CN102244647A - Replace parameter processing method and device of an IP multi-media subsystem - Google Patents
Replace parameter processing method and device of an IP multi-media subsystem Download PDFInfo
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- CN102244647A CN102244647A CN2010101741188A CN201010174118A CN102244647A CN 102244647 A CN102244647 A CN 102244647A CN 2010101741188 A CN2010101741188 A CN 2010101741188A CN 201010174118 A CN201010174118 A CN 201010174118A CN 102244647 A CN102244647 A CN 102244647A
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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]
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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
- H04L65/1101—Session protocols
- H04L65/1104—Session initiation protocol [SIP]
Abstract
The invention relates to a Replace parameter processing method and device of an IP multi-media subsystem. After an initial request or a subsequent request carrying a Replace Header is received by an S-CSCF (Serving Call Session Control Function), the S-CSCF judges whether AS (Application Server) associated with a first Dialog ID of the initial request or subsequent request is same with AS associated with a second Dialog ID in the Replace Header; if not, the S-CSCF finds out whether a third Dialog ID exists in a Dialog ID at the opposite end of the second Dialog ID, and the AS associated with the second Dialog ID is same with the AS associated with the first Dialog ID; and if the third Dialog ID exists in the Dialog ID at the opposite end of the second Dialog ID, the second Dialog ID is replaced with the third Dialog ID, and the initial request or subsequent request is sent to the corresponding AS according to call routing criteria and/or IFC (Initial Filtering Criteria).
Description
Technical field
The present invention relates to communication technical field, relate in particular to the processing method and the device of a kind of IMS (IP Multimedia Subsystem, IP Multimedia System) Replace parameter.
Background technology
3GPP (3rd Generation Partner Project, third generation partner program) definition AS (Application Server, application server) at treatment S IP (Session Initiation Protocol, Session initiation Protocol) during message, behavior pattern can be Proxy (agency), Routeing B2BUA (Routeing Back to Back User Agent, route back-to-back user agent) or InitiatingB2BUA (initial back-to-back user agent).Wherein the Routeing B2BUA is the tupe of a kind of very similar Proxy, when AS adopts Routeing B2BUA or Initiating B2BUA behavior pattern, the Dialog ID (session identification) of AS both sides revises via AS, and the Dialog ID of AS both sides is with different.
Definition according to 3GPP 24.229 5.7.5 chapters and sections, when the AS among the IMS receives the initial request (Initial request for a dialog) of the dialogue that has ReplaceHeader (replacement head), need to check whether AS is Routeing B2BUA or Initiating B2BUA behavior pattern.And if this AS is exactly the replacement person of the entrained Dialog ID of Replace Header, then need be before transmitting this initial request the Dialog ID of Replace Header be replaced.As shown in Figure 1, the purpose of replacement is, can only discern Dialog1 at the network element of this AS forward direction, can't discern Dialog2, must correctly replace again by carrying out the network element (this RouteingB2BUA AS) that Dialog replaces.
As shown in Figure 1, at the home domain of user B, for the request of Dialog1, AS shows as RouteingB2BUA, uses new Dialog2 to transmit request.When receiving new initial request (using Dialog3), carrying Replace Header is Dialog2, and at this moment, S-CSCF is triggered to this AS, and AS need be revised as Replace Header Dialog1 and transmit.
If 3GPP has just defined the processing after AS receives this type of request.But when practical application, the initial request of Dialog3 may can't be delivered to this AS, but according to IFC (InitialFilter Criteria, initial filter criteria) rule such as triggering has been delivered to other AS (Other AS), as shown in Figure 2, if S-CSCF has been triggered to Other AS, then can cause this AS can't discern the DialogID (Dialog2 among the figure) of Replace Header.According to RFC3891, if can't discern or mate the Dialog ID of ReplaceHeader, reciever can use 481 refusal requests.
In actual applications, the situation for subsequent request in calling out is carried Replace Header exists AS can not discern the possibility of the Dialog ID of Replace Header equally.
Therefore, need provide a solution, subsequent request for the new initial request that carries Replace Header and in calling out, guarantee Replace Header with Dialog ID can correctly be replaced by the forward direction network element of B2BUA behavior pattern.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of processing method and device of IP Multimedia System Replace parameter, guarantee that the Replace Header that has in initial request or the subsequent voice calls request can correctly be replaced, solve the influence that existing 3GPP AS brings the shortcoming of Relpace parameter support.
In order to address the above problem, the invention provides a kind of processing method of IP Multimedia System Replace parameter, described method comprises:
Service call conversation control function (S-CSCF) is received and is carried the initial request or the subsequent request of replacing head (Replace Header);
Described S-CSCF judges whether related application server (AS) AS related with the 2nd Dialog ID among the described Replace Header of first dialogue identifier (Dialog ID) of described initial request or subsequent request is same AS;
If not then described S-CSCF searches whether the 3rd Dialog ID is arranged in the opposite end Dialog ID that call out at described the 2nd Dialog ID place, and the AS of described the 3rd Dialog ID association AS related with a described Dialog ID is same AS;
If have, then described the 2nd Dialog ID is replaced with described the 3rd Dialog ID, and described initial request or subsequent request are sent to corresponding AS according to call routing rule and/or initial filter criteria (IFC) triggering rule.
Wherein, if when the described Dialog ID AS related with described the 2nd Dialog ID is same AS, then described S-CSCF directly sends to described corresponding AS with described initial request or subsequent request.
Wherein, described corresponding AS is specially:
If initial request, then described corresponding AS is the AS that determines according to the IFC triggering rule;
If subsequent request, then described corresponding AS is the AS that determines according to call routing rule.
Wherein, when the opposite end Dialog ID that described S-CSCF calls out at described the 2nd Dialog ID place searches the 3rd Dialog ID, if judging the AS AS related with a described DialogID of the opposite end Dialog ID association that finds is not same AS, then continue to search the next opposite end Dialog ID that call out at described the 2nd DialogID place, until finding the 3rd Dialog ID, make that the AS AS related with a described Dialog ID of described the 3rd Dialog ID association is same AS.
Wherein, if described S-CSCF does not find the 3rd Dialog ID in the opposite end Dialog ID that call out at described the 2nd Dialog ID place, then directly described initial request or subsequent request are sent to described corresponding AS, reply failure response or the described Replace Header of transparent transmission by described corresponding AS decision-making.
Wherein, described S-CSCF determines the AS of described Dialog ID association according to call routing rule and/or IFC triggering rule.
The present invention also provides a kind of processing unit of IP Multimedia System Replace parameter, is applied to S-CSCF, and described device further comprises request receiving element, Replacement Decision unit and request transmitting unit, wherein:
The described request receiving element is used for, initial request or the subsequent request received carry ReplaceHeader, and whether the AS AS related with the 2nd Dialog ID among the described Replace Header that judges a Dialog ID association of described initial request or subsequent request is same AS, if not, then trigger described Replacement Decision unit;
Described Replacement Decision unit is used for, after receiving the notice of described request processing unit, in the opposite end Dialog ID that call out at described the 2nd Dialog ID place, search whether the 3rd Dialog ID is arranged, and the AS of described the 3rd Dialog ID association AS related with a described Dialog ID is same AS; If have, then described the 2nd Dialog ID is replaced with described the 3rd Dialog ID after, described initial request or subsequent request are sent to the described request transmitting element;
The described request retransmission unit is used for, and described initial request or the subsequent request of receiving sent to corresponding AS according to call routing rule and/or IFC triggering rule.
Wherein, the described request receiving element also is used for, if when the described Dialog ID AS related with described the 2nd Dialog ID is same AS, then directly described request is sent to the described request retransmission unit.
Wherein, described Replacement Decision unit is further used for, when the opposite end Dialog ID that calls out at described the 2nd Dialog ID place searches the 3rd Dialog ID, if judging the AS of the opposite end Dialog ID association that the finds AS related with a described Dialog ID is not same AS, then continue to search the next opposite end Dialog ID that call out at described the 2nd Dialog ID place, until finding the 3rd DialogID, make that the AS AS related with a described Dialog ID of described the 3rd Dialog ID association is same AS.
Wherein, described Replacement Decision unit is further used for, if do not find the 3rd Dialog ID in the opposite end Dialog ID that call out at described the 2nd Dialog ID place, then directly described initial request or subsequent request is sent to the described request retransmission unit.
Adopt technical solution of the present invention, subsequent request for the new initial request that carries Replace Header and in calling out, guarantee Replace Header with Dialog ID can correctly be replaced by the forward direction network element of B2BUA behavior pattern.
Description of drawings
Fig. 1 carries out the schematic flow sheet of B2BUA behavior for AS;
Fig. 2 carries out the schematic flow sheet of B2BUA behavior for AS;
Fig. 3 is the schematic flow sheet of processing method of the Replace parameter of the embodiment of the invention;
Fig. 4 uses example for the present invention S-CSCF carries Repalce Header process flow schematic diagram to subsequent request in calling out;
Fig. 5 uses the S-CSCF of example to initial request Repalce Header process flow schematic diagram for the present invention.
Embodiment
Main thought of the present invention is as follows: in actual applications, initiate to carry the user of the identical or same implicitly registered set of the user of the requesting users of Replace Header and former calling, all via same S-CSCF registration.The one Dialog ID of setting request itself is D1, the 2nd Dialog ID that carries among the Replace Header is D2, as long as S-CSCF guaranteed before the request of this being carried Replace Header sends to AS, the D1 AS related with D2 is same AS, then S-CSCF sends to AS by routing rule or IFC triggering rule with this request, just can guarantee that AS at first can discern the Dialog ID of ReplaceHeader, and then this AS can carry out correct replacement according to the behavior pattern of its B2BUA.
Based on above-mentioned thinking, the invention provides a kind of processing method of the IMS Replace of system parameter, specifically adopt following technical scheme:
S-CSCF receives initial request or the subsequent request that carries Replace Header;
Described S-CSCF judges whether the related AS AS related with the 2nd Dialog ID among the described Replace Header of first dialogue identifier (DialogID) of described initial request or subsequent request is same AS;
If not then described S-CSCF searches whether the 3rd Dialog ID is arranged in the opposite end Dialog ID that call out at described the 2nd Dialog ID place, and the AS of described the 3rd Dialog ID association AS related with a described Dialog ID is same AS;
If have, then described the 2nd Dialog ID is replaced with described the 3rd Dialog ID, and described initial request or subsequent request are sent to corresponding AS according to call routing rule and/or initial IFC triggering rule.
Further, if when the described Dialog ID AS related with described the 2nd Dialog ID is same AS, then described S-CSCF directly sends to described corresponding AS with described initial request or subsequent request.
Wherein, above-mentioned corresponding AS is specially:
If initial request, then described corresponding AS is the AS that determines according to the IFC triggering rule;
If subsequent request, then described corresponding AS is the AS that determines according to call routing rule.
Further, described S-CSCF determines the AS of described Dialog ID association according to call routing rule and/or IFC triggering rule.
Further, when the opposite end Dialog ID that described S-CSCF calls out at described the 2nd Dialog ID place searches the 3rd Dialog ID, if judging the AS of the opposite end Dialog ID association that the finds AS related with a described Dialog ID is not same AS, then continue to search the next opposite end Dialog ID that call out at described the 2nd Dialog ID place, until finding the 3rd Dialog ID, make that the AS AS related with a described Dialog ID of described the 3rd Dialog ID association is same AS.
If described S-CSCF does not find the 3rd Dialog ID in the opposite end Dialog ID that call out at described the 2nd Dialog ID place, then directly described initial request or subsequent request are sent to described corresponding AS, reply failure response or the described Replace Header of transparent transmission by described corresponding AS decision-making.
Enforcement to technical solution of the present invention describes in further detail below in conjunction with the accompanying drawings and the specific embodiments.
As shown in Figure 3, the processing method of the Replace of the IMS system parameter of the embodiment of the invention comprises:
Steps A, S-CSCF receives that (as INVITE, REFER)/subsequent request (as REFER) D1 carries Replace Header, the Dialog ID of Replace Header is D2 to initial request;
Step B, S-CSCF judge the AS of D1 (the Dialog ID of request itself) association, and whether the AS related with D2 (the Dialog ID that carries among the Replace Header) is same AS, if, execution in step C then, otherwise, execution in step D;
Step C, if the AS of the D1 association AS related with D2 is same AS, then the S-CSCF decision-making does not need to carry out the replacement of Replace Header, and this request is directly sent to corresponding AS according to regular (initial request is judged by the Record-route head by IFC rule or subsequent request);
Step D is not if the AS of the D1 association AS related with D2 is same AS, then S-CSCF: call out according to the Dialog ID place among the Replace Header, as shown in Figure 4, the AB at D6 place calls out, and searches opposite end Dialog ID (Dx), if find, execution in step E then; Otherwise, execution in step F;
Step e, S-CSCF judges whether the related respectively AS of D1 and Dx is same AS, if, execution in step G then; Otherwise, continue execution in step D;
At this moment, return step D after, S-CSCF will continue searches the opposite end Dialog ID that call out at the D2 place, as shown in Figure 4, in AB calls out, search successively according to the order of D6-D5-D4-D3-D2, be same AS up to finding the Dx AS related with D1.
Step F, if the opposite end Dialog ID that to search less than related AS with D1 be same AS, then this request that will receive of S-CSCF directly sends to corresponding AS by triggering rule, make a strategic decision by AS and to reply 481 failure responses or this Replace Header of transparent transmission, come final decision by the network element of this request of termination;
Step G, if find the AS related with D1 is the opposite end Dialog ID of same AS, then the S-CSCF decision-making need be carried out the replacement of Replace Header, after then S-CSCF replaces with D3 (Dx) with the D2 of the Replace Header of this request, again this request is sent to corresponding AS according to regular.
Wherein, such scheme is for the subsequent request message of initial request in still calling out, and it is similar that the enforcement of S-CSCF is required.
To be example to the handling process of Repalce Header below with S-CSCF; come implementation method of the present invention is described in conjunction with the concrete example of using; should be understood that; the inventive method is suitable equally for other application scenarioss; and other application scenarioss of use the inventive method also all should belong to the protection range of this patent.
Use example one
Fig. 4 shows the S-CSCF of an application of the present invention example to calling out the process flow figure that interior subsequent request is carried Repalce Header, and this example application scene description is as follows:
At the home domain of UE-B, the calling that UE-A initiates is called out UE-B then through AS1, AS2 and AS3; AB called out and had Dialog 1 to Dialog 6 totally 6 Dialog ID this moment;
Initiate a call to UE-C by UE-B, through AS1, and without AS2 and AS3, at this moment, BC calls out and has Dialog 7 to Dialog 8 totally 2 Dialog ID;
The UE-B interior subsequent request (as Refer) that makes a call is carried Replace Header and is called out through BC, and at this moment, the Dialog ID of request itself is D7, and the Dialog ID of Replace Header is D6.
As shown in Figure 4, S-CSCF is as follows for the step of implementation method of request that this carries Replace Header:
The opposite end Dialog ID that step 3, S-CSCF need search the D4 associated call is D3, and then finds D2; At this moment, S-CSCF continues to judge that the AS of D2 association is that the AS1 AS1 related with D7 is same AS, and then S-CSCF replaces with D2 with the Dialog ID of Replace Header;
Use example two
Fig. 5 shows the process flow figure of the S-CSCF of Another Application example of the present invention to initial request Repalce Header, and this example application scene description is as follows:
At the home domain of UE-B, the calling that UE-A initiates is called out UE-B then through AS1, AS2 and AS3; AB called out and had Dialog 1 to Dialog 6 totally 6 Dialog ID this moment;
The initial request (as Invite) that UE-B initiates is carried Replace Header and is triggered new the calling through AS1; At this moment, the Dialog ID of request itself is D7, and the Dialog ID of Replace Header is D6.
As shown in Figure 5, S-CSCF is as follows for the step of implementation method of request that this carries Replace Header:
In addition, the present invention also provides a kind of processing unit (not shown) of IP Multimedia System Replace parameter, is applied to S-CSCF, and this device further comprises request receiving element, Replacement Decision unit and request transmitting unit, wherein:
The described request receiving element is used for, initial request or the subsequent request received carry ReplaceHeader, and whether the AS AS related with the 2nd Dialog ID among the described Replace Header that judges a Dialog ID association of described initial request or subsequent request is same AS, if not, then trigger described Replacement Decision unit;
Described Replacement Decision unit is used for, after receiving the notice of described request processing unit, in the opposite end Dialog ID that call out at described the 2nd Dialog ID place, search whether the 3rd Dialog ID is arranged, and the AS of described the 3rd Dialog ID association AS related with a described Dialog ID is same AS; If have, then described the 2nd Dialog ID is replaced with described the 3rd Dialog ID after, described initial request or subsequent request are sent to the described request transmitting element;
The described request retransmission unit is used for, and described initial request or the subsequent request of receiving sent to corresponding AS according to call routing rule and/or IFC triggering rule.
Wherein, the described request receiving element also is used for, if when the described Dialog ID AS related with described the 2nd Dialog ID is same AS, then directly described request is sent to the described request retransmission unit.
Wherein, described Replacement Decision unit is further used for, when the opposite end Dialog ID that calls out at described the 2nd Dialog ID place searches the 3rd Dialog ID, if judging the AS of the opposite end Dialog ID association that the finds AS related with a described Dialog ID is not same AS, then continue to search the next opposite end Dialog ID that call out at described the 2nd Dialog ID place, until finding the 3rd DialogID, make that the AS AS related with a described Dialog ID of described the 3rd Dialog ID association is same AS.
Wherein, described Replacement Decision unit is further used for, if do not find the 3rd Dialog ID in the opposite end Dialog ID that call out at described the 2nd Dialog ID place, then directly described initial request or subsequent request is sent to the described request retransmission unit.
The above is the preferred embodiment of the present invention only, is not limited to the present invention, and for those skilled in the art, the present invention can have various changes and variation.All within the present invention spirit and principle, any modification of being done, be equal to replacement and improvement etc., all be included within protection scope of the present invention.
Claims (10)
1. the processing method of an IP Multimedia System Replace parameter is characterized in that, described method comprises:
Service call conversation control function (S-CSCF) is received and is carried the initial request or the subsequent request of replacing head (Replace Header);
Described S-CSCF judges whether related application server (AS) AS related with the 2nd Dialog ID among the described Replace Header of first dialogue identifier (Dialog ID) of described initial request or subsequent request is same AS;
If not then described S-CSCF searches whether the 3rd Dialog ID is arranged in the opposite end Dialog ID that call out at described the 2nd Dialog ID place, and the AS of described the 3rd Dialog ID association AS related with a described Dialog ID is same AS;
If have, then described the 2nd Dialog ID is replaced with described the 3rd Dialog ID, and described initial request or subsequent request are sent to corresponding AS according to call routing rule and/or initial filter criteria (IFC) triggering rule.
2. the method for claim 1 is characterized in that,
If when the described Dialog ID AS related with described the 2nd Dialog ID was same AS, then described S-CSCF directly sent to described corresponding AS with described initial request or subsequent request.
3. method as claimed in claim 1 or 2 is characterized in that,
Described corresponding AS is specially:
If initial request, then described corresponding AS is the AS that determines according to the IFC triggering rule;
If subsequent request, then described corresponding AS is the AS that determines according to call routing rule.
4. method as claimed in claim 3 is characterized in that,
When the opposite end Dialog ID that described S-CSCF calls out at described the 2nd Dialog ID place searches the 3rd Dialog ID, if judging the AS of the opposite end Dialog ID association that the finds AS related with a described Dialog ID is not same AS, then continue to search the next opposite end Dialog ID that call out at described the 2nd Dialog ID place, until finding the 3rd Dialog ID, make that the AS AS related with a described Dialog ID of described the 3rd DialogID association is same AS.
5. method as claimed in claim 4 is characterized in that,
If described S-CSCF does not find the 3rd Dialog ID in the opposite end Dialog ID that call out at described the 2nd Dialog ID place, then directly described initial request or subsequent request are sent to described corresponding AS, reply failure response or the described Replace Header of transparent transmission by described corresponding AS decision-making.
6. method as claimed in claim 1 or 2 is characterized in that,
Described S-CSCF determines the AS of described Dialog ID association according to call routing rule and/or IFC triggering rule.
7. the processing unit of an IP Multimedia System Replace parameter is characterized in that, is applied to S-CSCF, and described device further comprises request receiving element, Replacement Decision unit and request transmitting unit, wherein:
The described request receiving element is used for, initial request or the subsequent request received carry ReplaceHeader, and whether the AS AS related with the 2nd Dialog ID among the described Replace Header that judges a Dialog ID association of described initial request or subsequent request is same AS, if not, then trigger described Replacement Decision unit;
Described Replacement Decision unit is used for, after receiving the notice of described request processing unit, in the opposite end Dialog ID that call out at described the 2nd Dialog ID place, search whether the 3rd Dialog ID is arranged, and the AS of described the 3rd Dialog ID association AS related with a described Dialog ID is same AS; If have, then described the 2nd Dialog ID is replaced with described the 3rd Dialog ID after, described initial request or subsequent request are sent to the described request transmitting element;
The described request retransmission unit is used for, and described initial request or the subsequent request of receiving sent to corresponding AS according to call routing rule and/or IFC triggering rule.
8. device as claimed in claim 7 is characterized in that,
The described request receiving element also is used for, if when the described Dialog ID AS related with described the 2nd Dialog ID is same AS, then directly described request is sent to the described request retransmission unit.
9. as claim 7 or 8 described devices, it is characterized in that,
Described Replacement Decision unit is further used for, when the opposite end Dialog ID that calls out at described the 2nd Dialog ID place searches the 3rd Dialog ID, if judging the AS of the opposite end Dialog ID association that the finds AS related with a described Dialog ID is not same AS, then continue to search the next opposite end Dialog ID that call out at described the 2nd Dialog ID place, until finding the 3rd Dialog ID, make that the AS AS related with a described Dialog ID of described the 3rd Dialog ID association is same AS.
10. device as claimed in claim 9 is characterized in that,
Described Replacement Decision unit is further used for, if do not find the 3rd Dialog ID in the opposite end Dialog ID that call out at described the 2nd Dialog ID place, then directly described initial request or subsequent request is sent to the described request retransmission unit.
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| CN201010174118.8A CN102244647B (en) | 2010-05-13 | 2010-05-13 | The processing method of IP Multimedia System Replace parameter and device |
| PCT/CN2011/073074 WO2011140892A1 (en) | 2010-05-13 | 2011-04-20 | Method and apparatus for processing ip multimedia subsystem replacement parameters |
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| WO2009005316A1 (en) * | 2007-07-04 | 2009-01-08 | Lg Electronics Inc. | Method for supporting session mobility |
| CN101668008A (en) * | 2009-09-25 | 2010-03-10 | 华为技术有限公司 | Transfer operation-containing communication method, device and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2009005316A1 (en) * | 2007-07-04 | 2009-01-08 | Lg Electronics Inc. | Method for supporting session mobility |
| CN101668008A (en) * | 2009-09-25 | 2010-03-10 | 华为技术有限公司 | Transfer operation-containing communication method, device and system |
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