CN100420205C - Soft exchange fault-tolerant processing method and implementing system - Google Patents
Soft exchange fault-tolerant processing method and implementing system Download PDFInfo
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- CN100420205C CN100420205C CNB2006100567864A CN200610056786A CN100420205C CN 100420205 C CN100420205 C CN 100420205C CN B2006100567864 A CNB2006100567864 A CN B2006100567864A CN 200610056786 A CN200610056786 A CN 200610056786A CN 100420205 C CN100420205 C CN 100420205C
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Abstract
The present invention provides a soft switch fault tolerance processing method which comprises the following steps that A. a signaling gateway of a calling side sends an initial address message to soft switch; B. the soft switch judges whether connection of service control nodes is failed, if true, then the step C is performed, else the normal call processing is performed; C. the soft switch judges whether a backup server exists, if true, then the soft switch realizes intelligent services by newly selecting routes to the backup server, else the soft switch is positioned to a signaling gateway of a called side according to information sent by the original signaling gateway of the calling side. The soft switch can newly select the routes to a server having backup data for providing the corresponding intelligent services by the present invention for intelligent services with the backup server. The soft switch can cause the ordinary call services to be continued by failure processing for intelligent services without the backup server. Thereby, the ordinary call services can not be influenced by the condition that the intelligent services can not be triggered.
Description
Technical field
The present invention relates to intelligent network technology, relate in particular to a kind of soft exchange fault-tolerant processing method and realization system.
Background technology
Among the NGN (Next Generation Net, next generation network), soft switch and SCP (ServiceControl Point, business control nodes) are nucleus equipments, can realize various intelligent network business by SCP with cooperating of soft switch.All professional controlled function that intelligent network provided all concentrate among the SCP, and the standard interface protocol according to intelligent network between SCP and the soft switch communicates, for example: INAP (intelligent network application protocol).Wherein, soft switch is used to handle call signaling, calls out control and business realizing; SCP is used to store user intelligent service data and miscellaneous service logic, comprising: receive data query request and Query Database that soft switch sends here, carry out various decodings; Start different service logics according to the call event of offering in the soft switch; Send the calling control command according to service logic to soft switch, next step action is carried out in the indication soft switch, thereby realizes various intelligent calls.
In existing technical scheme, after user's trigger intelligent business is found in soft switch, can send business request information to SCP, the call flows of SCP may further comprise the steps as shown in Figure 1:
Step s101, Calling Side SG (Signal Gateway, SGW) sends IAM (Initial Address Message, initial address message) to soft switch.
Step s102, the IAM message that flexible exchange analysis Calling Side SGW sends over, find the Calling Side SGW or called IN service arranged, will report IDP (Internet DatagramProtocol to SCP, the network data message protocol) message, SCP adopts different strategies according to the entrained User Status of this message.
Step s103, SCP issues RRBE (Request Report BCSM Event, request report BCSM incident) message to soft switch and monitors the message that soft switch reports, and wherein, BCSM represents (BasicCall Status Model, basic call state model).
Step s104, SCP sends CONNECT message to soft switch, comprises the information relevant with intelligent network business in this message.
Step s105, soft switch sends ACM (Address Complete Message, Address Complete Message) to callee side SG after analyzing called user information the callee side SGW normally continues.
Wherein, the SSP (Service Switch Point, operation exchange node) that soft switch can be used as intelligent network communicates DP (Detect Point with SCP, test point) for soft switch and SCP dock one of parameter, being used in the SSP side is the corresponding business key definition.For example: TDP (Trigger DetectionPoint triggers Detection Point), expression SSP will detect in this TDP point trigger intelligent business or the process at intelligent call and call out relevant incident.SCP is after analyzing this DP dot information, carry out according to the service logic that stores in advance, beam back control command through the call model interactive maintenance module among the SSP to BCSM again, PIC controls calling according to order, finish SCP control action to IN service, afterwards, BCSM continues the transfer of state, produce new DP point and report SCP, until end of calling.
In the prior art; when SCP break down SCP is unusual or soft switch and SCP between during link down; the soft switch meeting directly discharges this calling; if realize NP (Number Portability with SCP this moment; phone number is carried) business; will make the NP business not trigger, can't realize that the telephone subscriber changes its telephone number after, still can use original telephone number continuously.
In addition, if the user has registered as CRBT, value-added services such as color dial tone, when if soft switch detects SCP fault or SCP link failure, can discharge this IN service automatically calls out, and do not call out to the called subscriber, can make the user not only can not realize IN service, and even common call business can not carry out.
Summary of the invention
The problem to be solved in the present invention provides a kind of soft exchange fault-tolerant processing method and realization system, with the defective of SCP fault effects IN service and ordinary call business in the solution prior art.
In order to address the above problem, the invention provides a kind of soft exchange fault-tolerant processing method, may further comprise the steps:
A, Calling Side SGW send initial address message to soft switch;
B, soft switch judge whether connect business control nodes fails, if, then change step C, otherwise, carry out normal call and handle;
C, soft switch have judged whether backup server, if having, then change step D, otherwise, change step e;
D, soft switch realize IN service by being routed to backup server again;
E, soft switch navigate to the callee side SGW according to the initial address message that original Calling Side SGW sends over.
Step B further comprises:
B1, judge whether fault of business control nodes link, if then change step C; Otherwise, change step B2;
B2, soft switch send network data agreement IDP message to business control nodes, if in the setting cycle, business control nodes is response not, then changes step C.
Comprise in the network data agreement IDP message: intelligent network access code and called number.
Among the step B1, when the business control nodes link failure is judged in soft switch, send a release message, comprise the failure cause of link failure in this message to this soft switch.
Among the step B2, when the business control nodes fault is judged in soft switch, send a release message, comprise the failure cause of wait timeout in this message to this soft switch.
Step D further comprises:
D1, soft switch re-route according to predefined route data;
D2, soft switch send the IN service solicited message to backup server, comprise the IN service number in this information;
D3, backup server send the request response message to soft switch, comprise in this information and IN service number corresponding physical number;
D4, soft switch are reoriented to the callee side SGW after to the physical number analysis.
For MMS, behind the step D2, surpass setting-up time, backup server does not send the request response message, and then soft switch sends the IDP request to business control nodes, sends solicited message to backup server once more.
For MMS, also comprise after the step e: the callee side SGW sends common ring-back tone or the callee side SGW sends common dialing tone to caller to caller.
The present invention also provides a kind of soft switch fault-tolerance processing system, comprising: soft switch, business control nodes, Calling Side SGW and callee side SGW also comprise backup server;
Described soft switch is used to receive the information from the Calling Side SGW, and definite business control nodes state, when business control nodes fault or link failure, re-routes backup server, and the IN service number is sent to backup server;
Described backup server is used to find and IN service number corresponding physical number, and described physical number is handed down to described soft switch;
Described soft switch is used for carrying out weight analysis according to the physical number of receiving and navigates to the callee side SGW.
The present invention also provides a kind of soft switch fault-tolerance processing system, comprising: soft switch, business control nodes, Calling Side SGW and callee side SGW, it is characterized in that,
Described soft switch, be used to receive information from the Calling Side SGW, and definite business control nodes operating state, when business control nodes fault or link failure, the initial address message that sends over according to original Calling Side SGW navigates to the callee side SGW.
Compared with prior art, the present invention has the following advantages:
The present invention is for the IN service that backup server is arranged, and the soft switch meeting is routed to the server with Backup Data again by the failure processing corresponding IN service is provided; For the IN service that does not have backup server, soft switch can be handled by failure and make common call business to proceed, thereby common call business can be affected because IN service can not trigger.
Description of drawings
Fig. 1 is the call flows figure of SCP in the prior art;
Fig. 2 is the flow chart of a kind of soft exchange fault-tolerant processing method of the present invention;
Fig. 3 is that the present invention is applied to exist an embodiment in the backup server system that can handle IN service;
Fig. 4 is among Fig. 3 during the SCP secondary failure, process chart of the present invention;
Fig. 5 is that the present invention is applied to not have to handle an embodiment in the backup server system of IN service;
Fig. 6 is that the present invention is applied to not have to handle another embodiment in the backup server system of IN service.
Embodiment
The flow process of a kind of soft exchange fault-tolerant processing method of the present invention may further comprise the steps as shown in Figure 2:
Step s201, the Calling Side SGW sends initial address message to soft switch.Comprise in this message: user's off-hook and/or information such as calling subscriber and/or called number.Soft switch is carried out the prefix analysis by the prefix to called number, can determine that this business is IN service or ordinary call business.
Step s202, soft switch judges whether connect business control nodes fails, if, then change step s203, otherwise, carry out normal call and handle.Wherein, connect the business control nodes failure and comprise that business control nodes itself breaks down or business control nodes and soft switch link failure; Whether soft switch can normal according to the alarm indication inquiry business Control Node link that opens circuit; If link failure sends a release message to this soft switch, comprise the reason of link failure in this message; When the business control nodes link just often, soft switch by and business control nodes between sensing point send analytical information, comprise intelligent network access code and called number in this information, start timer simultaneously, in the response message of not receiving business control nodes above the setting-up time soft switch, judge that then business control nodes breaks down, send a release message, comprise the failure cause of wait timeout in this message to this soft switch.
Step s203, soft switch has judged whether backup server, if having, then changes step s204, otherwise, change step s205.
Step s204, soft switch realizes IN service by being routed to backup server again.The soft switch meeting is carried out routing again according to pre-set route data.Again after the routing, the soft switch meeting sends the IN service number to backup server, backup server is found and IN service number corresponding physical number, is handed down to soft switch then, and soft switch receives that carrying out weight analysis behind the physical number navigates to the callee side SGW.
Step s205, soft switch navigates to the callee side SGW according to the information that original Calling Side SGW sends over.Soft switch is carried out the ordinary call process analysis according to the information that original Calling Side SGW sends over, and navigates to the callee side SGW after analysis is finished and sends IAM message to the callee side SGW.
Below in conjunction with specific embodiment above-mentioned soft exchange fault-tolerant processing method is elaborated:
A specific embodiment is applied to exist in the backup server system that can handle IN service, for example, and the NP business that this IN service provides for SCP, as shown in Figure 3:
Step S301, calling subscriber's off-hook is dialled called number, sends IAM message by the Calling Side SGW to soft switch, comprises information such as user's off-hook and called number in this message.
Step S302 after IAM message is received in soft switch, analyzes the called number in this message, and what determine calling subscriber dialing according to the prefix of called number is NP IN service access code.Then, the connection status of SCP is judged,, can directly be given and itself send out a release message and with the failure reason value of uplink fault if the SCP link failure is found in soft switch; If soft switch inquiry SCP link success, can will will send IDP message to SCP by DP3 (analytical information), comprise intelligent access code and called number in this message, if SCP breaks down, soft switch will can not be received response message in the given time, wait timeout appears, and also can be to release message own and with the failure reason value of going up wait timeout.
Step S303, the soft switch meeting is carried out routing again according to pre-set route data, sends the IN service request to backup server.This backup server can be switch with NP data or the equipment with called NP number.
Step S304, backup server find and NP number corresponding physical number, are handed down to soft switch by request response.
Step S305, soft switch receives that carrying out weight analysis behind the physical number navigates to the callee side SGW, sends IAM message to this callee side SGW.
In addition, after SCP of appearance delays machine, after the rerouting, can on-the-fly modify former intelligent call attribute, in the regular hour, call out the route of directly walking to revise, after the time is overtime, revise former intelligent call attribute again, route the call to SCP.For the second time SCP delay machine handling process as shown in Figure 4:
Step S401, the Calling Side SGW sends IAM message to soft switch, comprises information such as user's off-hook and called number in this message.
Step S402, the information that flexible exchange analysis caller SGW sends over finds that caller SGW or called SGW have IN service, the soft switch meeting directly sends the IN service request to backup server; Enter step S403 if backup server has response, then do not enter step S404 if respond.
Step S403, backup server sends the request response to soft switch.
Step S404, soft switch sends the IDP request to SCP once more.
Step S405, the soft switch meeting is carried out routing again according to pre-set route data, sends the IN service request to backup server, waits for the request response, if also request response, can repeating step s404, or directly discharge this message.
Another specific embodiment is applied to not to be had can handle in the backup server system of IN service.For the IN service that does not have backup server, soft switch can be handled by failure and make common call business to proceed, thereby common call business can be affected because IN service can not trigger.For example, be that example illustrates with the Ring Back Tone service, as shown in Figure 5:
Step S501, calling subscriber's off-hook is dialled called number, sends IAM message by the Calling Side SGW to soft switch, comprises information such as user's off-hook and called number in this message.
Step S502 after IAM message is received in soft switch, analyzes the called number in this message, and what determine calling subscriber dialing according to the prefix of called number is the Ring Back Tone service access code.Then, the connection status of SCP is judged,, can directly be given and itself send out a release message and with the failure reason value of uplink fault if the SCP link failure is found in soft switch; If soft switch inquiry SCP link success, can will will send IDP message to SCP by DP3 (analytical information), comprise intelligent access code and called number in this message, if SCP breaks down, soft switch will can not be received response message in the given time, wait timeout appears, and also can be to release message own and with the failure reason value of going up wait timeout.
Step S503, soft switch is after receiving release message, can judge failure reason value, if find that failure reason value is above two kinds of situations, soft switch navigates to the callee side SGW according to the information such as called number that the Calling Side SGW sends over, and, realize the call proceeding of Calling Side SGW and callee side SGW to this callee side SGW transmission IAM message.
Step S504, soft switch sends common ring-back tone for the Calling Side SGW.
Another specific embodiment is applied to not to be had to handle in the backup server system of IN service, for example, is that example illustrates with the color dial tone business, as shown in Figure 6:
Step S601, calling subscriber's off-hook is dialled called number, sends IAM message by the Calling Side SGW to soft switch, comprises information such as user's off-hook and called number in this message.Connection status to SCP judges, if the SCP link failure is found in soft switch, can directly give and itself send out a release message and with the failure reason value of uplink fault; If soft switch inquiry SCP link success, can will will send IDP message to SCP by DP3 (analytical information), comprise intelligent access code and called number in this message, if SCP breaks down, soft switch will can not be received response message in the given time, wait timeout appears, and also can be to release message own and with the failure reason value of going up wait timeout.
Step S602 after IAM message is received in soft switch, analyzes the called number in this message, and what determine calling subscriber dialing according to the prefix of called number is the color dial tone service access code.
Step S603, soft switch is after receiving release message, can judge failure reason value, if find that failure reason value is above two kinds of situations, soft switch navigates to the callee side SGW according to the information such as called number that the Calling Side SGW sends over, and, realize the call proceeding of Calling Side SGW and callee side SGW to this callee side SGW transmission IAM message.
Step S604, soft switch sends common dialing tone for the caller SGW.
The present invention also provides a kind of soft switch fault-tolerance processing system, comprising: soft switch, business control nodes, Calling Side SGW and callee side SGW also comprise backup server.Wherein, soft switch is used to receive the information from the Calling Side SGW, and definite business control nodes operating state, when business control nodes fault or link failure, re-routes backup server, and the IN service number is sent to backup server; Backup server is used to find and IN service number corresponding physical number, and reanalyses and navigate to the callee side SGW through soft switch.
A kind of soft switch fault-tolerance processing system that does not have backup server of the present invention comprises: soft switch, business control nodes, Calling Side SGW and callee side SGW.In this system, soft switch is provided with the SCP link down or does not have the failure deal with data of the release cause of response.If link down appears in SCP or by can not responding that other reason causes, the soft switch meeting obtains that SCP can not respond or the release cause of link down.Soft switch is carried out follow-up failure according to this release cause value and is handled, not direct call release in this failure is handled, but the initial address message that sends over according to original Calling Side SGW navigates to the callee side SGW, to continue by ordinary call flow processing subsequent processes.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. a soft exchange fault-tolerant processing method is characterized in that, may further comprise the steps:
A, Calling Side SGW send initial address message to soft switch;
B, soft switch judge whether connect business control nodes fails, if, then change step C, otherwise, carry out normal call and handle;
C, soft switch have judged whether backup server, if having, then change step D, otherwise, change step e;
D, soft switch realize IN service by being routed to backup server again;
E, soft switch navigate to the callee side SGW according to the initial address message that original Calling Side SGW sends over.
2. soft exchange fault-tolerant processing method according to claim 1 is characterized in that step B further comprises:
B1, judge whether fault of business control nodes link, if then change step C; Otherwise, change step B2;
B2, soft switch send network data agreement IDP message to business control nodes, if in the setting cycle, business control nodes is response not, then changes step C.
3. as soft exchange fault-tolerant processing method as described in the claim 2, it is characterized in that, comprise in the network data agreement IDP message: intelligent network access code and called number.
4. as soft exchange fault-tolerant processing method as described in the claim 2, it is characterized in that, among the step B1, when the business control nodes link failure is judged in soft switch, send a release message, comprise the failure cause of link failure in this message to this soft switch.
5. as soft exchange fault-tolerant processing method as described in the claim 2, it is characterized in that, among the step B2, when the business control nodes fault is judged in soft switch, send a release message, comprise the failure cause of wait timeout in this message to this soft switch.
6. as soft exchange fault-tolerant processing method as described in claim 4 or 5, it is characterized in that step D further comprises:
D1, soft switch re-route according to predefined route data;
D2, soft switch send the IN service solicited message to backup server, comprise the IN service number in this information;
D3, backup server send the request response message to soft switch, comprise in this information and IN service number corresponding physical number;
D4, soft switch are reoriented to the callee side SGW after to the physical number analysis.
7. as soft exchange fault-tolerant processing method as described in the claim 6, it is characterized in that, for MMS, behind the step D2, surpass setting-up time, backup server does not send the request response message, then soft switch sends the IDP request to business control nodes, sends solicited message to backup server once more.
8. soft exchange fault-tolerant processing method according to claim 1 is characterized in that, for MMS, also comprises after the step e: the callee side SGW sends common ring-back tone or the callee side SGW sends common dialing tone to caller to caller.
9. soft switch fault-tolerance processing system comprises: soft switch, business control nodes, Calling Side SGW and callee side SGW, it is characterized in that, and also comprise backup server;
Described soft switch is used to receive the information from the Calling Side SGW, and definite business control nodes state, when business control nodes fault or link failure, re-routes backup server, and the IN service number is sent to backup server;
Described backup server is used to find and IN service number corresponding physical number, and described physical number is handed down to described soft switch;
Described soft switch is used for carrying out weight analysis according to the physical number of receiving and navigates to the callee side SGW.
10. soft switch fault-tolerance processing system comprises: soft switch, business control nodes, Calling Side SGW and callee side SGW, it is characterized in that,
Described soft switch, be used to receive information from the Calling Side SGW, and definite business control nodes operating state, when business control nodes fault or link failure, the initial address message that sends over according to original Calling Side SGW navigates to the callee side SGW.
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| CN100420205C true CN100420205C (en) | 2008-09-17 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2008064599A1 (en) | 2006-12-01 | 2008-06-05 | Huawei Technologies Co., Ltd. | Resuming method when called in msc pool, system and equipment thereof |
| WO2011103837A2 (en) * | 2011-04-19 | 2011-09-01 | 华为技术有限公司 | Method for processing packet when server fails and router thereof |
| CN102843263B (en) * | 2012-09-18 | 2015-02-04 | 浙江省电力公司 | Remote backup method for dispatcher station |
| CN107544867B (en) * | 2016-06-29 | 2023-07-21 | 南京中兴新软件有限责任公司 | Method, device and system for recovering intelligent network service |
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| CN1545345A (en) * | 2003-11-12 | 2004-11-10 | 中兴通讯股份有限公司 | Method for disaster recovery of mobile soft switch network |
| CN1677972A (en) * | 2004-04-02 | 2005-10-05 | 华为技术有限公司 | Method and system for duplicating medium flow in next-generation network |
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| WO2001052378A1 (en) * | 2000-01-12 | 2001-07-19 | Mci Worldcom, Inc. | Method and apparatus for providing reliable communications in an intelligent network |
| US6493442B1 (en) * | 2000-06-07 | 2002-12-10 | Ag Communication Systems Corporation | AIN triggers to invoke non-AIN features |
| CN1545345A (en) * | 2003-11-12 | 2004-11-10 | 中兴通讯股份有限公司 | Method for disaster recovery of mobile soft switch network |
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