CN101330638B - Method for associating session control path and bearer control path - Google Patents
Method for associating session control path and bearer control path Download PDFInfo
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Abstract
The invention discloses a method for associating a session control path and a bearer control path, which is used for realizing the effective association of the session control path and the bearer control path in the centralized service of an IP multimedia subsystem and mainly comprises the following steps: the initiating user equipment of the IP multimedia subsystem centralized service generates a call reference value for identifying the session process; the initiating user equipment sends the generated call reference value to the IP multimedia subsystem circuit domain control function through a packet switching session control path and a bearer control path respectively, and the latter associates the session control path with the bearer control path according to the call reference value. The invention represents the session by a call reference value, and ensures the effective association of the session control path and the bearing control path.
Description
Technical field
The present invention relates to network interconnection agreement (Internet Protocol; Be called for short IP) IP multimedia subsystem, IMS (IP Multimedia Core Network Subsystem; Be called for short IMS) centralized traffic (IMSCentralized Service; Be called for short ICS), relate in particular to session control path and the correlating method that carries the control path among a kind of ICS.
Background technology
IMS is a kind of IP-based network framework that is proposed by third generation partner program (3rd Generation Partnership Project is called for short 3GPP).It has made up an opening and service environment flexibly, supports multimedia application, and abundant multimedia service is provided for the user.
IMS is based on the communication network framework of IP; Irrelevant with access technology; Except being GPRS (General Packet Radio Service; Be called for short GPRS), WLAN packet access networks such as (WirelessLocal Area Network are called for short WLAN) provides outside the business, can also be global system for mobile communications (Global System for Mobile communications; Abbreviation GSM), unified mobile communcations system mobile cellular networks such as (Universal Mobile Telecommunications System are called for short UMTS) provides professional.
Mobile cellular network such as GSM, UMTS adopts circuit-switched technology, is called circuit switching (CircuitSwitched is called for short CS) territory (domain), can basic speech business be provided 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 ICS.
The IMS centralized traffic has the following advantages:
(1) IMS is that access waies such as circuit domain, packet domain provide consistent business, 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, also support the existing subscriber equipment that does not possess the ICS ability.
Fig. 1 is the professional Organization Chart of IMS centralized control, comprises following network element:
101 subscriber equipmenies (User Equipment is called for short UE)
102 Visited Mobile Switching Centers (Visited Mobile Switch Center is called for short VMSC)
103 home subscriber servers (Home Subscriber Server is called for short HSS)
104 MGCFs (Media Gateway Control Function is called for short MGCF)
105 WMGs (Media Gateway is called for short MGW)
106IMS circuit domain control function (IMS CS Control Function is called for short ICCF)
107 CSCFs (Call Session Control Function is called for short CSCF)
UE_101 process VMSC_102 establishes 3 paths to the ICCF_106 in IMS territory: session control path, carrying control path and bearer path, wherein:
The session control path if set up through the CS territory, then adopts unstructured supplementary service data (Unstructured Supplementary Service Data is called for short USSD) to carry out message transmission, and UE_101 arrives ICCF_106 through VMSC_102 and HSS_103; If set up through packet switching (PacketSwitch is called for short PS) territory, then adopt the IP transmission channel (PS Transport) in PS territory to carry out message transmission, the UE_101 session control signaling can be directly to and reaches ICCF_106;
Carry the control path, UE adopts the CS control signaling of standard to insert VMSC_102, and is linked into IMS through MGCF_104.VMSC_102 arrives MGCF_104 through integrated digital service-user part signaling (ISDNUser Part is called for short ISUP), and then adopts session initiation protocol signaling (SessionInitial Protocol is called for short SIP), through CSCF_107, arrives ICCF_106;
Bearer path, MGW_105 sets up through VMSC_102 control, is linked into IMS.
Session information is transmitted in the session control path between UE_101 and ICCF_106, transmit the carrying control messages between CS territory and the IMS territory and carry the control path through the CS control signaling and the SIP signaling of standard.At last, the session control path need be associated at ICCF_106 with carrying control path.This function just is equivalent to the sip user agent function that UE_101 sets up the IMS session.Carry the control path and also controlling the foundation of bearer path and the management of bearing resource.
Fig. 2 shows the rising of ICS subscriber equipment that carry in the session control path in the prior art scheme and exhales flow process on the PS territory, idiographic flow is following:
Step 201, ICS calling subscriber UE-A initiate an initial session to called subscriber equipment UE-B: at first UE-A is to inquiry CSCF (Interrogating CSCF; Be called for short I-CSCF)/serving CSCF (Serving CSCF; Be called for short S-CSCF) initiate a session request; Desire to set up the session control path, comprise generic resource identifier (Uniform ResourceIdentifier is called for short URI) address and the session information of UE-B in this conversation request sip message with ICCF;
Step 202, S-CSCF are routed to ICCF with the conversation request sip message that receives, and comprise URI address and the session information of UE-B in this sip message equally;
Step 203, UE-A send to carry to VMSC and set up request (SETUP) message; Carry remote subscriber agency (the Remote User Agent among the ICCF in the SETUP message; Abbreviation RUA) public service identity (Public Service Identities; PSI) number, desire is set up a CS session through the CS flow process and the ICCF of standard;
Step 204, VMSC send initial address message (Initial Address Message is called for short IAM) to MGCF, and carry RUA PSI number;
Step 205, MGCF receive and distribute the MGW media resource behind the initial address message, and create the Invite conversation request and send to I/S-CSCF, and this moment, RUA PSI number converted the SIP-URI number into by I-CSCF;
Step 206, S-CSCF give ICCF through initial filter standard or norm (iFC) with this Invite conversation request route;
Step 207, session control request and the carrying request of setting up are carried out related in ICCF and termination, and RUA initiates a session request to UE-B as B2BUA at this moment, at first sends to CSCF;
Step 208, CSCF be through the IMS session flow process of standard, and the conversation procedure of UE-A calling subscriber and UE-B called subscriber equipment is finally accomplished in the session of setting up RUA and UE-B.
In above-mentioned prior art flow process, carry control path and session control path and carry out relatedly just carrying out follow-up conversation procedure in the ICCF requirement.But when carrying foundation request is concurrent with the session control request; Carry in the request of foundation and the session control request owing to do not carry the interrelated information of carrying control path and session control path; UE-A initiates to carry and has only carried RUA PSI number when setting up request; This number is pre-configured in a UE static number, and it is related with the session control path to lean on this parameter can't in ICCF, carry the control path separately.Therefore need to propose a kind of session control path and the correlating method that carries the control path, guarantee that both carry out association.
Summary of the invention
Technical problem to be solved by this invention is to be in the centralized traffic of IP Multimedia System, to provide a kind of session control path and the correlating method that carries the control path, is used for realizing the session control path and carries the effective related of control path.
In order to solve the problems of the technologies described above, the invention provides a kind of session control path and the correlating method that carries the control path, be applied to IP Multimedia System, comprising:
(1) the initiation subscriber equipment of said IP Multimedia System centralized traffic generates the Call Reference Value of this conversation procedure of sign;
(2) said initiation subscriber equipment sends the session that carries said Call Reference Value through the session control path on the packet-switched domain to the IP Multimedia System circuit domain control function and sets up request;
(3) said initiation subscriber equipment sends the circuit domain call that carries said Call Reference Value through the control of the carrying on circuit domain path to said IP Multimedia System circuit domain control function and sets up request;
(4) said IP Multimedia System circuit domain control function is set up the Call Reference Value in the request according to Call Reference Value and said circuit domain call in the said session foundation request, and said session control path and said carrying control path are associated.
Above-mentioned correlating method, Call Reference Value described in its step (1) can described this conversation procedure of unique identification.
Above-mentioned correlating method, Call Reference Value can generate at random described in its step (1).
Above-mentioned correlating method, Call Reference Value described in its step (2) can be set up the header field of asking through said session and carry.Further, said Call Reference Value can carry through the contact head that said session is set up in the header field of asking.
Above-mentioned correlating method, Call Reference Value described in its step (2) can be set up the session description protocol parameters of asking through said session and carry.Further, said Call Reference Value can carry through in said session description protocol parameters, increasing an attribute.
Above-mentioned correlating method is initiated subscriber equipment and is initiated new session and use identical bearer path described in its step (2), then can carry said Call Reference Value.Further, above-mentioned correlating method, the said association in its step (4) also comprises described in the step (2) and to initiate subscriber equipment when initiating new session, can pass through said Call Reference Value, and circuit domain call is associated with new session on the session control path.
Above-mentioned correlating method, its said step (3) can comprise:
(31) said initiation subscriber equipment sends the carrying that carries said Call Reference Value to Visited Mobile Switching Center and sets up request, and said Call Reference Value can be carried to user profile by the user;
(32) said Visited Mobile Switching Center sends the initial address message that carries said Call Reference Value to MGCF;
(33) after said MGCF is received said initial address message, said Call Reference Value is transformed in the conversation initiating protocol message;
(34) said MGCF is created an Invite conversation request that carries said session initiation protocol, and sends to said IP Multimedia System circuit domain control function through CSCF.
Compared with prior art, the present invention comes this session is identified owing to all carry Call Reference Value in the session control path with carrying on the control path, has guaranteed the session control path and has carried the effective related of control path.
Description of drawings
Fig. 1 is the professional group-network construction sketch map of IP Multimedia System IMS centralized control;
Fig. 2 is that the rising of ICS subscriber equipment that carry on the PS territory in the session control path in the prior art exhaled schematic flow sheet;
Fig. 3 is the inventive method embodiment schematic flow sheet;
Fig. 4 is the schematic flow sheet of an application implementation example of the inventive method.
Embodiment
Below in conjunction with accompanying drawing and embodiment technical scheme of the present invention is done further to specify.
Thinking of the present invention is: carry when the ICS subscriber equipment adopts PS to carry out session control signaling; And adopt CS to carry out bearer control signalling when carrying; One of definition is public unique and at random in the request of carry setting up and session control request; Identify the Call Reference Value of this conversation procedure, carry control path and session control path like this and can carry out effective relatedly at ICCF, and carry out follow-up conversation procedure through Call Reference Value.
Fig. 3 shows the inventive method embodiment, comprises the steps:
Step 301, ICS initiated subscriber equipment before initiating the caller process, generated the Call Reference Value of unique this conversation procedure of sign at random;
Step 302, initiation subscriber equipment send session through the session control path on the PS territory to ICCF and set up request, carry the Call Reference Value that is generated in this request;
Step 303, initiation subscriber equipment send the CS setup requests through the control of the carrying on circuit domain path to ICCF, also carry the Call Reference Value that is generated in this request;
Step 304, ICCF set up the Call Reference Value in the request according to the session of PS territory, with the Call Reference Value in the setup requests of CS territory, the path is controlled in session be associated with carrying control path.
In the above-mentioned steps 301, initiate this caller process that Call Reference Value that UE generates must this UE of unique identification be initiated between this UE and ICCF.For this reason, initiating the Call Reference Value that UE generated can generate at random.
In the above-mentioned steps 302, UE can carry Call Reference Value through the header field or Session Description Protocol (Session Description Protocol the is called for short SDP) parameter of conversation request sip message.
In the above-mentioned steps 302; If this initiation UE initiates new session and uses identical bearer path from PS session control path; Then set up in the request in session and also need carry this Call Reference Value, ICCF utilizes this Call Reference Value to carry out related with the CS calling session that PS controls on the path.
In the above-mentioned steps 303; UE utilizes call setup (Setup) request message, adopts the user to carry to user profile (User to User Information is called for short UUI); Call Reference Value is transferred to VMSC; VMSC utilizes the UUI in the initial address message that Call Reference Value is sent MGCF again, and MGCF in sip message, sends the UUI information translation to ICCF again.
In the above-mentioned steps 304, ICCF will carry the request of foundation, the session control request is carried out also further carrying out follow-up calling procedure after association, the merging.
Like this; Carry same Call Reference Value in request message and the conversation request message through setting up in carrying; Make carrying control path and session control path in ICCF, carry out effective association, can realize further that the session on the PS control path is associated with the CS calling according to this Call Reference Value.
Fig. 4 shows an application implementation example of the present invention, exhales flow process for the rising of ICS subscriber equipment that carry on the PS territory in the session control path, and concrete steps are:
Before step 401, ICS initiation user equipment (UE)-A make a call, according to certain random code create-rule, generating the Call Reference Value unique, at random of this conversation procedure of sign, can be compositions such as character string and numeral; Wherein, Call Reference Value adopts at random and generates, and can prevent that other mobile phone from using identical Call Reference Value, avoids causing the confusion of conversation procedure;
Step 406, MGCF distribute the MGW media resource after receiving initial address message, and UUI is transformed in the sip message by MGCF;
Step 409, session control request and the carrying request of setting up merge at ICCF, and ICCF controls the path to session control path and carrying and carries out effective related through discerning the session control request and carrying the Call Reference Value in the request of foundation;
After UE-A and UE-B session foundation, UE-A can call out maintenance (callhold) to current sessions, and initiates the calling to third party (like UE-C); UE-A can carry out new session in PS session control path like this, and this new session at this moment is also through this Call Reference Value, and it is related to realize that session new on the PS control path and CS call out;
RUA among step 410, the ICCF initiates a session request to UE-B as B2BUA this moment, carries out follow-up conversation procedure.
On existing technical foundation, when Intra-request Concurrency is set up in session control request and carrying, do not carry the related information relevant in two request messages with this session.The inventive method is through the improvement to techniqueflow; In carrying the request of foundation, carry the Call Reference Value that UE generates; In session control request sip message, also carry identical Call Reference Value, carry control path and session control path like this and just can in ICCF, carry out effective association through public unique and Call Reference Value at random.
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 within the protection range of the appended claim of the present invention.
Claims (10)
1. session control path and the correlating method that carries the control path are applied to IP Multimedia System, it is characterized in that, comprising:
(1) the initiation subscriber equipment of said IP Multimedia System centralized traffic generates the Call Reference Value of this conversation procedure of sign;
(2) said initiation subscriber equipment sends the session that carries said Call Reference Value through the session control path on the packet-switched domain to the IP Multimedia System circuit domain control function and sets up request;
(3) said initiation subscriber equipment sends the setup requests that carries said Call Reference Value through the control of the carrying on circuit domain path to said IP Multimedia System circuit domain control function; Said Call Reference Value adopts the user in the circuit switching standard signaling to carry to user profile;
(4) said IP Multimedia System circuit domain control function is set up the Call Reference Value in the request according to Call Reference Value and said circuit domain call in the said session foundation request, and said session control path and said carrying control path are associated.
2. the method for claim 1 is characterized in that, described this conversation procedure of Call Reference Value unique identification described in the step (1).
3. the method for claim 1 is characterized in that, Call Reference Value generates at random described in the step (1).
4. the method for claim 1 is characterized in that, Call Reference Value described in the step (2) can be set up the header field of asking through said session and carry.
5. method as claimed in claim 4 is characterized in that, the contact head that said Call Reference Value is set up in the header field of asking through said session carries.
6. the method for claim 1 is characterized in that, Call Reference Value described in the step (2) can be set up the session description protocol parameters of asking through said session and carry.
7. method as claimed in claim 6 is characterized in that, said Call Reference Value carries through in said session description protocol parameters, increasing an attribute.
8. the method for claim 1 is characterized in that, initiates subscriber equipment described in the step (2) and initiates new session and use identical bearer path, then carries said Call Reference Value.
9. method as claimed in claim 8 is characterized in that, circuit domain call is through said Call Reference Value, is associated with new session on the session control path.
10. the method for claim 1 is characterized in that, said step (3) comprising:
(31) said initiation subscriber equipment sends the carrying that carries said Call Reference Value to Visited Mobile Switching Center and sets up request, and said Call Reference Value is carried to user profile by the user;
(32) said Visited Mobile Switching Center sends the initial address message that carries said Call Reference Value to MGCF;
(33) after said MGCF is received said initial address message, said Call Reference Value is transformed in the conversation initiating protocol message;
(34) said MGCF is created a said setup requests that carries said conversation initiating protocol message, and sends to said IP Multimedia System circuit domain control function through CSCF.
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| US8547969B2 (en) | 2009-03-31 | 2013-10-01 | Interdigital Patent Holdings, Inc. | Method and apparatus for providing non-packet switched service in a target radio access technology network |
| CN107317786B (en) * | 2016-04-26 | 2020-11-06 | 中国移动通信有限公司研究院 | Method, device and network element for forwarding session initiation protocol message |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1515123A (en) * | 2001-04-17 | 2004-07-21 | �����籨�绰����ͨѶ��˾ | Binding information for IP media flows |
| CN1794829A (en) * | 2005-03-25 | 2006-06-28 | 华为技术有限公司 | Method of establishing circuit exchange network to IMS network calling route |
| CN1882172A (en) * | 2005-07-29 | 2006-12-20 | 华为技术有限公司 | User registration and conversation switching method in IP multimedia terminal and system |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1515123A (en) * | 2001-04-17 | 2004-07-21 | �����籨�绰����ͨѶ��˾ | Binding information for IP media flows |
| CN1794829A (en) * | 2005-03-25 | 2006-06-28 | 华为技术有限公司 | Method of establishing circuit exchange network to IMS network calling route |
| CN1882172A (en) * | 2005-07-29 | 2006-12-20 | 华为技术有限公司 | User registration and conversation switching method in IP multimedia terminal and system |
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Effective date of registration: 20180704 Address after: California, USA Patentee after: Global innovation polymerization LLC Address before: 518057 Department of law, Zhongxing building, South hi tech Industrial Park, Nanshan District hi tech Industrial Park, Guangdong, Shenzhen Patentee before: ZTE Corp. |
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Granted publication date: 20120523 |