处理器1103和存储器1104。
本发明实施例涉及的用户设备可以具有比图11所示出的更多或更少的部件，可以组合两个或更多个部件，或者可以具有不同的部件配置或设置，各个部件可以在包括一个或多个信号处理和/或专用集成电路在内的硬件、软件或硬件和软件的组合实现。
上述接收器1101用于执行如下操作：
接收信令接入和互通网关转发的第一用户终端的呼叫请求，上述呼叫请求中携带有业务类别的标识信息；
上述处理器1103用于执行如下操作：
在根据上述业务类别的标识信息确定上述呼叫请求为组呼业务后，向群组管理功能模块发送携带有群组标识的查询消息，以使上述群组管理功能模块根据上述查询消息从数据库中查询与上述群组标识对应的群组信息；上述群组信息包括群组成员身份标识列表和/或群组区域列表；
在接收到上述群组管理功能模块发送的群组信息的返回消息后，向媒体资源处理模块发送指示消息；上述指示消息用于指示上述媒体资源处理模块为上述第一用户终端及群组信息中的其他群组成员建立承载；
在上述媒体资源处理模块为上述第一用户终端及上述群组信息中的其他群组成员建立承载后，向上述群组信息中的其他群组成员发起会话建立请求， 以使上述第一用户终端与上述群组信息中的其他群组成员建立会话。
上述处理器1103还用于执行如下操作：
在接收到上述信令接入和互通网关发送的上述第一用户终端的注册消息后，从归属用户服务器中获取上述第一用户终端的签约信息；上述注册消息中携带有上述第一用户终端开户时的归属域的地址；
在上述获取单元901获取上述第一用户终端的签约信息后，对上述第一用户终端进行注册。
上述处理器1103还用于执行如下操作：
在接收到上述信令接入和互通网关发送的通知注册消息后，从归属用户服务器中获取上述第一用户终端的签约信息；上述通知注册消息为上述信令接入和互通网关对上述第一用户终端进行注册后发送的通知消息。
上述处理器1103具体用于执行如下操作：
在上述媒体资源处理模块为上述第一用户终端及上述群组信息中的其他群组成员建立承载后，向上述信令接入和互通网关发送会话建立请求，并通过上述信令接入和互通网关将上述会话建立请求转发给上述群组信息中的其他群组成员，以使上述第一用户终端与上述群组信息中的其他群组成员建立会话。
本发明实施例中，上述接收器1101用于接收信令接入和互通网关转发的上述呼叫请求；上述处理器1103用于在根据上述业务类别的标识信息确定上述呼叫请求为组呼业务后，向上述群组管理功能模块发送查询消息，以使上述群组管理功能模块根据上述查询消息从数据库中查询与上述群组标识对应的群组信息；且在接收到上述群组管理功能模块发送的群组信息的返回消息后，向媒体资源处理模块发送指示消息，以使上述媒体资源处理模块为上述第一用户终端及群组信息中的其他群组成员建立承载；以及在上述媒体资源处理模块为上述第一用户终端及上述群组信息中的其他群组成员建立承载后，向上述群组信息中的其他群组成员发起会话建立请求，以使上述第一用户终端与上述群组信息中的其他群组成员建立会话。因此，通过上述集群应用服务器的具体功能，减少了现有的集群通信网络架构中的网元实体间的信令交互，且逻辑架构简单，利于集群时延优化。为便于更好的实施本发明实施例的集群应用服务器， 下面还提供用于用于配合上述集群应用服务器的集群通信方法。
请参阅图12，本发明所提供的集群通信方法的一个实施例包括：
1201、集群应用服务器接收信令接入和互通网关转发的第一用户终端的呼叫请求；
MCPTT Application Server接收SP_IGW转发的第一用户终端的呼叫请求，需要说明的是，SP_IGW接收第一用户终端发送的呼叫请求，上述呼叫请求中携带有业务类别的标识信息；该第一用户终端的归属域处理呼叫业务，因此该第一用户终端要将呼叫请求发送到归属MCPTT Application的SP_IGW，该SP_IGW将呼叫请求转发给MCPTT Application Server。
1202、在上述集群应用服务器根据上述业务类别的标识信息确定上述呼叫请求为组呼业务后，上述集群应用服务器向群组管理功能模块发送携带有群组标识的查询消息，以使上述群组管理功能模块根据上述查询消息从数据库中查询与上述群组标识对应的群组信息；
在上述MCPTT Application Server根据上述业务类别的标识信息确定上述呼叫请求为组呼业务后，上述MCPTT Application Server向Group Management Function发送携带有群组标识的查询消息，以使上述Group Management Function根据上述查询消息从数据库中查询与上述群组标识对应的群组信息；可以理解的是，上述SP_IGW将呼叫请求转发给MCPTT Application Server进行业务处理，MCPTT Application Server进行业务分析，根据上述业务类别的标识信息，在确定为组呼业务后，向上述Group Management Function发送查询消息，该查询消息中携带有群组标识；上述Group Management Function接收上述MCPTT Application Server发送的上述查询消息，并根据上述查询消息从数据库中查询与上述群组标识对应的群组信息，上述群组信息包括群组成员身份标识列表和/或群组区域列表。
1203、上述集群应用服务器在接收到上述群组管理功能模块发送的群组信息的返回消息后，向媒体资源处理模块发送指示消息；
上述MCPTT Application Server在接收到上述Group Management Function发送的群组信息的返回消息后，向上述Media Processing Function发送指示消息；上述指示消息用于指示上述Media Processing Function为上述第一用户终 端及群组信息中的其他群组成员建立承载。
1204、在上述媒体资源处理模块为上述第一用户终端及上述群组信息中的其他群组成员建立承载后，上述集群应用服务器向上述群组信息中的其他群组成员发起会话建立请求，以使上述第一用户终端与上述群组信息中的其他群组成员建立会话。
需要说明的是，在上述Media Processing Function为上述第一用户终端及上述群组信息中的其他群组成员建立承载后，上述SP_IGW接收上述MCPTT Application Server向上述群组信息中的其他群组成员发起的会话建立请求；并将上述会话建立请求转发给上述群组信息中的其他群组成员，以使上述第一用户终端与上述群组信息中的其他群组成员建立会话。
本发明实施例中，集群应用服务器接收信令接入和互通网关转发的第一用户终端的呼叫请求，且在根据上述业务类别的标识信息确定上述呼叫请求为组呼业务后，向上述群组管理功能模块发送携带有群组标识的查询消息，以使上述群组管理功能模块根据上述查询消息从数据库中查询与上述群组标识对应的群组信息；上述集群应用服务器在接收到上述群组管理功能模块发送的群组信息的返回消息后，向媒体资源处理模块发送指示消息，以使上述媒体资源处理模块为上述第一用户终端及群组信息中的其他群组成员建立承载；且在上述媒体资源处理模块为上述第一用户终端及上述群组信息中的其他群组成员建立承载后，向上述群组信息中的其他群组成员发起会话建立请求，以使上述第一用户终端与上述群组信息中的其他群组成员建立会话。该集群通信方法减少了现有的集群通信网络架构中的网元实体间的信令交互，且逻辑简单，利于集群时延优化。
基于上述实施例中的集群通信方法，本发明实施例中，在进行组呼业务之前需对用户进行注册，注册方式参考如下两种实现方式，
一、请参阅图13，本发明所提供的集群通信方法的另一实施例包括：
1301、集群应用服务器在接收到信令接入和互通网关发送的第一用户终端的注册消息后，从归属用户服务器中获取上述第一用户终端的签约信息；
需要说明的是，在本地网络中进行业务时，上述SP_IGW接收上述第一用户终端发送的注册消息，上述MCPTT Application Server在接收到上述SP_IGW 发送的上述注册消息后，从上述MCPTT_HSS中获取上述第一用户终端的签约信息；上述注册消息中携带有该第一用户终端开户时的MCPTT Application Server域的地址；上述签约信息中包含上述第一用户终端的鉴权数据和用户数据。
漫游到IMS网络下进行业务时，上述SP_IGW接收上述第一用户终端发送的注册消息，上述MCPTT Application Server在接收到上述SP_IGW发送的上述注册消息后，从上述MCPTT_HSS中获取上述第一用户终端的签约信息；上述注册消息中携带有该第一用户终端开户时的MCPTT Application Server域的地址；上述签约信息中包含上述第一用户终端的鉴权数据和用户数据；该注册消息由IMS转发至上述SP_IGW，具体为该第一用户终端将该注册消息发送到IMS中的P-CSCF，P-CSCF可以通过用户标识等信息，得知用户非本网内用户，对于MCPTT Application的专网用户，将消息发送至IMS中的IBCF处理；IBCF根据上述注册消息中携带的MCPTT Application Server域的地址，将该注册消息发送到上述SP_IGW。
1302、上述集群应用服务器在获取上述第一用户终端的签约信息后，对上述第一用户终端进行注册；
需要说明的是，在本地网络进行业务时，上述MCPTT Application Server在接收到上述SP_IGW发送的上述注册消息后，从上述MCPTT_HSS中获取上述第一用户终端的签约信息，并对上述第一用户终端进行注册；上述签约信息中包含上述第一用户终端的鉴权数据和用户数据；MCPTT Application Server完成上述第一用户终端的注册。
漫游到IMS网络下进行业务时，上述MCPTT Application Server在接收到上述SP_IGW发送的上述注册消息后，从上述MCPTT_HSS中获取上述第一用户终端的签约信息，并对上述第一用户终端进行注册；上述签约信息中包含上述第一用户终端的鉴权数据和用户数据；MCPTT Application Server完成上述第一用户终端的注册。
1303、上述集群应用服务器接收上述信令接入和互通网关转发的第一用户终端的呼叫请求；
上述MCPTT Application Server接收上述SP_IGW转发的第一用户终端的 呼叫请求；需要说明的是，在本地网络进行业务时，上述SP_IGW接收第一用户终端发送的呼叫请求，上述呼叫请求中携带有业务类别的标识信息；该第一用户终端的归属域处理呼叫业务，因此该第一用户终端要将呼叫请求发送到归属MCPTT Application的SP_IGW，该SP_IGW将呼叫请求转发给MCPTT Application Server。
漫游到IMS网络下进行业务时，上述SP_IGW接收第一用户终端发送的呼叫请求，上述呼叫请求中携带有业务类别的标识信息；该第一用户终端的归属域处理呼叫业务，因此该第一用户终端要将呼叫请求发送到归属MCPTT Application的SP_IGW；此时，也由IMS进行转发，具体为第一用户终端将该呼叫请求发送的P-CSCF，用户注册时，记录了IBCF与归属网路的SP_IGW地址，并将这两个网元的地址放在Route头域中，P-CSCF通过Route头域将该呼叫请求转发给IBCF；IBCF控制IBGF建立与该第一用户终端之间的承载；IBCF通过该呼叫请求中携带的Request-URI，解析出该呼叫请求中的SP_IGW地址，将该呼叫请求转发给上述第一用户终端的归属域SP_IGW，该SP_IGW将呼叫请求转发给MCPTT Application Server。
1304、在上述集群应用服务器根据上述业务类别的标识信息确定上述呼叫请求为组呼业务后，上述集群应用服务器向群组管理功能模块发送携带有群组标识的查询消息，以使上述群组管理功能模块根据上述查询消息从数据库中查询与上述群组标识对应的群组信息；
在上述MCPTT Application Server根据上述业务类别的标识信息确定上述呼叫请求为组呼业务后，上述MCPTT Application Server向Group Management Function发送携带有群组标识的查询消息，以使上述Group Management Function根据上述查询消息从数据库中查询与上述群组标识对应的群组信息；需要说明的是，上述SP_IGW将呼叫请求转发给MCPTT Application Server进行业务处理，MCPTT Application Server进行业务分析，根据上述业务类别的标识信息，在确定为组呼业务后，向上述Group Management Function发送查询消息，该查询消息中携带有群组标识；上述Group Management Function接收上述MCPTT Application Server发送的上述查询消息，并根据上述查询消息从数据库中查询与上述群组标识对应的群组信息，上述群组信息包括群组成员 身份标识列表和/或群组区域列表。
1305、上述集群应用服务器在接收到上述群组管理功能模块发送的群组信息的返回消息后，向媒体资源处理模块发送指示消息；
上述MCPTT Application Server在接收到上述Group Management Function发送的群组信息的返回消息后，向上述Media Processing Function发送指示消息；上述指示消息用于指示上述Media Processing Function为上述第一用户终端及群组信息中的其他群组成员建立承载。
1306、在上述媒体资源处理模块为上述第一用户终端及上述群组信息中的其他群组成员建立承载后，上述集群应用服务器向上述群组信息中的其他群组成员发起会话建立请求，以使上述第一用户终端与上述群组信息中的其他群组成员建立会话。
需要说明的是，在上述Media Processing Function为上述第一用户终端及上述群组信息中的其他群组成员建立承载后，上述SP_IGW接收上述MCPTT Application Server向上述群组信息中的其他群组成员发起的会话建立请求；并将上述会话建立请求转发给上述群组信息中的其他群组成员，以使上述第一用户终端与上述群组信息中的其他群组成员建立会话。
本发明实施例中，上述集群应用服务器在接收到上述信令接入和互通网关发送的上述注册消息后，从上述归属用户服务器中获取上述第一用户终端的签约信息，并对上述第一用户终端进行注册；且通过在本地网络以及漫游到IMS网络进行业务时对应的注册方式，给呼叫业务进行的稳定性提供了保障。
二、请参阅图14，本发明所提供的集群通信方法的另一实施例包括：
1401、集群应用服务器在接收到信令接入和互通网关发送的通知注册消息后，从归属用户服务器中获取上述第一用户终端的签约信息；
MCPTT Application Server在接收到SP_IGW发送的通知注册消息后，从MCPTT_HSS中获取上述第一用户终端的签约信息；上述通知注册消息为上述SP_IGW对上述第一用户终端进行注册后发送的通知消息；需要说明的是，在本地网络中进行业务时，上述SP_IGW接收上述第一用户终端发送的注册消息，并根据上述注册消息从上述MCPTT_HSS中获取上述第一用户终端的签约信息，以及根据上述第一用户终端的签约信息对上述第一用户终端进行注 册；上述注册消息中携带有上述第一用户终端开户时的归属域的地址；该第一用户终端携带SP_IGW域的地址，向SP_IGW发送注册消息；SP_IGW从MCPTT_HSS中获取上述第一用户终端的签约信息以完成该第一用户终端的注册，上述签约信息中包含上述第一用户终端的鉴权数据和用户数据；完成注册后，SP_IGW向MCPTT Application Server发送通知注册消息；MCPTT Application Server在接收到上述SP_IGW发送的通知注册消息后从MCPTT_HSS中获取上述第一用户终端的签约信息以完成通知注册；
漫游到IMS网络下进行业务时，上述SP_IGW接收上述第一用户终端发送的注册消息，并根据上述注册消息从上述MCPTT_HSS中获取上述第一用户终端的签约信息，以及根据上述第一用户终端的签约信息对上述第一用户终端进行注册；上述注册消息中携带有上述第一用户终端开户时的归属域的地址；IBCF根据该第一用户终端注册消息中携带的MCPTT Application域的地址，将该注册消息发送到SP_IGW；SP_IGW从MCPTT_HSS中获取上述第一用户终端的签约信息以完成该第一用户终端的注册，上述签约信息中包含上述第一用户终端的鉴权数据和用户数据；完成注册后，SP_IGW向MCPTT Application Server发送通知注册消息；MCPTT Application Server在接收到上述SP_IGW发送的通知注册消息后从MCPTT_HSS中获取上述第一用户终端的签约信息以完成通知注册。
1402、上述集群应用服务器接收上述信令接入和互通网关转发的第一用户终端的呼叫请求；
上述MCPTT Application Server接收上述SP_IGW转发的第一用户终端的呼叫请求；需要说明的是，在本地网络进行业务时，上述SP_IGW接收第一用户终端发送的呼叫请求，上述呼叫请求中携带有业务类别的标识信息；该第一用户终端的归属域处理呼叫业务，因此该第一用户终端要将呼叫请求发送到归属MCPTT Application的SP_IGW，该SP_IGW将呼叫请求转发给MCPTT Application Server。
漫游到IMS网络下进行业务时，上述SP_IGW接收第一用户终端发送的呼叫请求，上述呼叫请求中携带有业务类别的标识信息；该第一用户终端的归属域处理呼叫业务，因此该第一用户终端要将呼叫请求发送到归属MCPTT  Application的SP_IGW；此时，也由IMS进行转发，具体为该第一用户终端将该呼叫请求发送的P-CSCF，用户注册时，记录了IBCF与归属网路的SP_IGW地址，并将这两个网元的地址放在Route头域中，P-CSCF通过Route头域将该呼叫请求转发给IBCF；IBCF控制IBGF建立与该第一用户终端之间的承载；IBCF通过该呼叫请求中携带的Request-URI，解析出该呼叫请求中的SP_IGW地址，将该呼叫请求转发给上述第一用户终端的归属域SP_IGW，该SP_IGW将呼叫请求转发给MCPTT Application Server。
1403、在上述集群应用服务器根据上述业务类别的标识信息确定上述呼叫请求为组呼业务后，上述集群应用服务器向群组管理功能模块发送携带有群组标识的查询消息，以使上述群组管理功能模块根据上述查询消息从数据库中查询与上述群组标识对应的群组信息；
在上述MCPTT Application Server根据上述业务类别的标识信息确定上述呼叫请求为组呼业务后，上述MCPTT Application Server向Group Management Function发送携带有群组标识的查询消息，以使上述Group Management Function根据上述查询消息从数据库中查询与上述群组标识对应的群组信息；需要说明的是，上述SP_IGW将呼叫请求转发给MCPTT Application Server进行业务处理，MCPTT Application Server进行业务分析，根据上述业务类别的标识信息，在确定为组呼业务后，向上述Group Management Function发送查询消息，该查询消息中携带有群组标识；上述Group Management Function接收上述MCPTT Application Server发送的上述查询消息，并根据上述查询消息从数据库中查询与上述群组标识对应的群组信息，上述群组信息包括群组成员身份标识列表和/或群组区域列表。
1404、上述集群应用服务器在接收到上述群组管理功能模块发送的群组信息的返回消息后，向媒体资源处理模块发送指示消息；
上述MCPTT Application Server在接收到上述Group Management Function发送的群组信息的返回消息后，向上述Media Processing Function发送指示消息；上述指示消息用于指示上述Media Processing Function为上述第一用户终端及群组信息中的其他群组成员建立承载。
1405、在上述媒体资源处理模块为上述第一用户终端及上述群组信息中的 其他群组成员建立承载后，上述集群应用服务器向上述群组信息中的其他群组成员发起会话建立请求，以使上述第一用户终端与上述群组信息中的其他群组成员建立会话。
需要说明的是，在上述Media Processing Function为上述第一用户终端及上述群组信息中的其他群组成员建立承载后，上述SP_IGW接收上述MCPTT Application Server向上述群组信息中的其他群组成员发起的会话建立请求；并将上述会话建立请求转发给上述群组信息中的其他群组成员，以使上述第一用户终端与上述群组信息中的其他群组成员建立会话。
本发明实施例中，集群应用服务器在接收到信令接入和互通网关发送的通知注册消息后，从归属用户服务器中获取上述第一用户终端的签约信息，以完成通知注册；且通过在本地网络以及漫游到IMS网络进行业务时对应的注册方式，给呼叫业务进行的稳定性提供了保障。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统，装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统，装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
以上所述，以上实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。

Claims (17)

  1. 一种集群通信系统，其特征在于，包括：
    集群应用服务器、归属用户服务器、信令接入和互通网关、群组管理功能模块、媒体资源处理模块；
    所述信令接入和互通网关用于接收第一用户终端发送的呼叫请求，所述呼叫请求中携带有业务类别的标识信息；
    所述集群应用服务器用于接收所述信令接入和互通网关转发的所述呼叫请求，且在根据所述业务类别的标识信息确定所述呼叫请求为组呼业务后，向所述群组管理功能模块发送查询消息，所述查询消息中携带有群组标识；
    所述群组管理功能模块用于接收所述集群应用服务器发送的所述查询消息，并根据所述查询消息从数据库中查询与所述群组标识对应的群组信息，所述群组信息包括群组成员身份标识列表和/或群组区域列表；
    所述集群应用服务器还用于在接收到所述群组管理功能模块发送的群组信息的返回消息后，向所述媒体资源处理模块发送指示消息；所述指示消息用于指示所述媒体资源处理模块为所述第一用户终端及群组信息中的其他群组成员建立承载；
    所述集群应用服务器还用于在所述媒体资源处理模块为所述第一用户终端及所述群组信息中的其他群组成员建立承载后，向所述群组信息中的其他群组成员发起会话建立请求，以使所述第一用户终端与所述群组信息中的其他群组成员建立会话。
  2. 根据权利要求1所述的集群通信系统，其特征在于，
    所述信令接入和互通网关还用于接收所述第一用户终端发送的注册消息，所述注册消息中携带有所述第一用户终端开户时的归属域的地址；
    所述集群应用服务器还用于在接收到所述信令接入和互通网关发送的所述注册消息后，从所述归属用户服务器中获取所述第一用户终端的签约信息，并对所述第一用户终端进行注册。
  3. 根据权利要求1所述的集群通信系统，其特征在于，所述信令接入和互通网关还用于接收所述第一用户终端发送的注册消息，并根据所述注册消息从所述归属用户服务器中获取所述第一用户终端的签约信息，以及根据所述第 一用户终端的签约信息对所述第一用户终端进行注册；所述注册消息中携带有所述第一用户终端开户时的归属域的地址；
    所述集群应用服务器还用于在接收到所述信令接入和互通网关发送的通知注册消息后，从所述归属用户服务器中获取所述第一用户终端的签约信息。
  4. 根据权利要求1至3任一项所述的集群通信系统，其特征在于，所述集群通信系统通过所述媒体资源处理模块与演进分组系统EPS进行媒体平面的通信，且通过所述信令接入和互通网关与所述演进分组系统EPS进行信令平面的通信。
  5. 根据权利要求1至3任一项所述的集群通信系统，其特征在于，所述集群通信系统的数量为至少两个，各个集群通信系统控制设定范围内的小区；其中，所述各个集群通信系统之间通过各自的所述媒体资源处理模块进行媒体平面的通信，且通过各自的所述信令接入和互通网关进行信令平面的通信。
  6. 根据权利要求5所述的集群通信系统，其特征在于，所述各个集群通信系统之间通过IP多媒体子系统进行漫游通信，其中，所述各个集群通信系统中的媒体资源处理模块与所述IP多媒体子系统进行媒体平面的通信，所述各个集群通信系统中的信令接入和互通网关与所述IP多媒体子系统进行信令平面的通信。
  7. 根据权利要求6所述的集群通信系统，其特征在于，所述信令接入和互通网关具体用于接收所述IP多媒体子系统转发的所述第一用户终端发送的注册消息，并将所述注册消息发送给所述集群应用服务器。
  8. 根据权利要求6所述的集群通信系统，其特征在于，所述信令接入和互通网关具体用于接收所述IP多媒体子系统转发的所述第一用户终端发送的呼叫请求。
  9. 根据权利要求1至3任一项所述的集群通信系统，其特征在于，所述信令接入和互通网关还用于接收所述集群应用服务器向所述群组信息中的其他群组成员发起的会话建立请求，并将所述会话建立请求转发给所述群组信息中的其他群组成员，以使所述第一用户终端与所述群组信息中的其他群组成员建立会话。
  10. 一种集群应用服务器，其特征在于，包括：
    接收单元，用于接收信令接入和互通网关转发的第一用户终端的呼叫请求，所述呼叫请求中携带有业务类别的标识信息；
    第一发送单元，用于在根据所述业务类别的标识信息确定所述呼叫请求为组呼业务后，向群组管理功能模块发送携带有群组标识的查询消息，以使所述群组管理功能模块根据所述查询消息从数据库中查询与所述群组标识对应的群组信息；所述群组信息包括群组成员身份标识列表和/或群组区域列表；
    第二发送单元，用于在接收到所述群组管理功能模块发送的群组信息的返回消息后，向媒体资源处理模块发送指示消息；所述指示消息用于指示所述媒体资源处理模块为所述第一用户终端及群组信息中的其他群组成员建立承载；
    处理单元，用于在所述媒体资源处理模块为所述第一用户终端及所述群组信息中的其他群组成员建立承载后，向所述群组信息中的其他群组成员发起会话建立请求，以使所述第一用户终端与所述群组信息中的其他群组成员建立会话。
  11. 根据权利要求10所述的集群应用服务器，其特征在于，所述服务器还包括：
    获取单元，用于在接收到所述信令接入和互通网关发送的所述第一用户终端的注册消息后，从归属用户服务器中获取所述第一用户终端的签约信息；所述注册消息中携带有所述第一用户终端开户时的归属域的地址；
    注册单元，用于在所述获取单元获取所述第一用户终端的签约信息后，对所述第一用户终端进行注册。
  12. 根据权利要求10所述的集群应用服务器，其特征在于，所述服务器还包括：
    获取单元，用于在接收到所述信令接入和互通网关发送的通知注册消息后，从归属用户服务器中获取所述第一用户终端的签约信息；所述通知注册消息为所述信令接入和互通网关对所述第一用户终端进行注册后发送的通知消息。
  13. 根据权利要求10至12任一项所述的集群应用服务器，其特征在于，所述处理单元具体用于在所述媒体资源处理模块为所述第一用户终端及所述群组信息中的其他群组成员建立承载后，向所述信令接入和互通网关发送会话 建立请求，并通过所述信令接入和互通网关将所述会话建立请求转发给所述群组信息中的其他群组成员，以使所述第一用户终端与所述群组信息中的其他群组成员建立会话。
  14. 一种集群通信方法，其特征在于，包括：
    集群应用服务器接收信令接入和互通网关转发的第一用户终端的呼叫请求，所述呼叫请求中携带有业务类别的标识信息；
    在所述集群应用服务器根据所述业务类别的标识信息确定所述呼叫请求为组呼业务后，所述集群应用服务器向群组管理功能模块发送携带有群组标识的查询消息，以使所述群组管理功能模块根据所述查询消息从数据库中查询与所述群组标识对应的群组信息；所述群组信息包括群组成员身份标识列表和/或群组区域列表；
    所述集群应用服务器在接收到所述群组管理功能模块发送的群组信息的返回消息后，向媒体资源处理模块发送指示消息；所述指示消息用于指示所述媒体资源处理模块为所述第一用户终端及群组信息中的其他群组成员建立承载；
    在所述媒体资源处理模块为所述第一用户终端及所述群组信息中的其他群组成员建立承载后，所述集群应用服务器向所述群组信息中的其他群组成员发起会话建立请求，以使所述第一用户终端与所述群组信息中的其他群组成员建立会话。
  15. 根据权利要求14所述的集群通信方法，其特征在于，所述集群应用服务器接收信令接入和互通网关转发的呼叫请求之前包括：
    所述集群应用服务器在接收到所述信令接入和互通网关发送的所述第一用户终端的注册消息后，从归属用户服务器中获取所述第一用户终端的签约信息；所述注册消息中携带有所述第一用户终端开户时的归属域的地址；
    所述集群应用服务器在获取所述第一用户终端的签约信息后，对所述第一用户终端进行注册。
  16. 根据权利要求14所述的集群通信方法，其特征在于，所述集群应用服务器接收信令接入和互通网关转发的呼叫请求之前包括：
    所述集群应用服务器在接收到所述信令接入和互通网关发送的通知注册 消息后，从归属用户服务器中获取所述第一用户终端的签约信息；所述通知注册消息为所述信令接入和互通网关对所述第一用户终端进行注册后发送的通知消息。
  17. 根据权利要求14至16任一项所述的集群通信方法，其特征在于，所述集群应用服务器向所述群组信息中的其他群组成员发起会话建立请求具体包括：
    所述集群应用服务器向所述信令接入和互通网关发送会话建立请求，并通过所述信令接入和互通网关将所述会话建立请求转发给所述群组信息中的其他群组成员，以使所述第一用户终端与所述群组信息中的其他群组成员建立会话。
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