CN107231449A - A kind of ARP request retransmission method, device and WLAN communication systems - Google Patents
A kind of ARP request retransmission method, device and WLAN communication systems Download PDFInfo
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- CN107231449A CN107231449A CN201610177730.8A CN201610177730A CN107231449A CN 107231449 A CN107231449 A CN 107231449A CN 201610177730 A CN201610177730 A CN 201610177730A CN 107231449 A CN107231449 A CN 107231449A
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- terminal
- wlan
- rarp
- controllers
- arp
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/09—Mapping addresses
- H04L61/10—Mapping addresses of different types
- H04L61/103—Mapping addresses of different types across network layers, e.g. resolution of network layer into physical layer addresses or address resolution protocol [ARP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/10—Small scale networks; Flat hierarchical networks
- H04W84/12—WLAN [Wireless Local Area Networks]
Abstract
The embodiment of the present invention provides a kind of ARP request retransmission method, device and WLAN communication systems, and a kind of WLAN communication systems include：At least two WLAN controllers and at least two AP；First AP sends the first ARP request to the first WLAN controllers or the first RARP is asked, and wherein source MAC is the MAC Address of first terminal, for making the first WLAN controllers determine that first terminal is connected with the first AP；First WLAN controllers also receive the second ARP request of gateway transmission, and the second ARP request is used for the MAC Address for asking second terminal；The second arp response is sent to gateway after first WLAN controllers inquiry user's table, the MAC Address carried in the second arp response is the MAC Address of second terminal.ARP request retransmission method provided in an embodiment of the present invention, device and WLAN communication systems, to improve the transmission performance of wlan network.
Description
Technical field
The application is related to the communication technology, more particularly to a kind of ARP request retransmission method, device and WLAN communication systems.
Background technology
The current mobile terminal such as smart mobile phone and tablet personal computer is both provided by WLAN (English：wireless
Local access network, WLAN) online function.Due to a WLAN access point (English：Access point, AP)
The scope of covering is limited, can be disposed under the scene that the WLAN such as airport, subway, stadium, library are covered on a large scale many
Individual AP.Terminal is during wlan network is switched to from the AP currently connected and connects another AP, the clothes of the network of terminal access
Business set identifier (English：Service Set Identifier, SSID) and terminal Internet protocol (English：Internet
Protocol, IP) address is constant, and the unbroken communication mode of business of terminal, is exactly the terminal roaming under wlan network.
Terminal roaming mode under wlan network is divided into the roaming mode based on three layers (L3) and overflowing based on two layers (L2)
Roam all around the would formula.The IP address of wlan network residing before and after terminal roaming belongs to different sub-network wherein in the roaming mode based on L3,
And the IP address of wlan network residing before and after terminal roaming in the roaming mode based on L3 belongs to identical subnet.
Fig. 1 is a kind of data forwarding schematic diagram of the terminal roaming mode based on L3 networkings.As shown in figure 1, terminal roaming
Front and rear wlan network overlay area is respectively " #1 " and " #2 ", its IP address be belonging respectively to " 10.1.0.0/24 " and
" 192.1.0.0/24 " the two subnets, the IP address in two regions belongs to different sub-network.Terminal is accessed from region #1, and from area
Domain #1 is roamed to region #2, and the IP address of terminal belongs to the corresponding subnets of region #1.In order to ensure terminal in roam procedure
IP address is constant and business is not interrupted, then the data traffic of the terminal after roaming needs gateway forwards via region #2 to area
Domain #1 gateway, then transmit to core network (Core).It is apparent that being turned using the data of the terminal roaming mode based on L3 networkings
Hair, can produce a large amount of IP data roundabout between gateway.
Fig. 2 is a kind of data forwarding schematic diagram of the terminal roaming mode based on L2 networkings.As shown in Fig. 2 terminal roaming
Front and rear wlan network overlay area is respectively " #1 " and " #2 ", and its IP address belongs to " 192.1.0.0/16 " this subnet.
Terminal is accessed from region #1, and is roamed from region #1 to region #2, and the data traffic of the terminal after roaming can pass through region #2
Gateway transmit to core network, without again by the roundabout gateway to region #1 of data traffic.But, it is this to be based on L2 networkings
Terminal roaming mode, be only applicable to small-scale wlan network.For large-scale L2 networks, because terminal is after roaming,
Gateway needs all terminal broadcast address resolution protocols (English into network：Address Resolution Protocol,
ARP) message, will cause broadcasting packet excessive, the problem of collision probability is high, network efficiency is low.
Fig. 3 is the data forwarding schematic diagram of another terminal roaming mode based on L2 networkings, as shown in figure 3, at this
One gateway is only set in wlan network, and the IP address of the wlan network overlay area belongs to a subnet.This mode can be protected
The IP address of terminal after card roaming does not change, and avoids the problem of certain broadcasting packet spreads.But due under each AP
The data traffic of terminal must all focus on unique gateway and forwarded, therefore, the end based on L2 networkings shown in Fig. 3
Hold in roaming mode, face to face during the amount of bordering on the sea Data Concurrent, the disposal ability of the gateway turns into the bottleneck of restriction network transmission performance.
In summary, in the terminal roaming scene of wlan network, network transmission performance is very limited.
The content of the invention
The application provides a kind of ARP request retransmission method, device and WLAN communication systems, to improve the transmission of wlan network
Performance.
First aspect provides a kind of WLAN communication systems, including：At least two WLAN controllers and at least two AP；
The WLAN communication systems are connected with a gateway, wherein in the gateway and at least two WLAN controllers
Each WLAN controller be connected, at least two described in each WLAN controller managements at least two WLAN controllers
Each AP at least one AP in AP, at least two AP only belong at least two WLAN controllers one
Individual WLAN controllers；
At least two WLAN controllers include the first WLAN controllers, and at least two AP includes the first AP, its
In, the first AP is the AP of the first WLAN controller managements, in the first WLAN controllers storage include with it is described
The MAC Address and user's table of IP address of the terminal of the AP connections of first WLAN controller managements；
First AP is used to send the first ARP request or the first reverse address resolution to the first WLAN controllers
Agreement (English：Reverse Address Resolution Protocol, RARP) request, first ARP request or institute
State the first RARP to ask to be used to make the first WLAN controllers determine that the first terminal is connected with the first AP, described the
One ARP request or the first RARP request source MAC be first terminal MAC Address, the first terminal be with
Any terminal of the first AP connections；
The first WLAN controllers are additionally operable to receive the second ARP request that the gateway is sent, second ARP request
MAC Address for asking second terminal, the second terminal is the end being connected with the AP of the first WLAN controller managements
Any terminal in end in addition to the first terminal；
The first WLAN controllers are additionally operable to inquire about after user's table to the gateway and send the second arp response, institute
State the MAC Address that the MAC Address carried in the second arp response is the second terminal.
In the WLAN communication systems that the present embodiment is provided, the frame of centralized gateway and distributed WLAN controller is employed
Structure.WLAN controllers determine that terminal is connected to self-administered network according to the ARP request from end side.And by WLAN controls
Device is responsible for carrying out response to the ARP request from network side.Asked by the ARP request from network side address in the response
MAC Address, be referred to as ARP generation answer.So distributed WLAN will be all concentrated on to the answer from network side ARP request
Carried out on controller, it is to avoid the situation for the excessive air interface transmission resource of occupancy brought to terminal broadcast ARP request.Therefore, this reality
Applying the WLAN communication systems of example offer can avoid in network taking excessive air interface transmission resource to the ARP request of terminal broadcast
Situation, so as to improve the transmission performance of network.
Further, in a kind of possible implementation of first aspect, the first WLAN controllers are additionally operable to institute
State the first AP and send the first arp response or the first RARP responses, what first arp response or the first RARP were responded
Source MAC is the MAC Address of the gateway.
It is responsible for carrying out response, the wherein source MAC in the response to the ARP request from end side by WLAN controllers
For the MAC Address of gateway, proxy ARP is referred to as.Gateway can be avoided to concentrate response ARP request to the pressure of gate performance.
The process performance to the concurrent ARP request of a large number of users in network can be improved, so as to further improve the transmission performance of network.
Further, in a kind of possible implementation of first aspect, the first AP is used for when determination described first
When terminal is connected with the first AP, first ARP request or the first RARP are sent to the first WLAN controllers
Request.
Further, in a kind of possible implementation of first aspect, the first AP is used for the first WLAN
Controller forwards first ARP request or the first RARP requests of the first terminal transmission.
That is, the first AP can be when it is determined that first terminal be connected with the first AP, actively to the first WLAN controllers
Send the first ARP request or the first RARP requests；First AP can also receive first terminal transmission the first ARP request or
After first RARP requests, only first ARP request or the first RARP is passively forwarded to ask to the first WLAN controllers.
Further, in a kind of possible implementation of first aspect, the first WLAN controllers are additionally operable to, and are being connect
Receive after first ARP request or the first RARP requests, judge that first ARP request or the first RARP please
Whether the source MAC asked is stored in user's table of the first WLAN controllers；
If first ARP request or the source MAC of the first RARP requests are not stored in the first WLAN controls
In user's table of device processed, then the first WLAN controllers send the 3rd ARP request to the gateway or the 3rd RARP is asked, institute
State the 3rd ARP request or the 3rd RARP asks to be used to make the gateway determine that the first terminal is controlled with the first WLAN
The AP connections of device management processed, the source MAC of the 3rd ARP request or the 3rd the RARP request is the MAC of the first terminal
Address；
If first ARP request or the source MAC of the first RARP requests are stored in the first WLAN controls
In user's table of device, then the first WLAN controllers stop forwarding first ARP request or the first RARP requests.
The first ARP request or the first RARP requests are received in the first WLAN controllers, determines that first terminal is connected to the
After the AP of one WLAN controller managements, it can also judge whether the source MAC of first terminal is stored in the first WLAN controllers
User's table in, if it is not, then the first WLAN controllers need to send the MAC Address of first terminal to gateway, gateway is also deposited
The ARP information of first terminal is stored up, so that gateway updates the MAC table and ARP table of itself storage, so as to the data in network
Forwarded.
Further, in a kind of possible implementation of first aspect, at least two WLAN controllers also include
2nd WLAN controllers；
The first WLAN controllers are additionally operable to, and receive the 4th ARP request or the 4th RARP that the first AP is sent
Request, the 4th ARP request or the 4th RARP ask to be used to make the first WLAN controllers determine third terminal
It is connected with the first AP, the source MAC of the 4th ARP request or the 4th RARP request is third terminal
MAC Address, the third terminal is except the first terminal in the terminal that be connected with the AP of the first WLAN controller managements
With any terminal outside the second terminal；
The first WLAN controllers are additionally operable to, and are receiving the 4th ARP request or the 4th RARP requests
Afterwards, management described the is determined according to the 4th ARP request or the 4th RARP source IP address asked and source MAC
The WLAN controllers for the AP that three terminals are connected before the first AP is connected；
If the WLAN controllers for managing the AP that the third terminal is connected before the first AP is connected are described second
WLAN controllers, then the first WLAN controllers to the 2nd WLAN controllers send management migration request；
The first WLAN controllers migrate response, the management with receiving the management that the 2nd WLAN controllers are sent
Migration response carries the user right of the third terminal.
So, after the network that third terminal is managed from the 2nd WLAN network migrations managed to the first WLAN, it can make
The authority that the first WLAN controllers obtain management third terminal is obtained, so as to complete terminal transfer flow.
Further, in a kind of possible implementation of first aspect, the WLAN controllers and at least the two of management
Individual AP is connected by tunnel.
Between each WLAN controllers and its AP managed in addition to direct physical connection, it can also be connected by tunnel.
There is the connecting link of physics between the AP that i.e. each WLAN controllers can be managed with it, can also be connected by logical tunnel
Connect.In a word, as long as WLAN controllers can intercept and capture ARP request or the RARP requests of AP transmissions.
Second aspect provides a kind of arp request sender's method, for performing the first WLAN in above-mentioned WLAN control systems
The processing of controller, its implementation procedure and technique effect are as described above.
The third aspect provides a kind of ARP request dispensing device, and the ARP request dispensing device is used to realize above-mentioned ARP request
Sending method, the ARP request dispensing device includes receiving module, sending module, processing module and memory module, each module difference
For performing the reception in above-mentioned first WLAN controllers, transmission, processing and store function.
Fourth aspect provides a kind of WLAN controllers, and the WLAN controllers are the first WLAN in above-mentioned WLAN control systems
Controller, including：Communication interface, memory and processor.Wherein communication interface can be any wired or wireless way
Communication interface, reception and transmission for carrying out data；Processor is used to complete all processing functions in WLAN controllers, and
Data are received and sent by communication interface；Memory is used to store all data in WLAN controllers.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are this hairs
Some bright embodiments, for those of ordinary skill in the art, without having to pay creative labor, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is a kind of data forwarding schematic diagram of the terminal roaming mode based on L3 networkings；
Fig. 2 is a kind of data forwarding schematic diagram of the terminal roaming mode based on L2 networkings；
Fig. 3 is the data forwarding schematic diagram of another terminal roaming mode based on L2 networkings；
Fig. 4 is the structural representation of WLAN communication systems provided in an embodiment of the present invention；
Fig. 5 provides another structural representation of WLAN communication systems for the embodiment of the present invention；
Fig. 6 is the flow chart of arp request sender's method embodiment one provided in an embodiment of the present invention；
Fig. 7 is the flow chart of arp request sender's method embodiment two provided in an embodiment of the present invention；
Fig. 8 is the flow chart of arp request sender's method embodiment three provided in an embodiment of the present invention；
Fig. 9 is the flow chart of arp request sender's method example IV provided in an embodiment of the present invention；
Figure 10 is the structural representation of APR send-request units provided in an embodiment of the present invention.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is explicitly described
The embodiment of the present invention provides a kind of WLAN communication systems, off line in terminal roaming scene in wlan network for solving
The problem of network transmission performance is limited.
Fig. 4 is the structural representation of WLAN communication systems provided in an embodiment of the present invention.It is provided in an embodiment of the present invention
In WLAN communication systems, including at least two WLAN controllers and at least two AP.Include two in Fig. 4 with WLAN communication systems
Exemplified by WLAN controllers and four AP.As shown in figure 4, the WLAN communication systems that the present embodiment is provided include two WLAN controls
Device, respectively WLAN controllers 42 and WLAN controllers 43, four AP, respectively AP 44, AP 45, AP 46, AP 47.WLAN
Controller 42 and WLAN controllers 43 are connected with gateway 41.WLAN controllers 42 manage AP 44 and AP 45, WLAN controller 43
Manage AP 46 and AP 47.
Gateway is connected with each WLAN controller at least two WLAN controllers, at least two WLAN controllers
Each AP at least one AP in each AP of WLAN controller managements at least two, at least two AP only belongs at least two
A WLAN controller in individual WLAN controllers.AP Home WLAN controllers refer to AP by the WLAN controller managements.
WLAN communication systems provided in an embodiment of the present invention, which are one, has centralized gateway and distributed WLAN controller
Wlan network.Wherein centralized gateway refers to that whole wlan network is only connected with a gateway, and gateway is responsible for whole WLAN nets
Data forwarding in network.Distributed WLAN controller refers to that network includes multiple WLAN controllers, and each WLAN controllers are born
A part of AP in duty management network.
When first terminal is connected with AP 44, during by 44 access networks of AP, first terminal passes through WLAN controllers 42, net
Realize network connection in the path for closing 41.
After first terminal is connected with AP 44, AP 44 will send the first ARP request or first to WLAN controllers 42
RARP (English：Reverse Address Resolution Protocol, RARP) request.First ARP please
Ask or the first RARP asks to be used to make the first WLAN controllers determine that first terminal is connected with the first AP.Wherein, first
ARP request or the first RARP request can the AP 44 when it is determined that first terminal is connected with AP 44 of AP 44 actively send.Can
Replace, the first ARP request or the first RARP requests can also be that first terminal is sent to AP 44, and AP 44 is being received
First terminal send the first ARP request or the first RARP request after, to WLAN controllers 42 forward first ARP request or
The RARP of person the first is asked.
When WLAN controllers 42 can also receive the second ARP request of the transmission of gateway 41, wherein the second ARP request is to use
In the medium access control (English of request second terminal：Media Access Control, MAC) address, WLAN controllers 42
After the user's table for inquiring about itself storage, if the MAC Address for the second terminal that is stored with user's table of itself storage, then WLAN is controlled
Device 42 processed sends the second arp response to gateway 41, and the source MAC of the second arp response is the MAC Address of second terminal.Wherein
Any terminal in the terminal that second terminal is connected for any AP with the management of WLAN controllers 42 in addition to first terminal.That is,
When WLAN controllers 42 receive the second ARP request that the gateway 41 from network side is sent, if second ARP request is to use
The MAC Address of second terminal that AP is connected is managed in request and WLAN controllers 42, then WLAN controllers 42 will be instead of with the
The AP responses of two terminals connection.WLAN controllers 42 check that user's table of itself storage obtains the MAC Address of second terminal, so that
The MAC Address of second terminal is sent to gateway 41.Wherein, storage includes what is managed with WLAN controllers 42 in WLAN controllers 42
The MAC Address of the terminal of AP connections and user's table of IP address.Similarly, in the wlan network of large-scale network-estabilishing, connection
Terminal data is a lot, and ARP request is broadcast transmission, if WLAN controllers 42 are receiving the 2nd ARP from gateway 41
After request, manage AP to it and broadcast the second ARP request, then the second ARP request can be caused to take excessive air interface transmission resource.
And in the present embodiment, because WLAN controllers 42 replace the AP being connected with second terminal to have answered the second ARP request, then will
Avoid above mentioned problem.
Due to only having a gateway in whole network, then the WLAN communication system reals that the present embodiment is provided are one big
Double layer network, belongs to same IP subnets with each WLAN controller managements AP terminals being connected.But because each WLAN controllers are negative
Blame progress generation of the ARP request in the network for managing it to answer, then ARP broadcasting packets will be reduced in the network shown in Fig. 2
Quantity, so as to save transfer resource in network.Similarly, since one big two layers of network is employed, after there is roaming in terminal,
Also the problem of being not in data roundabout to former access gateway.
In summary, in the WLAN communication systems that the present embodiment is provided, centralized gateway and distributed WLAN are employed
The framework of controller.WLAN controllers determine that terminal is connected to self-administered network according to the ARP request from end side.And
It is responsible for carrying out response to the ARP request from network side by WLAN controllers.Address in the response is the ARP from network side
The asked MAC Address of request, being referred to as ARP generations answers.So the answer from network side ARP request will all be concentrated on point
Carried out on the WLAN controllers of cloth, it is to avoid the situation for the excessive air interface transmission resource of occupancy brought to terminal broadcast ARP request.
Therefore, the WLAN communication systems that the present embodiment is provided can be avoided taking to the ARP request of terminal broadcast in network and excessively eated dishes without rice or wine
The situation of transfer resource, so as to improve the transmission performance of network.
Further, in the WLAN communication systems shown in Fig. 4, WLAN controllers 42 receive the first ARP request or
After the RARP of person the first requests, the first arp response can also will be sent to AP 44, the source MAC of the first arp response is gateway
41 MAC Address.That is, when WLAN controllers 42 receive the first ARP request or the first RARP requests of the transmissions of AP 44
Afterwards, the MAC Address using gateway 41 is disguised oneself as the source MAC of the first arp response so that first terminal thinks the first ARP
Response is that gateway 41 is sent.The first ARP request or the first RARP requests that so AP 44 is sent will not be sent to gateway
41, i.e., the ARP requests sent of the AP in respective range of management are acted on behalf of by each WLAN controllers.Because gateway 41 is connected to
Few two WLAN controllers, if the ARP requests sent of AP 44 or RARP requests are all sent to gateway 41, at extensive group
In the WLAN communication systems of net, the ARP request or RARP of being difficult to bear all AP transmissions are asked the pressure brought by gateway 41.
And ARP proxy is carried out by each WLAN controllers, the AP ARP requests sent or RARP requests are replied, then in network
ARP request pressure will be shared by each WLAN controllers in network.
It is responsible for carrying out response, the wherein source MAC in the response to the ARP request from end side by WLAN controllers
For the MAC Address of gateway, proxy ARP is referred to as.Gateway can be avoided to concentrate response ARP request to the pressure of gate performance.
The process performance to the concurrent ARP request of a large number of users in network can be improved, so as to further improve the transmission performance of network.
In the WLAN communication systems shown in Fig. 4, due to there is WLAN controllers 42 to be responsible for carrying out ARP proxy, in WLAN controls
Device 42 processed is received after the first ARP request or the first RARP requests from AP 44, directly using the MAC Address of gateway 41
Carry out agent answers, then gateway 41 will be unable to obtain the ARP information for the first terminal for sending the first ARP request.Due to gateway
41 ARP informations needed also exist in network carry out data forwarding, then receive the first ARP request in WLAN controllers 42
Or the first RARP request after, can also make the following judgment：WLAN controllers 42 judge the first ARP request or the first RARP
Whether the source MAC of request is stored in user's table of WLAN controllers 42.If the first ARP request or the first RARP requests
Source MAC, i.e. the MAC Address of first terminal is not stored in user's table of WLAN controllers 42, then WLAN controllers
42 send the 3rd ARP request or the 3rd RARP requests to gateway 41, and the 3rd ARP request or the 3rd RARP ask to be used to make gateway
Determine that first terminal and the AP of the first WLAN controller managements are connected, wherein the source of the 3rd ARP request or the 3rd RARP requests
MAC Address is the MAC Address of first terminal, makes MAC table and ARP table that the more new gateway 41 of gateway 41 is stored.Or WLAN controls
Device 42 directly can also forward first ARP request or the first RARP to ask to gateway 41, equally can update gateway 41
MAC table and ARP table that gateway 41 is stored.Due to the user's table stored in WLAN controllers 42 be in order to safeguard its management network
The ARP information of each terminal of middle connection, as long as accessing the terminal of WLAN controllers 42, its ARP information can all be stored in WLAN
In user's table of controller 42.So after WLAN controllers 42 receive the first ARP request or the first RARP requests, if hair
The source MAC of existing first ARP request is not stored in user's table of WLAN controllers 42, then WLAN controllers 42 can be recognized
It is to access WLAN controllers 42 first for first terminal.So it be have answered in WLAN controllers 42 using the MAC Address of gateway 41
, it is necessary to which the first ARP request or the first RARP requests are sent to gateway 41 after first ARP request or the first RARP requests,
Gateway 41 is set also to store the ARP information of first terminal, so that gateway 41 updates the MAC table and ARP table of itself storage, so as to
Data in network are forwarded.Certainly, if WLAN controllers 42 judge that the MAC Address of first terminal is not stored in WLAN controls
In user's table of device 42 processed, then WLAN controllers 42 stop forwarding the first ARP request or the first RARP requests to gateway 41.
In the WLAN communication systems described in Fig. 4, when there is the roaming of terminal, i.e. terminal is from a WLAN controller pipe
When the network of another WLAN controller managements is roamed in the network of reason, based on the network architecture described in Fig. 4, in addition it is also necessary in WLAN
The interaction mechanism of signaling is set up between controller so that the administration authority migration flow of terminal is completed between each WLAN controllers.
If as shown in figure 4, with the third terminals being connected of AP 44 be by AP 46 roam through Lai, then WLAN controllers 42 can be received
The 4th ARP request or the 4th RARP requests that AP 44 is sent.With the first ARP request or the first RARP requests similarly, the
Four ARP requests or the 4th RARP ask to be used to make WLAN controllers 42 determine that third terminal is connected with AP 44, and the 4th ARP please
Ask or the 4th RARP request source MAC be third terminal MAC Address.Third terminal is to be managed with WLAN controllers 42
AP connections terminal in any terminal in addition to first terminal and second terminal.Receiving the 4th ARP request or
After four RARP requests, source IP address and source MAC that WLAN controllers 42 can be asked according to the 4th ARP request or the first RARP
Address determines the WLAN controllers for the AP that management third terminal is connected before connection AP 44.Manage connecting for third terminal
The AP connected before AP 44 WLAN controllers, refer to third terminal before the network of the management of WLAN controllers 42 is roamed into
The WLAN controllers of residing network.The ARP for having each WLAN controllers in network in the ARP table that WLAN controllers 42 are safeguarded believes
Breath, then after WLAN controllers 42 receive the 4th ARP request or the 4th RARP requests, you can it is determined that management third terminal
The AP connected before connection AP 44 WLAN controllers.Management third terminal connects before connection AP 44 in the present embodiment
The AP connect WLAN controllers are WLAN controllers 43.So WLAN controllers 42 send management migration to WLAN controllers 43 and asked
Ask.WLAN controllers 43 are received after management migration request, and management migration response, management migration are sent to WLAN controllers 42
Response carries the user right information of third terminal.So as to complete the management migration flow of third terminal.And in third terminal
After the completion of management migration, because the ARP information of third terminal was not stored in user's table of WLAN controllers 42 originally, WLAN controls
Device 42 processed need also exist for gateway 41 send the first ARP request or the first RARP request so that gateway 41 update MAC table and
ARP table, even if gateway 41 knows what third terminal was managed from the netsurfing that WLAN controllers 43 are managed to WLAN controllers 42
Network.
Fig. 5 provides another structural representation of WLAN communication systems for the embodiment of the present invention, as shown in figure 5, the present embodiment
The WLAN communication systems of offer and Fig. 4 difference are that each AP is connected by the network switch and respective WLAN controllers
Connect.In Figure 5, AP 44 is connected by the network switch 51 with WLAN controllers 42, AP 45 by the network switch 52 with
WLAN controllers 42 are connected, and AP 46 is connected by the network switch 53 with WLAN controllers 43, and AP 47 passes through the network switch
54 are connected with WLAN controllers 43.
, can be with fact, between each WLAN controllers and its AP managed in addition to being connected by the network switch
Connected by tunnel.There is the connecting link of physics between the AP that i.e. each WLAN controllers can be managed with it, can also pass through
Logical tunnel is attached.In a word, as long as WLAN controllers can intercept and capture ARP request or the RARP requests of AP transmissions.
Fig. 6 is the flow chart of arp request sender's method embodiment one provided in an embodiment of the present invention, what the present embodiment was provided
Method is applied to the WLAN communication systems as shown in Fig. 4 or Fig. 5, and its executive agent is the first WLAN controllers.As shown in fig. 6,
The method that the present embodiment is provided includes：
Step S601, the first WLAN controllers receive the first ARP request or the first RARP requests that the first AP is sent, the
One ARP request or the first RARP ask to be used to make the first WLAN controllers determine that first terminal is connected with the first AP, the first ARP
The source MAC of request or the first RARP requests is the MAC Address of first terminal, and first terminal is times being connected with the first AP
One terminal, the first AP is the AP of the first WLAN controller managements, and storage includes in the first WLAN controllers and the first WLAN is controlled
The MAC Address and user's table of IP address of the terminal of the AP connections of device management.
Step S602, the first WLAN controllers receive the second ARP request that gateway is sent, and the second ARP request is used to ask
The MAC Address of second terminal, second terminal be remove in the terminal that be connected with the AP of the first WLAN controller managements first terminal it
Outer any terminal, gateway is connected with least two WLAN controllers, and at least two WLAN controllers are controlled including the first WLAN
Device.
After step S603, user's table of the first WLAN controllers inquiry storage the second arp response, second are sent to gateway
The MAC Address carried in arp response is the MAC Address of second terminal.
Wherein, in the present embodiment, the first WLAN controllers can be in the WLAN communication systems shown in Fig. 4 or Fig. 5
WLAN controllers 42 or WLAN controllers 43, when the first WLAN controllers are WLAN controllers 42, the first AP is AP 44 or AP
45, when the first WLAN controllers are WLAN controllers 43, the first AP is AP 46 or AP 47.
Wherein, the first ARP request or the first RARP ask to be the first AP it is determined that first terminal is sent out when being connected with the first AP
Send, or, the first ARP request or the first RARP requests are that the first AP is receiving the first ARP request of first terminal transmission
Or the first RARP ask the forwarding of backward first WLAN controllers.
Fig. 7 is the flow chart of arp request sender's method embodiment two provided in an embodiment of the present invention, what the present embodiment was provided
Method is applied to the WLAN communication systems as shown in Fig. 4 or Fig. 5.As shown in fig. 7, base of the method for the present embodiment offer in Fig. 6
On plinth, in addition to：
Step S701, the first WLAN controllers send the first arp response to the first AP or the first RARP is responded, and first
The source MAC of arp response or the first RARP responses is the MAC Address of gateway.
Fig. 8 is the flow chart of arp request sender's method embodiment three provided in an embodiment of the present invention, what the present embodiment was provided
Method is applied to the WLAN communication systems as shown in Fig. 4 or Fig. 5.As shown in figure 8, base of the method for the present embodiment offer in Fig. 7
On plinth, in addition to：
Step S801, the first WLAN controllers judge whether the MAC Address of first terminal is stored in the first WLAN controllers
User's table in.
Step S801 can be performed after step S601, can also be performed after step S701, also just be said, the first WLAN controls
Device processed can perform step S801, the first WLAN controls after the first ARP request of the first AP transmissions or the first RARP requests is received
Device processed can also perform step S801 when sending the first arp response or the first RARP responses to the first AP.
Step S802, if the MAC Address of first terminal is not stored in user's table of the first WLAN controllers, first
WLAN controllers send the 3rd ARP request to gateway or the 3rd RARP is asked, and the 3rd ARP request or the 3rd RARP ask to be used to make
Gateway determines that the first terminal and the AP of the first WLAN controller managements are connected, the 3rd ARP request or the 3rd RARP request
Source MAC is the MAC Address of the first terminal.
Step S803, if the first ARP request or the source MAC of the first RARP requests are stored in the first WLAN controllers
In user's table, then the first WLAN controllers stop forwarding the first ARP request or the first RARP requests.
Fig. 9 is the flow chart of arp request sender's method example IV provided in an embodiment of the present invention, what the present embodiment was provided
Method is applied to the WLAN communication systems as shown in Fig. 4 or Fig. 5.As shown in figure 9, the method that the present embodiment is provided includes：
Step S901, the first WLAN controllers receive the 4th ARP request or the 4th RARP requests that the first AP is sent, the
Four ARP requests or the 4th RARP ask to be used to make the first WLAN controllers determine that third terminal is connected with the first AP, the 4th ARP
The source MAC of request or the 4th RARP requests is the MAC Address of third terminal, and third terminal is and the first WLAN controllers
Any terminal in the terminal of the AP connections of management in addition to first terminal and second terminal.
Step S902, the first WLAN controllers are according to the 4th ARP request or the 4th the RARP source IP address asked and source
MAC Address determines the WLAN controllers for the AP that management third terminal is connected before the first AP is connected.
Step S903, if the WLAN controllers for the AP that management third terminal is connected before the first AP is connected are the 2nd WLAN
Controller, then the first WLAN controllers are sent to the 2nd WLAN controllers manages migration request, and the 2nd WLAN controllers are management
The WLAN controllers of first terminal, the 2nd WLAN controllers are connected with gateway.
Step S904, the first WLAN controllers migrate response with receiving the management that the 2nd WLAN controllers are sent, and management is moved
Move the user right that response carries third terminal.
In arp request sender's method shown in Fig. 6 to Fig. 9, shown in its implementing principle and technical effect and Fig. 4 or Fig. 5
The WLAN controllers provided in WLAN communication systems are identical, and here is omitted.
Figure 10 is the structural representation of ARP request dispensing device provided in an embodiment of the present invention, the ARP that the present embodiment is provided
Send-request unit is arranged in the first WLAN controllers, and the ARP request dispensing device that the present embodiment is provided includes：
Receiving module 101, for receiving the first ARP request or the first RARP requests that the first AP is sent, the first ARP please
Ask or the first RARP ask be used for the first WLAN controllers is determined that first terminal is connected with the first AP, the first ARP request or
The source MAC of the RARP of person the first requests is the MAC Address of first terminal, and first terminal is any end being connected with the first AP
End, the first AP is the AP of the first WLAN controller managements.
Receiving module 101, is additionally operable to receive the second ARP request that gateway is sent, the second ARP request is used to ask second eventually
The MAC Address at end, second terminal is appointing in addition to first terminal in the terminal being connected with the AP of the first WLAN controller managements
One terminal, gateway is connected with least two WLAN controllers, and at least two WLAN controllers include the first WLAN controllers.
Memory module 102, includes the MAC Address peace talks with the first WLAN controller managements AP terminals being connected for storing
User's table of IP address.
Processing module 103, user's table for inquiring about the storage of memory module 102, determines the MAC Address of second terminal.
Sending module 104, for sending the second arp response to gateway, the MAC Address carried in the second arp response is the
The MAC Address of two terminals.
The ARP request dispensing device that the present embodiment is provided can be arranged at the WLAN controls in Fig. 5 or embodiment illustrated in fig. 6
In device 42.
Further, in embodiment illustrated in fig. 10, sending module 103, be additionally operable to the first AP send the first arp response or
The RARP of person the first is responded, and the source MAC of the first arp response or the first RARP responses is the MAC Address of gateway.
Further, in embodiment illustrated in fig. 10, processing module 103, be additionally operable to judge first terminal MAC Address whether
In the user's table for being stored in the storage of memory module 102；Sending module 104, if the MAC Address for first terminal is not stored in depositing
Store up in user's table that module 102 is stored, then sending the 3rd ARP request or the 3rd RARP to gateway asks, the 3rd ARP request or the
Three RARP are asked for making gateway determine that first terminal and the AP of the first WLAN controller managements are connected, the 3rd ARP request or
The source MAC of three RARP requests is the MAC Address of first terminal.Sending module 104, if if being determined for processing module 103
Source MAC in first ARP request or the first RARP requests is stored in user's table of the first WLAN controllers, then stops turning
Send out the first ARP request message or the first RARP request messages.
Further, in embodiment illustrated in fig. 10, receiving module 101, the 4th ARP for being additionally operable to receive the first AP transmissions please
Ask or the 4th RARP requests, the 4th ARP request or the 4th RARP ask to be used to make the first WLAN controllers determine the 3rd eventually
End is connected with the first AP, and the source MAC of the 4th ARP request or the 4th RARP requests is the MAC Address of third terminal, the 3rd
Terminal is any terminal in addition to first terminal and second terminal in the terminal that is connected with the AP of the first WLAN controller managements；
Processing module 103, with being additionally operable to source IP address and source MAC according to the 4th ARP request message or the 4th RARP request messages
Location determines the WLAN controllers for the AP that management third terminal is connected before the first AP is connected；Sending module 104, if being additionally operable to place
Reason module 104 determines that the WLAN controllers for the AP that management third terminal is connected before the first AP is connected are the 2nd WLAN controls
Device, then send management migration request to the 2nd WLAN controllers, and the 2nd WLAN controllers are management third terminal in connection first
The AP connected before AP WLAN controllers, the 2nd WLAN controllers are connected with gateway；Receiving module 101, is additionally operable to reception
Response is migrated to the management that two WLAN controllers are sent, management migration response carries the user right of third terminal.
The embodiment of the present invention also provides a kind of WLAN controllers, including communication interface, memory and processor.Need explanation
, the communication interface in the embodiment of the present invention can be the communication interface of any wired or wireless way, such as Ethernet
Interface, optical fiber interface etc..Processor can be a central processing unit (Central Processing Unit, CPU), or
It is specific integrated circuit (Application Specific Integrated Circuit, ASIC), or completes to implement this hair
One or more integrated circuits of bright embodiment.Memory is used for the instruction code for storing computing device, and WLAN controls
Various configuration informations and data in device.Processor adjusts memory-aided instruction code, and connecing for data is completed by communication interface
Receive and send, and the data that the data and needs to receiving are sent are handled.
Specifically, processor, for receiving the first ARP request or first that the first AP is sent by communication interface
RARP is asked, and the first ARP request or the first RARP ask to be used to make the first WLAN controllers determine first terminal and the first AP
The source MAC of connection, the first ARP request or the first RARP requests is the MAC Address of first terminal, and first terminal is and the
Any terminal of one AP connections, the first AP is the AP of the first WLAN controller managements；Processor, is additionally operable to connect by communication interface
The second ARP request that gateway is sent is received, the second ARP request is used for the MAC Address for asking second terminal, and second terminal is and first
Any terminal in the terminal of the AP connections of WLAN controller managements in addition to the first terminal, gateway and at least two WLAN
Controller is connected, and at least two WLAN controllers include the first WLAN controllers.
Memory, is additionally operable to storage with including with the MAC Address and IP of the first WLAN controller managements AP terminals being connected
User's table of location.
Processor, is additionally operable to inquire about user's table of memory storage, determines the MAC Address of second terminal；Processor, is also used
In sending the second arp response to gateway by communication interface, the MAC Address carried in the second arp response is the MAC of second terminal
Address.
Further, processor, is additionally operable to send the first arp response or the first RARP to the first AP by communication interface
The source MAC of response, the first arp response or the first RARP responses is the MAC Address of gateway.
Further, processor, is additionally operable to judge whether the MAC Address of first terminal is stored in the user of memory storage
In table；If the MAC Address of first terminal is not stored in user's table of memory storage, sent by communication interface to gateway
3rd ARP request or the 3rd RARP requests, the 3rd ARP request or the 3rd RARP ask to be used for make gateway to determine first terminal and the
MAC of the source MAC of the 3rd ARP request or the 3rd RARP requests for first terminal is stated in the AP connections of one WLAN controller managements
Address.
Further, processor, is additionally operable to receive the 4th ARP request or the 4th that the first AP is sent by communication interface
RARP is asked, and the 4th ARP request or the 4th RARP ask to be used to make the first WLAN controllers determine third terminal and the first AP
The source MAC of connection, the 4th ARP request or the 4th RARP requests is the MAC Address of third terminal, and third terminal is and the
Any terminal in the terminal of the AP connections of one WLAN controller managements in addition to first terminal and second terminal；According to the 4th
The source IP address and source MAC of ARP request message or the 4th RARP request messages determine management third terminal in connection institute
State the AP connected before the first AP WLAN controllers；If processor determines that management third terminal is connected before the first AP is connected
AP WLAN controllers be the 2nd WLAN controllers, then sending management migration to the 2nd WLAN controllers by communication interface please
Ask, the WLAN controllers for the AP that the 2nd WLAN controllers connect for management third terminal before the first AP is connected, the 2nd WLAN
Controller is connected with gateway；Response, management migration are migrated by communication interface with receiving the management that the 2nd WLAN controllers are sent
Response carries the user right of first terminal.
One of ordinary skill in the art will appreciate that：Realizing all or part of step of above-mentioned each method embodiment can lead to
The related hardware of programmed instruction is crossed to complete.Foregoing program can be stored in a computer read/write memory medium.The journey
Sequence upon execution, performs the step of including above-mentioned each method embodiment；And foregoing storage medium includes：Read-only storage (English
Text：Read only memory, ROM), random access memory (English：Random access memory, RAM), magnetic disc or
Person's CD etc. is various can be with the medium of store program codes.
Protection scope of the present invention should be defined by scope of the claims.
Claims (17)
1. a kind of WLAN WLAN communication systems, it is characterised in that including：At least two WLAN controllers and at least two
Access point AP；
The WLAN communication systems are connected with a gateway, wherein the gateway with it is each at least two WLAN controllers
Individual WLAN controllers are connected, at least two AP described in each WLAN controller managements at least two WLAN controllers
At least one AP, only belong at least two WLAN controllers one of each AP at least two AP
WLAN controllers；
At least two WLAN controllers include the first WLAN controllers, and at least two AP includes the first AP, wherein, institute
Stating storage in the AP that the first AP is the first WLAN controller managements, the first WLAN controllers includes and described first
The MAC Address and user's table of Internet protocol IP address of the terminal of the AP connections of WLAN controller managements；
First AP is used for reverse to the first WLAN controllers the first ARP of transmission request or first
Address resolution protocol RARP is asked, and first ARP request or the first RARP ask to be used to control the first WLAN
Device processed determines that the first terminal is connected with the first AP, the source of first ARP request or the first RARP requests
Medium access control MAC Address is the MAC Address of first terminal, and the first terminal is any end being connected with the first AP
End；
The first WLAN controllers are used to receive the second ARP request that the gateway is sent, and second ARP request is used for please
Seek the MAC Address of second terminal, the second terminal is to remove in the terminal being connected with the AP of the first WLAN controller managements
Any terminal outside the first terminal；
The first WLAN controllers are additionally operable to inquire about after user's table to the gateway and send the second arp response, described the
The MAC Address carried in two arp responses is the MAC Address of the second terminal.
2. WLAN communication systems according to claim 1, it is characterised in that the first WLAN controllers are additionally operable to institute
State the first AP and send the first arp response or the first RARP responses, what first arp response or the first RARP were responded
Source MAC is the MAC Address of the gateway.
3. WLAN communication systems according to claim 1 or 2, it is characterised in that the first WLAN controllers are additionally operable to,
After first ARP request or the first RARP requests is received, first ARP request or described first are judged
Whether the source MAC of RARP requests is stored in user's table of the first WLAN controllers；
If first ARP request or the source MAC of the first RARP requests are not stored in the first WLAN controllers
User's table in, then the first WLAN controllers send the 3rd ARP request or the 3rd RARP to the gateway and asked, described the
Three ARP requests or the 3rd RARP ask to be used to make the gateway determine the first terminal and the first WLAN controllers
The AP connections of management, the source MAC of the 3rd ARP request or the 3rd the RARP request is the MAC Address of the first terminal.
4. the WLAN communication systems according to any one of claims 1 to 3, it is characterised in that at least two WLAN controls
Device processed also includes the 2nd WLAN controllers；
The first WLAN controllers are additionally operable to, and receive the 4th ARP request or the 4th RARP requests that the first AP is sent,
4th ARP request or the 4th RARP ask be used for make the first WLAN controllers determine third terminal with it is described
First AP connections, the source MAC of the 4th ARP request or the 4th RARP request is the MAC Address of third terminal,
The third terminal is that the first terminal and described the are removed in the terminal that be connected with the AP of the first WLAN controller managements
Any terminal outside two terminals；
The first WLAN controllers are additionally operable to, after the 4th ARP request or the 4th RARP requests is received, root
Management the described 3rd is determined according to the 4th ARP request or the 4th RARP source IP address asked and source MAC eventually
Hold the AP connected before the first AP is connected WLAN controllers；
If the WLAN controllers for managing the AP that the third terminal is connected before the first AP is connected are the 2nd WLAN
Controller, then the first WLAN controllers to the 2nd WLAN controllers send management migration request；
The first WLAN controllers migrate response, the management migration with receiving the management that the 2nd WLAN controllers are sent
Response carries the user right of the third terminal.
5. the WLAN communication systems according to any one of Claims 1 to 4, it is characterised in that the WLAN controllers and pipe
At least two AP of reason are connected by tunnel.
6. a kind of ARP asks sending method, it is characterised in that including：
First WLAN WLAN controllers receive the first ARP request or the first reverse address that the first access point AP is sent
Analysis protocol RARP is asked, and first ARP request or the first RARP ask to be used to make the first WLAN controllers
Determine that first terminal is connected with the first AP, the source medium access of first ARP request or the first RARP requests
The MAC Address that MAC Address is first terminal is controlled, the first terminal is any terminal being connected with the first AP, described
First AP is the AP of the first WLAN controller managements, and storage includes and the first WLAN in the first WLAN controllers
The MAC Address and user's table of Internet protocol IP address of the terminal of the AP connections of controller management；
The first WLAN controllers receive the second ARP request that gateway is sent, and second ARP request is used to ask second eventually
The MAC Address at end, the second terminal is except described first in the terminal that be connected with the AP of the first WLAN controller managements
Any terminal outside terminal, the gateway is connected with least two WLAN controllers, at least two WLAN controller bags
Include the first WLAN controllers；
After user's table of the first WLAN controllers inquiry storage the second arp response, the 2nd ARP are sent to the gateway
The MAC Address carried in response is the MAC Address of the second terminal.
7. method according to claim 6, it is characterised in that the first WLAN controllers receive that the first AP sends the
After one ARP request or the first RARP requests, in addition to：
The first WLAN controllers send the first arp response to the first AP or the first RARP is responded, the first ARP
The source MAC of response or the first RARP responses is the MAC Address of the gateway.
8. the method according to claim 6 or 7, it is characterised in that the first WLAN controllers receive the first AP and sent
The first ARP request or the first RARP request after, in addition to：
The first WLAN controllers judge whether the MAC Address of the first terminal is stored in the first WLAN controllers
In user's table；
If the MAC Address of the first terminal is not stored in user's table of the first WLAN controllers, described first
WLAN controllers send the 3rd ARP request to the gateway or the 3rd RARP is asked, the 3rd ARP request or the described 3rd
RARP is asked for making the gateway determine that the first terminal and the AP of the first WLAN controller managements are connected, and described
Three ARP requests or the MAC Address that the source MAC of the 3rd RARP requests is the first terminal.
9. the method according to any one of claim 5~8, it is characterised in that also include：
The first WLAN controllers receive the 4th ARP request or the 4th RARP requests that the first AP is sent, and described the
Four ARP requests or the 4th RARP ask to be used to make the first WLAN controllers determine third terminal and the first AP
Connection, the source MAC of the 4th ARP request or the 4th RARP request is the MAC Address of third terminal, described the
Three terminals are except the first terminal and the second terminal in the terminal that be connected with the AP of the first WLAN controller managements
Outside any terminal；
The first WLAN controllers are according to the 4th ARP request or the 4th RARP source IP address asked and source
MAC Address determines the WLAN controllers for the AP that the management third terminal is connected before the first AP is connected；
If the WLAN controllers for managing the AP that the third terminal is connected before the first AP is connected are the 2nd WLAN controls
Device, then the first WLAN controllers are sent to the 2nd WLAN controllers manages migration request, the 2nd WLAN controls
Device is manages the WLAN controllers for the AP that the third terminal is connected before the first AP is connected, and the 2nd WLAN is controlled
Device is connected with the gateway；
The first WLAN controllers migrate response, the management migration with receiving the management that the 2nd WLAN controllers are sent
Response carries the user right of the third terminal.
10. a kind of ARP send-request unit, it is characterised in that the ARP request dispensing device is arranged at
In one WLAN WLAN controllers, the ARP request dispensing device includes：
Receiving module, for receiving the first ARP request or the first RARP that the first access point AP is sent
RARP is asked, and first ARP request or the first RARP ask to be used to make the first WLAN controllers determine first
Terminal is connected with the first AP, the source medium access control MAC of first ARP request or the first RARP requests
Location is the MAC Address of first terminal, and the first terminal is any terminal being connected with the first AP, and the first AP is institute
State the AP of the first WLAN controller managements；
The receiving module, is additionally operable to receive the second ARP request that gateway is sent, second ARP request is used to ask second
The MAC Address of terminal, the second terminal is that described the is removed in the terminal that be connected with the AP of the first WLAN controller managements
Any terminal outside one terminal, the gateway is connected with least two WLAN controllers, at least two WLAN controllers
Including the first WLAN controllers；
Memory module, includes and the MAC Address of the first WLAN controller managements AP terminals being connected and internet for storing
User's table of Protocol IP address；
Processing module, user's table for inquiring about the memory module storage, determines the MAC Address of the second terminal；
Sending module, for sending the second arp response to the gateway, the MAC Address carried in second arp response is institute
State the MAC Address of second terminal.
11. ARP request dispensing device according to claim 10, it is characterised in that the sending module, is additionally operable to institute
State the first AP and send the first arp response or the first RARP responses, what first arp response or the first RARP were responded
Source MAC is the MAC Address of the gateway.
12. the ARP request dispensing device according to claim 10 or 11, it is characterised in that the processing module, is additionally operable to
Judge whether the MAC Address of the first terminal is stored in user's table of the memory module storage；
The sending module, if the MAC Address for the first terminal is not stored in user's table of the memory module storage
In, then send the 3rd ARP request to the gateway or the 3rd RARP is asked, the 3rd ARP request or the 3rd RARP please
Ask for making the gateway determine that the first terminal and the AP of the first WLAN controller managements are connected, the 3rd ARP
The source MAC of request or the 3rd RARP requests is the MAC Address of the first terminal.
13. the ARP request dispensing device according to any one of claim 10~12, it is characterised in that the receiving module,
It is additionally operable to receive the 4th ARP request or the 4th RARP requests that the first AP is sent, the 4th ARP request or described
4th RARP asks to be used to make the first WLAN controllers determine that third terminal is connected with the first AP, the 4th ARP
The source MAC of request or the 4th RARP requests is the MAC Address of third terminal, and the third terminal is and described the
Any terminal in the terminal of the AP connections of one WLAN controller managements in addition to the first terminal and the second terminal；
The processing module, is additionally operable to the source IP according to the 4th ARP request message or the 4th RARP request messages
Address and source MAC determine the WLAN controllers for the AP that the management third terminal is connected before the first AP is connected；
The sending module, determines the management third terminal before the first AP is connected if being additionally operable to the processing module
The AP of connection WLAN controllers are the 2nd WLAN controllers, then send management migration request to the 2nd WLAN controllers,
The WLAN controllers for the AP that the 2nd WLAN controllers connect for the management third terminal before the first AP is connected,
The 2nd WLAN controllers are connected with the gateway；
The receiving module, is additionally operable to migrate response with receiving the management that the 2nd WLAN controllers are sent, the management is moved
Move the user right that response carries the third terminal.
14. a kind of WLAN WLAN controllers, it is characterised in that the WLAN controllers are the first WLAN controllers, institute
Stating the first WLAN controllers includes：Communication interface, processor and memory；
The processor, for receiving the first ARP that the first access point AP is sent by the communication interface
Request or the first RARP RARP requests, first ARP request or the first RARP ask to be used for
The first WLAN controllers are made to determine that first terminal is connected with the first AP, first ARP request or described first
The source medium access control MAC Address of RARP requests is the MAC Address of first terminal, and the first terminal is and the first AP
Any terminal of connection, the first AP is the AP of the first WLAN controller managements；
The processor, is additionally operable to receive the second ARP request that gateway is sent by the communication interface, the 2nd ARP please
The MAC Address for asking second terminal is sought, the second terminal is what is be connected with the AP of the first WLAN controller managements
Any terminal in terminal in addition to the first terminal, the gateway is connected with least two WLAN controllers, it is described at least
Two WLAN controllers include the first WLAN controllers；
Memory, includes the MAC Address with the first WLAN controller managements AP terminals being connected and internet association for storing
Discuss user's table of IP address；
The processor, is additionally operable to inquire about user's table of the memory storage, determines the MAC Address of the second terminal；
The processor, is additionally operable to send the second arp response to the gateway by the communication interface, the 2nd ARP rings
The MAC Address that middle should be carried is the MAC Address of the second terminal.
15. WLAN controllers according to claim 14, it is characterised in that the processor, are additionally operable to by described logical
Believe that interface sends the first arp response to the first AP or the first RARP is responded, first arp response or described first
The source MAC of RARP responses is the MAC Address of the gateway.
16. the WLAN controllers according to claims 14 or 15, it is characterised in that the processor, are additionally operable to judge institute
Whether the MAC Address for stating first terminal is stored in user's table of the memory storage；If the MAC Address of the first terminal
It is not stored in user's table of the memory storage, then the 3rd ARP request is sent to the gateway by the communication interface
Or the 3rd RARP request, the 3rd ARP request or the 3rd RARP ask be used for make the gateway determine it is described first eventually
End is connected with the AP of the first WLAN controller managements, and the source MAC of the 3rd ARP request or the 3rd the RARP request is
The MAC Address of the first terminal.
17. the WLAN controllers according to any one of claim 14~16, it is characterised in that the processor, are additionally operable to
The 4th ARP request or the 4th RARP requests that first AP is sent are received by the communication interface, the 4th ARP please
Ask or the 4th RARP asks to be used to make the first WLAN controllers determine that third terminal is connected with the first AP, institute
The source MAC for stating the 4th ARP request or the 4th RARP requests is the MAC Address of third terminal, the third terminal
In the terminal being connected for the AP with the first WLAN controller managements in addition to the first terminal and the second terminal
Any terminal；According to the 4th ARP request message or the source IP address and source MAC of the 4th RARP request messages
It is determined that managing the WLAN controllers for the AP that the third terminal is connected before the first AP is connected；If the processor is determined
The WLAN controllers for managing the AP that the third terminal is connected before the first AP is connected are the 2nd WLAN controllers, then lead to
Cross the communication interface and send management migration request to the 2nd WLAN controllers, the 2nd WLAN controllers are management institute
State the WLAN controllers for the AP that third terminal is connected before the first AP is connected, the 2nd WLAN controllers and the net
Connection connects；Response is migrated with receiving the management that the 2nd WLAN controllers are sent by the communication interface, the management is moved
Move the user right that response carries the first terminal.
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| CN201610177730.8A CN107231449B (en) | 2016-03-24 | 2016-03-24 | ARP request forwarding method and device and W L AN communication system |
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| CN109548177A (en) * | 2018-12-26 | 2019-03-29 | 成都西加云杉科技有限公司 | A kind of extensive WiFi network management system and method |
| CN109743726A (en) * | 2018-12-05 | 2019-05-10 | 江苏鑫软图无线技术股份有限公司 | The method of static terminal is shared under a kind of LTE system roaming scence |
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