CN101827411B - A network selection method, device and terminal - Google Patents

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 network selection method, device and terminal

technical field

The present invention relates to the field of communication technology, in particular to a network selection method, device and terminal.

Background technique

With the development of telecommunication technology, the mobile packet network has developed from the third generation mobile communication (3G) network to the evolved packet network (EPS: Evolved Packet System), and the core network of the mobile packet network has also changed from the traditional second generation mobile communication (2G ) and the general packet radio service (GPRS) network in the 3G network are developing towards the evolved mobile packet core network (EPC: Evolved Packet Core), and the EPC network can support the traditional third generation partnership project (3GPP) access technology (2G or 3G), evolved 3GPP access technology (Long Term Evolution technology), non-3GPP (non-3GPP) access technology and other integrated access technologies, wherein non-3GPP access technology includes Code Division Multiple Access ( CDMA: Code-Division Multiple Access) access, Microwave Access Global Interoperability (WiMax: Worldwide Interoperability for Microwave Access) access and Wireless Fidelity (WiFi: Wireless Fidelity) access, etc.

With the emergence of dual-mode or multi-mode terminals (UE), the terminal can access the EPC network through different access technologies. In order to realize the network discovery and selection of multiple access technologies, the network discovery and selection function ( ANDSF: Access Network Discovery and Selection Function) entity helps the terminal to perform network selection.

An existing network selection method: after the ANDSF entity finds that the terminal has entered the coverage of the target access network, if it determines that the target access network is the preferred network (that is, the network that is preferentially accessed under the same circumstances), the ANDSF entity will issue a The policy (recommending the terminal to switch to the target access network or not recommending the terminal to switch to the target access network) is up to the terminal, and the terminal determines whether to switch to the target access network according to the policy.

In the research on the prior art, the inventor found that: since the terminal can use different mobility protocols to access the network, and the network can also use different mobility protocols, when using the above network selection method, the terminal according to the ANDSF entity If the terminal does not support the mobility protocol used by the target access network, the terminal cannot access the target access network.

Contents of the invention

Embodiments of the present invention provide a network selection method, device, and terminal. Using the technical solutions provided by the embodiments of the present invention, it can be determined whether to switch the terminal to a target access network.

The purpose of the embodiments of the present invention is achieved through the following technical solutions:

An embodiment of the present invention provides a network selection method, including:

Acquiring information about mobility protocols supported by the target access network;

acquiring a mobility protocol used by the terminal when switching to the target access network;

Determine whether to initiate network reselection to the target access network according to the information of the mobility protocol supported by the target access network and the mobility protocol used by the terminal when switching to the target access network.

The embodiment of the present invention also provides a network selection method, including:

receiving a network discovery and selection policy from a network discovery and selection entity, where the network discovery and selection policy includes information on mobility protocols supported by the target access network acquired by the network discovery and selection entity;

Determine whether to initiate network reselection to the target access network according to the mobility protocol supported by the target access network and the mobility protocol supported by the terminal.

The embodiment of the present invention also provides a network selection method, including:

receiving a network discovery and selection policy from a network discovery and selection entity, where the network discovery and selection policy includes information on mobility protocols supported by the target access network acquired by the network discovery and selection entity;

Determine whether to initiate network reselection to the target access network according to the mobility protocol supported by the target access network and the mobility protocol used by the terminal in the current access network.

The embodiment of the present invention also provides a network selection device, including:

An acquiring unit, configured to acquire information on mobility protocols supported by the target access network; acquire the mobility protocol used by the terminal when switching to the target access network;

A determining unit, configured to determine whether to transfer to the target access network according to the mobility protocol information supported by the target access network acquired by the acquiring unit and the mobility protocol used by the terminal when switching to the target access network Initiate network reelection.

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

A receiving unit, configured to receive a network discovery and selection strategy, where the network discovery and selection strategy includes information about mobility protocols supported by the target access network;

The determining unit is configured to determine whether to initiate network reselection to the target access network according to the mobility protocol supported by the target access network and the mobility protocol supported by the terminal received by the receiving unit.

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

A receiving unit, configured to receive a network discovery and selection strategy, where the network discovery and selection strategy includes information about mobility protocols supported by the target access network;

The determining unit is configured to determine whether to initiate network reselection to the target access network according to the mobility protocol supported by the target access network received by the receiving unit and the mobility protocol used by the terminal in the current access network.

From the above technical solutions provided by the embodiments of the present invention, it can be seen that the embodiments of the present invention can acquire the mobility protocols supported by the target access network, and can obtain the mobility protocols supported by the target access network and the terminal in handover The mobility protocol used when reaching the target access network determines whether to initiate network reselection to the target access network, thereby preventing the terminal from being unable to access the target access network when directly switching to the target access network, and improving user experience.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort.

FIG. 1 is a structural diagram of a network architecture involved in an embodiment of the present invention;

FIG. 2 is a flow chart of Embodiment 1 of the network selection method in the embodiment of the present invention;

FIG. 3 is a flow chart of Embodiment 2 of the network selection method in the embodiment of the present invention;

FIG. 4 is a flow chart of Embodiment 3 of the network selection method in the embodiment of the present invention;

FIG. 5 is a signaling flowchart of Embodiment 4 of the network selection method in the embodiment of the present invention;

FIG. 6 is a signaling flowchart of Embodiment 5 of the network selection method in the embodiment of the present invention;

FIG. 7 is a signaling flowchart of Embodiment 6 of the network selection method in the embodiment of the present invention;

FIG. 8 is a signaling flowchart of Embodiment 7 of the network selection method in the embodiment of the present invention;

FIG. 9 is a signaling flowchart of Embodiment 8 of the network selection method in the embodiment of the present invention;

FIG. 10 is a structural diagram of Embodiment 1 of a network selection device in an embodiment of the present invention;

FIG. 11 is a structural diagram of Embodiment 2 of the network selection device in the embodiment of the present invention;

FIG. 12 is a structural diagram of the terminal embodiment 1 in the embodiment of the present invention;

FIG. 13 is a structural diagram of the second embodiment of the terminal in the embodiment of the present invention;

FIG. 14 is a structural diagram of a third embodiment of a terminal in an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

The embodiment of the present invention provides a network selection method, device, and terminal. First, the network architecture involved in the technical solution provided by the embodiment of the present invention is introduced. FIG. 1 describes the structure of the network architecture, including:

The terminal 101 has accessed the current access network 102, and since the terminal 101 can access the EPC network through different access technologies, the number of current access networks 102 may be multiple;

The access anchor point 103 is the anchor point when the terminal switches between different access networks; the access anchor point may be a packet data gateway (PGW: PDN GW) in the EPC network;

The target access network 104 is an access network that the terminal 101 is not currently connected to. Since there are multiple networks in the real environment, there may be multiple target access networks;

Wherein the current access network 102 and the target access network 104 include not only the access network, but also other network elements that each access network accesses to the access anchor point, and the other network elements may be an interface of the access network Ingress gateways, such as serving gateway (SGW) in EPC network, evolved packet data gateway (ePDG), etc.;

The network discovery and selection functional entity 105 is a functional entity that performs network discovery and selection functions, and may be an ANDSF entity in the EPC network;

There may be an E1 interface between the network discovery and selection functional entity 105 and the terminal 101, and the E1 interface may specifically be the S14 interface in the 3GPP architecture, and the network discovery and selection functional entity 105 may send the network discovery and selection strategy to the terminal 101 through the E1 interface ;

There may be an interface E2 between the network discovery and selection functional entity 105 and the terminal 101, the access anchor point 103, the current access network 102, or the target access network 104, and the network discovery and selection functional entity 105 may acquire mobility through the E2 interface protocol information.

Further, the network architecture applied in the embodiment of the present invention may also include a policy control functional entity, and an E2 interface may exist between the network discovery and selection functional entity and the policy control functional entity, and the network discovery and selection functional entity may also access the policy control function through the E2 interface. The functional (PCRF) entity obtains information of the mobility protocol.

The network architecture used in the embodiment of the present invention is introduced above, and the technical solution provided by the embodiment of the present invention is introduced as follows. First, the network selection method provided by the embodiment of the present invention is introduced. Figure 2 describes the flow of the first embodiment of the network selection method, including :

201. Obtain information about mobility protocols supported by the target access network;

After the terminal enters the coverage of the target access network, the terminal may need to switch to the target access network, so the ANDSF entity can obtain information about the mobility protocols supported by the target access network;

In the embodiment of the present invention, the ANDSF entity obtains the information of the mobility protocol supported by the target access network, mainly in the following two ways:

(1) Acquiring the information of the mobility protocol supported by the target access network according to the configuration information;

(2) Obtain the information of the mobility protocol supported by the target access network from the access gateway control unit of the target access network; specifically, it may be obtained directly from the access gateway control unit of the target access network, or may be controlled by a policy The functional entity is obtained from the access gateway control unit of the target access network.

202. Acquire a mobility protocol used by the terminal when switching to the target access network;

There are four types of mobility protocols used by the terminal when switching to the target access network:

1. The mobility protocol used by the terminal to access the network currently.

Use the mobility protocol used by the terminal in the current access network as the mobility protocol used by the terminal when switching to the target access network, without switching the mobility protocol, so as to ensure the mobility used in the current access network The business carried out by the agreement can maintain continuity.

Among them, the information of the mobility protocol used by the terminal in the current access network is mainly obtained through the access anchor point accessed by the terminal. Assuming that the access anchor point is a PGW, there are mainly the following two methods:

(1) Obtaining the information of the mobility protocol used by the current access network directly from the PGW;

Specifically, the PGW can directly report the information of the mobility protocol used by the current access network to the ANDSF entity; the PGW can actively report the information of the mobility protocol used by the current access network to the ANDSF entity, or it can After the trigger message sent by the entity, the information of the mobility protocol used by the current access network is reported to the ANDSF entity; the PGW communicates with the ANDSF entity through the E2 interface;

The E2 interface protocol may be a Diameter protocol. In order to transmit the information of the mobility protocol used by the terminal in the current access network in the Diameter protocol, a new Diameter protocol message may be used. The new Diameter protocol message may be a mobility protocol. Report the message; it is also possible to extend the existing Diameter protocol message to transmit the information of the mobility protocol used by the terminal in the current access network;

In order to transmit mobility protocol information in the Diameter protocol, a mobility protocol attribute value pair (AVP: AttributeValuePair), such as the mobile protocol type (MobileProtocolType) AVP, can be carried in the above new message or the extended existing message, and the value is The enumerated value can be selected from protocols such as Proxy Mobile IP Protocol Version 6 (PMIPv6), Mobile Internet Protocol Version 4 (MIPv4), Dual Stack Mobile IP Protocol Version 6 (DSMIPv6) and General Packet Radio Service Tunneling Protocol (GTP) ;

(2) Obtain the information of the mobility protocol used by the terminal in the current access network from the PGW through the policy control function entity;

Specifically, the PGW can use the existing 3GPP Gx interface to transfer the information of the mobility protocol used by the terminal to the current access network to the PCRF entity, and the PGW can use the current IP session establishment message in the existing Gx interface. The mobility protocol is passed to the PCRF entity; then the PCRF entity can send the mobility protocol information used by the terminal in the current access network to the ANDSF entity through the E2 interface.

2. Mobility protocols supported by both the terminal and the access anchor point;

In order to obtain the mobility protocol supported by both the terminal and the access anchor point, it is necessary to obtain the information of the mobility protocol supported by the terminal; obtain the information of the mobility protocol supported by the access anchor point; use the information of the mobility protocol supported by the terminal and the access The intersection of the mobility protocols supported by the access anchor point is used as the mobility protocol supported by both the terminal and the access anchor point.

The information of the mobility protocol supported by the terminal may be acquired in the following manner:

(1) Obtain the information of the mobility protocol supported by the terminal according to the configuration method, for example, access the user subscription database, and obtain the information of the mobility protocol supported by the terminal from the user subscription database;

(2) Obtain the information of the mobility protocol supported by the terminal from the terminal, specifically, when the terminal is connected to the ANDSF entity, notify the ANDSF entity of the information of the mobility protocol supported by the terminal through the E2 interface;

The E2 interface protocol here can be the Open Mobile Alliance Device Management (OMADM) protocol. In order to transfer the above-mentioned mobility protocol information in the OMA DM protocol, an OMA DM management object (MO: Management Object) can be carried in the OMA DM protocol. For example, the mobile protocol type list (MobileProtocolTypeList) MO has one or more MobileProtocolType values, and the value of MobileProtocolType is an enumerated value, which can be selected from protocols such as PMIPv6, MIPv4, DSMIPv6, and GTP.

Obtaining the information of the mobility protocol supported by the access anchor can be performed in the following ways:

(1) Obtain the information of the mobility protocol supported by the access anchor according to the configuration method. Specifically, the ANDSF entity can configure the protocol type that the network access anchor can support, so as to obtain the mobility supported by the access anchor Agreement information;

(2) Obtain the information of the mobility protocol supported by the access anchor from the access anchor, and the access anchor may notify the ANDSF entity of the information of the mobility protocol supported by the access anchor through the E2 interface;

The E2 interface protocol here can be the Diameter protocol. In order to transfer the information of the mobility protocol supported by the access anchor point in the Diameter protocol, a pair of new messages can be used, assuming it is a mobility protocol capability query/report message; the ANDSF entity Send a mobility protocol capability query message to query the information of the mobility protocol supported by the access anchor point, and the access anchor point reports the information of the mobility protocol supported by the access anchor point to the ANDSF entity through the mobility protocol capability report message;

In order to transmit the information of the mobility protocol supported by the access anchor point in the Diameter protocol, a mobility protocol list AVP can be carried in the mobility protocol capability report message, such as MobileProtocolTypeList AVP, which can be one or more MobileProtocolType, MobileProtocolType The value is an enumerated value, which can be selected from protocols such as PMIPv6, MIPv4, DSMIPv6, and GTP.

3. Mobility protocols supported by the terminal;

In practical applications, since the access anchor point can usually support all mobility protocols, the mobility protocol supported by the terminal can also be used as the mobility protocol used by the terminal when handing over to the target access network.

The method for obtaining the information of the mobility protocol supported by the terminal is the same as 2;

4. Mobility protocols supported by the access anchor.

In some specific cases, for example, the mobility protocol supported by the terminal cannot be obtained, therefore, the mobility protocol supported by the access anchor point may also be used as the mobility protocol used by the terminal when handing over to the target access network.

The method of obtaining the information of the mobility protocol supported by the access anchor point is the same as 2;

203. Determine whether to initiate network reselection to the target access network according to the information of the mobility protocol supported by the target access network and the mobility protocol used by the terminal when handing over to the target access network.

Specifically, when the mobility protocol supported by the target access network includes the mobility protocol used by the terminal when handing over to the target access network, use the mobility protocol used by the terminal when handing over to the target access network to connect to the target access network. The network initiates network reselection.

When the mobility protocol supported by the target access network does not include the mobility protocol used by the terminal when handing over to the target access network, network reselection is not initiated to the target access network.

Wherein, if the number of mobility protocols used by the terminal when handing over to the target access network is at least two, and the mobility protocols supported by the target access network only include one mobility protocol among the at least two mobility protocols protocol, then directly use the one mobility protocol to initiate network reselection to the target access network.

If the number of mobility protocols used by the terminal when switching to the target access network is at least two, and the mobility protocols supported by the target access network include at least two of the at least two mobility protocols, then it is required Select a mobility protocol from the mobility protocols used by at least two terminals included in the mobility protocols supported by the target access network when handing over to the target access network, and then use the selected mobility protocol to initiate to the target access network Network reselection; wherein, one mobility protocol is randomly selected from at least two mobility protocols, or one mobility protocol can be selected from at least two mobility protocols according to a user's preference or an operator's preference.

The process of initiating network reselection to the target access network may be a process of directly initiating handover of the terminal from the current access network to the target access network.

The process of initiating network reselection to the target access network can also be to issue a policy to the terminal, the policy includes the information of the target access network, and the terminal initiates the handover process to the target access network according to the information of the target access network; in the policy It may further include selected mobility protocol information, and the terminal determines whether to initiate a handover according to the mobility protocol information;

The process of not initiating network reselection to the target access network can end the current process; or issue a policy to the terminal, the policy includes target access network information and mobility protocol information supported by the target network, and the terminal does not initiate the handover process based on the above information ;

In this embodiment, the execution of 201 and 202 has no sequence relationship;

It can be seen from the above that this embodiment can obtain the mobility protocol supported by the target access network, and can obtain the mobility protocol used by the terminal when handing over to the target access network, so that according to the mobility protocol supported by the target access network, Information and the mobility protocol used by the terminal when switching to the target access network determine whether to initiate network reselection to the target access network, which can prevent the terminal from being unable to access the target access network when it is directly switched to the target access network, thereby improving user experience.

FIG. 3 describes the flow of Embodiment 2 of the network selection method provided by the embodiment of the present invention. This embodiment describes the processing flow of the terminal, including:

301. Receive a network discovery and selection policy from a network discovery and selection entity, where the network discovery and selection policy includes information about mobility protocols supported by the target access network acquired by the network discovery and selection entity;

302. Determine whether to initiate network reselection to the target access network according to the mobility protocol supported by the target access network and the mobility protocol supported by the terminal.

Specifically, if the mobility protocol supported by the target access network includes the mobility protocol supported by the terminal, use the mobility protocol supported by the target access network and supported by the terminal to initiate network reselection to the target access network .

If the mobility protocol supported by the target access network does not include the mobility protocol supported by the terminal, no network reselection is initiated to the target access network.

Wherein, if there are at least two mobility protocols supported by the target access network and supported by the terminal, use the mobility protocols supported by the target access network and supported by the terminal to report to the target The step of the access network initiating network reselection includes: selecting a mobility protocol from at least two mobility protocols supported by the target access network and supported by the terminal, and using the selected one mobility protocol to send a message to the target The access network initiates network reselection; specifically, one of the two mobility protocols may be randomly selected, or one of at least two mobility protocols may be selected according to the user's preference.

It can be seen from the above that this embodiment can obtain the mobility protocol supported by the target access network, and can determine whether to initiate network reselection to the target access network according to the mobility protocol supported by the target access network and the mobility protocol supported by the terminal , so as to prevent the terminal from being unable to access the target access network when directly switching to the target access network, which can improve user experience.

FIG. 4 describes the flow of Embodiment 3 of the network selection method provided by the embodiment of the present invention. This embodiment describes the processing flow of the terminal, including:

401. Receive a network discovery and selection policy from a network discovery and selection entity, where the network discovery and selection policy includes information about mobility protocols supported by the target access network acquired by the network discovery and selection entity;

402. Determine whether to initiate network reselection to the target access network according to the mobility protocol supported by the target access network and the mobility protocol used by the terminal on the current access network.

Specifically, if the mobility protocol supported by the target access network includes the mobility protocol used by the terminal on the current access network, use the mobility protocol used by the terminal on the current access network to initiate network reselection to the target access network.

If the mobility protocol supported by the target access network does not include the mobility protocol used by the terminal in the current access network, do not initiate network reselection to the target access network;

It can be seen from the above that this embodiment can obtain the mobility protocol supported by the target access network, and determine whether to send the mobile protocol to the target access network according to the mobility protocol supported by the target access network and the mobility protocol used by the terminal in the current access network. Initiating network reselection can prevent the terminal from being unable to access the target access network when it directly switches to the target access network, thereby improving user experience.

Fig. 5 describes the signaling process of Embodiment 4 of the network selection method provided by the embodiment of the present invention. In this embodiment, the multimode terminal used by the user supports 3GPP access and trusted non-3GPP access (trustednon-3GPP access) Access to untrusted non-3GPP access (untrusted non-3GPP access), where the trusted non-3GPP access network can be a WiMax network, and the untrusted non-3GPP access network can be a WiFi network; the WiFi network is in the presence of business preferred network for . The access network currently accessed by the terminal is a WiMax network, and the mobility protocol used is MIPv4.

501. The UE accesses the EPC through the access gateway of the WiMax network, and performs services through the WiMax network; the mobility protocol used by the UE on the WiMax network is MIPv4;

502. The ANDSF entity acquires mobility protocol information used by the UE on the WiMax network;

In the embodiment of the present invention, the ANDSF entity obtains the mobility protocol information used by the UE in the WiMax network in the following manner:

(1) The PGW directly reports to the ANDSF entity, and the PGW can send the mobility protocol information used by the UE in the WiMax network to the ANDSF entity through the E2 interface;

Among them, in addition to reporting the mobility protocol used by the UE in the WiMax network, the PGW can also report the UE identity to the ANDSF entity;

(2) The PGW reports the mobility protocol information used by the UE in the WiMax network to the ANDSF entity through the PCRF entity; the PGW can use the existing Gx interface of 3GPP to pass the mobility protocol used by the UE in the WiMax network to the PCRF entity, and the PCRF entity Notify the ANDSF entity of the mobility protocol information used by the UE in the WiMax network through the E2 interface;

The PGW can pass the mobility protocol used by the UE on the WiMax network to the PCRF entity in the IP session establishment message of the existing Gx interface;

In addition to reporting the currently used mobility protocol, the PCRF entity can also report the UE identity to the ANDSF entity;

In this embodiment, since the mobility protocol used by the UE on the WiMax network is MIPv4, the ANDSF entity can obtain from the PGW that the mobility protocol used by the UE on the WiMax network is MIPv4.

In addition to the mobility protocol information used by the UE on the WiMax network, the ANDSF entity can further obtain the service information used by the UE on the WiMax network and/or the ability of the access anchor to switch between different protocol protocols. In this embodiment, The anchor point is PGW;

Among them, the ANDSF entity can obtain the service information used by the UE in the WiMax network from the PCRF entity or the AF through the E2 interface, and the service information can include the quality of service (QoS: Quality of Service) level, bandwidth, etc.;

The ANDSF entity can obtain the ability of the PGW to switch between different protocol protocols through the configuration method; the ANDSF entity can also obtain the capability of the PGW to switch between different protocol protocols from the PGW through the E2 interface; among them, the E2 interface protocol can be Adopt the Diameter protocol.

503. The UE moves to a hotspot area covered by a WiFi network;

Specifically, the ANDSF entity can confirm that the UE has entered a hotspot area covered by a WiFi network according to the location information of the UE. Since the WiFi network is the preferred network, the ANDSF entity needs to confirm whether to initiate network reselection to the WiFi network; the location information of the UE can be obtained through Reported by UE, or reported by other network elements such as PGW;

504. The ANDSF entity acquires mobility protocol information supported by the WiFi network;

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

(1) Obtained according to the method of configuration; in this embodiment, the WiFi network is an untrustworthy non-3GPP access network, and the UE can only pass two protocols of PMIPv6 and DSMIPv6 in the untrustworthy non-3GPP access network Access to EPC, therefore, the protocol information supported by the target WiFi network is PMIPv6 and DSMIPv6;

(2) The access gateway control unit of the target access network sends the mobility protocol information supported by the target access network to the ANDSF entity through the E2 interface;

Wherein, the access gateway control unit of the target access network is different according to the target access network, for example, it can be ePDG, SGW, or an access gateway in a non-3GPP network; the access gateway of the WiFi network in this implementation The control unit may be an ePDG.

The E2 interface protocol can be a Diameter protocol. In order to transmit the above mobility protocol information in the Diameter protocol, a pair of new messages can be used, assuming it is a mobility protocol capability query/report message; the ANDSF entity sends a mobility protocol capability query message for query , and the access gateway control unit reports the mobility protocol information used by the target access network to the ANDSF entity through a mobility protocol capability reporting message.

In order to transmit the mobility protocol information supported by the target access network in the Diameter protocol, a mobility protocol list AVP can be carried in the mobility protocol capability report message, such as the MobileProtocolTypeList AVP, and the value is one or more MobileProtocolType, the value of the MobileProtocolType The value is an enumerated value, which can be selected from protocols such as PMIPv6, MIPv4, DSMIPv6, and GTP. In this embodiment, the ePDG reports the PMIPv6 and DSMIPv6 to the ANDSF entity.

Since DSMIPv6 does not require direct support from the access network control unit, in practical applications, DSMIPv6 can be used as the default mobility protocol supported by the target access network, so that no active reporting is required.

(3) The access gateway control unit of the target access network may also report the information of the mobility protocols supported by the target access network to the ANDSF entity through the PCRF entity. The access gateway control unit of the target access network can use the existing 3GPP interface with the PCRF entity to transfer the mobility protocol information supported by the target access network to the PCRF entity, and the PCRF entity can access the target through the E2 interface The mobility protocol information supported by the network is notified to the ANDSF entity.

In this embodiment, the ANDSF entity may acquire the mobility protocol information supported by the WiFi network as PMIPv6 and DSMIPv6.

505. Since the WiFi network does not support MIPv4, the ANDSF entity decides not to initiate network reselection to the WiFi network.

According to the currently used mobility protocol, the ANDSF entity acquires that when the terminal accesses from the target access network, the mobility protocol used is MIPv4; since the target access network WiFi network does not support MIPv4, it does not initiate network reselection to the WiFi network .

It can be understood that 502 only needs to be executed before 505 and will not affect the implementation of this embodiment.

The ANDSF entity can also judge whether to initiate network reselection to the WiFi network according to the service information used by the UE on the WiMax network or the ability of the access anchor to switch between different protocol protocols, for example, the UE does not currently have services on the WiMax network, or The currently used service allows service loss caused by different mobility protocols, so the mobility protocol used by the UE when switching to the WiFi network may not be the protocol used by the UE on the WiMax network. If the access anchor does not support switching between different protocol protocols, the mobility protocol used by the UE when switching to the WiFi network can only be the protocol used by the UE on the WiMax network. In this embodiment, it is assumed that the access anchor point does not support the switching of mobility protocols, or the service used by the UE on the WiMax network does not support the switching of mobility protocols. Initiate network reelection.

Among them, the ANDSF entity can directly initiate network reselection to the WiFi network without making a judgment after obtaining the mobility protocol information supported by the WiFi network, and send the network discovery and selection strategy to the UE. The network discovery and selection strategy includes the target access network information, the target The access network information may be the service set identifier (SSID: Service Set Identifier) of the WiFi network, etc., and the mobility protocol information supported by the WiFi network, which refers to the protocol type supported by the WiFi network in this embodiment, namely PMIPv6 and DSMIPv6; terminal According to the information included in the network discovery and selection policy, it may be determined not to initiate network reselection to the WiFi network, that is, not to execute the handover process. The ANDSF entity can send the network discovery and selection policy to the UE through the S14 interface.

It can be seen from the above that this embodiment can obtain the mobility protocol supported by the WiFi network, and can determine not to initiate network reselection to the WiFi network according to the mobility protocol used by the terminal on the WiMax network, thereby avoiding that the terminal cannot connect to the WiFi network when it switches to the WiFi network. Access to the WiFi network can improve user experience.

Fig. 6 has described the signaling process of the fifth embodiment of the network selection method provided by the embodiment of the present invention. In this embodiment, the user uses a multi-mode terminal that supports 3GPP, trusted non-3GPP access (WiMax network) and untrusted non-3GPP access (WiFi network) access; the WiFi network is the preferred network in the presence of services, the terminal currently accesses the WiMax network for services, and the mobility protocol used in the WiMax network is PMIPv6.

601. The UE accesses the EPC through the access gateway of the WiMax network, and performs services through the WiMax network; the mobility protocol used by the UE on the WiMax network is PMIPv6;

602. The ANDSF entity acquires mobility protocol information used by the UE on the WiMax network;

Refer to 502 for execution. In this embodiment, the ANDSF entity acquires that the mobility protocol used by the UE on the WiMax network is PMIPv6.

603. The UE moves to a hotspot area covered by a WiFi network;

Refer to 503 for execution.

604. The ANDSF entity acquires mobility protocol information supported by the WiFi network;

Refer to 504 for execution. In this embodiment, the mobility protocols supported by the WiFi network acquired by the ANDSF entity are PMIPv6 and DSMIPv6;

605. Since the WiFi network supports PMIPv6, the ANDSF entity determines to initiate network reselection to the WiFi network.

The process of initiating network reselection to the WiFi network may be directly initiating a handover process of switching the UE from the WiMax network to the WiFi network.

It can be understood that 602 only needs to be executed before 605 and will not affect the implementation of this embodiment.

Among them, the ANDSF entity can directly initiate network reselection to the WiFi network without making a judgment after obtaining the mobility protocol information supported by the WiFi network, and send the network discovery and selection strategy to the UE. The network discovery and selection strategy includes target access network information (such as SSID of the WiFi network, etc.), and the mobility protocol information supported by the WiFi network, which refers to the protocol type supported by the WiFi network in this embodiment, that is, PMIPv6 and DSMIPv6; the terminal can determine the information contained in the network discovery and selection strategy according to the information contained in the WiFi network. The network initiates network reselection, that is, performs a handover process. The ANDSF entity can send the network discovery and selection policy to the UE through the S14 interface.

It can be seen from the above that this embodiment can obtain the mobility protocol supported by the WiFi network, and can determine to initiate network reselection to the WiFi network according to the mobility protocol used by the terminal on the WiMax network, so that the terminal can successfully switch to the preferred WiFi network, Can improve user experience.

Fig. 7 has described the signaling process of the sixth embodiment of the network selection method provided by the embodiment of the present invention. In this embodiment, the user uses a multi-mode terminal that supports 3GPP, trusted non-3GPP access (WiMax network) and untrusted non-3GPP access (WiFi network) access; 3GPP network is the preferred network in the presence of services, the terminal currently accesses the WiFi network for services, and the mobility protocol used in the WiFi network is PMIPv6.

701. The UE accesses the EPC through the access gateway ePDG of the WiFi network, and performs services through the WiFi network; the mobility protocol used by the UE on the WiFi network is PMIPv6;

702. The ANDSF entity acquires mobility protocol information used by the UE on the WiFi network;

Refer to 502 for execution. In this embodiment, the ANDSF entity acquires that the mobility protocol used by the UE in the WiFi network is PMIPv6;

703. The UE moves to an area covered by 3GPP;

Specifically, the ANDSF entity can determine that the UE has entered an area covered by 3GPP according to the location information of the UE. Since the 3GPP network is the preferred network, the ANDSF entity needs to confirm whether to initiate network reselection to the 3GPP network; the location information of the UE can be reported through the UE , or reported by other network units such as PGW;

704. The ANDSF entity acquires mobility protocol information supported by the target 3GPP network;

Refer to 504 for execution. In this embodiment, the access gateway control unit of the target access network is SGW; the mobility protocol supported by the ANDSF entity to acquire the 3GPP network is PMIPv6, GTP;

705. The ANDSF entity initiates network reselection to the 3GPP network according to the mobility protocol information supported by the target 3GPP network;

Since the 3GPP network supports PMIPv6, the ANDSF entity can initiate network reselection to the 3GPP network.

Among them, the ANDSF entity can directly initiate network reselection to the 3GPP network without making judgments after obtaining the mobility protocol information supported by the WiFi network, and send the network discovery and selection strategy to the UE. The network discovery and selection strategy includes 3GPP network information and 3GPP network support Mobility protocol information, wherein the 3GPP network information includes the 3GPP network type, and the 3GPP network type can be a mobile country code (MCC), a mobile network code (MNC), an access point name (APN), etc.; in this embodiment, the 3GPP network supports The mobility protocols include PMIPv6 and GTP; the terminal can determine to initiate network reselection to the 3GPP network according to the information contained in the network discovery and selection strategy.

It can be seen from the above that this embodiment can obtain the mobility protocol supported by the 3GPP network, and can determine to initiate network reselection to the 3GPP network according to the mobility protocol used by the terminal on the WiFi network, so that the terminal can successfully switch to the preferred 3GPP network, Can improve user experience.

Fig. 8 has described the signaling process of the seventh embodiment of the network selection method provided by the embodiment of the present invention. In this embodiment, the user uses a multi-mode terminal that supports 3GPP, trusted non-3GPP access (WiMax network) and untrusted non-3GPP access (WiFi network) access, the terminal supports PMIPv6; WiMax network is the preferred network in the presence of services, the terminal currently accesses the WiFi network for services, and the mobility protocol used in the WiFi network is PMIPv6.

801. The UE accesses the EPC through the access gateway ePDG of the WiFi network, and the mobility protocol used by the UE on the WiFi network is PMIPv6;

802. The ANDSF entity acquires mobility protocol information supported by the UE;

In the embodiment of the present invention, the ANDSF entity can obtain the mobility protocol information supported by the UE in the following manner:

(1) Acquisition according to the method of static configuration, for example, the ANDSF entity can access the user subscription database, and obtain the mobility protocol information supported by the UE from the user subscription database;

(2) The UE notifies the ANDSF entity of the mobility protocol information supported by the UE through the E2 interface;

When connecting to the ANDSF entity, the UE can notify the ANDSF entity of the mobility protocol information supported by the UE through the E2 interface;

Among them, the E2 interface protocol can be the OMA DM protocol. In order to transmit the above-mentioned mobility protocol information in the OMA DM protocol, an OMA DM MO can be carried in the OMA DM protocol, such as MobileProtocolTypeList MO, and the value is one or more MobileProtocolType, MobileProtocolType The value of is an enumerated value, which can be selected from protocols such as PMIPv6, MIPv4, DSMIPv6, and GTP;

In this embodiment, the mobility protocol information supported by the UE that the ANDSF entity can obtain is PMIPv6.

Since PMIPv6 does not require direct participation of the UE, in practical applications, PMIPv6 can be used as the mobility protocol supported by the UE by default, and the ANDSF entity can directly obtain that the mobility protocol supported by the UE is PMIPv6.

803. The ANDSF entity acquires mobility protocol information supported by the access anchor, where the access anchor in this embodiment is the PGW;

In the embodiment of the present invention, the ANDSF entity can acquire mobility protocol information supported by the PGW in the following manner:

(1) Obtained according to the method of static configuration, for example, the ANDSF entity can configure the mobility protocol that the PGW of this network can support;

(2) The PGW sends the mobility protocol information supported by the PGW to the ANDSF entity through the E2 interface;

Among them, the E2 interface protocol can be the Diameter protocol. In order to transmit the above-mentioned mobility protocol information in the Diameter protocol, a pair of new messages can be used, assuming that it is a mobility protocol capability query/report message; the ANDSF entity sends a mobility protocol capability query message Query, and the PGW reports the mobility protocol information supported by the PGW to the ANDSF entity through the mobility protocol capability reporting message;

In order to transmit the mobility protocol information supported by the access anchor point in the Diameter protocol, a mobility protocol list AVP, such as MobileProtocolTypeList AVP, can be carried in the above mobility protocol capability report message, and the value can be one or more MobileProtocolType, MobileProtocolType The value of is an enumerated value, which can be selected from protocols such as PMIPv6, MIPv4, DSMIPv6, and GTP;

In this embodiment, the mobility protocol information supported by the PGW that the ANDSF entity can obtain is PMIPv6 and DSMIPv6;

804. The UE moves to an area covered by the WiMax network;

The ANDSF entity can determine that the UE has entered an area covered by a WiMax network according to the UE's location information. Since the WiMax network is the preferred network, the ANDSF entity can determine whether to initiate network reselection to the WiMax network; the UE's location information can be reported by the UE, or Reported by other network units such as PGW;

805. The ANDSF entity acquires mobility protocol information supported by the WiMax network;

Refer to 504 for execution. In this embodiment, the access gateway control unit of the target access network is an access gateway in the WiMax network;

In this embodiment, the mobility protocol that the ANDSF entity can obtain the support of the target WiMax network is DSMIPv6;

806. Since the UE only supports PMIPv6, and the target WiMax network only supports DSMIPv6, the ANDSF entity does not initiate network reselection to the WiMax network;

According to the mobility protocol PMIPv6 supported by the UE, the mobility protocols PMIPv6 and DSMIPv6 supported by the PGW, the ANDSF entity acquires that the mobility protocol used when the terminal switches to the WiMax network is PMIPv6; since the WiMax network does not support PMIPv6, it does not initiate Network reselection.

Wherein, 802 and 803 do not have an execution order, as long as both 802 and 803 are executed before 806, the realization of this embodiment will not be affected.

Among them, the ANDSF entity can directly initiate network reselection to the WiMax network without making a judgment after obtaining the mobility protocol information supported by the WiMax network, and send the network discovery and selection strategy to the UE. The network discovery and selection strategy includes WiMax network information (such as WiMax network ID, etc.) and the mobility protocol information (DSMIPv6) supported by the WiMax network; the terminal can determine not to initiate network reselection to the WiMax network according to the information contained in the network discovery and selection policy.

It can be seen from the above that this embodiment can obtain the mobility protocol supported by the terminal and the access anchor point, so as to obtain the mobility protocol used when the terminal switches to the WiMax network, and can determine not to transfer to the WiMax network according to the mobility protocol supported by the WiMax network. Initiating network reselection prevents the terminal from being unable to access the WiMax network when switching to the WiMax network, which can improve user experience.

Fig. 9 describes the signaling process of the eighth embodiment of the network selection method provided by the embodiment of the present invention. In this embodiment, the user uses a multi-mode terminal that supports 3GPP, trusted non-3GPP access (WiMax network) and untrusted non-3GPP access (WiFi network) access, the terminal supports PMIPv6 and DSMIPv6; WiMax network is the preferred network in the presence of services, the terminal currently accesses the WiFi network for services, and the mobility protocol used in the WiFi network is PMIPv6.

901. The UE accesses the EPC through the access gateway ePDG of the WiFi network, and the mobility protocol used by the UE on the WiMax network is PMIPv6;

902. The ANDSF entity acquires mobility protocol information supported by the UE;

Refer to 802 for execution. In this embodiment, the mobility protocol information supported by the UE that the ANDSF entity can obtain is PMIPv6 and DSMIPv6;

903. The ANDSF entity acquires mobility protocol information supported by the access anchor, where the access anchor in this embodiment is the PGW;

Refer to 803 for execution. In this embodiment, the mobility protocol information supported by the PGW that the ANDSF entity can obtain is PMIPv6 and DSMIPv6;

904. The UE moves to an area covered by the WiMax network;

Refer to 804 for execution.

905. The ANDSF entity acquires mobility protocol information supported by the target WiMax network;

Refer to 805 for execution. In this embodiment, the mobility protocol information supported by the WiMax network acquired by the ANDSF entity is DSMIPv6;

906. Since the WiMax network supports DSMIPv6, initiate network reselection to the WiMax network;

According to the mobility protocols PMIPv6 and DSMIPv6 supported by the UE, and the mobility protocols PMIPv6 and DSMIPv6 supported by the PGW, the ANDSF entity obtains a list of mobility protocols that can be used when the terminal switches to the WiMax network, including PMIPv6 and DSMIPv6. Since the WiMax network supports DSMIPv6, it can Use DSMIPv6 to initiate network reselection to the WiMax network.

Further, the ANDSF entity can also select the mobility protocol used when the terminal switches to the WiMax network from the list of possible mobility protocols according to the preference of the operator or the user; wherein, the ANDSF entity can obtain the operating The preferred mobility protocol; the ANDSF entity can obtain the user's preference through the configuration method, and can also obtain the user's preference from the UE.

Among them, the ANDSF entity can directly initiate network reselection to the WiMax network without making a judgment after obtaining the mobility protocol information supported by the WiMax network, and send the network discovery and selection strategy to the UE. The network discovery and selection strategy includes WiMax network information (such as WiMax network ID, etc.) and mobility protocol information (DSMIPv6) supported by the WiMax network; the terminal can determine to use DSMIPv6 to initiate network reselection to the WiMax network according to the information contained in the network discovery and selection policy.

It can be seen from the above that this embodiment can obtain the mobility protocol supported by the terminal and the access anchor point, so as to obtain the mobility protocol used when the terminal switches to the WiMax network, and can determine to initiate an action to the WiMax network according to the mobility protocol supported by the WiMax network. Network reselection, so that the terminal can successfully switch to the preferred WiMax network, which can improve user experience.

Introduce the network selection device provided by the embodiment of the present invention again. Figure 10 describes the structure of the first embodiment of the network selection device, including:

The acquiring unit 1001 is configured to acquire the information of the mobility protocol supported by the target access network; acquire the mobility protocol used by the terminal when switching to the target access network;

Wherein, the obtaining unit 1001 may include: a first obtaining unit 10011, configured to obtain information on the mobility protocol used by the terminal in the current access network; The mobility protocol used by the current access network is used as the mobility protocol used by the terminal when handing over to the target access network.

The determining unit 1002 is configured to use the information obtained by the acquiring unit 1001 on the mobility protocol supported by the target access network and the terminal used when switching to the target access network acquired by the acquiring unit 1001 (specifically, the first determining unit 10012) The mobility protocol determines whether to initiate network reselection to the target access network.

It can be seen from the above that this embodiment of the network selection device can obtain the mobility protocol supported by the target access network, and can obtain the mobility protocol used by the terminal when handing over to the target access network, so that the mobility protocol supported by the target access network can be obtained according to the The information of the mobility protocol and the mobility protocol used by the terminal when switching to the target access network determine whether to initiate network reselection to the target access network, which can prevent the terminal from being unable to access the target access network when it directly switches to the target access network network, thereby improving user experience.

As shown in FIG. 10 , the first embodiment of the network selection device provided by the embodiment of the present invention may further include an initiating unit 1003, configured to use the terminal obtained by the obtaining unit 1001 when the determining unit 1002 determines to initiate network reselection to the target access network. The mobility protocol used when handing over to the target access network initiates network reselection to the target access network.

Figure 11 describes the structure of Embodiment 2 of the network selection device, including:

The obtaining unit 1101 is configured to obtain information of mobility protocols supported by the target access network; obtain the mobility protocol used by the terminal when switching to the target access network;

Wherein, the acquiring unit 1101 may include: a second acquiring unit 11011, configured to acquire the information of the mobility protocol supported by the terminal and the information of the mobility protocol supported by the access anchor point; the second determining unit 11012, configured to acquire Unit 11011 acquires information about the mobility protocols supported by the terminal and the information about the mobility protocols supported by the access anchor, and determines to use the mobility protocol supported by both the terminal and the access anchor as the terminal to use when handing over to the target access network mobility agreement.

The determining unit 1102 is configured to use the information obtained by the acquiring unit 1101 on the mobility protocols supported by the target access network and the information acquired by the acquiring unit 1101 (specifically, the second determining unit 11012) to use when switching to the target access network. The mobility protocol determines whether to initiate network reselection to the target access network.

The selection unit 1103 is configured to determine in the determination unit 1002 to initiate network reselection to the target access network, and the acquisition unit 1101 (specifically, the second determination unit 11012) acquires the mobility protocol used by the terminal when switching to the target access network When the number of is at least two, select a mobility agreement from at least two mobility agreements;

The initiating unit 1104 is configured to initiate network reselection to the target access network by using a mobility protocol selected by the selecting unit 1103 .

It can be seen from the above that this embodiment of the network selection device can obtain the mobility protocol supported by the target access network, and can obtain the mobility protocol supported by both the terminal and the access anchor point as the mobility protocol used by the terminal when switching to the target access network. Mobility protocols, so that network reselection is initiated to the target access network only when the mobility protocols supported by the target access network include the mobility protocols supported by both the terminal and the access anchor point, thereby preventing the terminal from directly switching to the target access network. When accessing the network, the target access network cannot be accessed, which can improve user experience.

The network selection device provided in the embodiment of the present invention may serve as an ANDSF entity.

Introduce the terminal provided by the embodiment of the present invention again. Figure 12 describes the structure of the first embodiment of the terminal, including:

The receiving unit 1201 is configured to receive a network discovery and selection strategy, where the network discovery and selection strategy includes information about mobility protocols supported by the target access network;

The determining unit 1202 is configured to determine whether to initiate network reselection to the target access network according to the mobility protocol supported by the target access network and the mobility protocol supported by the terminal received by the receiving unit.

It can be seen from the above that this embodiment of the terminal can obtain the mobility protocol supported by the target access network, and can obtain the information of the mobility protocol supported by the target access network and the mobility protocol used by the terminal when switching to the target access network to determine whether to initiate network reselection to the target access network, thereby preventing the terminal from being unable to access the target access network when directly switching to the target access network, and improving user experience.

As shown in Figure 12, the terminal embodiment 1 provided by the embodiment of the present invention may further include:

The initiating unit 1203 is configured to initiate network reselection to the target access network using the mobility protocol supported by the terminal included in the mobility protocol supported by the target access network when the determining unit 1202 determines to initiate network reselection to the target access network .

Figure 13 describes the structure of the second embodiment of the terminal, including:

The receiving unit 1301 is configured to receive a network discovery and selection strategy, where the network discovery and selection strategy includes information about mobility protocols supported by the target access network;

The determining unit 1302 is configured to determine whether to initiate network reselection to the target access network according to the mobility protocol supported by the target access network and the mobility protocol supported by the terminal received by the receiving unit;

The selecting unit 1303 is configured to, when the determining unit 1302 determines to initiate network reselection to the target access network, and the number of mobility protocols supported by the target access network received by the receiving unit 1301 is at least two, the terminal supports the at least two When at least two of the two mobility protocols are selected, select a mobility protocol from the at least two mobility protocols supported by the terminal;

The initiating unit 1304 is configured to initiate network reselection to the target access network by using a mobility protocol selected by the selecting unit 1203 .

It can be seen from the above that, in this embodiment of the terminal, the mobility protocol supported by the target access network can be obtained, so that the mobility protocol included in the mobility protocol supported by the target access network and supported by the terminal can be used to initiate a network transfer to the target access network. reselection, so as to ensure that the terminal can be handed over to the target access network successfully, thereby improving user experience.

Figure 14 describes the structure of the third embodiment of the terminal, including:

The receiving unit 1401 is configured to receive a network discovery and selection strategy, where the network discovery and selection strategy includes information about mobility protocols supported by the target access network;

The determining unit 1402 is configured to determine whether to initiate network reselection to the target access network according to the mobility protocol supported by the target access network received by the receiving unit 1401 and the mobility protocol used by the terminal in the current access network.

It can be seen from the above that in this embodiment of the terminal, the mobility protocol supported by the target access network can be obtained, and it can be determined whether to initiate a network protocol to the target access network according to the mobility protocol supported by the target access network and the mobility protocol supported by the terminal. Reselection can prevent the terminal from being unable to access the target access network when it directly switches to the target access network, thereby improving user experience.

As shown in FIG. 14, the third embodiment of the terminal provided by the embodiment of the present invention may further include an initiating unit 1403, configured to use the terminal's current access network used by the terminal when the determining unit 1402 determines to initiate network reselection to the target access network. The mobility protocol initiates network reselection to the target access network.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be implemented through computer programs to instruct related hardware, and the programs can be stored in a computer-readable storage medium. During execution, it may include the processes of the embodiments of the above-mentioned methods. Wherein, the storage medium may be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM) or a random access memory (Random Access Memory, RAM), etc.

A network selection method, device, and terminal provided by the embodiments of the present invention have been described above in detail, and the descriptions of the above embodiments are only used to help understand the methods and ideas of the present invention; at the same time, for those skilled in the art, According to the idea of the present invention, there will be changes in the specific implementation and scope of application. To sum up, the contents of this specification should not be construed as limiting the present invention.

Claims (19)

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;

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, 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:

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 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;

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

19. 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 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.

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