CN103491528A

CN103491528A - Table entry processing method and device

Info

Publication number: CN103491528A
Application number: CN201310430683.XA
Authority: CN
Inventors: 赵新星
Original assignee: Fujian Star Net Communication Co Ltd
Current assignee: Ruijie Networks Co Ltd
Priority date: 2013-09-18
Filing date: 2013-09-18
Publication date: 2014-01-01
Anticipated expiration: 2033-09-18
Also published as: CN103491528B

Abstract

The invention provides a table entry processing method and device. The table entry processing method comprises the steps that after the fact that a site exits a first access point related to the site is confirmed, a filtering table entry corresponding to the site is deleted, and the lease of a bound table entry corresponding to the site is shortened from first duration to second duration; when the site is related to a second access point again within the second duration and if the site does not initiate a DHCP request again after the site is related to the second access point again, the lease of the bound table entry corresponding to the site is recovered to the first duration, the value, related to an access point field, in the bound table entry corresponding to the site is updated to be an address of the second access point, and a filtering table entry corresponding to the site is generated according to the updated bound table entry. According to the table entry processing method and device, the filtering table entry corresponding to an STA can be timely generated after the STA moves, and the fact that the STA can conduct communication normally after being related to a novel AP again is guaranteed.

Description

Table entry processing method and equipment

Technical field

The present invention relates to wireless local area network technology, relate in particular to a kind of table entry processing method and equipment, belong to communication technical field.

Background technology

WLAN (wireless local area network) (Wireless Local Area Networks; Hereinafter to be referred as: be WLAN) by wireless communication technology, that computer equipment is interconnected, the network system of resource-sharing can be communicated by letter mutually and realize to formation.Access point (Access Point; Hereinafter to be referred as: AP), wireless terminal is accessed the access point of cable network, is equivalent to the bridge of wireless terminal and wired network communication.Access controller (Access Controller; Hereinafter to be referred as: AC), AC is connected with AP by cable network, for managing concentratedly, controls AP.

Website (Station; Hereinafter to be referred as: STA) be generally wireless terminal in WLAN, STA can be the computer that wireless network card is housed, and Wireless Fidelity (Wireless Fidelity is also arranged; Hereinafter to be referred as: WIFI) smart mobile phone of function or panel computer etc.STA can be fixing, can be also mobile, but is all in most cases mobile, can optionally move in and out WLAN.

DHCP (Dynamic Host Configure Protocol; Hereinafter to be referred as: DHCP) be the procotol of a local area network (LAN), Dynamic Host Configuration Protocol server (DHCP Server) is undertaken automatically distributing Internet protocol (Internet Protocol for STA alternately by DHCP message and STA; Hereinafter to be referred as: IP) address.

It is the security feature of DHCP that DHCP is monitored (DHCP Snooping) technology, DHCPSnooping is by the DHCP message between monitoring STA and Dynamic Host Configuration Protocol server, set up and maintaining DHCP Snooping binding list item, and then generate corresponding hardware forward filtering list item, when E-Packeting, utilize filtering meter item to be checked the IP message, filter invalid packet, realize network security capability.DHCP Snooping binding list item comprises media access control (Media Access Control; Hereinafter to be referred as: MAC) address, VLAN (Virtual Local Area Network; Hereinafter to be referred as: VLAN) number, lease time, IP address and/or incoming end slogan etc.

The networking mode of the thin AP of thin AP network using cable network+AC+, AP is as simple WAP (wireless access point), do not possess management and control function, and by all AP of AC unified management, to specifying AP to issue configuration without configuration separately on each AP.Adopt control and configuration (the Control And Provisioning of Wireless Access Points of WAP (wireless access point) between AC and AP; Hereinafter to be referred as: CAPWAP) agreement is set up control channel and data channel, and wherein control channel sends event notification for configuration AP and AP on AC to AC; Data channel is for sending datagram between AP and AC.

The data communication of thin AP network mainly is divided into concentrates forward mode and local forward mode.

Concentrate forward mode: after AP receives 802.11 frames, convert 802.3 frames in this locality, then encapsulate and be transmitted to AC by CAPWAP, namely all messages are concentrated and are processed and forward by AC.

Local forward mode: after AP receives 802.11 frames, directly in this locality, process and forward, process without issue AC by CAPWAP tunnel, message is directly processed and is forwarded by AP.

In prior art, by dispose respectively DHCP Snooping on AP and AC, the maintenance of binding list item and filtering meter item only depends on the message interaction of DHCP, there is following problem in this scheme: under local forward mode, list item generates at AP, concentrate list item under forward mode to generate at AC, these list item information can't be shared mutually.When STA is linked into WLAN first, STA can trigger the DHCP application process, and list item can normally generate on AP or AC, then can start proper communication.But; under WLAN, STA often can be moved between different AP between different AP or under different AC under identical AC; if after mobile still in original local area network (LAN) do not need to initiate new DHCP application; this just causes new associated AP to have no idea to generate filtering meter item, and STA again just can't proper communication after associated new AP.

Summary of the invention

The invention provides a kind of table entry processing method and equipment, in order to generate in time filtering meter item corresponding to STA after moving at STA, guarantee that STA again can proper communication after associated new AP.

First aspect provides a kind of table entry processing method, comprising:

After determining that website exits the first access point of described website association, delete the filtering meter item that described website is corresponding, by described website, the lease of corresponding binding list item is reduced to the second duration by the first duration;

When described website again is associated with the second access point in described the second duration, if described website is not again initiated the DHCP application after again being associated with described the second access point, by described website, the lease of corresponding binding list item reverts to described the first duration, and by described website in corresponding binding list item the value of association access point address field be updated to the address of described the second access point, generate according to the binding list item after upgrading the filtering meter item that described website is corresponding.

Second aspect provides a kind of list item processing unit, is arranged in the first access point and realizes, described the first access point adopts local forward mode, and described device comprises:

Whether determination module, exit described the first access point for the website of determining associated described the first access point;

Removing module, for determining at described determination module after described website exits described the first access point, delete the filtering meter item that described website is corresponding;

Announcement module, for determining at described determination module after described website exits described the first access point, notify the described website of access controller that described the first access point is corresponding to exit described the first access point, so that the lease of access controller corresponding binding list item by described website corresponding to described the first access point is reduced to the second duration by the first duration, and the lease of announcing other access controller corresponding binding list item by described website except access controller corresponding to described the first access point in same WLAN (wireless local area network) is reduced to the second duration by the first duration, wherein, the binding list item corresponding to described website of described other access controller storages is that the access controller corresponding by described the first access point sends.

The third aspect provides a kind of list item processing unit, is arranged in the access controller that the first access point is corresponding and realizes, described the first access point adopts local forward mode, and described device comprises:

Receiver module, exited the message of described the first access point for receiving described website that described the first access point announces after the website of determining associated described the first access point exits described the first access point;

Update module, for receive the message that described website exited described the first access point at described receiver module after, by described website, the lease of corresponding binding list item is reduced to the second duration by the first duration;

Announcement module, after at described receiver module, receiving the message that described website exited described the first access point, the lease of announcing other access controller corresponding binding list item by described website except access controller corresponding to described the first access point in same WLAN (wireless local area network) is reduced to the second duration by the first duration; Wherein, the binding list item corresponding to described website of described other access controller storages is that the access controller corresponding by described the first access point sends.

Fourth aspect provides a kind of list item processing unit, is arranged in the first access point and realizes, described the first access point adopts concentrates forward mode, and described device comprises:

Announcement module, for determining at described determination module after described website exits described the first access point, notify the described website of access controller that described the first access point is corresponding to exit described the first access point, so that access controller corresponding to described the first access point deleted the filtering meter item that described website is corresponding, by described website, the lease of corresponding binding list item is reduced to the second duration by the first duration, and the lease of announcing other access controller corresponding binding list item by described website except access controller corresponding to described the first access point in same WLAN (wireless local area network) is reduced to the second duration by the first duration, wherein, the binding list item corresponding to described website of described other access controller storages is that the access controller corresponding by described the first access point sends.

The 5th aspect provides a kind of list item processing unit, is arranged in the access controller that the first access point is corresponding and realizes, described the first access point adopts concentrates forward mode, and described device comprises:

Removing module, for receive the message that described website exited described the first access point at described receiver module after, delete the filtering meter item that described website is corresponding;

The 6th aspect provides a kind of list item processing unit, is arranged in the second access point and realizes, described the second access point adopts local forward mode, and described device comprises:

Notification module, while being used for again being associated with described the second access point in the second duration after the website of associated the first access point is exiting described the first access point, if described website is not again initiated the DHCP application after again being associated with described the second access point, notify the described website of access controller that described the second access point is corresponding to be associated with described the second access point and again not initiated the DHCP application, so that the lease of access controller corresponding binding list item by described website corresponding to described the second access point reverts to the first duration, by described website, in corresponding binding list item, the value of association access point address field is updated to the address of described the second access point, and the lease of announcing other access controller corresponding binding list item by described website except access controller corresponding to described the second access point in same WLAN (wireless local area network) reverts to described the first duration, by described website, in corresponding binding list item, the value of association access point address field is updated to the address of described the second access point, the lease of the binding list item that wherein, described website is corresponding is that the access controller that described the first access point is corresponding is reduced to described the second duration by described the first duration after described website exits described the first access point,

Receiver module, for the binding list item after the renewal that receives the access controller transmission that described the second access point is corresponding;

Generation module, generate for the binding list item after the described renewal received according to described receiver module the filtering meter item that described website is corresponding.

The 7th aspect provides a kind of list item processing unit, is arranged in the access controller that the second access point is corresponding and realizes, described the second access point adopts local forward mode, and described device comprises:

Receiver module, for receiving described the second access point when the website of determining associated the first access point exits described the first access point and again be associated with described the second access point and again do not initiate the DHCP application in the second duration, the described website of notice has been associated with described the second access point and has not again initiated the message of DHCP application;

Update module, for after receiving described website at described receiver module and being associated with described the second access point and again not initiated the message of DHCP application, by described website, the lease of corresponding binding list item reverts to the first duration, and by described website, in corresponding binding list item, the value of association access point address field is updated to the address of described the second access point; The lease of the binding list item that wherein, described website is corresponding is that the access controller that described the first access point is corresponding is reduced to described the second duration by described the first duration after described website exits described the first access point;

Announcement module, for after receiving described website at described receiver module and being associated with described the second access point and again not initiated the message of DHCP application, the lease of announcing other access controller corresponding binding list item by described website except access controller corresponding to described the second access point in same WLAN (wireless local area network) reverts to described the first duration, and by described website, in corresponding binding list item, the value of association access point address field is updated to the address of described the second access point;

Sending module, send to described the second access point for the binding list item after described update module is upgraded, so that described the second access point generates according to the binding list item after described renewal the filtering meter item that described website is corresponding.

Eight aspect provides a kind of list item processing unit, is arranged in the access controller that the second access point is corresponding and realizes, described the second access point adopts concentrates forward mode, and described device comprises:

Generation module, generate for the binding list item after upgrading according to described update module the filtering meter item that described website is corresponding.

Table entry processing method provided by the invention and equipment, after definite STA exits an AP of this STA association, delete the filtering meter item that above-mentioned STA is corresponding, and the lease of corresponding binding list item is reduced to the second duration by the first duration by above-mentioned STA; When again being associated with the 2nd AP as above-mentioned STA and again not initiating the DHCP application in the second duration, by above-mentioned STA, the lease of corresponding binding list item reverts to the first duration, and by above-mentioned STA in corresponding binding list item the value of associated AP address field be updated to the address of the 2nd AP, generate according to the binding list item after upgrading the filtering meter item that above-mentioned STA is corresponding.As seen from the above analysis, technical solution of the present invention can be upgraded the binding list item that this STA is corresponding after STA moves, and the binding list item based on after upgrading generates filtering meter item corresponding to STA, and then guarantees that STA again can proper communication after associated the 2nd AP.

The accompanying drawing explanation

The flow chart that Fig. 1 is an embodiment of table entry processing method of the present invention;

The schematic diagram that Fig. 2 is an embodiment of application scenarios of the present invention;

The flow chart that Fig. 3 is another embodiment of table entry processing method of the present invention;

Fig. 4 is that the present invention generates binding list item that STA is corresponding and the flow chart of an embodiment of filtering meter item;

The structural representation that Fig. 5 is an embodiment of list item processing unit of the present invention;

The structural representation that Fig. 6 is another embodiment of list item processing unit of the present invention;

The structural representation that Fig. 7 is the another embodiment of list item processing unit of the present invention;

The structural representation that Fig. 8 is the another embodiment of list item processing unit of the present invention;

The structural representation that Fig. 9 is the another embodiment of list item processing unit of the present invention;

The structural representation that Figure 10 is the another embodiment of list item processing unit of the present invention;

The structural representation that Figure 11 is the another embodiment of list item processing unit of the present invention.

Embodiment

The flow chart that Fig. 1 is an embodiment of table entry processing method of the present invention, as shown in Figure 1, this table entry processing method can comprise:

Step 101, after determining that STA exits an AP of this STA association, delete the filtering meter item that above-mentioned STA is corresponding, and by above-mentioned STA, the lease of corresponding binding list item is reduced to the second duration by the first duration.

Wherein, the second duration is less than the first duration, the first duration and the second duration can be when specific implementation set up on their own according to the performance of AC and system requirements etc., the present embodiment is not construed as limiting the value of the first duration and the second duration, for instance, the first duration can be 10 seconds, and the second duration can be 5 seconds.

Particularly, determine that the AP that STA exits this STA association can be: an AP of STA association determines that above-mentioned STA exits an AP;

Optionally, delete the filtering meter item that above-mentioned STA is corresponding, by above-mentioned STA, the lease of corresponding binding list item is reduced to the second duration by the first duration and can comprises:

If an AP adopts local forward mode, an AP deletes the filtering meter item that above-mentioned STA is corresponding, and notifies the above-mentioned STA of AC that an AP is corresponding to exit an AP; AC corresponding to the one AP is after knowing that above-mentioned STA has exited an AP, by above-mentioned STA, the lease of corresponding binding list item is reduced to the second duration by the first duration, and the lease of announcing other AC corresponding binding list item by above-mentioned STA except AC corresponding to an AP in same WLAN is reduced to the second duration by the first duration; Wherein, the binding list item corresponding to above-mentioned STA of described other AC storages except AC corresponding to an AP is that the AC corresponding by a described AP sends;

Concentrate forward mode if an AP adopts, an AP notifies the above-mentioned STA of AC that an AP is corresponding to exit an AP; AC corresponding to the one AP is after knowing that above-mentioned STA has exited an AP, delete the filtering meter item that above-mentioned STA is corresponding, by above-mentioned STA, the lease of corresponding binding list item is reduced to the second duration by the first duration, and the lease of announcing other AC corresponding binding list item by above-mentioned STA except AC corresponding to an AP in same WLAN is reduced to the second duration by the first duration.

Further, after above-mentioned STA access the one AP, can generate binding list item and filtering meter item corresponding to above-mentioned STA that above-mentioned STA is corresponding.Wherein, after above-mentioned STA access the one AP, the process that generates the filtering meter item that binding list item that above-mentioned STA is corresponding and above-mentioned STA are corresponding can comprise:

If an AP adopts local forward mode, the process that DHCP Snooping spies upon DHCP occurs on AP, AP generates the binding list item of above-mentioned STA according to the DHCP message in dhcp process, then according to above-mentioned STA, corresponding binding list item forms the hardware filtering list item in this locality, after generating the binding list item that STA is corresponding, also by STA, corresponding binding list item sends to AC corresponding to an AP, AC corresponding to the one AP stores the binding list item that above-mentioned STA is corresponding, and send acknowledgment message to an AP, the one AP receives the binding list item deletion corresponding to above-mentioned STA that this locality can be generated after the acknowledgement message of the AC transmission that an AP is corresponding, further, the AC that the one AP is corresponding also can send to other AC except AC corresponding to an AP in same WLAN by the binding list item of the above-mentioned STA of storage, so that other AC shares and backs up the binding list item that above-mentioned STA is corresponding, other AC is stored after receiving the binding list item that above-mentioned STA is corresponding,

If adopting, an AP concentrates forward mode, the process that DHCP Snooping spies upon DHCP occurs on AC, after an AP notifies the above-mentioned STA of AC that an AP is corresponding to be associated with an AP, AC corresponding to the one AP generates the binding list item that above-mentioned STA is corresponding, and according to above-mentioned STA, corresponding binding list item generates the filtering meter item that above-mentioned STA is corresponding afterwards; Further, the AC that the one AP is corresponding also can send to other AC except AC corresponding to an AP in same WLAN by the binding list item of the above-mentioned STA of storage, so that other AC shares and backs up the binding list item that above-mentioned STA is corresponding, other AC is stored after receiving the binding list item that above-mentioned STA is corresponding.

In an embodiment, each AC can store binding list item corresponding to STA under different conditions by formal table and backup sheet.The AC that the one AP is corresponding can above-mentioned STA is corresponding binding list item store in its formal table, and the binding list item that other AC can be corresponding by above-mentioned STA stores in backup sheet separately.

Step 102, when above-mentioned STA again is associated with the 2nd AP in the second duration, if above-mentioned STA does not again initiate the DHCP application after again being associated with the 2nd AP, by above-mentioned STA, the lease of corresponding binding list item reverts to the first duration, and by above-mentioned STA in corresponding binding list item the value of associated AP address field be updated to the address of the 2nd AP, generate filtering meter item corresponding to STA according to the binding list item after upgrading.

After the lease of the binding list item that above-mentioned STA is corresponding is reduced to the second duration by the first duration, determine whether above-mentioned STA again is associated with the 2nd AP in the second duration; Again be associated with the 2nd AP if determine above-mentioned STA in the second duration, continue to determine whether above-mentioned STA again initiates the DHCP application after again being associated with the 2nd AP.

In a kind of implementation of the present embodiment, the AC that the 2nd AP is corresponding with an AP is identical.In this implementation, the 2nd AP can be different AP from an AP, and this means that STA moves between the different AP of identical AC; In addition, the 2nd AP can be also identical AP with an AP, and this means that STA, after an AP who exits this STA association originally, is associated with an AP again.

In the another kind of implementation of the present embodiment, the AC that the 2nd AP is corresponding from an AP is different, and certainly, in this implementation, the 2nd AP and an AP are different AP, and this expression STA moves between the different AP of different AC;

In this implementation, in step 102, determine that above-mentioned STA is in the second duration after associated the 2nd AP, the backup sheet of the binding list item that the AC that the 2nd AP is corresponding can also be corresponding by above-mentioned STA corresponding AC from the 2nd AP moves into the formal table of the AC that the 2nd AP is corresponding.

Based on above-mentioned, determine that the process whether above-mentioned STA again is associated with the 2nd AP in the second duration can comprise: after STA is associated with the 2nd AP, the 2nd AP can perceive this event, and the 2nd AP perceives after STA is associated with the 2nd AP and can notify the above-mentioned STA of AC that the 2nd AP is corresponding to be associated with the 2nd AP.If the AC that the AC that the 2nd AP is corresponding is corresponding with an AP is same AC, after this AC receives the notice of the 2nd AP, the moment that meeting is exited an AP according to STA judges with the moment that STA is associated with the 2nd AP whether above-mentioned STA is associated with the 2nd AP within the second duration, and judged result is informed to the 2nd AP.If the AC AC corresponding from an AP that the 2nd AP is corresponding is different AC, after AC corresponding to the 2nd AP receives the notice of the 2nd AP, can be by the data sharing channel between the AC corresponding with an AP, STA is associated with to AC corresponding to message informing the one AP of the 2nd AP, the moment that AC corresponding to such AP can exit an AP according to STA judges with the moment that STA is associated with the 2nd AP whether above-mentioned STA is associated with the 2nd AP within the second duration, and judged result is informed to AC corresponding to the 2nd AP, then the AC that the 2nd AP is corresponding can inform judged result the 2nd AP.

Optionally, for the 2nd AP, the corresponding AC AC corresponding from an AP is the situation of different AC, after AC corresponding to the 2nd AP receives the notice of the 2nd AP, also can be by the data sharing channel between the AC corresponding with an AP, obtain from AC corresponding to an AP moment that STA exits an AP, the moment that AC corresponding to such the 2nd AP can exit an AP according to STA judges that with the moment that STA is associated with the 2nd AP whether above-mentioned STA is associated with the 2nd AP within the second duration, then informs judged result the 2nd AP.

Based on above-mentioned, determine that the process whether above-mentioned STA again initiates DHCP application after again being associated with the 2nd AP can comprise: if the 2nd AP adopts local forward mode,, after the 2nd AP receives the DHCP request message of above-mentioned STA transmission, the 2nd AP can determine that above-mentioned STA initiates the DHCP application again; If adopting, the 2nd AP concentrates forward mode, after the 2nd AP receives the DHCP request message of above-mentioned STA transmission, this DHCP request message is sent to AC corresponding to the 2nd AP, after AC corresponding to the 2nd AP receives this DHCP request message, can determine that STA initiates the DHCP application again.

When definite above-mentioned STA again is associated with the 2nd AP in the second duration, but again initiate DHCP application,, in order to guarantee that STA can proper communication after access the 2nd AP, need to generate filtering meter item corresponding to STA.In the present embodiment, binding list item corresponding to this STA generated when accessing an AP based on above-mentioned STA regenerates the filtering meter item that above-mentioned STA is corresponding, specifically after above-mentioned STA associated the 2nd AP again, to above-mentioned STA, corresponding binding list item is upgraded, and generates according to the binding list item after upgrading the filtering meter item that above-mentioned STA is corresponding.Wherein, the process of upgrading the binding list item that above-mentioned STA is corresponding comprises: by above-mentioned STA, the lease of corresponding binding list item reverts to the first duration again, and by above-mentioned STA in corresponding binding list item the value of association access point address field be updated to the address of the 2nd AP.

Optionally, by above-mentioned STA, the lease of corresponding binding list item reverts to the first duration, and by above-mentioned STA in corresponding binding list item the value of association access point address field be updated to the address of the 2nd AP, comprising:

The 2nd AP notifies the above-mentioned STA of AC that the 2nd AP is corresponding to be associated with the 2nd AP and again not initiated the DHCP application; After AC corresponding to the 2nd AP knows that above-mentioned STA has been associated with the 2nd AP and has not again initiated the DHCP application, by above-mentioned STA, the lease of corresponding binding list item reverts to the first duration, by above-mentioned STA, in corresponding binding list item, the value of association access point address field is updated to the address of the 2nd AP, and also by above-mentioned STA, the lease of corresponding binding list item reverts to the first duration to announce in same WALN other AC except AC corresponding to the 2nd AP, by above-mentioned STA, in corresponding binding list item, the value of association access point address field is updated to the address of the 2nd AP.

Binding list item based on after above-mentioned renewal generates the filtering meter item that above-mentioned STA is corresponding and can comprise:

If the 2nd AP adopts local forward mode, the AC that the 2nd AP is corresponding sends to the 2nd AP by the binding list item after upgrading; The 2nd AP generates according to the binding list item after described renewal the filtering meter item that above-mentioned STA is corresponding;

Concentrate forward mode if described the 2nd AP adopts, the AC that the 2nd AP is corresponding, after knowing that above-mentioned STA has been associated with the 2nd AP and has not again initiated the DHCP application, generates according to the binding list item after described renewal the filtering meter item that above-mentioned STA is corresponding.

In an optional execution mode, the AC that the AC that the 2nd AP is corresponding is corresponding with an AP is identical.Based on this, the binding list item that above-mentioned STA is corresponding is kept in the formal table of the AC that the 2nd AP is corresponding, therefore, before AC corresponding to the 2nd AP upgrades the filtering meter item that above-mentioned STA is corresponding, the lease of AC corresponding binding list item by above-mentioned STA that the 2nd AP is corresponding reverts to described the first duration, before in corresponding binding list item, the value of association access point address field is updated to the address of the 2nd AP by above-mentioned STA, do not need the binding list item that above-mentioned STA is corresponding to move to from backup sheet in formal table.

In an optional execution mode, the AC that the AC that the 2nd AP is corresponding is corresponding with an AP is different.The lease of AC corresponding binding list item by above-mentioned STA that the 2nd AP is corresponding reverts to described the first duration, before by above-mentioned STA, in corresponding binding list item, the value of association access point address field is updated to the address of the 2nd AP, also comprises:

The backup sheet of binding list item corresponding AC from the 2nd AP that the AC that the 2nd AP is corresponding is corresponding by above-mentioned STA, move in the formal table of the AC that the 2nd AP is corresponding; In addition, also need to announce the formal table of binding list item corresponding AC from an AP that AC that an AP is corresponding is corresponding by above-mentioned STA and move on in the backup sheet of the AC that an AP is corresponding.

Wherein, only, when associated certain AP of STA, the binding list item that this STA is corresponding just can store in the formal table of the AC that associated AP is corresponding, and other AC is used backup sheet to store the binding list item that this STA is corresponding.

In the present embodiment, the critical field of the binding list item that STA is corresponding can be as shown in table 1.

Table 1

In table 1, the associated AP address field is new field of the present invention with associated AC address field, according to the value of these two fields, can know fast the AP of STA association, and the corresponding AC of the AP of STA association.Particularly, the value of associated AP address field can be the MAC Address of the AP of STA association, and the value of associated AC address field can be the MAC Address of the corresponding AC of AP of STA association.

The critical field of the filtering meter item that STA is corresponding can be as shown in table 2.

Table 2

In above-described embodiment, after determining that STA exits an AP of this STA association, delete the filtering meter item that above-mentioned STA is corresponding, and the lease of corresponding binding list item is reduced to the second duration by the first duration by above-mentioned STA; When again being associated with the 2nd AP as above-mentioned STA and again not initiating the DHCP application in the second duration, by above-mentioned STA, the lease of corresponding binding list item reverts to the first duration, and by above-mentioned STA in corresponding binding list item the value of associated AP address field be updated to the address of the 2nd AP, generate according to the binding list item after upgrading the filtering meter item that above-mentioned STA is corresponding.As can be seen here, the present embodiment is after STA moves, and by upgrading the binding list item that this STA is corresponding, and the binding list item based on after upgrading regenerates the filtering meter item that STA is corresponding, and then guarantees that STA again can proper communication after associated the 2nd AP.

Wherein, emphasis embodiment illustrated in fig. 1 has been described STA and again be associated with the situation of the 2nd AP within the second duration, and on basis embodiment illustrated in fig. 1, described table entry processing method also comprises:

If above-mentioned STA again is not associated with the 2nd AP within the second duration, delete binding list item corresponding to above-mentioned STA the formal table of AC corresponding AC from an AP that an AP is corresponding, and announce other AC except AC corresponding to an AP in same WLAN and delete binding list item corresponding to above-mentioned STA from backup sheet separately.Like this, STA is if really leave, binding list item corresponding to this STA can residual long time yet, thereby avoid the very long binding list item that causes of lease residual for a long time, the list item capacity of the AC that the original associated AP of STA is corresponding is not easy to reach the upper limit, also just can not cause because the list item capacity reaches the upper limit after new STA access normally generating new list item and then can't proper communication.

Based on above-mentioned, above-mentioned STA may again be associated with the 2nd AP after the second duration.Owing on any AC in same WLAN now, all not having the binding list item that above-mentioned STA is corresponding, there do not is the filtering meter item that above-mentioned STA is corresponding on AC corresponding to the 2nd AP or the 2nd AP yet, in order to guarantee that above-mentioned STA again can proper communication after associated the 2nd AP,, when above-mentioned STA again is associated with the 2nd AP after the second duration, can constructs DHCP and deny (DHCP Negative Acknowledgment; Hereinafter to be referred as: DHCP NAK) message sends to above-mentioned STA, to force above-mentioned STA again to initiate the DHCP application, and, after above-mentioned STA initiates the DHCP application again, according to the DHCP message in the DHCP application process, generate binding list item and the filtering meter item that above-mentioned STA is corresponding.

Optionally, carry out the difference of data communication mode according to the 2nd AP, above-mentioned structure DHCP NAK message sends to above-mentioned STA, to force above-mentioned STA again to initiate the DHCP application, and, after above-mentioned STA initiates DHCP application again, according to the DHCP message in the DHCP application process, generate binding list item that above-mentioned STA is corresponding and the process of filtering meter item can comprise:

If the 2nd AP adopts local forward mode, the 2nd AP structure DHCP NAK message sends to above-mentioned STA, to force above-mentioned STA again to initiate the DHCP application, and after above-mentioned STA initiates the DHCP application again, generate according to the DHCP message in the DHCP application process binding list item that above-mentioned STA is corresponding, then generate according to binding list item corresponding to above-mentioned STA generated the filtering meter item that above-mentioned STA is corresponding, and corresponding binding list item sends to AC corresponding to the 2nd AP by above-mentioned STA, so that AC corresponding to the 2nd AP by above-mentioned STA, corresponding binding list item is saved in the formal table of the AC that the 2nd AP is corresponding, and after sending to the AC that the 2nd AP is corresponding, the binding list item that above-mentioned STA is corresponding deletes binding list item corresponding to above-mentioned STA, accordingly, the binding list item that the above-mentioned STA that AC reception the 2nd AP that the 2nd AP is corresponding sends is corresponding also stores the binding list item of reception in the formal table of oneself,

If adopting, the 2nd AP concentrates forward mode, the 2nd AP notifies the above-mentioned STA of AC that the 2nd AP is corresponding to be associated with the 2nd AP after the second duration, the AC that the 2nd AP is corresponding is after knowing that above-mentioned STA is to be associated with the 2nd AP after the second duration, structure DHCP NAK message sends to above-mentioned STA, to force above-mentioned STA again to initiate the DHCP application, and after above-mentioned STA initiates the DHCP application again, generate according to the DHCP message in the DHCP application process binding list item that above-mentioned STA is corresponding, then generate according to binding list item corresponding to above-mentioned STA generated the filtering meter item that above-mentioned STA is corresponding, and corresponding binding list item is saved in the formal table of the AC that the 2nd AP is corresponding by above-mentioned STA.

In said process, optionally, AC corresponding to the 2nd AP can send acknowledgment message to the 2nd AP after receiving the binding list item that above-mentioned STA that the 2nd AP sends is corresponding, so that the 2nd AP is known, successfully the binding list item of above-mentioned STA sent to AC corresponding to the 2nd AP.

Further, in the situation that above-mentioned STA again is associated with the 2nd AP after the second duration, after generating the binding list item and filtering meter item that above-mentioned STA is corresponding, described method can also comprise:

The AC that the 2nd AP is corresponding sends to other AC except AC corresponding to the 2nd AP in same WLAN by binding list item corresponding to above-mentioned STA generated, so that other AC is by above-mentioned STA, corresponding binding list item stores in backup sheet separately, thereby realize sharing and backup of binding list item that above-mentioned STA is corresponding, for STA filtering meter item corresponding to rear generation that again be moved provides condition.

Further, on basis embodiment illustrated in fig. 1, described method also comprises: above-mentioned STA again is associated with the 2nd AP within the second duration, and above-mentioned STA again initiates the situation of DHCP application after again being associated with the 2nd AP, in this case, can, after above-mentioned STA initiates the DHCP application again, according to the DHCP message in the DHCP application process, generate binding list item and the filtering meter item that above-mentioned STA is corresponding.

Wherein, again be associated with the 2nd AP within the second duration at STA, and in the situation that again initiate corresponding binding list item and the filtering meter item process of DHCP application generation STA after again being associated with the 2nd AP, with in the situation that STA again is associated with the 2nd AP after the second duration, to generate the binding list item that STA is corresponding identical with the filtering meter item process, do not repeat them here, can be referring to the description of front.

The table entry processing method that Fig. 1 of the present invention provides can be applied in the application scenarios shown in Fig. 2 of the present invention, the schematic diagram that Fig. 2 is an embodiment of application scenarios of the present invention.In Fig. 2, AP is for STA access, and AP is by the AC unified management, carries out data by data sharing channel between AC and AC synchronous, and Dynamic Host Configuration Protocol server disposed in the AC first line of a couplet.As shown in Figure 2, STA can move between the different AP of identical AC, as shown in arrow 1, also can between the different AP of different AC, move, as shown in arrow 2 or arrow 3.

The flow chart that Fig. 3 is another embodiment of table entry processing method of the present invention, the method that the present embodiment provides can be applied in the application scenarios shown in Fig. 2 of the present invention, and as shown in Figure 3, this table entry processing method can comprise:

Step 301, an AP of STA association determines that this STA exits an AP.

In the present embodiment, after STA exits an associated AP, an AP can perceive STA and exit.

Next, if an AP adopts local forward mode, perform step 302; Concentrate forward mode if an AP adopts, perform step 304.

Step 302, an AP deletes the filtering meter item that above-mentioned STA is corresponding, continues execution step 303.

Step 303, an AP notifies the above-mentioned STA of AC that an AP is corresponding to exit an AP, continues execution step 305.

Step 304, an AP notify the above-mentioned STA of AC that an AP is corresponding to exit an AP, and AC corresponding to an AP deletes the filtering meter item that above-mentioned STA is corresponding, and continue execution step 305.

Step 305, the lease of AC corresponding binding list item by above-mentioned STA that the one AP is corresponding is reduced to the second duration by the first duration, and also the lease of corresponding binding list item is reduced to the second duration by the first duration by above-mentioned STA to announce interior other AC of same WLAN, and continue execution step 306.

Wherein, the present embodiment is announced other AC mode that also lease of corresponding binding list item is reduced to the second duration by the first duration by above-mentioned STA in same WLAN to AC corresponding to an AP and is not done and limit.

Further, if STA again is not associated with any AP within above-mentioned the second duration, the AC that an AP is corresponding can delete the binding list item that above-mentioned STA is corresponding, and other AC binding list item that above-mentioned STA is corresponding of announcing in same WLAN is deleted from the backup sheet of preserving separately.Like this, STA is if really leave, and the binding list item that this STA is corresponding can residual long time yet.

Step 306, judge whether associated the 2nd AP in the second duration of above-mentioned STA.If so, perform step 307; If not, STA associated the 2nd AP after through the second duration, perform step 314.

Particularly, after STA is associated with the 2nd AP, the 2nd AP can perceive this event, and then the 2nd AP can notify the above-mentioned STA of AC that the 2nd AP is corresponding to be associated with the 2nd AP.If the AC that the AC that the 2nd AP is corresponding is corresponding with an AP is same AC, after this AC receives the notice of the 2nd AP, the moment that meeting is exited an AP according to STA judges with the moment that STA is associated with the 2nd AP whether above-mentioned STA is associated with the 2nd AP within the second duration, and judged result is informed to the 2nd AP.If the AC AC corresponding from an AP that the 2nd AP is corresponding is different AC, after AC corresponding to the 2nd AP receives the notice of the 2nd AP, can be by the data sharing channel between the AC corresponding with an AP, STA is associated with to AC corresponding to message informing the one AP of the 2nd AP, the moment that AC corresponding to such AP can exit an AP according to STA judges with the moment that STA is associated with the 2nd AP whether above-mentioned STA is associated with the 2nd AP within the second duration, and judged result is informed to AC corresponding to the 2nd AP, then the AC that the 2nd AP is corresponding can inform judged result the 2nd AP.

Perhaps, for the 2nd AP, the corresponding AC AC corresponding from an AP is the situation of different AC, after AC corresponding to the 2nd AP receives the notice of the 2nd AP, also can be by the data sharing channel between the AC corresponding with an AP, obtain from AC corresponding to an AP moment that STA exits an AP, the moment that AC corresponding to such the 2nd AP can exit an AP according to STA judges that with the moment that STA is associated with the 2nd AP whether above-mentioned STA is associated with the 2nd AP within the second duration, then informs judged result the 2nd AP.

Step 307, judge an AP and the whether corresponding identical AC of the 2nd AP.If so, perform step 309, if not, the AP AC corresponding different with the 2nd AP, perform step 308.

Particularly, after AC corresponding to the 2nd AP knows that STA is associated with the 2nd AP, search the list item corresponding with the MAC Address of this STA in the formal table that the AC that the 2nd AP is corresponding can preserve at self, if find, the AC that the 2nd AP is corresponding can determine the AC that an AP is corresponding identical with the 2nd AP, and this STA moves between the different AP of identical AC; And if do not find the list item corresponding with the MAC Address of this STA in the formal table that AC corresponding to the 2nd AP preserves at self, but found the list item corresponding with the MAC Address of this STA in the backup sheet of preserving at self, the AC that the 2nd AP is corresponding can determine the AC that an AP is corresponding different with the 2nd AP, and this STA moves between the different AP of different AC.

In this step, an AP is during with the corresponding identical AC of the 2nd AP, and the 2nd AP can be different AP from an AP, and this means that STA moves between identical AC difference AP; In addition, the 2nd AP can be also identical AP with an AP, and this means that STA, after an AP who exits this STA association originally, is associated with an AP again.

When the 2nd AP AC corresponding from an AP is different, the 2nd AP and an AP are different AP, and this means that STA moves between the different AP of different AC.

The backup sheet of step 308, binding list item corresponding AC from the 2nd AP that the AC that the 2nd AP is corresponding is corresponding by above-mentioned STA moves into the formal table of the AC that the 2nd AP is corresponding, and notify the formal table of the AC that binding list item that AC that an AP is corresponding is corresponding by above-mentioned STA is corresponding from an AP to move into the backup sheet of the AC that an AP is corresponding, and continue execution step 309.

Step 309, judge whether STA initiates the DHCP application again.If so, perform step 310; If STA does not initiate the DHCP application again, perform step 312.

Particularly, if the 2nd AP adopts local forward mode,, after the 2nd AP receives the DHCP request message of STA transmission, the 2nd AP can determine that this STA initiates the DHCP application again; If adopting, the 2nd AP concentrates forward mode, after the 2nd AP receives the DHCP request message of STA transmission, this DHCP request message is sent to AC corresponding to the 2nd AP, after AC corresponding to the 2nd AP receives this DHCP request message, can determine that STA initiates the DHCP application again.

Step 310, generate according to the DHCP message in the DHCP application process binding list item and the filtering meter item that above-mentioned STA is corresponding, and continue execution step 311.

Particularly, the process that generates binding list item that above-mentioned STA is corresponding and filtering meter item according to the DHCP message in the DHCP application process refers to the description of the present invention in embodiment illustrated in fig. 4.

Step 311, the AC that the 2nd AP is corresponding send to other AC in same WLAN by binding list item corresponding to above-mentioned STA generated, so that other AC upgrades binding list item corresponding to above-mentioned STA of preserving separately, this flow process finishes.

Step 312, the lease of AC corresponding binding list item by above-mentioned STA that the 2nd AP is corresponding reverts to the first duration, by above-mentioned STA, in corresponding binding list item, the value of associated AP address field is updated to the address of the 2nd AP, by above-mentioned STA, in corresponding binding list item, the value of associated AC address field is updated to the address of the AC that the 2nd AP is corresponding, and also by above-mentioned STA, the lease of corresponding binding list item reverts to the first duration to announce interior other AC of same WLAN, by above-mentioned STA, in corresponding binding list item, the value of associated AP address field is updated to the address of the 2nd AP, by above-mentioned STA, in corresponding binding list item, the value of associated AC address field is updated to the address of the AC that the 2nd AP is corresponding, and continue to perform step 313.

In this step, if the 2nd AP and the corresponding identical AC of an AP, the AC that the 2nd AP is corresponding and other AC only need the binding list item that above-mentioned STA is corresponding in the value of associated AP address field be updated to the address of the 2nd AP.

If the 2nd AP and the corresponding different AC of an AP, the AC that the 2nd AP is corresponding and other need to the binding list item that above-mentioned STA is corresponding in the value of associated AP address field be updated to the address of the 2nd AP, and by above-mentioned STA in corresponding binding list item the value of associated AC address field be updated to the address of the AC that the 2nd AP is corresponding.

Step 313, generate filtering meter item corresponding to STA according to the binding list item after upgrading, and this flow process finishes.

Particularly, if above-mentioned the 2nd AP adopts local forward mode, the AC that the 2nd AP is corresponding is handed down to the 2nd AP by the binding list item after above-mentioned renewal, so that the 2nd AP generates according to the binding list item after above-mentioned renewal the filtering meter item that described STA is corresponding; Concentrate forward mode if the 2nd AP adopts, the AC that the 2nd AP is corresponding generates filtering meter item corresponding to STA according to the binding list item after above-mentioned renewal.

Step 314, forge DHCP NAK message and send to above-mentioned STA, again initiates the DHCP application to force above-mentioned STA, and continue execution step 315.

Particularly, if the 2nd AP adopts local forward mode, the 2nd AP forges DHCP NAK message and sends to above-mentioned STA; Concentrate forward mode if the 2nd AP adopts, the AC forgery DHCP NAK message that the 2nd AP is corresponding sends to above-mentioned STA.

Step 315, generate according to the DHCP message in the DHCP application process binding list item and the filtering meter item that above-mentioned STA is corresponding, and continue execution step 316.

Step 316, the AC that the 2nd AP is corresponding send to other AC in same WLAN by binding list item corresponding to above-mentioned STA generated, so that other AC is by above-mentioned STA, corresponding binding list item is saved in backup sheet separately, and this flow process finishes.

In above-described embodiment, the binding list item that STA is corresponding and filtering meter item unification are managed by AC, AP only need possess filtering meter item, the binding list item that after STA moves, this STA is corresponding can upgrade in time on former AC or new associated AC, the filtering meter item that STA is corresponding can generate in time on new associated AP, and former AP is upper to be deleted in time.After STA exits former associated AP, filtering meter item can be deleted in time on former associated AP, and binding list item is the residual shorter time only, can avoid the very long list item that causes of lease residual for a long time.

Fig. 4 is that the present invention generates binding list item that STA is corresponding and the flow chart of an embodiment of filtering meter item, and the present embodiment is introduced generating binding list item that STA is corresponding and the process of filtering meter item in the present invention's step 310 embodiment illustrated in fig. 3 and step 315.As shown in Figure 4, can comprise:

Step 401, the 2nd AP determines and self adopts local forward mode, or concentrates forward mode.If the 2nd AP adopts local forward mode, perform step 402.Concentrate forward mode if the 2nd AP adopts, perform step 407.

Step 402, the 2nd AP, according to the DHCP message in the DHCP application process, generates binding list item and filtering meter item that above-mentioned STA is corresponding, and continues execution step 403.

Step 403, the 2nd AP reports AC corresponding to the 2nd AP by binding list item corresponding to above-mentioned STA generated, and continues execution step 404.

Step 404, AC corresponding to the 2nd AP stores the binding list item that above-mentioned STA is corresponding, and continues execution step 405.

Step 405, the AC that the 2nd AP is corresponding sends and confirms notice to the 2nd AP, and continues execution step 406.

Step 406, after the 2nd AP receives above-mentioned confirmation notice, delete local binding list item corresponding to above-mentioned STA of preserving of the 2nd AP, and continue execution step 408.

Step 407, AC corresponding to the 2nd AP, according to the DHCP message in the DHCP application process, generates binding list item and filtering meter item that above-mentioned STA is corresponding, and continues execution step 408.

Step 408, AC corresponding to the 2nd AP broadcast the binding list item that above-mentioned STA is corresponding, so that in same WLAN, other AC is after receiving the binding list item that above-mentioned STA is corresponding, by above-mentioned STA, corresponding binding list item stores in the local backup sheet of preserving, and this flow process finishes.

Above-described embodiment can be realized generating binding list item and the filtering meter item that STA is corresponding, and can realize that binding list item and filtering meter item unification that STA is corresponding managed by AC, and AP only need possess filtering meter item.

The STA provided based on above-described embodiment again is associated with the processing procedure of the 2nd AP from an AP exits, following examples of the present invention provide several list item processing unit, respectively an AP, AC, the 2nd AP and AC corresponding to the 2nd AP that an AP is corresponding in corresponding said method embodiment.

The structural representation that Fig. 5 is an embodiment of list item processing unit of the present invention.This list item processing unit is arranged in an AP and realizes, and, in the present embodiment, an AP adopts local forward mode.As shown in Figure 5, described device comprises: determination module 51, removing module 52 and announcement module 53.

Whether determination module 51, exit an AP for the STA that determines an associated AP.

Removing module 52, be connected with determination module 51, for determining at determination module 51 after above-mentioned STA exits an AP, deletes the filtering meter item that above-mentioned STA is corresponding.

Announcement module 53, with determination module 51, be connected, for determining at determination module 51 after above-mentioned STA exits an AP, notify the above-mentioned STA of AC that an AP is corresponding to exit an AP, so that the lease of AC corresponding binding list item by above-mentioned STA corresponding to an AP is reduced to the second duration by the first duration, and the lease of announcing other AC corresponding binding list item by above-mentioned STA except AC corresponding to an AP in same WLAN (wireless local area network) is reduced to the second duration by the first duration; Wherein, the binding list item corresponding to above-mentioned STA of described other AC storages is that the AC corresponding by an AP sends.

Each functional module of the list item processing unit that the present embodiment provides can be used for carrying out the operating process of an AP when adopting local forward mode in said method embodiment, and its specific works principle repeats no more, and refers to the description of embodiment of the method.

The list item processing unit that the present embodiment provides, be arranged in an AP who adopts local forward mode and realize, after the STA that determines an associated AP exits an AP, delete the filtering meter item that this STA is corresponding, and announce AC corresponding to an AP and upgrade the binding list item that this STA is corresponding, realize the lease of binding list item being reduced the deletion of filtering meter item on old AP on the other hand on the one hand, prevent that the binding list item residence time is long.

The structural representation that Fig. 6 is another embodiment of list item processing unit of the present invention.This list item processing unit is arranged in the AC that an AP is corresponding and realizes, and, in the present embodiment, an AP adopts local forward mode.The list item processing unit that the list item processing unit that the present embodiment provides provides with Fig. 5 matches, and as shown in Figure 6, described device comprises: receiver module 61, update module 62 and announcement module 63.

Receiver module 61, exited the message of an AP for receiving above-mentioned STA that an AP announces after the STA that determines an associated AP exits an AP;

Update module 62, be connected with receiver module 61, and for receive the message that above-mentioned STA exited an AP at receiver module 61 after, by above-mentioned STA, the lease of corresponding binding list item is reduced to the second duration by the first duration.

Announcement module 63, with receiver module 61, be connected, after at receiver module 61, receiving the message that above-mentioned STA exited an AP, the lease of announcing other AC corresponding binding list item by above-mentioned STA except AC corresponding to an AP in same WLAN (wireless local area network) is reduced to the second duration by the first duration; Wherein, the binding list item corresponding to above-mentioned STA of described other AC storages is that the AC corresponding by an AP sends.

In an optional execution mode, described device can also comprise: removing module.This removing module, if again be not associated with the 2nd AP within described the second duration for above-mentioned STA, delete binding list item corresponding to above-mentioned STA the formal table of corresponding AC from an AP.

Announcement module 63, if also for above-mentioned STA, within described the second duration, again be not associated with the 2nd AP, announce other AC except AC corresponding to an AP in same WLAN (wireless local area network) and delete binding list item corresponding to above-mentioned STA from backup sheet separately.

Each functional module of the list item processing unit that the present embodiment provides can be used for carrying out in said method embodiment the operating process of the AC that the AP that adopts local forward mode is corresponding, and its specific works principle repeats no more, and refers to the description of embodiment of the method.

The list item processing unit that the present embodiment provides, with the list item processing unit provided embodiment illustrated in fig. 5, match, can guarantee STA filtering meter item deletion on old AP after exiting AP on the one hand, the lease of binding list item that on the other hand can STA is corresponding reduces, and prevents that the binding list item residence time is long.

The structural representation that Fig. 7 is the another embodiment of list item processing unit of the present invention.This list item processing unit is arranged in an AP and realizes, in the present embodiment, an AP adopts and concentrates forward mode.As shown in Figure 7, described device comprises: determination module 71 and announcement module 72.

Whether determination module 71, exit an AP for the STA that determines an associated AP.

Announcement module 72, with determination module 71, be connected, for determining at determination module 71 after above-mentioned STA exits an AP, notify the above-mentioned STA of AC that an AP is corresponding to exit an AP, so that AC corresponding to an AP deletes the filtering meter item that above-mentioned STA is corresponding, by above-mentioned STA, the lease of corresponding binding list item is reduced to the second duration by the first duration, and the lease of announcing other AC corresponding binding list item by above-mentioned STA except AC corresponding to an AP in same WLAN (wireless local area network) is reduced to the second duration by the first duration; Wherein, the binding list item corresponding to described website of described other AC storages is that the AC corresponding by an AP sends.

Each functional module of the list item processing unit that the present embodiment provides can be used for carrying out the operating process of an AP when adopting concentrated forward mode in said method embodiment, and its specific works principle repeats no more, and refers to the description of embodiment of the method.

The list item processing unit that the present embodiment provides, be arranged to adopt in an AP who concentrates forward mode and realize, after the STA that determines an associated AP exits an AP, announce AC corresponding to an AP, make AC corresponding to an AP delete the filtering meter item that this STA is corresponding, and upgrade the binding list item that this STA is corresponding, can after exiting AP, STA guarantee the deletion of filtering meter item on old AC that STA is corresponding on the one hand, the lease of binding list item that on the other hand can STA is corresponding reduces, and prevents that the binding list item residence time is long.

The structural representation that Fig. 8 is the another embodiment of list item processing unit of the present invention.This list item processing unit is arranged in the AC that an AP is corresponding and realizes, in the present embodiment, an AP adopts and concentrates forward mode.The list item processing unit that the list item processing unit that the present embodiment provides provides with Fig. 7 matches, and as shown in Figure 8, described device comprises: receiver module 81, removing module 82, update module 83 and announcement module 84.

Receiver module 81, exited the message of an AP for receiving above-mentioned STA that an AP announces after the STA that determines an associated AP exits an AP;

Removing module 82, be connected with receiver module 81, for receive the message that above-mentioned STA exited an AP at receiver module 81 after, deletes the filtering meter item that above-mentioned STA is corresponding;

Update module 83, be connected with receiver module 81, and for receive the message that above-mentioned STA exited an AP at receiver module 81 after, by above-mentioned STA, the lease of corresponding binding list item is reduced to the second duration by the first duration;

Announcement module 84, with receiver module 81, be connected, after at receiver module 81, receiving the message that above-mentioned STA exited an AP, the lease of announcing other AC corresponding binding list item by above-mentioned STA except AC corresponding to an AP in same WLAN (wireless local area network) is reduced to the second duration by the first duration; Wherein, the binding list item corresponding to above-mentioned STA of described other AC storages is that the AC corresponding by an AP sends.

In an optional execution mode, if also can be used for above-mentioned STA, removing module 82 again is not associated with the 2nd AP within described the second duration, delete binding list item corresponding to above-mentioned STA the formal table of corresponding AC from an AP;

Announcement module 84, if also for above-mentioned STA, within described the second duration, again be not associated with the 2nd AP, announce other AC except AC corresponding to an AP in same WLAN (wireless local area network) and delete binding list item corresponding to above-mentioned STA from backup sheet separately.

Each functional module of the list item processing unit that the present embodiment provides can be used for carrying out in said method embodiment the operating process that adopts the AC that the AP that concentrates forward mode is corresponding, and its specific works principle repeats no more, and refers to the description of embodiment of the method.

The list item processing unit that the present embodiment provides, with the list item processing unit provided embodiment illustrated in fig. 7, match, can guarantee STA filtering meter item deletion on old AC after exiting AP on the one hand, the lease of binding list item that on the other hand can STA is corresponding reduces, and prevents that the binding list item residence time is long.

In this explanation, above-described embodiment is illustrated the implementation structure of the AP that adopts local forward mode and concentrated forward mode and AC corresponding to AP separately.But in actual applications, same AP may support local forward mode and concentrated forward mode simultaneously and can be switched between two kinds of patterns,, for the implementation structure of this AP, those skilled in the art are easy to expect that the implementation structure of the AP of the local forward mode of above-mentioned employing and concentrated forward mode is carried out to the adaptability combination to be obtained; In like manner, the implementation structure of corresponding AC for this AP, those skilled in the art are easy to expect that the implementation structure of the AC that the AP of the local forward mode of above-mentioned employing and concentrated forward mode is corresponding carries out adaptability combination acquisition.

The structural representation that Fig. 9 is the another embodiment of list item processing unit of the present invention.This list item processing unit is arranged in the 2nd AP and realizes, and, in the present embodiment, the 2nd AP adopts local forward mode.As shown in Figure 9, described device comprises: notification module 91, receiver module 92 and generation module 93.

Notification module 91, while after exiting an AP for the STA as an associated AP, in the second duration, again being associated with the 2nd AP, if above-mentioned STA does not again initiate the DHCP application after again being associated with the 2nd AP, notify the above-mentioned STA of AC that the 2nd AP is corresponding to be associated with the 2nd AP and again not initiated the DHCP application, so that the lease of AC corresponding binding list item by above-mentioned STA corresponding to the 2nd AP reverts to the first duration, by above-mentioned STA, in corresponding binding list item, the value of association access point address field is updated to the address of the 2nd AP, and the lease of announcing other AC corresponding binding list item by above-mentioned STA except AC corresponding to the 2nd AP in same WLAN (wireless local area network) reverts to described the first duration, by above-mentioned STA, in corresponding binding list item, the value of association access point address field is updated to the address of the 2nd AP, the lease of the binding list item that wherein, above-mentioned STA is corresponding is that the AC that an AP is corresponding is reduced to described the second duration by described the first duration after described website exits an AP,

Receiver module 92, be connected with notification module 91, after at notification module 91, notifying the AC that the 2nd AP is corresponding, receives the binding list item after the renewal that AC corresponding to the 2nd AP send;

Generation module 93, be connected with receiver module 92, for the binding list item after the described renewal received according to receiver module 92, generates the filtering meter item that described website is corresponding.

In an optional execution mode, described device can also comprise: constructing module.This constructing module, for when above-mentioned STA again is associated with the 2nd AP after described the second duration, structure DHCP denies that message sends to above-mentioned STA, to force above-mentioned STA, again initiates the DHCP application;

Based on constructing module, generation module 93, also, for again initiate the DHCP application at above-mentioned STA after, generate according to the DHCP message in the DHCP application process binding list item and the filtering meter item that above-mentioned STA is corresponding.

Further alternative, generation module 93, if also for above-mentioned STA, in described the second duration, again be associated with the 2nd AP and again initiate the DHCP application after again being associated with the 2nd AP, after above-mentioned STA initiates the DHCP application again, according to the DHCP message in the DHCP application process, generate binding list item and the filtering meter item that above-mentioned STA is corresponding.

Above-mentioned generation module 93, for again initiate the DHCP application at above-mentioned STA after, generates according to the DHCP message in the DHCP application process binding list item and the filtering meter item that above-mentioned STA is corresponding and comprises:

Generation module 93 is specifically for after again initiating the DHCP application at above-mentioned STA, generate according to the DHCP message in the DHCP application process binding list item that above-mentioned STA is corresponding, according to above-mentioned STA, corresponding binding list item generates the filtering meter item that above-mentioned STA is corresponding, and corresponding binding list item sends to AC corresponding to the 2nd AP by above-mentioned STA, so that AC corresponding to the 2nd AP by above-mentioned STA, corresponding binding list item is saved in the formal table of the AC that the 2nd AP is corresponding, and after sending to the AC that the 2nd AP is corresponding, the binding list item that above-mentioned STA is corresponding deletes binding list item corresponding to above-mentioned STA.

Each functional module of the list item processing unit that the present embodiment provides can be used for carrying out in said method embodiment operating process when the 2nd AP adopts local forward mode, and its specific works principle repeats no more, and refers to the description of embodiment of the method.

The list item processing unit that the present embodiment provides, be arranged in the 2nd AP that adopts local forward mode, the AC corresponding with an AP and an AP etc. matches, can in the situation that STA exit an AP and again be associated with the 2nd AP and again do not initiate DHCP application in the second duration, binding list item during by the associated AP of renewal STA, and the binding list item based on after upgrading generates filtering meter item on new the 2nd associated AP of STA, and then guaranteed that STA can proper communication.

The structural representation that Figure 10 is the another embodiment of list item processing unit of the present invention.This list item processing unit is arranged in the AC that the 2nd AP is corresponding and realizes, and, in the present embodiment, the 2nd AP adopts local forward mode.The list item processing unit that the list item processing unit of the present embodiment provides with Fig. 9 matches, and as shown in figure 10, described device comprises: receiver module 1001, update module 1002, announcement module 1003 and sending module 1004.

Receiver module 1001, for receiving the 2nd AP when the STA that determines an associated AP exits an AP and again be associated with the 2nd AP and again do not initiate the DHCP application in the second duration, the above-mentioned STA of notice has been associated with the 2nd AP and has not again initiated the message of DHCP application;

Update module 1002, with receiver module 1001, be connected, for after receiving above-mentioned STA at receiver module 1001 and being associated with the 2nd AP and again not initiated the message of DHCP application, by above-mentioned STA, the lease of corresponding binding list item reverts to the first duration, and by above-mentioned STA, in corresponding binding list item, the value of association access point address field is updated to the address of the 2nd AP; The lease of the binding list item that wherein, above-mentioned STA is corresponding is that the AC that an AP is corresponding is reduced to described the second duration by described the first duration after above-mentioned STA exits an AP;

Announcement module 1003, with receiver module 1001, be connected, for after receiving above-mentioned STA at receiver module 1001 and being associated with the 2nd AP point and again not initiated message that DHCP applies for, the lease of announcing other AC corresponding binding list item by above-mentioned STA except AC corresponding to the 2nd AP in same WLAN (wireless local area network) reverts to described the first duration, and by above-mentioned STA, in corresponding binding list item, the value of association access point address field is updated to the address of the 2nd AP;

Sending module 1004, be connected with update module 1002, sends to the 2nd AP for the binding list item after update module 1002 is upgraded, so that the 2nd AP generates according to the binding list item after described renewal the filtering meter item that above-mentioned STA is corresponding.

In an optional execution mode, the AC that the AC that the 2nd AP is corresponding is corresponding with an AP is identical.

In an optional execution mode, the AC that the AC that the 2nd AP is corresponding is corresponding from an AP is different.Based on this, described device can also comprise: mobile module.This mobile module, revert to described the first duration for the lease at update module 1002 corresponding binding list item by above-mentioned STA, before by above-mentioned STA, in corresponding binding list item, the value of association access point address field is updated to the address of the 2nd AP, by above-mentioned STA, the backup sheet of corresponding binding list item corresponding AC from the 2nd AP moves into the formal table of the AC that the 2nd AP is corresponding;

Accordingly, announcement module 1003, also move on to the backup sheet of the AC that an AP is corresponding for the formal table of announcing binding list item corresponding AC from an AP that AC that an AP is corresponding is corresponding by above-mentioned STA.

Each functional module of the list item processing unit that the present embodiment provides can be used for carrying out in said method embodiment the operating process of the AC that the 2nd AP that adopts local forward mode is corresponding, and its specific works principle repeats no more, and refers to the description of embodiment of the method.

The list item processing unit that the present embodiment provides, with the list item processing unit provided embodiment illustrated in fig. 9, match, can in the situation that STA exit an AP and again be associated with the 2nd AP and again do not initiate DHCP application in the second duration, binding list item during by the associated AP of renewal STA, and the binding list item based on after upgrading generates filtering meter item on new the 2nd associated AP of STA, and then guaranteed that STA can proper communication.

The structural representation that Figure 11 is the another embodiment of list item processing unit of the present invention.This list item after-treatment device is arranged in the AC that the 2nd AP is corresponding and realizes, and, in the present embodiment, the 2nd AP adopts and concentrates forward mode.As shown in figure 11, described device comprises: receiver module 1101, update module 1102, announcement module 1103 and generation module 1104.

Receiver module 1101, for receiving the 2nd AP when the STA that determines an associated AP exits an AP and again be associated with the 2nd AP and again do not initiate the DHCP application in the second duration, the above-mentioned STA of notice has been associated with the 2nd AP and has not again initiated the message of DHCP application;

Update module 1102, with receiver module 1101, be connected, for after receiving above-mentioned STA at receiver module 1101 and being associated with the 2nd AP and again not initiated the message of DHCP application, by above-mentioned STA, the lease of corresponding binding list item reverts to the first duration, and by above-mentioned STA, in corresponding binding list item, the value of association access point address field is updated to the address of the 2nd AP; The lease of the binding list item that wherein, above-mentioned STA is corresponding is that the AC that an AP is corresponding is reduced to described the second duration by described the first duration after above-mentioned STA exits an AP;

Announcement module 1103, with receiver module 1101, be connected, for after receiving above-mentioned STA at receiver module 1101 and being associated with the 2nd AP and again not initiated the message of DHCP application, the lease of announcing other AC corresponding binding list item by above-mentioned STA except AC corresponding to the 2nd AP in same WLAN (wireless local area network) reverts to described the first duration, and by above-mentioned STA, in corresponding binding list item, the value of association access point address field is updated to the address of the 2nd AP;

Generation module 1104, be connected with update module 1102, for the binding list item after upgrading according to update module 1102, generates the filtering meter item that above-mentioned STA is corresponding.

In an optional execution mode, the AC that the AC that the 2nd AP is corresponding is corresponding from an AP is different.Based on this, described device can also comprise: mobile module.This mobile module, revert to described the first duration for the lease at update module 1102 corresponding binding list item by above-mentioned STA, before by above-mentioned STA, in corresponding binding list item, the value of association access point address field is updated to the address of the 2nd AP, by above-mentioned STA, the backup sheet of corresponding binding list item corresponding AC from the 2nd AP moves into the formal table of the AC that the 2nd AP is corresponding;

Accordingly, announcement module 1103, also move on to the backup sheet of the AC that an AP is corresponding for the formal table of announcing binding list item corresponding AC from an AP that AC that an AP is corresponding is corresponding by above-mentioned STA.

Further, receiver module 1101 also again is associated with at definite above-mentioned STA the above-mentioned STA notified after the 2nd AP has been associated with the message of the 2nd AP after described the second duration for receiving the 2nd AP after described the second duration.

Based on above-mentioned, described device also comprises: constructing module.This constructing module, for receiving at receiver module 1101 after above-mentioned STA has been associated with the message of the 2nd AP after described the second duration, structure DHCP denies that message sends to above-mentioned STA, to force above-mentioned STA, again initiates the DHCP application.

Accordingly, generation module 1104, also, for again initiate the DHCP application at above-mentioned STA after, generate according to the DHCP message in the DHCP application process binding list item and the filtering meter item that above-mentioned STA is corresponding.

Further, generation module 1104, for again initiate the DHCP application at above-mentioned STA after, generates according to the DHCP message in the DHCP application process binding list item and the filtering meter item that above-mentioned STA is corresponding and comprises:

Generation module 1104 is specifically for after again initiating the DHCP application at above-mentioned STA, generate according to the DHCP message in the DHCP application process binding list item that above-mentioned STA is corresponding, according to above-mentioned STA, corresponding binding list item generates the filtering meter item that above-mentioned STA is corresponding, and corresponding binding list item is saved in the formal table of the AC that the 2nd AP is corresponding by above-mentioned STA.

Each functional module of the list item processing unit that the present embodiment provides can be used for carrying out in said method embodiment the operating process that adopts the AC that the 2nd AP that concentrates forward mode is corresponding, and its specific works principle repeats no more, and refers to the description of embodiment of the method.

The list item processing unit that the present embodiment provides, with the 2nd AP that adopts concentrated forward mode, match, can in the situation that STA exit an AP and again be associated with the 2nd AP and again do not initiate DHCP application in the second duration, binding list item during by the associated AP of renewal STA, and the binding list item based on after upgrading generates filtering meter item on new the 2nd associated AP of STA, and then guaranteed that STA can proper communication.

In this explanation, above-described embodiment is separately to adopting the AP of local forward mode, and adopts the implementation structure of the AC that the AP of local forward mode and concentrated forward mode is corresponding to be illustrated.But in actual applications, same AP may support local forward mode and concentrated forward mode simultaneously and can be switched between two kinds of patterns, for the implementation structure of this AP, those skilled in the art are easy to expect the function of integrated concentrated forward mode on the implementation structure of the AP of the local forward mode of above-mentioned employing and obtain; In like manner, the implementation structure of corresponding AC for this AP, those skilled in the art are easy to expect that the implementation structure of the AC that the AP of the local forward mode of above-mentioned employing and concentrated forward mode is corresponding carries out adaptability combination acquisition.

One of ordinary skill in the art will appreciate that: realize that the hardware that all or part of step of above-mentioned each embodiment of the method can be relevant by program command completes.Aforesaid program can be stored in a computer read/write memory medium.This program, when carrying out, is carried out the step that comprises above-mentioned each embodiment of the method; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CDs.

Finally it should be noted that: above each embodiment, only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to aforementioned each embodiment, the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: its technical scheme that still can put down in writing aforementioned each embodiment is modified, or some or all of technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the scope of various embodiments of the present invention technical scheme.

Claims

1. a table entry processing method, is characterized in that, comprising:

2. method according to claim 1, is characterized in that, the filtering meter item that the described website of described deletion is corresponding, and by described website, the lease of corresponding binding list item is reduced to the second duration by the first duration and comprises:

If described the first access point adopts local forward mode, described the first access point is deleted the filtering meter item that described website is corresponding, and notifies the described website of access controller that described the first access point is corresponding to exit described the first access point; Access controller corresponding to described the first access point is after knowing that described website has exited described the first access point, by described website, the lease of corresponding binding list item is reduced to the second duration by the first duration, and the lease of announcing other access controller corresponding binding list item by described website except access controller corresponding to described the first access point in same WLAN (wireless local area network) is reduced to the second duration by the first duration; Wherein, the binding list item corresponding to described website of described other access controller storages is that the access controller corresponding by described the first access point sends;

Concentrate forward mode if described the first access point adopts, described the first access point notifies the described website of access controller that described the first access point is corresponding to exit described the first access point; Access controller corresponding to described the first access point is after knowing that described website has exited described the first access point, delete the filtering meter item that described website is corresponding, by described website, the lease of corresponding binding list item is reduced to the second duration by the first duration, and the lease of announcing other access controller corresponding binding list item by described website except access controller corresponding to described the first access point in same WLAN (wireless local area network) is reduced to the second duration by the first duration.

3. method according to claim 2, it is characterized in that, it is described that by described website, the lease of corresponding binding list item reverts to described the first duration, and by described website in corresponding binding list item the value of association access point address field be updated to the address of described the second access point, comprising:

Described the second access point notifies the described website of access controller that described the second access point is corresponding to be associated with described the second access point and again not initiated the DHCP application;

Access controller corresponding to described the second access point is after knowing that described website has been associated with described the second access point and has not again initiated the DHCP application, by described website, the lease of corresponding binding list item reverts to described the first duration, by described website, in corresponding binding list item, the value of association access point address field is updated to the address of described the second access point, and the lease of announcing other access controller corresponding binding list item by described website except access controller corresponding to described the second access point in same WLAN (wireless local area network) reverts to described the first duration, by described website, in corresponding binding list item, the value of association access point address field is updated to the address of described the second access point,

Describedly according to the binding list item after upgrading, generate the filtering meter item that described website is corresponding, comprising:

If described the second access point adopts local forward mode, the access controller that described the second access point is corresponding sends to described the second access point by the binding list item after upgrading; Described the second access point generates according to the binding list item after described renewal the filtering meter item that described website is corresponding;

If adopting, described the second access point concentrates forward mode, access controller corresponding to described the second access point, after knowing that described website has been associated with described the second access point and has not again initiated the DHCP application, generates according to the binding list item after described renewal the filtering meter item that described website is corresponding.

4. method according to claim 3, is characterized in that, the access controller that the access controller that described the second access point is corresponding is corresponding with described the first access point is identical.

5. method according to claim 3, is characterized in that, the access controller that the access controller that described the second access point is corresponding is corresponding from described the first access point is different;

The lease of access controller corresponding binding list item by described website that described the second access point is corresponding reverts to described the first duration, before by described website, in corresponding binding list item, the value of association access point address field is updated to the address of described the second access point, also comprise:

The backup sheet of binding list item corresponding access controller from described the second access point that the access controller that described the second access point is corresponding is corresponding by described website moves into the formal table of the access controller that described the second access point is corresponding, and the formal table of announcing binding list item corresponding access controller from described the first access point that access controller that described the first access point is corresponding is corresponding by described website moves on to the backup sheet of the access controller that described the first access point is corresponding.

6. according to the described method of claim 1-5 any one, it is characterized in that, also comprise:

If described website again is not associated with described the second access point within described the second duration, delete binding list item corresponding to described website the formal table of access controller corresponding access controller from described the first access point that described the first access point is corresponding, and announce other access controller except access controller corresponding to described the first access point in same WLAN (wireless local area network) and delete binding list item corresponding to described website from backup sheet separately.

7. method according to claim 6, is characterized in that, also comprises:

When described website again is associated with described the second access point after described the second duration, structure DHCP denies that message sends to described website, again initiate the DHCP application to force described website, and, after described website is initiated the DHCP application again, according to the DHCP message in the DHCP application process, generate binding list item and the filtering meter item that described website is corresponding.

8. method according to claim 7, it is characterized in that, described structure DHCP denies that message sends to described website, again initiate the DHCP application to force described website, and after described website is initiated the DHCP application again, generate according to the DHCP message in the DHCP application process binding list item and the filtering meter item that described website is corresponding, comprising:

If described the second access point adopts local forward mode, described the second access point is constructed described DHCP and is denied that message sends to described website, again initiate the DHCP application to force described website, and after described website is initiated the DHCP application again, generate according to the DHCP message in the DHCP application process binding list item that described website is corresponding, according to described website, corresponding binding list item generates the filtering meter item that described website is corresponding, and corresponding binding list item sends to access controller corresponding to described the second access point by described website, so that access controller corresponding to described the second access point by described website, corresponding binding list item is saved in the formal table of the access controller that described the second access point is corresponding, and after sending to the access controller that described the second access point is corresponding, the binding list item that described website is corresponding deletes binding list item corresponding to described website,

If adopting, described the second access point concentrates forward mode, described the second access point notifies the described website of access controller that described the second access point is corresponding to be associated with described the second access point after described the second duration, access controller corresponding to described the second access point is after knowing that described website has been associated with described the second access point after described the second duration, construct described DHCP and deny that message sends to described website, again initiate the DHCP application to force described website, and after described website is initiated the DHCP application again, generate according to the DHCP message in the DHCP application process binding list item that described website is corresponding, according to described website, corresponding binding list item generates the filtering meter item that described website is corresponding, and corresponding binding list item is saved in the formal table of the access controller that described the second access point is corresponding by described website.

9. method according to claim 8, is characterized in that, after binding list item and filtering meter item that the described website of described generation is corresponding, also comprises:

By described website, corresponding binding list item sends to other access controller except access controller corresponding to described the second access point in same WLAN (wireless local area network) to access controller corresponding to described the second access point, so that described other access controller is by described website, corresponding binding list item is saved in backup sheet separately.

10. a list item processing unit, be arranged in the first access point and realize, described the first access point adopts local forward mode, it is characterized in that, described device comprises:

11. a list item processing unit, be arranged in the access controller that the first access point is corresponding and realize, described the first access point adopts local forward mode, it is characterized in that, described device comprises:

12. device according to claim 11, is characterized in that, also comprises:

Removing module, if again be not associated with the second access point within described the second duration for described website, delete binding list item corresponding to described website the formal table of corresponding access controller from described the first access point;

Described announcement module, if also for described website, within described the second duration, again be not associated with described the second access point, announce other access controller except access controller corresponding to described the first access point in same WLAN (wireless local area network) and delete binding list item corresponding to described website from backup sheet separately.

13. a list item processing unit, be arranged in the first access point and realize, described the first access point adopts concentrates forward mode, it is characterized in that, described device comprises:

14. a list item processing unit, be arranged in the access controller that the first access point is corresponding and realize, described the first access point adopts concentrates forward mode, it is characterized in that, described device comprises:

15. device according to claim 14, is characterized in that,

Described removing module, if also for described website, within described the second duration, again be not associated with the second access point, delete binding list item corresponding to described website the formal table of corresponding access controller from described the first access point;

16. a list item processing unit, be arranged in the second access point and realize, described the second access point adopts local forward mode, it is characterized in that, described device comprises:

17. device according to claim 16, is characterized in that, also comprises:

Constructing module, for when described website again is associated with described the second access point after described the second duration, structure DHCP denies that message sends to described website, to force described website, again initiates the DHCP application;

Described generation module, also, for again initiate the DHCP application at described website after, generate according to the DHCP message in the DHCP application process binding list item and the filtering meter item that described website is corresponding.

18. device according to claim 17, is characterized in that, described generation module, for again initiate the DHCP application at described website after, generates according to the DHCP message in the DHCP application process binding list item and the filtering meter item that described website is corresponding and comprises:

Described generation module is specifically for after again initiating the DHCP application at described website, generate according to the DHCP message in the DHCP application process binding list item that described website is corresponding, according to described website, corresponding binding list item generates the filtering meter item that described website is corresponding, and corresponding binding list item sends to access controller corresponding to described the second access point by described website, so that access controller corresponding to described the second access point by described website, corresponding binding list item is saved in the formal table of the access controller that described the second access point is corresponding, and after sending to the access controller that described the second access point is corresponding, the binding list item that described website is corresponding deletes binding list item corresponding to described website.

19. a list item processing unit, be arranged in the access controller that the second access point is corresponding and realize, described the second access point adopts local forward mode, it is characterized in that, described device comprises:

20. device according to claim 19, is characterized in that, the access controller that the access controller that described the second access point is corresponding is corresponding from described the first access point is different;

Described device also comprises:

Mobile module, revert to described the first duration for the lease at described update module corresponding binding list item by described website, before by described website, in corresponding binding list item, the value of association access point address field is updated to the address of described the second access point, by described website, the backup sheet of corresponding binding list item corresponding access controller from described the second access point moves into the formal table of the access controller that described the second access point is corresponding;

Described announcement module, also move on to the backup sheet of the access controller that described the first access point is corresponding for the formal table of announcing binding list item corresponding access controller from described the first access point that access controller that described the first access point is corresponding is corresponding by described website.

21. a list item processing unit, be arranged in the access controller that the second access point is corresponding and realize, described the second access point adopts concentrates forward mode, it is characterized in that, described device comprises:

22. device according to claim 21, is characterized in that, the access controller that the access controller that described the second access point is corresponding is corresponding from described the first access point is different;

Described device also comprises:

23. according to the described device of claim 21 or 22, it is characterized in that,

Described receiver module also again is associated with at definite described website the described website of notifying after described the second access point has been associated with the message of described the second access point after described the second duration for receiving described the second access point after described the second duration;

Described device also comprises:

Constructing module, for receiving at described receiver module after described website has been associated with the message of described the second access point after described the second duration, structure DHCP denies that message sends to described website, to force described website, again initiates the DHCP application;

24. device according to claim 23, is characterized in that, described generation module, for again initiate the DHCP application at described website after, generates according to the DHCP message in the DHCP application process binding list item and the filtering meter item that described website is corresponding and comprises:

Described generation module is specifically for after again initiating the DHCP application at described website, generate according to the DHCP message in the DHCP application process binding list item that described website is corresponding, according to described website, corresponding binding list item generates the filtering meter item that described website is corresponding, and corresponding binding list item is saved in the formal table of the access controller that described the second access point is corresponding by described website.