WO2011134290A1 - 替换参数的替换方法及系统 - Google Patents
替换参数的替换方法及系统 Download PDFInfo
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- WO2011134290A1 WO2011134290A1 PCT/CN2011/070405 CN2011070405W WO2011134290A1 WO 2011134290 A1 WO2011134290 A1 WO 2011134290A1 CN 2011070405 W CN2011070405 W CN 2011070405W WO 2011134290 A1 WO2011134290 A1 WO 2011134290A1
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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
- H04L65/10—Architectures or entities
- H04L65/1045—Proxies, e.g. for session initiation protocol [SIP]
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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
- H04L65/1046—Call controllers; Call servers
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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
- H04L65/1063—Application servers providing network services
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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]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/14—Session management
- H04L67/147—Signalling methods or messages providing extensions to protocols defined by standardisation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/51—Discovery or management thereof, e.g. service location protocol [SLP] or web services
Definitions
- the present invention relates to the field of communications technologies, and in particular, to an IP Multimedia Subsystem (IMS), in which an application server replaces a Replace parameter and a system.
- IMS IP Multimedia Subsystem
- the 3rd Generation Partner Project (3GPP) defines that the Application Server (AS) can handle proxy initiation protocol (SIP) messages, and the behavior mode can be proxy (proxy) and route back-to-back users.
- Routeing Back to Back User Agent Routee B2BUA
- Initial Back-to-Back User Agent Initiating B2BUA
- the Routeing B2BUA is a 4-way Proxy-like processing mode.
- the AS uses the Routeing B2BUA or Initiating B2BUA behavior mode, the session IDs on both sides of the AS are modified by the AS.
- the Dialog IDs on the sides of the AS will be different. .
- the AS For the request of Dialog1, the AS performs B2BUA behavior as Routeing B2BUA or Initiating B2BUA, and forwards the request using the new Dialog2.
- the AS needs to modify the Replace Header to be Dialogl forwarded.
- the Dialog that forwards the request can continue to use Dialog3 or use the new Dialog ID ( Dialog4 ).
- 3GPP only defines the processing after the AS receives such a request, but in actual application, the initial request of Dialog3 may not be sent to the AS, resulting in a subsequent network. The element does not recognize the Dialog ID of the Replace Header (see Dialogl in Figure 1).
- the Dialog ID of the Replace Header cannot be identified/matched, and the recipient can reject the request using 481. Therefore, there is a need to provide a solution to ensure a new initial request. If a Replace Header is carried and the Dialog ID carried by the Replace Header has been replaced by the AS of the B2BUA behavior mode, the Dialog ID can be sent to the forward network. The meta-process is re-corrected to ensure that the Replace Header can be processed correctly.
- the technical problem to be solved by the present invention is to provide a replacement method and system for replacing parameters, which can ensure that the Replace Header with the initial request can be correctly replaced, and solve the impact of the existing 3GPP AS on the lack of Relpace parameter support.
- the present invention provides a replacement method of a Replace parameter, which is applied to an IP Multimedia Subsystem (IMS), and the method includes:
- the application server which is a Route Back B2BUA or Initiating B2BUA, receives an initial request for a dialog, and the initial filtering of the sender user of the initial request is modified.
- Rule (iFC) or modify the iFC of the recipient user of the initial request, or modify the iFC of the service-related user of the recipient.
- the user includes all public user identities (PUIs) corresponding to the user's private user identity (PVI), or user aliases (alias).
- PVI public user identity
- alias user aliases
- the step of modifying the iFC by the AS includes:
- HSS Home Subscriber Server
- S-CSCF Call Session Control Function
- the HSS and the iFC in the S-CSCF are modified by the AS.
- the S-CSCF is an S-CSCF of the receiver user of the initial request
- the HSS is an HSS of the receiver user of the initial request
- the S-CSCF is an S-CSCF of a service-related user of the receiver of the initial request
- the HSS is the HSS of the service-related user of the recipient of the initial request.
- the modifying the iFC includes: adding a trigger rule and placing the head of the iFC trigger sequence;
- the service point trigger (Service Point Trigger) of the triggering rule is specifically: if the sender user who receives the second initial request is the receiver user of the initial request, or the service related user of the receiver,
- the dialog identifier (Dialog ID) of the replacement header is the Dialog ID of the outgoing call side of the AS in the initial request. , the AS is triggered.
- the S-CSCF is an S-CSCF of the sender user of the initial request
- the HSS is an HSS of a sender user of the initial request.
- the modifying the iFC includes: adding a trigger rule and placing the head of the iFC trigger sequence;
- the service point trigger (Service Point Trigger) of the triggering rule is specifically: if the receiver user receiving the second initial request is the sender user of the initial request, and the second initial request has a replacement header (Replace Header), if the dialog identifier (Dialog ID) of the replacement header is the Dialog ID of the outgoing side of the AS in the initial request, the AS is triggered.
- the method further includes: when the S-CSCF receives the second initial request, triggering the AS according to the modified iFC.
- the method further includes: after the session ends, the AS restores the modified iFC to the original iFC.
- the modification to the iFC includes: adding a trigger rule of the current AS according to the first sequence, and placing the trigger rule in the iFC trigger sequence The leader of the team, so that the trigger rules corresponding to the multiple ASs added by the modified head of the iFC are arranged in the reverse order of the first sequence.
- the present invention also provides a replacement system for a Replace parameter, which is applied to an IMS, the system includes an AS that performs B2BUA behavior, and the AS includes a modified iFC unit, where:
- the modifying the iFC unit is configured to: tamper with the iFC of the sender user of the initial request when the AS receives the initial request for a dialog as the Routeing B2BUA or the Initiating B2BUA, or modify the The iFC of the recipient user of the initial request, or the iFC of the service-related user of the recipient.
- the system also includes an HSS,
- the modifying the iFC unit is configured to: modify the iFC in the HSS, and instruct the HSS to modify the iFC in the S-CSCF; or modify the HSS and the iFC in the S-CSCF;
- the HSS is set to: modify the iFC in the S-CSCF according to the indication of the modified iFC unit.
- the S-CSCF is an S-CSCF of the receiver user of the initial request
- the HSS is an HSS of the receiver user of the initial request; or
- the S-CSCF is an S-CSCF of a service-related user of the receiver of the initial request
- the HSS is an HSS of a service-related user of the receiver of the initial request
- the modification to the iFC includes: adding a trigger rule and placing the leader of the iFC trigger sequence;
- the service point trigger (Service Point Trigger) of the triggering rule is: if the sender user receiving the second initial request is the receiver user of the initial request, or the service related user of the receiver, and the second When the initial request has a Replace Header, if the dialog identifier (Dialog ID) of the replacement header is the Dialog ID of the outgoing call of the AS in the initial request, the AS.
- the S-CSCF is the S-CSCF of the sender user of the initial request
- the HSS is the HSS of the sender user of the initial request
- the modification to the iFC includes: adding a trigger rule and placing the leader of the iFC trigger sequence;
- the service point trigger (Service Point Trigger) of the trigger rule is: if the receiver user receiving the second initial request is the sender user of the initial request, and the second initial request has a replacement header ( When Replace Header ), if the replacement header has a dialog identifier (Dialog ID) The AS is triggered for the Dialog ID of the outgoing party of the AS in the initial request.
- the modifying the iFC unit is further configured to: after the session ends, restore the modified iFC to the original iFC.
- FIG. 1 is a schematic diagram of an AS performing B2BUA behavior
- FIG. 2 is a schematic diagram of a plurality of AS performing B2BUA behaviors (the new initial request acceptance S-CSCF is the same as the original S-CSCF);
- FIG. 3 is a plurality of AS performing B2BUA Schematic diagram of the behavior (the new initial request acceptance S-CSCF is different from the original S-CSCF);
- FIG. 4 is a schematic flow chart of the application example of the present invention;
- FIG. 5 is a schematic flowchart of another application example of the present invention.
- the preferred embodiment of the present invention solves the problems in the prior art.
- the idea of the present invention is as follows: Referring to FIG. 2 and FIG. 3, for a new initial request (ie, the initial request of Dialog3 in the figure, hereinafter also referred to as second Initial request), AS1 that performs B2BUA behavior is not necessarily a network element, and even the S-CSCF (Serving-Call Session Control Function) that accepts the initial request of Dialog3 is not the original S-CSCF (accepted Dialogl and Dialog2's S-CSCF), because the I-CSCF can choose different S-CSCF calls (such as S-CSCF2). Therefore, even the selection of the original S-CSCF as a Replace Header Dialog ID replacement does not solve the problem.
- S-CSCF Server-Call Session Control Function
- a user who initiates a new call request (Dialog4) is often the same user as the user who accepts the Dialog3 request, or has a business relationship with the user. Other users, therefore, the user who initiates a new call request generally includes the following: 1) all public user identity (PUI) corresponding to the user's private user identity (PVI); 2) the user alias (alias); Other users who have business relationships with users.
- PKI public user identity
- PVI public user identity
- alias alias
- the present invention provides an AS replacement method for the Replace parameter, which is applied to the IP multimedia subsystem.
- the technical solution adopted by the method is as follows:
- the AS that performs the B2BUA behavior as the Routeing B2BUA or the Initiating B2BUA receives the Dialog.
- the initial request, the initial filtering rule (iFC) of the sender user of the initial request is modified, or the iFC of the recipient user of the initial request is modified, or the iFC of the service-related user of the recipient is modified.
- the user includes all public user identities (PUIs) corresponding to the user's private user identity (PVI), or user aliases (alias).
- PVI public user identity
- alias user aliases
- the modifying the iFC by the AS specifically includes: modifying, by the AS, an iFC in a home subscriber server (HSS), and modifying an iFC in a call session control function (S-CSCF) by using the HSS; or, by the AS Modifying the HSS and the iFC in the S-CSCF.
- HSS home subscriber server
- S-CSCF call session control function
- the S-CSCF is the S-CSCF of the sender user of the initial request
- the HSS is the sender user of the initial request.
- the modification of the iFC is specifically: adding a trigger rule and placing the head of the iFC trigger sequence;
- the service point trigger (Service Point Trigger) of the trigger rule is specifically: receiving the second initial request
- the party user is the sender user of the initial request
- the dialog identifier (Dialog ID) of the replacement header is the Dialog ID of the outgoing call side of the AS in the initial request. , the AS is triggered.
- the S-CSCF is the S-CSCF of the receiver user of the initial request
- the HSS is an HSS of the recipient user of the initial request
- the S-CSCF is an S-CSCF of a service-related user of the receiver of the initial request
- the HSS is a receiving of the initial request
- the HSS of the service-related user of the party is: the modification of the iFC is specifically: adding a trigger rule and placing the head of the iFC trigger sequence; the service point trigger (Service Point Trigger) of the trigger rule is specifically: If the sender user of the second initial request is the recipient user of the initial request, or the service related user of the receiver, and the second initial request has a replacement header (Replace Header), if the replacement header
- the dialog identifier (Dialog ID) is the Dialog ID of the outgoing call of the AS in the initial request, and the AS is triggered.
- the AS When the S-CSCF receives the second initial request, the AS is triggered according to the modified iFC. Thus, since the iFC is modified, even if the S-CSCF accepting Dialog3 is not the original S-CSCF, but another S-CSCF, according to the modified iFC, the second initial request accepting the S-CSCF may perform the B2BUA behavior.
- the AS triggers and performs a Replace Header Dialog ID replacement.
- modifying the iFC is specifically: adding a trigger rule of the current AS according to the first sequence, and placing the iFC on the iFC
- the triggering rule of the plurality of ASs added by the modified head of the modified iFC is arranged in the reverse order of the first sequence.
- AS1 receives the initial request from Dialog1, performs the B2BUA action, replaces Dialog1 with Dialog2, modifies iFC, adds the trigger rule of AS1 and places it in the head of the iFC trigger sequence;
- AS2 receives Dialog2's initial request, perform B2BUA behavior, replace Dialog2 with Dialog3, and modify iFC, add AS2 trigger rules and place them in the head of the iFC trigger sequence.
- S-CSCF2 receives the initial request of Dialog4.
- the Dialog ID parameter in the Replace Header of the initial request is Dialog3.
- AS2 will be triggered first.
- AS2 continues to use Dialog4 to forward the initial request;
- S-CSCF2 will trigger AS1 according to the current iFC.
- AS1 triggers, replace the Dialog ID in Replace Header with Dialog2 from Dialog2, and continue to use Dialog4 to forward the request. Therefore, when there are multiple ASs performing B2BUA behavior, the order in which these ASs are triggered is exactly the opposite of the order in which the Dialog1 -Dialog2 direction triggers these ASs.
- the Replace Header can be correctly and completely replaced.
- the AS restores the modified iFC to the original iFC.
- the AS that performs the B2BUA behavior modifies the iFC of the receiver of the initial request.
- Step 1 UE-A initiates a Dialog to UE-B.
- the initial request is as follows: INVITE, Dialog ID is D1; Step 2, S-CSCF1 of UE-A sends the INVITE request to B2BUA AS1; Step 3, AS1 modifies iFC, specifically: Add AS1 trigger rule and Placed on current iFC
- the service point trigger (Service Point Trigger) of the triggering rule is specifically: if the sender that receives the second initial request is the receiver user of the initial request, or the service related user of the receiver ,
- the second initial request has a replacement header (Change Header), if the dialog identifier (Dialog ID) of the replacement header is the Dialog ID of the outgoing party of the AS1 in the initial request (ie, D2) ), then trigger AS1.
- the iFC modified by AS1 includes: an S-CSCF (ie, S-CSCF2) that modifies the receiver of the initial request (ie, UE-B), and an HSS of the receiver of the initial request (ie, UE-B); or, UE The S-CSCF of the alias of -B, and the HSS of the alias of UE-B; or the S-CSCF of the service-related user of UE-B, and the iFC of the HSS of the service-related user of UE-B.
- the iFC in the above HSS may be modified by the AS1, and the iFC in the corresponding S-CSCF may be modified by the HSS described above (the S-CSCF queries and downloads the user iFC from the HSS when the user registers,) specifically
- the iFC stored in the HSS can be modified by the Sh interface, and the HSS can be modified to modify the iFC that has been downloaded on the S-CSCF.
- the HSS and the iFC in the corresponding S-CSCF can be modified by AS1, where AS1 can pass A new interface with the S-CSCF, modifying the iFC that has been downloaded on the S-CSCF.
- Step 4 AS1 performs B2BUA behavior, replaces Dialog ID with D1 to D2, and forwards the INVITE request to S-CSCF2 of UE-B.
- Step 5 S-CSCF2 forwards the INVITE request to UE-B;
- Step 6-9 According to the existing standard, the UE-B sends a 200 OK message, which is sequentially forwarded to the UE-A through the S-CSCF2, the AS1, and the S-CSCF1, where the AS1 replaces D2 with D1;
- -A returns an ACK (Acknowledgement) message, which is then forwarded to UE-B via S-CSCF1, AS1 and S-CSCF2 (ie, in the direction indicated by the arrow in the figure), where AS1 is reached upon arrival at AS1 Replacing D1 with D2;
- the media link is established between the UE-A and the UE-B through the RTP (Real-time Transport Protocol) media stream;
- Step 10 UE-B initiates a conference invite
- Step 14 UE-B sends a transfer request (Refer) with a Replace header, and the Dialog ID of the Replace header is D2;
- Step 15 the S-CSCF2 forwards the Refer request to the Conf AS;
- Step 16 the S-CSCF2 receives the INVITE request, according to the current iFC, conforms to the trigger rule of AS 1.
- the sender user who receives the second initial request is the service-related user of the receiver of the initial request (ie, UE-B) (where the Conf AS is the service-related user of the UE-B;); and the INVITE
- the request has a Replace header, the Dialog ID of the Replace header is D2, which triggers AS1; Step 18, S-CSCF2 forwards the INVITE request to AS1; Step 19, AS 1 Dialog ID of the Replace header carried by the INVITE request Replaced with D2 and forwarded to S-CSCF1; Step 20, S-CSCF1 forwards the received INVITE request to UE-A.
- the present example is described by taking the service-related user of the receiver of the initial request as an example, but it is not limited to the case.
- the technical solution of the present invention is the same for the recipient user itself or the alias of the receiver. Be applicable.
- Step 3 AS1 modifies the iFC, specifically: Add the trigger rule of AS1 and place it on the current iFC trigger sequence.
- the service point trigger (Service Point Trigger) of the triggering rule is specifically: if the receiver user receiving the second initial request is the sender user of the initial request, and the second initial request is replaced by In the case of a Replace Header, if the dialog identifier (Dialog ID) of the replacement header is the Dialog ID (D2) of the outgoing call of the AS in the initial request, the AS is triggered.
- the iFC modified by AS1 includes: an S-CSCF (ie, S-CSCF1) of the sender of the initial request (ie, UE-A), and an iFC in the HSS of the sender of the initial request (ie, UE-A).
- the iFC in the above HSS may be modified by the AS1, and the iFC in the corresponding S-CSCF may be modified by the HSS described above (the S-CSCF queries and downloads the user iFC from the HSS when the user registers,) specifically
- the iFC stored in the HSS can be modified by the Sh interface, and the HSS can be modified to modify the iFC that has been downloaded on the S-CSCF.
- the HSS and the iFC in the corresponding S-CSCF can be modified by AS1, where AS1 can pass A new interface with the S-CSCF, modifying the iFC that has been downloaded on the S-CSCF.
- Step 17 The S-CSCF2 receives the INVITE request, according to the current iFC, conforms to the triggering rule of AS 1, that is, the receiver that receives the second initial request (INVITE request) is the sender of the initial request (UE-A);
- the INVITE request has a Replace header, and the Dialog ID of the Replace header is D2, which triggers AS1.
- the other operation steps of the example process are basically the same as those in the example shown in FIG. 4, and the same or similar methods are not repeatedly described herein.
- the application server that accepts the new initial request (INVITE) in step 16 is no longer AS1 but Conf AS, so if according to the prior art, the new initial request will not be triggered at all.
- the embodiment of the present invention further provides a system for replacing a Replace parameter of an AS, which is applied to an AS that performs B2BUA behavior in an IMS, where the system includes modifying an iFC unit, where: the modified iFC unit is used to When the AS receives the initial request for a dialog as the Routeing B2BUA or the Initiating B2BUA, tampering with the iFC of the sender user of the initial request, or modifying the iFC of the recipient user of the initial request, Or modify the iFC of the service related user of the recipient.
- the system further includes an HSS, the modified iFC unit is configured to: modify the iFC in the HSS, and instruct the HSS to modify the iFC in the S-CSCF; or modify the HSS and the iFC in the S-CSCF;
- the HSS is configured to modify an iFC in the S-CSCF according to the indication of the modified iFC unit.
- the S-CSCF is an S-CSCF of a receiver user of the initial request
- the HSS is an HSS of a receiver user of the initial request
- the S-CSCF is a receiver of the initial request.
- the service-related user's S-CSCF, and the HSS is the HSS of the service-related user of the receiver of the initial request; modifying the iFC is specifically: adding a trigger rule and placing the head of the iFC trigger sequence;
- the service point trigger (Service Point Trigger) of the triggering rule is specifically: if the sender user who receives the second initial request is the receiver user of the initial request, or the service related user of the receiver, and the When the initial request has a replacement header (Change Header), if the dialog identifier (Dialog ID) of the replacement header is the Dialog ID of the outgoing call of the AS in the initial request, the trigger is triggered.
- Said AS Said AS.
- the S-CSCF is the S-CSCF of the sender user of the initial request
- the HSS is the HSS of the sender user of the initial request
- modifying the iFC is specifically: adding a trigger rule and placing the The head of the iFC trigger sequence
- the service point trigger (Service Point Trigger) of the triggering rule is specifically: if the receiver user receiving the second initial request is the sender user of the initial request, and the second initial request has a replacement header (Replace Header), if the dialog identifier (Dialog ID) of the replacement header is the Dialog ID of the outgoing destination of the AS in the initial request, the AS is triggered.
- the modified iFC unit is further configured to restore the modified iFC to the original iFC after the session ends.
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Abstract
本发明公开了一种替换参数的替换方法和系统,应用于IMS,所述方法包括:作为RouteingB2BUA或InitiatingB2BUA的应用服务器(AS)收到对话的初始请求,修改所述初始请求的发送方用户的初始过滤规则(iFC),或修改所述初始请求的接收方用户的iFC,或修改所述接收方的业务相关用户的iFC。应用本发明,可以保证将新的初始请求触发到AS,实现替换头部的正确替换。
Description
替换参数的替换方法及系统
技术领域 本发明涉及通信技术领域,尤其涉及一种 IP多媒体子系统( IP Multimedia Subsystem, IMS ) 中, 应用服务器对 Replace参数的替换方法及系统。
背景技术
第三代合作伙伴计划( 3rd Generation Partner Project, 3GPP )定义应用服 务器( Application Server, AS )在处理会话发起协议( Session Initiation Protocol, SIP )消息时,行为模式可以为代理( Proxy )、路由背靠背用户代理( Routeing Back to Back User Agent, Routeing B2BUA )或初始背靠背用户代理( Initiating B2BUA )。 其中 Routeing B2BUA是一种 4艮类似 Proxy的处理模式, 当 AS釆 用 Routeing B2BUA或 Initiating B2BUA行为模式时, AS两侧的会话标识 ( Dialog ID )经由 AS修改, AS两侧的 Dialog ID将不一样。 按照 3GPP 24.229 5.7.5章节的定义, 当 IMS中的 AS收到带有替换头部 ( Replace Header )的对话的初始请求( Initial request for a dialog )时, 需要检 查 AS是否为 Routeing B2BUA或 Initiating B2BUA行为模式。 如果是, 并且 此 AS就是 Replace Header所携带的 Dialog ID的替换者, 则需要在转发此初 始请求前将 Replace Header的 Dialog ID替换。 替换的目的是, 在此 AS前向 的网元只能识别 Dialogl , 无法识别 Dialog2 , 必须由进行 Dialog替换的网元 (此 Routeing B2BUA AS ) 。 具体流程参见图 1 , 针对 Dialogl的请求, AS作为 Routeing B2BUA或 Initiating B2BUA执行 B2BUA行为,使用新的 Dialog2转发请求。 当收到新的 初始请求(使用 Dialog3 ) , 且携带有 Replace Header为 Dialog2时, AS需要 将 Replace Header修改为 Dialogl转发。 转发该请求的 Dialog可以继续使用 Dialog3 , 也可以使用新的 Dialog ID ( Dialog4 ) 。 现有技术中存在如下问题: 3GPP只是定义了 AS收到此类请求后的处理, 但是在实际应用时, Dialog3的初始请求可能并不会送到此 AS, 导致后续网
元无法识别 Replace Header的 Dialog ID(如图 1中的 Dialogl )。根据 RFC3891 , 无法识别 /匹配 Replace Header的 Dialog ID, 接受方可以使用 481拒绝请求。 因此, 需要提供一种解决方案, 保证新的初始请求, 如果携带有 Replace Header,并且 Replace Header所带的 Dialog ID曾经被 B2BUA行为模式的 AS 替换, 则该 Dialog ID可以在被送到前向网元的过程中被重新正确替换, 以保 证 Replace Header可以被正确处理。
发明内容 本发明要解决的技术问题是提供一种 Replace参数的替换方法及系统, 保证初始请求带有的 Replace Header可以被正确替换, 解决现有 3GPP AS对 Relpace参数支持的欠缺带来的影响。
为了解决上述问题, 本发明提供了一种 Replace参数的替换方法, 应用 于 IP多媒体子系统( IMS ) , 所述方法包括:
作为路由背靠背用户代理 (Routeing B2BUA ) 或初始背靠背用户代理 ( Initiating B2BUA )的应用服务器( AS )收到对话的初始请求( Initial request for a dialog ) , 修改所述初始请求的发送方用户的初始过滤规则 ( iFC ) , 或 修改所述初始请求的接收方用户的 iFC, 或修改所述接收方的业务相关用户 的 iFC。
其中, 所述用户包括用户私有用户身份( PVI )对应的所有公共用户身份 ( PUI ) , 或用户别名(alias)。
其中, 所述 AS修改所述 iFC的步骤包括:
由所述 AS修改归属用户服务器(HSS )中的 iFC, 并通过所述 HSS修改 呼叫会话控制功能(S-CSCF ) 中的 iFC; 或者,
由所述 AS修改所述 HSS及所述 S-CSCF中的 iFC。
其中, 所述 S-CSCF 为所述初始请求的接收方用户的 S-CSCF, 且所述 HSS为所述初始请求的接收方用户的 HSS; 或者,
所述 S-CSCF为所述初始请求的接收方的业务相关用户的 S-CSCF, 且所
述 HSS为所述初始请求的接收方的业务相关用户的 HSS。
其中, 对所述 iFC的修改包括: 增加触发规则并放置于所述 iFC触发序 列的队首;
所述触发规则的业务点触发器( Service Point Trigger )具体为: 若收到第二初始请求的发送方用户为所述初始请求的接收方用户, 或接 收方的业务相关用户,
且所述第二初始请求带有替换头部( Replace Header )时, 若所述替换头 部的对话标识( Dialog ID )为所述 AS在所述初始请求中出呼侧 ( outgoing ) 的 Dialog ID , 则触发所述 AS。
其中, 所述 S-CSCF 为所述初始请求的发送方用户的 S-CSCF, 且所述 HSS为所述初始请求的发送方用户的 HSS。
其中, 对所述 iFC的修改包括: 增加触发规则并放置于所述 iFC触发序 列的队首;
所述触发规则的业务点触发器( Service Point Trigger )具体为: 若收到第二初始请求的接收方用户为所述初始请求的发送方用户, 且所述第二初始请求带有替换头部( Replace Header )时, 若所述替换头 部的对话标识( Dialog ID )为所述 AS在所述初始请求中出呼侧 ( outgoing ) 的 Dialog ID , 则触发所述 AS。
上述方法还包括: 所述 S-CSCF收到第二初始请求时, 根据修改后的 iFC 触发所述 AS。
上述方法还包括: 所述对话结束后, 所述 AS将所述修改后的 iFC恢复 为原 iFC。
其中, 若所述初始请求按第一序列经过多个执行 B2BUA行为的 AS时, 对所述 iFC的修改包括:按照所述第一序列,增加当前 AS的触发规则并放置 于所述 iFC触发序列的队首,使修改后的 iFC的队首所增加的多个 AS对应的 触发规则按照所述第一序列的逆序排列。
本发明还提供了一种 Replace参数的替换系统, 应用于 IMS中, 所述系 统包括执行 B2BUA行为的 AS , 所述 AS包括修改 iFC单元, 其中:
所述修改 iFC单元设置为: 当所述 AS作为 Routeing B2BUA或 Initiating B2BUA收到对话的初始请求(Initial request for a dialog ) 时, 爹改所述初始 请求的发送方用户的 iFC, 或修改所述初始请求的接收方用户的 iFC, 或修改 所述接收方的业务相关用户的 iFC。
所述系统还包括 HSS,
所述修改 iFC单元是设置为: 修改 HSS中的 iFC, 并指示所述 HSS修改 S-CSCF中的 iFC; 或者, 修改所述 HSS及所述 S-CSCF中的 iFC;
所述 HSS设置为: 根据所述修改 iFC单元的指示修改 S-CSCF中的 iFC。 其中, 所述 S-CSCF 为所述初始请求的接收方用户的 S-CSCF, 且所述 HSS为所述初始请求的接收方用户的 HSS; 或者,
所述 S-CSCF为所述初始请求的接收方的业务相关用户的 S-CSCF, 且所 述 HSS为所述初始请求的接收方的业务相关用户的 HSS;
对所述 iFC的修改包括: 增加触发规则并放置于所述 iFC触发序列的队 首;
所述触发规则的业务点触发器( Service Point Trigger )为: 若收到第二初 始请求的发送方用户为所述初始请求的接收方用户, 或接收方的业务相关用 户, 且所述第二初始请求带有替换头部( Replace Header )时, 若所述替换头 部的对话标识( Dialog ID )为所述 AS在所述初始请求中出呼侧 ( outgoing ) 的 Dialog ID , 则触发所述 AS。
其中, 所述 S-CSCF 为所述初始请求的发送方用户的 S-CSCF, 且所述 HSS为所述初始请求的发送方用户的 HSS;
对所述 iFC的修改包括: 增加触发规则并放置于所述 iFC触发序列的队 首;
所述触发规则的业务点触发器( Service Point Trigger )为: 若收到第二初 始请求的接收方用户为所述初始请求的发送方用户, 且所述第二初始请求带 有替换头部 ( Replace Header ) 时, 若所述替换头部的对话标识(Dialog ID )
为所述 AS在所述初始请求中出呼侧 (outgoing ) 的 Dialog ID, 则触发所述 AS。
其中, 所述修改 iFC单元还设置为: 所述对话结束后, 将所述修改后的 iFC恢复为原 iFC。
附图概述 图 1为 AS执行 B2BUA行为的示意图; 图 2为多个 AS执行 B2BUA行为的示意图(新的初始请求的受理 S-CSCF 与原 S-CSCF相同 ) ; 图 3为多个 AS执行 B2BUA行为的示意图(新的初始请求的受理 S-CSCF 与原 S-CSCF不同) ; 图 4为本发明应用实例的方法流程示意图; 图 5为本发明另一应用实例的方法流程示意图。
本发明的较佳实施方式 为解决现有技术中存在的问题, 本发明的思路如下: 参见图 2和图 3 , 对于新的初始请求(即图中 Dialog3的初始请求, 以下 也称作第二初始请求) , 执行 B2BUA行为的 AS1并不是必经网元, 甚至受 理 Dialog3的初始请求的 S-CSCF ( Serving- Call Session Control Function, 服 务呼叫会话控制功能)也不是原 S-CSCF(受理 Dialogl与 Dialog2的 S-CSCF ), 因为 I-CSCF可以选择不同的 S-CSCF受理(如 S-CSCF2 )。 因此, 即使是选 择原 S-CSCF作 Replace Header的 Dialog ID替换也并不能解决问题。 因此, 最好由进行 Dialogl、 Dialog2替换的 AS进行 Replace Header的 Dialog ID替换更合适。 此外, 在实际应用中, 以图 3 为例, 发起新的呼叫请求 (Dialog4)的用户 与接受 Dialog3请求的用户往往是同一个用户,或者与该用户有业务关系的其
他用户, 因此, 发起新的呼叫请求的用户一般包括以下情况: 1 )该用户私有 用户身份(PVI )对应的所有公共用户身份(PUI ); 2 )该用户别名(alias); 3 ) 与该用户有业务关系的其他用户。
基于以上思路, 本发明提供一种 AS对 Replace参数的替换方法, 应用于 IP多媒体子系统, 该方法釆用的技术方案具体描述如下: 作为 Routeing B2BUA或 Initiating B2BUA执行 B2BUA行为的 AS收到 Dialog的初始请求,修改所述初始请求的发送方用户的初始过滤规则( iFC ) , 或修改所述初始请求的接收方用户的 iFC, 或修改所述接收方的业务相关用 户的 iFC。
其中, 所述用户包括用户私有用户身份( PVI )对应的所有公共用户身份 ( PUI ) , 或用户别名(alias)。
所述 AS修改所述 iFC具体包括: 由所述 AS修改归属用户服务器(HSS )中的 iFC, 并通过所述 HSS修改 呼叫会话控制功能(S-CSCF ) 中的 iFC; 或者, 由所述 AS修改所述 HSS及所述 S-CSCF中的 iFC。
当所述 AS修改所述初始请求的发送方用户的 iFC时, 所述 S-CSCF为所述初始请求的发送方用户的 S-CSCF,且所述 HSS为所 述初始请求的发送方用户的 HSS; 修改所述 iFC具体为: 增加触发规则并放置于所述 iFC触发序列的队首; 所述触发规则的业务点触发器( Service Point Trigger )具体为: 若收到第二初始请求的接收方用户为所述初始请求的发送方用户,
且所述第二初始请求带有替换头部( Replace Header )时, 若所述替换头 部的对话标识( Dialog ID )为所述 AS在所述初始请求中出呼侧 ( outgoing ) 的 Dialog ID , 则触发所述 AS。
当所述 AS修改所述初始请求的接收方用户的 iFC,或修改所述接收方的 业务相关用户的 iFC时, 所述 S-CSCF为所述初始请求的接收方用户的 S-CSCF,且所述 HSS为所 述初始请求的接收方用户的 HSS; 或者, 所述 S-CSCF为所述初始请求的接收方的业务相关用户的 S-CSCF, 且所 述 HSS为所述初始请求的接收方的业务相关用户的 HSS; 修改所述 iFC具体为: 增加触发规则并放置于所述 iFC触发序列的队首; 所述触发规则的业务点触发器( Service Point Trigger )具体为: 若收到第二初始请求的发送方用户为所述初始请求的接收方用户, 或接 收方的业务相关用户, 且所述第二初始请求带有替换头部( Replace Header )时, 若所述替换头 部的对话标识( Dialog ID )为所述 AS在所述初始请求中出呼侧 ( outgoing ) 的 Dialog ID , 则触发所述 AS。
上述 S-CSCF收到第二初始请求时, 根据修改后的 iFC触发所述 AS。 这样,由于修改了 iFC,即使受理 Dialog3的 S-CSCF不是原来的 S-CSCF, 而是另一个 S-CSCF, 根据已经修改的 iFC, 第二初始请求的受理 S-CSCF可 以将进行过 B2BUA行为的 AS触发, 并执行 Replace Header的 Dialog ID替 换。
若所述初始请求按第一序列经过多个执行 B2BUA行为的 AS时,修改所 述 iFC具体为:按照所述第一序列,增加当前 AS的触发规则并放置于所述 iFC
触发序列的队首,使修改后的 iFC的队首所增加的多个 AS对应的触发规则按 照所述第一序列的逆序排列。 如图 3所示,某个 IMS呼叫中, AS1收到 Dialogl的初始请求,执行 B2BUA 行为将 Dialogl替换为 Dialog2,修改 iFC,增加 ASl的触发规则并放置于 iFC 触发序列的队首; AS2收到 Dialog2的初始请求,执行 B2BUA行为将 Dialog2 替换为 Dialog3 , 并修改 iFC , 增加 AS2的触发规则并放置于 iFC触发序列的 队首。
后续 S-CSCF2收到 Dialog4的初始请求, 该初始请求的 Replace Header 中的 Dialog ID参数为 Dialog3 , 则根据修改的 iFC, 将首先触发 AS2, AS2 触发后, 将 Replace Header中的 Dialog ID由 Dialog3替换为 Dialog2, AS2继 续使用 Dialog4转发该初始请求; S-CSCF2根据当前的 iFC,将触发 ASl , ASl 触发后,将 Replace Header中的 Dialog ID由 Dialog2替换为 Dialogl后,继续 使用 Dialog4转发该请求。 因此, 当有多个 AS进行过 B2BUA行为时, 这些 AS被触发的顺序与 Dialogl -Dialog2方向触发这些 AS的顺序刚好相反,这样经过逆向的替换, 刚 好可以将 Replace Header正确并完全替换。 当所述对话结束后, 所述 AS将所述修改后的 iFC恢复为原 iFC。
下面将结合附图及具体实例对本发明技术方案的实施作进一步详细描 述。 实例一
本实例中, 执行 B2BUA行为的 AS修改初始请求的接收方的 iFC , 参见 图 4, 本实例的 AS对 Replace参数的替换方法流程具体描述如下: 步骤 1 , UE-A发起向 UE-B的 Dialog的初始请求如邀请请求( INVITE ) , Dialog ID为 Dl ; 步骤 2, UE-A的 S-CSCF1将该 INVITE请求发送至 B2BUA ASl ; 步骤 3 , ASl修改 iFC, 具体为: 增加 AS1的触发规则并放置于当前 iFC
触发序列的队首; 所述触发规则的业务点触发器( Service Point Trigger )具体为: 若收到第 二初始请求的发送方为所述初始请求的接收方用户, 或接收方的业务相关用 户,
且所述第二初始请求带有替换头部( Replace Header )时, 若所述替换头 部的对话标识(Dialog ID )为 AS1在上述初始请求中出呼侧 (outgoing ) 的 Dialog ID (即 D2 ) , 则触发 AS1。 其中 AS1修改的 iFC包括: 修改上述初始请求的接收方 (即 UE-B ) 的 S-CSCF (即 S-CSCF2 ) , 及上述初始请求的接收方 (即 UE-B ) 的 HSS; 或 者, UE-B的别名的 S-CSCF, 及 UE-B的别名的 HSS; 或者, UE-B的业务相 关用户的 S-CSCF, 及 UE-B的业务相关用户的 HSS中的 iFC。 在修改 iFC时,可以由 AS1修改上述的 HSS中的 iFC,并通过上述的 HSS 修改相应 S-CSCF中的 iFC ( S-CSCF在用户注册的时候, 从 HSS查询并下载 用户 iFC ) ,具体地,可通过 Sh接口修改 HSS上存储的相关 iFC,并触发 HSS 修改 S-CSCF上已经下载的 iFC; 或者, 也可以由 AS1修改上述的 HSS及相应 S-CSCF中的 iFC, 其中, AS1可通过与 S-CSCF之间的新增接口, 修改 S-CSCF上已经下载的 iFC。 步骤 4 , AS1执行 B2BUA行为,将 Dialog ID由 D1替换为 D2 ,并将 INVITE 请求转发到 UE-B的 S-CSCF2; 步骤 5, S-CSCF2 将 INVITE请求转发到 UE-B; 步骤 6-9, 按照现有标准, UE-B发送 200 OK消息, 该 200 OK消息依次 经过 S-CSCF2、 AS1和 S-CSCF1转发到 UE-A, 其中在到达 AS1时, 由 AS1 将 D2替换为 Dl ; UE-A返回 ACK (确认) 消息, 该 ACK消息依次经过 S-CSCF1、 AS1和 S-CSCF2转发到 UE-B (即按照图中箭头所示方向的反向 ) , 其中在到达 AS1时, 由 AS1将 D1替换为 D2; 完成上述步骤后, UE-A和 UE-B 之间通过 RTP ( Real-time Transport Protocol, 实时传输协议)媒体流建立媒体链接;
步骤 10, UE-B发起会议邀请请求( INVITE Conf) ; 步骤 11 , S-CSCF2将 INVITE Conf请求发送到会议服务器( Conf AS ); 步骤 12-13 ,按照现有标准, Conf AS通过 S-CSCF2与 UE-B之间进行 200
OK和 ACK消息流程, 该过程为现有流程, 在此不再详细赘述。 完成上述步骤后, UE-B和 Conf AS之间将建立媒体链接。 步骤 14, UE-B发送转移请求(Refer ) , 带有 Replace头部, Replace头 部的 Dialog ID为 D2; 步骤 15, S-CSCF2转发该 Refer请求到 Conf AS; 步骤 16, 按照现有标准, Conf AS收到 Refer请求后, 将发起 INVITE请 求, 携带 Replace头部, 且 Replace头部的 Dialog ID为 D2; 步骤 17, S-CSCF2收到 INVITE请求, 根据当前 iFC, 符合 AS 1的触发 规则, 即收到第二初始请求( INVITE请求)的发送方用户为前述初始请求的 接收方(即 UE-B )的业务相关用户(此处 Conf AS为 UE-B的业务相关用户;); 且 INVITE请求中带有 Replace头部, Replace头部的 Dialog ID为 D2 , 则触 发 AS1 ; 步骤 18, S-CSCF2将 INVITE请求转发到 AS1 ; 步骤 19 , AS 1将 INVITE请求携带的 Replace头部的 Dialog ID替换为 D2 , 并转发到 S-CSCF1 ; 步骤 20 , S-CSCF1将收到的 INVITE请求转发给 UE-A。 需要说明的是, 本实例是以初始请求的接收方的业务相关用户为例进行 描述, 但不并仅限于这种情况, 本发明技术方案对于接收方用户本身, 或接 收方的别名的情况同样适用。
实例二
本实例与图 4 所示实例流程的主要区别在于, 本实例中, 执行 B2BUA 行为的 AS修改初始请求的发送方的 iFC。
现将本实例的 AS对 Replace参数的替换方法流程与图 4所示流程有区别 的步骤列举如下: 步骤 3 , AS1修改 iFC, 具体为: 增加 AS1的触发规则并放置于当前 iFC 触发序列的队首; 所述触发规则的业务点触发器( Service Point Trigger )具体为: 若收到第 二初始请求的接收方用户为所述初始请求的发送方用户, 且所述第二初始请求带有替换头部( Replace Header )时, 若所述替换头 部的对话标识( Dialog ID )为所述 AS在所述初始请求中出呼侧 ( outgoing ) 的 Dialog ID ( D2 ) , 则触发所述 AS。 其中 AS1修改的 iFC包括:上述初始请求的发送方(即 UE-A )的 S-CSCF (即 S-CSCF1 ) , 及上述初始请求的发送方 (即 UE-A ) 的 HSS中的 iFC。 在修改 iFC时,可以由 AS1修改上述的 HSS中的 iFC,并通过上述的 HSS 修改相应 S-CSCF中的 iFC ( S-CSCF在用户注册的时候, 从 HSS查询并下载 用户 iFC ) ,具体地,可通过 Sh接口修改 HSS上存储的相关 iFC,并触发 HSS 修改 S-CSCF上已经下载的 iFC; 或者, 也可以由 AS1修改上述的 HSS及相应 S-CSCF中的 iFC, 其中, AS1可通过与 S-CSCF之间的新增接口, 修改 S-CSCF上已经下载的 iFC。 步骤 17, S-CSCF2收到 INVITE请求, 根据当前 iFC, 符合 AS 1的触发 规则, 即收到第二初始请求( INVITE请求 )的接收方为前述初始请求的发送 方( UE-A ); 且 INVITE请求中带有 Replace头部, Replace头部的 Dialog ID 为 D2, 则触发 AS1。 除上述区别以外, 本实例流程其他操作步骤则与图 4所示实例中基本相 同, 在此不再对相同或者相似方法进行重复描述。 从上述流程可以看出, 受理步骤 16 中的新的初始请求(INVITE ) 的应 用服务器不再是 AS1 , 而是 Conf AS, 因此, 若根据现有技术, 该新的初始 请求根本不会触发到 AS1 , 因此, 步骤 19-20中, 将无法实现 Replace头部的 正确替换, 进而 S-CSCF1和 UE-A将无法识别 Replace头部的 Dialog ID。
釆用本发明技术方案后, 则可以保证将新的初始请求触发到 AS1 , 实现 Replace头部的正确替换。
相应地, 本发明实施例中还提供了一种 AS对 Replace参数的替换系统, 应用于 IMS中执行 B2BUA行为的 AS , 所述系统包括修改 iFC单元, 其中: 所述修改 iFC单元用于, 当所述 AS作为 Routeing B2BUA或 Initiating B2BUA收到对话的初始请求(Initial request for a dialog ) 时, 爹改所述初始 请求的发送方用户的 iFC, 或修改所述初始请求的接收方用户的 iFC, 或修改 所述接收方的业务相关用户的 iFC。 所述系统还包括 HSS, 所述修改 iFC单元用于,修改 HSS中的 iFC,并指示所述 HSS修改 S-CSCF 中的 iFC; 或者, 修改所述 HSS及所述 S-CSCF中的 iFC; 所述 HSS用于, 根据所述修改 iFC单元的指示修改 S-CSCF中的 iFC。 所述 S-CSCF为所述初始请求的接收方用户的 S-CSCF,且所述 HSS为所 述初始请求的接收方用户的 HSS; 或者, 所述 S-CSCF为所述初始请求的接收方的业务相关用户的 S-CSCF, 且所 述 HSS为所述初始请求的接收方的业务相关用户的 HSS; 修改所述 iFC具体为: 增加触发规则并放置于所述 iFC触发序列的队首; 所述触发规则的业务点触发器( Service Point Trigger )具体为: 若收到第 二初始请求的发送方用户为所述初始请求的接收方用户, 或接收方的业务相 关用户, 且所述第二初始请求带有替换头部( Replace Header )时, 若所述替 换头部的对话标识( Dialog ID )为所述 AS在所述初始请求中出呼侧( outgoing ) 的 Dialog ID , 则触发所述 AS。 所述 S-CSCF为所述初始请求的发送方用户的 S-CSCF,且所述 HSS为所 述初始请求的发送方用户的 HSS; 修改所述 iFC具体为: 增加触发规则并放置于所述 iFC触发序列的队首;
所述触发规则的业务点触发器( Service Point Trigger )具体为: 若收到第 二初始请求的接收方用户为所述初始请求的发送方用户, 且所述第二初始请 求带有替换头部( Replace Header )时,若所述替换头部的对话标识( Dialog ID ) 为所述 AS在所述初始请求中出呼侧 (outgoing ) 的 Dialog ID, 则触发所述 AS。 所述修改 iFC单元还用于, 所述对话结束后, 将所述修改后的 iFC恢复 为原 iFC。
以上所述仅为本发明优选实施例, 并不用于限制本发明, 对于本领域的 技术人员, 本发明可以有各种更改和变化。 凡在本发明精神和原则之内, 所 作的任何修改、 等同替换和改进等, 均包含在本发明的保护范围之内。
工业实用性
釆用本发明技术方案后, 则可以保证将新的初始请求触发到 AS, 实现 Replace头部的正确替换。
Claims
1、 一种替换参数的替换方法, 应用于 IP多媒体子系统(IMS ) , 所述方 法包括:
作为路由背靠背用户代理 (Routeing B2BUA ) 或初始背靠背用户代理 ( Initiating B2BUA )的应用服务器( AS )收到对话的初始请求( Initial request for a dialog ) , 修改所述初始请求的发送方用户的初始过滤规则 ( iFC ) , 或 修改所述初始请求的接收方用户的 iFC, 或修改所述接收方的业务相关用户 的 iFC。
2、 如权利要求 1所述的方法, 其中, 或用户别名(alias)。
3、 如权利要求 2所述的方法, 其中,
所述 AS修改所述 iFC的步骤包括:
由所述 AS修改归属用户服务器(HSS )中的 iFC, 并通过所述 HSS修改 呼叫会话控制功能(S-CSCF ) 中的 iFC; 或者,
由所述 AS修改所述 HSS及所述 S-CSCF中的 iFC。
4、 如权利要求 3所述的方法, 其中,
所述 S-CSCF为所述初始请求的接收方用户的 S-CSCF,且所述 HSS为所 述初始请求的接收方用户的 HSS; 或者,
所述 S-CSCF为所述初始请求的接收方的业务相关用户的 S-CSCF, 且所 述 HSS为所述初始请求的接收方的业务相关用户的 HSS。
5、 如权利要求 4所述的方法, 其中,
对所述 iFC的修改包括: 增加触发规则并放置于所述 iFC触发序列的队 首;
所述触发规则的业务点触发器( Service Point Trigger )为: 若收到第二初始请求的发送方用户为所述初始请求的接收方用户, 或接 收方的业务相关用户,
且所述第二初始请求带有替换头部( Replace Header )时, 若所述替换头 部的对话标识( Dialog ID )为所述 AS在所述初始请求中出呼侧 ( outgoing ) 的 Dialog ID , 则触发所述 AS。
6、 如权利要求 3所述的方法, 其中,
所述 S-CSCF为所述初始请求的发送方用户的 S-CSCF,且所述 HSS为所 述初始请求的发送方用户的 HSS。
7、 如权利要求 6所述的方法, 其中,
对所述 iFC的修改包括: 增加触发规则并放置于所述 iFC触发序列的队 首;
所述触发规则的业务点触发器( Service Point Trigger )为:
若收到第二初始请求的接收方用户为所述初始请求的发送方用户, 且所述第二初始请求带有替换头部( Replace Header )时, 若所述替换头 部的对话标识( Dialog ID )为所述 AS在所述初始请求中出呼侧 ( outgoing ) 的 Dialog ID , 则触发所述 AS。
8、 如权利要求 5或 7所述的方法, 所述方法还包括:
所述 S-CSCF收到第二初始请求时, 根据修改后的 iFC触发所述 AS。
9、 如权利要求 1或 2所述的方法, 所述方法还包括:
所述对话结束后, 所述 AS将所述修改后的 iFC恢复为原 iFC。
10、 如权利要求 5或 7所述的方法, 其中,
若所述初始请求按第一序列经过多个执行 B2BUA行为的 AS时,对所述 iFC的修改包括: 按照所述第一序列, 增加当前 AS的触发规则并放置于所述 iFC触发序列的队首,使修改后的 iFC的队首所增加的多个 AS对应的触发规 则按照所述第一序列的逆序排列。
11、 一种替换参数的替换系统, 应用于 IP多媒体子系统(IMS ) , 所述 系统包括执行背靠背代理(B2BUA )行为的应用服务器(AS ) , 所述 AS包 括: 修改初始过滤规则 (iFC )单元, 其中:
所述修改 iFC单元设置为: 当所述 AS作为路由 B2BUA或初始 B2BUA 收到对话的初始请求( Initial request for a dialog ) 时, 爹改所述初始请求的发 送方用户的 iFC, 或修改所述初始请求的接收方用户的 iFC, 或修改所述接收 方的业务相关用户的 iFC。
12、 如权利要求 11所述的系统, 所述系统还包括 HSS,
所述修改 iFC单元是设置为: 修改 HSS中的 iFC, 并指示所述 HSS修改 S-CSCF中的 iFC; 或者, 修改所述 HSS及所述 S-CSCF中的 iFC; 所述 HSS设置为: 根据所述修改 iFC单元的指示修改 S-CSCF中的 iFC。
13、 如权利要求 12所述的系统, 其中,
所述 S-CSCF为所述初始请求的接收方用户的 S-CSCF,且所述 HSS为所 述初始请求的接收方用户的 HSS; 或者,
所述 S-CSCF为所述初始请求的接收方的业务相关用户的 S-CSCF, 且所 述 HSS为所述初始请求的接收方的业务相关用户的 HSS;
对所述 iFC的修改包括: 增加触发规则并放置于所述 iFC触发序列的队 首;
所述触发规则的业务点触发器( Service Point Trigger )为: 若收到第二初 始请求的发送方用户为所述初始请求的接收方用户, 或接收方的业务相关用 户, 且所述第二初始请求带有替换头部( Replace Header )时, 若所述替换头 部的对话标识( Dialog ID )为所述 AS在所述初始请求中出呼侧 ( outgoing ) 的 Dialog ID , 则触发所述 AS。
14、 如权利要求 13所述的系统, 其中,
所述 S-CSCF为所述初始请求的发送方用户的 S-CSCF,且所述 HSS为所 述初始请求的发送方用户的 HSS; 对所述 iFC的修改包括: 增加触发规则并放置于所述 iFC触发序列的队 首;
所述触发规则的业务点触发器( Service Point Trigger )为: 若收到第二初 始请求的接收方用户为所述初始请求的发送方用户, 且所述第二初始请求带 有替换头部 ( Replace Header ) 时, 若所述替换头部的对话标识(Dialog ID ) 为所述 AS在所述初始请求中出呼侧 (outgoing ) 的 Dialog ID, 则触发所述 AS。
15、 如权利要求 11、 12、 13或 14所述的系统, 其中,
所述修改 iFC单元还设置为: 所述对话结束后, 将所述修改后的 iFC恢 复为原 iFC。
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