CN201290123Y - Device for sharing wireless network resource - Google Patents

Abstract

The utility model provides an apparatus for implementing wireless network resource sharing, suitable for providing wireless LAN of infinite connection service for multiple wireless terminals by multiple access point, comprising an active access point election module for mutually comparing each load level and priority for electing active access point by a manner of real time alternating load level message between multiple access points, wherein the active access point permits wireless terminal access; a pending access point setting module for setting other access points as the pending access points based on the active access point obtained by the active access point election module, wherein the pending access points reject wireless terminal access. The apparatus of the utility model overcomes defects that the implement of load distribution in prior art depends on control of access point (AP) external service controller or only aims at special STA user group application, and resolves problem of implement of dynamic load distribution between access points (AP) by full utilization of effective resource.

Description

A kind of device of realizing that wireless network resource is shared

Technical field

The utility model relates to communication technical field, relates in particular to when wireless local area network building, realizes the device that wireless network resource is shared.

Background technology

IEEE 802.11 WLAN (WLAN) can be by a plurality of AP (Access Point, access point) provides the wireless connections service for a plurality of mobile radio terminals (STA), for example in a certain building, be distributed with a plurality of access point AP, make STA move any one access point AP that can be linked into wherein arbitrarily in building, this STA utilizes beacon (Beacon) frame signal intensity to select a best access point AP of signal to insert.But when when this WLAN increases the quantity of STA, different AP will face different traffic loads, and will become excess load and operational efficiency of those AP that insert more STA relatively descends.Therefore in order effectively to utilize the AP resource, need to regulate the offered load of each AP to reduce network congestion.

In the prior art, generally adopt following several method to regulate the offered load of each AP:

Method one, AP send beacon frame to STA in its effective coverage range, to the load horizontal information of STA broadcast transmission AP, STA utilizes the signal strength signal intensity and the load horizontal information of beacon frame simultaneously, and which AP decision is linked into;

Whether load level and this STA that the access of method two, AP permission or refusal STA is based on AP can be associated with other AP.STA to AP send can related other AP indication information, AP allows or refuses this STA access based on own load decision;

Method three, monitor the load of each AP, and control STA is linked into certain AP by a service controller.

Analyze above prior art, can find to have the following disadvantages:

In method one and method two, the load horizontal information that AP sends to STA, and STA to AP send can related other AP indication information be not standard information, have only the specific STA and the AP that support or discern these information could use this two kinds of methods, make the use of STA be subjected to certain restriction.And in method three, need service controller beyond the AP to control the load of AP, and promptly increased network cost, reduced the flexibility of networking again.

The utility model content

In order to address the above problem, the purpose of this utility model provides a kind of device of realizing that the WLAN (wireless local area network) access-in resource is shared, overcome the realization of load balancing in the prior art and depend on the control of AP external service controller or the defective that can only use at specific STA customer group, solve and make full use of the problem that efficient resource is realized dynamic load leveling between AP.

For achieving the above object, the utility model provides a kind of device of realizing that wireless network resource is shared, is used for being the WLAN that a plurality of wireless terminals provide wireless connections to serve by a plurality of access points, comprising:

Movable access point is elected module, is used for passing through between a plurality of access points the mode of the horizontal message of real-time, interactive load, and load level more separately and priority elect movable access point mutually, and described movable access point allows wireless terminal to insert; And

Wait for that access point is provided with module, be used for the movable access point that obtains according to described movable access point election module, all the other access points are made as the wait access point, described wait access point refusal wireless terminal inserts.

Preferably, described movable access point election module comprises:

Setup unit is used for setting the election time period when this access point refusal mobile radio terminal inserts;

Judging unit, judge that the current time is not in the election time period of setting, if send the horizontal message of load of this access point and receive the horizontal message of load of other access point, otherwise this access point is made as movable access point and allows mobile radio terminal to insert; And

The horizontal comparing unit of load, be used to carry out the load level relatively, if be compared the load level of the load level of access point less than this access point, the load level that perhaps is compared access point equals the load level of this access point and is compared access point priority to be higher than this access point, and this access point is made as to be waited for access point and stop to send the horizontal message of load.

Preferably, described device also comprises:

Regularly sending module is used for movable access point initiatively to waiting for that access point regularly sends the load level of the horizontal information bulletin of load oneself;

Initiate the new movable access point module of election, be used for the load level in activity access point monitors oneself, when the load level of movable access point increased, movable access point was initiated the process of the new movable access point of election;

Judge module, be used for receiving the horizontal message of load of other access point at movable access point, when the load level that has a certain wait access point is lower than the load level of movable access point, or the load level that the has a certain wait access point priority that equals the load level of movable access point and these points to be accessed is made as the wait access point with movable access point when being higher than movable access point.

Preferably, after electing movable access point, described wait access point is provided with module and carries out following treatment step: wait for the horizontal message of load and the self check of access point reception activity access point, when the load level of waiting for access point during less than the load level of movable access point, when maybe the priority that equals the load level of movable access point and wait for access point when the load level of waiting for access point is higher than movable access point, wait for that access point initiates the process of the new movable access point of election.

Preferably, the treatment step that described wait access point is provided with the module execution also comprises: wait for that access point receives the horizontal message of load that other waits for access point, when having another load level of waiting for access point less than the load level of current active access point, or exist another load level of waiting for access point equal the current active access point the load level and this another wait for access point priority when being higher than the current active access point, wait for that access point waits for that with this another access point is as new movable access point.

Preferably, the treatment step that described wait access point is provided with module also comprises: wait for the on-line operation situation of access point according to the horizontal message detection activity of the load of movable access point access point, when waiting for that access point detects movable access point operation exception, wait for that access point initiates the process of the new movable access point of election.

Technique scheme has following beneficial effect:

(1) AP does not need the mutual load horizontal information with STA, therefore is applicable to that all meet the STA of IEEE 802.11 standards;

(2) only mutual and spontaneous control STA access between AP of load horizontal information, need not AP service controller in addition controls, therefore obtained the progress that between AP, realizes dynamic load equilibrium technology, reached the purpose that can both realize load balancing when AP provides the wireless connections service for the various IEEE of meeting 802.11 standard STA, when having reduced networking and having used to the dependence of outside service controller, save the cost of networking, improved the flexibility of networking etc.

Description of drawings

Fig. 1 be in the utility model between AP load balancing use schematic diagram;

Fig. 2 is the handling process of campaign AP in the utility model;

Fig. 3 is the handling process of movable AP in the utility model;

Fig. 4 is a handling process of waiting for AP in the utility model.

Embodiment

In order to make those skilled in the art better understand the technical solution of the utility model, embodiment of the present utility model is further described in detail below in conjunction with drawings and embodiments.

As shown in Figure 1, for in the utility model between AP load balancing use schematic diagram, how much carry out the application of load balancing according to each AP access customer number amount, have three AP situation of (being AP1, AP2 and AP3) only is shown among the figure, by among the figure as can be known, AP1, AP2 and AP3 are connected with same Ethernet switch (SWITCH), and wherein each AP (AP1, AP2 and AP3) can be connected with many STA.The STA that supposes the AP1 access is minimum, and through the election between AP, inserting the few AP1 of STA becomes movable AP, and AP2 and AP3 then become wait AP.

At this moment, AP1 can continue to insert other STA, and AP2 and AP3 then refuse to insert other STA.When a new mobile radio terminal (STA1) added this specific wireless local area network (LAN), STA1 can only be linked into AP1.After STA1 finishes access AP1, will re-elect new movable AP between AP1, AP2 and the AP3.When the minimum AP quantity of load level (LOADING LEVEL) surpasses two, can elect unique movable AP according to the pre-configured priority size of each AP.Being implemented as follows during application:

The mutual horizontal message data message format of load (as shown in the table) between AP, wherein each field implication is:

Message field (MFLD)	Length
		Version	1
Order	1
		Message identification	2
Message length	2
		Subcommand	1
The load balancing strategy	1
		Load balancing group	2
The AP sign	8
		The AP mode of operation	1
The AP state	1
		The load level	4
Sequence number	2
		Extended service set identification length	1
Extended service set identification	Extended service set identification length

Version ", 1 byte long is pointed out the version of load balancing scheme;

" order ", 1 byte long is pointed out the specific function of message;

" message identification ", 2 byte longs help matching request and replying, and response message should copy the value that receives the message identification field to the response message identification field, ignores this field when receiving non-response message;

" message length ", 2 byte longs are pointed out to comprise the length of whole message: the field of version, order, message identification, message length field and back;

" subcommand ", 1 byte long is pointed out the horizontal message of load, subfunction;

" load balancing strategy ", 1 byte long is pointed out the strategy that load balancing adopts, as according to wireless terminal quantity with according to strategies such as data traffics;

" load balancing group ", 2 byte longs point out to participate in the sign of the specific AP of load balancing group;

" AP sign ", 8 byte longs are pointed out the sign of AP.The AP sign is made of two parts, and promptly AP priority connects basic service set identification (BSSID), and wherein AP priority takies two bytes;

" AP mode of operation ", 1 byte long is pointed out the mode of operation that AP is current, as is operated in IEEE802.11a, IEEE802.11b or IEEE802.11g etc.;

" AP state ", 1 byte long points out to issue the state of this message AP, as be in election process AP, wait for AP or movable AP etc.

" load level " is 4 bytes, points out to issue the present load horizontal size of this message AP;

" sequence number ", 2 byte longs are pointed out sequence number of message, the recipient can detect the information that repeats to receive at short notice, also is used for the recipient and prevents to receive the infomational message older than current information;

" extended service set identification length ", 1 byte long is pointed out the length of extended service set identification;

" extended service set identification " for the length of extended service set identification length field regulation, points out to issue this message AP extended service set identification (ESSID).

Because the mutual horizontal message of load does not also have the standard support at present between AP, so criteria of right and wrong interaction message used herein.

When initial,, be respectively for each AP creates four timers: monitoring load horizontal timing device, send the horizontal message timer of load, campaign AP continues timer and the unusual timer of detected activity AP, wherein,

Monitoring load horizontal timing device is used to set campaign AP and continues timing length more than or equal to the unusual timing length of detected activity AP.

Send the horizontal message timer of load, be used for setting the horizontal message timing length of transmission load and continue timing length, should guarantee in the campaign AP duration, to listen to the horizontal message of load of every other AP less than campaign AP.

Campaign AP continues timer, is used for set sending the horizontal message timing length of load less than the unusual timing length of detected activity AP, before should assurance activity the AP normal online and unusual timer of detected activity AP expires, receives the horizontal message of load of movable AP.

The unusual timer of detected activity AP is used to set monitoring load horizontal timing duration, should guarantee to reflect more exactly under different load balancing strategies real-time load level.

Be the different priority of each AP configuration.It is pointed out that and when the priority territory that detects two AP signs is identical, determine the priority size of AP by the BSSID territory of from the high byte to the low byte, comparing the AP sign successively.

When AP joins as shown in Figure 1 WLAN (wireless local area network), at first start the load level of monitoring load horizontal timing device periodic monitoring oneself, initiate the process of the new movable AP of election then.

As shown in Figure 2, be the handling process of campaign AP in the utility model, this step comprises:

Step 301, when beginning election AP refusal STA insert and start campaign AP and continue timer and send the horizontal message timer of load;

Step 302, before campaign AP continues timer and expires, execution in step 305 is by sending the horizontal message timer of load regularly sends load level from load horizontal information bulletin oneself to compartment system DS;

Step 306, reception are from the horizontal message of the load of other AP, and execution in step 307 is if the load level of this AP is less than the load level of oneself, or the load level of this AP equals oneself load level and the priority of this AP when being higher than oneself, then execution in step 308, and AP becomes wait AP

Step 309, wait AP should stop campaign AP to be continued timer and sends the horizontal message of load, timer, simultaneously the unusual timer of start detection activity AP;

If the load level of this AP of step 307, forwards the load level that step 302 and step 305 continue to send to compartment system DS the horizontal message of load, circular oneself to greater than the load level of oneself.In the step 302, expire if campaign AP continues timer, do not receive that yet then execution in step 303 makes AP become movable AP than the little message of own load level, execution in step 304 allows STA to insert, and continues to send the load level of load horizontal information bulletin oneself.

The processing of movable AP is the handling process of movable AP in the utility model as shown in Figure 3.

Step 401, movable AP send the load level of load horizontal information bulletin oneself.

Step 402, check oneself load level by monitoring load horizontal timing device.

Step 403, when the load level of oneself increases, execution in step 404 movable AP will initiate to elect the process of new movable AP again.

Step 405, when movable AP listens to the horizontal message of load of other AP, execution in step 406, if the load level of this AP is less than the load level of oneself, or the load level of this AP equals oneself load level and the priority of this AP when being higher than oneself, execution in step 407 movable AP become wait AP, refusal STA inserts, and stops sending the horizontal message timer of load, simultaneously the unusual timer of start detection activity AP.

The processing of wait AP is a handling process of waiting for AP in the utility model as shown in Figure 4.

Step 501, intercept the horizontal message of load of movable AP, if wait in the step 502 that AP does not receive the horizontal message of load of movable AP yet to after date at the unusual timer of detected activity AP, then execution in step 504 judgement activity AP have occurred unusually, and execution in step 510 waits for that AP will initiate to elect the process of new movable AP again.Otherwise AP is normally online in step 503 expression activity;

Step 505, wait AP are through horizontal message of the load that receives movable AP or self check, load level of oneself and the load level of movable AP are compared, in the step 506 when oneself load level during less than the load level of movable AP, or when oneself load level equaled the load level of movable AP and the priority of oneself and is higher than movable AP, execution in step 510 waited for that AP initiate the process of the new movable AP of election.

Step 507, when waiting for that AP listens to the horizontal message of load of other AP, relatively with the load level of the load level of this AP and movable AP;

Step 508, in when the load level of this AP during less than the load level of current active AP, or the load level of this AP priority that equals the load level of current active AP and this AP is when being higher than current active AP, execution in step 509 wait for AP with this AP as new movable AP.

Adopt method described in the utility model, only need mutual load horizontal information between AP, AP does not need the mutual load horizontal information with STA, therefore is applicable to that all meet the STA of IEEE 802.11 standards; The only mutual and spontaneous control STA access between AP of load horizontal information, need not AP service controller in addition controls, therefore obtain the progress that between AP, realizes dynamic load equilibrium technology, reached the purpose that can both realize load balancing when AP provides the wireless connections service for the various IEEE of meeting 802.11 standard STA.

The above is only own for preferred embodiment of the present utility model, is not to be used for limiting practical range of the present utility model; Every equivalence of doing according to the utility model changes and revises, and is all the utility model claim and contains.

Claims (3)

1. device of realizing that wireless network resource is shared is used for by a plurality of access points it is characterized in that for a plurality of wireless terminals provide the WLAN of wireless connections service, comprising:

Movable access point is elected module, is used for passing through between a plurality of access points the mode of the horizontal message of real-time, interactive load, and load level more separately and priority elect movable access point mutually, and described movable access point allows wireless terminal to insert; And

Wait for that access point is provided with module, be used for the movable access point that obtains according to described movable access point election module, all the other access points are made as the wait access point, described wait access point refusal wireless terminal inserts.

2. device according to claim 1 is characterized in that, described movable access point election module comprises:

Setup unit is used for setting the election time period when this access point refusal mobile radio terminal inserts;

Judging unit, judge that the current time is not in the election time period of setting, if send the horizontal message of load of this access point and receive the horizontal message of load of other access point, otherwise this access point is made as movable access point and allows mobile radio terminal to insert; And

The horizontal comparing unit of load, be used to carry out the load level relatively, if be compared the load level of the load level of access point less than this access point, the load level that perhaps is compared access point equals the load level of this access point and is compared access point priority to be higher than this access point, and this access point is made as to be waited for access point and stop to send the horizontal message of load.

3. device according to claim 2 is characterized in that, described device also comprises:

Regularly sending module is used for movable access point initiatively to waiting for that access point regularly sends the load level of the horizontal information bulletin of load oneself;

Initiate the new movable access point module of election, be used for the load level in activity access point monitors oneself, when the load level of movable access point increased, movable access point was initiated the process of the new movable access point of election;

Judge module, be used for receiving the horizontal message of load of other access point at movable access point, when the load level that has a certain wait access point is lower than the load level of movable access point, or the load level that the has a certain wait access point priority that equals the load level of movable access point and these points to be accessed is made as the wait access point with movable access point when being higher than movable access point.

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