CN106358248A - Wireless local area network (WLAN) switching method and device - Google Patents
Wireless local area network (WLAN) switching method and device Download PDFInfo
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- CN106358248A CN106358248A CN201510412477.5A CN201510412477A CN106358248A CN 106358248 A CN106358248 A CN 106358248A CN 201510412477 A CN201510412477 A CN 201510412477A CN 106358248 A CN106358248 A CN 106358248A
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- access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0066—Transmission or use of information for re-establishing the radio link of control information between different types of networks in order to establish a new radio link in the target network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/16—Performing reselection for specific purposes
- H04W36/18—Performing reselection for specific purposes for allowing seamless reselection, e.g. soft reselection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/10—Small scale networks; Flat hierarchical networks
- H04W84/12—WLAN [Wireless Local Area Networks]
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Abstract
The invention provides a wireless local area network (WLAN) switching method and a wireless local area network switching device. The wireless local area network method includes: a base station acquiring identity information and first identity information of the terminal; the base station transmitting an association request to a target WLAN access point corresponding to the first identity information according to the identity information of the terminal; the base station receiving an association response transmitted from the target WLAN access point; the base station transmitting switching execution information to the terminal according to the association response; wherein the switching execution information is used for indicate the terminal to be switched into a channel corresponding to the target WLAN access point from a channel corresponding to the current WLAN access point and indicating the terminal to modify association state information, and the terminal performs data transmission with the target WLAN access point. By the arrangement, service quality of the WLAN is effectively guaranteed.
Description
Technical field
The present embodiments relate to communication technology, more particularly, to a kind of changing method of WLAN and dress
Put.
Background technology
WLAN (wireless local access network, abbreviation wlan) is because having high biography
The features such as defeated speed, small configuration cost and be widely used.In recent years, in order to improve wlan to user
Mobility support, to lift the different of local throughput performance by way of dense deployment wlan access point
Structure network scenarios is by extensive concern.
In the scene of dense deployment wlan access point, terminal can frequently connect in different wlan
Switch between access point, in traditional wlan handoff procedure, terminal first interrupt with current access point it
Between data transfer, then to target wlan access point initiate association request, after being successfully associated, start with
Target access carries out data transmission.
In existing wlan handoff procedure, in association phase, terminal must be interrupted and current access point between
Data transfer, transmission data could be proceeded with target wlan access point after being successfully associated,
This data interruption is intolerable for the high business of the real-times such as voice, video, thus dropping
The low service quality of wlan business.
Content of the invention
The embodiment of the present invention provides a kind of switching method and apparatus of WLAN, it is to avoid wlan cuts
Data interruption phenomenon occurs during changing, does not interfere with the high business of the real-times such as voice, video, effectively
Ensure that the service quality of wlan.
Embodiment of the present invention first aspect provides a kind of changing method of WLAN wlan, comprising:
Base station obtains identity information and first identification information of terminal；Wherein, described base station is except wlan
Outside other networks in base station；
Described base station according to the identity information of described terminal, to target corresponding to described first identification information
Wlan access point sends association request；Wherein, described association request is used for asking described target wlan
Access point is associated state verification to described terminal；
Described base station receives the associated response that described target wlan access point sends；Wherein, described association
Response includes the result that described terminal is verified by described association status；
Described base station sends switching execution information according to described associated response to described terminal；Wherein, described
Switching execution information is used for indicating that described terminal switches to institute from the corresponding channel of current wlan access point
State the corresponding channel of target wlan access point, and indicate described terminal modifications association status information, and institute
State terminal to carry out data transmission with described target wlan access point.
In conjunction with a first aspect, in the first possible implementation of first aspect, described base station obtains eventually
The identity information at end and the first identification information, specifically include:
Described base station receives the performance information of described terminal and the institute that described current wlan access point sends
State terminal identity information；
Preset when described base station is less than according to the service quality that the performance information of described terminal determines described terminal
The list information of candidate's wlan access point during threshold value, is sent to described terminal；
Described base station receives the signal strength measurement of described candidate's wlan access point that described terminal sends
Report；
Described base station determines described according to the performance information of described signal strength measurement report and described terminal
One identification information.
In conjunction with a first aspect, first aspect second may in implementation, described base station terminal
Identity information and the first identification information, specifically include:
Described base station receives the identity information of described terminal and the described first mark letter that described terminal sends
Breath.
In conjunction with any one possible implementation of above-mentioned first aspect, the third in first aspect may be real
In existing mode, after described base station sends switching execution information to described terminal, methods described also includes:
Described base station sends disassociation information to described current wlan access point；Wherein, described releasing
The reason related information includes address and the disassociation of described terminal code.
In conjunction with the third possible implementation of first aspect, the 4th kind in first aspect can the side of enabling
In formula, described base station according to the identity information of described terminal, to target corresponding to described first identification information
After wlan access point sends association request, methods described also includes:
Described base station receives the association failure response that described target wlan access point sends；
Described base station obtains the second identification information, and determines that wlan corresponding to described second identification information connects
Access point is as target wlan access point.
Embodiment of the present invention second aspect provides a kind of changing method of WLAN wlan, comprising:
Terminal receives the switching execution information that base station sends；Wherein, described switching execution information is described base
The identity information stood according to described terminal sends, to target wlan access point, the letter obtaining after association request
Breath；Wherein, described association request of stating is used for asking described target wlan access point that described terminal is carried out
Association status are verified；
Described terminal switches from the corresponding channel of current wlan access point according to described switching execution information
To the corresponding channel of described target wlan access point, and change association status information；Wherein, described pass
Connection status information includes the identification information of described target wlan access point and connects identification code aid；
Described terminal is carried out data transmission with described target wlan access point.
The embodiment of the present invention third aspect provides a kind of switching device of WLAN wlan, comprising:
Acquisition module, for obtaining identity information and first identification information of terminal；
Sending module is for the identity information according to described terminal, corresponding to described first identification information
Target wlan access point sends association request；Wherein, described association request of stating is used for asking described target
Wlan access point is associated state verification to described terminal；
Receiver module, for receiving the associated response that described target wlan access point sends；Wherein, institute
State associated response and include the result that described terminal is verified by described association status；
Described sending module is additionally operable to send switching execution information according to described associated response to described terminal；
Wherein, described switching execution information is used for indicating described terminal from the corresponding channel of current wlan access point
Switch to the corresponding channel of described target wlan access point, and indicate described terminal modifications association status letter
Cease, and described terminal is carried out data transmission with described target wlan access point.
In conjunction with the third aspect, in the first possible implementation of the third aspect, described acquisition module tool
Body is used for receiving the property of the described terminal that described current wlan access point sends by described receiver module
Can information and described terminal identity information；When described acquisition module determines according to the performance information of described terminal
When the service quality of described terminal is less than predetermined threshold value, triggers described sending module and send to described terminal
The list information of candidate's wlan access point；
Described acquisition module is additionally operable to receive, by described receiver module, the described candidate that described terminal sends
The signal strength measurement report of wlan access point；And according to described signal strength measurement report and described end
The performance information at end determines described first identification information.
In conjunction with the third aspect, in the possible implementation of second of the third aspect, described acquisition module tool
Body is used for receiving the identity information and described the of the described terminal that described terminal sends by described receiver module
One identification information.
In conjunction with any one possible implementation of the above-mentioned third aspect, the third in the third aspect may be real
In existing mode, described sending module is additionally operable to send disassociation letter to described current wlan access point
Breath；Wherein, the reason described disassociation information includes address and the disassociation of described terminal code.
In conjunction with the third possible implementation of the third aspect, the 4th kind in the third aspect can the side of enabling
In formula, the association that described receiver module is additionally operable to receive described target wlan access point transmission unsuccessfully rings
Should；
Described acquisition module is additionally operable to obtain the second identification information, and determines that described second identification information corresponds to
Wlan access point as target wlan access point.
Embodiment of the present invention fourth aspect provides a kind of switching device of WLAN wlan, comprising:
Receiver module, for receiving the switching execution information of base station transmission；Wherein, described switching executes letter
Cease, for described base station, association request is sent to target wlan access point according to the identity information of described terminal
The information obtaining afterwards；Wherein, described association request of stating is used for asking described target wlan access point to institute
State terminal and be associated state verification；
Processing module, for according to described switching execution information from the corresponding channel of current wlan access point
Switch to the corresponding channel of described target wlan access point, and change association status information；Wherein, institute
State association status information to include the identification information of described target wlan access point and connect identification code aid；
Sending module, for carrying out data transmission with described target wlan access point.
The switching method and apparatus of WLAN provided in an embodiment of the present invention, obtain terminal by base station
Identity information and the first identification information after, according to the identity information of terminal, to the first identification information pair
The target wlan access point answered sends association request, and receives the pass of target wlan access point transmission
Connection response, and switching execution information is sent so that terminal is from current wlan to terminal according to associated response
The corresponding channel of access point switches to the corresponding channel of target wlan access point, and changes association status letter
Breath, is carried out data transmission with target wlan access point, because association process is by addition to wlan
Base station in other networks replaces terminal to complete, in association process, terminal still with current wlan
Access point carries out data transmission, it is to avoid data interruption phenomenon, does not interfere with voice, video etc. in real time
The high business of property, has been effectively ensured the service quality of wlan.
Brief description
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to reality
The accompanying drawing applying required use in example or description of the prior art be briefly described it should be apparent that, under
Accompanying drawing in the description of face is some embodiments of the present invention, for those of ordinary skill in the art,
On the premise of not paying creative labor, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the application scenarios schematic diagram of the changing method of wlan provided in an embodiment of the present invention；
The changing method flow chart of the wlan that Fig. 2 provides for the embodiment of the present invention one；
The changing method flow chart of the wlan that Fig. 3 provides for the embodiment of the present invention two；
The changing method flow chart of the wlan that Fig. 4 provides for the embodiment of the present invention three；
The signaling interaction diagram of the changing method of the wlan that Fig. 5 provides for the embodiment of the present invention four；
The signaling interaction diagram of the changing method of the wlan that Fig. 6 provides for the embodiment of the present invention five；
The structural representation of the switching device of the wlan that Fig. 7 provides for the embodiment of the present invention six；
The structural representation of the switching device of the wlan that Fig. 8 provides for the embodiment of the present invention seven.
Specific embodiment
Purpose, technical scheme and advantage for making the embodiment of the present invention are clearer, below in conjunction with this
Accompanying drawing in bright embodiment, is clearly and completely described to the technical scheme in the embodiment of the present invention,
Obviously, described embodiment is a part of embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained under the premise of not making creative work
The every other embodiment obtaining, broadly falls into the scope of protection of the invention.
Fig. 1 is the application scenarios schematic diagram of the changing method of wlan provided in an embodiment of the present invention.As figure
Shown in 1, this scene includes base station 5, wlan access point 6, wlan access point 7, wlan
Access point 8 and terminal 9, and, this scene include cellular network 1, wlan2, wlan3 and
wlan4.Wherein, base station 5 is cellular basestation, and cellular network 1 provides grand covering, not only may be used in base station 5
To be controlled interacting of signaling with terminal, can also be communicated with wlan access point, dense deployment
Wlan access point be that terminal provides data, terminal 9 is necessary for dual-mode terminal, both can utilize honeycomb
Network is communicated with base station 5 it is also possible to be carried out data transmission using wlan and wlan access point.
It should be noted that illustrate only 3 wlan access points and 3 wlan in the present embodiment, real
More wlan access points and wlan can also be included in the scene of border, in the present invention not as
Limit.
The changing method flow chart of the wlan that Fig. 2 provides for the embodiment of the present invention one.As shown in Fig. 2
The method comprises the following steps:
Step 101, base station obtain the identity information of terminal and the first identification information, wherein, base station be except
The base station in other networks outside wlan.
In the present embodiment, the first identification information can include the service set of wlan access point
(service set identifier, abbreviation ssid) and basic service set identification (basic service set
Identifier, abbreviation bssid).When base station gets identity information and first identification information of this terminal
It can be determined that this terminal needs to connect from current wlan access point, to be switched to the first identification information corresponding afterwards
Target wlan access point carries out data transmission.The identity information of terminal and the first identification information can be by ends
End when needing to carry out wlan switching active reporting to base station it is also possible to by base station according to wlan's
The performance information of signal intensity and terminal obtains.
It should be noted that the base station in the present embodiment is not the base station in wlan, but remove wlan
Outside other networks in base station, for example, base station in cellular network etc..
Step 102, base station according to the identity information of terminal, to target wlan corresponding to the first identification information
Access point sends association request；Wherein, association request is entered to terminal for request target wlan access point
Row association status are verified.
In the present embodiment, base station sends association request, target wlan to target wlan access point
Access point is associated state verification according to the information in association request to terminal.Association status checking refers to
According to the information in association request, target wlan access point determines whether that this terminal accesses target
Wlan access point.Ssid and bssid of target wlan access point can be included in association request,
The identity information of terminal, address, ability information, listen to interval and supporting rate, and terminal be located
Ssid and bssid of current wlan access point.Information reporting in association request can be given by terminal
Base station is it is also possible to be believed the identity of the terminal carrying out data transmission with it by current wlan access point
Breath, address, ability information, listen to interval and supporting rate, and the ssid of current wlan access point
Report base station, then ssid and bssid being obtained target wlan access point by base station with bssid.
Step 103, base station receive the associated response that target wlan access point sends；Wherein, association rings
The result that terminal is verified should be included by association status.
In the present embodiment, the identity information of terminal is sent to target wlan access point, target by base station
Wlan access point is associated state verification to terminal, and after being proved to be successful, target wlan accesses
Point sends associated response to terminal.Not only include, in associated response, the result that terminal is verified by association status,
The information such as the ability information of target wlan access point, supporting rate, status information can also be included,
The result verified by association status specifically can include the connection identification code of target wlan access point
(association id, abbreviation aid), aid is used for representing that target wlan access point allows terminal
Access target wlan access point.
Step 104, base station send switching execution information according to associated response to terminal；Wherein, switching is held
Row information switches to target wlan for instruction terminal from the corresponding channel of current wlan access point and connects
The corresponding channel of access point, and instruction terminal modification association status information, and terminal and the access of target wlan
Point carries out data transmission.
In the present embodiment, after base station gets association results, send switching execution information to terminal, refer to
Show that terminal switches to the corresponding letter of target wlan access point from the corresponding channel of current wlan access point
Road, is carried out data transmission using the corresponding channel of target wlan access point.Switching execution information includes mesh
The ssid of mark wlan access point, bssid, aid, ability information, supporting rate and corresponding letter
Road information, association status information includes ssid, bssid and aid of target wlan access point.
In prior art, terminal when a wlan access point is switched to another wlan access point,
Association process must be completed by wlan network by terminal, and terminal must be interrupted and current wlan
Data transfer between access point, just can proceed after successfully switching to target wlan access point
Transmission data, this data interruption is not tolerable for the high business of the real-times such as voice, video
, thus reducing the service quality of wlan business.In the present embodiment, by addition to wlan
Base station in other networks replaces terminal to be associated process to target wlan access point, is successfully associated it
Send switching execution information to terminal afterwards, notify terminal to switch from the corresponding channel of current wlan access point
To the corresponding channel of target wlan access point, and change association status information, connect with target wlan
Access point carries out data transmission, and whole association process replaces terminal to complete by base station, in wlan switching
During, terminal is still carried out data transmission with current wlan access point, it is to avoid data interruption existing
As not interfering with the high business of the real-times such as voice, video, the service quality of wlan being effectively ensured.
The changing method of the wlan that the present embodiment provides, base station obtains the identity information and first of terminal
After identification information, according to the identity information of terminal, to target wlan corresponding to the first identification information
Access point sends association request, and receives the associated response that target wlan access point sends, and root
Send switching execution information according to associated response to terminal so that terminal is corresponding from current wlan access point
Channel switches to the corresponding channel of target wlan access point, and changes association status information, with target
Wlan access point carries out data transmission, because association process is by the other networks in addition to wlan
Base station replace terminal completing, in association process, terminal is still carried out with current wlan access point
Data transfer, it is to avoid data interruption phenomenon, does not interfere with the high business of the real-times such as voice, video,
The service quality of wlan has been effectively ensured.
Alternatively, in above-mentioned embodiment illustrated in fig. 2, base station according to the identity information of terminal, to
Target wlan access point corresponding to one identification information sends association request to target wlan access point
After sending association request, the method also includes: base station receives what target wlan access point sent
Association failure response；Base station obtains the second identification information, and determines that the second identification information is corresponding
Wlan access point is as target wlan access point.
In the present embodiment, if terminal is verified not over association status, target wlan accesses
Point sends association failure response to base station, and this association failure response can be a notice base station terminal shape
After the message of state authentication failed or base station transmission association request, target wlan accesses
Not to any message of base station feedback in certain period of time, then base station thinks that SOT state of termination checking is lost to point
Lose.If terminal can send association failed message to terminal, notify not over state verification, base station
Terminal reselects a wlan access point as target wlan access point, and reports to base station
Second identification information, sends association request to target wlan access point corresponding to the second identification information.
Base station can also be selected again according to the performance information of the signal strength measurement report of terminal to report and terminal
Select a wlan access point as target wlan access point, then initiate association request so that end
End can be switched in the good wlan network of Performance comparision it is ensured that the reliability of wlan business.
The changing method flow chart of the wlan that Fig. 3 provides for the embodiment of the present invention two.As shown in figure 3,
On the basis of above-mentioned embodiment illustrated in fig. 2, " base station obtains identity information and first mark of terminal
The implementation of the step for information " specifically includes following steps:
Step 201, the performance information of terminal of base station reception current wlan access point transmission and terminal
Identity information.
In the present embodiment, wlan access point it is being provided data, services the signal intensity of terminal,
The performance informations of terminal such as mean data rate data propagation delay time and the identity information of terminal report base
Stand, wlan access point can be periodically to the performance information of base station reporting terminal and the identity letter of terminal
Breath or base station issue the performance information of reporting terminal and the identity information of terminal after instruction.
Step 202, when base station according to the performance information of terminal determine terminal service quality be less than pre- gating
The list information of candidate's wlan access point during limit value, is sent to terminal.
In the present embodiment, the performance information of the terminal that base station is reported by wlan access point, judges to send out
The service quality of certain terminal existing is less than predetermined threshold value, the then locally stored wlan access point of base station inquiry
Information bank, selects candidate wlan to access point list for this terminal, and candidate wlan is accessed point range
Table is sent to terminal, notifies terminal-pair candidate's wlan access point to carry out signal strength measurement.Service quality
Including any one in the signal intensity of terminal, mean data rate, data transmission delay or this several
Combination, it is also possible to include other information, is not any limitation as in the present invention.
The signal strength measurement report of candidate's wlan access point that step 203, base station receiving terminal send.
In the present embodiment, the signal intensity of terminal-pair candidate wlan access point measures, and generates
Signal strength measurement report is sent to base station.
Step 204, base station determine the first mark according to the performance information of signal strength measurement report and terminal
Information.
In the present embodiment, base station is according to the signal intensity of candidate's wlan access point and candidate
Wlan access point is providing the mean data rate data propagation delay time of the terminal of data, services, is
Terminal selects the identification information of expected service quality preferable wlan access point as the first identification information.
The changing method of the wlan that the present embodiment provides, base station receives current wlan access point and sends
The performance information of terminal and identity information, when the service quality determining terminal according to the performance information of terminal
During less than predetermined threshold value, send candidate wlan to terminal and access point list, the letter that receiving terminal sends
Number strength measurement report, determines the first identification information according to the performance information of measurement report and terminal, then
Identity information further according to terminal is carried out subsequently to target wlan access point corresponding to the first identification information
Association process, in the present embodiment, base station is equivalent to Centralized Controller, is obtained in that global information,
Determine wlan switching time and target wlan access point for terminal, and replace terminal to target wlan
Access point initiates association process, shortens and reconnects time delay, it is to avoid service disconnection, and the switching realizing the overall situation is excellent
Change.
In above-mentioned embodiment illustrated in fig. 2, " identity information of base station terminal and the first identification information " this
One step can also be accomplished by: the identity information of base station receiving terminal and described first mark
Knowledge information.
In the present embodiment, terminal finds the signal intensity fall of current wlan access point in data transfer
Low it is impossible to meet the data transfer of terminal, then terminal is in the interval scan channel of data transfer, measurement week
Enclose the signal intensity of other wlan access points, select the higher wlan of another signal intensity to access
Point is as target wlan access point, and the mark letter by wlan access point higher for this signal intensity
Breath is sent to base station as the identity information of the first identification information and terminal, and terminal can also currently
Ssid and bssid of wlan access point, and terminal ability information, listen to interval and support speed
Rate etc. generates handover trigger information reporting to base station so that base station replaces terminal to be associated process, reduces
Service disconnection is it is ensured that the service quality of wlan.
Alternatively, on the basis of any of the above-described embodiment, base station to terminal send switching execution information it
Afterwards, method also includes: base station sends disassociation information to current wlan access point；Wherein, release
The reason related information includes address and the disassociation of terminal code.
In the present embodiment, after base station sends switching execution information to terminal, also connect to current wlan
Access point sends disassociation information, for notifying current wlan access point must not send number to this terminal again
According in order to avoid causing the waste of loss of data and resource.Base station can also send switching execution information to terminal
While, send disassociation information to current wlan access point.
The changing method flow chart of the wlan that Fig. 4 provides for the embodiment of the present invention three.As shown in figure 4,
The method comprises the steps:
Step 301, terminal receive the switching execution information that base station sends；Wherein, switching execution information is
Base station sends, to target wlan access point, the information obtaining after association request according to the identity information of terminal,
Association request is associated state verification for request target wlan access point to terminal.
In the present embodiment, base station replaces terminal to be associated asking to the access of target wlan, successfully closes
After connection, base station sends switching execution information to terminal, and switching execution information includes target wlan and accesses
The ssid of point, bssid, aid, ability information, supporting rate and corresponding channel information.
It should be noted that the base station in the present embodiment is not the base station in wlan, but remove wlan
Outside other networks in base station, for example, base station in cellular network etc..
Step 302, terminal switch from the corresponding channel of current wlan access point according to switching execution information
To the corresponding channel of target wlan access point, and change association status information.
Wherein, association status information includes identification information and the aid of target wlan access point.
Step 303, terminal and target wlan access point carry out data transmission.
The changing method of the wlan that the present embodiment provides, the switching that terminal receives base station transmission executes letter
Breath, switches to target wlan according to switching execution information from the corresponding channel of current wlan access point
The corresponding channel of access point, and carry out data transmission with target wlan access point, because association process is equal
Terminal is replaced to complete by the base station in the other networks in addition to wlan, in association process, terminal
Still carry out data transmission with current wlan access point, it is to avoid data interruption phenomenon occurs, does not interfere with
The high business of the real-times such as voice, video, has been effectively ensured the service quality of wlan.
The signaling interaction diagram of the changing method of the wlan that Fig. 5 provides for the embodiment of the present invention four.The method
Including the concrete interaction between base station, current wlan access point, target access and terminal, such as
Shown in Fig. 5, comprise the following steps:
Step 401, terminal find that in data transfer the signal intensity of current wlan access point reduces.
Step 402, terminal other wlan around the interval scan channel of data transfer, measurement access
The signal intensity of point, the higher wlan access point of one signal intensity of selection is as target wlan
Access point.
The identity information of terminal and the first identification information are sent to base station by step 403, terminal.
Wherein, the first identification information includes ssid and bssid of target wlan access point, and terminal is also
Can by the ability information of ssid and bssid of current wlan access point and terminal, listen to interval
With information reportings such as supporting rates to base station.
Step 404, base station send association request to target wlan access point.
Wherein, association request includes ssid and bssid of target wlan access point, the identity of terminal
Information, address, ability information, listen to interval and supporting rate, and terminal current service wlan connects
The address of access point.
Step 405, target wlan access point send the associated response of terminal to cellular basestation.
Wherein, associated response includes ability information, supporting rate and the state of target wlan access point
Information.
In the present embodiment, if target wlan access point allows terminal to access, the association fed back
The aid of target wlan access point is comprised in response；If target wlan access point does not allow terminal
Access, then comprise status of fail code in the associated response feeding back, base station notifies user to reselect target
Wlan access point, return to step 402.
Step 406, base station send disassociation information to current wlan access point, and send to terminal
Switching execution information.
Wherein, switching execution information comprise successful association the ssid of target wlan access point,
The channel of bssid, aid, ability information, supporting rate and use, disassociation packet contains terminal
Address and reason-code.
Step 407, terminal, according to switching execution information switching channel, change target wlan access point
Ssid, bssid and aid, start to carry out data transmission with target wlan access point.
The changing method of the wlan that the present embodiment provides, terminal selects a signal intensity higher
Wlan access point is as target wlan access point, and the identity information of terminal and first are identified
Information is sent to base station and reports base station, and base station sends association request to target wlan access point, and
Receive the associated response that target wlan access point sends, and switching is sent to terminal according to associated response and hold
Row information is so that terminal switches to the access of target wlan from the corresponding channel of current wlan access point
The corresponding channel of point, is carried out data transmission with target wlan access point, because base station replaces terminal
Become association process, decrease data interruption phenomenon in wlan handoff procedure, do not interfere with voice, video
The business high etc. real-time, has been effectively ensured the service quality of wlan.
The signaling interaction diagram of the changing method of the wlan that Fig. 6 provides for the embodiment of the present invention five.With Fig. 5
Unlike illustrated embodiment, by base station according to the signal intensity of candidate's wlan access point in the present embodiment
To determine switching time and the target wlan access point of terminal with the performance information of terminal, as shown in fig. 6,
Comprise the following steps:
It is currently provided the performance information of the terminal of data, services by step 501, current wlan access point
Report base station.
Wherein, the performance information of terminal includes the signal intensity of terminal, the transmission of mean data rate data.
The performance information of the terminal that step 502, base station are reported by wlan access point, finds certain eventually
The service quality at end is less than predetermined threshold value, then base station is according to locally stored wlan access-in point information
Storehouse, selects candidate wlan to access point list for this terminal, and this candidate wlan is accessed point list
It is sent to terminal, to notify terminal-pair candidate's wlan access point to carry out signal strength measurement.
In the present embodiment, service quality includes but is not limited to the signal intensity of terminal, mean data rate,
Any one in data transmission delay or this combination of several.
The signal strength measurement report of candidate's wlan access point is reported base station by step 503, terminal.
Step 504, base station are accessed according to the signal intensity of candidate's wlan access point, candidate wlan
The mean data rate data propagation delay time of the current terminal providing data, services of point, is that terminal selects in advance
Phase service quality preferable target wlan access point.
Step 505, base station send association request to target wlan access point.
Wherein, association request comprises ssid and bssid of target wlan access point, the address of terminal,
Ability information, listen to interval and supporting rate, and the address of terminal current wlan access point.
Step 506, target wlan access point send the associated response of terminal to base station.
Wherein, associated response comprises ability information, supporting rate and the state of target wlan access point
Code.
In the present embodiment, if target wlan access point allows terminal to access, the association fed back
Aid is comprised in response；If target wlan access point does not allow terminal to access, the association fed back
Status of fail code is comprised, then return to step 504, base station is terminal selection target wlan again in response
Access point.
Step 507, base station send disassociation information to terminal current service wlan access point, and to
Terminal sends switching execution information.
Wherein, switching execution information comprise successful association the ssid of target wlan access point,
The channel of bssid, aid, ability information, supporting rate and use, disassociation packet contains terminal
Address and reason-code.
Step 508, terminal, according to switching execution information switching channel, change target wlan access point
Ssid, bssid and aid, start to carry out data transmission with target wlan access point.
The changing method of the wlan that the present embodiment provides, base station receives current wlan access point and sends
Terminal performance information, when determined according to the performance information of terminal terminal service quality be less than pre- gating
During limit value, send candidate wlan to terminal and access point list, the signal strength measurement that receiving terminal sends
Report, the performance information according to measurement report and terminal generates handover trigger information, then by except wlan
Outside other networks in base station replace terminal complete association process, in the present embodiment, base station is suitable
In Centralized Controller, it is obtained in that global information, be that terminal determines wlan switching time and target
Wlan access point, and replace terminal to initiate association process to target wlan access point, shortening reconnects
Connect time delay, it is to avoid service disconnection, realize the handover optimization of the overall situation.
The structural representation of the switching device of the wlan that Fig. 7 provides for the embodiment of the present invention six.As Fig. 7
Shown, this device includes acquisition module 11, sending module 12 and receiver module 13.Wherein, obtain mould
Block 11 is used for obtaining identity information and first identification information of terminal；Sending module 12 is used for according to terminal
Identity information, send association request to target wlan access point corresponding to the first identification information；Wherein,
State association request, for request target wlan access point, state verification is associated to terminal；Receiver module
13 are used for receiving the associated response of target wlan access point transmission；Wherein, associated response includes terminal
The result verified by association status；Sending module 12 is additionally operable to send switching according to associated response to terminal
Execution information；Wherein, switching execution information is used for instruction terminal from the corresponding letter of current wlan access point
Road switches to the corresponding channel of target wlan access point, and instruction terminal modification association status information, and
Terminal is carried out data transmission with target wlan access point.
The device of the present embodiment, can be used for executing the technical scheme of embodiment of the method shown in Fig. 2, in fact
Existing principle is similar with technique effect, and here is omitted.
Further, on the basis of above-mentioned embodiment illustrated in fig. 7, acquisition module 11 is specifically for passing through
Receiver module 13 receives the performance information of terminal and the terminal identity information that current wlan access point sends；
When acquisition module 11 is less than predetermined threshold value according to the service quality that the performance information of terminal determines terminal,
Triggering sending module 12 sends the list information of candidate's wlan access point to terminal；Acquisition module 11 is also
The signal strength measurement report of the candidate's wlan access point for being sent by receiver module 13 receiving terminal
Accuse；And the first identification information is determined according to the performance information of signal strength measurement report and terminal.
The device of the present embodiment, can be used for executing the technical scheme of embodiment of the method shown in Fig. 3, in fact
Existing principle is similar with technique effect, and here is omitted.
Further, on the basis of above-mentioned embodiment illustrated in fig. 7, acquisition module 11 is specifically for logical
Cross the identity information of terminal and first identification information of the transmission of receiver module 13 receiving terminal.
Alternatively, sending module is additionally operable to send disassociation information to current wlan access point；Wherein,
The reason disassociation information includes address and the disassociation of terminal code.
Alternatively, receiver module is additionally operable to receive the association failure response that target wlan access point sends；
Acquisition module is additionally operable to obtain the second identification information, and determines that wlan corresponding to the second identification information accesses
Point is as target wlan access point.
The structural representation of the switching device of the wlan that Fig. 8 provides for the embodiment of the present invention seven.As Fig. 8
Shown, this device includes receiver module 21, processing module 22 and sending module 23.Wherein, receive mould
Block 21 is used for receiving the switching execution information of base station transmission；Wherein, described switching execution information is described base
The identity information stood according to described terminal sends, to target wlan access point, the letter obtaining after association request
Breath；Wherein, described association request of stating is used for asking described target wlan access point that described terminal is carried out
Association status are verified；Processing module 22 is used for being accessed from current wlan according to described switching execution information
The corresponding channel of point switches to the corresponding channel of described target wlan access point, and changes association status letter
Breath；Wherein, described association status information includes identification information and the connection of described target wlan access point
Identification code aid；Sending module 23 is used for carrying out data transmission with described target wlan access point.
The device of the present embodiment, can be used for executing the technical scheme of embodiment of the method shown in Fig. 4, in fact
Existing principle is similar with technique effect, and here is omitted.
The embodiment of the present invention also provides a kind of base station, including cutting of the wlan described in embodiment illustrated in fig. 7
Changing device.
The embodiment of the present invention also provides a kind of terminal, including cutting of the wlan described in embodiment illustrated in fig. 8
Changing device.
One of ordinary skill in the art will appreciate that: realize all or part step of above-mentioned each method embodiment
Suddenly can be completed by the related hardware of programmed instruction.Aforesaid program can be stored in a computer can
Read in storage medium.This program upon execution, executes the step including above-mentioned each method embodiment；And
Aforesaid storage medium includes: read only memory (read-only memory, abbreviation rom), random
Access memorizer (random access memory, abbreviation ram), magnetic disc or CD etc. are various permissible
The medium of store program codes.
Last it is noted that various embodiments above is only in order to illustrating technical scheme rather than right
It limits；Although being described in detail to the present invention with reference to foregoing embodiments, this area common
Technical staff it is understood that it still can be modified to the technical scheme described in foregoing embodiments,
Or equivalent is carried out to wherein some or all of technical characteristic；And these modifications or replacement, and
Do not make the scope of the essence disengaging various embodiments of the present invention technical scheme of appropriate technical solution.
Claims (12)
1. a kind of changing method of WLAN wlan is it is characterised in that include:
Base station obtains identity information and first identification information of terminal；Wherein, described base station is except wlan
Outside other networks in base station；
Described base station according to the identity information of described terminal, to target corresponding to described first identification information
Wlan access point sends association request；Wherein, described association request of stating is used for asking described target
Wlan access point is associated state verification to described terminal；
Described base station receives the associated response that described target wlan access point sends；Wherein, described association
Response includes the result that described terminal is verified by described association status；
Described base station sends switching execution information according to described associated response to described terminal；Wherein, described
Switching execution information is used for indicating that described terminal switches to institute from the corresponding channel of current wlan access point
State the corresponding channel of target wlan access point, and indicate described terminal modifications association status information, and institute
State terminal to carry out data transmission with described target wlan access point.
2. method according to claim 1 is it is characterised in that described base station obtains the identity of terminal
Information and the first identification information, specifically include:
Described base station receives the performance information of described terminal and the institute that described current wlan access point sends
State terminal identity information；
Preset when described base station is less than according to the service quality that the performance information of described terminal determines described terminal
The list information of candidate's wlan access point during threshold value, is sent to described terminal；
Described base station receives the signal strength measurement of described candidate's wlan access point that described terminal sends
Report；
Described base station determines described according to the performance information of described signal strength measurement report and described terminal
One identification information.
3. method according to claim 1 is it is characterised in that the identity information of described base station terminal
With the first identification information, specifically include:
Described base station receives the identity information of described terminal and the described first mark letter that described terminal sends
Breath.
4. the method according to any one of claim 1-3 is it is characterised in that described base station is to described
After terminal sends switching execution information, methods described also includes:
Described base station sends disassociation information to described current wlan access point；Wherein, described releasing
The reason related information includes address and the disassociation of described terminal code.
5. method according to claim 4 is it is characterised in that described base station is according to described terminal
Identity information, to target wlan access point corresponding to described first identification information send association request it
Afterwards, methods described also includes:
Described base station receives the association failure response that described target wlan access point sends；
Described base station obtains the second identification information, and determines that wlan corresponding to described second identification information connects
Access point is as target wlan access point.
6. a kind of changing method of WLAN wlan is it is characterised in that include:
Terminal receives the switching execution information that base station sends；Wherein, described switching execution information is described base
The identity information stood according to described terminal sends, to target wlan access point, the letter obtaining after association request
Breath；Wherein, described association request is used for asking described target wlan access point that described terminal is closed
Connection state verification；
Described terminal switches from the corresponding channel of current wlan access point according to described switching execution information
To the corresponding channel of described target wlan access point, and change association status information；Wherein, described pass
Connection status information includes the identification information of described target wlan access point and connects identification code aid；
Described terminal is carried out data transmission with described target wlan access point.
7. a kind of switching device of WLAN wlan is it is characterised in that include:
Acquisition module, for obtaining identity information and first identification information of terminal；
Sending module is for the identity information according to described terminal, corresponding to described first identification information
Target wlan access point sends association request；Wherein, described association request of stating is used for asking described target
Wlan access point is associated state verification to described terminal；
Receiver module, for receiving the associated response that described target wlan access point sends；Wherein, institute
State associated response and include the result that described terminal is verified by described association status；
Described sending module is additionally operable to send switching execution information according to described associated response to described terminal；
Wherein, described switching execution information is used for indicating described terminal from the corresponding channel of current wlan access point
Switch to the corresponding channel of described target wlan access point, and indicate described terminal modifications association status letter
Cease, and described terminal is carried out data transmission with described target wlan access point.
8. device according to claim 7 is it is characterised in that described acquisition module is specifically for logical
Cross described receiver module receive the performance information of described terminal that described current wlan access point sends and
Described terminal identity information；When described acquisition module determines described terminal according to the performance information of described terminal
Service quality be less than predetermined threshold value when, trigger described sending module to described terminal send candidate
The list information of wlan access point；
Described acquisition module is additionally operable to receive, by described receiver module, the described candidate that described terminal sends
The signal strength measurement report of wlan access point；And according to described signal strength measurement report and described end
The performance information at end determines described first identification information.
9. device according to claim 7 is it is characterised in that described acquisition module is specifically for logical
Cross described receiver module and receive the identity information of described terminal and the described first mark letter that described terminal sends
Breath.
10. the device according to any one of claim 7-9 is it is characterised in that described sending module
It is additionally operable to send disassociation information to described current wlan access point；Wherein, described disassociation letter
Cease code the reason include address and the disassociation of described terminal.
11. devices according to claim 10 are it is characterised in that described receiver module is additionally operable to connect
Receive the association failure response that described target wlan access point sends；
Described acquisition module is additionally operable to obtain the second identification information, and determines that described second identification information corresponds to
Wlan access point as target wlan access point.
A kind of 12. switching devices of WLAN wlan are it is characterised in that include:
Receiver module, for receiving the switching execution information of base station transmission；Wherein, described switching executes letter
Cease, for described base station, association request is sent to target wlan access point according to the identity information of described terminal
The information obtaining afterwards；Wherein, described association request of stating is used for asking described target wlan access point to institute
State terminal and be associated state verification；
Processing module, for according to described switching execution information from the corresponding channel of current wlan access point
Switch to the corresponding channel of described target wlan access point, and change association status information；Wherein, institute
State association status information to include the identification information of described target wlan access point and connect identification code aid；
Sending module, for carrying out data transmission with described target wlan access point.
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