CN103945493A - V-ANDSF selection method and device, access network access method and device - Google Patents

Abstract

The invention discloses a V-ANDSF selection method and device, an access network access method and device. The methods and the devices are applied to the situation that a UE accesses a 3GPP access network and WLAN at the same time, wherein different V-ANDSFs are respectively deployed. The method comprises the steps that the UE sends an ANDSF network element selection request message carrying a 3GPP access network PLMN identifier, a 3GPP access technology parameter, a WLAN PLMN identifier and a WLAN access technology parameter to an H-ANDSF; the UE receives an ANDSF network element selection response message sent by the H-ANDSF, wherein the ANDSF network element selection response message carries a V-ANDSF parameter selected for the UE. According to the invention, an operator can provide a policy shunted to a roaming operator for the UE, so that the UE can flexibly select an access network, and the access success ratio and the use effect are ensured.

Description

Select V-ANDSF method and device, Access Network cut-in method and device

Technical field

The present invention relates to the communications field, select V-ANDSF method and device, Access Network cut-in method and device in particular to one.

Background technology

In order to keep the competitiveness of 3-G (Generation Three mobile communication system) in the communications field, for user provides, speed is faster, the lower and more personalized Mobile Communication Service of time delay, simultaneously, reduce the operation cost of operator, third generation partner program (3rdGeneration Partnership Project, referred to as 3GPP) standard operation group is just being devoted to the research of evolved packet system (EvolvedPacket System, referred to as EPS).Whole EPS system is divided into wireless access network and core net two parts.Wireless access network is divided into 3GPP Access Network and non-3 GPP access network.

Wireless access network, by evolution base station (EvolvedNodeB, referred to as eNB) and 3G radio network controller (Radio Network Controller, referred to as RNC) composition, it is the transmitting-receiving of responsible wireless signal mainly, by air interface and terminal contact, Radio Resource, scheduling of resource and the access control of management air interface.

In core net, comprise home subscriber server (Home Subscriber Server, referred to as HSS), 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 that as shown in Figure 1, EPS system is supported 3GPP access according to the structural representation of the packet-based core networks (EPC) of the 3GPP of correlation technique and non-3GPP connecting system access evolution.Wherein, HSS is the permanent storage place of user contracting data, is positioned at the signing ownership place of user; MME is responsible for the chain of command correlation function such as the processing of mobile management, Non-Access Stratum signaling and the management of user mobility managing context; S-GW is the accessing gateway equipment being connected with 3GPP Access Network, forwarding data between 3GPP access and P-GW, and data are carried out to buffer memory; P-GW is the borde gateway of EPS and packet data network (Packet Data Network, referred to as PDN), is responsible for the access of PDN and the function such as forwarding data between EPS and PDN; PCRF is "Policy and Charging Rules Function entity, and it is connected with Operator Specific Service network by receiving interface Rx, is responsible for providing charging control, online credit control, thresholding control and service quality (Quality ofService, referred to as QoS); SGSN is the service support node of GEARN and UTRAN user access core network network, similar with Mobility Management Entity in function, the functions such as responsible user's position renewal, paging management and bearer management.

As shown in Figure 1, EPS system is also supported non-3GPP access.Wherein, by S2a/S2b/S2c Interface realization, P-GW is as the anchor point between 3GPP and non-3GPP access with the intercommunication of non-3GPP access, and non-3GPP access is divided into the non-3GPP access of credit and the non-3GPP access of non-credit.Wherein, the non-3GPP access of credit can directly be connected with P-GW by S2a interface, and S2a interface adopts proxy-mobile IP (Proxy Mobile IP, referred to as PMIP) agreement to carry out information interaction.The non-3GPP access of non-credit needs to be connected with P-GW through the packet data gateway (Evolved Packet Data Gateway, referred to as ePDG) of evolution, and the interface between ePDG and P-GW is S2b.S2c interface provides subscriber equipment (User Equipment, referred to as UE) and P-GW between the control of user's face and mobility support, the mobility protocol of its support is the mobile IP v 6 (Mobile IPv6support for Dual Stack Hosts and Routers, referred to as DSMIPv6) of supporting two stacks.

The fast development of intelligent terminal and mobile Internet application, increases sharply Mobile data flow with speed difficult to the appraisal.In order effectively to alleviate flow pressure, the lasting development that promotes mobile communication business, WLAN (wireless local area network) (Wireless LocalArea Network selects to greatly develop in the increasing operator in the whole world, referred to as WLAN), and to adopt the WLAN of low cost, high bandwidth be Cellular Networks shunting.

Access network discovery and selection function (Access Network Discovery and Selection Function, referred to as ANDSF) as access anchor point, can realize Intelligent network-selecting, mutual by network and terminal, realize effective shunting of network insertion, the operator that meets following multi-network cooperative to.ANDSF generates strategy, and helps terminal use to select the network formats of best access, realizes the collaborative of plurality of access modes.

In prior art, ANDSF proposes in R8 version.In the time that UE will select network to register, if there is 3GPP Access Network and non-3 GPP access network simultaneously, EPS can be current according to UE positional information, provide available access network discovery information by ANDSF to UE, or (the Inter-System Mobility Policy of mobility strategy between system, referred to as ISMP), the information that UE uses ANDSF to provide, selects suitable Access Network to register.If there are multiple non-3 GPP access networks simultaneously, EPS can be current according to UE positional information, provide routing policy between system (Inter-System Routing Policy, referred to as ISRP) by ANDSF to UE, the information that UE uses ANDSF to provide, selects suitable Access Network to shunt.

Fig. 2 is according to the schematic diagram of the ANDSF framework of correlation technique, as shown in Figure 2, ownership place access network discovery and selection function (Home Access Network Discovery and Selection Function, referred to as H-ANDSF) and visited place access network discovery and selection function (VisitedAccess Network Discovery and Selection Function, referred to as V-ANDSF) be connected with UE by S14 interface, this interface adopts open mobile alliance device management (Open Mobile Alliance DeviceManagement, referred to as OMADM) agreement.

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

WLAN technology is also in sustainable development, focus 2.0(Hotspot2.0, referred to as HS2.0) be also referred to as focus of future generation (Next Generation Hotspot, referred to as NGH), pushed and the external network information of its intercommunication to UE by AP by Advertisement Server (Advertisement Server), for WLAN user provides the ability of seamless roam, seamless authentication, WLAN user possessed approach Cellular Networks user's experience and impression.

ANDSF can static configuration focus 2.0 Access Networks characteristic information, the characteristic information of focus 2.0 Access Networks transmits on the S14 interface shown in Fig. 2.

But there is following defect in prior art:

1, when UE accesses 3GPP and WLAN simultaneously, and 3GPP and WLAN are linked into different visited place Public Land Mobile Nerwork (Visited Public Land Mobile Network, referred to as VPLMN) time, the operator of each VPLMN may dispose a V-ANDSF, and the strategy of different V-ANDSF may exist conflict, UE should select the strategy of ANDSF of which VPLMN not yet clear and definite.

2, in special time period and specific region, such as in intown peak period, operator may wish communication flows to be diverted to its roaming partner, and this roaming partner may be the operator of focus 2.0 Access Networks, may be also the operator of non-focus 2.0 Access Networks.Effective coverage (Validity Area) and effective time (Time ofDay) are provided in ANDSF strategy, can solve the problem that be diverted to the operator of other access technologies intown peak period, but still need to consider to be diverted in this case other roamings partner's problem.For roaming, partner is the scene of the operator of focus 2.0 Access Networks, can solve by the organization identification symbol (Organization Identifiers, referred to as OIs) and territory (Realms) of prior art.But the scene that belongs to the operator of non-focus 2.0 Access Networks for roaming partner, there is no solution.

(1) according to prior art, at the WLAN (wireless local area network) (Interworking-WLAN of intercommunication, referred to as I-WLAN) implemented Public Land Mobile Nerwork (Public Land Mobile Network, referred to as PLMN) select and selected PLMN after, can carry out ANDSF process, and the strategy that ANDSF provides not yet comprises the relevant information of PLMN selection priority.Like this, even if operator has comprised the service set identifier (Service Set ID, referred to as SSID) of roaming partner operator in ANDSF strategy, UE also cannot reselect another different PLMN and then cannot select to belong to the SSID of this PLMN.

(2), for the UE that not yet supports focus 2.0 technology, in the time realizing 3GPP and WLAN intercommunication, need to use I-WLAN technology.But operator may decision-making not provide I-WLAN management object (I-WLAN Management Object, referred to as I-WLAN MO) to UE.Or although operator provides I-WLAN MO to UE, information is incomplete, or do not provide the relevant information of any WLAN.So, UE also cannot reselect the SSID that another different PLMN and then selection belong to this PLMN.

(3) for the UE that not yet supports focus 2.0 technology, if the strategy that ANDSF provides to UE show, in special time period and specific region, SSID1 priority is high, and in other periods or other regions, just selects SSID2.But according to I-WLAN process, the PLMN priority list in UE, but shows that SSID2 priority is higher than SSID1.But UE How to choose SSID is not yet clear and definite in the situation that of this policy conflict.

Hence one can see that, and prior art, owing to there is above-mentioned various technological deficiency, must cause not yet supporting that the UE of focus 2.0 technology cannot realize the selection of the Access Network of roaming operator.

Cannot realize the problem of the selection of the Access Network of roaming for the UE that not yet supports focus 2.0 technology in correlation technique, not yet propose at present effective solution.

Summary of the invention

The invention provides cut-in method and the device of the method for V-ANDSF of selection a kind of and device, Access Network, at least to address the above problem.

According to an aspect of the present invention, the method of V-ANDSF of selection a kind of is provided, be applied to the scene that subscriber equipment (UE) is linked into 3GPP Access Network and wireless lan (wlan) simultaneously, wherein, 3GPP Access Network and WLAN have disposed respectively different visited place access network discoveries and selection function (V-ANDSF), comprise: subscriber equipment (UE) is to ownership place access network discovery and selection function (H-ANDSF) sends access network discovery and selection function (ANDSF) network element is selected request message, wherein, ANDSF network element selects request message to comprise: Public Land Mobile Nerwork (PLMN) mark 1 of 3GPP Access Network, the access technology parameter 1 of 3GPP, the PLMN mark 2 of WLAN and the access technology parameter 2 of WLAN, selecting request message at H-ANDSF according to ANDSF network element is that UE selects after V-ANDSF, and UE receives the ANDSF network element selection response message that H-ANDSF sends, and wherein, ANDSF network element is selected the V-ANDSF parameter of carrying selectable V-ANDSF in response message.

Preferably, be that UE selects in the process of V-ANDSF at H-ANDSF, H-ANDSF selects the V-ANDSF in V-ANDSF, the WLAN territory in 3GPP Access Network territory successively according to sequencing; Send to ownership place access network discovery and selection function (H-ANDSF) at subscriber equipment (UE) before access network discovery and selection function (ANDSF) network element select request message, the method also comprises: UE determines that 3GPP Access Network and WLAN are linked into respectively different PLMN.

Preferably, it is one of following that V-ANDSF parameter comprises: the IP address of the visited place access network discovery of V-ANDSF and selection function server name (Visited Access Network Discovery and Selection Function Server Name, referred to as V-ANDSF-SN), V-ANDSF.

Preferably, after UE receives the ANDSF network element selection response message of H-ANDSF transmission, the method also comprises: UE sends access network information request message (Access Network Information Request) according to V-ANDSF parameter to the V-ANDSF selecting, comprise: in the time that V-ANDSF parameter is V-ANDSF-SN, UE uses V-ANDSF-SN to carry out DynamicHost agreement (Dynamic Host Configuration Protocol is set, referred to as DHCP) inquiry or domain name system (Domain Name System, referred to as DNS) inquiry obtains the address of V-ANDSF, UE sends access network information request message according to the address of V-ANDSF to V-ANDSF.

According to another aspect of the present invention, the device of a kind of V-ANDSF of selection is provided, be positioned at subscriber equipment (UE), be applied to the scene that UE is linked into 3GPP Access Network and wireless lan (wlan) simultaneously, wherein, 3GPP Access Network and WLAN have disposed respectively different visited place access network discoveries and selection function (V-ANDSF), comprise: the first sending module, for sending access network discovery and selection function (ANDSF) network element selection request message to ownership place access network discovery and selection function (H-ANDSF), wherein, ANDSF network element selects request message to comprise: Public Land Mobile Nerwork (PLMN) mark 1 of 3GPP Access Network, the access technology parameter 1 of 3GPP, the PLMN mark 2 of WLAN and the access technology parameter 2 of WLAN, receiver module, be that UE selects after V-ANDSF for selecting request message at H-ANDSF according to ANDSF network element, receive the ANDSF network element selection response message that H-ANDSF sends, wherein, ANDSF network element is selected the V-ANDSF parameter of carrying selectable V-ANDSF in response message.

Preferably, this device also comprises: determination module, before sending ANDSF network element selection request message to H-ANDSF at the first sending module, determine that 3GPP Access Network and WLAN are linked into respectively different PLMN.

Preferably, V-ANDSF parameter comprises one of following: the IP address of the visited place access network discovery of V-ANDSF and selection function server name V-ANDSF-SN, V-ANDSF.

Preferably, this device also comprises: the second sending module, for receive ANDSF network element selection response message at receiver module after, sends access network information request message according to V-ANDSF parameter to the V-ANDSF selecting.

Preferably, the second sending module comprises: query unit, in the time that V-ANDSF parameter is V-ANDSF-SN, is used V-ANDSF-SN to carry out DynamicHost agreement (DHCP) inquiry or domain name system (DNS) inquiry are set obtain the address of V-ANDSF; Transmitting element, for sending access network information request message according to the address of V-ANDSF to V-ANDSF.

According to a further aspect of the invention, the device of a kind of V-ANDSF of selection is provided, be positioned at ownership place access network discovery and selection function (H-ANDSF), be applied to the scene that subscriber equipment (UE) is linked into 3GPP Access Network and wireless lan (wlan) simultaneously, wherein, 3GPP Access Network and WLAN have disposed respectively different visited place access network discoveries and selection function (V-ANDSF), comprise: select module, be used to the V-ANDSF in V-ANDSF and the WLAN territory of subscriber equipment (UE) in 3GPP Access Network territory and select a V-ANDSF; Sending module, selects response message for sending ANDSF network element to UE, and wherein, ANDSF network element is selected the V-ANDSF parameter of carrying selectable V-ANDSF in response message.

Preferably, this device also comprises: receiver module, select request message for receiving from the ANDSF network element of UE, wherein, ANDSF network element selects request message to comprise: Public Land Mobile Nerwork (PLMN) mark 1 of 3GPP Access Network, the access technology parameter 1 of 3GPP, the PLMN mark 2 of WLAN and the access technology parameter 2 of WLAN.

Preferably, V-ANDSF parameter comprises one of following: the IP address of the visited place access network discovery of V-ANDSF and selection function server name V-ANDSF-SN, V-ANDSF.

Preferably, select module in the process for UE selection V-ANDSF, select successively the V-ANDSF in V-ANDSF, the WLAN territory in 3GPP Access Network territory according to sequencing.

According to a further aspect of the invention, a kind of cut-in method of Access Network is provided, be applied to the scene that subscriber equipment (UE) is linked into 3GPP Access Network and wireless lan (wlan) simultaneously, wherein, 3GPP Access Network and WLAN have disposed respectively different visited place access network discoveries and selection function (V-ANDSF), comprising: UE carries out target access network selection and switch determining according to mobility strategy between system and/or access network discovery information; Wherein, between system, mobility strategy comprises one of following: the WLAN (wireless local area network) (I-WLAN) of intercommunication is access node, Public Land Mobile Nerwork (PLMN) territory leaf preferably; Access network discovery information comprises: PLMN territory leaf.

Preferably, I-WLAN select access node also comprise following one of at least: I-WLAN ownership place Public Land Mobile Nerwork (Home Public Land Mobile Network, referred to as HPLMN) priority instruction leaf, HPLMN directly accesses leaf, I-WLAN equity ownership place Public Land Mobile Nerwork (Equivalent Home Public Land Mobile Network, referred to as EHPLMN) show and indicate leaf, optimum roaming list node, wherein, optimum roaming list node comprises: PLMN territory leaf, PLMN priority leaf, service set identifier (Service Set Identifier, referred to as SSID) leaf and SSID priority leaf.

Preferably, the PLMN in PLMN territory is the PLMN that has signed the roaming partner operator of roaming agreement with home-operator.

According to a further aspect of the invention, a kind of access device of Access Network is provided, be positioned at subscriber equipment (UE), be applied to the scene that UE is linked into 3GPP Access Network and wireless lan (wlan) simultaneously, wherein, 3GPP Access Network and WLAN have disposed respectively different visited place access network discoveries and selection function (V-ANDSF), comprising: processing module, for carrying out target access network selection and switch determining according to mobility strategy between system and/or access network discovery information; Wherein, between system, mobility strategy comprises one of following: the WLAN (wireless local area network) (I-WLAN) of intercommunication is access node, Public Land Mobile Nerwork (PLMN) territory leaf preferably; Access network discovery information comprises: PLMN territory leaf.

Preferably, I-WLAN select access node also comprise following one of at least: I-WLAN ownership place Public Land Mobile Nerwork (HPLMN) priority instruction leaf, HPLMN directly access leaf, I-WLAN EHPLMN shows instruction leaf, optimum roaming list node, wherein, optimum roaming list node comprises: PLMN territory leaf, PLMN priority leaf, service set identifier (SSID) leaf and SSID priority leaf.

Preferably, the PLMN in PLMN territory is the PLMN that has signed the roaming partner operator of roaming agreement with home-operator.

According to an also aspect of the present invention, a kind of access device of Access Network is provided, be positioned at access network discovery and selection function (ANDSF), be applied to the scene that subscriber equipment (UE) is linked into 3GPP Access Network and wireless lan (wlan) simultaneously, wherein, 3GPP Access Network and WLAN have disposed respectively different visited place access network discoveries and selection function (V-ANDSF), comprise: indicating module, is used to indicate UE and carries out target access network selection and switch determining according to mobility strategy between system and/or access network discovery information; Wherein, between system, mobility strategy comprises one of following: the WLAN (wireless local area network) (I-WLAN) of intercommunication is access node, Public Land Mobile Nerwork (PLMN) territory leaf preferably; Access network discovery information comprises: PLMN territory leaf.

Preferably, I-WLAN select access node also comprise following one of at least: I-WLAN ownership place Public Land Mobile Nerwork HPLMN priority instruction leaf, HPLMN directly access leaf, I-WLAN EHPLMN shows instruction leaf, optimum roaming list node, wherein, optimum roaming list node comprises: PLMN territory leaf, PLMN priority leaf, service set identifier (SSID) leaf and SSID priority leaf.

By the present invention, adopt H-ANDSF to be sent as the address of its selected V-ANDSF to UE, make UE can initiate according to these addresses the mode of access network information request message, or first by ANDSF, mobility strategy between existing system and/or access network discovery information are expanded, return to access network information response message so that UE successfully selects Access Network to UE receiving after the access network information request message of UE again, solve the problem of not yet supporting the UE of focus 2.0 technology cannot realize the selection of the Access Network of roaming operator, thereby having reached operator can provide the strategy that is diverted to its roaming operator to UE, make UE can select flexibly Access Network, ensure the success rate of access and the effect of result of use.

Brief description of the drawings

Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:

Fig. 1 is according to the structural representation of the packet-based core networks (EPC) of the 3GPP of correlation technique and non-3GPP connecting system access evolution;

Fig. 2 is according to the schematic diagram of the ANDSF framework of correlation technique;

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

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

Fig. 5 is according to the structured flowchart of the device of the selection V-ANDSF that is positioned at UE of the embodiment of the present invention one;

Fig. 6 is according to the structured flowchart of the device of the selection V-ANDSF that is preferably placed at UE of the embodiment of the present invention one;

Fig. 7 is according to the structured flowchart of the device of the selection V-ANDSF that is positioned at H-ANDSF of the embodiment of the present invention one;

Fig. 8 is according to the structured flowchart of the device of the selection V-ANDSF that is preferably placed at H-ANDSF of the embodiment of the present invention one;

Fig. 9 is the cut-in method flow chart according to the Access Network of the embodiment of the present invention two;

Figure 10 indicates PLMN to select the flow chart of priority while providing strategy and/or Access Network information according to the ANDSF of the preferred embodiment of the present invention 2 for UE;

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

Figure 12 is according to the schematic diagram of the newly-increased PLMN of the ANDSF management object access network discovery information of the preferred embodiment of the present invention 2;

Figure 13 indicates PLMN to select the flow chart of priority while providing strategy and/or Access Network information according to the ANDSF of the preferred embodiment of the present invention 3 for UE;

Figure 14 is according to the schematic diagram in the newly-increased PLMN of mobility strategy between the ANDSF management object system of the preferred embodiment of the present invention 3 territory;

Figure 15 is according to the structured flowchart of the access device of the Access Network that is positioned at UE of the embodiment of the present invention two;

Figure 16 is according to the structured flowchart of the access device of the Access Network that is positioned at ANDSF of the embodiment of the present invention two.

Embodiment

Hereinafter also describe the present invention in detail with reference to accompanying drawing in conjunction with the embodiments.It should be noted that, in the situation that not conflicting, the feature in embodiment and embodiment in the application can combine mutually.

Fig. 3 is according to the method flow diagram of the selection Access Network of the embodiment of the present invention one, the method is applied to scene that subscriber equipment (UE) is linked into 3GPP Access Network and wireless lan (wlan) simultaneously (wherein, 3GPP Access Network and WLAN have disposed respectively different V-ANDSF), as shown in Figure 3, the method mainly comprises the following steps (step S302-step S304):

Step S302, subscriber equipment (UE) is to ownership place access network discovery and selection function (H-ANDSF) sends access network discovery and selection function (ANDSF) network element is selected request message, wherein, ANDSF network element selects request message to comprise: Public Land Mobile Nerwork (PLMN) mark 1 of 3GPP Access Network, the access technology parameter 1 of 3GPP, the PLMN mark 2 of WLAN and the access technology parameter 2 of WLAN;

Step S304, selecting request message at H-ANDSF according to ANDSF network element is that UE selects after V-ANDSF, UE receives the ANDSF network element selection response message that H-ANDSF sends, and wherein, ANDSF network element is selected the V-ANDSF parameter of carrying selectable V-ANDSF in response message.

In the present embodiment one, be that UE selects in the process of V-ANDSF at H-ANDSF, H-ANDSF can select the V-ANDSF in V-ANDSF, the WLAN territory in 3GPP Access Network territory successively according to sequencing; Before step S302, the method also comprises: UE determines that 3GPP Access Network and WLAN are linked into respectively different PLMN.

Preferably, in the present embodiment one, it is one of following that V-ANDSF parameter can comprise: the IP address of the visited place access network discovery of V-ANDSF and selection function server name V-ANDSF-SN, V-ANDSF.

In the present embodiment one, after step S304, UE can also send access network information request message to the V-ANDSF selecting according to V-ANDSF parameter, comprise: in the time that V-ANDSF parameter is V-ANDSF-SN, UE uses V-ANDSF-SN to carry out DynamicHost agreement (DHCP) inquiry or domain name system (DNS) inquiry are set obtain the address of V-ANDSF; UE sends access network information request message according to the address of V-ANDSF to V-ANDSF.

The method of selection Access Network embodiment mono-being provided below in conjunction with Fig. 4 and preferred embodiment 1 is further detailed.

Preferred embodiment 1

Fig. 4 is to be the flow chart that UE selects ANDSF according to the H-ANDSF of the preferred embodiment of the present invention 1, and as shown in Figure 4, the method mainly comprises the following steps (step S402-step S414):

Step S402, UE is linked into 3GPP and WLAN simultaneously, and UE judges that 3GPP access and WLAN are linked into different PLMN;

Step S404, UE has found H-ANDSF.

Step S406, UE uses DHCP inquiry or DNS query script to obtain H-ANDSF address.In the present invention, UE sends newly-increased ANDSF network element to H-ANDSF and selects request message, comprises the PLMN mark 1(PLMN ID1 at 3GPP access place in message), the 3GPP PLMN ID2, the WLAN that access this access technology, WLAN access place access the message parameters such as this access technology.

Step S408, in this preferred embodiment, the V-ANDSF1 that H-ANDSF selects the VPLMN1 at 3GPP access place to dispose for UE as far as possible.

Or alternatively, H-ANDSF also can forbid that UE selects V-ANDSF, and only uses H-ANDSF, this is prior art, repeats no more.

Step S410, in this preferred embodiment, H-ANDSF sends newly-increased ANDSF network element to UE and selects response message, in message, comprising H-ANDSF is the message parameter such as visited place access network discovery and selection function server name (Visited Access Network Discovery and Selection Function Server Name, referred to as V-ANDSF-SN) that UE selects.

Alternatively, the ANDSF network element that H-ANDSF sends to UE is selected response message, and in message, can directly comprise H-ANDSF is the IP address of the V-ANDSF of UE selection.

Alternatively, if H-ANDSF forbids UE and selects V-ANDSF, in message, comprise ownership place access network discovery and selection function server name (HomeAccess Network Discovery and Selection Function Server Name, referred to as H-ANDSF-SN) or the IP address of H-ANDSF, this is prior art, repeats no more.

Step S412, if that return in step S410 is V-ANDSF-SN, UE uses DHCP inquiry or DNS query script, obtains V-ANDSF address, and sends access network information request message to V-ANDSF.

Alternatively, if what return in step S410 is the IP address of V-ANDSF, UE directly sends access network information request message to V-ANDSF.

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

Step S414, V-ANDSF sends access network information response message (this is prior art, repeats no more) to UE.

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

Fig. 5 is according to the structured flowchart of the device of the selection V-ANDSF that is positioned at UE of the embodiment of the present invention one, the scene that this application of installation is linked into 3GPP Access Network and wireless lan (wlan) in subscriber equipment (UE) simultaneously (wherein, 3GPP Access Network and WLAN have disposed respectively different V-ANDSF), in order to realize the method for the selection V-ANDSF that above-described embodiment one provides, as shown in Figure 5, this device mainly comprises: the first sending module 10 and receiver module 20.Wherein, the first sending module 10, for sending access network discovery and selection function (ANDSF) network element selection request message to ownership place access network discovery and selection function (H-ANDSF), wherein, ANDSF network element selects request message to comprise: Public Land Mobile Nerwork (PLMN) mark 1 of 3GPP Access Network, the access technology parameter 1 of 3GPP, the PLMN mark 2 of WLAN and the access technology parameter 2 of WLAN; Receiver module 20, be connected to the first sending module 10, be that UE selects after V-ANDSF for selecting request message at H-ANDSF according to ANDSF network element, receive the ANDSF network element selection response message that H-ANDSF sends, wherein, ANDSF network element is selected the V-ANDSF parameter of carrying selectable V-ANDSF in response message.

Fig. 6 is according to the structured flowchart of the device of the selection V-ANDSF that is preferably placed at UE of the embodiment of the present invention one, as shown in Figure 6, this preferred embodiment also comprises: determination module 30, be connected with the first sending module 10, before sending ANDSF network element selection request message to H-ANDSF at the first sending module, determine that 3GPP Access Network and WLAN are linked into respectively different PLMN.

Preferably, V-ANDSF parameter comprises one of following: the IP address of the visited place access network discovery of V-ANDSF and selection function server name (V-ANDSF-SN), V-ANDSF.

Preferably, this preferred embodiment also comprises: the second sending module 40, be connected to receiver module 20, for receive ANDSF network element selection response message at receiver module 20 after, send access network information request message according to V-ANDSF parameter to the V-ANDSF selecting.

Wherein, the second sending module 40 comprises: query unit 42, in the time that V-ANDSF parameter is V-ANDSF-SN, is used V-ANDSF-SN to carry out DynamicHost and agreement (DHCP) inquiry or domain name system are set (DNS inquiry obtains the address of V-ANDSF; Transmitting element 44, is connected to query unit 42, for sending access network information request message according to the address of V-ANDSF to V-ANDSF.

Fig. 7 is according to the structured flowchart of the device of the selection V-ANDSF that is positioned at H-ANDSF of the embodiment of the present invention one, the scene that this application of installation is linked into 3GPP Access Network and wireless lan (wlan) in subscriber equipment (UE) simultaneously (wherein, 3GPP Access Network and WLAN have disposed respectively different V-ANDSF), in order to realize the method for the selection V-ANDSF that above-described embodiment one provides, as shown in Figure 7, this device mainly comprises: select module 10 and sending module 20.Wherein, select module 10, be used to the V-ANDSF in V-ANDSF and the WLAN territory of subscriber equipment (UE) in 3GPP Access Network territory and select a V-ANDSF; Sending module 20, is connected to and selects module 10, selects response message for sending ANDSF network element to UE, and wherein, ANDSF network element is selected the V-ANDSF parameter of carrying selectable V-ANDSF in response message.

Fig. 8 is according to the structured flowchart of the device of the selection V-ANDSF that is preferably placed at H-ANDSF of the embodiment of the present invention one, as shown in Figure 8, this preferred embodiment can also comprise: receiver module 30, be connected with selecting module 10, select request message for receiving from the ANDSF network element of UE, wherein, ANDSF network element selects request message to comprise: the Public Land Mobile Nerwork PLMN mark 1 of 3GPP Access Network, the access technology parameter 1 of 3GPP, the PLMN mark 2 of WLAN and the access technology parameter 2 of WLAN.

Preferably, V-ANDSF parameter comprises one of following: the IP address of the visited place access network discovery of V-ANDSF and selection function server name V-ANDSF-SN, V-ANDSF.

Preferably, select module 10 in the process for UE selection V-ANDSF, select successively the V-ANDSF in V-ANDSF, the WLAN territory in 3GPP Access Network territory according to sequencing.

Fig. 9 is the cut-in method flow chart according to the Access Network of the embodiment of the present invention two, the method is applied to scene that subscriber equipment (UE) is linked into 3GPP Access Network and WLAN (wireless local area network) WLAN simultaneously (wherein, 3GPP Access Network and WLAN have disposed respectively different V-ANDSF), as shown in Figure 9, the method mainly comprises the following steps:

Step S902, UE carries out target access network selection and switches determining according to mobility strategy between system and/or access network discovery information; Wherein, between system, mobility strategy comprises one of following: the WLAN (wireless local area network) (I-WLAN) of intercommunication is access node, Public Land Mobile Nerwork (PLMN) territory leaf preferably; Access network discovery information comprises: PLMN territory leaf.

In the present embodiment, I-WLAN select access node also comprise following one of at least: I-WLAN select access node also comprise following one of at least: I-WLAN ownership place Public Land Mobile Nerwork (HPLMN) priority instruction leaf, HPLMN directly access leaf, I-WLAN EHPLMN shows instruction leaf, optimum roaming list node, wherein, optimum roaming list node comprises: PLMN territory leaf, PLMN priority leaf, service set identifier (SSID) leaf and SSID priority leaf.

In the present embodiment, the PLMN in PLMN territory is the PLMN that has signed the roaming partner operator of roaming agreement with home-operator.

The cut-in method of Access Network above-described embodiment two being provided below in conjunction with Figure 10 to Figure 14 and preferred embodiment 2 and preferred embodiment 3 conducts further description.

Preferred embodiment 2

First it should be noted that, in actual applications, this preferred embodiment goes for UE fails to obtain the situation of I-WLAN management information.

Figure 10 indicates PLMN to select the flow chart of priority while providing strategy and/or Access Network information according to the ANDSF of the preferred embodiment of the present invention 2 for UE, as shown in figure 10, the method mainly comprises the following steps (step S1002-step S1016):

Step S1002, ANDSF expands this management object of mobility strategy between system:

For the expansion of this management object, here please refer to Figure 11 (Figure 11 is according to the schematic diagram of the newly-increased I-WLAN management strategy of mobility strategy between the ANDSF management object system of the preferred embodiment of the present invention 2), as shown in figure 11, under the node of mobility strategy between system, the WLAN (wireless local area network) of newly-increased intercommunication preferably accesses (I-WLAN Prioritized Access) node, and preferred access (Prioritized Access) node of position and prior art is arranged side by side.Under the preferred access node of WLAN (wireless local area network) of this newly-increased intercommunication, newly-increased I-WLAN HPLMN priority (I-WLAN HPLMN Priority Indication) instruction leaf, HPLMN directly access (HPLMN Direct Access) leaf, I-WLAN EHPLMN shows instruction (I-WLANEquivalent HPLMN Presentation Indication) leaf; Under the preferred access node of WLAN (wireless local area network) of this newly-increased intercommunication, newly-increased optimizing roaming partner list (Prioritized Roaming Partner List) node, under this newly-increased optimizing roaming partner list node, newly-increased PLMN territory (PLMN Realms) leaf, PLMN priority (PLMN Priority) leaf, SSID leaf, SSID priority (SSID Priority) leaf.

Wherein, newly-increased I-WLAN HPLMN priority in this management object, is optional parameters.This value is 0, represents that UE should first attempt the PLMN(Last Registered PLMN being registrated successfully last time, referred to as Last RPLMN) go to register.This value is 1, represents that UE should first attempt HPLMN and go registration.

Wherein, HPLMN newly-increased in this management object directly accesses, and is optional parameters.This value is 0, represents that deactivation HPLMN directly accesses, and is applicable to the situation of WLAN support IEEE802.1x authentication mechanism.This value is 1, represents to activate HPLMN and directly accesses, and is applicable to WLAN and does not support the situation of IEEE802.1x authentication mechanism.

Wherein, I-WLAN EHPLMN newly-increased in this management object shows instruction, is optional parameters.This value is 0, represents UE not to be shown to any EHPLMN.This value is 1, only represents the highest EHPLMN of UE display priority.This value is 2, represents UE to show all EHPLMN, and sorts from high to low according to priority.

Wherein, the PLMN that in this management object, newly-increased PLMN territory comprises, is the PLMN that has signed the roaming partner operator of roaming agreement with home-operator.

Step S1004, ANDSF expands this management object of access network discovery information:

For the expansion of this management object, here please refer to Figure 12 (Figure 12 is according to the schematic diagram of the newly-increased PLMN of the ANDSF management object access network discovery information of the preferred embodiment of the present invention 2), as shown in figure 12, under the node of access network discovery information, under WLAN position (WLAN Location) child node of Access Network region (Access Network Area) node, newly-increased PLMN territory leaf, position and SSID are arranged side by side.

The PLMN information comprising in this PLMN territory is the PLMN that has signed the roaming partner operator of roaming agreement with home-operator.

Step S1006, the switching of WLAN has been initiated in UE judgement, and has found ANDSF.

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

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

In access network information response message, comprise mobility strategy and/or access network discovery information between system.The optional preferred access information of I-WLAN that carries of mobility strategy between system.The preferred access information of I-WLAN comprises that the instruction of I-WLAN HPLMN priority, optional HPLMN directly access, optional I-WLAN EHPLMN shows instruction, optional optimizing roaming partner list (PLMN territory, PLMN priority, SSID, SSID priority); Access network discovery information, the optional PLMN territory of carrying.

Step S1012, mobility strategy and/or access network discovery information between the system in UE storage access network information response message.

If comprise mobility strategy between system in access network information response message, and the I-WLAN HPLMN priority that between system, mobility strategy comprises the preferred access information of I-WLAN instruction, UE stores this parameter, and this parameter can be used for the automatic network selection of UE.

If comprise mobility strategy between system in access network information response message, and the HPLMN that between system, mobility strategy comprises the preferred access information of I-WLAN directly accesses, and UE stores this parameter, and this parameter can be used for manual network selection and the automatic network selection of UE.When this parameter set, WLAN does not support IEEE802.1x authentication, and UE is while wishing directly to access by HPLMN, and UE can set up and directly be connected and set up tunnel with the WLAN of HPLMN.

If comprise mobility strategy between system in access network information response message, and the I-WLAN EHPLMN that between system, mobility strategy comprises the preferred access information of I-WLAN demonstration instruction, UE stores this parameter, and this parameter can be used for the manual network selection of UE.In the time that this parameter value is not 0, or only to the highest EHPLMN of UE display priority, or UE is shown to all EHPLMN according to priority sequence from high to low.

If comprise mobility strategy between system in access network information response message, and the optimizing roaming partner list that between system, mobility strategy comprises the preferred access information of I-WLAN, UE stores this list in I-WLAN access PLMN selector (the Operator Controlled PLMN Selector for I-WLAN access) file of its operator's control.UE need to carry out prioritization to Access Network, increases the consideration of PLMN priority: first, the SSID in the optimizing roaming partner list that traversal I-WLAN preferably accesses, sorts to SSID from high to low according to priority; Secondly,, within SSID, the PLMN territory in the optimizing roaming partner list that continuation traversal I-WLAN preferably accesses, sorts to PLMN from high to low according to priority.The SSID of UE selects the highest SSID of preferred SSID priority, and PLMN selects the preferably the highest PLMN territory of PLMN priority.

For example, the PLMN territory 1 of the optimizing roaming partner list that between system, mobility policing rule 1:I-WLAN preferably accesses, PLMN priority 1, SSID1, SSID priority 1;

The PLMN territory 2 of the optimizing roaming partner list that between system, mobility policing rule 2:I-WLAN preferably accesses, PLMN priority 2, SSID1, SSID priority 1;

The PLMN territory 1 of the optimizing roaming partner list that between system, mobility policing rule 3:I-WLAN preferably accesses, PLMN priority 1, SSID2, SSID priority 2;

The PLMN territory 2 of the optimizing roaming partner list that between system, mobility policing rule 4:I-WLAN preferably accesses, PLMN priority 2, SSID2, SSID priority 2.

So, the sequence of these 4 tactful regular priority is followed successively by from high to low: regular 1> rule 2> rule 3> rule 4.

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

If wrap access network discovery information in access network information response message, and access network discovery packets of information is containing PLMN territory, must carry out the PLMN selection course of I-WLAN, the PLMN that selects this PLMN territory to comprise.

Step S1014, UE carries out target access network selection and switches determining.

Step S1016, UE starts to be switched to the flow process of WLAN.

Preferred embodiment 3

First it should be noted that, in actual applications, this preferred embodiment goes for UE and obtains the situation of part I-WLAN management information (now I-WLAN management information may only provide PLMN to select relevant information, and do not provide SSID and priority thereof), can obtain whole I-WLAN management information although also go for UE, there is the situation of conflict between the two in the SSID priority that ANDSF and I-WLAN strategy provide simultaneously.

Figure 13 indicates PLMN to select the flow chart of priority while providing strategy and/or Access Network information according to the ANDSF of the preferred embodiment of the present invention 3 for UE, as shown in figure 13, the method mainly comprises the following steps (step S1302-step S1316):

Step S1302, ANDSF expands this management object of mobility strategy between system:

For the expansion of this management object, here please refer to Figure 14 (Figure 14 is according to the schematic diagram in the newly-increased PLMN of mobility strategy between the ANDSF management object system of the preferred embodiment of the present invention 3 territory), as shown in figure 14, under the preferred access child node of the node of mobility strategy between system, newly-increased PLMN territory (PLMN_Realms) leaf.

Wherein, the PLMN that in this management object, newly-increased PLMN territory comprises, is to have signed the PLMN of the roaming partner operator of roaming agreement with home-operator, and is that the access preferably accessing identifies corresponding PLMN.

Step S1304, ANDSF expands this management object of access network discovery information, as shown in the Fig. 6 in embodiment bis-.

Step S1306, the switching of WLAN has been initiated in UE judgement, and has found ANDSF.

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

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

In access network information response message, comprise mobility strategy and/or access network discovery information between system.The optional PLMN territory of carrying of mobility strategy between system; Access network discovery information, the optional PLMN territory of carrying.

Step S1312, mobility strategy and/or access network discovery information between the system in UE storage access network information response message.

If comprise mobility strategy between system in access network information response message, and between system, mobility strategy comprises PLMN territory, the highest SSID of Access Network priority that UE access ANDSF provides, the PLMN that the PLMN territory that this SSID of corresponding selection is corresponding comprises.

If ANDSF management object provide according to the Access Network priority of SSID, and the SSID priority that I-WLAN management information provides clashes, the Access Network priority according to SSID providing with ANDSF management object is as the criterion.

If wrap access network discovery information in access network information response message, and access network discovery packets of information is containing PLMN territory, must carry out the PLMN selection course of I-WLAN, the PLMN that selects this PLMN territory to comprise.

Step S1314, UE carries out target access network selection and switches determining.

Step S1316, UE starts to be switched to the flow process of WLAN.

Figure 15 is according to the structured flowchart of the access device of the Access Network that is positioned at UE of the embodiment of the present invention two, the scene that this application of installation is linked into 3GPP Access Network and wireless lan (wlan) in subscriber equipment (UE) simultaneously (wherein, 3GPP Access Network and WLAN have disposed respectively different V-ANDSF), in order to realize the cut-in method of the Access Network that above-described embodiment two provides, as shown in figure 15, this device mainly comprises: processing module 10, for carrying out target access network selection and switch determining according to mobility strategy between system and/or access network discovery information; Wherein, between system, mobility strategy comprises one of following: the WLAN (wireless local area network) (I-WLAN) of intercommunication is access node, Public Land Mobile Nerwork (PLMN) territory leaf preferably; Access network discovery information comprises: PLMN territory leaf.

Preferably, I-WLAN select access node also comprise following one of at least: I-WLAN ownership place Public Land Mobile Nerwork (HPLMN) priority instruction leaf, HPLMN directly access leaf, I-WLAN EHPLMN shows instruction leaf, optimum roaming list node, wherein, optimum roaming list node comprises: PLMN territory leaf, PLMN priority leaf, service set identifier (SSID) leaf and SSID priority leaf.

Preferably, the PLMN in PLMN territory is the PLMN that has signed the roaming partner operator of roaming agreement with home-operator.

Figure 16 is according to the structured flowchart of the access device of the Access Network that is positioned at ANDSF of the embodiment of the present invention two, the scene that this application of installation is linked into 3GPP Access Network and wireless lan (wlan) in subscriber equipment (UE) simultaneously (wherein, 3GPP Access Network and WLAN have disposed respectively different V-ANDSF), in order to realize the cut-in method of the Access Network that above-described embodiment two provides, as shown in figure 16, this device mainly comprises: indicating module 10, being used to indicate UE carries out target access network selection and switches determining according to mobility strategy between system and/or access network discovery information, wherein, between system, mobility strategy comprises one of following: the WLAN (wireless local area network) (I-WLAN) of intercommunication is access node, Public Land Mobile Nerwork (PLMN) territory leaf preferably, access network discovery information comprises: PLMN territory leaf.

Preferably, I-WLAN select access node also comprise following one of at least: I-WLAN ownership place Public Land Mobile Nerwork HPLMN priority instruction leaf, HPLMN directly access leaf, I-WLAN EHPLMN shows instruction leaf, optimum roaming list node, wherein, optimum roaming list node comprises: PLMN territory leaf, PLMN priority leaf, service set identifier (SSID) leaf and SSID priority leaf.

The method of selection Access Network and the device of selection Access Network that adopt above-described embodiment to provide, adopt H-ANDSF to UE send oneself address or be the address of its selected V-ANDSF, make UE can initiate according to these addresses the mode of access network information request message, or first by ANDSF, mobility strategy between existing system and/or access network discovery information are expanded, return to access network information response message so that UE successfully selects Access Network to UE receiving after the access network information request message of UE again, can make UE realize the selection of best Access Network, make UE can choose suitable access network selection strategy.

From above description, can find out, the present invention has realized following technique effect: adopt H-ANDSF to send the address of oneself or the address for its selected V-ANDSF to UE, make UE can initiate according to these addresses the mode of access network information request message, or first by ANDSF, mobility strategy between existing system and/or access network discovery information are expanded, return to access network information response message so that UE successfully selects Access Network to UE receiving after the access network information request message of UE again, solve the problem of not yet supporting the UE of focus 2.0 technology cannot realize the selection of the Access Network of roaming operator, and then reach operator and can provide the strategy that is diverted to its roaming operator to UE, make UE can select flexibly Access Network, ensure the success rate of access and the effect of result of use.

Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on the network that multiple calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in storage device and be carried out by calculation element, and in some cases, can carry out shown or described step with the order being different from herein, or they are made into respectively to each integrated circuit modules, or the multiple modules in them or step are made into single integrated circuit module to be realized.Like this, the present invention is not restricted to any specific hardware and software combination.

The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims (21)

1. select the method for V-ANDSF for one kind, be applied to the scene that user equipment (UE) is linked into 3GPP Access Network and WLAN (wireless local area network) WLAN simultaneously, wherein, described 3GPP Access Network and described WLAN have disposed respectively different visited place access network discoveries and selection function V-ANDSF, it is characterized in that, comprising:

User equipment (UE) is to ownership place access network discovery and selection function H-ANDSF sends access network discovery and selection function ANDSF network element is selected request message, wherein, described ANDSF network element selects request message to comprise: the PLMN mark 2 of the Public Land Mobile Nerwork PLMN mark 1 of described 3GPP Access Network, the access technology parameter 1 of described 3GPP, described WLAN and the access technology parameter 2 of described WLAN;

Selecting request message at described H-ANDSF according to described ANDSF network element is that described UE selects after V-ANDSF, described UE receives the ANDSF network element selection response message that described H-ANDSF sends, wherein, described ANDSF network element selects to carry in response message the V-ANDSF parameter of the V-ANDSF of described selection.

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

Be that described UE selects in the process of V-ANDSF at described H-ANDSF, described H-ANDSF selects the V-ANDSF in V-ANDSF, the described WLAN territory in described 3GPP Access Network territory successively according to sequencing;

Send to ownership place access network discovery and selection function H-ANDSF at user equipment (UE) before access network discovery and selection function ANDSF network element select request message, described method also comprises: described UE determines that described 3GPP Access Network and described WLAN are linked into respectively different PLMN.

3. method according to claim 1 and 2, is characterized in that, it is one of following that described V-ANDSF parameter comprises:

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

4. method according to claim 3, is characterized in that, after described UE receives the ANDSF network element selection response message of described H-ANDSF transmission, described method also comprises:

Described UE sends access network information request message according to described V-ANDSF parameter to the V-ANDSF of described selection, comprising:

In the time that described V-ANDSF parameter is described V-ANDSF-SN, described UE uses described V-ANDSF-SN to carry out DynamicHost protocol DHCP inquiry or domain name system DNS inquiry are set obtain the address of described V-ANDSF;

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

5. select the device of V-ANDSF for one kind, be positioned at user equipment (UE), be applied to the scene that UE is linked into 3GPP Access Network and WLAN (wireless local area network) WLAN simultaneously, wherein, described 3GPP Access Network and described WLAN have disposed respectively different visited place access network discoveries and selection function V-ANDSF, it is characterized in that, comprising:

The first sending module, for sending access network discovery and selection function ANDSF network element selection request message to ownership place access network discovery and selection function H-ANDSF, wherein, described ANDSF network element selects request message to comprise: the PLMN mark 2 of the Public Land Mobile Nerwork PLMN mark 1 of described 3GPP Access Network, the access technology parameter 1 of described 3GPP, described WLAN and the access technology parameter 2 of described WLAN;

Receiver module, be that described UE selects after V-ANDSF for selecting request message at described H-ANDSF according to described ANDSF network element, receive the ANDSF network element selection response message that described H-ANDSF sends, wherein, described ANDSF network element selects to carry in response message the V-ANDSF parameter of the V-ANDSF of described selection.

6. device according to claim 5, is characterized in that, described device also comprises:

Determination module, for send described ANDSF network element selection request message to described H-ANDSF at described the first sending module before, determines that described 3GPP Access Network and described WLAN are linked into respectively different PLMN.

7. according to the device described in claim 5 or 6, it is characterized in that, it is one of following that described V-ANDSF parameter comprises:

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

8. device according to claim 7, is characterized in that, described device also comprises:

The second sending module, for receive described ANDSF network element selection response message at described receiver module after, sends access network information request message according to described V-ANDSF parameter to the V-ANDSF of described selection.

9. device according to claim 8, is characterized in that, described the second sending module comprises:

Query unit, in the time that described V-ANDSF parameter is described V-ANDSF-SN, is used described V-ANDSF-SN to carry out DynamicHost protocol DHCP inquiry or domain name system DNS inquiry are set obtain the address of described V-ANDSF;

Transmitting element, for sending described access network information request message according to the address of described V-ANDSF to described V-ANDSF.

10. select the device of V-ANDSF for one kind, be positioned at ownership place access network discovery and selection function H-ANDSF, be applied to the scene that user equipment (UE) is linked into 3GPP Access Network and WLAN (wireless local area network) WLAN simultaneously, wherein, described 3GPP Access Network and described WLAN have disposed respectively different visited place access network discoveries and selection function V-ANDSF, it is characterized in that, comprising:

Select module, be used to the V-ANDSF in V-ANDSF and the described WLAN territory of user equipment (UE) in described 3GPP Access Network territory and select a V-ANDSF;

Sending module, selects response message for sending ANDSF network element to described UE, and wherein, described ANDSF network element selects to carry in response message the V-ANDSF parameter of the V-ANDSF of described selection.

11. devices according to claim 10, is characterized in that, described device also comprises:

Receiver module, select request message for receiving from the ANDSF network element of described UE, wherein, described ANDSF network element selects request message to comprise: the PLMN mark 2 of the Public Land Mobile Nerwork PLMN mark 1 of described 3GPP Access Network, the access technology parameter 1 of described 3GPP, described WLAN and the access technology parameter 2 of described WLAN.

12. according to the device described in claim 10 or 11, it is characterized in that, it is one of following that described V-ANDSF parameter comprises:

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

13. devices according to claim 12, is characterized in that, described selection module, being in the process of described UE selection V-ANDSF, is selected the V-ANDSF in V-ANDSF, the described WLAN territory in described 3GPP Access Network territory successively according to sequencing.

The cut-in method of 14. 1 kinds of Access Networks, be applied to the scene that user equipment (UE) is linked into 3GPP Access Network and WLAN (wireless local area network) WLAN simultaneously, wherein, described 3GPP Access Network and described WLAN have disposed respectively different visited place access network discoveries and selection function V-ANDSF, it is characterized in that, comprising:

Described UE carries out target access network selection and switches determining according to mobility strategy between system and/or access network discovery information;

Wherein, between described system, mobility strategy comprises one of following: the preferred access node of WLAN (wireless local area network) I-WLAN of intercommunication, Public Land Mobile Nerwork PLMN territory leaf;

Described access network discovery information comprises: described PLMN territory leaf.

15. methods according to claim 14, is characterized in that, described I-WLAN select access node also comprise following one of at least:

I-WLAN ownership place Public Land Mobile Nerwork HPLMN priority instruction leaf, HPLMN directly access leaf, I-WLAN equity ownership place Public Land Mobile Nerwork EHPLMN shows instruction leaf, optimum roaming list node, wherein, described optimum roaming list node comprises: described PLMN territory leaf, PLMN priority leaf, service set identifier SSID leaf and SSID priority leaf.

16. according to the method described in claims 14 or 15, it is characterized in that, the PLMN in described PLMN territory is the PLMN that has signed the roaming partner operator of roaming agreement with home-operator.

The access device of 17. 1 kinds of Access Networks, be positioned at user equipment (UE), be applied to the scene that UE is linked into 3GPP Access Network and WLAN (wireless local area network) WLAN simultaneously, wherein, described 3GPP Access Network and described WLAN have disposed respectively different visited place access network discoveries and selection function V-ANDSF, it is characterized in that, comprising:

Processing module, for carrying out target access network selection and switch determining according to mobility strategy between system and/or access network discovery information;

Wherein, between described system, mobility strategy comprises one of following: the preferred access node of WLAN (wireless local area network) I-WLAN of intercommunication, Public Land Mobile Nerwork PLMN territory leaf;

Described access network discovery information comprises: described PLMN territory leaf.

18. devices according to claim 17, is characterized in that, described I-WLAN select access node also comprise following one of at least:

I-WLAN ownership place Public Land Mobile Nerwork HPLMN priority instruction leaf, HPLMN directly access leaf, I-WLAN equity ownership place Public Land Mobile Nerwork EHPLMN shows instruction leaf, optimum roaming list node, wherein, described optimum roaming list node comprises: described PLMN territory leaf, PLMN priority leaf, service set identifier SSID leaf and SSID priority leaf.

19. according to the device described in claim 17 or 18, it is characterized in that, the PLMN in described PLMN territory is the PLMN that has signed the roaming partner operator of roaming agreement with home-operator.

The access device of 20. 1 kinds of Access Networks, be positioned at access network discovery and selection function ANDSF, be applied to the scene that user equipment (UE) is linked into 3GPP Access Network and WLAN (wireless local area network) WLAN simultaneously, wherein, described 3GPP Access Network and described WLAN have disposed respectively different visited place access network discoveries and selection function V-ANDSF, it is characterized in that, comprising:

Indicating module, is used to indicate described UE and carries out target access network selection and switch determining according to mobility strategy between described system and/or described access network discovery information;

Wherein, between described system, mobility strategy comprises one of following: the preferred access node of WLAN (wireless local area network) I-WLAN of intercommunication, Public Land Mobile Nerwork PLMN territory leaf;

Described access network discovery information comprises: described PLMN territory leaf.

21. devices according to claim 20, is characterized in that, described I-WLAN select access node also comprise following one of at least:

I-WLAN ownership place Public Land Mobile Nerwork HPLMN priority instruction leaf, HPLMN directly access leaf, I-WLAN equity ownership place Public Land Mobile Nerwork EHPLMN shows instruction leaf, optimum roaming list node, wherein, described optimum roaming list node comprises: described PLMN territory leaf, PLMN priority leaf, service set identifier SSID leaf and SSID priority leaf.