CN103945493B - Select V-ANDSF method and devices, access network access method and device - Google Patents

Abstract

The invention discloses a kind of selection V ANDSF method and devices, access network access method and devices, are linked into the scene that 3GPP accesses net and WLAN simultaneously applied to UE（Different V ANDSF are deployed respectively）.Wherein, this method includes：UE sends ANDSF network elements to H ANDSF and selects request message（Carry the PLMN marks, the PLMN marks of the access technology parameter of 3GPP, WLAN and the access technology parameter of WLAN of 3GPP access nets）；UE receives the ANDSF network element Response to selection message that H ANDSF are sent, wherein the V ANDSF parameters of the V ANDSF of promising UE selections are carried in ANDSF network element Response to selection message.Through the invention, the strategy for being diverted to roaming carrier can be provided to UE by having reached operator so that UE can flexibly select access net, ensure the effect of the success rate and using effect of access.

Description

Select V-ANDSF method and devices, access network access method and device

Technical field

The present invention relates to the communications fields, in particular to a kind of selection V-ANDSF method and devices, access net access Method and device.

Background technology

In order to keep 3-G (Generation Three mobile communication system) in the competitiveness of the communications field, provide to the user rate faster, time delay Lower and more personalized mobile communication service, meanwhile, reduce the operation cost of operator, third generation affiliate meter It draws（3rdGeneration Partnership Project, referred to as 3GPP）Standard working group is just being dedicated to evolution grouping system System（EvolvedPacket System, referred to as EPS）Research.Entire EPS system is divided into wireless access network and core net two Part.Wireless access network is divided into 3GPP access nets and non-3 GPP access network.

Wireless access network is by evolution base station（EvolvedNodeB, referred to as eNB）With 3G radio network controllers （Radio Network Controller, referred to as RNC）Composition, it is mainly responsible for the transmitting-receiving of wireless signal, by connecing in the air Mouth and terminal contact manage radio resource, scheduling of resource and the access control of air interface.

In the core network, home subscriber server is contained（Home Subscriber Server, referred to as HSS）, move Mobility management entity（Mobility Management Entity, referred to as MME）, Serving GPRS Support Node（Serving GPRS Support Node, referred to as SGSN）, policy charging rule function（Policy and Charging Rule Function, referred to as PCRF）, gateway（Serving Gateway, referred to as S-GW）And packet data gateway（PDN Gateway, referred to as P-GW）.

Fig. 1 is the packet-based core networks that evolution is accessed according to the 3GPP and non-3 GPP access system of the relevant technologies（EPC）Knot Structure schematic diagram, as shown in Figure 1, EPS system supports 3GPP accesses.Wherein, HSS is the permanent storage place of user contracting data, Positioned at the ownership place of user's signing；MME is responsible for mobile management, the processing of Non-Access Stratum signaling and user mobility management up and down The control planes correlation functions such as the management of text；S-GW is the accessing gateway equipment being connected with 3GPP access nets, in 3GPP accesses and P- Data are forwarded between GW, and data are cached；P-GW is EPS and packet data network（Packet Data Network, Referred to as PDN）Borde gateway, be responsible for the access of PDN and its forward the functions such as data between EPS and PDN；PCRF is strategy And charging regulation function entity, it is connected with operator service network by receiving interface Rx, is responsible for providing charging control, online Diameter credit control, thresholding control and service quality（Quality ofService, referred to as QoS）；SGSN be GEARN and The service support node of UTRAN user access core network networks, it is functionally similar with mobility management entity, it is responsible for the position of user The functions such as update, paging management and bearer management.

As shown in Figure 1, EPS system also supports non-3 GPP access.Wherein, pass through S2a/S2b/ with the intercommunication of non-3 GPP access S2c interfaces realize, P-GW as the anchor point between 3GPP and non-3 GPP access, non-3 GPP access be divided into credit non-3 GPP access with Non- credit non-3 GPP access.Wherein, credit non-3 GPP access can directly be connect by S2a interfaces with P-GW, and S2a interfaces use generation The mobile IP of reason（Proxy Mobile IP, referred to as PMIP）Agreement carries out information exchange.Non- credit non-3 GPP access, which need to pass through, to be drilled Into packet data gateway（Evolved Packet Data Gateway, referred to as ePDG）It is connected with P-GW, ePDG and P-GW Between interface be S2b.S2c interfaces provide user equipment（User Equipment, referred to as UE）User between P-GW Face controls and mobility support, and the mobility protocol supported is the mobile IP v 6 for supporting double stacks（Mobile IPv6support for Dual Stack Hosts and Routers, referred to as DSMIPv6）.

The fast development of intelligent terminal and mobile Internet application so that mobile data flow is with speed difficult to the appraisal Degree increases sharply.For the development that flow pressure is effectively relieved, persistently pushes mobile communication business, the more and more operator's choosings in the whole world It selects and greatly develops WLAN（Wireless LocalArea Network, referred to as WLAN）, and using low cost, high band Wide WLAN shunts for Cellular Networks.

Access network discovery and selection function（Access Network Discovery and Selection Function, Referred to as ANDSF）As access anchor point, it can realize Intelligent network-selecting, by the interaction of network and terminal, realize network insertion Effectively shunting, meets the operation direction of the following multi-network cooperative.ANDSF generates strategy, and terminal user's selection is helped most preferably to access Network formats realize the collaboration of plurality of access modes.

In the prior art, ANDSF is proposed in R8 versions.When UE will select network to be registered, if simultaneously There are 3GPP access nets and non-3 GPP access network, EPS can be according to location information current UE, can to UE offers by ANDSF Access network discovery information or inter-system mobility strategy（Inter-System Mobility Policy, referred to as ISMP）, UE uses the information that ANDSF is provided, suitable access net selected to be registered.If existing simultaneously multiple non-3 gpp to connect It networks, EPS can be according to location information current UE, by ANDSF to routing policy between UE offer systems（Inter-System Routing Policy, referred to as ISRP）, UE uses the information that ANDSF is provided, suitable access net selected to be shunted.

Fig. 2 is according to the schematic diagram of the ANDSF frameworks of the relevant technologies, as shown in Fig. 2, ownership place access network discovery and selection Function（Home Access Network Discovery and Selection Function, referred to as H-ANDSF）With visit Visit ground access network discovery and selection function（VisitedAccess Network Discovery and Selection Function, referred to as V-ANDSF）It is connected with UE by S14 interfaces, which uses open mobile alliance device management （Open Mobile Alliance DeviceManagement, referred to as OMADM）Agreement.

In the prior art, ANDSF can solve the problems, such as that 3GPP is switched to the access network selection of non-3 gpp, can also solve multiple access The shunting routing problem of terminal, such as：Has and activates the UE of IP stream migration abilities（IP Flow Mobility Capable UE, referred to as IFOM capable UE）, the UE that has and activate multiple access PDN concatenation abilities（Multiple Access PDN Connectivity capable UE, referred to as MAPCON capable UE）, have and activate seamed The UE of WLAN shunt ability（Non-seamless WLAN offload capable UE, referred to as NSWO capable UE） Shunting routing problem.

WLAN technologies are also in sustainable development, hot spot 2.0（Hotspot2.0, referred to as HS2.0）Also referred to as next-generation heat Point（Next Generation Hotspot, referred to as NGH）, pass through Advertisement Server（Advertisement Server）By AP to UE push and the external network information of its intercommunication, for WLAN user provide seamless roam, seamless authentication ability so that WLAN user has the experience and impression close to cellular network User.

ANDSF can access the characteristic information of net with static configuration hot spot 2.0, and the characteristic information of the access net of hot spot 2.0 is in Fig. 2 Shown in transmit on S14 interfaces.

However, there are following defects for the prior art：

1, when UE accesses 3GPP and WLAN simultaneously, and 3GPP and WLAN are linked into different visit Public Land Mobile Network （Visited Public Land Mobile Network, referred to as VPLMN）When, the operator of each VPLMN may can A V-ANDSF is disposed, and the strategy of different V-ANDSF may have conflict, UE should select which VPLMN's The strategy of ANDSF is not yet clear.

2, in special time period and specific region, such as in intown peak period, operator may want to lead to Letter flow amount is diverted to its Roaming Partner, this Roaming Partner may be the operator of the access net of hot spot 2.0, it is also possible to non-hot The operator of 2.0 access nets.Effective coverage has been provided in ANDSF strategies（Validity Area）And effective time（Time ofDay）, can solve the problems, such as that intown peak period is diverted to the operator of other access technologies, but still need to examine The problem of worry is diverted to other Roaming Partners in this case.It is the field of the operator of the access net of hot spot 2.0 for Roaming Partner Scape can be accorded with by the organization identification of the prior art（Organization Identifiers, referred to as OIs）The domain and （Realms）It solves.But belong to the scene of the operator of non-hot 2.0 access net for Roaming Partner, it there is no solution.

（1）According to the prior art, in the WLAN of intercommunication（Interworking-WLAN, referred to as I-WLAN）It is real Applied public land mobile network（Public Land Mobile Network, referred to as PLMN）After selecting and selecting PLMN, ANDSF processes can be carried out, and the strategy that ANDSF is provided not yet includes that PLMN selects the relevant information of priority.In this way, Even if operator contains the service set identifier of Roaming Partner operator in ANDSF strategies（Service Set ID, referred to as For SSID）, UE can not also reselect another different PLMN can not select the SSID for belonging to this PLMN in turn.

（2）For not yet supporting the UE of 2.0 technology of hot spot, when realizing 3GPP with WLAN intercommunications, need to use I-WLAN Technology.But the possible decision of operator does not give UE to provide I-WLAN management objects（I-WLAN Management Object, letter Referred to as I-WLAN MO）.Alternatively, although operator provides I-WLAN MO to UE, information is not complete, or does not provide and appoint What the relevant information of WLAN.So, UE can not also reselect another different PLMN and then select to belong to this PLMN's SSID。

（3）For not yet supporting the UE of 2.0 technology of hot spot, if ANDSF shows to the UE strategies provided in specific time Section and specific region, SSID1 priority is high, and in other periods or other regions, just select SSID2.But according to I- WLAN processes, the PLMN priority lists in UE but show that SSID2 priority is higher than SSID1.However, in this policy conflict In the case of UE how to select SSID not yet clear.

It follows that the prior art not yet supports 2.0 technology of hot spot due to there are above-mentioned various technological deficiencies, necessarily causing UE cannot achieve roaming carrier access net selection.

Asking for the selection of the access net of roaming is cannot achieve for the UE of 2.0 technology of hot spot is not yet supported in the related technology Topic, currently no effective solution has been proposed.

Invention content

The present invention provides a kind of method and device of selection V-ANDSF, the cut-in methods and device of access net, at least It solves the above problems.

According to an aspect of the invention, there is provided a kind of method of selection V-ANDSF, is applied to user equipment（UE）Together When be linked into 3GPP access nets and WLAN（WLAN）Scene, wherein 3GPP accesses net and WLAN and deploys respectively not Same visited place access network discovery and selection function（V-ANDSF）, including：User equipment（UE）To ownership place access network discovery and Selection function（H-ANDSF）Send access network discovery and selection function（ANDSF）Network element selects request message, wherein ANDSF nets Member selection request message include：The public land mobile network of 3GPP access nets（PLMN）Mark 1, the access technology parameter 1 of 3GPP, The PLMN of WLAN identifies the access technology parameter 2 of 2 and WLAN；Select request message for UE according to ANDSF network elements in H-ANDSF After selecting V-ANDSF, UE receives the ANDSF network element Response to selection message that H-ANDSF is sent, wherein the selection of ANDSF network elements is rung Answer the V-ANDSF parameters that selectable V-ANDSF is carried in message.

Preferably, during H-ANDSF is that UE selects V-ANDSF, H-ANDSF is selected successively according to sequencing The V-ANDSF in the domain V-ANDSF, WLAN in 3GPP access network domain；In user equipment（UE）To ownership place access network discovery and Selection function（H-ANDSF）Send access network discovery and selection function（ANDSF）Before network element selects request message, this method is also Including：UE determines that 3GPP access nets and WLAN are respectively connected to different PLMN.

Preferably, V-ANDSF parameters include following one：The visited place access network discovery and selection function of V-ANDSF takes Business device title（Visited Access Network Discovery and Selection Function Server Name, Referred to as V-ANDSF-SN）, V-ANDSF IP address.

Preferably, after the ANDSF network element Response to selection message that UE receives that H-ANDSF is sent, this method further includes：UE According to V-ANDSF parameters access network information request message is sent to the V-ANDSF of selection（Access Network Information Request）, including：When V-ANDSF parameters are V-ANDSF-SN, UE uses V-ANDSF-SN into action State Host Configuration Protocol（Dynamic Host Configuration Protocol, referred to as DHCP）Inquiry or domain name system （Domain Name System, referred to as DNS）Inquiry obtains the address of V-ANDSF；UE is according to the address of V-ANDSF to V- ANDSF sends access network information request message.

According to another aspect of the present invention, a kind of device of selection V-ANDSF is provided, user equipment is located at（UE）, It is linked into 3GPP access nets and WLAN simultaneously applied to UE（WLAN）Scene, wherein 3GPP accesses net and WLAN points Different visited place access network discoveries and selection function are not deployed（V-ANDSF）, including：First sending module, for returning Possession access network discovery and selection function（H-ANDSF）Send access network discovery and selection function（ANDSF）Network element selection request Message, wherein ANDSF network elements selection request message include：The public land mobile network of 3GPP access nets（PLMN）Mark 1, The access technology parameter 1 of 3GPP, the PLMN of WLAN identify the access technology parameter 2 of 2 and WLAN；Receiving module, in H- After ANDSF selects request message to select V-ANDSF for UE according to ANDSF network elements, the ANDSF network elements that H-ANDSF is sent are received Response to selection message, wherein the V-ANDSF parameters of selectable V-ANDSF are carried in ANDSF network element Response to selection message.

Preferably, which further includes：Determining module, for sending ANDSF network elements to H-ANDSF in the first sending module Before selecting request message, determine that 3GPP access nets and WLAN are respectively connected to different PLMN.

Preferably, V-ANDSF parameters include following one：The visited place access network discovery and selection function of V-ANDSF takes The IP address for device title V-ANDSF-SN, V-ANDSF of being engaged in.

Preferably, which further includes：Second sending module is rung for receiving the selection of ANDSF network elements in receiving module After answering message, access network information request message is sent to the V-ANDSF of selection according to V-ANDSF parameters.

Preferably, the second sending module includes：Query unit, for when V-ANDSF parameters are V-ANDSF-SN, using V-ANDSF-SN carries out DynamicHost and agreement is arranged（DHCP）Inquiry or domain name system（DNS）Inquiry obtains the address of V-ANDSF； Transmission unit, for sending access network information request message to V-ANDSF according to the address of V-ANDSF.

According to a further aspect of the invention, a kind of device of selection V-ANDSF is provided, ownership place access net hair is located at Now and selection function（H-ANDSF）, it is applied to user equipment（UE）It is linked into 3GPP access nets and WLAN simultaneously （WLAN）Scene, wherein 3GPP accesses net and WLAN and deploys different visited place access network discoveries and selection function respectively （V-ANDSF）, including：Selecting module, for being user equipment（UE）In the domains V-ANDSF and WLAN out of 3GPP access network domain V-ANDSF in select a V-ANDSF；Sending module, for sending ANDSF network element Response to selection message to UE, wherein The V-ANDSF parameters of selectable V-ANDSF are carried in ANDSF network element Response to selection message.

Preferably, which further includes：Receiving module, for receiving the ANDSF network elements selection request message from UE, In, ANDSF network elements selection request message includes：The public land mobile network of 3GPP access nets（PLMN）The access of mark 1,3GPP Technical parameter 1, WLAN PLMN identify 2 and WLAN access technology parameter 2.

Preferably, V-ANDSF parameters include following one：The visited place access network discovery and selection function of V-ANDSF takes The IP address for device title V-ANDSF-SN, V-ANDSF of being engaged in.

Preferably, selecting module selects 3GPP to access successively during selecting V-ANDSF for UE according to sequencing The V-ANDSF in the domain V-ANDSF, WLAN in domain.

According to a further aspect of the invention, a kind of cut-in method of access net is provided, user equipment is applied to（UE） It is linked into 3GPP access nets and WLAN simultaneously（WLAN）Scene, wherein 3GPP accesses net and WLAN and deploys respectively Different visited place access network discoveries and selection function（V-ANDSF）, including：UE is according to inter-system mobility strategy and/or connects It networks and finds that information carries out target access network selection and switching determines；Wherein, inter-system mobility strategy includes following one：Mutually Logical WLAN（I-WLAN）It is preferred that access node, public land mobile network（PLMN）Domain leaf；Access network discovery information Including：The domains PLMN leaf.

Preferably, it further includes at least one of that I-WLAN, which selects access node,：I-WLAN belongs to Public Land Mobile Network （Home Public Land Mobile Network, referred to as HPLMN）Priority instruction leaf, HPLMN are directly accessed leaf Son, I-WLAN equities belong to Public Land Mobile Network（Equivalent Home Public Land Mobile Network, Referred to as EHPLMN）Display instruction leaf, optimum roaming list node, wherein optimum roaming list node includes：The domains PLMN leaf Son, PLMN priority leaf, service set identifier（Service Set Identifier, referred to as SSID）Leaf and SSID Priority leaf.

Preferably, the PLMN in the domains PLMN is the Roaming Partner operator that endorsed roaming agreement with home-operator PLMN。

According to a further aspect of the invention, a kind of access device of access net is provided, user equipment is located at（UE）, answer It is linked into 3GPP access nets and WLAN simultaneously for UE（WLAN）Scene, wherein 3GPP access net and WLAN difference Deploy different visited place access network discoveries and selection function（V-ANDSF）, including：Processing module, for according between system Mobility strategy and/or access network discovery information carry out target access network selection and switching determines；Wherein, inter-system mobility plan It slightly include following one：The WLAN of intercommunication（I-WLAN）It is preferred that access node, public land mobile network（PLMN）Domain leaf Son；Access network discovery information includes：The domains PLMN leaf.

Preferably, it further includes at least one of that I-WLAN, which selects access node,：I-WLAN belongs to Public Land Mobile Network （HPLMN）Priority instruction leaf, HPLMN are directly accessed leaf, I-WLAN EHPLMN display instructions leaf, optimizing roaming row Table node, wherein optimum roaming list node includes：The domains PLMN leaf, PLMN priority leaf, service set identifier（SSID） Leaf and SSID priority leaves.

Preferably, the PLMN in the domains PLMN is the Roaming Partner operator that endorsed roaming agreement with home-operator PLMN。

Still another aspect according to the present invention provides a kind of access device of access net, is located at access network discovery and choosing Select function（ANDSF）, it is applied to user equipment（UE）It is linked into 3GPP access nets and WLAN simultaneously（WLAN）Scene, Wherein, 3GPP accesses net and WLAN deploys different visited place access network discoveries and selection function respectively（V-ANDSF）, packet It includes：Indicating module is used to indicate UE and carries out target access network choosing according to inter-system mobility strategy and/or access network discovery information Select and switch decision；Wherein, inter-system mobility strategy includes following one：The WLAN of intercommunication（I-WLAN）It is preferred that connecing Ingress, public land mobile network（PLMN）Domain leaf；Access network discovery information includes：The domains PLMN leaf.

Preferably, it further includes at least one of that I-WLAN, which selects access node,：I-WLAN belongs to Public Land Mobile Network HPLMN prioritys instruction leaf, HPLMN are directly accessed leaf, I-WLAN EHPLMN display instructions leaf, optimum roaming list Node, wherein optimum roaming list node includes：The domains PLMN leaf, PLMN priority leaf, service set identifier（SSID）Leaf Son and SSID priority leaves.

Through the invention, it uses H-ANDSF to be sent to UE as the address of its selected V-ANDSF, enables UE according to this The mode of access network information request messages is initiated in a little addresses, or first by ANDSF to existing inter-system mobility strategy and/ Or access network discovery information is extended, then after the access network information request message for receiving UE access network is returned to UE Info response message solves and the UE of 2.0 technology of hot spot is not yet supported to cannot achieve roaming fortune so that UE is successfully selected access net Seek quotient access net selection the problem of, to reached operator can provide be diverted to its roaming carrier strategy to UE so that UE can flexibly select access net, ensure the effect of the success rate and using effect of access.

Description of the drawings

Attached drawing described herein is used to provide further understanding of the present invention, and is constituted part of this application, this hair Bright illustrative embodiments and their description are not constituted improper limitations of the present invention for explaining the present invention.In the accompanying drawings：

Fig. 1 is the packet-based core networks that evolution is accessed according to the 3GPP and non-3 GPP access system of the relevant technologies（EPC）Knot Structure schematic diagram；

Fig. 2 is the schematic diagram according to the ANDSF frameworks of the relevant technologies；

Fig. 3 is the method flow diagram of according to embodiments of the present invention one selection V-ANDSF；

Fig. 4 is according to the flow chart that the H-ANDSF of the preferred embodiment of the present invention 1 is UE selections V-ANDSF；

Fig. 5 is the structure diagram of the device of the according to embodiments of the present invention one selection V-ANDSF positioned at UE；

Fig. 6 is the structure diagram of the device of the according to embodiments of the present invention one selection V-ANDSF for being preferably placed at UE；

Fig. 7 is the structure diagram of the device of the according to embodiments of the present invention one selection V-ANDSF positioned at H-ANDSF；

Fig. 8 is the structural frames of the device of the according to embodiments of the present invention one selection V-ANDSF for being preferably placed at H-ANDSF Figure；

Fig. 9 is the cut-in method flow chart of according to embodiments of the present invention two access net；

Figure 10 is indicated when providing strategy and/or access network information according to the ANDSF of the preferred embodiment of the present invention 2 for UE PLMN selects the flow chart of priority；

Figure 11 is the newly-increased I-WLAN of mobility strategy between the ANDSF management object systems according to the preferred embodiment of the present invention 2 The schematic diagram of management strategy；

Figure 12 is to manage object access network discovery information according to the ANDSF of the preferred embodiment of the present invention 2 to increase showing for PLMN newly It is intended to；

Figure 13 is indicated when providing strategy and/or access network information according to the ANDSF of the preferred embodiment of the present invention 3 for UE PLMN selects the flow chart of priority；

Figure 14 is the newly-increased domains PLMN of mobility strategy between the ANDSF management object systems according to the preferred embodiment of the present invention 3 Schematic diagram；

Figure 15 is the structure diagram of the access device of the according to embodiments of the present invention two access net positioned at UE；

Figure 16 is the structure diagram of the access device of the according to embodiments of the present invention two access net positioned at ANDSF.

Specific implementation mode

Come that the present invention will be described in detail below with reference to attached drawing and in conjunction with the embodiments.It should be noted that not conflicting In the case of, the features in the embodiments and the embodiments of the present application can be combined with each other.

Fig. 3 is the method flow diagram of according to embodiments of the present invention one selection access net, and this method is applied to user equipment （UE）It is linked into 3GPP access nets and WLAN simultaneously（WLAN）Scene（Wherein, 3GPP accesses net and WLAN difference portion Different V-ANDSF is affixed one's name to）, as shown in figure 3, this method mainly includes the following steps that（Step S302- steps S304）：

Step S302, user equipment（UE）To ownership place access network discovery and selection function（H-ANDSF）Send access net It was found that and selection function（ANDSF）Network element select request message, wherein ANDSF network elements selection request message include：3GPP is accessed The public land mobile network of net（PLMN）Identify 1, the access technology parameter 1 of 3GPP, the PLMN of WLAN identifies connecing for 2 and WLAN Enter technical parameter 2；

Step S304, after H-ANDSF selects request message to select V-ANDSF for UE according to ANDSF network elements, UE is received The ANDSF network element Response to selection message that H-ANDSF is sent, wherein carry selectable V- in ANDSF network element Response to selection message The V-ANDSF parameters of ANDSF.

In the present embodiment one, during H-ANDSF is that UE selects V-ANDSF, H-ANDSF can be according to successively suitable Sequence selects the V-ANDSF in the domain V-ANDSF, WLAN in 3GPP access network domain successively；Before step S302, this method is also wrapped It includes：UE determines that 3GPP access nets and WLAN are respectively connected to different PLMN.

Preferably, in the present embodiment one, V-ANDSF parameters may include following one：The visited place of V-ANDSF is accessed Net is found and the IP address of selection function server name V-ANDSF-SN, V-ANDSF.

In the present embodiment one, after step S304, UE can also be according to V-ANDSF parameters to the V-ANDSF of selection Access network information request message is sent, including：When V-ANDSF parameters be V-ANDSF-SN when, UE using V-ANDSF-SN into Mobile state Host Configuration Protocol（DHCP）Inquiry or domain name system（DNS）Inquiry obtains the address of V-ANDSF；UE is according to V- The address of ANDSF sends access network information request message to V-ANDSF.

It is carried out with reference to the method that Fig. 4 and preferred embodiment 1 net the selection access that embodiment one provides further Explanation.

Preferred embodiment 1

Fig. 4 is according to the flow chart that the H-ANDSF of the preferred embodiment of the present invention 1 is UE selections ANDSF, as shown in figure 4, should Method mainly includes the following steps that（Step S402- steps S414）：

Step S402, UE are linked into 3GPP and WLAN simultaneously, and to judge that 3GPP accesses and WLAN are linked into different by UE PLMN；

Step S404, UE are found that H-ANDSF.

Step S406, UE are inquired using DHCP or DNS query process obtains the addresses H-ANDSF.In the present invention, UE is to H- ANDSF sends newly-increased ANDSF network elements and selects request message, includes the PLMN marks 1 where 3GPP accesses in message（PLMN ID1）, 3GPP access this access technology, WLAN access where PLMN ID2, WLAN access the message such as this access technology ginseng Number.

Step S408, in the preferred embodiment, H-ANDSF are that the VPLMN1 where UE selects 3GPP accesses is disposed as possible V-ANDSF1.

Alternatively, optionally, H-ANDSF can also forbid UE to select V-ANDSF, and only use H-ANDSF, this is existing skill Art repeats no more.

Step S410, in the preferred embodiment, H-ANDSF send newly-increased ANDSF network element Response to selection message to UE, Include the visited place access network discovery and selection function server name that H-ANDSF is UE selections in message（Visited Access Network Discovery and Selection Function Server Name, referred to as V-ANDSF-SN） Equal message parameters.

Optionally, the ANDSF network element Response to selection message that H-ANDSF is sent to UE can directly include H- in message ANDSF is the IP address of the V-ANDSF of UE selections.

Optionally, include ownership place access network discovery and choosing in message if H-ANDSF forbids UE to select V-ANDSF Select function server title（HomeAccess Network Discovery and Selection Function Server Name, referred to as H-ANDSF-SN）Or the IP address of H-ANDSF, this is the prior art, is repeated no more.

Step S412, if that returned in step S410 is V-ANDSF-SN, UE is inquired using DHCP or DNS query mistake Journey obtains the addresses V-ANDSF, and sends access network information request message to V-ANDSF.

Optionally, if what is returned in step S410 is the IP address of V-ANDSF, UE directly sends to V-ANDSF and accesses Network information request message.

Optionally, if what is returned in step S410 is the IP address of H-ANDSF-SN or H-ANDSF, UE is to H- ANDSF sends access network information request message.

Step S414, V-ANDSF send access network information response message to UE（This is the prior art, is repeated no more）.

Optionally, if what is returned in step S410 is the IP address of H-ANDSF-SN or H-ANDSF, H-ANDSF to UE sends access network information response message.

Fig. 5 is the structure diagram of the device of the according to embodiments of the present invention one selection V-ANDSF positioned at UE, which answers For user equipment（UE）It is linked into 3GPP access nets and WLAN simultaneously（WLAN）Scene（Wherein, 3GPP accesses net Deploy different V-ANDSF respectively with WLAN）, to realize the method for selecting V-ANDSF of the offer of above-described embodiment one, such as Shown in Fig. 5, the device mainly includes：First sending module 10 and receiving module 20.Wherein, the first sending module 10, for Ownership place access network discovery and selection function（H-ANDSF）Send access network discovery and selection function（ANDSF）Network element selection is asked Seek message, wherein ANDSF network elements selection request message include：The public land mobile network of 3GPP access nets（PLMN）Mark 1, The access technology parameter 1 of 3GPP, the PLMN of WLAN identify the access technology parameter 2 of 2 and WLAN；Receiving module 20, is connected to First sending module 10, for after H-ANDSF selects request message to select V-ANDSF for UE according to ANDSF network elements, receiving The ANDSF network element Response to selection message that H-ANDSF is sent, wherein carry selectable V- in ANDSF network element Response to selection message The V-ANDSF parameters of ANDSF.

Fig. 6 is the structure diagram of the device of the according to embodiments of the present invention one selection V-ANDSF for being preferably placed at UE, is such as schemed Shown in 6, which further includes：Determining module 30 is connect with the first sending module 10, in the first sending module to H- Before ANDSF sends ANDSF network elements selection request message, determine that 3GPP access nets and WLAN are respectively connected to different PLMN.

Preferably, V-ANDSF parameters include following one：The visited place access network discovery and selection function of V-ANDSF takes Business device title（V-ANDSF-SN）, V-ANDSF IP address.

Preferably, which further includes：Second sending module 40, is connected to receiving module 20, for receiving mould After block 20 receives ANDSF network element Response to selection message, access net is sent to the V-ANDSF of selection according to V-ANDSF parameters Network information request message.

Wherein, the second sending module 40 includes：Query unit 42, for when V-ANDSF parameters are V-ANDSF-SN, making DynamicHost is carried out with V-ANDSF-SN, and agreement is set（DHCP）Inquiry or domain name system（DNS query obtains the ground of V-ANDSF Location；Transmission unit 44 is connected to query unit 42, for sending access network information to V-ANDSF according to the address of V-ANDSF Request message.

Fig. 7 is the structure diagram of the device of the according to embodiments of the present invention one selection V-ANDSF positioned at H-ANDSF, should Device is applied to user equipment（UE）It is linked into 3GPP access nets and WLAN simultaneously（WLAN）Scene（Wherein, 3GPP Access net and WLAN deploy different V-ANDSF respectively）, to realize selection V-ANDSF that above-described embodiment one provides Method, as shown in fig. 7, the device mainly includes：Selecting module 10 and sending module 20.Wherein, selecting module 10, for being to use Family equipment（UE）A V-ANDSF is selected from the V-ANDSF in the domains V-ANDSF and WLAN in 3GPP access network domain；It sends Module 20 is connected to selecting module 10, for sending ANDSF network element Response to selection message to UE, wherein ANDSF network elements select The V-ANDSF parameters of selectable V-ANDSF are carried in response message.

Fig. 8 is the structural frames of the device of the according to embodiments of the present invention one selection V-ANDSF for being preferably placed at H-ANDSF Figure, as shown in figure 8, the preferred embodiment can also include：Receiving module 30 is connect with selecting module 10, and UE is come from for receiving ANDSF network elements select request message, wherein ANDSF network elements selection request message include：The public land of 3GPP access nets moves Dynamic net PLMN marks 1, the access technology parameter 1 of 3GPP, WLAN PLMN identify the access technology parameter 2 of 2 and WLAN.

Preferably, V-ANDSF parameters include following one：The visited place access network discovery and selection function of V-ANDSF takes The IP address for device title V-ANDSF-SN, V-ANDSF of being engaged in.

Preferably, selecting module 10 selects 3GPP to connect successively during selecting V-ANDSF for UE according to sequencing Enter the V-ANDSF in the domain V-ANDSF, WLAN in domain.

Fig. 9 is the cut-in method flow chart of according to embodiments of the present invention two access net, and this method is applied to user equipment （UE）It is linked into the scene of 3GPP access net and WLAN WLAN simultaneously（Wherein, 3GPP accesses net and WLAN is disposed respectively Different V-ANDSF）, as shown in figure 9, this method mainly includes the following steps that：

Step S902, UE carry out target access network selection according to inter-system mobility strategy and/or access network discovery information It is determined with switching；Wherein, inter-system mobility strategy includes following one：The WLAN of intercommunication（I-WLAN）It is preferred that accessing Node, public land mobile network（PLMN）Domain leaf；Access network discovery information includes：The domains PLMN leaf.

In the present embodiment, it further includes at least one of that I-WLAN, which selects access node,：I-WLAN selects access node also to wrap Include at least one of：I-WLAN belongs to Public Land Mobile Network（HPLMN）Priority instruction leaf, HPLMN are directly accessed Leaf, I-WLAN EHPLMN display instruction leaf, optimum roaming list node, wherein optimum roaming list node includes： The domains PLMN leaf, PLMN priority leaf, service set identifier（SSID）Leaf and SSID priority leaves.

In the present embodiment, the PLMN in the domains PLMN is the Roaming Partner operation that endorsed roaming agreement with home-operator The PLMN of quotient.

Two offer of above-described embodiment is connect with reference to Figure 10 to Figure 14 and preferred embodiment 2 and preferred embodiment 3 The cut-in method of networking is further described.

Preferred embodiment 2

Firstly the need of explanation, in practical applications, this preferred embodiment can be adapted for UE and fail to obtain I-WLAN The case where management information.

Figure 10 is indicated when providing strategy and/or access network information according to the ANDSF of the preferred embodiment of the present invention 2 for UE PLMN selects the flow chart of priority, and as shown in Figure 10, this method mainly includes the following steps that（Step S1002- steps S1016）：

This management object is extended to inter-system mobility strategy by step S1002, ANDSF：

Extension for the management object, please refers to Fig.1 1 here（Figure 11 is according to the preferred embodiment of the present invention 2 Mobility strategy increases the schematic diagram of I-WLAN management strategies newly between ANDSF management object systems）, as shown in figure 11, between system Under the node of mobility strategy, the WLAN of newly-increased intercommunication preferably accesses（I-WLAN Prioritized Access）Section The preferred access of point, position and the prior art（Prioritized Access）Node is arranged side by side.In the wireless of the newly-increased intercommunication Under the preferred access node of LAN, I-WLAN HPLMN priority is increased newly（I-WLAN HPLMN Priority Indication）Instruction leaf, HPLMN are directly accessed（HPLMN Direct Access）Leaf, I-WLAN EHPLMN are shown Instruction（I-WLANEquivalent HPLMN Presentation Indication）Leaf；In the wireless of the newly-increased intercommunication Under the preferred access node of LAN, optimizing roaming partner list is increased newly（Prioritized Roaming Partner List） Node increases the domains PLMN newly under the newly-increased optimizing roaming partner list node（PLMN Realms）Leaf, PLMN are preferential Grade（PLMN Priority）Leaf, SSID leaves, SSID priority（SSID Priority）Leaf.

Wherein, the I-WLAN HPLMN priority increased newly in the management object, is optional parameters.The value is 0, indicates that UE is answered First attempt the PLMN being registrated successfully to last time（Last Registered PLMN, referred to as Last RPLMN）It goes to register.The value It is 1, indicates that UE should first attempt to go to register to HPLMN.

Wherein, the HPLMN increased newly in the management object is directly accessed, and is optional parameters.The value is 0, indicates deactivation HPLMN It is directly accessed, is suitable for the situation that WLAN supports IEEE802.1x authentication mechanisms.The value is 1, indicates that activation HPLMN directly connects Enter, does not support the situation of IEEE802.1x authentication mechanisms suitable for WLAN.

Wherein, the I-WLAN EHPLMN display instructions increased newly in the management object, are optional parameters.The value is 0, is indicated Any EHPLMN is not shown to UE.The value is 1, indicates only EHPLMN highest to UE display priorities.The value is 2, expression pair UE shows all EHPLMN, and sorts from high to low according to priority.

Wherein, the PLMN that the domains PLMN increased newly in the management object are included is to endorsed roaming association with home-operator The PLMN of the Roaming Partner operator of view.

This management object is extended to access network discovery information by step S1004, ANDSF：

Extension for the management object, please refers to Fig.1 2 here（Figure 12 is according to the preferred embodiment of the present invention 2 ANDSF manages the schematic diagram that object access network discovery information increases PLMN newly）, as shown in figure 12, in the section of access network discovery information Under point, in access web area（Access Network Area）The WLAN location of node（WLAN Location）Under child node, The newly-increased domains PLMN leaf, position and SSID are arranged side by side.

PLMN information included in the domains PLMN is the Roaming Partner operation that endorsed roaming agreement with home-operator The PLMN of quotient.

Step S1006, UE judges the switching initiated to WLAN, and is found that ANDSF.

Step S1008, UE send access network information request message to ANDSF.

Step S1010, ANDSF send access network information response message to UE.

Include inter-system mobility strategy and/or access network discovery information in access network information response message.Between system The optional preferred access informations of carrying I-WLAN of mobility strategy.The preferred access informations of I-WLAN include I-WLAN HPLMN priority Instruction, optional HPLMN are directly accessed, optional I-WLAN EHPLMN displays indicate, optional optimizing roaming partner list （The domains PLMN, PLMN priority, SSID, SSID priority）；Access network discovery information, the optional domains carrying PLMN.

Step S1012, UE store inter-system mobility strategy and/or access net hair in access network information response message Existing information.

If including inter-system mobility strategy in access network information response message, and inter-system mobility strategy includes The I-WLAN HPLMN priority indications of the preferred access informations of I-WLAN, UE store the parameter, which can be used for the automatic of UE Network selection.

If including inter-system mobility strategy in access network information response message, and inter-system mobility strategy includes The HPLMN of the preferred access informations of I-WLAN is directly accessed, and UE stores the parameter, which can be used for the manual network selection of UE and automatic Network selection.When the parameter set, WLAN does not support IEEE802.1x to authenticate, and when UE wishes to be directly accessed by HPLMN, and UE can be with WLAN foundation with HPLMN is directly connected to and establishes tunnel.

If including inter-system mobility strategy in access network information response message, and inter-system mobility strategy includes The I-WLAN EHPLMN display instructions of the preferred access informations of I-WLAN, UE store the parameter, which can be used for the manual choosing of UE Net.When the parameter value is not 0, either only EHPLMN highest to UE display priorities or UE is shown all EHPLMN simultaneously according to priority sorts from high to low.

If including inter-system mobility strategy in access network information response message, and inter-system mobility strategy includes The optimizing roaming partner list of the preferred access informations of I-WLAN, UE store the I-WLAN accesses that the list is controlled to its operator PLMN selectors（Operator Controlled PLMN Selector for I-WLAN access）In file.UE needs The considerations of docking, which networks, carries out priority ranking, increase PLMN priority：First, the optimizing roaming that traversal I-WLAN is preferably accessed SSID in partner list from high to low sorts to SSID according to priority；Secondly, within SSID, continue to traverse I-WLAN It is preferred that the domains PLMN in the optimizing roaming partner list accessed, from high to low sort to PLMN according to priority.The SSID of UE is selected The SSID of SSID highest priorities is preferentially selected, and PLMN selects the domains PLMN of then preferred PLMN highest priorities.

For example, inter-system mobility policing rule 1：The domains PLMN 1 for the optimizing roaming partner list that I-WLAN is preferably accessed, PLMN priority 1, SSID1, SSID priority 1；

Inter-system mobility policing rule 2：The domains PLMN 2, PLMN for the optimizing roaming partner list that I-WLAN is preferably accessed Priority 2, SSID1, SSID priority 1；

Inter-system mobility policing rule 3：The domains PLMN 1, PLMN for the optimizing roaming partner list that I-WLAN is preferably accessed Priority 1, SSID2, SSID priority 2；

Inter-system mobility policing rule 4：The domains PLMN 2, PLMN for the optimizing roaming partner list that I-WLAN is preferably accessed Priority 2, SSID2, SSID priority 2.

So, the sequence of this 4 tactful rule prioritizations is followed successively by from high to low：Rule 1>Rule 2>Rule 3>Rule 4。

According to the rule in above-mentioned example, the sequence of net priority is accessed, is followed successively by from high to low（The domains PLMN 1, SSID1） >（The domains PLMN 2, SSID1）>（The domains PLMN 1, SSID2）>（The domains PLMN 2, SSID2）.

If packet access network discovery information in access network information response message, and access network discovery information would include PLMN Domain must then carry out the PLMN selection courses of I-WLAN, the PLMN for selecting the domains PLMN to be included.

Step S1014, UE carries out target access network selection and switching determines.

Step S1016, UE initiate a switch to the flow of WLAN.

Preferred embodiment 3

Firstly the need of explanation, in practical applications, this preferred embodiment can be adapted for UE and obtain part I-WLAN The case where management information（I-WLAN management informations may be provided solely for PLMN and select relevant information at this time, without providing SSID And its priority）Although while being readily applicable to UE and can obtain whole I-WLAN management informations, ANDSF and I-WLAN plans There is the case where conflict between the two in the SSID priority slightly provided.

Figure 13 is indicated when providing strategy and/or access network information according to the ANDSF of the preferred embodiment of the present invention 3 for UE PLMN selects the flow chart of priority, and as shown in figure 13, this method mainly includes the following steps that（Step S1302- steps S1316）：

This management object is extended to inter-system mobility strategy by step S1302, ANDSF：

Extension for the management object, please refers to Fig.1 4 here（Figure 14 is according to the preferred embodiment of the present invention 3 Mobility strategy increases the schematic diagram in the domains PLMN newly between ANDSF management object systems）, as shown in figure 14, in inter-system mobility plan Under the preferred access child node of node slightly, the domains PLMN are increased newly（PLMN_Realms）Leaf.

Wherein, the PLMN that the domains PLMN increased newly in the management object are included is to endorsed roaming association with home-operator The PLMN of the Roaming Partner operator of view, and be that the access preferably accessed identifies corresponding PLMN.

This management object is extended to access network discovery information by step S1304, ANDSF, such as Fig. 6 in embodiment two It is shown.

Step S1306, UE judges the switching initiated to WLAN, and is found that ANDSF.

Step S1308, UE send access network information request message to ANDSF.

Step S1310, ANDSF send access network information response message to UE.

Include inter-system mobility strategy and/or access network discovery information in access network information response message.Between system The optional domains carrying PLMN of mobility strategy；Access network discovery information, the optional domains carrying PLMN.

Step S1312, UE store inter-system mobility strategy and/or access net hair in access network information response message Existing information.

If including inter-system mobility strategy in access network information response message, and inter-system mobility strategy includes The domains PLMN, the corresponding domains PLMN access net priority highest SSID, the corresponding selection SSID that UE access ANDSF is provided are wrapped The PLMN contained.

If ANDSF manages what the access net priority and I-WLAN management informations according to SSID that object provides provided SSID priority clashes, then ANDSF of being subject to manages the access net priority according to SSID that object provides.

If packet access network discovery information in access network information response message, and access network discovery information would include PLMN Domain must then carry out the PLMN selection courses of I-WLAN, the PLMN for selecting the domains PLMN to be included.

Step S1314, UE carries out target access network selection and switching determines.

Step S1316, UE initiate a switch to the flow of WLAN.

Figure 15 is the structure diagram of the access device of the according to embodiments of the present invention two access net positioned at UE, which answers For user equipment（UE）It is linked into 3GPP access nets and WLAN simultaneously（WLAN）Scene（Wherein, 3GPP accesses net Deploy different V-ANDSF respectively with WLAN）, to realize the cut-in method for accessing net of the offer of above-described embodiment two, such as Shown in Figure 15, the device mainly includes：Processing module 10, for being believed according to inter-system mobility strategy and/or access network discovery Breath carries out target access network selection and switching determines；Wherein, inter-system mobility strategy includes following one：The wireless office of intercommunication Domain net（I-WLAN）It is preferred that access node, public land mobile network（PLMN）Domain leaf；Access network discovery information includes：The domains PLMN Leaf.

Preferably, it further includes at least one of that I-WLAN, which selects access node,：I-WLAN belongs to Public Land Mobile Network （HPLMN）Priority instruction leaf, HPLMN are directly accessed leaf, I-WLAN EHPLMN display instructions leaf, optimizing roaming row Table node, wherein optimum roaming list node includes：The domains PLMN leaf, PLMN priority leaf, service set identifier（SSID） Leaf and SSID priority leaves.

Preferably, the PLMN in the domains PLMN is the Roaming Partner operator that endorsed roaming agreement with home-operator PLMN。

Figure 16 is the structure diagram of the access device of the according to embodiments of the present invention two access net positioned at ANDSF, the dress It sets and is applied to user equipment（UE）It is linked into 3GPP access nets and WLAN simultaneously（WLAN）Scene（Wherein, 3GPP connects It networks and WLAN deploys different V-ANDSF respectively）, to realize the access side for accessing net of the offer of above-described embodiment two Method, as shown in figure 16, the device mainly includes：Indicating module 10 is used to indicate UE according to inter-system mobility strategy and/or connects It networks and finds that information carries out target access network selection and switching determines；Wherein, inter-system mobility strategy includes following one：Mutually Logical WLAN（I-WLAN）It is preferred that access node, public land mobile network（PLMN）Domain leaf；Access network discovery information Including：The domains PLMN leaf.

Preferably, it further includes at least one of that I-WLAN, which selects access node,：I-WLAN belongs to Public Land Mobile Network HPLMN prioritys instruction leaf, HPLMN are directly accessed leaf, I-WLAN EHPLMN display instructions leaf, optimum roaming list Node, wherein optimum roaming list node includes：The domains PLMN leaf, PLMN priority leaf, service set identifier（SSID）Leaf Son and SSID priority leaves.

Using above-described embodiment provide selection access net method and selection access net device, using H-ANDSF to UE sends the address of oneself or the address for its selected V-ANDSF, and UE is enable to initiate access network letter according to these addresses The mode of request message is ceased, or first existing inter-system mobility strategy and/or access network discovery information are carried out by ANDSF Extension, then after the access network information request message for receiving UE to UE return access network information response message so that UE at Work(selection access net, can make UE realize the selection of best access net so that UE can choose suitable access network selection plan Slightly.

It can be seen from the above description that the present invention realizes following technique effect：It is sent to UE using H-ANDSF The address of oneself or address for its selected V-ANDSF enable UE to initiate access network information request according to these addresses The mode of message, or first existing inter-system mobility strategy and/or access network discovery information are extended by ANDSF, Access network information response message is returned so that UE is successfully selected to UE after the access network information request message for receiving UE again Access net is selected, solves the problems, such as the selection for the access net for not yet supporting the UE of 2.0 technology of hot spot to cannot achieve roaming carrier, The strategy for being diverted to its roaming carrier can be provided to UE by having reached operator in turn so that and UE can flexibly select access net, Ensure the effect of the success rate and using effect of access.

Obviously, those skilled in the art should be understood that each module of the above invention or each step can be with general Computing device realize that they can be concentrated on a single computing device, or be distributed in multiple computing devices and formed Network on, optionally, they can be realized with the program code that computing device can perform, it is thus possible to which they are stored It is performed by computing device in the storage device, and in some cases, it can be with different from shown in sequence execution herein The step of going out or describing, either they are fabricated to each integrated circuit modules or by them multiple modules or Step is fabricated to single integrated circuit module to realize.In this way, the present invention is not limited to any specific hardware and softwares to combine.

The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.

Claims (13)

1. a kind of method of selection V-ANDSF, 3GPP access nets and WLAN are linked into applied to user equipment (UE) simultaneously The scene of WLAN, wherein the 3GPP access nets and the WLAN deploy different visited place access network discoveries and choosing respectively Select function V-ANDSF, which is characterized in that including：

User equipment (UE) sends access network discovery and selection function to ownership place access network discovery and selection function H-ANDSF ANDSF network elements select request message, wherein ANDSF network elements selection request message includes：The 3GPP accesses are netted public Land mobile PLMN identifies 1, the access technology parameter 1 of the 3GPP, the PLMN of the WLAN identifies the 2 and WLAN's Access technology parameter 2；

After the H-ANDSF selects request message to select V-ANDSF for the UE according to the ANDSF network elements, the UE Receive the ANDSF network element Response to selection message that the H-ANDSF is sent, wherein taken in the ANDSF network elements Response to selection message V-ANDSF parameters with the selected V-ANDSF.

2. according to the method described in claim 1, it is characterized in that,

During the H-ANDSF is that the UE selects V-ANDSF, the H-ANDSF is selected successively according to sequencing The V-ANDSF in V-ANDSF, the domains WLAN in the 3GPP access network domain；

In user equipment (UE) access network discovery and selection function are sent to ownership place access network discovery and selection function H-ANDSF Before ANDSF network elements select request message, the method further includes：The UE determines the 3GPP access nets and the WLAN points It is not linked into different PLMN.

3. method according to claim 1 or 2, which is characterized in that the V-ANDSF parameters include following one：

The visited place access network discovery and selection function server name V-ANDSF-SN of the V-ANDSF, the V-ANDSF IP address.

4. according to the method described in claim 3, it is characterized in that, receiving the ANDSF nets that the H-ANDSF is sent in the UE After first Response to selection message, the method further includes：

The UE sends access network information request message, packet according to the V-ANDSF parameters to the selected V-ANDSF It includes：

When the V-ANDSF parameters are the V-ANDSF-SN, the UE carries out DynamicHost using the V-ANDSF-SN Protocol DHCP inquiry is set or domain name system DNS inquires to obtain the address of the V-ANDSF；

The UE sends the access network information request message according to the address of the V-ANDSF to the V-ANDSF.

5. a kind of device of selection V-ANDSF, is located at user equipment (UE), it is linked into 3GPP access nets and wireless simultaneously applied to UE The scene of LAN WLAN, wherein the 3GPP access nets and the WLAN deploy different visited place access net hairs respectively Now with selection function V-ANDSF, which is characterized in that including：

First sending module, for sending access network discovery and selection to ownership place access network discovery and selection function H-ANDSF Function ANDSF network elements select request message, wherein ANDSF network elements selection request message includes：The 3GPP accesses net Public land mobile network PLMN mark 1, the access technology parameter 1 of the 3GPP, the PLMN marks 2 of the WLAN and described The access technology parameter 2 of WLAN；

Receiving module, for selecting request message to select V- for the UE according to the ANDSF network elements in the H-ANDSF After ANDSF, the ANDSF network element Response to selection message that the H-ANDSF is sent is received, wherein the ANDSF network elements Response to selection The V-ANDSF parameters of the selected V-ANDSF are carried in message.

6. device according to claim 5, which is characterized in that described device further includes：

Determining module selects request message for sending the ANDSF network elements to the H-ANDSF in first sending module Before, determine that the 3GPP access nets and the WLAN are respectively connected to different PLMN.

7. device according to claim 5 or 6, which is characterized in that the V-ANDSF parameters include following one：

The visited place access network discovery and selection function server name V-ANDSF-SN of the V-ANDSF, the V-ANDSF IP address.

8. device according to claim 7, which is characterized in that described device further includes：

Second sending module, after receiving the ANDSF network elements Response to selection message in the receiving module, according to institute It states V-ANDSF parameters and sends access network information request message to the selected V-ANDSF.

9. device according to claim 8, which is characterized in that second sending module includes：

Query unit, for when the V-ANDSF parameters are the V-ANDSF-SN, using the V-ANDSF-SN into action State Host Configuration Protocol DHCP inquiries or domain name system DNS inquire to obtain the address of the V-ANDSF；

Transmission unit disappears for sending the access network information request to the V-ANDSF according to the address of the V-ANDSF Breath.

10. a kind of device of selection V-ANDSF, is located at ownership place access network discovery and selection function H-ANDSF, is applied to user Equipment UE is linked into the scene of 3GPP access net and WLAN WLAN simultaneously, wherein 3GPP access net and described WLAN deploys different visited place access network discoveries and selection function V-ANDSF respectively, which is characterized in that including：

Selecting module, for being V- of the user equipment (UE) in the V-ANDSF and the domains WLAN out of described 3GPP access network domain A V-ANDSF is selected in ANDSF；

Sending module, for sending ANDSF network element Response to selection message to the UE, wherein the ANDSF network elements Response to selection The V-ANDSF parameters of the selected V-ANDSF are carried in message.

11. device according to claim 10, which is characterized in that described device further includes：

Receiving module, for receiving the ANDSF network elements selection request message from the UE, wherein the ANDSF network elements selection Request message includes：The public land mobile network PLMN marks 1 of 3GPP access net, the access technology parameter 1 of the 3GPP, The PLMN of the WLAN identifies the access technology parameter 2 of the 2 and WLAN.

12. the device according to claim 10 or 11, which is characterized in that the V-ANDSF parameters include following one：

The visited place access network discovery and selection function server name V-ANDSF-SN of the V-ANDSF, the V-ANDSF IP address.

13. device according to claim 12, which is characterized in that the selecting module is selecting V-ANDSF for the UE During, select the V-ANDSF in the 3GPP access network domain, the V- in the domains WLAN successively according to sequencing ANDSF。