CN104363158A

CN104363158A - Method, device and system for transmitting data by CAPWAP tunnel

Info

Publication number: CN104363158A
Application number: CN201410652954.0A
Authority: CN
Inventors: 王茂斌; 左延麟; 罗晟
Original assignee: Comba Telecom Systems China Ltd
Current assignee: Comba Network Systems Co Ltd
Priority date: 2014-11-17
Filing date: 2014-11-17
Publication date: 2015-02-18

Abstract

The invention relates to the technical field of wireless communication, in particular to a method, device and system for transmitting data by a CAPWAP tunnel. The method, device and system are used for solving the problem that an existing WLAN architecture can not flexibly expand the network coverage area due to the wiring problem of cables. The method for transmitting data by the CAPWAP tunnel comprises the steps that after a first WTP receives first data from an STA, the first data are subjected to format conversion and encapsulation to obtain a first data package, and the first data package is forwarded to a second WTP; after the first WTP receives a second data package from the second WTP, the second data package is subjected to CAPWAP de-encapsulation to obtain second data, and the second data are processed. According to the technical scheme, the problem that in the prior art, the existing WLAN architecture can not flexibly expand the network coverage area due to the various difficulties for wiring the cables are solved.

Description

A kind of methods, devices and systems of CAPWAP tunnel transmission data

Technical field

The present invention relates to wireless communication technology field, particularly a kind of methods, devices and systems of CAPWAP tunnel transmission data.

Background technology

Since IEEE802.11 standard in 1997 proposes, the standards such as IEEE802.11a, IEEE802.11b, IEEE802.11g also propose in succession, greatly promote WLAN (Wireless Local Area Networks, WLAN) development, WLAN is made to be no longer only supplementing of cable network, but gradually to the future development of large scale deployment and independence networking, even instead of cable network in some places.

In prior art, the access of WLAN uses thin access point architecture usually, as shown in Figure 1, WTP (Wireless Transmission point, wireless terminal access point) and AC (Wireless Access Point Controller, access controller) between connected by wire cable, and set up CAPWAP (Control And Provisioning of Wireless Access Points Protocol Specification, the control of WAP (wireless access point) and specification) tunnel transmitting control information and data message, WTP and STA (Station, stand) between connected by wireless network.

Specifically, on the up direction of CAPWAP tunnel, the data message of STA carries out CAPWAP encapsulation through WTP, is delivered to AC by CAPWAP tunnel, carries out concentrating forwarding at AC; On the down direction of CAPWAP tunnel, the data message received is carried out CAPWAP encapsulation by AC, is transmitted to WTP by CAPWAP tunnel, carry out CAPWAP decapsulation by WTP and be distributed to WTP association STA.And under the networking model connected by wire cable between AC and STA, wire cable needs to extend to STA institute's cloth region, could realize the management of AC to access user.In existing network, because the wiring of wire cable exists all difficulties, reduce the scope that wireless network covers.

In sum, current WLAN architecture cannot realize the coverage expanding network neatly.

Summary of the invention

The invention provides a kind of CAPWAP tunnel transmission method of data and device, there is WLAN architecture cannot meet large-scale network-estabilishing needs of problems in order to solve in prior art.

Embodiments provide the method for a kind of CAPWAP tunnel transmission data, comprising:

One WTP receive from first data of STA after, described first data are carried out format conversion and encapsulation obtains the first packet, and described first packet are transmitted to the 2nd WTP;

A described WTP, after receiving the second packet from described 2nd WTP, carries out CAPWAP decapsulation to described second packet and obtains the second data, and processes described second data.

Because the present invention adds a WTP, when the Fit-Repeater pattern of unlatching the one WTP, on uplink, make the first data received from STA can carry out format conversion and CAPWAP encapsulation at a WTP, on the uplink, after receiving the second packet from the 2nd WTP, the second data are obtained through CAPWAP decapsulation, and respective handling is carried out to it, compared with CAPWAP encapsulation or decapsulation can only being carried out with prior art data on the WTP connected by wire cable with AC like this, data can carry out CAPWAP encapsulation or decapsulation process at a WTP i.e. wireless side, and be wireless connections between a WTP and the 2nd WTP, without the need to wiring, be easy to the coverage of extended wireless network, thus solve the existing WLAN architecture that causes because the wiring of wire cable there are all difficulties in prior art cannot the problem of expanding coverage area of network neatly.

Preferably, described first packet is transmitted to the 2nd WTP by a described WTP, comprising:

Described first packet is transmitted to the VAP port of the 2nd WTP by a described WTP by WIFI port;

A described WTP receives the second packet from described 2nd WTP, comprising:

One WTP is by second packet of VAP port accepts from the WIFI port of described 2nd WTP.

Because described first packet to be transmitted to the VAP end of the 2nd WTP or a WTP by second packet of VAP port accepts from the WIFI port of described 2nd WTP by WIFI port by a WTP, make a WTP and the 2nd WTP can send data wirelessly.

Preferably, be wired connection or wireless connections between a described WTP and described STA.

Preferably, between a described WTP and described STA be wireless connections;

Described data are carried out format conversion to a described WTP and encapsulation obtains the first packet, comprising:

Described first data are converted to the data of 802.3 protocol formats by a described WTP, and the data after conversion are carried out CAPWAP encapsulation, the packet that encapsulation obtains are carried out the conversion of 802.11 protocol formats, obtain described first packet.

During owing to being wireless connections between a WTP and STA, the data from STA that one WTP receives are the data of 802.11 protocol formats, and CAPWAP encapsulates the data of support 802.3 protocol format, therefore the form first the first data being converted to 802.3 agreements is needed to carry out CAPWAP encapsulation, and between a WTP and the 2nd WTP, be wireless connections, and the form of packet after CAPWAP encapsulation is still the form of 802.3 agreements, therefore the form being again converted into 802.11 agreements is needed, thus realize the smooth transmission of the first packet between a WTP and STA.

Preferably, be wired connection between a described WTP and described STA;

Described first data are carried out CAPWAP encapsulation by a described WTP, the packet that encapsulation obtains are carried out the conversion of 802.11 protocol formats, obtain described first packet.

During owing to being wired connection between a WTP and STA, the data from STA that one WTP receives are the data of 802.3 protocol formats, namely the data of CAPWAP encapsulation format are supported, therefore, it is possible to directly to its encapsulation, and between a WTP and the 2nd WTP, be wireless connections, and the form of packet after CAPWAP encapsulation is still the form of 802.3 agreements, therefore need the form being again converted into 802.11 agreements, thus realize the smooth transmission of the first packet between a WTP and STA.

Preferably, a described WTP processes described second data, comprising:

If described second data are management datas, described second data are sent to upper strata by a described WTP;

If described second data are not management datas, described second data are sent to STA by a described WTP.

2nd WTP receive from a WTP after CAPWAP encapsulates the first packet obtained, by described first Packet Generation to AC;

Described 2nd WTP receive from AC after CAPWAP encapsulates the second packet obtained, send to a described WTP.

Owing to adding a WTP, wirelessly be connected with a WTP by the 2nd WTP, on uplink, at a WTP first packet after CAPWAP encapsulation with format conversion, wirelessly can be sent to the 2nd WTP, and then be forwarded to AC; On the uplink, 2nd WTP is by forwarding the second packet of encapsulating through CAPWAP at AC to a WTP, the encapsulation of such data can realize in wireless side and first order CAPWAP, that is STA can by access the one CAPWAP and then access of radio network, without the need to wiring, be easy to the coverage of extended wireless network, avoid with prior art because the wiring of wire cable exists all difficulties and the existing WLAN architecture caused cannot the problem of expanding coverage area of network neatly.

Preferably, described second wireless access point device WTP receive from the first wireless access point device WTP after CAPWAP encapsulates the first packet obtained, before sending to access controller AC, also comprise:

If between a described WTP from described 2nd WTP link host-host protocol form and between a described WTP and described AC link the form of host-host protocol different, then described first packet is converted to the form being adapted at transmitting between a described WTP and described AC link by described 2nd WTP;

Described 2nd WTP receive from AC after CAPWAP encapsulates the second packet obtained, before being transmitted to a described WTP, also comprise:

If between a described WTP from described 2nd WTP link host-host protocol form and between a described WTP and described AC link the form of host-host protocol different, then described second packet is converted to the form being adapted at transmitting between described 2nd WTP and a described WTP link by described 2nd WTP.

Preferably, between a described WTP and described 2nd WTP link, the form of host-host protocol is the form of 802.11 agreements;

Between a described WTP and above-mentioned AC link, the form of host-host protocol is the form of 802.3 agreements.

Preferably, described 2nd WTP judges whether to receive the first packet according to following manner:

Described 2nd WTP containing after CAPWAP head, determines that the data received are described first packet in the data received.

Preferably, the method also comprises:

Described 2nd WTP not containing after CAPWAP head, processes receiving data, and sends to AC in the data determining to receive.

Owing to not containing CAPWAP head in the data that the 2nd WTP receives, then these data encapsulate without CAPWAP, and the first packet is sent to the 2nd WTP at a WTP through CAPWAP encapsulation, illustrate that data that the second level receives are from the STA associated with the 2nd WTP, therefore need to carry out encapsulating or just sending to AC after format conversion at the 2nd WTP.

Preferably, described 2nd WTP will receive before the second packet is transmitted to a described WTP, also comprise:

The object IP address that described 2nd WTP determines in described second packet in CAPWAP field is the IP address of a WTP.

Due to the IP address that the object IP address in CAPWAP field in the second packet is a WTP, then illustrate that the second packet is transmitted to a WTP by the 2nd WTP.

Preferably, described 2nd WTP receives encapsulating after the second packet obtained through CAPWAP from AC, also comprises:

If the object IP address in described second packet in CAPWAP field is the IP address of the 2nd WTP, then described 2nd WTP is to the described second packet decapsulation received, row relax of going forward side by side;

If the object IP address in described second packet in CAPWAP field is the IP address of the STA be connected with the 2nd WTP, then described 2nd WTP is to the described second packet decapsulation received, and the STA sending to described IP address corresponding.

The embodiment of the present invention additionally provides the device of a kind of CAPWAP tunnel transmission data, comprising:

First processing unit, for receive from first data of STA after, described first data are carried out format conversion and encapsulation obtains the first packet, and described first packet are transmitted to the 2nd WTP;

Second processing unit, for after receiving the second packet from described 2nd WTP, carries out CAPWAP decapsulation to described second packet and obtains the second data, and process described second data.

Preferably, described first processing unit also for:

By WIFI port, described first packet is transmitted to the VAP port of the 2nd WTP;

Described second processing unit also for:

By second packet of VAP port accepts from the WIFI port of described 2nd WTP.

Preferably, between described WTP and described STA be wired connection or wireless connections.

Preferably, for wireless connections between described WTP and described STA, described first processing unit also for:

Described first data are converted to the data of 802.3 protocol formats, the data after conversion are carried out CAPWAP encapsulation, the packet that encapsulation obtains is carried out the conversion of 802.11 protocol formats, obtain described first packet.

Preferably, be wired connection between described WTP and described STA, then described first processing unit also for:

Described first data are carried out CAPWAP encapsulation, the packet that encapsulation obtains is carried out the conversion of 802.11 protocol formats, obtain described first packet.

Preferably, described second level processing unit also for:

If described second data are management datas, described second data are sent to upper strata;

If described second data are not management datas, described second data are sent to STA.

3rd processing unit, for receive from a WTP after CAPWAP encapsulates the first packet obtained, described first packet is transmitted to access controller AC;

Fourth processing unit, for receive from AC after CAPWAP encapsulates the second packet obtained, be transmitted to a described WTP.

Preferably, described 3rd processing unit also for: receive from the first wireless access point device WTP after CAPWAP encapsulates the first packet obtained, before sending to access controller AC, if between a described WTP from described 2nd WTP link host-host protocol form and between a described WTP and described AC link the form of host-host protocol different, then described first packet is converted to the form being adapted at transmitting between a described WTP and described AC link;

Described fourth processing unit, also for receive from AC after CAPWAP encapsulates the second packet obtained, before sending to a described WTP, if between a described WTP from described 2nd WTP link host-host protocol form and between a described WTP and described AC link the form of host-host protocol different, then described second packet is converted to the form being adapted at transmitting between described 2nd WTP and a described WTP link.

Preferably, described 3rd processing unit also for: judge whether to receive the first packet according to following manner:

Containing after CAPWAP head in the data received, determine that the data received are described first packet.

Preferably, described 3rd processing unit also for: not containing after CAPWAP head in the data determining to receive, process receiving data, and send to AC.

Preferably, described fourth processing unit will receive the second packet and be transmitted to a described WTP after being also the IP address of a WTP for: the object IP address determining in described second packet in CAPWAP field.

Preferably, described fourth processing unit also for:

Receive encapsulating after the second packet obtained through CAPWAP from AC, if the object IP address in described second packet in CAPWAP field is the IP address of the 2nd WTP, to the described second packet decapsulation received, row relax of going forward side by side; If the object IP address in described second packet in CAPWAP field is the IP address of the STA be connected with the 2nd WTP, to the described second packet decapsulation received, and the STA sending to described IP address corresponding.

In addition, the embodiment of the present invention additionally provide a kind of CAPWAP tunnel transmission data system comprise:

One WTP, for receive from first data of STA after, described first data are carried out format conversion and encapsulation obtains the first packet, and described first packet are transmitted to the 2nd WTP; After receiving the second packet from described 2nd WTP, CAPWAP decapsulation is carried out to described second packet and obtains the second data, and described second data are processed;

2nd WTP, for receive from a WTP after CAPWAP encapsulates the first packet obtained, described first packet is transmitted to AC; Receive from AC after CAPWAP encapsulates the second packet obtained, be transmitted to a described WTP.

Accompanying drawing explanation

Fig. 1 is the thin access point structures of WLAN in background technology;

Fig. 2 is the framework networking schematic diagram of the CAPWAP tunnel transmission data of the embodiment of the present invention;

Fig. 3 is the method flow diagram of the embodiment of the present invention one CAPWAP tunnel transmission data;

Fig. 4 is the method flow diagram of the embodiment of the present invention two CAPWAP tunnel transmission data;

Fig. 5 is the method flow diagram of the embodiment of the present invention according to the framework networking CAPWAP tunnel uplink transmission data of Fig. 2;

Fig. 6 is the method flow diagram of the embodiment of the present invention according to the framework networking CAPWAP tunnel downlink transmission data of Fig. 2;

Fig. 7 is the schematic diagram of the device of the CAPWAP tunnel transmission data of the embodiment of the present invention three;

Fig. 8 is the schematic diagram of the device of the CAPWAP tunnel transmission data of the embodiment of the present invention four;

Fig. 9 is the schematic diagram of the system of the CAPWAP tunnel transmission data of the embodiment of the present invention five.

Embodiment

The embodiment of the present invention the one WTP receive from first data of STA after, first data are carried out format conversion and encapsulation obtains the first packet, and the first packet is transmitted to the 2nd WTP, one WTP is after receiving the second packet from the 2nd WTP, CAPWAP decapsulation is carried out to the second packet and obtains the second data, and the second data are processed.This technical scheme can carry out a WTP of CAPWAP encapsulation or decapsulation process in wireless side to data owing to adding, and be wireless connections between a WTP and the 2nd WTP, without the need to wiring, be easy to the coverage of extended wireless network, thus solving the existing WLAN architecture that causes because the wiring of wire cable there are all difficulties in prior art cannot the problem of expanding coverage area of network neatly.

As shown in Figure 2, be the framework networking schematic diagram of CAPWAP tunnel transmission data of the present invention.Wherein, AC and WTP1, WTP2, WTP3, WTP4 are connected by wire cable, wireless connections are passed through, in addition for WTP11, WTP12 of WTP1, WTP1 and wireless side, WTP can also connect STA, as WTP1 in Fig. 2 can by wireless connections STA111 and STA112, WTP2 by wireless connections STA21 by wireless connections STA11, WTP11, WTP3 passes through wireless connections STA41 by wireless connections STA31, WTP4.In framework networking of the present invention, be that the WTP of representative is by opening Fit-Repeater pattern with WTP11, with the WTP1 wireless connections of upper level, CAPWAP tunnel is formed between AC and WTP11, data from STA can be transmitted in CAPWAP tunnel, and achieve the management of AC to STA, WTP in such framework by increasing wireless side just can realize the expansion of network coverage, and the wiring problem do not related in networking, be easy to the expansion realizing network coverage, and in existing WLAN architectural framework, as shown in Figure 1, for WTP1, CAPWAP tunnel is formed between AC and WTP1, can only realize by increasing WTP when extension of network, and AC and WTP is wire cable connection, thus result in bring because of difficult wiring cannot the problem of expanding coverage area of network.

Below in conjunction with Figure of description, the embodiment of the present invention is described in further detail.

As shown in Figure 3, the method for the embodiment of the present invention one CAPWAP tunnel transmission data, comprising:

Uplink data transmission: step 300, a WTP receive from first data of STA after, the first data are carried out format conversion and encapsulation obtains the first packet, and the first packet are transmitted to the 2nd WTP;

Downlink transmission: step 301, a WTP, after receiving the second packet from the 2nd WTP, carries out CAPWAP decapsulation to the second packet and obtains the second data, and process the second data.

It should be noted that between step 300 and step 301, there is no inevitable sequential relationship, trigger to perform which step according to the difference of the packet received.Such as when receiving the first data, perform step 300; When receiving the second packet, perform step 301.

By increasing by a WTP, when the Fit-Repeater pattern of unlatching the one WTP, data like this from client can carry out CAPWAP encapsulation at a wireless side i.e. WTP, then AC is transferred to by CAPWAP tunnel (path of the data packet transmission namely after CAPWAP encapsulation), AC sends the data to client by CAPWAP tunnel, realize the management to client, compared with CAPWAP encapsulation or decapsulation can only being carried out with prior art data on the WTP connected by wire cable with AC, make data can carry out CAPWAP encapsulation or decapsulation process at a WTP i.e. wireless side, and be wireless connections between a WTP and the 2nd WTP, without the need to wiring, be easy to the coverage of extended network, thus solving the existing WLAN architecture that causes because the wiring of wire cable there are all difficulties in prior art cannot the problem of expanding coverage area of network neatly.

Due to when CAPWAP tunnel transmission data, be divided into two kinds of situations, situation one: uplink data transmission; Situation two: downlink transmission.Be described respectively below.

Situation one, uplink data transmission:

Preferably, a described WTP receive from first data of STA after, the first data are carried out before format conversion and encapsulation obtain the first packet, judge these data whether from the management data that a STA or WTP and AC is mutual.

If WTP and AC interactive maintenance data, then do not process, directly give the 2nd WTP by data retransmission;

If from first data of STA, then the first data are carried out format conversion and encapsulation obtains the first packet, and the first packet is transmitted to the 2nd WTP.

Described first packet is transmitted to VAP (Virtual Access Point, the virtual access point) port of the 2nd WTP by WIFI (Wireless Fidelity, Wireless Fidelity) port by a described WTP;

One WTP is connected with the VAP port of the 2nd WTP by WIFI port, and the cipher mode using 802.11 agreements to specify transmits the first packet between a WTP and the 2nd WTP;

Be wireless connections between mode one, a described WTP and described STA:

Time between one WTP and STA for wireless connections, the data from STA that one WTP receives are the data of 802.11 protocol formats, and CAPWAP encapsulates the data of support 802.3 protocol format, therefore the form first the first data being converted to 802.3 agreements is needed to carry out CAPWAP encapsulation, and between a WTP and the 2nd WTP, be wireless connections, and the form of packet after CAPWAP encapsulation is still the form of 802.3 agreements, therefore need the form being again converted into 802.11 agreements.

Be wired connection between mode two, a described WTP and described STA;

When being wired connection between the one WTP and STA, the data from STA that one WTP receives are the data of 802.3 protocol formats, namely the data of CAPWAP encapsulation format are supported, therefore, it is possible to directly to its encapsulation, and between a WTP and the 2nd WTP, be wireless connections, and the form of packet after CAPWAP encapsulation is still the form of 802.3 agreements, therefore need the form being again converted into 802.11 agreements.

Situation two, downlink transmission:

Preferably, a described WTP receives the second packet from described 2nd WTP, comprising:

In the downlink, a WTP is connected with the WIFI port of the 2nd WTP by VAP port, and the same cipher mode using 802.11 agreements to specify transmits the second packet between a WTP and the 2nd WTP.

Preferably, a described WTP processes described second data, comprising:

If the second data management data that to be AC mutual, then a WTP sends it to upper strata and application layer software, if the second data are not management datas, then for sending to the data of the STA associated with a WTP, then sends it to the STA associated with a WTP.

As shown in Figure 4, the method for the embodiment of the present invention two CAPWAP tunnel transmission data, comprising:

Uplink data transmission: step 400, the 2nd WTP receive from a WTP after CAPWAP encapsulates the first packet obtained, the first packet is transmitted to AC;

Downlink transmission: step 401, the 2nd WTP receive from AC after CAPWAP encapsulates the second packet obtained, be transmitted to a WTP.

It should be noted that between step 400 and step 401, there is no inevitable sequential relationship, trigger to perform which step according to the difference of the packet received.Such as specifically, when receiving the first packet, perform step 400; When receiving the second packet, perform step 401.

By increasing by a WTP, and the 2nd WTP is wirelessly connected with a WTP, on uplink, at a WTP first packet after CAPWAP encapsulation with format conversion, wirelessly can be sent to the 2nd WTP, and then be forwarded to AC; On the uplink, 2nd WTP is by forwarding the second packet of encapsulating through CAPWAP at AC to a WTP, the encapsulation of such data can realize in wireless side and first order CAPWAP, that is STA can by access the one CAPWAP and then access of radio network, without the need to wiring, avoiding the existing WLAN architecture that causes because the wiring of wire cable there are all difficulties with prior art cannot the problem of expanding coverage area of network neatly.

Situation one, uplink data transmission:

If containing CAPWAP head in the data that the 2nd WTP receives, then these data are through CAPWAP and encapsulate the packet obtained, be the first packet through CAPWAP encapsulation in a WTP.

Preferably, described 2nd WTP judges whether to receive the first packet according to following manner, also comprises:

If not containing CAPWAP head in the data that the 2nd WTP receives, then these data encapsulate without CAPWAP, and the first packet is sent to the 2nd WTP at a WTP through CAPWAP encapsulation, illustrate that data that the second level receives are from the STA associated with the 2nd WTP, therefore need to carry out encapsulating or just sending to AC after format conversion at the 2nd WTP.

If between a described WTP from described 2nd WTP link host-host protocol form and between a described WTP and described AC link the form of host-host protocol different, then described first packet is converted to the form being adapted at transmitting between a described WTP and described AC link by described 2nd WTP.

This is due to the mode for wireless connections between a WTP and the 2nd WTP, its first packet is the form of 802.11 agreements after being forwarded to the 2nd WTP, and the connected mode between the 2nd WTP and AC link is wired connection, therefore the form transmitting data is the form of 802.3 agreements, therefore, after needing that the first packet is carried out corresponding format conversion, be forwarded to AC.

Especially, if the connected mode of the link connected mode between a WTP with the 2nd WTP and the link between the 2nd WTP and AC is identical, then without the need to carrying out format conversion.

Situation two, downlink transmission:

If the object IP address in the second packet in CAPWAP field is the IP address of a WTP, then illustrate that the second packet is transmitted to a WTP by the 2nd WTP.

When the IP address that the object IP address in CAPWAP field in the second packet is the 2nd WTP, then described 2nd WTP is to the described second packet decapsulation received, and row relax of going forward side by side, namely sends the data after the second packet decapsulation; Its data transmission flow is consistent with process of transmitting of the prior art; Data after decapsulation are normal data packet, directly forward by being driven into bridge.

Preferably, described 2nd WTP receive from AC after CAPWAP encapsulates the second packet obtained, before being transmitted to a described WTP, also comprise:

This is due to the mode for wired connection between AC and the 2nd WTP, its second packet is the form of 802.3 agreements after being forwarded to the 2nd WTP, and the connected mode between a WTP and the 2nd WTP link is wireless connections, therefore the form transmitting data is the form of 802.11 agreements, therefore, after needing that the second packet is carried out corresponding format conversion, be forwarded to AC.

As shown in Figure 5, the embodiment of the present invention, according to the method for the framework networking CAPWAP tunnel uplink transmission data of Fig. 2, comprising:

Step 500, WTP11 opens Fit-Repeater pattern, to be held by WIFI1 mouth and associate, and the cipher mode using 802.11 agreements to specify carries out transfer of data between WTP11 and WTP1 as STA end with the VAP of WTP1.

Step 501, STA111 transfers data to WTP11 by wired or wireless mode.

Step 502, WTP11 judges that whether the data received are the mutual management datas of WTP11 and AC; If so, then step 508 is performed; Otherwise, perform step 503.

Step 503, WTP11 carries out format conversion and encapsulation process to the data received, and sends to WTP1.

After step 504, WTP1 receive data, judge whether these data are the packets sent by WTP11; If so, then step 505 is performed; Otherwise, then step 506 is performed.

Step 505, WTP1 carry out 802.3 protocol format conversions by the packet received, and perform step 507.

The setting that step 506, WTP1 hold according to the VAP of WTP1, carries out CAPWAP encapsulation to receiving data.

Concrete, if the data that WTP1 receives are not the packets sent by WTP11, be then likely the data of holding the STA associated to send with the VAP of WTP1.

Step 507, by WTP1, packet is transmitted to AC, and jumps out this flow process.

Step 508, WTP11 do not process these data, and perform step 504.

As shown in Figure 6, the embodiment of the present invention, according to the method for the framework networking CAPWAP tunnel downlink transmission data of Fig. 2, comprising:

Step 600, WTP1 receive and to be sent by AC and through the packet of CAPWAP encapsulation, and judge that whether this packet is the packet of the STA sending to the packet of WTP1 by AC or send to WTP1 to associate by AC; If so, then step 601 is performed; Otherwise, then step 602 is performed.

Wherein, judging that whether packet that WTP1 receives is the packet of the STA sending to the packet of WTP1 by AC or send to WTP1 to associate by AC, is carry out judging according to the object IP address in CAPWAP field.

The packet decapsulation that step 601, WTP1 receive it, then processes accordingly, and jumps out this flow process.

Step 602, WTP1 convert this packet to 802.11 protocol formats, are transmitted to WTP11.

After step 603, WTP11 receive packet, according to corresponding configuration, carry out CAPWAP decapsulation, and judge it is carry out processing or send to the STA associated with WTP11 at WTP11, and jump out this flow process.

Based on same inventive concept, device and the system of a kind of CAPWAP tunnel transmission data is additionally provided in the embodiment of the present invention, due to the method that the embodiment of the present invention CAPWAP tunnel transmission device of data and method corresponding to system are CAPWAP tunnel transmission data, therefore the enforcement of embodiment of the present invention device see the enforcement of method, can repeat part and repeats no more.

As shown in Figure 7, the device of the CAPWAP tunnel transmission data of the embodiment of the present invention three comprises:

First processing unit 700, for receive from first data of STA after, described first data are carried out format conversion and encapsulation obtains the first packet, and described first packet are transmitted to the 2nd WTP;

Second processing unit 701, for after receiving the second packet from described 2nd WTP, carries out CAPWAP decapsulation to described second packet and obtains the second data, and process described second data.

Preferably, described first processing unit 700 also for:

Described second processing unit 701 also for:

By second packet of VAP port accepts from the WIFI port of described 2nd WTP.

Preferably, for wireless connections between described WTP and described STA, described first processing unit 700 also for:

Preferably, be wired connection between described WTP and described STA, then described first processing unit 700 also for:

Preferably, described second level processing unit 701 also for:

As shown in Figure 8, the device of the embodiment of the present invention four CAPWAP tunnel transmission data, comprising:

3rd processing unit 800, for receive from a WTP after CAPWAP encapsulates the first packet obtained, by described first Packet Generation to AC;

Fourth processing unit 801, for receive from AC after CAPWAP encapsulates the second packet obtained, send to a described WTP.

Preferably, described 3rd processing unit 800 also for: receive from the first wireless access point device WTP after CAPWAP encapsulates the first packet obtained, before sending to access controller AC, if between a described WTP from described 2nd WTP link host-host protocol form and between a described WTP and described AC link the form of host-host protocol different, then described first packet is converted to the form being adapted at transmitting between a described WTP and described AC link;

Described fourth processing unit 801, also for receive from AC after CAPWAP encapsulates the second packet obtained, before sending to a described WTP, if between a described WTP from described 2nd WTP link host-host protocol form and between a described WTP and described AC link the form of host-host protocol different, then described second packet is converted to the form being adapted at transmitting between described 2nd WTP and a described WTP link.

Preferably, described 3rd processing unit 800 also for: judge whether to receive the first packet according to following manner:

Preferably, described 3rd processing unit 800 also for: not containing after CAPWAP head in the data determining to receive, process receiving data, and send to AC.

Preferably, described fourth processing unit 801 will receive the second packet and be transmitted to a described WTP after being also the IP address of a WTP for: the object IP address determining in described second packet in CAPWAP field.

Preferably, described fourth processing unit 801 also for:

In addition, as shown in Figure 9, the system of the embodiment of the present invention five CAPWAP tunnel transmission data comprises: a WTP10 and the 2nd WTP20.

One WTP10, for receive from first data of STA after, described first data are carried out format conversion and encapsulation obtains the first packet, and described first packet are transmitted to the 2nd WTP; After receiving the second packet from described 2nd WTP, CAPWAP decapsulation is carried out to described second packet and obtains the second data, and described second data are processed;

2nd WTP20, for receive from a WTP after CAPWAP encapsulates the first packet obtained, described first packet is transmitted to AC; Receive from AC after CAPWAP encapsulates the second packet obtained, be transmitted to a described WTP.

It can be seen from the above: the CAPWAP tunnel transmission data method of the embodiment of the present invention, by increasing by a WTP, when the Fit-Repeater pattern of unlatching the one WTP, one WTP receive from first data of STA after, first data are carried out format conversion and encapsulation obtains the first packet, and the first packet is transmitted to the 2nd WTP, after one WTP receives the second packet from the 2nd WTP, CAPWAP decapsulation is carried out to the second packet and obtains the second data, and the second data are processed.This technical scheme can carry out a WTP of CAPWAP encapsulation or decapsulation process in wireless side to data owing to adding, and be wireless connections between a WTP and the 2nd WTP, without the need to wiring, be easy to the coverage of extended wireless network, thus solving the existing WLAN architecture that causes because the wiring of wire cable there are all difficulties in prior art cannot the problem of expanding coverage area of network neatly.

Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code.

The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.

Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.

Claims

1. the control of WAP (wireless access point) and a method for specification CAPWAP tunnel transmission data, it is characterized in that, the method comprises:

Described first data, after the first data from station STA received, are carried out format conversion and encapsulation obtains the first packet, and described first packet are transmitted to the second wireless access point device WTP by the first wireless access point device WTP;

2. the method for claim 1, is characterized in that, described first packet is transmitted to the 2nd WTP by a described WTP, comprising:

Described first packet is transmitted to the virtual access point VAP port of the 2nd WTP by a described WTP by Wireless Fidelity WIFI port;

A described WTP receives the second packet from described 2nd WTP, comprising:

3. the method for claim 1, is characterized in that, is wired connection or wireless connections between a described WTP and described STA.

4. method as claimed in claim 3, is characterized in that, is wireless connections between a described WTP and described STA;

5. method as claimed in claim 3, it is characterized in that, be wired connection between a described WTP and described STA;

6. the method for claim 1, is characterized in that, a described WTP processes described second data, comprising:

7. the control of WAP (wireless access point) and a method for specification CAPWAP tunnel transmission data, it is characterized in that, the method comprises:

Second wireless access point device WTP receive from the first wireless access point device WTP after CAPWAP encapsulates the first packet obtained, by described first Packet Generation to access controller AC;

8. method as claimed in claim 7, is characterized in that, described second wireless access point device WTP receive from the first wireless access point device WTP after CAPWAP encapsulates the first packet obtained, before sending to access controller AC, also comprise:

Described 2nd WTP receive from AC after CAPWAP encapsulates the second packet obtained, before sending to a described WTP, also comprise:

9. method as claimed in claim 8, it is characterized in that, between a described WTP and described 2nd WTP link, the form of host-host protocol is the form of 802.11 agreements;

10. method as claimed in claim 7, it is characterized in that, described 2nd WTP judges whether to receive the first packet according to following manner:

11. methods as claimed in claim 8, it is characterized in that, the method also comprises:

12. methods as claimed in claim 7, is characterized in that, described 2nd WTP will receive the second Packet Generation to before a described WTP, also comprise:

Described 2nd WTP determines that between the object network in described second packet in CAPWAP field, interconnected Protocol IP address is the IP address of a WTP.

13. methods as claimed in claim 10, is characterized in that, described 2nd WTP receives encapsulating after the second packet obtained through CAPWAP from AC, also comprises:

The wireless access point device WTP of the control of 14. 1 kinds of WAP (wireless access point) and specification CAPWAP tunnel transmission data, it is characterized in that, this device of described WTP comprises:

Described first data, for after the first data from station STA received, are carried out format conversion and encapsulation obtains the first packet, and described first packet are transmitted to the 2nd WTP by the first processing unit;

15. WTP as claimed in claim 14, is characterized in that, described first processing unit also for:

By Wireless Fidelity WIFI port, described first packet is transmitted to the virtual access point VAP port of the 2nd WTP;

Described second processing unit also for:

By second packet of VAP port accepts from the WIFI port of described 2nd WTP.

16. WTP as claimed in claim 14, it is characterized in that, be wired connection or wireless connections between described WTP and described STA.

17. WTP as claimed in claim 16, is characterized in that, for wireless connections between described WTP and described STA, described first processing unit also for:

18. WTP as claimed in claim 16, it is characterized in that, be wired connection between described WTP and described STA, then described first processing unit also for:

19. WTP as claimed in claim 14, is characterized in that, described second level processing unit also for:

The wireless access point device WTP of the control of 20. 1 kinds of WAP (wireless access point) and specification CAPWAP tunnel transmission data, it is characterized in that, this WTP comprises:

3rd processing unit, for receive from a WTP after CAPWAP encapsulates the first packet obtained, by described first Packet Generation to access controller AC;

Fourth processing unit, for receive from AC after CAPWAP encapsulates the second packet obtained, send to a described WTP.

21. WTP as claimed in claim 20, it is characterized in that, described 3rd processing unit also for: receive from the first wireless access point device WTP after CAPWAP encapsulates the first packet obtained, before sending to access controller AC, if between a described WTP from described 2nd WTP link host-host protocol form and between a described WTP and described AC link the form of host-host protocol different, then described first packet is converted to the form being adapted at transmitting between a described WTP and described AC link;

22. WTP as claimed in claim 20, is characterized in that, described 3rd processing unit also for, judge whether to receive the first packet according to following manner:

23. WTP as claimed in claim 20, is characterized in that, described 3rd processing unit also for:

Not containing after CAPWAP head in the data determining to receive, process receiving data, and send to AC.

24. WTP as claimed in claim 20, is characterized in that, described fourth processing unit also for:

Determine that Protocol IP address interconnected between the object network in described second packet in CAPWAP field is behind the IP address of a WTP, the second packet will be received and be transmitted to a described WTP.

25. WTP as claimed in claim 24, is characterized in that, described fourth processing unit also for:

The system of the control of 26. 1 kinds of WAP (wireless access point) and specification CAPWAP tunnel transmission data, is characterized in that, the system of described CAPWAP tunnel transmission data comprises:

Described first data, for after the first data from station STA received, are carried out format conversion and encapsulation obtains the first packet, and described first packet are transmitted to the 2nd WTP by the first wireless access point device WTP; After receiving the second packet from described 2nd WTP, CAPWAP decapsulation is carried out to described second packet and obtains the second data, and described second data are processed;

2nd WTP, for receive from a WTP after CAPWAP encapsulates the first packet obtained, described first packet is transmitted to access controller AC; Receive from AC after CAPWAP encapsulates the second packet obtained, be transmitted to a described WTP.