CN101888631B - Method, system and equipment for switching access network - Google Patents

Method, system and equipment for switching access network Download PDF

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Publication number
CN101888631B
CN101888631B CN200910136345.9A CN200910136345A CN101888631B CN 101888631 B CN101888631 B CN 101888631B CN 200910136345 A CN200910136345 A CN 200910136345A CN 101888631 B CN101888631 B CN 101888631B
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CN
China
Prior art keywords
terminal
base station
wimax
switching server
wimax base
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Expired - Fee Related
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CN200910136345.9A
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Chinese (zh)
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CN101888631A (en
Inventor
杨永利
丁志明
树贵明
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Beijing Zhongcai Wyse Education Technology Co ltd
Nantong Yao Cheng Home Textile City Investment Co.,Ltd.
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Huawei Device Co Ltd
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Priority to CN200910136345.9A priority Critical patent/CN101888631B/en
Priority to PCT/CN2010/072635 priority patent/WO2010130198A1/en
Publication of CN101888631A publication Critical patent/CN101888631A/en
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Publication of CN101888631B publication Critical patent/CN101888631B/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/08—Access security
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0066—Transmission or use of information for re-establishing the radio link of control information between different types of networks in order to establish a new radio link in the target network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/02—Buffering or recovering information during reselection ; Modification of the traffic flow during hand-off

Abstract

The embodiment of the invention provides a method for switching an access network. A terminal is a single radio frequency wireless fidelity (WiFi)/worldwide interoperability for microwave access (WiMAX) multi-mode terminal. The switching of the access network is switching from a wireless local area network (WLAN) access network to the WiMAX access network. The method comprises the following steps that: the terminal transmits a switching request to a switching server through the WLAN access network and acquires a switched target WiMAX base station identifier; the terminal and the switching server establish a first tunnel; and the terminal performs a WiMAX network accessing process together with the switching server in the WLAN access network through the first tunnel. The embodiment of the invention also provides a system and equipment for switching the access network. Due to the adoption of the scheme provided by the embodiment of the invention, service interruption time produced by switching of a WiMAX/WiFi multi-mode terminal from the WLAN access network to the WiMAX access network is shortened and user experience is improved.

Description

A kind of changing method of Access Network, system and equipment
Technical field
The present invention relates to moving communicating field, particularly a kind of changing method of Access Network, system and equipment.
Background technology
WiFi (Wireless Fidelity, Wireless Fidelity) is a kind of important wireless local area network technology, and simultaneously also for WiMAX access, WiFi has that cloth net spee is fast, cost is low, bandwidth is higher, use frequency spectrum without mandate, but coverage is little.
WiMAX (Worldwide Interoperability for Microwave Access, micro-wave access global inter communication) be a kind of WiMAX access technology, also be one of third generation wireless communication technology international standard, the whole world has numerous operators to use WiMAX technology building wireless wideband access network.WiMAX has advantages of that coverage is large, but in large coverage, has a lot of users, so average user bandwidth just declines.
Supplementing WiFi as WiMAX, a little less than indoor WiMAX signal or densely populated place use WiFi focus, can overcome the problem of WiMAX average user narrow bandwidth.Therefore, the core network to WiMAX by WiFi network insertion how, and the continuity that guarantees business between WiMAX and two access networks of WiFi while switching, reduce the break period of switching, and becomes urgent problem.
Summary of the invention
The break period of switching from WLAN Access Network to WiMAX Access Network in order to reduce WiMAX, WiFi multimode terminal, improve user's experience, the embodiment of the present invention provides a kind of changing method, system and equipment of Access Network.Described technical scheme is as follows:
The embodiment of the present invention provides a kind of changing method of Access Network, and described method comprises:
Terminal is obtained the target WiMAX Base Station Identification of switching;
Described terminal sends handover request by WLAN Access Network to switching server, carries the sign of target WiMAX base station in described request;
Described terminal and described switching server are set up the first tunnel;
Described terminal authenticates by described the first tunnel and described switching server, is switched in the WiMAX Access Network of sign correspondence of described target WiMAX base station;
Wherein, described terminal authenticates by described the first tunnel and described switching server, is switched in the WiMAX Access Network of sign correspondence of described target WiMAX base station, specifically comprises:
Described terminal is found range by described the first tunnel and described switching server;
Described terminal is carried out user terminal basic capacity SBC by described the first tunnel and described switching server and is consulted, exchanging capability information, and described ability information comprises version and the certification policy of key management PKM agreement;
Described terminal is received after EAP request/identification message, by described switching server, returns to EAP response/identity message to authenticator, the user totem information that comprises described terminal in described EAP response/identity message; Described authenticator sends to the certificate server in WiMAX core net by described user totem information, and described certificate server, according to the described user totem information of receiving, authenticates user;
Described terminal and described certificate server are carried out two-way authentication and are consulted to obtain master session key MSK by described switching server;
Described authenticator receives the MSK that described certificate server sends, and by described switching server and described terminal, consults to obtain master key PMK and the authorization key AK between paired node;
Described authenticator sends to AK the simulation WiMAX base station of switching server;
Described terminal and described simulation WiMAX base station are carried out message encryption cipher key T EK by described the first tunnel and are exchanged;
Described terminal and described simulation WiMAX base station and WiMAX Access Network gateway complete the registration of data path and the foundation of Business Stream through the first tunnel;
Described terminal is opened WiMAX radio frequency, closes WiFi radio frequency, is switched in WiMAX Access Network.
The embodiment of the present invention also provides a kind of changing method of Access Network, terminal is injection Wireless Fidelity WiFi/ micro-wave access global inter communication WiMAX multimode terminal frequently, described switching to from WLAN (wireless local area network) WLAN Access Network is switched to WiMAX Access Network, and described method comprises:
Described terminal is obtained the target WiMAX Base Station Identification of switching;
Described terminal sends handover request by WLAN Access Network to switching server, carries the sign of target WiMAX base station in described request;
Described terminal and described switching server are set up the first tunnel;
Described terminal is found range by described the first tunnel and described switching server;
Described terminal is carried out user terminal basic capacity SBC by described the first tunnel and described switching server and is consulted, exchanging capability information, and described ability information comprises version and the certification policy of key management PKM agreement;
Described terminal is received after EAP request/identification message, by described switching server, returns to EAP response/identity message to authenticator, the user totem information that comprises described terminal in described EAP response/identity message; Described authenticator sends to the certificate server in WiMAX core net by described user totem information, and described certificate server, according to the described user totem information of receiving, authenticates user;
Described terminal and described certificate server are carried out two-way authentication and are consulted to obtain master session key MSK by described switching server;
Described authenticator receives the MSK that described certificate server sends, and by described switching server and described terminal, consults to obtain master key PMK and the authorization key AK between paired node;
Described authenticator sends to AK the simulation WiMAX base station of switching server.
Described terminal and described simulation WiMAX base station are carried out message encryption cipher key T EK by described the first tunnel and are exchanged;
Described terminal and described simulation WiMAX base station and WiMAX Access Network gateway complete the registration of data path and the foundation of Business Stream through the first tunnel;
Described terminal is opened WiMAX radio frequency, closes WiFi radio frequency.
The embodiment of the present invention provides a kind of switched system of Access Network, and described system comprises: terminal and switching server,
Described terminal, for obtaining the target WiMAX Base Station Identification of switching; By WLAN Access Network, to switching server, send handover request, in described request, carry the sign of target WiMAX base station; Set up the first tunnel with described switching server; By described the first tunnel and described switching server, authenticate, be switched in the WiMAX Access Network of sign correspondence of described target WiMAX base station;
Described switching server, for receive the handover request of described terminal transmission by WLAN Access Network, carries the sign of target WiMAX base station in described request; Set up the first tunnel with described terminal; By described the first tunnel and described terminal, authenticate, so that described terminal is switched in the WiMAX Access Network of sign correspondence of described target WiMAX base station;
Wherein, described terminal, specifically for finding range by described the first tunnel and described switching server; By described the first tunnel and described switching server, carry out user terminal basic capacity SBC and consult, exchanging capability information, described ability information comprises version and the certification policy of key management PKM agreement; Receive after the EAP request/identification message of authenticator transmission, by described switching server, return to EAP response/identity message to authenticator, the user totem information that comprises terminal in described EAP response/identity message; At described authenticator, described EAP response/identity message is forwarded to certificate server, described certificate server is authenticated by rear user according to the user totem information in the EAP response/identity message of receiving, carry out two-way authentication and consult to obtain master session key MSK by described switching server with described certificate server; At described certificate server, described MSK is sent to after described authenticator, according to described MSK, and described authenticator consults to obtain master key PMK and the authorization key AK between paired node by described switching server; At described authenticator, described AK is passed to behind the simulation WiMAX base station of switching server, by described the first tunnel, carry out message encryption cipher key T EK with described simulation WiMAX base station and exchange; By described the first tunnel, complete the registration of data path and the foundation of Business Stream with described simulation WiMAX base station and WiMAX Access Network gateway; Open WiMAX radio frequency, close WiFi radio frequency;
Wherein, described switching server, for finding range by described the first tunnel and described terminal; By described the first tunnel and described terminal, carry out SBC negotiation, exchanging capability information, described ability information comprises version and the certification policy of key management PKM agreement; Receive the EAP response/identity message that described terminal sends, and forward EAP response/identity message to described authenticator, the user totem information that comprises terminal in described EAP response/identity message; By described the first tunnel, carry out TEK exchange with described terminal; By described the first tunnel and described terminal, carry out the registration of data path and the foundation of Business Stream.
The embodiment of the present invention also provides a kind of switched system of Access Network, terminal is injection Wireless Fidelity WiFi/ micro-wave access global inter communication WiMAX multimode terminal frequently, described switching to from WLAN (wireless local area network) WLAN Access Network is switched to WiMAX Access Network, and described system comprises: terminal and switching server
Described terminal, for obtaining the target WiMAX base station of switching; By WLAN Access Network, to switching server, send handover request, in described handover request, carry target WiMAX Base Station Identification; Set up the first tunnel with described switching server; By described the first tunnel and described switching server, find range; By described the first tunnel and described switching server, carry out user terminal basic capacity SBC and consult, exchanging capability information, described ability information comprises version and the certification policy of key management PKM agreement; Receive after the EAP request/identification message of authenticator transmission, by described switching server, return to EAP response/identity message to authenticator, the user totem information that comprises terminal in described EAP response/identity message; At described authenticator, described EAP response/identity message is forwarded to certificate server, described certificate server is authenticated by rear user according to the user totem information in the EAP response/identity message of receiving, carry out two-way authentication and consult to obtain master session key MSK by described switching server with described certificate server; At described certificate server, described MSK is sent to after described authenticator, according to described MSK, and described authenticator consults to obtain master key PMK and the authorization key AK between paired node by described switching server; At described authenticator, described AK is passed to behind the simulation WiMAX base station of switching server, and described simulation WiMAX base station is carried out message encryption cipher key T EK by described the first tunnel and is exchanged; By described the first tunnel, complete the registration of data path and the foundation of Business Stream with described simulation WiMAX base station and WiMAX Access Network gateway; Open WiMAX radio frequency, close WiFi radio frequency;
Described switching server, the handover request sending for receive described terminal by WLAN Access Network; Set up the first tunnel with described terminal; Message through the first tunnel is all the simulation WiMAX base station reception on switching server and sends; By described the first tunnel and described terminal, find range; By described the first tunnel and described terminal, carry out SBC negotiation, exchanging capability information, described ability information comprises version and the certification policy of key management PKM agreement; Receive the EAP response/identity message that described terminal sends, and forward EAP response/identity message to described authenticator, the user totem information that comprises terminal in described EAP response/identity message; By described the first tunnel, carry out TEK exchange with described terminal; By described the first tunnel and described terminal, carry out the registration of data path and the foundation of Business Stream.
The embodiment of the present invention provides a kind of injection Wireless Fidelity WiFi/ micro-wave access global inter communication WiMAX multi-mode terminal equipment frequently, and when described terminal is switched to WiMAX Access Network from WLAN (wireless local area network) WLAN Access Network, described terminal equipment comprises:
The first sending module, for obtaining the target WiMAX Base Station Identification of switching, sends handover request by WLAN Access Network to switching server, carries target WiMAX Base Station Identification in described handover request;
First sets up module, for setting up the first tunnel with described switching server;
The first range finder module, for finding range by described the first tunnel and described switching server;
The first negotiation module, consults for carrying out user terminal basic capacity SBC by described the first tunnel and described switching server, exchanging capability information, and described ability information comprises version and the certification policy of key management PKM agreement;
The first request module, receives by described switching server EAP request/identification message that authenticator sends, and by described switching server, returns to EAP response/identity message to authenticator, the user totem information that comprises terminal in described EAP response/identity message;
The first authentication module, for described EAP response/identity message being forwarded to certificate server at described authenticator, described certificate server is authenticated by rear user according to the user totem information in the EAP response/identity message of receiving, carry out two-way authentication and consult to obtain master session key MSK by described switching server with described certificate server;
The first generation module, at described certificate server, described MSK being sent to after described authenticator, according to described MSK, and described authenticator consults to obtain master key PMK and the authorization key AK between paired node by described switching server;
The first Switching Module, for described AK being passed to behind the simulation WiMAX base station of switching server at described authenticator, and described simulation WiMAX base station is carried out message encryption cipher key T EK by described the first tunnel and is exchanged;
The first handover module, for completing the registration of data path and the foundation of Business Stream with described simulation WiMAX base station and WiMAX Access Network gateway by described the first tunnel; After the registration of data path and the foundation of Business Stream, open WiMAX radio frequency, close WiFi radio frequency.
The embodiment of the present invention provides a kind of switching server equipment, and when injection frequency Wireless Fidelity WiFi/ micro-wave access global inter communication WiMAX multimode terminal is switched to WiMAX Access Network from WLAN (wireless local area network) WLAN Access Network, described switching server equipment comprises:
The first receiver module, the handover request sending for receive described terminal by WLAN Access Network;
Second sets up module, for setting up the first tunnel with described terminal;
The second range finder module, for finding range by described the first tunnel and described terminal;
The second negotiation module, for carrying out SBC negotiation by described the first tunnel and described terminal, exchanging capability information, described ability information comprises version and the certification policy of key management PKM agreement;
The second request module, receives the EAP response/identity message that described terminal sends, and forwards EAP response/identity message to described authenticator, the user totem information that comprises terminal in described EAP response/identity message;
The second Switching Module, for described EAP response/identity message being forwarded to certificate server at described authenticator, make described certificate server according to the user totem information in the EAP response/identity message of receiving to user authenticate by, and make described terminal and described certificate server carry out two-way authentication and consult to obtain MSK, and described certificate server sends to described authenticator by described MSK, described terminal consults to obtain master key PMK and the authorization key AK between paired node according to described MSK and described authenticator, make described authenticator described AK be passed to behind the simulation WiMAX base station of switching server, by described the first tunnel, carrying out message encryption cipher key T EK with described terminal exchanges,
The first Registering modules, by described the first tunnel and described terminal and carry out the registration of data path and the foundation of Business Stream with WiMAX Access Network gateway.
The scheme providing by the embodiment of the present invention, injection multimode terminal is frequently from WiFi network is switched to WiMAX network, by complete WiMAX with switching server on WiFi access path, enter network process, reduce the time delay that WiMAX, WiFi multimode terminal switch from WLAN Access Network to WiMAX Access Network, improved user's experience.
Accompanying drawing explanation
Fig. 1 is the method flow schematic diagram that the embodiment of the present invention 1 provides;
Fig. 2 is the method flow schematic diagram that the embodiment of the present invention 2 provides;
Fig. 3 is that the terminal that the embodiment of the present invention 3 provides is switched to the process schematic diagram of WiMAX access from WiFi access;
Fig. 4 is the method flow schematic diagram that the embodiment of the present invention 3 provides;
Fig. 5 is that the terminal that the embodiment of the present invention 3 provides adopts Single-Input Single-Output pattern to obtain target WiMAX base station process schematic diagram;
Fig. 6 is that the terminal that the embodiment of the present invention 3 provides adopts Single-Input Single-Output pattern to obtain another schematic diagram of target WiMAX base station process;
Fig. 7 is that the terminal that the embodiment of the present invention 3 provides adopts two single-shot patterns of receiving to obtain target WiMAX base station process schematic diagram;
Fig. 8 is the system configuration schematic diagram that the embodiment of the present invention 4 provides;
Fig. 9 is the system configuration schematic diagram that the embodiment of the present invention 5 provides;
Figure 10 is the terminal equipment structural representation that the embodiment of the present invention 6 provides;
Figure 11 is the switching server structural representation that the embodiment of the present invention 7 provides.
Embodiment
For making object, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
Embodiment 1
The embodiment of the present invention provides a kind of changing method of Access Network, and referring to Fig. 1, the method comprises:
101: terminal is obtained the target WiMAX Base Station Identification of switching;
102: terminal sends handover request by WLAN Access Network to switching server, in request, carry the sign of target WiMAX base station;
103: terminal and switching server are set up the first tunnel;
104: terminal authenticates by the first tunnel and switching server, be switched in the WiMAX Access Network of sign correspondence of target WiMAX base station.
Wherein, also can first perform step 103 and perform step 102 again, terminal and switching server are first set up the first tunnel, and then terminal sends handover request by the first tunnel of setting up to switching server again.
Wherein, terminal authenticates by the first tunnel and switching server, is switched in the WiMAX Access Network of sign correspondence of target WiMAX base station, specifically comprises:
Terminal is found range by the first tunnel and switching server;
Terminal is carried out user terminal basic capacity SBC by the first tunnel and switching server and is consulted, exchanging capability information, and ability information comprises version and the certification policy of key management PKM agreement;
Terminal is received after EAP request/identification message, by switching server, returns to EAP response/identity message to authenticator, comprises the user totem information of terminal in EAP response/identity message; Authenticator sends to the certificate server in WiMAX core net by user totem information, and certificate server, according to the user totem information of receiving, authenticates user;
Terminal and certificate server are carried out two-way authentication and are consulted to obtain master session key MSK by switching server;
Authenticator receives the MSK that certificate server sends, and by switching server and terminal, consults to obtain master key PMK and the authorization key AK between paired node;
Authenticator sends to AK the simulation WiMAX base station of switching server;
Terminal is carried out message encryption cipher key T EK with simulation WiMAX base station by the first tunnel and is exchanged;
Terminal completes the registration of data path and the foundation of Business Stream with simulation WiMAX base station and WiMAX Access Network gateway through the first tunnel;
Terminal is opened WiMAX radio frequency, closes WiFi radio frequency, is switched in WiMAX Access Network.
Wherein, when switching server is in WiMAX core net, switching server and terminal, after setting up the first tunnel, are set up the second tunnel with the authenticator in WiMAX Access Network; Or switching server is first set up the second tunnel with authenticator, then sets up the first tunnel with terminal.
Wherein, terminal is obtained the target WiMAX Base Station Identification of switching, specifically comprises:
The WiFi access point identity that comprises current connection in handover request;
The WiFi access point identity of the current connection comprising in the handover request that switching server utilizes terminal to send, query candidate target WiMAX Base Station Identification;
If switching server finds at least one candidate target WiMAX Base Station Identification, switching server, according to default selective rule, selects one of them candidate target WiMAX base station as target WiMAX base station; Switching server sends handoff response to terminal, comprises the target WiMAX Base Station Identification of selecting from least one candidate target WiMAX base station in handoff response.
Wherein, terminal is obtained the target WiMAX Base Station Identification of switching, specifically comprises:
The inquiry request that switching server receiving terminal sends by WLAN Access Network, comprises the WiFi access point identity of the current connection of terminal in inquiry request;
Switching server is by the WiFi access point identity of the current connection of terminal in inquiry request, query candidate target WiMAX Base Station Identification;
Switching server returns to terminal by WLAN Access Network by Query Result, if the Query Result that terminal receives is at least one candidate target WiMAX Base Station Identification, terminal is selected a candidate target WiMAX Base Station Identification as target WiMAX Base Station Identification according to default selective rule from Query Result.
Wherein, terminal is obtained the target WiMAX Base Station Identification of switching, specifically comprises:
Terminal is opened WiMAX receiving circuit, intercepts the broadcast that WiMAX base station sends on different frequencies;
Terminal receives after the broadcast of WiMAX base station, and whether the base station that the content judgement from broadcast sends broadcast is the current target WiMAX base station of terminal, if so, by WLAN Access Network, to switching server, sends handover request message; Otherwise, continue to intercept at next frequency the broadcast that WiMAX base station sends.
The method that the embodiment of the present invention provides, injection multimode terminal is frequently from WiFi network is switched to WiMAX network, by complete WiMAX with switching server on WiFi access path, enter network process, reduce the time delay that WiMAX, WiFi multimode terminal switch from WLAN Access Network to WiMAX Access Network, improved user's experience.
Embodiment 2
The embodiment of the present invention provides a kind of changing method of Access Network, terminal is injection Wireless Fidelity WiFi/ micro-wave access global inter communication WiMAX multimode terminal frequently, switch to from WLAN (wireless local area network) WLAN Access Network and be switched to WiMAX Access Network, referring to Fig. 2, the method comprises:
201: terminal is obtained the target WiMAX Base Station Identification of switching;
202: terminal sends handover request by WLAN Access Network to switching server, in request, carry the sign of target WiMAX base station;
203: terminal and switching server are set up the first tunnel;
Wherein, also can first perform step 203 and perform step 202 again, terminal and switching server are first set up the first tunnel, and then terminal sends handover request by the first tunnel of setting up to switching server again.
204: terminal is found range by the first tunnel and switching server;
205: terminal is carried out user terminal basic capacity SBC by the first tunnel and switching server and consulted, exchanging capability information, ability information comprises version and the certification policy of key management PKM agreement;
206: terminal is received after EAP request/identification message, by switching server, returns to EAP response/identity message to authenticator, comprises the user totem information of terminal in EAP response/identity message; Authenticator sends to the certificate server in WiMAX core net by user totem information, and certificate server, according to the user totem information of receiving, authenticates user;
207: terminal and certificate server are carried out two-way authentication and consulted to obtain master session key MSK by switching server;
208: authenticator receives the MSK that certificate server sends, by switching server and terminal, consult to obtain master key PMK and the authorization key AK between paired node; Authenticator sends to AK the simulation WiMAX base station of switching server.
209: terminal is carried out message encryption cipher key T EK with simulation WiMAX base station by the first tunnel and exchanged;
210: terminal completes the registration of data path and the foundation of Business Stream with simulation WiMAX base station and WiMAX Access Network gateway through the first tunnel;
211: terminal is opened WiMAX radio frequency, close WiFi radio frequency.
Wherein, when switching server is in WiMAX core net, switching server and terminal, after setting up the first tunnel, are set up the second tunnel with the authenticator in WiMAX Access Network; Or switching server is first set up the second tunnel with authenticator, then sets up the first tunnel with terminal.
Wherein, before terminal is closed WiFi radio frequency, terminal sends the notification message that switches radio frequency to switching server.
Wherein, simulation WiMAX base station on switching server is received AK or is received that terminal sends after the notification message that switches radio frequency to switching server, switching server sends to connect to home agent and keeps request, so that home agent is received to connect, keeps temporarily for terminal buffers, being sent to the data of terminal after request.
Wherein, terminal and simulation WiMAX base station and WiMAX Access Network gateway, after the first tunnel completes the registration of data path and the foundation of Business Stream, also comprise:
Terminal sends a request message, and request enters idle condition;
Switching server is removed the first tunnel of setting up with terminal.
Wherein, terminal is opened WiMAX radio frequency, after closing WiFi radio frequency, also comprises:
Terminal is searched the target WiMAX base station that target WiMAX Base Station Identification is corresponding, exit from idle status, and execution enters network process fast;
Terminal is obtained Mobile IP Care-of Address, and carries out mobile IP registration.
Wherein, terminal is obtained Mobile IP Care-of Address, and after carrying out mobile IP registration, also comprises:
Terminal sends resource release request to switching server, and request discharges the related resource of WiFi Access Network.
Wherein, terminal also comprises before sending handover request by WLAN Access Network to switching server:
Terminal is searched the switching server of the injection frequency of support, and sets up safe communication port with the switching server finding.
Wherein, terminal is obtained the target WiMAX Base Station Identification of switching, specifically comprises:
The WiFi access point identity that comprises current connection in handover request;
The WiFi access point identity of the current connection comprising in the handover request that switching server utilizes terminal to send, query candidate target WiMAX Base Station Identification;
If switching server finds at least one candidate target WiMAX Base Station Identification, switching server, according to default selective rule, selects one of them candidate target WiMAX base station as target WiMAX base station; Switching server sends handoff response to terminal, comprises the target WiMAX Base Station Identification of selecting from least one candidate target WiMAX base station in handoff response;
If switching server does not find candidate target WiMAX Base Station Identification, in the handoff response that switching server sends to terminal, target WiMAX base station information is empty, so that terminal receives target WiMAX base station information, be after empty handoff response, process ends; Or, in the handoff response that switching server sends to terminal, represent refusal handover request, so that terminal receives after the handoff response that refusal switches, process ends.
Wherein, terminal is obtained the target WiMAX Base Station Identification of switching, specifically comprises:
The inquiry request that switching server receiving terminal sends by WLAN Access Network, comprises the WiFi access point identity of the current connection of terminal in inquiry request;
Switching server is by the WiFi access point identity of the current connection of terminal in inquiry request, query candidate target WiMAX Base Station Identification;
Switching server returns to terminal by WLAN Access Network by Query Result, if the Query Result that terminal receives is sky, terminal process ends; Otherwise terminal is selected a candidate target WiMAX Base Station Identification as target WiMAX Base Station Identification according to default selective rule from Query Result.
Wherein, terminal is obtained the target WiMAX Base Station Identification of switching, specifically comprises:
Terminal is opened WiMAX receiving circuit, intercepts the broadcast that WiMAX base station sends on different frequencies;
Terminal receives after the broadcast of WiMAX base station, and whether the base station that the content judgement from broadcast sends broadcast is the current target WiMAX base station of terminal, if so, by WLAN Access Network, to switching server, sends handover request message; Otherwise, continue to intercept at next frequency the broadcast that WiMAX base station sends.
The method that the embodiment of the present invention provides, injection multimode terminal is frequently from WiFi network is switched to WiMAX network, by complete WiMAX with switching server on WiFi access path, enter network process, reduce the time delay that WiMAX, WiFi multimode terminal switch from WLAN Access Network to WiMAX Access Network, improved user's experience.
Embodiment 3
The time delay of switching from WLAN Access Network to WiMAX Access Network in order to reduce WiMAX, WiFi multimode terminal, improve user's experience, the embodiment of the present invention provides a kind of changing method of Access Network, make to be operated in injection multimode terminal frequently, from WiFi network is switched to WiMAX network, on WiFi access path, enter in advance network process, the terminal in the embodiment of the present invention is WiMAX, the WiFi multimode terminal being operated under single rf-mode, and particular content is as follows:
First describe terminal below and from WiFi access, be switched to the process of WiMAX access, referring to Fig. 2:
Data path when the curve 1 expression terminal shown in Fig. 3 was linked into WiMAX core net by WLAN Access Network originally, be that terminal eats dishes without rice or wine to be connected to the access point of WLAN by WiFi, through the up routing node of WLAN or the Mobile IP home agent that access controller is connected to WiMAX core net.And the curve 2 shown in Fig. 3 represents that terminal is switched to WiMAX Access Network data path afterwards, terminal eats dishes without rice or wine to be connected to WiMAX base station by WiMAX, is connected to the Mobile IP home agent of WiMAX core net through the gateway of WiMAX Access Network.Wherein, here said connection does not refer to connection physically, and refer to the path in topology, may be through one section of the Internet or local exchange network for example, when curve 1 is from WLAN to WiMAX core net in the middle of, curve 1 and curve 2 all may first pass through other routing node of WiMAX core net before arriving home agent.Curve 1 and curve 2 can continue to stretch out after arriving home agent, and a service server on final described terminal and at a distance another one terminal or network communicates.
When terminal is switched to WiMAX Access Network from WLAN Access Network, because terminal is to be operated under single rf-mode, so terminal can be closed WiFi radio frequency and be opened WiMAX radio frequency.Wherein, terminal can first be closed WiFi radio frequency and be opened WiMAX radio frequency again, and this mode is strict Single-Input Single-Output pattern, whenever only has a radio circuit in work; Terminal also can first be opened WiMAX radio frequency and close WiFi radio frequency again, and before closing WiFi radio frequency, WiMAX radio frequency is only listened to work, and this mode is two single-shot patterns of receiving, and also belongs to single Operation mode.The mode of operation of two receipts single-shots can be so that terminal be first intercepted WiMAX signal before decision is switched, so that terminal can judge whether to switch to WiMAX.
No matter be Single-Input Single-Output pattern or two receipts single-shot pattern, if terminal determines to send information by WiMAX radio frequency, just must close WiFi radio frequency, be at least the transmission of forbidding WiFi radio frequency.From terminal, stop by WiFi transceiving data to passing through WiMAX transceiving data process, terminal may be forced to temporary transient interruption with communicating by letter of far-end (service server on another one terminal or network at a distance), the time of this interruption is longer, and it is poorer that user experiences.Wherein, terminal is switched to WiMAX Access Network before can transceiving data, must carry out the access authentication of WiMAX, the authentication of the authenticator (claiming again authenticator) in the WiMAX Access Network in must acceptance pattern 3, and authenticator has been used the certificate server that is arranged in WiMAX core net to authenticate (in fact user's information be arranged in certificate server or its attached database) to terminal; Complete after authentication, terminal also will obtain new IP at WiMAX Access Network and connect, and then just can proceed communication.
If after terminal is switched to WiMAX radio frequency, then carry out the access authentication of WiMAX, the time of communication disruption can be longer.For this reason, the embodiment of the present invention is carried out at WLAN Access Network before the process of WiMAX access authentication is advanceed to switching radio frequency, when WLAN Access Network carries out WiMAX access authentication, communication can continue normally to carry out, after completing WiMAX access authentication, to WiMAX radio frequency, switch again, can shorten like this time of switching terminal and network service interruption after radio frequency, improve user's experience, referring to Fig. 4, the specific implementation process of the method that the embodiment of the present invention is provided is described in detail:
301: terminal is searched and supported injection switching server frequently, and sets up safe communication port with the switching server finding.
Wherein, the method that terminal is searched switching server can have multiple, and such as passing through the address of DHCP protocol discovery switching server, or by the mode of dns resolution, the embodiment of the present invention is not restricted searching the mode of switching server.In addition, if terminal has obtained the address of switching server when initial network entry, this step does not need.
302: terminal sends handover request to switching server on WLAN path, obtains the sign of target WiMAX base station.
Wherein, be operated in the multimode terminal under single rf-mode in the embodiment of the present invention, the access technology of current employing WiFi, is linked into the core net of WiMAX by WLAN Access Network.When meeting certain trigger condition, need to be switched to the access way of WiMAX, be switched to by WiMAX Access Network and be linked into WiMAX core net.Wherein, certain trigger condition in the embodiment of the present invention, can be terminal find WLAN signal a little less than, automatically determine to switch to WiMAX Access Network, or user's active operation is switched to WiMAX Access Network, may be also that network requirement terminal is switched to WiMAX Access Network.
Wherein, terminal is obtained the process of target WiMAX base station, specifically has following several implementation:
(1), referring to Fig. 5, when terminal adopts Single-Input Single-Output pattern, can adopt following Procedure Acquisition target WiMAX base station:
401: terminal sends handover request message through WLAN Access Network to switching server, the WiFi access point identity that comprises the current connection of terminal in this request message, be BSSID (Basic Service Set Identification, basic service set identification), in fact this sign is exactly the MAC Address of WiFi access point.In handover request message, can also comprise user ID.
402: whether switching server is inquired about user to certificate server the authority that is switched to WiMAX Access Network.
Wherein, this step can be carried out also can not carry out direct execution step 403, if do the inspection of carrying out this step, terminal needs to comprise user totem information in handover request, this user ID is NAI (Network Access Identity, the network access Identifier) information that WiMAX requires.NAI is the character string that a content comprises user name and place network name, the similar E-mail address of form, can consult WiMAX related specifications in detail, repeats no more here.Switching server also can be sent out a message to terminal specially and require terminal that user totem information is sended over, and terminal sends user totem information to switching server after receiving this message again.
If switching server is found this user and can not be switched to WiMAX Access Network, to terminal, return to response message refusal handover request.
403: the BSSID information that switching server utilizes terminal to send, to position configuration server lookup candidate target WiMAX base station information.
Wherein, position configuration server stores the available positional information of all WiMAX base station and the positional information of all WiFi access points in present networks.If there is a WiMAX base station, the signal cover of its signal cover WiFi access point that positional information of this WiMAX base station has comprised the current connection of terminal i.e. the positional information of this WiFi access point, and this base station is a candidate target WiMAX base station.
Position configuration server also can directly be stored the relation table of all WiFi access points that each WiMAX base station available in present networks covers, like this, just can be directly sign by WiFi access point find target WiMAX base station, and need not pass through position calculation.
Position configuration server can be a functional module of switching server inside.
404: switching server sends to terminal through WLAN Access Network by the candidate target WiMAX base station of finding in handover request ack message.
Wherein, candidate target WiMAX base station may have a plurality of, terminal can be added default selective rule in handover request, for example in handover request, comprise terminal direction of motion information, so that switching server finds a most suitable target WiMAX base station, for example: terminal is now being moved northward moving from south orientation, can in handover request, add user's the direction of motion, switching server obtains the direction of motion information in the handover request of terminal, can be in the base station selected base station that goes out that side of user movement direction of a plurality of candidate target WiMAX.
(2) referring to Fig. 6, when terminal adopts Single-Input Single-Output pattern, to obtain target WiMAX base station and can also realize in the following way, detailed process is as follows:
501: terminal sends the request message of query aim WiMAX base station to switching server through WLAN Access Network, in this request message, comprise the sign BSSID of the WiFi access point of the current connection of terminal.
502: switching server can cover the WiMAX base station of the WiFi access point coverage of the current connection of terminal by BSSID to position configuration server lookup.
Wherein, switching server is the candidate target WiMAX base station that terminal will be switched by BSSID to such base station, WiMAX base station of the WiFi access point coverage that can cover the current connection of terminal of position configuration server lookup, candidate target WiMAX base station may not have, may have one or more yet, Query Result represents with the sign BSID (Base Station IDentity, the sign of base station) of base station.
503: switching server returns to terminal by Query Result through WLAN Access Network, if result is empty, terminal termination process; Otherwise, perform step 504.
504: terminal is selected a base station BS ID as target WiMAX base station BS ID from Query Result, through WLAN Access Network, to switching server, send handover request, the target WiMAX base station BS ID that comprises selection in this request message, can also comprise the identification information of terminal.
Wherein, while having the BSID of a plurality of candidate target WiMAX base station in Query Result, terminal therefrom selects one by one base station BS ID as target WiMAX base station BS ID, wherein terminal can be selected according to the direction of motion of current terminal, signal power etc., can therefrom select at random one, the embodiment of the present invention is not restricted the mode of select target WiMAX base station yet.
505: switching server is according to user totem information, and whether to certificate server, inquire about this user has authority to use WiMAX access service.Wherein, this step can be carried out also and can not carry out direct execution subsequent step.
506: switching server now also can inquire about whether there is corresponding target WiMAX base station by BSID.This step can be carried out also can not carry out direct execution subsequent step.
Above-mentioned steps 505 and step 506 can be selected to carry out and also can omit the follow-up step of direct execution, and the embodiment of the present invention do not limit sequencing, also can first perform step 506, then perform step 505.
507: switching server returns to switching request response through WLAN Access Network, if user's lack of competence that request is switched is used WiMAX access service, or target WiMAX base station do not exist, in response message, represent this handover request of refusal, otherwise agree to this handover request.
(3) referring to Fig. 7, when terminal adopts two receipts single-shot pattern, can use following method to obtain target WiMAX base station, detailed process is as follows:
601: terminal is opened WiMAX receiving circuit, now terminal continues proper communication on WiFi radio frequency.
Wherein, if terminal is not supported the independent control to WiMAX transmission circuit, can open WiMAX radio circuit, but now WiMAX radio circuit does not send any WiMAX signal yet.
602: terminal is intercepted the broadcast that WiMAX base station sends on different frequencies.
603: terminal receives after the broadcast of WiMAX base station, the content from broadcast judges that whether this base station is the target WiMAX base station of this terminal current business, if so, performs step 604; Otherwise, perform step 602 continuation and intercept at next frequency the broadcast that WiMAX base station sends.
Wherein, terminal receives after the broadcast of WiMAX base station, and the content from broadcast judges whether this base station is the target WiMAX base station of this terminal current business, if terminal is switched to behind this target WiMAX base station, terminal current business can keep continuity.If can not, get back to step 602 and continue on next frequency, to intercept the broadcast of base station, until find a target WiMAX base station.In addition, if can not find target WiMAX base station, flow process finishes, and closes WiMAX receiving circuit.
Wherein, after finding target WiMAX base station, terminal can temporary close WiMAX receiving circuit, with electrical energy saving, to completing after the WiMAX of WLAN Access Network access authentication, opens WiMAX radio frequency again.Terminal also can not closed WiMAX receiving circuit, until complete after the WiMAX of WLAN Access Network access authentication, opens WiMAX radiating circuit again.
604: terminal sends handover request message through WLAN Access Network to switching server, in this request message, comprise the sign BSID of target WiMAX base station, can also comprise the identification information of terminal.
605: whether switching server can be inquired about this user by the user totem information in handover request message has authority to use WiMAX access service.Wherein, this step can be carried out also and can not carry out direct execution subsequent step.
606: whether switching server can exist such base station by the BSID inquiry in handover request message.Wherein, this step can be carried out also and can not carry out direct execution subsequent step.
Above-mentioned steps 605 and step 606 can be selected to carry out and also can omit the follow-up step of direct execution, and the embodiment of the present invention do not limit sequencing, also can first perform step 606, then perform step 605.
607: switching server returns to switching request response through WLAN Access Network, if user's lack of competence that request is switched is used WiMAX access service, or target WiMAX base station do not exist, and in handover request ack message, represents this handover request of refusal; Otherwise, agree to this handover request.
303: terminal and switching server are set up the first tunnel.
Wherein, terminal and switching server are set up a tunnel, for convenience of explanation referred to herein as the first tunnel, switching server is as a virtual WiMAX base station job after the first tunnel is set up, and in the first tunnel, transmitting terminal and switching server is the data of transmitting by R1 interface between virtual base station.
Between terminal and WiMAX Access Network, mutual signaling message directly carries out on link layer (two layers), and the embodiment of the present invention requires terminal pass through WLAN Access Network by handed over service, to carry out the process of WiMAX access authentication mutual on IP layer is three layers, therefore the two layer message of WiMAX access authentication need to be encapsulated among the three-tier message of wlan network transmission, the two layer message that is about to WiMAX transmits as the data of the IP message in wlan network.The concrete tunnel form embodiment of the present invention is not restricted.
Wherein, also can first perform step 303 and perform step 302 again, terminal and switching server are first set up the first tunnel, and then terminal sends handover request by the first tunnel of setting up to switching server again.
304: if need switching server and authenticator can set up the second tunnel.
Wherein, switching server and authenticator are set up a tunnel, for the ease of distinguishing referred to herein as the second tunnel, transmitting virtual base station in the second tunnel, are the data that the R6 interface between switching server and authenticator transmits.
Wherein, when switching server is in WiMAX core net, switching server can with WiMAX Access Network in authenticator set up the second tunnel.When switching server is in WiMAX Access Network, switching server only need to be set up the first tunnel with terminal, and without carrying out this step.
305: the first tunnel that terminal is set up by step 303, with switching server be virtual base station (Ranging) process of finding range.
Wherein, range finding is the first step in the WiMAX access procedure of terminal.
306: the first tunnel that terminal is set up by step 303 and switching server are that virtual base station carries out SBC (Subscriber Station Basic Capability, subscriber station is user terminal basic capacity) consult, exchanging capability information, this information spinner will comprise version, the certification policy of PKM (Privacy Key Management, the key management) agreement of using in WiMAX network.
Wherein, terminal sends said SBC request message in WiMAX standard to switching server, and then switching server returns to SBC response message to terminal; SBC negotiation betided on eating dishes without rice or wine of terminal and base station alternately originally, now mutual in the first tunnel between terminal and switching server.
Wherein, in SBC request message, comprise the various parameter informations of terminal request, comprise PKM version, certification policy, Physics parameter, terminal up-downgoing modulation system etc.In this step of the embodiment of the present invention, terminal only need in SBC request message, comprise terminal now must request parameter authentication protocol version, certification policy.Certainly, terminal also can send the SBC request message that comprises all parameter informations, and then switching server is ignored the unwanted parameter information of terminal, or switching server response terminal all parameter informations of asking, but the no information of terminal disregards.
Switching server can obtain the information such as protocol version of using in WiMAX network alternately with WiMAX authenticator, also can from pre-configured tables of data, obtain, how the embodiment of the present invention knows that for handed over service implement body the protocol version information that WiMAX authenticator and/or WiMAX base station are supported is not restricted, and passing through the mutual of step 302, switching server has been known these information.
307: authenticator sends EAP request/identification message to terminal by switching server, comprises the identification information of terminal in this message; Terminal is received after EAP request/identification message, by switching server, to authenticator, sends EAP response/identity message, comprises the NAI (Network Access Identifier, network access Identifier) of terminal in message.
Terminal is received after EAP request/identification message, to authenticator, return to EAP response/identity message, the NAI that comprises terminal in EAP response/identity message, NAI is one and comprises user name and place network name, the character string of the similar E-mail address of form (username@realm), can consult WiMAX related specifications in detail, repeat no more here.Therefore because the effect of EAP relaying is served as in base station in EAP verification process, from virtual base station, be sent to authenticator, and the authenticator EAP message that is sent to virtual base station has all been packaged into the form (EAP_Transfer) of EAP relaying.Authenticator can be given certificate server after by protocol encapsulation such as RADIUS the identifier of terminal response.
308: terminal and authenticator carry out EAP verification process.
Wherein, authenticator is received after the EAP response/identity message that terminal sends by switching server, EAP response/identity message is forwarded to certificate server, the NAI that authenticator also can for example comprise the content comprising in EAP response message in EAP response/identity message takes out, and issues certificate server after using other protocol encapsulation; Certificate server is received after NAI, and terminal use is carried out to certification work.
309: after the EAP authentication success of terminal and authenticator, authenticator can send to terminal after by switching server relaying by authentication success EAP-Success message.
310: certificate server and terminal are carried out two-way authentication and consulted to obtain MSK (Master Session Key, master session key); The MSK that authenticator sends according to certificate server and terminal consult to obtain PMK (Pairwise Master Key, the in pairs master key between node) and AK (Authorization Key, authorization key); Authenticator passes to the simulation WiMAX base station on switching server by AK; Terminal and switching server carry out TEK (Traffic Encryption Key, message encryption key) three-way handshake process.
Wherein, certificate server and terminal consult also to obtain EMSK (Extended Master Session Key, extended master session key), and EMSK is as the use of expansion; Certificate server passes to authenticator MSK, and EMSK is retained on certificate server.According to 802.16e agreement, terminal and authenticator are used MSK, produce a PMK.And terminal and HAAA produce mobile key according to EMSK.
PMK generates on MSK basis, and as the master key between authenticator and terminal, when terminal base station shifting, PMK can remain unchanged; AK produces on PMK basis, is the key between terminal and base station, and terminal need to produce new AK while switching target WiMAX base station.It should be noted that authenticator receives MSK there from certificate server, and MSK calculates in terminal and certificate server arranging key process, terminal and authenticator should have identical MSK, otherwise both sides consult the process of PMK will be failed.
At embodiment of the present invention verification process, switching server has been simulated the behavior of base station, and authenticator should send to AK the simulation WiMAX base station on switching server.
Wherein, TEK three-way handshake process is comprised of three message, is first that switching server sends a TEK challenge message to terminal, and terminal sends a TEK request message to switching server afterwards, and last switching server returns a TEK response message again.Mutual by these three message, in fact completed the two-way authentication between terminal and switching server, this is to carry out on the basis based on AK, if the simulation WiMAX base station on switching server does not have identical AK with terminal, cannot complete TEK handshake procedure.
311: the simulation WiMAX base station on switching server by the first tunnel and terminal and mutual by the second tunnel and WiMAX Access Network gateway, has completed the registration of data path and the foundation of Business Stream respectively.
312: terminal sends a request message, enter idle Idle mode of operation.
Wherein, this step is for terminal is switched to WiMAX radio frequency, finds real target WiMAX base station and prepares.
313: the tunnel between dismounting terminal and switching server and the tunnel between switching server and authenticator.
Wherein, if do not set up the tunnel between switching server and authenticator in 304, now do not need to remove.
314: terminal sends link by switching server to home agent and keeps request, home agent is just temporarily sent to the data of terminal after receiving this request for terminal buffers.
Wherein, terminal sends link by switching server to home agent and keeps request, for notifying home agent terminal will carry out switching, can have of short duration interruption, and home agent is just temporarily sent to the data of terminal after receiving this request for terminal buffers.In addition, switching server can also directly send to connect to home agent and keep request, and notice home agent terminal will be carried out switching.
315: terminal is opened WiMAX radio frequency, close WiFi radio frequency.
Now, terminal is switched to WiMAX Access Network.
316: terminal scanning selected target WiMAX base station, exit Idle pattern, carry out and enter fast network process.
317: terminal starts to obtain CoA (Care of Address, Mobile IP Care-of Address) address and carries out MIP (Mobile IP, Mobile IP) registration.
Wherein, because WiMAX supports PMIP and two kinds of MIP technology of CMIP, the IP address acquisition mode of two kinds of MIP is slightly different, if PMIP adopts dhcp process, the CoA of FA is registered to HA upper, binds with HoA; If CMIP is used MIP message to obtain the CoA of terminal, and it is upper that CoA is registered to HA, binds with HoA;
318: terminal sends resource release request to switching server, requirement discharges the related resource of WiFi access network.
So far, terminal has just completed all switch operatings, can be operated on WiMAX channel, and terminal also can send message to Correspondent Node by WiMAX Access Network, carries out data communication, i.e. the state of Fig. 2 curve 2.
The specific embodiment that above-mentioned flow process just provides for convenient understanding, as the restriction to the embodiment of the present invention.
The method that the embodiment of the present invention provides, injection multimode terminal is frequently from WiFi network is switched to WiMAX network, by complete WiMAX with switching server on WiFi access path, enter network process, reduce the time delay that WiMAX, WiFi multimode terminal switch from WLAN Access Network to WiMAX Access Network, improved user's experience.
Embodiment 4
The embodiment of the present invention provides a kind of switched system of Access Network, and referring to Fig. 8, this system comprises: terminal 701 and switching server 702,
Terminal 701, for obtaining the target WiMAX Base Station Identification of switching; By WLAN Access Network, to switching server 702, send handover request, in request, carry the sign of target WiMAX base station; Set up the first tunnel with switching server 702; By the first tunnel and switching server 702, authenticate, be switched in the WiMAX Access Network of sign correspondence of target WiMAX base station;
Switching server 702, for the handover request sending by WLAN Access Network receiving terminal 701, carries the sign of target WiMAX base station in request; Set up the first tunnel with terminal 701;
By the first tunnel and terminal 701, authenticate, so that terminal 701 is switched in the WiMAX Access Network of sign correspondence of target WiMAX base station.
Wherein, terminal 701, specifically for finding range by the first tunnel and switching server 702; By the first tunnel and switching server 702, carry out user terminal 701 basic capacity SBC and consult, exchanging capability information, ability information comprises version and the certification policy of key management PKM agreement; Receive after the EAP request/identification message of authenticator transmission, by switching server 702, return to EAP response/identity message to authenticator, in EAP response/identity message, comprise the user totem information of terminal 701; At certificate server, according to the user totem information in the EAP response/identity message of receiving, user is authenticated by rear, carry out two-way authentication and consult to obtain master session key MSK by switching server 702 with certificate server; According to MSK, and authenticator consults to obtain master key PMK and the authorization key AK between paired node by switching server 702; At authenticator, AK is passed to behind the simulation WiMAX base station of switching server 702, by the first tunnel, carry out message encryption cipher key T EK with simulation WiMAX base station and exchange; By the first tunnel, complete the registration of data path and the foundation of Business Stream with simulation WiMAX base station and WiMAX Access Network gateway; Open WiMAX radio frequency, close WiFi radio frequency.
Wherein, switching server 702, for finding range by the first tunnel and terminal 701; By the first tunnel and terminal 701, carry out SBC negotiation, exchanging capability information, ability information comprises version and the certification policy of key management PKM agreement; EAP request/identification message that receiving terminal 701 authenticators send, and forward EAP response/identity message to authenticator, in EAP response/identity message, comprise the user totem information of terminal 701; By the first tunnel, carry out TEK exchange with terminal 701; By the first tunnel and terminal 701, carry out the registration of data path and the foundation of Business Stream.
Wherein, when switching server 702 is in WiMAX core net, switching server 702, for setting up behind the first tunnel with terminal 701, sets up the second tunnel with the authenticator in WiMAX Access Network; Or switching server 702, sets up the second tunnel for elder generation and authenticator, then sets up the first tunnel with terminal 701.
Wherein, switching server 702, during WiFi access point identity that the handover request sending for terminal 701 comprises current connection, utilizes the WiFi access point identity of current connection, query candidate target WiMAX Base Station Identification; If find at least one candidate target WiMAX Base Station Identification, according to default selective rule, select one of them candidate target WiMAX base station as target WiMAX base station; To terminal 701, send handoff response, in handoff response, comprise the target WiMAX Base Station Identification of selecting from least one candidate target WiMAX base station.
Wherein, switching server 702, the inquiry request sending by WLAN Access Network for receiving terminal 701, comprises the WiFi access point identity of terminal 701 current connections in inquiry request; By the WiFi access point identity of the 701 current connections of terminal in inquiry request, query candidate target WiMAX Base Station Identification; By WLAN Access Network, Query Result is returned to terminal 701, if the Query Result that terminal 701 receives is at least one candidate target WiMAX Base Station Identification, terminal 701 is selected a candidate target WiMAX Base Station Identification as target WiMAX Base Station Identification according to default selective rule from Query Result.
Wherein, terminal 701 for opening WiMAX receiving circuit, is intercepted the broadcast that WiMAX base station sends on different frequencies; Receive after the broadcast of WiMAX base station, whether the base station that the content judgement from broadcast sends broadcast is the current target WiMAX base station of terminal 701, if so, by WLAN Access Network, to switching server 702, sends handover request message; Otherwise, continue to intercept at next frequency the broadcast that WiMAX base station sends.
The system that the embodiment of the present invention provides, injection multimode terminal is frequently from WiFi network is switched to WiMAX network, by complete WiMAX with switching server on WiFi access path, enter network process, reduce the time delay that WiMAX, WiFi multimode terminal switch from WLAN Access Network to WiMAX Access Network, improved user's experience.
Embodiment 5
The embodiment of the present invention provides a kind of switched system of Access Network, terminal is injection Wireless Fidelity WiFi/ micro-wave access global inter communication WiMAX multimode terminal frequently, switch to from WLAN (wireless local area network) WLAN Access Network and be switched to WiMAX Access Network, referring to Fig. 9, this system comprises: terminal 801 and switching server 802
Terminal 801, for obtaining the target WiMAX base station of switching; By WLAN Access Network, to switching server 802, send handover request, in handover request, carry target WiMAX Base Station Identification; Set up the first tunnel with switching server 802; By the first tunnel and switching server 802, find range; By the first tunnel and switching server 802, carry out user terminal 801 basic capacity SBC and consult, exchanging capability information, ability information comprises version and the certification policy of key management PKM agreement; Receive after the EAP request/identification message of authenticator transmission, by switching server 802, return to EAP response/identity message to authenticator, in EAP response/identity message, comprise the user totem information of terminal 801; At certificate server, according to the user totem information in the EAP response/identity message of receiving, user is authenticated by rear, carry out two-way authentication and consult to obtain master session key MSK by switching server 802 with certificate server; According to MSK, and authenticator consults to obtain master key PMK and the authorization key AK between paired node by switching server 802; At authenticator, AK is passed to behind the simulation WiMAX base station of switching server 802, and simulation WiMAX base station is carried out message encryption cipher key T EK by the first tunnel and is exchanged; By the first tunnel, complete the registration of data path and the foundation of Business Stream with simulation WiMAX base station and WiMAX Access Network gateway; Open WiMAX radio frequency, close WiFi radio frequency;
Switching server 802, for the handover request sending by WLAN Access Network receiving terminal 801; Set up the first tunnel with terminal 801; Message through the first tunnel is all the simulation WiMAX base station reception on switching server 802 and sends; By the first tunnel and terminal 801, find range; By the first tunnel and terminal 801, carry out SBC negotiation, exchanging capability information, ability information comprises version and the certification policy of key management PKM agreement; EAP request/identification message that receiving terminal 801 authenticators send, and forward EAP response/identity message to authenticator, in EAP response/identity message, comprise the user totem information of terminal 801; By the first tunnel, carry out TEK exchange with terminal 801; By the first tunnel and terminal 801, carry out the registration of data path and the foundation of Business Stream.
Wherein, when switching server 802 is in WiMAX core net, switching server 802, for setting up behind the first tunnel with terminal 801, sets up the second tunnel with the authenticator in WiMAX Access Network; Or switching server 802, sets up the second tunnel for elder generation and authenticator, then sets up the first tunnel with terminal 801.
Wherein, terminal 801, also for before closing WiFi radio frequency in terminal 801, sends to switching server 802 notification message that switches radio frequency.
Wherein, simulation WiMAX base station on switching server 802 is received AK or is received that terminal 801 sends after the notification message that switches radio frequency to switching server 802, switching server 802 sends to connect to home agent and keeps asking, so that home agent is received to connect, keeps temporarily for terminal 801 buffer memorys, being sent to the data of terminal 801 after request.
Wherein, terminal 801, also for simulation WiMAX base station and WiMAX Access Network gateway after the first tunnel completes the registration of data path and the foundation of Business Stream, send a request message, request enters idle condition, so that enter after idle condition in terminal 801, switching server 802 is removed the first tunnel of setting up with terminal 801.
Wherein, terminal 801, also for opening WiMAX radio frequency, after closing WiFi radio frequency, searches the target WiMAX base station that target WiMAX Base Station Identification is corresponding, exit from idle status, and execution enters network process fast; Obtain Mobile IP Care-of Address, and carry out mobile IP registration.
Wherein, terminal 801, also for obtaining Mobile IP Care-of Address, and after carrying out mobile IP registration, sends resource release request to switching server 802, and request discharges the related resource of WiFi Access Network.
Wherein, terminal 801, also for searching the switching server 802 of the injection frequency of support, and sets up safe communication port with the switching server 802 finding.
Wherein, terminal 801 is Single-Input Single-Output WiFi/WiMAX multimode terminal 801, while comprising the WiFi access point identity of current connection in handover request,
Switching server 802, the WiFi access point identity of the current connection comprising in the handover request of also utilizing terminal 801 to send, query candidate target WiMAX Base Station Identification;
If find at least one candidate target WiMAX Base Station Identification, switching server 802, according to default selective rule, selects one of them candidate target WiMAX base station as target WiMAX base station; Switching server 802 sends handoff response to terminal 801, comprises the target WiMAX Base Station Identification of selecting from least one candidate target WiMAX base station in handoff response;
If do not find candidate target WiMAX Base Station Identification, in the handoff response that switching server 802 sends to terminal 801, target WiMAX base station information be sky, so that terminal 801 receives target WiMAX base station information, is after empty handoff response, process ends; Or, in the handoff response that switching server 802 sends to terminal 801, represent refusal handover request, so that terminal 801 receives after the handoff response that refusal switches, process ends.
Wherein, when terminal 801 is Single-Input Single-Output WiFi/WiMAX multimode terminal 801,
Switching server 802, the inquiry request also sending by WLAN Access Network for receiving terminal 801, comprises the WiFi access point identity of terminal 801 current connections in inquiry request; By the WiFi access point identity of the 801 current connections of terminal in inquiry request, query candidate target WiMAX Base Station Identification; By WLAN Access Network, Query Result is returned to terminal 801, if the Query Result that terminal 801 receives is sky, terminal 801 process ends; Otherwise terminal 801 is selected a candidate target WiMAX Base Station Identification as target WiMAX Base Station Identification according to default selective rule from Query Result.
Wherein, when terminal 801 is two receipts single-shot WiFi/WiMAX multimode terminal 801,
Terminal 801 also for opening WiMAX receiving circuit, is intercepted the broadcast that WiMAX base station sends on different frequencies; Receive after the broadcast of WiMAX base station, whether the base station that the content judgement from broadcast sends broadcast is the current target WiMAX base station of terminal 801, if so, by WLAN Access Network, to switching server 802, sends handover request message; Otherwise, continue to intercept at next frequency the broadcast that WiMAX base station sends.
The system that the embodiment of the present invention provides, injection multimode terminal is frequently from WiFi network is switched to WiMAX network, by complete WiMAX with switching server on WiFi access path, enter network process, reduce the time delay that WiMAX, WiFi multimode terminal switch from WLAN Access Network to WiMAX Access Network, improved user's experience.
Embodiment 6
The embodiment of the present invention provides a kind of injection Wireless Fidelity WiFi/ micro-wave access global inter communication WiMAX multi-mode terminal equipment frequently, and when terminal is switched to WiMAX Access Network from WLAN (wireless local area network) WLAN Access Network, referring to Figure 10, this terminal equipment comprises:
The first sending module 901, for obtaining the target WiMAX Base Station Identification of switching, sends handover request by WLAN Access Network to switching server, carries target WiMAX Base Station Identification in handover request;
First sets up module 902, for setting up the first tunnel with switching server;
The first range finder module 903, for finding range by the first tunnel and switching server;
The first negotiation module 904, consults for carrying out user terminal basic capacity SBC by the first tunnel and switching server, exchanging capability information, and ability information comprises version and the certification policy of key management PKM agreement;
The first request module 905, receives by switching server EAP request/identification message that authenticator sends, and returns to EAP response/identity message to authenticator by switching server, comprises the user totem information of terminal in EAP response/identity message;
The first authentication module 906, for user being authenticated by rear according to the user totem information of the EAP response/identity message of receiving at certificate server, is carried out two-way authentication and is consulted to obtain master session key MSK by switching server with certificate server;
The first generation module 907, for according to MSK, and authenticator consults to obtain master key PMK and the authorization key AK between paired node by switching server;
The first Switching Module 908, at authenticator, AK being passed to behind the simulation WiMAX base station of switching server, carries out message encryption cipher key T EK with simulation WiMAX base station by the first tunnel and exchanges;
The first handover module 909, for completing the registration of data path and the foundation of Business Stream with simulation WiMAX base station and WiMAX Access Network gateway by the first tunnel; After the registration of data path and the foundation of Business Stream, open WiMAX radio frequency, close WiFi radio frequency.
Wherein, terminal is specially Single-Input Single-Output WiFi/WiMAX multimode terminal; Or, two receipts single-shot WiFi/WiMAX multimode terminals, when terminal is two receipts single-shot WiFi/WiMAX multimode terminal, the first sending module, comprising:
Intercept unit, for terminal, open WiMAX receiving circuit, on different frequencies, intercept the broadcast that WiMAX base station sends;
Judging unit, for terminal, receive after the broadcast of WiMAX base station, whether the base station that the content judgement from broadcast sends broadcast is the current target WiMAX base station of terminal, if so, by WLAN Access Network, to switching server, sends handover request message; Otherwise, continue to intercept at next frequency the broadcast that WiMAX base station sends.
The terminal equipment that the embodiment of the present invention provides, injection multimode terminal is frequently from WiFi network is switched to WiMAX network, by complete WiMAX with switching server on WiFi access path, enter network process, reduce the time delay that WiMAX, WiFi multimode terminal switch from WLAN Access Network to WiMAX Access Network, improved user's experience.
Embodiment 7
The embodiment of the present invention provides a kind of switching server equipment, and when injection frequency Wireless Fidelity WiFi/ micro-wave access global inter communication WiMAX multimode terminal is switched to WiMAX Access Network from WLAN (wireless local area network) WLAN Access Network, referring to Figure 11, this switching server equipment comprises:
The first receiver module 1001, for the handover request sending by WLAN Access Network receiving terminal;
Second sets up module 1002, for setting up the first tunnel with terminal;
The second range finder module 1003, for finding range by the first tunnel and terminal;
The second negotiation module 1004, for carrying out SBC negotiation by the first tunnel and terminal, exchanging capability information, ability information comprises version and the certification policy of key management PKM agreement;
The second request module 1005, EAP request/identification message that receiving terminal authenticator sends, and forward EAP response/identity message to authenticator, in EAP response/identity message, comprise the user totem information of terminal;
The second Switching Module 1006, at authenticator, AK being passed to behind the simulation WiMAX base station of switching server, and terminal is carried out message encryption cipher key T EK by the first tunnel and is exchanged;
The first Registering modules 1007, by the first tunnel and terminal and carry out the registration of data path and the foundation of Business Stream with WiMAX Access Network gateway.
Wherein, when switching server is in WiMAX core net, switching server, for setting up behind the first tunnel with terminal, sets up the second tunnel with the authenticator in WiMAX Access Network; Or switching server, sets up the second tunnel for elder generation and authenticator, then sets up the first tunnel with terminal.
Wherein, terminal is specially Single-Input Single-Output WiFi/WiMAX multimode terminal or two receipts single-shot WiFi/WiMAX multimode terminal, when terminal is Single-Input Single-Output WiFi/WiMAX multimode terminal, during the WiFi access point identity that comprises current connection in the handover request that terminal sends, the first receiver module, specifically comprises:
The first query unit, the WiFi access point identity of the current connection that the handover request of utilizing terminal to send for switching server comprises, query candidate target WiMAX Base Station Identification;
The first processing unit, if find at least one candidate target WiMAX Base Station Identification for switching server, switching server, according to default selective rule, selects one of them candidate target WiMAX base station as target WiMAX base station; In the handoff response that switching server sends to terminal, comprise the target WiMAX Base Station Identification of selecting from least one candidate target WiMAX base station;
The second processing unit, if do not find candidate target WiMAX Base Station Identification for switching server, in the handoff response that switching server sends to terminal, target WiMAX base station information be sky, so that terminal receives target WiMAX base station information, is after empty handoff response, process ends; Or, in the handoff response that switching server sends to terminal, represent refusal handover request, so that terminal receives after the handoff response that refusal switches, process ends.
Wherein, terminal is specially Single-Input Single-Output WiFi/WiMAX multimode terminal or two receipts single-shot WiFi/WiMAX multimode terminal, and when terminal is Single-Input Single-Output WiFi/WiMAX multimode terminal, the first receiver module, specifically comprises:
The first receiving element, the inquiry request sending by WLAN Access Network for receiving terminal, comprises the WiFi access point identity of the current connection of terminal in inquiry request;
The second query unit, for passing through the WiFi access point identity of the current connection of inquiry request terminal, query candidate target WiMAX Base Station Identification;
The 3rd processing unit, for by WLAN Access Network, Query Result being returned to terminal, if the Query Result that terminal receives is sky, terminal process ends; Otherwise terminal is selected a candidate target WiMAX Base Station Identification as target WiMAX Base Station Identification according to default selective rule from Query Result.
The switching server equipment that the embodiment of the present invention provides, injection multimode terminal is frequently from WiFi network is switched to WiMAX network, by complete WiMAX with switching server on WiFi access path, enter network process, reduce the time delay that WiMAX, WiFi multimode terminal switch from WLAN Access Network to WiMAX Access Network, improved user's experience.
The embodiment of the present invention can utilize software to realize, and corresponding software program can be stored in the storage medium can read, for example, and in the hard disk of router, buffer memory or CD.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims (38)

1. a changing method for Access Network, is characterized in that, described method comprises:
Terminal is obtained the target WiMAX Base Station Identification of switching;
Described terminal sends handover request by WLAN Access Network to switching server, carries the sign of target WiMAX base station in described request;
Described terminal and described switching server are set up the first tunnel;
Described terminal authenticates by described the first tunnel and described switching server, is switched in the WiMAX Access Network of sign correspondence of described target WiMAX base station;
Wherein, described terminal authenticates by described the first tunnel and described switching server, is switched in the WiMAX Access Network of sign correspondence of described target WiMAX base station, specifically comprises:
Described terminal is found range by described the first tunnel and described switching server;
Described terminal is carried out user terminal basic capacity SBC by described the first tunnel and described switching server and is consulted, exchanging capability information, and described ability information comprises version and the certification policy of key management PKM agreement;
Described terminal is received after EAP request/identification message, by described switching server, returns to EAP response/identity message to authenticator, the user totem information that comprises described terminal in described EAP response/identity message; Described authenticator sends to the certificate server in WiMAX core net by described user totem information, and described certificate server, according to the described user totem information of receiving, authenticates user;
Described terminal and described certificate server are carried out two-way authentication and are consulted to obtain master session key MSK by described switching server;
Described authenticator receives the MSK that described certificate server sends, and by described switching server and described terminal, consults to obtain master key PMK and the authorization key AK between paired node;
Described authenticator sends to AK the simulation WiMAX base station of switching server;
Described terminal and described simulation WiMAX base station are carried out message encryption cipher key T EK by described the first tunnel and are exchanged;
Described terminal and described simulation WiMAX base station and WiMAX Access Network gateway complete the registration of data path and the foundation of Business Stream through the first tunnel;
Described terminal is opened WiMAX radio frequency, closes WiFi radio frequency, is switched in WiMAX Access Network.
2. the method for claim 1, is characterized in that, when described switching server is in WiMAX core net, described switching server and described terminal, after setting up described the first tunnel, are set up the second tunnel with the authenticator in described WiMAX Access Network; Or described switching server is first set up described the second tunnel with described authenticator, then sets up the first tunnel with described terminal.
3. the method for claim 1, is characterized in that, described terminal is obtained the target WiMAX Base Station Identification of switching, specifically comprises:
The WiFi access point identity that comprises current connection in described handover request;
The WiFi access point identity of the current connection comprising in the handover request that described switching server utilizes described terminal to send, query candidate target WiMAX Base Station Identification;
If described switching server finds at least one candidate target WiMAX Base Station Identification, described switching server, according to default selective rule, selects one of them candidate target WiMAX base station as target WiMAX base station; Described switching server sends handoff response to described terminal, comprises the target WiMAX Base Station Identification of selecting from least one candidate target WiMAX base station in described handoff response.
4. the method for claim 1, is characterized in that, described terminal is obtained the target WiMAX Base Station Identification of switching, specifically comprises:
Described switching server receives the inquiry request that described terminal sends by WLAN Access Network, comprises the WiFi access point identity of the current connection of described terminal in described inquiry request;
Described switching server is by the WiFi access point identity of the current connection of terminal described in described inquiry request, query candidate target WiMAX Base Station Identification;
Described switching server returns to described terminal by WLAN Access Network by Query Result, if the Query Result that described terminal receives is at least one candidate target WiMAX Base Station Identification, described terminal is selected a candidate target WiMAX Base Station Identification as target WiMAX Base Station Identification according to default selective rule from Query Result.
5. the method for claim 1, is characterized in that, described terminal is obtained the target WiMAX Base Station Identification of switching, specifically comprises:
Described terminal is opened WiMAX receiving circuit, intercepts the broadcast that WiMAX base station sends on different frequencies;
Described terminal is received after the broadcast of WiMAX base station, whether the base station that the content judgement from broadcast sends broadcast is the current target WiMAX base station of described terminal, if so, by WLAN Access Network, to described switching server, send handover request message; Otherwise, continue to intercept at next frequency the broadcast that WiMAX base station sends.
6. a changing method for Access Network, is characterized in that, terminal is frequently Wireless Fidelity WiFi/ micro-wave access global inter communication WiMAX multimode terminal of injection, described in switch to from WLAN (wireless local area network) WLAN Access Network and be switched to WiMAX Access Network, described method comprises:
Described terminal is obtained the target WiMAX Base Station Identification of switching;
Described terminal sends handover request by WLAN Access Network to switching server, carries the sign of target WiMAX base station in described request;
Described terminal and described switching server are set up the first tunnel;
Described terminal is found range by described the first tunnel and described switching server;
Described terminal is carried out user terminal basic capacity SBC by described the first tunnel and described switching server and is consulted, exchanging capability information, and described ability information comprises version and the certification policy of key management PKM agreement;
Described terminal is received after EAP request/identification message, by described switching server, returns to EAP response/identity message to authenticator, the user totem information that comprises described terminal in described EAP response/identity message; Described authenticator sends to the certificate server in WiMAX core net by described user totem information, and described certificate server, according to the described user totem information of receiving, authenticates user;
Described terminal and described certificate server are carried out two-way authentication and are consulted to obtain master session key MSK by described switching server;
Described authenticator receives the MSK that described certificate server sends, and by described switching server and described terminal, consults to obtain master key PMK and the authorization key AK between paired node;
Described authenticator sends to AK the simulation WiMAX base station of switching server;
Described terminal and described simulation WiMAX base station are carried out message encryption cipher key T EK by described the first tunnel and are exchanged;
Described terminal and described simulation WiMAX base station and WiMAX Access Network gateway complete the registration of data path and the foundation of Business Stream through the first tunnel;
Described terminal is opened WiMAX radio frequency, closes WiFi radio frequency.
7. method as claimed in claim 6, is characterized in that, when described switching server is in WiMAX core net, described switching server and described terminal, after setting up described the first tunnel, are set up the second tunnel with the authenticator in described WiMAX Access Network; Or described switching server is first set up described the second tunnel with described authenticator, then sets up the first tunnel with described terminal.
8. method as claimed in claim 6, is characterized in that, before described terminal is closed WiFi radio frequency, described terminal sends the notification message that switches radio frequency to described switching server.
9. the method as described in claim 6 or 8, it is characterized in that, simulation WiMAX base station on described switching server is received AK or is received that described terminal sends after the notification message that switches radio frequency to switching server, described switching server sends and connects maintenance request to home agent, so that described home agent receives that described connection keeps being temporarily sent to the data of terminal for described terminal buffers after request.
10. method as claimed in claim 6, is characterized in that, described terminal and described simulation WiMAX base station and WiMAX Access Network gateway, after the first tunnel completes the registration of data path and the foundation of Business Stream, also comprise:
Described terminal sends a request message, and request enters idle condition;
Described switching server is removed the first tunnel of setting up with described terminal.
11. methods as claimed in claim 10, is characterized in that, described terminal is opened WiMAX radio frequency, after closing WiFi radio frequency, also comprise:
Described terminal is searched the target WiMAX base station that described target WiMAX Base Station Identification is corresponding, exit from idle status, and execution enters network process fast;
Described terminal is obtained Mobile IP Care-of Address, and carries out mobile IP registration.
12. methods as claimed in claim 11, is characterized in that, described terminal is obtained Mobile IP Care-of Address, and after carrying out mobile IP registration, also comprise:
Described terminal sends resource release request to described switching server, and request discharges the related resource of WiFi Access Network.
13. methods as claimed in claim 6, is characterized in that, described terminal also comprises before sending handover request by WLAN Access Network to switching server:
Described terminal is searched the switching server of the injection frequency of support, and sets up safe communication port with the switching server finding.
14. methods as claimed in claim 6, is characterized in that, described terminal is obtained the target WiMAX Base Station Identification of switching, specifically comprises:
The WiFi access point identity that comprises current connection in described handover request;
The WiFi access point identity of the current connection comprising in the handover request that described switching server utilizes described terminal to send, query candidate target WiMAX Base Station Identification;
If described switching server finds at least one candidate target WiMAX Base Station Identification, described switching server, according to default selective rule, selects one of them candidate target WiMAX base station as target WiMAX base station; Described switching server sends handoff response to described terminal, comprises the target WiMAX Base Station Identification of selecting from least one candidate target WiMAX base station in described handoff response;
If described switching server does not find candidate target WiMAX Base Station Identification, in the handoff response that described switching server sends to described terminal, target WiMAX base station information is empty, so that described terminal receives target WiMAX base station information, be after empty handoff response, process ends; Or, in the handoff response that described switching server sends to described terminal, represent refusal handover request, so that described terminal receives after the handoff response that refusal switches, process ends.
15. methods as claimed in claim 6, is characterized in that, described terminal is obtained the target WiMAX Base Station Identification of switching, specifically comprises:
Described switching server receives the inquiry request that described terminal sends by WLAN Access Network, comprises the WiFi access point identity of the current connection of described terminal in described inquiry request;
Described switching server is by the WiFi access point identity of the current connection of terminal described in described inquiry request, query candidate target WiMAX Base Station Identification;
Described switching server returns to described terminal by WLAN Access Network by Query Result, if the Query Result that described terminal receives is sky, described terminal process ends; Otherwise described terminal is selected a candidate target WiMAX Base Station Identification as target WiMAX Base Station Identification according to default selective rule from Query Result.
16. methods as claimed in claim 6, is characterized in that, described terminal is obtained the target WiMAX Base Station Identification of switching, specifically comprises:
Described terminal is opened WiMAX receiving circuit, intercepts the broadcast that WiMAX base station sends on different frequencies;
Described terminal is received after the broadcast of WiMAX base station, whether the base station that the content judgement from broadcast sends broadcast is the current target WiMAX base station of described terminal, if so, by WLAN Access Network, to described switching server, send handover request message; Otherwise, continue to intercept at next frequency the broadcast that WiMAX base station sends.
The switched system of 17. 1 kinds of Access Networks, is characterized in that, described system comprises: terminal and switching server,
Described terminal, for obtaining the target WiMAX Base Station Identification of switching; By WLAN Access Network, to switching server, send handover request, in described request, carry the sign of target WiMAX base station; Set up the first tunnel with described switching server; By described the first tunnel and described switching server, authenticate, be switched in the WiMAX Access Network of sign correspondence of described target WiMAX base station;
Described switching server, for receive the handover request of described terminal transmission by WLAN Access Network, carries the sign of target WiMAX base station in described request; Set up the first tunnel with described terminal; By described the first tunnel and described terminal, authenticate, so that described terminal is switched in the WiMAX Access Network of sign correspondence of described target WiMAX base station;
Wherein, described terminal, specifically for finding range by described the first tunnel and described switching server; By described the first tunnel and described switching server, carry out user terminal basic capacity SBC and consult, exchanging capability information, described ability information comprises version and the certification policy of key management PKM agreement; Receive after the EAP request/identification message of authenticator transmission, by described switching server, return to EAP response/identity message to authenticator, the user totem information that comprises terminal in described EAP response/identity message; At described authenticator, described EAP response/identity message is forwarded to certificate server, described certificate server is authenticated by rear user according to the user totem information in the EAP response/identity message of receiving, carry out two-way authentication and consult to obtain master session key MSK by described switching server with described certificate server; At described certificate server, described MSK is sent to after described authenticator, according to described MSK, and described authenticator consults to obtain master key PMK and the authorization key AK between paired node by described switching server; At described authenticator, described AK is passed to behind the simulation WiMAX base station of switching server, by described the first tunnel, carry out message encryption cipher key T EK with described simulation WiMAX base station and exchange; By described the first tunnel, complete the registration of data path and the foundation of Business Stream with described simulation WiMAX base station and WiMAX Access Network gateway; Open WiMAX radio frequency, close WiFi radio frequency;
Wherein, described switching server, for finding range by described the first tunnel and described terminal; By described the first tunnel and described terminal, carry out SBC negotiation, exchanging capability information, described ability information comprises version and the certification policy of key management PKM agreement; Receive the EAP response/identity message that described terminal sends, and forward EAP response/identity message to described authenticator, the user totem information that comprises terminal in described EAP response/identity message; By described the first tunnel, carry out TEK exchange with described terminal; By described the first tunnel and described terminal, carry out the registration of data path and the foundation of Business Stream.
18. systems as claimed in claim 17, it is characterized in that, when described switching server is in WiMAX core net, described switching server, for setting up behind described the first tunnel with described terminal, set up the second tunnel with the authenticator in described WiMAX Access Network; Or described switching server, sets up described the second tunnel for first and described authenticator, then sets up the first tunnel with described terminal.
19. systems as claimed in claim 17, is characterized in that,
Described switching server, during WiFi access point identity that the handover request sending for described terminal comprises current connection, utilizes the WiFi access point identity of described current connection, query candidate target WiMAX Base Station Identification; If find at least one candidate target WiMAX Base Station Identification, according to default selective rule, select one of them candidate target WiMAX base station as target WiMAX base station; To described terminal, send handoff response, in described handoff response, comprise the target WiMAX Base Station Identification of selecting from least one candidate target WiMAX base station.
20. systems as claimed in claim 17, is characterized in that,
Described switching server, the inquiry request sending by WLAN Access Network for receiving described terminal, comprises the WiFi access point identity of the current connection of described terminal in described inquiry request; By the WiFi access point identity of the current connection of terminal described in described inquiry request, query candidate target WiMAX Base Station Identification; By WLAN Access Network, Query Result is returned to described terminal, if the Query Result that described terminal receives is at least one candidate target WiMAX Base Station Identification, described terminal is selected a candidate target WiMAX Base Station Identification as target WiMAX Base Station Identification according to default selective rule from Query Result.
21. systems as claimed in claim 17, is characterized in that,
Described terminal for opening WiMAX receiving circuit, is intercepted the broadcast that WiMAX base station sends on different frequencies; Receive after the broadcast of WiMAX base station, whether the base station that the content judgement from broadcast sends broadcast is the current target WiMAX base station of described terminal, if so, by WLAN Access Network, to described switching server, sends handover request message; Otherwise, continue to intercept at next frequency the broadcast that WiMAX base station sends.
The switched system of 22. 1 kinds of Access Networks, it is characterized in that, terminal is frequently Wireless Fidelity WiFi/ micro-wave access global inter communication WiMAX multimode terminal of injection, described in switch to from WLAN (wireless local area network) WLAN Access Network and be switched to WiMAX Access Network, described system comprises: terminal and switching server
Described terminal, for obtaining the target WiMAX Base Station Identification of switching; By WLAN Access Network, to switching server, send handover request, in described handover request, carry target WiMAX Base Station Identification; Set up the first tunnel with described switching server; By described the first tunnel and described switching server, find range; By described the first tunnel and described switching server, carry out user terminal basic capacity SBC and consult, exchanging capability information, described ability information comprises version and the certification policy of key management PKM agreement; Receive after the EAP request/identification message of authenticator transmission, by described switching server, return to EAP response/identity message to authenticator, the user totem information that comprises terminal in described EAP response/identity message; At described authenticator, described EAP response/identity message is forwarded to certificate server, described certificate server is authenticated by rear user according to the user totem information in the EAP response/identity message of receiving, carry out two-way authentication and consult to obtain master session key MSK by described switching server with described certificate server; At described certificate server, described MSK is sent to after described authenticator, according to described MSK, and described authenticator consults to obtain master key PMK and the authorization key AK between paired node by described switching server; At described authenticator, described AK is passed to behind the simulation WiMAX base station of switching server, and described simulation WiMAX base station is carried out message encryption cipher key T EK by described the first tunnel and is exchanged; By described the first tunnel, complete the registration of data path and the foundation of Business Stream with described simulation WiMAX base station and WiMAX Access Network gateway; Open WiMAX radio frequency, close WiFi radio frequency;
Described switching server, the handover request sending for receive described terminal by WLAN Access Network; Set up the first tunnel with described terminal; Message through the first tunnel is all the simulation WiMAX base station reception on switching server and sends; By described the first tunnel and described terminal, find range; By described the first tunnel and described terminal, carry out SBC negotiation, exchanging capability information, described ability information comprises version and the certification policy of key management PKM agreement; Receive the EAP response/identity message that described terminal sends, and forward EAP response/identity message to described authenticator, the user totem information that comprises terminal in described EAP response/identity message; By described the first tunnel, carry out TEK exchange with described terminal; By described the first tunnel and described terminal, carry out the registration of data path and the foundation of Business Stream.
23. the system as claimed in claim 22, it is characterized in that, when described switching server is in WiMAX core net, described switching server, for setting up behind described the first tunnel with described terminal, set up the second tunnel with the authenticator in described WiMAX Access Network; Or described switching server, sets up described the second tunnel for first and described authenticator, then sets up the first tunnel with described terminal.
24. the system as claimed in claim 22, is characterized in that, described terminal, also for before closing WiFi radio frequency in described terminal, sends the notification message that switches radio frequency to described switching server.
25. systems as described in claim 22 or 24, it is characterized in that, simulation WiMAX base station on described switching server is received AK or is received that described terminal sends after the notification message that switches radio frequency to switching server, described switching server sends and connects maintenance request to home agent, so that described home agent receives that described connection keeps being temporarily sent to the data of terminal for described terminal buffers after request.
26. the system as claimed in claim 22, is characterized in that,
Described terminal, also for described simulation WiMAX base station and WiMAX Access Network gateway after the first tunnel completes the registration of data path and the foundation of Business Stream, send a request message, request enters idle condition, so that enter after idle condition in described terminal, described switching server is removed the first tunnel of setting up with described terminal.
27. systems as claimed in claim 26, is characterized in that,
Described terminal, also for opening WiMAX radio frequency, after closing WiFi radio frequency, searches the target WiMAX base station that described target WiMAX Base Station Identification is corresponding, exit from idle status, and execution enters network process fast; Obtain Mobile IP Care-of Address, and carry out mobile IP registration.
28. systems as claimed in claim 27, is characterized in that, described terminal also for obtaining Mobile IP Care-of Address, and after carrying out mobile IP registration, sends resource release request to described switching server, and request discharges the related resource of WiFi Access Network.
29. the system as claimed in claim 22, is characterized in that,
Described terminal, also for searching the switching server of the injection frequency of support, and sets up safe communication port with the switching server finding.
30. the system as claimed in claim 22, is characterized in that, described terminal is Single-Input Single-Output WiFi/WiMAX multimode terminal, while comprising the WiFi access point identity of current connection in described handover request,
Described switching server, the WiFi access point identity of the current connection comprising in the handover request of also utilizing described terminal to send, query candidate target WiMAX Base Station Identification;
If find at least one candidate target WiMAX Base Station Identification, described switching server, according to default selective rule, selects one of them candidate target WiMAX base station as target WiMAX base station; Described switching server sends handoff response to described terminal, comprises the target WiMAX Base Station Identification of selecting from least one candidate target WiMAX base station in described handoff response;
If do not find candidate target WiMAX Base Station Identification, in the handoff response that described switching server sends to described terminal, target WiMAX base station information is empty, so that described terminal receives target WiMAX base station information, be after empty handoff response, process ends; Or, in the handoff response that described switching server sends to described terminal, represent refusal handover request, so that described terminal receives after the handoff response that refusal switches, process ends.
31. the system as claimed in claim 22, is characterized in that, when described terminal is Single-Input Single-Output WiFi/WiMAX multimode terminal,
Described switching server, the inquiry request also sending by WLAN Access Network for receiving described terminal, comprises the WiFi access point identity of the current connection of described terminal in described inquiry request; By the WiFi access point identity of the current connection of terminal described in described inquiry request, query candidate target WiMAX Base Station Identification; By WLAN Access Network, Query Result is returned to described terminal, if the Query Result that described terminal receives is sky, described terminal process ends; Otherwise described terminal is selected a candidate target WiMAX Base Station Identification as target WiMAX Base Station Identification according to default selective rule from Query Result.
32. the system as claimed in claim 22, is characterized in that, when described terminal is two receipts single-shot WiFi/WiMAX multimode terminal,
Described terminal also for opening WiMAX receiving circuit, is intercepted the broadcast that WiMAX base station sends on different frequencies; Receive after the broadcast of WiMAX base station, whether the base station that the content judgement from broadcast sends broadcast is the current target WiMAX base station of described terminal, if so, by WLAN Access Network, to described switching server, sends handover request message; Otherwise, continue to intercept at next frequency the broadcast that WiMAX base station sends.
33. 1 kinds of injection frequency Wireless Fidelity WiFi/ micro-wave access global inter communication WiMAX multi-mode terminal equipments, is characterized in that, when described terminal is switched to WiMAX Access Network from WLAN (wireless local area network) WLAN Access Network, described terminal equipment comprises:
The first sending module, for obtaining the target WiMAX Base Station Identification of switching, sends handover request by WLAN Access Network to switching server, carries target WiMAX Base Station Identification in described handover request;
First sets up module, for setting up the first tunnel with described switching server;
The first range finder module, for finding range by described the first tunnel and described switching server;
The first negotiation module, consults for carrying out user terminal basic capacity SBC by described the first tunnel and described switching server, exchanging capability information, and described ability information comprises version and the certification policy of key management PKM agreement;
The first request module, receives by described switching server EAP request/identification message that authenticator sends, and by described switching server, returns to EAP response/identity message to authenticator, the user totem information that comprises terminal in described EAP response/identity message;
The first authentication module, for described EAP response/identity message being forwarded to certificate server at described authenticator, described certificate server is authenticated by rear user according to the user totem information in the EAP response/identity message of receiving, carry out two-way authentication and consult to obtain master session key MSK by described switching server with described certificate server;
The first generation module, at described certificate server, described MSK being sent to after described authenticator, according to described MSK, and described authenticator consults to obtain master key PMK and the authorization key AK between paired node by described switching server;
The first Switching Module, for described AK being passed to behind the simulation WiMAX base station of switching server at described authenticator, and described simulation WiMAX base station is carried out message encryption cipher key T EK by described the first tunnel and is exchanged;
The first handover module, for completing the registration of data path and the foundation of Business Stream with described simulation WiMAX base station and WiMAX Access Network gateway by described the first tunnel; After the registration of data path and the foundation of Business Stream, open WiMAX radio frequency, close WiFi radio frequency.
34. terminal equipments as claimed in claim 33, is characterized in that, described terminal is specially Single-Input Single-Output WiFi/WiMAX multimode terminal; Or, two receipts single-shot WiFi/WiMAX multimode terminals, when described terminal is two receipts single-shot WiFi/WiMAX multimode terminal, described the first sending module, comprising:
Intercept unit, for described terminal, open WiMAX receiving circuit, on different frequencies, intercept the broadcast that WiMAX base station sends;
Judging unit, for described terminal, receive after the broadcast of WiMAX base station, whether the base station that the content judgement from broadcast sends broadcast is the current target WiMAX base station of described terminal, if so, by WLAN Access Network, to described switching server, sends handover request message; Otherwise, continue to intercept at next frequency the broadcast that WiMAX base station sends.
35. 1 kinds of switching server equipment, is characterized in that, when injection frequency Wireless Fidelity WiFi/ micro-wave access global inter communication WiMAX multimode terminal is switched to WiMAX Access Network from WLAN (wireless local area network) WLAN Access Network, described switching server equipment comprises:
The first receiver module, the handover request sending for receive described terminal by WLAN Access Network;
Second sets up module, for setting up the first tunnel with described terminal;
The second range finder module, for finding range by described the first tunnel and described terminal;
The second negotiation module, for carrying out SBC negotiation by described the first tunnel and described terminal, exchanging capability information, described ability information comprises version and the certification policy of key management PKM agreement;
The second request module, receives the EAP response/identity message that described terminal sends, and forwards EAP response/identity message to authenticator, the user totem information that comprises terminal in described EAP response/identity message;
The second Switching Module, for described EAP response/identity message being forwarded to certificate server at described authenticator, make described certificate server according to the user totem information in the EAP response/identity message of receiving to user authenticate by, and make described terminal and described certificate server carry out two-way authentication and consult to obtain MSK, and described certificate server sends to described authenticator by described MSK, described terminal consults to obtain master key PMK and the authorization key AK between paired node according to described MSK and described authenticator, make described authenticator described AK be passed to behind the simulation WiMAX base station of switching server, by described the first tunnel, carrying out message encryption cipher key T EK with described terminal exchanges,
The first Registering modules, by described the first tunnel and described terminal and carry out the registration of data path and the foundation of Business Stream with WiMAX Access Network gateway.
36. server apparatus as claimed in claim 35, it is characterized in that, when described switching server is in WiMAX core net, described switching server, for setting up behind described the first tunnel with described terminal, set up the second tunnel with the authenticator in described WiMAX Access Network; Or described switching server, sets up described the second tunnel for first and described authenticator, then sets up the first tunnel with described terminal.
37. server apparatus as claimed in claim 35, it is characterized in that, described terminal is specially Single-Input Single-Output WiFi/WiMAX multimode terminal or two receipts single-shot WiFi/WiMAX multimode terminal, when described terminal is Single-Input Single-Output WiFi/WiMAX multimode terminal, in the handover request that described terminal sends, comprise current connection WiFi access point identity time, described the first receiver module, specifically comprises:
The first query unit, the WiFi access point identity of the current connection that the handover request of utilizing terminal to send for described switching server comprises, query candidate target WiMAX Base Station Identification;
The first processing unit, if find at least one candidate target WiMAX Base Station Identification for described switching server, described switching server, according to default selective rule, selects one of them candidate target WiMAX base station as target WiMAX base station; In the handoff response that described switching server sends to described terminal, comprise the target WiMAX Base Station Identification of selecting from least one candidate target WiMAX base station;
The second processing unit, if do not find candidate target WiMAX Base Station Identification for described switching server, in the handoff response that described switching server sends to described terminal, target WiMAX base station information is empty, so that described terminal receives target WiMAX base station information, be after empty handoff response, process ends; Or, in the handoff response that described switching server sends to described terminal, represent refusal handover request, so that described terminal receives after the handoff response that refusal switches, process ends.
38. server apparatus as claimed in claim 35, it is characterized in that, described terminal is specially Single-Input Single-Output WiFi/WiMAX multimode terminal or two receipts single-shot WiFi/WiMAX multimode terminal, when described terminal is Single-Input Single-Output WiFi/WiMAX multimode terminal, described the first receiver module, specifically comprises:
The first receiving element, the inquiry request sending by WLAN Access Network for receiving described terminal, comprises the WiFi access point identity of the current connection of described terminal in described inquiry request;
The second query unit, for by the WiFi access point identity of the current connection of terminal described in described inquiry request, query candidate target WiMAX Base Station Identification;
The 3rd processing unit, for by WLAN Access Network, Query Result being returned to described terminal, if the Query Result that described terminal receives is sky, described terminal process ends; Otherwise described terminal is selected a candidate target WiMAX Base Station Identification as target WiMAX Base Station Identification according to default selective rule from Query Result.
CN200910136345.9A 2009-05-11 2009-05-11 Method, system and equipment for switching access network Expired - Fee Related CN101888631B (en)

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