CN101483585B

CN101483585B - Method for gateway selection

Info

Publication number: CN101483585B
Application number: CN200810087916XA
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: 2011-09-14
Anticipated expiration: 2028-03-19
Also published as: CN102307340B; CN101483585A; CN102307340A; WO2009092237A1

Abstract

The invention discloses a gateway selecting method comprising that a mapping table requester sends a network configuration request to a mapping table owner; the mapping table owner sends a mapping table of mobility management protocol ability of APN to the mapping table requester. The invention also discloses another gateway selecting method comprising that an access control function entity selects a gateway and obtains the address of data gateway according to the mobility management protocol ability of APN. The invention also discloses a gateway selecting device comprising a transmit-receive unit, an enquiring unit and a processing unit. According to the invention, a data gateway and a local service gateway can be selected flexibly to assure the consistency 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, as Global Communications System (Global for MobileCommunications, GSM), universal mobile telecommunications system (Universal MobileTelecommunications 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, can't provide high access rate, 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 business of two-forty 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 schematic diagram 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 are at mobile management, also designed different agreements, in the communication network of this fusion, at least the agreement that has comprised two kinds of mobile management, (GenralPacket 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 agreements has the different characteristics 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 (MobileApplication Protocol, MAP), can finish 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 be in conjunction with 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 the communication network in many network integrations in GTP agreement and MIP agreement.Different agreements also corresponding the different network architecture and device processes functions, the tenability of different agreement has determined whether a network equipment can realize intercommunication with another equipment.

Access Network provides basic wireless connections ability, various access technologies all need to arrange to have the Access Network of technical characterstic separately, and by 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 terminal core net, 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 of terminal, the IP address that terminal is used to carry out Operational Visit may 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 link 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.Terminal is by the 3GPP access network, no matter terminal is in ownership place is still visited ground, all need to insert the data gateway access service by 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 (non-roaming) of operator inside.

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

As shown in Figure 1, shared core controlled entity for the user management user contracting data, the maintenance terminal relevant location information that insert by 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 AAAProxy is the local core controlled entity in visit ground.Mobility Management Entity, as 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 by 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.

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, PDN1 as shown in fig. 1 and PDN2, different PDN can (Access Point Name APN) identifies, and the IP address that terminal is used 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 terminal can be visited generally is stored on shared core controlled entity or the local core controlled entity as CAMEL-Subscription-Information.Terminal also can want the APN that visits to indicate terminal to controlled entity with different modes, but only as decision references, the APN of Shi Yonging is determined by the network control entity at last.When terminal initially inserts from the 3GPP Access Network, network side entity (generally being Mobility Management Entity) can be by the mode of inquiry APN, and by 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 terminal is when non-3 GPP access network initially inserts, terminal can be from the address that core controlled entity (HSS or AAA Server or AAA Proxy) directly obtains the network anchor point data gateway when access authentication, or the APN that is obtained during by 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 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 may 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 terminal was switched between different access networks, 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 by 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 as 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 terminal inserted by the 3GPP Access Network, Mobility Management Entity was responsible for the network anchor point information of terminal is registered on the shared core controlled entity.When terminal inserted by non-3 GPP access network, network anchor point was registered to network anchor point information on the shared core controlled entity by local core controlled entity.When terminal is switched between 3GPP Access Network and non-3 GPP access network, shared core controlled entity sends to 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 terminal switch to like this, can obtain the address of same network anchor point by 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, 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 may 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 may be 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 determine 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.When if user terminal inserts at visit ground non-3 GPP access network, 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 provides Operational Visit for terminal.

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, be by the local core controlled entity of ownership place in the non-3 GPP access network, the non-3 GPP access network gateway is formed jointly, 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 by 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, at the gateway of supporting different mobility management protocols (as 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 described correspondence table sends the mobility management protocol ability of APN APN to the requesting party of correspondence table; Described correspondence table is the correspondence table that comprises the mobility management protocol ability of described 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 described user profile; This access control function entity is selected gateway according to the mobility management protocol ability of described 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, the mobility management protocol ability that is used for the APN that obtains according to described query unit and described APN is 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 data gateway of the APN correspondence of DNS Server searching user's information, also be used for the IP address of the data gateway of the APN correspondence that can use to DNS Server inquiring user; 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 described Transmit-Receive Unit to select to described 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 schematic diagram that merges in the prior art;

Fig. 2 is a data gateway naming method schematic diagram in the embodiment of the invention;

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

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

Fig. 5 is the schematic diagram 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 by 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, as 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 the data gateway of certain mobility management protocol and one to can be used for inquire address in network, and unique within the specific limits name is set up corresponding relation, 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 the data gateway called after PDN GW NAME B of mobile IP, the called after PDN GW NAMEC 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 may connect a plurality of PDN, and as the PDN among Fig. 21, PDN 2.At this moment data gateway can have different names, and representative inserts different PDN respectively, as PDN GW4:NAME B-PDN 1, NAME Y-PDN 2; PDN GW5:NAME C-PDN 1, NAMEX-PDN 2).

The mobility management protocol type of indication includes but not limited to GTP, mobile IP etc. in the embodiment of the invention.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 at 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 also can identify with APN_gtp_mip with APN 1_gtp or APN 1_mip sign.

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 suitable data gateway, insert the mode of core net, for example when terminal is passed through the non-3 GPP access network access service, if terminal is in ownership place, then select gateway interface 3 directly to visit, if terminal is in visit ground, then terminal can also be visited by the mode of gateway interface 1-2 chain, select suitable local service gateway (at 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 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 may 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 by increasing different APN.Between carrier network, share the correspondence table of these APN and mobility protocol ability by static or dynamic mode, 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, perhaps APN C sign.

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 inquire about this user to need the carrier network at the data gateway place of grappling to the entity of preserving correspondence table (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 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 may dispose some on the access zone network access control function entity 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 the APN of these local configurations by 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, do not need to 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 may 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 determining, 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 by 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 QualifiedDomain 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 by 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 the data gateway of APN representative 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.To carry out the required parameter of the method for DNS data query gateway address is supported mobility protocol in conjunction with this APN ability 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 DNS Server inquires about that this APN points to is determined 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 the FQDN that each row APN correspondence is shown in a tabulation in correspondence table shown in Figure 5.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

APN+protocol capability=FQDN

APN?1 GTP FQDN?A

APN?1 MIP FQDN?B

APN?2 GTP FQDN?D

APN?3 MIP FQDN?E

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, do not need to 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 the entity of correspondence table is inquired about this user to need the data gateway place carrier network of grappling (generally is belonging area network in preserving Fig. 5, 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 may dispose some on the access zone network access control function entity 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 the APN of these local configurations by 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 may 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 determining, 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 by 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 may 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, as FQDN.

Above three kinds of schemes specifically told about the method for the mobility management protocol ability correspondence 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, by existing method, i.e. name query mechanism, what can obtain to determine passes through the address list that certain mobility management protocol is visited the data gateway of this PDN.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 by 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 by 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.

Method one adopts the mode of requesting party's active request correspondence table information of correspondence table, and 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 send 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 to send.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 data gateway of DNS Server inquiry APN correspondence, and this step is an option;

Step 703: the owner of correspondence table if carry out step 702, then also sends the IP address of the data gateway of APN correspondence to the mobility management protocol ability correspondence table that the requesting party of correspondence table sends 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 specific 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 be 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, then can also carry the mobility management protocol that uses when the mobility management protocol ability of 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 and/or user connect this data gateway address of visiting in this answer message 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 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 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 be selected the local service gateway.

Step 807: if 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 obtains and APN in step 804 or step 805, 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, may also comprise the mobility management protocol ability of this data gateway.Switch for 3GPP inside, the active user is carrying out the address of data gateway of Operational Visit and the mobility management protocol type of using (the mobility management protocol ability that may also comprise this data gateway) is obtained from the mobility context, 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 may 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.

Switching for 3GPP access network inside, after carrying is set up and to be finished, target mobility management entity will obtain mobility management protocol, source Mobility Management Entity that the user just using and allow the APN that visits and the mobility management protocol ability of APN to deposit on the shared core controlled entity 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.

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 by gateway interface 3 modes, when roaming, can also visit) by 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 by 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 be selected the local service gateway.

In this step, the selection of local service gateway may 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 the user is carrying out the IP address of data gateway of Operational Visit and the information such as mobility management protocol ability of this data gateway 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 in user's (contracting) information and APN, local core controlled entity location be can also carry and the APN and the mobility management protocol ability thereof of this user capture allowed, 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 user who obtains (or the storage of local core controlled entity) in this message and carry out the mobility management protocol that uses when the data gateway address of Operational Visit and mobility management protocol ability and/or user connect this data gateway address of visiting.

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 that sends in this step also will be carried the local service gateway address, may 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 mobility management protocol ability of APN selects the mode of user access core network access service (when ownership place in the user profile, by 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 by 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 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 DNSServer 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 obtains in step 908 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 determining the user access core network access service then may further comprise the steps 911-step 913 for the mode by 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 determining 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, by 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) by gateway interface 3 chains if determine 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 may 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: data gateway can store address, mobility management protocol ability and/or the mobility management protocol that uses when connecting the data gateway that visit of user of oneself in the shared core controlled entity (or local core controlled entity, generally be the local core controlled entity of ownership place) into.

If terminal is initiated new service request 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 data gateway of described APN correspondence in the then described 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 described inquiry.

For the switching of non-3GPP access technology inside, the mobility management protocol ability of the mobility management protocol that the target access network access control entity just may obtain to use when address, mobility management protocol ability and/or the user of the data gateway of access service connect this data gateway of visiting 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 data gateway of the APN of DNS searching user's information correspondence; The IP address that also is used for the data gateway of the APN correspondence that can use to the DNS inquiring user.

Processing unit, the mobility management protocol ability that is used for the APN that obtains according to query unit and 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 data gateway of the mobility management protocol ability of above-mentioned APN and/or described APN correspondence.

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 by 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 terminal of different access technologies is supported the Access Network of different mobility management protocols, can select suitable data gateway and local service gateway flexibly under roaming and non-roaming scene, 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 specific case herein 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 all can change in specific embodiments and applications, 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 owner of described correspondence table sends the mobility management protocol ability of APN APN to the requesting party of described correspondence table;

Described correspondence table is the correspondence table that comprises the mobility management protocol ability of described APN;

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

2. the method for claim 1 is characterized in that, the APN in the described correspondence table is corresponding with the mobility management protocol ability of data gateway;

Described data gateway is visited same grouped data network PDN, but supports different mobility management protocol abilities.

3. as any described method of claim among the claim 1-2, it is characterized in that, can also comprise any one in fully qualified domain name FQDN, PDN sign, the described APN belonging network operator sign in the described mobility management protocol ability correspondence table.

4. method as claimed in claim 3 is characterized in that, described FQDN comprises the mobility management protocol ability of described APN and described APN.

5. method as claimed in claim 3 is characterized in that, when the owner of described correspondence table sends the mobility management protocol ability of APN to the requesting party of correspondence table, also sends the IP address of the data gateway of described APN correspondence.

6. method as claimed in claim 3 is characterized in that,

The owner of described correspondence table is: the shared core controlled entity of the operator of the data gateway of the described APN indication of control in the described 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 described correspondence table is: Access Network controlled function entity, or the local network configuration database of requesting party's network of correspondence table.