CN101895447A - SIP (Session Initiation Protocol) trunk gateway and failure monitoring method thereof - Google Patents
SIP (Session Initiation Protocol) trunk gateway and failure monitoring method thereof Download PDFInfo
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Abstract
The invention provides an SIP (Session Initiation Protocol) trunk gateway failure monitoring method capable of detecting failures in the trunk gateway except that of an SIP module and a system for implementing the method. In the invention, a failure monitoring timer is started after an SIP module processes a call from an IP (Internet Protocol) side; when the failure monitoring timer is over time and the SIP module does not receive a response reply corresponding to the call, the SIP module sends an overtime requiring message to an SIP server, and the SIP server confirms that the SIP trunk gateway has failures and switches the call route; and before the failure monitoring timer is over time and the SIP module receives a response replay corresponding to the call, the SIP module stops the failure monitoring timer corresponding to the call. In the invention, the SIP module is utilized to monitor other modules and a call protocol module of a PSTN (Public Switched Telephone Network) side on the trunk gateway and sends error responses to the SIP server in time so that the SIP server can be switched to a backup route in time.
Description
Technical field
The technical program relates to the method for a kind of SIP trunk gateway fails monitoring, is specifically related to a kind of realization of the SIP trunk gateway fails supervisory control system based on SIP (Session Initiation Protocol, session initiation protocol).
Background technology
Along with NGN (Next Generation Network, next generation network) flexible exchanging network, IMS (IP Multimedia Subsystem, IP Multimedia System) the progressively application of network and universal, IP voice-over and related application business have been trend of the times, but traditional PSTN is (Public Switched Telephone Network, PSTN) and the existing mobile phone network can't be substituted by NGN fully, need and deposit at interior two networks for a long time so, the intercommunication of two networks is exactly a very important problem, therefore the SIP trunk gateway arises at the historic moment, it can realize traditional PSTN network and VOIP (Voice over IP, ip voice) network interworking realizes the conversion of signaling and medium.
Because the importance of SIP trunk gateway can back up the SIP trunk gateway usually,, when finding that a SIP trunk gateway breaks down, switch to the trunk of an other backup such as using sip server (SIP SERVER) route backup strategy.Under this application model, sip server needs to detect the SIP trunk gateway fails in time, accurately, and the monitoring for signaling has timing mechanism in the Session Initiation Protocol standard (ietf standard draft RFC3261), this mechanism can detect the situation that the shutdown of the obstructed or SIP trunk gateway of network or SIP trunk gateway can be replied errored response at once, and for except that the SIP module, also carrying out other resume module on the SIP trunk gateway, if during the hello protocol module failure of other module or corresponding PSTN side, Session Initiation Protocol mechanism is just powerless.
The operation of SIP module is normal on the SIP trunk gateway, when calling out from the incoming call of sip server side, the SIP trunk gateway is received call request (invite) message, can respond 100trying message to sip server, but when the SIP module is finished call treatment and transfer to other hello protocol module, such as SS7 (Signaling System 7(SS-7) agreement), DSS1 (No. 1 agreement of digital subscriber signaling system), when PSTN protocol modules such as cno.1 are handled, when these hello protocol modules break down, as hanging up, endless loop, unusually withdraw from etc., can not provide response, cause the SIP module also can't provide response, sip server just can not in time perceive the SIP trunk gateway fails so, and can not in time switch to route stand-by.Influence user's sense organ and service application.
Summary of the invention
Technical problem to be solved by this invention is, a kind of system that can detect in the SIP trunk gateway except that the SIP module SIP trunk gateway fails method for supervising of fault and realize this method is provided.
The present invention solves the problems of the technologies described above the technical scheme that is adopted to be, SIP trunk gateway fails method for supervising comprises step:
The SIP module will start a failure monitoring timer after will finishing from the call treatment of IP side;
When the failure monitoring timer expiry, the SIP module does not receive the response that call out is replied that the SIP module sends request timed out message to sip server, and sip server confirms that the SIP trunk gateway breaks down, and switches this calling route;
Before the failure monitoring timer expiry, the SIP module receives the response that call out is replied that the SIP module stops the corresponding failure monitoring timer of this calling.
The present invention utilizes the SIP module that the hello protocol module of other module and PSTN side is monitored on the SIP trunk gateway, after finding that other hello protocol resume module is unusual, in time send wrong responses to sip server, make the SIP service end can in time switch to route stand-by, thereby calling can be connected smoothly.
On the one hand, customer call is exerted an influence when avoiding the SIP trunk gateway fails, sip server should switch the SIP trunk gateway route of session correspondence as early as possible, is provided with the time-out time of failure monitoring timer the smaller the better, thereby the influence that the user is caused is just more little; But, on the other hand, network jitter for fear of chance, perhaps other hello protocol side apparatus breaks down once in a while, when perhaps certain phone has problems, thereby wrongly must think that the SIP trunk gateway fails frequently switches SIP trunk gateway route, the time-out time of failure monitoring timer should not be provided with too small, should consider that network temporarily goes wrong, other hello protocol side apparatus suitable recovery time such as fault once in a while.Further, the present invention has introduced counter for taking into account top two kinds of situations, assists the SIP module to judge whether the SIP trunk gateway breaks down really by failure count, at different situations the failure monitoring timer is provided with different time-out times, specific as follows:
As a failure monitoring timer expiry of calling out correspondence, SIP module controls counter adds 1 operation;
Currency as counter is 0, illustrates that current SIP trunk gateway status is normal; The time-out time of failure monitoring timer is set to default max-timeout value;
Begun to count as counter, but counted maximum when the currency of counter less than presetting, the time-out time of the failure monitoring timer that the SIP module will start afterwards still is set to preset the max-timeout value; That is, be a period of thinking that tentatively the SIP trunk gateway breaks down this moment, but the erroneous judgement in order to prevent that factors such as network jitter from causing, time-out time is provided with longlyer;
After the currency of counter was more than or equal to default counting maximum, the time-out time in the failure monitoring timer that starts after the SIP module was set to preset minimum timeout value; Because in a period of time, fault has appearred in a plurality of sessions simultaneously, at this moment, the reliability that judgement SIP trunk gateway breaks down is higher, and time-out time just can be provided with shortlyer, so that sip server can switch route as early as possible, reduces the influence to the user.
In order to make that time-out time is more level and smooth to the variation between the default minimum timeout value in default max-timeout value in the failure monitoring timer, further:
Normal epoch and anti-shake phase: count minimum value when the currency of counter less than presetting, the time-out time of the failure monitoring timer that starts after the SIP module is set to default max-timeout value;
The level and smooth phase: when the currency of counter more than or equal to default counting minimum value, and during less than default counting maximum, counter whenever once adds 1 operation, the SIP module will after being provided with of time-out time in the failure monitoring timer that starts reduce N second; Wherein N is a positive integer;
Age at failure: after the currency of counter was more than or equal to default counting maximum, the time-out time in the failure monitoring timer that starts after the SIP module was set to preset minimum timeout value;
Wherein, (default counting maximum-default counting minimum value poor)≤(default max-timeout value-default minimum timeout value)/N, promptly the value behind the successively decreasing of the time-out time of level and smooth phase can not be less than default minimum timeout value.
Further, after counter adds 1 operation, receive when the SIP module response that call out replied that then the overtime reason of failure monitoring timer is not the fault of SIP trunk gateway before the explanation, but network jitter, perhaps other hello protocol side apparatus breaks down once in a while, perhaps certain phone existing problems and causing, at this moment, zero clearing counter then, and the time-out time in the failure monitoring timer that starts after being provided with is preset maximum value, reverts to the monitoring of normal condition.
Simultaneously, the present invention also provides a kind of SIP trunk gateway of realizing said method, comprises the SIP module, it is characterized in that, also comprises the failure monitoring timer;
The SIP module is used for, and is used for each is handled from the calling of IP side, and starts the failure monitoring timer of a correspondence in the back of finishing dealing with; When the failure monitoring timer expiry, the SIP module does not receive the response that call out is replied that the SIP module sends request timed out message to sip server; Before the failure monitoring timer expiry, the SIP module receives the response that call out is replied that the SIP module stops the corresponding failure monitoring timer of this calling;
The failure monitoring timer is used for, and the time-out time according to the SIP module is provided with carries out overtime timing under the control of SIP module.
Further, also comprise counter;
Counter is used for, and carries out counting operation under the control of SIP module;
The SIP module also is used for, and as a failure monitoring timer expiry of calling out correspondence, SIP module controls counter adds 1 operation; Count maximum when the currency of counter less than presetting, the time-out time of the failure monitoring timer that starts after the SIP module is set to default max-timeout value; After the currency of counter was more than or equal to default counting maximum, the time-out time in the failure monitoring timer that starts after the SIP module was set to preset minimum timeout value.
Further, the SIP module also is used for, and counts minimum value when the currency of counter less than presetting, and the time-out time of the failure monitoring timer that starts after the SIP module is set to default max-timeout value; When the currency of counter more than or equal to default counting minimum value, and during less than default counting maximum, counter whenever once adds 1 operation, the SIP module will after being provided with of time-out time in the failure monitoring timer that starts reduce N second; Wherein N is a positive integer; After the currency of counter was more than or equal to default counting maximum, the time-out time in the failure monitoring timer that starts after the SIP module was set to preset minimum timeout value;
Wherein, (default counting maximum-preset and count the poor of minimum value)≤(default max-timeout value-default minimum timeout value)/N.
Further, the SIP module also is used for, and after counter adds 1 operation, receive when the SIP module response that call out is replied, zero clearing counter then, and the time-out time in the failure monitoring timer that starts after being provided with is a preset maximum value.
Concrete, default max-timeout value is national distance or international long-distance the longest turn-on time, and default minimum timeout value is the local telephone minimal turn-on time.
The invention has the beneficial effects as follows, in the SIP trunk gateway, can in time find other hello protocol modules unusual except that the SIP module, and the notice sip server switches to route stand-by, make to call out smoothly and connect; Further, on switching time, can give the rational recovery time of provisional fault on the one hand, shorten the time of SIP module on the other hand again as far as possible to sip server transmission wrong responses in route.
Description of drawings
The network environment schematic diagram that Fig. 1 uses for the embodiment of the invention;
Fig. 2 is the schematic diagram of SIP trunk gateway in the embodiment of the invention;
Fig. 3 is for being provided with the schematic diagram of the time-out time of fault timer according to Counter Value in the embodiment of the invention.
Embodiment
Fig. 1 is the network environment figure that the embodiment of the invention is used, and the phone in needs such as the phone in the IP network (can answer the call on the terminating gateway) and the PSTN network or cellphone subscriber's conversation then need to carry out the network interconnection by the SIP trunk gateway; By route backup is set on sip server, realize the redundancy backup of trunk, when main road by obstructed the time, call out and automatically switch on the backup relays circuit, so how accurately, timely sip server determines that the quality of trunk is very crucial; And for the SIP trunk gateway, if himself breaks down, can not report to sip server, and this moment, sip server can only be judged whether fault of SIP trunk gateway according to the Session Initiation Protocol timeout mechanism, but this time-out time may be long, causes the long-time no response of calling party and on-hook.
Fig. 2 is an embodiment of the invention SIP trunk gateway structured flowchart, and what list here is protocol module on the call path, does not comprise applied business and driver module.Calling is during from the incoming call of Session Initiation Protocol module, and control module is delivered in the calling that the Session Initiation Protocol module will be received, control module is delivered to corresponding PSTN protocol module with calling, as DSS1, and SS7, R2 (cno.1).
Wherein, the SIP trunk gateway refers to realize PSTN agreement (DSS1, SS7 etc.) and Session Initiation Protocol intercommunication, the gateway device that relay voice, fax etc. are professional.
SIP trunk gateway common faults form can be summed up as following a few class: 1, PSTN line fault; 2, PSTN side the service of connection devices agreement does not have response; 3, PSTN protocol module deadlock, endless loop, task suspension; 4, SIP module deadlock, endless loop, task suspension; 5, other hello protocol module deadlock, endless loop, hang-up on the SIP trunk gateway; 6, calling correlation module call treatment is unusual on the SIP trunk gateway, and causing calling out does not have response.
For the 1st class fault, the SIP trunk gateway can detect and by Session Initiation Protocol response notice sip server, that is to say that sip server can recognize the SIP trunk gateway fails usually from the physical circuit step-out.
For the 4th class fault, although the SIP module can't provide any response, sip server is stipulated according to Session Initiation Protocol, can enter timeout treatment, and sip server can in time be judged whether fault of SIP trunk gateway by controlling this time-out time.
For the 2nd, 3,5,6 class faults, the SIP module can't provide finally and reply, but because the SIP module is normal, Temporary Response can in time be responded and give sip server, causes sip server can't judge the SIP trunk gateway fails.
This moment, we were by adding timing mechanism in the SIP module, when the SIP module receives that the IP side is called out, after calling being consigned to other hello protocol module, start the failure monitoring timer, if other hello protocol module does not have response such as PSTN protocol layer module, the failure monitoring timer will be overtime so, the SIP module sends request timed out message (type of message is 408) and gives sip server then, and sip server receives that laggard walking along the street is by switching.
For the setting of failure monitoring timer, use the high timer value when normally moving at ordinary times, after confirming that the SIP trunk gateway breaks down, use the low timer value, and send warning, allow administrative staff in time handle.Here high timer value operated by rotary motion is higher, is as the criterion (general 20 seconds) the longest turn-on time with long-distance or international long-distance usually, and low timer value operated by rotary motion is less, usually can put through the local telephone minimal turn-on time be as the criterion (general 6 seconds).
For fault verification, counter is set, be recorded in the expired times of the all-calls on this SIP trunk gateway, and two counter threshold are set, and one is the low count value, one is the high count value, this is in order to prevent network jitter, perhaps the PSTN side apparatus breaks down once in a while, and when perhaps certain phone had problems, mistake judged that the SIP trunk gateway breaks down.Here being provided with according to concrete network condition of counter decided, if network condition is good, then be provided with than fractional value (such as (low count value, the high count value) be (2,5)),, bigger numerical then is set (such as (low count value if network condition is bad, the high count value) is (3,10)).
As shown in Figure 3, each is from the calling of IP side incoming call, when consigning to other resume module after the SIP resume module, start failure monitoring timer (time-out time think high timer value: 20 seconds), after the generation of failure monitoring timer is overtime, enter the phase of trembling that disappears, the failure monitoring timer is every once overtime, and counter adds 1, when the currency of counter reaches low Counter Value (3 times), enter the level and smooth phase, beginning operation timer value, the every increase by 1 of counter, time-out time reduces 1 second, when the currency of counter reached high Counter Value (10 times), the time-out time of failure monitoring timer was set to low timer value (6 seconds), and equipment enters age at failure.Receive when the response that call out replied when the SIP module, illustrate that fault recovers counter O reset, failure monitoring timer recovery high timer value.
Like this, when the time-out time of failure monitoring timer drops to the low timer value, be provided with less owing to the low timer value, the SIP trunk gateway can in time provide request timed out message (type of message is 408) and give sip server, sip server just can in time carry out route and switch, and can not influence user's sense organ.After the SIP trunk gateway fails was recovered, sip server had switched with regard to not carrying out route.
This programme is counted according to the SIP trunk gateway fails and is judged whether the SIP trunk gateway exists fault really, realize timely response by dynamic adjustment timer value, and eliminate network jitter and indivedual special fault of phone, make under normal circumstances, it is professional not influence SIP trunk gateway itself, the abnormality processing pattern that enters that can be level and smooth under abnormal conditions provides response and gives sip server in the short time, little user's sense organ and the time of setting up a call of influencing of can trying one's best.
Claims (10)
1.SIP the Tandem Gateway failure monitoring method is characterized in that, comprises step:
The SIP module is finished each from the call treatment of IP side after, start the failure monitoring timer of a correspondence;
When the failure monitoring timer expiry, the SIP module does not receive the response that call out is replied that the SIP module sends request timed out message to sip server, and sip server confirms that the SIP trunk gateway breaks down, and switches this calling route;
Before the failure monitoring timer expiry, the SIP module is received this response answer to calling out, and the SIP module stops the corresponding failure monitoring timer of this calling.
2. SIP trunk gateway fails method for supervising according to claim 1 is characterized in that, calls out corresponding failure monitoring timer expiry as one, and SIP module controls counter adds 1 operation;
Count maximum when the currency of counter less than presetting, the time-out time of the failure monitoring timer that starts after the SIP module is set to default max-timeout value;
After the currency of counter was more than or equal to default counting maximum, the time-out time in the failure monitoring timer that starts after the SIP module was set to preset minimum timeout value.
3. as SIP trunk gateway fails method for supervising as described in the claim 2, it is characterized in that, when the currency of counter less than default counting minimum value, the time-out time of the failure monitoring timer that starts after the SIP module is set to preset the max-timeout value;
When the currency of counter more than or equal to default counting minimum value, and during less than default counting maximum, counter whenever once adds 1 operation, the SIP module will after being provided with of time-out time in the failure monitoring timer that starts reduce N second; Wherein N is a positive integer;
After the currency of counter was more than or equal to default counting maximum, the time-out time in the failure monitoring timer that starts after the SIP module was set to preset minimum timeout value;
Wherein, (default counting maximum-preset and count the poor of minimum value)≤(default max-timeout value-default minimum timeout value)/N.
4. as SIP trunk gateway fails method for supervising as described in the claim 2, it is characterized in that, after counter adds 1 operation, receive when the SIP module response that call out is replied, time-out time in the failure monitoring timer that then zero clearing counter, and setting starts afterwards is a preset maximum value.
5. as SIP trunk gateway fails method for supervising as described in the claim 2,3 or 4, it is characterized in that described default max-timeout value is national distance or international long-distance the longest turn-on time, described default minimum timeout value is the local telephone minimal turn-on time.
6.SIP Tandem Gateway comprises the SIP module, it is characterized in that, also comprises the failure monitoring timer;
Described SIP module is used for, and each is handled from the calling of IP side, and start the failure monitoring timer to calling out in the back of finishing dealing with; When the failure monitoring timer expiry, the SIP module is not received the response that call out is replied, and the SIP module sends wrong responses to sip server; Before the failure monitoring timer expiry, the SIP module receives the response that call out is replied that the SIP module stops the corresponding failure monitoring timer of this calling;
Described failure monitoring timer is used for, and the time-out time according to the SIP module is provided with carries out overtime timing under the control of SIP module.
7. as SIP trunk gateway as described in the claim 6, it is characterized in that, also comprise counter;
Described counter is used for, and carries out counting operation under the control of SIP module;
Described SIP module also is used for, and as a failure monitoring timer expiry of calling out correspondence, SIP module controls counter adds 1 operation; Count maximum when the currency of counter less than presetting, the time-out time of the failure monitoring timer that starts after the SIP module is set to default max-timeout value; After the currency of counter was more than or equal to default counting maximum, the time-out time in the failure monitoring timer that starts after the SIP module was set to preset minimum timeout value.
8. as SIP trunk gateway as described in the claim 7, it is characterized in that described SIP module also is used for, when the currency of counter less than default counting minimum value, the time-out time of the failure monitoring timer that starts after the SIP module is set to preset the max-timeout value; When the currency of counter more than or equal to default counting minimum value, and during less than default counting maximum, counter whenever once adds 1 operation, the SIP module will after being provided with of time-out time in the failure monitoring timer that starts reduce N second; Wherein N is a positive integer; After the currency of counter was more than or equal to default counting maximum, the time-out time in the failure monitoring timer that starts after the SIP module was set to preset minimum timeout value;
Wherein, (default counting maximum-preset and count the poor of minimum value)≤(default max-timeout value-default minimum timeout value)/N.
9. as SIP trunk gateway as described in the claim 7, it is characterized in that, described SIP module also is used for, after counter adds 1 operation, receive when the SIP module response that call out is replied, time-out time in the failure monitoring timer that then zero clearing counter, and setting starts afterwards is a preset maximum value.
10. as SIP trunk gateway as described in the claim 7,8 or 9, it is characterized in that described default max-timeout value is national distance or international long-distance the longest turn-on time, described default minimum timeout value is the local telephone minimal turn-on time.
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| CN102098191A (en) * | 2011-03-02 | 2011-06-15 | 冠科(福建)电子科技实业有限公司 | Method for monitoring SIP (Session Initiation Protocol) equipment in local area network |
| WO2017097130A1 (en) * | 2015-12-08 | 2017-06-15 | 阿里巴巴集团控股有限公司 | Method and apparatus for switching service nodes of distributed storage system |
| CN108769068A (en) * | 2018-06-28 | 2018-11-06 | 中国联合网络通信集团有限公司 | Call control method, device, terminal and the computer storage media of soft switch |
| CN109792469A (en) * | 2016-09-26 | 2019-05-21 | 微软技术许可有限责任公司 | Grouping is switched to PSTN calling and retracts |
| CN111447328A (en) * | 2020-03-25 | 2020-07-24 | 中国—东盟信息港股份有限公司 | Privacy number system fault warning system and method |
| CN112134645A (en) * | 2020-08-04 | 2020-12-25 | 国电南瑞科技股份有限公司 | Distributed terminal communication quality monitoring method, storage medium and computing device |
| WO2021017259A1 (en) * | 2019-07-30 | 2021-02-04 | 平安科技（深圳）有限公司 | Session monitoring and adjustment method, device, and apparatus, and storage medium |
| CN113660109A (en) * | 2021-07-06 | 2021-11-16 | 深圳市联洲国际技术有限公司 | Gateway switching method, device, terminal equipment and computer readable storage medium |
| CN115720204A (en) * | 2022-11-23 | 2023-02-28 | 证通股份有限公司 | Fault detection method and system for VoIP communication network element |
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| CN102098191A (en) * | 2011-03-02 | 2011-06-15 | 冠科(福建)电子科技实业有限公司 | Method for monitoring SIP (Session Initiation Protocol) equipment in local area network |
| US10862740B2 (en) | 2015-12-08 | 2020-12-08 | Alibaba Group Holding Limited | Method and apparatus for switching service nodes in a distributed storage system |
| WO2017097130A1 (en) * | 2015-12-08 | 2017-06-15 | 阿里巴巴集团控股有限公司 | Method and apparatus for switching service nodes of distributed storage system |
| CN109792469B (en) * | 2016-09-26 | 2021-07-09 | 微软技术许可有限责任公司 | Packet switched PSTN call fallback |
| CN109792469A (en) * | 2016-09-26 | 2019-05-21 | 微软技术许可有限责任公司 | Grouping is switched to PSTN calling and retracts |
| CN108769068B (en) * | 2018-06-28 | 2021-02-02 | 中国联合网络通信集团有限公司 | Call control method, device, terminal and computer storage medium for soft switch |
| CN108769068A (en) * | 2018-06-28 | 2018-11-06 | 中国联合网络通信集团有限公司 | Call control method, device, terminal and the computer storage media of soft switch |
| WO2021017259A1 (en) * | 2019-07-30 | 2021-02-04 | 平安科技（深圳）有限公司 | Session monitoring and adjustment method, device, and apparatus, and storage medium |
| CN111447328A (en) * | 2020-03-25 | 2020-07-24 | 中国—东盟信息港股份有限公司 | Privacy number system fault warning system and method |
| CN111447328B (en) * | 2020-03-25 | 2021-09-10 | 中国—东盟信息港股份有限公司 | Privacy number system fault warning system and method |
| CN112134645A (en) * | 2020-08-04 | 2020-12-25 | 国电南瑞科技股份有限公司 | Distributed terminal communication quality monitoring method, storage medium and computing device |
| CN112134645B (en) * | 2020-08-04 | 2024-03-29 | 国电南瑞科技股份有限公司 | Distributed terminal communication quality monitoring method, storage medium and computing device |
| CN113660109A (en) * | 2021-07-06 | 2021-11-16 | 深圳市联洲国际技术有限公司 | Gateway switching method, device, terminal equipment and computer readable storage medium |
| CN115720204A (en) * | 2022-11-23 | 2023-02-28 | 证通股份有限公司 | Fault detection method and system for VoIP communication network element |
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