CN100589640C - A method for sending service status of voice call continuous service - Google Patents

A method for sending service status of voice call continuous service Download PDF

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Publication number
CN100589640C
CN100589640C CN200610093619A CN200610093619A CN100589640C CN 100589640 C CN100589640 C CN 100589640C CN 200610093619 A CN200610093619 A CN 200610093619A CN 200610093619 A CN200610093619 A CN 200610093619A CN 100589640 C CN100589640 C CN 100589640C
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vcc
state information
call
service
message
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CN101087473A (en
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郝振武
汪军
李树军
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ZTE Corp
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ZTE Corp
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Priority to CN200610093619A priority Critical patent/CN100589640C/en
Priority to PCT/CN2006/003789 priority patent/WO2008000121A1/en
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    • 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
    • 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
    • H04L65/1083—In-session procedures
    • H04L65/1095—Inter-network session transfer or sharing
    • 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
    • H04L65/40—Support for services or applications
    • H04L65/401—Support for services or applications wherein the services involve a main real-time session and one or more additional parallel real-time or time sensitive sessions, e.g. white board sharing or spawning of a subconference

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

Abstract

A method of transmitting operation state of voice calling continuity operation VCC is applied in IMS system, the method includes following steps: the VCC application server receives VCC calling building request, then adds VCC operation state information to the calling building request message, and the message is sent to service calling conversation control function S-CSCF which serves for VCC user; the S-CSCF receives the calling building request message, executes operation logic control based on original filter rule, sends calling building request message which includes VCC operation state information to network entity in conversation path; said network entity receives the calling building request message, obtains VCC operation state information, and process as corresponding operation logical. The invention is applied to transfer operation state of VCC conversation between network entities for operation logical control.

Description

A kind of method that transmits the service condition of voice call continuity service
Technical field
The present invention relates to IP Multimedia System (IP Multimedia Core Network Subsystem, IMS) voice call continuity service (Voice Call Continuity, VCC), relate in particular to the method for the service condition that transmits the IP Multimedia System voice call continuity service.
Background technology
Utilize IP Multimedia System (IP Multimedia Core Network Subsystem, IMS) technology, can (Wireless Local Area Network WLAN) waits on the packet network VoIP (Voice over Internet Protocol) is provided business in WLAN (wireless local area network).Utilize this technology, the most of business on the circuit domain (Circuit SwitchedDomain) such as GSM can be provided to the user in the area that has wireless coverages such as WLAN.
(Voice Call Continuity, VCC) business can realize the voice communication of CS territory and based on the seamless switching of IMS framework WLAN territory voice communication, guarantee the continuity of voice call voice call continuity service.
The VCC business has following benefit:
(1) a part of voice call transfer is covered to WLAN on, alleviate the anxiety of GSM/UMTS (Global System for Mobile Communications/UniversalMobile Territory System) Radio Resource in the WLAN coverage territory;
(2) provide the multiple business pattern, increase professional income;
(3), adopt the IMS framework that fused business can be provided for wired VoIP operator.
In order to realize the VCC business, in the IMS territory, introduce VCC AS (Application Server, application server), realize the centralized control of VCC business, finish the audio call of VCC user terminal and set up process, and the switching between control CS territory and the IMS calling.
VCC AS finishes the foundation and the switching controls of basic call, and based on speech business on other business, as supplementary service, prepayment service etc., then realize by other application servers.In the ordinary course of things, other business do not need to know that the VCC user terminal still is to carry out voice communication from the CS territory from the IMS territory, but some service needed is obtained the state of VCC session, comprise that session is VCC session or common session (CS calls out or IMS calls out), user terminal present located domain information, and other information relevant with access.
Example 1: prepayment service
The resource shared from CS territory and WLAN access is different, the also corresponding difference of conversation rate, different with traditional payment system, in the call process, user terminal may switch between two kinds of different access waies, payment system must be adjusted rate in real time according to the difference of user mode access, guarantees the accuracy of chargeing.
Example 2:IMS message (IMS Messaging) business
In IMS, define instant message (Immediate Messaging) and two kinds of message of conversation-based message (Session-based Messaging).When not having the IMS session between the communicating pair, can use instant messaging, when having the IMS session between the both sides, can on the basis of existing session, set up end-to-end connection, realize the message transmission.
As a VCC user during, when needs and other users carry out message communicating, may there be following situation in the convention business of using the conference applications server to provide:
1) when the VCC user terminal in IMS territory registration, and by the IMS conversation, can use Session-based Messaging this moment;
2) when the VCC user terminal in IMS territory registration, but by the CS conversation, can only use Immediate Messaging this moment
3) if the IMS territory is unregistered, by the CS conversation, can't use IMS Message business this moment, must use other modes to carry out message communicating, as short message.
As can be seen, application server need obtain the character (referring to that session is VCC session or common session) of VCC user terminal session, the business state information in territory, session place, and might need other information from top two examples.
Also in IP Multimedia System, do not transmit the method for the service condition of voice call continuity service at present, can address the above problem.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of method that transmits the service condition of voice call continuity service, can be applied to transmit between network entity (application server, network element, terminal etc.) service condition of VCC session, use for service logic control.
In order to solve the problems of the technologies described above, the invention provides a kind of method that transmits the service condition of voice call continuity service, be applied to IP Multimedia System, the process of business transferring state when this method is included in the VCC call setup, this process may further comprise the steps:
(a) after voice call continuity service VCC application server receives the VCC setup requests, the VCC business state information is added in the call setup request message, and this message is sent to the service call conversation control function S-CSCF that serves into VCC user;
(b) after this S-CSCF receives this call setup request message, carry out service logic control according to user's initial filter standard or norm, the call setup request message that will contain the VCC business state information sends to the network entity on session path;
(c) after described network entity is received this call setup request message, obtain VCC business state information wherein, handle according to correspondent service logic.
Further, said method also can have following characteristics: also be included in the process of VCC business business transferring state when switching, this process may further comprise the steps:
(A) after the VCC application server receives the conversation handoff request of subscriber equipment, finish the call establishment in incision territory, send medium face update inquiry information, comprise the VCC business state information in the message to described S-CSCF;
(B) after described S-CSCF received, the medium face update inquiry information that will comprise the VCC business state information according to the session path that writes down in the call establishment sent to the network entity on session path;
(C) described network entity obtains the VCC business state information from medium face update inquiry information, handles according to correspondent service logic.
Further, said method also can have following characteristics: described VCC business state information comprises that VCC service identification and VCC call out the domain information at place.
Further, said method also can have following characteristics: described VCC service identification is according to IP Multimedia System communication business identification and IP Multimedia System application identities rule definition, and the domain information that described VCC calls out the place is included in the spreading parameter of VCC service identification.
Further, said method also can have following characteristics: what the judgement earlier of VCC application server was received in the described step (a) is originated call request or end call request, if IP Multimedia System grappling process is carried out in the originated call request, analyze the territory of calling out the place; If the territory selection course is then carried out in the end call request, determine the territory at VCC user's end call place; Then, terminate to go into to call for and ask, and replace the calling subscriber to make up the INVITE that sends to the called subscriber, insert the VCC business state information simultaneously, this message that makes up is sent to S-CSCF.
Further, said method also can have following characteristics: when described step (b) S-CSCF carries out service logic control according to user's initial filter standard or norm:
If do not find the rule of coupling, be given to the purpose remote equipment before then will comprising the call setup request message of VCC business state information; This remote equipment obtains the VCC business state information in the described step (c) from the message of receiving, handles by the corresponding service logic, finishes;
If find the rule of coupling, the call setup request message that then will comprise the VCC business state information sends to the application corresponding server, and in described step (c), this application server obtains the VCC business state information from this message, and carry out the corresponding service logic, return step (b).
Further, said method also can have following characteristics: described step (B) S-CSCF routes messages to purpose remote equipment or next application server:
If application server, after this application server is received this message in the step (C), obtain VCC business state information wherein, and handle according to correspondent service logic, the medium face update inquiry information that will comprise the VCC business state information then sends to this S-CSCF again, returns step (B);
If the purpose remote equipment, this remote equipment obtains the VCC business state information in the step (C) from this message, finishes.
Further, said method also can have following characteristics: described S-CSCF in medium face update inquiry information or/and after call setup request message is routed to the purpose remote equipment, whether remove the VCC relevant information according to the spreading parameter or the collocation strategy decision of IMS service identification.
Further, said method also can have following characteristics: the information that has also added VCC business state information transmission range in the described step (a) in call setup request message, described S-CSCF still takes out VCC service identification and additional parameter thereof according to this parameter decision reservation to purpose remote equipment business transferring state information the time.
Further, said method also can have following characteristics: the information of described VCC business state information transmission range is included in the spreading parameter of VCC service identification, be used for limiting the VCC service identification and only transmit, be not transferred to the terminal of opposite end at VCC user network and opposite end user network; Perhaps only in the network of VCC user attaching, transmit, be not transferred to the network of opposite end user attaching.
Compared with prior art, because the present invention utilizes IMS communication business identification and IMS application identities to transmit the VCC service condition in IP Multimedia System, therefore reached the effect that between VCC application server and network entity (other application servers, network element, terminal etc.), transmits the VCC service condition, satisfied professional demand, simultaneously do not influence network architecture, message flow, have good exploitativeness and autgmentability.
Description of drawings
Fig. 1 is a VCC business framework schematic diagram;
Fig. 2 is that the VCC service call is set up process VCC service condition transmission interaction figure;
Fig. 3 is that VCC business domains handoff procedure VCC service condition transmits interaction figure;
Fig. 4 is the flow chart that the VCC application server is handled the VCC service condition.
Embodiment
Below in conjunction with accompanying drawing the present invention is elaborated.
Fig. 1 is a VCC business framework schematic diagram, show with the VCC service condition and transmit related network element and annexation, comprise UE 11 (User Equipment, subscriber equipment), CS territory 12 (CircuitSwitched, circuit switching), IMS 13 (IP Multimedia Core Network Subsystem, IP Multimedia System), VCC AS 14 (Voice Call Continuity Application Server, application server for continuity of voice call), other AS 15 (Other Application Server, other application server), other networks 16, ISC interface 17 (interface of the service call conversation control function S-CSCF in application server and the IMS core net).
UE comprises CS and two modules of IMS, can set up to call out with CS territory and IMS territory respectively to be connected, and can control the switching of two intermodules.UE inserts IMS by CS, or directly inserts IMS, by IMS territory centralized control, provides and control the VCC business by VCC AS.Other application servers, network element, terminal etc. need be obtained the service condition of VCC in the network, can pass through the mutual VCC service condition of ISC interface.
This method utilizes IMS communication business identification (Identification of IMS communicationServices) and IMS application identities (Identification of IMS applications) to transmit the VCC service condition, at first, be used for type of service in call request and calling procedure expression calling according to IMS communication business identification and IMS application identities rule definition continuous voice call (VCC) service identification.Can increase a plurality of spreading parameters under the VCC service identification, present embodiment has increased the spreading parameter of an IncFlds information.
Present embodiment uses spreading parameter to represent that VCC calls out the domain information at place.
Fig. 2 is that the VCC service call is set up process VCC service condition transmission interaction figure, has described the transport process to the VCC service message on the whole, has only marked among the figure and the mutual flow process of VCC state, and other process is carried out by normal flow.Reciprocal process may further comprise the steps:
Step 201, VCC AS receives the setup requests INVITE, determine this time to call out is that VCC calls out, this setup requests may be that VCC UE is from the CS territory or the originated call request that sends of IMS territory, also may be from the CS territory or the end call request that sends over of IMS territory, call out VCC UE;
The present invention does not relate to the processing that non-VCC is called out.
Step 202, VCC AS is correspondingly processed according to the character of calling out, and originated call is carried out IMS grappling process, analyzes the territory of calling out the place, and the territory selection course is carried out in end call, determines the territory at VCC user's end call place;
Step 203, VCC AS terminates and asks into calling for, and replace the calling subscriber to make up the INVITE that sends to the called subscriber, with the VCC business state information, it is the domain information that VCC service identification and VCC call out the place, be inserted in this INVITE, and INVITE is sent to service call conversation control function S-CSCF into the VCC user of this calling service;
Step 204, S-CSCF carries out service logic control according to user's initial filter standard or norm;
Step 205, if the professional trigger condition of VCC is satisfied in request, S-CSCF sends to the application corresponding server according to the INVITE that service logic control will comprise the VCC business state information;
Step 206 after application server is received INVITE, judges that according to service identification whether this time call out is that VCC calls out, and in this way, obtains the domain information of VCC, and carries out the corresponding service logic;
Step 207 after application server executes service logic, still keeps the VCC business state information, then INVITE is sent to S-CSCF;
Step 208, S-CSCF continues to carry out service logic control according to initial filter standard or norm, if the rule (promptly satisfying the professional trigger condition of VCC) of coupling is arranged, INVITE is sent to corresponding AS, jump to step 206, otherwise, give the purpose remote equipment with the message route, this moment, whether S-CSCF can remove the VCC correlation behavior according to the spreading parameter or the collocation strategy decision of IMS service identification.
Described purpose remote equipment, different in different occasion implications, if when VCC user is the calling subscriber, refer to called network, if when VCC user is the calling subscriber, refer to terminal called.
In another case, in the step 204 of above-mentioned flow process, if S-CSCF does not find the rule of coupling, be given to called network or terminal called before then directly will comprising the INVITE of VCC business state information, this called network and terminal are obtained the VCC business state information in the message, handle according to correspondent service logic.Thereby finish the transmission of service condition.
Fig. 3 is that VCC business domains handoff procedure VCC service condition transmits interaction figure, described on the whole when the VCC business switched, the mutual transport process of VCC related service message has only marked the flow process with VCC state intercorrelation among the figure, other process is carried out by normal flow.Reciprocal process may further comprise the steps:
Step 301, the territory switching takes place in VCC user in conversation procedure, and VCC AS receives the conversation handoff request of VCC UE, and finishes the call establishment in incision territory;
Step 302, VCC AS sends medium face update request Re-INVITE or UPDATE message to S-CSCF, use SDP (the Session Description Protocol that carries in the message, Session Description Protocol) indicating remote renewal of the equipment medium face, setting up medium with the territory of VCC user terminal incision is connected, VCC AS adds the VCC business state information simultaneously in Re-INVITE or UPDATE request message, be the domain information that VCC service identification and VCC call out the place, this domain information is also represented with spreading parameter;
Step 303, after S-CSCF receives, the Re-INVITE or the UPDATE message that will comprise the VCC business state information send to corresponding AS or purpose remote equipment (being to send to AS among the figure), if AS, forward step 304 to, if remote equipment, this moment, whether S-CSCF can remove the VCC relevant information according to the spreading parameter or the collocation strategy decision of IMS service identification, and remote equipment obtains the VCC business state information from this Re-INVITE or UPDATE message;
Set up in the process in session, S-CSCF has noted the path of session, and during switching, S-CSCF need only transmit by the session path of record and get final product.
After step 304, application server are received Re-INVITE or UPDATE message, obtain VCC business state information wherein, and handle according to correspondent service logic;
Re-INVITE or UPDATE message that step 305, application server will comprise the VCC business state information send to S-CSCF;
Here the VCC business state information is called out the domain information at place except comprising VCC service identification, VCC, the information of can also IncFlds switching.
Step 306, S-CSCF routes messages to next AS or purpose remote equipment (being to send to the purpose remote equipment among the figure), if AS, return step 304, if purpose remote equipment, this moment, whether S-CSCF can remove the VCC relevant information according to the spreading parameter or the collocation strategy decision of IMS service identification, and remote equipment obtains the VCC business state information from this Re-INVITE or UPDATE message.
Fig. 4 flow chart that to be the VCC application server handle the VCC service condition, described that VCC AS this locality may further comprise the steps the processing procedure of VCC service condition among Fig. 2 and Fig. 3:
Step 401, VCC AS receives request message;
Step 402 judges whether this message is setup requests; If change step 403 over to, otherwise jump to step 408;
Step 403 judges that this setup requests is originated call or end call, if originated call changes step 404 over to, otherwise jumps to step 406;
Step 404 is carried out IMS grappling process, analyzes the territory of calling out the place;
Step 405 is inserted the VCC business state information in the originated call INVITE, i.e. VCC service identification and call out the domain information at place with the VCC that spreading parameter is represented, and jump to step 411;
Step 406 is carried out the territory selection course, determines the territory that VCC user's end call is used;
Step 407 is inserted the VCC business state information, and is jumped to step 411 in the end call INVITE;
Step 408 judges whether message is to switch message, if change step 409 over to, otherwise jump to step 410;
Step 409 is obtained the incision domain information, inserts the VCC business state information in medium updating message Re-INVITE or UPDATE, and jumps to step 411;
Step 410 is handled other request, and jumps to step 411;
Step 411 is transmitted message to S-CSCF.
This method does not need to change topology of networks, route and interface message flow process, and network architecture is not had influence.On the basis of the foregoing description, can expanded definition VCC service identification, in this service identification, add other state informations, thereby realize the transmission of these state informations.Can and comprise that the spreading parameter of domain information is that trigger condition is provided with initial filter standard or norm with the VCC service identification, increase the professional flexibility that triggers.
In addition, all right expanded definition VCC service identification parameter, in this spreading parameter, comprise VCC business state information transmission range, restriction VCC service identification only transmits in VCC user network and opposite end user network, be not transferred to the terminal of opposite end, or only in the network of VCC user attaching, transmit, be not transferred to the network of opposite end user attaching.This spreading parameter is added up when adding the VCC service identification by VCC AS simultaneously, the transmission range of definition VCC service identification and additional parameter thereof, S-CSCF can keep according to this parameter decision and still take out VCC service identification and additional parameter thereof when the purpose remote equipment transmits.
In sum, adopt the inventive method, be applied in the IP Multimedia System voice call continuity service, utilizing IMS communication business identification and spreading parameter thereof to transmit the VCC service condition makes other network entities (application server, network element, terminal etc.) obtain the service condition of VCC session, and utilize these information to carry out service logic control, satisfy business demand, and network configuration, operation flow are not had influence, have good exploitativeness and autgmentability.

Claims (10)

1, a kind of method that transmits the service condition of voice call continuity service is applied to IP Multimedia System, the process of business transferring state when this method is included in the VCC call setup, and this process may further comprise the steps:
(a) after voice call continuity service VCC application server receives the VCC setup requests, the VCC business state information is added in the call setup request message, and this message is sent to the service call conversation control function S-CSCF that serves into VCC user;
(b) after this S-CSCF receives this call setup request message, carry out service logic control according to user's initial filter standard or norm, the call setup request message that will contain the VCC business state information sends to the network entity on session path;
(c) after described network entity is received this call setup request message, obtain VCC business state information wherein, handle according to correspondent service logic.
2, the method for claim 1 is characterized in that, also is included in the process of VCC business business transferring state when switching, and this process may further comprise the steps:
(A) after the VCC application server receives the conversation handoff request of subscriber equipment, finish the call establishment in incision territory, send medium face update inquiry information, comprise the VCC business state information in the message to described S-CSCF;
(B) after described S-CSCF received, the medium face update inquiry information that will comprise the VCC business state information according to the session path that writes down in the call establishment sent to the network entity on session path;
(C) described network entity obtains the VCC business state information from medium face update inquiry information, handles according to correspondent service logic.
3, method as claimed in claim 1 or 2 is characterized in that, described VCC business state information comprises that VCC service identification and VCC call out the domain information at place.
4, method as claimed in claim 3, it is characterized in that, in system communication service identification and IP Multimedia System application identities rule definition, the domain information that described VCC calls out the place is included in the spreading parameter of VCC service identification described VCC service identification according to the IP multimedia.
5, method as claimed in claim 3, it is characterized in that what the judgement earlier of VCC application server was received in the described step (a) is originated call request or end call request, if the originated call request, carry out IP Multimedia System grappling process, analyze the territory of calling out the place; If the territory selection course is then carried out in the end call request, determine the territory at VCC user's end call place; Then, terminate to go into to call for and ask, and replace the calling subscriber to make up the INVITE that sends to the called subscriber, insert the VCC business state information simultaneously, this message that makes up is sent to S-CSCF.
6, the method for claim 1 is characterized in that, when described step (b) S-CSCF carries out service logic control according to user's initial filter standard or norm:
If do not find the rule of coupling, be given to the purpose remote equipment before then will comprising the call setup request message of VCC business state information; This remote equipment obtains the VCC business state information in the described step (c) from the message of receiving, handles by the corresponding service logic, finishes;
If find the rule of coupling, the call setup request message that then will comprise the VCC business state information sends to the application corresponding server, and in described step (c), this application server obtains the VCC business state information from this message, and carry out the corresponding service logic, return step (b).
7, method as claimed in claim 2 is characterized in that, described step (B) S-CSCF routes messages to purpose remote equipment or next application server:
If application server, after this application server is received this message in the step (C), obtain VCC business state information wherein, and handle according to correspondent service logic, the medium face update inquiry information that will comprise the VCC business state information then sends to this S-CSCF again, returns step (B);
If the purpose remote equipment, this remote equipment obtains the VCC business state information in the step (C) from this message, finishes.
8, method as claimed in claim 1 or 2, it is characterized in that, described S-CSCF in medium face update inquiry information or/and after call setup request message is routed to the purpose remote equipment, whether remove the VCC relevant information according to the spreading parameter or the collocation strategy decision of IMS service identification.
9, the method for claim 1, it is characterized in that, the information that also in call setup request message, has added VCC business state information transmission range in the described step (a), described S-CSCF still takes out VCC service identification and additional parameter thereof according to this parameter decision reservation to purpose remote equipment business transferring state information the time.
10, method as claimed in claim 9, it is characterized in that, the information of described VCC business state information transmission range is included in the spreading parameter of VCC service identification, is used for limiting the VCC service identification and only transmits at VCC user network and opposite end user network, is not transferred to the terminal of opposite end; Perhaps only in the network of VCC user attaching, transmit, be not transferred to the network of opposite end user attaching.
CN200610093619A 2006-06-19 2006-06-19 A method for sending service status of voice call continuous service Expired - Fee Related CN100589640C (en)

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