WO2005120035A1 - Procede et systeme pour l'interconnexion d'un systeme de groupe numerique et d'un systeme telephonique publique - Google Patents

Procede et systeme pour l'interconnexion d'un systeme de groupe numerique et d'un systeme telephonique publique Download PDF

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Publication number
WO2005120035A1
WO2005120035A1 PCT/CN2005/000448 CN2005000448W WO2005120035A1 WO 2005120035 A1 WO2005120035 A1 WO 2005120035A1 CN 2005000448 W CN2005000448 W CN 2005000448W WO 2005120035 A1 WO2005120035 A1 WO 2005120035A1
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WIPO (PCT)
Prior art keywords
cluster
call
gateway
telephone terminal
terminal
Prior art date
Application number
PCT/CN2005/000448
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English (en)
French (fr)
Inventor
Zhaosen Geng
Qiang Wu
Tie Li
Original Assignee
Zte Corporation
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Publication of WO2005120035A1 publication Critical patent/WO2005120035A1/zh

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Classifications

    • 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
    • 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
    • H04L65/4046—Arrangements for multi-party communication, e.g. for conferences with distributed floor control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/40—Connection management for selective distribution or broadcast
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/08—Trunked mobile radio systems
    • 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
    • H04W4/08—User group management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/30—Resource management for broadcast services

Definitions

  • the present invention relates to the field of mobile communications, and in particular, to a technology for interconnecting and interconnecting a digital trunking system and an ordinary telephone system. Background technique
  • trunking communication has increasingly become an indispensable service content.
  • Digital trunking communication systems are dedicated mobile communication systems where multiple users share a set of wireless channels and use these channels dynamically, with a shared frequency.
  • the biggest feature of trunked communication is that the voice communication adopts PTT (Push To Talk) button, which can be connected in a push-to-talk manner. The called party can answer without going off-hook, and the connection speed is fast, and it can support functions such as group calling. .
  • the terminals participating in the PTT trunk call are generally special trunk-specific terminals, such as telephone terminals (such as fixed phones, CDMA mobile phones, GSM mobile phones, PHS mobile phones, 3G mobile phones, etc.), SIP (Session Initiation Protocol, SIP for short) terminals.
  • Other devices (these terminals are collectively referred to as telephone terminals) can also be added to the PTT trunking call, which will greatly expand the trunking call range, thereby effectively solving the problems of insufficient wireless network coverage of the digital trunking system. '
  • existing trunking communication systems have provided interconnection between digital trunking systems and ordinary telephone systems (including ordinary telephone systems such as fixed telephone systems, CDMA network telephone systems, GSM network telephone systems, PHS telephone systems, and next-generation network telephone systems).
  • the interworking function that is, the telephone terminal can also participate in trunking calls, but these digital trunking systems and ordinary telephone systems have several shortcomings in the way of interconnection. For example, when digital trunking systems and ordinary telephone systems are interconnected, No. 7 information is usually used.
  • the technical problem to be solved by the present invention is to provide a method and system for realizing interconnection and interworking between a digital trunking system and an ordinary telephone system, which can overcome the narrow application range of the digital trunking system existing in the prior art, difficult technical implementation, and high system control complexity.
  • the disadvantages are that it can expand the application range of the digital trunking system, simplify the technical implementation difficulty and control complexity, and solve the problem of telephone terminals participating in trunking calls.
  • the present invention provides a method for implementing interconnection and interworking between a digital trunking system and an ordinary telephone system, which includes:
  • Steps for a telephone terminal to initiate a trunk call as a caller Softswitch uses the call as a normal voice call and forwards the request to the trunking gateway of the digital trunking system.
  • the trunking gateway implements the conversion between external standard signaling and internal trunking system signaling And conversion of media formats;
  • Steps for the telephone terminal to join the trunk call as the called party the dispatch server sends a request for paging the telephone terminal to the trunk gateway, and the trunk gateway invites the telephone terminal to join the call through the ordinary telephone system, and implements signaling between the two systems in the trunk gateway Format and media format conversion;
  • Steps for the terminal to apply for the speaking right The telephone terminal requests to forward to the dispatching server through the cluster gateway, and the dispatching server grants the speaking right to the telephone terminal according to the request status of all the terminals for the speaking right at that time;
  • Steps for the phone terminal to release the speaking right the request for releasing the speaking right is forwarded to the dispatch server through the cluster gateway;
  • Steps for a telephone terminal to exit a trunk call Steps for a telephone terminal to exit a trunk call.
  • the telephone terminal includes a fixed telephone, a CDMA mobile phone, a GSM mobile phone, a 3G mobile phone, a PHS mobile phone, or a SIP terminal.
  • Steps for the telephone terminal to actively exit the cluster call the softswitch forwards the exit request through the cluster gateway to the dispatch server, and then the dispatch server deletes the telephone terminal from the cluster call member; or
  • Steps for digital trunking system to force telephone terminal to exit trunking call When terminating the call with the telephone terminal, the cluster gateway notifies the softswitch to end the call in accordance with the normal telephone processing mode, and releases the network resources allocated to the telephone terminal.
  • the above method for interconnecting and interconnecting the digital trunking system and the ordinary telephone system, wherein the step of initiating a trunk call by the telephone terminal as a caller specifically includes the following steps:
  • Step 11 The telephone terminal dials the number of the trunk call and initiates the trunk call
  • Step 12 After the softswitch analyzes the origin of the call according to the group number of the call, it sends signaling to the cluster gateway of the digital trunking system to invite the call, and the invited object is the calling number.
  • Step 13 The trunking gateway sends to the dispatch server Forward the request to initiate a call;
  • Step 14 The dispatch server authenticates the cluster home register according to the calling number. If the authentication fails, step 19 is performed, otherwise the next step is performed;
  • Step 15 The dispatch server pages each cluster terminal according to the normal cluster call process, and after the paging is completed, notifies the cluster gateway to accept the call request initiated by the telephone terminal;
  • Step 16 The cluster gateway allocates media stream resources for the phone terminal to establish this call.
  • Step 17 The cluster gateway notifies the soft switch to accept the call request from the phone terminal;
  • Step 18 The next generation network allocates network resources and establishes a connection for the calling terminal.
  • Step 19 The dispatch server sends a call rejection setup message to the cluster gateway.
  • the cluster gateway sends a rejection message to the softswitch.
  • the softswitch sends the setup to the phone terminal. Call failed message.
  • step 15 specifically includes the following steps:
  • Step 151 In the case of authentication, the scheduling server pages all activated wireless terminals of the cluster according to the group member information returned by the cluster home register;
  • Step 152 If there is no transmission channel carrying the cluster signaling between the dispatch server and the cluster signaling gateway, establish a channel carrying the cluster signaling between them;
  • Step 153 if there is no transmission channel carrying the cluster media stream between the dispatch server and the cluster media gateway, establish a channel for transmitting the cluster voice between them;
  • Step 154 The scheduling server notifies the trunking signaling gateway that the call is established.
  • Step 21 a trunk terminal or a telephone terminal initiates a trunk call
  • Step 22 The digital trunking system calls all called terminals included in the call;
  • Step 23 If the dispatch server finds that the called party of the trunk call includes a telephone terminal, the dispatch server sends a call telephone terminal message to the trunk gateway;
  • Step 24 The cluster gateway analyzes the softswitch of its home location according to the number of the telephone terminal and sends a call invitation to the softswitch;
  • Step 25 the softswitch calls the telephone terminal
  • Step 26 The phone terminal goes off-hook
  • Step 27 The softswitch allocates network resources for the phone terminal, and sends an invitation invitation message to the cluster gateway.
  • Step 28 The cluster gateway notifies the dispatch server that the call to the telephone terminal is completed, and the telephone terminal is added to the cluster call.
  • the dispatching server in the step of applying for the speaking right of the terminal grants the speaking right to the telephone terminal with the highest priority according to the request of all the terminals for the speaking right at that time.
  • Step 31 Activate the speaking right button agreed by the system, and the telephone terminal applies for speaking right;
  • Step 32 The button information requesting speaking right is forwarded to the cluster gateway through the next-generation network media gateway;
  • Step 33 The cluster gateway sends a request for a speaking right to the telephone terminal to the dispatch server;
  • Step 35 The trunk gateway passes the next-generation network media gateway's transit and uses a voice prompt to tell the telephone terminal whether the application for speaking right is successful.
  • the foregoing method for implementing interconnection and interworking between a digital trunking system and an ordinary telephone system wherein the excellent
  • the priority principle means that the scheduling server grants the speaking right to the user with the highest priority for the user who currently applies for the speaking right.
  • the terminal that is currently speaking also needs to participate in the comparison of priorities. When the priorities are the same, the terminal that applies for the speaking right first has priority. Gain the right to speak.
  • Step 41 Press the system to release the speaking right button, and start the phone terminal to release the speaking right process;
  • Step 42 The button releasing the speaking right information is forwarded to the cluster gateway through the next-generation network media gateway;
  • Step 43 The cluster gateway sends a request for the telephone terminal to release the speaking right to the dispatch server; Step 44: the dispatch server retracts the speaking right.
  • the digital trunking system in addition to the telephone terminal can actively release the right to speak, can also actively release the right to speak on the telephone terminal; when the right to speak is granted to the telephone terminal, if the telephone When the terminal has not spoken for more than the prescribed time of the system, or the length of the current speaking time of the telephone terminal has exceeded the maximum speaking time stipulated by the digital trunking system, the dispatch server has the right to directly release the speaking right of the telephone terminal.
  • Step 51 When the telephone terminal wants to exit the call, hang up the phone directly;
  • Step 52 The softswitch sends a hang-up message to the cluster gateway after the phone terminal hangs up;
  • Step 53 The cluster gateway notifies the cluster dispatch server that the telephone terminal has exited the call
  • Step 54 The dispatch server will delete the telephone terminal from the calling member according to this instruction.
  • the foregoing method for interconnecting and interconnecting the digital trunking system and the ordinary telephone system, wherein the digital trunking system forcing the telephone terminal to exit the trunk call specifically includes the following steps:
  • Step 61 the dispatch server notifies the cluster gateway to let the designated phone terminal exit the cluster call;
  • step 62 the cluster gateway notifies the soft switch to release the designated phone terminal;
  • Step 63 The softswitch notifies the telephone terminal of the call end
  • Step 64 The soft switch releases the network resources previously allocated for the telephone terminal
  • Step 65 The softswitch answers the cluster gateway, and the phone terminal is released.
  • Step 66 The cluster gateway releases the network resources previously allocated for the phone terminal;
  • Step 67 The cluster gateway answers the dispatch server, and the telephone terminal has exited the cluster call.
  • the foregoing method for interconnecting the digital trunking system with the ordinary telephone system wherein when the trunking gateway is connected to the next-generation network, the H.323 protocol or the SIP protocol is used to implement signaling interaction, and the RTP / RTCP protocol is used to transmit the voice media stream; the trunking
  • the signaling gateway adopts Megaco protocol or MGCP protocol to control the cluster media gateway.
  • the dispatch server will add multiple users to the call. If a private call is initiated, the number dialed by the user is the cluster number of the called user, which corresponds to only one cluster user.
  • the present invention also provides a system for implementing interconnection and interworking between a digital trunking system and an ordinary telephone system, including a trunking terminal, a base station, a scheduling server, a trunking home register, a trunking signaling gateway, and a trunking media gateway It consists of a digital trunking system and a next-generation network system consisting of a softswitch module, a next-generation network media gateway, and a telephone terminal. Among them:
  • the telephone terminal acts as the calling party to initiate a cluster call.
  • the softswitch module forwards the call as a normal voice call to the trunking gateway of the digital trunking system.
  • the trunking gateway implements conversion between external standard signaling and internal trunking system signaling and the media format. Conversion
  • the telephone terminal joins the cluster call as the called party.
  • the dispatch server sends a request for paging the telephone terminal to the cluster gateway.
  • the cluster gateway invites the telephone terminal to join the call through the next-generation network system, and implements the signaling format between the two systems in the cluster gateway. And media format conversion;
  • the telephone terminal applies for the speaking right, and the telephone terminal requests to forward to the dispatching server through the cluster gateway, and the dispatching server grants the speaking right to the telephone terminal according to the request of all terminals for the speaking right at the time;
  • the server; and the telephone terminal exit the cluster call through the cluster gateway.
  • the above-mentioned system for interconnecting the digital trunking system with the ordinary telephone system wherein: the trunking terminal and the base station do not need to perform direct signaling and voice interaction with the ordinary telephone system, and do not need to care about whether ordinary telephone terminals participate in the call;
  • the dispatching server is responsible for maintaining the cluster call that the cluster terminal and the ordinary telephone terminal participate in, performing signaling interaction with the cluster signaling gateway to complete the cluster call control of the ordinary telephone, and performing media interaction with the cluster media gateway to complete the voice forwarding work related to the ordinary telephone;
  • the cluster home register is responsible for maintaining the terminal type and user information of the cluster terminal and the ordinary telephone terminal. And group information, the authentication and charging of trunk calls to trunk terminals and ordinary telephone terminals;
  • trunk signaling gateways are mainly responsible for signaling translation between trunk systems and ordinary telephone systems, and signaling interaction with the softswitch module is completed Connection control of trunk calls, controlling resources of trunk media gateways, maintaining and scheduling communication links between servers;
  • the cluster media gateway is mainly responsible for distributing voice media streams, maintaining and scheduling the voice link between servers, and responsible for format conversion of voice media streams between digital trunking systems and ordinary telephone systems, and playing prompts;
  • the soft switch module is responsible for maintaining the call of the ordinary telephone terminal, and performing signaling interaction with the cluster signaling gateway to complete the connection control of the cluster call and control the resources of the next-generation network media gateway;
  • the next-generation network media gateway is mainly responsible for accepting the control of the softswitch module and forwarding the voice media stream; the telephone terminal can participate in the cluster call as the terminal of the cluster call, that is, it can initiate the cluster call as the calling party, or it can passively participate in the cluster call as the called party .
  • the telephone terminal dials the number of the trunk call and initiates the trunk call
  • the softswitch module analyzes the origin of the call according to the group number of the call, it sends signaling to the trunking gateway of the digital trunking system to invite the call, and the invited object is the calling number;
  • the cluster gateway forwards the request to initiate a call to the dispatch server
  • the dispatching server authenticates the cluster home register according to the calling number. If the authentication fails, the dispatching server will send a call rejection message to the cluster gateway.
  • the cluster gateway sends a rejection message to the softswitch module.
  • the softswitch module sends a call to the phone terminal to establish the call. Failure message
  • the dispatch server pages each cluster terminal according to the normal cluster call process, and after the page is completed, it notifies the cluster gateway to accept the call request initiated by the telephone terminal;
  • the cluster gateway allocates media stream resources for the phone terminal to establish this call
  • the cluster gateway notifies the softswitch module to accept the call request from the telephone terminal;
  • the next generation network allocates network resources and establishes connections for telephone terminals that initiate calls.
  • the trunk terminal or telephone terminal initiates a trunk call
  • the digital trunking system calls all called terminals included in the call; If the dispatch server finds that the called party of the trunk call includes a telephone terminal, the dispatch server sends a call telephone terminal message to the trunk gateway;
  • the cluster gateway analyzes the soft switching module of the home terminal according to the number of the telephone terminal and sends a call invitation to the soft switching module;
  • the softswitch module calls the telephone terminal
  • the soft switch module allocates network resources for the telephone terminal and sends an acceptance invitation message to the cluster gateway.
  • the cluster gateway notifies the dispatch server that the call to the telephone terminal is completed, and the telephone terminal joins the cluster call.
  • the phone terminal activates the system to apply for the right to speak, and applies the right to speak;
  • the key information for applying for the speaking right is forwarded to the cluster gateway through the next-generation network media gateway; the cluster gateway sends a request for the speaking right to the telephone terminal to the dispatch server;
  • the scheduling server decides whether to grant the speaking right to the phone terminal according to the priority principle. If the phone terminal can obtain the speaking right, the scheduling server sends a speaking right message to the cluster gateway, otherwise the scheduling server sends a speaking right denial message to the cluster gateway;
  • the trunk gateway passes the next-generation network media gateway's transfer to tell the phone terminal whether the application for speaking right is successful this time by means of voice prompts.
  • the phone terminal presses the system release right button to start the process of releasing the right;
  • the key information for releasing the speaking right is forwarded to the cluster gateway through the next-generation network media gateway; the cluster gateway sends a request for the phone terminal to release the speaking right to the dispatch server;
  • the dispatch server takes back the right to speak.
  • the soft switch module sends a hang-up message to the cluster gateway after the phone terminal hangs up;
  • the cluster gateway notifies the cluster dispatch server that the telephone terminal has exited the call
  • the dispatch server will delete the telephone terminal from the calling member according to this instruction.
  • the dispatch server notifies the cluster gateway to let the designated telephone terminal exit the cluster call;
  • the cluster gateway notifies the softswitch module to release the specified phone terminal
  • the soft switch module notifies the telephone terminal of the call end
  • the softswitch module releases the network resources previously allocated for the telephone terminal
  • the softswitch module answers the trunking gateway and releases the phone terminal.
  • the cluster gateway releases the network resources previously allocated for the phone terminal
  • the cluster gateway answers the dispatch server, and the telephone terminal has exited the cluster call.
  • the gateway control the cluster media gateway using Megaco protocol or MGCP protocol.
  • the foregoing system for interconnecting the digital trunking system with the ordinary telephone system in which, if the user initiates a trunk group call, the number dialed by the user is a trunk group number, and the group number corresponds to two or more For a cluster user, the dispatch server will add multiple users to the call. If a private call is initiated, the number dialed by the user is the cluster number of the called user, which corresponds to only one cluster user.
  • the method and system for realizing interconnection and interoperability between the digital trunking system and the ordinary telephone system of the present invention, and the digital trunking system in the system mainly realizes interconnection and interworking with the ordinary telephone system through the next generation network, that is, the digital trunking system provides the interconnection and interworking interface with the next generation network.
  • the first generation network connects the ultimate telephone system network.
  • the trunking gateway in the digital trunking system is mainly responsible for the signal format conversion and media format conversion between the digital trunking system and the next-generation network. When the ordinary telephone system sends the signaling or media to the digital trunking system, the trunking gateway converts it to the format of the digital trunking system.
  • the trunking gateway converts it to The format of the ordinary telephone system, so as to resolve the differences in signaling and media formats between the two communication systems.
  • the interconnection scheme between the digital trunking system and the ordinary telephone system adopts a standard IP signaling protocol, and the ordinary telephone system does not need to make any changes to the trunking service, so that the implementation method is simple, the digital trunking system application range is effectively expanded, and Solve the advantages of telephone terminals participating in trunking calls.
  • FIG. 1 is a structural diagram of the interconnection network of the digital trunking system and the ordinary telephone system of the present invention.
  • FIG. 2 (a) is a diagram of the interworking protocol interface of the digital trunking system and the ordinary telephone system of the present invention.
  • Figure 2 (b) is an external protocol interface diagram of the cluster gateway of the present invention.
  • FIG. 3 is a group call establishment flowchart of a telephone terminal as a trunk group call call according to the present invention.
  • FIG. 4 is a group call establishment flowchart of a telephone terminal of the present invention as a trunk group call.
  • FIG. 5 is a flowchart of a process for applying for a speaking right by a telephone terminal according to the present invention.
  • FIG. 6 is a flowchart of a process for releasing the speaking right of the telephone terminal according to the present invention.
  • FIG. 7 is a flowchart of a process for exiting a trunk call by a telephone terminal of the present invention.
  • FIG. 8 is a flowchart of a process for forcing a telephone terminal to exit a trunk call in the digital trunking system of the present invention. detailed description
  • NGN Voice over IP
  • VoIP Voice over IP
  • NGN Next Generation Network
  • the NGN network has provided an interworking method with the traditional circuit-switched telephone network. Therefore, through the transfer of the NGN network, this solution can also complete the interconnection and interconnection between the digital trunking system and the analog telephone system.
  • the ordinary telephone system includes a traditional analog telephone system and an IP-based NGN network, but only when the trunking system and the analog telephone system communicate with each other through NGN.
  • the method for interconnecting the digital trunking system and the ordinary telephone network includes a telephone terminal as a calling party to initiate a trunk call, a telephone terminal as a called party to join a trunk call, a telephone terminal applying for a speaking right, a telephone terminal releasing a speaking right, and a telephone terminal actively There are several methods to exit the trunk call and the digital trunk system to force the telephone terminal to exit the trunk call.
  • Figure 1 shows the network structure of the digital trunking system and the ordinary telephone system. In the process of achieving interconnection, the cluster gateway 1 plays a very important role.
  • the cluster gateway 1 can be logically divided into two devices: a cluster signaling gateway 11 and a cluster media gateway 12.
  • the main functions of the cluster signaling gateway 11 are as follows: Signaling gateways when interfacing with other communication systems, such as systems such as NGN and PoC (PTT over Cellular, a digital trunking system); signaling gateways roaming between different service areas; control cluster media gateways; maintenance and scheduling servers Communication link.
  • NGN and PoC PTT over Cellular, a digital trunking system
  • the trunk media gateway 12 undertakes the following main functions: distributing voice media streams; maintaining and scheduling voice links between servers to undertake the format conversion of voice media streams between digital trunking systems and ordinary telephone systems; and playing prompts.
  • the H.323 protocol or the SIP protocol can be used to implement signaling interaction, and the Real-time Transport Protocol / RTP Control Protocol (RTP / RTCP) protocol is used. Transport voice media streams.
  • the cluster signaling gateway 11 may use the Megaco (Next Generation Network Media Gateway Control, Media Gateway Control, referred to as Megaco) protocol or the MGCP (Next Generation Network Media Gateway Control Protocol, Media Gateway Control Protocol, or MGCP) protocol. Controls the cluster media gateway 12.
  • the simplex of the terminal voice is the basic voice of the trunking service. That is, under normal circumstances, the trunking terminal cannot hear the speech of other users when speaking. Only one person can speak at the same time.
  • the media stream directions corresponding to these terminals can only receive and cannot send.
  • the media stream transmission directions corresponding to the phone terminals are only receiving and cannot send, that is, they are in a listening state and have not obtained the right to speak.
  • his voice can be duplex.
  • the trunking signaling gateway sets the media flow direction of the trunking media gateway to be bidirectional, that is, it can send or receive.
  • the following describes the telephone terminal as a calling party to initiate a trunk call, the telephone terminal as a called party to join a trunk group call, the telephone terminal to apply for the right to speak, the telephone terminal to release the right to speak, the telephone terminal to exit the trunk call, and the digital trunking system forcing.
  • the telephone terminal to exit the trunk call There are several methods for the telephone terminal to exit the trunk call.
  • trunk group call setup process As shown in Figure 3, when a telephone terminal is the initiator of a trunk group call, the trunk group call setup process is as follows:
  • Step 301 The telephone terminal dials the number of the trunk group call and initiates the trunk group call;
  • Step 302 After the softswitch analyzes the home location of the number according to the trunk group call number dialed by the phone, it will send an invitation request to the trunk signaling gateway of the digital trunk system;
  • Step 303 The cluster signaling gateway tells the softswitch that it is trying to establish a call
  • Step 304 The cluster signaling gateway sends a cluster call request message to the dispatch server to inform the telephone terminal to initiate a cluster group call.
  • Step 305 The dispatch server sends an access authentication request to the cluster home register to authenticate the telephone terminal and verify the correctness of the cluster group call number.
  • Step 306 If the authentication is successful, the cluster home register will send an access authentication response message to the dispatch server, and at the same time notify the dispatch server of the information of all group members of the group call, otherwise the dispatch home register will reject the group call request of the telephone terminal. ;
  • Step 307 In the case of authentication, the dispatch server pages all activated wireless wireless terminals according to the group member information returned by the cluster home register, and adds these terminals to the trunk call after the terminal paging response is confirmed;
  • Step 308 If there is no transmission channel carrying cluster signaling between the dispatch server and the cluster signaling gateway, a channel carrying cluster signaling will be established between them.
  • Step 309 If there is no transmission channel carrying the cluster media stream between the dispatch server and the cluster media gateway, a channel for transmitting cluster voice will be established between them.
  • Step 3 ⁇ After the above work is completed, the dispatch server notifies the trunking signaling gateway that the call is set up.
  • Step 311 The trunking signaling gateway notifies the trunking media gateway to allocate resources for the media stream of the group call through signaling interaction with the trunking media gateway. Including the allocation of media stream context, terminals, etc .;
  • Step 312 The cluster signaling gateway then notifies the softswitch that the call is successfully established
  • Step 313 The softswitch notifies the next-generation network media gateway of allocating resources for the media stream of the call, including the context and terminal for allocating the media stream, by interacting with the next-generation network media gateway signaling.
  • Step 314 Next-generation network media gateway Notify the phone terminal that the call was successfully established;
  • Step 315 The dispatch server notifies the trunking signaling gateway that the speaking right of the trunking call has been granted to the call originator, that is, the telephone terminal.
  • Step 31 6 The cluster signaling gateway modifies the media stream attribute corresponding to the phone terminal in the cluster media gateway to only receive, so that only the media stream sent by the phone terminal can pass through;
  • Step 317 The cluster media gateway sends a voice prompt to the telephone terminal through the next-generation network media gateway, that is, the telephone terminal is notified to obtain the right to speak, and the telephone terminal starts to speak.
  • a trunk call there are generally two situations in which a telephone terminal is called, one is that the telephone terminal is included in a group that includes a trunk call, but he is not the initiator of the trunk call, and the other is that the trunk call is a A private call to one, and the telephone terminal is the person being called.
  • the process for establishing a telephone terminal as a called party is as follows:
  • Step 401 A terminal initiates a call for a trunk group call, and the initiator may be an ordinary trunk terminal or a telephone terminal;
  • Step 402 The dispatch server sends an access authentication request to the cluster home register to authenticate the group call.
  • Step 403 If the call authentication is passed, the cluster home register will send an access authentication response message to the dispatch server, and at the same time inform the dispatch server of all group members of the group call, otherwise the cluster group call will be rejected;
  • Step 404 The scheduling server pages all activated wireless terminals of the cluster according to the feedback of the group member information
  • Step 405 The scheduling server finds that the group of users to be paged includes a telephone terminal, and the scheduling server sends a call connection request to the cluster signaling gateway, and the connected object is the telephone terminal;
  • Step 406 The cluster signaling gateway sends an invitation request to the softswitch, and the invited object is a telephone terminal.
  • Step 407 the softswitch responds that the cluster signaling gateway is trying to call the telephone terminal
  • Step 408 The softswitch then notifies the next-generation network media gateway to allocate resources of the media stream of the call, including the context, terminal, etc., for allocating the media stream through signaling interaction with the next-generation network media gateway.
  • Step 409 the next-generation network media gateway sends a ringing message to the telephone terminal
  • Step 410 The called user picks up the phone and confirms to join the group call.
  • Step 411 the softswitch notifies the trunking signaling gateway that the telephone terminal has been called, and confirms that the telephone terminal has joined the group call;
  • Step 412 The trunking signaling gateway forwards to the dispatch server that the telephone terminal has been paged into the trunking call;
  • Step 413 If there is no transmission channel carrying the cluster signaling between the dispatch server and the cluster signaling gateway, a channel carrying the cluster signaling will be established between them.
  • Step 414 If there is no cluster media stream between the dispatch server and the cluster media gateway, A transmission channel, a channel for transmitting trunked voice will be established between them;
  • Step 415 The cluster signaling gateway notifies the cluster media gateway to allocate resources of the media stream of the group call through signaling interaction with the cluster media gateway, including allocating media stream context, terminals, etc .;
  • Step 416 The dispatch server notifies the trunking signaling gateway to grant the speaking right to the originator of the trunking call. Since the default media stream direction in the trunking media gateway can only be sent, the trunking signaling gateway is not required to modify the media this time. Flow direction
  • Step 417 The dispatch server notifies the group call initiator that the speaking right has been granted to it and can start speaking.
  • Both telephone terminals and trunk terminals can apply to speak 3 ⁇ 4 Their applications are sent to the dispatch server uniformly, and the dispatch server decides. The following describes the procedures for the telephone terminal to apply for the right to speak and the telephone terminal to release the right to speak with reference to Figs. 5 and 6 respectively.
  • FIG. 5 describes a processing flow for a telephone terminal to apply for a speaking right, including the following steps: Step 501: The telephone terminal applies for obtaining a speaking right, and the telephone terminal may press a button for applying for a speaking right agreed by the system to apply for a speaking right, such as "* ", Etc., these can be used as keys to apply for speaking rights;
  • Step 502 The next-generation network media gateway forwards the key information of the phone terminal to the cluster media gateway, which is sent through the RTP stream;
  • Step 503 The cluster media gateway forwards the telephone terminal's request for speaking right to the dispatch server through the cluster signaling gateway;
  • Step 504 The dispatch server judges whether the telephone terminal can obtain the right to speak at this time according to the principle agreed upon by the system. If it can obtain the right to speak, execute 5041, otherwise execute 5042.
  • the scheduling server usually grants the right to speak to the user with the highest priority of the user currently applying for the right to speak, and the terminal that is currently speaking also participates in the comparison. When the priority is the same, the terminal that first applies for the right to speak has priority to obtain the right to speak;
  • step 5041 In the case where the telephone terminal applying for the speaking right can obtain the speaking right, if the speaking right at this time has been granted to the ordinary cluster terminal, the dispatch server will execute 506, otherwise directly execute 507;
  • Step 506 The dispatch server releases the speaking right of the cluster terminal.
  • Step 507 The dispatch server notifies the trunking signaling gateway of the right to speak to the telephone terminal.
  • Step 509 The cluster media gateway prompts the phone terminal to grant the right to speak through the next-generation network media gateway, and then executes 511;
  • Step 5042 If the telephone terminal cannot obtain the right to speak at this time, the dispatch server will reject the application for the right to speak through the cluster signaling gateway;
  • Step 510 The cluster media gateway voice prompts the telephone terminal through the next-generation network media gateway, and the right to speak application is rejected, and then 511 is performed;
  • FIG. 6 describes the processing flow for releasing the speaking right of the phone terminal, including the following steps: Step 601: The phone terminal presses the button for releasing the speaking right agreed by the system to release the speaking right, such as
  • Step 602 The next-generation network media gateway sends the key information for releasing the right to the cluster media gateway through the RTP stream;
  • Step 603 The cluster media gateway notifies the cluster signaling gateway, and the telephone terminal releases the right to speak.
  • Step 604 The cluster signaling gateway notifies the dispatch server, the phone terminal releases the right to speak.
  • Step 605 The dispatch server recovers the right to speak.
  • the digital trunking system can also actively release the right to speak.
  • the right to speak is granted to the phone terminal, if the phone terminal has not spoken for more than the specified time of the system, or the length of the current speaking time of the phone terminal has exceeded the maximum speaking time set by the digital trunking system, the dispatch server will directly release the phone terminal. The right to speak does not need to wait until the telephone terminal actively releases the right to speak.
  • Figure 7 describes a method for a telephone terminal to exit a trunk call, including the following steps:
  • Step 701 When the phone terminal wants to exit the group call, it can directly hang up the phone;
  • Step 702 The soft switch sends a call termination message to the cluster signaling gateway after the telephone terminal hangs up.
  • Step 703 The cluster signaling gateway notifies the dispatch server that the telephone terminal has exited the group call.
  • Step 704 The dispatch server will delete the telephone terminal from the cluster call member according to this instruction.
  • Figure 8 describes a method for a digital trunking system to force a telephone terminal to exit a trunk call including the following steps:
  • Step 801 The dispatch server notifies the trunking signaling gateway, and causes the designated telephone terminal to exit the trunking call. Called
  • Step 802 the cluster signaling gateway notifies the soft switch to release the designated phone terminal
  • Step 803 the soft switch notifies the telephone terminal of the call end
  • Step 804 the softswitch notifies the next-generation network media gateway to release the network resources previously allocated for the phone terminal;
  • Step 805 The softswitch answers the cluster gateway, and the phone terminal is released.
  • Step 806 The cluster signaling gateway notifies the cluster media gateway to release the network resources previously allocated to the telephone terminal.
  • Step 807 The cluster signaling gateway answers the dispatch server, and the telephone terminal has exited the cluster call.
  • the trunk group call is taken as an example to describe the interconnection and interworking between the digital trunking system and the ordinary telephone system.
  • This method can also be used for private trunking calls between the digital trunking system and the ordinary telephone system. The point is that a private call occurs between two terminals, and there can be multiple terminals for group calls.
  • their establishment process is basically the same, and the methods of applying for speaking rights and releasing their speaking rights are also consistent.
  • a telephone terminal is used as an example for the digital trunking system and The interconnection of the ordinary telephone system is described. This method is also applicable to the case of multiple telephone terminals.
  • a cluster media gateway a group call will be assigned a context corresponding to it. In this context, there can be multiple terminals. One terminal corresponds to a telephone terminal.
  • the cluster signaling gateway is responsible for the context, the media stream terminal, and the telephone terminal and the cluster. Relationship between calls.
  • the cluster signaling gateway When a telephone terminal is granted the right to speak, the cluster signaling gateway will set the media stream transmission direction corresponding to the speaker in the cluster media gateway to only be able to connect and the media stream transmission direction corresponding to other phone terminals will be set to only send .
  • the trunk signaling gateway When the right to speak is granted to the trunk terminal, the trunk signaling gateway will set the media stream transmission direction corresponding to all phone terminals in the trunk media gateway to send only.
  • the trunking terminal and the base station do not need to perform direct signaling and voice interaction with the ordinary telephone system, and do not need to worry about whether ordinary telephone terminals participate in the call;
  • the dispatching server is responsible for maintaining the cluster call that the cluster terminal and the ordinary telephone terminal participate in, performing signaling interaction with the cluster signaling gateway to complete the cluster call control of the ordinary telephone, and performing media interaction with the cluster media gateway to complete the voice forwarding work related to the ordinary telephone;
  • the cluster home register is responsible for maintaining the terminal type, user information, and group information of the cluster terminal and the ordinary telephone terminal, and for the authentication and charging of the cluster call for the cluster terminal and the ordinary telephone terminal.
  • the cluster signaling gateway is mainly responsible for the cluster system and ordinary telephone. Signaling translation between systems, signaling interaction with the softswitch module to complete trunk call connection control, control cluster media gateway resources, and maintain and schedule communication links between servers;
  • the cluster media gateway is mainly responsible for distributing voice media streams, maintaining and scheduling the voice link between servers, and responsible for format conversion of voice media streams between digital trunking systems and ordinary telephone systems, and playing prompts;
  • the soft switch module is responsible for maintaining the call of the ordinary telephone terminal, and performing signaling interaction with the cluster signaling gateway to complete the connection control of the cluster call and control the resources of the next-generation network media gateway;
  • the next-generation network media gateway is mainly responsible for accepting the control of the softswitch module and forwarding the voice media stream; the telephone terminal can participate in the cluster call as the terminal of the cluster call, that is, it can initiate the cluster call as the calling party, or it can passively participate in the cluster call as the called party .
  • the method and system for realizing interconnection and interoperability between the digital trunking system and the ordinary telephone system of the present invention, and the digital trunking system in the system mainly realizes interconnection with the ordinary telephone system through the next generation network. That is, the digital trunking system provides the interconnection and interworking interface with the next generation network.
  • the first generation network connects the ultimate telephone system network.
  • the trunking gateway in the digital trunking system is mainly responsible for the signal format conversion and media format conversion between the digital trunking system and the next-generation network. When the ordinary telephone system sends the signaling or media to the digital trunking system, the trunking gateway converts it to the format of the digital trunking system.
  • the trunking gateway converts it to The format of the ordinary telephone system, so as to resolve the differences in signaling and media formats between the two communication systems.
  • the interconnection scheme between the digital trunking system and the ordinary telephone system adopts a standard IP signaling protocol, and the ordinary telephone system does not need to make any changes to the trunking service, so that the implementation method is simple, the digital trunking system application range is effectively expanded, and Solve the problem of telephone terminal participating in the trunk call.

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Description

数字集群***与普通电话***实现互联互通的方法及*** 技术领域
本发明涉及移动通信领域，特别是数字集群***与普通电话***互联互通 的技术。 背景技术
在日益多样化的社会需求推动下， 移动通信技术从模拟通信***， 发展到 目前广泛应用的第二代移动通信***和 2.5代移动通信***， 一直到即将大规 模应用的第三代移动通信***移动通信技术的发展不仅满足了人们对于话音 业务的需求， 更越来越有效的满足着包括影像、 音频、 实时多媒体业务交互等 增值型业务的需求，从而使得移动通信***在人们的生活和工作中发挥着越来 越重要的作用。在所有的增值型业务中， 集群通信已经日益成为一个不可或缺 的业务内容， 数字集群通信***是多个用户共用一组无线信道， 并动态地使用 这些信道的专用移动通信***， 具有共用频率、 共用设施、 分担费用等优点， 从而使得集团用户和具有集群需求的用户得以降低通信成本进行便捷的交 流。 集群通信最大的特点是， 话音通信采用 PTT (Push To Talk) 按键， 以一 按即通的方式接续， 被叫无须摘机即可接听， 且接续速度较快， 并能支持群组 呼叫等功能。 参与 PTT集群呼叫的终端一般是特制的集群专用终端， 如果电 话终端（如固定电话、 CDMA手机、 GSM手机、 PHS手机、 3G手机等）、 SIP (会话建立协议， Session Initiation Protocol, 简称 SIP) 终端等设备 （这些终 端统称为电话终端） 也能加入 PTT集群呼叫中， 将极大扩展集群呼叫范围， 从而有效解决数字集群***无线网络覆盖不足等问题。 '
事实上， 现有集群通信***中已经提供了数字集群***和普通电话*** (包括固定电话***、 CDMA网络电话***、 GSM网络电话***、 PHS电话 ***、 下一代网络电话***等普通电话***）互联互通的功能， 即电话终端也 能参与到集群呼叫中，但这些数字集群***和普通电话***实现互联互通的方 法往往存在若干缺点， 如数字集群***和普通电话***互联时通常采用 No.7 信令， 实现的技术难度比较大； 专利申请号为 95116742.1 的 《基于程控交换 机的蜂窝式数字集群***的通信方法及***》的发明专利， 其整个集群的呼叫 控制点在程控交换机， 而不是在集群通信***中， 这样大大增加了***控制的 难度和复杂度。 发明内容
本发明所要解决的技术问题在于提供一种数字集群***与普通电话*** 实现互联互通的方法和***其能克服现有技术存在的数字集群***应用范围 窄、 技术实现难度大、 ***控制复杂度高的缺点， 能够扩大数字集群***应用 范围、 简化技术实现难度和控制复杂度、 解决电话终端参与集群呼叫的问题。
为了实现上述目的，本发明提供了一种实现数字集群***与普通电话*** 互联互通的方法， 其中， 包括：
电话终端作为主叫发起集群呼叫的步骤：软交换将该呼叫作为普通语音呼 叫并把请求转发给数字集群***的集群网关，由集群网关实现外部标准信令和 内部集群***信令之间的转换及媒体格式的转换；
电话终端作为被叫加入集群呼叫的步骤：调度服务器把寻呼电话终端的请 求发送给集群网关， 由集群网关通过普通电话***邀请电话终端加入呼叫， 在 集群网关中实现两种***间的信令格式以及媒体格式转换；
终端申请说话权的步骤： 电话终端请求通过集群网关转发给调度服务器， 由调度服务器根据当时所有终端申请说话权的请求情况将说话权授予电话终 端；
电话终端释放说话权的步骤：释放说话权的请求通过集群网关转发给调度 服务器； 和
电话终端退出集群呼叫的步骤。
上述的实现数字集群***与普通电话***互联互通的方法， 其中，所述电 话终端包括固定电话、 CDMA手机、 GSM手机、 3G手机、 PHS手机或 SIP 终端。
上述的实现数字集群***与普通电话***互联互通的方法， 其中，所述电 话终端退出集群呼叫的步骤包括：
电话终端主动退出集群呼叫的步骤：软交换把退出请求通过集群网关转发 给调度服务器， 然后调度服务器把电话终端从集群呼叫成员中删除； 或
数字集群***强制电话终端退出集群呼叫的步骤调度服务器通知集群网 关终止和电话终端的通话，集群网关按照普通电话的处理方式通知软交换结束 通话， 并释放为电话终端分配的网络资源。
上述的实现数字集群***与普通电话***互联互通的方法， 其中， 电话终 端通过按键的方式申请说话权和释放说话 电话终端通过挂断的方式主动退 出集群呼叫。
上述的实现数字集群***与普通电话***互联互通的方法， 其中， 电话终 端通过按 "* "、 "#"键申请说话权和释放说话权。
上述的实现数字集群***与普通电话***互联互通的方法， 其中，所述电 话终端作为主叫发起集群呼叫的步骤具体包括以下步骤：
步骤 11 : 电话终端拨集群呼叫的号码， 发起集群呼叫；
步骤 12: 软交换根据呼叫的群组号码分析出呼叫的归属地后， 向数字集 群***的集群网关发送邀请发起呼叫的信令， 被邀请的对象是呼叫号码； 步骤 13 : 集群网关向调度服务器转发发起呼叫的请求；
步骤 14: 调度服务器根据呼叫号码向集群归属寄存器鉴权， 如果鉴权不 通过则执行步骤 19， 否则将执行下一步；
步骤 15 : 调度服务器按照正常的集群呼叫流程寻呼各个集群终端， 寻呼 完毕后通知集群网关接受电话终端发起的呼叫请求；
步骤 16: 集群网关为电话终端建立本次呼叫分配媒体流资源； 步骤 17: 集群网关通知软交换接受电话终端的呼叫申请；
步骤 18 : 下一代网络为发起呼叫的电话终端分配网络资源并建立连接； 步骤 19: 调度服务器将向集群网关发送拒绝呼叫建立消息； 集群网关向 软交换发送拒绝消息； 软交换向电话终端发送建立呼叫失败消息。
上述的实现数字集群***与普通电话***互联互通的方法， 其中，所述步 骤 15具体包括以下步骤：
步骤 151 : 在认证通过的情况下， 调度服务器根据集群归属寄存器返回的 群组成员信息寻呼所有激活的集群无线终端；
步骤 152: 如果在调度服务器和集群信令网关间没有承载集群信令的传输 通道， 建立它们之间承载集群信令的通道；
步骤 153: 如果在调度服务器和集群媒体网关之间没有承载集群媒体流的 传输通道， 建立它们之间用于传输集群语音的通道； 步骤 154: 调度服务器通知集群信令网关呼叫建立完毕。
上述的实现数字集群***与普通电话***互联互通的方法， 其中，所述电 话终端作为被叫加入集群呼叫的步骤具体包括以下步骤：
步骤 21 : 集群终端或者电话终端发起建立集群呼叫；
步骤 22: 数字集群***呼叫本次呼叫包含的所有被叫终端；
步骤 23 : 如果调度服务器发现本次集群呼叫的被叫包括电话终端， 调度 服务器则向集群网关发送呼叫电话终端消息；
步骤 24: 集群网关根据电话终端的号码分析出其归属地的软交换并向该 软交换发送呼叫邀请；
步骤 25 : 软交换呼叫电话终端；
步骤 26: 电话终端摘机；
步骤 27: 软交换为该电话终端分配网络资源， 并向集群网关发送接受邀 请消息；
步骤 28: 集群网关通知调度服务器呼叫电话终端完毕， 电话终端被加入 到集群呼叫中。
上述的实现数字集群***与普通电话***互联互通的方法， 其中，终端申 请说话权的步骤中调度服务器根据当时所有终端申请说话权的请求情况将说 话权授予优先权最大的电话终端。
上述的实现数字集群***与普通电话***互联互通的方法， 其中，所述电 话终端申请说话权的步骤具体包括以下步骤：
步骤 31 : 启动***约定的申请说话权按键， 电话终端申请说活权； 步骤 32: 申请说话权的按键信息通过下一代网络媒体网关转发给集群网 关；
步骤 33 : 集群网关向调度服务器发送电话终端申请说话权的请求； 步骤 34 : 调度服务器根据优先级原则决定是否将说话权授予该电话终 端， 如果该电话终端可以获得说话权， 调度服务器则向集群网关发送授予说话 权消息， 否则调度服务器向集群网关发送拒绝授予说话权消息；
步骤 35 : 集群网关经过下一代网络媒体网关的中转通过语音提示的方式 告诉电话终端本次申请说话权是否成功。
上述的实现数字集群***与普通电话***互联互通的方法， 其中，所述优 先级原则是指调度服务器将说话权授予当前申请说话权用户的优先级最高的 用户， 其中当前正在说话的终端也要参与优先级的比较， 当优先级相同时， 先 申请说话权的终端优先获得说话权。
上述的实现数字集群***与普通电话***互联互通的方法， 其中，所述电 话终端释放说话权的步骤具体包括以下步骤：
步骤 41 : 按下***释放说话权按键， 启动电话终端释放说话权过程； 步骤 42: 释放说话权的按键信息通过下一代网络媒体网关转发给集群网 关；
步骤 43 : 集群网关向调度服务器发送电话终端释放说话权的请求； 步骤 44: 调度服务器收回说话权。
上述的实现数字集群***与普通电话***互联互通的方法， 其中， 除电话 终端可以主动释放说话权外， 数字集群***也可以主动释放电话终端的说话 权； 当说话权授予电话终端后， 如果电话终端超过***规定时间没有说话时， 或者电话终端的本次说话时间长度已经超过了数字集群***约定的每次最大 说话时长， 调度服务器有权直接释放电话终端的说话权。
上述的实现数字集群***与普通电话***互联互通的方法， 其中，所述电 话终端退出集群呼叫的步骤具体包括以下步骤：
步骤 51 : 当电话终端想退出呼叫时， 直接挂断电话；
步骤 52 : 软交换在电话终端挂断后向集群网关发送挂断消息；
步骤 53 : 集群网关通知集群调度服务器电话终端已退出呼叫；
步骤 54: 调度服务器将根据此指示把电话终端从呼叫成员中删除。
上述的实现数字集群***与普通电话***互联互通的方法， 其中，所述数 字集群***强制电话终端退出集群呼叫的步骤具体包括以下步骤：
步骤 61 : 调度服务器通知集群网关， 让指定电话终端退出集群呼叫； 步骤 62: 集群网关通知软交换释放指定的电话终端；
步骤 63 : 软交换通知电话终端呼叫结束；
步骤 64: 软交换释放先前为该电话终端分配的网络资源；
步骤 65 : 软交换应答集群网关， 释放电话终端完毕；
步骤 66: 集群网关释放先前为该电话终端分配的网络资源；
步骤 67: 集群网关应答调度服务器， 电话终端已经退出集群呼叫。 上述的实现数字集群***与普通电话***互联互通的方法， 其中，集群网 关和下一代网络连接时， 采用 H.323 协议或 SIP协议实现信令交互， 采用 RTP/RTCP协议传输语音媒体流；集群信令网关采用 Megaco协议或 MGCP协 议控制集群媒体网关。
上述的实现数字集群***与普通电话***互联互通的方法， 其中，如果用 户发起的是集群组呼， 那么用户拨的号码是集群群组号码， 该群组号码对应于 两个或者两个以上的集群用户， 调度服务器将把多个用户加入到本次呼叫中； 如果发起的是集群私密呼叫， 那么用户拨的号码是被叫用户的集群号码， 仅对 应于一个集群用户。
为了更好的实现上述目的，本发明还提供了一种实现数字集群***与普通 电话***互联互通的***， 包括由集群终端、基站、 调度服务器、集群归属寄 存器、集群信令网关、集群媒体网关组成的数字集群***和由软交换模块、下 一代网络媒体网关、 电话终端组成的下一代网络***， 其中：
电话终端作为主叫发起集群呼叫，软交换模块将该呼叫作为普通语音呼叫 把请求转发给数字集群***的集群网关，集群网关实现外部标准信令和内部集 群***信令之间的转换及媒体格式的转换；
电话终端作为被叫加入集群呼叫，调度服务器把寻呼电话终端的请求发送 给集群网关， 由集群网关通过下一代网络***邀请电话终端加入呼叫， 在集群 网关中实现两种***间的信令格式以及媒体格式转换；
电话终端申请说话权， 电话终端请求通过集群网关转发给调度服务器， 由 调度服务器根据当时所有终端申请说话权的请求情况将说话权授予电话终端； 电话终端释放说话权的请求通过集群网关转发给调度服务器； 和 电话终端通过集群网关退出集群呼叫。
上述的实现数字集群***与普通电话***互联互通的***， 其中： 集群终端、 基站并不需要和普通电话***发生直接的信令和语音的交互， 无需关心呼叫中是否有普通电话终端参与；
调度服务器负责维护集群终端和普通电话终端参与的集群呼叫，和集群信 令网关进行信令交互完成对普通电话的集群呼叫控制，和集群媒体网关进行媒 体交互完成与普通电话相关的语音转发工作；
集群归属寄存器负责维护集群终端和普通电话终端的终端类型、用户信息 以及群组信息， 对集群终端和普通电话终端进行集群呼叫的鉴权和计费； 集群信令网关主要承担集群***和普通电话***间的信令翻译工作，和软 交换模块进行信令交互完成集群呼叫的接续控制， 控制集群媒体网关的资源， 维护和调度服务器之间的通信链路；
集群媒体网关主要承担分发语音媒体流，维护和调度服务器之间的语音链 路，承担语音媒体流在数字集群***和普通电话***间的格式转换，播放提示 音等工作；
软交换模块负责维护普通电话终端的呼叫，和集群信令网关进行信令交互 完成集群呼叫的接续控制， 控制下一代网络媒体网关的资源；
下一代网络媒体网关主要承担接受软交换模块的控制， 转发语音媒体流； 电话终端可作为集群呼叫的终端参与集群呼叫，即可以作为主叫发起集群 呼叫， 也可以作为被叫被动地参与集群呼叫。
上述的实现数字集群***与普通电话***互联互通的***，其中， 电话终 端作为主叫发起集群呼叫时，
电话终端拨集群呼叫的号码， 发起集群呼叫；
软交换模块根据呼叫的群组号码分析出呼叫的归属地后， 向数字集群*** 的集群网关发送邀请发起呼叫的信令， 被邀请的对象是呼叫号码；
集群网关向调度服务器转发发起呼叫的请求；
调度服务器根据呼叫号码向集群归属寄存器鉴权， 如果鉴权不通过， 调度 服务器将向集群网关发送拒绝呼叫建立消 E;集群网关向软交换模块发送拒绝 消息； 软交换模块向电话终端发送建立呼叫失败消息；
鉴权通过，调度服务器按照正常的集群呼叫流程寻呼各个集群终端， 寻呼 完毕后通知集群网关接受电话终端发起的呼叫请求；
集群网关为电话终端建立本次呼叫分配媒体流资源；
集群网关通知软交换模块接受电话终端的呼叫申请；
下一代网络为发起呼叫的电话终端分配网络资源并建立连接。
上述的实现数字集群***与普通电话***互联互通的***，其中， 电话终 端作为被叫加入集群呼叫时，
集群终端或者电话终端发起建立集群呼叫；
数字集群***呼叫本次呼叫包含的所有被叫终端； 如果调度服务器发现本次集群呼叫的被叫包括电话终端，调度服务器则向 集群网关发送呼叫电话终端消息；
集群网关根据电话终端的号码分析出其归属地的软交换模块并向该软交 换模块发送呼叫邀请；
软交换模块呼叫电话终端；
电话终端摘机；
软交换模块为电话终端分配网络资源， 并向集群网关发送接受邀请消息； 集群网关通知调度服务器呼叫电话终端完毕， 电话终端加入集群呼叫中。 上述的实现数字集群***与普通电话***互联互通的***，其中，所述电 话终端申请说话权时，
电话终端启动***约定的申请说话权按键申请说话权；
申请说话权的按键信息通过下一代网络媒体网关转发给集群网关； 集群网关向调度服务器发送电话终端申请说话权的请求；
调度服务器根据优先级原则决定是否将说话权授予该电话终端，如果该电 话终端可以获得说话权， 调度服务器则向集群网关发送授予说话权消息， 否则 调度服务器向集群网关发送拒绝授予说话权消息；
集群网关经过下一代网络媒体网关的中转通过语音提示的方式告诉电话 终端本次申请说话权是否成功。
上述的实现数字集群***与普通电话***互联互通的***，其中， 电话终 端释放说话权时，
电话终端按下***释放说话权按键启动释放说话权过程；
释放说话权的按键信息通过下一代网络媒体网关转发给集群网关； 集群网关向调度服务器发送电话终端释放说话权的请求；
调度服务器收回说话权。
上述的实现数字集群***与普通电话***互联互通的***，其中，所述电 话终端主动退出集群呼叫时，
电话终端直接挂断电话；
软交换模块在电话终端挂断后向集群网关发送挂断消息；
集群网关通知集群调度服务器电话终端已退出呼叫；
调度服务器将根据此指示把电话终端从呼叫成员中删除。 上述的实现数字集群***与普通电话***互联互通的***，其中，所述数 字集群***强制电话终端退出集群呼叫时，
调度服务器通知集群网关， 让指定电话终端退出集群呼叫；
集群网关通知软交换模块释放指定的电话终端；
软交换模块通知电话终端呼叫结束；
软交换模块释放先前为该电话终端分配的网络资源；
软交换模块应答集群网关， 释放电话终端完毕；
集群网关释放先前为该电话终端分配的网络资源；
集群网关应答调度服务器， 电话终端已经退出集群呼叫。
上述的实现数字集群***与普通电话***互联互通的***，其中，集群网 关和下一代网络连接时， 采用 H.323 协议或 SIP协议实现信令交互， 采用 RTP RTCP协议传输语音媒体流；集群信令网关釆用 Megaco协议或 MGCP协 议控制集群媒体网关。
上述的实现数字集群***与普通电话***互联互通的***，其中，如果用 户发起的是集群组呼， 那么用户拨的号码是集群群组号码， 该群组号码对应于 两个或者两个以上的集群用户， 调度服务器将把多个用户加入到本次呼叫中； 如果发起的是集群私密呼叫， 那么用户拨的号码是被叫用户的集群号码， 仅对 应于一个集群用户。
本发明的数字集群***与普通电话***实现互联互通的方法和***中数 字集群***主要通过下一代网络实现和普通电话***的互联互通 即数字集群 ***提供和下一代网络的互联互通接口，通过下一代网络连接最终的电话*** 网络。数字集群***中集群网关主要承担着数字集群***与下一代网络间的信 令格式转换和媒体格式转换的功能。当普通电话***把信令或者媒体发给数字 集群***时， 集群网关将其转换成数字集群***的格式， 当数字集群***把信 令或者媒体发给普通电话***时， 集群网关将其转换成普通电话***的格式， 从而解决两种通信***间的信令以及媒体格式的差异。本发明中， 数字集群系 统和普通电话***互联互通的方案采用标准的 IP信令协议， 普通电话***无 需针对集群业务做任何改动， 从而具有实现方法简单、有效扩大数字集群*** 应用范围、 并能解决电话终端参与集群呼叫中等优点。
以下结合附图和具体实施例对本发明进行详细描述但不作为对本发明的 限定。
附图说明
图 1是本发明数字集群***和普通电话***互联互通网络结构图。
图 2 (a) 是本发明数字集群***和普通电话***互联互通协议接口图。 图 2 (b) 是本发明集群网关对外协议接口图。
图 3是本发明所述电话终端作为集群组呼主叫的组呼建立流程图。
图 4是本发明电话终端作为集群组呼被叫的组呼建立流程图。
图 5是本发明电话终端申请说话权的处理流程图。
图 6是本发明电话终端释放说话权的处理流程图。
图 7是本发明电话终端退出集群呼叫的处理流程图。
图 8是本发明数字集群***强制电话终端退出集群呼叫的处理流程图。 具体实施方式
下面结合附图和具体实施方式对本发明所述方法作进一步描述。
传统的固定电话***大多建立在 No.7信令基础上的模拟电话***， 随着
IP技术的迅猛发展， 以 VoIP (Voice over IP， 简称 VoIP) 技术为基础的 NGN 将成为未来语音业务的发展方向， 为了与未来的技术发展保持一致， 数字集群 ***与普通电话***的互联互通将采用 VoIP技术与 NGN (Next Generation Network, 下一代网络）进行互联互通， 从而实现数字集群***与普通电话系 统的互联互通。 NGN 网络已经提供了与传统的电路交换电话网络的互通方 法， 因此通过 NGN网络的转接， 本方案也可以完成数字集群***与模拟电话 ***的互联互通。本发明中，普通电话***包括传统的模拟电话***和基于 IP 的 NGN网络， 只是集群***和模拟电话***互通时是通过 NGN实现的。
本发明所述的数字集群***与普通电话网络互联互通的方法包括电话终 端作为主叫发起集群呼叫、 电话终端作为被叫加入集群呼叫、 电话终端申请说 话权、 电话终端释放说话权、 电话终端主动退出集群呼叫以及数字集群***强 制电话终端退出集群呼叫等几种方法。
同时在以下的描述中， 将着重介绍数字集群***的处理流程， NGN中对 应的处理流程不作为描述重点。
数字集群***与普通电话***互联互通的网络结构图如图 1所示。 在实现互联互通的过程中， 集群网关 1起到了非常重要的作用。
如图 2 (a) 和图 2 (b)所示， 集群网关 1从逻辑上讲可分成集群信令网 关 11和集群媒体网关 12两个设备， 其中集群信令网关 11承担的主要功能如 下： 和其他通信***对接时的信令网关， 如和 NGN、 PoC (PTT over Cellular, 一种数字集群***）等***； 不同服务区之间漫游的信令网关； 控制集群媒体 网关； 维护和调度服务器之间的通信链路。
集群媒体网关 12承担的主要功能如下： 分发语音媒体流； 维护和调度服 务器之间的语音链路承担语音媒体流在数字集群***和普通电话***间的格 式转换； 及播放提示音。
如图 2 (a) 所示， 集群网关 1和 NGN网络连接时， 通常可以采用 H.323 协议或者 SIP 协议实现信令的交互， 采用 RTP/RTCP (Real-time Transport Protocol/RTP Control Protocol) 协议传输语音媒体流。 集群网关 1中， 集群信 令网关 11 可以釆用 Megaco (下一代网络媒体网关控制， Media Gateway Control简称 Megaco)协议或者 MGCP (下一代网络媒体网关控制协 i义 Media Gateway Control Protocol, 简称 MGCP)协议控制集群媒体网关 12。
终端语音的单工是集群业务的基本语音特 即在通常情况下集群终端在 讲话时不能听到其他用户的讲话， 在同一时刻只会有一个人可以说话， 为了操 作方 ί¾数字集群***通过集群信令网关控制集群媒体网关中各媒体流的传输 方向来实现语音的单工特点， 即在某终端获得说话权时， 随即设定该终端对应 的媒体流方向只能发送， 不能接收， 对于正在聆听的用户， 这些终端对应的媒 体流方向只能接收， 不能发送， 缺省情况下电话终端对应的媒体流传输方向是 只能接收， 不能发送， 即处于聆听状态， 没有获得说话权。对于某些特殊终端， 他的语音可以是双工的， 在这种情况下， 集群信令网关设置集群媒体网关的媒 体流方向为双向的， 即既可以发送， 也可以接收。
下面就结合附图分别描述一下电话终端作为主叫发起集群呼叫、电话终端 作为被叫加入集群组呼、 电话终端申请说话权、 电话终端释放说话权、 电话终 端退出集群呼叫以及数字集群***强制电话终端退出集群呼叫等几种方法。
如图 3所示， 电话终端作为集群组呼的发起者时， 集群组呼的建立流程是 这样的：
步骤 301 : 电话终端拨集群组呼的号码， 发起集群组呼； 步骤 302: 软交换根据电话拨的集群组呼号码分析出该号码的归属地后， 将向数字集群***的集群信令网关发送邀请请求；
步骤 303 : 集群信令网关告诉软交换正在尝试建立呼叫；
步骤 304: 集群信令网关向调度服务器发送集群呼叫请求消息， 告知有电 话终端发起集群组呼；
步骤 305: 调度服务器向集群归属寄存器发送接入认证请求， 对电话终端 进行认证并验证集群组呼号码的正确性；
步骤 306: 如果认证通过， 集群归属寄存器将向调度服务器发送接入认证 应答消息， 同时将本组呼的所有群组成员的信息通知给调度服务器， 否则调度 归属寄存器将拒绝电话终端的组呼请求；
步骤 307: 在认证通过的情况下， 调度服务器根据集群归属寄存器返回的 群组成员信息寻呼所有激活的集群无线终端，在终端寻呼应答确认后将这些终 端加入到本集群呼叫中；
步骤 308: 如果在调度服务器和集群信令网关间没有承载集群信令的传输 通道， 它们之间将建立承载集群信令的通道；
步骤 309: 如果在调度服务器和集群媒体网关之间没有承载集群媒体流的 传输通道， 它们之间将建立用于传输集群语音的通道；
步骤 3 ΐα完成上述工作后，调度服务器通知集群信令网关呼叫建立完毕； 步骤 311 : 集群信令网关通过与集群媒体网关信令交互， 通知集群媒体网 关分配本次组呼的媒体流的资源， 包括分配媒体流上下文、 端子等等；
步骤 312: 随后集群信令网关通知软交换呼叫建立成功；
步骤 313: 软交换通过与下一代网络媒体网关信令交互， 通知下一代网络 媒体网关分配本次呼叫的媒体流的资源， 包括分配媒体流的上下文、 端子等； 步骤 314: 下一代网络媒体网关通知电话终端呼叫建立成功；
步骤 315: 调度服务器通知集群信令网关， 本次集群呼叫的说话权已授予 呼叫的发起者， 即电话终端；
步骤 316: 集群信令网关修改集群媒体网关中电话终端对应的媒体流属性 改成只能接收， 这样只有电话终端发出的媒体流才能通过；
步骤 317: 集群媒体网关通过下一代网络媒体网关向电话终端发送语音提 示， 即告知电话终端获得说话权， 电话终端开始讲话。 在集群呼叫中， 电话终端作为被叫的情形一般有两种， 一种是电话终端被 包含集群呼叫的群组中， 但他又不是作为集群呼叫的发起者， 另外一种是集群 呼叫是一对一的私密呼叫， 并且电话终端就是被呼叫的对象。 如图 4所示， 电 话终端作为被叫的建立流程是这样的：
步骤 401 : 终端发起集群组呼的呼叫， 发起者可以是普通的集群终端， 也 可以是电话终端；
步骤 402: 调度服务器向集群归属寄存器发送接入认证请求， 对本次组呼 进行认证；
步骤 403: 如果呼叫认证通过， 集群归属寄存器将向调度服务器发送接入 认证应答消息， 同时将本组呼的所有群组成员的信息告诉调度服务器， 否则将 拒绝本次集群组呼；
步骤 404: 调度服务器根据反馈的群组成员信息寻呼所有激活的集群无线 终端；
步骤 405: 调度服务器发现群组需要被寻呼的用户中包括电话终端， 调度 服务器向集群信令网关发送呼叫连接请求， 被连接对象是电话终端；
步骤 406: 集群信令网关向软交换发送邀请请求， 被邀请的对象是电话终 端；
步骤 407: 软交换回应集群信令网关正在尝试呼叫电话终端；
步骤 408: 接着软交换通过与下一代网络媒体网关信令交互， 通知下一代 网络媒体网关分配本次呼叫的媒体流的资源， 包括分配媒体流的上下文、端子 等等；
步骤 409: 下一代网络媒体网关向电话终端发送振铃消息；
步骤 410: 被叫用户摘机确认加入本次组呼；
步骤 411 : 软交换通知集群信令网关已经呼叫电话终端完毕， 确认电话终 端已加入到组呼当中；
步骤 412: 集群信令网关把向调度服务器转达已经把电话终端寻呼进本次 集群呼叫中；
步骤 413: 如果在调度服务器和集群信令网关间没有承载集群信令的传输 通道， 它们之间将建立承载集群信令的通道；
步骤 414: 如果在调度服务器和集群媒体网关之间没有承载集群媒体流的 传输通道， 它们之间将建立用于传输集群语音的通道；
步骤 415: 集群信令网关通过与集群媒体网关信令交互， 通知集群媒体网 关分配本次组呼的媒体流的资源， 包括分配媒体流上下文、 端子等等；
步骤 416 : 调度服务器通知集群信令网关将说话权授予集群呼叫的发起 者， 由于集群媒体网关中缺省的媒体流方向已经是只能发送， 所以本次授予说 话权集群信令网关无需修改媒体流方向；
步骤 417: 调度服务器通知组呼发起者， 已将说话权授予给它， 可以开始 讲话。
电话终端和集群终端均可以申请说话 ¾它们的申请被统一地发送给调度 服务器， 由调度服务器进行裁决。 下面结合图 5、 图 6分别介绍电话终端申请 说话权和电话终端释放说话权权的流程。
图 5描述的是电话终端申请说话权的处理流程， 包括以下步骤： 步骤 501 : 电话终端申请获得说话权， 电话终端可按下***约定的申请说 话权的按键， 申请获得说话权， 比如" *"、 等等， 这些都可以作为申请说 话权的按键；
步骤 502 : 下一代网络媒体网关向集群媒体网关转发电话终端的按键信 息， 其通过 RTP流发送；
步骤 503: 集群媒体网关通过集群信令网关向调度服务器转发电话终端申 请说话权的请求；
步骤 504: 调度服务器根据***约定的原则判断电话终端此时是否可以获 得说话权， 如果可以获得说话权， 则执行 5041， 否则执行 5042。 调度服务器 通常把说话权授予当前申请说话权用户的优先级最高的用户， 当前正在说话的 终端也要参与比较， 当优先级相同时， 先申请说话权的终端优先获得说话权； 步骤 5041 : 在申请说话权的电话终端可以获得说话权的情况下， 如果此 时的说话权已经授予了普通集群终端， 调度服务器将执行 506， 否则直接执行 507；
步骤 506: 调度服务器释放集群终端的说话权；
步骤 507: 调度服务器通知集群信令网关本次说话权授予电话终端； 步骤 508: 集群信令网关修改集群媒体网关中该电话终端对应的媒体流传 输方向， 使其只能接收， 即集群媒体网关只负责转发由电话终端发出的语音报 文；
步骤 509: 集群媒体网关通过下一代网络媒体网关提示电话终端授予说话 权成功， 接着执行 511 ;
步骤 5042: 如果此时电话终端不可以获得说话权， 调度服务器将通过集 群信令网关拒绝本次说话权的申请；
步骤 510: 集群媒体网关通过下一代网络媒体网关语音提示电话终端， 本 次说话权申请被拒绝， 接着执行 511 ;
步骤 511 : 结束。
图 6描述的是电话终端释放说话权的处理流程， 包括以下步骤： 步骤 601 : 电话终端按下***约定的释放说话权的按键释放说话权， 如
"*"、 等都可以作为释放说话权的按键；
步骤 602下一代网络媒体网关将释放说话权的按键信息通过 RTP流发送 给集群媒体网关；
步骤 603 : 集群媒体网关通知集群信令网关， 电话终端释放说话权； 步骤 604: 集群信令网关通知调度服务器， 电话终端释放说话权； 步骤 605 : 调度服务器回收说话权。
除电话终端可以主动释放说话权外，数字集群***也可以主动释放电话终 端的说话权。 当说话权授予电话终端后， 如果电话终端超过***规定时间没有 说话时，或者电话终端的本次说话时间长度已经超过了数字集群***约定的每 次最大说话时长， 调度服务器将直接释放电话终端的说话权， 无需等到电话终 端主动释放本次说话权。
图 7描述的是电话终端退出集群呼叫的方法， 包括以下步骤：
步骤 701 : 当电话终端想退出组呼时， 可以直接挂断电话；
步骤 702 : 软交换会在电话终端挂断后向集群信令网关发送结束呼叫消 息；
歩骤 703 : 集群信令网关通知调度服务器电话终端已退出组呼； 步骤 704: 调度服务器将根据此指示把电话终端从集群呼叫成员中删除。 图 8描述的是数字集群***强制电话终端退出集群呼叫的方法包括以下 步骤：
步骤 801 : 调度服务器通知集群信令网关， 让指定的电话终端退出集群呼 叫；
步骤 802: 集群信令网关通知软交换释放指定的电话终端；
步骤 803 : 软交换通知电话终端呼叫结束；
步骤 804: 软交换通知下一代网络媒体网关释放先前为该电话终端分配的 网络资源；
步骤 805 : 软交换应答集群网关， 释放电话终端完毕；
步骤 806: 集群信令网关通知集群媒体网关释放先前为该电话终端分配的 网络资源；
步骤 807: 集群信令网关应答调度服务器， 电话终端已经退出集群呼叫。 在以上的方案描述中，主要以集群组呼为例对数字集群***和普通电话系 统互联互通进行了描 这种方法同样可以用于数字集群***和普通电话*** 互联互通的集群私密呼叫， 不同点仅在于私密呼叫发生在两个终端之间， 而组 呼的终端可以有多个。 在呼叫建立流程上， 它们的建立流程是基本一致的， 申 请说话权和释放说话权的方法也是一致的。
另外， 一次集群组呼呼叫过程中， 电话终端可以有多个， 即参加集群组呼 的电话终端的个数没有什么限制， 以上的方案描述中以一个电话终端为例对数 字集群***和普通电话***的互联互通进行了描述这种方法同样也适用于多 个电话终端的情形。 在集群媒体网关中， 一个组呼将分配一个上下文与其对 应， 在这个上下文中可以有多个端子， 一个端子对应于一个电话终端， 集群信 令网关承担着上下文、媒体流端子以及电话终端与集群呼叫之间的关系。 当有 一个电话终端被授予说话权时，集群信令网关将把集群媒体网关中该发言者对 应的媒体流传输方向被设置成只能接 而其他电话终端对应的媒体流传输方 向设置成只能发送。 当说话权被授予集群终端时， 集群信令网关将把集群媒体 网关中所有电话终端对应的媒体流传输方向设置成只能发送。
本发明的实现数字集群***与普通电话***互联互通的***中： 集群终端、 基站并不需要和普通电话***发生直接的信令和语音的交互， 无需关心呼叫中是否有普通电话终端参与；
调度服务器负责维护集群终端和普通电话终端参与的集群呼叫，和集群信 令网关进行信令交互完成对普通电话的集群呼叫控制，和集群媒体网关进行媒 体交互完成与普通电话相关的语音转发工作； 集群归属寄存器负责维护集群终端和普通电话终端的终端类型、用户信息 以及群组信息， 对集群终端和普通电话终端进行集群呼叫的鉴权和计费； 集群信令网关主要承担集群***和普通电话***间的信令翻译工作，和软 交换模块进行信令交互完成集群呼叫的接续控制， 控制集群媒体网关的资源， 维护和调度服务器之间的通信链路；
集群媒体网关主要承担分发语音媒体流，维护和调度服务器之间的语音链 路，承担语音媒体流在数字集群***和普通电话***间的格式转换，播放提示 音等工作；
软交换模块负责维护普通电话终端的呼叫，和集群信令网关进行信令交互 完成集群呼叫的接续控制， 控制下一代网络媒体网关的资源；
下一代网络媒体网关主要承担接受软交换模块的控制， 转发语音媒体流； 电话终端可作为集群呼叫的终端参与集群呼叫，即可以作为主叫发起集群 呼叫， 也可以作为被叫被动地参与集群呼叫。
当然， 本发明还可有其他多种实施例， 在不背离本发明精神及其实质的情 况下， 熟悉本领域的技术人员当可根据本发明作出各种相应的改变和变形， 但 这些相应的改变和变形都应属于本发明所附的权利要求的保护范围。 工业应用性
本发明的数字集群***与普通电话***实现互联互通的方法和***中数 字集群***主要通过下一代网络实现和普通电话***的互联互 即数字集群 ***提供和下一代网络的互联互通接口，通过下一代网络连接最终的电话*** 网络。数字集群***中集群网关主要承担着数字集群***与下一代网络间的信 令格式转换和媒体格式转换的功能。当普通电话***把信令或者媒体发给数字 集群***时， 集群网关将其转换成数字集群***的格式， 当数字集群***把信 令或者媒体发给普通电话***时， 集群网关将其转换成普通电话***的格式， 从而解决两种通信***间的信令以及媒体格式的差异。本发明中， 数字集群系 统和普通电话***互联互通的方案采用标准的 IP信令协议， 普通电话***无 需针对集群业务做任何改动， 从而具有实现方法简单、有效扩大数字集群*** 应用范围、 并能解决电话终端参与集群呼叫中的问题。

Claims

权利要求书
1、 一种实现数字集群***与普通电话***互联互通的方法， 其特征在于， 包括：
电话终端作为主叫发起集群呼叫的步骤：软交换将该呼叫作为普通语音呼 叫并把请求转发给数字集群***的集群网关，由集群网关实现外部标准信令和 内部集群***信令之间的转换及媒体格式的转换；
电话终端作为被叫加入集群呼叫的步骤：调度服务器把寻呼电话终端的请 求发送给集群网关， 由集群网关通过普通电话***邀请电话终端加入呼叫， 在 集群网关中实现两种***间的信令格式以及媒体格式转换；
终端申请说话权的步骤： 电话终端请求通过集群网关转发给调度服务器， 由调度服务器根据当时所有终端申请说话权的请求情况将说话权授予电话终 山 电话终端释放说话权的步骤：释放说话权的请求通过集群网关转发给调度 服务器； 和
电话终端退出集群呼叫的步骤。
2、 根据权利要求 1所述的实现数字集群***与普通电话***互联互通的 方法， 其特征在于， 所述电话终端包括固定电话、 CDMA手机、 GSM手机、 3G手机、 PHS手机或 SIP终端。
3、 根据权利要求 1所述的实现数字集群***与普通电话***互联互通的 方法， 其特征在于， 所述电话终端退出集群呼叫的步骤包括：
电话终端主动退出集群呼叫的步骤：软交换把退出请求通过集群网关转发 给调度服务器， 然后调度服务器把电话终端从集群呼叫成员中删除； 或
数字集群***强制电话终端退出集群呼叫的步骤调度服务器通知集群网 关终止和电话终端的通话，集群网关按照普通电话的处理方式通知软交换结束 通话， 并释放为电话终端分配的网络资源。
4、 根据权利要求 3所述的实现数字集群***与普通电话***互联互通的 方法， 其特征在于， 电话终端通过按键的方式申请说话权和释放说话权， 电话 终端通过挂断的方式主动退出集群呼叫。
5、 根据权利要求 4所述的实现数字集群***与普通电话***互联互通的 方法， 其特征在于， 电话终端通过按 " *"、 "#"键申请说话权和释放说话权。
6、 根据权利要求 1所述的实现数字集群***与普通电话***互联互通的 方法， 其特征在于， 所述电话终端作为主叫发起集群呼叫的步骤具体包括以下 步骤：
步骤 11 : 电话终端拨集群呼叫的号码， 发起集群呼叫；
步骤 12: 软交换根据呼叫的群组号码分析出呼叫的归属地后， 向数字集 群***的集群网关发送邀请发起呼叫的信令， 被邀请的对象是呼叫号码； 步骤 13 : 集群网关向调度服务器转发发起呼叫的请求；
步骤 14: 调度服务器根据呼叫号码向集群归属寄存器鉴权， 如果鉴权不 通过则执行步骤 19， 否则将执行下一步；
步骤 15 : 调度服务器按照正常的集群呼叫流程寻呼各个集群终端， 寻呼 完毕后通知集群网关接受电话终端发起的呼叫请求；
步骤 16: 集群网关为电话终端建立本次呼叫分配媒体流资源；
步骤 17: 集群网关通知软交换接受电话终端的呼叫申请；
步骤 18 : 下一代网络为发起呼叫的电话终端分配网络资源并建立连接； 步骤 19: 调度服务器将向集群网关发送拒绝呼叫建立消息； 集群网关向 软交换发送拒绝消息； 软交换向电话终端发送建立呼叫失败消息。
7、 根据权利要求 6所述的实现数字集群***与普通电话***互联互通的 方法， 其特征在于， 所述步骤 15具体包括以下步骤：
步骤 151 : 在认证通过的情况下， 调度服务器根据集群归属寄存器返回的 群组成员信息寻呼所有激活的集群无线终端；
步骤 152: 如果在调度服务器和集群信令网关间没有承载集群信令的传输 通道， 建立它们之间承载集群信令的通道；
步骤 153: 如果在调度服务器和集群媒体网关之间没有承载集群媒体流的 传输通道， 建立它们之间用于传输集群语音的通道；
步骤 154: 调度服务器通知集群信令网关呼叫建立完毕。
8、 根据权利要求 1所述的实现数字集群***与普通电话***互联互通的 方法， 其特征在于， 所述电话终端作为被叫加入集群呼叫的步骤具体包括以下 步骤：
步骤 21 : 集群终端或者电话终端发起建立集群呼叫； 步骤 22: 数字集群***呼叫本次呼叫包含的所有被叫终端；
步骤 23 : 如果调度服务器发现本次集群呼叫的被叫包括电话终端， 调度 服务器则向集群网关发送呼叫电话终端消息；
步骤 24 : 集群网关根据电话终端的号码分析出其归属地的软交换并向该 软交换发送呼叫邀请；
步骤 25 : 软交换呼叫电话终端；
步骤 26: 电话终端摘机；
步骤 27: 软交换为该电话终端分配网络资源， 并向集群网关发送接受邀 请消息；
步骤 28 : 集群网关通知调度服务器呼叫电话终端完毕， 电话终端被加入 到集群呼叫中。
9、 根据权利要求 1所述的实现数字集群***与普通电话***互联互通的 方法， 其特征在于， 终端申请说话权的步骤中调度服务器根据当时所有终端申 请说话权的请求情况将说话权授予优先权最大的电话终端。
10、根据权利要求 9所述的实现数字集群***与普通电话***互联互通的 方法， 其特征在于， 所述电话终端申请说话权的步骤具体包括以下步骤： 步骤 31 : 启动***约定的申请说话权按键， 电话终端申请说话权； 步骤 32: 申请说话权的按键信息通过下一代网络媒体网关转发给集群网 关；
步骤 33 : 集群网关向调度服务器发送电话终端申请说话权的请求； 步骤 34 : 调度服务器根据优先级原则决定是否将说话权授予该电话终 端， 如果该电话终端可以获得说话权， 调度服务器则向集群网关发送授予说话 权消息， 否则调度服务器向集群网关发送拒绝授予说话权消息；
步骤 35 : 集群网关经过下一代网络媒体网关的中转通过语音提示的方式 告诉电话终端本次申请说话权是否成功。
11、 根据权利要求 10所述的实现数字集群***与普通电话***互联互通 的方法， 其特征在于， 所述优先级原则是指调度服务器将说话权授予当前申请 说话权用户的优先级最高的用户，其中当前正在说话的终端也要参与优先级的 比较， 当优先级相同时， 先申请说话权的终端优先获得说话权。
12、根据权利要求 1所述的实现数字集群***与普通电话***互联互通的 方法， 其特征在于， 所述电话终端释放说话权的步骤具体包括以下步骤： 步骤 41 : 按下***释放说话权按键， 启动电话终端释放说话权过程； 步骤 42: 释放说话权的按键信息通过下一代网络媒体网关转发给集群网 关； '
步骤 43 : 集群网关向调度服务器发送电话终端释放说话权的请求； 步骤 44: 调度服务器收回说话权。
13、 根据权利要求 12所述的实现数字集群***与普通电话***互联互通 的方法， 其特征在于， 除电话终端可以主动释放说话权外， 数字集群***也可 以主动释放电话终端的说话权； 当说话权授予电话终端后， 如果电话终端超过 ***规定时间没有说话时，或者电话终端的本次说话时间长度已经超过了数字 集群***约定的每次最大说话时长调度服务器有权直接释放电话终端的说话 权。
1 根据权利要求 3所述的实现数字集群***与普通电话***互联互通的 方法， 其特征在于， 所述电话终端退出集群呼叫的步骤具体包括以下步骤： 步骤 51 : 当电话终端想退出呼叫时， 直接挂断电话；
步骤 52: 软交换在电话终端挂断后向集群网关发送挂断消息； 步骤 53 : 集群网关通知集群调度服务器电话终端巳退出呼叫； 步骤 54: 调度服务器将根据此指示把电话终端从呼叫成员中删除。
15,根据权利要求 3所述的实现数字集群***与普通电话***互联互通的 方法， 其特征在于， 所述数字集群***强制电话终端退出集群呼叫的步骤具体 包括以下步骤：
步骤 61 : 调度服务器通知集群网关， 让指定电话终端退出集群呼叫； 步骤 62: 集群网关通知软交换释放指定的电话终端；
步骤 63 : 软交换通知电话终端呼叫结束；
步骤 64: 软交换释放先前为该电话终端分配的网络资源；
步骤 65: 软交换应答集群网关， 释放电话终端完毕；
步骤 66: 集群网关释放先前为该电话终端分配的网络资源；
步骤 67: 集群网关应答调度服务器， 电话终端已经退出集群呼叫。
16,根据权利要求 1所述的实现数字集群***与普通电话***互联互通的 方法， 其特征在于， 集群网关和下一代网络连接时， 釆用 H.323协议或 SIP协 议实现信令交互， 采用 RTP/RTCP协议传输语音媒体流； 集群信令网关采用 Megaco协议或 MGCP协议控制集群媒体网关。
17、 根据权利要求 1到 16其中任意一项所述的实现数字集群***与普通 电话***互联互通的方法， 其特征在于， 如果用户发起的是集群组呼， 那么用 户拨的号码是集群群组号码， 该群组号码对应于两个或者两个以上的集群用 户， 调度服务器将把多个用户加入到本次呼叫中； 如果发起的是集群私密呼 叫， 那么用户拨的号码是被叫用户的集群号码， 仅对应于一个集群用户。
18、一种实现数字集群***与普通电话***互联互通的***， 包括由集群 终端、 基站、 调度服务器、 集群归属寄存器、集群信令网关、 集群媒体网关组 成的数字集群***和由软交换模块、下一代网络媒体网关、电话终端组成的下 一代网络***， 其特征在于：
电话终端作为主叫发起集群呼叫，软交换模块将该呼叫作为普通语音呼叫 把请求转发给数字集群***的集群网关，集群网关实现外部标准信令和内部集 群***信令之间的转换及媒体格式的转换；
电话终端作为被叫加入集群呼叫，调度服务器把寻呼电话终端的请求发送 给集群网关， 由集群网关通过下一代网络***邀请电话终端加入呼叫， 在集群 网关中实现两种***间的信令格式以及媒体格式转换；
电话终端申请说话权， 电话终端请求通过集群网关转发给调度服务器， 由 调度服务器根据当时所有终端申请说话权的请求情况将说话权授予电话终端； 电话终端释放说话权的请求通过集群网关转发给调度服务器； 和 电话终端通过集群网关退出集群呼叫。
19、 根据权利要求 18所述的实现数字集群***与普通电话***互联互通 的***， 其特征在于， 所述电话终端通过集群网关退出集群呼叫时，
软交换模块把电话终端主动退出集群呼叫的请求通过集群网关转发给调 度服务器， 调度服务器把电话终端从集群呼叫成员中删除； 或
调度服务器通知集群网关终止和电话终端的通话，集群网关按照普通电话 的处理方式通知软交换模块结束通话， 并释放为电话终端分配的网络资源。
20、 根据权利要求 18所述的实现数字集群***与普通电话***互联互通 的***， 其特征在于：
集群终端、 基站并不需要和普通电话***发生直接的信令和语音的交互， 无需关心呼叫中是否有普通电话终端参与；
调度服务器负责维护集群终端和普通电话终端参与的集群呼叫，和集群信 令网关进行信令交互完成对普通电话的集群呼叫控制，和集群媒体网关进行媒 体交互完成与普通电话相关的语音转发工作；
集群归属寄存器负责维护集群终端和普通电话终端的终端类型、用户信息 以及群组信息， 对集群终端和普通电话终端进行集群呼叫的鉴权和计费； 集群信令网关主要承担集群***和普通电话***间的信令翻译工作，和软 交换模块进行信令交互完成集群呼叫的接续控制， 控制集群媒体网关的资源， 维护和调度服务器之间的通信链路；
集群媒体网关主要承担分发语音媒体流，维护和调度服务器之间的语音链 路，承担语音媒体流在数字集群***和普通电话***间的格式转换，播放提示 音等工作；
软交换模块负责维护普通电话终端的呼叫，和集群信令网关进行信令交互 完成集群呼叫的接续控制， 控制下一代网络媒体网关的资源；
下一代网络媒体网关主要承担接受软交换模块的控制， 转发语音媒体流； 电话终端可作为集群呼叫的终端参与集群呼叫，即可以作为主叫发起集群 呼叫， 也可以作为被叫被动地参与集群呼叫。
21、 根据权利要求 18所述的实现数字集群***与普通电话***互联互通 的***， 其特征在于， 电话终端作为主叫发起集群呼叫时，
电话终端拨集群呼叫的号码， 发起集群呼叫；
软交换模块根据呼叫的群组号码分析出呼叫的归属地后， 向数字集群*** 的集群网关发送邀请发起呼叫的信令， 被邀请的对象是呼叫号码；
集群网关向调度服务器转发发起呼叫的请求；
调度服务器根据呼叫号码向集群归属寄存器鉴权， 如果鉴权不通过， 调度 服务器将向集群网关发送拒绝呼叫建立消, 集群网关向软交换模块发送拒绝 消息； 软交换模块向电话终端发送建立呼叫失败消息；
鉴权通过，调度服务器按照正常的集群呼叫流程寻呼各个集群终端， 寻呼 完毕后通知集群网关接受电话终端发起的呼叫请求；
集群网关为电话终端建立本次呼叫分配媒体流资源；
集群网关通知软交换模块接受电话终端的呼叫申请； 下一代网络为发起呼叫的电话终端分配网络资源并建立连接。
22、 根据权利要求 18所述的实现数字集群***与普通电话***互联互通 的***， 其特征在于， 电话终端作为被叫加入集群呼叫时，
集群终端或者电话终端发起建立集群呼叫；
数字集群***呼叫本次呼叫包含的所有被叫终端；
如果调度服务器发现本次集群呼叫的被叫包括电话终端，调度服务器则向 集群网关发送呼叫电话终端消息；
集群网关根据电话终端的号码分析出其归属地的软交换模块并向该软交 换模块发送呼叫邀请；
软交换模块呼叫电话终端；
电话终端摘机；
软交换模块为电话终端分配网络资源， 并向集群网关发送接受邀请消息； 集群网关通知调度服务器呼叫电话终端完毕， 电话终端加入到集群呼叫 中。
23、 根据权利要求 18所述的实现数字集群***与普通电话***互联互通 的***， 其特征在于， 所述电话终端申请说话权时，
电话终端启动***约定的申请说话权按键申请说话权；
申请说话权的按键信息通过下一代网络媒体网关转发给集群网关； 集群网关向调度服务器发送电话终端申请说话权的请求；
调度服务器根据优先级原则决定是否将说话权授予该电话终端，如果该电 话终端可以获得说话权， 调度服务器则向集群网关发送授予说话权消息， 否则 调度服务器向集群网关发送拒绝授予说话权消息；
集群网关经过下一代网络媒体网关的中转通过语音提示的方式告诉电话 终端本次申请说话权是否成功。
24、 根据权利要求 18所述的实现数字集群***与普通电话***互联互通 的***， 其特征在于， 电话终端释放说话权时，
电话终端按下***释放说话权按键启动释放说话权过程；
释放说话权的按键信息通过下一代网络媒体网关转发给集群网关； 集群网关向调度服务器发送电话终端释放说话权的请求；
调度服务器收回说话权。 25、 根据权利要求 19所述的实现数字集群***与普通电话***互联互通 的***， 其特征在于， 所述电话终端主动退出集群呼叫时，
电话终端直接挂断电话；
软交换模块在电话终端挂断后向集群网关发送挂断消息；
集群网关通知集群调度服务器电话终端已退出呼叫；
调度服务器将根据此指示把电话终端从呼叫成员中删除。
26、 根据权利要求 19所述的实现数字集群***与普通电话***互联互通 的***， 其特征在于， 所述数字集群***强制电话终端退出集群呼叫时， 调度服务器通知集群网关， 让指定电话终端退出集群呼叫；
集群网关通知软交换模块释放指定的电话终端；
软交换模块通知电话终端呼叫结束；
软交换模块释放先前为该电话终端分配的网络资源；
软交换模块应答集群网关， 释放电话终端完毕；
集群网关释放先前为该电话终端分配的网络资源；
集群网关应答调度服务器， 电话终端已经退出集群呼叫。
27、 根据权利要求 18所述的实现数字集群***与普通电话***互联互通 的***， 其特征在于， 集群网关和下一代网络连接时， 采用 H.323协议或 SIP 协议实现信令交互， 釆用 RTP RTCP协议传输语音媒体流；集群信令网关采用 Megaco协议或 MGCP协议控制集群媒体网关。
28,根据权利要求 18到 27其中任意一项所述的实现数字集群***与普通 电话***互联互通的***， 其特征在于， 如果用户发起的是集群组呼， 那么用 户拨的号码是集群群组号码， 该群组号码对应于两个或者两个以上的集群用 户， 调度服务器将把多个用户加入到本次呼叫中； 如果发起的是集群私密呼 口 L1 , 那么用户拨的号码是被叫用户的集群号码， 仅对应于一个集群用户。
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