WO2009009991A1

WO2009009991A1 - A switching method for an isomeric network and devices thereof

Info

Publication number: WO2009009991A1
Application number: PCT/CN2008/071593
Authority: WO
Inventors: Junxiang Guo; Bin Xia; Jing Liu
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2007-07-13
Filing date: 2008-07-09
Publication date: 2009-01-22
Also published as: CN101345993B; CN101345993A

Abstract

A switching method for an isomeric network and devices thereof are provided. The method includes: the current service network of the terminal gets the corresponding relationship information, which is between the point of service and the network point of attachment in the alternate network, the corresponding relationship information is stored in a media independent information server; the current service network of the terminal inquires the resource information of the network point of attachment in the alternate network toward the point of service of the alternate network respectively, according to the corresponding relationship; the current service network of the terminal choices the point of attachment of the aim network according to the inquired resource information, and informs the terminal of switching to the point of attachment of the aim network; or, the inquired resource information is transmitted to the terminal, the terminal choices the point of attachment of the aim network according to the resource information and switches to the point of attachment of the aim network. Using the invention, the network switching can be realized, when the point of service and the point of attachment of network are separated or one point of service corresponds to multiple points of access of the aim network.

Description

Heterogeneous network switching method and device thereof

The present invention relates to the field of wireless communications, and in particular, to a method for heterogeneous network handover, and a terminal, a service node device, and a media independent information server.

Background technique

Under the existing wireless communication technology, mobile users cannot perform roaming and handover under different radio access technologies, in order to solve mobile users in IEEE 802. 3/802.11/802.16/3GPP/3GPP2 systems. Inter-roam switching problem, the IEEE 802 Wireless Working Group established the IEEE 802 Switching Research Group, Handoff ECSG, at the end of 2003. It has been officially named IEEE 802.21 Working Group and is responsible for developing a common switching framework for wired and wireless IEEE 802 standards. (such as IEEE 802. 3, IEEE 802.11 and IEEE 802.16) and 3G standards, the requirements for switching between different standards and the corresponding switching mechanism.

With the evolution of wireless communication technologies, terminals and networks, such as base stations and access points, may be multi-mode, that is, support different wireless standards, and sometimes voice and data transmission can be simultaneously performed on multiple interfaces. Today's mobile communication networks have evolved into micro-cellular (IEEE 802.11, IEEE 802.15) and macro-cellular (3GPP, 3GPP2, IEEE 802.16), which may overlap each other, so handover and network selection It can happen between different types of networks.

The media-independent handover solution in IEEE 802.21 configures a set of handover functions in the mobility management protocol stack of the network element to form a new protocol layer called MIH (Media Independent Handover). ) Protocol layer. The MI H layer protocol stack provides the following services:

(1) MIH Event Service (MIH-ES): Provides event classification, event filtering, and event reporting of dynamically changing events on link characteristics, link status, and link quality.

(2) MIH Command Service (MIH-CS): Provides MIH user management and control of link behavior related to handover and mobility.

(3) MIH Information Service (MIH-IS): Provides details of the service network and surrounding networks and services Detailed information. This information is used for effective system access and handover decisions.

The main function of the MIH layer is to provide media-independent switching functions through event services, command services, and information services. At present, the purpose of the MIH protocol is to use media-independent switching functions. MIH's information service mechanism provides an unprecedented means of understanding the detailed information of neighboring networks. MIH information services enable terminals to know the detailed characteristics of their surrounding networks, such as network types. , network operators, network service providers, high-level services that the network can provide, and information such as QoS (Quality of Service) characteristics, cost, data rate, security, and geographic location of the access network. That is to say, the MIH mechanism provides more policy information for the user to select the network.

In the existing IEEE 802.21, in order to effectively represent the information of the neighbor network in the heterogeneous environment in the TLV (Type/Length/Value) format, three types of containers are defined hierarchically: 4|5 List of Neighboring Access Networks Containers, Access Network Containers, and Network Access Point Containers (PoA Containers). The three containers are categorized by hierarchy. For example, the neighbor access network container list may include several access network containers, and the access network container may include several network access point containers. Table 1, Table 2, and Table 3 show the structure of the above three containers stored in the MIIS Server (Media Independent Information Server, Media Independent Information Server). Table 1: Neighbor Access Network Container List

Table 2: Access Network Containers

Table 3: Network Access Point Containers

In the handover process of the prior art, the handover initiated by the terminal is taken as an example. When the handover is performed, the MN (Mobile Node) first obtains information of some network access points (PoA Containers) from the MI IS server, and then the MN moves to the network. Select the network to initiate the query message (MIH_MN_HO_Candidate- Query, request ), The message carries a list of PoA (Point of Attachment) to be queried. After receiving the message, the PoS (Point of Service) of the service network sends a resource query to the network. The message (MIH_N2N_Query_Resources.reques t ) is sent to the PoS of the candidate network, and the PoS of the candidate network sends the message to the corresponding PoA for resource query. After the resource is queried, the original path is used to respond to the MN request message.

In the process of implementing the present invention, the inventor has found that the prior art has at least the following disadvantages: When the PoS and the PoA are a network entity, the prior art can implement the foregoing switching process, but when the PoS and the PoA are separated or one PoS is present, When multiple PoAs are used, the above switching process will not be implemented. This is because the PoS information is not stored on the MI IS Server. The MN or the PoS of the current serving network cannot obtain the identifier information of the PoS from the MI IS Server. Therefore, in the process of switching from the PoA of the current serving network to the PoA of the target network. The PoS of the service network cannot obtain the information about the PoS to which the PoA of the target network belongs, and thus cannot obtain the network selection decision of the target PoA through the PoS of the target network, and cannot perform message interaction with the PoS of the target network. Complete the network switch. Summary of the invention

The embodiment of the present invention discloses a heterogeneous network handover method, so that the current service network of the terminal can obtain the resource information of the network access point from the service node of the candidate network according to the correspondence relationship between the service node and the network access point. , thereby achieving network switching. The heterogeneous network switching method includes the following steps:

The current service network of the terminal obtains the correspondence relationship information between the service node and the network access point of the candidate network; the correspondence relationship information between the service node and the network access point is stored in the media independent information server; the current service network of the terminal is based on Obtaining the corresponding relationship information, and querying, by the service node of the candidate network, the resource information of the network access point of the candidate network, respectively;

The current service network of the terminal selects a target network access point according to the queried network access point resource information of the candidate network, and notifies the terminal to switch to the target network access point; or, the terminal The current service network sends the queried network access point resource information of the candidate network to the terminal, and the terminal selects a target network access point according to the resource information, and Switching to the target network access point.

The embodiment of the invention also discloses a terminal, the terminal comprising:

a relationship information obtaining module, configured to acquire, from a media-independent information server, correspondence information of a service node and a network access point of the candidate network;

a first resource information acquiring module, configured to send the corresponding relationship information to a current serving network of the terminal, and request to query resource information of a network access point of the candidate network; and receive the current service network of the terminal according to the Corresponding relationship information, resource information of a corresponding network access point queried from a service node of the candidate network;

a network selection module, configured to select a target network access point according to the network access point resource information of the candidate network acquired by the resource information acquiring module;

And a network switching module, configured to perform an operation of switching to the target network access point according to the target network access point selected by the network selection module.

An access point information obtaining module, configured to acquire candidate network access point information from a media independent information server;

a second resource information acquiring module, configured to send the candidate network access point information to a current serving network of the terminal, and request to query resource information of the candidate network access point; and receive a current service network of the terminal Returning resource information of the candidate network access point, where the resource information is that the current service network of the terminal passes the correspondence relationship between the service node and the network access point of the candidate network acquired from the information server, Resource information of the candidate network access point queried by the candidate candidate service node from the candidate network access point;

a network selection module, configured to select a target network access point according to the candidate network access point resource information acquired by the resource information acquiring module;

An embodiment of the present invention further discloses a service node device, where the device includes: a first query request a processing module, a first candidate network query module, and a first switching processing module;

The first query request processing module is configured to receive a candidate network query request sent by the terminal, where the correspondence information of the service node and the network access point of the candidate network acquired by the terminal from the media-independent information server is carried; Receiving resource information of the network access point of the candidate network that is queried by the candidate network query module, and sending the resource information to the terminal;

The first candidate network query module is configured to query, according to the corresponding relationship information acquired by the query request processing module, the resource of the network access point corresponding to the service node by using the service node of the candidate network Information, and sending the queried resource information to the query request processing module;

The first switching processing module is configured to receive a network switching request that is sent by the terminal after selecting a target network access point according to the network access point resource information of the candidate network, and perform a network switching operation.

The embodiment of the present invention further discloses a service node device, where the device includes: a second storage module, a second query request processing module, a second candidate network query module, and a second switch processing module;

The second storage module is configured to store correspondence information between the service node and the network access point, where the corresponding relationship information is obtained by the service node device when registering with the media-independent information server. Corresponding relationship information between the service node and the network access point;

The second query request processing module is configured to receive a candidate network query request sent by the terminal, where the candidate network access point information obtained by the terminal from the media-independent information server is carried, and is used to receive the candidate network query module. Querying resource information of the candidate network access point, and sending the resource information to the terminal;

The second candidate network query module is configured to respectively pass the candidate network access point information acquired from the query request processing module and the corresponding relationship information stored by the storage module, respectively, by using the candidate network The candidate service node corresponding to the access point queries the resource information of the candidate network access point, and sends the queried resource information to the query request processing module;

The second handover processing module is configured to receive a network handover request that is sent by the terminal after selecting the target network access point according to the candidate network access point resource information, and perform a network handover operation. The embodiment of the present invention further provides a service node device, where the device includes: a third correspondence relationship obtaining module, a third candidate network query module, and a third switching processing module;

The third correspondence acquiring module is configured to acquire, from the media-independent information server, correspondence information between the service node of the candidate network and the network access point;

The third candidate network query module is configured to query resource information of the network access point of the candidate network by using the service node of the candidate network according to the correspondence relationship information acquired by the corresponding relationship obtaining module ;

The third handover processing module is configured to select a target network access point according to the network access point resource information of the candidate network that is queried by the candidate network query module, and notify the terminal to the target network access point. Switch.

The embodiment of the present invention further discloses a media-independent information server, where the information server includes: a fourth storage module, configured to store a neighbor access network container list, an access network container, and a network access point container; Storing a network container list or the access network container stores service node identification information corresponding to the access network container;

a fourth query module, configured to receive a query request sent by the terminal or the service node device, where the query request carries the candidate network information; the fourth query module queries the fourth storage module according to the candidate network information Corresponding relationship information between the service node of the candidate network and the network access point, and returning the corresponding relationship information to the terminal or service node device that issues the query request. In the foregoing embodiment of the present invention, the correspondence between the service node and the network access point is stored in the media-independent information server, so that the current service network of the terminal can obtain the corresponding relationship, and when the network is switched, the The corresponding relationship is used to query the resource information of the service access point of the candidate network through the service node of the candidate network as the basis for selecting the target network access point, thereby implementing network switching. Especially in the case where the service node and the network access point are separated, or when one service node corresponds to multiple network access points, network switching can be implemented.

DRAWINGS

1 is a schematic flow chart of Embodiment 1 of the present invention; 2 is a schematic flowchart of Embodiment 2 of the present invention;

3 is a schematic flowchart of Embodiment 3 of the present invention;

4 is a schematic flowchart of Embodiment 4 of the present invention;

FIG. 5 is a structural diagram of a terminal according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a terminal according to an embodiment of the present disclosure;

FIG. 6 is a structural diagram of a terminal according to an embodiment of the present invention;

6A is a schematic diagram of a terminal according to an embodiment of the present invention;

FIG. 7, FIG. 8 and FIG. 9 are schematic diagrams showing the structure of a service node device according to an embodiment of the present invention; FIG. 10 is a schematic structural diagram of an information server according to an embodiment of the present invention.

detailed description

The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

In order to be able to provide the PoS information of the candidate network and the corresponding PoA information to the PoS of the terminal or the service network, the embodiment of the present invention stores the correspondence between the PoS of each candidate network and the PoA of the network in the MI IS server, so that the terminal performs the When the network is switched, the PoA resource information of the candidate network can be queried through the PoS of the candidate network to perform network switching selection, and finally switch to the target network. In particular, when the PoS and the PoA are physically separated or the PoS corresponds to multiple PoAs, the terminal can complete the network handover.

In the embodiment of the present invention, by adding an information element storing a service node identifier to a related container on the MIIS server, the information about the correspondence between the PoS of each candidate network and the PoA of the network is implemented. :

method one

An information unit is added to the access network container on the MI IS server, and the information unit is used to store an identifier of an MIHF (Media Independent Handover Functification) entity (MIH PoS Ident if ier ); MIH PoS Ident if ier is used to identify the MIH PoS node that communicates with the PoA under the access network. The information unit storing the MIH PoS Ident if ier is a single-byte or multi-byte string in which an MIH PoS Ident if ier is stored. Table 4 shows an illustration of adding information elements for storing MIH PoS Ident if ier in the access network container. Table 4

Way two

Adding one or more information units to the neighbor access network container list, and the added information unit is configured to store an MIH PoS Identifier corresponding to the access network container in the neighbor access network container list; each of the added information units The information unit stores an MIH PoS Identifier, and each information unit can correspond to one or more access network containers. Table 5 shows the list of neighbor access network containers. Added an indication of the information unit used to store the MIH PoS Identifier. table 5

Regardless of which of the above methods is used to store the MIH PoS Identifier, the correspondence between PoA and PoS can be reflected.

Embodiment 1

In this embodiment, the network-switching process initiated by the terminal is used as an example to describe that the terminal obtains the correspondence between the PoS of the candidate network and the corresponding PoA from the MI IS server. When the terminal initiates the handover, the PoS of the candidate network is Corresponding relationship information of the corresponding PoA is sent to the PoS (Service PoS) of the service network, The service PoS sends a resource query message to the PoS of the candidate network according to the corresponding relationship, where the PoA list information of the PoS of each candidate network is respectively included, and the queried resource information is sent to the terminal, and the terminal selects the target PoA according to the And the process of switching to the target network.

FIG. 1 is a schematic flowchart of Embodiment 1 of the present invention. In this embodiment, the terminal discovers the candidate network 1 and the candidate network 2 in the network discovery phase, and the terminal selects the target network from the candidate networks to perform the network switching process, and specifically includes the following steps:

Step 101: The terminal sends an information acquisition message (MIH_Get_Information Request) to the MIIS server, and requests information about the candidate network 1 and the candidate network 2. The information of the candidate network 1 and the candidate network 2 is included, and the query may be filtered according to requirements, for example, the network may be included. Type, network operator, service provider, network security, and more.

Step 102: The MIIS server returns a corresponding response message (MIH-Get-Information Response) to the terminal according to the message, where the response message carries related information of the candidate network 1 and the candidate network 2, including: the service node PoS- in the candidate network 1 Cl and related information of the network access points PoA_C11 and PoA-C12 (communication), the service node PoS_C2 in the candidate network 2, and the network access points PoA-C21 and PoA-C22 (communicated) Relevant information, as well as customized query information.

The process by which the MIIS server provides relevant information of the candidate network to the terminal may be:

method one

The MIIS server stores the PoS identifier corresponding to the access network through the MIH PoS Identifier information element in the access network container, as shown in Table 4. In this embodiment, in the access network container of the candidate network 1 (which can serve as an access network), the MIH PoS Identifier information element stores the identifier of the service node PoS-Cl of the candidate network 1, and the PoS-Cl can be associated with the candidate network 1. All PoAs (such as PoA-Cll and PoA-C12) communicate; in the access network container of candidate network 2 (which can serve as an access network), the MIH PoS Identifier information element stores the identity of the service node PoS_C2 of the candidate network 2 The PoS_C2 can communicate with all PoAs (such as PoA_C21 and PoA_C22) in the candidate network 2. In this case, the MIIS server obtains the identifier of the PoS-Cl from the access network container of the candidate network 1 and the candidate network 1 according to the request of the terminal to acquire the related information of the candidate network 1 and the candidate network 2, respectively. Corresponding PoA-Cll, PoA-C12 container identifier, obtaining the PoS-C2 identifier and the corresponding PoA-C21, PoA-C22 container identifier; obtaining the MAC address of each PoA from the corresponding PoA container, Specific information such as location, channel range, etc. The MIIS server will obtain the PoS-Cl identifier and the corresponding PoA-Cll and PoA-C12 information, the PoS-C2 identifier, and the corresponding PoA_C21 and PoA-C22 information. A message (MIH_Ge t _ Inf orma ti on Response ) is sent to the terminal.

Way two

The MIIS server stores the PoS identifier corresponding to each access network in the list through one or more MIH PoS Identifier information units in the neighbor access network container list, as shown in Table 5. In this embodiment, the identifier of the service node PoS_Cl is stored in the MIH PoS Identifier information unit 1, corresponding to the candidate network 1; the identifier of the service node PoS-C2 is stored in the MIH PoS Identifier information unit 1, corresponding to the candidate network 2. PoS-Cl can communicate with all PoAs in candidate network 1, and PoS-C2 can communicate with all PoAs in candidate network 2.

In this case, the MIIS server acquires and candidates from the MIH PoS Identifier information element 1 corresponding to the access network container 1 in the neighbor access network container list according to the request of the terminal to obtain the related information of the candidate network 1 and the candidate network 2. The identifier of the PoS-Cl corresponding to the network 1 is obtained from the MIH PoS Identifier information unit 1 corresponding to the access network container 2, and the identifier of the PoS-C2 corresponding to the candidate network 2 is obtained. The MIIS server obtains the PoA container identifiers in the candidate networks from the access network containers of the candidate network 1 and the candidate network 1, and obtains the PoAs from the corresponding PoA containers (PoA-C11, PoA-C12, PoA_C21, and PoA_C22 containers). Specific information such as MAC address, location, channel range, etc. The MIIS server will obtain the PoS-Cl identifier and the corresponding PoA-Cll, PoA-C12 specific information, the PoS_C2 identifier, and the corresponding PoA_C21 and PoA-C22 specific information, and respond to the message ( MIH_Get_Information Response ) is sent to the terminal.

It can be seen that regardless of the method used, the MIIS server can use the PoS and PoA of the candidate network. The corresponding relationship information is sent to the terminal, so that the terminal can initiate a query request to the PoS of the candidate network, and obtain the resource information of the PoA in the network through the PoS of the candidate network, so as to perform network selection.

Step 103: After receiving the response message returned by the MIIS server, the terminal sends a handover candidate network query message (MIH-MN-HO-Candidate-Query Request) to the service node PoS-S of the current monthly service network, where the message includes PoS_Cl. The identifier and the PoA list (corresponding to the PoA-Cll and PoA-CU address), the PoS-C2 identifier, and the PoA list (corresponding) (including PoA- Information such as the addresses of C21 and PoA-C22).

Steps 104a and 104b, after receiving the query message, the PoS-S of the current serving network sends a network-to-network handover query resource message (MIH-N2N-H0-Query_Resources Request) to the candidate network 1 and the candidate network 2, respectively, requesting a query. The resource information of each PoA in the candidate network 1 and the candidate network 2 is used for target network selection.

The PoS-S sends the query message to the PoS-Cl and the PoS_C2 respectively, and the query message sent to the PoS-Cl carries the PoS-Cl identifier and the PoA list corresponding thereto, and sends the query message to the PoS-C2 of the candidate network 1. It carries the PoS-C2 identifier and the corresponding PoA list.

After receiving the query message, the PoS-Cl queries the PoA-C11 and the PoA-CU in the PoA list for the resource information according to the PoA list. After receiving the query message, the PoS-C2 follows the PoA. The list, using the media-specific messages, respectively queries the PoA-C21 and PoA-C22 in the PoA list for resource information.

Step 105a and step 105b, the candidate network 1 and the candidate network 2 respectively return a network-to-network handover query resource response (MIH_N2N_H0_Query_Resources Response) message to the PoS-S of the service network, where the resource information of the queried PoA is carried.

Step 106: The PoS-S of the service network sends a MIH-MN-HO-Condidate-Query Respose message to the terminal, where the resource information of the PoA in the candidate network 1 and the candidate network 2 is carried.

The terminal performs network selection according to the resource information of the PoA in the candidate network 1 and the candidate network 1. In this embodiment, the terminal selects the Po AC 12 of the candidate network 1 as the target network access point. Step 107: After determining the target network, the terminal sends a handover execution command (MIH-MN-HO-Commit) to the PoS-S of the serving network, indicating that the handover to the candidate network 1 is performed.

Step 108, the service network PoS-S network transmits a handover execution command network (MIH-N2N-H0_Commit) ₀ to candidate network of PoS-Cl 1

Steps 109 to 110: The PoS-Cl of the candidate network 1 returns a corresponding response message (MIH_N2N_H0_Commit) to the PoS-S of the service network, and the PoS-S returns a corresponding response message (MIH-MN-HO-Commit) to the terminal.

Step 111: The upper layer (layer 3 and above) performs the switching process.

Steps 112-115, the terminal and the network perform a handover completion process, including the terminal sending a network-to-network handover complete message to the PoS-Cl of the candidate network 1 (3⁄4011_^1110_(01^1616), ?08_(1 to the PoS_S to send the network to the network The handover complete message (MIH-N2N-H0_Complete); the PoS-S returns a corresponding response message to the PoS-Cl, and the PoS-Cl returns a corresponding response message to the terminal.

Embodiment 2

In this embodiment, the network switching process initiated by the terminal is used as an example to describe that the PoS of each access network obtains the topology relationship between the PoS of the surrounding network and the PoA corresponding to the network from the MIIS server through the registration process, and saves the network. The PoA list of the candidate network is sent to the serving PoS. After receiving the handover initiation message, the service PoS sends a resource query message to the corresponding candidate PoS according to the saved topology relationship between the PoS and the PoA, respectively, where each candidate PoS is included. The list information of the PoA, and the queried resource information is sent to the terminal, and the terminal selects the target network according to the process and switches to the target network.

2 is a schematic flowchart of Embodiment 2 of the present invention. In this embodiment, the terminal discovers the candidate network 1 and the candidate network 2 in the network discovery phase, and the terminal selects the target network from the candidate networks to perform the network switching process, and specifically includes the following steps:

Step 201: The terminal sends an information acquisition message (MIH_Get_Information Request) to the MIIS server, requesting information about the candidate network 1 and the candidate network 2.

Step 202: The MIIS server returns a corresponding response message to the terminal according to the message. (MIH-Get-Information Response), the information about the candidate network 1 and the candidate network 2 in the response message, including: information of the network access points PoA-C11 and PoA-C12 in the candidate network 1, the candidate network 2 Information such as the addresses of the network access points PoA_C21 and PoA_C22.

Steps 203-204: The service network sends an MIH registration message (MIH_Register Request) to the MIIS server. After the registration is successful, the MIIS server returns the topology information of the network around the service network through the MIH registration response message (MIH_Register Response).

All PoS must be registered with the MIIS server each time you start (Power On). Therefore, steps 203-204 and step 201 have no timing requirements.

In this embodiment, the network around the service network includes the candidate network 1 and the candidate network 2. The MIH registration response message includes the identifier of the service node PoS-Cl of the candidate network 1 and the PoA list (corresponding) with which it is communicated (in the list) Including information such as the MAC address of the PoA-Cll and the PoA-CU), the identifier of the service node PoS-C2 of the candidate network 2, and the PoA list (corresponding) with which it corresponds (the list includes the MAC of the PoA-C21 and PoA-C22) Address and other information;), the PoS-S of the service network saves the topology information of these surrounding networks.

The process in which the MIIS server provides the PoS with related information of the surrounding candidate network (the network around the service network in this embodiment includes the candidate network 1 and the candidate network 2) may be:

method one

The MIIS server stores the PoS identifier corresponding to the access network through the MIH PoS Identifier information element in the access network container, as shown in Table 4. In this embodiment, in the access network container of the candidate network 1, the MIH PoS Identifier information element stores an identifier of the service node PoS-Cl of the candidate network 1 (which can serve as an access network), and the PoS-Cl can be associated with the candidate network 1 All PoAs (such as PoA-Cll and PoA-C12) communicate; in the access network container of candidate network 2 (which can serve as an access network), the MIH PoS Identifier information element stores the identity of the service node PoS_C2 of the candidate network 2 The PoS_C2 can communicate with all PoAs (such as PoA_C21 and PoA_C22) in the candidate network 2.

In this case, the MIIS server receives the registration message from the candidate network 1 and the candidate according to the PoS-S registration message. In the access network container of the network 2, the identifier of the PoS-Cl and the container identifier of the PoA-Cl1 and PoA-C12 corresponding thereto are obtained, and the identifier of the PoS-C2 and the corresponding PoA- are obtained. C21, PoA-C22 container identifier; Obtain specific information such as MAC address, location, and channel range of each PoA from the corresponding PoA container. The MI IS server will obtain the PoS-Cl identifier and the corresponding PoA-Cl l and PoA-C12 information, the PoS_C2 identifier, and the corresponding PoA_C21 and PoA-C22 information. A response message is sent to the PoS-S.

Way two

The MI IS server stores the PoS identifier corresponding to each access network in the list by one or more MIH PoS Ident if ier information units in the neighbor access network container list, as shown in Table 5. In this embodiment, the identifier of the service node PoS_Cl is stored in the MIH PoS Ident if ier information element 1, corresponding to the candidate network 1 (which can serve as an access network); and the service node PoS is stored in the MIH PoS Ident if ier information unit 2 - The identifier of C2, corresponding to candidate network 2 (can be used as an access network). PoS-Cl can communicate with all PoAs in candidate network 1, and PoS-C2 can communicate with all PoAs in candidate network 2.

In this case, the MI IS server obtains the PoS_Cl corresponding to the candidate network 1 from the MIH PoS Ident if ier information element 1 corresponding to the access network container 1 in the neighbor access network container list according to the registration message of the PoS-S. The identifier acquires the identifier of the PoS-C2 corresponding to the candidate network 2 from the MIH PoS Ident if ier information unit 2 corresponding to the access network container 2. The MI IS server obtains the PoA container identifiers in the candidate networks from the access network containers of the candidate network 1 and the candidate network 2, respectively, from the corresponding PoA containers (PoA-Cl l, PoA-C12, PoA-C21, PoA- In the C22 container, specific information such as the MAC address, location, and channel range of each PoA is obtained. The identifier of the PoS-Cl that the MI IS server will obtain and the corresponding information of the PoA-Cl l and PoA-C12, the identifier of the PoS-C2, and the corresponding PoA-C21 and PoA-C22. Information is sent to the PoS-S via a registration response message.

It can be seen that the MI IS server can send the correspondence between the PoS and the PoA of the network around the service network to the terminal, regardless of the method.

Step 205: The terminal sends a handover candidate network query (MIH_MN_HO_Candida te_Query Reques t) message to the service node PoS-S of the current serving network, the message includes a list of candidate network access points, and the list includes the network access points PoA-Cl l, PoA-C12, PoA-C21 obtained through step 202, PoA-C22 information.

Step 206a and step 206b, after receiving the query message, the PoS-S of the service network obtains the topology information of the surrounding network obtained and saved according to steps 203-204, and obtains that the service node corresponding to PoA-Cl1 and PoA-C12 is PoS_Cl, the service node corresponding to PoA_C21 and PoA_C22 is PoS_C2, and respectively sends a network-to-network handover to the PoS-Cl of the candidate network 1 and the PoS_C2 of the candidate network 2 according to the identifier of the PoS-Cl and the identifier of the PoS-C2, respectively. The query resource (MIH_N2N_H0_Query_Resources Reques t ) message requests to query the resource information of each PoA in the candidate network 1 and the candidate network 2 to perform target network selection.

The PoS-S carries the PoS-Cl identifier and the corresponding PoA list in the query message sent to the PoS-Cl, and the PoS-C2 identifier message sent to the candidate network 1 carries the PoS-C2 identifier and corresponds thereto. List of PoAs.

After receiving the query message, the PoS-Cl queries the PoA-Cl l and the PoA-C12 in the PoA list according to the PoA list, and uses the media-specific message to query the resource information. After receiving the query message, the PoS-C2 follows the PoA. A list that uses the media-specific messages to query resource information for PoA-C21 and PoA-C22 in the PoA list.

Step 207a and step 207b, the candidate network 1 and the candidate network 2 respectively return a network-to-network handover query resource response (MIH-N2N-H0-Query_Resources Responence) message to the PoS-S, where the resource information of the queried PoA is carried.

Step 208: The PoS-S of the serving network sends a MIH-MN-HO-Condida te-Query Res pose message to the terminal, where the resource information of the PoA in the candidate network 1 and the candidate network 2 is carried.

The terminal performs network selection according to the resource information of the PoA in the candidate network 1 and the candidate network 1. In this embodiment, the terminal selects the Po A-C 12 of the candidate network 1 as the target network access point.

Step 209: After determining the target network, the terminal sends a handover execution command to the PoS-S of the service network. (MIH-MN-HO-Commit), indicating that you want to switch to candidate network 1.

Step 210, the service network PoS-S network transmits a handover execution command network (MIH-N2N-H0_Commit) ₀ to candidate network of PoS-Cl 1

Steps 211 to 212: The PoS-Cl of the candidate network 1 returns a corresponding response message (MIH_N2N_H0_Commit) to the PoS-S of the serving network, and the PoS-S returns a corresponding response message (MIH-MN-HO-Commit) to the terminal.

Step 213: The high layer (layer 3 and above) performs a switching process.

Steps 214 to 217, the terminal and the network perform a handover completion process, including the terminal sending a network-to-network handover complete message to the PoS-Cl of the candidate network 1 (3⁄4011_^1110_(01^1616), ?08_(1 to the PoS_S to send the network to the network The handover complete message (MIH-N2N-H0_Complete); the PoS-S returns a corresponding response message to the PoS-Cl, and the PoS-Cl returns a corresponding response message to the terminal.

Embodiment 3

In this embodiment, the network switching process initiated by the network side is taken as an example, and the current service network of the terminal obtains the correspondence between the PoS and the PoA of the candidate network from the MIIS server. When the handover is initiated, the PoS of the obtained candidate network is obtained. The PoA correspondence information is sent to the PoS of the candidate network to query the corresponding PoA resource information, and the target network is notified to notify the terminal of the network handover process according to the queried PoA resource information.

Referring to FIG. 3, it is a schematic flowchart of Embodiment 3 of the present invention. In this embodiment, the service network discovers the candidate network 1 and the candidate network 2 in the network discovery phase, and the service network selects the target network from the candidate networks to notify the terminal of the network handover process, and the specific steps include:

Step 301: The service node PoS-S of the current service network of the terminal sends a MIH-Get-Information Request message to the MIIS server, and requests information about the candidate network 1 and the candidate network 2.

Step 302: The MIIS server returns a corresponding response message (MIH-Get-Information Response) to the PoS-S according to the message, where the response message carries related information of the candidate network 1 and the candidate network 2, including: the service node in the candidate network 1 PoS-Cl and its corresponding network access The information about the points PoA_C11 and PoA-C12, the information about the service node PoS_C2 in the candidate network 2, and the corresponding network access points PoA_C21 and PoA-C22.

The process of the MIIS server providing the related information of the candidate network to the PoS-S is similar to the corresponding process in the first embodiment, and may also include two modes, and details are not described herein again.

Step 303: After receiving the response message returned by the MIIS server, the PoS-S sends a handover candidate network query message (MI H _MN_ HO _ Cand i da te _ Que ry Reque st ) to the terminal, where the message includes the PoS-C 1 identifier. And the corresponding PoA list (including the information of the PoA-Cll and PoA-CU addresses in the list), the PoS-C2 identifier and the corresponding PoA list (the list includes the addresses of PoA-C21 and PoA-C22). And other information).

Step 304: The terminal returns a corresponding response message (MIH_MN_HO_Candidate_Query Response) to the PoS-S.

Step 305a and step 305b, PoS-S respectively send a network-to-network handover query resource message (MIH_N2N_H0_Query_Resources Request) to the candidate network 1 and the candidate network 2, requesting to query resource information of each PoA in the candidate network 1 and the candidate network 2, so as to Make a target network selection.

Step 306a and step 306b, the candidate network 1 and the candidate network 2 respectively return a network-to-network handover query resource response (MIH_N2N_H0_Query_Resources Response) message to the PoS-S of the service network, where the resource information of the queried PoA is carried.

The PoS-S performs network selection according to the resource information of the PoA in the candidate network 1 and the candidate network 2. In this embodiment, the PoS_S selects the PoA_Cl 2 of the candidate network 1 as the target network access point. Step 307: After determining the target network, the PoS-S sends a handover execution command (MIH-N2N-H0_Commit) to the PoS-Cl of the candidate network 1, indicating that the terminal is to be handed over to the candidate network 1.

Step 308: The PoS-Cl of the candidate network 1 returns a corresponding response message (MIH-N2N-H0_Commit) to the PoS-S of the service network, indicating that the handover request is accepted.

Step 309 - 310: The PoS-S sends a handover execution command (MIH-NET-HO-Commit) to the terminal, instructing the terminal to switch to the candidate network 1, and the terminal returns a corresponding response message to the PoS-S of the service network (MIH-NET- HO-Commit).

Step 311: The upper layer (layer 3 and above) performs a switching process.

Steps 312-315: The terminal and the network perform a handover completion process, including the terminal sending a network-to-network handover complete message to the PoS-Cl of the candidate network 1 (3⁄4011_^1110_(01^1616), ?08_(1 to the PoS_S to send the network to the network The handover complete message (MIH-N2N-H0_Complete); the PoS-S returns a corresponding response message to the PoS-Cl, and the PoS-Cl returns a corresponding response message to the terminal.

Embodiment 4

In this embodiment, the network switching process initiated by the network side is used as an example to describe the correspondence between the PoS and the PoA that the current service network of the terminal obtains from the MIIS according to the registration process of the service network. Corresponding relationship information between the PoS and the PoA of the network, respectively, sends a resource query message to the PoS of the candidate network, requests to query the corresponding PoA resource information, and selects a process in which the target network notifies the terminal to perform network switching according to the queried PoA resource information.

4 is a schematic flowchart of Embodiment 4 of the present invention, and specific steps include:

Steps 401 ~ 402, the service node PoS_S of the service network sends an MIH registration message (MIH_Register Request) to the MIIS server. After the registration is successful, the MIIS server returns the topology information of the network around the monthly service network through the MIH registration response message (MIH.Register Response). .

All PoSs can be registered with the MI IS server each time Power On.

In this embodiment, the network around the service network includes the candidate network 1 and the candidate network 2, and the identifier of the service node PoS-Cl of the candidate network 1 and the PoA list corresponding thereto are included in the MIH registration response message (PoA- is included in the list) Information such as the MAC address of the C11 and PoA-CU), the service section of the candidate network 2 The PoS_C2 identifier and the corresponding PoA list (including the MAC address of PoA_C21 and PoA_C22 in the list), the PoS-S of the service network saves the topology information of these surrounding networks.

The process of providing the information about the surrounding network to the PoS-S by the MI IS server is similar to the corresponding process in the first embodiment, and may also include two modes, and details are not described herein again.

Steps 403 to 415: The PoS-S of the service network finds the candidate network 1 and the candidate network 2 in the network discovery phase, and obtains the service node PoS-Cl of the candidate network 1 according to the correspondence between the PoS and the PoA obtained from the WI IS server during registration. The identifier and the corresponding PoA-C12, PoA-C12 information, the identifier of the service node PoS_C2 of the candidate network 2, and the corresponding PoA_C22, PoA-C22 information, and request the corresponding query to PoS-Cl and PoS-C2 respectively. The PoA resource information is selected according to the queried PoA resource information, and the terminal is notified to perform network switching. This process is similar to steps 303-315 in Figure 3 and will not be described here.

The embodiment of the present invention further provides a terminal structure, a service node device structure, and a media independent information server structure applied to the foregoing process.

FIG. 5A is a schematic structural diagram of a terminal according to an embodiment of the present invention. The terminal may initiate a network handover procedure as described in Embodiment 1. The terminal includes: a relationship information obtaining module 501, a first resource information acquiring module 502, a network selecting module 503, and a network switching module 504.

The relationship information obtaining module 501 is configured to obtain correspondence information between the service node of the candidate network and the network access point from the MI IS server. As shown in FIG. 5A, the relationship information obtaining module 501 includes:

The message sending sub-module 5011 is configured to send a MIH_GET_Informa t ion message to the MI IS server, where the message carries the information of the candidate network;

The message receiving sub-module 5012 is configured to receive the MIH-GET-Information response message returned by the MI IS server, where the message carries the service node identifier of the candidate network and the corresponding network access point MAC address.

The first resource information obtaining module 502 is configured to send the corresponding relationship information acquired by the relationship information acquiring module 501 to the current service network of the terminal, and request to query resource information of the network access point of the candidate network; The service network is based on the above correspondence information, from the candidate network industry The resource information of the corresponding network access point queried by the service node. As shown in FIG. 5A, the first resource information acquiring module 502 includes:

The message sending sub-module 5021 is configured to send an MIH_MN_HO_Cond ida te_Query message to the service node of the current serving network of the terminal, carrying the service node identifier of the candidate network and the corresponding network access point MAC address. Information

The message receiving sub-module 5022 is configured to receive a MIH_MN_HO_Cond i DT_ Query response message returned by the service node of the current serving network of the terminal, and the service node carrying the current service network of the terminal is according to the corresponding relationship, Resource information of a corresponding network access point queried from a service node of the candidate network.

The network selection module 503 is configured to select a target network access point according to the network access point resource information of the candidate network acquired by the first resource information acquiring module 502.

The network switching module 504 is configured to perform an operation of switching to the target network access point according to the target network access point selected by the network selection module 503.

FIG. 6 is a schematic structural diagram of another terminal according to an embodiment of the present invention. The network switching process as described in Embodiment 2 may be initiated by using the terminal. The terminal includes: an access point information obtaining module 511, a second resource information acquiring module 512, a network selecting module 513, and a network switching module 514.

The access point information obtaining module 511 is configured to obtain candidate network access point information from the MIIS server. As shown in FIG. 6A, the access point information obtaining module 511 includes:

The message sending submodule 5111 is configured to send a MIH_GET_Information message to the MIIS server, and carry information of the candidate network.

The message receiving sub-module 5112 is configured to receive the MIH-GET-Information response message returned by the MI IS server, where the message carries the network access point information of the candidate network.

The second resource information obtaining module 512 is configured to send the candidate network access point information to the current serving network of the terminal, and request to query resource information of the candidate network access point; and receive the candidate network connection returned by the current service network of the terminal. Resource information of the inbound point, the resource information is corresponding to the current service network of the terminal according to the correspondence relationship between the service node and the network access point acquired from the MIIS server. The resource information of the candidate network access point queried by the candidate service node from the candidate network access point. As shown

As shown in FIG. 6A, the second resource information obtaining module 512 includes:

The message sending sub-module 5121 is configured to send an MIH-MN-HO-Condida te-Query message to the service node of the current serving network of the terminal, and carry the candidate network access point information;

The message receiving sub-module 5122 is configured to receive the M I H — _ _ HO _ Cond i da t e _ Que r y response message returned by the service node of the current serving network of the terminal, and carry the resource information of the queried candidate network access point.

The network selection module 513 is configured to select a target network access point according to the candidate network access point resource information acquired by the second resource information acquiring module 512;

The network switching module 514 is configured to perform an operation of switching to the target network access point according to the target network access point selected by the network selection module 513.

FIG. 7 is a schematic structural diagram of a service node device according to an embodiment of the present invention. The service node device is applicable to the network handover process according to the first embodiment, where the service node device includes: a first query request processing module 601, and a first The candidate network query module 602 and the first switch processing module 603.

The first query request processing module 601 is configured to receive a candidate network query request sent by the terminal, where the terminal carries the correspondence relationship information between the service node and the network access point of the candidate network acquired by the terminal from the MI IS server; The resource information of the network access point of the candidate network queried by the candidate network query module is sent to the terminal;

The first candidate network query module 602 is configured to query the resource information of the network access point corresponding to the service node by using the service node of the candidate network according to the foregoing relationship information acquired by the first query request processing module 601, and The queried resource information is sent to the first query request processing module 601;

The first handover processing module 603 is configured to receive, by the terminal, a network handover request sent after the target network access point is selected according to the network access point resource information of the candidate network, and perform a network handover operation.

FIG. 8 is a schematic structural diagram of another service node device according to an embodiment of the present invention. The service node device is applicable to the network handover process according to the second embodiment, where the service node device includes: The storage module 611, the second query request processing module 612, the second candidate network query module 61 3, and the second switch processing module 614.

The second storage module 611 is configured to store correspondence information between the service node and the network access point, where the correspondence information is a service node and a network acquired by the service node device from the MI IS server when registering with the MI IS server. Correspondence information of the access point;

The second query request processing module 612 is configured to receive a candidate network query request sent by the terminal, where the candidate network access point information acquired by the terminal from the MI IS server is carried, and is configured to receive the second candidate network query module 61 3 to query Resource information of the candidate network access point, and sent to the terminal;

The second candidate network querying module 61 3 is configured to respectively pass the candidate corresponding to the candidate network access point according to the candidate network access point information acquired by the second query request processing module and the corresponding relationship information stored by the second storage module The service node queries the resource information of the candidate network access point, and sends the queried resource information to the second query request processing module;

The second handover processing module 614 is configured to receive a network handover request sent by the terminal after selecting the target network access point according to the candidate network access point resource information, and perform a network handover operation.

FIG. 9 is a schematic structural diagram of another service node device according to an embodiment of the present disclosure. The service node device is applicable to the network handover process according to the third or fourth embodiment, where the service node device includes: The module 621, the third candidate network query module 622, and the third switch processing module 623.

a third correspondence acquiring module, configured to acquire, from the MI I S server, correspondence information between the service node of the candidate network and the network access point;

a third candidate network querying module, configured to query resource information of a network access point of the candidate network by using a service node of the candidate network according to the corresponding relationship information acquired by the third correspondence acquiring module;

The third handover processing module is configured to select a target network access point according to the network access point resource information of the candidate network that is queried by the third candidate network query module, and notify the terminal to switch to the target network access point. As shown in FIG. 10, an embodiment of the present invention further provides an MI IS server, where the server includes: a fourth storage module 701 and a fourth query module 702.

The fourth storage module 701 is configured to store a neighbor access network container list, an access network container, and a network access point container. The neighbor access network container list or the access network container stores a corresponding to the access network container. Service node identification information.

When the service node identification information is stored in the neighbor access network container list in the fourth storage module, the neighbor access network container list includes one or more information units for storing the service node identification information, each information unit and one Or the access network container in the list of multiple neighbor access network containers corresponds.

When the service node identification information is stored in the access network container in the fourth storage module, the access network container includes an information unit for storing service node identification information corresponding to the access network container.

The fourth query module 702 is configured to receive a query request sent by the terminal or the service node device, where the query request carries the candidate network information. The fourth query module queries the service node of the candidate network from the fourth storage module according to the candidate network information. Correspondence information of the inbound point, and returning the corresponding relationship information to the terminal or service node device that issues the query request.

In the embodiment of the present invention, the correspondence between the PoS and the PoA is stored in the MI IS server. In the network switching process initiated by the terminal, the terminal obtains the correspondence between the PoS and the PoA stored in the MI IS. And providing the current service network of the terminal, or obtaining the correspondence between the PoS and the PoA by the current service network of the terminal, so that the current service network of the terminal can query the service node of the candidate network according to the corresponding relationship. The resource information of the service access point of the candidate network is provided to the terminal as a basis for selecting the target network access point, and the network switching is implemented. In the network switching process initiated by the network side, the current service network of the terminal acquires the correspondence relationship between the PoS and the PoA stored in the MI IS, and the service node of the candidate network queries the service access point of the candidate network according to the correspondence relationship. The resource information is selected, and the target network access point is selected according to the queried service node resource information, thereby implementing network switching. Especially in the case of a separation of service nodes and network access points, or a service In the case that the node corresponds to multiple network access points, network switching can be implemented by using the embodiment of the present invention. The spirit and scope of the Ming. Thus, it is intended that the present invention cover the modifications and the modifications of the invention

Claims

Claim

A heterogeneous network switching method, comprising:

The current service network of the terminal selects a target network access point according to the queried network access point resource information of the candidate network, and notifies the terminal to switch to the target network access point; or, the terminal The current service network sends the queried network access point resource information of the candidate network to the terminal, and the terminal selects a target network access point according to the resource information, and performs the target network access point to the target network access point. Switch.

The heterogeneous network switching method according to claim 1, wherein the current service network of the terminal obtains the correspondence relationship between the service node and the network access point of the candidate network, including:

The terminal acquires correspondence information between the service node of the candidate network and the network access point from the media-independent information server, and sends the information to the current service network of the terminal.

The heterogeneous network switching method according to claim 2, wherein the terminal obtains correspondence relationship between the service node of the candidate network and the network access point from the media-independent information server. The current service network sent to the terminal includes:

Transmitting, by the terminal, a handover candidate network query message to a service node of the current service network of the terminal, and carrying correspondence information between the service node of the candidate network and the network access point;

The service node of the current service network of the terminal sends the resource information of the network access point of the candidate network to the service node of the candidate network, and sends the resource information to the terminal, respectively, according to the obtained corresponding relationship information. The handover candidate network query response message carries the queried network access point resource information of the candidate network.

The heterogeneous network switching method according to claim 1, wherein the current service network of the terminal obtains the correspondence relationship information between the service node and the network access point of the candidate network, including: The terminal acquires candidate network access point information from a media-independent information server, and sends the information to the current service network of the terminal;

The current service network of the terminal obtains the service node and the network access of the candidate network where the candidate network access point is located according to the correspondence relationship between the service node and the network access point of each network acquired in advance from the information server. Correspondence information of points.

The heterogeneous network switching method according to claim 4, wherein the current service network of the terminal obtains the correspondence relationship between the service node and the network access point of each network in advance from the information server, including:

When the service node of the current service network of the terminal registers with the information server, the information about the correspondence between the service node of each network and the network access point is obtained from the information server.

The heterogeneous network switching method according to claim 1, wherein the current service network of the terminal obtains the correspondence relationship information between the service node and the network access point of the candidate network, including:

The current service network of the terminal acquires correspondence information between the service node of the candidate network and the network access point from the media-independent information server.

The heterogeneous network switching method according to claim 6, wherein the current service network of the terminal acquires correspondence information between the service node of the candidate network and the network access point from the media-independent information server, Includes:

When the service node of the current service network of the terminal discovers the candidate network of the terminal, the information about the candidate network is sent to the information server, and the information server acquires the service node of the candidate network. Corresponding relationship information with the network access point, and sent to the service node of the current service network of the terminal through a corresponding response message;

Or the service node of the current service network of the terminal acquires the correspondence relationship between the service node and the network access point of each network from the information server when the registration is performed; the service node of the current service network of the terminal discovers the terminal And obtaining the correspondence relationship between the service node of the candidate network and the network access point according to the obtained correspondence information between the service node and the network access point of each network.

The heterogeneous network switching method according to claim 1, wherein the current serving network of the terminal queries the service node of the candidate network for the candidate network according to the obtained correspondence relationship information. Network access point resource information, including:

The service node of the current service network of the terminal sends a network-to-network handover query resource message to the service node of the candidate network, and carries the network access point information corresponding to the service node of the candidate network;

The service nodes of the candidate network respectively query the corresponding network access point for resource information, and send the queried resource information to the service node of the current service network of the terminal.

The heterogeneous network switching method according to claim 2 or 6, wherein the terminal or the current serving network of the terminal acquires the service node and the network access point of the candidate network from the information server. Correspondence information, including:

Transmitting, by the terminal or the current service network of the terminal, the information acquired by the information server to the information server, and carrying the candidate network information;

Obtaining, by the information server, the service node identifier information of the candidate network from the corresponding access network container in the information server according to the candidate network information, and acquiring the network access point information from the corresponding network access point container; Or obtaining, according to the candidate network information, the service node identifier information corresponding to the candidate network from the neighbor access network container list in the information server, and acquiring the information from the corresponding access network container and the network access point container. The network access point information of the candidate network; the information server sends the acquired service node identification information of the candidate network and the corresponding network access point information to the terminal or the terminal that sends the information acquisition message Current service network.

The heterogeneous network switching method according to claim 9, wherein the access network container stores service node identification information corresponding to the access network container.

The heterogeneous network switching method according to claim 9, wherein the neighbor access network container list stores one or more service node identification information, and each service node identification information is respectively related to the list. One or more access network containers in the corresponding ones.

12. A terminal, comprising:

a relationship information obtaining module (501), configured to acquire, from a media-independent information server, correspondence information of a service node and a network access point of the candidate network;

The first resource information obtaining module (502) is configured to send the corresponding relationship information to a current serving network of the terminal, and request to query resource information of a network access point of the candidate network; and receive a current service network of the terminal. And the resource information of the corresponding network access point queried from the service node of the candidate network according to the correspondence relationship information;

a network selection module (503), configured to select a target network access point according to network access point resource information of the candidate network acquired by the first resource information acquiring module; and

The network switching module (504) is configured to perform an operation of switching to the target network access point according to the target network access point selected by the network selection module.

1 3, a terminal, comprising:

An access point information obtaining module (511), configured to acquire candidate network access point information from a media independent information server;

a second resource information obtaining module (512), configured to send the candidate network access point information to a current serving network of the terminal, and request to query resource information of the candidate network access point; The resource information of the candidate network access point returned by the service network, where the resource information is a correspondence between the service node of the terminal and the network access point of the candidate network acquired by the information server according to the current service network of the terminal Information, resource information of the candidate network access point queried by the candidate candidate service node from the candidate network access point;

a network selection module (51 3), configured to select a target network access point according to the candidate network access point resource information acquired by the second resource information acquiring module; and

The network switching module (514) is configured to perform an operation of switching to the target network access point according to the target network access point selected by the network selection module.

A service node device, comprising: a first query request processing module (601), a first candidate network query module (602), and a first switch processing module (603); The first query request processing module (601) is configured to receive a candidate network query request sent by the terminal, where the correspondence between the service node and the network access point of the candidate network acquired by the terminal from the media-independent information server is carried. The information of the network access point of the candidate network that is queried by the first candidate network query module is received and sent to the terminal;

The first candidate network query module ( 602 ) is configured to query the network access corresponding to the service node by using a service node of the candidate network according to the correspondence relationship information acquired by the query request processing module Point resource information, and send the queried resource information to the query request processing module;

The first switching processing module (603) is configured to receive a network switching request that is sent by the terminal after selecting a target network access point according to the network access point resource information of the candidate network, and perform a network switching operation.

A service node device, comprising: a second storage module (611), a second query request processing module (612), a second candidate network query module (61 3 ), and a second switch processing module (614) );

The second storage module (611) is configured to store correspondence information between the service node and the network access point, where the corresponding relationship information is when the service node device registers with the media-independent information server. Corresponding relationship information between the service node and the network access point obtained by the server;

The second query request processing module (612) is configured to receive a candidate network query request sent by the terminal, where the candidate network access point information obtained by the terminal from the media-independent information server is carried; The resource information of the candidate network access point queried by the candidate network query module is sent to the terminal;

The second candidate network query module (61 3 ) is configured to use the candidate network access point information acquired from the second query request processing module and the correspondence relationship information stored by the second storage module Querying, by the candidate service node corresponding to the candidate network access point, the resource information of the candidate network access point, and sending the queried resource information to the second query request processing module; The second handover processing module (614) is configured to receive a network handover request that is sent by the terminal after selecting the target network access point according to the candidate network access point resource information, and perform a network handover operation.

A service node device, comprising: a third correspondence acquiring module (621), a third candidate network query module (622), and a third switching processing module (623);

The third correspondence acquiring module (621) is configured to acquire, from the media-independent information server, correspondence information between the service node of the candidate network and the network access point;

The third candidate network query module (622) is configured to query the network connection of the candidate network by using the service node of the candidate network according to the correspondence relationship information acquired by the third correspondence acquiring module. Resource information of the entry point;

The third handover processing module (623) is configured to select a target network access point according to the network access point resource information of the candidate network that is queried by the third candidate network query module, and notify the terminal to The target network access point switches.

17. A media-independent information server, comprising:

a fourth storage module (701), configured to store a neighbor access network container list, an access network container, and a network access point container; the neighbor access network container list or the access network container stores and stores the Accessing the service node identification information corresponding to the network container; and

The fourth query module (702) is configured to receive a query request sent by the terminal or the service node device, where the query request carries the candidate network information, and the fourth query module is configured to use the fourth storage module according to the candidate network information. Querying the correspondence relationship between the service node of the candidate network and the network access point, and returning the correspondence information to the terminal or the service node device that sends the query request.

The information server according to claim 17, wherein the neighbor access network container list in the fourth storage module (701) includes one or more information units for storing the service node identification information. Each information unit corresponds to an access network container in one or more of the neighbor access network container lists.

The information server according to claim 17, wherein the access network container in the fourth storage module (701) includes an information unit for storing a corresponding to the access network container. Service node identification information,