CN100544464C - A kind of method and system of realizing the IMS business intercommunication - Google Patents

A kind of method and system of realizing the IMS business intercommunication Download PDF

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Publication number
CN100544464C
CN100544464C CNB2007100888361A CN200710088836A CN100544464C CN 100544464 C CN100544464 C CN 100544464C CN B2007100888361 A CNB2007100888361 A CN B2007100888361A CN 200710088836 A CN200710088836 A CN 200710088836A CN 100544464 C CN100544464 C CN 100544464C
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poc
business
service
scim
request
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CN101052161A (en
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谢国军
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Abstract

The invention discloses a kind of method and system of the IMS of realization business intercommunication, whether can convert the business that the purpose terminal is supported to by the business that makes professional ability interaction management device SCIM detect the current sessions request by the business intercommunication application server, if then the current sessions request is transmitted to the business intercommunication application server; After the business intercommunication application server receives the current sessions request of SCIM transmission, convert the business of current sessions request to business that the purpose terminal is supported, send to the technical scheme of purpose terminal, make and do not support the terminal of current business can receive current business, thereby better user experience can be provided.The embodiment of the invention also discloses a kind of method and system of realizing the VCC switching of PoC service, when the scope that makes the user cover from the PS territory moves to the scope of CS territory covering, the PoC service that can continue to have set up.

Description

A kind of method and system of realizing the IMS business intercommunication
Technical field
The present invention relates to the IMS networking technology area, refer to a kind of method and system of the IMS of realization business intercommunication, a kind of SCIM, a kind of method and system and a kind of wireless terminal of realizing the VCC switching of PoC service especially.
Background technology
IP Multimedia System (IMS, IP Multimedia Subsystem) be one IP-based, professional open, with the irrelevant network environment of access way.IMS is by providing user ID authentication, service quality (QoS at the core network layer, Quality of Service) assurance, safety assurance, network address translation (NAT, Network Address Transmit) function such as ride-through capability can support miscellaneous service.Therefore, IMS is that industry is generally acknowledged the unified platform that can realize the network integration and integrated services, is the core net framework of next generation network, also is the key components in the 3G system.
Fig. 1 is in the prior art, the system configuration schematic diagram of IMS.As shown in Figure 1, conversation control function entity (CSCF, Call Session Control Function) and home subscriber server (HSS, Home Subscriber Server) are entire I MS server (IMS Core).HSS is a uniform data memory relevant with service with the user among the IMS, CSCF supports session initiation protocol (SIP, Session Initiation Protocol) and treatment S IP session, comprise proxy CSCF (P-CSCF), intercommunication CSCF (I-CSCF) and serving CSCF (S-CSCF).
S-CSCF obtains various services and application as the session control main body by IP multimedia service control (ISC) interface and application server communication.Application server comprises: sip application server (SIP AS, SIP Application Server), IP multimedia service function of exchange entity (IM-SSF) and open visit service enable service capability server (OSA-SCS).
SIP AS comprises: professional ability interaction management device (SCIM, Service CapabilityInteraction Manager) and other application servers (AS, Application Server).Interactive maintenance function between SCIM realization business is responsible for providing and carrying out business, influences the SIP session by sip application server and handles.AS can visit other AS, and when other AS were positioned at outside the home network, AS can be used as the gateway of other AS.
IM-SSF is mainly used in the SCP that is linked in the traditional intelligence net, is a kind of application server of particular type.
OSA-SCS is based on the OSA/Parlay framework, and the ability that is linked into the OSA application server is provided.
Multimedia resource function controller (MRFC) (MRFC) is supported the service relevant with carrying.
At present, existing mediaphone, PTT (PoC, Push-to-talk Over Cellular), meeting, recreation, continuous voice call (VCC, Voice Call Continuity) business, click to dial etc. are professional based on the IMS network operation.And, put into effect having more business based on IMS along with the positive deployment of IMS.
The VCC business is meant that when the user entered the scope of circuit switching (CS, Circuit Switch) the territory network coverage from the scope in packet switching (PS, Packet Switch) the territory network coverage, the IMS audio call of setting up in the PS territory switched to the CS territory and proceeds; Or when the user when the scope of the CS territory network coverage enters the scope of the PS territory network coverage, the IMS audio call of setting up in the CS territory switches to the PS territory and proceeds.The VCC switching is generally initiated according to detected network signal state by subscriber terminal equipment UE, by call continuity controlled function entity (CCCF, Call Continuity Control Function) each road branch in association and the administer calls, select entity (NeDS by network domains, Network DomainSelection) be responsible for when call setup, decision is by which kind of approach contact user.CCCF/NeDS is a kind of SIP AS of IMS.
IMS provides professional form, generally is to introduce an AS, and each AS can resident one or more business.May differ greatly between each professional flow process, purposes is different, and therefore a lot of service needed are upward introduced clients corresponding software and AS at subscriber terminal equipment (UE, User Equipment) and provided concrete business to the user together.As PoC service, just need dispose PoC service server (PoC Sever) at network side, need dispose PoC client-side program (PoC Client) in the UE side.Various UE support for the part basic service, as mediaphone, short message; And for other numerous business, it is very big that the support of different UE then may difference.Do not support certain business for UE, be called UE and " lack certain professional ability ".
When network is routed to the terminal of " lacking this professional ability " with the session of related service, terminal may not refused to call out because of there being suitable client process session, also may enable common mediaphone client and bring in the processing session, the latter may be incompatible because of the signaling process and the telephone service of business, and cause the failure of session.When PoC session being routed on the plain old telephone terminal, telephone terminal be because of can't understanding the specific information of PoC session, and causes conversation failure.
In the prior art, terminal can the handling capacity indicating means, to its business support ability of network-reporting.And the user terminal of initiation session can be specified the Capability Requirement of the terminal that receives session, this requirement is called " Caller Preference ", two header field Accept-Contact/Reject-Contact by expansion pass on this requirement, after the SIP network receives the request of this session, can be by the requirement of service conversation, each terminal capability to the purpose user is done matching check, is routed to suitable terminal with the session with business.
The implicit expression Preference rule of route conversation that also has a kind of SIP Proxy of network in the prior art: when the initial request in session was not stated " Caller Preference ", the Proxy session of should trying one's best was to the terminal that possesses this session ability.
But implicit expression Preference rule remains a kind of optional action, and this inspection may not supported or not carry out to network, so professional session still may be routed on the terminal that does not possess this professional ability, causes the failure of calling out.
In sum, the capabilities match detection to the business purpose terminal in the prior art is a kind of optional action, even after the executive capability matching detection, when not having the purpose terminal of capabilities match, also will return failure response.
Summary of the invention
In view of this, embodiments of the invention provide a kind of method of the IMS of realization business intercommunication, and this method makes the terminal do not support current business can receive the current business after the conversion, thereby better user experience can be provided.
The embodiment of the invention provides a kind of system of the IMS of realization business intercommunication, and this system makes the terminal do not support current business can receive the current business after the conversion, thereby better user experience can be provided.
The embodiment of the invention provides a kind of SCIM, and whether this SCIM can detect two kinds of different business can realize intercommunication.
The embodiment of the invention provides a kind of method that realizes the VCC switching of PoC service, when the scope that this method makes the user cover from the PS territory moves to the scope of CS territory covering, and the PoC service that can continue to have set up.
The embodiment of the invention also provides a kind of system that realizes the VCC switching of PoC service, when the scope that this system makes the user cover from the PS territory moves to the scope of CS territory covering, and the PoC service that can continue to have set up.
The embodiment of the invention provides a kind of wireless terminal, and this terminal can support the VCC of PoC service to switch.
For achieving the above object, technical scheme of the present invention specifically is achieved in that
The embodiment of the invention discloses a kind of method of the IMS of realization business intercommunication, this method comprises:
A, when the purpose terminal is not supported the type of service of current sessions request, whether the business that professional ability interaction management device SCIM detects the current sessions request can convert the business that the purpose terminal is supported to by the intercommunication application server of current business and purpose terminal institute supporting business, if, then the current sessions request is transmitted to the intercommunication application server of described current business and purpose terminal institute supporting business, execution in step B; Otherwise the initiator returns failure response to the current sessions request, process ends;
After the intercommunication application server of B, described current business and purpose terminal institute supporting business receives the current sessions request that SCIM sends, convert the business of current sessions request to business that the purpose terminal is supported, send to the purpose terminal.
The embodiment of the invention discloses a kind of system of the IMS of realization business intercommunication, this system comprises:
SCIM, be used for when the purpose terminal is not supported the type of service of current sessions request, whether the business that detects the current sessions request can convert the business that the purpose terminal is supported to by the intercommunication application server of current business and purpose terminal institute supporting business, if then the current sessions request is transmitted to the intercommunication application server of described current business and purpose terminal institute supporting business; Otherwise the initiator returns failure response to the current sessions request;
The intercommunication application server of current business and purpose terminal institute supporting business is used for after receiving the current sessions request that SCIM sends, and converts the business of current sessions request to business that the purpose terminal is supported, sends to the purpose terminal.
The embodiment of the invention also discloses a kind of professional ability interaction management device SCIM, this SCIM comprises the business intercommunication detection module, be used to detect two kinds of different business and can carry out the intercommunication conversion by the business intercommunication application server, when the purpose terminal is not supported the type of service of current sessions request, whether the business that detects the current sessions request can convert the business that the purpose terminal is supported to by the intercommunication application server of current business and purpose terminal institute supporting business, if then the current sessions request is transmitted to the intercommunication application server of described current business and purpose terminal institute supporting business; Otherwise the initiator returns failure response to the current sessions request.
The embodiment of the invention discloses a kind of method that realizes the VCC switching of PoC service, this method comprises:
Set up in the process at PoC service, SCIM is transmitted to CCCF with the PoC service request that the PoC server sends, and CCCF finishes the PoC server and is connected with PoC service between the PoC terminal;
When PoC service when the PS territory switches to the CS territory, the PoC terminal sends the telephone service request to SCIM; It is that PoC service carries out the PS territory when switching to the VCC in CS territory that SCIM detects, detect PoC service and whether can convert telephone service to by the intercommunication application server of PoC service and telephone service, if then described telephone service request is sent to the intercommunication application server of PoC service and telephone service; The intercommunication application server of PoC service and telephone service sends the PoC service request to CCCF after PoC service and telephone service are carried out the intercommunication conversion process; After CCCF receives described PoC service request, finish the VCC of PoC service and switch from the PS territory to the CS territory.
The embodiment of the invention also discloses a kind of system that realizes the VCC switching of PoC service, it is characterized in that this system comprises:
SCIM is used for setting up process in business the PoC service request that the PoC server sends is transmitted to CCCF; At PoC service when the PS territory switches to the CS territory, receive the telephone service request that the PoC terminal sends, detect PoC service and whether can convert telephone service to by the intercommunication application server of PoC service and telephone service, if then the telephone service request that described PoC terminal is sent is transmitted to the intercommunication application server of PoC service and telephone service;
CCCF is used for setting up process in business, receives the PoC service request that SCIM sends, and finishes the PoC server and be connected with PoC service between the PoC terminal; At PoC service when the PS territory switches to the CS territory, receive the PoC service request that the intercommunication application server of PoC service and telephone service sends after, finish the VCC of PoC service and switch from the PS territory to the CS territory;
The intercommunication application server of PoC service and telephone service is used at PoC service receiving the telephone service request that SCIM sends when the PS territory switches to the CS territory, and after PoC service and telephone service carried out the intercommunication conversion process, sends the PoC service request to CCCF;
The PoC terminal is used at PoC service sending the telephone service request to SCIM when the PS territory switches to the CS territory.
As seen from the above technical solution, the embodiment of the invention, whether can convert the business that the purpose terminal is supported to by the business that makes SCIM detect the current sessions request, if then the current sessions request is transmitted to the business intercommunication application server by the business intercommunication application server; After the business intercommunication application server receives the current sessions request of SCIM transmission, convert the business of current sessions request to business that the purpose terminal is supported, send to the technical scheme of purpose terminal, make and do not support the terminal of current business can receive current business, thereby better user experience can be provided.The embodiment of the invention is also switched by the VCC that realizes PoC service, when the scope that makes the user cover from the PS territory moves to the scope of CS territory covering, and the PoC service that can continue to have set up.
Description of drawings
Fig. 1 is in the prior art, the system configuration schematic diagram of IMS;
Fig. 2 is in the prior art, the flow chart that the third-party registration of IMS and registered events are subscribed to;
Fig. 3 is the embodiment of the invention, the flow chart of IMS SCIM service intercommunication conversion method;
Fig. 4 is the embodiment of the invention, the internal logic process chart of SCIM;
Fig. 5 is the embodiment of the invention, PoC service and common SIP Phone business intercommunication transformation flow figure;
Fig. 6 is the embodiment of the invention, the intercommunication conversion of PoC service and telephone service and the professional flow chart that combines of VCC;
Fig. 7 is the embodiment of the invention, the business intercommunication transformation flow figure when S-CSCF carries out " Caller Preference " detection;
Fig. 8 is the embodiment of the invention, a kind of structured flowchart of realizing the system of IMS business intercommunication;
Fig. 9 is the embodiment of the invention, the structured flowchart of SCIM among Fig. 8;
Figure 10 is the embodiment of the invention, the structured flowchart of the system that a kind of VCC that realizes PoC service switches;
Figure 11 is the structured flowchart of the PoC terminal among Figure 10.
Embodiment
In the embodiment of the invention: the SCIM of IMS network is when carrying out professional interactive maintenance, whether the professional ability that detects current registered each contact address of purpose terminal of session is complementary with current business, when not matching, judge whether current business can continue service by business intercommunication AS with the purpose terminal, if can, then route conversation is to business intercommunication AS; Business intercommunication AS proceeds it by current business being converted to the business that the purpose terminal is supported on the purpose terminal.
Though this be because partial service can't with the direct communication of terminal of not having these professional abilities, but still may be by middle business intercommunication AS, it is professional to utilize basic business ability on this Terminal Type to continue, as:
1. instant message (IM, Instant Message) just can be by converting short message (SM, Short Message) to and not having the common mobile terminal communication of IM professional ability.
2.PoC by conversion, can allow the plain old telephone terminal use, participate in the PoC session.Some specific characteristics of PoC service, as rob right of speech, right of speech state notifying etc. can pass through dual-tone multifrequency (DTMF, Dual Tone Multi Frequency) and collect the digits, change AS and put prompt tone and solve.This conversion can be expanded customer group and the access scope of PoC, also can and the professional combination of VCC (Voice Call Continuity), better user experience is provided.
The SCIM of IMS network is in order to obtain the professional ability of user terminal, a kind of reasonable method is that user terminal indication IMS network when registration is that user terminal triggers the third-party SCIM of being registered to, and SCIM obtains the ability of the correlative connection address of indicating in user's registration message again by booking reader's registered events.The subscription of third-party registration and registered events is a kind of normal process of IMS.
Fig. 2 is in the prior art, the flow chart that the third-party registration of IMS and registered events are subscribed to.As shown in Figure 2, may further comprise the steps:
Step 201, user terminal UE sends " REGISTER " SIP request to IMS Core, in order to initiate registration to the IMS network.UE indicates its professional ability by the contact parameter of registration message to the IMS network, for example, supports plain old telephone service " Service2 ".
Step 202, " REGISTER " SIP request is routed to the S-CSCF among the IMS Core, and S-CSCF carries out initial filter criteria (iFC, initial Filter Codex) and detects, and decision is initiated the third-party registration process to SCIM.
Step 203, the S-CSCF among the IMS Core substitutes " contact " header field content in the SIP request " REGISTER " for behind the address of S-CSCF, sends to SCIM.
Step 204, SCIM returns " 200 OK " response to IMS Core, to confirm successfully to receive and handle " REGISTER " SIP request.
Step 205 after IMS Core handles " REGISTER " SIP request, is returned " 200OK " response to UE, to confirm successfully to receive and handle " REGISTER " SIP request.
Step 206, SCIM is in order to obtain the professional ability indication information of UE registration, and the S-CSCF that indicates to the contact header field of " REGISTER " SIP request sends " SUB SCRIBE " SIP request, subscribes to the registered events of UE with the S-CSCF in IMSCore.
Step 207 after S-CSCF successfully handles " SUBSCRIBE " SIP request, is returned " 200OK " response to SCIM, to confirm successfully to receive and handle " SUBSCRIBE " SIP request.
Step 208, as one of result who subscribes to, S-CSCF sends " NOTIFY " sip message to SCIM.The log-on message of UE comprises " contact " header field content in the register requirement that UE sends, and all is encapsulated among the BODY of " NOTIFY " message.
Step 209, the professional ability of indication when SCIM obtains the UE registration from the BODY of " NOTIFY " message, and storage.
Step 210, SCIM returns " 200 OK " response to S-CSCF, to confirm successfully to receive and handle " NOTIFY " SIP request.
More than be the IMS third-party registration and the registered events subscription procedure of standard.
SCIM can also adopt the mode of the local configuration of SCIM, the professional ability of each user terminal of mark except that obtaining by third-party registration the professional ability of user terminal.
Fig. 3 is the embodiment of the invention, the flow chart of IMS SCIM service intercommunication conversion method.As shown in Figure 3, may further comprise the steps:
Step 301, type of service are the conference call user terminal UE B of " Service1 ", go into to exhale when taking place, and the SIP of Service1 " INVITE (Service1) " request is routed to the IMS Core (MT) of UE B by the professional IMS Core (MO) that initiates side.Here UE B is in callee side, so its network is called as IMS termination side network (MT, Mobile Terminated), and the termination side also claims callee side; The network of Calling Side is called IMS and initiates side network (MO, Mobile Original).
Step 302, the network based user's of IMS of UE B iFC is forwarded to SCIM with the SIP of " INVITE (Service1) " request.
Step 303, SCIM presses the RFC3841 definition, according to the Caller Preference of conversation request " INVITE (Service1) " indication, or the implicit expression Preference rule of session, the professional ability of inspection UE B.When UE B did not support that " Service 1 " is professional, it fails to match, execution in step 304.
Step 304, whether SCIM judges between the business " Service2 " that current business " Service1 " and UE B support can carry out the intercommunication conversion by business intercommunication AS, when can the time execution in step 305, otherwise return failure response " 405Method Not Allowed ".
Step 305, SCIM transmits Service1 service request " INVITE (Scrvicc1) " to business intercommunication AS.
Step 306, business intercommunication AS carries out the intercommunication conversion to " Service1 " is professional with " Service 2 " business.
Step 307, business intercommunication AS sends the conversation request " INVITE (Service 2) " of " Service 2 " form to UE B." INVITE (Service 2) " finally are sent to UE B through the routing forwarding of SCIM and ISM Core (MT).
In flow process shown in Figure 3, SCIM need carry out a series of logic determines.Fig. 4 is the embodiment of the invention, the internal logic process chart of SCIM.As shown in Figure 4, may further comprise the steps:
Step 401, SCIM receives " INVITE " conversation request from S-CSCF.
Step 402, SCIM carries out " Caller Preference " and detects, and promptly checks in the conversation request requirement to session receiving terminal professional ability.
Step 403, SCIM judges whether to exist with " Caller Preference " professional ability and requires the terminal that is complementary, is execution in step 404 then; Otherwise execution in step 405.
Step 404, SCIM is transmitted to " INVITE " conversation request the terminal of coupling.
Step 405, SCIM judges whether the professional business of supporting with terminal of current sessions can do the intercommunication conversion, is execution in step 406 then; Otherwise execution in step 407.
Step 406, SCIM is transmitted to business intercommunication AS with " INVITE " conversation request.
Step 407, SCIM returns failure response " 405Method Not Allowed ".
" Caller Preference " detects and carried out by SCIM in the internal logic handling process of the SCIM that the front is shown in Figure 4, " Caller Preference " detects and also can carry out at S-CSCF, but the terminal time spent that does not have coupling when session, S-CSCF returns 405 failure responses to SCIM, after SCIM detects this failure response, the intercommunication conversion logic of being engaged in judges, in the time can carrying out the business intercommunication conversion, with route requests to business intercommunication AS.
Fig. 5 is the embodiment of the invention, the business intercommunication transformation flow figure when S-CSCF carries out " Caller Preference " detection.As shown in Figure 5, may further comprise the steps:
Step 501, user terminal UE B sends " REGISTER " SIP request to IMS Core, in order to initiate registration to the IMS network.
Step 502, IMS Core obtains the professional ability of UE B from " REGISTER " request, and storage.
Step 503 after IMS Core handles " REGISTER " SIP request, is returned " 200OK " response to UE B, to confirm successfully to receive and handle " REGISTER " SIP request.
Step 504, the conference call user terminal UE B of " Servicel " goes into to exhale when taking place, and the IMS Core (MT) that the IMS Core (MO) that initiates side is routed to UE B is called out in the SIP of Service1 " INVITE (Service 1) " request.
Step 505, IMS Core (MT) is according to user's iFC, and the SIP request of " INVITE (Service 1) " is forwarded to SCIM.
Step 506, SCIM is routed to " INVITE (Service1) " S-CSCF of IMS Core (MT) again.
Step 507, the S-CSCF of IMS Core (MT) carries out " Caller Preference " and detects.
Step 508, after the S-CSCF of IMS Core (MT) carries out " Caller Preference " detection, when discovery UE B business of being supported " Service2 " and the business " Service 1 " that " Caller Preference " requires are not returned failure response " 405Method Not Allowed " to SCIM when matching.
Step 509, SCIM judges whether the business " Service 2 " that current sessions business " Service 1 " and terminal are supported can do the detection that intercommunication is changed.
Step 510 when SCIM detects " Service 1 " and " Service 2 " and can carry out the intercommunication conversion by business intercommunication AS1, is transmitted " INVITE (Service 1) " request to business intercommunication AS1.
Step 511, business intercommunication AS sends " INVITE (Service 2) " request to UE B after the intercommunication conversion is carried out in " Service 1 " and " Service 2 ", and this asks finally to arrive UE B by SCIM and ISM Core (MT) route.
In the described flow process of above-mentioned Fig. 5, carry out " Caller Preference " by S-CSCF and detect, so S-CSCF need not to initiate third-party registration to SCIM.
For making purpose of the present invention, technical scheme and advantage clearer, below following PoC service and common SIP Phone business be that telephone service is embodiment, the present invention is described in more detail.
PoC service is the different business of two classes with telephone service.PoC service is a kind of semiduplex cluster communication business, because its service needed user obtains right of speech earlier and make a speech, so the communication that the support of the specific terminal software of this service needed could enter PoC smoothly.The terminal of nearly all IMS is the supporting telephone business all, comprises the telephone service of IMS telephone service and circuit domain, and IMS developed the VCC business for this reason, continues service so that the telephone service of IMS switches to circuit domain, described in Fig. 2.
The user of the PoC service of having contracted may use supporting telephone professional and do not have the IMS terminal of PoC ability in a period of time, even only use a plain old telephone terminal of having only CS territory telephone capability.In this case, the session that PoC service sends to this user will cause conversation failure because of the incompatible of operation flow.
In this scene, change, will make the user obtain extraordinary experience if realize the business intercommunication between PoC service and common SIP Phone business.Fig. 6 is the embodiment of the invention, PoC service and common SIPPhone business intercommunication transformation flow figure.As shown in Figure 6, may further comprise the steps:
Step 601, PoC service server (PoC Server) sends " INVITE " request to the terminal SIP of called subscriber A PhoneA, enters the PoC cluster communication to call out member A.PoC Server sends " INVITE " request to the IMS Core (MT) at SIP Phone A place earlier for this reason, to invite the user to enter PoC session, attached Session Description Protocol (SDP) information of PoC Server one side among the message body BODY of " INVITE " request, represented with PoC SDP1.This request is routed to SCIM by IMS Core (MT).
Step 602, SCIM carries out " professional compatible the detection and the business intercommunication transition detection " shown in Figure 4 and finds that user A current active terminal SIP Phone A does not have the PoC function, only support plain old telephone service, but two kinds of business can be changed by the intercommunication application server " PoC-Phone intercommunication AS " of PoC service and telephone service.
Step 603, SCIM is transmitted to PoC-Phone intercommunication AS with " INVITE " request.
Step 604, after PoC-Phone intercommunication AS receives " INVITE " request of SCIM transmission, the termination PoC session, as a SIP (SIP B2BUA) role back-to-back, send " INVITE " SIP request of normal voice calls phone flow process to SIP Phone A, SDP information among the BODY of this SIP request is to carry out the media description information of telephone service one side that business intercommunication prepares for PoC-Phone intercommunication AS, represents with Phone SDP2.Be somebody's turn to do the routing forwarding of " INVITE " request, finally arrive SIP Phone A by SCIM and IMS Core (MT).
Step 605, SIP Phone A begins ring, and SIP Phone A returns " 180RING " SIP Temporary Response message to the IMS network, the state that receives " INVITE " request message and begin ring with indication." 180RING " SIP Temporary Response message is arrived PoC-Phone intercommunication AS by the path of message process by IMS Core (MT) and SCIM routing forwarding.
Step 606, PoC-Phone intercommunication AS returns " 180RING " SIP Temporary Response message to PoC service session one side, receives " INVITE " message with indication, reaches the state that terminal SIP Phone A begins ring." 180 RING " SIP Temporary Response message is arrived PoC Server by the path of message process by SCIM and IMSCore (MT) routing forwarding.
Step 607, called subscriber A receives calls, and SIP Phone A returns the final response message of " 200 OK " SIP to the IMS network, accepts the state of this calling with indication user A.Among the BODY of " 200 OK " response message, can indicate the media description SDP information of SIP Phone A one side, represent with Phone SDP3." 200 OK " response message is arrived PoC-Phone intercommunication AS by the path of message process by IMS Core (MT) and SCIM routing forwarding.
Step 608, PoC-Phorne intercommunication AS returns " ACK " message at telephone service session one side direction SIP Phone A, to acknowledge receipt of " 200 OK " response message." ACK " message is routed to SIP Phone A by SCIM and IMS Core (MT).
Step 609, PoC-Phone intercommunication AS begins to return the final response message of " 200 OK " SIP to PoC service one side of session, accept the state of this calling with the indication user, among the BODY of " 200 OK " response message, can indicate the media description SDP information of PoC-Phone intercommunication AS, represent with PoC SDP4 for PoC service one side carrying out business intercommunication and prepare." 200 OK " response message is by the path of message process, and SCIM and IMS Core (MT) routing forwarding are to PoC Server.
Step 610, PoC Server returns " ACK " message to PoC-Phone intercommunication AS, to acknowledge receipt of " 200 OK " response message after receiving " 200 OK " response." ACK " is routed to PoC-Phone intercommunication AS by IMS Core (MT) and SCIM.
Step 611, when user member made a speech, PoC Server indicated right to speak to be had by certain member to right of speech control protocol (TBCP, the Talk Burst Control Protocol) message that all the other each members send " TalkBurst Taken ".The TBCP agreement is a kind of agreement that PoC adopted, was used to control right to speak.Because user A is for PoC Server, represent by PoC-Phone intercommunication AS, therefore " IalkBurst Taken " message is sent to PoC-Phone intercommunication AS, PoC-Phone intercommunication AS is converted to prompt tone with corresponding right of speech status message " Talk Burst Taken ", plays to user A by SIP Phone A.
Step 612, PoC Server sends the user's voice Media Stream of making a speech to PoC-Phone intercommunication AS, and PoC-Phone intercommunication AS will be transmitted to SIP Phone A from the audio medium stream that PoC Server receives.But PoC-Phone intercommunication this moment AS does not transmit voice that SIP Phone A sends to PoC Server, this is to be engaged in because PoC service is a kind of single industry, be that synchronization can only have member's speech, all the other members can only accept, their Media Stream does not allow to issue PoC Server, and the telephone service that SIP Phone A supports is duplexing, is sending out in the time of receipts yet, need stop by PoC-Phone intercommunication AS, forbid sending to PoC Server.
Step 613, the speech member finishes speech, and when discharging right to speak, PoC Server indicates the speech district idle to the TBCP message that all the other each members send " Talk Burst Idle "." Talk Burst Idle " is sent to PoC-Phone intercommunication AS, and intercommunication AS is converted to prompt tone with corresponding right of speech status message " Talk Burst Idle ", plays to user A by SIP Phone A.
Step 614 when user A wishes to obtain the speech district, by pressing the assignment key on the SIP Phone A, is initiated the right to apply for words.SIP Phone A sends dual-tone multifrequency (DTMF, Dual Tone Multi Frequency) message to PoC-Phone intercommunication AS.PoC-Phone intercommunication AS receives DTMF message, to SIP Phone A collect the digits handle after, be converted to PoC right of speech status message " Talk Burst Request " and issue PoC Server.
Step 615, the right to apply for words request of PoC Server approval user A is returned " Talk Burst Granted " message to PoC-Phone intercommunication AS, gets permission to indicate its application.PoC-Phone intercommunication AS plays relevant prompt tone by SIP Phone A and gives user A.
Step 616, user A begins speech after hearing prompt tone, and PoC-Phone intercommunication AS receives from the audio medium stream of SIPPhone A and is forwarded to PoC Server.PoC Server is transmitted to other members again.
Step 617 after user A speech finishes, by pressing the assignment key on the SIP Phone A, discharges right of speech.Send DTMF message to PoC-Phone intercommunication AS, PoC-Phone intercommunication AS receives DTMF message, to SIP Phone A collect the digits handle after, be converted to PoC right of speech status message " Talk BurstRelease " and issue PoC Server, and the voice medium that stops forwarding from SIP Phone A flows to PoCServer.
Step 618, PoC Server indicates the speech district idle to the TBCP message that all the other each members send " Talk Burst Idle ".
Finish PoC service and common SIP Phone business intercommunication transformation flow by above-mentioned steps, the user can use common SIP Phone terminal to carry out PoC service.
When the PoC telephone service was transferred to common PSTN terminal by calling, its transfer process was also identical with process among Fig. 6, here no longer narration.Therefore as seen, by the service intercommunication conversion, can expand the scope and the access way of the business of PoC.
User's PoC terminal may have been walked out the coverage in PS territory in handoff procedure, the coverage that enters the CS territory, and PoC service will interrupt because of IP wraps the PoC terminal that can't arrive the user this moment.The VCC business has then realized the switching of speech business in PS territory and CS territory, possesses user experience preferably.Therefore,, and allow the PoC terminal support VCC to switch, the intercommunication conversion of PoC service and telephone service is combined with VCC, also can expand professional deployment scope, better service is provided if positive plain old telephone service is changed in the PoC service intercommunication.
Fig. 7 is the embodiment of the invention, the intercommunication conversion of PoC service and telephone service and the professional flow chart that combines of VCC.As shown in Figure 7, may further comprise the steps:
Step 701, PoC Server sends " INVITE " request to the PoC of called subscriber A client (PoC Client A), enters the PoC cluster communication to call out member A.The BODY of " INVITE request " request has attached the SDP information of PoC Server one side, represents with PoC SDP1.The IMS Core of " INVITE " message process is routed to the SCIM at called PoC Client A place, SCIM judges that the current sessions business of user A is a PoC service, and PoC Client A need support the VCC of PoC to switch, Gu transmit the CCCF/NeDS that " INVITE " asks VCC.
Step 702, CCCF/NeDS is as SIP B2BUA role, the termination PoC Server session of sending earlier, and make a call to called subscriber A by the PS territory.
Step 703, CCCF/NeDS is the related cells information of " INVITE " message of PoC Server, as information reproductions such as from, to header field, SDP, content-type, accept-contact in " NVITE " message of sending to the user, be somebody's turn to do " INVITE " message through SCIM, IMS Core, finally be routed to PoC Client A.
Step 704, user A accepts session, and PoC Client A returns " 200 OK " response, and the media description SDP information of having attached PoC Client A among the BODY of " 200 OK " response message is represented with PoC SDP2." 200 OK " response message is routed to CCCF/NeDS through IMS Core, SCIM.
Step 705, CCCF/NeDS returns " ACK " message to PoC Client A, to confirm to receive " 200 OK ".
Step 706, CCCF/NeDS sends " 200 OK " response to PoC Server side, receives " INVITE " message with indication, and user A accepts the state of PoC session.CCCF/NeDS is the related cells information of " 200 OK " response message of user side, and in " 200 OK " response of sending to PoC Server side, " 200 OK " is routed to PoC Server through SCIM, IMS Core as information reproductions such as SDP.
Step 707, PoC Server returns " ACK " message to CCCF/NeDS, to confirm to receive " 200 OK " response.
Step 708, when user member made a speech, PoC Server indicated right to speak to be had by certain member to the TBCP message that all the other each members send " Talk BurstTaken ", PoC Server comprises that to each member user A transmits speech user's voice Media Stream afterwards.
Step 709, PoC Client A is according to wireless conditions, and decision switches to the CS territory.
Step 710, VCC switching management module on the PoC Client A is called CS territory phone software and is made a call, the destination Mobile Station International ISDN Number of calling out is a special number, and CS territory network is routed to the MGCF of IMS with the calling of this number, i.e. this calling enters the IMS network by MGCF.MGCF sends " INVITE " request to IMS Core.The Req-URI of " INVITE " request partly is the PSI of VCC, and promptly above-mentioned special telephone number, BODY partly for the media description SDP information of MGCF for this telephone service distribution, are represented with SDP3.IMS Core should " INVITE " request be routed to SCIM.
Step 711, it is a PoC session that SCIM detects by the branch of VCC switch call, need call the intercommunication conversion that PoC-Phone intercommunication AS carries out PoC service and telephone service.
In this step, the same CCCF of method of SCIM retrieval VCC switch call branch, but in addition SCIM also will obtain the type of service of the calling branch that is switched.
Step 712, SCIM arrives PoC-Phone intercommunication AS with " INVITE " forwards.
Step 713, PoC-Phone intercommunication AS is in the side towards PoC Server, send " INVITE " message of assembling to CCCF/NcDS, the SDP information in the message has been indicated the media process information of PoC-Phone intercommunication AS towards PoC Server side, represents with SDP4.The session that PoC-Phone intercommunication AS sends to CCCF/NeDS also can send to SCIM earlier, is routed to CCCF/NcDS by SCIM again, has only described PoC-Phone intercommunication AS in the present embodiment and has directly sent the flow process of session to CCCF/NeDS.
Step 714, CCCF/NeDS searches the current IMS session branch of carrying out of user A, carries out the customer call switching processing.
Step 715, CCCF/NeDS sends " UPDATE " sip request message to the calling branch of the other end user B of this calling association, this message is issued other end user B by S-CSCF, IMS Core and PoCServer etc. among the SCIM, user B upgrades VCC and switches user, i.e. the medium SDP information of user A.
Step 716, the terminal of user B are received the SIP request of " UPDATE ", obtain the new media transmitting-receiving parameter information that VCC switches user A, and return " 200 OK " response, finish to confirm " UPDATE " process." UPDATE " response message is given CCCF/NeDS by routing forwarding such as S-CSCF among PoC Server, IMS Core, the SCIM.
Step 717, CCCF/NeDS returns " 200 OK " response to PoC-Phone intercommunication AS, is successfully accepted and handles with response " INVITE ".Attached the current media parameter information PoC SDP1 of communication other end user B in the message body.
Step 718, PoC-Phone intercommunication AS returns " ACK " message to CCCF/NeDS, to confirm to receive " 200 OK " response.
Step 719, PoC-Phone intercommunication AS returns " 200 OK " response to the session of switching user A one side, has attached the media resource descriptor that intercommunication AS prepares for the telephone service that switches user A one side among its BODY, represents with SDP5." 200 OK " message is routed to MGCF by SCIM, IMS Core, and MGCF carries out the signaling conversion process to circuit domain one side.
Step 720, MGCF returns " ACK " message to PoC-Phone intercommunication AS, to confirm to receive " 200 OK " response.
Step 721 is switched the mutual and foundation of new calling branch success, and CCCF/NeDS begins to discharge the calling branch before VCC switches, and sends SIP request " BYE " to the PoC of user A client PoC Client A for this reason.
Step 722, PoC Client A returns " 200 OK " response message to CCCF/NeDS.
Step 723, PoC Server sends the TBCP message of " Talk Burst Taken " to PoC-Phone intercommunication AS, PoC-Phone intercommunication AS is converted to prompt tone with corresponding right of speech status message " Talk Burst Taken ", send to the terminal PoC Client A of user A by MGCF, this moment, PoC ClientA realized the function of the plain old telephone terminal in CS territory, became CS territory telephone terminal (CS Phone) at this.PoC Server sends the user's voice Media Stream of making a speech to PoC-Phone intercommunication AS, and PoC-Phone intercommunication AS will be transmitted to CS Phone by MGCF from the audio medium stream that PoC Server receives.
Step 724, the PoC terminal PoC Client A of user A is according to wireless conditions, and the PS territory is switched go back in decision.
Step 725, the VCC switching management module among the PoC Client A is called the PoC client software and is made a call to CCCF/NeDS, sends SIP request " INVITE " message to CCCF/NeDS, and the Request-URI of this message is that VCC switches PSI.After " INVITE " message was routed to SCIM by IMS Core, SCIM judged the consistent of the type of service of the calling be switched and new calling branch, need not business intercommunication conversion, and therefore, SCIM is routed to CCCF/NeDS with " INVITE " message.
Step 726, CCCF/NeDS searches the current IMS session branch of carrying out of user, carry out the preparation that customer call switches, calling branch to the other end user B of this calling association sends " UPDATE ", message, this message has been issued other end user B by the S-CSCF among the SCIM, to upgrade the medium SDP information that VCC switches user A to him.
Step 727, the SIP request that the terminal of communication other end user B is received " UPDATE ", acquisition VCC returns " 200 OK " response after switching the new media transmitting-receiving parameter information of user A, finishes to confirm " UPDATE " process." UPDATE " response message is issued CCCF/NeDS by S-CSCF.
Step 728, CCCF/NeDS returns " 200OK " response to PoC Client A, successfully accepts and handles " INVITE " message respond, has attached the current media parameter information of other end user B of communicating by letter in this message body.
Step 729, PoC Client A returns " ACK " message to CCCF/NeDS, to confirm to receive " 200 OK " response.
Step 730 is switched the mutual and foundation of new calling branch success, and CCCF/NeDS begins to discharge the calling branch before VCC switches, and sends the SIP request of " BYE " to PoC-Phone intercommunication AS for this reason.
Step 731, PoC-Phone intercommunication AS returns " 200OK " response of " BYE " request to CCCF/NeDS.
Step 832, PoC-Phone intercommunication AS sends " BYE " request to the telephone service side, and MGCF begins to discharge circuit domain call.
Step 733, circuit domain call discharge to be finished, and MGCF returns " 200OK " response, calls out to discharge with response and finishes.
Step 734, PoC Server sends the audio medium stream of PoC service afterwards to the TBCP message of PoC Client A transmission " Talk Burst Taken " to PoC Client A.
In the said process, when user A switched between PS territory and CS territory, its PoC service of setting up in the PS territory did not at first interrupt, and obtained to experience preferably.
Fig. 8 is the embodiment of the invention, a kind of structured flowchart of realizing the system of IMS business intercommunication.As shown in Figure 8, this system comprises intercommunication AS802, session initiation entity 803 and the purpose terminal 804 of SCIM 801, current business and purpose terminal institute supporting business.
In Fig. 8, entity 803 is initiated in session, be used for initiating a session request to purpose terminal 804, but purpose terminal 804 is not supported the type of service of its conversation request, and the conversation request that entity is initiated in session at first is routed to SCIM 801.
SCIM 801, be used to obtain the professional ability information of purpose terminal 804, for example obtain its professional ability information by the third-party registration process of purpose terminal 804, and after the conversation request that receives session initiation entity, whether the business that the testing goal terminal is supported is complementary with the type of service of current sessions request, whether the business that further detects the current sessions request when not matching can convert the business that purpose terminal 804 is supported to by business intercommunication AS 802, be then, the current sessions request be transmitted to the intercommunication AS 802 of current business and purpose terminal institute supporting business.
The intercommunication AS 802 of current business and purpose terminal institute supporting business after receiving the current sessions request that SCIM 801 sends, converts the business of current sessions request the business of purpose terminal institute 804 supports to, and sends to purpose terminal 804.
Fig. 9 is the embodiment of the invention, the structured flowchart of SCIM among Fig. 8.As shown in Figure 9, SCIM 801 comprises: professional ability acquisition module 901, professional matching detection module 902 and business intercommunication detection module 903.Wherein, the professional ability acquisition module is used to obtain the professional ability information of purpose terminal; Whether professional matching detection module 902 is used for business that the testing goal terminal supported and is complementary with the type of service of current sessions request; Business intercommunication detection module 903, can be used to detect two kinds of different business carry out the intercommunication conversion by these two kinds of service intercommunication AS.
When as shown in Figure 5, obtain the professional ability of purpose terminal by S-CSCF, and under the business supported of the testing goal terminal situation about whether being complementary with the type of service of current sessions request: system shown in Figure 8 can further include S-CSCF, at this moment, S-CSCF comprises the professional ability acquisition module of the professional ability information that is used to obtain the purpose terminal and is used for the matching detection module whether business that the testing goal terminal supported is complementary with the type of service of current sessions request, no longer repeats here.
Figure 10 is the embodiment of the invention, the structured flowchart of the system that a kind of VCC that realizes PoC service switches.As shown in figure 10, this system comprises: SCIM 1001, CCCF 1002 and PoC-Phone intercommunication AS 1003, PoC server 1004 and PoC terminal 1005.
In Figure 10, PoC terminal 1005 can the supporting telephone business and the VCC of PoC service switch, when the PS territory switches to the CS territory, send the telephone service requests at PoC service to SCIM 1001; When the CS territory switches to the PS territory, send the PoC service requests at PoC service to SCIM 1001.
PoC server 1004 is used to provide PoC service.
SCIM 1001, be used for setting up process in business the PoC service request that PoC server 1004 sends is transmitted to CCCF 1002; , receive the telephone service request that PoC terminal 1005 sends, and be transmitted to PoC-Phone intercommunication AS 1003 when the PS territory switches to the CS territory at PoC service; , receive the PoC service request that PoC terminal 1005 sends, and be transmitted to CCCF 1002 when the CS territory switches to the PS territory at PoC service;
CCCF 1002, are used for setting up process in business, receive the PoC service request that SCIM 1001 sends, and finish PoC server 1004 and be connected with PoC service between the PoC terminal 1005, specifically referring to the step 702 among Fig. 7 to step 708; At PoC service when the PS territory switches to the CS territory, receive the PoC service request that business intercommunication AS 1003 sends after, finish the VCC of PoC service and switch from the PS territory to the CS territory, specifically referring to the step 714 among Fig. 7 to 723; , after receiving the PoC service request that SCIM 1001 sends, finish the VCC of PoC service and switch when the CS territory switches to the PS territory at PoC service from the CS territory to the PS territory, specifically referring to the step 726 among Fig. 7 to step 734.
PoC-Phone intercommunication AS 1003 is used at PoC service receiving the telephone service request that SCIM 1001 sends when the PS territory switches to the CS territory, and after PoC service and telephone service carried out the intercommunication conversion process, sends the PoC service requests to CCCF 1002.PoC-Phone intercommunication AS 1003 also can be transmitted to CCCF1002 by SCIM 1001 to the PoC service request that CCCF 1002 sends, be PoC-Phone intercommunication AS 1003 with CCCF 1002 between can directly intercom mutually, also can communicate, so the with dashed lines arrow is represented among Figure 10 by the SCIM forwarding.
When system shown in Figure 10, the scope that makes the user cover from the PS territory move to the scope of CS territory covering, the PoC service that can continue to have set up.
Figure 11 is the structured flowchart of the PoC terminal among Figure 10.As shown in figure 11, PoC terminal 1005 comprises VCC switching management module 1101, PoC client software module 1102 and circuit domain phone software module 1103, wherein,
VCC switching management module 1101 is used for sending control information to PoC client software module 1102 and circuit domain phone software module 1103;
PoC client software module 1102 is used to initiate and receive the session of PoC service, and after the control information that receives 1101 transmissions of VCC switching management module, initiates the PoC service request;
Circuit domain phone software module 1103 is used for initiating the telephone service request after the control information that receives 1101 transmissions of VCC switching management module.
By the above embodiment of the present invention as seen, whether can convert the business that the purpose terminal is supported to by the business that makes SCIM detect the current sessions request by the business intercommunication application server, if then the current sessions request is transmitted to the business intercommunication application server; After the business intercommunication application server receives the current sessions request of SCIM transmission, convert the business of current sessions request to business that the purpose terminal is supported, send to the technical scheme of purpose terminal, make and do not support the terminal of current business can receive current business, thereby better user experience can be provided.The embodiment of the invention is also switched by the VCC that realizes PoC service, when the scope that makes the user cover from the PS territory moves to the scope of CS territory covering, and the PoC service that can continue to have set up.
The above is embodiments of the invention only, is not to be used to limit protection scope of the present invention, all any modifications of being made within the spirit and principles in the present invention, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (16)

1, a kind of method that realizes IP Multimedia System IMS business intercommunication is characterized in that, this method comprises:
A, when the purpose terminal is not supported the type of service of current sessions request, whether the business that professional ability interaction management device SCIM detects the current sessions request can convert the business that the purpose terminal is supported to by the intercommunication application server of current business and purpose terminal institute supporting business, if, then the current sessions request is transmitted to the intercommunication application server of described current business and purpose terminal institute supporting business, execution in step B; Otherwise the initiator returns failure response to the current sessions request, process ends;
After the intercommunication application server of B, described current business and purpose terminal institute supporting business receives the current sessions request that SCIM sends, convert the business of current sessions request to business that the purpose terminal is supported, send to the purpose terminal.
2, the method for claim 1 is characterized in that, this method further comprised before steps A: whether the business that conversation control function entity S-CSCF or SCIM testing goal terminal are supported is complementary with the type of service of current sessions request.
3, method as claimed in claim 2, it is characterized in that further comprised: S-CSCF or SCIM obtain the professional ability information of purpose terminal before whether business that described S-CSCF or SCIM testing goal terminal are supported is complementary with the type of service of current sessions request.
4, method as claimed in claim 3 is characterized in that, the professional ability information that described SCIM obtains the purpose terminal comprises: SCIM obtains the professional ability information of purpose terminal by third-party registration; Or SCIM adopts the mode of local configuration to obtain the professional ability information of purpose terminal.
As claim 1,2,3 or 4 described methods, it is characterized in that 5, described current sessions request is the request of PTT PoC service, described purpose terminal is not support the telephone service terminal of PoC service.
6, a kind of system that realizes the IMS business intercommunication is characterized in that, this system comprises:
SCIM, be used for when the purpose terminal is not supported the type of service of current sessions request, whether the business that detects the current sessions request can convert the business that the purpose terminal is supported to by the intercommunication application server of current business and purpose terminal institute supporting business, if then the current sessions request is transmitted to the intercommunication application server of described current business and purpose terminal institute supporting business; Otherwise the initiator returns failure response to the current sessions request;
The intercommunication application server of current business and purpose terminal institute supporting business is used for after receiving the current sessions request that SCIM sends, and converts the business of current sessions request to business that the purpose terminal is supported, sends to the purpose terminal.
Whether 7, system as claimed in claim 6 is characterized in that, described SCIM further comprises professional matching detection module, be used for business that the testing goal terminal supported and be complementary with the type of service of current sessions request.
Whether 8, the described system of claim 6 is characterized in that, this system further comprises S-CSCF, be used for business that the testing goal terminal supported and be complementary with the type of service of current sessions request, and send testing result to SCIM.
9, system as claimed in claim 7 is characterized in that, described SCIM further comprises the professional ability acquisition module, is used to obtain the professional ability information of purpose terminal.
10, system as claimed in claim 8 is characterized in that, described S-CSCF further comprises the professional ability acquisition module, is used to obtain the professional ability information of purpose terminal.
11, a kind of professional ability interaction management device SCIM, it is characterized in that, this SCIM comprises the business intercommunication detection module, be used to detect two kinds of different business and can carry out the intercommunication conversion, when the purpose terminal is not supported the type of service of current sessions request, whether the business that detects the current sessions request can convert the business that the purpose terminal is supported to by the intercommunication application server of current business and purpose terminal institute supporting business, if then the current sessions request is transmitted to the intercommunication application server of described current business and purpose terminal institute supporting business; Otherwise the initiator returns failure response to the current sessions request.
12, a kind of method that realizes the VCC switching of PoC service is characterized in that this method comprises:
Set up in the process at PoC service, SCIM is transmitted to CCCF with the PoC service request that the PoC server sends, and CCCF finishes the PoC server and is connected with PoC service between the PoC terminal;
When PoC service when packet switching PS territory switches to the circuit switching (CS) territory, the PoC terminal sends the telephone service request to SCIM; SCIM detects PoC service and carries out the PS territory when switching to the VCC in CS territory, detect PoC service and whether can convert telephone service to by the intercommunication application server of PoC service and telephone service, if then described telephone service request is sent to the intercommunication application server of PoC service and telephone service; The intercommunication application server of PoC service and telephone service sends the PoC service request to CCCF after PoC service and telephone service are carried out the intercommunication conversion process; After CCCF receives described PoC service request, finish the VCC of PoC service and switch from the PS territory to the CS territory.
13, method as claimed in claim 12 is characterized in that, when PoC service when the CS territory switches to the PS territory, this method further comprises: the PoC terminal sends the PoC service request to SCIM; SCIM detects PoC service and carries out the CS territory when switching to the VCC in PS territory, and described PoC service request is sent to CCCF; After CCCF receives described PoC service request, finish the VCC of PoC service and switch from the CS territory to the PS territory.
14, method as claimed in claim 13 is characterized in that,
Described PoC terminal sends the telephone service request to SCIM and comprises: the PoC terminal is according to wireless conditions, and the circuit domain phone software in the control PoC terminal sends the telephone service request to SCIM;
Described PoC terminal sends the PoC service request to SCIM and comprises: the PoC terminal is according to wireless conditions, and the PoC client software in the control PoC terminal sends the PoC service request to SCIM.
15, a kind of system that realizes the VCC switching of PoC service is characterized in that this system comprises:
SCIM is used for setting up process in business the PoC service request that the PoC server sends is transmitted to CCCF; At PoC service when the PS territory switches to the CS territory, receive the telephone service request that the PoC terminal sends, detect PoC service and whether can convert telephone service to by the intercommunication application server of PoC service and telephone service, if then the telephone service request that described PoC terminal is sent is transmitted to the intercommunication application server of PoC service and telephone service;
CCCF is used for setting up process in business, receives the PoC service request that SCIM sends, and finishes the PoC server and be connected with PoC service between the PoC terminal; At PoC service when the PS territory switches to the CS territory, receive the PoC service request that the intercommunication application server of PoC service and telephone service sends after, finish the VCC of PoC service and switch from the PS territory to the CS territory;
The intercommunication application server of PoC service and telephone service is used at PoC service receiving the telephone service request that SCIM sends when the PS territory switches to the CS territory, and after PoC service and telephone service carried out the intercommunication conversion process, sends the PoC service request to CCCF;
The PoC terminal is used at PoC service sending the telephone service request to SCIM when the PS territory switches to the CS territory.
16, system as claimed in claim 15 is characterized in that, when PoC service when the CS territory switches to the PS territory,
Described PoC terminal is further used for, and sends the PoC service request to SCIM;
Described SCIM is further used for, and receives the PoC service request that the PoC terminal sends, and is transmitted to CCCF;
Described CCCF is further used for, and after the PoC service request that receives the SCIM transmission, finishes the VCC of PoC service from the CS territory to the PS territory and switches.
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