CN101291448A - Method, system and apparatus for called routing - Google Patents

Method, system and apparatus for called routing Download PDF

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Publication number
CN101291448A
CN101291448A CN200710100494.0A CN200710100494A CN101291448A CN 101291448 A CN101291448 A CN 101291448A CN 200710100494 A CN200710100494 A CN 200710100494A CN 101291448 A CN101291448 A CN 101291448A
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China
Prior art keywords
request message
call request
network element
territory
user agent
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CN200710100494.0A
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Chinese (zh)
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朱东铭
张恒梁
叶松海
丁春燕
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CN200710100494.0A priority Critical patent/CN101291448A/en
Priority to PCT/CN2008/070727 priority patent/WO2008125063A1/en
Publication of CN101291448A publication Critical patent/CN101291448A/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
    • H04L65/1066—Session management
    • H04L65/1069—Session establishment or de-establishment
    • 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
    • H04L65/10—Architectures or entities
    • H04L65/1016—IP multimedia subsystem [IMS]

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

Abstract

The invention discloses a method, a system and a device for a called routing, wherein, a user agent network element is inserted into a call path after a DSF selects a CS domain sequential session and a call request message is routed to users through the user agent network element. The method comprises the following steps that: after the domain selection function DSF selects the CS domain sequential session, related information which has the call request message routed to the user agent network element is added into the call request message which is sent down to an S-CSCF; the S-CSCF has the call request message routed to the user agent network element according to the related information; and the user agent network element has the call request message routed to the prior called user through a CS domain according to obtained routing information.

Description

The method, system and device of called route
Technical field
The present invention relates to the communications field, particularly relate to the method, system and device of called route.
Background technology
IMS is an IP Multimedia System in the WCDMA network of 3GPP R5/R6 standard definition, is that the 3G mobile network is realized packet voice and grouped data, and the unified multimedia service and the objective network of application are provided.IMS adopts the bearer path of IP packet domain as its control signaling and media delivery, adopts Session Initiation Protocol as call control signalling.In IMS, the user contracting data of IMS concentrates among the HSS to be managed, and business is provided by the application server AS unification, session control is finished by S-CSCF, both separate on network configuration fully, and business is toggled to AS by S-CSCF and handles, but collaborative work between a plurality of AS.The user inserts IMS by current location agent node P-CSCF, session and professional control are then finished by the home domain service node of its registered place, therefore the user can obtain same service at diverse access point, has realized that three that service management, session control and carrying insert separates and provides with the business of access and location independent.
IMS is the description of 3GPP and Tispan, in 3GPP2, also there is a similar IP multimedia subsystem, IMS to be called MMD (Multimedia Domain, multimedia domain, MMD), the similar of itself and IMS, so hereinafter for for simplicity, just do not consider the situation of MMD again, but content clearly described below equally also is applicable to MMD.
[GRUU related background art]
Carrying out when called, for the situation of multiple terminals share I MPU, give a plurality of UE in order to prevent SIP REQUEST bifurcated (forking), IETF and 3GPP have introduced this notion of GRUU.GRUU is that the Instance ID by IMPU and UE combines.Wherein Instance ID is the globally unique ID that is used for identifying UE Instance, and so GRUU can identify a UE uniquely.Even IMPU is shared by a plurality of UE, still can guarantee GRUU sip message is sent on the UE of unique appointment as REQUEST URI.
[feature tag related background art]
This is a kind of application system (with reference to RFC 3840) that IETF adds on the SIP signaling, be used for behind the contact header field, adding various parameters, showing the various application powers of terminal, as the language of audio capability, video capability, locomotivity, support, purposes (commercial still individual), the SIP method of supporting, priority etc.And another one mechanism is exactly IETF " both caller preferences (CallerPreferences) " that propose in RFC 3841, this mechanism is to use together in conjunction with top feature tag, the application characteristic that can specify some terminal calleds to have according to the attribute of session by the calling party, perhaps the application characteristic that should not have (carrying in the Accept-contact header field) allows network search for only terminal according to the application power of appointment in a plurality of terminals of called use and continues.
[DSAI is relevant to be introduced]
Whether DSAI is a certain activation of service of a sign whether sign, allow AS that a certain business is set dynamically and activate.If do not need to activate, be a certain business setting Inactive then by the SH interface, the iFC of this business correspondence of HSS is set to Inactive, and the iFC after upgrading is issued to S-CSCF, just calls out like this and can not be triggered to corresponding AS.The essence of DSAI is exactly that AS can activate or deactivate certain or some iFC as required.
[background context of ICS]
At network in the IMS evolution process, a period of time CS will appear, IMS and the situation of depositing, at this moment, the user wishes to have in the network control point to carry out centralized control in the business in two territories to own, so that the minimizing deployment is with management costs and consistent business experience is provided, this central controlled point generally all is in the IMS network, is realized by AS.Just when the user passes through the CS network insertion, provide professional at the IMS network for it equally.At present all relate to this problem at aspects such as the centralized traffic control of 3GPP and TISPAN, in the centralized traffic Control Study project of 3GPP, the ICS framework is referring to shown in Figure 1:
Wherein, ICCF is called IMS circuit domain control function (IMS CS Control Function), has finished by adaptive between the SIP signaling of IMS territory of CS domain signaling, and as a user agent, realizes that the user in the business control in IMS territory and alternately.When the territory among the VCC AS is selected entity DSF to choose CS to continue session,, just need route the call to ICCF like this, route the call to the user by ICCF by the CS territory again in order to carry out the control of follow-up business.
In present VCC standard when the territory is selected entity DSF to choose the CS territory to continue session, it will be determined to the routing number (CSRN) in CS territory, VCC AS can be modified as CSRN to Request-uri, thereby routes calls to the CS territory, calls out the AS that just can not be triggered to other once more like this.Idiographic flow comprises series of steps referring to shown in Figure 2:
1, S-CSCF has received the call request message of directed towards user.
2, S-CSCF is triggered to DSF to call request message according to the triggering rule of iFC.
3～4, DSF carries out the territory and selects, and according to the territory selective rule of himself, chooses the session that continues of CS territory, will determine CSRN then.
5, DSF is issued to S-CSCF to calling;
6, S-CSCF finds that Request-uri is CSRN, just call request message is routed to MGCF (omitted with BGCF mutual).
7～9, MGCF determines MSRN according to CSRN, then call request message is routed to former called subscriber.
The inventor thinks as seen in Figure 2, choosing the CS territory at DSF continues after the session, will make Request-uri into CSRN, calling will directly be routed to the CS territory through S-CSCF like this, but in the ICS problem, need in the call path between DSF and the S-CSCF, insert ICCF, thereby make ICCF can participate in the control of follow-up business.
Summary of the invention
The embodiment of the invention provides the method, system and device of called route, realizes that DSF chooses the CS territory and continues after the session, can insert user agent's network element in call path, and via this user agent's network element call request message is routed to the user.
The method of the called route of the embodiment of the invention comprises: the territory is selected entity DSF to choose the CS territory to continue after the session, add the relevant information that this call request message is routed to user agent's network element in being handed down to the call request message of S-CSCF; S-CSCF is routed to user agent's network element according to described relevant information with this call request message; And user agent's network element is routed to former called subscriber with this call request message through the CS territory according to the routing iinformation that obtains.
Entity is selected in the territory of the embodiment of the invention, comprising: the territory selected cell is used to choose CS territory the continue session or the session that continues to the PS territory; First adding device is used for when the territory selected cell is chosen the CS territory and continued session, adds the relevant information that this call request message is routed to user agent's network element in call request message to be issued; Transmitting element is used for the call request message after the processing of first adding device is handed down to S-CSCF.
User agent's network element of the embodiment of the invention comprises: receiving element is used for the receipt of call request message;
Acquiring unit is used to obtain the routing iinformation in former called number or CS territory; Determining unit is used for the former called number that obtains according to acquiring unit or the routing iinformation in CS territory, determines routing iinformation; Routing unit is used for the routing iinformation definite according to determining unit, and call request message is routed to former called subscriber through the CS territory.
The system of the called route of the embodiment of the invention comprises: DSF, S-CSCF, user agent's network element and former called user terminal; Described DSF is used to choose the session that continues of CS territory, and adds the relevant information that this call request message is routed to user agent's network element in being handed down to the call request message of S-CSCF; S-CSCF is used for according to described relevant information this call request message being routed to user agent's network element; User agent's network element is used for according to the routing iinformation that obtains this call request message being routed to former called user terminal through the CS territory.
The another kind of called method for routing of the embodiment of the invention comprises: the user adheres in the CS territory and in the PS territory when unregistered, user agent's network element is by DSAI mechanism, and the iFC that will be triggered to this user agent's network element activates; When DSF chooses the CS territory and continues session afterwards, call request message is handed down to S-CSCF; S-CSCF is triggered to this user agent's network element according to iFC with this call request message; And this user agent's network element is routed to former called subscriber with this call request message through the CS territory according to the routing iinformation that obtains.
Because in the embodiment of the invention, DSF chooses the CS territory and continues after the session, S-CSCF in being handed down to the call request message of S-CSCF, adds the relevant information that this call request message is routed to user agent's network element, so can be routed to user agent's network element with this call request message according to described relevant information; User agent's network element is routed to former called subscriber with this call request message through the CS territory according to the routing iinformation that obtains afterwards.Thereby realized that DSF chooses the CS territory and continues after the session, can in call path, insert user agent's network element, and call request message is routed to the user through the CS territory, satisfied the demand of ICS problem via this user agent's network element.
Because in the embodiment of the invention, the user adheres in the CS territory and in the PS territory when unregistered, user agent's network element is by DSAI mechanism, and the iFC that will be triggered to this user agent's network element activates; So, can realize that DSF chooses the CS territory and continues after the session afterwards according to existing procedure, can in call path, insert user agent's network element, and call request message is routed to the user through the CS territory via this user agent's network element, satisfied the demand of ICS problem.
Description of drawings
Fig. 1 is the ICS configuration diagram in the centralized traffic Control Study project of existing 3GPP;
Fig. 2 chooses continue route flow chart after the session of CS territory for existing DSF;
Fig. 3 is the method step flow chart of a kind of called route of the embodiment of the invention;
Fig. 4 is the structural representation that entity is selected in the territory of the embodiment of the invention;
Fig. 5 is the structural representation of user agent's network element of the embodiment of the invention;
Fig. 6 is the flow chart of the embodiment of the invention one;
Fig. 7 is the flow chart of the embodiment of the invention two;
Fig. 8 is the flow chart of the embodiment of the invention three;
Fig. 9 is the flow chart of the embodiment of the invention four;
Figure 10 is the flow chart of the embodiment of the invention five;
Figure 11 is the another kind of called method for routing flow chart of steps of the embodiment of the invention;
Figure 12 is the flow chart of the embodiment of the invention six.
Embodiment
In order to realize that DSF chooses the CS territory and continues after the session, can in call path, insert user agent's network element, and call request message is routed to the user via this user agent's network element.
The embodiment of the invention provides a kind of method of called route, referring to shown in Figure 3, comprises the following steps:
S11, DSF choose the session that continues of CS territory.
S12, DSF add the relevant information that this call request message is routed to user agent's network element in being handed down to the call request message of S-CSCF.
Wherein, described relevant information can be the PSI of user agent's network element; Then the PSI of DSF acquisition user agent network element comprises the following steps: that DSF sends signaling is obtained former called subscriber to HSS MSRN; User agent's network element carries out signaling catching, and returns the PSI of this user agent's network element in the response message of the signaling of tackling; And DSF obtains the PSI of this user agent's network element from this response message.Perhaps,
Described relevant information is the PSI of user agent's network element; DSF obtains relevant information from the PSI of user agent's network element of local static configuration.Perhaps,
Described relevant information is a both caller preferences information, and DSF obtains both caller preferences information and comprises the following steps: that user agent's network element when replacing the user to register, carries user's Feature tag in login request message; S-CSCF reports DSF with user's Feature tag.The both caller preferences information that DSF adds is exactly the information that the user reports in Feature tag.Perhaps,
Described relevant information is the GRUU of user agent's network element; Then the GRUU of DSF acquisition user agent network element comprises the following steps: that user agent's network element when replacing the user to register, carries instance-id in login request message; S-CSCF distributes GRUU according to the instance-id in the login request message of receiving for this user agent's network element, and this GRUU is reported DSF.Perhaps,
Described relevant information is for triggering the information of initial filter criteria iFC, and the described relevant information that S-CSCF adds in call request message according to DSF is carried out the iFC coupling, and according to the iFC after the coupling this call request message is triggered to user agent's network element.
S13, S-CSCF are routed to user agent's network element according to described relevant information with this call request message.
S14, user agent's network element are routed to former called subscriber (being the called subscriber of the script sensing of call request message) according to the routing iinformation that obtains with this call request message through the CS territory.
The embodiment of the invention also provides a kind of territory to select entity, and referring to shown in Figure 4, it comprises: territory selected cell, first adding device and transmitting element; Further comprise: the acquiring unit and second adding device.
The territory selected cell is used to choose CS territory the continue session or the session that continues to the PS territory.
Acquiring unit is used to obtain the relevant information that call request message is routed to user agent's network element, and transfers to first adding device and handle.
First adding device is used for when the territory selected cell is chosen the CS territory and continued session, adds the relevant information that this call request message is routed to user agent's network element in call request message to be issued.
Second adding device is used at the call request message former called number of interpolation to be issued or the routing iinformation in CS territory.
Transmitting element is used for first adding device, or the call request message after first adding device and the processing of second adding device is handed down to S-CSCF.
The embodiment of the invention also provides a kind of user agent's network element, and referring to shown in Figure 5, it comprises: receiving element, acquiring unit, determining unit and routing unit.
Receiving element is used for the receipt of call request message.
Acquiring unit is used to obtain the routing iinformation in former called number or CS territory.
Determining unit is used for the former called number that obtains according to acquiring unit or the routing iinformation in CS territory, determines routing iinformation.
Routing unit is used for the routing iinformation definite according to determining unit, and call request message is routed to former called subscriber through the CS territory.
The embodiment of the invention also provides a kind of system of called route, comprising: DSF (being the DSF of the embodiment of the invention), S-CSCF, user agent's network element (being user agent's network element of the embodiment of the invention) and former called user terminal.
Described DSF is used to choose the session that continues of CS territory, and adds the relevant information that this call request message is routed to user agent's network element in being handed down to the call request message of S-CSCF.
S-CSCF is used for according to described relevant information this call request message being routed to user agent's network element.
User agent's network element is used for according to the routing iinformation that obtains this call request message being routed to former called user terminal through the CS territory.
Below specifically describe by 5 embodiment.
[embodiment one] returns the PSI of ICCF by the mode of signaling catching, and by CSRN call request message is routed to the user.Referring to shown in Figure 6, comprise the following steps:
1, S-CSCF has received the call request message of directed towards user.
2, S-CSCF is triggered to DSF to call request message according to the triggering rule of iFC.
3, DSF carries out the territory and selects, and according to the territory selective rule of himself, chooses the session that continues of CS territory, and sends SRI and order HSS to obtain former called subscriber's MSRN.
4, ICCF carries out signaling catching, returns the PSI of himself in the response message of SRI message.
5, DSF is the PSI of the ICCF that obtains from response message, be filled up among the Request-uri of call request message, and former called subscriber's CSRN (being got by the MSRN in response message conversion) is filled up in the P-Called-Party-ID header field of call request message and (or former called subscriber's CSRN is filled up in the History-info header field, or in other header fields), then call request message is issued to S-CSCF.
6, S-CSCF is routed to ICCF to call request message according to the PSI of the ICCF among the Request-uri of call request message.
7, ICCF determines former called subscriber's CSRN, and this CSRN is filled up among the Request-uri of call request message, then call request message is issued to S-CSCF.
8, S-CSCF finds that the Request-uri in the call request message is CSRN, just this call request message is routed to MGCF (omitted with BGCF mutual).
9, MGCF determines MSRN according to CSRN, then call request message is routed to former called subscriber.
[embodiment two] in the DSF static configuration PSI of ICCF, and call request message is routed to the user by CSRN.Referring to shown in Figure 7, comprise the following steps:
1, S-CSCF has received the call request message of directed towards user.
2, S-CSCF is triggered to DSF to call request message according to the triggering rule of iFC.
3, DSF carries out the territory selection, according to the territory selective rule of himself, choose the session that continues of CS territory, and the PSI of ICCF of configuration is filled up among the Request-uri of call request message, and former called subscriber's number information is filled up in the P-Called-Party-ID header field of call request message and (or former called subscriber's number information is filled up in the History-info header field, or in other header fields), then call request message is issued to S-CSCF.
4, S-CSCF is routed to ICCF to call request message according to the PSI of the ICCF among the Request-uri of call request message.
5, ICCF determines former called subscriber's CSRN (the number information conversion by former called subscriber gets), and this CSRN is filled up among the Request-uri of call request message, then call request message is issued to S-CSCF.
6, S-CSCF finds that the Request-uri in the call request message is CSRN, just this call request message is routed to MGCF (omitted with BGCF mutual).
7, MGCF determines MSRN according to CSRN, then call request message is routed to former called subscriber.
[embodiment three] are routed to ICCF by both caller preferences mechanism with call request message, and by CSRN call request message are routed to the user.Referring to shown in Figure 8, comprise the following steps:
1, S-CSCF has received the call request message (carrying former called number information among the Request-uri of this call request message) of directed towards user.
2, S-CSCF is triggered to DSF to call request message according to the triggering rule of iFC.
3, DSF carries out the territory and selects, and according to the territory selective rule of himself, chooses the session that continues of CS territory, so be filled up to the continue information A ccept-Contact:Access-type=CS of session of CS in the Accept-Contact of call request message header field.And in the P-Called-Party-ID of call request message header field or History-info header field, carry the routing iinformation (CSRN) in CS territory.Then call request message is issued to S-CSCF.
4, S-CSCF is according to the requirement of the Accept-Contact the inside of call request message, the connection of finding ICCF meets the requirements (when ICCF replaces user's registration, reported access network type, S-CSCF will the registration of recording user at the ICCF place be the CS territory like this, like this according to Access-type=CS, just navigated to ICCF), so call request message is routed to ICCF.
5, ICCF directly with the CSRN that carries in the P-Called-Party-ID header field of call request message or the History-info header field, is filled up among the Request-uri of call request message, then call request message is issued to S-CSCF; The former called number information of perhaps carrying among the Request-uri according to call request message is determined CSRN (conversion gets), and this CSRN is filled up among the Request-uri of call request message, then call request message is issued to S-CSCF.
6, S-CSCF finds that the Request-uri in the call request message is CSRN, just routes calls to MGCF (omitted with BGCF mutual).
7, MGCF determines MSRN according to CSRN, routes calls to former called subscriber then.
[notes]
1, requires ICCF in the present embodiment when replacing the user to register, utilize Feature tag mechanism to report user's access network type to be CS.
2, in the step 3 of Fig. 8, DSF also can fill in the information that refusal PS inserts, such as: Reject-Contact:Access-type=PS.Be equal to the continue information A ccept-Contact:Access-type=CS of session of CS.
[embodiment four] are routed to ICCF by GRUU with call request message.Referring to shown in Figure 9, comprise the following steps:
1, S-CSCF has received the call request message of directed towards user.
2, S-CSCF is triggered to DSF to call request message according to the triggering rule of iFC.
3, DSF carries out the territory selection, according to the territory selective rule of himself, choose the session that continues of CS territory, and the GRUU of ICCF is filled up among the Request-uri of call request message, and former called subscriber's number information is put in P-Called-Party-ID header field or the History-info header field.Then call request message is issued to S-CSCF.
4, S-CSCF navigates to the connection of ICCF according to the GRUU among the Request-uri of call request message, so call request message is routed to ICCF.
5, ICCF finds former called subscriber's number from the P-Called-Party-ID header field of call request message or History-info header field, and the number that Request-uri changes to former called subscriber, then call request message is sent to MGCF.
6, MGCF routes calls to the user according to normal call flow.
[notes]
Require ICCF in the present embodiment when replacing the user to register, the generation of logic an instance-id, just can to utilize this instance-id be GRUU of ICCF distribution to S-CSCF like this, and GRUU has been reported DSF.
[embodiment five] trigger iFC by the information that DSF adds, and according to this iFC call request message are routed to ICCF, and by CSRN call request message are routed to the user.Referring to shown in Figure 10, comprise the following steps:
1, S-CSCF has received the call request message of directed towards user.(carrying former called number information among the Request-uri of this call request message).
2, S-CSCF is triggered to DSF to call request message according to the triggering rule of iFC.
3, DSF carries out the territory selection, according to the territory selective rule of himself, choose the session that continues of CS territory, and in the Accept-Contact of call request message header field, perhaps add indication S-CSCF in History-info header field or other the header field call request message is routed to the trigger message of the iFC of ICCF, then call request message is issued to S-CSCF.
4, S-CSCF is routed to ICCF to call request message according to the iFC that is triggered.
5, the former called number information of carrying among the Request-uri of ICCF according to call request message is determined CSRN (conversion gets), and this CSRN is filled up among the Request-uri of call request message, then call request message is issued to S-CSCF.
6, S-CSCF finds that Request-uri is CSRN, just call request message is routed to MGCF (omitted with BGCF mutual).
7, MGCF determines MSRN according to CSRN, then call request message is routed to former called subscriber.
The embodiment of the invention also provides another kind of called method for routing, referring to shown in Figure 11, comprises the following steps:
When S21, user adhered in the CS territory, user agent's network element activated the iFC that is triggered to this user agent's network element by DSAI mechanism.
When S22, DSF choose the CS territory and continue session, call request message is handed down to S-CSCF.
S23, S-CSCF are triggered to this user agent's network element according to iFC with this call request message.
S24, this user agent's network element are routed to former called subscriber with this call request message through the CS territory according to the routing iinformation that obtains.
Below specifically describe by an embodiment.
[embodiment six] trigger by DSAI mechanism, call request message is routed to ICCF, and by CSRN call request message is routed to the user.Referring to shown in Figure 12, comprise the following steps:
1, S-CSCF has received the call request message of directed towards user.
2, S-CSCF is triggered to DSF to call request message according to the triggering rule of iFC.
3, DSF carries out the territory selection, according to the territory selective rule of himself, choose the session that continues of CS territory, and can in the P-Called-Party-ID of call request message header field or History-info header field, carry the routing iinformation in CS territory, then call request message is issued to S-CSCF.
4, S-CSCF is triggered to ICCF to call request message according to the triggering rule of iFC.
5, ICCF determines former called subscriber's CSRN again, and this CSRN is filled up among the Request-uri of call request message by the MSRN of HSS/HLR to the former called subscriber of VLR inquiry acquisition according to this MSRN, then call request message is issued to S-CSCF.Also can utilize the routing iinformation in the CS territory of carrying in the P-Called-Party-ID header field of call request message or the History-info header field, determine former called subscriber's CSRN.
6, S-CSCF finds that Request-uri is CSRN, just call request message is routed to MGCF (omitted with BGCF mutual).
7, MGCF determines MSRN according to CSRN, then call request message is routed to former called subscriber.
[notes]
1, requires ICCF to utilize DSAI mechanism that the iFC that is routed to ICCF is activated in the present embodiment, be issued to S-CSCF then, use in order to step 4.When the user nullified in the CS territory, call request message did not just need to be routed to ICCF, and at this moment user agent's network element will be triggered to the iFC deactivation of this user agent's network element by DSAI mechanism.
2, in the present embodiment step 5, ICCF determines the process of former called subscriber's CSRN again by the MSRN of HSS/HLR to the former called subscriber of VLR inquiry acquisition according to this MSRN, suitable equally in embodiment one to five; ICCF obtains the mode of routing iinformation among the embodiment one to five, is suitable for too in the present embodiment.
In sum, because in the embodiment of the invention, DSF chooses the CS territory and continues after the session, S-CSCF in being handed down to the call request message of S-CSCF, adds the relevant information that this call request message is routed to user agent's network element, so can be routed to user agent's network element with this call request message according to described relevant information; User agent's network element is routed to former called subscriber with this call request message through the CS territory according to the routing iinformation that obtains afterwards.Thereby realized that DSF chooses the CS territory and continues after the session, can in call path, insert user agent's network element, and call request message is routed to the user through the CS territory, satisfied the demand of ICS problem via this user agent's network element.
Further, the foregoing description one to five has been described the different situations that this call request message are routed to the relevant information of user agent's network element respectively.
Because in the embodiment of the invention, the user adheres in the CS territory and in the PS territory when unregistered, user agent's network element is by DSAI mechanism, and the iFC that will be triggered to this user agent's network element activates; So, can realize that DSF chooses the CS territory and continues after the session afterwards according to existing procedure, can in call path, insert user agent's network element, and call request message is routed to the user through the CS territory via this user agent's network element, satisfied the demand of ICS problem.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.

Claims (18)

1, a kind of method of called route is characterized in that, comprises the following steps:
The territory is selected entity DSF to choose the CS territory to continue after the session, add the relevant information that this call request message is routed to user agent's network element in being handed down to the call request message of S-CSCF;
S-CSCF is routed to user agent's network element according to described relevant information with this call request message; And
User agent's network element is routed to former called subscriber with this call request message through the CS territory according to the routing iinformation that obtains.
2, the method for claim 1 is characterized in that, described relevant information is the PSI of user agent's network element;
The PSI that DSF obtains user agent's network element comprises the following steps: that DSF sends signaling is obtained former called subscriber to HSS MSRN; User agent's network element carries out signaling catching, and returns the PSI of this user agent's network element in the response message of the signaling of tackling; And DSF obtains the PSI of this user agent's network element from this response message.
3, the method for claim 1 is characterized in that, described relevant information is the PSI of user agent's network element; DSF obtains relevant information from the PSI of user agent's network element of local static configuration.
4, the method for claim 1 is characterized in that, described relevant information is a both caller preferences information;
DSF obtains both caller preferences information and comprises the following steps: that user agent's network element when replacing the user to register, carries user's Feature tag in login request message; S-CSCF reports DSF with user's Feature tag.
5, the method for claim 1 is characterized in that, described relevant information is the GRUU of directed towards user agent network element;
The GRUU that DSF obtains user agent's network element comprises the following steps: that user agent's network element when replacing the user to register, carries instance-id in login request message; S-CSCF distributes GRUU according to the instance-id in the login request message of receiving for this user agent's network element, and this GRUU is reported DSF.
6, the method for claim 1 is characterized in that, the described relevant information that S-CSCF adds in call request message according to DSF is carried out the iFC coupling, and according to the iFC after the coupling this call request message is triggered to user agent's network element.
7, as claim 2,3 or 5 described methods, it is characterized in that described relevant information is carried among the Request-uri of call request message.
8, method as claimed in claim 7 is characterized in that, DSF also carries the routing iinformation in described former called number or CS territory in the P-Called-Party-ID of the call request message that is handed down to S-CSCF header field or History-info header field; And
User agent's network element is searched the routing iinformation in described former called number or CS territory in the P-Called-Party-ID of described call request message header field or History-info header field, and determines routing iinformation in view of the above.
9, method as claimed in claim 4 is characterized in that, described relevant information is carried in the Accept-contact header field of call request message or in the Reject-contact header field.
10, the method for stating as claim 6 or 9 is characterized in that, DSF also carries the routing iinformation in CS territory in the P-Called-Party-ID of the call request message that is handed down to S-CSCF header field or History-info header field; And
User agent's network element obtains the routing iinformation in described former called number or CS territory in described call request message, and determines routing iinformation in view of the above.
11, entity is selected in a kind of territory, it is characterized in that, comprising:
The territory selected cell is used to choose CS territory the continue session or the session that continues to the PS territory;
First adding device is used for when the territory selected cell is chosen the CS territory and continued session, adds the relevant information that this call request message is routed to user agent's network element in call request message to be issued;
Transmitting element is used for the call request message after the processing of first adding device is handed down to S-CSCF.
12, entity as claimed in claim 11 is characterized in that, also comprises:
Acquiring unit is used to obtain described relevant information, and transfers to first adding device and handle.
13, entity as claimed in claim 11 is characterized in that, also comprises:
Second adding device is used at the call request message former called number of interpolation to be issued or the routing iinformation in CS territory.
14, a kind of user agent's network element is characterized in that, comprising:
Receiving element is used for the receipt of call request message;
Acquiring unit is used to obtain the routing iinformation in former called number or CS territory;
Determining unit is used for the former called number that obtains according to acquiring unit or the routing iinformation in CS territory, determines routing iinformation;
Routing unit is used for the routing iinformation definite according to determining unit, and call request message is routed to former called subscriber through the CS territory.
15, a kind of system of called route is characterized in that, comprising: DSF, S-CSCF, user agent's network element and former called user terminal;
Described DSF is used to choose the session that continues of CS territory, and adds the relevant information that this call request message is routed to user agent's network element in being handed down to the call request message of S-CSCF;
S-CSCF is used for according to described relevant information this call request message being routed to user agent's network element;
User agent's network element is used for according to the routing iinformation that obtains this call request message being routed to former called user terminal through the CS territory.
16, a kind of called method for routing is characterized in that, comprises the following steps:
When the user adhered in the CS territory, user agent's network element activated the iFC that is triggered to this user agent's network element by DSAI mechanism; Afterwards
When DSF chooses the CS territory and continues session, call request message is handed down to S-CSCF;
S-CSCF is triggered to this user agent's network element according to iFC with this call request message; And
This user agent's network element is routed to former called subscriber with this call request message through the CS territory according to the routing iinformation that obtains.
17, method as claimed in claim 16 is characterized in that, when the user nullified in the CS territory, user agent's network element will be triggered to the iFC deactivation of this user agent's network element by DSAI mechanism.
18, method as claimed in claim 16 is characterized in that, DSF in the P-Called-Party-ID of the call request message that is handed down to S-CSCF header field or History-info header field, carry the CS territory routing iinformation and
User agent's network element obtains the routing iinformation in described former called number or CS territory in described call request message, and determines routing iinformation in view of the above.
CN200710100494.0A 2007-04-17 2007-04-17 Method, system and apparatus for called routing Pending CN101291448A (en)

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