CN101330640A - Method for implementing call retention business of IP multimedia subsystem centralized business - Google Patents

Method for implementing call retention business of IP multimedia subsystem centralized business Download PDF

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Publication number
CN101330640A
CN101330640A CNA200710111520XA CN200710111520A CN101330640A CN 101330640 A CN101330640 A CN 101330640A CN A200710111520X A CNA200710111520X A CN A200710111520XA CN 200710111520 A CN200710111520 A CN 200710111520A CN 101330640 A CN101330640 A CN 101330640A
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mrfp
medium
mgw
iccf
request
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CNA200710111520XA
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CN101330640B (en
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郝振武
沈岷
强宇红
汪军
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ZTE Corp
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ZTE Corp
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Priority to PCT/CN2007/003573 priority patent/WO2008154780A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/16—Communication-related supplementary services, e.g. call-transfer or call-hold
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/1066—Session management
    • H04L65/1096—Supplementary features, e.g. call forwarding or call holding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/428—Arrangements for placing incoming calls on hold
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M7/00—Arrangements for interconnection between switching centres
    • H04M7/12—Arrangements for interconnection between switching centres for working between exchanges having different types of switching equipment, e.g. power-driven and step by step or decimal and non-decimal
    • H04M7/1205—Arrangements for interconnection between switching centres for working between exchanges having different types of switching equipment, e.g. power-driven and step by step or decimal and non-decimal where the types of switching equipement comprises PSTN/ISDN equipment and switching equipment of networks other than PSTN/ISDN, e.g. Internet Protocol networks
    • H04M7/1225—Details of core network interconnection arrangements
    • H04M7/123—Details of core network interconnection arrangements where the packet-switched network is an Internet Protocol Multimedia System-type network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M7/00—Arrangements for interconnection between switching centres
    • H04M7/12—Arrangements for interconnection between switching centres for working between exchanges having different types of switching equipment, e.g. power-driven and step by step or decimal and non-decimal
    • H04M7/1205—Arrangements for interconnection between switching centres for working between exchanges having different types of switching equipment, e.g. power-driven and step by step or decimal and non-decimal where the types of switching equipement comprises PSTN/ISDN equipment and switching equipment of networks other than PSTN/ISDN, e.g. Internet Protocol networks
    • H04M7/1225—Details of core network interconnection arrangements
    • H04M7/1235—Details of core network interconnection arrangements where one of the core networks is a wireless network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M7/00—Arrangements for interconnection between switching centres
    • H04M7/12—Arrangements for interconnection between switching centres for working between exchanges having different types of switching equipment, e.g. power-driven and step by step or decimal and non-decimal
    • H04M7/1205—Arrangements for interconnection between switching centres for working between exchanges having different types of switching equipment, e.g. power-driven and step by step or decimal and non-decimal where the types of switching equipement comprises PSTN/ISDN equipment and switching equipment of networks other than PSTN/ISDN, e.g. Internet Protocol networks
    • H04M7/126—Interworking of session control protocols
    • H04M7/127—Interworking of session control protocols where the session control protocols comprise SIP and SS7
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10—Architectures or entities
    • H04L65/1016—IP multimedia subsystem [IMS]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/04—Network layer protocols, e.g. mobile IP [Internet Protocol]

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Business, Economics & Management (AREA)
  • General Business, Economics & Management (AREA)
  • Telephonic Communication Services (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses a method for realizing a call hold service in the IP multimedia subsystem centralized service. When the call hold service is requested by user equipment ICS_UE with IP multimedia subsystem (IMS) centralized services, the call hold request is transmitted to a supplementary service server by the IMS circuit domain control function ICCF, the supplementary service server controls the call hold service and the media face keep alive of the held user is achieved simultaneously. The method realizes the service requirement for the call hold service in the IP multimedia subsystem centralized service, reduces the difficulty of service fulfilment and interactive complexity, and avoids the repetitive occupancy of media resources.

Description

A kind of implementation method of IP Multimedia System centralized traffic call hold service
Technical field
The present invention relates to the communications field, relate more specifically to the implementation method of call hold service in a kind of IP Multimedia System centralized traffic.
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, comprises following network element:
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)
The 106IMS 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 telephone 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.
Wherein session information is transmitted in the session control path between UE 101 and ICCF 106 dual mode,
(1) CS session control path: be carried on the CS territory, adopt unstructured supplementary service data (Unstructured Supplementary Service Data is called for short USSD), this path is through VMSC102 and HSS 103;
(2) PS session control path: be carried on the PS territory, adopt session initiation protocol (SessionInitial Protocol is called for short SIP) agreement, this path is through the CSCF107 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 106 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.
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.Session control path and carrying control path are converged at ICCF 106, ICCF 106 serves as the IMS user agent function, replaces subscriber equipment to carry out and inserts IMS, constitutes the far-end calling branch, TAS 108 application servers such as grade are arranged, for ICS_UE provides IMS business in this branch.Wherein 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.
Calling maintenance (Call Hold) business is a kind of supplementary service in the communication system: when two users (user A and user B) set up conversation in communication system after, one of them user (is example with user A) can hold the line, temporary transient request remote subscriber (user B) keeps current talking to connect, but does not carry out voice transfer.When hold mode, UE-A can ask UE-B to change talking state again over to from hold mode, and this is called call recovery (Call Resume).Call hold service comprises calling out and keeps and two processes of call recovery.
On calling out on the basis that keeps, user A can dial or answer third party (user C) again, converses between foundation and the user C, and can switch between the calling of calling that keeps attitude and conversation state.
In telecommunication service, usually above-mentioned calling is kept process, call recovery process and on the basis of calling out maintenance, dials or answer third party's telephone service being referred to as call hold service.In this article, do not have specified otherwise, call hold service refers to the business of above-mentioned general designation.
ICS must support call keep professional as a kind of telecommunication system.
The implementation method that calling keeps in ICS as shown in Figure 2.
UE-A is the UE that possesses the ICS ability, by equipment such as VMSC, ICCF, MGCF, CSCF set up and distance terminal UE-B between conversation, and set up two-way medium by VMSC, MGW and UE-B and be connected.When user A wishes to start the calling maintenance, may further comprise the steps:
201, UE-A sends to call out to ICCF by the session control path and keeps request.
202, ICCF sends the medium update inquiry information to UE-B, and request UE-B enters hold mode.
203, after the UE-B change medium local media resource, return medium to ICCF and upgrade success response.
204, in step 202, ICCF sends the medium updating message to MGCF, and indication MGCF control MGW enters unactivated state, does not receive and does not also send Media Stream.
205, behind the MGCF control MGW change media resource, return medium to ICCF and upgrade success response.
At this moment, UE-A and UE-B enter the session hold mode, and the Media Stream between MGW and the UE-B interrupts.
Above-mentioned Media Stream adopts RTP (real-time transport protocol; be called for short RTP) transmit; adopt RTCP Real-time Transport Control Protocol (real-time transport control protocol simultaneously; be called for short RTCP) control its transmission, monitor, synchronously, the link keep-alive.When according to business need, temporarily interrupt media delivery, promptly do not send the RTP packet, still need transmit the RTCP packet this moment on link, keep link to be in the state of activation.
According to above-mentioned requirements, after UE-A and UE-B enter the session hold mode, no longer transmit the RTP bag, but still transmit the RTCP bag, keep link not interrupt, make in the drawings to dot.
Calling out hold mode, when UE-A need call out third party user UE-C, may further comprise the steps:
206, UE-A sends setup requests by the session control path to ICCF, calling party C.
207, ICCF sends to UE-C and invites request, carries the media information of MGW in the request, and this media information is exactly the media information of the employed MGW of session of UE-A and UE-B conversation.
208, UE-C returns the ring response.
209, ICCF returns the ring response by the session control path to UE-A.
210, the UE-C off-hook, UE-C returns success response.
211, ICCF returns connection response by the session control path to UE-A.
212, ICCF sends the success response acknowledge message to UE-C.
Above step 206～212nd, call establishment, processes such as the media negotiation in the middle of also comprising therebetween, resource reservation in order to simplify, are not described in the drawings.
After finishing above-mentioned steps, can prepare the medium between UE-A and the UE-C are connected, the medium face connection that is about to MGW moves on on the UE-C from UE-B, but the medium face that will cause being held user UE-B will lose connection, MGW can't return the RTCP packet to UE-B again, UE-B may think that medium connect and lose, and discharges maintained session.
In order to address the above problem; existing mode is utilized media resource controlled function (Media ResourceFunction Control; be called for short MRFC)/media resource processor controls (Media ResourceFunction Processor; abbreviation MRFP) provides media resource; with linked to each other by the UE-B of keep-alive, the medium face keep-alive information of UE-B is provided.Above-mentioned MRFC and MRFP general designation media resource control (Media Resource Function, be called for short MRF), be sometimes referred to as media server, functions such as media conversion, media play are provided for IMS user, wherein MRFC is according to the requirement of (keeping playback as supplementary services call) of other business functions, and control MRFP provides corresponding medium to handle service (as playback).
Concrete steps are as follows:
213, ICCF sends to MRFC/MRFP and invites request, wherein carries the media information of UE-B, and request MRFC distributes and the corresponding media resource of UE-B media information.
214, the MRFC/MRFP Resources allocation, and return success response to ICCF.
215, ICCF sends the success response acknowledge message to MRFC/MRFP.
216, ICCF sends medium update request, the media resource information of wherein carrying the MRFP that obtains from step 213～215 processes to UE-B.
217, UE-B upgrades local media resource, set up with MRFP between medium be connected, and return success response to ICCF.
By step 213～217, ICCF applies for media resource to MRFC/MRFP, and sets up UE-B and be connected with the medium of MRFP, realizes the requirement to the medium face keep-alive that is held UE-B.
218, ICCF sends the medium update request to MGCF/MGW, carries the media information of UE-C in the request, and indication activation media resource, enters normal transmission accepting state.
219, MGCF control MGW upgrades media resource, sets up to be connected with the medium of UE-C.
220, in step 218, ICCF sends the medium update request to UE-C, and indication activates media resource, enters normal transmission accepting state.
221, UE-C upgrades local media resource, sets up to be connected with the medium of MGW.
By step 218～221, set up UE-C and be connected, thereby realized conversation between UE-A and the UE-C with medium between the MGW.
But there is following problem in present this implementation:
Call hold service is a signing service, provide by special supplementary business server (TAS) at IMS, when user's request call keeps professional, can be according to the user signatory, whether decision allows the user to use this business, when the demand of playing maintenance sound or maintenance medium was arranged, control MRFC/MRFP play the maintenance sound for the user simultaneously.
In existing implementation method, when calling out third party user, realize being held the keep-alive of user media face in order to be implemented in, adopted the method that keepalive feature is provided by ICCF control MRFC/MRFP.Play the demand that keeps sound if user's this moment has, two kinds of implementations are arranged, the one, by the MRFC/MRFP broadcast of ICCF control, the one, play by special supplementary business server control MRFC/MRFP.Before a kind of mode, require ICCF must know the CAMEL-Subscription-Information of user's supplementary service, need with supplementary business server alternately simultaneously, make supplementary business server not carry out playback operation, increase business realizing and mutual complexity; A kind of mode in back, the resource that ICCF and supplementary business server SEPARATE APPLICATION MGCF/media gateway controlling is handled causes the wasting of resources.
In addition according to the imagination of IMS centralized traffic, be that ICCF replaces UE to insert IMS, the business that makes the user can use IMS to provide, be that ICCF itself does not provide concrete business, concrete professional by other entities in the IMS network, provide as application server, and these business can be by from the CS territory, or the different access waies in PS territory are shared.Therefore present implementation ICCF has participated in professional realization, and the original intention that has increased the complexity of ICCF and IMS centralized traffic is inconsistent a bit.
In sum, present ICS calls out the maintenance method increases business realizing difficulty and mutual complexity, or causes and take too much media resource.
Summary of the invention
The technical problem to be solved in the present invention provides and calls out the implementation method that keeps in a kind of IP Multimedia System centralized control business, realize the business demand of call hold service, reduce business realizing difficulty and mutual complexity, and avoid media resource repeat take.
For addressing the above problem; the implementation method of IP Multimedia System centralized traffic call hold service provided by the invention; possessing IP Multimedia System is that the subscriber equipment ICS_UE request call of IMS centralized traffic ability is when keeping professional; IMS circuit domain control function ICCF sends to call out and keeps asking supplementary business server; supplementary business server provides the control of call hold service, realizes being held user's medium face keep-alive simultaneously.
Further, implementation method provided by the invention can also have following characteristics:
This method is further divided into following steps:
(a) subscriber equipment ICS_UE and other users who possesses IMS centralized traffic ability set up conversation, described ICS_UE sends to call out to IMS circuit domain control function ICCF and keeps request, ICCF receives that the back sends the medium update request to remote subscriber, the supplementary business server of this request in far-end calling branch session path;
(b) after described supplementary business server is received described medium update request; to media resource controlled function MRFC and media resource processor controls MRFP application media resource; send the medium update request to remote subscriber then; the control remote subscriber is set up medium with MRFP and is connected, and is held the user by MRFP to far-end and plays the maintenance sound or send medium face keep-alive information.
Further, implementation method provided by the invention can also have following characteristics:
Step (b) also comprises step (c) afterwards: after calling keeps successfully, if ICS_UE calls out third party user by the session control path, described ICCF sets up request to third party user's initiation session, carry the media resource information of media gateway MGW in the request, being connected between third party user and the MGW set up in request, and then realize that ICS_UE is connected with medium between the third party user, ICCF also needs to send the medium update request to MGCF MGCF simultaneously, and indication MGCF control MGW enters state of activation.
Further, implementation method provided by the invention can also have following characteristics:
Step (b) is further divided into following steps:
303, after described supplementary business server receives the medium update request, find the signatory call hold service of user, then send the invitation request to MRFC and MRFP, apply for playing the media resource that keeps sound into remote subscriber;
304, MRFC and MRFP Resources allocation, and return success response to supplementary business server;
305, supplementary business server sends medium update request, the media resource information of wherein carrying the MRFP that obtains in step 303～304 processes to remote subscriber;
306, after the remote subscriber change medium local media resource, set up with MRFP between medium is connected, and return medium renewal success response to supplementary business server;
307, supplementary business server returns medium to ICCF and upgrades corresponding success response.
Further, implementation method provided by the invention can also have following characteristics:
ICCF calls out when keeping request sending to remote subscriber in the step (a), needs also simultaneously to send to MGCF that medium upgrade or heavily invite request, and the media resource of indication MGCF control MGW enters non-activation or transmit status only.
Further, implementation method provided by the invention can also have following characteristics:
MGW needs the keep-alive information of medium face described in the step (a); then described supplementary business server or ICCF are to MRFC and MRFP application media resource; and to MGCF and MGW transmission medium update request; MGCF control MGW sets up medium with MRFP and is connected media stream or medium face keep-alive information between MGW and MRFP.
Further, implementation method provided by the invention can also have following characteristics:
Step (b) if in remote user equipment be in unactivated state, still need to send medium face keep-alive information between described MRFP and the remote user equipment, the medium that guarantee maintained remote subscriber connect and to be in active state.
Further, implementation method provided by the invention can also have following characteristics:
The pairing resource of MGW media resource information that the described ICCF of step (c) carries in third party's Client-initiated session request of setting up is ICS_UE employed resource when calling out first user.
Further, implementation method provided by the invention can also have following characteristics:
Supplementary business server or ICCF described in the step (a) are to MRFC and MRFP application media resource, and to MGCF and MGW transmission medium update request, MGCF control MGW sets up medium with MRFP and is connected media stream or medium face keep-alive information between MGW and MRFP;
After setting up being connected between MGW and the third party user in the step (c), described supplementary business server does not perhaps temporarily discharge the MRFP resource being held that session recovers or discharging the resource of MRFP when being released, and finishes the back and discharges the MRFP resource etc. whole session.
Further, implementation method provided by the invention can also have following characteristics:
Supplementary business server or ICCF described in the step (a) are to MRFC and MRFP application media resource, and to MGCF and MGW transmission medium update request, MGCF control MGW sets up medium with MRFP and is connected media stream or medium face keep-alive information between MGW and MRFP;
After setting up being connected between MGW and the third party user in the step (c), described ICCF request discharges the resource of MRFP, does not perhaps temporarily discharge the MRFP resource, finishes the back and discharges the MRFP resource etc. whole session.
Further, implementation method provided by the invention can also have following characteristics:
When being connected between described MGW and the MRFP set up in the control of described supplementary business server, may further comprise the steps:
310, supplementary business server sends the invitation request to MRFC and MRFP, carries the media information of MGW, the application media resource;
311, MRFC and MRFP Resources allocation, and return success response to supplementary business server;
312, supplementary business server sends the medium update request to ICCF, carries the media information of the MRFP that step 311～312 obtain in the request;
313, ICCF is to the medium update request of MGCF and MGW forwarding step 312;
314, behind the MGCF control MGW change media resource, return medium and upgrade success response;
315, ICCF returns medium to supplementary business server and upgrades success response.
Adopt implementation method of the present invention; keep professional by the supplementary business server controlling call; and provide and play and keep sound or send medium face keep-alive information being held the user; and ICCF just asks to control MGCF/MGW according to the user; thereby make ICCF not need to control MRFC/MRFP; supplementary business server can have been simplified the function of ICCF simultaneously simultaneously for different access waies provide service.
Description of drawings
The Organization Chart of the IMS centralized control business that Fig. 1 is;
Fig. 2 is existing ICS call hold service flow chart;
Fig. 3 is the ICS call hold service flow chart of one embodiment of the present of invention.
Embodiment
In actual applications, call hold service is all controlled by supplementary business server and is provided, and generally all need play the maintenance sound for being held the user by network simultaneously, and when playing the maintenance sound, has promptly realized the connection of medium and the keep-alive of link.
Based on above-mentioned consideration; the implementation method that the calling of IP Multimedia System centralized traffic provided by the invention keeps; the control of call hold service is provided by supplementary business server; simultaneously for the keep-alive that is held user's playback or medium face connects, to guarantee that being held the user can not discharged unusually because the medium face does not connect.
The realization of call hold service of the present invention may further comprise the steps generally:
(a) possess subscriber equipment ICS_UE and other users that IP Multimedia System is an IMS centralized traffic ability and set up conversation, described ICS_UE sends to call out to IMS circuit domain control function ICCF and keeps request, ICCF receives that the back sends the medium update request to remote subscriber, the supplementary business server of this request in the session path of far-end calling branch;
(b) after described supplementary business server is received described medium update request, to media resource controlled function MRFC and media resource processor controls MRFP application media resource, send the medium update request to remote subscriber then, the control remote subscriber is set up medium with MRFP and is connected, and is held the user by MRFP to far-end and plays the maintenance sound or send medium face keep-alive information;
(c) after calling keeps successfully, if ICS_UE calls out third party user by the session control path, described ICCF sets up request to third party user's initiation session, being connected between third party user and the media gateway MGW set up in request, and then realizes that ICS_UE is connected with medium between the third party user.
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
Fig. 3 is the realization flow of one embodiment of the present of invention, wherein UE-A is the UE that possesses the ICS ability, by equipment such as VMSC, ICCF, MGCF, CSCF, TAS set up and distance terminal UE-B between conversation, TAS is on the session path of far-end calling branch all the time, and sets up two-way medium by VMSC, MGW and UE-B and be connected.
The call hold service if user A has contracted, and when need starting call hold service, the realization of this call hold service may further comprise the steps:
301, UE-A sends to call out to ICCF by the session control path and keeps request;
302, ICCF sends the medium update inquiry information by TAS to UE-B, and request UE-B enters hold mode;
303, after TAS receives the medium update request of call hold service, find the signatory call hold service of user, then send and invite request to MRFC/MRFP, wherein carry the media information of UE-B, apply for playing the media resource that keeps sound into UE-B;
304, the MRFC/MRFP Resources allocation, and return success response to TAS;
305, TAS sends medium update request, the media resource information of wherein carrying the MRFP that obtains in step 303～304 processes to UE-B;
306, after the UE-B change medium local media resource, set up with MRFP between medium is connected, and return medium renewal success response to TAS;
307, TAS returns medium to ICCF and upgrades (step 302) corresponding success response;
308, in step 302, ICCF sends the medium updating message to MGCF, and indication MGCF control MGW enters unactivated state, does not receive and does not also send Media Stream;
309, behind the MGCF control MGW change media resource, return medium to ICCF and upgrade success response.
Wherein in 308 steps, ICCF can also send the medium updating message to MGCF, and indication MGCF control MGW enters a transmit status, promptly only sends not receive.
After finishing above-mentioned steps, UE-B enters the session hold mode, and MRFP plays to UE-B and keeps sound or medium face keep-alive information.If do not need to keep sound this moment, promptly there is not the RTP packet, MRFP and UE-B still need to send the RTCP packet, carry out medium and connect keep-alive.
This moment, MGW was in unactivated state at the media resource of IMS side, did not send also not receiving media stream, also was not connected with the medium face of miscellaneous equipment.If MGW also needs the keep-alive of medium face, then need apply for media resource to MRFC/MRFP by TAS or ICCF this moment, to set up medium with MGW and be connected, and transmit the RTCP packet, the medium of keeping MGW connect.Its detailed process is seen the step in the frame of broken lines:
310, TAS sends to MRFC/MRFP and invites request, carries the media information of MGW, the application media resource.
This step can be carried out in step 306 back, also can carry out in step 303, if carry out in step 303, does not then need step 308～309.
311, the MRFC/MRFP Resources allocation, and return success response to TAS.
312, TAS sends the medium update request to ICCF, carries the media information of the MRFP that step 311～312 obtain in the request.
313, ICCF is to the medium update request of MGCF/MGW forwarding step 312.
314, behind the MGCF control MGW change media resource, return medium and upgrade success response.
315, ICCF returns medium to TAS and upgrades success response.
Through step 310～315, MGW set up with MRFP between medium is connected, thereby realization is to the keep-alive requirement of MGW resource.
This example has only been described the situation of TAS application media resource, if ICCF carries out said process, then by ICCF directly after MRFC/MRFP application resource, send the medium update request to MGCF/MGW, the medium of setting up between MGW and the MRFP connect.
Calling out under the hold mode, when UE-A need call out third party user UE-C, may further comprise the steps:
316, UE-A sends setup requests by the session control path to ICCF, calls out third party user C;
317, ICCF sends to UE-C and invites request, carries the media information of MGW in the request, and this media information is exactly the media information of the employed MGW of session between UE-A and the UE-B.This message can be passed through TAS;
318, TAS sends the request of inviting to UE-C, and session is set up in request;
319, UE-C begins ring, and returns the ring response to TAS;
320, TAS transmits the ring response to ICCF;
321, ICCF returns the ring response by the session control path to UE-A;
322, user C off-hook, UE-C returns success response to TAS;
323, TAS transmits success response to ICCF;
324, ICCF returns success response by the session control path to UE-A;
325, ICCF sends the success response acknowledge message to TAS;
326, TAS transmits the success response acknowledge message to UE-C;
327, ICCF sends the medium update request to MGCF, carries the media information of UE-C in the request, and indication MGCF control MGW enters state of activation.
328, MGCF control MGW enters state of activation, after UE-C sets up medium and is connected, returns success response to ICCF.
Between step 318～322, may exist and UE-C between media negotiation, the resource reservation process in order to simplify, is described in the drawings.By this negotiations process, determine the media formats of the employing between UE-C and the MGW.The media information of the UE-C that carries in the step 327 obtains by this process.
Step 327 in addition, 328 also can carry out after media negotiation, resource reservation success, if when like this can third party user having personalized the tinkle of bells professional, ICS_UE can hear the other side's ring-back tone.
After finishing above-mentioned steps 316-328, the medium between UE-A and the UE-C are connected (through VMSC, MGW), and the medium face that is about to MGW is connected on the UE-C, has realized the conversation between UE-A and the UE-C.
If MGW also needs the keep-alive of medium face; promptly carried out step 310～315; so behind completing steps 316～322; the medium face of MGW connects will move on to UE-C from MRFP; when perhaps the session of ICS_UE and UE-B recovered (media resource of MGW reconnects to UE-B) or end, the TAS request discharged the resource of MRFP.Concrete steps are as follows:
329, TAS sends the request of release to MRFC/MRFP.
330, MRFC discharges related resource, and returns success response to TAS.
In addition,, therefore can when recovering, temporarily not discharge the MRFP resource yet, make it be in unactivated state because the user may re-use the maintenance function, but release MRFP resource behind the conversation end of ICS_UE and UE-B by the time.
If this resource is by ICCF application, when calling out medium that third party user causes MGW, ICS connects when MRFP moves on to remote user equipment, and the ICCF request discharges the MRFP resource, and its dispose procedure and TAS dispose procedure are similar.
In addition,, therefore also can connect when MRFP moves on to remote user equipment, temporarily not discharge the MRFP resource, make it be in unactivated state, but whole session finishes the back and discharges the MRFP resource by the time at the medium of MGW because the user may re-use the maintenance function.
From above-mentioned flow process as can be seen; take method of the present invention; realized the operation flow of ICS call hold service; owing to used call hold service player function by supplementary business server; realized far-end is held user's the keepalive feature of medium face under hold mode; thereby having reduced the requirement of ICCF operation MRFC/MRFP, is the requirement that different access way users provide uniform services by supplementary business server simultaneously.
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 (11)

1, a kind of implementation method of IP Multimedia System centralized traffic call hold service; it is characterized in that; possessing IP Multimedia System is that the subscriber equipment ICS_UE request call of IMS centralized traffic ability is when keeping professional; IMS circuit domain control function ICCF sends to call out and keeps asking supplementary business server; supplementary business server provides the control of call hold service, realizes being held user's medium face keep-alive simultaneously.
2, implementation method as claimed in claim 1 is characterized in that, this method is further divided into following steps:
(a) subscriber equipment ICS_UE and other users who possesses IMS centralized traffic ability set up conversation, described ICS_UE sends to call out to IMS circuit domain control function ICCF and keeps request, ICCF receives that the back sends the medium update request to remote subscriber, the supplementary business server of this request in far-end calling branch session path;
(b) after described supplementary business server is received described medium update request; to media resource controlled function MRFC and media resource processor controls MRFP application media resource; send the medium update request to remote subscriber then; the control remote subscriber is set up medium with MRFP and is connected, and is held the user by MRFP to far-end and plays the maintenance sound or send medium face keep-alive information.
3, implementation method as claimed in claim 2 is characterized in that:
Step (b) also comprises step (c) afterwards: after calling keeps successfully, if ICS_UE calls out third party user by the session control path, described ICCF sets up request to third party user's initiation session, carry the media resource information of media gateway MGW in the request, being connected between third party user and the MGW set up in request, and then realize that ICS_UE is connected with medium between the third party user, ICCF also needs to send the medium update request to MGCF MGCF simultaneously, and indication MGCF control MGW enters state of activation.
4, implementation method as claimed in claim 2 is characterized in that:
Step (b) is further divided into following steps:
303, after described supplementary business server receives the medium update request, find the signatory call hold service of user, then send the invitation request to MRFC and MRFP, apply for playing the media resource that keeps sound into remote subscriber;
304, MRFC and MRFP Resources allocation, and return success response to supplementary business server;
305, supplementary business server sends medium update request, the media resource information of wherein carrying the MRFP that obtains in step 303～304 processes to remote subscriber;
306, after the remote subscriber change medium local media resource, set up with MRFP between medium is connected, and return medium renewal success response to supplementary business server;
307, supplementary business server returns medium to ICCF and upgrades corresponding success response.
5, implementation method as claimed in claim 2 is characterized in that:
ICCF calls out when keeping request sending to remote subscriber in the step (a), needs also simultaneously to send to MGCF that medium upgrade or heavily invite request, and the media resource of indication MGCF control MGW enters non-activation or transmit status only.
6, implementation method as claimed in claim 2 is characterized in that:
MGW needs the keep-alive information of medium face described in the step (a); then described supplementary business server or ICCF are to MRFC and MRFP application media resource; and to MGCF and MGW transmission medium update request; MGCF control MGW sets up medium with MRFP and is connected media stream or medium face keep-alive information between MGW and MRFP.
7, implementation method as claimed in claim 2 is characterized in that:
Step (b) if in remote user equipment be in unactivated state, still need to send medium face keep-alive information between described MRFP and the remote user equipment, the medium that guarantee maintained remote subscriber connect and to be in active state.
8, implementation method as claimed in claim 3 is characterized in that:
The pairing resource of MGW media resource information that the described ICCF of step (c) carries in third party's Client-initiated session request of setting up is ICS_UE employed resource when calling out first user.
9, implementation method as claimed in claim 3 is characterized in that:
Supplementary business server or ICCF described in the step (a) are to MRFC and MRFP application media resource, and to MGCF and MGW transmission medium update request, MGCF control MGW sets up medium with MRFP and is connected media stream or medium face keep-alive information between MGW and MRFP;
After setting up being connected between MGW and the third party user in the step (c), described supplementary business server does not perhaps temporarily discharge the MRFP resource being held that session recovers or discharging the resource of MRFP when being released, and finishes the back and discharges the MRFP resource etc. whole session.
10, implementation method as claimed in claim 3 is characterized in that:
Supplementary business server or ICCF described in the step (a) are to MRFC and MRFP application media resource, and to MGCF and MGW transmission medium update request, MGCF control MGW sets up medium with MRFP and is connected media stream or medium face keep-alive information between MGW and MRFP;
After setting up being connected between MGW and the third party user in the step (c), described ICCF request discharges the resource of MRFP, does not perhaps temporarily discharge the MRFP resource, finishes the back and discharges the MRFP resource etc. whole session.
11, implementation method as claimed in claim 5 is characterized in that, when being connected between described MGW and the MRFP set up in the control of described supplementary business server, may further comprise the steps:
310, supplementary business server sends the invitation request to MRFC and MRFP, carries the media information of MGW, the application media resource;
311, MRFC and MRFP Resources allocation, and return success response to supplementary business server;
312, supplementary business server sends the medium update request to ICCF, carries the media information of the MRFP that step 311～312 obtain in the request;
313, ICCF is to the medium update request of MGCF and MGW forwarding step 312;
314, behind the MGCF control MGW change media resource, return medium and upgrade success response;
315, ICCF returns medium to supplementary business server and upgrades success response.
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PCT/CN2007/003573 WO2008154780A1 (en) 2007-06-19 2007-12-13 Method for implementing call hold service of ip multimedia subsystem centralized service

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Cited By (2)

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CN108243461A (en) * 2016-12-26 2018-07-03 联芯科技有限公司 The method of terminal call switching
CN108900723A (en) * 2018-07-17 2018-11-27 中国联合网络通信集团有限公司 Call break-in method, call break-in equipment and phone system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020122401A1 (en) * 2001-03-02 2002-09-05 Zeng-Jun Xiang System and method in a wireless telecommunication network for placing a voice call on hold and conducting a data session
CN100393037C (en) * 2003-11-10 2008-06-04 中兴通讯股份有限公司 Method for implementing multi-party conference service in communication network with separated bearing and controlling
US7881287B2 (en) * 2004-07-30 2011-02-01 Telefonaktiebolaget Lm Ericsson (Publ) Method and device for session control in hybrid telecommunications network
CN1761274B (en) * 2004-10-15 2011-06-01 华为技术有限公司 Method for handling call holding

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Publication number Priority date Publication date Assignee Title
CN108243461A (en) * 2016-12-26 2018-07-03 联芯科技有限公司 The method of terminal call switching
CN108243461B (en) * 2016-12-26 2021-01-29 辰芯科技有限公司 Method for switching terminal call
CN108900723A (en) * 2018-07-17 2018-11-27 中国联合网络通信集团有限公司 Call break-in method, call break-in equipment and phone system
CN108900723B (en) * 2018-07-17 2021-03-19 中国联合网络通信集团有限公司 Forced insertion calling method, forced insertion calling equipment and communication system

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