CN103702375A - Method and system for switching WTRU (wireless transmit receive unit) in WLAN (wireless logic area network) by using cellular network - Google Patents
Method and system for switching WTRU (wireless transmit receive unit) in WLAN (wireless logic area network) by using cellular network Download PDFInfo
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Abstract
The invention discloses a method and a system for switching a WTRU (wireless transmit receive unit) in a WLAN (wireless logic area network) by using a cellular network. The method comprises the steps that the WTRU sends information needed for switching to an AC (access point controller) by the cellular network; after the AC verifies the WTRU, a verifying result is mass-sent to access points (AP) and is sent to the WTRU by the cellular network; the WTRU sends a relating request to one AP; the AP allows the access of the WTRU according to the stored verifying result and the verifying result sent by the WTRU; when the WTRU is determined to switch to the other AP, the WTRU sends a relating request to the other AP; the other AP allows the access of the WTRU according to the stored verifying result and the verifying result sent from the WTRU, so the switching in the WLAN is finished. Recertification is not needed in the process that the current connection of the WTRU is disconnected and the new connection is established, the needed time is shorter than the time needed by the existing switch technology based on the access point roaming protocol, the continuity of a service is enabled to be good, and the reliability is high.
Description
Technical field
The present invention relates to moving communicating field, particularly, relate to the method and system that a kind of WTRU utilizes Cellular Networks to switch in WLAN (wireless local area network).
Background technology
In view of the convenience of radio communication, WLAN (wireless local area network) (Wi-Fi) has also obtained application more and more, and particularly Mobile Communication Service commercial city is at large scale deployment hotspot.But because WLAN (wireless local area network) is not to design for mobile application, and its coverage is less, at website (STA, be the digital link terminal equipment in WLAN (wireless local area network)) in the fast scene of the speed of service, the residence time of mobile device node under each access point (AP) covers is conventionally very short, so one of the technology of switching between AP system supporting technology that to be Wi-Fi network very important.Website should be allowed to free-roaming in same Wi-Fi network coverage, and all AP that form Wi-Fi network must work in concert, and guaranteeing provides seamless access service to the user who holds this website.When user departs from the scope of a certain AP gradually, mobile terminal should be affiliated in a short period of time on another AP and be gone, and this process is called switching.
What in prior art, exist a kind ofly realizes scheme that website switches as shown in Figure 1.Wireless local area network (WLAN) system is followed IEEE802.11 agreement mostly at present, and the website that adopts its definition handoff technique initiatively, in an extended service set (ESS), STA is according to eating dishes without rice or wine signal quality, selecting the AP that wherein signal is the strongest is switching target access, and in access point internetwork roaming agreement, STA handoff procedure between different AP in same ESS is:
STA searches out new target AP, and cut-out is connected with current AP's, and sends the request that reconnects to target AP;
Target AP is set up new being connected with STA, sends switching notice to current AP, and upgrades two layers of route;
Current AP receives switching notice, and the escape way by distributed system (DS) shifts STA relevant information to target AP, and removes local STA relevant information;
Target AP receives STA relevant information storage, and STA switches to target AP.
In this implementation, website switches by connecting or the process that reconnects completes, and handoff delay is longer, and the business strict to delay requirement there will be obvious interruption when switching.When employing reconnects process and switches, owing to not carrying out the process of necessary safety certification to switching target AP, so the handoff procedure of STA lacks safety.Random STA also initiatively switches can bring unnecessary difficulty to optimizing processs such as load balancing.In above-mentioned switching, AP lacks the mechanism that handoff procedure is control effectively and managed, so switching efficiency, service quality (QOS) requirement, fail safe and Optimized Measures etc. are all difficult to guarantee.
In prior art, another kind of website switches implementation as shown in Figure 2, it obtains STA control by AP or access point controller (AC), can be by user's much information in user profile migration process, comprise that user label information, security information, application business information hand to target AP by the escape way of cable network, guarantee efficiency and the fail safe of switching, and can support the switching requirement of different QoS business.In Fig. 2, between AC, by IACTP tunnel, connect.The quick handoff technique of this STA handoff procedure between different AP under same ESS is as follows:
STA reports wireless air interface environmental information (or handover request);
AP/AC is according to wireless air interface environmental information and DS information, and whether judgement switching occurs;
Transplant STA information and upgrade two layers of route;
STA switches to target AP.
Although this implementation improves switch speed, also introduced some uncertain factors, increased on the contrary part time delay.This switching by synchronous, STA information, transplanted and two layers of routing update three in maximum delay determine, so switching efficiency can not get guaranteeing to the full extent.In addition, for switching trans-regional, cross operator aspect, this technology can not effectively be supported.
Summary of the invention
The object of this invention is to provide the method and system that a kind of WTRU utilizes Cellular Networks to switch in WLAN (wireless local area network), so as WTRU can be in WLAN (wireless local area network) seamless switching.
To achieve these goals, the invention provides a kind of method that WTRU utilizes Cellular Networks to switch in WLAN (wireless local area network), the method comprises: described WTRU will switch required information and be sent to the access point controller AC of management described WTRU region by described Cellular Networks in WLAN (wireless local area network), describedly in WLAN (wireless local area network), switches required information and comprises that described AC verifies the information that described WTRU is required; Described AC verifies after described WTRU, the access point AP by the result mass-sending to the WTRU region of described AC management, and by described Cellular Networks, the result is sent to described WTRU; Described WTRU sends associated request to the AP of service described WTRU region, in described associated request, comprises described the result; The AP of the described WTRU of described service region allows described WTRU access according to the result of stored described the result and described WTRU transmission; At described WTRU, determine that while switching to the AP that another serves described WTRU region, described WTRU sends described associated request to the described AP that another serves described WTRU region, in described associated request, comprises described the result; The described AP that another serves described WTRU region allows described WTRU access according to the result of stored described the result and described WTRU transmission, thereby completes the switching in WLAN (wireless local area network).
Preferably, described WTRU by described Cellular Networks by WLAN (wireless local area network), switch required information be sent to management described WTRU region access point controller AC comprise: described WTRU switches required information by described Cellular Networks and sends to mobility management apparatus MME in WLAN (wireless local area network); Described MME switches required information and sends to gateway S-GW described in WLAN (wireless local area network); Described S-GW switches required information and sends to packet data gateway P-GW described in WLAN (wireless local area network); Described P-GW by described in WLAN (wireless local area network), switch required information send to management described WTRU region access point controller AC.
Preferably, describedly by described Cellular Networks, the result is sent to described WTRU and comprises: described AC is sent to described P-GW by described the result; Described P-GW is sent to described S-GW by described the result; Described S-GW is sent to described MME by described the result; Described MME is sent to described WTRU by described the result by Cellular Networks.
Preferably, the AP of the described WTRU of described service region allows described WTRU access to comprise according to the result of stored described the result and described WTRU transmission: in the situation that the result that described stored described the result and described WTRU send is consistent, the AP of the described WTRU of described service region allows described WTRU access; The described AP that another serves described WTRU region allows described WTRU access to comprise according to the result of stored described the result and described WTRU transmission: in the situation that the result that described stored described the result and described WTRU send is consistent, the described AP that another serves described WTRU region allows described WTRU access.
Preferably, the method also comprises: described AC is together sent to described WTRU by described Cellular Networks by information and the described the result of the AP of service described WTRU region.
Preferably, the method also comprises: described AC verifies after described WTRU, and the result is mass-sended to the AC except described AC, and the AC except described AC is the access point AP to its management by the result mass-sending.
Preferably, describedly in WLAN (wireless local area network), switch required information and comprise: MAC Address, authentication state, encryption mode and key are controlled in the geographical position sign of WTRU region, media interviews.
Preferably, described the result is identifying code.
The system that the present invention also provides a kind of WTRU to utilize Cellular Networks to switch in WLAN (wireless local area network), this system comprises WTRU, access point controller AC and access point AP; Described WTRU for will switching required information in WLAN (wireless local area network) and be sent to the AC of management described WTRU region by described Cellular Networks, describedly switches required information and comprises that described AC verifies the information that described WTRU is required in WLAN (wireless local area network); Described AC, for verifying described WTRU, the AP by the result mass-sending to the WTRU region of described AC management, and by described Cellular Networks, the result is sent to described WTRU; Described WTRU, also sends associated request for the AP to service described WTRU region, in described associated request, comprises described the result; The AP of the described WTRU of described service region, for allowing described WTRU access according to the result of stored described the result and described WTRU transmission; Described WTRU, also, for determining at described WTRU while switching to the AP that another serves described WTRU region, sends described associated request to the described AP that another serves described WTRU region, in described associated request, comprises described the result; Described another served the AP of described WTRU region, for allowing described WTRU access according to the result of stored described the result and described WTRU transmission, thereby completes the switching in WLAN (wireless local area network).
Preferably, this system also comprises: mobility management apparatus MME, gateway S-GW and packet data gateway P-GW; Described WTRU, sends to described MME for switching required information by described Cellular Networks in WLAN (wireless local area network); Described MME, for switching required information in WLAN (wireless local area network) and send to described S-GW described, and is sent to described WTRU by described the result by Cellular Networks; Described S-GW, for switching required information in WLAN (wireless local area network) and send to described P-GW described, and is sent to described MME by described the result; Described P-GW, for switching in WLAN (wireless local area network) the access point controller AC that required information sends to management described WTRU region by described, and is sent to described S-GW by described the result; Described AC, also for being sent to described P-GW by described the result.
Preferably, described AC, also for after the described WTRU of checking, by the result mass-sending, to the AC except described AC, the AC except described AC is the access point AP to its management by the result mass-sending.
The present invention utilizes the passage of Cellular Networks to realize WTRU fast registration Wi-Fi network, between a plurality of AP, carries out switching fast the function connecting.In the present invention, making WTRU disconnect to be currently connected to set up new connection procedure does not need again to authenticate, and the needed time is fewer than the existing time used of the handoff technique based on access point roaming agreement, can guarantee that business continuance is good, and reliability is high.
Other features and advantages of the present invention partly in detail are described the embodiment subsequently.
Accompanying drawing explanation
Accompanying drawing is to be used to provide a further understanding of the present invention, and forms a part for specification, is used from explanation the present invention, but is not construed as limiting the invention with embodiment one below.In the accompanying drawings:
Fig. 1 is a kind of system schematic that website switches that realizes of the prior art;
Fig. 2 is that another kind of the prior art is realized the system schematic that website switches;
Fig. 3 is that another kind provided by the invention is realized the system schematic that website switches;
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated.Should be understood that, embodiment described herein only, for description and interpretation the present invention, is not limited to the present invention.
In order to realize the quick switching of website, and guarantee fail safe, continuity and the reliability of business, the invention provides a kind of Cellular Networks of utilizing and realize the scheme that website switches.The covering of Cellular Networks is significantly better than Wi-Fi network at present, when therefore mobile terminal switches between Wi-Fi network, can utilize the passage of Cellular Networks to realize the needed exchanges data of switching, within the shortest time, complete zones of different, switching between the AP of different operators, improves terminal use's Experience Degree greatly.
Implementation provided by the invention as shown in Figure 3, can realize by air interface method, be that STA passes through Cellular Networks wireless air interface by the relevant information of STA, as geographical position sign, media interviews are controlled the notices such as (MAC) address, authentication state, encryption mode, key to AC.It is upper that AC is registered in the relevant information of STA AC again by checking, and notice is to this STA.Switch decision can be realized neatly on STA fast, and court verdict is implemented on AP/AC.In order to utilize Cellular Networks, the website in the present embodiment need to be supported Wi-Fi network and Cellular Networks.The present invention, can support the website of Wi-Fi network and Cellular Networks can be called wireless transmitter/receiver unit (WTRU).
In Fig. 3, in each eNB, dispose the information of AC, comprise its address and management area information configuration, and eNB can periodically upgrade the information of this AC; Can determine which AC is that current WTRU serves by the information of AC, thereby can correctly to WTRU, send its needed AC information (for example address of AC).Like this, each website can obtain this AC information in eNB side.
Below in conjunction with accompanying drawing, describe the process that WTRU switches in detail.As shown in Figure 3, when WTRU is entering behind a region, first it access Cellular Networks, after the associated registration of Cellular Networks side, from eNB, obtain this region AC information (that AC server ip address that for example can comprise a plurality of AP that lay in this region of management), then in moving process, by AC, provide AP information to connect different AP, realize fast and switching.The obtaining of IP address that it should be noted that AC can obtain by Cellular Networks, also can obtain by WLAN (wireless local area network), for example, after direct accessing WLAN, obtain the IP address of AC by WLAN (wireless local area network).ENB possesses a plurality of AC, for example AC of operator oneself and the third-party AC that stores, and third party AC information can be collected by other approach, includes but not limited to collect by the STA in network.
Concrete handoff procedure is as follows:
(1) WTRU learns the IP address of AC by Cellular Networks mode;
(2) WTRU connects the process of AC server by Cellular Networks: mobility management apparatus (MME) server that is first connected to core net by eNB, through MME, be connected to the S-GW server of core net, by gateway (S-GW), be connected to packet data gateway (P-GW) upper, the external s2a interface by P-GW is connected in AC.
(3) by the passage in (2) step, WTRU directly carries out authentication registration to AC, when this WTRU obtains after the authentication of AC server, geography information under this WTRU (as the ID of base station) can be sent to AC, AC, according to this information, for example, sends to this WTRU by near the AP information this geographical position (sign of AP or IP address) and a registration identifying code.AC server is mass-sended the AP to this region by the log-on message of this WTRU simultaneously.
(4) AC sends to the data message of WTRU to send to WTRU by cellular backhaul net one side, and concrete process is: AC is connected to P-GW by s2a interface, then turns back to S-WG from P-GW, then is sent to eNB from S-GW, by eNB, sends to WTRU.
(5) WTRU is receiving the AP information in this region that AC sends back, selects suitable AP to connect.WTRU sends associated request to selected AP, has comprised the registration verification code information in AC side in the information of association request.
(6) AP is after receiving the related information of this WTRU, the registration verification code information providing by AC, and this WTRU only need to carry out simple association, and does not need to authenticate.After carrying out association, this AP returns to AC by the information of this WTRU and backs up.The association that AP carries out can comprise the identifying code of its storage of comparison and the identifying code of the WTRU transmission receiving, and the two identical identification is successfully associated, and WTRU can access.
(7) WTRU just can move in this region like this, and is connected fast and switches with the AP that belongs to an AC server.
Alternatively, AC also can only be sent to WTRU by identifying code, and the AP(by its region of WTRU local search service for example wireless signal covers the AP in this region), by sending associated request, access for example stronger AP of signal of suitable AP().It should be noted that, the authentication in Fig. 3, authenticating and charging server (AAA) can be used for when WTRU is registered to Cellular Networks, WTRU being verified.
For realizing the seamless switching of WTRU between different AC servers, the AC(that can identifying code be mass-sended by AC to other after checking is adjacent AC for example), AC mass-sends identifying code the AP of its management again, so just can realize between the AP of different AC management and carry out seamless switching.
The initiation of switching can initiatively be determined by WTRU, for example, by detecting the signal strength signal intensity of the AP accessing, drop to below threshold value, can determine and need to access other available AP.
Below describe by reference to the accompanying drawings the preferred embodiment of the present invention in detail; but; the present invention is not limited to the detail in above-mentioned execution mode; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition each the concrete technical characterictic described in above-mentioned embodiment, in reconcilable situation, can combine by any suitable mode.For fear of unnecessary repetition, the present invention is to the explanation no longer separately of various possible compound modes.
In addition, between various execution mode of the present invention, also can carry out combination in any, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (10)
1. WTRU utilizes the method that Cellular Networks is switched in WLAN (wireless local area network), it is characterized in that, the method comprises:
Described WTRU will switch required information and be sent to the access point controller AC of management described WTRU region by described Cellular Networks in WLAN (wireless local area network), describedly in WLAN (wireless local area network), switches required information and comprises that described AC verifies the information that described WTRU is required;
Described AC verifies after described WTRU, the access point AP by the result mass-sending to the WTRU region of described AC management, and by described Cellular Networks, the result is sent to described WTRU;
Described WTRU sends associated request to the AP of service described WTRU region, in described associated request, comprises described the result;
The AP of the described WTRU of described service region allows described WTRU access according to the result of stored described the result and described WTRU transmission;
At described WTRU, determine that while switching to the AP that another serves described WTRU region, described WTRU sends described associated request to the described AP that another serves described WTRU region, in described associated request, comprises described the result;
The described AP that another serves described WTRU region allows described WTRU access according to the result of stored described the result and described WTRU transmission, thereby completes the switching in WLAN (wireless local area network).
2. method according to claim 1, is characterized in that, described WTRU by described Cellular Networks by WLAN (wireless local area network), switch required information be sent to management described WTRU region access point controller AC comprise:
Described WTRU switches required information by described Cellular Networks and sends to mobility management apparatus MME in WLAN (wireless local area network);
Described MME switches required information and sends to gateway S-GW described in WLAN (wireless local area network);
Described S-GW switches required information and sends to packet data gateway P-GW described in WLAN (wireless local area network);
Described P-GW by described in WLAN (wireless local area network), switch required information send to management described WTRU region access point controller AC.
3. method according to claim 2, is characterized in that, describedly by described Cellular Networks, the result is sent to described WTRU and comprises:
Described AC is sent to described P-GW by described the result;
Described P-GW is sent to described S-GW by described the result;
Described S-GW is sent to described MME by described the result;
Described MME is sent to described WTRU by described the result by Cellular Networks.
4. method according to claim 1, is characterized in that,
The AP of the described WTRU of described service region allows described WTRU access to comprise according to the result of stored described the result and described WTRU transmission:
In the situation that the result that described stored described the result and described WTRU send is consistent, the AP of the described WTRU of described service region allows described WTRU access;
The described AP that another serves described WTRU region allows described WTRU access to comprise according to the result of stored described the result and described WTRU transmission:
In the situation that the result that described stored described the result and described WTRU send is consistent, the described AP that another serves described WTRU region allows described WTRU access.
5. according to the method described in claim 1-4 any one, it is characterized in that, the method also comprises:
Described AC is together sent to described WTRU by described Cellular Networks by information and the described the result of the AP of service described WTRU region.
6. according to the method described in claim 1-4 any one, it is characterized in that, the method also comprises:
Described AC verifies after described WTRU, and the result is mass-sended to the AC except described AC, and the AC except described AC is the access point AP to its management by the result mass-sending.
7. according to the method described in claim 1-4 any one, it is characterized in that, describedly in WLAN (wireless local area network), switch required information and comprise: MAC Address, authentication state, encryption mode and key are controlled in the geographical position sign of WTRU region, media interviews.
8. according to the method described in claim 1-4 any one, it is characterized in that, described the result is identifying code.
9. WTRU utilizes the system that Cellular Networks is switched in WLAN (wireless local area network), it is characterized in that, this system comprises WTRU, access point controller AC and access point AP;
Described WTRU for will switching required information in WLAN (wireless local area network) and be sent to the AC of management described WTRU region by described Cellular Networks, describedly switches required information and comprises that described AC verifies the information that described WTRU is required in WLAN (wireless local area network);
Described AC, for verifying described WTRU, the AP by the result mass-sending to the WTRU region of described AC management, and by described Cellular Networks, the result is sent to described WTRU;
Described WTRU, also sends associated request for the AP to service described WTRU region, in described associated request, comprises described the result;
The AP of the described WTRU of described service region, for allowing described WTRU access according to the result of stored described the result and described WTRU transmission;
Described WTRU, also, for determining at described WTRU while switching to the AP that another serves described WTRU region, sends described associated request to the described AP that another serves described WTRU region, in described associated request, comprises described the result;
Described another served the AP of described WTRU region, for allowing described WTRU access according to the result of stored described the result and described WTRU transmission, thereby completes the switching in WLAN (wireless local area network).
10. system according to claim 9, is characterized in that, this system also comprises: mobility management apparatus MME, gateway S-GW and packet data gateway P-GW;
Described WTRU, sends to described MME for switching required information by described Cellular Networks in WLAN (wireless local area network);
Described MME, for switching required information in WLAN (wireless local area network) and send to described S-GW described, and is sent to described WTRU by described the result by Cellular Networks;
Described S-GW, for switching required information in WLAN (wireless local area network) and send to described P-GW described, and is sent to described MME by described the result;
Described P-GW, for switching in WLAN (wireless local area network) the access point controller AC that required information sends to management described WTRU region by described, and is sent to described S-GW by described the result;
Described AC, also for being sent to described P-GW by described the result.
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| CN111726842B (en) * | 2020-05-14 | 2023-03-03 | 深圳互由科技有限公司 | Roaming switching method, electronic device and computer readable storage medium |
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