CN101848219B - Method for solving forward switching type business cycle triggering - Google Patents
Method for solving forward switching type business cycle triggering Download PDFInfo
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- CN101848219B CN101848219B CN201010182513A CN201010182513A CN101848219B CN 101848219 B CN101848219 B CN 101848219B CN 201010182513 A CN201010182513 A CN 201010182513A CN 201010182513 A CN201010182513 A CN 201010182513A CN 101848219 B CN101848219 B CN 101848219B
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Abstract
The invention discloses a method for solving forward switching type business cycle triggering, which relates to the communication field, and comprises the steps of: triggering the unconditional forward switching AS of the attribution domain of a user B, sending a new call to a user C, triggering the unconditional forward switching AS of the attribution domain of the user C, sending a new call to the user B, and triggering the unconditional forward switching AS of the attribution domain of the user B; and selecting out the last 'Targeted-URI' field in a History-Info head in a received INVITE information by the unconditional forward switching AS of the attribution domain of the user B, comparing the field and the last 'Targeted-URI' field in the History-Info head in the received INVITE information, because the filed is the same as that of the first 'Targeted-URI' field in the History-Info head in the received INVITE information, the result shows that a corresponding business user circularly triggers the unconditional forward switching AS, and thereby 4XX information is immediately sent to release a call.
Description
Technical field
The present invention relates to the communications field; Point out in Internet Protocol (IP:Internet Protocol) IP multimedia subsystem, IMS; The preceding commentaries on classics of contracting as a plurality of called subscribers is type professional to be taken place when nested; That can cause these called subscribers precedingly changes a type professional circulation and triggers a problem, and proposes the method that can address this problem.
Background technology
IP Multimedia System (IMS:IP Multimedia Core Network Subsystem) is a kind of IP-based network framework that is proposed by third generation partner program (3GPP:3rd Generation Partnership Project) tissue; It has made up an opening and service environment flexibly; Support multimedia application, and abundant multimedia service is provided for the user.
In IP Multimedia System, application server (AS:Application Server) be used to provide service logic, supports user's miscellaneous service attribute.The service call conversation control function (S-CSCF:Serving Call Session Control Function) of the home domain at service-user place triggers AS and carries out correspondent service logic according to the CAMEL-Subscription-Information of service-user.
A preceding commentaries on classics type business that realizes at present comprises: business such as Call Forwarding Unconditional, unregistered preceding commentaries on classics, Call Forwarding on mobile subscriber Not Reachable, divert when busy, Call Forwarding No Reply and called one number service.
Defined historical information (History-Info) head among the RFC4244; In the new request message of calling out, can increase this head; " the target unified resource sign " of this head (Targeted-URI) value of field is the request unified resource sign (Request-URI) in the new request message of calling out; Simultaneously; If do not contain the History-Info head in the request message that receives before, the History-Info head that then also need generate at the new request message of calling out begin to increase the Request-URI in the request message that receives.
Current business of changeing type takes place when nested, and the circulation of changeing before can causing between type professional AS triggers problem.With the Call Forwarding Unconditional business is example, when user A dials the URL of user B, if the signatory Call Forwarding Unconditional of user B; And preceding commentaries on classics purpose URL (URL:Uniform Resource Locator) is user C, simultaneously, and the also signatory Call Forwarding Unconditional of user C; And preceding commentaries on classics purpose URL is user B; Suppose that the maximum preceding commentaries on classics number of times that network allows is 5 times, corresponding flow process is as shown in Figure 1, may further comprise the steps:
Step 101-step 103: trigger the Call Forwarding Unconditional AS of the home domain of user B, initiate newly to call out user C, preceding commentaries on classics number of times is 1;
Step 104-step 106: trigger the Call Forwarding Unconditional AS of the home domain of user C, initiate newly to call out user B, preceding commentaries on classics number of times is 2;
Step 107-step 109: trigger the Call Forwarding Unconditional AS of the home domain of user B, initiate newly to call out user C, preceding commentaries on classics number of times is 3;
Step 110-step 112: trigger the Call Forwarding Unconditional AS of the home domain of user C, initiate newly to call out user B, preceding commentaries on classics number of times is 4;
Step 113-step 115: trigger the Call Forwarding Unconditional application server of the home domain of user B, initiate newly to call out user C, preceding commentaries on classics number of times is 5;
Step 116-step 117: the Call Forwarding Unconditional AS that triggers the home domain of user C;
Step 118: the Call Forwarding Unconditional AS of the home domain of user C judges that the preceding commentaries on classics number of times of this moment changes number of times before the maximum above the network permission, need transmission 4XX message call release.
Visible by above-mentioned flow process, the calling meeting triggering that between the Call Forwarding Unconditional AS of the home domain of the Call Forwarding Unconditional AS of the home domain of user B and user C, circulates, and after finally reaching cycle-index call release, taken a large amount of Internet resources.
Summary of the invention
Technical problem: the objective of the invention is to overcome the deficiency of prior art, a kind of preceding type method of cycle of business operations triggering problem of changeing of solution that reduces a large amount of Signalling exchanges is provided.
Technical scheme:, the invention provides a kind of in the preceding commentaries on classics type AS of IMS, the detection whether the circulation triggering and the method for end call when the generation circulation triggers have taken place in order to address the above problem.
Changeing type method of cycle of business operations triggering problem before the present invention solves may further comprise the steps:
Step 201: user A dials user B, and the service call conversation control function of user B home domain receives from rising of user A and exhale message,
Step 202: it is professional that the service call conversation control function of user B home domain inquires the user B Call Forwarding Unconditional of having contracted, and the Call Forwarding Unconditional application server that needs to trigger user B is carried out correspondent service logic; Service call conversation control function will rise to call for asks message to send to the Call Forwarding Unconditional application server of user B home domain;
Step 203: the Call Forwarding Unconditional application server of the home domain of user B has been received to call for and has been asked message; Initiate newly to call out user C, the new value that works " target unified resource sign " field of calling for the historical information head of asking in the message of calling out is respectively the URL of user B and the URL of user C;
Step 204: the service call conversation control function of user C home domain has been received to call for and has been asked message, has wherein carried " target unified resource sign " field of the application server insertion of user B;
Step 205: it is professional that the service call conversation control function of user C home domain inquires the user C Call Forwarding Unconditional of having contracted, and the Call Forwarding Unconditional application server that needs to trigger user C is carried out correspondent service logic; Service call conversation control function will rise to call for asks message to send to the Call Forwarding Unconditional application server of user C home domain;
Step 206: the Call Forwarding Unconditional application server that triggers the home domain of user C; Initiate newly to call out user B, new " target unified resource sign " value of field of calling for the historical information head of asking in the message that rises of calling out is respectively the URL of user B, the URL of user C and the URL of user B;
Step 207: the service call conversation control function of user C home domain will be revised rises to call for and asks message to send to the service call conversation control function of user B home domain, has wherein carried " target unified resource sign " field that the application server of user C inserts;
Step 208: it is professional that the service call conversation control function of user B home domain inquires the user B Call Forwarding Unconditional of having contracted, and the Call Forwarding Unconditional application server that needs to trigger user B is carried out correspondent service logic; Service call conversation control function will rise to call for asks message to send to the Call Forwarding Unconditional application server of user B home domain;
Step 209: the Call Forwarding Unconditional application server of the home domain of user B takes out rising of receiving and calls for last " the target unified resource sign " field in the historical information head of asking in the message; And this field and all " the target unified resource sign " fields call in the historical information head of asking in the message that rise that receive are compared; Because this field is identical with first " the target unified resource sign " field called in the historical information head of asking in the message that receives; Expression corresponding business user has been circulated and has been triggered this Call Forwarding Unconditional application server; Therefore, send 4xx message call release immediately;
Step 210: after the service call conversation control function of the home domain of user B receives 4xx message, this message is sent to the service call conversation control function of the home domain of user C;
Step 211: after the service call conversation control function of the home domain of user C receives 4xx message, this message is sent to the application server of the home domain of user C;
Step 212: after the application server of the home domain of user C receives 4xx message, this message is redispatched to the service call conversation control function of the home domain of user C;
Step 213: after the service call conversation control function of the home domain of user C receives 4xx message, this message is sent to the service call conversation control function of the home domain of user B;
Step 214: after the service call conversation control function of the home domain of user B receives 4xx message, this message is sent to the application server of the home domain of user B;
Step 215: after the application server of the home domain of user B receives 4xx message, this message is redispatched to the service call conversation control function of the home domain of user B;
Step 216: after the service call conversation control function of the home domain of user B receives 4xx message, this message is sent to calling subscriber A.
Beneficial effect: the present invention changes the method that there are a large amount of Signalling exchanges in type cycle of business operations triggering problem before a kind of the minimizing is provided.This method provides a kind of in the preceding commentaries on classics type AS of IP Multimedia System, the detection whether circulation triggering and end call when the generation circulation triggers have taken place.The present invention is simple and practical, can in IP Multimedia System, be widely used.
Description of drawings
Circulation when changeing the class business nesting before Fig. 1 triggers problem,
The circulation detection trigger mechanism of changeing type AS before Fig. 2 has been avoided a large amount of Signalling exchanges.
Embodiment
Current change a type professional AS received call for ask (INVITE) message after; Last " Targeted-URI " field that rising of needing to receive exhaled the History-Info head in the INVITE exhales each " Targeted-URI " field of the History-Info head in the INVITE to compare with rising of receiving; If there is identical situation; Representing then that the corresponding business user has been circulated changes a type professional AS before having triggered this; At this moment, trigger problem if be initiated to the circulation of changeing between type professional AS before the new calling of original purpose URL will cause taking place again, as shown in Figure 1.Therefore, need interrupt call immediately, avoid Signalling exchanges a large amount of in the IMS network.If last " Targeted-URI " field that rising of receiving exhaled the History-Info head in the INVITE with receive exhale each " Targeted-URI " field of the History-Info head in the INVITE all not have identical situation; Then representing changes a type professional AS before service-user does not have circulation to be triggered to this; Change purpose URL before can obtaining; And the purpose URL of preceding commentaries on classics is placed in " Targeted-URI " field of Request-URI head and History-Info head in the INVITE, initiate new calling.
Preceding commentaries on classics type AS exhales the History-Info head in the INVITE according to rising of receiving, and whether detection has taken place to circulate is triggered, and end call when the circulation triggering takes place, and is example with the Call Forwarding Unconditional business, as shown in Figure 2, may further comprise the steps:
Step 201: user A dials user B, and the service call conversation control function of user B home domain receives from rising of user A and exhale message,
Step 202: it is professional that the service call conversation control function of user B home domain inquires the user B Call Forwarding Unconditional of having contracted, and the Call Forwarding Unconditional application server that needs to trigger user B is carried out correspondent service logic; Service call conversation control function will rise to call for asks message to send to the Call Forwarding Unconditional application server of user B home domain;
Step 203: the Call Forwarding Unconditional application server of the home domain of user B has been received to call for and has been asked message; Initiate newly to call out user C, the new value that works " target unified resource sign " field of calling for the historical information head of asking in the message of calling out is respectively the URL of user B and the URL of user C;
Step 204: the service call conversation control function of user C home domain has been received to call for and has been asked message, has wherein carried " target unified resource sign " field of the application server insertion of user B;
Step 205: it is professional that the service call conversation control function of user C home domain inquires the user C Call Forwarding Unconditional of having contracted, and the Call Forwarding Unconditional application server that needs to trigger user C is carried out correspondent service logic; Service call conversation control function will rise to call for asks message to send to the Call Forwarding Unconditional application server of user C home domain;
Step 206: the Call Forwarding Unconditional application server that triggers the home domain of user C; Initiate newly to call out user B, new " target unified resource sign " value of field of calling for the historical information head of asking in the message that rises of calling out is respectively the URL of user B, the URL of user C and the URL of user B;
Step 207: the service call conversation control function of user C home domain will be revised rises to call for and asks message to send to the service call conversation control function of user B home domain, has wherein carried " target unified resource sign " field that the application server of user C inserts;
Step 208: it is professional that the service call conversation control function of user B home domain inquires the user B Call Forwarding Unconditional of having contracted, and the Call Forwarding Unconditional application server that needs to trigger user B is carried out correspondent service logic; Service call conversation control function will rise to call for asks message to send to the Call Forwarding Unconditional application server of user B home domain;
Step 209: the Call Forwarding Unconditional application server of the home domain of user B takes out rising of receiving and calls for last " the target unified resource sign " field in the historical information head of asking in the message; And this field and all " the target unified resource sign " fields call in the historical information head of asking in the message that rise that receive are compared; Because this field is identical with first " the target unified resource sign " field called in the historical information head of asking in the message that receives; Expression corresponding business user has been circulated and has been triggered this Call Forwarding Unconditional application server; Therefore, send 4xx message call release immediately;
Step 210: after the service call conversation control function of the home domain of user B receives 4xx message, this message is sent to the service call conversation control function of the home domain of user C;
Step 211: after the service call conversation control function of the home domain of user C receives 4xx message, this message is sent to the application server of the home domain of user C;
Step 212: after the application server of the home domain of user C receives 4xx message, this message is redispatched to the service call conversation control function of the home domain of user C;
Step 213: after the service call conversation control function of the home domain of user C receives 4xx message, this message is sent to the service call conversation control function of the home domain of user B;
Step 214: after the service call conversation control function of the home domain of user B receives 4xx message, this message is sent to the application server of the home domain of user B;
Step 215: after the application server of the home domain of user B receives 4xx message, this message is redispatched to the service call conversation control function of the home domain of user B;
Step 216: after the service call conversation control function of the home domain of user B receives 4xx message, this message is sent to calling subscriber A.
Claims (1)
1. change the method that type cycle of business operations triggers problem before a solution, it is characterized in that this method may further comprise the steps:
Step 201: user A dials user B, and the service call conversation control function of user B home domain receives to call for from rising of user A and ask message,
Step 202: it is professional that the service call conversation control function of user B home domain inquires the user B Call Forwarding Unconditional of having contracted, and the Call Forwarding Unconditional application server that needs to trigger user B is carried out correspondent service logic; The service call conversation control function of user B home domain will rise to call for asks message to send to the Call Forwarding Unconditional application server of user B home domain;
Step 203: the Call Forwarding Unconditional application server of the home domain of user B has been received to call for and has been asked message; Initiate newly to call out user C, the new value that works " target unified resource sign " field of calling for the historical information head of asking in the message of calling out is respectively the URL of user B and the URL of user C;
Step 204: the service call conversation control function of user C home domain has been received to call for and has been asked message, has wherein carried " target unified resource sign " field of the application server insertion of user B;
Step 205: it is professional that the service call conversation control function of user C home domain inquires the user C Call Forwarding Unconditional of having contracted, and the Call Forwarding Unconditional application server that needs to trigger user C is carried out correspondent service logic; The service call conversation control function of user C home domain will rise to call for asks message to send to the Call Forwarding Unconditional application server of user C home domain;
Step 206: the Call Forwarding Unconditional application server that triggers the home domain of user C; Initiate newly to call out user B, new " target unified resource sign " value of field of calling for the historical information head of asking in the message that rises of calling out is respectively the URL of user B, the URL of user C and the URL of user B;
Step 207: the service call conversation control function of user C home domain will be revised rises to call for and asks message to send to the service call conversation control function of user B home domain, has wherein carried " target unified resource sign " field that the application server of user C inserts;
Step 208: it is professional that the service call conversation control function of user B home domain inquires the user B Call Forwarding Unconditional of having contracted, and the Call Forwarding Unconditional application server that needs to trigger user B is carried out correspondent service logic; The service call conversation control function of user B home domain will rise to call for asks message to send to the Call Forwarding Unconditional application server of user B home domain;
Step 209: the Call Forwarding Unconditional application server of the home domain of user B takes out rising of receiving and calls for last " the target unified resource sign " field in the historical information head of asking in the message; And this field and all " the target unified resource sign " fields call in the historical information head of asking in the message that rise that receive are compared; Because this field is identical with first " the target unified resource sign " field called in the historical information head of asking in the message that receives; Expression corresponding business user has been circulated and has been triggered this Call Forwarding Unconditional application server; Therefore, send 4xx message call release immediately;
Step 210: after the service call conversation control function of the home domain of user B receives 4xx message, this message is sent to the service call conversation control function of the home domain of user C;
Step 211: after the service call conversation control function of the home domain of user C receives 4xx message, this message is sent to the application server of the home domain of user C;
Step 212: after the application server of the home domain of user C receives 4xx message, this message is redispatched to the service call conversation control function of the home domain of user C;
Step 213: after the service call conversation control function of the home domain of user C receives 4xx message, this message is sent to the service call conversation control function of the home domain of user B;
Step 214: after the service call conversation control function of the home domain of user B receives 4xx message, this message is sent to the application server of the home domain of user B;
Step 215: after the application server of the home domain of user B receives 4xx message, this message is redispatched to the service call conversation control function of the home domain of user B;
Step 216: after the service call conversation control function of the home domain of user B receives 4xx message, this message is sent to calling subscriber A.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101267431A (en) * | 2007-03-12 | 2008-09-17 | 中兴通讯股份有限公司 | Matching method of initialization request message in IP multimedia sub-system service trigger |
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| CN101267431A (en) * | 2007-03-12 | 2008-09-17 | 中兴通讯股份有限公司 | Matching method of initialization request message in IP multimedia sub-system service trigger |
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