CN102244647B - The processing method of IP Multimedia System Replace parameter and device - Google Patents
The processing method of IP Multimedia System Replace parameter and device Download PDFInfo
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- CN102244647B CN102244647B CN201010174118.8A CN201010174118A CN102244647B CN 102244647 B CN102244647 B CN 102244647B CN 201010174118 A CN201010174118 A CN 201010174118A CN 102244647 B CN102244647 B CN 102244647B
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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
A kind of processing method of IP Multimedia System Replace parameter and device, S-CSCF receives the initial request or subsequent request that carry Replace Header, judges whether the AS that the 2nd Dialog ID in AS and the Replace Header that a Dialog ID of initial request or subsequent request associates associates is same AS; If not search whether there is the 3rd Dialog ID in the opposite end Dialog ID that then S-CSCF calls out at the 2nd Dialog ID place, and the AS that the AS that the 3rd Dialog ID associates associates with a Dialog ID is same AS; If had, the 2nd Dialog ID is replaced with the 3rd Dialog ID, and initial request or subsequent request are sent to corresponding AS according to call routing rule and/or IFC triggering rule.
Description
Technical field
The present invention relates to communication technical field, particularly relate to 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) define AS (Application Server, application server) at treatment S IP (Session Initiation Protocol, Session initiation Protocol) message time, 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 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 is via AS amendment, and the Dialog ID of AS both sides is by different.
According to the definition of 3GPP 24.229 5.7.5 chapters and sections, when the AS in IMS receives initial request (the Initial request for a dialog) of the dialogue with ReplaceHeader (replacement head), need to check whether AS is Routeing B2BUA or Initiating B2BUA behavior pattern.If so, and this AS is exactly the replacement person of the Dialog ID entrained by Replace Header, then need to be replaced by the Dialog ID of Replace Header before this initial request of forwarding.As shown in Figure 1, the object of replacement is, can only identify Dialog1, None-identified Dialog2 at the network element of this AS forward direction, again correctly must be replaced by the network element (this RouteingB2BUA AS) carrying out Dialog replacement.
As shown in Figure 1, at the home domain of user B, for the request of Dialog1, AS shows as RouteingB2BUA, uses new Dialog2 Forward-reques.When receiving new initial request (using Dialog3), carrying Replace Header is Dialog2, and now, S-CSCF is triggered to this AS, AS to be needed Replace Header to be revised as Dialog1 forwarding.
If 3GPP just define AS receive this type of request after process.But when practical application, the initial request of Dialog3 may can't deliver to this AS, but according to IFC (InitialFilter Criteria, initial filter criteria) rule such as to trigger and delivered to other AS (Other AS), as shown in Figure 2, if S-CSCF has been triggered to Other AS, then can cause the DialogID (Dialog2 in figure) of this AS None-identified Replace Header.According to RFC3891, if the Dialog ID of None-identified or coupling ReplaceHeader, reciever can use 481 refusal requests.
In actual applications, the situation of Replace Header is carried for subsequent request in calling, there is the possibility that AS can not identify the Dialog ID of Replace Header equally.
Therefore, need to provide a solution, for carrying subsequent request in the new initial request of Replace Header and calling, ensure Replace Header with Dialog ID correctly can 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 is to provide a kind of processing method and device of IP Multimedia System Replace parameter, ensure in initial request or subsequent voice calls request with Replace Header can correctly be replaced, solve the impact that the shortcoming of existing 3GPP AS on the support of Relpace parameter is brought.
In order to solve the 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) receives the initial request or subsequent request that carry and replace head (Replace Header);
Described S-CSCF judges whether the AS that the application server (AS) that first dialogue identifier (Dialog ID) of described initial request or subsequent request associates associates with the 2nd Dialog ID in described Replace Header is same AS;
If not then described S-CSCF searches whether there is the 3rd Dialog ID in the opposite end Dialog ID of described 2nd Dialog ID place calling, and the AS that the AS that described 3rd Dialog ID associates associates with a described Dialog ID is same AS;
If had, then described 2nd Dialog ID is replaced with described 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 AS that a described Dialog ID associates with described 2nd Dialog ID is same AS, then described initial request or subsequent request are directly sent to described corresponding AS by described S-CSCF.
Wherein, described corresponding AS is specially:
If initial request, then described corresponding AS is the AS determined according to IFC triggering rule;
If subsequent request, then described corresponding AS is the AS determined according to call routing rule.
Wherein, described S-CSCF is when the opposite end Dialog ID of described 2nd Dialog ID place calling searches the 3rd Dialog ID, if judge that the AS that the AS that the opposite end Dialog ID found associates associates with a described DialogID is not same AS, then continue the next opposite end Dialog ID searching described 2nd DialogID place calling, until find the 3rd Dialog ID, the AS that the AS that described 3rd Dialog ID is associated associates with a described Dialog ID is same AS.
Wherein, if described S-CSCF does not find the 3rd Dialog ID in the opposite end Dialog ID of described 2nd Dialog ID place calling, then direct described initial request or subsequent request are sent to described corresponding AS, reply Replace Header described in failure response or transparent transmission by described corresponding AS decision-making.
Wherein, described S-CSCF determines according to call routing rule and/or IFC triggering rule the AS that described Dialog ID associates.
Present invention also offers a kind of processing unit of IP Multimedia System Replace parameter, be applied to S-CSCF, described device comprises request reception unit, Replacement Decision unit and request transmitting unit further, wherein:
Described request receiving element is used for, the initial request received or subsequent request carry ReplaceHeader, and judge whether the AS that the AS that a Dialog ID of described initial request or subsequent request associates associates with the 2nd Dialog ID in described Replace Header 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 of described 2nd Dialog ID place calling, search whether there is the 3rd Dialog ID, and the AS that the AS that described 3rd Dialog ID associates associates with a described Dialog ID is same AS; If had, then, after described 2nd Dialog ID being replaced with described 3rd Dialog ID, described initial request or subsequent request are sent to described request transmitting element;
Described request retransmission unit is used for, and the described initial request received or subsequent request are sent to corresponding AS according to call routing rule and/or IFC triggering rule.
Wherein, described request receiving element also for, if when the AS that a described Dialog ID associates with described 2nd Dialog ID is same AS, then direct described request is sent to described request retransmission unit.
Wherein, described Replacement Decision unit is further used for, when the opposite end Dialog ID of described 2nd Dialog ID place calling searches the 3rd Dialog ID, if judge that the AS that the AS that the opposite end Dialog ID found associates associates with a described Dialog ID is not same AS, then continue the next opposite end Dialog ID searching described 2nd Dialog ID place calling, until find the 3rd DialogID, the AS that the AS that described 3rd Dialog ID is associated associates with a described Dialog ID 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 of described 2nd Dialog ID place calling, then direct described initial request or subsequent request is sent to described request retransmission unit.
Adopt technical solution of the present invention, for carrying subsequent request in the new initial request of Replace Header and calling, ensure Replace Header with Dialog ID correctly can be replaced by the forward direction network element of B2BUA behavior pattern.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet that AS performs B2BUA behavior;
Fig. 2 is the schematic flow sheet that AS performs B2BUA behavior;
Fig. 3 is the schematic flow sheet of the processing method of the Replace parameter of the embodiment of the present invention;
Fig. 4 is that the S-CSCF of application example of the present invention carries Repalce Header process flow schematic diagram to subsequent request in calling;
Fig. 5 is that the S-CSCF of application example of the present invention is to initial request Repalce Header process flow schematic diagram.
Embodiment
Main thought of the present invention is as follows: in actual applications, initiates to carry the user of the user of the request of Replace Header or same implicitly registered set identical with the user of former calling, all registers via same S-CSCF.One Dialog ID of setting request itself is D1, the 2nd Dialog ID carried in Replace Header is D2, as long as S-CSCF ensures before the request of this being carried Replace Header is sent to AS, the AS that D1 with D2 associates is same AS, then this request is sent to AS by routing rule or IFC triggering rule by S-CSCF, just can ensure that first AS can identify 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 IMS system Replace parameter, the following technical scheme of concrete employing:
S-CSCF receives the initial request or subsequent request that carry Replace Header;
Described S-CSCF judges whether the AS that the AS that first dialogue identifier (DialogID) of described initial request or subsequent request associates associates with the 2nd Dialog ID in described Replace Header is same AS;
If not then described S-CSCF searches whether there is the 3rd Dialog ID in the opposite end Dialog ID of described 2nd Dialog ID place calling, and the AS that the AS that described 3rd Dialog ID associates associates with a described Dialog ID is same AS;
If had, then described 2nd Dialog ID is replaced with described 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 AS that a described Dialog ID associates with described 2nd Dialog ID is same AS, then described initial request or subsequent request are directly sent to described corresponding AS by described S-CSCF.
Wherein, above-mentioned corresponding AS is specially:
If initial request, then described corresponding AS is the AS determined according to IFC triggering rule;
If subsequent request, then described corresponding AS is the AS determined according to call routing rule.
Further, described S-CSCF determines according to call routing rule and/or IFC triggering rule the AS that described Dialog ID associates.
Further, described S-CSCF is when the opposite end Dialog ID of described 2nd Dialog ID place calling searches the 3rd Dialog ID, if judge that the AS that the AS that the opposite end Dialog ID found associates associates with a described Dialog ID is not same AS, then continue the next opposite end Dialog ID searching described 2nd Dialog ID place calling, until find the 3rd Dialog ID, the AS that the AS that described 3rd Dialog ID is associated associates with a described Dialog ID is same AS.
If described S-CSCF does not find the 3rd Dialog ID in the opposite end Dialog ID of described 2nd Dialog ID place calling, then direct described initial request or subsequent request are sent to described corresponding AS, reply Replace Header described in failure response or transparent transmission by described corresponding AS decision-making.
Below in conjunction with the accompanying drawings and the specific embodiments the enforcement of technical solution of the present invention is described in further detail.
As shown in Figure 3, the processing method of the IMS system Replace parameter of the embodiment of the present invention comprises:
Steps A, S-CSCF receives initial request (as INVITE, REFER)/subsequent request (as REFER) D1 and carries Replace Header, and the Dialog ID of Replace Header is D2;
Step B, S-CSCF judge the AS that D1 (the Dialog ID of request itself) associates, and whether the AS associated with D2 (the Dialog ID carried in Replace Header) is same AS, if, then perform step C, otherwise, perform step D;
Step C, if the AS that AS with D2 of D1 association associates is same AS, then S-CSCF decision-making does not need the replacement carrying out Replace Header, and this request is directly sent to corresponding AS according to regular (initial request judges by Record-route head by IFC rule or subsequent request);
Step D, if the AS that AS with D2 of D1 association associates is not same AS, then S-CSCF: according to the Dialog ID place calling in Replace Header, as shown in Figure 4, the AB calling at D6 place, searches opposite end Dialog ID (Dx), if found, then perform step e; Otherwise, perform step F;
Step e, S-CSCF judges whether the AS that D1 with Dx associates respectively is same AS, if so, then performs step G; Otherwise, continue to perform step D;
Now, after returning step D, S-CSCF will continue the opposite end Dialog ID searching the calling of D2 place, as shown in Figure 4, searches, until the AS finding Dx and D1 to associate is same AS successively according to the order of D6-D5-D4-D3-D2 in AB calling.
Step F, if search less than associating the opposite end Dialog ID that AS is same AS with D1, then this request received directly is sent to corresponding AS by triggering rule by S-CSCF, carry out decision-making by AS and reply 481 failure responses or this Replace Header of transparent transmission, carry out final decision by the network element of this request of termination;
Step G, if find the opposite end Dialog ID that the AS associated with D1 is same AS, then S-CSCF decision-making needs the replacement carrying out Replace Header, after the D2 of Replace Header that then this asks by S-CSCF replaces with D3 (Dx), then this request is sent to corresponding AS according to regular.
Wherein, such scheme initial request is still called out in subsequent request message, be similar to the urban d evelopment of S-CSCF.
Below by for the handling process of S-CSCF to Repalce Header; in conjunction with embody rule example, implementation method of the present invention is described; should be understood that; the inventive method is applicable equally for other application scenarioss; further, other application scenarioss of the inventive method are used also all should to belong to the protection range of this patent.
Application example one
The S-CSCF that Fig. 4 shows the present invention's application example carries the process flow figure of Repalce Header to subsequent request in calling, and this example application scene description is as follows:
At the home domain of UE-B, then the calling that UE-A initiates calls out UE-B through AS1, AS2 and AS3; There is Dialog 1 to Dialog 6 totally 6 Dialog ID in now AB calling;
Initiate a call to UE-C by UE-B, through AS1, and without AS2 and AS3, now, there is Dialog 7 to Dialog 8 totally 2 Dialog ID in BC calling;
The UE-B interior subsequent request (as Refer) that makes a call is carried Replace Header and is called out through BC, and now, the Dialog ID of request itself is the Dialog ID of D7, Replace Header is D6.
As shown in Figure 4, the S-CSCF step of carrying the implementation method of the request of Replace Header for this is as follows:
Step one, S-CSCF receive UE-B initiate the calling of carrying Replace Header in subsequent request (as Refer), the Dialog ID of request itself is D7, the Dialog ID of Replace Header is D6, according to call routing rule, S-CSCF judges that the AS that D7 associates is AS1, the AS of D6 association is AS3, does not belong to same AS;
Step 2, S-CSCF need the opposite end Dialog ID searching D6 associated call, are D5, and then find D4; Now S-CSCF continues to judge that the AS that D4 associates is AS2, and the AS1 associated with D7 is not same AS, needs to continue to search;
Step 3, S-CSCF need the opposite end Dialog ID searching D4 associated call to be D3, and then find D2; Now, S-CSCF continues to judge that AS that D2 associates be the AS1 that AS1 with D7 associates is same AS, then the Dialog ID of Replace Header is replaced with D2 by S-CSCF;
After the Dialog ID of Replace Header is replaced with D2 by step 4, S-CSCF, by call routing rule in calling, this request is sent to AS1.Such guarantee AS can identify the DialogID of Replace Header and carry out correct operation.
Application example two
Fig. 5 shows the S-CSCF of Another Application example of the present invention to the process flow figure of initial request Repalce Header, and this example application scene description is as follows:
At the home domain of UE-B, then the calling that UE-A initiates calls out UE-B through AS1, AS2 and AS3; There is Dialog 1 to Dialog 6 totally 6 Dialog ID in now AB calling;
The initial request (as Invite) that UE-B initiates is carried Replace Header triggering and is newly called out through AS1; Now, the Dialog ID of request itself is the Dialog ID of D7, Replace Header is D6.
As shown in Figure 5, the S-CSCF step of carrying the implementation method of the request of Replace Header for this is as follows:
Step one, S-CSCF receive the initial request (as Invite) of carrying Replace Header that UE-B initiates; The Dialog ID of request itself is the Dialog ID of D7, Replace Header is D6.According to IFC triggering rule, S-CSCF judges that asking the AS be sent to is AS1; And the AS of D6 association is AS3, not same AS;
Step 2, S-CSCF need the opposite end DialogID searching D6 associated call, are D5, and then find D4; Now S-CSCF continues to judge that the AS that D4 associates is AS2, and the AS1 associated with D7 is not same AS, needs to continue to search;
Step 3, S-CSCF need the opposite end DialogID searching D4 associated call, are D3, and then find D2; Now S-CSCF continues to judge that the AS that D2 associates is AS1, and the AS1 associated with D7 belongs to same AS; Now, the Dialog ID of Replace Header is replaced with D2 by S-CSCF;
After the Dialog ID of Replace Header is replaced with D2 by step 4, S-CSCF, by IFC triggering rule, this request is sent to AS1.Such guarantee AS can identify the Dialog ID of Replace Header and carry out correct operation.
In addition, present invention also offers a kind of processing unit (not shown) of IP Multimedia System Replace parameter, be applied to S-CSCF, this device comprises request reception unit, Replacement Decision unit and request transmitting unit further, wherein:
Described request receiving element is used for, the initial request received or subsequent request carry ReplaceHeader, and judge whether the AS that the AS that a Dialog ID of described initial request or subsequent request associates associates with the 2nd Dialog ID in described Replace Header 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 of described 2nd Dialog ID place calling, search whether there is the 3rd Dialog ID, and the AS that the AS that described 3rd Dialog ID associates associates with a described Dialog ID is same AS; If had, then, after described 2nd Dialog ID being replaced with described 3rd Dialog ID, described initial request or subsequent request are sent to described request transmitting element;
Described request retransmission unit is used for, and the described initial request received or subsequent request are sent to corresponding AS according to call routing rule and/or IFC triggering rule.
Wherein, described request receiving element also for, if when the AS that a described Dialog ID associates with described 2nd Dialog ID is same AS, then direct described request is sent to described request retransmission unit.
Wherein, described Replacement Decision unit is further used for, when the opposite end Dialog ID of described 2nd Dialog ID place calling searches the 3rd Dialog ID, if judge that the AS that the AS that the opposite end Dialog ID found associates associates with a described Dialog ID is not same AS, then continue the next opposite end Dialog ID searching described 2nd Dialog ID place calling, until find the 3rd DialogID, the AS that the AS that described 3rd Dialog ID is associated associates with a described Dialog ID 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 of described 2nd Dialog ID place calling, then direct described initial request or subsequent request is sent to described request retransmission unit.
The foregoing is only the preferred embodiment of the present invention, be not limited to the present invention, for those skilled in the art, the present invention can have various modifications and variations.All within the present invention's spirit and principle, any amendment done, equivalent replacement and improvement etc., be all included within protection scope of the present invention.
Claims (10)
1. a processing method for IP Multimedia System Replace parameter, is characterized in that, described method comprises:
Service call conversation control function S-CSCF receives the initial request or subsequent request that carry and replace head Replace Header;
Described S-CSCF judges whether the AS that the application server AS that the first dialogue identifier Dialog ID of described initial request or subsequent request associates associates with the 2nd Dialog ID in described Replace Header is same AS;
If not then described S-CSCF searches whether there is the 3rd Dialog ID in the opposite end Dialog ID of described 2nd Dialog ID place calling, and the AS that the AS that described 3rd Dialog ID associates associates with a described Dialog ID is same AS;
If had, then described 2nd Dialog ID is replaced with described 3rd Dialog ID, and described initial request or subsequent request are sent to the AS of a described Dialog ID association 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 AS that a described Dialog ID associates with described 2nd Dialog ID is same AS, then described initial request or subsequent request are directly sent to corresponding AS by described S-CSCF.
3. method as claimed in claim 2, is characterized in that,
Described corresponding AS is specially:
If initial request, then described corresponding AS is the AS determined according to IFC triggering rule;
If subsequent request, then described corresponding AS is the AS determined according to call routing rule.
4. method as claimed in claim 3, is characterized in that,
Described S-CSCF is when the opposite end Dialog ID of described 2nd Dialog ID place calling searches the 3rd Dialog ID, if judge that the AS that the AS that the opposite end Dialog ID found associates associates with a described Dialog ID is not same AS, then continue the next opposite end Dialog ID searching described 2nd Dialog ID place calling, until find the 3rd Dialog ID, the AS that the AS of described 3rd DialogID association is associated with a described Dialog ID 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 of described 2nd Dialog ID place calling, then direct described initial request or subsequent request are sent to described corresponding AS, reply Replace Header described in failure response or 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 according to call routing rule and/or IFC triggering rule the AS that described Dialog ID associates.
7. a processing unit for IP Multimedia System Replace parameter, is characterized in that, is applied to S-CSCF, and described device comprises request reception unit, Replacement Decision unit and request transmitting unit further, wherein:
Described request receiving element is used for, the initial request received or subsequent request carry ReplaceHeader, and judge whether the AS that the AS that a Dialog ID of described initial request or subsequent request associates associates with the 2nd Dialog ID in described Replace Header 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 of described 2nd Dialog ID place calling, search whether there is the 3rd Dialog ID, and the AS that the AS that described 3rd Dialog ID associates associates with a described Dialog ID is same AS; If had, then, after described 2nd Dialog ID being replaced with described 3rd Dialog ID, described initial request or subsequent request are sent to described request transmitting element;
Described request retransmission unit is used for, and the described initial request received or subsequent request are sent to the AS of a described Dialog ID association according to call routing rule and/or IFC triggering rule.
8. device as claimed in claim 7, is characterized in that,
Described request receiving element also for, if when the AS that a described Dialog ID associates with described 2nd Dialog ID is same AS, then direct described request is sent to described request retransmission unit.
9. device as claimed in claim 7 or 8, is characterized in that,
Described Replacement Decision unit is further used for, when the opposite end Dialog ID of described 2nd Dialog ID place calling searches the 3rd Dialog ID, if judge that the AS that the AS that the opposite end Dialog ID found associates associates with a described Dialog ID is not same AS, then continue the next opposite end Dialog ID searching described 2nd Dialog ID place calling, until find the 3rd Dialog ID, the AS that the AS that described 3rd Dialog ID is associated associates with a described Dialog ID 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 of described 2nd Dialog ID place calling, then direct described initial request or subsequent request is sent to 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 |
|---|---|---|---|---|
| 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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