CN102546154A - Mobile communication network and switching method of terminal - Google Patents
Mobile communication network and switching method of terminal Download PDFInfo
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- CN102546154A CN102546154A CN2011104257887A CN201110425788A CN102546154A CN 102546154 A CN102546154 A CN 102546154A CN 2011104257887 A CN2011104257887 A CN 2011104257887A CN 201110425788 A CN201110425788 A CN 201110425788A CN 102546154 A CN102546154 A CN 102546154A
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Abstract
The invention relates to a mobile communication network and a switching method of a terminal between a wireless local area network and a wireless cellular access network, which solve the problem of switching of the terminal between the conventional wireless local area network and wireless cellular access network. The mobile communication network comprises a core network, a wireless local area network, a connection core network, and a wireless local area network access gateway and a wireless cellular access network of the wireless local area network; the core network comprises a grouped data gateway; and the terminal in the wireless local area network is accessed to the grouped data gateway of the core network through the wireless local area network access gateway.
Description
Technical field
The present invention relates to communication technical field, relate in particular to the changing method at a kind of mobile communications network and terminal.
Background technology
FMC (Fixed Mobile Convergence; Admittedly move fusion) be that the superiority bandwidth of fixed network and mobile network's mobile advantage are combined; Make the user use same terminal to be linked into core network via different access networks; And can under different access networks covers, move freely and switch, and obtain business and consistent business experience completely.
Along with the development of FMC technology with to carry out the increasing demand of fused business based on 3GPP and non-3GPP (comprising WLAN) wireless access technology urgent; Solve high, the bad problem of internal home network spreadability of bandwidth cost that 3GPP mobile wireless access network network exists; Use various wireless access technologys anywhere or anytime for the user more easily; High bandwidth business service means seamless, that use mobile core network to provide with can move freely; No matter be to the user or to operator, it is more and more important all to become.
Switching between 3GPP and the non-3 GPP access network is implemented in the 3GPP LTE related protocol and has obtained unification, in progressively improving at present and revising.In the international standard between defined heterogeneous network the seamless switching scheme be based on MIP (move IP) and realize; Require core net to upgrade to the EPC network; Dispose FA (external agent), HA (home agent), SGW equipment such as (SGWs) in the network; Access to WLAN realizes through ePDG equipment, through setting up the IPSEC escape way between ePDG and the terminal, realizes the service security of user through WLAN access mobile core net.
Do not see as yet at present and use bimodulus or multimode terminal, can freely insert 2G or 3G mobile network and Wireless LAN IP broadband network also can be realized seamless switching between two kinds of networks the commercial case of success.According to the method for association area or technology, if first and second networks share I P each other, then IP need be come to assign again by second network of carrying out its switching.Therefore, but transfer of data/reception possibly not be a smooth operation.
Summary of the invention
Technical problem to be solved by this invention is; A kind of mobile communications network and the terminal changing method between WLAN and radio honeycomb Access Network is provided; Come the office terminal incision and cut out process through internet key exchange protocol between terminal and the WLAN IAD, and reuse and consult security association and the IP security protocol passage between them.
In order to address the above problem; The invention provides a kind of mobile communications network; The WLAN IAD and the radio honeycomb Access Network that comprise core net, WLAN, the said core net of connection and said WLAN; It is characterized in that, comprise a packet data gateway in the said core net, when the terminal is in the said WLAN, access to said packet data gateway through said WLAN IAD.
As optional technical scheme, when the terminal is in the said WLAN, pass through internet key exchange protocol managing I P security protocol passage between said WLAN IAD and the said terminal.
As optional technical scheme, said terminal switches to said WLAN from said radio honeycomb Access Network, launches the security association between original said terminal and the said WLAN IAD; Said terminal switches to said radio honeycomb Access Network from said WLAN, the security association between reservation and the said WLAN IAD.
As optional technical scheme, further comprise the proxy-mobile IP module in the said WLAN IAD.
The present invention further provides a kind of changing method that is in the terminal in the above-mentioned network, and switch to WLAN from the radio honeycomb Access Network at said terminal, comprises the steps:
A) whether have the IP security protocol passage between said terminal inspection self and the said WLAN IAD, if existence, execution in step b then is not if exist then execution in step e;
B) the internet key exchange protocol information request message that does not comprise load information is sent to said WLAN IAD in said terminal, requires to set up service channel between said WLAN IAD and the said packet data gateway;
C) said WLAN IAD is received described request information, and whether the security association between inspection and the said terminal is effective, as effectively, and execution in step f then, otherwise execution in step d;
D) said WLAN IAD returns the internet key exchange protocol info response message that comprises notification payload information to said terminal, and the indication Security Parameter Index is invalid;
E) said terminal uses complete internet key exchange protocol process to set up the IP security protocol passage between self and the said WLAN IAD; And accomplish the foundation of service channel between said WLAN IAD and the said packet data gateway, change execution in step h then over to);
F) set up service channel between said WLAN IAD and the said packet data gateway;
G) said WLAN IAD sends the internet key exchange protocol response message that does not comprise load information to said terminal, notifies said terminal switching process to accomplish;
H) service channel between said packet data gateway release and said radio honeycomb Access Network.
As optional technical scheme; Among the said step e; Said terminal use complete internet key exchange protocol process set up self with said WLAN IAD between the IP security protocol passage, further comprise the steps: e1) said terminal sends to insert to said WLAN IAD and asks; E2) aaa server/home subscriber server of said WLAN IAD in being arranged on said core net initiated the subscription authentication request; E3) said aaa server/home subscriber server receives after the said authentication request compute authentication parameter and returns Authentication Response; E4) the said Authentication Response that returns according to said aaa server/home subscriber server of said WLAN IAD is to the authentication parameter at the said terminal of said terminal request; E5) said terminal authentication parameter to said WLAN IAD is returned at said terminal; E6) said WLAN IAD carries out authentication according to said Authentication Response and said terminal authentication parameter that said aaa server/home subscriber server returns; E7) after the completion authentication, set up said IP security protocol passage between said terminal and the said WLAN IAD.
As optional technical scheme, said step f further comprises: f11) said WLAN IAD is initiated request for building link to said packet data gateway; F12) behind the link between said packet data gateway foundation and the said WLAN IAD, return link is set up success response, and discharges the service channel between the original and said radio honeycomb Access Network; F13) after said WLAN IAD is received said link establishment success response, send the message of successfully setting up service channel to said terminal.
As optional technical scheme, said step f further comprises: f21) said WLAN IAD is initiated the proxy-mobile IP binding update messages to said packet data gateway; F22) said packet data gateway returns the agent binding response message to said WLAN IAD, and recalls request message to said radio honeycomb access network access controller or the binding of Service Gateway initiation proxy-mobile IP simultaneously; F23) air-link resources of release of said radio honeycomb access network access controller or Service Gateway and said terminal room; F24) said radio honeycomb access network access controller or Service Gateway are recalled response message with the proxy-mobile IP binding and are sent to said packet data gateway.
The present invention further provides the changing method at the terminal in a kind of above-mentioned network, and switch to said radio honeycomb Access Network from said WLAN at said terminal, comprises the steps:
A) said packet data gateway is after the service channel between completion and the said radio honeycomb Access Network is set up, and transmission information is notified the service channel between said WLAN IAD release and the said packet data gateway;
B) whether said WLAN IAD will discharge the security association between said WLAN IAD and the said terminal according to cell in the said packet data gateway institute photos and sending messages or the configuration of self decision; Discharge if desired; Steps performed C then; As do not need to discharge execution in step D then;
C) said WLAN IAD sends the internet key exchange protocol information request message that comprises notification payload information to said terminal; Said WLAN IAD is deleted the security association with said terminal room after sending message or after receiving the response message that returns at said terminal;
D) said WLAN IAD periodically sends the internet key exchange protocol information request message to said terminal, to keep security association each other.
As optional technical scheme, said steps A further comprises: A11) radio honeycomb access network access controller or Service Gateway are initiated request for building link to said packet data gateway; A12) behind the link between said packet data gateway foundation and said radio honeycomb access network access controller or the Service Gateway, return link is set up success response, and sends link release request message to said WLAN IAD simultaneously; A13) after said radio honeycomb access network access controller or Service Gateway are received the link establishment success response that said packet data gateway returns, send the message of successfully setting up data channel to said terminal.
As optional technical scheme, said steps A further comprises: A21) said radio honeycomb access network access controller or Service Gateway are initiated the proxy-mobile IP binding update messages to said packet data gateway; A22) said packet data gateway returns proxy-mobile IP binding response message to said radio honeycomb access network access controller or Service Gateway, and initiates the proxy-mobile IP binding to said WLAN IAD simultaneously and recall request message; A23) said WLAN IAD is recalled response message with the proxy-mobile IP binding and is sent to said packet data gateway.
As optional technical scheme, said step D further comprises: said terminal checks whether said security association exists, if exist, the internet key exchange protocol info response message that does not comprise load information is returned at said terminal; If do not exist, the internet key exchange protocol info response message that comprises notification payload information is returned at said terminal, and the indication Security Parameter Index is invalid.
As optional technical scheme; Said step D further comprises: if said WLAN IAD continuous several times is not received the response message that said terminal is returned; Perhaps received the internet key exchange protocol info response message that comprises notification payload information; Should delete and said terminal between security association, and stop to send periodic request message to said terminal.
The invention has the advantages that, the technical scheme of the seamless switching that the present invention proposes, the terminal remains the IP address in the across a network handoff procedure constant; Support the switching between mobile wireless network that multiple wlan access network such as WiFi/WiMax/Bluetooth and 3GPP/3GPP2 standardization body define; Support IPSEC, guarantee the service security when core network packet-domain is inserted via WLAN and IP network in the terminal; The present invention supports multiple terminal form, comprises hand-held mobile terminal, data card or the client of utilizing other form external device to insert.Can realize professional seamless switching or keep the mobile service continuity at the stack area of coverage of WLAN and radio honeycomb access network through the method that the present invention describes as long as support WLAN to insert at these terminals.
Description of drawings
Accompanying drawing 1 is the configuration diagram of mobile communications network described in the specific embodiment of the invention.
Accompanying drawing 2 is step sketch mapes that switch to WLAN from the radio honeycomb Access Network at the terminal in the specific embodiment of the invention.
Accompanying drawing 3 is step sketch mapes that switch to the radio honeycomb Access Network from WLAN at the terminal in the specific embodiment of the invention.
Accompanying drawing 4 to 9 is the described switch step sketch mapes of six embodiment of the present invention.
Embodiment
Elaborate below in conjunction with the embodiment of accompanying drawing to mobile communications network provided by the invention and the terminal changing method between WLAN and radio honeycomb Access Network.
The core net of indication of the present invention is the mobile core network of 3GPP tissue and 3GPP2 definition.The WLAN access technology of indication of the present invention comprises uses WiFi (802.11 series standard), WiMax (802.16 series standard) and bluetooth (Bluetooth) to be linked into the access way of broadband IP network.
At first combine accompanying drawing to provide the embodiment of mobile communications network according to the invention.With reference to being the configuration diagram of the said communication network of this embodiment shown in the accompanying drawing 1, comprising core net 10, access to WLAN 11, radio honeycomb Access Network 12, WLAN IAD 13 and the terminal 19 of core net 10.Said WLAN 11 accesses to core net 10 through WLAN IAD 13; 10 further comprise a packet data gateway 101 in the said core net, and the terminal that is in the said WLAN 11 accesses to said packet data gateway 101 through WLAN IAD 13.
In this embodiment, the data channel between said WLAN IAD 13 and the terminal 19 is the IPSEC passage, through parameters such as IKEv2 protocol negotiation IPSEC keys.In other execution mode, above-mentioned data channel between the two also can be to adopt the data channel with fail safe of other any protocol definitions.
In this embodiment, said packet data gateway 101 is gateway devices of realizing moving Packet Service and the exchange of external business network data in the mobile core network, is selected from a kind of of Gateway GPRS Support Node or packet data network gateway.
In the described network of this embodiment,, guaranteed that terminal 19 can keep the IP address constant when roaming in the WLAN 11 through WLAN IAD 13 is set.Proxy-mobile IP (PMIP) module is set in WLAN IAD 13, can further initiates to adopt switching, guarantee that the IP address at terminal 19 remains unchanged in handoff procedure based on the proxy-mobile IP pattern.Proxy-mobile IP provides a kind of IP routing mechanism for the mobile subscriber, makes to support the terminal of proxy-mobile IP to be connected on any link through self identification.
Next combine accompanying drawing to provide the embodiment of terminal switching method according to the invention.
Be that next the terminal elaborates to the step shown in the accompanying drawing 2 from the step sketch map of radio honeycomb Access Network to the WLAN switching in this embodiment shown in the accompanying drawing 2.
S20: whether have the IP security protocol passage between terminal inspection self and the WLAN IAD.
When the terminal detects the WLAN signal, judgement need connect business switch to WLAN and insert the time, and whether the terminal inspection has existed IPSEC SA.If exist then execution in step S21, require to set up service channel between WLAN IAD and the packet data gateway; If do not exist then execution in step S24, rebulid the safe data channel between terminal and the WLAN IAD.
S21: internet key exchange protocol information request (the IKEv2 Informational Request) message that does not comprise load information is sent to the WLAN IAD in the terminal, is used to trigger the service channel that the WLAN IAD is established to packet data gateway.
S22: after the WLAN IAD was received described request information, whether the security association (IPSEC SA) between inspection and the terminal was effective, as effectively, and execution in step S25 then, otherwise execution in step S23.
The step of this verification can be avoided under the invalid situation of the data channel between terminal and the WLAN IAD, initiating to set up the step of setting up service channel between WLAN IAD and the packet data gateway, has reduced the operating pressure of core net.
S23: the WLAN IAD returns internet key exchange protocol information response (the IKEv2 Informational Response) message that comprises notification payload information (Notify payload) to the terminal; Indication SPI (Security Parameter Index, Security Parameter Index) is invalid.
After IKEv2 Informational Response is received at the terminal, can select to delete IPSEC SA.
S24: the terminal uses complete internet key exchange protocol (IKEv2) process to set up the safe data channel between self and the WLAN IAD; And accomplish the foundation of service channel between WLAN IAD and the packet data gateway, change execution in step S26 over to.
At first the access request that does not comprise load information is sent at the terminal to the WLAN IAD; The WLAN IAD receives and inserts the request back to being arranged on AAA server/home subscriber server initiation subscription authentication request; AAA server/home subscriber server receives after the authentication request compute authentication parameter and returns Authentication Response; The authentication parameter that the WLAN IAD returns according to AAA server/home subscriber server is to the corresponding authentication parameter of terminal request; Corresponding authentication parameter to WLAN IAD is returned at the terminal; The WLAN IAD carries out authentication according to said Authentication Response and said terminal authentication parameter that said aaa server/home subscriber server returns; Set up initial IPSEC SA between said terminal and the said WLAN IAD after the completion authentication; The request of access is sent to the WLAN IAD in the terminal after the foundation of initial IPSEC SA; After the WLAN IAD is received the request of access; Through binding handover scheme based on the link establishment handover scheme of simple IP or based on the proxy-mobile IP of proxy-mobile IP; Accomplish the foundation of service channel between WLAN IAD and the packet data gateway; After the terminal switches to the WLAN IAD, can keep original IP address constant.
S25: set up service channel between WLAN IAD and the packet data gateway, accomplish the terminal and switch to the business that WLAN inserts.
After the WLAN IAD is received IKEv2 Informational Request,, can select to initiate request for building link to the packet data gateway of core net if it is still effective to be checked through IPSEC SA; The packet data gateway return link is set up response; Packet data gateway can trigger the dispose procedure of the airlink at original radio honeycomb Access Network service channel and terminal after return link is set up response; The WLAN IAD sends the IKEv2 Informational Response message that does not comprise load information after receiving the link establishment success response that packet data gateway returns to the terminal; After message is received at the terminal, can think that having completed successfully the business that inserts to WLAN switches, data service can continue to use.Above method is based on the handover scheme of simple IP, and the terminal can keep original IP address constant after switching to the WLAN IAD.
If it is still effective that the WLAN IAD is checked through IPSEC SA, also can select to initiate the proxy-mobile IP binding update messages to the packet data gateway of core net; Packet data gateway returns proxy-mobile IP to the WLAN IAD and binds response message; And recall request message to radio honeycomb access network access controller or Service Gateway initiation mobile IP agent simultaneously, trigger the air-link resources of release of radio honeycomb access network access controller or Service Gateway and terminal room; Radio honeycomb access network access controller or Service Gateway are recalled response message with the proxy-mobile IP binding and are sent to packet data gateway; The WLAN IAD sends the IKEv2 Informational Response message that does not comprise load information after receiving that proxy-mobile IP that packet data gateway returns is bound response message to the terminal; After message is received at the terminal, can think that having completed successfully the business that inserts to WLAN switches, data service can continue to use.Above method is based on the handover scheme of proxy-mobile IP, and the terminal can keep original IP address constant after the scheme that adopts proxy-mobile IP to bind switches to the WLAN IAD.Radio honeycomb access network access controller or Service Gateway are the controller or the gateways of radio honeycomb Access Network, realize the Radio Resource of radio honeycomb Access Network is controlled and managed; Carry out session interaction with the terminal, make the user use the radio honeycomb Access Network, can be linked into mobile core network through said controller or gateway.
S26: the service channel between packet data gateway release and the radio honeycomb Access Network.
Be that next the terminal elaborates to the step shown in the accompanying drawing 3 from the step sketch map of WLAN to the switching of radio honeycomb Access Network in this embodiment shown in the accompanying drawing 3.
S30: packet data gateway is after the service channel between completion and the radio honeycomb Access Network is set up, and transmission information notice WLAN IAD discharges the service channel between WLAN IAD and the packet data gateway.
When the terminal judgement need switch to the access of mobile wireless honeycomb with the business connection; Terminal and radio honeycomb Access Network are mutual; Trigger the link establishment process that airlink is set up and arrived the packet data gateway of core net, set up the service channel of radio honeycomb Access Network to the packet data gateway of core net.After the packet data gateway completion of core net and the service channel of radio honeycomb Access Network were set up, notice WLAN IAD discharged original service channel, and the WLAN IAD returns service channel and discharges response.
When the terminal judgement need switch to the access of mobile wireless honeycomb with the business connection, radio honeycomb access network access controller or Service Gateway can be selected to initiate request for building link to packet data gateway; Behind the link between packet data gateway foundation and radio honeycomb access network access controller or the Service Gateway, return link is set up success response, and sends link release request message to the WLAN IAD simultaneously; Radio honeycomb access network access controller or Service Gateway send the message of successfully setting up data channel after receiving the link establishment success response that packet data gateway returns to the terminal.Above method is based on the handover scheme of simple IP, and the terminal can keep original IP address constant after switching to the access of mobile wireless honeycomb.
When the terminal judgement need switch to the access of mobile wireless honeycomb with the business connection, radio honeycomb access network access controller or Service Gateway also can be selected to initiate the proxy-mobile IP binding update messages to packet data gateway; Packet data gateway returns proxy-mobile IP binding response message to said radio honeycomb access network access controller or Service Gateway, and initiates the proxy-mobile IP binding to the WLAN IAD simultaneously and recall request message; The WLAN IAD is recalled response message with the proxy-mobile IP binding and is sent to said packet data gateway.Above method is based on the handover scheme of proxy-mobile IP, and the terminal can keep original IP address constant after the scheme that adopts proxy-mobile IP to bind switches to the access of mobile wireless honeycomb.
S31: the WLAN IAD need to judge whether the security association of release and terminal room.
Whether the WLAN IAD will discharge the security association between WLAN IAD and the terminal according to cell in the packet data gateway institute photos and sending messages of receiving or the configuration of self decision.Discharge if desired, then steps performed S32 discharges as not needing, then execution in step S33.
S32: the WLAN IAD sends to the terminal and comprises the internet key exchange protocol information request message of deleting load information; The WLAN IAD is deleted the security association with terminal room after sending message or after receiving the response message that returns at the terminal.
If release IP SEC SA, the WLAN IAD is initiated IKEv2 Informational Request message to the terminal and is carried Delete Payload, notice terminal deletion IPSEC SA and associated safety tunnel.
S33: the WLAN IAD periodically sends the internet key exchange protocol information request message to the terminal, to keep security association each other.
If do not require release IP SEC SA; The WLAN IAD can be according to the IPSEC SA existence timer of setting; Periodically send the IKEv2 Informational Request message that does not comprise load information, to keep the state of activation of IPSEC SA between WLAN IAD and the terminal to the terminal.
S34: after request message was received at the terminal, it was effective to be checked through security association, then returned the response message that does not comprise load information; If it is invalid to be checked through security association, then return the response message that comprises notification payload information to the terminal, the indication Security Parameter Index is invalid.
After the internet key exchange protocol information request message of WLAN IAD transmission is received at the terminal; It is effective to be checked through IPSEC SA, then returns internet key exchange protocol information response (the IKEv2 Informational Response) message that does not comprise load information; If it is invalid to be checked through IPSEC SA, then return the IKEv2 Informational Response message that comprises notification payload information (Notify payload) to the terminal, indication Security Parameter Index (SPI) is invalid.
S35: if WLAN IAD continuous several times is not received the response message at terminal; Perhaps receive the response message that comprises notification payload information that the terminal is returned; Should delete and said terminal between security association, and stop to send periodic request information to said terminal.
If WLAN IAD continuous several times is not received the IKEv2 Informational Response message at terminal, then the WLAN IAD is deleted IPSEC SA, and stops to send periodic request message to said terminal.If the WLAN IAD has been received the IKEv2 Informational Response message that comprises notification payload information, can select to delete IPSEC SA, stop to send periodic request information to said terminal.After this, insert if WLAN is switched back at the terminal again, flow process is with reference to aforementioned.
The present invention has increased the WLAN IAD in existing network; Existing mobile core network had no other change demand; Through in WLAN IAD deploy proxy-mobile IP (PMIP) function; Deployment that can adaptive subsequent movement IP, the roaming range that extends one's service.
Next provide a plurality of embodiment of technique scheme.
The Chinese implication of english abbreviation that adopts in following examples and English narration correspondence is following:
3GPP (The 3rd Generation Partnership Project, third generation partner program);
AAA server (Authentication Authorization Accounting Server, checking, authorization and accounting server);
EAP (Extensible Authentication Protocol, Extensible Authentication Protocol);
EPC network (Evolved Packet Core Network, the packet-based core networks of evolution);
FMC (Fixed Mobile Convergence is admittedly move fusion);
GGSN (Gateway GPRS Support Node, Gateway GPRS Support Node);
HSS (Home Subscriber Server, home subscriber server);
IKEv2 (Internet Key Exchange version 2, internet key exchange protocol the 2nd edition);
IP (Internet Protocol, procotol);
IPSEC (IP Security, IP security protocol);
LTE (Long Term Evolution, Long Term Evolution);
MIP (Mobile Internet Protocol moves IP);
PMIP (Proxy Mobile Internet Protocol, proxy-mobile IP);
PDN GW (Packet Data Network Gateway, packet data network gateway);
PDSN (Packet Data Support Node, packet data support node);
PPP (Point to Point Protocol, point to point protocol);
RFC (Request For Comments, request comment);
SA (Security Association, security association);
SPI (Security Parameters Index, Security Parameter Index);
Wi-Fi (Wireless Fidelity, wireless compatibility authentication);
WiMax (Worldwide Interoperability for Microwave Access, worldwide interoperability for microwave inserts)
WLAN (Wireless Local Area Networks, WLAN);
Delete Payload (deletion load);
A11 Reg Request (A11 login request message);
A11 Reg Reply (A11 registration reply message);
A11-Registration Update (A11 recalls updating message);
A11-Registration Ack (A11 recalls response message);
A11-Registration Req (lifetme=0) (A11 recalls request message (life cycle=0));
A11-Registration Reply (A11 recalls response message);
Informational Request (informedness request);
Informational Response (informedness response);
IKE_SA_INIT (internet key exchange _ Security Association _ initialization);
IKE_AUTH_REQUEST (internet key exchange _ authentication _ request);
IKE_AUTH_RESPONSE (internet key exchange _ authentication _ response);
Binding Revocation Request (request is recalled in binding);
Binding Revocation Ack (binding is recalled and replied);
PMIP Binding Update (PMIP Binding Update);
PMIP Binding Ack (PMIP binds response).
Embodiment one
Fig. 4 is the step sketch map of present embodiment.The radio honeycomb Access Network that present embodiment is based on simple IP inserts the flow process that switches to the WLAN access, and this process need consult to set up corresponding to not having IPSEC SA between terminal and the WLAN IAD through the IKEv2 process again.
The terminal connects between the packet data gateway through radio honeycomb Access Network and core net, is using data service.When the terminal detects wireless lan signal, judgement need connect business switch to WLAN and insert the time, and at first IKE SA initial message is sent to the WLAN IAD in the terminal; The WLAN IAD receives and inserts the request back to AAA server/home subscriber server initiation subscription authentication request; AAA server/home subscriber server receives after the authentication request compute authentication parameter and returns Authentication Response; The authentication parameter that the WLAN IAD returns according to AAA server/home subscriber server is to the corresponding authentication parameter of terminal request; Corresponding authentication parameter is returned at the terminal; Authentication parameter that home subscriber server returns according to AAA server/home subscriber server and terminal are returned authentication parameter and are carried out authentication; Accomplish the foundation of initial IPSEC SA after the authentication between terminal and the WLAN IAD; The request of access is sent to the WLAN IAD in the terminal after the foundation of initial IPSEC SA; After the WLAN IAD is received the request of access, initiate request for building link to the packet data gateway of core net; The packet data gateway of core net is set up response to WLAN IAD return link after receiving said request for building link, thereby the Business Stream at terminal is switched to the WLAN IAD from the radio honeycomb Access Network; The packet data gateway of core net can trigger the dispose procedure of the airlink between original radio honeycomb Access Network service channel and the terminal after WLAN IAD return link is set up response; The WLAN IAD sends the IKE Authentication Response to the terminal after receiving the link establishment response of successful that the packet data gateway of core net returns.After said informedness response message is received at the terminal, think promptly to have completed successfully business switching that data service can continue to use to WLAN.
3GPP, 3GPP2 core net or EPC (packet-based core networks of evolution) are inserted through the radio honeycomb Access Network in the terminal; Accomplish access authentication; Set up the service bearer passage, the business network that access operator provides, the method that obtains business service is abideed by 3GPP and the existing standard of 3GPP2.
3GPP, 3GPP2 core net or EPC are inserted through WLAN in the terminal; Be to set up IPSEC SA through IKEv2 agreement and WLAN IAD; Insert 3GPP, 3GPP2 core net or EPC via the WLAN IAD; The business network that access operator provides obtains business service.Accomplish authentication between terminal and WLAN IAD, the AAA server/home subscriber server, consult to set up the existing standard of the method for SA (Security Association) with reference to 3GPP and RFC.IKEv2 process between terminal and WLAN IAD meets the RFC related specifications, like RFC4306.
Embodiment two
Fig. 5 is the step sketch map of present embodiment.Present embodiment is the terminal switches to the access of radio honeycomb Access Network based on the WLAN access of simple IP a flow process.
The terminal connects between the packet data gateway through WLAN and core net, is using business.When the terminal judgement need switch to the radio honeycomb Access Network with the business connection; Terminal and radio honeycomb Access Network are mutual; Trigger the link establishment process that airlink is set up and arrived the packet data gateway of core net, set up the service channel of radio honeycomb Access Network to the packet data gateway of core net; After the packet data gateway completion of core net and the service channel of radio honeycomb Access Network were set up, notice WLAN IAD discharged original service channel, and the WLAN IAD returns service channel and discharges response; The terminal has been accomplished to the business of radio honeycomb Access Network and has been switched, and data service can continue to use.
The WLAN IAD can judge whether to want release IP SEC SA according to the cell in the packet data gateway release message of core net, perhaps whether wants release IP SEC SA according to the configuration decision.
If release IP SEC SA, the WLAN IAD is initiated Informational Request message (informedness request) to the terminal and is carried Delete Payload (deletion load), notice terminal deletion IKE SA and associated safety tunnel.If do not require release IP SEC SA; The WLAN IAD can be according to the IPSEC SA existence timer of setting; Periodically send the Informational Request message that does not comprise load information, to keep the state of activation of IPSEC SA between WLAN IAD and the terminal to the terminal.After this message was received at the terminal, it was effective to be checked through IPSEC SA, then returned the Informational Response message (informedness response) that does not comprise load information; If it is invalid to be checked through IPSEC SA, then return the Informational Response message that comprises notification payload information (Notify payload) to the terminal, indication SPI (Security Parameter Index) is invalid.If the continuous several times of WLAN IAD are not received the Informational Response message at terminal, then the WLAN IAD is deleted IPSEC SA.If the WLAN IAD has been received the Informational Response message that comprises notification payload information, can select to delete IPSEC SA.After this, insert if WLAN is switched back at the terminal again, flow process is said with reference to figure 4.
Embodiment three
Fig. 6 is the step sketch map of present embodiment.Present embodiment is the terminal switches to the WLAN access based on the radio honeycomb Access Network access of PMIP (proxy-mobile IP) a flow process; This process is not corresponding to existing IPSEC SA between terminal and the WLAN IAD, need consult situation about setting up again through the IKEv2 process.
Interactive messages is different between the packet data gateway that the flow process difference that realizes based on PMIP and simple IP is core net and WLAN IAD; Radio honeycomb Access Network based on PMIP switches in the WLAN; The WLAN IAD is initiated PMIP Binding Update (PMIP Binding Update) message to the packet data gateway of core net, and the packet data gateway of core net returns PMIP to the WLAN IAD and binds response (PMIP Binding Ack) message.The packet data gateway of core net is initiated PMIP to the radio honeycomb Access Network and is recalled request (Binding Revocation Request) message, and the radio honeycomb Access Network returns PMIP to the packet data gateway of core net and recalls and reply (Binding Revocation Ack) message.Other process step is identical with Fig. 4, no longer is repeated in this description here.
Embodiment four
Fig. 7 is the step sketch map of present embodiment.Present embodiment is the terminal switches to the access of radio honeycomb Access Network based on the WLAN access of PMIP a flow process.
Interactive messages is different between the packet data gateway that the flow process difference that realizes based on PMIP and simple IP is core net and WLAN IAD; WLAN based on PMIP switches in the radio honeycomb Access Network; After the packet data gateway of core net receives that message is set up in the session of radio honeycomb Access Network; Initiate PMIP to the WLAN IAD and recall request (Binding Revocation Request) message, the WLAN IAD returns PMIP to the packet data gateway of core net and recalls and reply (Binding Revocation Ack) message.Other process step is identical with Fig. 5, no longer is repeated in this description here.
Embodiment five
Fig. 8 is the step sketch map for present embodiment.To be the terminal based on the radio honeycomb Access Network of simple IP insert present embodiment switches to the flow process that WLAN inserts, and reuses original IPSEC SA.
The terminal connects between the packet data gateway through radio honeycomb Access Network and core net, is using data service.When the terminal detects wireless lan signal, judgement need connect business switch to WLAN and insert the time, and at first information request (Information Request) message is sent to the WLAN IAD in the terminal; The WLAN IAD is initiated A11 login request message (A11 Reg Request) to the packet data gateway of core net after receiving information request; The packet data gateway of core net returns A11 registration reply message (A11 Reg Reply) to the WLAN IAD after receiving said request for building link; Thereby the Business Stream at terminal is switched to the WLAN IAD from the radio honeycomb Access Network; Promptly think to have completed successfully the business switching to WLAN, data service can continue to use; The packet data gateway of core net is after WLAN IAD return link is set up response; Initiate A11 to the radio honeycomb Access Network and recall updating message (A11-Registration Update); The radio honeycomb Access Network returns A11 to packet data gateway and recalls response message (A11-Registration Ack); Trigger the dispose procedure of the airlink between original radio honeycomb Access Network service channel and the terminal; The radio honeycomb Access Network is initiated A11 to packet data gateway and is recalled request message (life cycle=0) (A11-Registration Req (lifetme=0)) afterwards; Packet data gateway returns A11 to the radio honeycomb Access Network and recalls response message (A11-Registration Reply), discharges the service channel between packet data gateway and the radio honeycomb Access Network.
Embodiment six
Fig. 9 is the step sketch map for present embodiment.To be the terminal based on the radio honeycomb Access Network of PMIP insert present embodiment switches to the flow process that WLAN inserts, and reuses original IPSEC SA.
The terminal connects between the packet data gateway through radio honeycomb Access Network and core net, is using data service.When the terminal detects wireless lan signal, judgement need connect business switch to WLAN and insert the time, and at first information request (Information Request) message is sent to the WLAN IAD in the terminal; The WLAN IAD is initiated PMIP Binding Update (PMIP Binding Update) message to the packet data gateway of core net after receiving information request; The packet data gateway of core net returns PMIP to the WLAN IAD and binds response (PMIP Binding Ack) message, thereby the Business Stream at terminal is switched to the WLAN IAD from the radio honeycomb Access Network.The packet data gateway of core net is initiated PMIP to the radio honeycomb Access Network and is recalled request (Binding Revocation Request) message; Trigger the dispose procedure of the airlink between original radio honeycomb Access Network and the terminal, the radio honeycomb Access Network returns PMIP to the packet data gateway of core net and recalls and reply (Binding Revocation Ack) message afterwards.Promptly think to have completed successfully the business switching to WLAN, data service can continue to use.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (13)
1. mobile communications network; The WLAN IAD and the radio honeycomb Access Network that comprise core net, WLAN, the said core net of connection and said WLAN; It is characterized in that; Comprise a packet data gateway in the said core net, when the terminal is in the said WLAN, access to said packet data gateway through said WLAN IAD.
2. mobile communications network according to claim 1; It is characterized in that; When the terminal is in the said WLAN, manage the IP security protocol passage between said terminal and the gateway through internet key exchange protocol between said WLAN IAD and the said terminal.
3. mobile communications network according to claim 1; It is characterized in that; Further, said terminal switches to said WLAN from said radio honeycomb Access Network and inserts, and launches the security association between original said terminal and the said WLAN IAD; Said terminal switches to said radio honeycomb Access Network from said WLAN, the security association between reservation and the said WLAN IAD.
4. mobile communications network according to claim 1 is characterized in that, further comprises the proxy-mobile IP module in the said WLAN IAD.
5. changing method that is in the terminal in the said network of claim 1, switch to said WLAN from the radio honeycomb Access Network at said terminal, it is characterized in that, comprises the steps:
A) whether have the IP security protocol passage between said terminal inspection self and the said WLAN IAD, if existence, execution in step b then is not if exist then execution in step e;
B) the internet key exchange protocol information request message that does not comprise load information is sent to said WLAN IAD in said terminal, requires to set up service channel between said WLAN IAD and the said packet data gateway;
C) said WLAN IAD is received described request information, and whether the security association between inspection and the said terminal is effective, as effectively, and execution in step f then, otherwise execution in step d;
D) said WLAN IAD returns the internet key exchange protocol info response message that comprises notification payload information to said terminal, and the indication Security Parameter Index is invalid;
E) said terminal uses complete internet key exchange protocol process to set up the IP security protocol data channel between self and the said WLAN IAD; And accomplish the foundation of service channel between said WLAN IAD and the said packet data gateway, change execution in step h then over to);
F) set up service channel between said WLAN IAD and the said packet data gateway;
G) said WLAN IAD sends the internet key exchange protocol response message that does not comprise load information to said terminal, notifies said terminal switching process to accomplish;
H) service channel between said packet data gateway release and said radio honeycomb Access Network.
6. the method that switch between network at terminal according to claim 5; It is characterized in that; Among the said step e; Said terminal uses complete internet key exchange protocol process to set up the IP security protocol passage between self and the said WLAN IAD, further comprises the steps:
E1) request of access is sent to said WLAN IAD in said terminal;
E2) aaa server/home subscriber server of said WLAN IAD in being arranged on said core net initiated the subscription authentication request;
E3) said aaa server/home subscriber server receives after the said authentication request compute authentication parameter and returns Authentication Response;
E4) the said Authentication Response that returns according to said aaa server/home subscriber server of said WLAN IAD is to the authentication parameter at the said terminal of said terminal request;
E5) said terminal authentication parameter to said WLAN IAD is returned at said terminal;
E6) said WLAN IAD carries out authentication according to said Authentication Response and said terminal authentication parameter that said aaa server/home subscriber server returns;
E7) after the completion authentication, set up said IP security protocol passage between said terminal and the said WLAN IAD.
7. the method that switch between network at terminal according to claim 5 is characterized in that, said step f further comprises:
F11) said WLAN IAD is initiated request for building link to said packet data gateway;
F12) behind the link between said packet data gateway foundation and the said WLAN IAD, return link is set up success response, and discharges the service channel between the original and said radio honeycomb Access Network;
F13) after said WLAN IAD is received said link establishment success response, send the message of successfully setting up service channel to said terminal.
8. the method that switch between network at terminal according to claim 5 is characterized in that, said step f further comprises:
F21) said WLAN IAD is initiated the proxy-mobile IP binding update messages to said packet data gateway;
F22) said packet data gateway returns the agent binding response message to said WLAN IAD, and recalls request message to said radio honeycomb access network access controller or the binding of Service Gateway initiation proxy-mobile IP simultaneously;
F23) air-link resources of release of said radio honeycomb access network access controller or Service Gateway and said terminal room;
F24) said radio honeycomb access network access controller or Service Gateway are recalled response message with the proxy-mobile IP binding and are sent to said packet data gateway.
9. the changing method at the terminal in the said network of claim 1, switch to said radio honeycomb Access Network from said WLAN at said terminal, it is characterized in that, comprises the steps:
A) said packet data gateway is after the service channel between completion and the said radio honeycomb Access Network is set up, and transmission information is notified the service channel between said WLAN IAD release and the said packet data gateway;
B) whether said WLAN IAD will discharge the security association between said WLAN IAD and the said terminal according to cell in the said packet data gateway institute photos and sending messages or the configuration of self decision; Discharge if desired; Steps performed C then; As do not need to discharge execution in step D then;
C) said WLAN IAD sends the internet key exchange protocol information request message that comprises notification payload information to said terminal; Said WLAN IAD is deleted the security association with said terminal room after sending message or after receiving the response message that returns at said terminal;
D) said WLAN IAD periodically sends the internet key exchange protocol information request message to said terminal, to keep security association each other.
10. according to the changing method at the terminal in the said network of claim 9, it is characterized in that said steps A further comprises:
A11) radio honeycomb access network access controller or Service Gateway are initiated request for building link to said packet data gateway;
A12) behind the link between said packet data gateway foundation and said radio honeycomb access network access controller or the Service Gateway, return link is set up success response, and sends link release request message to said WLAN IAD simultaneously;
A13) after said radio honeycomb access network access controller or Service Gateway are received the link establishment success response that said packet data gateway returns, send the message of successfully setting up data channel to said terminal.
11. the changing method according to the terminal in the said network of claim 9 is characterized in that, said steps A further comprises:
A21) said radio honeycomb access network access controller or Service Gateway are initiated the proxy-mobile IP binding update messages to said packet data gateway;
A22) said packet data gateway returns proxy-mobile IP binding response message to said radio honeycomb access network access controller or Service Gateway, and initiates the proxy-mobile IP binding to said WLAN IAD simultaneously and recall request message;
A23) said WLAN IAD is recalled response message with the proxy-mobile IP binding and is sent to said packet data gateway.
12. changing method according to the terminal in the said network of claim 9; It is characterized in that; Said step D further comprises: said terminal checks whether said security association exists, if exist, the internet key exchange protocol info response message that does not comprise load information is returned at said terminal; If do not exist, the internet key exchange protocol info response message that comprises notification payload information is returned at said terminal, and the indication Security Parameter Index is invalid.
13. changing method according to the terminal in the said network of claim 9; It is characterized in that; Said step D further comprises: if said WLAN IAD continuous several times is not received the response message that said terminal is returned; Perhaps received the internet key exchange protocol info response message that comprises notification payload information, should delete and said terminal between security association, and stop to send periodic request message to said terminal.
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