CN101174936A - Wireless grouping redundant network system and method and redundant network equipment - Google Patents
Wireless grouping redundant network system and method and redundant network equipment Download PDFInfo
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Abstract
The present invention discloses the redundant system of the radio packet network comprising an access controller and a radio service supporting node SGSN; the system also comprises a network redundant equipment; the network redundant equipment is used for monitoring the working state of the SGSN, when the SGSN works normally, the interface data emitted by the access controller is transmitted to the SGSN; when the SGSN works abnormally, an E-SGSN substitutes the SGSN to work and provides access service for the access controller. The present invention also discloses a radio packet network redundancy method and a network redundancy equipment; by adopting the system and the method and the network redundant equipment, the network-level redundancy spare of the radio packet network can be realized without changing the present situation of the network equipment to promote the reliability of the radio packet network.
Description
Technical field
The present invention relates to the network redundancy technology, particularly a kind of radio packet network redundant system and method and network redundancy equipment.
Background technology
Along with mobile pocket data business use extensive gradually, the redundant technique of mobile packet network is subjected to common attention.At present, the GPRS that is widely used (GPRS) is a kind of wireless packet data service that provides on global system for mobile communications (GSM) radio open technical foundation.
In existing GPRS network, network can't provide reliable network level redundancy.Fig. 1 is the schematic diagram of existing GPRS network structure, as shown in Figure 1, several base station controllers (BSC) 110 are linked into a Serving GPRS Support Node (SGSN) 120, SGSN120 is linked into Gateway GPRS Support Node (GGSN) by Internet protocol (IP) backbone network, makes the mobile subscriber be linked into the internet.When the SGSN120 fault in the network, the BSC110 that inserts this SGSN120 all can't operate as normal, and the user in this moment this wireless coverage area can't use gprs service.
Current, the capacity of SGSN is all very big, usually at 50 general-purpose families between the 150 general-purpose families, a SGSN fault will cause a large number of users normally to use network, have a strong impact on the reliability of network.
In order to address this problem, 3rd Generation Partnership Project (3GPP) has defined the multi-to-multi agreement (Gb-Flex) of interface between a base station sub-system and the SGSN, and this agreement allows a BSC load sharing or active and standby a plurality of SGSN of access.When a SGSN fault, BSC can move normal SGSN access service by other, and this technology has strengthened the reliability of GPRS network greatly.
The Gb-Flex protocol definition of 3GPP tissue can be realized network redundancy in principle, but this scheme has two shortcomings, has caused it to be difficult to carry out in existing network:
1, this scheme requires the BSC in all existing networks to support new Gb-Flex standard, but the BSC that moves in the present existing network nearly all can't support this standard.Cost, the workload of carrying out the whole network upgrading in order to make BSC support the Gb-Flex standard all are inconceivable, so the Gb-Flex technology almost can't be applied on the net at the GPRS that has existed.
2, it is totally interconnected that this scheme requires the SGSN of BSC and its access, support this connected mode in the existing network in order to make, need transform the Gb Interface between existing base station sub-system and the SGSN, this almost is impossible for a large amount of existing BSC and transmission network.
Summary of the invention
In view of this, main purpose of the present invention is to propose a kind of radio packet network redundant system, realizes the network level redundancy of radio packet network.
Another object of the present invention is to provide a kind of radio packet network redundancy approach, realize the network level redundancy of radio packet network.
Another purpose of the present invention is to provide a kind of radio packet network redundance unit, realizes the network level redundancy of radio packet network.
In order to achieve the above object, technical scheme of the present invention is achieved in that
A kind of radio packet network redundant system, at least comprise access controller, ggsn SGSN, this system also comprises: the ggsn E-SGSN that is used to provide the network redundancy equipment of SGSN redundancy backup to strengthen
Described access controller sends to E-SGSN with interface data;
Described E-SGSN receives the interface data from access controller, and the operating state of monitoring SGSN, and when SGSN was working properly, E-SGSN was to SGSN forwarding interface data; When the SGSN operation irregularity, E-SGSN provides access service for access controller;
Described SGSN receives the interface data that E-SGSN transmits, for access controller provides access service.
A kind of radio packet network redundancy approach, this radio packet network comprise the network redundancy equipment E-SGSN that is used to provide the SGSN redundancy backup at least, and access controller and SGSN is characterized in that, the method comprising the steps of:
The operating state of A, E-SGSN monitoring SGSN, if SGSN is working properly, if execution in step B then is SGSN operation irregularity, then execution in step C;
B, E-SGSN are transmitted to SGSN with the interface data that access controller sends, and SGSN provides access service for access controller, process ends;
C, E-SGSN replace SGSN work, for access controller provides access service.
A kind of radio packet network redundance unit is characterized in that, comprises SGSN link management module, SGSN Link State monitoring module, link switching control module, network service entity module, wherein,
SGSN link management module sends querying command to SGSN Link State monitoring module, sends switching command to the link switching control module, send start or reset command to the network service entity module and receive the feedback information of above-mentioned module;
SGSN Link State monitoring module, the state of communication link between monitoring E-SGSN and the SGSN receives the querying command from SGSN link management module, and the communication link state between E-SGSN and the SGSN is fed back to SGSN link management module.
The link switching control module, be used for the link exchange control between access controller and the network redundancy equipment, receive the switching command of SGSN link management module, when SGSN is working properly, the link set of access controller is switched on the SGSN, when the SGSN operation irregularity, the link set of access controller is switched on the network service entity module;
The network service entity module, when SGSN is working properly, the network service entity module receives the starting command of SGSN link management module, replace this SGSN to provide access service for access controller, recover just often in SGSN work, the network service entity module receives the reset command of SGSN link management module, stops access service, resets to initial condition.
From such scheme as can be seen, because the present invention is under the situation that does not change existing radio packet network, network redundancy equipment is set in network, this network redundancy equipment is by the operating state of monitoring SGSN, when the SGSN operation irregularity, replace SGSN to realize network access facility, thereby avoided a large amount of existing networks is carried out upgrading, realized the network level redundancy backup of radio packet network, make radio packet network when equipment fault, still normally to move, thereby on the basis of existing network, the enforceable reliability that improves radio packet network.
Description of drawings
Fig. 1 is the schematic diagram of GPRS network structure in the prior art;
Fig. 2 is the schematic diagram of radio packet network redundant system structure embodiment one of the present invention;
Fig. 3 is the schematic diagram of the interface protocol structure among the radio packet network redundant system embodiment one of the present invention;
Fig. 4 is the structure chart of radio packet network redundance unit embodiment one of the present invention;
Fig. 5 is the flow chart of radio packet network redundancy approach embodiment one of the present invention;
Fig. 6 is the schematic diagram of radio packet network redundant system structure embodiment two of the present invention;
Fig. 7 is the schematic diagram of the interface protocol structure among the radio packet network redundant system embodiment two of the present invention;
Fig. 8 is the structure chart of radio packet network redundance unit embodiment two of the present invention;
Fig. 9 is the flow chart of radio packet network redundancy approach embodiment two of the present invention.
Embodiment
Core concept of the present invention is: by the operating state of the network redundancy monitoring of equipment SGSN that is provided with, when SGSN was working properly, network redundancy equipment was transmitted to SGSN with the interface data that access controller sends; When the SGSN operation irregularity, network redundancy equipment replaces former SGSN work, for access controller provides access service.
In the GPRS GPRS network, access controller is a base station controller BSC, and in Wideband Code Division Multiple Access (WCDMA) WCDMA network, access controller is a radio network controller (RNC).
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in more detail below in conjunction with embodiment.
Be that the present invention will be described for example below with the gprs system.
Fig. 2 is the schematic diagram of radio packet network redundant system structure embodiment one of the present invention, as shown in Figure 2, on the basis of original GPRS network structure, radio packet network redundant system of the present invention has increased the SGSN device (E-SGSN) 220 that network redundancy equipment promptly strengthens.When SGSN was working properly, E-SGSN220 received the interface data of BSC transmission and is transmitted to SGSN, is responsible for the access service of BSC by SGSN; When the SGSN operation irregularity, E-SGSN receives the interface data that BSC sends, and directly by IP backbone interface data is sent to GGSN, and then be linked into the internet, promptly be responsible for the access service of BSC, thereby replace SGSN work, realize the network level redundancy by E-SGSN.
In the GPRS redundant system, BSC at first inserts E-SGSN, and then is linked into SGSN by E-SGSN.As in original GPRS network, the one BSC and the 2nd BSC provide access service by a SGSN, after having increased E-SGSN, the one BSC and the 2nd BSC provide access service by E-SGSN by a SGSN, like this, if a SGSN is working properly, link management by E-SGSN, still provide service for a BSC and the 2nd BSC, and when a SGSN operation irregularity, provide service for a BSC and the 2nd BSC by E-SGSN by a SGSN.In like manner, the 3rd BSC provides access service by E-SGSN by the 2nd SGSN, repeats no more.
In Fig. 2, the protocol layer of the interface structure of BSC, E-SGSN, SGSN and information flow direction are with reference to figure 3.Fig. 3 is the schematic diagram of the interface protocol structure among the radio packet network redundant system embodiment one of the present invention, among Fig. 3, dashed double is represented the information flow direction under the normal condition, under normal circumstances, E-SGSN receives respectively from the Gb Interface packet of BSC and SGSN and at network service (NS) layer and directly transmits, as the data relay between BSC and the SGSN, at this moment, BSC obtains access service from SGSN; Information flow direction when the solid line double-head arrow is represented the SGSN operation irregularity, when E-SGSN monitors the SGSN operation irregularity, E-SGSN no longer transmits the access information of BSC and gives SGSN, but directly access information is sent to GGSN through E-SGSN by IP backbone, at this moment, BSC obtains access service from E-SGSN.
When application is of the present invention, can insert one or more E-SGSN in the radio packet network, an E-SGSN can insert an above BSC simultaneously, replaces the cut-in operation of one or more SGSN.
In embodiment illustrated in fig. 3 one, E-SGSN carries out forwarding of data at the NS layer, and this is a preferable examples of the present invention, does not limit application of the present invention, and the above-mentioned function of exchange of finishing at the NS layer can also realize by other functional layer, as frame relay (FR) layer etc.
Be example with the GPRS network below, introduce composition and the operation principle of network redundancy equipment E-SGSN in detail.
Fig. 4 is the structure chart of radio packet network redundance unit embodiment one of the present invention, as shown in Figure 4, E-SGSN is by SGSN Link State administration module 410, link switching control module 420, first base station controller network service entity (BSC-NSE) service module 430, the 2nd BSC-NSE service module 440 and SGSN link state monitoring module 450 are formed, wherein, SGSN Link State administration module 410 sends switching command to link switching control module 420, send startup or reset command to a BSC-NSE service module 430 and the 2nd BSC-NSE service module 440, send querying command to SGSN Link State monitoring module 450, and receive the feedback information of four modules, thereby to management with control the action of other four modules.
SGSN Link State monitoring module 450 is used to monitor the link communication state between SGSN and the E-SGSN, as the foundation of judging that SGSN is whether working properly.SGSN Link State administration module 410 obtains the link communication state between SGSN and the E-SGSN by inquiry SGSN Link State monitoring module 450.
The querying command that SGSN Link State monitoring module 450 receives from SGSN Link State administration module 410, and the link-state information between transmission E-SGSN and the SGSN is to SGSN Link State administration module 410.If the communication link state between E-SGSN and the SGSN is normal, then E-SGSN judges that the SGSN operating state is normal; If the communication link between E-SGSN and the SGSN is obstructed, then E-SGSN judges that the operating state of SGSN is unusual.
The function of SGSN Link State monitoring module 450 can be integrated in the SGSN Link State administration module 410, by the link communication state between SGSN Link State administration module 410 monitoring SGSN and the E-SGSN, as the foundation of judging that SGSN is whether working properly.
Store pre-configured BSC link set and SGSN link set in the link switching control module 420, be used to control the link switchover of BSC.When SGSN was working properly, link switching control module 420 received the switching command from SGSN Link State administration module 410, with the link switchover of BSC to corresponding SGSN; When the SGSN operation irregularity, the switching command that link switching control module 420 receives from SGSN Link State administration module 410, the link switchover of BSC to corresponding BSC-NSE service module, is guaranteed that BSC obtains access service by the SGSN or the BSC-NSE service module of correspondence.
The one BSC-NSE service module 430 and the 2nd BSC-NSE service module 440 by 410 controls of SGSN Link State administration module, are used to replace SGSN that the access service of BSC is provided; When the SGSN operation irregularity, the BSC-NSE service module receives the starting command from SGSN Link State administration module 410, replaces the SGSN of operation irregularity to provide access service for BSC; Recover just often when SGSN works, the BSC-NSE service module receives the reset command from SGSN Link State administration module 410, stops access service, restPoses.Wherein a BSC-NSE service module 430 replaces different SGSN that access service is provided respectively with the 2nd BSC-NSE service module 440, structure with reference to figure 2, E-SGSN is as a SGSN and the 2nd SGSN network redundancy equipment in the present embodiment, when a SGSN operation irregularity, replace a SGSN by a BSC-NSE service module 430, for BSC provides access service; When the 2nd SGSN operation irregularity, replace the 2nd SGSN by the 2nd BSC-NSE service module 440, for BSC provides access service;
The corresponding different SGSN of different BSC-NSE service module in the present embodiment, it only is preferred embodiment of the present invention, not in order to restriction the present invention, in radio packet network redundance unit of the present invention, can replace different SGSN by same BSC-NSE service module, for BSC provides access service.
Based on GPRS redundant system shown in Figure 4 and network redundancy equipment, the network redundancy method among the present invention is described.
Fig. 5 is the flow chart of radio packet network redundancy approach embodiment one of the present invention, and as shown in Figure 5, radio packet network redundancy approach step is as follows:
Step 510:E-SGSN obtains the link-state information of SGSN by the link communication state between self and the SGSN of monitoring, if the SGSN operation irregularity, execution in step 520, if SGSN is working properly, execution in step 530.
Step 520:E-SGSN switches to the BSC link set on the BSC-NSE service module among the E-SGSN; SGSN Link State administration module notice BSC-NSE service module starts service simultaneously.
Step 521:BSC-NSE service module sends the base station cell reset message to BSC.
Step 522:BSC resets and reporting subdistrict (CELL) information again, connects with the BSC-NSE service module.
Step 523:BSC obtains access service by E-SGSN, and flow process finishes.
Step 530:E-SGSN receives the Gb Interface packet from BSC and SGSN, and directly transmits at the NS layer, and BSC and SGSN are connected.
Step 531:SGSN provides the access service of BSC.
By above-mentioned steps as seen, after SGSN broke down, E-SGSN replaced the SGSN of fault that access service is provided.
After SGSN resumes work, the attendant can notify E-SGSN that SGSN is returned in link switchover respectively by maintenance command, the Link State administration module notice link swap table module of SGSN among the E-SGSN is switched the BSC link set to the SGSN that resumes work, and notify the BSC-NSE service module to reset, return to initial condition.E-SGSN transmits from the interface data of access controller and gives SGSN.
In embodiment illustrated in fig. 5 one, BSC can be one or more, and the SGSN of BSC correspondence can be one or more.In the above-mentioned steps, the function of exchange of finishing at the NS layer can be realized by other functional layer, as FR layer etc.
By the foregoing description one, radio packet network has been realized the network level redundancy.In order to improve the reliability of network, when being set, E-SGSN can two or more be set simultaneously.Be that example is described in detail with the situation that two E-SGSN are set simultaneously below.
Fig. 6 as shown in Figure 6, carries out information interaction by heartbeat signal between an E-SGSN and the 2nd E-SGSN for the schematic diagram of radio packet network redundant system structure embodiment two of the present invention.By two E-SGSN exchange separately and the link-state information between the SGSN, judge the operating state of SGSN.
But, when the link-state information between E-SGSN and SGSN shows that link is obstructed, might be that the link between E-SGSN and SGSN has problem, and SGSN be working properly.For fear of still switching in this case, when only the link that all monitors SGSN as two E-SGSN is obstructed, just judge the SGSN operation irregularity,, determine that then the SGSN operating state is normal if promptly the link communication state between two E-SGSN and the SGSN has at least one to be normal; If the communication link between two E-SGSN and the SGSN is all obstructed, determine that then the SGSN operating state is unusual.
To similar among the embodiment one, BSC is linked into the SGSN that served for this BSC originally by E-SGSN.With different among the embodiment one be, it is the SGSN of its service originally that a BSC can be linked into by two E-SGSN, and one is main E-SGSN in two E-SGSN equipment, and another is from E-SGSN.When the SGSN operation irregularity, replace SGSN to carry out access service by main E-SGSN, when main E-SGSN operation irregularity, by replace main E-SGSN to carry out access service from E-SGSN.In the present embodiment, a BSC610 is linked into a SGSN by an E-SGSN620 and the 2nd E-SGSN621 respectively.Suppose that an E-SGSN is the main E-SGSN of a SGSN, the 2nd E-SGSN be a SGSN from E-SGSN.Among Fig. 6, the signal flow that the solid line double-head arrow is represented the interface data that a BSC sends to.
When two E-SGSN all monitor between self and the SGSN630 Link State just often, a SGSN630 who determines a BSC correspondence is working properly, and an E-SGSN and the 2nd E-SGSN are forwarded to the interface data that a BSC610 sends on the one SGSN630;
When have only among two E-SGSN one monitor between self and the SGSN630 Link State just often, for example, have only the 2nd E-SGSN621 monitor between self and the SGSN630 Link State just often, judge that still a SGSN630 is working properly.Because the Link State between an E-SGSN620 and the SGSN630 is unusual, the one E-SGSN620 can't give a SGSN630 for BSC610 forwarding interface data, so an E-SGSN620 is transmitted to the 2nd E-SGSN621 with the interface data that receives, the interface data that the one BSC610 sends is transmitted to a SGSN630 by the 2nd E-SGSN621.Similarly, when have only an E-SGSN620 monitor between self and the SGSN Link State just often, the interface data from a BSC610 that the 2nd E-SGSN621 will receive is transmitted to an E-SGSN620, is carried out the forwarding of interface data by an E-SGSN620.
When two E-SGSN monitor Link State between self and the SGSN630 when all unusual, judge a SGSN630 operation irregularity, at first adopt main E-SGSN, promptly an E-SGSN inserts adapter, to be transmitted to an E-SGSN from a BSC610 interface data from E-SGSN, and replace a SGSN630 to be responsible for the access service of a BSC610 by an E-SGSN620; Simultaneously, the one E-SGSN620 and the 2nd E-SGSN621 are by heartbeat signal exchange operating state separately, when the 2nd E-SGSN621 monitors an E-SGSN620 when also breaking down, the 2nd E-SGSN621 replaces a SGSN630 to take over the access service of a BSC610, be about to a BSC610 and be linked on the 2nd E-SGSN621, be responsible for the access service of a BSC by the 2nd E-SGSN.
Similar the 2nd BSC611 is linked into the 2nd SGSN by an E-SGSN620 and the 2nd E-SGSN621 respectively.Among Fig. 6, the signal flow that dashed double is represented the interface data that the 2nd BSC611 sends to.The access procedure of the 2nd BSC611 is identical with the access procedure of a BSC610, does not repeat them here.
In embodiment two, the protocol layer of the interface structure of BSC, E-SGSN, SGSN and information flow direction are with reference to figure 7, Fig. 7 is the schematic diagram of the interface protocol structure among the radio packet network redundant system embodiment two of the present invention, with different among the embodiment one be, owing in the network two network redundancy equipment E-SGSN are arranged, between two network redundancy equipment E-SGSN, need to carry out the transmission of interface data.In embodiment two, two E-SGSN pass through the access information that suitable interface such as Gb and the exchange of IP conversion (Gb over IP) interface are sent by BSC.
When application is of the present invention, can insert two or more E-SGSN in the radio packet network, one of them is as main E-SGSN, and remaining conduct is from E-SGSN.
In the present embodiment two, the function of exchange of finishing at the NS layer also can be realized by other functional layer, as the FR layer.Carrying out transfer of data by Gb over IP interface between two E-SGSN, is a preferable examples of the present invention, does not limit the invention, and when application is of the present invention, can adopt other interfacing to realize.
In order to realize two transfer of data between the redundance unit, be provided with link set module and interface module in the network redundancy equipment provided by the invention.Be described in detail below in conjunction with Fig. 8.
Fig. 8 is the structure chart of radio packet network redundance unit embodiment two of the present invention, as shown in Figure 8, in main E-SGSN, comprise SGSN Link State administration module, SGSN link switching control module, the first and second BSC-NSE service modules, Gb over IP interface module; From E-SGSN, comprising SGSN Link State administration module, SGSN link switching control module, the first and second BSC-NSE service modules, Gb over IP interface module, BSC-NSE IP link set module.
SGSN Link State administration module is at main E-SGSN and be used to monitor the operating state of SGSN from E-SGSN, and control link switching control module and BSC-NSE service module.SGSN Link State administration module obtains the work state information of SGSN by the communication link state between monitoring E-SGSN and the SGSN, promptly realizes the function of SGSN Link State monitoring module; Send switching command to the link switching control module according to the different work state information of SGSN; When judging the SGSN operation irregularity, send starting command to the BSC-NSE service module, when judging that SGSN work recovers just often, sends reset command to the BSC-NSE service module.
The link switching control module is used for the switching of BSC link, in main E-SGSN, the link switching control module receives the switching command that comes from SGSN Link State administration module, when SGSN is working properly, the BSC link set is switched on the SGSN link set of BSC correspondence; When the SGSN operation irregularity, the BSC link set is switched on the BSC-NSE service module of BSC correspondence, thereby make BSC obtain access service; From E-SGSN, the link switching control module receives the switching command that comes from SGSN Link State administration module, when SGSN is working properly, the BSC link set is switched on the SGSN link set of BSC correspondence, when the SGSN operation irregularity, the BSC link set is switched on the BSC-NSE IP link set module, and then the BSC interface data is transmitted to main E-SGSN by Gb over IP interface module.
The BSC-NSE service module is used for the access service of BSC, in main E-SGSN, when the SGSN operation irregularity, receives the starting command from SGSN link management module, replaces the SGSN of operation irregularity to carry out access service.Recover just often in SGSN work, receive reset command, stop access service, restPose from SGSN link management module.The SGSN identical with the effect of BSC-NSE service module in the present embodiment among the radio packet network redundance unit embodiment one shown in Figure 4, that different BSC-NSE service modules is corresponding different does not repeat them here.
If main E-SGSN breaks down or operation irregularity,, promptly provide the access service of BSC by the BSC-NSE service module from E-SGSN by replace main E-SGSN work from E-SGSN.
In the present embodiment, the corresponding different SGSN of different BSC-NSE service modules only is preferred embodiment of the present invention, not in order to restriction the present invention, in radio packet network redundance unit of the present invention, can replace different SGSN by same BSC-NSE service module, for BSC provides access service.
Gb over IP interface module is used for the passing interface data between principal and subordinate E-SGSN.When the SGSN operation irregularity, Gb overIP interface module on main E-SGSN receives the BSC interface data of the Gb over IP interface module on E-SGSN, and interface data is sent to BSC-NSE service module on the main E-SGSN; Receive the BSC interface data that BSC-NSE IP link set module sends in E-SGSN in the Gb overIP interface module from E-SGSN, and interface data is transmitted to Gb over IP interface module on the main E-SGSN, thereby the BSC interface data that sends to from E-SGSN is forwarded on the main E-SGSN.
In the present embodiment, passing through Gb over IP interface module passing interface data between the principal and subordinate E-SGSN only is preferred embodiment of the present invention,, in the present invention, can also not pass through other interface module passing interface data between the principal and subordinate E-SGSN in order to restriction the present invention.
BSC-NSE IP link set module is used for the link switchover of BSC, from E-SGSN, when the SGSN operation irregularity, BSC-NSE IP link set module receives the interface data that BSC sends, and the Gb over IP interface module that interface data sends to from the E-SGSN is transmitted.
Based on GPRS redundant system shown in Figure 8 and network redundancy equipment, the network redundancy method among the present invention is described.
Fig. 9 is the flow chart of radio packet network redundancy approach embodiment two of the present invention, as shown in Figure 9, exists the network redundancy method step of two E-SGSN as follows:
Step 910: exchange separately and the link-state information between the SGSN between two E-SGSN, judge according to mutual link-state information whether SGSN work is normal, if link-state information all shows when the communication link between two E-SGSN and the SGSN goes wrong, judge the SGSN operation irregularity, execution in step 920; Otherwise SGSN is working properly, execution in step 930.
Step 920: main E-SGSN switches to the BSC-NSE service module on the main E-SGSN with the BSC link set and notifies this BSC-NSE service module to start service, and main simultaneously E-SGSN switches to the BSC link set on the main E-SGSN from E-SGSN by the heartbeat signal notice.
Step 921: receive the link switchover order of autonomous E-SGSN from E-SGSN, the BSC link set is switched on this BSC-NSE IP link set module from the E-SGSN, interface data is transmitted to Gb over IP module on the main E-SGSN by Gb over IP module.
Step 922: the data forwarding that main E-SGSN will send from E-SGSN by self Gb over IP module is to the BSC-NSE service module.
Step 923: the BSC-NSE service module on the main E-SGSN sends reset message to the BSC that inserts, as sending the CELL reset message.
Step 924:BSC resets and reporting base station cell information again, connects with the BSC-NSE service module.
Step 925:BSC obtains access service by E-SGSN.Process ends.
Step 930: the interface data of BSC is sent to main E-SGSN from E-SGSN.
In this step, carry out forwarding of data by self BSC-NSE IP module and Gb over IP module from E-SGSN.
Step 931: main E-SGSN transmits the BSC interface data and gives SGSN, and BSC and SGSN are connected.
Step 932:SGSN provides the access service of BSC.
By above-mentioned steps as seen, after SGSN broke down, main E-SGSN replaced the SGSN of fault that access service is provided.
After SGSN resumes work, the attendant can notify main E-SGSN respectively and from E-SGSN SGSN be returned in link switchover by maintenance command, the Link State administration module notice link swap table module of main E-SGSN and the SGSN from E-SGSN is switched the BSC link set to the SGSN that resumes work, and notify the BSC-NSE service module to reset, return to initial condition.Main E-SGSN and transmit respectively from the interface data of access controller from E-SGSN and to give SGSN.
In present embodiment two, two E-SGSN are with master-slave mode work.In the present invention, can be two or more with the E-SGSN of master-slave mode work, and two or more E-SGSN be not limited to principal and subordinate's load sharing working method.
The foregoing description is applied to GPRS network, realizes the network level redundancy of GPRS network.The present invention can also be used in other radio packet network, in Wideband Code Division Multiple Access (WCDMA) (WCDMA) network.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (19)
1. radio packet network redundant system, at least comprise access controller, ggsn SGSN is characterized in that, this system also comprises: the ggsn E-SGSN that is used to provide the network redundancy equipment of SGSN redundancy backup to strengthen
Described access controller sends to E-SGSN with interface data;
Described E-SGSN receives the interface data from access controller, and the operating state of monitoring SGSN, and when SGSN was working properly, E-SGSN was to SGSN forwarding interface data; When the SGSN operation irregularity, E-SGSN provides access service for access controller;
Described SGSN receives the interface data that E-SGSN transmits, for access controller provides access service.
2. system according to claim 1 is characterized in that described E-SGSN comprises two or more, is undertaken alternately by heartbeat signal between each E-SGSN.
3. system according to claim 2 is characterized in that, an E-SGSN is main E-SGSN among the described E-SGSN, and remaining E-SGSN is from E-SGSN.
4. system according to claim 3 is characterized in that, when the SGSN operation irregularity, describedly will be transmitted to described main E-SGSN from the interface data of access controller from E-SGSN, provides access service by main E-SGSN for access controller.
5. system according to claim 1 is characterized in that: described radio packet network is GPRS GPRS network or Wideband Code Division Multiple Access (WCDMA) WCDMA network;
Described access controller is base station controller BSC or radio network controller (RNC).
6. radio packet network redundancy approach, this radio packet network comprises the network redundancy equipment E-SGSN that is used to provide the SGSN redundancy backup at least, and access controller and SGSN is characterized in that, and the method comprising the steps of:
The operating state of A, E-SGSN monitoring SGSN, if SGSN is working properly, if execution in step B then is SGSN operation irregularity, then execution in step C;
B, E-SGSN are transmitted to SGSN with the interface data that access controller sends, and SGSN provides access service for access controller, process ends;
C, E-SGSN replace SGSN work, for access controller provides access service.
7. method according to claim 6 is characterized in that, the method for the monitoring of E-SGSN described in steps A SGSN operating state is:
Communication link state between described E-SGSN monitoring self and the SGSN if the communication link between E-SGSN and the SGSN is working properly, judges that then SGSN is working properly; If the communication link operation irregularity between E-SGSN and the SGSN is then judged the SGSN operation irregularity.
8. method according to claim 6 is characterized in that described E-SGSN comprises two or more, and the method for the monitoring of E-SGSN described in steps A SGSN operating state is:
Communication link state between described each E-SGSN between exchange self and the SGSN when the communication link between whole E-SGSN and the SGSN all breaks down, is determined the SGSN operation irregularity.
9. method according to claim 6 is characterized in that, the method for the forwarding interface of E-SGSN described in step B data is: described E-SGSN is transmitted to SGSN at network service NS layer with interface data.
10. method according to claim 6 is characterized in that, described step B takes a step forward and comprises:
And the E-SGSN that the communication link between the described SGSN breaks down, will be transmitted to from the interface data of described access controller and this SGSN between communication link E-SGSN working properly.
11. method according to claim 6 is characterized in that, E-SGSN described in the step C replaces the method for SGSN work to be:
C1, described E-SGSN switch to the link set of SGSN operation irregularity prerequisite for the access controller of access service on the E-SGSN from SGSN;
C2, described E-SGSN start service, and send reset message to access controller;
C3, described access controller reset and report interface data to main E-SGSN;
C4, described E-SGSN provide access service for access controller.
12. method according to claim 6 is characterized in that, described E-SGSN comprises that a main E-SGSN and one or more from E-SGSN, specifically comprise among the step C:
C5, described main E-SGSN switch to main E-SGSN with the link set of access controller, and main E-SGSN receives the interface data that access controller sends;
C6, describedly the link set of access controller is switched to from E-SGSN, will be transmitted to main E-SGSN from the interface data of access controller from E-SGSN from E-SGSN.
C7, described main E-SGSN start service, and send reset message to access controller;
C8, described access controller reset and report interface data to main E-SGSN;
C9, main E-SGSN provide access service for access controller.
13. method according to claim 12 is characterized in that, the agreement of using from forwarding interface data between E-SGSN and the main E-SGSN described in the step C6 is Gb Interface agreement and Internet protocol translation-protocol Gb over IP interface protocol.
14. method according to claim 6 is characterized in that, after described SGSN recovered operate as normal, this method further comprised:
D1, described E-SGSN with the link switchover of access controller to SGSN;
D2, described E-SGSN transmit from the interface data of access controller and give SGSN.
15. method according to claim 6 is characterized in that, described E-SGSN comprises a main E-SGSN and one or more from E-SGSN, and after described SGSN recovered operate as normal, this method further comprised:
D3, described main E-SGSN with the link switchover of access controller to SGSN;
D4, describedly the link of access controller is switched to SGSN from main E-SGSN from E-SGSN;
D5, described main E-SGSN and described the forwarding respectively from the interface data of access controller from E-SGSN are given SGSN.
16. a radio packet network redundance unit is characterized in that, comprises SGSN link management module, SGSN Link State monitoring module, link switching control module, network service entity module, wherein,
SGSN link management module sends querying command to SGSN Link State monitoring module, sends switching command to the link switching control module, send start or reset command to the network service entity module and receive the feedback information of above-mentioned module;
SGSN Link State monitoring module, the state of communication link between monitoring E-SGSN and the SGSN receives the querying command from SGSN link management module, and the communication link state between E-SGSN and the SGSN is fed back to SGSN link management module.
The link switching control module, be used for the link exchange control between access controller and the network redundancy equipment, receive the switching command of SGSN link management module, when SGSN is working properly, the link set of access controller is switched on the SGSN, when the SGSN operation irregularity, the link set of access controller is switched on the network service entity module;
The network service entity module, when SGSN is working properly, the network service entity module receives the starting command of SGSN link management module, replace this SGSN to provide access service for access controller, recover just often in SGSN work, the network service entity module receives the reset command of SGSN link management module, stops access service, resets to initial condition.
17. radio packet network redundance unit according to claim 16, it is characterized in that, described radio packet network redundance unit provides redundancy backup for two or more SGSN, described network service entity module comprises two or more, respectively corresponding described two or more SGSN, when the SGSN of correspondence operation irregularity, the network service entity module replaces corresponding SGSN to provide access service for access controller.
18. radio packet network redundance unit according to claim 16 is characterized in that this equipment further comprises the link set module,
Described link set module receives the interface data from access controller, and this interface data is transmitted to interface module;
When the SGSN operation irregularity, described link switching control module switches to the link set module with the link set of access controller.
19. according to claim 16 or 18 described radio packet network redundance units, it is characterized in that this equipment further comprises interface module,
Described interface module, when the SGSN operation irregularity, reception is from the interface data of the access controller of other radio packet network redundance unit, and the interface data that receives is transmitted to the network service entity module or receives interface data, and the interface data that receives is transmitted to other radio packet network redundance unit from the access controller of link set module.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102300231A (en) * | 2010-06-22 | 2011-12-28 | 中兴通讯股份有限公司 | Packet service monitoring method and device |
| CN101594190B (en) * | 2008-05-30 | 2013-06-05 | 华为技术有限公司 | Power system time synchronization method and device and power system thereof |
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Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| EP1128685B1 (en) * | 2000-02-22 | 2006-08-30 | Lucent Technologies Inc. | Method for handover of real-time calls in wireless communication systems |
| CN100518097C (en) * | 2004-04-12 | 2009-07-22 | 北京北方烽火科技有限公司 | Simple detection method for GGSN facilities |
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| CN101594190B (en) * | 2008-05-30 | 2013-06-05 | 华为技术有限公司 | Power system time synchronization method and device and power system thereof |
| CN102300231A (en) * | 2010-06-22 | 2011-12-28 | 中兴通讯股份有限公司 | Packet service monitoring method and device |
| CN108933998A (en) * | 2018-07-02 | 2018-12-04 | 南京兴鼎升电气设备有限公司 | A kind of implementation method of the redundant wireless link protocol based on terminal device |
| CN109756899A (en) * | 2019-03-22 | 2019-05-14 | 深圳市珍爱云信息技术有限公司 | Method for connecting network, device, computer equipment and storage medium |
| CN109756899B (en) * | 2019-03-22 | 2022-03-22 | 深圳市珍爱云信息技术有限公司 | Network connection method, device, computer equipment and storage medium |
| CN112737844A (en) * | 2020-12-28 | 2021-04-30 | 浙江中控技术股份有限公司 | Method and device for switching between main and standby in redundant system |
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