CN101102614A - Method for user to determine user busy forward in IMS centrally controlled service - Google Patents
Method for user to determine user busy forward in IMS centrally controlled service Download PDFInfo
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- CN101102614A CN101102614A CNA2007101431599A CN200710143159A CN101102614A CN 101102614 A CN101102614 A CN 101102614A CN A2007101431599 A CNA2007101431599 A CN A2007101431599A CN 200710143159 A CN200710143159 A CN 200710143159A CN 101102614 A CN101102614 A CN 101102614A
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Abstract
The method is used for realizing the call forwarding when the IMS domain user established by using calling process or called process is taken as the called side of the calling circuit switch domain user to be called. It comprises: when the IMS domain user is taken as the calling side, after the call which takes circuit switch domain user is as the called side is established, the called user rejects current call; the called user end sends the session initiation protocol (SIP) message used for indicating the user is on busy by user to the IMS circuit domain control function (ICCF) through the packet switch domain session control path; the ICCF relays the SIP message to the telecommunication application server (TAS); the TAS realizes the user-decided call forwarding on busy service.
Description
Technical field
The present invention relates to communication technical field, relate in particular to the method that realizes the User Determined User Busy Call Forwarding in a kind of IMS 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 Project, 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).
Fig. 1 is the Organization Chart of this scene in the IMS centralized control business, and following network element is arranged:
101 subscriber equipmenies (User Equipment, UE)
102 Visited Mobile Switching Centers (Visited Mobile Switch Center, VMSC)
103 home subscriber servers (Home Subscriber Server, HSS)
104 MGCFs (Media Gateway Control Function, MGCF)
105 media gateway (Media Gateway, MGW)
106 IMS circuit domain control function (IMS CS Control Function, ICCF)
107 CSCFs (Call Session Control Function, CSCF)
(Telephony Application Server TAS), is called supplementary business server again to 108 telecommunication service application servers.
UE builds together in 101 to IMS territories and founds 3 paths, is respectively: session control path, carrying control path and bearer path.
The session control path is carried on the PS territory, transmits session information between UE 101 and ICCF 106, and adopts session initiation protocol (Session Initial Protocol is called for short SIP) agreement.This path is through the CSCF 107 in IP bearer network, the IMS territory.
The foundation of bearer path and the management of bearing resource are being controlled in carrying control path, and UE 101 adopts the CS control signaling of standard to insert VMSC 102, and is linked into IMS by MGCF 104, arrives ICCF through CSCF 107.
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.
TAS 108 servers can provide numerous supplementary services such as calling out maintenance, calling transfer, number demonstration for the user, therefore are called supplementary business server again.
Call Forwarding services are a kind of supplementary services in the communication system, its branch unconditioned call connection, no-answer call connection, user (the Communication Forwarding Busy that calls forwarding on busy, be called for short CFB) etc. situation, wherein user busy call forward is divided into Network Determined User Busy and two kinds of situations of User Determined User Busy again.The busy User Status that is meant Network records of network decision is in the conversation as the user for busy; User Determined User Busy is meant after the mobile subscriber receives the ring up notice and directly rejects response that network is transferred to its calling phone or the voice mail that sets in advance.
ICS must the support call forward-shifting service as a kind of telecommunication system.
Fig. 2 be the prior art scheme on session control path, PS territory, IMS user A calls out the user B that inserts from CS, user B realizes the Call Forwarding flow process by carrying the User Determined User Busy cause value in the release message.Session between user B and the ICCF is set up and is adopted called process, and idiographic flow is as follows:
201, CSCF receives the called SIP conversation request message that Calling Side user A initiates to callee side user B; After CSCF receives the SIP conversation request,, the session request is routed to the TAS that is responsible for Call Forwarding services according to initial filter standard or norm (iFC);
202, the called conversation request message of TAS route, this message is routed to ICCF through CSCF;
203, ICCF obtains called roaming number, and sends a SIP conversation request by session control path, PS territory, and notice UE-B adopts the circuit domain carrying, carries calling subscriber's address (calling number) and conversation description parameter in the conversation request;
204, after ICCF obtains the roaming number of called subscriber B, initiate a new SIP conversation request to user B, and utilize the roaming number that obtains that the session request is routed to CSCF, CSCF utilizes roaming number that the session request is routed to MGCF;
205, MGCF sends out the initial address message (IAM) of ISUP to VMSC;
206, VMSC initiates called foundation request (SETUP) to UE-B, and user B begins ring;
207, the UE-B reason of hurrying because of the user is refused this call request, sends Disconnect on-hook message to VMSC, and carries the User Determined User Busy release cause value of (User Decision User Busy is called for short UDUB);
208, VMSC discharges this Session Resources, and sends release resource (Release) message to MGCF, carries the busy cause value of user in the message;
209, MGCF produces the busy message of SIP 486 users according to the busy cause value of user, and SIP 486 message are issued CSCF, and CSCF is to the busy message of ICCF loopback SIP 486 users;
210, ICCF is to the busy message response message of CSCF loopback SIP 486 users, and CSCF is routed to TAS with the busy response message of SIP 486 users.
211, TAS is by Call Forwarding logical triggering User Determined User Busy Call Forwarding process.
Fig. 3 be the prior art scheme on session control path, PS territory, IMS user A calls out the user B that inserts from CS, realizes the Call Forwarding flow process by TAS.Session between user B and the ICCF is set up and is adopted the caller process, and idiographic flow is as follows:
301, CSCF receives the called SIP conversation request message that Calling Side user A initiates to callee side user B, after CSCF receives the SIP conversation request, according to initial filter standard or norm (iFC), the session request is routed to the TAS that is responsible for Call Forwarding services;
302, the called conversation request message of TAS route, this message is routed to ICCF through CSCF;
303, ICCF is according to the called party information of obtaining, determining called is the UE that supports ICS, so for user B distributes an ICCF address, by session control path, PS territory, initiate a new SIP conversation request, the SIP conversation request that carries the ICCF address is issued user B;
304, after user B receives conversation request message, immediately called number is used as in the ICCF address, makes a call to set up to VMSC and ask;
305, VMSC analyzes the ICCF address, sends out initial address message (IAM) to MGCF;
306, MGCF creates a new SIP conversation request, according to the ICCF address session request is routed to CSCF, and CSCF is routed to ICCF according to the ICCF address with the session request;
307, after ICCF receives conversation request from user B, the session association that session that step 301 is received and step 306 are received, and to CSCF loopback SIP 180 ALERTING messages, CSCF is to MGCF loopback SIP 180 ALERTING messages;
308, after MGCF receives ALERTING message, to the full message of VMSC loopback address (AddressComplete Message is called for short ACM);
309, VMSC is to user B loopback ALERTING message Alerting;
310, user B begins ring, and by session control path, PS territory, sends out SIP 180 ALERTING messages to ICCF;
311, after ICCF receives ALERTING message, initiate SIP 180 ALERTING messages to TAS, this ALERTING message of TAS route is to CSCF;
312, CSCF notice Calling Side user B ring;
313, user B is in subscriber busy condition at this moment, can't answer the session that Calling Side user A initiates, so it refuses this call request, initiates normal on-hook request Disconnect to VMSC, carries normal release message;
314, VMSC discharges this Session Resources, and sends out release (Release) message to MGCF;
315, MGCF will discharge resource request and be converted into SIP CANCEL request, initiate SIP CANCEL request to CSCF, and CSC gives ICCF with SIP CANCEL request route, discharges the session of user B to ICCF;
From existing Call Forwarding flow process as can be seen, when user B and ICCF call setup adopt called process, when user B answers because of the reason refusal that the user hurries, it issues hanging up message and can carrying the User Determined User Busy cause value of VMSC, thereby realizes the User Determined User Busy Call Forwarding services.But when the session control path adopts the PS territory to set up, ICCF and VMSC set up when exhaling carrying control path eventually needs ICCF to obtain the roaming number of a UE-B, ICCF sets up carrying control path with this roaming number and VMSC, how ICCF obtains the form of this number and this number can't be determined in existing procedure, has technological difficulties.When user B and ICCF call setup employing caller process, the User Determined User Busy Call Forwarding services can't realize.This is to answer because of the reason refusal that the user hurries because work as user B, user B issues hanging up message and can't carrying the User Determined User Busy cause value of VMSC, and can only carry the cause value of normal on-hook, therefore when user B adopted caller process and ICCF to set up calling, prior art can't realize the User Determined User Busy Call Forwarding services.
Summary of the invention
The technical problem to be solved in the present invention provides User Determined User Busy Call Forwarding implementation method in a kind of IMS centralized control business, during as called calling, all can realize Call Forwarding as caller circuit commutative field user when adopting caller process or called process to set up IMS territory user.
The present invention is when ICCF and called subscriber set up when calling out, no matter adopt caller process or called process, all by session control path, PS territory, send sip message to ICCF, notice ICCF called subscriber's User Determined User Busy state, ICCF reinforms TAS and triggers the User Determined User Busy Call Forwarding services.
In order to solve the problems of the technologies described above, the invention provides User Determined User Busy Call Forwarding implementation method in a kind of IMS centralized control business, when IMS territory user as caller, the circuit commutative field user as called call setup after, the called subscriber refuses this calling, called subscriber equipment is that the ICCF transmission represents that the session initiation protocol of User Determined User Busy is a sip message by packet-switched domain session control path to the IMS circuit domain control function, by ICCF described sip message being forwarded to the telecommunication service application server is TAS, realizes User Determined User Busy Call Forwarding process by described TAS.
Further, said method also can have following characteristics, after described called subscriber equipment will represent that the SIP information of User Determined User Busy is issued described ICCF, after described called subscriber equipment while or time-delay a period of time, initiatively initiate the media resource dispose procedure, discharge the media resource and the session of having set up between described called subscriber and the ICCF.
Further, said method also can have following characteristics, described called subscriber equipment is initiatively initiated the media resource dispose procedure, further may further comprise the steps: called subscriber equipment is that VMSC sends out release message to Visited Mobile Switching Center, discharges the media resource of described called subscriber equipment to VMSC; Described VMSC is that MGCF sends the ISUP release message to MGCF, discharges the media resource of described VMSC to MGCF; Described MGCF is that CSCF sends SIP cancellation message to ICCF by CSCF, discharges user B to the session between the ICCF.
Further, said method also can have following characteristics, after described called subscriber equipment will represent that the SIP information of User Determined User Busy is issued described ICCF, described ICCF initiatively initiated the media resource dispose procedure, discharged the media resource and the session of having set up between described called subscriber and the ICCF.
Further, said method also can have following characteristics, described ICCF initiatively initiates the media resource dispose procedure, further may further comprise the steps: described ICCF is when sending the sip message of expression User Determined User Busy to described TAS, be that MGCF sends SIP cancellation message to MGCF simultaneously, discharge the session of described ICCF to the called subscriber; Described MGCF cancels message with SIP and changes the ISUP release message into to send to Visited Mobile Switching Center be VMSC, discharges the media resource of described MGCF to VMSC; Described VMSC sends release message to called subscriber equipment, discharges the media resource of described VMSC to called subscriber equipment.
Further, said method also can have following characteristics, and called subscriber equipment sends sip message by packet-switched domain session control path to ICCF and is meant that the sip message of described called subscriber equipment is the ICCF that is routed to of CSCF by CSCF.
Further, said method also can have following characteristics, and described IMS territory user is as caller, and the circuit commutative field user sets up by the caller process of called process or called subscriber equipment as called calling.
Further, said method also can have following characteristics, described employing caller process is set up to exhale eventually and is meant, after described ICCF receives the conversation request of calling subscriber equipment initiation, by session control path, PS territory to the called subscriber equipment request of making a call, called subscriber equipment is set up the caller process that is initiated to described ICCF by circuit domain call, sets up eventually and exhales.
Further, said method also can have following characteristics, and the sip message of described expression User Determined User Busy is SIP 486 message.
Because the present invention sends sip message by session control path, PS territory, notify ICCF called subscriber's User Determined User Busy state, ICCF reinforms TAS and triggers User Determined User Busy Call Forwarding flow process, therefore no matter the calling of called subscriber and ICCF is caller process or called process, can both reliably realize User Determined User Busy Call Forwarding flow process.The present invention simultaneously gives the method that the media resource set up and session discharge.
Description of drawings
Fig. 1 is the group-network construction schematic diagram of IP Multimedia System IMS centralized control business;
Fig. 2 is in the IMS centralized control business, and the user busy call forward flow chart that adopts called process is set up in ICCF and called subscriber's session;
Fig. 3 is in the IMS centralized control business, and the user busy call forward flow chart that adopts the caller process is set up in ICCF and called subscriber's session;
Fig. 4 is in the IMS centralized control business of the present invention, realizes User Determined User Busy Call Forwarding example flow diagram one;
Fig. 5 is in the IMS centralized control business of the present invention, realizes User Determined User Busy Call Forwarding example flow diagram two.
Embodiment
Below in conjunction with drawings and the specific embodiments technical scheme of the present invention is described in detail.
In IMS centralized control business, when the calling subscriber calls out the called subscriber, no matter to set up and adopt the caller process still be called process to the session between called subscriber and the ICCF, can be on session control path, PS territory, the sip message of expression User Determined User Busy is issued ICCF, and ICCF notice TAS initiates User Determined User Busy Call Forwarding process.Below, the flow process of realization User Determined User Busy Call Forwarding and the mode that media resource discharges are described respectively by several embodiments.
First embodiment, as shown in Figure 4, concrete steps are:
401, CSCF receives the called SIP conversation request message that Calling Side user A initiates to callee side user B, after CSCF receives the SIP conversation request, according to initial filter standard or norm (iFC), the session request is routed to the TAS that is responsible for Call Forwarding services;
402, the called conversation request message of TAS route, this message is routed to ICCF through CSCF;
403, ICCF is according to called subscriber B number, is established to the session of called subscriber B by CSCF, and B carries out ring, initiates a called process, sees step 203～206;
Or ICCF is that user B distributes an ICCF address, and user B is according to this ICCF address, is established to the session of ICCF by CSCF, and ICCF is to user B response ALERTING message, and B carries out ring, initiates a caller process, sees step 303～312;
404, user B refuses this and calls out because of the reason that the user hurries, and UE-B generates the sip message of an expression User Determined User Busy, SIP 486 message for example, by session control path, PS territory, these SIP 486 message are issued CSCF, CSCF gives ICCF with this sip message route;
405, ICCF sends to TAS by CSCF again with the busy message of SIP 486 users, notice TAS User Determined User Busy;
406, after TAS receives SIP 486 message, by Call Forwarding logical triggering User Determined User Busy Call Forwarding process;
407, UE-B after ICCF sends the busy message of SIP 486 users, sends out release message to VMSC simultaneously or after delaying time after a while again in step 404, discharges the media resource of user B to VMSC;
Adopting time-delay mainly is to turn over journey in order to allow ICCF receive the busy message of user of user B earlier, to know before will entering customer call.If do not delay time, the resource release message of possible user B arrives ICCF earlier, might cause calling subscriber and called subscriber's session to be released.
408, VMSC sends out ISUP release (Release) message to MGCF, discharges the media resource of VMSC to MGCF;
409, MGCF produces a SIP CANCEL cancellation message, and the SIP CANCEL is issued ICCF by CSCF, discharges user B to the session between the ICCF;
Second embodiment
In the present embodiment, the part different with first embodiment is that the dispose procedure implementation of media resource, first embodiment are that user B initiatively initiates the media resource dispose procedure, and present embodiment is an ICCF initiation media resource dispose procedure, as shown in Figure 5.501～506 and 401～406 steps are one to one, and different steps is as follows:
507, ICCF when TAS transmission SIP 486 users do message, also sends SIP CANCEL cancellation message to MGCF simultaneously in step 505, and release ICCF is to the session of user B;
508, MGCF cancels message with SIP and changes the ISUP release message into and send to VMSC, discharges the media resource of MGCF to VMSC;
509, VMSC sends out release message to user B, discharges the media resource of VMSC to user B.
As can be seen, taking method of the present invention from above-mentioned flow process, is that caller, CS territory user are called situation at IMS territory user, has realized ICS User Determined User Busy Call Forwarding services flow process by PS session control path.
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 (9)
1, User Determined User Busy Call Forwarding implementation method in a kind of IMS centralized control business, it is characterized in that, when IMS territory user as caller, the circuit commutative field user as called call setup after, the called subscriber refuses this calling, called subscriber equipment is that the ICCF transmission represents that the session initiation protocol of User Determined User Busy is a sip message by packet-switched domain session control path to the IMS circuit domain control function, by ICCF described sip message being forwarded to the telecommunication service application server is TAS, realizes User Determined User Busy Call Forwarding process by described TAS.
2, the method for claim 1, it is characterized in that, after described called subscriber equipment will represent that the SIP information of User Determined User Busy is issued described ICCF, after described called subscriber equipment while or time-delay a period of time, initiatively initiate the media resource dispose procedure, discharge the media resource and the session of having set up between described called subscriber and the ICCF.
3, method as claimed in claim 2 is characterized in that, described called subscriber equipment is initiatively initiated the media resource dispose procedure, further may further comprise the steps:
Called subscriber equipment is that VMSC sends out release message to Visited Mobile Switching Center, discharges the media resource of described called subscriber equipment to VMSC;
Described VMSC is that MGCF sends the ISUP release message to MGCF, discharges the media resource of described VMSC to MGCF;
Described MGCF is that CSCF sends SIP cancellation message to ICCF by CSCF, discharges user B to the session between the ICCF.
4, the method for claim 1, it is characterized in that, after described called subscriber equipment will represent that the SIP information of User Determined User Busy is issued described ICCF, described ICCF initiatively initiated the media resource dispose procedure, discharged the media resource and the session of having set up between described called subscriber and the ICCF.
5, method as claimed in claim 4 is characterized in that, described ICCF initiatively initiates the media resource dispose procedure, further may further comprise the steps:
Described ICCF is that MGCF sends SIP cancellation message to MGCF when sending the sip message of expression User Determined User Busy to described TAS simultaneously, discharges the session of described ICCF to the called subscriber;
Described MGCF cancels message with SIP and changes the ISUP release message into to send to Visited Mobile Switching Center be VMSC, discharges the media resource of described MGCF to VMSC;
Described VMSC sends release message to called subscriber equipment, discharges the media resource of described VMSC to called subscriber equipment.
6, the method for claim 1, it is characterized in that, called subscriber equipment sends sip message by packet-switched domain session control path to ICCF and is meant that the sip message of described called subscriber equipment is the ICCF that is routed to of CSCF by CSCF.
7, the method for claim 1 is characterized in that, described IMS territory user is as caller, and the circuit commutative field user sets up by the caller process of called process or called subscriber equipment as called calling.
8, method as claimed in claim 7, it is characterized in that, described employing caller process is set up to exhale eventually and is meant, after described ICCF receives the conversation request of calling subscriber equipment initiation, by session control path, PS territory to the called subscriber equipment request of making a call, called subscriber equipment is set up the caller process that is initiated to described ICCF by circuit domain call, sets up eventually and exhales.
As the described method of arbitrary claim in the claim 1 to 8, it is characterized in that 9, the sip message of described expression User Determined User Busy is SIP 486 message.
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| CN2007101431599A CN101102614B (en) | 2007-08-03 | 2007-08-03 | Method for implementing call forwarding on busy in IMS centrally controlled service |
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| CN2007101431599A CN101102614B (en) | 2007-08-03 | 2007-08-03 | Method for implementing call forwarding on busy in IMS centrally controlled service |
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| CN101102614B CN101102614B (en) | 2011-06-22 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010015203A1 (en) * | 2008-08-08 | 2010-02-11 | Huawei Technologies Co., Ltd. | System and method for enabiling sr-vcc with shared impu |
| WO2011015138A1 (en) * | 2009-08-07 | 2011-02-10 | 华为终端有限公司 | Method and apparatus for transmitting session information |
| WO2012041138A1 (en) * | 2010-09-27 | 2012-04-05 | 中兴通讯股份有限公司 | Method and system for final call accessing via visited ims access point |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108696832A (en) * | 2017-04-06 | 2018-10-23 | 中国移动通信有限公司研究院 | Call handling method, device and equipment, computer readable storage medium |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100571308C (en) * | 2005-09-01 | 2009-12-16 | 华为技术有限公司 | A kind of method that realizes the IP Multimedia System bridge joint |
| CN100551168C (en) * | 2006-03-20 | 2009-10-14 | 华为技术有限公司 | The method of connecting multimedia subsystem of circuit field terminal and implement device thereof |
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2007
- 2007-08-03 CN CN2007101431599A patent/CN101102614B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010015203A1 (en) * | 2008-08-08 | 2010-02-11 | Huawei Technologies Co., Ltd. | System and method for enabiling sr-vcc with shared impu |
| WO2011015138A1 (en) * | 2009-08-07 | 2011-02-10 | 华为终端有限公司 | Method and apparatus for transmitting session information |
| WO2012041138A1 (en) * | 2010-09-27 | 2012-04-05 | 中兴通讯股份有限公司 | Method and system for final call accessing via visited ims access point |
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| CN101102614B (en) | 2011-06-22 |
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Granted publication date: 20110622 Termination date: 20170803 |