CN101827411B

CN101827411B - Network selection method, device and terminal

Info

Publication number: CN101827411B
Application number: CN200910118168.1A
Authority: CN
Inventors: 周青; 胡颖; 王珊珊; 吴问付
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2009-03-04
Filing date: 2009-03-04
Publication date: 2014-02-19
Anticipated expiration: 2029-03-04
Also published as: WO2010099741A1; CN101827411A

Abstract

The invention relates to the technical field of communication, and discloses a network selection method, a device and a terminal. The network selection method comprises the steps: acquiring information of mobility protocol supported by a target access network; acquiring mobility protocol used when the terminal is switched to the target access network; and determining whether to start a network re-selection to the target access network according to the information of mobility protocol supported by the target access network and the mobility protocol used when the terminal is switched to the target access network. The technical scheme provided by the embodiment of the invention is capable of determining whether to switch the terminal to the target access network.

Description

A kind of network selecting method, device and terminal

Technical field

The present invention relates to communication technical field, be specifically related to a kind of network selecting method, device and terminal.

Background technology

Development along with telecommunication technology, mobile packet network is packet network (the EPS:Evolved Packet System) development to evolution by 3G (Third Generation) Moblie (3G) network, the core net of mobile packet network also GPRS (GPRS) network in traditional Generation Mobile Telecommunication System (2G) and 3G network to mobile packet-based core networks (the EPC:Evolved Packet Core) development of evolution, EPC network can be supported traditional third generation partner program (3GPP) access technology (2G or 3G), the 3GPP access technology (Long Term Evolution) of evolution, the comprehensive access of the multiple access technologies such as non-3GPP (non-3GPP) access technology, wherein non-3GPP access technology comprises code division multiple access (CDMA:Code-Division Multiple Access) access, micro-wave access global inter communication (WiMax:WorldwideInteroperability for Microwave Access) access and Wireless Fidelity (WiFi:Wireless Fidelity) access etc.

Appearance along with bimodulus or multimode terminal (UE); make terminal can be linked into by different access technologies EPC network; in order to realize Network finding and the selection of multiple access technology, introduced Network finding and selection function (ANDSF:Access Network Discovery and Selection Function) entity and helped terminal to carry out network selection.

Existing a kind of network selecting method: ANDSF entity finds that terminal has entered after the coverage of target access network, if determine that target access network is preferred network (being the network of priority access under square one), ANDSF entity can arrive terminal by distributing policy (suggested terminals is switched to target access network or non-suggested terminals is switched to target access network), by terminal, according to strategy, determines whether to be switched to target access network.

In to the research of prior art, inventor finds: because terminal can be used different mobility protocols and is linked into network, network also can be used different mobility protocols, while therefore stating network selecting method in the use, the definite target access network that is switched to of strategy that terminal issues according to ANDSF entity, if terminal is not supported the mobility protocol that this target access network is used, will cause terminal cannot access this target access network.

Summary of the invention

The embodiment of the present invention provides a kind of network selecting method, device and terminal, and the technical scheme of using the embodiment of the present invention to provide, can determine whether terminal to switch to target access network.

The object of the embodiment of the present invention is achieved through the following technical solutions:

The embodiment of the present invention provides a kind of network selecting method, comprising:

Obtain the information of the mobility protocol of target access network support;

Obtain the mobility protocol that terminal is used when switching to described target access network;

The mobility protocol using when switching to described target access network according to the information of the mobility protocol of described target access network support and terminal, determines whether to initiate network reselection to described target access network.

The embodiment of the present invention also provides a kind of network selecting method, comprising:

Reception is from Network finding and the selection strategy of Network finding and selection entity, and described Network finding and selection strategy comprise the information of the mobility protocol of the target access network support that Network finding and selection entity obtain;

The mobility protocol that the mobility protocol of supporting according to described target access network and terminal are supported, determines whether to initiate network reselection to described target access network.

The mobility protocol that the mobility protocol of supporting according to described target access network and terminal are used at current access network, determines whether to initiate network reselection to described target access network.

The embodiment of the present invention also provides a kind of network selection apparatus, comprising:

Acquiring unit, for obtaining the information of the mobility protocol of target access network support; Obtain the mobility protocol that terminal is used when switching to described target access network;

Determining unit, for the information of the mobility protocol of the target access network support of obtaining according to described acquiring unit and the mobility protocol that terminal is used when switching to described target access network, determines whether to initiate network reselection to described target access network.

The embodiment of the present invention also provides a kind of terminal, comprising:

Receiving element, for receiving Network finding and selection strategy, described Network finding and selection strategy comprise the information of the mobility protocol that target access network is supported;

Determining unit, the mobility protocol that the mobility protocol of supporting for the target access network receiving according to described receiving element and terminal are supported, determines whether to initiate network reselection to described target access network.

Determining unit, the mobility protocol that the mobility protocol of supporting for the target access network receiving according to described receiving element and terminal are used at current access network, determines whether to initiate network reselection to described target access network.

The above technical scheme providing from the embodiment of the present invention can be found out, because the present embodiment of the present invention can obtain the mobility protocol that target access network is supported, and the mobility protocol that can use when switching to target access network according to the information of the mobility protocol of target access network support and terminal, determine whether to initiate network reselection to target access network, thereby in the time of can avoiding terminal to be directly switch into target access network, can not access target access network, can improve user's impression.

Accompanying drawing explanation

In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.

Fig. 1 is the structure chart of the network architecture that relates to of the embodiment of the present invention;

Fig. 2 is the flow chart of network selecting method embodiment mono-in the embodiment of the present invention;

Fig. 3 is the flow chart of network selecting method embodiment bis-in the embodiment of the present invention;

Fig. 4 is the flow chart of network selecting method embodiment tri-in the embodiment of the present invention;

Fig. 5 is the signaling process figure of network selecting method embodiment tetra-in the embodiment of the present invention;

Fig. 6 is the signaling process figure of network selecting method embodiment five in the embodiment of the present invention;

Fig. 7 is the signaling process figure of network selecting method embodiment six in the embodiment of the present invention;

Fig. 8 is the signaling process figure of network selecting method embodiment seven in the embodiment of the present invention;

Fig. 9 is the signaling process figure of network selecting method embodiment eight in the embodiment of the present invention;

Figure 10 is the structure chart of network selection apparatus embodiment mono-in the embodiment of the present invention;

Figure 11 is the structure chart of network selection apparatus embodiment bis-in the embodiment of the present invention;

Figure 12 is the structure chart of terminal embodiment mono-in the embodiment of the present invention;

Figure 13 is the structure chart of terminal embodiment bis-in the embodiment of the present invention;

Figure 14 is the structure chart of terminal embodiment tri-in the embodiment of the present invention.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.

The embodiment of the present invention provides network selecting method, device and terminal, first introduces the related network architecture of technical scheme that the embodiment of the present invention provides, and Fig. 1 has described the structure of this network architecture, comprising:

Terminal 101 has accessed current access network 102, and because terminal 101 can be linked into by different access technologies EPC network, therefore the quantity of current access network 102 can be a plurality of;

Access anchor point 103 is terminal anchor points while switching between different access networks; This access anchor point can be the packet data gateway (PGW:PDN GW) in EPC network;

Target access network 104 is the current not access networks of access of terminal 101, and owing to there being a plurality of networks in actual environment, so target access network also may have a plurality of;

Wherein current access network 102 and target access network 104 are except comprising access network, also comprised that each access network is linked into other network element of access anchor point, described other network elements can be the IADs of access network, as the gateway in EPC network (SGW), the packet data gateway of evolution (ePDG) etc.;

Network finding and selection functional entity 105 are to carry out the functional entity of Network finding and selection function, can be the ANDSF entities in EPC network;

Between Network finding and selection functional entity 105 and terminal 101, can there is E1 interface, E1 interface can be specifically the S14 interface in 3GPP framework, and Network finding and selection functional entity 105 can send to terminal 101 by Network finding and selection strategy by E1 interface;

Between Network finding and selection functional entity 105 and terminal 101, access anchor point 103, current access network 102 or target access network 104, can have interface E2, Network finding and selection functional entity 105 can be obtained by E2 interface the information of mobility protocol.

Further, the network architecture of embodiment of the present invention application can also comprise policy control functions entity, between Network finding and selection functional entity and policy control functions entity, can have E2 interface, Network finding and selection functional entity also can be obtained by E2 interface the information of mobility protocol from policy control functions (PCRF) entity.

As above introduced the network architecture that the embodiment of the present invention is used, introduced the technical scheme that the embodiment of the present invention provides as follows again, first introduced the network selecting method that the embodiment of the present invention provides, Fig. 2 has described the flow process of network selecting method embodiment mono-, comprising:

201, obtain the information of the mobility protocol of target access network support;

In terminal, entered after the coverage of target access network, terminal likely needs to be switched to this target access network, so ANDSF entity can obtain the information of the mobility protocol of this target access network support;

In the embodiment of the present invention, ANDSF entity obtains the information of the mobility protocol of target access network support, mainly can adopt following two kinds of modes:

(1) according to configuration information, obtain the information of the mobility protocol of target access network support;

(2) from the IAD control unit of target access network, obtain the information of the mobility protocol of target access network support; Particularly, can directly from the IAD control unit of target access network, obtain, also can from the IAD control unit of target access network, obtain by policy control functions entity.

202, obtain the mobility protocol that terminal is used when switching to target access network;

The mobility protocol that terminal is used when switching to target access network can have following four kinds:

1, the mobility protocol that terminal is used at current access network.

The mobility protocol that the mobility protocol that uses terminal to use at current access network is used when switching to target access network as terminal, can not carry out the switching of mobility protocol, thereby can guarantee to use the business that the mobility protocol that uses at current access network carries out can keep continuity.

Wherein, if obtain the access anchor point that the information spinner of the mobility protocol that terminal used at current access network accesses by terminal, obtain, suppose that accessing anchor point is PGW, mainly contains following two kinds of modes:

(1) directly from PGW, obtain the information of the mobility protocol of current access network use;

The information reporting of the mobility protocol that can directly current access network be used by PGW particularly, is to ANDSF entity; PGW can report the information of the mobility protocol of current access network use on one's own initiative to ANDSF entity, also can after the triggering message that has received the transmission of ANDSF entity, to ANDSF entity, report the information of the mobility protocol of current access network use; PGW and ANDSF entity are by E2 interface communication;

E2 interface protocol can be diameter (Diameter) agreement, in order to transmit terminal in the information of the mobility protocol of current access network use in Diameter, can use new Diameter message, this new Diameter message can be mobility protocol reporting message; Also can expand and transmit terminal in the information of the mobility protocol of current access network use existing Diameter message;

In order to transmit mobility protocol information in Diameter, can in the existing message of above-mentioned new message or expansion, carry a mobility protocol property value to (AVP:AttributeValuePair), as mobility protocol type (MobileProtocolType) AVP, value is enumerated value, specifically can from the agreements such as proxy mobile IP protocol version six (PMIPv6), mobile IP edition 4 (MIPv4), two stack mobile IP protocol versions six (DSMIPv6) and general packet wireless service tunnel protocol (GTP), choose;

(2) by policy control functions entity, from PGW, obtain terminal in the information of the mobility protocol of current access network use;

Particularly, PGW can be used the existing Gx interface of 3GPP, the information of the mobility protocol that terminal is used at current access network passes to PCRF entity, and PGW can, in the IP of existing Gx interface session establishment message, pass to PCRF entity by the mobility protocol of current use; Then the mobility protocol information that PCRF entity can be used terminal by E2 interface at current access network sends to ANDSF entity.

2, the mobility protocol that terminal and access anchor point are all supported;

In order to obtain terminal and to access the mobility protocol that anchor point is all supported, need to obtain the information of the mobility protocol of terminal support; Obtain the information of the mobility protocol of access anchor point support; Use the information of mobility protocol of terminal support and the mobility protocol that the common factor of the letter of the mobility protocol of access anchor point support is all supported as terminal and access anchor point.

Wherein obtaining the information of the mobility protocol of terminal support can carry out in the following way:

(1) according to the method for configuration, obtain the information of the mobility protocol that terminal supports, for example can calling party subscribed database, from user-subscribed database, obtain the mobility protocol information that terminal is supported;

(2) from terminal, obtain the information of the mobility protocol of this terminal support, particularly, terminal can be when being connected to ANDSF entity, the information of the mobility protocol of this terminal being supported by E2 interface notice ANDSF entity;

E2 interface protocol herein can be open mobile alliance device management (OMADM) agreement, in order to transmit above-mentioned mobility protocol information in OMA DM agreement, can in OMA DM agreement, carry an OMA DM management object (MO:Management Object), as mobility protocol list of types (MobileProtocolTypeList) MO, value is one or more MobileProtocolType, the value of MobileProtocolType is enumerated value, specifically can from the agreements such as PMIPv6, MIPv4, DSMIPv6 and GTP, choose.

Obtaining the information of the mobility protocol of access anchor point support can carry out in the following way:

(1) according to the method configuring, obtain the information of the mobility protocol of access anchor point support, particularly, ANDSF entity can configure the protocol type that present networks access anchor point can be supported, thereby can obtain the information of the mobility protocol of access anchor point support;

(2) from access anchor point, obtain the information of the mobility protocol of this access anchor point support, the information of the mobility protocol that access anchor point can be supported access anchor point by E2 interface is notified ANDSF entity;

E2 interface protocol herein can be Diameter, in order to transmit the information of the mobility protocol of access anchor point support in Diameter, can use a pair of new message, supposes it is mobility protocol capability query/reporting message; ANDSF entity sends the information of the mobility protocol of mobility protocol capability query information query access anchor point support, and access anchor point is by mobility protocol capability reporting message, and the information reporting of the mobility protocol that access anchor point is supported is to ANDSF entity;

In order to transmit the information of the mobility protocol of access anchor point support in Diameter, can in mobility protocol capability reporting message, carry a mobility protocol list AVP, as MobileProtocolTypeList AVP, value is one or more MobileProtocolType, the value of MobileProtocolType is enumerated value, specifically can from the agreements such as PMIPv6, MIPv4, DSMIPv6 and GTP, choose.

3, the mobility protocol that terminal is supported;

In actual applications, because access anchor point can be supported all mobility protocols conventionally, therefore, the mobility protocol that also can use the mobility protocol of terminal support to use when switching to target access network as terminal.

Obtain the method for information of the mobility protocol that terminal supports with 2;

4, the mobility protocol that access anchor point is supported.

Under some particular case, such as the mobility protocol that cannot obtain terminal and support, therefore, the mobility protocol that also can use the mobility protocol of access anchor point support to use when switching to target access network as terminal.

Obtain the method same 2 of the information of the mobility protocol that accesses anchor point support;

203, the mobility protocol using when switching to target access network according to the information of the mobility protocol of target access network support and terminal, determines whether to initiate network reselection to target access network.

Particularly, when the mobility protocol of target access network support comprises the mobility protocol that terminal used when switching to target access network, the mobility protocol that uses terminal to use when switching to target access network, initiates network reselection to target access network.

When the mobility protocol of target access network support does not comprise the mobility protocol that terminal used when switching to target access network, to target access network, do not initiate network reselection.

Wherein, if the quantity of the mobility protocol that terminal is used when switching to target access network is at least two, and a mobility protocol described in the mobility protocol of target access network support has only comprised at least two mobility protocols, is directly used a described mobility protocol to initiate network reselection to target access network.

If the quantity of the mobility protocol that terminal is used when switching to target access network is at least two, and described in the mobility protocol of target access network support has comprised at least two mobility protocols at least two, the mobility protocol that at least two terminals that need to comprise from the mobility protocol of target access network support are used when switching to target access network, select a mobility protocol, and then use a mobility protocol of selecting to initiate network reselection to target access network; Wherein, from select at random a mobility protocol from least two mobility protocols, also can from least two mobility protocols, select according to the preference of user's preference or operator a mobility protocol.

Process from network reselection to target access network that initiate can be directly to initiate terminal to switch to from current access network the switching flow of target access network.

Process from network reselection to target access network that initiate can be also that distributing policy arrives terminal, and strategy comprises target access network information, is initiated to switch to the switching flow of target access network by terminal according to target access network information; In strategy, may further include selected mobility protocol information, by terminal, according to this mobility protocol information, determined whether to initiate to switch;

The process to target access network initiation network reselection can not finish current flow process; Or distributing policy is to terminal, and strategy comprises the mobility protocol information that target access network information and objective network are supported, terminal is not initiated switching flow according to above-mentioned information;

In the present embodiment, 201 and 202 execution does not have ordinal relation;

From the above, the present embodiment can obtain the mobility protocol that target access network is supported, and can obtain the mobility protocol that terminal is used when switching to target access network, thereby the mobility protocol that can use when switching to target access network according to the information of the mobility protocol of target access network support and terminal, determine whether to initiate network reselection to target access network, in the time of can avoiding terminal to be directly switch into target access network, can not access target access network, thereby improve user's impression.

Fig. 3 has described the flow process of the network selecting method embodiment bis-that the embodiment of the present invention provides, and what this embodiment described is the handling process of terminal, comprising:

301, receive Network finding and the selection strategy from Network finding and selection entity, this Network finding and selection strategy comprise the information of the mobility protocol of the target access network support that Network finding and selection entity obtain;

302, the mobility protocol that the mobility protocol of supporting according to target access network and terminal are supported, determines whether to initiate network reselection to target access network.

Particularly, if the mobility protocol of target access network support comprises the mobility protocol that terminal is supported, use the mobility protocol mobility protocol that comprise and terminal support of target access network support to initiate network reselection to target access network.

If the mobility protocol of target access network support does not comprise the mobility protocol that terminal is supported, to target access network, do not initiate network reselection.

Wherein, if mobility protocol that the mobility protocol of target access network support comprises and that terminal is supported is at least two, the step that the mobility protocol mobility protocol that comprise and terminal support that uses target access network support is initiated network reselection to target access network comprises: from mobility protocol at least two mobility protocols that comprise and terminal support of target access network support, select a mobility protocol, use a mobility protocol of selecting to initiate network reselection to target access network; Particularly, can be random from two mobility protocols, select one, also can from least two mobility protocols, select one according to user's preference.

From the above, the present embodiment can obtain the mobility protocol that target access network is supported, and the mobility protocol that the mobility protocol that can support according to target access network and terminal are supported, determine whether to initiate network reselection to target access network, thereby while avoiding terminal to be directly switch into target access network, can not access target access network, can improve user's impression.

Fig. 4 has described the flow process of the network selecting method embodiment tri-that the embodiment of the present invention provides, and what this embodiment described is the handling process of terminal, comprising:

401, receive Network finding and the selection strategy from Network finding and selection entity, Network finding and selection strategy comprise the information of the mobility protocol of the target access network support that Network finding and selection entity obtain;

402, the mobility protocol that the mobility protocol of supporting according to target access network and terminal are used at current access network, determines whether to initiate network reselection to target access network.

Particularly, if the mobility protocol of target access network support comprises the mobility protocol that terminal is used at current access network, the mobility protocol that uses terminal to use at current access network is initiated network reselection to target access network.

If the mobility protocol of target access network support does not comprise the mobility protocol that terminal is used at current access network, to target access network, do not initiate network reselection;

From the above, the present embodiment can obtain the mobility protocol that target access network is supported, and the mobility protocol that the mobility protocol of supporting according to target access network and terminal are used at current access network, determine whether to initiate network reselection to target access network, thereby in the time of can avoiding terminal to be directly switch into target access network, can not access target access network, improve user's impression.

Fig. 5 has described the signaling process of the network selecting method embodiment tetra-that the embodiment of the present invention provides, the multimode terminal that in this embodiment, user uses, support the access of 3GPP access, non-3GPP access trusty (trustednon-3GPP access) and fly-by-night non-3GPP access (untrusted non-3GPP access), wherein the network of trusted non-3GPP access can be WiMax network, and the network of untrustednon-3GPP access can be WiFi network; WiFi network is the preferred network existing under service conditions.The access network of the current access of terminal is WiMax network, and the mobility protocol of use is MIPv4.

501, UE, by the IAD access EPC of WiMax network, carries out business by WiMax network; The mobility protocol that UE is used at WiMax network is MIPv4;

502, ANDSF entity obtains the mobility protocol information that UE is used at WiMax network;

In the embodiment of the present invention, ANDSF entity obtains mobility protocol information that UE uses at WiMax network can be in the following way:

(1) PGW directly reports ANDSF entity, and PGW can be used UE by E2 interface mobility protocol information at WiMax network sends to ANDSF entity;

Wherein, PGW, except reporting UE the mobility protocol of WiMax network use, can also report ANDSF entity by UE sign;

(2) the mobility protocol information reporting that PGW is used UE by PCRF entity at WiMax network is to ANDSF entity; PGW can utilize the existing Gx interface of 3GPP, and the mobility protocol that UE is used at WiMax network passes to PCRF entity, PCRF entity is used UE by E2 interface mobility protocol information notice ANDSF entity at WiMax network;

PGW can be in the IP of existing Gx interface session establishment message, and the mobility protocol that UE is used at WiMax network passes to PCRF entity;

PCRF entity, except reporting the mobility protocol of current use, can also report ANDSF entity by UE sign;

In the present embodiment, the mobility protocol using at WiMax network due to UE is MIPv4, thus ANDSF entity can to obtain the mobility protocol that UE uses at WiMax network from PGW be MIPv4.

Except the mobility protocol information that UE is used at WiMax network, ANDSF entity can also further obtain UE in the business information of WiMax network use and/or access the ability that anchor point switches between different agreement agreement, and in the present embodiment, accessing anchor point is PGW;

Wherein, ANDSF entity can obtain from PCRF entity or AF the business information that UE is used at WiMax network by E2 interface, and business information can comprise service quality (QoS:Quality ofService) rank, bandwidth etc.;

ANDSF entity can, by the method for configuration, obtain the ability that PGW switches between different agreement agreement; ANDSF entity also can pass through E2 interface, from PGW, obtains the ability that PGW switches between different agreement agreement; Wherein, E2 interface protocol can adopt Diameter.

503, UE moves to the hot zones of the WiFi network coverage;

Particularly, ANDSF entity can enter the hot zones of a WiFi network coverage according to the position information confirming UE of UE, and because WiFi network is preferred network, so ANDSF entity need to be confirmed whether to initiate network reselection to WiFi network; The positional information of UE can report by UE, or other network element reports as PGW;

504, ANDSF entity obtains the mobility protocol information of WiFi network support;

In the embodiment of the present invention, ANDSF entity can obtain the mobility protocol information that target access network (the present embodiment is WiFi network) is supported in the following way:

(1) according to the method for configuration, obtain; In the present embodiment, WiFi network is a fly-by-night non-3GPP access network, and UE is at fly-by-night non-3GPP access network, can only access EPC by PMIPv6 and two kinds of agreements of DSMIPv6, therefore, the protocol information of target WiFi network support is exactly PMIPv6 and DSMIPv6;

(2) the IAD control unit by target access network sends to ANDSF entity by E2 interface by the mobility protocol information of target access network support;

Wherein, the IAD control unit of target access network is according to the difference of target access network and difference can be for example ePDG, SGW, or the IAD in non-3GPP network etc.; In this enforcement, the IAD control unit of WiFi network can be ePDG.

E2 interface protocol can be Diameter, in order to transmit above-mentioned mobility protocol information in Diameter, can use a pair of new message, supposes it is mobility protocol capability query/reporting message; ANDSF entity sends mobility protocol capability query message and inquires about, and IAD control unit passes through mobility protocol capability reporting message, and the mobility protocol information reporting that target access network is used is to ANDSF entity.

The mobility protocol information of supporting in order to transmit target access network in Diameter, can in mobility protocol capability reporting message, carry a mobility protocol list AVP, as MobileProtocolTypeList AVP, value is one or more MobileProtocolType, the value of MobileProtocolType is enumerated value, specifically can from the agreements such as PMIPv6, MIPv4, DSMIPv6 and GTP, choose.In the present embodiment, ePDG reports ANDSF entity by PMIPv6 and DSMIPv6.

Because DSMIPv6 does not need the direct support of access network control unit, therefore, in actual applications, mobility protocol that can be using DSMIPv6 as the default support of target access network, thus do not need active reporting.

(3) information reporting of the mobility protocol that the IAD control unit of target access network also can be supported target access network by PCRF entity is to ANDSF entity.The IAD control unit of target access network can utilize the interface between the existing and PCRF entity of 3GPP, the mobility protocol information of target access network support is passed to PCRF entity, the mobility protocol information notice ANDSF entity that PCRF entity can be supported target access network by E2 interface.

In the present embodiment, the mobility protocol information that ANDSF entity can obtain WiFi network support is PMIPv6 and DSMIPv6.

505,, because WiFi network is not supported MIPv4, ANDSF entity determines to WiFi network, not initiate network reselection.

ANDSF entity is according to the mobility protocol of current use, and when obtaining terminal and accessing from target access network, the mobility protocol of use is MIPv4; Because target access network WiFi network is not supported MIPv4, therefore, to WiFi network, do not initiate network reselection.

Be understandable that, 502 need to can not affect the realization of the present embodiment in 505 front execution.

The ability that the business information that ANDSF entity can also be used at WiMax network according to UE or access anchor point switch between different agreement agreement judges whether to initiate network reselection to WiFi network, for example UE is in the current business that do not exist of WiMax network, or the business of current use allows the loss of traffic causing between different mobility protocols, the mobility protocol that UE is used when switching to WiFi network can not be the agreement that UE is used at WiMax network.If access anchor point is not supported in while switching between different agreement agreement, the mobility protocol that UE is used when switching to WiFi network can be only the agreement that UE is used at WiMax network.The present embodiment hypothesis access anchor point is not supported the switching of mobility protocol, or the business that UE is used at WiMax network is not supported the switching of mobility protocol, thereby just to WiFi network, initiate network reselection in the time of only comprising MIPv4 at the mobility protocol of WiFi network support.

Wherein, ANDSF entity can not done to judge directly and is initiated network reselection to WiFi network after obtaining the mobility protocol information of WiFi network support, Network finding and selection strategy are sent to UE, Network finding and selection strategy comprise target access network information, target access network information can be the service set (SSID:Service Set Identifier) of WiFi network etc., and the mobility protocol information of WiFi network support, in the present embodiment, refer to the protocol type of WiFi network support, i.e. PMIPv6 and DSMIPv6; The information that terminal can comprise according to Network finding and selection strategy, determines and initiates network reselection to WiFi network, does not carry out switching flow.ANDSF entity can be handed down to UE by Network finding and selection strategy by S14 interface.

From the above, the present embodiment can obtain the mobility protocol of WiFi network support, and the mobility protocol that can use at WiMax network according to terminal is determined to WiFi network initiation network reselection, thereby while having avoided terminal to switch to WiFi network, can not access WiFi network, can improve user's impression.

Fig. 6 has described the signaling process of the network selecting method embodiment five that the embodiment of the present invention provides, user uses multimode terminal in this embodiment, support 3GPP, the access of trusted non-3GPP access (WiMax network) and untrusted non-3GPP access (WiFi network); WiFi network is the preferred network existing under service conditions, and the current access of terminal WiMax network carries out business, and the mobility protocol using at WiMax network is PMIPv6.

601, UE, by the IAD access EPC of WiMax network, carries out business by WiMax network; The mobility protocol that UE is used at WiMax network is PMIPv6;

602, ANDSF entity obtains the mobility protocol information that UE is used at WiMax network;

With reference to 502, carry out.In the present embodiment, to obtain the mobility protocol that UE uses at WiMax network be PMIPv6 to ANDSF entity.

603, UE moves to the hot zones of the WiFi network coverage;

With reference to 503, carry out.

604, ANDSF entity obtains the mobility protocol information of WiFi network support;

With reference to 504, carry out.In the present embodiment, the mobility protocol that ANDSF entity obtains WiFi network support is PMIPv6 and DSMIPv6;

605,, due to WiFi network support PMIPv6, ANDSF entity is determined to WiFi network initiation network reselection.

Process from network reselection to WiFi network that initiate can be directly to initiate UE to be switched to from WiMax network the switching flow of WiFi network.

Be understandable that, 602 need to can not affect the realization of the present embodiment in 605 front execution.

Wherein, ANDSF entity can not done to judge directly and is initiated network reselection to WiFi network after obtaining the mobility protocol information of WiFi network support, Network finding and selection strategy are sent to UE, Network finding and selection strategy comprise target access network information (as SSID of WiFi network etc.), and the mobility protocol information of WiFi network support, in the present embodiment, refer to the protocol type of WiFi network support, i.e. PMIPv6 and DSMIPv6; The information that terminal can comprise according to Network finding and selection strategy, determines to WiFi network and initiates network reselection, carries out switching flow.ANDSF entity can be handed down to UE by Network finding and selection strategy by S14 interface.

From the above, the present embodiment can obtain the mobility protocol of WiFi network support, and can at the mobility protocol of WiMax network use, determine to WiFi network and initiate network reselection according to terminal, thereby make terminal arrive preferred WiFi network by successful switch, can improve user's impression.

Fig. 7 has described the signaling process of the network selecting method embodiment six that the embodiment of the present invention provides, user uses multimode terminal in this embodiment, support 3GPP, the access of trusted non-3GPP access (WiMax network) and untrusted non-3GPP access (WiFi network); 3GPP network is the preferred network existing under service conditions, and the current access of terminal WiFi network carries out business, and the mobility protocol using at WiFi network is PMIPv6.

701, UE, by the IAD ePDG access EPC of WiFi network, carries out business by WiFi network; The mobility protocol that UE is used at WiFi network is PMIPv6;

702, ANDSF entity obtains the mobility protocol information that UE is used at WiFi network;

With reference to 502, carry out.In the present embodiment, to obtain the mobility protocol that UE uses at WiFi network be PMIPv6 to ANDSF entity;

703, UE moves to the area that 3GPP covers;

Particularly, ANDSF entity can determine that UE has entered an area that 3GPP covers according to the positional information of UE, and because 3GPP network is preferred network, so ANDSF entity need to be confirmed whether to initiate network reselection to 3GPP network; The positional information of UE can report by UE, or other network element reports as PGW;

704, ANDSF entity obtains the mobility protocol information of target 3GPP network support;

With reference to 504, carry out.In the present embodiment, the IAD control unit of target access network is SGW; The mobility protocol that ANDSF entity obtains 3GPP network support is PMIPv6, GTP;

705, ANDSF entity, according to the mobility protocol information of target 3GPP network support, is initiated network reselection to 3GPP network;

Due to 3GPP network support PMIPv6, ANDSF entity can be initiated network reselection to 3GPP network.

Wherein, ANDSF entity can not done to judge directly and is initiated network reselection to 3GPP network after obtaining the mobility protocol information of WiFi network support, Network finding and selection strategy are sent to UE, the mobility protocol information that Network finding and selection strategy comprise the 3GPP network information and 3GPP network support, wherein the 3GPP network information comprises 3GPP network type, 3GPP network type can be Mobile Country Code MCC (MCC), Mobile Network Code (MNC), APN (APN) etc.; In the present embodiment, the mobility protocol of 3GPP network support comprises PMIPv6, GTP; The information that terminal can comprise according to Network finding and selection strategy, determines to 3GPP network and initiates network reselection.

From the above, the present embodiment can obtain the mobility protocol of 3GPP network support, and can at the mobility protocol of WiFi network use, determine to 3GPP network and initiate network reselection according to terminal, thereby make terminal arrive preferred 3GPP network by successful switch, can improve user's impression.

Fig. 8 has described the signaling process of the network selecting method embodiment seven that the embodiment of the present invention provides, user uses multimode terminal in this embodiment, support 3GPP, the access of trusted non-3GPP access (WiMax network) and untrusted non-3GPP access (WiFi network), terminal is supported PMIPv6; WiMax network is the preferred network existing under service conditions, and the current access of terminal WiFi network carries out business, and the mobility protocol using at WiFi network is PMIPv6.

801, UE is by the IAD ePDG access EPC of WiFi network, and the mobility protocol that UE is used at WiFi network is PMIPv6;

802, ANDSF entity obtains the mobility protocol information that UE supports;

In the embodiment of the present invention, ANDSF entity can obtain the mobility protocol information that UE supports in the following way:

(1) according to the method for static configuration, obtain, for example ANDSF entity can calling party subscribed database, from user-subscribed database, obtains the mobility protocol information that UE supports;

(2) the mobility protocol information notice ANDSF entity that UE supports UE by E2 interface;

UE can be when being connected to ANDSF entity, and by E2 interface, the mobility protocol information that UE is supported is notified ANDSF entity;

Wherein, E2 interface protocol can be OMA DM agreement, in order to transmit above-mentioned mobility protocol information in OMA DM agreement, can in OMA DM agreement, carry an OMA DM MO, as MobileProtocolTypeList MO, value is one or more MobileProtocolType, and the value of MobileProtocolType is enumerated value, specifically can from the agreements such as PMIPv6, MIPv4, DSMIPv6 and GTP, choose;

In the present embodiment, the mobility protocol information that ANDSF entity can obtain UE support is PMIPv6.

Because PMIPv6 does not need participating in directly of UE, therefore, in actual applications, mobility protocol that can be using PMIPv6 as the default support of UE, it is PMIPv6 that ANDSF entity can directly obtain the mobility protocol that UE supports.

803, ANDSF entity obtains the mobility protocol information that access anchor point is supported, in the present embodiment, accessing anchor point is PGW;

In the embodiment of the present invention, ANDSF entity can obtain the mobility protocol information that PGW supports in the following way:

(1) according to the method for static configuration, obtain, for example ANDSF entity can configure the mobility protocol that present networks PGW can support;

(2) the mobility protocol information that PGW supports PGW by E2 interface sends to ANDSF entity;

Wherein, E2 interface protocol can be Diameter, in order to transmit above-mentioned mobility protocol information in Diameter, can use a pair of new message, supposes it is mobility protocol capability query/reporting message; ANDSF entity sends mobility protocol capability query message and inquires about, and PGW passes through mobility protocol capability reporting message, and the mobility protocol information reporting that PGW is supported is to ANDSF entity;

The mobility protocol information of supporting in order to transmit access anchor point in Diameter, can in above-mentioned mobility protocol capability reporting message, carry a mobility protocol list AVP, as MobileProtocolTypeList AVP, value is one or more MobileProtocolType, the value of MobileProtocolType is enumerated value, specifically can from the agreements such as PMIPv6, MIPv4, DSMIPv6 and GTP, choose;

In the present embodiment, can to obtain the mobility protocol information that PGW supports be PMIPv6 and DSMIPv6 to ANDSF entity;

804, UE moves to the area of the WiMax network coverage;

ANDSF entity can determine that UE has entered the area of a WiMax network coverage according to the positional information of UE, and because WiMax network is preferred network, so ANDSF entity can determine whether to initiate network reselection to WiMax network; The positional information of UE can report by UE, or other network element reports as PGW;

805, ANDSF entity obtains the mobility protocol information of WiMax network support;

With reference to 504, carry out.In the present embodiment, the IAD control unit of target access network is the IAD in WiMax network;

In the present embodiment, can to obtain the mobility protocol of target WiMax network support be DSMIPv6 to ANDSF entity;

806, because UE only supports PMIPv6, target WiMax network is only supported DSMIPv6, and ANDSF entity is not initiated network reselection to WiMax network;

The mobility protocol PMIPv6 that ANDSF entity is supported according to UE, mobility protocol PMIPv6 and DSMIPv6 that PGW supports, obtaining the mobility protocol using when terminal switches to WiMax network is PMIPv6; Because WiMax network is not supported PMIPv6, therefore, to WiMax network, do not initiate network reselection.

Wherein, 802 and 803 do not have the sequencing of carrying out, and only need 802 and 803 all in 806 front execution, can not affect the realization of the present embodiment.

Wherein, ANDSF entity can not done to judge directly and is initiated network reselection to WiMax network after obtaining the mobility protocol information of WiMax network support, Network finding and selection strategy are sent to UE, the mobility protocol information (DSMIPv6) that Network finding and selection strategy comprise the WiMax network information (as sign of WiMax network etc.) and WiMax network support; The information that terminal can comprise according to Network finding and selection strategy, determines and initiates network reselection to WiMax network.

From the above, the present embodiment can obtain the mobility protocol of terminal and the support of access anchor point, thereby obtain the mobility protocol using when terminal switches to WiMax network, and can not determine and initiate network reselection to WiMax network according to the mobility protocol of WiMax network support, thereby while having avoided terminal to switch to WiMax network, can not access WiMax network, can improve user's impression.

Fig. 9 has described the signaling process of the network selecting method embodiment eight that the embodiment of the present invention provides, user uses multimode terminal in this embodiment, support 3GPP, the access of trusted non-3GPP access (WiMax network) and untrusted non-3GPP access (WiFi network), terminal is supported PMIPv6 and DSMIPv6; WiMax network is the preferred network existing under service conditions, and the current access of terminal WiFi network carries out business, and the mobility protocol using at WiFi network is PMIPv6.

901, UE is by the IAD ePDG access EPC of WiFi network, and the mobility protocol that UE is used at WiMax network is PMIPv6;

902, ANDSF entity obtains the mobility protocol information that UE supports;

With reference to 802, carry out.In the present embodiment, can to obtain the mobility protocol information that UE supports be PMIPv6 and DSMIPv6 to ANDSF entity;

903, ANDSF entity obtains the mobility protocol information that access anchor point is supported, in the present embodiment, accessing anchor point is PGW;

With reference to 803, carry out.In the present embodiment, the mobility protocol information that ANDSF entity can obtain PGW support is PMIPv6 and DSMIPv6;

904, UE moves to the area of the WiMax network coverage;

With reference to 804, carry out.

905, ANDSF entity obtains the mobility protocol information of target WiMax network support;

With reference to 805, carry out.In the present embodiment, the mobility protocol information that ANDSF entity obtains WiMax network support is DSMIPv6;

906,, due to WiMax network support DSMIPv6, to WiMax network, initiate network reselection;

Mobility protocol PMIPv6 and DSMIPv6 that ANDSF entity is supported according to UE, mobility protocol PMIPv6 and DSMIPv6 that PGW supports, when obtaining terminal and switching to WiMax network, operable mobility protocol list comprises PMIPv6 and DSMIPv6, due to WiMax network support DSMIPv6, therefore can use DSMIPv6 to initiate network reselection to WiMax network.

Further, ANDSF entity can also be according to operator or user's preference, from the mobility protocol list that may use, and the mobility protocol using while selecting terminal to switch to WiMax network; Wherein, ANDSF entity can, by the method for configuration, obtain the mobility protocol of operator's preference; ANDSF entity can obtain user's preference by the method for configuration, also can obtain from UE user's preference.

Wherein, ANDSF entity can not done to judge directly and is initiated network reselection to WiMax network after obtaining the mobility protocol information of WiMax network support, Network finding and selection strategy are sent to UE, the mobility protocol information (DSMIPv6) that Network finding and selection strategy comprise the WiMax network information (as sign of WiMax network etc.) and WiMax network support; The information that terminal can comprise according to Network finding and selection strategy, determines and uses DSMIPv6 to initiate network reselection to WiMax network.

From the above, the present embodiment can obtain the mobility protocol of terminal and the support of access anchor point, thereby obtain the mobility protocol using when terminal switches to WiMax network, and can determine to WiMax network and initiate network reselection according to the mobility protocol of WiMax network support, thereby make terminal arrive preferred WiMax network by successful switch, can improve user's impression.

Introduce the network selection apparatus that the embodiment of the present invention provides, Figure 10 has described the structure of network selection apparatus embodiment mono-, comprising again:

Acquiring unit 1001, for obtaining the information of the mobility protocol of target access network support; Obtain the mobility protocol that terminal is used when switching to this target access network;

Wherein, acquiring unit 1001 can comprise: the first acquiring unit 10011, for obtaining terminal in the information of the mobility protocol of current access network use; The first determining unit 10012, the mobility protocol that the mobility protocol that the terminal of obtaining for definite use the first acquiring unit 10011 is used at current access network is used when switching to target access network as terminal.

Determining unit 1002, the mobility protocol that the information of the mobility protocol of supporting for the target access network of obtaining according to acquiring unit 1001 and the terminal that acquiring unit 1001 (can be specifically the first determining unit 10012) obtains are used when switching to target access network, determines whether to initiate network reselection to target access network.

From the above, the present embodiment of network selection apparatus can obtain the mobility protocol that target access network is supported, and can obtain the mobility protocol that terminal is used when switching to target access network, thereby the mobility protocol that can use when switching to target access network according to the information of the mobility protocol of target access network support and terminal, determine whether to initiate network reselection to target access network, in the time of can avoiding terminal to be directly switch into target access network, can not access target access network, thereby improve user's impression.

As shown in figure 10, the network selection apparatus embodiment mono-that the embodiment of the present invention provides can also comprise initiation unit 1003, while initiating network reselection for determining in determining unit 1002 to target access network, the mobility protocol that the terminal of using acquiring unit 1001 to obtain is used when switching to target access network is initiated network reselection to target access network.

Figure 11 has described the structure of network selection apparatus embodiment bis-, comprising:

Acquiring unit 1101, for obtaining the information of the mobility protocol of target access network support; Obtain the mobility protocol that terminal is used when switching to this target access network;

Wherein, acquiring unit 1101 can comprise: second acquisition unit 11011, the information of mobility protocol and the information of the mobility protocol that access anchor point is supported for obtaining terminal, supported; The second determining unit 11012, the information of the mobility protocol that the information of the mobility protocol of supporting for the terminal of obtaining according to second acquisition unit 11011 and access anchor point are supported, the mobility protocol that definite mobility protocol that uses terminal and access anchor point all to support is used when switching to target access network as terminal.

Determining unit 1102, the mobility protocol that the information of the mobility protocol of supporting for the target access network of obtaining according to acquiring unit 1101 and the terminal that acquiring unit 1101 (can be specifically the second determining unit 11012) obtains are used when switching to target access network, determines whether to initiate network reselection to target access network.

Selected cell 1103, for determining to target access network and initiate network reselection in determining unit 1002, and the quantity that acquiring unit 1101 (can be specifically the second determining unit 11012) obtains the mobility protocol that terminal used when switching to target access network during at least two, is selected a mobility protocol from least two mobility protocols;

Initiate unit 1104, for a mobility protocol that uses selected cell 1103 to select, to target access network, initiate network reselection.

From the above, the present embodiment of network selection apparatus can obtain the mobility protocol that target access network is supported, and can obtain the mobility protocol that terminal and the mobility protocol all supported of access anchor point are used when switching to target access network as terminal, thereby only when having comprised the mobility protocol that terminal and access anchor point all support, the mobility protocol of target access network support just to target access network, initiates network reselection, thereby while avoiding terminal to be directly switch into target access network, can not access target access network, can improve user's impression.

The network selection apparatus that the embodiment of the present invention provides can be used as ANDSF entity.

Introduce the terminal that the embodiment of the present invention provides, Figure 12 has described the structure of terminal embodiment mono-, comprising again:

Receiving element 1201, for receiving Network finding and selection strategy, Network finding and selection strategy comprise the information of the mobility protocol that target access network is supported;

Determining unit 1202, the mobility protocol that the mobility protocol of supporting for the target access network receiving according to receiving element and terminal are supported, determines whether to initiate network reselection to target access network.

From the above, the present embodiment of terminal can obtain the mobility protocol that target access network is supported, and the mobility protocol that can use when switching to target access network according to the information of the mobility protocol of target access network support and terminal, determine whether to initiate network reselection to target access network, thereby while avoiding terminal to be directly switch into target access network, can not access target access network, improve user's impression.

As shown in figure 12, the terminal embodiment mono-that the embodiment of the present invention provides can also comprise:

Initiate unit 1203, while initiating network reselection for determining in determining unit 1202 to target access network, the mobility protocol of the terminal support that the mobility protocol of use target access network support is included is initiated network reselection to target access network.

Figure 13 has described the structure of terminal embodiment bis-, comprising:

Receiving element 1301, for receiving Network finding and selection strategy, this Network finding and selection strategy comprise the information of the mobility protocol that target access network is supported;

Determining unit 1302, the mobility protocol that the mobility protocol of supporting for the target access network receiving according to receiving element and terminal are supported, determines whether to initiate network reselection to target access network;

Selected cell 1303, for determining to target access network and initiate network reselection in determining unit 1302, and the quantity of the mobility protocol of supporting during the target access network that receiving element 1301 receives is at least two, when this terminal is supported at least two in these at least two mobility protocols, from least two mobility protocols of this terminal support, select a mobility protocol;

Initiate unit 1304, for a mobility protocol that uses selected cell 1203 to select, to target access network, initiate network reselection.

From the above, the present embodiment of terminal can obtain the mobility protocol that target access network is supported, mobility protocol that thereby the mobility protocol that can use target access network support comprises and terminal support is initiated network reselection to target access network, thereby can guarantee that terminal can successfully switch to target access network, improve user's impression.

Figure 14 has described the structure of terminal embodiment tri-, comprising:

Receiving element 1401, for receiving Network finding and selection strategy, Network finding and selection strategy comprise the information of the mobility protocol that target access network is supported;

Determining unit 1402, the mobility protocol that the mobility protocol of supporting for the target access network receiving according to receiving element 1401 and terminal are used at current access network, determines whether to initiate network reselection to target access network.

From the above, the present embodiment of terminal can obtain the mobility protocol that target access network is supported, and the mobility protocol that the mobility protocol that can support according to target access network and terminal are supported, determine whether to initiate network reselection to target access network, in the time of can avoiding terminal to be directly switch into target access network, can not access target access network, improve user's impression.

As shown in figure 14, the terminal embodiment tri-that the embodiment of the present invention provides can also comprise initiation unit 1403, while initiating network reselection for determining in determining unit 1402 to target access network, the mobility protocol that uses terminal to use at current access network is initiated network reselection to target access network.

One of ordinary skill in the art will appreciate that all or part of flow process realizing in above-described embodiment method, to come the hardware that instruction is relevant to complete by computer program, described program can be stored in a computer read/write memory medium, this program, when carrying out, can comprise as the flow process of the embodiment of above-mentioned each side method.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-OnlyMemory, ROM) or random store-memory body (Random Access Memory, RAM) etc.

A kind of network selecting method, device and the terminal that above the embodiment of the present invention are provided are described in detail, and the explanation of above embodiment is just for helping to understand method of the present invention and thought thereof; , for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention meanwhile.

Claims

1. a network selecting method, is characterized in that, comprising:

Obtain the information of the mobility protocol of target access network support; The step of the information of the described mobility protocol that obtains target access network support comprises: the information of obtaining the mobility protocol that described target access network supports according to configuration information; Or from the IAD control unit of described target access network, obtain the information of the mobility protocol that target access network supports;

The mobility protocol using when switching to described target access network according to the information of the mobility protocol of described target access network support and terminal, determine whether to initiate network reselection to described target access network, specifically comprise: if the mobility protocol of described target access network support does not comprise the mobility protocol that terminal is used when switching to target access network, to described target access network, do not initiate network reselection; Or if the mobility protocol of described target access network support comprises the mobility protocol that terminal is used when switching to described target access network, use the mobility protocol that terminal is used when switching to described target access network to initiate network reselection to described target access network.

2. network selecting method as claimed in claim 1, is characterized in that, the step of information that the described IAD control unit from target access network obtains the mobility protocol of target access network support comprises:

Directly from the IAD control unit of target access network, obtain the information of the mobility protocol of target access network support; Or

By policy control functions entity, from the IAD control unit of target access network, obtain the information of the mobility protocol of target access network support.

3. the network selecting method as described in claim 1 to 2 any one, is characterized in that, the mobility protocol that described terminal is used when switching to target access network comprises:

The mobility protocol that described terminal is used at current access network; Or

The mobility protocol that described terminal is supported; Or

The mobility protocol that the access anchor point of described terminal access is supported; Or

The mobility protocol that the access anchor point of described terminal and the access of this terminal is all supported.

4. network selecting method as claimed in claim 3, is characterized in that, described in obtain the mobility protocol that described terminal used at current access network step comprise:

Directly from described access anchor point, obtain terminal in the information of the mobility protocol of current access network use; Or

By policy control functions entity, from described access anchor point, obtain terminal in the information of the mobility protocol of current access network use.

5. network selecting method as claimed in claim 3, is characterized in that, described in obtain the mobility protocol of terminal support step comprise:

According to configuration information, obtain the information of the mobility protocol of described terminal support; Or

From described terminal, obtain the information of the mobility protocol of this terminal support.

6. network selecting method as claimed in claim 3, is characterized in that, described in obtain the access anchor point support of terminal access the step of mobility protocol comprise:

According to configuration information, obtain the information of the mobility protocol of described access anchor point support; Or

From described access anchor point, obtain the information of the mobility protocol of this access anchor point support.

7. the network selecting method as described in claim 1 to 2 any one, is characterized in that, the quantity of the mobility protocol that terminal is used when switching to described target access network is at least two;

A mobility protocol described in if the mobility protocol of described target access network support only comprises at least two mobility protocols, the step that the mobility protocol that described use terminal is used when switching to described target access network is initiated network reselection to described target access network comprises:

Use a described mobility protocol to initiate network reselection to described target access network;

Or

At least two mobility protocols at least two mobility protocols described in if the mobility protocol of described target access network support comprises, the step that the mobility protocol that described use terminal is used when switching to described target access network is initiated network reselection to described target access network comprises:

The mobility protocol that at least two terminals that comprise from the mobility protocol of described target access network support are used when switching to described target access network, select a mobility protocol, use a mobility protocol of selecting to initiate network reselection to described target access network.

8. network selecting method as claimed in claim 7, it is characterized in that, the mobility protocol that at least two terminals that the described mobility protocol from target access network support comprises are used when switching to described target access network, select the step of a mobility protocol to comprise:

The mobility protocol that at least two terminals that comprise from the mobility protocol of target access network support are used when switching to described target access network, select at random a mobility protocol; Or

The mobility protocol that at least two terminals that comprise from the mobility protocol of target access network support are used when switching to described target access network, according to user's preference, select a mobility protocol; Or

The mobility protocol that at least two terminals that comprise from the mobility protocol of target access network support are used when switching to described target access network, according to the preference of operator, select a mobility protocol.

9. a network selecting method, is characterized in that, comprising:

Reception is from Network finding and the selection strategy of Network finding and selection entity, and described Network finding and selection strategy comprise the information of the mobility protocol of the target access network support that Network finding and selection entity obtain; The step of information of obtaining the mobility protocol of target access network support comprises: the information of obtaining the mobility protocol that described target access network supports according to configuration information; Or from the IAD control unit of described target access network, obtain the information of the mobility protocol that target access network supports;

The mobility protocol that the mobility protocol of supporting according to described target access network and terminal are supported, determine whether to initiate network reselection to described target access network, specifically comprise: if the mobility protocol of described target access network support does not comprise the mobility protocol that terminal is supported, to described target access network, do not initiate network reselection; If or the mobility protocol of described target access network support comprises the mobility protocol that terminal is supported, the mobility protocol that the included terminal of mobility protocol of using target access network to support is supported is initiated network reselection to described target access network.

10. network selecting method as claimed in claim 9, is characterized in that, the mobility protocol that the included terminal of mobility protocol that target access network is supported is supported is at least two;

The step that the mobility protocol of the terminal support that the mobility protocol of described use target access network support is included is initiated network reselection to described target access network comprises:

From described at least two mobility protocols, select a mobility protocol, use a described mobility protocol to initiate network reselection to described target access network.

11. network selecting methods as claimed in claim 10, is characterized in that, the described step of a mobility protocol of selecting from least two mobility protocols comprises:

From described at least two mobility protocols, select at random a mobility protocol; Or

According to user's preference, from described at least two mobility protocols, select a mobility protocol.

12. 1 kinds of network selecting methods, is characterized in that, comprising:

The mobility protocol that the mobility protocol of supporting according to described target access network and terminal are used at current access network, determine whether to initiate network reselection to described target access network, specifically comprise: if the mobility protocol of described target access network support comprises the mobility protocol that terminal is used at current access network, use the mobility protocol that described terminal is used at current access network to initiate network reselection to described target access network; If or the mobility protocol of described target access network support do not comprise the mobility protocol that terminal is used at current access network, do not initiate network reselection to described target access network.

13. 1 kinds of network selection apparatus, is characterized in that, comprising:

Acquiring unit, for obtaining the information of the mobility protocol of target access network support; Obtain the mobility protocol that terminal is used when switching to described target access network; The step of the information of the described mobility protocol that obtains target access network support comprises: the information of obtaining the mobility protocol that described target access network supports according to configuration information; Or from the IAD control unit of described target access network, obtain the information of the mobility protocol that target access network supports; Determining unit, for the information of the mobility protocol of the target access network support of obtaining according to described acquiring unit and the mobility protocol that terminal is used when switching to described target access network, determines whether to initiate network reselection to described target access network; Initiate unit, while initiating network reselection for determining in described determining unit to described target access network, the mobility protocol that the terminal of using described acquiring unit to obtain is used when switching to described target access network is initiated network reselection to described target access network.

14. network selection apparatus as claimed in claim 13, is characterized in that, also comprise:

Selected cell during at least two, is selected a mobility protocol for the quantity of obtaining the mobility protocol that terminal used when switching to target access network at described acquiring unit from least two mobility protocols;

Described initiation unit, for being used the mobility protocol that described selected cell is selected to initiate network reselection to described target access network.

15. network selection apparatus as described in claim 13 or 14, is characterized in that, described acquiring unit comprises:

The first acquiring unit, for obtaining described terminal in the information of the mobility protocol of current access network use;

The first determining unit, the mobility protocol that the mobility protocol that the terminal of obtaining for described the first acquiring unit of definite use is used at current access network is used when switching to target access network as terminal.

16. network selection apparatus as described in claim 13 or 14, is characterized in that, described acquiring unit comprises:

Second acquisition unit, the information of mobility protocol and the information of the mobility protocol that described access anchor point is supported for obtaining described terminal, supported;

The second determining unit, the information of the mobility protocol that the information of the mobility protocol of supporting for the terminal of obtaining according to described second acquisition unit and described access anchor point are supported, the mobility protocol that definite mobility protocol that uses described terminal and described access anchor point all to support is used when switching to described target access network as terminal.

17. 1 kinds of networks are selected terminal, it is characterized in that, comprising:

Receiving element, for receiving Network finding and selection strategy, described Network finding and selection strategy comprise the information of the mobility protocol that target access network is supported; The step of information of obtaining the mobility protocol of target access network support comprises: the information of obtaining the mobility protocol that described target access network supports according to configuration information; Or from the IAD control unit of described target access network, obtain the information of the mobility protocol that target access network supports;

Determining unit, the mobility protocol that the mobility protocol of supporting for the target access network receiving according to described receiving element and terminal are supported, determines whether to initiate network reselection to described target access network;

Initiate unit, while initiating network reselection for determining in described determining unit to described target access network, the mobility protocol that the included described terminal of mobility protocol of using target access network to support is supported is initiated network reselection to described target access network.

18. terminals as claimed in claim 17, is characterized in that, also comprise:

Selected cell, for at described receiving element, receive target access network time the mobility protocol supported quantity be at least two, and when described terminal is supported at least two in these at least two mobility protocols, from least two mobility protocols, select a mobility protocol;

19. 1 kinds of networks are selected terminal, it is characterized in that, comprising:

Determining unit, the mobility protocol that the mobility protocol of supporting for the target access network receiving according to described receiving element and terminal are used at current access network, determines whether to initiate network reselection to described target access network;

Initiate unit, while initiating network reselection for determining in described determining unit to described target access network, use the mobility protocol that described terminal is used at current access network to initiate network reselection to described target access network.