CN102932319B - A kind of for keeping the method and apparatus conversed - Google Patents
A kind of for keeping the method and apparatus conversed Download PDFInfo
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Abstract
The present invention proposes a kind of method and apparatus keeping conversing.When voice gateways VGW-1 detects that coupled sip server breaks down, for each permissible call, it can generate an INVITE, wherein contain Session-ID, the value of this Session-ID is identical with the value of the Session-ID of described permissible call, then, send to backup sip server the INVITE generated.When after the INVITE that voice gateways VGW-2 receives from backup sip server, it can judge that whether the value of the Session-ID in this INVITE is identical with the value of the Session-ID of certain permissible call current, if identical, then reply 200OK message to backup sip server.By using this method, when sip server breaking down, there will not be because the message in call sends unsuccessfully and causing the situation of termination of a call.Call between terminal use can keep always, until terminal use oneself stops this call.
Description
Technical field
The present invention relates to communication network, particularly relate to the method and apparatus for the treatment of call in communication network.
Background technology
In NGN network, as voice gateways (VoiceGateWay, when VGW) detecting that coupled sip server breaks down, all business on it can be switched on the sip server of backup by voice gateways, at present, most of voice gateways can remove all permissible calls on it, and the sip server then to backup re-registers terminal use.But removing all permissible calls can cause termination of a call, brings great inconvenience to user, and has a strong impact on the business of company, thus, operator generally all wishes keep current call when sip server breaks down.
For this reason, a solution known is at present, when sip server breaks down, voice gateways, except re-registering except terminal use to the sip server of backup, for permissible calls all in voice gateways, keep its media path.Because the media path of calling is not eliminated, the call thus between terminal use is unaffected.But, for the message (in-dialoguemessage) in dialogue, need the re-INVITE message used still can be sent to the sip server broken down in the such as value-added service such as session refreshing message (sessionrefreshmessage) and call hold service, call waiting, teleconferencing service, at this moment, because the current call of signaling failure will be terminated.
Fig. 1 illustrates a flow chart according to above-mentioned prior art.As shown in Figure 1, wherein, user A is by voice gateways VGW-1 access network, and user B is by voice gateways VGW-2 access network, voice gateways VGW-1 is communicated with voice gateways VGW-1 by sip server P, and sip server P ' is the backup server of sip server P.
In Fig. 1, step S101 to step S108 is the SIP session establishment process of standard, execution of step S108, the session establishment between user A and user B, and user A can converse with user B.
In communication process, sip server P breaks down and cannot normally work, and when voice gateways VGW-1 detects this fault, it can perform step S109, for all terminal uses under its administration are to backup sip server P ' registration.Meanwhile, voice gateways VGW-1 can keep the media path of current active conversations all on it, and therefore, the call of user A and user B is unaffected.
After a while, voice gateways VGW-1 sends re-INVITE message, this re-INVITE message may be caused by session refreshing, is also likely to be caused by the value-added service (such as call hold service, call waiting, teleconferencing service etc.) in calling.This re-INVITE message still can send to the sip server P broken down, as shown in step S111, this is the value of the Contact header field equaled due to the value of the request-URI field in this re-INVITE message in the 200OK message in step S106, also the ident value of i.e. sip server P.Obviously, this re-INVITE message can be failed, and voice gateways VGW-1 can retransmit re-INVITE message, as shown in step S112.Still failed after when repeating transmission one section, as shown in step S113, voice gateways VGW-1 can send BYE message to stop this session, and removes Media Stream, and like this, the call between user A and user B can stop thereupon.
As can be seen here; when sip server breaks down; adopt the method for prior art; although the call of user can be kept to a certain extent unaffected; but there will be some signaling message in communication process and occur failed situation; thus causing termination of a call, the call of protection user that can not be absolute is unaffected.
Summary of the invention
The present invention, in order to solve above-mentioned defect of the prior art, proposes a kind of method and apparatus.
According to a first aspect of the invention, provide a kind of in voice gateways for keep converse method, when voice gateways detect coupled server fail, said method comprising the steps of: a. is for each permissible call, generate a new session setup request message, in described message for end-to-end unique identify value and the described permissible call of the mark of call uniquely identify that the value of the mark conversed is identical for end-to-end, the value for the media parameter describing call for the value with described permissible call that describe the media parameter of call in described message is identical, b. described session setup request message is sent to backup server.
Preferably, described session setup request message is initial INVITE message, and the described media parameter for describing call is SDP parameter.
Preferably, described for end-to-end unique identify call be designated Session-ID.
According to a second aspect of the invention, provide a kind of in voice gateways for keeping the method conversed, said method comprising the steps of: c. receives from the new session setup request message of server; D. judge in described message for end-to-end unique value identifying the mark of call whether with certain current active conversations uniquely identify that the value of the mark conversed is identical for end-to-end; If e. sentence read result is identical, reply message to the described server transmission call request of setting up, wherein contain the described mark for end-to-end unique identification call.
Preferably, described session setup request message is initial INVITE message, and it is 200OK message that message is replied in the described call request of setting up.
Preferably, described for end-to-end unique identify call be designated Session-ID.
According to a third aspect of the invention we, provide a kind of in voice gateways for keep converse device, described device comprises: message creating apparatus, during for coupled server fail being detected when voice gateways, a new session setup request message is generated for each permissible call, in described message for end-to-end unique identify value and the described permissible call of the mark of call uniquely identify that the value of the mark conversed is identical for end-to-end, the value for the media parameter describing call for the value with described permissible call that describe the media parameter of call in described message is identical, first dispensing device, for sending described session setup request message to backup server.
Preferably, described session setup request message is initial INVITE message, and the described media parameter for describing call is SDP parameter.
Preferably, described for end-to-end unique identify call be designated Session-ID.
According to a forth aspect of the invention, provide a kind of in voice gateways for keep converse device, described device comprises: receiving system, for receiving the new session setup request message from server; Judgment means, for judge in described message for end-to-end unique value identifying the mark of call whether with certain current active conversations uniquely identify that the value of the mark conversed is identical for end-to-end; Second dispensing device, for replying message when the sentence read result of judgment means is identical to the described server transmission call request of setting up, wherein contains the described mark for end-to-end unique identification call.
Preferably, described session setup request message is initial INVITE message, and it is 200OK message that message is replied in the described call request of setting up.
Preferably, described for end-to-end unique identify call be designated Session-ID.
The method and apparatus of the application of the invention, when sip server breaks down, there will not be because the message in call sends unsuccessfully and causes the situation of termination of a call.Call between terminal use can keep always, until terminal use oneself stops this call.Therefore, the call between terminal use is unaffected, improves the performance of system.
Accompanying drawing explanation
By reading the detailed description done non-limiting example referring to accompanying drawing, other features, objects and advantages of the present invention will become more obvious.
Fig. 1 is the schematic diagram of the processing procedure conversed according to the maintenance of prior art;
Fig. 2 is the method flow schematic diagram for keeping call according to a specific embodiment of the present invention;
Fig. 3 is the process schematic for keeping call according to a specific embodiment of the present invention;
Fig. 4 be according to a specific embodiment of the present invention in voice gateways for keeping the structured flowchart of device conversed;
Fig. 5 be according to a specific embodiment of the present invention in voice gateways for keeping the structured flowchart of device conversed.
Embodiment
Basic thought of the present invention is: when sip server breaks down, and for each permissible call, the sip server by backup is set up a new call by voice gateways, for replacing original call.
The present invention is described in detail below with reference to each accompanying drawing.
Fig. 2 shows the method flow schematic diagram for keeping call according to a specific embodiment of the present invention.Wherein, voice gateways VGW-1, voice gateways VGW-2 are connected with sip server P, and sip server P ' is the backup server of sip server P.
When voice gateways VGW-1 detects that coupled sip server P breaks down, as described in the background art, voice gateways VGW-1 can send Register message to backup sip server P ', registers all terminal uses under its administration.
Meanwhile, voice gateways VGW-1 can perform step S201 to step S202.
In step s 201, for each permissible call, voice gateways VGW-1 can generate a new session setup request message.In this session setup request message, comprise one for end-to-end unique mark identifying call, the value of this mark uniquely identifies that the value of the mark conversed is identical with described permissible call for arriving to hold; The value for the media parameter describing call for the value with described permissible call that describe the media parameter of call in this message is identical.
In one embodiment, described session setup request message is initial INVITE message, and the described media parameter for describing call is SDP parameter.SDP (SessionDescriptionProtocol) is Session Description Protocol, adopts which type of host-host protocol, the coded system of call employing, the IP address of call and port, packing manner etc. for the call described between two terminals.Therefore, SDP parameter is a set comprising multiple parameter normally, can comprise SDP parameter for describing the medium property of call in INVITE.
In one embodiment, described for end-to-end unique identify call be designated Session-ID (call identifier).Session-ID defines in the draft-kaplan-sip-session-id-02.txt file of IETF tissue issue.Session-ID is distributed by voice gateways at first, and for end-to-end unique identification one call, the whole network is unique, and be not changed through B2BUA (BacktoBackUserAgent, back-to-back user agent) time.Sip server P and backup sip server P ' is B2BUA.
Then, voice gateways VGW-1 can send the INVITE of above-mentioned generation to backup sip server P ', as shown in step S202.Cause network congestion and backup sip server P ' overload in order to avoid sending a large amount of INVITE simultaneously, voice gateways VGW-1 can select random delay to send above-mentioned INVITE.
Backup sip server P ' is after receiving above-mentioned session setup request message, and processing procedure is identical with process at ordinary times.Suppose that the destination of one of them session setup request message is voice gateways VGW-2, backup sip server P ' can send this session setup request message to voice gateways VGW-2.
In voice gateways VGW-2 side, it will perform step S203 to step S205.
As shown in step S203, voice gateways VGW-2 receives the new session setup request message from backup sip server P '.In one embodiment, described session setup request message is initial INVITE message.
Then, in step S204, voice gateways VGW-2 can judge in this message for end-to-end unique value identifying the mark of call whether with certain current active conversations uniquely identify that the value of the mark conversed is identical for end-to-end.In one embodiment, described for end-to-end unique identify call be designated Session-ID.Voice gateways VGW-2 can judge that whether the value of Session-ID in this INVITE is identical with the value of the Session-ID of certain permissible call current.
If judged result is identical, subsequently in step S205, voice gateways VGW-2 can reply message to backup sip server P ' the transmission call request of setting up, and in this reply message, contains the above-mentioned mark for end-to-end unique identification call.In one embodiment, described session setup request message is initial INVITE message, and it is 200OK message that message is replied in the described call request of setting up.In one embodiment, described for end-to-end unique identify call be designated Session-ID.
Backup sip server P ' is after receiving above-mentioned 200OK message, and it can send 200OK message to voice gateways VGW-1.So far, new call is set up between voice gateways VGW-1 and voice gateways VGW-2, and via backup sip server P ', new call will replace original call, and upgrade due to signaling paths, in various dialogue, message can transmit smoothly, and various supplementary service can both continue to use, thus call between terminal use is unaffected.
Fig. 3 shows the process schematic for keeping call according to a specific embodiment of the present invention.Wherein, user A is by voice gateways VGW-1 access network, and user B is by voice gateways VGW-2 access network, and voice gateways VGW-1 is communicated with voice gateways VGW-1 by sip server P, and sip server P ' is the backup server of sip server P.
In Fig. 3, step S301 to step S308 is the SIP session establishment process of standard, execution of step S308, the session establishment between user A and user B, and user A can converse with user B.Can find out, the value of the Session-ID conversed between user A and user B is SID-1, through above-mentioned steps, also selectes for describing the SDP parameter conversed between user A and user B.
In communication process, sip server P breaks down and cannot normally work, and when voice gateways VGW-1 detects this fault, it can perform step S309, for all terminal uses under its administration are to backup sip server P ' registration.Meanwhile, voice gateways VGW-1 can keep the media path of current active conversations all on it, and therefore, the call of user A and user B is unaffected.
Then, for the call between user A and user B, voice gateways VGW-1 can generate a new session setup request message, the initial INVITE message shown in step S311 in such as figure.Can see, in this INVITE, the value of Call-ID field is 2a, and the value of Call-ID field is 1a in above-mentioned step S301 and step S304, this is because for a new initial INVITE message, voice gateways VGW-1 can distribute a different Call-ID, be used for representing that this INVITE is a new initial INVITE message, instead of the message (in-dialoguemessage) in the dialogue of an existing call.Thus, said new initial INVITE message in this, refers to that the value of Call-ID field in this INVITE is different from the value of the Call-ID field of existing call.
One is comprised for end-to-end unique mark identifying call in this INVITE, such as Session-ID, the value of this Session-ID is identical with the value of the Session-ID conversed between user A and user B, and namely in this INVITE, the value of Session-ID is SID-1.Also comprise the media parameter for describing call in this INVITE, such as SDP parameter, wherein the value of SDP parameter is identical with the value of the SDP parameter for describing current talking between user A and user B.
Then, voice gateways VGW-1 can send the INVITE of above-mentioned generation to backup sip server P ', as shown in step S311.
Backup sip server P ' is after receiving above-mentioned INVITE, processing procedure is identical with processing procedure of the prior art, it can send INVITE to voice gateways VGW-2, as shown in step S312, wherein the value of Session-ID is that the value of SID-1, SDP parameter is identical with the value of the SDP parameter of current talking.
Voice gateways VGW-2 receives the new session setup request message from backup sip server P ', than initial INVITE message described above, as shown in step S312.
Then, voice gateways VGW-2 can read in the INVITE received for end-to-end unique value identifying the mark of call, the value of such as Session-ID, and judge that whether the value of this Session-ID is identical with the value of the Session-ID of certain permissible call under its administration.
The value of the Session-ID read is SID-1, through multilevel iudge, the value of this Session-ID is identical with the value of the Session-ID conversed between user A and user B, voice gateways VGW-2 learns that this call is not a new call thus, but an existing call, the other side's voice gateways may encounter sip server fault, it is desirable to keep existing call unaffected by re-establishing a newly call in the mode of replacing existing call.
Then, in step S313, voice gateways VGW-2 sends the call request of setting up to backup sip server P ' and replys message, ratio 200OK message as illustrated in the drawing, contain above-mentioned Session-ID within the message, its value is SID-1, and wherein the value of SDP parameter is identical with the value of the SDP parameter of current talking.
Backup sip server P ' is after receiving above-mentioned 200OK message, processing procedure is identical with processing procedure of the prior art, it can send 200OK message to voice gateways VGW-1, as shown in step S314 in figure, wherein the value of Session-ID is that the value of SID-1, SDP parameter is identical with the value of the SDP parameter of current talking.
Then, in step S315, voice gateways VGW-1 sends ACK message to backup sip server P ', and wherein the value of Session-ID is SID-1.
Then, in step S316, backup sip server P ' sends ACK message to voice gateways VGW-2, and wherein the value of Session-ID is SID-1.
So far, call new between user A and user B is set up between voice gateways VGW-1 and voice gateways VGW-2, and via backup sip server P ', new call will replace call original between user A and user B, thus call between user A and user B is unaffected.
In step S317, voice gateways VGW-1 can send re-INVITE message, this re-INVITE message may be caused by session refreshing, is also likely to be caused by the value-added service (such as call hold service, call waiting, teleconferencing service etc.) in calling.This re-INVITE message can not send to the sip server P broken down, but backup sip server P ' can be sent to, this is the value of the Contact header field equaled due to the value of the request-URI field in this re-INVITE message in the 200OK message in step S314, also namely backs up the ident value of sip server P '.Therefore, different with prior art, this re-INVITE message there will not be the situation that transmission is failed, and in dialogue, signalling route information also have updated, and the call between user A and user B is unaffected.After backup sip server P ' receives above-mentioned re-INVITE message, process identical with prior art, thus step S318 is prior art to step S322, repeats no more herein.
As can be seen here, according to method of the present invention, there will not be because the message in call sends the situation unsuccessfully causing termination of a call, adopt method of the present invention, when sip server breaks down, the call between terminal use can remain always, until user oneself stops this call.
Fig. 4 show according to a specific embodiment of the present invention in voice gateways VGW-1 for keeping the structured flowchart of device conversed.In the diagram, this device 400 comprises message creating apparatus 401 and the first dispensing device 402.
Below in conjunction with Fig. 2, the course of work of device 400 is elaborated.
When voice gateways VGW-1 detects that coupled sip server P breaks down, as described in the background art, voice gateways VGW-1 can send Register message to backup sip server P ', registers all terminal uses under its administration.
Meanwhile, for each permissible call, message creating apparatus 401 can generate a new session setup request message.In this session setup request message, comprise one for end-to-end unique mark identifying call, the value of this mark and described permissible call uniquely identify that the value of the mark conversed is identical for end-to-end; The value for the media parameter describing call for the value with described permissible call that describe the media parameter of call in this message is identical.
In one embodiment, described session setup request message is initial INVITE message, and as shown in step S201 in Fig. 2, the described media parameter for describing call is SDP parameter.
In one embodiment, described for end-to-end unique identify call be designated Session-ID (call identifier).
Then, the first dispensing device 402 can send the INVITE of above-mentioned generation to backup sip server P ', as shown in step S202 in Fig. 2.Cause network congestion and backup sip server P ' overload in order to avoid sending a large amount of INVITE simultaneously, the first dispensing device 402 can select random delay to send above-mentioned INVITE.
Fig. 5 show according to a specific embodiment of the present invention in voice gateways VGW-2 for keeping the structured flowchart of device conversed.In Figure 5, this device 500 comprises receiving system 501, judgment means 502 and the second dispensing device 503.
Below in conjunction with Fig. 2, the course of work of device 500 is elaborated.
As shown in step S203 in Fig. 2, receiving system 501 receives the new session setup request message from backup sip server P '.In one embodiment, described session setup request message is initial INVITE message.
Then, in step S204, judgment means 502 can judge in this message for end-to-end unique value identifying the mark of call whether with certain current active conversations uniquely identify that the value of the mark conversed is identical for end-to-end.In one embodiment, described for end-to-end unique identify call be designated Session-ID.Judgment means 502 can judge that whether the value of Session-ID in this INVITE is identical with the value of the Session-ID of certain permissible call current.
If the judged result of judgment means is identical, subsequently in step S205, second dispensing device 503 can reply message to backup sip server P ' the transmission call request of setting up, and in this reply message, contains the above-mentioned mark for end-to-end unique identification call.In one embodiment, described session setup request message is INVITE, and it is 200OK message that message is replied in the described call request of setting up.In one embodiment, described for end-to-end unique identify call be designated Session-ID.
To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned exemplary embodiment, and when not deviating from spirit of the present invention or essential characteristic, the present invention can be realized in other specific forms.Therefore, no matter from which point, all should execution mode be regarded as exemplary, and be nonrestrictive, scope of the present invention is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the present invention.In addition, obviously " comprising " one word do not get rid of other unit or step, odd number does not get rid of plural number.First, second word such as grade is used for representing title, and does not represent any specific order.
Claims (12)
1. in voice gateways for keep converse a method, when voice gateways detect coupled server fail, said method comprising the steps of:
A. for each permissible call, generate a new session setup request message, in described message for end-to-end unique identify value and the described permissible call of the mark of call uniquely identify that the value of the mark conversed is identical for end-to-end, the value for the media parameter describing call for the value with described permissible call that describe the media parameter of call in described message is identical;
B. described session setup request message is sent to backup server.
2. method according to claim 1, is characterized in that, described session setup request message is initial INVITE message, and the described media parameter for describing call is SDP parameter.
3. method according to claim 1 and 2, is characterized in that, described for end-to-end unique identify call be designated Session-ID.
4. in voice gateways for keep converse a method, said method comprising the steps of:
C. the new session setup request message from backup server is received;
D. judge in described message for end-to-end unique value identifying the mark of call whether with certain current active conversations uniquely identify that the value of the mark conversed is identical for end-to-end;
If e. sentence read result is identical, reply message to the described backup server transmission call request of setting up, wherein contain the described mark for end-to-end unique identification call.
5. method according to claim 4, is characterized in that, described session setup request message is initial INVITE message, and it is 200OK message that message is replied in the described call request of setting up.
6. the method according to claim 4 or 5, is characterized in that, described for end-to-end unique identify call be designated Session-ID.
7. in voice gateways for keep converse a device, described device comprises:
Message creating apparatus, during for coupled server fail being detected when voice gateways, a new session setup request message is generated for each permissible call, in described message for end-to-end unique identify value and the described permissible call of the mark of call uniquely identify that the value of the mark conversed is identical for end-to-end, the value for the media parameter describing call for the value with described permissible call that describe the media parameter of call in described message is identical;
First dispensing device, for sending described session setup request message to backup server.
8. device according to claim 7, is characterized in that, described session setup request message is initial INVITE message, and the described media parameter for describing call is SDP parameter.
9. the device according to claim 7 or 8, is characterized in that, described for end-to-end unique identify call be designated Session-ID.
10. in voice gateways for keep converse a device, described device comprises:
Receiving system, for receiving the new session setup request message from backup server;
Judgment means, for judge in described message for end-to-end unique value identifying the mark of call whether with certain current active conversations uniquely identify that the value of the mark conversed is identical for end-to-end;
Second dispensing device, for replying message when the sentence read result of judgment means is identical to the described backup server transmission call request of setting up, wherein contains the described mark for end-to-end unique identification call.
11. devices according to claim 10, is characterized in that, described session setup request message is initial INVITE message, and it is 200OK message that message is replied in the described call request of setting up.
12. devices according to claim 10 or 11, is characterized in that, described for end-to-end unique identify call be designated Session-ID.
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| US10057309B2 (en) * | 2016-06-29 | 2018-08-21 | Microsoft Technology Licensing, Llc | Concurrent serving of a media stream |
| CN108337103B (en) * | 2017-01-20 | 2021-08-06 | 普天信息技术有限公司 | Backup method, backup recovery method and system of SIP server |
| CN110943987A (en) * | 2019-11-28 | 2020-03-31 | 迈普通信技术股份有限公司 | Communication method, access gateway and system based on session initiation protocol SIP |
| CN115865640A (en) * | 2022-11-25 | 2023-03-28 | 厦门亿联网络技术股份有限公司 | Negotiation Disaster Recovery Method, Device, Storage Medium and System for Calls |
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| CN101855890A (en) * | 2007-11-13 | 2010-10-06 | 诺基亚西门子通信公司 | Method, apparatus and program product for merging communication sessions in an IMS |
| CN101674313A (en) * | 2009-10-15 | 2010-03-17 | 杭州华三通信技术有限公司 | SIP registration method for server to actively inform user switching, system and device thereof |
| CN101827111A (en) * | 2010-05-12 | 2010-09-08 | 中兴通讯股份有限公司 | TCP (Transfer Control Protocol) linking method, network system, client end and server |
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