CN101801051B - Method and equipment for selecting access points (APs) - Google Patents
Method and equipment for selecting access points (APs) Download PDFInfo
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- CN101801051B CN101801051B CN 201010117475 CN201010117475A CN101801051B CN 101801051 B CN101801051 B CN 101801051B CN 201010117475 CN201010117475 CN 201010117475 CN 201010117475 A CN201010117475 A CN 201010117475A CN 101801051 B CN101801051 B CN 101801051B
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Abstract
The invention discloses a method for selecting access points (APs), comprising the following steps: an access controller (AC) is made to receive the information on the same client side, which is reported by all access points (APs), and the AC is made to select the APs of the client side according to the information on the client side, which is reported by all the APs; the AC is made to dynamically allot the special media access control (MAC) which is used to communicate with the client side to the selected APs, send the special MAC to the APs and communicate with the client side by the APs according to the special MAC. In the invention, the selection of the APs by the user can be controlled by the client side, and the work load of the client side can be reduced.
Description
Technical field
The present invention relates to areas of information technology, particularly relate to system of selection and the equipment of a kind of AP of access.
Background technology
WLAN (Wireless Local Area Networks, WLAN (wireless local area network)) provides a kind of wireless connections service of local area network (LAN), and wireless data access at a high speed can be provided, and has been widely used in the various places such as city, enterprise, building, family.Compare with traditional Wired access mode, WLAN (wireless local area network) makes the user of network freer, thoroughly broken away from the constraint of cable and port position, and WLAN (wireless local area network) is so that terminal has is easy to carry, be easy to the advantages such as mobile, removed or reduced numerous and diverse network layout from, only need to lay one or more AP (Access Point, access point) equipment and just can set up the LAN that covers whole building or area.
As shown in Figure 1, be a kind of typical networking schematic diagram among the WLAN, wherein, AC (AccessController, Radio Access Controller) as access controller AP is managed and controls, AP is responsible for receiving the blank-interface text of STA (station, client), and will send to client from the message of cable network.
As shown in Figure 2, for the client based on WLAN typically connects schematic flow sheet, comprising:
(1), client sends Probe request (probe requests thereby) to AP.
(2), AP returns Probe response (probe response) to client.
Concrete, when the user attempted initiatively to seek network, then this client can initiatively scan wireless network environment on every side, so that client can know whether there is spendable wireless service by the mode of active scan.When not carrying SSID (Service set identification, service set identifier) information in Probe request, the scanning process of corresponding above-mentioned (1) and (2) is specially:
Client sends Probe Request (SSID is null), and wherein, because client is provided with a channel list in advance, then client can be broadcasted Probe request by the channel in this channel list.
After AP (can be a plurality of AP) receives this Probe request, will respond Probe response, and client can select the strongest AP of signal to carry out association.
(3), client sends Authenticate request (authentication request) by AP to AC.
(4), AC returns Authenticate response (authentication response) by AP to client.
Concrete, in order to prevent disabled user's access, need between client and AC, set up verification process, wherein, corresponding authentication mechanism comprises open system authentication and shared key authentication etc., only have client to pass through authentication after, just can enter into association phase.
(5), client sends associate request (related request) by AP to AC.
(6), AC returns associate response (associated response) by AP to client.
Concrete, if the user need to be linked into wireless network by AP, then client must be carried out relatedly with specific AP, and wherein, client can select the strongest AP of signal to carry out association.After client receives the associated response of AC by AP, namely can carry out association with corresponding AP (AP that for example, signal is the strongest).
In the prior art, in the WLAN of highly dense deployment, the same area need to be covered jointly by a plurality of AP, to promote user's access amount and each user's network signal situation, and a plurality of AP have identical SSID, at this moment, the client AP information that can scan according to oneself is decided in its sole discretion and is linked on which AP.
Yet, when the AP information that client scans according to oneself decides which AP of access, the control dynamics of network side very a little less than, in the situation of highly dense deployment, when particularly the situations such as access is unbalanced appearred in zone easily, the overall performance of network was very poor.
In addition, because client need in the enterprising line scanning of each channel, to determine being linked into which AP, at this moment, consume the energy of client, and take simultaneously interface-free resources; And client can not guarantee to realize the optimal location of whole network when selecting AP voluntarily according to the standard of self.
Summary of the invention
The invention provides system of selection and the equipment of a kind of AP of access, to be determined the access AP of client by network side, strengthened the control dynamics of network side.
In order to achieve the above object, the present invention proposes the system of selection of a kind of AP of access, be applied to comprise in the WLAN (wireless local area network) of Radio Access Controller AC, client and a plurality of AP composition, said method comprising the steps of:
Described AC receives the information of the described same client that each AP reports, and the access AP of the described client of Information Selection of the described client that reports according to each AP;
Described AC is the dedicated medium access control MAC that selected access AP dynamic assignment and described client communicate, and should send to described access AP by special use MAC, and is communicated according to described special-purpose MAC and described client by this access AP;
Wherein, when described client moved and need to switch to another AP and communicates between each AP of described AC control, described method further comprised:
The information of the described same client that described AC reports according to each AP is that described client is selected access AP again, and the access AP of notice before the switching information of deleting described special-purpose MAC; And described special-purpose MAC sent to access AP after the switching, communicated according to described special-purpose MAC and described client by the access AP after the described switching.
The information that described AC selection accesses the client of AP institute foundation is specially one or more in the following information: signal strength signal intensity, perceived noisiness, transmission frequency that the same client that each AP receives is corresponding.
Described special-purpose MAC be described AC according to the client number that self can support, the MAC Address of the some that reserves in advance, and after AC selected access AP, dynamic random was that selected access AP distributes.
Described access AP further safeguards the corresponding relation of described special-purpose MAC and described client behind the special-purpose MAC that receives described AC distribution, and communicates according to this corresponding relation and described client.
A kind of Radio Access Controller AC is applied to comprise that described AC comprises in the WLAN (wireless local area network) of AC, client and a plurality of AP:
Transceiver module be used for to receive the information of the same client that each AP reports, and the special-purpose MAC that described AC is distributed sends to selected access AP;
Select module, be connected with described transceiver module, be used for the access AP according to the described client of Information Selection of described client;
Distribution module, be connected with described transceiver module, being used in described selection module is after described client chooses access AP, for described access AP distributes special-purpose MAC, and by described transceiver module the special-purpose MAC of described distribution is sent to selected access AP, and communicated according to described special-purpose MAC and described client by this access AP;
Wherein, when between described client each AP in described AC control and management, move, and need to switch to when communicating on another AP,
Described selection module also is used for, and the information of the described same client that again reports according to each AP is that described client is selected access AP again;
Described transceiver module also is used for, the information that the access AP before notice is switched deletes described special-purpose MAC; And described special-purpose MAC sent to access AP after the switching, communicated according to described special-purpose MAC and described client by the access AP after the described switching.
The information that described selection module selection accesses the client of AP institute foundation is specially one or more in the following information: signal strength signal intensity, perceived noisiness, transmission frequency that the same client that each AP receives is corresponding;
Described special-purpose MAC be described AC according to the client number that self can support, the MAC Address of the some that in distribution module, reserves in advance, and after AC selects access AP, be that selected access AP distributes by the distribution module dynamic random further.
A kind of wireless access point AP is applied to comprise that described each AP includes in the WLAN (wireless local area network) of AC, client and a plurality of AP composition:
Transceiver module is used for information reporting with described client to described AC, and the information of the client that reports according to each AP at described AC is the access AP that selects of described client during for self, and receiving described AC is the special-purpose MAC that described client is distributed; And described special-purpose MAC sent to described client in order to communicate with it;
Maintenance module is connected with described transceiver module, is used for safeguarding the corresponding relation of described special-purpose MAC and described client, and is communicated according to this corresponding relation and described client by described transceiver module.
When between client each AP in described AC control and management, move, and need to switch to when communicating on another AP,
For the access AP before switching, described transceiver module also is used for, and receives the notice of described AC, to delete the corresponding relation of special-purpose MAC described in the described maintenance module and described client;
For the access AP after switching, described transceiver module also is used for, receive the described special-purpose MAC that distributes to the access AP before switching that described AC sends, and should send to maintenance module by special use MAC, so that the described special-purpose MAC on the rear described access AP of maintenance switching and the corresponding relation of described client.
Compared with prior art, the present invention has the following advantages:
Among the present invention, realized network side to the control of user selection access AP, thereby can realize more easily the optimal location of Radio Access Network integral body, and client also can not be used in all channels and carry out scanning search, alleviate the live load of client.When in the scope of client at same AC roaming occuring, then the roaming of client is rapid, does not need the process that accesses through again.
Description of drawings
Fig. 1 is a kind of typical networking schematic diagram among the WLAN in the prior art;
Fig. 2 is that the client based on WLAN typically connects schematic flow sheet in the prior art;
Fig. 3 is the system of selection flow chart of a kind of AP of access of proposing of the present invention;
Fig. 4 is the system of selection flow chart of a kind of AP of access of proposing under a kind of application scenarios;
Fig. 5 is a kind of Radio Access Controller AC structure chart that the present invention proposes;
Fig. 6 is a kind of wireless access point AP structure chart that the present invention proposes.
Embodiment
Basic thought of the present invention is, collected the information of client by each AP, and with the information reporting of client to AC, and AC receives the information of the same client that each AP reports, and the access AP of this client of Information Selection of the client that reports according to each AP, thereby the access AP by AC determines client is linked into this access AP so that AC can control this client.In addition, it is that this client is distributed a special-purpose MAC that AC passes through, and should be handed down to this access AP by special use MAC, thereby so that this access AP can use this special use MAC and this client to communicate.
Based on above-mentioned thought, the invention provides the system of selection of a kind of AP of access, be applied to comprise that as shown in Figure 3, the method may further comprise the steps in the WLAN (wireless local area network) of AC, client and a plurality of AP:
Step 301, each AP sends to AC with the information of the client that receives.Wherein, the information of this client includes but not limited to: the signal strength signal intensity of client, perceived noisiness, transmission frequency etc.
Concrete, when client initially accesses, will send Probe request by the mode of broadcasting, at this moment, each AP can be known the information of this client, because this process is prior art, gives unnecessary details no longer in detail among the present invention.Know the information of this client as each AP after, the information of this client that each AP need to will receive sends to AC.
Step 302, AC receives the information of the same client that each AP reports, and the access AP corresponding to this client of Information Selection of the client that reports according to each AP.
Concrete, the information of the client that reports according to each AP, this AC can determine the optimum access AP of this client, and selects this optimum access AP as access AP corresponding to this client.For example, when AC knew that according to the signal strength signal intensity of client signal strength signal intensity between client and the AP1 is the strongest, then AC can select AP1 as access AP corresponding to this client.
Need to prove in the present invention, have optimum loading condition in order to make each AP, this AC can also determine the access AP that this client is corresponding according to the information of client and the loading condition of each AP.For example, when AC knows that according to the signal strength signal intensity of client signal strength signal intensity between client and AP1, the AP2 is similar, and the load of the duty ratio AP2 of AP1 is when many, and then AC can select AP2 as access AP corresponding to this client.Again for example, although the signal strength signal intensity between client and the AP1 will be higher than the signal strength signal intensity between client and the AP2, the load of AP1 is a lot, in the time of can't supporting the normal use of client, at this moment, AC also can select AP2 as access AP corresponding to this client.
In sum, AC can consider the information of client and the situation of network side, for client is selected optimum access AP, thereby has strengthened the control dynamics of network side.
Step 303, AC is the special-purpose MAC (Media Access Control, medium access control) that one of selected access AP dynamic assignment and described client are carried out information interaction.Wherein, for each client, AC all needs to distribute for the AP that selects access the special-purpose MAC of a correspondence, and the AP of this selection access will use this special use MAC and described client to carry out information interaction.
Need to prove that the special-purpose MAC among the present invention is that AC need to be according to the client number that self can support, the MAC Address of the some that reserves in advance, and after AC selected access AP, dynamic random was that selected access AP distributes.
And because above-mentioned special-purpose MAC is the MAC Address that AC reserves in advance according to the client number that self can support, thereby has guaranteed and to have distributed a unique special-purpose MAC who communicates with this client for the corresponding access of the client of each access AP.In addition, because special-purpose MAC is dynamic assignment, and usage space can be limited to certain limit, therefore, in fact the AC of different geographical can reuse same MAC, has then further guaranteed to distribute a unique special-purpose MAC who communicates with this client for the corresponding access of the client of each access AP.
Be understandable that when AC is after client has been selected corresponding access AP, the special-purpose MAC among the present invention is that AC is this access AP dynamic assignment, and this access AP can only use this special use MAC and above-mentioned client to communicate.If AP is during as the access AP of a plurality of clients, then this AP will have a plurality of special-purpose MAC, and use each special-purpose MAC to communicate with corresponding client.
Step 304, AC is handed down to the special-purpose MAC of described distribution the access AP of this client.For example, 1 corresponding access AP has distributed special-purpose MAC1 for client, and the access AP of this client 1 then needs this special use MAC1 is handed down to AP1 when being AP1.
Step 305 after access AP receives the special-purpose MAC of AC distribution, is safeguarded the corresponding relation of this special use MAC and client.
Concrete, this access AP can be by showing to safeguard the corresponding relation of this special use MAC and client with the special-purpose MAC shown in the table 1, certainly, in actual applications, also can safeguard by using other modes, as long as on access AP, can store the corresponding relation of this special use MAC and client, enumerate no longer one by one among the present invention.
Table 1
| Special-purpose MAC | Client |
| Special-purpose MAC1 | Client 1 |
| Special-purpose MAC2 | Client 2 |
Step 306, access AP should send to corresponding client by special use MAC.Wherein, this access AP can should send to corresponding client by special use MAC in probe response.Certainly, in the practical application, can also by other means special-purpose MAC be sent to corresponding client, for example, by message A special-purpose MAC be sent to corresponding client, repeat no more among the present invention.
Step 307, access AP is by using this special use MAC to communicate with corresponding client.Wherein, in the process that access AP and client communicate, the MAC that special-purpose MAC need to be communicated as self and client, and also client also needs this special use MAC as the MAC that accesses AP, and communicate with this access AP.
Concrete, when access AP sends data to client, need to from special-purpose MAC table, inquire the corresponding relation of client and special-purpose MAC, and should special use MAC as self MAC, thereby use this special use MAC to send data to client.Same, when client sends data to access AP owing in the client information corresponding to this special use MAC has been arranged, then can with should special use MAC as the reception MAC of access AP, and receive access AP corresponding to MAC to this and send data.
For example, when access AP need to send data to client 1, know that according to special-purpose MAC table corresponding special-purpose MAC is special-purpose MAC1, then accessing AP need to be with the MAC of special-purpose MAC1 as self, and uses this special use MAC1 to send data to client 1.In addition, when access AP need to send data to client 2, know that according to special-purpose MAC table corresponding special-purpose MAC is special-purpose MAC2, then accessing AP need to be with the MAC of special-purpose MAC2 as self, and uses this special use MAC2 to send data to client 2.
It should be noted that, because when different client communicates, access AP need to use different special-purpose MAC, then can not send beacon (beacon) in the mode of broadcasting to each client again among the present invention, therefore, among the present invention, access AP needs to send beacon beacon according to default cycle clean culture to each client of self correspondence, to inform existing of self to client.Wherein, send beacon beacon to each client, this access AP need to be known the corresponding relation of client and special-purpose MAC from special-purpose MAC table, and uses this special use MAC to send beacon beacon to the client of correspondence.
In addition, in the present invention, when client moves in the scope of AC control, each AP can listen to the information of this client, and since each AP need to the information of client regularly send to AC, then when client is moved, the information of the same client that AC can report according to each AP is for this client reselects access AP.For example, when AC knows that according to the information of client signal strength signal intensity between client and the AP1 is higher than signal strength signal intensity between client and the AP2 (the current access AP of client), then AC can reselect AP1 as the access AP of this client, thereby has increased the control dynamics of AC.In this case, namely when described client moves and need to switch to another AP and communicates between each AP of described AC control, in the method provided by the invention, can also may further comprise the steps:
Step 308, the information that the access AP before the AC notice is switched deletes special-purpose MAC; And should special use MAC send to access AP after the switching, communicated according to this special use MAC and client by the access AP after this switching.
Concrete, for the access AP before switching, need the special-purpose MAC of deletion self maintained and the corresponding relation of client; And for the access AP after switching, then need to safeguard the corresponding relation of this special use MAC and client, and use this special use MAC and client to communicate that this maintenance mode and communication mode be by the agency of in the above, in this no longer in detail explanation.
In summary it can be seen, when the access AP of client switches to AP1 from AP2, corresponding processing procedure only occurs between AC and AP, this client does not need the access AP that knows self to change, and this client can continue to use self corresponding special-purpose MAC, and (special-purpose MAC corresponding to this client can not change, just use the access AP of this special use MAC to become AP1 by AP2) communicate with corresponding access AP, thereby reduced the live load of client, save the energy of client, and saved simultaneously interface-free resources.
Wherein, the inventive method can be adjusted each step order according to actual needs.
For the technical scheme that illustrates that more clearly the present invention proposes, below in conjunction with detailed process shown in Figure 4 the present invention is further detailed.In Fig. 4, describe as an example of the application scenarios of 2 AP (AP1 and AP2) example.
Step 402, AP1 and AP2 send to AC with the information of the client that receives.Wherein, the information of this client includes but not limited to: the signal strength signal intensity of client, perceived noisiness, transmission frequency etc.
Step 403, AC receives the information of the same client that each AP reports, and the access AP corresponding to this client of Information Selection of the same client that reports according to each AP.The access AP corresponding take AC selection AP1 as this client is as example.Further, when selecting after AP1 is access AP corresponding to this client, this AC need to carry out for one of AP1 dynamic assignment and described client the special-purpose MAC of information interaction.
Step 404, AC notice AP1 responds client with this special use MAC, it is self MAC that AP1 increases this special use MAC, and should special use MAC as the MAC that communicates with this client.
Step 406, client receives the MAC of its information with the MAC that carries among the probe response as AP1, and according to this reception MAC (be above-mentioned AC be AP1 distribute to special-purpose MAC that should client) carry out the transmission of subsequent packet.
Step 407, when AP1 and AP2 received the message that client sends according to this reception MAC, AP1 checked that receiving MAC is the MAC of self, namely can receive the subsequent packet of this client, and AP2 checks that receiving MAC is not the MAC of self, then rejects the subsequent packet of this client.
Concrete, each AP is by checking the reception MAC in the client message, if the information of this reception MAC is arranged in the MAC information of confirming self to preserve, then can accept the message of this client, otherwise, do not accept the message of this client, thereby reach the purpose that the control client accesses specific AP.
By using above-mentioned handling process, namely can finish the data handling procedure between client and the AP, namely AP1 is by using corresponding special-purpose MAC and the client of client to carry out data interaction.
It should be noted that, AP1 just with client (for example, client 1) carries out in the process of data interaction, just can use the special-purpose MAC of this client 1 correspondence, if AP1 need to other clients (for example, client 2) carries out data interaction, then need to use the special-purpose MAC of other client 2 correspondences.
In addition, when AP1 need to network in other network equipments when carrying out data interaction, then not needing to use AC is the special-purpose MAC that each client is distributed, this AP1 can use the fixedly MAC of self and other network equipments to carry out data interaction, this process is given unnecessary details among the present invention no longer in detail owing to be prior art.
In addition, when client is moved in the scope of this AC control, each AP can listen to the information of this client, and the information that will listen to this client sends to AC, and the information of the same client that AC can report according to each AP, for this client reselects access AP, in view of the situation, the method also further may further comprise the steps:
Step 408, AP1 and AP2 regularly report the information of this client to AC.
Step 409, when AC determined that according to the information of the client that receives the client needs switch to AP2, it was access AP corresponding to this client that AC selects AP2.Wherein, the information of the same client that reports according to each AP, signal strength signal intensity between AC discovery AP1 and the client worse and worse, and the signal strength signal intensity between AP2 and the client is more and more stronger, and when the signal strength signal intensity between AP2 and the client is higher than signal strength signal intensity between AP1 and the client, then AC determines that client need to switch on the AP2, and at this moment, it is access AP corresponding to this client that AC need to select AP2.
Step 410, it is the MAC of AP2 self that AC notice AP2 increases special-purpose MAC corresponding to this client, and notice AP1 deletes special-purpose MAC corresponding to this client.Further, according to the announcement information of AC, this AP2 increases special-purpose MAC corresponding to this client and is the MAC of self, and this AP1 need to delete the special-purpose MAC of this client, and namely this AP1 deletes the corresponding relation of this client and this special use MAC.
Step 411, client continue to use above-mentioned MAC as the MAC of its information of reception, and continue to use above-mentioned MAC to carry out the transmission of message.
Step 412, when AP1 and AP2 received the message that client sends according to this reception MAC, AP1 checked that receiving MAC is not the MAC of self, needs the subsequent packet of this client of rejection; And AP2 checks that receiving MAC is the MAC of self, can receive the subsequent packet of this client.
Wherein, the inventive method can be adjusted each step order according to actual needs.
Based on the inventive concept same with said method, the invention allows for a kind of Radio Access Controller AC, be applied to comprise in the WLAN (wireless local area network) of AC, client and a plurality of AP, as shown in Figure 5, described AC further comprises transceiver module 10, selects module 20 and distribution module 30, and described selection module 20 is connected with described transceiver module 10, and described distribution module 30 is connected with described transceiver module 10, wherein
It should be noted that, in the present invention, when client moves in the scope of AC control, each AP can listen to the information of this client, and since each AP need to the information of client regularly send to AC, then when client is moved, the information of the same client that AC can report according to each AP is for this client reselects access AP.
In view of the situation, when between described client each AP in described AC control and management, move, and need to switch to when communicating on another AP, if selecting module 20 is after described client has been selected access AP again, described transceiver module 10 also is used for, the information that the access AP before notice is switched deletes described special-purpose MAC; And described special-purpose MAC sent to access AP after the switching, communicated according to described special-purpose MAC and described client by the access AP after the described switching.
Concrete, the information of the same client that reports according to each AP is selected module 20 can determine the optimum access AP of this client, and is selected this optimum access AP as access AP corresponding to this client.For example, when knowing that according to the signal strength signal intensity of client signal strength signal intensity between client and the AP1 is the strongest, then select module 20 can select AP1 as access AP corresponding to this client.
It should be noted that, in the present invention, when between described client each AP in described AC control and management, move, and need to switch to when communicating on another AP, described selection module 20 also needs again the information of the described same client that reports according to each AP, is that described client is selected access AP again.
Concrete, described special-purpose MAC is that described AC is according to the client number that self can support, the MAC Address of the some that in distribution module 30, reserves in advance, and after AC selects access AP, be that selected access AP distributes by distribution module 30 dynamic randoms further.
Be understandable that when selecting module 20 selected corresponding access AP for client after, above-mentioned special-purpose MAC is that distribution module 30 is this access AP dynamic assignment, and this access AP can only use this special use MAC and above-mentioned client to communicate.
Wherein, the modules of apparatus of the present invention can be integrated in one, and also can separate deployment.Above-mentioned module can be merged into a module, also can further split into a plurality of submodules.
Inventive concept based on same with said method the invention allows for a kind of wireless access point AP, is applied to comprise that as shown in Figure 6, described each AP includes in the WLAN (wireless local area network) of AC, client and a plurality of AP composition:
Concrete, after transceiver module 40 sent to described client with described special-purpose MAC, transceiver module 40 also needed to communicate according to this special use MAC and described client.Wherein, in the process that transceiver module 40 and client communicate, the MAC that special-purpose MAC need to be communicated as this AP and client, and client also needs the MAC as this access AP with this special use MAC, and communicate with transceiver module 40 among this access AP.Further, when access AP sends data by transceiver module 40 to client, need to obtain the corresponding relation of client and special-purpose MAC, and should special use MAC as self MAC, thereby use this special use MAC to send data to client.
It should be noted that, in the present invention, when client moves in the scope of AC control, each AP can listen to the information of this client, and since each AP need to the information of client regularly send to AC, then when client is moved, the information of the same client that AC can report according to each AP is for this client reselects access AP.
In view of the situation, when between described client each AP in described AC control and management, move, and need to switch to when communicating on another AP, after AC has reselected access AP for this client,
For the access AP before switching, described transceiver module 40 also is used for receiving the notice of described AC, to delete the corresponding relation of special-purpose MAC described in the described maintenance module 50 and described client; Wherein, the notice of the described AC of this reception is used for the information that the access AP before described AC notice is switched deletes described special-purpose MAC.
And for the access AP after switching, described transceiver module 40 also is used for receiving the described special-purpose MAC that distributes to the access AP before switching that described AC sends, and should send to maintenance module 50 by special use MAC, so that the described special-purpose MAC on the rear described access AP of maintenance switching and the corresponding relation of described client.
Concrete, behind the special-purpose MAC that receives the AC distribution, maintenance module 50 need to be the corresponding relation of described special-purpose MAC and described client, wherein, this maintenance module 50 can be by showing to safeguard the corresponding relation of this special use MAC and client with special-purpose MAC.
Wherein, the modules of apparatus of the present invention can be integrated in one, and also can separate deployment.Above-mentioned module can be merged into a module, also can further split into a plurality of submodules.
Through the above description of the embodiments, those skilled in the art can be well understood to the present invention and can realize by hardware, also can realize by the mode that software adds necessary general hardware platform.Based on such understanding, technical scheme of the present invention can embody with the form of software product, it (can be CD-ROM that this software product can be stored in a non-volatile memory medium, USB flash disk, portable hard drive etc.) in, comprise some instructions with so that computer equipment (can be personal computer, server, the perhaps network equipment etc.) carry out the described method of each embodiment of the present invention.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, the module in the accompanying drawing or flow process might not be that enforcement the present invention is necessary.
It will be appreciated by those skilled in the art that the module in the device among the embodiment can be distributed in the device of embodiment according to the embodiment description, also can carry out respective change and be arranged in the one or more devices that are different from present embodiment.The module of above-described embodiment can be merged into a module, also can further split into a plurality of submodules.
The invention described above sequence number does not represent the quality of embodiment just to description.
More than disclosed only be several specific embodiment of the present invention, still, the present invention is not limited thereto, the changes that any person skilled in the art can think of all should fall into protection scope of the present invention.
Claims (7)
1. system of selection that accesses AP is applied to comprise in the WLAN (wireless local area network) of Radio Access Controller AC, client and a plurality of AP composition, it is characterized in that, said method comprising the steps of:
Described AC receives the information of the described same client that each AP reports, and the access AP of the described client of Information Selection of the described client that reports according to each AP;
Described AC is the dedicated medium access control MAC that selected access AP dynamic assignment and described client communicate, and should send to described access AP by special use MAC, and is communicated according to described special-purpose MAC and described client by this access AP;
Wherein, when described client moved and need to switch to another AP and communicates between each AP of described AC control, described method further comprised:
The information of the described same client that described AC reports according to each AP is that described client is selected access AP again, and the access AP of notice before the switching information of deleting described special-purpose MAC; And described special-purpose MAC sent to access AP after the switching, communicated according to described special-purpose MAC and described client by the access AP after the described switching.
2. the method for claim 1 is characterized in that: described AC selects the information of the client of access AP institute foundation to be specially in the following information one or more: signal strength signal intensity, perceived noisiness, transmission frequency that the same client that each AP receives is corresponding.
3. method as claimed in claim 2, it is characterized in that: described special-purpose MAC is that described AC is according to the client number that self can support, the MAC Address of the some that reserves in advance, and after AC selected access AP, dynamic random was that selected access AP distributes.
4. method as claimed in claim 3 is characterized in that, described access AP further safeguards the corresponding relation of described special-purpose MAC and described client behind the special-purpose MAC that receives described AC distribution, and communicates according to this corresponding relation and described client.
5. a Radio Access Controller AC is applied to comprise in the WLAN (wireless local area network) of AC, client and a plurality of AP, and it is characterized in that, described AC comprises:
Transceiver module be used for to receive the information of the same client that each AP reports, and the special-purpose MAC that described AC is distributed sends to selected access AP;
Select module, be connected with described transceiver module, be used for the access AP according to the described client of Information Selection of described client;
Distribution module, be connected with described transceiver module, being used in described selection module is after described client chooses access AP, for described access AP distributes special-purpose MAC, and by described transceiver module the special-purpose MAC of described distribution is sent to selected access AP, and communicated according to described special-purpose MAC and described client by this access AP;
Wherein, when between described client each AP in described AC control and management, move, and need to switch to when communicating on another AP,
Described selection module also is used for, and the information of the described same client that again reports according to each AP is that described client is selected access AP again;
Described transceiver module also is used for, the information that the access AP before notice is switched deletes described special-purpose MAC; And described special-purpose MAC sent to access AP after the switching, communicated according to described special-purpose MAC and described client by the access AP after the described switching.
6. AC as claimed in claim 5 is characterized in that, the information that described selection module selection accesses the client of AP institute foundation is specially one or more in the following information: signal strength signal intensity, perceived noisiness, transmission frequency that the same client that each AP receives is corresponding;
Described special-purpose MAC be described AC according to the client number that self can support, the MAC Address of the some that in distribution module, reserves in advance, and after AC selects access AP, be that selected access AP distributes by the distribution module dynamic random further.
7. a wireless access point AP is applied to comprise in the WLAN (wireless local area network) of AC, client and a plurality of AP composition, it is characterized in that described each AP includes:
Transceiver module is used for information reporting with described client to described AC, and the information of the client that reports according to each AP at described AC is the access AP that selects of described client during for self, and receiving described AC is the special-purpose MAC that described client is distributed; And described special-purpose MAC sent to described client in order to communicate with it;
Maintenance module is connected with described transceiver module, is used for safeguarding the corresponding relation of described special-purpose MAC and described client, and is communicated according to this corresponding relation and described client by described transceiver module;
Wherein, when between client each AP in described AC control and management, move, and need to switch to when communicating on another AP,
For the access AP before switching, described transceiver module also is used for, and receives the notice of described AC, to delete the corresponding relation of special-purpose MAC described in the described maintenance module and described client;
For the access AP after switching, described transceiver module also is used for, receive the described special-purpose MAC that distributes to the access AP before switching that described AC sends, and should send to maintenance module by special use MAC, so that the described special-purpose MAC on the rear described access AP of maintenance switching and the corresponding relation of described client.
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