CN103731898A - Method for route SIP calling requesting - Google Patents
Method for route SIP calling requesting Download PDFInfo
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- CN103731898A CN103731898A CN201210385873.XA CN201210385873A CN103731898A CN 103731898 A CN103731898 A CN 103731898A CN 201210385873 A CN201210385873 A CN 201210385873A CN 103731898 A CN103731898 A CN 103731898A
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Abstract
The invention provides a method for route SIP calling requesting. The method comprises the steps that after a terminal has access to a network, the information which has access to an end office is recorded into a specific network element; after the end office or a gateway office receives a calling request, the information, having access to the end office, of a called terminal is inquired in the specific network element and is carried into reconstructed SIP calling request information, and then the information is sent; a tandem office selects a route according to the received information of the called terminal, wherein the received information is carried in the reconstructed SIP calling request information and has access to the end office; according to the received SIP calling request information, the calling request is directly processed by the end office to which the called terminal has access. The method for route SIP calling requesting can well meet the requirement that a mobile terminal moves and roams at any time, shorten SIP calling continuity time in a mobile core network, improve the SIP calling processing capability of the core network, and reduce huge workloads of system maintenance personnel for planning and configuring called number information.
Description
Technical field
The present invention relates to core net route technology, relate in particular to a kind of method based on device id route SIP call request.
Background technology
Known core net and Softswitch are all generally to use the called number in call request message to carry out route SIP call request.According to the network planning, carry out configuration number routing iinformation data in advance, different number segments is specified different routing channels, and regulation is routed to call request in the equipment of anticipation.When receiving a new SIP call request message, first according to called number, carry out number analysis, obtain a routing channel information, then according to the pre-configured information of this passage, call request is transmitted to the equipment of appointment, by follow-up equipment, continues to process this call request.
This method of carrying out route SIP call request according to called number is for mobile network, and its efficiency is not high, even in most situation, and its poor efficiency.Such as, in mobile network, terminal is to move at any time, everywhere.Very large if the probability of roaming occurs certain user, or roaming has occurred a lot of user, use so the efficiency of carrying out the method for route SIP call request according to called number can become very low.
The strategy that carries out route SIP calling according to called number is manually to carry out pre-configured data, these data can not well adapt to the requirement of user mobility, that is to say and can not revise along with moving of user the pre-configured information of carrying out routing call request according to called number.
In addition, increase or delete an equipment (tandem exchange or end office (EO)) in a core net, may need to revise the number analysis data of whole core net all devices, this workload is very heavy, and can have very large risk in the process of revising.
Summary of the invention
In order to solve the aforementioned problems in the prior, the present invention proposes a kind of method of route SIP call request, and the method comprises: after a. accessing terminal to network, the information of its access end office (EO) is recorded in special network element, such as being recorded in attaching position register; B. end office (EO) or gateway exchange are received after call request, inquire about the information of terminal called access end office (EO) from special network element, are carried in the SIP call request message of reconstruct, and send this message; C. tandem exchange is according to the Information Selection route of the terminal called access end office (EO) of carrying in the SIP call request message receiving; D. the end office (EO) of terminal called access, according to the SIP call request message receiving, directly processes this call request.
Further, the SIP call request message of reconstruct can also carry special key words; Combining of the information of special key words and terminal called access end office (EO) can this equipment of unique identification, or the information of terminal called access end office (EO) can this equipment of unique identification.
Preferably, the information of special key words and terminal called access end office (EO) can be carried in the TO header field of SIP call request message of reconstruct, and the URL form of the user profile part of TO header field is used domain name form.
Further, tandem exchange receives SIP call request message, parses special key words, then directly according to the information of terminal called access end office (EO), determines this end office (EO) position, this call request of route; SIP call request information is received by terminal called access end office (EO), parses after special key words, directly assert that terminal called accesses under it, to this terminal, initiates paging request.
Preferably, the information of access end office (EO) can be device id, and special network element can be attaching position register.
The method that the present invention proposes replaces called number analysis to carry out route SIP call request by the information of terminal called access end office (EO), well adapt to the demand that mobile terminal moves at any time and roams, can shorten the connecting time that the SIP in mobile core network calls out simultaneously, improve the SIP call handling capacity of core network, the huge workload of mitigation system attendant planning, configuration called number information.
Accompanying drawing explanation
Fig. 1 is the call request flow chart that in the inventive method, external user is called out this network users.
Fig. 2 is the call request flow chart that in the inventive method, this network users is called out this network users.
Embodiment
The method of proposition of the present invention is used the information router SIP call request of terminal called access end office (EO), has replaced in prior art and has carried out route SIP call request by called number.Its basic scheme is: when after accessing terminal to network, the information of its access end office (EO) is recorded in special network element, after starting up of terminal or roaming, system can be known terminal positional information automatically, can be good at adapting to the demand that mobile terminal moves at any time and roams like this.End office (EO) or gateway exchange are received after call request, inquire about the information of terminal called access end office (EO) from special network element, are carried in the SIP call request message of reconstruct, and send this message; Tandem exchange is according to the Information Selection route of the terminal called access end office (EO) of carrying in the SIP call request message receiving; The end office (EO) of terminal called access, according to the SIP call request message receiving, directly processes this call request.The mode of this direct route of information of utilizing terminal called access end office (EO), has saved loaded down with trivial details number analysis process, can shorten the connecting time that the SIP in mobile core network calls out, and improves the SIP call handling capacity of core network; Meanwhile, system maintenance personnel do not need to configure called number data message, have alleviated largely the burden of system maintenance personnel planning, configuration called number information.
Now, only take SCDMA system as example, illustrate how the present invention implements.In SCDMA system, user terminal is started shooting or roaming has been occurred, and can initiate registration request to end office's equipment, after succeeding in registration, end office's equipment can be notified HLR(attaching position register) preserve some information of this terminal use, wherein just comprise the information of this user terminal access end office (EO).
When gateway exchange is received after a SIP call request, to HLR inquiry called user information, know after end office's device id of this called user terminal core network access, gateway exchange re-constructs a new SIP call request message, the TO header field of this SIP call request message carries " SAGID " keyword and end office's device id, TO header field information is observed RFC3261 standard completely herein, does not have compatibility issue.Next, gateway exchange mails to this new SIP call request message can arrive the next stage tandem exchange that specifies end office's equipment.Tandem exchange receives SIP call request message, parses after special key words " SAGID ", no longer carries out called number analysis, but directly according to end office's device id, selects route, calling is mail to the end office (EO) of appointment.Finally, this SIP call request message is received by end office (EO), judge this message and carried " SAGID " keyword, directly assert that called user terminal is to be linked into core net by oneself, no longer need to HLR inquiry called user information, but directly to user terminal, initiate paging request, process this SIP call request.
Same, when the call request of mobile phone users is received by end office (EO), to HLR, inquire about the device id of called subscriber's access end office (EO), then new SIP call request message of reconstruct, end office's device id that TO header field wherein comprises called subscriber place.The SIP call request of carrying " SAGID " keyword is received by gateway exchange in core net, tandem exchange, just can directly follow according to device id and carry out this call request of route, rather than use called number to carry out routing call request.
In said process, the SIP call request message of reconstruct has carried special key words " SAGID ", and this keyword can be self-defined according to system.Combining of the information of special key words and terminal called access end office (EO) can this equipment of unique identification, SCDMA system used can unique identification equipment device id.
Below in conjunction with accompanying drawing, this method concrete routing procedure in SCDMA system is described in further details.
Example 1: external user is called out this network users.
As shown in Figure 1, take external user 9999, call out user 123456 under Home Network end office (EO) (device id is as 355) as example.
1) gateway exchange is received the call request that external user 9999 is called out this network users 123456;
2) gateway exchange is to HLR inquiry called subscriber's 123456 user profile, and information has comprised end office's device id (if being 355) of end office's core network access that called user terminal passes through, the i.e. device id of terminal called access end office (EO);
3) gateway exchange generates a SIP call request message, and TO header field is wherein filled to: TO:sip:123456SAGID.355.com;
4) gateway exchange is selected the tandem exchange of next stage according to device id 355, and this calling is transmitted to it;
5) tandem exchange receives after this SIP call request message, analyzes TO header field and comprises keyword " SAGID ", and at once according to device id 355, being assigned to device id is 355 end office (EO), and calling is transmitted to this end office (EO);
6) end office (EO) 355 receives after this SIP call request message, analyzes TO header field and comprises keyword " SAGID ", sends out paging request to the base station of its management at once, and follow-up call flow is the same with common call flow to carry out.
Example 2: this network users is called out this network users.
As shown in Figure 2, take the user 123457 under Home Network end office (EO) (device id is as 366), calling out the lower user of Home Network end office (EO) (device id is 355) 123456 is example:
1) call request of user 123457 calling parties 123456 under this end office (EO) is received by end office (EO) 366;
2) end office (EO) 366 is to HLR inquiry called subscriber's 123456 user profile, and information has comprised end office's device id (if being 355) of end office's core network access that called user terminal passes through;
3) end office (EO) 366 generates a SIP call request message, and TO header field is wherein filled to: TO:sip:123456SAGID.355.com;
4) tandem exchange of upper level is selected by end office (EO) 366 according to device id 355, and this calling is transmitted to it;
5) tandem exchange receives after this SIP call request message, analyzes TO header field and comprises keyword " SAGID ", at once according to device id 355, chooses the route that device id is 355 end office (EO), and calling is forwarded;
6) end office (EO) 355 receives after this SIP call request message, analyzes TO header field and comprises keyword " SAGID ", sends out paging request to the base station of its management at once, and follow-up call flow is the same with common call flow to carry out.
By above-mentioned example, can be found out, the method that the present invention proposes replaces called number information to carry out route SIP call request by the information of terminal called access end office (EO), well adapt to the demand that mobile terminal moves at any time and roams, can shorten the connecting time that the SIP in mobile core network calls out simultaneously, improve the SIP call handling capacity of core network, the huge workload of mitigation system attendant planning, configuration called number information.
The above; only for preferably embodiment of the present invention, but protection scope of the present invention is not limited to this, is anyly familiar with in technical scope that those skilled in the art disclose in the present invention; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (10)
1. a method for route SIP call request, is characterized in that, the method comprises:
A. after accessing terminal to network, the information of its access end office (EO) is recorded in special network element;
B. end office (EO) or gateway exchange are received after call request, inquire about the information of terminal called access end office (EO) from described special network element, are carried in the SIP call request message of reconstruct, and send this message;
C. tandem exchange is according to the Information Selection route of the terminal called access end office (EO) of carrying in the SIP call request message receiving;
D. the end office (EO) of terminal called access, according to the SIP call request message receiving, directly processes this call request.
2. method according to claim 1, is characterized in that step b, and the SIP call request message of described reconstruct also carries special key words.
3. method according to claim 2, is characterized in that, this equipment of combination unique identification of the information of described special key words and terminal called access end office (EO).
4. method according to claim 2, is characterized in that, described terminal called accesses this equipment of information unique identification of end office (EO).
5. method according to claim 2, is characterized in that, the information of described special key words and terminal called access end office (EO) is carried in the TO header field of SIP call request message of reconstruct.
6. method according to claim 5, is characterized in that, the URL form of the user profile part of described TO header field is used domain name form.
7. according to one of method described in claim 2～6, it is characterized in that, described step c further comprises: tandem exchange receives SIP call request message, parses special key words, then directly according to the information of terminal called access end office (EO), determine this end office (EO) position, this call request of route.
8. according to one of method described in claim 2～6, it is characterized in that, described steps d further comprises: SIP call request information is received by terminal called access end office (EO), parses after special key words, directly assert that terminal called accesses under it, initiates paging request to this terminal.
9. one of method according to claim 1 and 2, is characterized in that, the described information that accesses end office (EO) is device id.
10. method according to claim 1, is characterized in that, described special network element is attaching position register.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210385873.XA CN103731898A (en) | 2012-10-12 | 2012-10-12 | Method for route SIP calling requesting |
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| CN201210385873.XA CN103731898A (en) | 2012-10-12 | 2012-10-12 | Method for route SIP calling requesting |
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| WO2009092437A1 (en) * | 2008-01-21 | 2009-07-30 | Nokia Siemens Networks Oy | Completion of fax and analog data call |
| CN100550949C (en) * | 2006-12-30 | 2009-10-14 | 华为技术有限公司 | Analog service implementation method, system and intercommunication control unit |
| CN101720078A (en) * | 2008-10-09 | 2010-06-02 | 中国移动通信集团公司 | Number dddressing method of telecommunication network, number routing module and system |
| CN101754488A (en) * | 2008-12-05 | 2010-06-23 | 华为技术有限公司 | Logic control class communication equipment and communication method therefor |
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- 2012-10-12 CN CN201210385873.XA patent/CN103731898A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100550949C (en) * | 2006-12-30 | 2009-10-14 | 华为技术有限公司 | Analog service implementation method, system and intercommunication control unit |
| WO2009092437A1 (en) * | 2008-01-21 | 2009-07-30 | Nokia Siemens Networks Oy | Completion of fax and analog data call |
| CN101720078A (en) * | 2008-10-09 | 2010-06-02 | 中国移动通信集团公司 | Number dddressing method of telecommunication network, number routing module and system |
| CN101754488A (en) * | 2008-12-05 | 2010-06-23 | 华为技术有限公司 | Logic control class communication equipment and communication method therefor |
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