CN101945391A - Method, device and system for selecting target access network for heterogeneous network intercommunicating entity - Google Patents
Method, device and system for selecting target access network for heterogeneous network intercommunicating entity Download PDFInfo
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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Abstract
The invention discloses a method, a device and a system for selecting a target access network for a heterogeneous network intercommunicating entity, and relates to the field of communication. The method, the device and the system solve the problem that the delay of switching UE to an access network served by the heterogeneous network intercommunicating entity through the heterogeneous network intercommunicating entity is high or the switching cannot be successfully performed when the heterogeneous network intercommunicating entity serves a plurality of access networks of the same type. According to the technical scheme provided by the invention, the method comprises the following steps of: receiving identification information of the target access network sent by the UE (user equipment); acquiring address information of an authenticator of the target access network according to the identification information of the target access network; and performing network access authentication operation on the UE through the authenticator according to the address information of the authenticator. The embodiment of the invention can be applied in the field of wireless communication.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of methods, devices and systems of heterogeneous network interconnection entity select target access network.
Background technology
At present, prior art provides two kinds to insert micro-wave access global inter communication connectivity serving network (WorldwideInteroperability for Microwave Access Connectivity Server Network, WiMAX CSN) method: a kind ofly be, insert by Wireless Fidelity access network (Wireless Fidelity Access Network, WiFi AN); Another kind is to insert by micro-wave access global inter communication access service network (WorldwideInteroperability for Microwave Access Access Service Network, WiMAX ASN).(User Equipment UE), can switch between described WiFi AN and WiMAX ASN the multimode subscriber equipment of support WiMAX and WiFi, inserts WiMAX CSN in different ways according to the practical communication needs.
Support the multimode UE of WiMAX and WiFi between WiFi AN and WiMAX ASN, to switch by the heterogeneous network interconnection entity.Concrete, when multimode UE is operated in injection pattern frequently, when WiFi AN switches to WiMAX ASN, the heterogeneous network interconnection entity is as WiMAX virtual base station (BasicStation, BS), UE by and the virtual BS of described WiMAX between the tunnel set up and the access service network gateway (ASN-GW) among the WiMAX ASN carry out Signalling exchange, finish initial network entry operations such as pre-authentication, UE sends instruction to the virtual BS of WiMAX then, switches to BS actual the WiMAXASN from the virtual BS of WiMAX; In like manner, when UE need be when WiMAX ASN switches to WiFi AN, the heterogeneous network interconnection entity is as WiFi virtual access point (Access Point, AP), UE by and described WiFi virtual AP between the tunnel set up and the authenticator among the WiFi AN carry out Signalling exchange, finish initial network entry operations such as pre-authentication, UE sends instruction to the WiFi virtual AP then, switches to AP actual the WiFi AN from the WiFi virtual AP.
In realizing process of the present invention, the inventor finds, when the heterogeneous network interconnection entity is served a plurality of WiMAX ASN or WiFi AN, and described heterogeneous network interconnection entity and WiMAX ASN or WiFi AN grappling.When target WiMAX BS that UE desires to switch to not with the WiMAXASN of heterogeneous network interconnection entity grappling in the time, the delay that UE switches is longer, influences user's communications and experiences; When target WiFi AP that UE desires to switch to not with the WiFi AN of heterogeneous network interconnection entity grappling in the time, UE can't carry out network by the heterogeneous network interconnection entity and switch.
Summary of the invention
Given this, embodiments of the invention provide a kind of methods, devices and systems of heterogeneous network interconnection entity select target access network, can reduce the network switching delay, and guarantee to switch and can carry out smoothly.
Embodiments of the invention adopt following technical scheme:
A kind of method of heterogeneous network interconnection entity select target access network comprises: the identification information that receives the target access network of subscriber equipment transmission; According to the identification information of described target access network, obtain the address information of the authenticator of described target access network; According to the address information of described authenticator, with described subscriber equipment by the described authenticator authentication operation that networks.
A kind of heterogeneous network interconnection entity comprises:
Receiving element is used to receive the identification information of the target access network that subscriber equipment sends;
Acquiring unit is used for the identification information according to the target access network of described receiving element reception, obtains the address information of the authenticator of described target access network;
Operating unit is used for the address information of the authenticator that obtains according to described acquiring unit, with described subscriber equipment by the described authenticator authentication operation that networks.
A kind of communication system comprises: the heterogeneous network interconnection entity, and described heterogeneous network interconnection entity links to each other with subscriber equipment in the mode that can communicate by letter;
Described heterogeneous network interconnection entity, be used to receive the identification information of the target access network that described subscriber equipment sends, identification information according to described target access network, obtain the address information of the authenticator of described target access network, according to the address information of described authenticator, with described subscriber equipment by the described authenticator authentication operation that networks.
The method of the heterogeneous network interconnection entity select target access network that the embodiment of the invention provides, device and system, the heterogeneous network interconnection entity can receive the identification information of the target access network of subscriber equipment transmission, and obtain the address information of the authenticator of target access network according to the identification information of described target access network, thereby make the subscriber equipment authentication operation that can network by the authenticator of target access network, insert target access network, heterogeneous network interconnection entity and an access network grappling in the prior art have been solved, when subscriber equipment target access network to be accessed is not access network with the grappling of heterogeneous network interconnection entity, it is longer that subscriber equipment carries out the delay that network switches, it is poor that telex network is experienced, the perhaps problem that subscriber equipment can't access network, the technical scheme that the embodiment of the invention provides can reduce the network switching delay, improve user's communications and experience, guarantee to switch and to carry out smoothly.
Description of drawings
In order to be illustrated more clearly in the technical scheme of the embodiment of the invention, the accompanying drawing of required use is done to introduce simply in will describing embodiment below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
The method flow diagram of the heterogeneous network interconnection entity select target access network that Fig. 1 provides for the embodiment of the invention;
The method sequential chart of the heterogeneous network interconnection entity select target access network that Fig. 2 provides for another embodiment of the present invention;
The method sequential chart of the heterogeneous network interconnection entity select target access network that Fig. 3 provides for further embodiment of this invention;
The method sequential chart of the heterogeneous network interconnection entity select target access network that Fig. 4 provides for yet another embodiment of the invention;
The method sequential chart of the heterogeneous network interconnection entity select target access network that Fig. 5 provides for yet another embodiment of the invention;
The heterogeneous network interconnection entity structural representation that Fig. 6 provides for the embodiment of the invention;
The structural representation of acquiring unit in the heterogeneous network interconnection entity that Fig. 7 provides for the embodiment of the invention shown in Figure 6;
The structural representation of operating unit in the heterogeneous network interconnection entity that Fig. 8 provides for the embodiment of the invention shown in Figure 6.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
When serving the access network of a plurality of same types in order to solve the heterogeneous network interconnection entity, subscriber equipment switches to its service by described heterogeneous network interconnection entity the delay of access network is bigger, perhaps switch the problem that can not carry out smoothly, the embodiment of the invention provides a kind of methods, devices and systems of heterogeneous network interconnection entity select target access network.
As shown in Figure 1, when UE need be when the source access network switches to target access network, the method for the heterogeneous network interconnection entity select target access network that the embodiment of the invention provides comprises:
In the present embodiment, the source access network can be WiFiAN, and target access network can be WiMAXASN; Perhaps, the source access network can be WiMAX ASN, and target access network can be WiFi AN.
When target access network is WiMAX ASN, the identification information of target access network is sign (the Basic Station ID of base station, BSID) or the identification information of authenticator, this identification information can be included in the header field or load of message that subscriber equipment sends to the heterogeneous network interconnection entity;
When target access network is WiFi AN, the identification information of target access network is basic service set identification (the Basic Service Set ID of access point, BSSID) or mobile domains sign (Mobile Domain ID, MDID), this identification information can be included in the header field or load of message that subscriber equipment sends to the heterogeneous network interconnection entity.
When target access network was WiMAXASN, the authenticator of target access network was on ASN-GW, and the address information of the authenticator of target access network is the IP address of ASN-GW; When target access network is WiFi AN, the authenticator of target access network AP or access controller (Access Controller, AC) on, the address information of the authenticator of target access network is the IP address of AP or AC.
In the present embodiment, the heterogeneous network interconnection entity can obtain the address information of the authenticator of target access network by the following method:
The heterogeneous network interconnection entity is according to the identification information of the target access network that receives in the step 101, and the corresponding relation of the address information of the identification information of the target access network of setting up in advance and authenticator, obtains the address information of the authenticator of target access network.
Particularly, when target access network was WiMAX ASN, the access device of target access network was BS, and the identification information of target access network is the BSID of BS or the identification information of ASN-GW.The heterogeneous network interconnection entity can be from the information server of this locality or network side the IP address of the pairing authenticator of identification information of query aim access network; Perhaps, URL (the Uniform Resource Locator that the heterogeneous network interconnection entity can produce according to the identification information of target access network, URL), (Domain Name System DNS) inquires about the IP address that obtains corresponding authenticator to the dns server of network side with DNS Protocol.
In the present embodiment, the heterogeneous network interconnection entity establishes the mapping relations table (as shown in table 1) of BSID and ASN-GW IP address in advance on the information server of this locality or network side, the heterogeneous network interconnection entity is inquired about this table, obtains the IP address of the ASN-GW of BSID correspondence.
Table 1:
In the present embodiment, after the selected BS of UE, can obtain the broadcast of described BS, from described broadcast, obtain the identification information of the ASN-GW of target access network, then, the identification information with the ASN-GW of described target access network sends to the heterogeneous network interconnection entity by dedicated signaling or other message.Heterogeneous network interconnection entity the inquiry identification information of pre-established ASN-GW and the mapping relations table of ASN-GW IP address on the information server of this locality or network side obtain the IP address of ASN-GW of the sign correspondence of ASN-GW.
When target access network was WiFi AN, the access device of target access network was AP, and the identification information of target access network is the BSSID of AP or the MDID of AP place WiFi AN.Authenticator is on AP or access controller AC, and the address information of the authenticator of target access network is the IP address of AP or AC.The heterogeneous network interconnection entity can obtain the corresponding relation between BSSID/MDID and the authenticator IP address from the information server of this locality or network side, particularly, if have only an authenticator in the target access network, corresponding relation between described BSSID/MDID and the authenticator can be according to the mapping relations table of the IP address of BSSID as shown in table 2 and authenticator, perhaps the one-to-one relationship of MDID and authenticator IP address is obtained, if a plurality of authenticators (all being provided with authenticator on each AP) are arranged in the target access network, the corresponding relation between described AP and the authenticator IP address can obtain according to the one-to-one relationship of BSSID and authenticator IP address.
Table 2:
Only for giving an example, the heterogeneous network interconnection entity can also obtain the authenticator address of target access network by additive method to above method, every kind of situation is not given unnecessary details one by one herein.
At first, the heterogeneous network interconnection entity is set up the corresponding relation between UE and the authenticator according to the address information of the authenticator that obtains in the step 102.
Particularly, the heterogeneous network interconnection entity can be set up the corresponding relation between UE and the authenticator according to the address information of the authenticator that obtains in the step 102 and the UE information of obtaining in advance (as MAC Address of UE etc.); Further, when target access network is WiMAX ASN, at the heterogeneous network interconnection entity is after UE distributes Basic CID, the heterogeneous network interconnection entity can be set up the corresponding relation between UE and the authenticator according to the address information and the described Basic CID of the authenticator that obtains in the step 102.
Then, the heterogeneous network interconnection entity is linked into target access network according to the corresponding relation between UE and the authenticator with UE.
Particularly, the heterogeneous network interconnection entity can be according to the corresponding relation between UE and the authenticator, and the authenticator that the mutual signaling that UE is sent is transferred to target access network is carried out initial network entry operations such as pre-authentication to described UE by described authenticator; After authentication was passed through, the heterogeneous network interconnection entity received the switching command that UE sends, and UE is switched on the access device in the target access network.
The method of the heterogeneous network interconnection entity select target access network that the embodiment of the invention provides, the heterogeneous network interconnection entity can receive the identification information of the target access network of UE transmission, and obtain the address information of the authenticator of target access network according to the identification information of described target access network, thereby make the UE authentication operation that can network by the authenticator of described target access network, insert target access network, heterogeneous network interconnection entity and an access network grappling in the prior art have been solved, when UE target access network to be accessed is not access network with the grappling of heterogeneous network interconnection entity, it is longer that UE carries out the delay that network switches, it is poor that telex network is experienced, the perhaps problem that UE can't access network, the technical scheme that the embodiment of the invention provides can reduce the network switching delay, improve user's communications and experience, guarantee to switch and to carry out smoothly.
In order to make those skilled in the art can more be expressly understood the technical scheme that the embodiment of the invention provides, below by specific embodiment, the method for the heterogeneous network interconnection entity select target access network that the embodiment of the invention is provided is elaborated.
In another embodiment provided by the invention, UE is for supporting the multimode terminal of WiMAX and WiFi, UE is linked into WiMAX CSN by WiFi AN, when UE need switch to WiMAX ASN from WiFi AN by WiMAX heterogeneous network interconnection entity, when being linked into WiMAX CSN by WiMAX ASN, as shown in Figure 2, the method for the heterogeneous network interconnection entity select target access network that the employing embodiment of the invention provides switches to WiMAX ASN with UE from WiFi AN, comprising:
Step 201, UE chooses target BS to be accessed, comprising: UE is according to the BS signal strength signal intensity that scans, and choosing the best BS of signal strength signal intensity is target BS to be accessed; Perhaps, UE is according to scanning time of BS signal, and the BS that chooses the BS signal correspondence that receives at first is a target BS to be accessed etc.Certainly, the embodiment of the invention is not limited to adopt aforesaid way to choose target BS to be accessed.
Step 202, UE finds WiMAX heterogeneous network interconnection entity.
Step 203, UE and WiMAX heterogeneous network interconnection entity are set up the tunnel.
In this step, the BSID of the target BS that UE can choose step 201 sets up the message of transmitting in the tunneling process by dedicated signaling or UE and WiMAX heterogeneous network interconnection entity, sends to WiMAX heterogeneous network interconnection entity.Need to prove that if UE sends the BSID of target BS by dedicated signaling to WiMAX heterogeneous network interconnection entity, then described dedicated signaling can send before or after step 203.
Step 204, WiMAX heterogeneous network interconnection entity are obtained the IP address of the ASN-GW of UE WiMAX ASN to be accessed, comprising:
WiMAX heterogeneous network interconnection entity obtains the mapping table (as shown in table 1) of BSID and ASN-GW from the information server of this locality or network side; The BSID of the target BS that WiMAX heterogeneous network interconnection entity sends according to UE in the step 203, the IP address that from the mapping table of described BSID and ASN-GW, obtains the corresponding ASN-GW of target BS;
Perhaps, WiMAX heterogeneous network interconnection entity obtains the address information of the authenticator of target access network with the DNS Protocol inquiry according to the URL of the identification information generation of described target access network.
Step 205, WiMAX heterogeneous network interconnection entity be according to the IP address of ASN-GW, sets up the corresponding relation between the ASN-GW of UE and WiMAX ASN to be accessed.
Particularly, WiMAX heterogeneous network interconnection entity can be set up corresponding relation between the ASN-GW of UE and WiMAX ASN to be accessed according to the IP address of the ASN-GW that obtains in UE information of obtaining in advance (as the MAC Address of UE or IP address etc.) and the step 204.
Step 206, the corresponding relation between the ASN-GW of UE that sets up according to step 205 and WiMAX ASN to be accessed, UE finishes initial network entry by the ASN-GW of WiMAX heterogeneous network interconnection entity and WiMAXASN to be accessed.
In this step, WiMAX heterogeneous network interconnection entity is as the virtual BS of WiMAX ASN, for UE distributes Basic CID, the IP address of the ASN-GW of the WiMAXASN that the UE that obtains according to described Basic CID and step 204 is to be accessed, set up the corresponding relation of the ASN-GW of UE and WiMAXASN to be accessed, tunnel and UE that WiMAX heterogeneous network interconnection entity is set up by step 203 carry out Signalling exchange, and adopt described Basic CID that mutual information is identified, WiMAX heterogeneous network interconnection entity is according to the corresponding relation of the ASN-GW of UE and WiMAXASN to be accessed, finishes the initial network entry of UE with described ASN-GW.
Step 207, UE switches to the target BS of choosing the step 201 from WiMAX heterogeneous network interconnection entity.
Step 208, UE and WiMAX heterogeneous network interconnection entity are removed the tunnel.
Step 209, UE opens the WiMAX radio frequency.
Step 210, UE finishes network re-entry in target BS.
Step 211, UE carries out mobile IP registration to the ASN-GW of WiMAXASN to be accessed.
Alternatively, in the present embodiment, after the step 201, can also comprise before the step 204: the broadcast that UE receiving target BS sends, from described broadcast, obtain the identification information of the ASN-GW of UE WiMAX ASN to be accessed, by dedicated signaling or other message (message of transmitting when setting up the tunnel etc.) as UE and WiMAX heterogeneous network interconnection entity with as described in the identification information of ASN-GW of UE WiMAX ASN to be accessed send to WiMAX heterogeneous network interconnection entity.
The method of the heterogeneous network interconnection entity select target access network that the embodiment of the invention provides, WiMAX heterogeneous network interconnection entity can receive the BSID of the target BS that UE sends or the identification information of ASN-GW, and obtain the address information of the ASN-GW of WiMAX ASN to be accessed according to the identification information of described BSID or ASN-GW, thereby make the UE authentication operation that can network by the ASN-GW of WiMAX ASN to be accessed, insert among the described WiMAX ASN to be accessed, heterogeneous network interconnection entity and an access network grappling in the prior art have been solved, when UE target access network to be accessed is not access network with the grappling of heterogeneous network interconnection entity, it is longer that UE carries out the delay that network switches, it is poor that telex network is experienced, the perhaps problem that UE can't access network, the technical scheme that the embodiment of the invention provides can reduce the network switching delay, improves user's communications and experiences.
In another embodiment provided by the invention, UE is for supporting the multimode terminal of WiMAX and WiFi, UE is linked into WiMAX CSN by WiMAXASN, UE need switch to WiFi AN from WiMAX ASN by WiFi heterogeneous network interconnection entity, be linked into WiMAX CSN by WiFi AN, wherein, AP among the WiFi AN supports the 802.11-2007 agreement, and each AP all has authenticator, as shown in Figure 3, the method of the heterogeneous network interconnection entity select target access network that the employing embodiment of the invention provides switches to WiFi AN with UE from WiMAXASN, comprising:
Step 301, UE finds WiFi heterogeneous network interconnection entity.
Step 302 is set up the tunnel between UE and the WiFi heterogeneous network interconnection entity, to transmit 802.11 mac frame.After the tunnel was set up, WiFi heterogeneous network interconnection entity was as a virtual AP (carrying virtual authenticator) work, and the message between it and the UE adopts the tunnel transmission, in the tunnel in the data format of transmission can for:
| IP?header | Tunnel?header | 802.11?MAC?Frame |
Wherein, the IP address among the IP header is to reach the IP address of UE in the IP address of the WiFi of public network addressing heterogeneous network interconnection entity; Tunnel header depends on the tunnel protocol of employing, if use GRE, then is GRE header; The mac frame of 802.11 forms that WiFi module that 802.11 MAC Frame is UE to be equipped with and WiFi heterogeneous network interconnection entity produce.
Step 303, UE finishes the initial network entry process of WiFi AN on virtual AP (WiFi heterogeneous network interconnection entity), comprising:
At first, carry out open system authentication between UE and the virtual AP, open system authentication is made up of two message, and UE sends a request message that comprises self ID, the response message of a success of the direct loopback of virtual AP to virtual AP;
Then, UE sets up related with virtual AP;
At last, carry out 802.1x EAP authentication between the authenticator of UE and virtual AP and comprise: UE passes to the authenticator of virtual AP with message identifying by the tunnel, has set up MSK (master session key) between UE and the certificate server.Certificate server passes to authenticator with MSK.Carry out between subscriber equipment and the authenticator shaking hands for 4 times, set up PTK (pair temporal key).
Step 304, UE carries out pre-authentication process according to pre-authentication process in the 802.11-2007 standard and target AP, comprising:
At first, UE sends 802.1X EAPOL-Start message to virtual AP, destination address in the mac frame (DA) is the BSSID of target AP, receiver address (RA) is the MAC Address of virtual AP, the heterogeneous network interconnection entity is according to the BSSID of DA, and the corresponding relation between the address of BSSID that obtains in advance and authenticator (as shown in table 2), inquire the IP address of corresponding authenticator;
Then, the authenticator of virtual AP and described IP address is set up the tunnel, carries out the mutual of verify data.Result after pre-authentication is finished has set up PMK SA between subscriber equipment and the target AP.
Step 305, the tunnel between UE and the WiFi heterogeneous network interconnection entity is removed.
Step 306, UE closes the WiMAX radio-frequency module, opens the WiFi radio-frequency module.
Step 307, UE and target AP are finished series of fortified passes connection process.Particularly, the PMKID that comprises in the step 304 PMK that sets up among the RSNIE among the ReassociationRequest of subscriber equipment, target AP searches this PMK in self buffer memory after, both sides carry out 4 times and shake hands, get access to PTK, thereby finish the network process of going in target AP.
Step 308, UE carries out the MIP registration process.
Step 309, UE sends to switch to WiFi heterogeneous network interconnection entity fully and finishes Indication message, triggers the related resource that discharges the WiMAX access network.
The method of the heterogeneous network interconnection entity select target access network that the embodiment of the invention provides, WiFi heterogeneous network interconnection entity sends to the mac frame of virtual AP by the tunnel from UE in step 304 header field extracts the BSSID of target AP, and the IP address that corresponding authenticator is obtained in inquiry according to described BSSID, thereby make UE to insert among the described WiFi AN to be accessed by the described authenticator authentication operation that networks.The technical scheme that the embodiment of the invention provides can guarantee to be addressed to correct target AP, guarantees to switch to carry out smoothly.
In an embodiment more provided by the invention, UE is for supporting the multimode terminal of WiMAX and WiFi, UE is linked into WiMAX CSN by WiMAXASN, UE need switch to WiFi AN from WiMAX ASN by WiFi heterogeneous network interconnection entity, be linked into WiMAX CSN by WiFi AN, wherein, AP among the WiFi AN can support the 802.11r agreement, and each AP all has authenticator, as shown in Figure 4, the method of the heterogeneous network interconnection entity select target access network that the employing embodiment of the invention provides switches to WiFi AN with UE from WiMAX ASN, comprising:
Step 401 is identical with step 301 as shown in Figure 3 and 302 with 402, repeats no more herein.
Step 403, UE finishes the initial network entry process of WiFi AN on virtual AP (WiFi heterogeneous network interconnection entity), comprising:
At first, carry out open system authentication between UE and the virtual AP, specifically described referring to step 303 as shown in Figure 3;
Then, UE sets up related with virtual AP, comprise mobile domains sign MDID in this related request and the response, indicate it is association at the network of supporting 802.11r, UE passes to the authenticator of virtual AP with message identifying by the tunnel, has set up MSK (master session key) between UE and the certificate server, and certificate server passes to MSK the authenticator of virtual AP, carry out between the authenticator of UE and virtual AP shaking hands for 4 times, set up PTK (pair temporal key).
Step 404, UE sends the fast transferring request to virtual AP, the BSSID that contains target AP in the request message, WiFi heterogeneous network interconnection entity is inquired about the IP address of the authenticator of described BSSID correspondence, (Distribution system DS) is transmitted to request target migration AP to virtual AP by distribution system; After target AP is received request, return the fast transferring response message, give UE through virtual AP, wherein, comprise STA address in the request message, Target AP address, RSNIE[PMKR0Name], MDIE, FTIE[SNonce, R0KH-ID, comprise STA address in the response message, TargetAP address, Status, RSNIE[PMKR0Name, MDIE, FTIE[ANonce, SNonce, R1KH-ID, R0KH-ID, to interaction message, UE and target AP have been finished preliminary authentication by this, and both sides can calculate identical PTK separately.
Step 405, the tunnel between UE and the WiFi heterogeneous network interconnection entity is removed.
Step 406, UE closes the WiMAX radio-frequency module, opens the WiFi radio-frequency module.
Step 407, UE and target AP are finished series of fortified passes connection process.Adopt passive type to monitor Beacon (beacon), perhaps initiatively send Probe request (probe requests thereby) frame, this frame comprises the BSSID (unique identification of AP) of expectation, by Beacon frame or Probe response (probe response) frame, UE recognizes the running parameter of this BSS (Basic Service Set), and with AP set up the MAC layer synchronously, UE and target AP are set up the series of fortified passes and are joined reassociation requests and the corresponding fast transferring process of following the 802.11r agreement.
Step 408, UE carries out the MIP registration process.
Step 409, UE sends to switch to WiFi heterogeneous network interconnection entity and finishes Indication message, triggers the related resource that discharges the WiMAX access network.
The method of the heterogeneous network interconnection entity select target access network that the embodiment of the invention provides, WiFi heterogeneous network interconnection entity sends to the load of quick handoff request message of virtual AP from UE in step 404, extract the BSSID of switching target AP, and according to described BSSID the IP address of corresponding authenticator is obtained in inquiry, thereby can successfully send to target AP to handoff request message by DS.The technical scheme that the embodiment of the invention provides can guarantee to be addressed to correct target AP, guarantees to switch to carry out smoothly.
In an embodiment more provided by the invention, UE is for supporting the multimode terminal of WiMAX and WiFi, UE is linked into WiMAX CSN by WiMAX ASN, UE need switch to WiFi AN from WiMAX ASN by WiFi heterogeneous network interconnection entity, be linked into WiMAX CSN by WiFi AN, wherein, has only a centralized authenticator among the WiFi AN, be positioned on the access controller (AC), and the AP among the WiFi AN can support the 802.11r agreement, as shown in Figure 5, the method for the heterogeneous network interconnection entity select target access network that the employing embodiment of the invention provides switches to WiFi AN with UE from WiMAX ASN, comprising:
Step 501 is identical with step 301 as shown in Figure 3 and 302 with 502, repeats no more herein.
Step 503, UE finishes the initial network entry process of WiFi network on virtual AP (WiFi heterogeneous network interconnection entity), comprising:
At first, carry out open system authentication between UE and the virtual AP, specifically described referring to step 303 as shown in Figure 3;
Then, UE sets up related with virtual AP, include mobile domains sign MDID in this related request and the response, indicate it is association at the network of supporting 802.11r, WiFi heterogeneous network interconnection entity is according to the corresponding relation between the address information of MDID and MDID that sets up in advance and authenticator, the IP address of the authenticator that inquiry is corresponding;
The 3rd, carry out 802.1x EAP authentication between the authenticator of UE and WiFi AN, comprise: UE passes to virtual AP with message identifying by the tunnel, AP again by and AC between interface give authenticator on the AC, authenticator exchanges message identifying with certificate server again, after authentication is passed through, set up MSK (master session key) between UE and the certificate server, certificate server passes to authenticator with MSK, subscriber equipment (having S0KH and S1KH) and authenticator (having R0KH) carry out PMK-R0 in the 802.11r standard and the production process of PMK-R1S, after PMK-R1s produces, the R0KH of AC authenticator sends to its R1KH to the PMK-R1 of virtual AP and target AP correspondence, carry out between UE and the virtual AP shaking hands for 4 times, set up PTK (pair temporal key).
Step 504, UE sends the fast transferring request to virtual AP, and virtual AP is served as RRB (RemoteRequest Broker) request is transmitted to target migration AP; After target AP is received request, return the fast transferring response message, give UE through virtual AP, wherein, comprise STA address in the request message, TargetAPaddress, RSNIE[PMKR0Name], MDIE, FTIE[SNonce, R0KH-ID, comprise STA address in the response message, TargetAP address, Status, RSNIE[PMKR0Name, MDIE, FTIE[ANonce, SNonce, R1KH-ID, R0KH-ID, to interaction message, UE and target AP have been finished preliminary authentication by this, and both sides can calculate identical PTK separately.
Step 505, the tunnel between UE and the WiFi heterogeneous network interconnection entity is removed.
Step 506, UE closes the WiMAX radio-frequency module, opens the WiFi radio-frequency module.
Step 507, UE and target AP are finished series of fortified passes connection process.Adopt passive type to monitor Beacon (beacon), perhaps initiatively send Probe request (probe requests thereby) frame, this frame comprises the BSSID (unique identification of AP) of expectation.By Beacon frame or Probe response (probe response) frame, UE recognizes the running parameter of this BSS (Basic Service Set), and sets up the synchronous of MAC layer with AP.Subscriber equipment and target AP are set up the series of fortified passes connection.Reassociation requests and the corresponding fast transferring process of following the 802.11r agreement.
Step 508, UE carries out the MIP registration process.
Step 509, UE sends to switch to WiFi heterogeneous network interconnection entity and finishes Indication message, triggers the related resource that discharges the WiMAX access network.
The method of the heterogeneous network interconnection entity select target access network that the embodiment of the invention provides, WiFi heterogeneous network interconnection entity can receive the MDID of the target AP of UE transmission, and the IP address that obtains corresponding authenticator according to described MDID, thereby make UE to insert among the described WiFi AN to be accessed by the described authenticator authentication operation that networks.The technical scheme that the embodiment of the invention provides can guarantee to be addressed to correct target AP, guarantees to switch to carry out smoothly.
As shown in Figure 6, the embodiment of the invention also provides a kind of heterogeneous network interconnection entity, comprising:
Receiving element 601 is used to receive the identification information of the target access network that subscriber equipment sends;
In the present embodiment, when target access network was WiMAX ASN, the identification information of target access network was the sign of BSID or authenticator; When target access network was WiFi AN, the identification information of target access network was BSSID or mobile domains sign MDID.
Acquiring unit 602 is used for the identification information according to the target access network of described receiving element 601 receptions, obtains the address information of the authenticator of described target access network;
Further, as shown in Figure 7, described acquiring unit 602 can comprise:
Obtain subelement 6021, be used for identification information according to the target access network of described receiving element 601 receptions, and the corresponding relation of the address information of the identification information of the access network that obtains in advance and authenticator, obtain the address information of the authenticator of target access network; Or,
Further, as shown in Figure 8, described operating unit 603 can comprise:
Set up subelement 6031, be used for the address information of the authenticator that obtains according to described acquiring unit 602, set up the corresponding relation between described subscriber equipment and the described authenticator;
The method of the heterogeneous network interconnection entity select target access network that the specific implementation method of the heterogeneous network interconnection entity that the embodiment of the invention provides can provide referring to the embodiment of the invention is described, repeats no more herein.
The heterogeneous network interconnection entity that the embodiment of the invention provides, receive the identification information of the target access network of UE transmission, and obtain the address information of the authenticator of target access network according to the identification information of described target access network, thereby make the UE authentication operation that can network by the authenticator of described target access network, insert target access network, heterogeneous network interconnection entity and an access network grappling in the prior art have been solved, when UE target access network to be accessed is not access network with the grappling of heterogeneous network interconnection entity, it is longer that UE carries out the delay that network switches, it is poor that telex network is experienced, the perhaps problem that UE can't access network, the technical scheme that the embodiment of the invention provides can reduce the network switching delay, improve user's communications and experience, guarantee to switch and to carry out smoothly.
The embodiment of the invention also provides a kind of communication system, comprising: the heterogeneous network interconnection entity, and described heterogeneous network interconnection entity links to each other with subscriber equipment in the mode that can communicate by letter;
Described heterogeneous network interconnection entity, be used to receive the identification information of the target access network that described subscriber equipment sends, identification information according to described target access network, obtain the address information of the authenticator of described target access network, according to the address information of described authenticator, with described subscriber equipment by the described authenticator authentication operation that networks.
The method of the heterogeneous network interconnection entity select target access network that the specific implementation method of the communication system that the embodiment of the invention provides can provide referring to the embodiment of the invention is described, repeats no more herein.
The communication system that the embodiment of the invention provides, the heterogeneous network interconnection entity can receive the identification information of the target access network of subscriber equipment transmission, and obtain the address information of the authenticator of target access network according to the identification information of described target access network, thereby make the subscriber equipment authentication operation that can network by the authenticator of target access network, insert target access network, heterogeneous network interconnection entity and an access network grappling in the prior art have been solved, when subscriber equipment target access network to be accessed is not access network with the grappling of heterogeneous network interconnection entity, it is longer that subscriber equipment carries out the delay that network switches, it is poor that telex network is experienced, the perhaps problem that subscriber equipment can't access network, the technical scheme that the embodiment of the invention provides can reduce the network switching delay, improve user's communications and experience, guarantee to switch and to carry out smoothly.
One of ordinary skill in the art will appreciate that all or part of step that realizes in the foregoing description method is to instruct relevant hardware to finish by program, described program can be stored in the computer-readable recording medium, as ROM/RAM, magnetic disc or CD etc.
The above; only be the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion by described protection range with claim.
Claims (10)
1. the method for a heterogeneous network interconnection entity select target access network is characterized in that, comprising:
Receive the identification information of the target access network of subscriber equipment transmission;
According to the identification information of described target access network, obtain the address information of the authenticator of described target access network;
According to the address information of described authenticator, with described subscriber equipment by the described authenticator authentication operation that networks.
2. method according to claim 1 is characterized in that, described identification information according to described target access network, and the address information of obtaining the authenticator of described target access network comprises:
According to the identification information of described target access network, and the corresponding relation of the address information of the identification information of the access network of setting up in advance and authenticator, obtain the address information of the authenticator of target access network; Or,
The URL that produces according to the identification information of described target access network obtains the address information of the authenticator of target access network with the DNS Protocol inquiry.
3. method according to claim 1 and 2 is characterized in that,
When described target access network was micro-wave access global inter communication access service network WiMAX ASN, the identification information of described target access network was the sign BSID of base station or the identification information of authenticator;
When described target access network was Wireless Fidelity access network WiFi AN, the identification information of described target access network was the basic service set identification BSSID or the mobile domains sign MDID of access point.
4. method according to claim 1 is characterized in that, obtains the header field of the message that the identification information of described target access network sends from described subscriber equipment or the load.
5. method according to claim 1 is characterized in that, described address information according to described authenticator comprises described subscriber equipment by the described authenticator authentication operation that networks:
According to the address information of described authenticator, set up the corresponding relation between described subscriber equipment and the described authenticator;
According to the corresponding relation between described subscriber equipment and the described authenticator, with described subscriber equipment by the described authenticator authentication operation that networks.
6. a heterogeneous network interconnection entity is characterized in that, comprising:
Receiving element is used to receive the identification information of the target access network that subscriber equipment sends;
Acquiring unit is used for the identification information according to the target access network of described receiving element reception, obtains the address information of the authenticator of described target access network;
Operating unit is used for the address information of the authenticator that obtains according to described acquiring unit, with described subscriber equipment by the described authenticator authentication operation that networks.
7. heterogeneous network interconnection entity according to claim 6 is characterized in that, described acquiring unit comprises:
Obtain subelement, be used for the identification information of the target access network that receives according to described receiving element, and the corresponding relation of the address information of the identification information of the access network that obtains in advance and authenticator, obtain the address information of the authenticator of target access network; Or,
The inquiry subelement is used for the URL that the identification information of the target access network that receives according to described receiving element produces, and obtains the authenticator address information of target access network with the DNS Protocol inquiry.
8. according to claim 6 or 7 described heterogeneous network interconnection entities, it is characterized in that,
When described target access network was micro-wave access global inter communication access service network WiMAX ASN, the identification information of described target access network was the sign BSID of base station or the identification information of authenticator;
When described target access network was Wireless Fidelity access network WiFi AN, the identification information of described target access network was the basic service set identification BSSID or the mobile domains sign MDID of access point.
9. heterogeneous network interconnection entity according to claim 6 is characterized in that, described operating unit comprises:
Set up subelement, be used for the address information of the authenticator that obtains according to described acquiring unit, set up the corresponding relation between described subscriber equipment and the described authenticator;
The operation subelement is used for according to described subscriber equipment that subelement sets up and the corresponding relation between the described authenticator set up, with described subscriber equipment by the described authenticator authentication operation that networks.
10. a communication system is characterized in that, comprising: the heterogeneous network interconnection entity, and described heterogeneous network interconnection entity links to each other with subscriber equipment in the mode that can communicate by letter;
Described heterogeneous network interconnection entity, be used to receive the identification information of the target access network that described subscriber equipment sends, identification information according to described target access network, obtain the address information of the authenticator of described target access network, according to the address information of described authenticator, with described subscriber equipment by the described authenticator authentication operation that networks.
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| CN2009101586230A CN101945391A (en) | 2009-07-03 | 2009-07-03 | Method, device and system for selecting target access network for heterogeneous network intercommunicating entity |
| PCT/CN2010/074970 WO2011000333A1 (en) | 2009-07-03 | 2010-07-05 | Method, device and system for heterogeneous network intercommunication entity to choose object access network |
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| CN2009101586230A CN101945391A (en) | 2009-07-03 | 2009-07-03 | Method, device and system for selecting target access network for heterogeneous network intercommunicating entity |
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| WO2011000333A1 (en) | 2011-01-06 |
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