CN101291283B - PDN SAE GW selection method, system and device in SAE - Google Patents
PDN SAE GW selection method, system and device in SAE Download PDFInfo
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- CN101291283B CN101291283B CN200710103105XA CN200710103105A CN101291283B CN 101291283 B CN101291283 B CN 101291283B CN 200710103105X A CN200710103105X A CN 200710103105XA CN 200710103105 A CN200710103105 A CN 200710103105A CN 101291283 B CN101291283 B CN 101291283B
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Abstract
The invention discloses a method, a system and a device for selecting a PDN SAE GW in an SAE, which are to improve the probability for selecting the PDN SAE GW with normal state. The method comprises the following steps that: in the flow for establishing load bearing, a mobility management entity MME selects a service system architecture evolution gateway entity Serving SAE GW; and the Serving SAE GW selected by the MME selects a package data network system architecture evolution gateway entity PDN SAE GW. The system comprises the MME, the Serving SAE GW and the PDN SAE GW, wherein, the MME is used for selecting the Serving SAE GW in the flow for establishing the load bearing and the Serving SAE GW is used for selecting the PDN SAE GW.
Description
Technical field
The present invention relates to the communications field, particularly relate to the method, system and device of selecting PDN SAE GW among the SAE.
Background technology
The 3GPP tissue is in order to strengthen the competitiveness of future network, studying a kind of brand-new evolvement network, its system architecture is referring to shown in Figure 1, logic entity wherein comprises the UMTS Terrestrial radio access network (EUTRAN of evolution, Evolved UMTS Terrestrial Radio Access Network), be used to realize all and the wireless function associated of evolvement network; Mobility Management Entity (MME, Mobility ManagementEntity), be responsible for the mobile management of chain of command, comprise the management of user's context and mobile status, distributing user temporary identity sign etc., function class is like Serving GPRS Support Node SGSN (the Serving GPRS Support Node) chain of command of 3G WCDMA system; Service system architecture evolution gateway entity (ServingSAE GW, Serving System Architecture Evolution Gateway), be the user's face anchor point between the 3GPP connecting system, stop the interface of ETURAN, function class is like SGSN user's face of 3G WCDMA system; Packet data network System Architecture Evolution gateway entity (PDN SAE GW, Packet DataNetwork System Architecture Evolution Gateway) be the user's face anchor point between 3GPP connecting system and the non-3GPP connecting system, stop and external packet data network (PDN, Packet DataNetwork) interface etc., function class is like the Gateway GPRS Support Node GGSN (Gateway GPRS Support Node) of 3G WCDMA system.Compare with 3G WCDMA system as can be seen, a great variation is that chain of command separates with user's face in the SAE framework, and originally the SGSN network element is divided into MME and two entities of Serving SAE Gateway.
Illustrate: be the up-to-date system architecture schematic diagram of SAE that 3GPP tissue is worked out among Fig. 1, because the SAE standard is still in the formulation process, last system architecture also has variation, and under the prerequisite that does not influence inventive concept, the present invention does not limit.Only marked the network element of being correlated with among the present invention among Fig. 1, other and the present invention network element entity that it doesn't matter does not mark.
Based on the SAE framework, UE will be connected to a PDN, then needs to set up carrying, sets up between Serving SAE Gateway and PDN SAE Gateway in the carrying of core net one side.Set up the method for selecting PDN SAE Gateway in the process of carrying, determine to continue to use the method for 3GPP WCDMA system at present, promptly analyze APN (Access Point Name by MME, APN is a name that characterizes the PDN that is connected, carried to MME by mobile phone, perhaps MME obtains from the subscription data of UE) to obtain the chain of command IP address list of alternative PDN SAE Gateway; MME selects a PDN SAE Gateway from this tabulation afterwards.Because in the SAE framework, chain of command separates with user's face, therefore MME also will be responsible for selecting a Serving SAE Gateway simultaneously, MME sends carrying to the Serving SAE Gateway that selects and sets up request message then, carried the chain of command IP address of the selected PDN SAE of MME Gateway in this message, the PDN SAE Gateway that is selected by this Serving SAE Gateway and MME sets up carrying.
Allow in the SAE framework function of Serving SAE Gateway and PDN SAE Gateway is implemented in the physical equipment, the equipment of this class unification hereinafter is called SAE GW.ServingSAE Gateway is called for short Serving SAE GW hereinafter simultaneously, and PDN SAE Gateway is called for short PDN SAE GW,
MME need consider following principle when selecting Serving SAE GW and PDN SAE GW:
Principle is a): Serving SAE GW selects on the current visit of user ground usually, so that user's user face data has a convergent point in visit ground core net.
Principle b): the chain of command IP address list of PDN SAE GW determines that according to setting up the APN that uses when carrying promptly the PDN SAE GW that selects has been configured the PDN that can be connected to the APN correspondence from this tabulation.
Principle c): consider from forward efficiency, satisfying mentioned above principle a), under prerequisite b), the Serving SAE GW of selection and PDN SAE GW are physically unified.
The inventor finds in the invention process among the SAE that with one of last generation UMTS system variation on framework be to have realized that chain of command separates with user's face, originally the chain of command function of SGSN is inherited by MME, user plane functions is inherited by Serving SAE GW, if still continue to use the method in the UMTS system, select PDN SAE GW by MME, have following shortcoming:
1, chain of command is with after user's face separates among the SAE, in the process of setting up carrying, GW is two different physical equipments with PDN SAE GW if MME selects Serving SAE, owing to do not have Signalling exchange between MME and the selected PDN SAE GW, therefore whether MME can not to detect a selected PDN SAE GW current state normal, if MME has selected the abnormal PDN SAE of a state GW to be notified to Serving SAE GW (even having the normal PDN SAE of other states GW this moment) just, Serving SAE GW still can attempt to set up carrying with this PDN SAE GW, and can not continue to attempt to set up carrying with other PDN SAEGW setting up under the situation of carrying failure with this PDN SAE GW, so whole carrying is set up flow process and can be failed.
2, MME a) is met the IP address list of the Serving SAE GW of condition according to mentioned above principle, and from this tabulation selected Serving SAE GW; B on principle) is met the chain of command IP address list of the PDN SAE GW of condition; MME is difficult to carry out principle c afterwards) judgement, promptly from the chain of command IP address list of PDN SAE GW, select a PDN SAE GW who physically unifies with selected Serving SAEGW, because framework should not stipulate that the chain of command IP address of Serving SAE GW and PDN SAE GW logic entity is necessary identical in the physical equipment of a Serving SAEGW and PDN SAE GW unification yet as far as possible.
Summary of the invention
The embodiment of the invention provides the method, system and device of selecting PDN SAE GW among the SAE, to improve the probability of the normal PDN SAE of selection mode GW.
The method of the embodiment of the invention comprises: set up in the flow process of carrying, Mobility Management Entity MME selects service system architecture evolution gateway entity Serving SAE GW, and the customizing messages that will be used for described Serving SAEGW selection PDN SAE GW is sent to Serving SAE GW, wherein, described customizing messages comprises the chain of command IP address list of APN parameter and/or alternative PDN SAE GW; Priority between the PDN SAE GW that comprises in the chain of command IP address list of perhaps alternative PDN SAE GW and this tabulation;
The Serving SAE GW that this MME selectes is according to described specific information selecting PDN SAE GW.
The system of the embodiment of the invention comprises: MME, Serving SAE GW and PDN SAE GW; Wherein, MME, be used in the flow process of setting up carrying, select Serving SAE GW, and the customizing messages that will be used for Serving SAE GW selection PDN SAE GW is sent to Serving SAE GW, wherein, this customizing messages comprises the chain of command IP address list of APN parameter and/or alternative PDN SAE GW; Priority between the PDN SAE GW that comprises in the chain of command IP address list of perhaps alternative PDN SAE GW and this tabulation; Serving SAE GW is used for according to described specific information selecting PDN SAE GW.
The Mobility Management Entity of the embodiment of the invention comprises: selected cell is used to select Serving SAEGW; Transmitting element, be used for parameter with APN, or with the chain of command IP address list of alternative PDN SAE GW, or the chain of command IP address of alternative PDN SAE GW and APN parameter are carried on and set up in the bearing request message, and send to the selected Serving SAE GW of selected cell, make this Serving SAE GW according to setting up the Information Selection PDN SAE GW that carries in the bearing request message.
The service system architecture evolution gateway entity of the embodiment of the invention comprises: receiving element is used for the bearing request message of setting up that the receiving mobility management entity sends; Extraction unit is used for extracting the APN parameter from the bearing request message of setting up that receiving element is received, or the chain of command IP address list of alternative PDN SAE GW, or the chain of command IP address of alternative PDN SAE GW and APN parameter; Selected cell is used for the satisfactory PDN SAE of the Information Selection GW that extracts according to extraction unit.
Owing between Serving SAE GW and the PDN SAE GW Signalling exchange is arranged, Serving SAE GW knows the immediate status of each alternative PDN SAE GW, therefore Serving SAE GW can select the normal PDN SAE of current state GW, thereby improves the probability of the normal PDN SAE of selection mode GW.
Description of drawings
Fig. 1 is the system architecture diagram of existing evolvement network;
Fig. 2 is the method step flow chart of the embodiment of the invention;
Fig. 3 is the Mobility Management Entity structural representation in the embodiment of the invention;
Fig. 4 is the service system architecture evolution gateway entity structure schematic diagram in the embodiment of the invention;
Fig. 5 is the flow chart of the embodiment of the invention 1;
Fig. 6 is the flow chart of the embodiment of the invention 2;
Fig. 7 is the flow chart of the embodiment of the invention 3;
Fig. 8 is the flow chart of the embodiment of the invention 4;
Fig. 9 is the flow chart of the embodiment of the invention 5.
Embodiment
In order to improve the probability of the normal PDN SAE of selection mode GW.The embodiment of the invention provides the method for selecting PDN SAE GW among a kind of SAE, referring to shown in Figure 2, comprises following key step:
101, set up in the flow process of carrying, MME selects Serving SAE GW.
This step comprises following four kinds of situations:
Situation one, further in order to make MME behind selected Serving SAE GW, can be preferably and the PDN SAE GW that physically unifies of this Serving SAE GW.When described MME selectes Serving SAEGW, notify this Serving SAE GW with the APN parameter.
During the selected Serving SAE GW of situation two, described MME, chain of command IP address list (the chain of command IP address that comprises at least two alternative PDN SAE GW in this tabulation with alternative PDN SAE GW, the chain of command IP address list of alternative PDN SAE GW described in the present invention all comprises the chain of command IP address of at least two alternative PDN SAE GW, repeat no more) notify this Serving SAE GW, there is not priority between the alternative PDN SAE of each in this tabulation GW.
During the selected Serving SAE GW of situation three, described MME, notify this Serving SAE GW with the priority between each PDN SAE GW that comprises in the chain of command IP address list of alternative PDN SAE GW and this tabulation.
During the selected Serving SAE GW of situation four, described MME, notify this Serving SAE GW with chain of command IP address and the APN parameter of alternative PDN SAE GW.
102, the selected Serving SAE GW of MME selects PDN SAE GW.
Situation one in the corresponding step 101, the selected Serving SAE GW of MME select satisfactory PDN SAE GW according to the APN parameter of MME notice.
If this Serving SAE GW possesses the function of PDN SAE GW simultaneously, then whether the PDN SAE GW of this Serving SAEGW analysis itself has disposed the ability of handling this APN, if, the then preferential PDN SAE GW that selects own conduct carrying to set up.
If this Serving SAE GW does not possess the function of PDN SAE GW, though perhaps possess the function of PDN SAE GW simultaneously but the ability of this APN of configuration process not, perhaps owing to reasons such as load sharing should not be selected own to PDN SAE GW, then Serving SAE GW further analyzes APN (for example using methods such as dns resolution), selects outside other suitable PDN SAE GW to set up carrying.
The selected Serving SAE GW of situation two in the corresponding step 101, MME is according to strategy, selects satisfactory PDNSAE GW from the chain of command IP address list of the alternative PDN SAE GW of MME notice.
The satisfactory PDN SAE of the priority selective sequential from high to low GW that situation three in the corresponding step 101, the selected Serving SAE GW of MME notify according to MME.
The alternative PDN SAE GW that situation four in the corresponding step 101, the selected preferred MME of Serving SAE GW of MME notify; When setting up the carrying failure as the not selected alternative PDN SAE GW of this Serving SAE GW or with this alternative PDN SAE GW, this Serving SAE GW selects satisfactory PDN SAE GW according to the APN parameter of MME notice.Further, as the not selected described alternative PDN SAE GW of described Serving SAE GW, and this Serving SAE GW and PDN SAE GW close when establishing, perhaps described Serving SAE GW and this alternative PDN SAE GW set up the carrying failure, and this Serving SAE GW and PDN SAE GW close when establishing, and this Serving SAE GW preferably closes the PDN SAE GW that establishes with it.Further, described Serving SAE GW selectes when closing the PDNSAE GW that establishes with it, Serving SAE GW analyzes the chain of command IP address list that described APN obtains the PDN SAE GW of this Serving SAE GW outside, and selects satisfactory PDN SAE GW according to strategy from this tabulation.The selected situation of closing the PDN SAE GW that establishes with it of described Serving SAE GW comprises one of following at least: since this PDN SAE GW ability of the described APN of configuration process not, selected this PDN SAE GW of ServingSAE GW; Owing to the load sharing reason, not selected this PDN SAE GW of Serving SAE GW.
The embodiment of the invention also provides the system of selecting PDN SAE GW among a kind of SAE, and it comprises: MME, Serving SAE GW and PDN SAE GW.
MME is used in the flow process of setting up carrying, selects Serving SAE GW;
Serving SAE GW is used to select PDN SAE GW.
Wherein, described MME notifies selected Serving SAE GW with the APN parameter; Serving SAEGW selects PDN SAE GW according to the APN parameter of MME notice; Further Serving SAE GW determines that its and PDN SAE GW close and establishes, then preferential this PDN SAE GW.Perhaps,
Described MME notifies selected Serving SAE GW with the chain of command IP address list of alternative PDN SAE GW; Serving SAE GW selects satisfactory PDNSAE GW from the tabulation of MME notice.Perhaps,
Described MME notifies selected Serving SAE GW with chain of command IP address and the APN parameter of alternative PDN SAE GW; The described alternative PDNSAE GW of the preferred MME notice of Serving SAE GW; When setting up the carrying failure as the not selected described alternative PDN SAE GW of Serving SAE GW or with this alternative PDNSAE GW, this Serving SAE GW selects satisfactory PDN SAE GW according to the APN parameter of MME notice.
The embodiment of the invention also provides a kind of Mobility Management Entity, and referring to shown in Figure 3, it comprises: selected cell and transmitting element.
Selected cell is used to select Serving SAE GW;
Transmitting element, be used for parameter with APN, or with the chain of command IP address list of alternative PDN SAE GW, or the chain of command IP address of alternative PDN SAE GW and APN parameter be carried on and set up in the bearing request message, and send to the selected Serving SAE GW of selected cell.
The embodiment of the invention also provides a kind of service system architecture evolution gateway entity, and referring to shown in Figure 4, it comprises: receiving element, extraction unit and selected cell.
Receiving element is used for receiving and sets up bearing request message;
Extraction unit is used for extracting the APN parameter from the bearing request message of setting up that receiving element is received, or the chain of command IP address list of alternative PDN SAE GW, or the chain of command IP address of alternative PDN SAE GW and APN parameter;
Selected cell is used for the satisfactory PDN SAE of the Information Selection GW that extracts according to extraction unit.
If the information that extraction unit extracts is the APN parameter, then selected cell is selected satisfactory PDN SAE GW according to the APN parameter that extraction unit extracts.
If the information that extraction unit extracts is the chain of command IP address list of alternative PDN SAE GW, then selected cell is selected satisfactory PDN SAE GW from the chain of command IP address list of the alternative PDN SAE GW of extraction unit extraction.
If the information that extraction unit extracts is chain of command IP address and the APN parameter of alternative PDN SAE GW, then selected cell is selected satisfactory PDN SAE GW earlier from the described alternative PDN SAE GW that extraction unit extracts; When setting up the carrying failure as not selected described alternative PDN SAE GW or with this alternative PDN SAE GW, the described APN parameter of extracting according to extraction unit is selected satisfactory PDNSAE GW again.
Below specifically describe by 8 embodiment.
Embodiment 1: in the present embodiment, SAE GW A is the equipment of a Serving SAE GW and PDN SAEGW unification, MME selects SAE GW A as the Serving SAE GW that sets up carrying, the PDN SAE GW entity of SAE GWA itself also can be supported the APN that this carrying is used, so SAEGW A selects own to the PDN SAE GW that sets up carrying.Referring to shown in Figure 5, comprise the following steps:
201. set up in the carrying flow process, MME selects SAE GWA as the Serving SAEGW that sets up carrying, sets up bearing request message to its transmission, only carries APN in this message.
202.SAE GW A receives that MME sends set up bearing request message after, find only to carry in this message APN, then further judge and self possess the function of PDN SAE GW simultaneously, the PDN SAE GW of self can handle this APN simultaneously, therefore directly choose the PDN SAE GW of self to set up carrying, set up the carrying response message to the MME response.
Embodiment 2: in the present embodiment, SAE GW A is the equipment of a Serving SAE GW and PDN SAEGW unification, SAE GW B also is the equipment of a Serving SAE GW and PDN SAE GW unification, MME has selected SAE GW A as the Serving SAE GW that sets up carrying, but the PDN SAE GW entity of SAEGW A itself can not be supported the APN that this carrying is used, therefore SAE GWA is according to analyzing the chain of command IP address list that APN obtains available PDN SAE GW, and therefrom selects SAE GW B as the PDN SAE GW that sets up carrying according to strategy.Referring to shown in Figure 6, comprise the following steps:
301. set up in the carrying flow process, MME selects SAE GW A as Serving SAE GW, sets up bearing request message to its transmission, carries APN in this message.
302.SAE GW A receives that MME sends set up bearing request message after, find only to carry in this message APN, though then further judge and self possess the function of PDN SAE GW simultaneously, but the PDN SAE GW of self can not handle this APN, so APN is carried out dns resolution, obtain optional PDN SAE GW chain of command IP address list, SAE GWA selects the normal SAE GW of current state B as PDN SAE GW from tabulation according to strategy, sets up bearing request message to its transmission.
303.SAE GW B sets up the carrying response message to SAE GWA response.
304.SAE GWA sets up the carrying response message to the MME response.
Embodiment 3: in the present embodiment, Serving SAE GW A is a single S erving SAEGW entity, and PDN SAE GW B is a single PDN SAE GW entity.MME selects Serving SAE GWA as the Serving SAE GW that sets up carrying, because Serving SAE GWA itself does not support the function of PDN SAE GW, therefore Serving SAE GW A analyzes APN and obtains available PDN SAE GW chain of command IP address list, and therefrom selects PDN SAE GW B to set up carrying.Referring to shown in Figure 7, comprise the following steps:
401. set up in the carrying flow process, MME selects Serving SAE GW A as Serving SAEGW, sets up bearing request message to its transmission, carries APN in this message.
402.Serving SAE GW A receives that MME sends set up bearing request message after, find only to carry in this message APN, then further judge and self do not support the function of PDN SAE GW, so APN is carried out dns resolution, obtain optional PDN SAE GW chain of command IP address list, Serving SAE GW A selects the normal PDN SAE of current state GW B as PDN SAE GW from tabulation according to strategy, sets up bearing request message to its transmission.
403.PDN SAE GW B sets up the carrying response message to Serving SAE GWA response.
404.Serving SAE GWA sets up the carrying response message to the MME response.
Embodiment 4: in the present embodiment, Serving SAE GW A is a single S erving SAE GW entity, PDN SAE GW B is a single PDN SAE GW entity, PDN SAE GW C is a single PDN SAE GW entity, MME has selected Serving SAE GW A as the Serving SAE GW that sets up carrying, because Serving SAE GW A itself does not support the function of PDN SAE GW, therefore Serving SAE GW A analyzes APN and obtains available PDN SAE GW chain of command IP address list, and therefrom select PDN SAE GW B to set up carrying, and PDN SAE GW B state this moment is undesired, the carrying response message is not set up in response, so Serving SAE GW A selects PDN SAE GW C to set up carrying from tabulation, and be that fault is no longer selected up to detecting recovering state normal next time with PDN SAE GW B status indication.Referring to shown in Figure 8, comprise the following steps:
501. set up in the carrying flow process, MME selects Serving SAE GW A as Serving SAEGW, sets up bearing request message to its transmission, carries APN in this message.
502.Serving SAE GW A receives that MME sends set up bearing request message after, find only to carry in this message APN, then further judge and self do not support the function of PDN SAE GW, so APN is carried out dns resolution, obtain optional PDN SAE GW chain of command IP address list, Serving SAE GW A selects the state of current record according to strategy from tabulation be that normal PDN SAEGW B is as PDN SAE GW, set up bearing request message to its transmission, but, can not respond and set up the carrying response message because PDN SAEGW B this moment, state became undesiredly suddenly.
503.Serving SAE GWA retransmit to PDN SAE GW B set up bearer messages several times and still fail to receive response message after, select in PDN SAE GW that Serving SAE GWA obtains in step 502 tabulation next current record state be normal PDN SAE GW C as PDN SAE GW, set up bearing request message to its transmission; It is undesired that Serving SAE GW A writes down PDN SAE GW B state simultaneously, and no longer select up to detecting its recovering state normal next time when setting up carrying.
504.PDN SAE GW C sets up the carrying response message to Serving SAE GWA response.
505.Serving SAE GWA sets up the carrying response message to the MME response.
Embodiment 5: in the present embodiment, SAE GW A is the equipment of a Serving SAE GW and PDN SAEGW unification, MME knows that according to configuration SAE GW A possesses the function of Serving SAE GW and PDN SAE GW simultaneously, and MME wishes preferentially to select SAE GW A as the PDN SAE GW that sets up carrying according to strategy, so MME selects SAE GWA as the ServingSAE GW that sets up carrying, because the PDN SAE GW entity of SAE GW A itself also can be supported the APN that this carrying is used, therefore SAE GW A natural selection oneself has been satisfied the requirement of MME as the PDN SAE GW that sets up carrying.Referring to shown in Figure 9, comprise the following steps:
601. set up in the carrying flow process, know that according to configuration SAE GW A possesses the function of Serving SAE GW and PDN SAE GW simultaneously, and MME wishes preferentially to select SAE GW A as the PDN SAE GW that sets up carrying according to strategy, so MME has selected SAE GW A as the Serving SAE GW that sets up carrying, set up bearing request message to its transmission, carry APN in the message
602.SAE GW A receives that MME sends set up bearing request message after, judge that self possesses the function of PDN SAE GW simultaneously, the PDN SAE GW of self can handle this APN simultaneously, therefore directly chooses the PDN SAE GW of self to set up carrying, sets up the carrying response message to the MME response.
Embodiment 6:MME sends to the Serving SAE GW that selects and sets up in the bearing request message, it or not the chain of command IP address of only carrying the PDN SAE GW of a selection, but the tabulation that the chain of command IP address of carrying a plurality of optional PDN SAE GW is formed, the chain of command IP address of PDN SAE GW in this tabulation does not have order of priority, according to strategy of oneself and the state of current each PDN SAE GW, from this tabulation, select available PDN SAE GW to set up carrying by Serving SAE GW.
Embodiment 7:MME sends to the Serving SAE GW that selects and sets up in the bearing request message, it or not the chain of command IP address of only carrying the PDN SAE GW of a selection, but the tabulation that the chain of command IP address of carrying a plurality of optional PDN SAE GW is formed, there is order of priority the chain of command IP address of the PDN SAE GW in this tabulation.For example: the chain of command IP address setting of MME selected PDN SAE GW from this tabulation is a high priority, and the chain of command IP address setting of other alternative PDN SAE GW is a low priority in will tabulating, and promptly has two ranks.Serving SAE GW should at first use the high PDN SAE GW of priority to set up carrying, have only when this PDN SAE GW does not have response or response foundation carrying failure,, from described tabulation, select satisfactory PDN SAE GW among the PDN SAE GW of low priority according to strategy of oneself and the state of current each PDN SAE GW.(annotate: Serving SAE GW can judge earlier also whether the high PDN SAE GW current state of priority is normal, if it is not undesired,, from described tabulation, select satisfactory PDN SAE GW among the PDN SAE GW of low priority according to strategy of oneself and the state of current each PDN SAE GW.)
Embodiment 8:MME sends to the Serving SAE GW that selects and sets up in the bearing request message, carry the chain of command IP address of a preferential PDN SAE GW who selects, also carried simultaneously APN, ServingSAE GW should at first use described preferred PDN SAE GW to set up carrying, have only when this PDN SAEGW does not have response or response foundation carrying failure, Serving SAE GW just resolves the chain of command IP address list that obtains PDN SAE GW to APN; Again according to strategy of oneself and the state of current each PDN SAE GW, from this tabulation, select satisfactory PDN SAE GW to set up carrying afterwards.(annotate: Serving SAE GW can judge earlier also whether preferred PDN SAE GW current state is normal, if not undesired, just APN is resolved the chain of command IP address list that obtains PDN SAE GW; Again according to strategy of oneself and the state of current each PDN SAE GW, from this tabulation, select satisfactory PDN SAE GW to set up carrying afterwards.)
In sum, owing between Serving SAE GW and the PDN SAE GW Signalling exchange is arranged, Serving SAE GW knows the immediate status of each alternative PDN SAE GW, therefore Serving SAEGW can select the normal PDN SAE of current state GW, thereby improves the probability of the normal PDNSAE GW of selection mode.
Further, at embodiment 1 to 5, and in 8, because Serving SAE GW knows whether self possesses the function of PDN SAE GW simultaneously, and can the PDN SAE GW of self handle the corresponding APN of carrying, and Serving SAE GW also knows its other resources load condition, therefore is easy to judge oneself whether can bear the role of PDN SAE GW simultaneously.
If Serving SAE GW confirm to need selects outside other PDN SAE GW to set up carrying, Serving SAE GW obtains the tabulation of PDN SAE GW according to APN, owing between Serving SAE GW and the PDN SAE GW Signalling exchange is arranged, Serving SAE GW knows the immediate status of each PDN SAEGW in the tabulation, therefore Serving SAE GW can selective listing in the normal PDNSAE GW of current state set up carrying, improved success rate.
Further, in embodiment 5, although will select the power to make decision of PDN SAE GW to move on on the Serving SAE GW by MME, if support the function of ServingSAE GW and PDN SAE GW simultaneously but MME knows certain SAE GW, and MME wishes to select this SAE GW as the PDN SAE GW that sets up carrying, then MME can select this SAE GW as the ServingSAE GW that sets up carrying, utilize the preferential characteristic of selecting self to bear PDN SAE GW role of Serving SAE GW logic entity meeting in the in-one device, realize " right of suggestion " that MME selects PDN SAE GW.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (22)
1. select the method for packet data network System Architecture Evolution gateway entity PDN SAE GW among the SAE, it is characterized in that, comprise the following steps:
Set up in the flow process of carrying, Mobility Management Entity MME selects service system architecture evolution gateway entity Serving SAE GW, and the customizing messages that will be used for described Serving SAE GW selection PDN SAE GW is sent to Serving SAE GW, wherein, described customizing messages comprises the chain of command IP address list of APN APN parameter and/or alternative PDN SAE GW; Priority between the PDN SAE GW that comprises in the chain of command IP address list of perhaps alternative PDN SAE GW and this tabulation;
The Serving SAE GW that this MME selectes is according to described specific information selecting PDN SAE GW.
2. the method for claim 1 is characterized in that, when described MME selectes Serving SAEGW, notifies this Serving SAE GW with APN APN parameter; And
This Serving SAE GW selects satisfactory PDN SAE GW according to described APN parameter.
3. method as claimed in claim 2 is characterized in that, selected Serving SAE GW and the PDN SAE GW of MME closes when establishing, preferential this PDN SAE GW of this Serving SAE GW.
4. method as claimed in claim 3, it is characterized in that, described Serving SAE GW selectes when closing the PDN SAE GW that establishes with it, Serving SAE GW analyzes the chain of command IP address list that described APN obtains the PDN SAE GW of this ServingSAE GW outside, and selects satisfactory PDN SAE GW according to strategy from this tabulation.
5. method as claimed in claim 4 is characterized in that, the selected situation of closing the PDN SAE GW that establishes with it of described Serving SAE GW comprises one of following at least:
Because this PDN SAE GW is the ability of the described APN of configuration process not, not selected this PDN SAE GW of Serving SAE GW;
Owing to the load sharing reason, not selected this PDN SAE GW of Serving SAE GW.
6. method as claimed in claim 2, it is characterized in that, when described Serving SAE GW does not close the PDN SAE GW that establishes with it, Serving SAE GW analyzes the chain of command IP address list that described APN obtains PDN SAEGW, and selects satisfactory PDN SAEGW according to strategy from this tabulation.
7. the method for claim 1 is characterized in that, when described MME selectes Serving SAEGW, notifies this Serving SAE GW with the chain of command IP address list of alternative PDN SAE GW; And
This Serving SAE GW selects satisfactory PDN SAE GW from this tabulation.
8. method as claimed in claim 7, it is characterized in that, during the selected Serving SAEGW of described MME, notify this Serving SAE GW with the priority between each PDN SAE GW that comprises in the chain of command IP address list of alternative PDN SAE GW and this tabulation; And
This Serving SAE GW is according to the satisfactory PDN SAEGW of priority selective sequential from high to low.
9. method as claimed in claim 8, it is characterized in that, when described MME selectes Serving SAEGW, the chain of command IP address setting of a selected alternative PDN SAEGW is a high priority from the chain of command IP address list of alternative PDN SAE GW, and the chain of command IP address setting of other alternative PDN SAE GW is a low priority in will tabulating, and notifies this Serving SAE GW; And
The alternative PDN SAE GW of the preferred described high priority of this Serving SAE GW;
When setting up the carrying failure as the alternative PDN SAE GW of the selected described high priority of this Serving SAE GW or with the alternative PDN SAE GW of this high priority, this Serving SAE GW is according to selecting satisfactory PDN SAE GW among the alternative PDN SAE GW of strategy low priority from described tabulation.
10. the method for claim 1 is characterized in that, when described MME selectes Serving SAEGW, notifies this ServingSAE GW with chain of command IP address and the APN parameter of alternative PDN SAE GW; And
The preferred described alternative PDN SAE GW of this Serving SAE GW;
When setting up the carrying failure as the not selected described alternative PDN SAE GW of this Serving SAE GW or with this alternative PDNSAE GW, this Serving SAE GW selects satisfactory PDN SAE GW according to described APN parameter.
11. method as claimed in claim 10, it is characterized in that, as the not selected described alternative PDN SAE GW of described Serving SAE GW, and this Serving SAE GW and PDN SAE GW close when establishing, perhaps described Serving SAE GW and this alternative PDN SAE GW set up the carrying failure, and this Serving SAE GW and PDN SAE GW close when establishing, and this Serving SAE GW preferably closes the PDN SAE GW that establishes with it.
12. method as claimed in claim 11 is characterized in that, described Serving SAE GW selectes when closing the PDN SAE GW that establishes with it, and Serving SAE GW analyzes described APN and obtains this Serving
The chain of command IP address list of the PDN SAE GW of SAE GW outside, and according to strategy satisfactory PDN SAE GW of selection from this tabulation.
13. method as claimed in claim 12 is characterized in that, the selected situation of closing the PDN SAE GW that establishes with it of described Serving SAE GW comprises one of following at least:
Because this PDN SAE GW is the ability of the described APN of configuration process not, not selected this PDN SAE GW of Serving SAE GW;
Owing to the load sharing reason, not selected this PDN SAE GW of Serving SAE GW.
14. method as claimed in claim 10 is characterized in that, as the not selected described alternative PDN SAE GW of described Serving SAE GW, and this Serving SAE GW does not close the PDN that establishes with it
During SAE GW, Serving SAE GW analyzes the chain of command IP address list that described APN obtains PDN SAE GW, and selects satisfactory PDN SAE GW according to strategy from this tabulation.
15. as claim 4,5,6,7,8,9,12 or 14 described methods, it is characterized in that, comprise the chain of command IP address of at least two PDN SAE GW in the chain of command IP address list of described PDN SAE GW.
16. select the system of packet data network System Architecture Evolution gateway entity PDN SAE GW among the SAE, it is characterized in that, comprising: MME, Serving SAE GW and PDN SAE GW; Wherein,
MME, be used in the flow process of setting up carrying, select Serving SAE GW, and the customizing messages that will be used for described Serving SAE GW selection PDN SAE GW is sent to Serving SAE GW, wherein, described customizing messages comprises the chain of command IP address list of APN APN parameter and/or alternative PDN SAE GW; Priority between the PDN SAE GW that comprises in the chain of command IP address list of perhaps alternative PDN SAE GW and this tabulation;
Serving SAE GW is used for according to described specific information selecting PDN SAE GW.
17. system as claimed in claim 16 is characterized in that, described MME notifies selected Serving SAE GW with the APN parameter;
Described Serving SAE GW selects PDN SAE GW according to the APN parameter of MME notice.
18. system as claimed in claim 17 is characterized in that, described Serving SAE GW determines that itself and PDN SAE GW close and establishes, then preferential this PDN SAE GW.
19. system as claimed in claim 16 is characterized in that, described MME notifies selected Serving SAE GW with the chain of command IP address list of alternative PDN SAEGW;
Described Serving SAE GW selects satisfactory PDN SAEGW from the tabulation of MME notice.
20. system as claimed in claim 16 is characterized in that, described MME notifies selected Serving SAE GW with chain of command IP address and the APN parameter of alternative PDN SAEGW;
The described alternative PDN SAE GW of the preferred MME notice of described Serving SAE GW;
Described Serving SAE GW selectes described alternative PDN SAE GW or sets up the carrying failure with this alternative PDNSAE GW, and then this Serving SAE GW selects satisfactory PDN SAE GW according to the described APN parameter of MME notice.
21. a Mobility Management Entity is characterized in that, comprising:
Selected cell is used to select Serving SAE GW;
Transmitting element, be used for parameter with APN, or with the chain of command IP address list of alternative PDN SAE GW, or the chain of command IP address of alternative PDN SAE GW and APN parameter are carried on and set up in the bearing request message, and send to the selected Serving SAE GW of selected cell, make this Serving SAE GW according to setting up the Information Selection PDN SAE GW that carries in the bearing request message.
22. a service system architecture evolution gateway entity is characterized in that, comprising:
Receiving element is used for the bearing request message of setting up that the receiving mobility management entity sends;
Extraction unit is used for extracting the APN parameter from the bearing request message of setting up that receiving element is received, or the chain of command IP address list of alternative PDN SAE GW, or the chain of command IP address of alternative PDN SAE GW and APN parameter;
Selected cell is used for the satisfactory PDN SAE of the Information Selection GW that extracts according to extraction unit.
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| US8654716B2 (en) * | 2008-11-14 | 2014-02-18 | Futurewei Technologies, Inc. | System and method for name binding for multiple packet data network access |
| CN101883352B (en) * | 2009-05-08 | 2013-10-09 | 三星电子株式会社 | Method for supporting PDNGW selection |
| CN101720119B (en) * | 2009-05-27 | 2012-06-13 | 中兴通讯股份有限公司 | Method and system for realizing PDN connecting selection |
| CN102056321B (en) | 2009-10-30 | 2014-07-02 | 中兴通讯股份有限公司 | Method and system for realizing local access |
| CN102056129A (en) * | 2009-11-05 | 2011-05-11 | 中兴通讯股份有限公司 | Establishing method and device of local Internet protocol (IP) access connection |
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