CN101217796B - A realization method of call ending in IP multimedia subsystem centralized control operation - Google Patents
A realization method of call ending in IP multimedia subsystem centralized control operation Download PDFInfo
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- CN101217796B CN101217796B CN2008100018230A CN200810001823A CN101217796B CN 101217796 B CN101217796 B CN 101217796B CN 2008100018230 A CN2008100018230 A CN 2008100018230A CN 200810001823 A CN200810001823 A CN 200810001823A CN 101217796 B CN101217796 B CN 101217796B
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Abstract
The invention discloses a realization method of a callee in an IP multimedia sub-system integral control service, comprising the following steps: (a) after receiving the session request message of a calling subscriber, an IP multimedia sub-system IMS circuit field control function ICCF initiates the interaction of a session request to a called user equipment UE through a session control path; (b) after achieving the interaction of the session request with the called UE, the IMS circuit field control function ICCF obtains the roaming number of the called UE; the ICCF establishes a carrying control path to the UE according to the roaming number and achieves the establishment of call. By adopting the method, the invention can shorten the occupying time to the circuit field roaming number resource in the call establishment process, and provides a resolvent to the IMS integral control service call method.
Description
Technical field
The present invention relates to the communications field, relate more specifically to the implementation method of exhaling eventually in a kind of IP Multimedia System centralized control business.
Background technology
IP (network interconnection agreement, Internet Protocol, be called for short IP) IP multimedia subsystem, IMS (IPMultimedia Core Network Subsystem, be called for short IMS) be by third generation partner program (3rdGeneration Partnership Proiect, abbreviation 3GPP) a kind of IP-based network framework that proposes, it has made up an opening and service environment flexibly, supports multimedia application, and provides abundant multimedia service for the user.
IMS is based on the communication network framework of IP, irrelevant with access technology, except being GPRS (General Packet Radio Service, GPRS), WLAN (Wireless LocalArea Network, WLAN (wireless local area network)) etc. packet access network provides outside the business, can also be GSM (Global System for Mobile communications, global system for mobile communications), UMTS mobile cellular networks such as (Universal Mobile Telecommunications System, unified mobile communcations systems) provides professional.
Mobile cellular network such as GSM, UMTS adopts circuit-switched technology, is called circuit (CircuitSwitched is called for short CS) territory, can provide basic speech business for the user, and based on the supplementary service of speech business.When IMS was inserted in the CS territory, it developed into a kind of access way, and business provides by IMS is unified fully, and this technology is called IMS centralized traffic (IMS Centralized Service is called for short ICS).
The IMS centralized traffic has the following advantages:
(1) IMS provides consistent business for access waies such as circuit domain, packet domain, and network enabled merges;
(2) support the CS network to the evolution of IMS network;
(3) not only support to have ICS ability subscriber equipment (ICS UE), also support the existing subscriber equipment (non ICS UE) that does not possess the ICS ability.
Fig. 1 is an IMS centralized traffic application scenarios session path schematic diagram, comprising following network element:
User terminal (User Equipment is called for short UE) 101
Visited Mobile Switching Center (Visited Mobile Switch Center, be called for short VMSC) 102 home subscriber servers (Home Subscriber Server, be called for short HSS) 103 MGCFs (Media Gateway Control Function, be called for short MGCF) 104 media gateway (Media Gateway is called for short MGW) 105
IMS circuit domain control function (IMS CS Control Function, abbreviation ICCF) ICCF 106 in 106 CSCFs (Call Session Control Function is called for short CSCF) 107UE 101 to IMS territories sets up three kinds of paths: session control path, carrying control path and bearer path.Wherein there is dual mode in the session control path,
(1) be carried on the CS territory, adopt unstructured supplementary service data (UnstructuredSupplementary Service Data is called for short USSD), this path is through VMSC 102 and HSS103.
(2) be carried on PS (packet switching, Packet Switch the is called for short PS) territory, adopt session initiation protocol (Session Initial Protocol is called for short SIP) agreement, this path arrives ICCF106 through the CSCF 107 in IP bearer network, the IMS territory.
Carrying control path UE101 adopts the CS control signaling of standard to insert VMSC 102, and is linked into IMS by MGCF 104, arrives ICCF 106 by CSCF107.
Bearer path is by being that UE 101 is linked into IMS by VMSC 102 and MGW 105, and sets up medium with the remote user equipment of this session and be connected.
Session control path and carrying control path are converged at ICCF 106, constitute ICS UE calling branch, and ICCF 106 serves as the IMS user agent simultaneously, replaces subscriber equipment to insert IMS, constitutes the far-end calling branch.
The IMS centralized traffic is utilized the interactive sessions control information between UE 101 and ICCF 106 of session control path, and sets up and the control media bearer by carrying control path, thereby ICS UE is linked among the IMS.
Fig. 2 exhales (called) flow process the end of existing scheme.Idiographic flow is as follows:
201) CSCF of service called UE receives the SIP conversation request;
202) ICCF receives the SIP conversation request that CSCF transmits;
203) ICCF obtains called roaming number, and described roaming number is distributed by VMSC;
204) ICCF serves as the agency back-to-back (Back to Back User Agent, B2BUA) of called UE, initiates a session request to called UE by the session control path, and called UE responds described conversation request message;
205) ICCF utilizes the CS territory roaming number that obtains called UE, initiates to the SIP of called UE conversation request, and this message at first is sent to CSCF;
206) CSCF is transmitted to MGCF with the SIP conversation request;
207) MGCF, sets up and goes into to call out the roaming number that back release VMSC distributes after VMSC receives described message to the initial address message that the VMSC of service called UE sends out ISUP (integrated digital service-user part signaling, ISDN User Part);
208) VMSC initiates to exhale eventually foundation to UE;
209) the called connection process is set up, and whole call setup enters conversation state.
Roaming number is the limited number resource in traditional C territory, and in general, the roaming number quantity of office's setting can both satisfy the demand of this innings telephone traffic, and certain surplus is all arranged.If but roaming number is taken simultaneously by a plurality of callings and is not discharged, just may cause roaming number to exhaust, some are called out owing to can't be assigned to roaming number, make call failure.
Exhale flow process to be not difficult to find out from the end of existing calling, VMSC needs ICCF at first to initiate a session request to UE by the session control path, after UE responds described conversation request message after distributing roaming number, ICCF could make a call to VMSC by roaming, and this moment, VMSC could discharge roaming number.So just may occur in the session control path when unusual, the roaming number resource is taken always.Under PS session control path, following problem can appear particularly:
When the PS passage adopts the low speed passage, ICCF initiates a session request and UE time of answering of echoing is approximately 2～4 seconds to UE, and the time of obtaining a roaming number generally can not surpass 1 second, and therefore taking the roaming number time here will be in the past more than 2 times.
VMSC is unknowable to the state of PS, and is unusual if PS occurs, and VMSC does not know that also ICCF just can initiate follow-up calling after then need waiting for the conversation request response, so also may cause and take the roaming number resource for a long time.
Summary of the invention
The technical problem to be solved in the present invention provides in a kind of IP Multimedia System centralized control business the implementation method of exhaling eventually, shortens the holding time of exhaling eventually in the process of foundation circuit domain roaming number resource.
In order to solve the problems of the technologies described above, the invention provides the implementation method of exhaling eventually in a kind of IP Multimedia System centralized control business, may further comprise the steps:
(a) after IP Multimedia System IMS circuit domain control function ICCF receives calling subscriber's conversation request message, by the session control path to called subscriber equipment UE initiate a session request mutual;
(b) described IMS circuit domain control function ICCF finish with the conversation request of described called UE mutual after, obtain the roaming number of described called UE, described ICCF is established to the carrying control path of UE according to described roaming number, and finishes the foundation of exhaling eventually.
Further, in described step (a), described session control path is packet-switched domain PS session control path or circuit domain CS session control path.
Further, described CS session control path is meant the path through Visited Mobile Switching Center VMSC, home subscriber server HSS and ICCF; Described PS session control path is meant the path through IP bearer network, CSCF CSCF and ICCF.
Further, in described step (a), when called UE initiated a session request, UE returned corresponding response message according to the session initiation protocol Session Initiation Protocol to described ICCF on PS session control path by PS session control path; When called UE initiated a session request, UE returned corresponding response message according to unstructured supplementary service data USSD agreement to described ICCF on CS session control path by CS session control path.
Further, in described step (b), comprise following steps:
(c) described ICCF utilizes the described roaming number that obtains after obtaining the roaming number of called UE, sends the SIP conversation request of called UE to CSCF;
(d) described CSCF is transmitted to MGCF MGCF with described SIP conversation request;
(e) described MGCF sends the initial address message of integrated digital service-user part signaling ISUP to the Visited Mobile Switching Center VMSC of service called UE;
(f) described VMSC receives the initial address message of described ISUP, sets up and goes into to call out, and initiates called foundation to UE;
(g) called UE correlating sessions control PATH and carrying control PATH are finished and are exhaled follow-up continuing eventually.
Further, described roaming number is distributed by Visited Mobile Switching Center VMSC.
Further, in described step (f), described VMSC receives the initial address message of described ISUP, sets up and goes into to call out the described roaming number of back release.
Adopt the method for the invention, can shorten the holding time of exhaling eventually in the process of foundation, and provide a solution for IMS centralized control service final call method circuit domain (CS) roaming number resource.
Description of drawings
Fig. 1 is the Organization Chart of IMS centralized control business;
Fig. 2 is the flow chart of existing IMS centralized control service final call method;
Fig. 3 is the flow chart of the IMS centralized control service final call method of present embodiment.
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
As shown in Figure 3, the implementation method of exhaling eventually in the IMS centralized control business may further comprise the steps:
301) CSCF of service called UE receives the SIP conversation request;
302) ICCF receives the SIP conversation request that CSCF transmits;
303) ICCF serves as the agency back-to-back (Back to Back User Agent, B2BUA) of called UE, initiates a session request to called UE by the session control path, and called UE responds described conversation request message;
Described session control path is PS session control path or CS session control path, and UE returns corresponding response message according to described session control path on respective paths.Be ICCF by PS session control path when called UE initiates a session request, UE returns corresponding response message according to Session Initiation Protocol on PS session control path; When called UE initiated a session request, UE returned corresponding response message according to the USSD agreement to ICCF on CS session control path by CS session control path.
304) ICCF obtains the roaming number of called UE, and described roaming number is distributed by VMSC;
305) ICCF utilizes the roaming number in the CS territory that obtains called UE, initiates to the SIP of called UE conversation request, and this message at first is sent to CSCF;
306) CSCF is transmitted to MGCF with the SIP conversation request;
307) MGCF sends out the initial address message of ISUP to the VMSC of service called UE, and VMSC receives described message, sets up to go into to call out the back and discharge the roaming number that VMSC distributes;
308) VMSC initiates to exhale eventually foundation to UE;
309) UE correlating sessions control PATH and carrying control PATH are finished eventually and are exhaled follow-up continuing, and whole call setup enters talking state.
By said method as can be known, ICCF initiates a session request to UE by the session control path, after UE responds described conversation request message, the VMSC roaming number of reallocating, shorten the holding time of exhaling eventually in the process of foundation to circuit domain (CS) roaming number resource, also overcome simultaneously in the existing method under PS session control path, occurred to initiate the occupation problem that subsequent voice calls causes after ICCF need wait for the conversation request response when unusual the roaming number resource owing to the PS passage adopts low speed passage or PS.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (5)
1. the implementation method of exhaling eventually in the IP Multimedia System centralized control business may further comprise the steps:
(a) after IP Multimedia System IMS circuit domain control function ICCF receives calling subscriber's conversation request message, by the session control path to called subscriber equipment UE initiate a session request mutual; In described step (a), described session control path is packet-switched domain PS session control path or circuit domain CS session control path;
(b) described IMS circuit domain control function ICCF finish with the conversation request of described called UE mutual after, obtain the roaming number of described called UE, described ICCF is established to the carrying control path of UE according to described roaming number, and finishes the foundation of exhaling eventually;
In described step (a), when called UE initiated a session request, UE returned corresponding response message according to the session initiation protocol Session Initiation Protocol to described ICCF on PS session control path by PS session control path; When called UE initiated a session request, UE returned corresponding response message according to unstructured supplementary service data USSD agreement to described ICCF on CS session control path by CS session control path.
2. the method for claim 1 is characterized in that,
Described CS session control path is meant the path through Visited Mobile Switching Center VMSC, home subscriber server HSS and ICCF; Described PS session control path is meant the path through IP bearer network, CSCF CSCF and ICCF.
3. the method for claim 1 is characterized in that,
In described step (b), comprise following steps:
(c) described ICCF utilizes the described roaming number that obtains after obtaining the roaming number of called UE, sends the SIP conversation request of called UE to CSCF;
(d) described CSCF is transmitted to MGCF MGCF with described SIP conversation request;
(e) described MGCF sends the initial address message of integrated digital service-user part signaling ISUP to the Visited Mobile Switching Center VMSC of service called UE;
(f) described VMSC receives the initial address message of described ISUP, sets up and goes into to call out, and initiates called foundation to UE;
(g) message in the message in called UE correlating sessions control path and carrying control path is finished and is exhaled follow-up continuing eventually.
4. as claim 1 or 3 described methods, it is characterized in that,
Described roaming number is distributed by Visited Mobile Switching Center VMSC.
5. method as claimed in claim 3 is characterized in that,
In described step (f), described VMSC receives the initial address message of described ISUP, sets up and goes into to call out the described roaming number of back release.
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| CN101931902B (en) * | 2009-06-26 | 2014-06-11 | 中兴通讯股份有限公司 | Service implementation method and system of IP multimedia subsystem network |
| CN102244928B (en) * | 2010-05-13 | 2016-06-01 | 中兴通讯股份有限公司 | A kind of audio call is exhaled, is risen and exhale method for building up, Apparatus and system |
| CN102572776B (en) * | 2010-12-28 | 2016-04-13 | 中兴通讯股份有限公司 | The method and system of triggering terminal registration |
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| CN1874543A (en) * | 2005-10-22 | 2006-12-06 | 华为技术有限公司 | System and method for traditional mobile terminal to access domain of multimedia |
| CN1949752A (en) * | 2005-10-13 | 2007-04-18 | 华为技术有限公司 | System and method for communication of circuit exchange network and IP multimedia subsystem network |
| CN101090562A (en) * | 2006-06-15 | 2007-12-19 | 华为技术有限公司 | Method and device for sending user terminal position information in IP multi-medium subsystem |
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| CN1949752A (en) * | 2005-10-13 | 2007-04-18 | 华为技术有限公司 | System and method for communication of circuit exchange network and IP multimedia subsystem network |
| CN1874543A (en) * | 2005-10-22 | 2006-12-06 | 华为技术有限公司 | System and method for traditional mobile terminal to access domain of multimedia |
| CN101090562A (en) * | 2006-06-15 | 2007-12-19 | 华为技术有限公司 | Method and device for sending user terminal position information in IP multi-medium subsystem |
Non-Patent Citations (7)
| Title |
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| 3GPP Organizational Partners.3rd Generation Partnership Project |
| 3GPP Organizational Partners.3rd Generation Partnership Project Technical Specification Group Services and System Aspects IP Multimedia System (IMS) centralized services(Release 8).《3GPP TR 23.892 V0.5.6》.2007,第35-36页第6.6.2.2.3节中步骤7-16 第43页第6.7节;44页图6.7.1-1;第45-46页第6.7.2.2.1节中图6.7.2.2.1-1及步骤1-6). * |
| 44页图6.7.1-1 |
| IP Multimedia System (IMS) centralized services(Release 8).《3GPP TR 23.892 V0.5.6》.2007,第35-36页第6.6.2.2.3节中步骤7－16 |
| Technical Specification Group Services and System Aspects |
| 第43页第6.7节 |
| 第45－46页第6.7.2.2.1节中图6.7.2.2.1－1及步骤1－6）. |
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