CN100463538C - Method and system for improving reliability of soft switch using off-site backup - Google Patents
Method and system for improving reliability of soft switch using off-site backup Download PDFInfo
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- CN100463538C CN100463538C CNB2003101152728A CN200310115272A CN100463538C CN 100463538 C CN100463538 C CN 100463538C CN B2003101152728 A CNB2003101152728 A CN B2003101152728A CN 200310115272 A CN200310115272 A CN 200310115272A CN 100463538 C CN100463538 C CN 100463538C
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Abstract
The invention discloses a method and system to use distant backup to enhance reliability of a soft exchanger, firstly two mutual master-backup distant soft exchangers set their user data, when terminal device is installed, set a master soft exchange address pointing to local soft exchanger and a backup soft exchange address pointing to backup soft exchanger and regularly register with the local soft exchanger: if the register fails, register with the backup soft exchanger, and after succeeding in register, let the backup soft exchanger process the call, where according to preconfigured user data, the soft exchanges make continuous control on the calls from their respective local or distant registering terminal users. By using this invention, if some soft exchanger in the soft exchange network has partial or complete failure, we can use the corresponding backup soft exchanger to replace it to continue working and it can implement distant disaster recovery backup between different exchangers.
Description
Technical field
The present invention relates to the maintaining method of a kind of soft switchcall server and reliability thereof, specifically, relate to the method and system of a kind of soft switch (SoftSwitch) machine backup.
Background technology
Flexible exchanging network is made up of edge access layer, key-course and service application layer, wherein edge access layer comprises AG (IAD), SG (SGW), TG (Trunk Media Gateway), IAD (integrated access equipment), the networking telephone or the like equipment, key-course comprises SoftSwitch, and service application layer comprises various application servers.Soft exchanging network network element in above-mentioned each layer couples together by the IP bearer network.
SoftSwitch (SS, Soft Switch) is the nucleus equipment of flexible exchanging network, also is one of visual plant of Next Generation Telecommunication Networks network.It is independent of the bottom bearing protocol, mainly finishes major functions such as call control resource distribution, protocol processes, route authentication, charging, and all business and third party's business that can provide the available circuit switch to provide to the user.Pass through H.248 protocol communication between the equipment of SoftSwitch and edge access layer, the SoftSwitch interoffice adopts Session Initiation Protocol communication.Under the control of SoftSwitch, transmit various Media Streams such as user's voice, data, video between the edge access layer equipment by Real-time Transport Protocol.
Be in the next generation network of core with the Softswitch technology, the capacity of soft switch is all very huge, single device will be supported users up to a million, in case because of reasons such as power breakdown, natural calamity, network failures, this SoftSwitch goes wrong, then the business of all voice of all users of this SoftSwitch control, video, data all can't be carried out, and influences huge.Thereby, need a kind of method that realizes the disaster-tolerant backup of SoftSwitch, for making things convenient for telecom operators' networking operation, need the backup between the support xenogenesis SoftSwitch (equipment that different manufacturers is produced) simultaneously.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of method of utilizing remote backup to improve the SoftSwitch reliability, can realize the disaster-tolerant backup of SoftSwitch, when guaranteeing that a SoftSwitch breaks down, the SoftSwitch of another backup can be taken over automatically and finish relevant calling control.The present invention also will provide a kind of soft switchcall server of realizing the SoftSwitch remote backup.
In order to solve above technical problem, the invention provides a kind of method of utilizing remote backup to improve the SoftSwitch reliability, be applied to have at least in the soft switchcall server of two active and standby each other strange land SoftSwitches, and between the terminal equipment of two places, all can pass through the mutual communication of bearer network between terminal equipment and the described SoftSwitch, this method may further comprise the steps:
(a) on every active and standby each other strange land SoftSwitch, all user's data of two places are set, and realize data sync;
(b) when the installing terminal equipment of two places, set a master who points to local soft switch and use the soft switch address, and a backup soft switch address of pointing to the backup SoftSwitch;
(c) terminal equipment is regularly to the local soft switch registration, if the registration failure number of times reaches set point, then changed course backup SoftSwitch registration, its calling of back of succeeding in registration change by the backup SoftSwitch to be handled;
(d) described active and standby each other strange land SoftSwitch according to the user data of prior setting, is realized call proceeding to the call request the terminal use of the local and remote of this machine registration.
In the said method, described step (a) also comprises step afterwards: when described active and standby each other strange land SoftSwitch interoffice communication was broken down, wherein the affiliated terminal equipment of SoftSwitch notice was to the registration of backup SoftSwitch.
In order to realize the backup between the xenogenesis SoftSwitch, in the said method, in the described step (a), to the user data configuration of described every strange land SoftSwitch be that network management center realizes by network management interface synchronously.
In the said method, in the described step (d), when described active and standby each other strange land SoftSwitch receives the strange land Client-initiated call request of registration, if called be the local user, directly continue in this locality.
In the said method, in the described step (d), when described active and standby each other strange land SoftSwitch receives the strange land Client-initiated call request of this machine of being registered in, if called also is the strange land user, route calls to office direction earlier, the SoftSwitch by the strange land is called out the called subscriber, the failure or when can not find the called the user if office direction continues, again calling is re-routed this locality, at local complete connection.If system has detected the interoffice fault, when then described active and standby each other strange land SoftSwitch receives the strange land Client-initiated call request of this machine of being registered in, if called also be the strange land user, directly continue in this locality.
In order to solve the problems of the technologies described above, the soft switchcall server of realizing the SoftSwitch remote backup provided by the invention, comprise at least two active and standby each other strange land SoftSwitches, and between the terminal equipment of two places, all can pass through the mutual communication of bearer network between terminal equipment and the described SoftSwitch, wherein:
All has a database that comprises the two places all customer data on every described active and standby each other strange land SoftSwitch;
In the terminal equipment of described two places, all there is one to point to the main of local soft switch with soft switch address and a backup soft switch address of pointing to the backup SoftSwitch, and also has a registration control unit, be used for regularly registering to the SoftSwitch of this locality, if the registration failure number of times reaches set point, then changed course backup SoftSwitch registration, its calling of back of succeeding in registration change by the backup SoftSwitch to be handled;
The Call Control Unit of described active and standby each other strange land SoftSwitch is used for the call request the terminal use of the local and remote of this machine registration, carries out call proceeding according to the described database of this machine.
In order to realize the backup between the xenogenesis SoftSwitch, said system can adopt network management center that described active and standby each other strange land SoftSwitch is carried out user data configuration and data sync.
In the said system, the registration control unit in the described terminal equipment also is used for after receiving the registration switching command of local soft switch, to the registration of backup SoftSwitch.
As from the foregoing, method and system of the present invention, guaranteed that flexible exchanging network has advantages of higher stability and reliability, in case local fault or complete failure appear in certain SoftSwitch in the flexible exchanging network, can take over its work by the backup SoftSwitch in the network, thereby guarantee the normal operation of communication network.And after adopting network management center that two SoftSwitches are carried out data maintenance, telecommunications operator can adopt the SoftSwitch of different manufacturers to realize disaster-tolerant backup, is convenient to the networking operation.
Description of drawings
Fig. 1 is the structure chart that operator makes up the soft switch communication network.
Fig. 2 is that the networking signal of operator's flexible exchanging network reaches with the schematic diagram of calling out between the user of city.
Fig. 3 is the schematic diagram of calling out between two urban subscribers.
Fig. 4 is the flow chart that terminal equipment (IAD) automatically switches to the backup soft switch.
Fig. 5 is when a SoftSwitch all lost efficacy, the calling schematic diagram of disaster-tolerant backup.
Fig. 6 is when local fault appears in a SoftSwitch, the calling schematic diagram of disaster-tolerant backup.
Fig. 7 is SS 1 fault, and IAD 2 calls out the flow chart that continues of IAD 3 by SS 2.
Fig. 8 is SS 1 fault, and IAD 2 calls out the flow chart that continues of IAD 1 by SS 2.
Embodiment
Fig. 1 is the structure chart of embodiment of the invention flexible exchanging network.As shown in the figure, operator has at first made up a broadband IP data network that covers A, two cities of B, respectively place a SoftSwitch SS 1 and SS 2 in two cities of A, B again, these two SoftSwitches can not be same manufacturer production, put dress IAD user in two cities according to user's actual needs, IAD 1 and IAD 2 are put dress in the A city among the figure, and IAD 3 and IAD 4 are put dress in the B city, all link to each other by IP network between each SoftSwitch and each IAD.In addition, also have an AS of centralized maintenance network management center that links to each other with SS 2 with SS 1, realize SS 1 and SS 2 unified operation maintenance are managed.
The concrete networking diagram of operator as shown in Figure 2, the IAD in two cities of A, B communicates by letter with the SoftSwitch in this city by agreement H.248, under the normal condition, the incity call of a city is by this incity, city SoftSwitch control.For example, the calling of IAD 1 to IAD 2, earlier be connected to SS1 by IAD 1, be connected to IAD 2 (as shown by arrows) by SS 1 again, CCF is finished by SS 1, and under the guidance of SS 1, IAD 1 holds and communicating by letter of holding with IAD 2, IAD 1 is converted to the packet (RTP Media Stream) that adopts the IP agreement with the media information current that inserts, and is sent to IAD 2 by IP network.
By Session Initiation Protocol communication, Session Initiation Protocol is the standard agreement of the interconnection and interflow between a kind of SoftSwitch, can be used for the intercommunication of xenogenesis SoftSwitch between the SoftSwitch SS 1 in A, two cities of B and the SS 2, thereby realizes two trunk calls between the city.
Under the normal condition, the call proceeding process of IAD 1 to IAD 3 is connected to SS1 by IAD 1 earlier shown in the arrow among Fig. 3, be connected to SS2 by SS1 by Session Initiation Protocol again, is connected to IAD 3 by SS2 at last.
In the present embodiment, operator adopts SS 1 and SS 2 disaster-tolerant backup modes for guaranteeing the reliability service of network.By network management center A, all user's data of B two cities are set simultaneously on SS 1 and SS 2, guarantee that SS1 and SS2 can handle two all users' of city calling respectively alone.When certain user's data need be revised, the data of this user in SS1 and SS2 were revised simultaneously by the standard network interface tube by network management center.If the user data synchronization between above-mentioned two switches realizes that by making up a unified database interface of SoftSwitch and this database will be privately owned, can't realize the backup between the xenogenesis soft switch.Present embodiment adopts network management interface to operate the backup that then can realize between the xenogenesis soft switch.
When realizing a SoftSwitch fault, user under it can backup on its backup SoftSwitch, at first require all terminal equipments will set the soft switch address of a main usefulness when mounted, be used for calling out normally communication, set the soft switch address of a backup again, be used for the communication when unusual.Main with and backup soft switch address correspond respectively to one and mainly back up SoftSwitch with SoftSwitch and one.Under normal circumstances, the IAD user in A city (as IAD 1～IAD 2) is in SS 1 registration, and associated call is handled by SS 1, and the soft switch address of its main usefulness is made as SS 1, and the soft switch address of backup is made as SS 2; And the IAD user in B city (as IAD 3～IAD 4) registers at SS 2, and associated call is handled by SS 2, and the soft switch address of its main usefulness is made as SS 2, and backup soft switch address is made as SS 1.
The switching of the IAD of the embodiment of the invention has dual mode, and a kind of IAD of being finds to get in touch auto switching between active and standby SoftSwitch with SoftSwitch; A kind of is that SoftSwitch notice IAD switched when situation such as interoffice fault took place.When interrupting as the communication generation of SS 1 and SS 2, SS 1 IAD of notice SS 1 this locality automatically switches to (SS 1 and SS 2 can not set this function simultaneously) on the SS 2.After trouble shooting, SS 1 also can notify local IAD to switch back again.
In order to realize that terminal is in the main automatic switchover of using and backing up between the SoftSwitch, under the normal situation of user terminal IAD, even IAD is idle, also regularly carry out the communication contact of shaking hands to the SoftSwitch of main usefulness, in case shaking hands, communication fails for 3 times, IAD automatically switch main with and the soft switch address of backup, beginning is to the backup soft switch contact of shaking hands.Wherein concrete flow chart may further comprise the steps as shown in Figure 4:
Whether step 170 is judged to main successful with the SoftSwitch registration, if, return execution in step 100, otherwise execution in step 130.
During SS 1 local fault, if the office direction communication is normal, a part of IAD is behind SS 1 registration failure, can be to SS 2 registrations, and communicating by letter between another part IAD and the SS 1 then may be normally, as shown in Figure 6.It is normal to communicate by letter between SS 1 and the SS 2 among the figure, and IAD 1 still is registered on the SS 1, and IAD 2 is registered on the SS 2.
Fig. 7 is SS 1 fault (whole or local), and after IAD 2 was registered to SS 2, IAD 2 may further comprise the steps to the flow chart of IAD3 call proceeding:
Step 200, IAD 2 is registered to SS 2;
Step 210, IAD 2 connects SS 2, and request makes a call;
Step 220, SS 2 allows IAD 2 to call out according to the user data of the IAD 2 that is provided with in advance;
Step 230, SS 2 judges that the IAD 3 that IAD 2 call out is local users, directly this locality IAD3 that continues finishes the call proceeding flow process.
The arrow on right side shows the process of its call proceeding among Fig. 5.
Fig. 8 is SS 1 fault (whole or local), and after IAD 2 was registered to SS 2, IAD 2 may further comprise the steps to the flow chart of IAD1 call proceeding:
Step 360 judges whether to find IAD 1, if, carry out next step, otherwise, execution in step 380 (can judge that IAD 1 registers on its backup SoftSwitch, be local SS 2 here);
IAD 2 continues shown in left side arrow among Fig. 5 through SS's 2 to IAD 1, and IAD 2 continues shown in the arrow among Fig. 6 through SS 2, SS's 1 to IAD 1.
Each step of above-mentioned flow process is not to be changeless, if system has detected SS 1 and SS 2 interoffices can't communication the time, can initiatively require the user of SS 1 (or SS 2) to switch, be registered on the SS 2, corresponding, in step 330, after SS 2 judges that the IAD 1 of IAD 2 callings is the user of SS 1, whether can directly check IAD 1 in this locality registration, if register, then IAD1 and IAD 2 continue in this locality.
Though the foregoing description is to be example with IAD, from seeing that in logic terminal equipments such as AG, TG, the networking telephone all are the same with IAD, just the capacity difference also can adopt the inventive method to handle.
In addition, in system of the present invention, the number of SoftSwitch can be more than 2, under the situation of a plurality of SoftSwitches, can make up active and standby each other in twos, as long as can hold end communication by bearer network between the user of active and standby each other SoftSwitch, can adopt remote backup method of the present invention.As for three and the active and standby each other situation of above strange land SoftSwitch, should be considered as the present invention and make up the repeatedly use of active and standby method each other in twos.
Pass through said method, guaranteed that flexible exchanging network has advantages of higher stability and reliability, in case local fault or complete failure appear in certain soft switch in the flexible exchanging network, can take over its work by other soft switch in the network, thereby guarantee the normal operation of communication network.Telecommunications operator can adopt the SoftSwitch of different manufacturers to realize disaster-tolerant backup, is convenient to the networking operation.
Claims (10)
1. utilize remote backup to improve the method for SoftSwitch reliability, be applied to have at least in the soft switchcall server of two active and standby each other strange land SoftSwitches, and between the terminal equipment of two places, all can pass through the mutual communication of bearer network between terminal equipment and the described active and standby each other strange land SoftSwitch, this method may further comprise the steps:
(a) on every active and standby each other strange land SoftSwitch, all user's data of two places are set, and realize data sync;
(b) when the installing terminal equipment of two places, set a master who points to local soft switch and use the soft switch address, and a backup soft switch address of pointing to the backup SoftSwitch;
(c) terminal equipment is regularly to the local soft switch registration, if the registration failure number of times reaches set point, then changed course backup SoftSwitch registration, its calling of back of succeeding in registration change by the backup SoftSwitch to be handled;
(d) described active and standby each other strange land SoftSwitch according to the user data of prior setting, is realized call proceeding to the call request the terminal use of the local and remote of this machine registration.
2. the method for claim 1, it is characterized in that, described step (a) also comprises step afterwards: when described active and standby each other strange land SoftSwitch interoffice communication was broken down, wherein the affiliated terminal equipment of SoftSwitch notice was to the registration of backup SoftSwitch.
3. the method for claim 1 is characterized in that, in the described step (a), to the configuration of the user data of described every active and standby each other strange land SoftSwitch be that network management center passes through the standard network interface tube and realizes synchronously.
4. the method for claim 1 is characterized in that, in the described step (d), when described active and standby each other strange land SoftSwitch receives the strange land Client-initiated call request of registration, if called be the local user, directly continue in this locality.
5. the method for claim 1, it is characterized in that, in the described step (d), when described active and standby each other strange land SoftSwitch receives the strange land Client-initiated call request of this machine of being registered in, if called also be the strange land user, route calls to office direction earlier, SoftSwitch by the strange land is called out the called subscriber, the failure or when can not find the called the user if office direction continues re-routes this locality to calling, again at local complete connection.
6. method as claimed in claim 2, it is characterized in that, after described system detects the interoffice fault, when described active and standby each other strange land SoftSwitch receives the strange land Client-initiated call request of this machine of being registered in, if called also is the strange land user, directly continue in this locality.
7. the soft switchcall server that can realize the SoftSwitch remote backup, comprise at least two active and standby each other strange land SoftSwitches, and between the terminal equipment of two places, all can pass through the mutual communication of bearer network between terminal equipment and the described active and standby each other strange land SoftSwitch, it is characterized in that:
All has a database that comprises the two places all customer data on every described active and standby each other strange land SoftSwitch;
In the terminal equipment of described two places, all there is one to point to the main of local soft switch with soft switch address and a backup soft switch address of pointing to the backup SoftSwitch, and also has a registration control unit, be used for regularly registering to the SoftSwitch of this locality, if the registration failure number of times reaches set point, then changed course backup SoftSwitch registration, its calling of back of succeeding in registration change by the backup SoftSwitch to be handled;
The Call Control Unit of described active and standby each other strange land SoftSwitch is used for the call request the terminal use of the local and remote of this machine registration, carries out call proceeding according to the described database of this machine.
8. soft switchcall server as claimed in claim 7 is characterized in that, also comprises a network management center, is used for by network management interface described active and standby each other strange land SoftSwitch being carried out user data configuration and data sync.
9. soft switchcall server as claimed in claim 7 is characterized in that, the registration control unit in the described terminal equipment also is used for after receiving the registration switching command of local soft switch, to the registration of backup SoftSwitch.
10. soft switchcall server as claimed in claim 8 is characterized in that, adopts the Session Initiation Protocol communication between the active and standby each other strange land SoftSwitch, and adopts the standard network interface tube, is used to realize the data sync of xenogenesis SoftSwitch.
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| CNB2003101152728A CN100463538C (en) | 2003-11-27 | 2003-11-27 | Method and system for improving reliability of soft switch using off-site backup |
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| CN100463538C true CN100463538C (en) | 2009-02-18 |
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| CN101202667B (en) * | 2007-12-10 | 2010-04-21 | 中兴通讯股份有限公司 | Method for sharing disaster tolerance resource |
| CN101383734B (en) * | 2008-10-20 | 2012-06-27 | 华为技术有限公司 | State detecting method, system and apparatus |
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