CN101453744B - Service control method and apparatus - Google Patents
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- CN101453744B CN101453744B CN2007101959523A CN200710195952A CN101453744B CN 101453744 B CN101453744 B CN 101453744B CN 2007101959523 A CN2007101959523 A CN 2007101959523A CN 200710195952 A CN200710195952 A CN 200710195952A CN 101453744 B CN101453744 B CN 101453744B
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Abstract
The invention discloses a service control method, which comprises the following steps: assigning as least two different tunnel identifiers to a PDP context; establishing a main GTP tunnel and at least one spare GTP tunnel between a source GTP network element and a target GTP network element by using the tunnel identifiers; and when the main GTP tunnel fails, switching a GTP service from the main GTP tunnel to the spare GTP tunnel. Corresponding to the method, the invention also provides the GTP network elements. The method and the GTP network elements realize simple, low-cost and rapid GTP tunnel switching and ensure the continuity and reliability of the GTP service.
Description
Technical field
(General Packet Radio Service, GPRS) technical field relate in particular to GPRS Tunnel Protocol (GPRS Tunneling Protocol, GTP) service control method and device to the present invention relates to GPRS.
Background technology
GTP provides signaling and data transport service on Iu, the Gn of Gn, gp interface and the UMTS network of GPRS network and gp interface, below be referred to as the GTP business.Wherein, the GTP-C agreement of chain of command is present in Gn and gp interface, and the GTP-U agreement of user's face is present in Iu, Gn and gp interface.Referring to Fig. 1, be the GPRS networking diagram, wherein, Iu, Gn and gp interface terminal device are for the network equipment of operation GTP, hereinafter referred to as the GTP network element.GTP allows the various protocols grouping to transmit between UMTS/GPRS backbone network node by the mode in tunnel, the GTP-C agreement is used to create, revise or delete a user or the chain of command GTP tunnel that the multicast group is relevant, GTP-U agreement user creates, revises or deletion and a user or user's face GTP tunnel that the multicast group is relevant, they are transparent for the user of UMTS/GPRS network, this paper indication GTP comprises each version, comprises V0, V1 and V2.
Referring to Fig. 2, be two GTP net element communication schematic diagrames.The GTP tunnel protection mechanism is based on the Echo detection at present,, finds by sending the Echo probe messages whether GTP tunnel breaks down between GTP network element A and the GTP network element B that is; after determining the GTP tunnel fault; rebuild GTP tunnel, during rebuilding GTP tunnel, the GTP business is in interrupt status always.
In addition, the inventor finds that in practice process prior art only adopts the networking redundant fashion to improve the GPRS network application level reliability.So-called networking redundancy is meant when networking, adopts the identical equipment forming device level main and standby relation of two covers, when an equipment fault, take over its business by another equipment, thereby the protection business is not suffered a loss.With Fig. 2 is example; be when networking; for source GTP network element A is provided with a GTP network element that configuration is identical, thereby when GTP network element A fault, can guarantee the GTP business by using this backup GTP network element; yet; this networking redundant fashion only is the protection at source GTP network element, and is for GTP tunnel or purpose GTP network element failure, then powerless; that is to say that it is insurmountable to the integrity problem in the professional transmission course of GTP.In addition, self also there is the cost height in this networking redundancy scheme, can't guarantees professional successional problem before and after fault by Hot Spare between network element.
Summary of the invention
In view of this, the invention provides a kind of GTP service control method and device, to solve the low problem of GTP service reliability in the existing scheme.
For this reason, the embodiment of the invention adopts following technical scheme:
A kind of service control method is used to control packet wireless service tunnel protocol GTP business, comprising: for the packet data protocol PDP Context distributes at least two parts of different Tunnel Identifiers; Utilize described Tunnel Identifier, between source GTP network element and purpose GTP network element, set up main with GTP tunnel and at least one standby GTP tunnel; When described master uses the GTP tunnel fault, the GTP business is switched on the standby GTP tunnel with GTP tunnel from main.
A kind of GTP network element is characterized in that, comprising: the Tunnel Identifier allocation units are used to same PDP Context to distribute at least two parts of different Tunnel Identifiers; Active/standby tunnel is set up the unit, is used to utilize described Tunnel Identifier, sets up main with GTP tunnel and standby GTP tunnel between described GTP network element and purpose GTP network element; Switch control unit when described master uses the GTP tunnel fault, is used for the GTP business is transformed into standby GTP tunnel from main with GTP tunnel.
Thus, when the master uses the GTP tunnel fault, can business be sent to purpose GTP network element by standby GTP tunnel, purpose GTP network element receives data and submits to the GTP Business treatment from standby GTP tunnel, the operation layer perception is switched less than the tunnel and the generation of service disconnection, thereby can guarantee the continuity and the reliability of GTP business.And the embodiment of the invention does not need the GTP network element is backed up, and only by distributing many parts of Tunnel Identifiers can finish main foundation with GTP tunnel and standby GTP tunnel, realizes that simply cost is low.
Description of drawings
Fig. 1 is a prior art GPRS networking schematic diagram;
Fig. 2 is two GTP net element communications of prior art schematic diagram;
Fig. 3 is one or two GTP net element communication of embodiment of the invention schematic diagram;
Fig. 4 is the embodiment of the invention one active and standby GTP tunnel schematic diagram of using;
Fig. 5 is the embodiment of the invention one flow chart;
Fig. 6 is the embodiment of the invention one active and standby GTP tunnel end points and GTP path mapping schematic diagram;
Fig. 7 is that the embodiment of the invention one is active and standby with GTP tunnel visioning procedure figure;
Fig. 8 switches schematic diagram for the embodiment of the invention one is active and standby with GTP tunnel;
Fig. 9 is that the embodiment of the invention one is active and standby with GTP tunnel modification process figure;
Figure 10 removes flow chart for the embodiment of the invention one is active and standby with GTP tunnel;
Figure 11 is 2 two GTP net element communications of embodiment of the invention schematic diagram;
Figure 12 is the embodiment of the invention two active and standby GTP tunnel schematic diagrames of using;
Figure 13 is that the embodiment of the invention two is active and standby with GTP tunnel visioning procedure figure;
Figure 14 switches schematic diagram for the embodiment of the invention two is active and standby with GTP tunnel;
Figure 15 is that the embodiment of the invention two is active and standby with GTP tunnel modification process figure;
Figure 16 removes flow chart for the embodiment of the invention two is active and standby with GTP tunnel;
Figure 17 is 3 two GTP net element communications of embodiment of the invention schematic diagram.
Embodiment
The embodiment of the invention provides the scheme that strengthens the GTP tunnel reliability, improve continuity and the reliability of GTP business on network interface by increasing GTP backup tunnel, fail-over scheme and shortening path detection time, under bottom networking and the insecure situation of transmission state, also can guarantee the reliability service of application layer business.
Generally, embodiment of the invention method may further comprise the steps:
1, distributes at least two parts of different Tunnel Identifiers for the packet data protocol PDP Context;
2, utilize described Tunnel Identifier, between source GTP network element and purpose GTP network element, set up main with GTP tunnel and at least one standby GTP tunnel;
3, when described master uses the GTP tunnel fault, the GTP business is switched on the standby GTP tunnel with GTP tunnel from main.
Wherein, source GTP network element can be set up at least two GTP tunnels by same purpose GTP network element, also can set up at least two GTP tunnels with a plurality of purpose GTP network elements, below in conjunction with accompanying drawing, the embodiment of the invention is described in detail.
At first introduce the embodiment of the invention one.
Referring to Fig. 3, be that two GTP net element communications illustrate intention, wherein, network element 1 is a source GTP network element, network element 2 is a purpose GTP network element.By between network element 1 and network element 2, setting up continuity and the fail safe that two active and standby each other GTP tunnels improve the GTP business.
Referring to Fig. 4, be active and standby GTP tunnel schematic diagram, wherein, " GTP tunnel " is meant " GTP tunnel end points " and " GTP path " two parts between network element in the network element of both sides, wherein, the GTP tunnel end points is by " GTP tunnel Endpoint ID " (Tunnel Edge ID, TEID) expression, (Path ID PID) represents by " GTP ID of trace route path " in the GTP path.Wherein, network element provides the management function to the primary, spare tunnel of GTP, comprises establishment, modification and the dismounting in tunnel, and quick detection mechanism and professional the switching.
Referring to Fig. 5, be embodiment one flow chart, comprising:
Step 501: be two parts of different Tunnel Identifiers of each PDP Context configuration;
Wherein, these two parts of Tunnel Identifiers are used " master uses PID with TEID+ master " and " the standby PID of standby TEID+ " expression respectively.The primary and backup GTP tunnel end points of same PDP Context must use different TEID, and is mapped to respectively on the different GTP paths; In like manner, the different GTP path should have relatively independent Network Transmission path, when guaranteeing a certain paths fault, is unlikely to influence the business in other path.
It is separate that different PDP Contexts active and standby is identified at the branch timing with GTP tunnel, the master of different PDP Contexts can be used and back up the GTP tunnel end points and be mapped on the identical or different GTP path, referring to Fig. 6, network element should consider to make the GTP path load balancing of trying one's best when distributing the GTP tunnel endpoint resources.
Step 502: create active and standby GTP tunnel;
Referring to Fig. 7, be to be network element shown in Figure 31 and the active and standby GTP tunnel flow chart of network element 2 establishments.Wherein, network element 1 is primary and backup GTP tunnel sign for this side PDP Context distributes, the master of this PDP Context between network element identified with PID with TEID and master corresponding to the main of this PDP Context by both sides with GTP tunnel, and the standby GTP tunnel of this PDP Context between network element identified by the standby TEID and the standby PID of both sides corresponding to this PDP Context.Network element 1 is created message by PDP Context active and standby GTP tunnel sign is sent to network element 2 in step 502-1 then; Network element 2 also distributes primary and backup GTP tunnel sign for this side PDP Context, creates response message at step 502-2 by PDP Context then and sends to network element 1.
Step 503: detect the GTP tunnel connectedness, under the normal condition, execution in step 504, when the master uses the GTP tunnel fault, execution in step 505;
In order to guarantee that path failure is detected rapidly, and avoid influencing business continuance, preferential adopt detection sensitivity at 50ms with interior detection agreement, for example two-way forwarding detects (BFD), BFD is a kind of independent HELLO agreement of high speed, it detects based on the Hello fault-detection data bag of UDP layer by regular transmission and judges transmission tunnel and lower floor's fault, and can also detect and judge transport layer, tunnel layer, the error code that IP layer and application layer exist, soft faults such as packet loss, at present the default assay intervals of BFD is 10ms, detects fault 3 times and just reports tunnel failure continuously.This BFD surveys the more existing Echo of mechanism, and to survey machine-processed response speed fast, and it is long that existing Echo surveys the mechanism cycle, generally needed tens seconds could confirm fault to a few minutes.
Step 504: transmit the GTP business with GTP tunnel by main;
Step 505: the GTP business is switched on the standby GTP tunnel with GTP tunnel from main.
When detecting the GTP path failure, find all PDP Contexts on this GTP path, if this PDP Context will be led with GTP tunnel and be mapped on the failure path, then carry out handoff functionality, these PDP Context business of being about to switch on the standby GTP tunnel to be proceeded.
Referring to Fig. 8, switch schematic diagram with GTP tunnel for active and standby.
Thus, different PDP Contexts are sent to purpose GTP network element by standby GTP tunnel (standby GTP tunnel end points and standby GTP path) separately with business, purpose GTP network element receives data and submits to the GTP Business treatment from standby GTP tunnel, and the operation layer perception is less than the generation of tunnel switching and service disconnection.
In addition, can also carry out dynamic management, that is, GTP tunnel be made amendment or removed active and standby GTP tunnel.
If variation has taken place for TEID or PID, can change by the PDP context modification flow process.Referring to Fig. 9, be the embodiment of the invention one active and standby GTP tunnel modification process figure that uses.Network element 1 sends to network element 2 with the active and standby GTP tunnel sign after the renewal of this side PDP Context by PDP context modification message in step 901, network element 2 also sends to network element 1 with the active and standby GTP tunnel sign of the PDP Context after the renewal of this side by the PDP context modification response message in step 902.
Referring to Figure 10, remove flow chart with GTP tunnel for the embodiment of the invention one is active and standby.Network element 1 passes through network element 2 by PDP Context deletion message in step 1001, network element 2 discharges the active and standby GTP tunnel sign that this side is distributed for this PDP Context, in step 1002, return PDP Context deletion response message then to network element 1, after this, network element 1 discharges the active and standby GTP tunnel sign of PDP Context in this side again.
Introduce the embodiment of the invention two below.
To set up active and standby GTP tunnel different with GTP network element in source among the embodiment one and purpose GTP network element, embodiment two be on different purpose GTP network elements, set up main with GTP tunnel and standby GTP tunnel.
Referring to Figure 11, be embodiment two schematic diagrames, wherein, network element 1 is a source GTP network element, network element 2 and network element 3 are two purpose GTP network elements.When distributing the GTP tunnel sign, for network element 1, need identify and standby GTP tunnel sign with GTP tunnel for the PDP Context distribution is main, for network element 2 and network element 3, then distribute the master to identify respectively with GTP tunnel sign and standby GTP tunnel.Referring to Figure 12, be the active and standby tunnel schematic diagram of using of the embodiment of the invention two GTP.
Similar with embodiment one, it is separate that different PDP Contexts active and standby is identified at the branch timing with GTP tunnel, main the using with backup GTP tunnel end points of different PDP Contexts can be mapped on the different GTP paths, still see also Fig. 6, network element should consider to make the GTP path load balancing of trying one's best when distributing the GTP tunnel endpoint resources.
Referring to Figure 13, be the embodiment of the invention two active and standby GTP tunnel visioning procedure figure that use.Wherein, network element 1 is primary and backup GTP tunnel sign for this side PDP Context distributes, main the use GTP tunnel of this PDP Context between network element identified with PID with main with TEID corresponding to the main of this PDP Context by both sides, and the standby GTP tunnel of this PDP Context between network element is by standby TEID and the standby PID sign of both sides corresponding to this PDP Context.Network element 1 will be led with the GTP tunnel sign by PDP Context establishment message and send to network element 2 in step 1301 then; Network element 2 is that this side PDP Context distributes the main Tunnel Identifier of using, and creates response message in step 1302 by PDP Context then and sends to network element 1; Similarly, network element 1 is created message by PDP Context standby GTP tunnel sign is sent to network element 3 in step 1303; Network element 3 is that this side PDP Context distributes the over run tunnel sign, creates response message in step 1304 by PDP Context then and sends to network element 1.
If network element 2 and network element 3 have all successfully been replied response message to network element 1, then network element 1 has successfully been set up the active and standby GTP tunnel of this PDP Context.If the master sets up successfully with GTP tunnel, and standby GTP tunnel is set up failure, and then network element 1 is selected other network element, and for example network element 4, attempts setting up standby GTP tunnel once more.If main foundation with GTP tunnel failed, and standby GTP tunnel is set up successfully, then network element 1 selects other network elements to set up the main GTP tunnel of using.If there is not other purpose GTP network element to select, then source GTP network element and purpose GTP network element use and to have set up a successful GTP tunnel and transmit as unique GTP tunnel, and described active and standby GTP tunnel method does not re-use.
Referring to Figure 14, for the embodiment of the invention two active and standby GTP tunnels switch schematic diagram.When detecting the GTP path failure, send signalling trouble, find all PDP Contexts on this GTP path, be mapped on the failure path, then these PDP Context business are switched on the standby GTP tunnel and proceed if this PDP Context will be led with GTP tunnel.Need to prove, in embodiment two, only be by the professional handoff functionality of the execution of network element 1.After the switching, network element 2 notice upstream nodes are the new business route more, informs the current disabled status that is, network element 3 notice upstream nodes are the new business route more, informs the current initiate mode that is.
In addition, can also carry out dynamic management, that is, GTP tunnel be made amendment or removed active and standby GTP tunnel.
If variation has taken place for TEID or PID, can change by the PDP context modification flow process.Referring to Figure 15, be the embodiment of the invention two active and standby GTP tunnel modification process figure that use.Network element 1 sends to network element 2 with the GTP tunnel sign by PDP context modification message with the master after the renewal of this side PDP Context in step 1501, network element 2 sends to network element 1 with the GTP tunnel sign by the PDP context modification response message with the PDP Context master after the renewal of this side in step 1502; Similarly, network element 1 sends to network element 3 with the standby GTP tunnel sign after the renewal of this side PDP Context by PDP context modification message in step 1503, network element 3 sends to network element 1 with the standby GTP tunnel sign of the PDP Context after the renewal of this side by the PDP context modification response message in step 1504.
Referring to Figure 16, remove flow chart with GTP tunnel for the embodiment of the invention two is active and standby.Network element 1 passes through network element 2 by PDP Context deletion message in step 1601, network element 2 discharges this side and identifies with GTP tunnel for the master that this PDP Context distributes, in step 1602, return PDP Context deletion response message then to network element 1, after this, network element 1 discharges PDP Context again and identifies with GTP tunnel the master of this side; Similarly, in step 1603, pass through network element 3 if delete standby GTP tunnel network element 1 by PDP Context deletion message, network element 3 discharges the standby GTP tunnel sign that this side is distributed for this PDP Context, in step 1604, return PDP Context deletion response message then to network element 1, after this, network element 1 discharges the standby GTP tunnel sign of PDP Context in this side again.
With respect to embodiment one, the advantage of embodiment two is conspicuous, promptly, not only when the master uses the GTP tunnel fault, can switch to fast on the backup GTP tunnel, and, when purpose GTP network element failure, also can switch to fast on other the purpose GTP network element, thereby further guarantee the continuity and the reliability of GTP business.
Introduce the embodiment of the invention three at last.
Embodiment three is combinations of above-mentioned two embodiment, promptly sets up a plurality of GTP tunnels with each purpose GTP network element respectively by source GTP network element, thereby further guarantees the continuous and reliable of GTP business.
Referring to Figure 17, be embodiment three schematic diagrames.Wherein, network element 1 is a source GTP network element, it is main with purpose GTP network element and standby purpose GTP network element that network element 2 and network element 3 are respectively, and sets up main GTP tunnel and the standby GTP tunnel used between network element 1 and network element 2, also sets up main with GTP tunnel and standby GTP tunnel between network element 1 and network element 3.
When distributing the GTP tunnel sign, for network element 1, need be for first master between PDP Context distribution and the network element 2 identify with the GTP tunnel sign and the first standby GTP tunnel, second master between distribution and the network element 3 identifies with GTP tunnel and the second standby GTP tunnel sign simultaneously; For network element 2, then first master between distribution and the network element 1 identifies with the GTP tunnel sign and the first standby GTP tunnel, and in like manner, for network element 3, then second master between distribution and the network element 1 identifies with GTP tunnel and the second standby GTP tunnel sign.
Under the normal condition, source GTP network element by and main with the master between purpose GTP network element with GTP tunnel transmission GTP business, promptly transmit the GTP business with GTP tunnel by first master between network element 1 and the network element 2, when first master uses the GTP tunnel fault, business is switched on the first standby GTP tunnel, when the first main all faults of the GTP tunnel and the first standby GTP tunnel of using, perhaps, when the master uses purpose GTP network element (network element 2) fault, business is switched to second master with on the GTP tunnel, when second leads with GTP tunnel also fault, business is switched on the second standby GTP tunnel.
Thus, the backup of GTP tunnel has further improved the GTP service security between the backup of the GTP network element that the embodiment threeway is looked over so as to check, each purpose GTP network element and the source GTP network element.
The embodiment of the invention also provides a kind of GTP network element, i.e. source GTP network element, and as shown in Figure 4, this GTP network element comprises GTP Service Processing Module, GTP tunnel administration module and GTP path management module.Wherein, the GTP tunnel administration module further can comprise Tunnel Identifier allocation units and switch control unit, and the GTP path management module can comprise that further active/standby tunnel sets up unit and fault detection unit.The Tunnel Identifier allocation units are mainly used in and are at least two parts of different Tunnel Identifiers of same PDP Context distribution; Active/standby tunnel is set up the unit and is mainly used in the PDP Context establishment message that comprises described Tunnel Identifier to the transmission of purpose GTP network element, and receive PDP Context establishment response message, between described GTP network element and purpose GTP network element, set up main with GTP tunnel and standby GTP tunnel; Fault detection unit be mainly used in by and purpose GTP network element between detection messages, determine whether to break down; Mainly when described fault detection unit was determined to break down, control switched to the GTP business on the standby GTP tunnel with GTP tunnel from main switch control unit.
In addition, this GTP network element also provides the function to active and standby GTP tunnel dynamic management.For example, can on-the-fly modify active/standby tunnel, at this moment, described GTP tunnel administration module also comprises active/standby tunnel modification unit, and this master revises the unit with the tunnel and is used for revising described PDP Context when described Tunnel Identifier changes; Described active/standby tunnel is set up the unit and is sent described PDP context modification message to purpose GTP network element, and receives the PDP context modification response message.For another example, can dynamically delete active and standby GTP tunnel, at this moment, described GTP tunnel administration module also comprises active/standby tunnel dismounting unit, and this master removes the unit with the tunnel and is used to be released to the Tunnel Identifier that described PDP Context distributes; Described active/standby tunnel is set up the unit and is sent described PDP Context deletion message to purpose GTP network element, and receives PDP Context deletion response message.
Specific implementation for device embodiment can be referring to method embodiment, for example, main is to set up between same source GTP network element and same purpose GTP network element with GTP tunnel and standby GTP tunnel, and the flow process of at this moment, creating, revise and deleting GTP tunnel is respectively referring to Fig. 7, Fig. 9 and Figure 10; Perhaps, main is to set up respectively between same source GTP network element and various objectives GTP network element with GTP tunnel and standby GTP tunnel, and the flow process of at this moment, creating, revise and deleting GTP tunnel is respectively referring to Figure 13, Figure 15 and Figure 16; Perhaps, source GTP network element and a plurality of purpose GTP network element are set up a plurality of main with GTP tunnel and a plurality of standby GTP tunnel respectively, and at this moment, source GTP network element and purpose GTP network element structural representation are referring to Figure 17.Do not give unnecessary details one by one at this.
Need to prove that the main of embodiment of the invention indication all is dynamic and relative with GTP tunnel, standby GTP tunnel, master with purpose GTP network element and standby purpose GTP network element.When system's initial configuration, determined main and standby relation, after the master switches to over run tunnel with the tunnel, in fact over run tunnel originally becomes the new main tunnel of using, if further detect this new leading when using tunnel failure, need business to be switched on other normal tunnels, here, other normal tunnels comprise former main tunnel and other over run tunnels used after the fault recovery again.
In addition, above-mentioned several embodiment describe with two GTP tunnels or two purpose GTP network elements, in fact, for continuity and the reliability that further guarantees the GTP business, three or more GTP tunnels or purpose GTP network element can be set.
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 (14)
1. a service control method is used to control packet wireless service tunnel protocol GTP business, it is characterized in that, comprising:
For the packet data protocol PDP Context distributes at least two parts of different Tunnel Identifiers;
Utilize described Tunnel Identifier, between source GTP network element and purpose GTP network element, set up main with GTP tunnel and at least one standby GTP tunnel;
When described master uses the GTP tunnel fault, described GTP business is switched on the described standby GTP tunnel with GTP tunnel from described master;
Wherein,
Described Tunnel Identifier is determined jointly by GTP ID of trace route path between the GTP tunnel Endpoint ID of network element internal and network element;
The described main of same PDP Context uses different GTP tunnel Endpoint IDs with GTP tunnel with described standby GTP tunnel, and is mapped to different GTP paths respectively.
2. according to the described method of claim 1, it is characterized in that,
Described master sets up between same source GTP network element and same purpose GTP network element with GTP tunnel and described standby GTP tunnel;
Perhaps,
Described main foundation respectively between same source GTP network element and various objectives GTP network element with GTP tunnel and described standby GTP tunnel.
3. according to the described method of claim 2, it is characterized in that, described main be when between same source GTP network element and various objectives GTP network element, setting up respectively with GTP tunnel and described standby GTP tunnel, with described GTP business from described master switches to described standby GTP tunnel with GTP tunnel after, also comprise:
Described main purpose GTP network element notice upstream node with the GTP tunnel correspondence has been forbidden the GTP business;
The purpose GTP network element notice upstream node of described standby GTP tunnel correspondence has been enabled the GTP business.
4. according to the described method of claim 2, it is characterized in that, described main be when between same source GTP network element and various objectives GTP network element, setting up respectively with GTP tunnel and described standby GTP tunnel, also comprise:
Judge whether fault of described main purpose GTP network element with the GTP tunnel correspondence, if carry out described the GTP business is switched to step on the described standby GTP tunnel from described master with GTP tunnel.
5. according to the described method of claim 1, it is characterized in that,
Described purpose GTP network element is the first purpose GTP network element; The described main first main GTP tunnel and the first standby GTP tunnel of between described source GTP network element and the described first purpose GTP network element, setting up used that be meant with GTP tunnel and described standby GTP tunnel;
Described method also comprises:
Between the described source GTP network element and the second purpose GTP network element, set up the second main GTP tunnel and the second standby GTP tunnel used;
When described first main, perhaps, when the described first purpose GTP network element failure, described GTP business is switched to the described second main GTP tunnel of using with GTP tunnel and described first standby GTP tunnel fault all; When described second master uses the GTP tunnel fault, described GTP business is switched to the described second standby GTP tunnel.
6. according to claim 1,2,3,4 or 5 described methods, it is characterized in that, also comprise:
If described master with GTP tunnel sets up successfully, the foundation of described standby GTP tunnel fails, then described source GTP network element selects other purposes GTP network element to set up standby GTP tunnel;
If described master sets up with GTP tunnel and fails, described standby GTP tunnel is set up successfully, then described source GTP network element selects other purposes GTP network element to set up the main GTP tunnel of using.
7. according to claim 1,2,3,4 or 5 described methods, it is characterized in that, after distributing described Tunnel Identifier, set up described mainly, also comprise with before GTP tunnel and the standby GTP tunnel:
Create message and PDP Context establishment response message by PDP Context, between described source GTP network element and described purpose GTP network element, transmit described Tunnel Identifier.
8. according to the described method of claim 7, it is characterized in that, also comprise:
After described Tunnel Identifier changed, described source GTP network element was revised described PDP Context, and sent PDP context modification message to described purpose GTP network element;
After described purpose GTP network element receives described PDP context modification message, revise the PDP Context of described tunnel correspondence, and reply the PDP context modification response message to described source GTP network element.
9. described according to Claim 8 method is characterized in that, also comprises:
When described source GTP network element or described purpose GTP network element need be deleted PDP Context, send PDP Context deletion message to described purpose GTP network element or described source GTP network element;
Described purpose GTP network element or described source GTP network element are released to the Tunnel Identifier that described PDP Context distributes after receiving described PDP Context deletion message, and reply PDP Context deletion response message;
Described source GTP network element or described purpose GTP network element are released to the Tunnel Identifier that described PDP Context distributes after receiving described PDP Context deletion response message.
10. according to claim 1,2,3,4 or 5 described methods, it is characterized in that,
By between described source GTP network element and described purpose GTP network element, sending two-way detection messages, determine whether to break down; During fault, carry out described the GTP business is switched to step on the standby GTP tunnel from main with GTP tunnel.
11. a GTP network element is characterized in that, comprising:
The Tunnel Identifier allocation units are used to same PDP Context to distribute at least two parts of different Tunnel Identifiers;
Active/standby tunnel is set up the unit, is used to utilize described Tunnel Identifier, sets up main with GTP tunnel and standby GTP tunnel between described GTP network element and purpose GTP network element;
Switch control unit when described master is broken down with GTP tunnel, is used for the GTP business is transformed into described standby GTP tunnel from described master with GTP tunnel;
Wherein,
Described Tunnel Identifier is determined jointly by GTP ID of trace route path between the GTP tunnel Endpoint ID of network element internal and network element;
The described main of same PDP Context uses different GTP tunnel Endpoint IDs with GTP tunnel with described standby GTP tunnel, and is mapped to different GTP paths respectively.
12. according to the described GTP network element of claim 11, it is characterized in that,
Also comprise active/standby tunnel modification unit, be used for when described Tunnel Identifier changes, revising described PDP Context;
Described active/standby tunnel is set up the unit and is sent described PDP context modification message to purpose GTP network element, and receives the PDP context modification response message.
13. according to the described GTP network element of claim 11, it is characterized in that,
Also comprise active/standby tunnel dismounting unit, be used to be released to the Tunnel Identifier that described PDP Context distributes;
Described active/standby tunnel is set up the unit and is sent described PDP Context deletion message to purpose GTP network element, and receives PDP Context deletion response message.
14. according to claim 11,12 or 13 described GTP network elements, it is characterized in that,
Also comprise fault detection unit, this fault detection unit be used for by and described purpose GTP network element between detection messages, determine mainly whether to break down with GTP tunnel.
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