CN102307340A

CN102307340A - Gateway selection method

Info

Publication number: CN102307340A
Application number: CN201110269719.1A
Authority: CN
Inventors: 靳维生; 朱文若
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2008-01-07
Filing date: 2008-03-19
Publication date: 2012-01-04
Anticipated expiration: 2028-03-19
Also published as: CN102307340B; CN101483585A; WO2009092237A1; CN101483585B

Abstract

The embodiment of the invention discloses a gateway selection method, which comprises that: a mapping table requester transmits a network configuration request to a mapping table owner; and the mapping table owner transmits a mobility management protocol capability mapping table of access point names (APN) to the mapping table requester. The embodiment of the invention also discloses another gateway selection method, which comprises that: an access control function entity selects a gateway according to the mobility management protocol capability of the APN, and acquires the address of the data gateway. The embodiment of the invention also discloses a gateway selection device, which comprises a transceiver unit, a query unit and a processing unit. The embodiment of the invention can flexibly select the data gateway and a local serving gateway and ensure the continuity of user services.

Description

The method that a kind of gateway is selected

Technical field

The embodiment of the invention relates to moving communicating field, relates in particular to a kind of method that realizes that gateway is selected.

Background technology

Conventional telecommunication network; Wireless communication networks particularly; Like Global Communications System (Global for Mobile Communications; GSM), universal mobile telecommunications system (Universal Mobile Telecommunications System; UMTS) etc.; Possess advantages such as class of business is abundant, the network control ability is strong; But because the wireless communication system frequency resource is limited, transmission environment is abominable etc. factor; High access rate can't be provided, and emerging wireless access wide band technology these shortcomings have well been remedied.With WLAN (wireless local area network) (Wireless Local Area Network; WLAN) and World Interoperability for Microwave Access, WiMax (Worldwide Interoperability for Microwave Access; WiMAX) can provide the broadband wireless access of two-forty professional for the wireless access wide band technology of representative; And support nomadic and mobile application, improved the access capability of radio communication greatly.Fusion between different networks becomes trend gradually; A kind of network architecture of new fusion also progressively is shaped; Be illustrated in figure 1 as the network architecture sketch map of fusion, top left region is to use 3GPP access network part, and lower zone right and wrong 3GPP access network part.

In the wireless communication system, user's mobility is a most important characteristic, and therefore, for cordless communication network, user's mobile management is one of most important component.Different wireless communication systems is to mobile management; Also designed different protocol; In the communication network of this fusion; At least the agreement that has comprised two kinds of mobile management; (Genral Packet Radio Service Tunnel Protocol GTP) and mobile IP protocol (Mobile IP), comprises that the user moves IP (Client Mobile IP to general packet wireless service tunnel protocol; CMIP) and proxy-mobile IP (Proxy Mobile IP, PMIP).The GTP agreement is mainly used in GPRS/UMTS and the evolvement network of some 3GPP based on them, and the MIP agreement is mainly used in the non-3GPP networks such as WiMAX, WLAN.

Different protocol has the different features and the scope of application.The GTP agreement is when providing the user mobility management; Session management can also be provided; Functions such as charging; In conjunction with mobile application protocol (Mobile Application Protocol; MAP); Can accomplish each side management and control, obtain using widely among the mobile network GPRS/UMTS of GTP agreement under the definition of 3GPP tissue user and network.At present, a special-purpose internet data network GRX of interconnected telecommunications has been set up in the whole world, and the GPRS/UMTS mobile network who reaches more than 300 is linked together, and has realized global roaming.And MIP agreement itself mainly provides the ability of mobile management, and it need combine other control protocol, and for example Diameter can provide complete management and the control ability of a cover to network and user.Owing to MIP technology simple and flexible, be adopted as the mobility management protocol of standard by the mobile network of multiple non-3GPP.Based on the consideration that multiple network merges, wireless core network of future generation can be selected the mobility management protocol of MIP as it, and finally might become the mobility management protocol of main flow.But at present, can long-time coexistence in GTP agreement and the communication network of MIP agreement in many network integrations.Different protocol also corresponding various network framework and device processes function, the tenability of different agreement determined a network equipment whether can with another equipment realization intercommunication.

Access Network provides basic wireless connections ability; Various access technologies all need arrange to have the Access Network of technical characterstic separately; And through certain method and common core or network or the business network of technology access; The communication system that realize to merge, for example GSM, GPRS, UMTS, WLAN, WiMAX and based on their the access technology Access Network of some evolution.IAD right and wrong 3GPP Access Network inserts the interface entities of UNE core net, can carry out certain control and management function thereon.

Data gateway is an entity that is in the core net border, is the terminal point of the secure tunnel between the core net of terminal, is the interface entities that the mobile network core network accessing group data network carries out Operational Visit.Data gateway may be responsible for implementing access strategy, be the end-filtration packet that reaching is terminal distribution IP address etc., also is the network anchor point of terminal when carrying out Operational Visit.User data is transmitting between core net and Packet Data Network after the polymerization of data gateway place.Network anchor point is the mobile anchor point on a large scale at terminal; The IP address that the terminal is used to carry out Operational Visit possibly obtain at this data gateway; This IP address need be registered on the data gateway, or is registered on the home agent of data gateway (perhaps with PDN that data gateway is connected in).Under the usual condition, in mobile subscriber business carries out,, should keep this IP address constant, and Access Network is fixed on this data gateway to the carrying anchor of data gateway for keeping professional continuity.

The local service gateway is the data anchor point that moves among a small circle of the 3GPP network terminal, is the interface entities of data gateway and Access Network 3GPP Access Network, is responsible for the routing forwarding of user data.The terminal is through the 3GPP access network; No matter the terminal is in ownership place is still visited ground; All need insert the data gateway access service through the local service gateway; Only illustrated the 3GPP Access Network to be in the situation on visit ground among Fig. 1; The situation that is in ownership place is similar; Being that gateway interface 1 among Fig. 1 can be (roaming) between cross operator, also can be operator's inner (non-roaming).

As shown in Figure 1, when the non-3 GPP access network access service is passed through at the terminal, the mode of multiple access core net is arranged.If the terminal is in ownership place, it is professional then directly to use gateway interface 3 to connect the data gateway access; If the terminal is in the roaming place, it is professional to connect the data gateway access through gateway interface 3, also can pass through gateway interface 2 connection roaming place gateways, and it is professional to connect the data gateway access through gateway interface 1 again.Gateway interface 1 can be to use the GTP agreement, also can use the PMIP agreement, and gateway interface 2 is all only supported the MIP agreement with interface 3.

As shown in Figure 1, shared core controlled entity for the user management user contracting data, the maintenance terminal relevant location information that insert through various access networks, provide and preserve authentication information.A kind of typical shared core controlled entity is HSS.Local core controlled entity provides management and controlled function for the network portion that adopts the MIP agreement, for example the user from the WiMAX network insertion is implemented Certificate Authority and charging etc.Local core controlled entity can adopt agreement such as Diameter to control other network entity.A kind of typical local core controlled entity is that authentication and authorization charging server AAA Server or AAA act on behalf of AAA Proxy, and wherein AAA Server is the local core controlled entity of ownership place, and AAA Proxy is the local core controlled entity in visit ground.Mobility Management Entity; Like Mobility Management Entity (the Mobility Management Entity that defines among the 3GPP; MME) or Serving GPRS Support Node (Serving GPRS Support Node; SGSN) be user storage and management identity information, mobility state information, security parameter etc., and the user is carried out Certificate Authority through the access of 3GPP Access Network.Along with going deep into of the network integration, Mobility Management Entity and local core controlled entity all might replace the other side, all can carry out access control to all access network types, and the processing of secure context is carried out in mobile management.

The terminal is after being attached to a kind of access network; Will select a network anchor point data gateway to be connected to outside (the Packet Data Network of Packet Data Network; PDN); PDN has a plurality of according to professional and network configuration; As shown in fig. 1 PDN 1 and PDN2; Different PDN can (Access Point Name APN) identifies, and the IP address that use at the terminal will be distributed or provided by the PDN network of outside by the network anchor point data gateway by different Access Point Names.APN is made up of network ID (Network Identifier) and/or carrier ID (Operator Identifier).Network ID is used for the definition of data gateway and inserts which external network, can also be used to defining the service request that user terminal is sent, and this part is to exist in APN.Carrier ID has defined data gateway and has been positioned in the GPRS backbone network of which operator, and this part is optional in APN.In the UNE, default APN, promptly terminal initial inserts the APN that acquiescence is used, and the APN that the terminal can be visited generally is stored on shared core controlled entity or the local core controlled entity as CAMEL-Subscription-Information.The terminal also can want the APN that visits to indicate to controlled entity at the terminal with different modes, but only as decision references, the APN of Shi Yonging is determined by the network control entity at last.When the terminal is initially inserted from the 3GPP Access Network; Network side entity (generally being Mobility Management Entity) can be through the mode of inquiry APN; And through name server (Domain Name Server; DNS) resolve the address that APN obtains the network anchor point data gateway; Select one of them, certainly directly configure fixing data gateway; And the terminal is when non-3 GPP access network initially inserts; The terminal can be from the address that core controlled entity (HSS or AAA Server or AAAProxy) directly obtains the network anchor point data gateway when access authentication, or the APN that is obtained during through access authentication by the non-3 GPP access network gateway is to DNS inquiry and the address that obtains the network anchor point data gateway.This shows that in different access technologies, the mode of obtaining network anchor point data gateway address also is different.When the terminal at different access technologies access network (3GPP Access Network and non-3 GPP access network; When switching different non-3 GPP access networks); Source network and objective network are that the network anchor point data gateway of terminal distribution maybe be just different; This just will cause the connection of User IP aspect to change; Cause conversation, the loss of data phenomenon takes place.Therefore, when switched between different access networks at the terminal, keeping the network anchor point data gateway not change was a basic demand that keeps business continuance.And when identical access technology Access Network (between the 3GPP Access Network, between identical non-3 GPP access network) switches, can guarantee that the network anchor point data gateway does not change through the user's context of source network and the shared access technology of objective network.

Network anchor point does not change when keeping switching between different access technologies, be with network anchor point information, and like user ID, user terminal IP address, parameters such as network anchor point data gateway IP address, APN information are saved on the core controlled entity.When the terminal was inserted through the 3GPP Access Network, Mobility Management Entity was responsible for the network anchor point information at terminal is registered on the shared core controlled entity.When the terminal was inserted through non-3 GPP access network, network anchor point was registered to network anchor point information on the shared core controlled entity through local core controlled entity.When switch between 3GPP Access Network and non-3 GPP access network at the terminal; Shared core controlled entity sends to the controlled entity in the objective network with the network anchor point address information of preserving; Be Mobility Management Entity or local core controlled entity; Which kind of network no matter the terminal switch to like this; Can obtain the address of same network anchor point through the core controlled entity, and then the assurance user data can not lost.

Because local service gateway and data gateway can have a lot of individual, gateway interface 1 can be to use the GTP agreement, also can be to use the PMIP agreement.Because network configuration, each local service gateway and data gateway all might only be supported the GTP agreement, an also all possible MIP agreement, and perhaps two kinds of agreements are all supported.That is to say; The data gateway that is linked into same PDN possibly have support mobility management protocol not of the same race (GTP or MIP); When using APN to come the data query gateway address, the data gateway in the data gateway address list that obtains possibly supported different mobility management protocols.And the mobility management protocol that uses on the gateway interface 1 must be consistent to the tenability of agreement with local service gateway and data gateway.For example, when user terminal initially inserts at the 3GPP Access Network, only support the MIP agreement if confirm the local service gateway, then the mobility management protocol that uses on the gateway interface 1 should be PMIP, and the data gateway of Xuan Zeing must be supported the MIP agreement so.If user terminal is when visiting ground non-3 GPP access network access, visit ground can only select to support that the gateway interface 1 of GTP agreement is the local service gateway, and then user terminal also can only be visited the data gateway access service that can support the GTP agreement.Equally, if user terminal is when the ownership place non-3 GPP access network inserts, the local controlled entity of ownership place can only select to support that the data gateway of MIP agreement is that the terminal provides Operational Visit.

Therefore working as user terminal initially inserts at the 3GPP Access Network; Perhaps user terminal is when non-3 GPP access network initially inserts, the agreement of how selecting to use on data gateway, local service gateway and the gateway interface 1 of correct this access mode of support become can normally support current visit the problem that must will solve.

The access control function entity that the control user inserts in the prior art (is a Mobility Management Entity in the 3GPP Access Network; Form jointly by the local core controlled entity of ownership place, non-3 GPP access network gateway in the non-3 GPP access network; Or form jointly by local core controlled entity in visit ground and non-3 GPP access network gateway) the data gateway address that can't obtain according to existing APN inquiry mechanism; Obtain the mobility protocol tenability of data gateway; And then can't select suitable data gateway and local service gateway; And indicate correct use mobility management protocol foundation of this local service gateway and the carrying between data gateway, for the user provides service.

The existing method that addresses this problem is that the method through network configuration fixedly installs; Make know (for example; Certain network) user is when using different access technologies; Use fixing data gateway and local service gateway, this gateway address, GTP and/or MIP agreement tenability are preserved by the access control function entity that user terminal inserts.But such mode has restricted the flexibility ratio of network arrangement greatly, upgrades, moves, is provided with when changing at the network of different operator control, can not these information of time update, and it is unsuccessful to cause user terminal to insert, or can't access service.In addition, how to support to span into the business continuance that switches between technology also be that problem to be solved is arranged to this mode.

Summary of the invention

The purpose of embodiment of the invention embodiment provides the method that a kind of gateway is selected; To solve in the evolvement network that multi-access technology merges; To the gateway of supporting different mobility management protocols (like GTP, mobile IP protocol); How to carry out network arrangement; And for guaranteeing business continuance; How to select suitable gateway, comprise the problem of data gateway, local service gateway and gateway interface agreement.

In view of this, the method that the embodiment of the invention provides a kind of gateway to select, this method comprises: the requesting party of correspondence table sends network configuration request to the owner of correspondence table; The owner of said correspondence table sends the mobility management protocol ability of APN APN to the requesting party of correspondence table; Said correspondence table is the correspondence table that comprises the mobility management protocol ability of said APN.

The method that the embodiment of the invention also provides a kind of gateway to select, this method comprises: access control function entity receives the user profile that the core controlled entity sends; This access control function entity obtains the mobility management protocol ability of APN APN in the said user profile; This access control function entity is selected gateway according to the mobility management protocol ability of said APN.

The embodiment of the invention also provides a kind of device that gateway is selected that is used for, and this device comprises Transmit-Receive Unit, is used for sending carrying foundation request to local service gateway or data gateway; Query unit; APN that is used for obtaining according to said query unit and the mobility management protocol ability of said APN are to shared core controlled entity searching user's information; Also be used for mobility management protocol ability to network configuration database or local core controlled entity searching user's information APN; Also be used for to the IP address of the corresponding data gateway of the APN of DNS Server searching user's information the IP address of the data gateway that the APN that also is used for can using to DNS Server inquiring user is corresponding; And processing unit; Any one of the APN that is used for selecting data gateway, user to use, local service gateway, user access core network access service mode; Also be used for forming FQDN according to the mobility management protocol ability of APN and APN; Be used for sending instruction message to Transmit-Receive Unit, data gateway or local service gateway that this instruction message indicates said Transmit-Receive Unit to select to said processing unit send carrying foundation request.

The method and apparatus that uses the embodiment of the invention to provide; Terminal that can the entity different access technologies; Support the Access Network of different mobility management protocols; Under roaming and non-roaming scene, can select suitable data gateway and local service gateway flexibly; And mobility management protocol access service, thereby the continuity of assurance customer service.

Description of drawings

Fig. 1 is the network architecture sketch map that merges in the prior art;

Fig. 2 is a data gateway naming method sketch map in the embodiment of the invention;

Fig. 3 is the sketch map of corresponding relation name solution one between APN and APN mobility management protocol ability in the embodiment of the invention;

Fig. 4 is the sketch map of corresponding relation name solution two between APN and APN mobility management protocol ability in the embodiment of the invention;

Fig. 5 is the sketch map of corresponding relation name solution three between APN and APN mobility management protocol ability in the embodiment of the invention;

Fig. 6 is the schematic flow sheet of the method one of sharing A PN and APN mobility management protocol ability correspondence table in the embodiment of the invention;

Fig. 7 is the schematic flow sheet of the method two of sharing A PN and APN mobility management protocol ability correspondence table in the embodiment of the invention;

Fig. 8 is the schematic flow sheet of the embodiment of the invention one;

Fig. 9 is the schematic flow sheet of the embodiment of the invention two.

Embodiment

Shared core controlled entity in the embodiment of the invention can be HSS, and local core controlled entity can be AAA Server or AAAProxy.When user terminal is in visit ground, AAA Proxy control and leading subscriber, AAA Proxy gets in touch through AAA Server and HSS, obtains user and home network information.Data gateway is based on the data gateway of the UNE that the early stage technology evolution of 3GPP network forms, and can support two kinds of different mobility management protocols of GTP agreement and MIP.Access control function entity is a Mobility Management Entity in the 3GPP Access Network, like MME or SGSN; In non-3 GPP access network local core controlled entity AAA Server of ownership place or AAAProxy; Or non-3 GPP access network gateway; Or form jointly, or forming jointly by visit local core controlled entity in ground and non-3 GPP access network gateway on visit ground by the local core controlled entity and the non-3 GPP access network gateway of ownership place.

In the embodiment of the invention, in the 3GPP network, user profile is stored on the shared core controlled entity, and in non-3GPP network, user profile can be stored in shared core controlled entity or be stored on the local core controlled entity.Under the situation of not specifying which network, the entity with the user profile storage in the embodiment of the invention is referred to as the core controlled entity.

The embodiment of the invention is to support data gateway and one of certain mobility management protocol in network, to can be used for inquire address; And unique within the specific limits name is set up corresponding relationship; The address that this name inquires has a plurality of; But these data gateways all have identical attribute; Promptly can be connected to identical PDN, and have identical mobility management protocol ability (only support GTP, only support mobile IP or both to support).As shown in Figure 2,, only support the data gateway called after PDN GW NAME A of GTP, only support to move the data gateway called after PDN GWNAME B of IP, the called after PDN GWNAME C that the both supports for the gateway that inserts PDN 1.This naming method can dominance be indicated certain agreement tenability, for example, when NAME names, indicates fields such as GTP or mobile IP.Also can formulate the table of corresponding relation between a PDN GW NAME title and the mobility protocol tenability by data gateway owner (operator); The relation of setting up data gateway name and mobility management protocol ability with dominance; Sharing this correspondence table between the different Access Networks or between the different carrier networks; For example use static or dynamic roaming agreement between operator; Or adopting the mode of inquiring about separately to the relation table owner by the Access Network access control entity, other network entities are given in indication.

A data gateway possibly connect a plurality of PDN, and like the PDN among Fig. 21, PDN 2.At this moment data gateway can have different names, and representative inserts different PDN respectively, like PDN GW4:NAME B-PDN 1, NAME Y-PDN 2; PDN GW5:NAME C-PDN 1, NAME X-PDN 2).

The mobility management protocol type of indication includes but not limited to GTP in the embodiment of the invention, moves IP etc.And if desired, these mobility management protocols also can further segment, and for example, mobile IP protocol can further be subdivided into PMIP, CMIP.For explaining conveniently, the following content of this paper is an example with GTP and mobile IP (MIP).

The embodiment of the invention provides three kinds of solutions that corresponding relation between APN and APN mobility management protocol ability is named, and is described successively below.

Scheme one

As shown in Figure 3; Directly will indicate the APN of certain PDN of visit to be subdivided into different APN more originally according to the mobility management protocol ability of data gateway; APN after the segmentation expands network ID or the carrier ID of APN, adds the field of dominance indication mobility management protocol ability.The field of original APN can continue to stay in the new APN with out of Memory such as indication PDN.As shown in Figure 3, network ID or carrier ID among the APN 1 of the former PDN of visiting 1 are expanded, increased gtp, mip, gtp/mip or similar field.Certainly; Reason owing to existing network configuration; For the data gateway of supporting certain mobility management protocol (as; Support the GPRS gateway service node GGSN of GTP agreement); Can not change the APN of corresponding its address; And, change the APN of corresponding its address only to the data gateway (supporting new mobility management protocol) that increases newly or newly upgrade.Have only an address and can support the data gateway of two kinds of mobility management protocols simultaneously for one; Can be put among the APN that only supports certain agreement; Also can be separately with different APN signs; For example; PDN GW 5 among Fig. 3 also can use APN 1_gtp or APN 1_mip sign, also can identify with APN_gtp_mip.

When the Access Network access control function entity obtains the APN of this redetermination; Mobility management protocol ability that just can the specified data gateway; And according to network actual conditions and local policy (comprising agreement between operator); Select the mode of suitable data gateway, access core net; For example when the non-3 GPP access network access service is passed through at the terminal; If the terminal is in ownership place; Then select gateway interface 3 directly to visit; If the terminal is in visit ground; Then the terminal can also be visited by the mode of gateway interface 1-2 chain; Select suitable local service gateway (to the 3GPP Access Network, perhaps non-3 GPP access network uses the mode of gateway interface 1-2 chain on visit ground).

When switching, the address of data gateway is brought target access network.Switching in the same access network type, the address of data gateway is generally passed to target access network by the context of this access network type from former Access Network.And stride the switching between different access network types, the address of data gateway generally is stored in shared core controlled entity or local core controlled entity, when user terminal inserts at target access network, obtains from shared core controlled entity or local core controlled entity.The address of local service gateway also can obtain with said method, but because the configuration reason of local service gateway possibly need gravity treatment.When gravity treatment took place, the Access Network access control entity was according to the signatory APN of user, and data gateway that the user is using or APN, local policy, roaming agreement (under roaming condition) etc. are selected suitable local service gateway.

Scheme two

As shown in Figure 4, do not change the structure of APN, indicate the same PDN of visit to support the data gateway of different mobility management protocol abilities, form corresponding form as shown in table 1 through increasing different APN.Between carrier network, pass through static or dynamic mode and share the correspondence table of these APN and mobility protocol ability; Also can adopt the mode of independent dynamic queries to know this corresponding relation; Also can add carrier network ID in the corresponding form and be listed as (, then should be listed as), PDN row as the reference of inquiring about if having operation trader network information in the APN.APN in the corresponding form is exactly the APN (comprising default APN) in the user terminal subscription data.Have only an address and can support simultaneously to be put into the data gateway of two kinds of mobility management protocols among the APN that only supports certain agreement for one, also can be separately with different APN signs.As shown in Figure 4, PDN GW 5 can be with APNA or APN B, and perhaps APN C identifies.

When user terminal when 3GPP or non-3 GPP access network insert; Access control function entity obtains the signatory APN (comprising default APN) of user in user contracting data; And the carrier network that needs the data gateway of grappling to belong to this user of entity inquiry who preserves correspondence table (generally is a belonging area network; During roaming; If adopt the Operational Visit mode of routing optimality; Also might be access zone network) APN and the correspondence table of mobility management protocol ability, obtain the mobility management protocol ability that these APN support.If user face data carries out routing optimality during roaming; Also possibly on the access zone network access control function entity, dispose some and be used for the APN of routing optimality, then the access zone network access control function entity can obtain the mobility management protocol ability of these local APN that dispose through inquiring about local APN and agreement tenability correspondence table.

Also APN and the mobility management protocol that allows the user to use can be stored on the shared kernel entity as CAMEL-Subscription-Information between operator (or user signing contract information).At this moment, need be between the different operators network correspondence table of sharing A PN and agreement tenability, need not inquire about this ability yet.

Table 1

APN	?PDN	Protocol capability	Carrier network ID
				APN?A	?PDN1	GTP	Carrier network X
APN?B	?PDN1	MIP	Carrier network X
				APN?C	?PDN1	GTP/MIP	Carrier network X
APN?	?PDN?	?	Carrier network?

For the situation of user terminal from the access of 3GPP Access Network; Mobility Management Entity according to Query Result (if PDN information is arranged; Information such as carrier network ID; Then comprehensive these information) and local policy etc.; Select suitable data gateway (inquiry DNS Server obtains the data gateway address), local service gateway; And when indication local service gateway is set up the gateway interface 1 of local service gateway and anchor point data gateway, the mobility management protocol type of data gateway address and employing is issued the local service gateway.

For the situation of user terminal from the non-3 GPP access network access; Access control function entity according to Query Result (if PDN information is arranged; Information such as carrier network ID; Then comprehensive these information) and local policy (comprising agreement between operator) etc.; Select the mode (also possibly further select data gateway) of suitable access service earlier; Select the local service gateway again (when roaming; If desired); And after selecting the local service gateway; When indication local service gateway is set up the gateway interface 1 of local service gateway and anchor point data gateway, the mobility management protocol type of data gateway address and employing is issued the local service gateway.If the function of data query gateway address is positioned at local core controlled entity; Then when local core controlled entity mails to non-3 GPP access network gateway data gateway address; The APN of this data gateway and the mobility management protocol of this APN support are issued the Access Network gateway; The data gateway address can be a data gateway address of confirming, also can be a tabulation.If the function of data query gateway address is positioned at the Access Network gateway, then local core controlled entity can be issued the non-3 GPP access network gateway through the APN (comprising default APN) of this non-3 GPP access network visit and the mobility management protocol ability of this APN with this user terminal.The mobility management protocol ability of APN (comprising default APN) and this APN can be a tabulation, if there is the business of the new APN of visit to initiate, directly judges whether to allow to set up at IAD.Also can be when the business initiation of the new APN of visit is arranged at every turn, by issuing the Access Network gateway after the local core controlled entity judgement.

Scheme three

As shown in Figure 5; Do not change the structure of APN; Continue to use original APN and the corresponding relation of PDN; What use defined is extended to different fully qualified domain names (Fully Qualified Domain Name, FQDN) the same PDN of indication visit and support the data gateway of different mobility management protocol abilities by APN.Between carrier network, share the correspondence table (or the mode that adopts independent dynamic queries is known this corresponding relation) of these APN and mobility management protocol ability through static or dynamic mode; Also can add carrier network ID row in the form (if having operation trader network information in the APN; Then should not be listed as), the PDN row are as the reference of inquiry.Different with second kind of scheme is, the mobility protocol ability that APN data represented gateway can be supported in this programme is meant the mobility protocol tenability of using all data gateways that this APN can parse, the i.e. union of all data gateway abilities.APN in this table is exactly the APN (comprising default APN) in the subscription data of user terminal.Combine this APN to support the ability of mobility protocol with carrying out the required parameter of the method for DNS data query gateway address with APN in the prior art; The FQDN that is built into (can be) to the network ID of APN or the expansion of carrier ID; As shown in table 2; Certain that is used for from this APN of DNS Server inquiry points to is confirmed the data gateway address of mobility management protocol ability; As shown in table 3, this tabulation is generally provided by the data gateway owner.

Above-mentioned FQDN also can directly be stored in the correspondence table of above-mentioned APN and mobility management protocol ability by the data gateway owner, promptly increases by a tabulation in correspondence table shown in Figure 5 and shows the corresponding FQDN of each row APN.At this moment, access control entity just can directly obtain to be used for the FQDN of data query gateway address when the mobility management protocol ability of inquiry APN.

Perhaps the FQDN in the correspondence table of the APN of the last storage of data gateway owner and mobility management protocol ability also can be by the title of network management personnel according to the actual demand definition.

Table 2

Table 3

FQDN	PDN GW IP address
		FQDN?A	PDN GW 1,2, the 5IP address
FQDN? B	PDN GW			3,4, the 5IP address
		FQDN?D	PDN GW 6, the 7IP address
FQDN?E	PDN GW 8, the 9IP address
		FQDN?	PDN GW? The IP address

Also APN and the mobility management protocol that allows the user to use can be stored on the shared kernel entity as subscription data (CAMEL-Subscription-Information or user signing contract information between operator).At this moment; The Access Network access control entity only need be formed the APN in the CAMEL-Subscription-Information and the mobility management protocol that allow to use FQDN and carry out the DNS inquiry and obtain the address of data gateway and get final product; Need be between the different operators network correspondence table of mobility management protocol ability of sharing A PN and APN, need not inquire about this ability yet.

When user terminal when 3GPP or non-3 GPP access network insert; Access control function entity obtains the signatory APN (comprising default APN) of user in user contracting data; And in preserving Fig. 5 this user of entity inquiry of correspondence table to need the data gateway place carrier network of grappling (generally be belonging area network; During roaming; If adopt the Operational Visit mode of routing optimality; Also might be access zone network) APN and the mobility management protocol ability correspondence table of APN, obtain the mobility management protocol ability that these APN can support.If user face data carries out routing optimality during roaming; Also possibly on the access zone network access control function entity, dispose some and be used for the APN of routing optimality, then the access zone network access control function entity can obtain the mobility management protocol ability of these local APN that dispose through inquiring about local APN and mobility management protocol ability correspondence table.

Insert for 3GPP; Mobility Management Entity according to Query Result (if PDN information is arranged; Information such as carrier network ID; Then comprehensive these information) and local policy etc.; Select the suitable data gateway; The local service gateway, and when indication local service gateway is set up the gateway interface 1 of local service gateway and anchor point data gateway, the mobility management protocol type of data gateway address and employing is issued the local service gateway.Use the address of the FQDN of APN and mobility management protocol ability composition to DNS Server query-relevant data gateway.

Insert for non-3GPP; Access control function entity according to Query Result (if PDN information is arranged; Information such as carrier network ID; Then comprehensive these information) and local policy etc.; Select the mode (also possibly further choose data gateway) of suitable access service earlier; Select the local service gateway again (when roaming; If desired); And after selecting the local service gateway; When indication local service gateway is set up the gateway interface 1 of local service gateway and anchor point data gateway, the mobility management protocol type of data gateway address and employing is issued the local service gateway.Use the address of the FQDN of APN and mobility management protocol ability composition to DNS Server query-relevant data gateway.If the function of data query gateway address is positioned at local core controlled entity; Then when local core controlled entity mails to non-3 GPP access network gateway data gateway address; The APN of this data gateway and the protocol capability of this APN support are issued the Access Network gateway; The data gateway address can be a data gateway address of confirming, also can be a tabulation.If the function of data query gateway address is positioned at the Access Network gateway; The protocol capability that then local core controlled entity can be supported this user terminal through APN (comprising default APN) and this APN of this non-3 GPP access network visit is issued the non-3 GPP access network gateway; By Access Network gateway structure FQDN, also can be the good FQDN of structure in the mobility management protocol ability correspondence table.The mobility management protocol ability that APN (comprising default APN) and this APN support (or the good FQDN of structure) can be a tabulation, if there is the business of the new APN of visit to initiate, directly judges whether to allow to set up at IAD.Also can be when the business initiation of the new APN of visit is arranged at every turn, by issuing the Access Network gateway after the local core controlled entity judgement.

In scheme two and the scheme three, APN and APN mobility management protocol ability correspondence table should include but not limited to the corresponding relation of APN and APN mobility management protocol ability, also possibly comprise information such as this APN belonging network carrier ID, PDN.The APN here can be the original APN under the standard definition meaning, also can be the title that common definition is arranged in the certain limit, like FQDN.

Above three kinds of schemes specifically told about the corresponding method of mobility management protocol ability of APN and data gateway and method how to obtain this information.In the scheme one, the store method of the new APN after expanding is the same with store method of the prior art, promptly is kept between user's subscription data, operator agreement, operator's local policy and carrying and sets up in the request.Any network node, through existing method, i.e. name query mechanism, the address list of the data gateway that passes through this PDN of certain mobility management protocol visit that can obtain to confirm.In scheme two and the scheme three; Because newly-generated correspondence table can be kept between operator in signatory or the user contracting data; Also can between different operators, share through static or dynamic mode; Perhaps be kept at one independently in the network entity; How the network entity that therefore must solve the request correspondence table through suitable mode obtains up-to-date correspondence table, or how to share the problem of correspondence table between the different operators network.The embodiment of the invention provides the acquisition methods of two kinds of correspondence table, describes respectively below.For convenience of explanation, the mobility management protocol ability correspondence table of APN abbreviates correspondence table as in following examples.

In these two kinds of methods, the requesting party of correspondence table can be the Access Network controlled entity, or the local network configuration database of requesting party's network of correspondence table.

Correspondence table Requested Party (being the owner of correspondence table) can be shared core controlled entity or other privately owned/total network configuration database of the carrier network of the control data gateway of APN indication in the correspondence table, also can be local core controlled entity or other privately owned/total network configuration database of requesting party's network of correspondence table.

The mode that method one adopts requesting party's active request correspondence table information of correspondence table, as shown in Figure 6, this method comprises

Step 601: the requesting method of correspondence table is referred to and is asked network configuration information; This solicited message can promptly be sent the request of an APN and APN mobility management protocol ability correspondence table separately for showing request; Perhaps, this solicited message is an implicit request, promptly is carried in the existing information and sends.Can also carry the information such as ID, PDN of APN operator in this solicited message.

Step 602: the owner of correspondence table sends APN and APN mobility management protocol ability correspondence table to the requesting party of correspondence table.

Method two adopts the mode of requesting party's active request correspondence table information of correspondence table.As shown in Figure 7, this method comprises:

Step 701: the requesting party of correspondence table sends APN (perhaps being the APN tabulation), the mobility management protocol ability of inquiry APN to the owner of correspondence table;

Step 702: the owner of correspondence table is to the IP address of the corresponding data gateway of DNS Server inquiry APN, and this step is an option;

Step 703: the mobility management protocol ability correspondence table that the owner of correspondence table sends APN to the requesting party of correspondence table, if carry out step 702, then also send the IP address of the corresponding data gateway of APN.

If the owner of correspondence table is a network configuration database here, then DNS Server can be arranged in same entity with this network configuration database.

More than be to the concrete implementation method of APN in the embodiment of the invention and APN mobility management protocol ability correspondence table and the method that network entity obtains this correspondence table, below how utilize this correspondence table to realize the method that gateway is selected in the explanation embodiment of the invention.Because in APN and the APN mobility management protocol ability corresponding relation implementation one; The store method of the APN of new expansion is the same with existing method; So it is the same to obtain the method for APN in the method that network entity obtains APN mobility management protocol ability and the existing method; Promptly obtain APN, just known the mobility management protocol ability of APN simultaneously.Use APN and APN mobility management protocol ability correspondence table, the i.e. method of scheme two or scheme three in following examples.

The embodiment of the invention provides the mobility management protocol ability correspondence table of a kind of APN of use and APN to select the method for gateway; This method has been described user terminal and has been inserted or when the Access Network of other types switches to the 3GPP Access Network selection course of data gateway, local service gateway and mobility management protocol from the 3GPP Access Network is initial.When the user roamed, data gateway can be positioned at different carrier networks with the local service gateway.Be illustrated in figure 8 as the schematic flow sheet of the embodiment of the invention, this flow process comprises:

Step 801: user terminal inserts Mobility Management Entity.

Step 802: Mobility Management Entity is to shared core controlled entity request user profile, and this solicited message can be carried in other message and sent, and also can send separately.

Step 803: the mobility management protocol ability of shared core controlled entity APN in the network configuration database searching user's information.This network configuration database is positioned at the user attaching network.This step is an option.

Step 804: shared core controlled entity is replied user's (contracting) information to Mobility Management Entity.If carried out the inquiry (or just have in the CAMEL-Subscription-Information APN mobility management protocol ability) of step 803, then can also carry the correspondence table of APN and APN mobility management protocol ability in this message.Switching for cross-over connection networking type; Promptly switch to the 3GPP Access Network, the mobility management protocol that mobility management protocol ability and/or the user that then can also carry IP address, this data gateway that the user who is stored in the shared core controlled entity carrying out the data gateway of Operational Visit in this answer message uses when connecting this data gateway address of visiting from non-3GPP net.

Step 805: if do not carry out the inquiry of step 803, the mobility management protocol ability of Mobility Management Entity APN in the network configuration database searching user's information in this step is then obtained the mobility management protocol ability correspondence table of APN and APN.This network configuration database can be positioned at the user attaching network, also can be positioned at the user visiting network.

Step 806: Mobility Management Entity is according to presetting the strategy selection of being correlated with; If promptly the terminal is initial access; Then consider the mobility management protocol ability of APN in network configuration cases, local policy and the user profile; The APN that the selection user can visit is (during roaming; This APN refers generally to the belonging area network data gateway; If adopt the Operational Visit mode of routing optimality; Can distribute the APN that points to visit ground data gateway by the Access Network access control entity), and select suitable local service gateway.If the terminal is to switch to the 3GPP network, then Mobility Management Entity also will and/or be visited the mobility management protocol that this data gateway using according to the mobility management protocol ability of the data gateway that carries out Operational Visit and selected the local service gateway.

Step 807: if the terminal is initial access, then Mobility Management Entity uses the operable APN of user that selects in the step 806 to DNS Server data query gateway address, selects the mobility management protocol of data gateway and/or use.If used herein is correspondence table implementation in the scheme two; Then Mobility Management Entity also will be formed FQDN; Be used for the DNS inquiry; If comprise FQDN in the mobility management protocol ability correspondence table of APN that perhaps in step 804 or step 805, obtains and APN, then Mobility Management Entity directly uses this FQDN to carry out the DNS inquiry.

Step 808: Mobility Management Entity sends the message indication to the local service gateway and sets up carrying, carries the mobility management protocol of data gateway address and use in this message.For the switching of striding different access network types; This message can also be carried the address of the data gateway that active user that Mobility Management Entity obtains carrying out Operational Visit and the mobility management protocol type of using from shared core controlled entity, possibly also comprise the mobility management protocol ability of this data gateway.Switch for 3GPP inside; The active user is carrying out address and the mobility management protocol type of using (the mobility management protocol ability that possibly also comprise this data gateway) of the data gateway of Operational Visit and from the mobility context, is obtaining, and the Mobility Management Entity of this mobility context before switch obtains.

Step 809: user terminal is accomplished to the carrying of data gateway and sets up.Deposit the address and the mobility management protocol type (the mobility management protocol ability that possibly also comprise this data gateway) of the data gateway that chooses (, just also having data gateway) in MM Context in access service for the switching that cross-over connection networks.Allow the APN and the mobility management protocol ability thereof of visit also to deposit MM Context in when the user inserts the local mobile management entity in the user signing contract information.

Step 810: the mobility management protocol that data gateway uses in the time of address, mobility management protocol ability and/or the user of oneself can being connected the data gateway of visiting stores shared core controlled entity into.

For the inner switching of 3GPP access network; After carrying set up to be accomplished, target mobility management entity will obtain APN that mobility management protocol, source Mobility Management Entity that the user just using allow to visit when the user inserts when address, its mobility management protocol ability and/or the user of the data gateway of access service connect the data gateway of visiting from the user mobility managing context and the mobility management protocol ability of APN is deposited on the shared core controlled entity.

The embodiment of the invention provides the mobility management protocol ability correspondence table of another kind of use APN and APN to select the method for gateway; This method has been described user terminal and has been inserted or when the Access Network of other types switches to non-3 GPP access network the selection course of data gateway, local service gateway and mobility management protocol from non-3 GPP access network is initial.When the user roamed, data gateway can be positioned at different carrier networks with the local service gateway, perhaps not necessarily can use the local service gateway.The method of present embodiment is equally applicable to the inside switching of non-3 GPP access network of the same race.Be illustrated in figure 9 as the schematic flow sheet of the embodiment of the invention two, this flow process comprises:

Step 901: user terminal inserts access control function entity.

Step 902: local core controlled entity is to shared core controlled entity request user profile, and this message can be carried in other message and send, and perhaps sends separately.

Step 903: the mobility management protocol ability of shared core controlled entity APN in the network configuration database searching user's information, this step is an optional step.

Step 904: shared core controlled entity is replied user's (contracting) information to local core controlled entity; If carried out the inquiry (or just have in the CAMEL-Subscription-Information APN mobility management protocol ability) of step 903, then can also carry APN and this APN mobility management protocol ability correspondence table in this message.Switching (or roaming) for cross-over connection networking type; This answer message can also be carried the IP address of the data gateway that the user who is stored in shared core controlled entity or the ownership place core controlled entity carrying out Operational Visit and the mobility management protocol ability of this data gateway, and/or the mobility management protocol that uses when connecting this data gateway address of visiting of user.

Step 905: if do not carry out the inquiry of step 903, the mobility management protocol ability of then local core controlled entity APN in the network configuration database searching user's information.

Step 906: local core controlled entity is according to presetting the strategy selection of being correlated with; User terminal initial access network even; Then consider network configuration cases; Local policy; Roaming agreement; The mobility management protocol ability of APN in the signatory and user profile of user; Select the mode of user access core network access service (when ownership place, directly to visit through gateway interface 3 modes; When roaming, can also visit) through the mode of gateway interface 1-2 chain; The APN that the user can visit is (during roaming; This APN refers generally to the belonging area network data gateway; If adopt the Operational Visit mode of routing optimality; Can distribute the APN that points to visit ground data gateway by the Access Network access control entity; If visit through gateway interface 3 modes; Then can only select to support the APN of MIP protocol capability) or data gateway, and can select suitable local service gateway (only to roaming).If user terminal is in the handoff scenario of roaming place, then local core controlled entity also will and/or be visited the mobility management protocol that this data gateway using according to the mobility management protocol ability of the data gateway that carries out Operational Visit and selected the local service gateway.

In this step, the selection of local service gateway possibly not carried out on local core controlled entity when the mode of user access core network access service and roaming, and carries out at the Access Network gateway.At this moment; Local core controlled entity is the APN user's (contracting) information that obtains from shared core controlled entity, and IP address and the information such as mobility management protocol ability of this data gateway that the user is carrying out the data gateway of Operational Visit send to the Access Network gateway.

Step 907: if APN or the data gateway of selecting the user to visit by local core controlled entity; Then for initial access; The operable APN of user that local core controlled entity can use above-mentioned selection is to DNS Server data query gateway address, and further selects data gateway.If correspondence table used herein is to adopt the implementation of correspondence table in the aforementioned schemes three, then local core controlled entity also will be formed FQDN, is used for the DNS inquiry; If comprise FQDN one row in the mobility management protocol ability correspondence table of perhaps obtaining in step 904 or the step 905, then local core controlled entity can directly carry out the DNS inquiry with this FQDN.

Step 908: local core controlled entity sends message to the Access Network gateway; This message is carried mobility management protocol ability correspondence table and/or local APN that can visit and the mobility management protocol ability of APN of APN and APN in user's (contracting) information; Can also carry the APN and the mobility management protocol ability thereof of this user capture of permission of local core controlled entity location; If APN or the data gateway of selecting the user to visit by local core controlled entity; And carried out the inquiry of step 907, then this message can also be carried the IP address (or IP address list) of the data gateway of selection, the mobility management protocol ability of this data gateway and/or the mobility management protocol of selection.For the switching of cross-over connection networking type, can also carry from shared core controlled entity the mobility management protocol that uses when data gateway address and mobility management protocol ability and/or user that the user who obtains (or the storage of local core controlled entity) carrying out Operational Visit connect this data gateway address of visiting in this message.

If the user uses the mode of gateway interface 1-2 chain to roam; And local core controlled entity has been selected the local service gateway; Then the message of sending in this step also will be carried the local service gateway address, possibly also comprise the mobility management protocol ability of local service gateway.

Step 909: if do not carry out the inquiry of step 903 or step 905, then in this step the Access Network gateway can searching user's information in the mobility management protocol ability of APN.

If the local core controlled entity selection of not being correlated with in the step 906; Then the Access Network gateway is according to presetting the strategy selection of being correlated with; Even user terminal is an initial access network; Then consider network configuration cases; Local policy; Roaming agreement; The user is signatory; The mode that the mobility management protocol ability of APN is selected the user access core network access service in the user profile is (when ownership place; Through gateway interface 3 modes; When the roaming place; Can also pass through the mode of gateway interface 1-2 chain); The APN that the user can visit is (when visiting through gateway interface 3 modes; Can only select to support the APN of mobile IP protocol ability) or data gateway, and can select suitable local service gateway (only to roaming).If the terminal is in the switching state of roaming place, the mobility management protocol that uses when then the Access Network gateway also will connect this data gateway address of visiting according to the mobility management protocol ability of the data gateway that carries out Operational Visit and/or user is selected the local service gateway.

Step 910: if do not carry out the inquiry of step 907; And select data gateway by the Access Network gateway; Then the Access Network gateway uses the operable APN of user that selects in the step 909 to DNS Server data query gateway address, and further selects data gateway.If use the implementation method of correspondence table in the aforementioned schemes two; Then the Access Network gateway also will be formed FQDN; Be used for the DNS inquiry; Contain FQDN in the mobility management protocol ability correspondence table of APN that perhaps in step 908, obtains and APN, then the Access Network gateway can directly use this FQDN to carry out the DNS inquiry.

If user's roaming, the mode of confirming the user access core network access service then may further comprise the steps 911-step 913 for the mode through gateway interface 1-2 chain.

Step 911: if by visiting the local core controlled entity selection in ground data gateway, then the local core controlled entity in visit ground can reach the mobility management protocol of confirming use with the data gateway address and issue the local service gateway.This step is an optional step.

Step 912: request is set up in the carrying that the Access Network gateway is initiated gateway interface 2 to the local service gateway.If carry out step 911, promptly the Access Network gateway has obtained relevant information in step 908, and then the Access Network gateway is issued the local service gateway with data gateway address and definite mobility management protocol that uses.

Step 913: the local service gateway is after request is set up in the carrying of receiving the gateway interface 2 that IAD is sent; Through data gateway address and the mobility management protocol indication that 911 steps or 912 steps obtain, initiate the carrying of gateway interface 1 to data gateway and set up request.

Step 914: be the mode (roaming or non-roaming state) through gateway interface 3 chains if confirm the mode of user access core network access service, then the Access Network gateway is set up request to the carrying of data gateway initiation gateway interface 3.The data gateway address can be that local core controlled entity sends, and also can be that Access Network gateway oneself is selected.

Step 915: user terminal is accomplished to the carrying of data gateway and sets up.User terminal with the address of the data gateway that chooses (, just also having data gateway) in access service for the switching that cross-over connection networks and the mobility management protocol type of selecting to use (the mobility management protocol ability that possibly also comprise data gateway) deposit the MM Context of this Access Network in.In the user signing contract information, the user inserts the APN that local Access Network access control entity allows visit, and the mobility management protocol ability also deposits the MM Context of this Access Network in.During this time the user inserted, the mode of permission user access core network access service also can deposit the MM Context of Access Network in.

Step 916: the mobility management protocol that data gateway uses in the time of address, mobility management protocol ability and/or the user of oneself can being connected the data gateway that visit stores in the shared core controlled entity (or local core controlled entity, generally be the local core controlled entity of ownership place).

If new service request is initiated at the terminal after access network, then this flow process is further comprising the steps of:

Step 917: the user sends APN (or APN tabulation), business that indication will insert or PDN to the Access Network gateway;

Step 918: the Access Network gateway sends request to local core controlled entity; The mobility management protocol ability of inquiry APN (or APN tabulation); Can also carry carrier network ID under the APN that will inquire about, PDN information etc. in the query messages; This query messages can send separately, also can be carried in other existing message to send;

Step 919: local core controlled entity is inquired about the IP address of the corresponding data gateway of above-mentioned APN (or APN tabulation) to DNS Server.Can also carry the IP address of the corresponding data gateway of said APN in the then said response to query message, also can carry the information such as network ID, PDN of the operator under the APN that will inquire about.The mobility management protocol ability of the perhaps FQDN of data gateway, and mobility management protocol ability and/or selection.This step is an option.

Step 920: local core controlled entity carries the mobility management protocol ability correspondence table of APN (or APN tabulation) to Access Network gateway response to query message in this message.If carry out step 919, then this answer message can also be carried the IP address of data gateway of the APN correspondence of said inquiry.

For the inner switching of non-3GPP access technology, the mobility management protocol ability of the mobility management protocol that the target access network access control entity just possibly obtain when address, mobility management protocol ability and/or the user of the data gateway of access service connect this data gateway of visiting, to use from the user mobility managing context, former Access Network access control entity allows user capture when the user inserts APN and this APN.

The embodiment of the invention also provides a kind of being used to carry out the access control function entity that gateway is selected, and this entity comprises: Transmit-Receive Unit, query unit, processing unit, wherein,

Transmit-Receive Unit is used for sending carrying foundation request to local service gateway or data gateway.

Query unit is used for to shared core controlled entity searching user's information; Also be used for mobility management protocol ability to network configuration database or local core controlled entity searching user's information APN; Also be used for IP address to the corresponding data gateway of the APN of DNS searching user's information; The IP address of the data gateway that the APN that also is used for can using to the DNS inquiring user is corresponding.

Processing unit, APN that is used for obtaining according to query unit and the mobility management protocol ability of APN are selected any one of APN that data gateway, user can use, local service gateway, user access core network access service mode; Also be used for forming FQDN according to the mobility management protocol ability of APN and APN, be used for sending instruction message to Transmit-Receive Unit, request is set up in data gateway or local service gateway transmission carrying that this instruction message indication transmitting element is selected to processing unit.

Above-mentioned access control function entity is in non-3GPP network the time; Can form jointly for the local core controlled entity and the non-3 GPP access network gateway of ownership place, or form jointly by visit local core controlled entity in ground and non-3 GPP access network gateway on visit ground.When access control function entity was made up of two kinds of entities, these two kinds of entities all had the above-mentioned functions unit, and have identical functions.And the query unit of Access Network gateway can also be used for the mobility management protocol ability to the APN of local core controlled entity inquiring user transmission; The Transmit-Receive Unit of local core controlled entity also is used for sending to the Access Network gateway IP address of the corresponding data gateway of mobility management protocol ability and/or the said APN of above-mentioned APN.

It more than is the description of the specific embodiment of method and apparatus that a kind of gateway that the embodiment of the invention provides is selected; The implementation method that comprises APN and APN mobility management protocol ability corresponding relation; Comprise through the APN structure, increase indication; Perhaps set up mapping table; Structure FQDN; And in terminal access or handoff procedure; Utilize above-mentioned corresponding relation to carry out the method that gateway (comprising data gateway, local service gateway) is selected, make the data network gateway of supporting different mobility management protocols to dispose and be connected on the identical PDN.The Access Network of different mobility management protocols is supported at the terminal of different access technologies, under roaming and non-roaming scene, can select suitable data gateway and local service gateway flexibly, and the mobility management protocol access service.

It more than is a kind of detailed introduction of selecting the method for gateway that the embodiment of the invention is provided; Used concrete example among this paper the principle and the execution mode of the embodiment of the invention are set forth, the explanation of above embodiment just is used to help to understand the method and the core concept thereof of the embodiment of the invention; Simultaneously, for one of ordinary skill in the art, according to the thought of the embodiment of the invention, the part that on embodiment and range of application, all can change, in sum, this description should not be construed as the restriction to the embodiment of the invention.

Claims

1. the method for the mobility management protocol ability correspondence table of a shared APN is characterized in that this method comprises:

The requesting party of correspondence table sends network configuration request to the owner of correspondence table;

The requesting party of said correspondence table receives the mobility management protocol ability of the APN APN that the owner of said correspondence table sends;

Said correspondence table is the correspondence table that comprises the mobility management protocol ability of said APN; APN in the said correspondence table is corresponding with the mobility management protocol ability of data gateway.

2. the method for claim 1 is characterized in that,

Said data gateway is used to visit same grouped data network PDN, and supports different mobility management protocol abilities.

3. the method for claim 1 is characterized in that, the APN in the said correspondence table specifically comprises with the mobility management protocol ability of data gateway is corresponding:

APN in the said correspondence table is corresponding with the mobility management protocol ability of all data gateways that can be parsed by said APN.

4. like any described method of claim among the claim 1-3, it is characterized in that, also comprise any one in fully qualified domain name FQDN, PDN sign and the said APN belonging network operator sign in the said mobility management protocol ability correspondence table.

5. method as claimed in claim 4 is characterized in that, said FQDN comprises the mobility management protocol ability of said APN and said APN.

6. method as claimed in claim 4 is characterized in that, in the time of said mobility management protocol ability that the requesting party of said correspondence table receives that the owner of said correspondence table sends, also receives the IP address of the corresponding data gateway of said APN.

7. method as claimed in claim 4 is characterized in that,

The owner of said correspondence table is: the shared core controlled entity of the operator of the data gateway of the said APN indication of control in the said correspondence table, or privately owned or total network configuration database, or the requesting party's of correspondence table local core controlled entity;

The requesting party of said correspondence table is: Access Network controlled function entity, or the local network configuration database of requesting party's network of correspondence table.

8. the method for the mobility management protocol ability correspondence table of a shared APN is characterized in that this method comprises:

The owner of correspondence table receives the network configuration request of requesting party's transmission of correspondence table;

The owner of said correspondence table sends the mobility management protocol ability of APN APN to the requesting party of said correspondence table;

9. method as claimed in claim 8 is characterized in that, said data gateway is used to visit same grouped data network PDN, and supports different mobility management protocol abilities.

10. method as claimed in claim 8 is characterized in that, the APN in the said correspondence table specifically comprises with the mobility management protocol ability of data gateway is corresponding:

11. like any described method of claim among the claim 8-10; It is characterized in that, also comprise any one in fully qualified domain name FQDN, PDN sign and the said APN belonging network operator sign in the said mobility management protocol ability correspondence table.

12. method as claimed in claim 11 is characterized in that, when the owner of said correspondence table sends the mobility management protocol ability of said APN to the requesting party of correspondence table, also sends the IP address of the corresponding data gateway of said APN.

13. the equipment of the mobility management protocol ability correspondence table of a shared APN is characterized in that this equipment comprises:

Be used for sending the device of network configuration request to the owner of correspondence table;

Be used to receive the device of the mobility management protocol ability of the APN APN that the owner of said correspondence table sends;

14. equipment as claimed in claim 13 is characterized in that, said data gateway is used to visit same grouped data network PDN, and supports different mobility management protocol abilities.

15. equipment as claimed in claim 13 is characterized in that, the APN in the said correspondence table specifically comprises with the mobility management protocol ability of data gateway is corresponding:

16. like any described equipment of claim among the claim 13-15; It is characterized in that, also comprise any one in fully qualified domain name FQDN, PDN sign and the said APN belonging network operator sign in the said mobility management protocol ability correspondence table.

17. equipment as claimed in claim 16; It is characterized in that; The said device that is used to receive said mobility management protocol ability also is used in the said mobility management protocol ability that the owner who receives said correspondence table sends, receiving the IP address of the corresponding data gateway of said APN.

18. the equipment of the mobility management protocol ability correspondence table of a shared APN is characterized in that this equipment is the owner of correspondence table, this equipment comprises:

Be used to receive the device of the network configuration request that the requesting party of correspondence table sends;

Be used for sending the device of the mobility management protocol ability of APN APN to the requesting party of said correspondence table;

19. equipment as claimed in claim 18 is characterized in that, said data gateway is used to visit same grouped data network PDN, and supports different mobility management protocol abilities.

20. equipment as claimed in claim 18 is characterized in that, the APN in the said correspondence table specifically comprises with the mobility management protocol ability of data gateway is corresponding:

21. like any described equipment of claim among the claim 18-20; It is characterized in that, also comprise any one in fully qualified domain name FQDN, PDN sign and the said APN belonging network operator sign in the said mobility management protocol ability correspondence table.

22. equipment as claimed in claim 21; It is characterized in that; The said device that is used to send said mobility management protocol ability also is used for when the requesting party to said correspondence table sends the mobility management protocol ability of said APN, sends the IP address of the corresponding data gateway of said APN.