CN106982451A - A kind of fault recovery method and system - Google Patents

Abstract

This application discloses a kind of fault recovery method and system, wherein method includes：Gateway SGW in track traffic region detects whether the public data network gateway PGW linked with this SGW is abnormal in real time；When detecting abnormal PGW, the SGW triggers corresponding mobility management entity MME and is bound the static ip address of user equipment (UE) with local PGW, wherein, the UE is the UE being attached in the SGW overlay areas on the abnormal PGW, the MME that it is currently the UE services that the MME, which is,.Using the present invention, it is possible to achieve the fault recovery under track traffic thread-changing hand-over scenario.

Description

A kind of fault recovery method and system

Technical field

The present invention relates to mobile communication technology, the thread-changing of more particularly to a kind of track traffic transfer fault recovery method and System.

Background technology

The vehicle-mounted user equipment (UE) of LTE system has its special demand on application in track transportation, as vehicle-mounted UE In cross-line, across office operation, generally by the way of local route (Home-Routed), to ensure business continuity Property and STATIC IP ADDRESSING.In this mode, even if terminal thread-changing is run, its public data network gateway (PGW) Keep constant, if the PGW breaks down, UE can be caused unreachable, train communication system is interrupted, it is impossible to just Often operation.

Existing 3GPP PGW fault recovery modes, by the way of dynamic IP addressing distribution, and need not The scene backed up with EPC, therefore, it is impossible to carry out fault recovery applied to track traffic scene.

The content of the invention

In view of this, it is a primary object of the present invention to provide a kind of fault recovery method and system, it is possible to achieve track Fault recovery under traffic thread-changing hand-over scenario.

In order to achieve the above object, technical scheme proposed by the present invention is：

A kind of fault recovery method, including：

Gateway SGW in track traffic region detects whether the PGW linked with this SGW is abnormal in real time；

When detecting abnormal PGW, the SGW triggers corresponding mobility management entity MME by user equipment UE static ip address is bound with local PGW, wherein, the UE is that the SGW overlay areas are included The UE on the abnormal PGW, the MME that it is currently the UE services that the MME, which is,.

A kind of fault recovery system, including：Gateway SGW, public data network gateway PGW, mobile management Entity MME and user equipment (UE)；Wherein,

The SGW, in track traffic region, for detecting whether the PGW linked with this SGW is different in real time Often；

The MME, for when the SGW detects abnormal PGW, will be attached to by SGW triggerings The static ip address of UE on the abnormal PGW is bound with local PGW, wherein, the UE is described The UE being moved in the SGW overlay areas of MME services.

In summary, in fault recovery method proposed by the present invention and system, the SGW in track traffic region is to institute Each PGW of link is detected that triggering will be attached thereto in one's respective area when detecting abnormal PGW in real time UE is bound with local PGW, and service is provided for the UE in track traffic region using local PGW.In this way, It can effectively solve to cause the problem of UE communication is interrupted when the PGW accompanying by UE breaks down, so as to realize The fault recovery that track traffic thread-changing is transferred.

Brief description of the drawings

Fig. 1 is the method flow schematic diagram of the embodiment of the present invention；

Fig. 2 is the system structure diagram of the embodiment of the present invention.

Embodiment

To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing and specific implementation The present invention is described in further detail for example.

The present invention core concept be：When SGW detects linked PGW exceptions, trigger the PGW Upper UE static ip address is bound with local PGW (i.e. visited place), and then local PGW is initiated again Routing update so that UE static ip address is only bound with the local PGW, and is only displayed in visited place In PGW.

Fig. 1 is the method flow schematic diagram of the embodiment of the present invention, as shown in figure 1, the fault recovery method is implemented Example mainly includes：

It is public that gateway SGW in step 101, track traffic region detection in real time and this SGW are linked Whether Data Network Gateway PGW is abnormal.

This step is used to detect whether each PGW linked with SGW in track traffic region is normal in real time, if there is It is abnormal, then illustrate that PGW can not provide service to be moved to the UE of one's respective area, now need execution step 102 timely UE thereon is bound with local PGW, to recover UE proper communication.

In actual applications, carry out the detection when, it may be considered that utilize S5 interface procedures, come in time know with Whether each PGW of SGW links is abnormal, specifically, can be realized using following methods：

The SGW initiates Echo processes to the PGW, is used when being carried in the response message that the SGW is received When the identification information of interface exception is indicated, or when not receiving corresponding response message, judge that the PGW is different Often.

Explanation is needed exist for, is one kind of S5 interface procedures according to Echo processes, according to existing Echo mistakes Journey, if PGW is abnormal, initiator SGW can not receive corresponding response message, or, abnormal PGW Response message carrier state abnormal causation value can be utilized, mark sgi interfaces are abnormal, and so, SGW can be based on This knows that PGW is abnormal.

When the SGW initiates S5 interface procedures to the PGW, if the SGW receives PGW again The identification information of startup, then judge that the PGW is abnormal.

Need exist in explanation, existing system, SGW can initiate S5 interface procedures to the PGW linked, If PGW is restarted, it will cause UE attached thereto to interrupt, if in this case, SGW is to institute The PGW of link initiates S5 interface procedures, then PGW can indicate that it is restarted using Recovery fields, this Sample SGW just understands that PGW can influence to adhere to the communication of UE thereon extremely.

Above-mentioned S5 interface procedures are grasped by those skilled in the art, will not be repeated here compared with system.

Step 102, when detecting abnormal PGW, the SGW triggers corresponding mobility management entity MME The static ip address of user equipment (UE) is bound with local PGW, wherein, the UE is that the SGW covers The UE on the abnormal PGW, the MME that it is currently the UE services that the MME, which is, are attached in cover area.

This step, for SGW after the PGW of abnormal state is detected, triggering core net will be adhered in one's respective area UE thereon is mapped on local PGW, to solve the problem of extremely caused UE communications of PGW are interrupted, So as to realize the fault recovery under track traffic thread-changing handoff case.

It is preferred that the static ip address of the UE can be entered with local PGW using following step triggering MME Row binding：

Step 1021, the SGW notify PGW described in the MME abnormal.

Specifically, the SGW can be abnormal by PGW described in MME described in S11 interface notifications.

Step 1022, the MME are notified according to described, are triggered the UE and are initiated attachment removal and the mistake adhered to again Journey.

Here, the UE will first handle detachment process under service MME triggering, then initiate again attached again Process, so as to which the static ip address in MME sides UE subscription data is mapped into the local PGW.

Step 1023, the MME carried out in the UE described in again in attaching process, by the label of the UE Static ip address about in data is mapped to the local PGW, and triggers the local PGW for the UE Initiate routing update process.

In this step, MME maps the static ip address in its subscription data in UE completes to adhere to again To the local PGW, so, transmission can be provided for UE by local PGW and serviced, so as to solve For communication disruption problem caused by the PGW failures of the UE core nets serviced.

Here, it is UE initiation routing update processes by triggering the local PGW, UE can be caused IP address only in local PGW occur, to avoid the situation that same address occurs in two PGW.

Fig. 2 is a kind of structural representation of the fault recovery system corresponding with the above method, as shown in Fig. 2 The fault recovery system includes：Gateway SGW, public data network gateway PGW, mobility management entity MME and user equipment (UE)；Wherein,

The SGW, in track traffic region, for detecting whether the PGW linked with this SGW is different in real time Often；

The MME, for when the SGW detects abnormal PGW, being triggered by the SGW by the SGW The static ip address for the UE being attached in management region on the abnormal PGW is bound with local PGW, institute State MME to be the MME for being currently the UE services.

It is preferred that the SGW, for initiating Echo processes to the PGW under other described SGW, when what is received When the identification information for indicating interface exception is carried in response message, or when not receiving corresponding response message, Judge that the PGW is abnormal；S5 interface procedures are initiated to the PGW under other described SGW, if the SGW The identification information of PGW restartings is received, then judges that the PGW is abnormal.

It is preferred that the SGW is used to notify PGW described in the MME abnormal；

The MME, for being notified according to described, triggers the UE and initiates attachment removal and the process adhered to again； The UE carry out described in again in attaching process, the static ip address in the subscription data of the UE is mapped to institute Local PGW is stated, and triggers the local PGW and initiates routing update process for the UE.

In summary, presently preferred embodiments of the present invention is these are only, the protection of the present invention is not intended to limit Scope.Within the spirit and principles of the invention, any modification, equivalent substitution and improvements made etc., It should be included within protection scope of the present invention.

Claims (6)

1. a kind of fault recovery method, it is characterised in that including：

Gateway SGW in track traffic region detects the public data network gateway linked with this SGW in real time Whether PGW is abnormal；

When detecting abnormal PGW, the SGW triggers corresponding mobility management entity MME by user equipment UE static ip address is bound with local PGW, wherein, the UE is that the SGW overlay areas are included The UE on the abnormal PGW, the MME that it is currently the UE services that the MME, which is,.

2. according to the method described in claim 1, it is characterised in that described to detect the public number linked with this SGW Whether include extremely according to net gateway PGW：

The SGW initiates Echo processes to the PGW, is used when being carried in the response message that the SGW is received When the identification information of interface exception is indicated, or when not receiving corresponding response message, judge that the PGW is different Often；

When the SGW initiates S5 interface procedures to PGW, if the SGW receives PGW restartings Identification information, then judge that the PGW is abnormal.

3. according to the method described in claim 1, it is characterised in that described to trigger corresponding MME by the quiet of UE State IP address carries out binding with local PGW to be included：

The SGW notifies PGW described in the MME abnormal；

The MME is notified according to described, is triggered the UE and is initiated attachment removal and the process adhered to again；

The MME carried out in the UE described in again in attaching process, by the static state in the subscription data of the UE IP address is mapped to the local PGW, and it is UE initiation routing update processes to trigger the local PGW.

4. a kind of fault recovery system, it is characterised in that including：Gateway SGW, public data network gateway PGW, Mobility management entity MME and user equipment (UE)；Wherein,

The SGW, in track traffic region, for detecting whether the PGW linked with this SGW is different in real time Often；

The MME, for when the SGW detects abnormal PGW, will be attached to by SGW triggerings The static ip address of UE on the abnormal PGW is bound with local PGW, wherein, the UE is described The UE being moved in the SGW overlay areas of MME services.

5. system according to claim 4, it is characterised in that the SGW, for being sent out to the PGW Echo processes are played, when carrying the identification information for indicating interface exception in the response message received, or are not received During to corresponding response message, judge that the PGW is abnormal；When initiating S5 interface procedures to the PGW, such as Really described SGW receives the identification information of PGW restartings, then judges that the PGW is abnormal.

6. system according to claim 4, it is characterised in that the SGW, for notifying the MME The PGW is abnormal；

The MME, for being notified according to described, triggers the UE and initiates attachment removal and the process adhered to again； The UE carry out described in again in attaching process, the static ip address in the subscription data of the UE is mapped to institute Local PGW is stated, and triggers the local PGW and initiates routing update process for the UE.