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Capwap tunnel data transmission method, device and system

A data transmission method and tunneling technology, applied in the field of wireless communication systems, can solve problems such as occupying system processing resources and reducing equipment throughput

Inactive Publication Date: 2016-04-13
COMBA TELECOM SYST CHINA LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, the embodiment of the present invention provides a data transmission method, device and system of a CAPWAP tunnel, which is used to solve the problem of subcontracting a CAPWAP data packet whose data packet length exceeds the MTU in the existing CAPWAP tunnel technology. Due to the large amount of data added in the header of the CAPWAP data packet, the CAPWAP data packet after transmission will occupy additional system processing resources and reduce the throughput of the device.

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  • Capwap tunnel data transmission method, device and system
  • Capwap tunnel data transmission method, device and system

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Embodiment 1

[0032] figure 2 It shows the working flow diagram of the data transmission method of the CAPWAP tunnel provided by the embodiment of the present invention, the method is applied in WTP, and the method includes:

[0033] Step 201, after the WTP establishes a CAPWAP tunnel with the AC, the WTP receives the uplink data packets from the STAs at each site, learns the address information of the headers of the uplink data packets of each STA, and records the correspondence between the address information of each STA and the STA ID , sending the recorded correspondence to the AC through the CAPWAP tunnel;

[0034] Specifically, in a specific application process, for the current STA, in a flooding operation triggered by the WTP, the WTP extracts the address information of the header of the uplink data packet of the current STA, and records the corresponding relationship between the address information of each STA and the STA ID, Send the recorded correspondence to the AC through the ...

Embodiment 2

[0052] Figure 4 It shows the working flow diagram of the data transmission method of the CAPWAP tunnel provided by the embodiment of the present invention, the method is applied in WTP, and the method includes:

[0053] Step 401, the WTP receives the downlink data packet from the AC through the CAPWAP tunnel; wherein, the downlink data packet is based on the address information of the STA in the header of the downlink data packet and the pre-recorded correspondence between the address information of the STA and the STA identity, Determine the STA identifier corresponding to the address information of the STA in the downlink data packet, replace the address information of the STA in the header of the downlink data packet with proxy address information, and send the STA identifier to the WTP after the head of the downlink data packet carries the STA identifier, the proxy In the address information, the source address information is the address information of the AC, and the des...

Embodiment 3

[0068] Figure 6 It shows the working flow chart of the data transmission method of the CAPWAP tunnel provided by the embodiment of the present invention. The method is applied in the AC, and the method includes:

[0069] Step 601, after the AC establishes the CAPWAP tunnel with the WTP, the AC receives and records the correspondence between the address information of each STA from the WTP and the STA identifier through the CAPWAP tunnel;

[0070]Specifically, in a specific application process, after receiving the correspondence, the AC triggers a flooding operation, and in the triggered flooding operation, records the received correspondence between the address information of each STA and the STA identifier;

[0071] Preferably, after the AC receives the corresponding relationship, according to the order of the pointers of the source IP address or the destination IP address in the address information of each STA, the source IP address or the destination IP address in the addr...

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Abstract

The invention discloses a method, device and system for transmitting data of a CAPWAP tunnel. The method, device and system is used for solving the problems that in an existing CAPWAP tunnel technology, after CAPWAP data packages with the data package length larger than that of an MTU are subpackaged, the CAPWAP data packages occupy extra system processing resources, and the throughout capacity of equipment is lowered. According to the method, device and system for transmitting the data of the CAPWAP tunnel, a WTP establishes the corresponding relation of STA address information and an STA identification and sends the corresponding relation to an AC, the WTP replaces the address information of the head portion of an uplink data package by proxy address information, the STA identification is carried on the head portion of the uplink data package, after the AC receives the uplink data package, the STA address information corresponding to the STA identification is determined according to the corresponding relation, the proxy address information of the head portion of the uplink data package is replaced by the determined STA address information, the STA address information carried in the uplink data package is removed, and extra data package length can not be generated.

Description

technical field [0001] The present invention relates to a wireless communication system, in particular to a data transmission method, device and system for a Control and Provision for Wireless Access Point Protocol (CAPWAP, Control and Provision for Wireless Access Point Protocol) tunnel. Background technique [0002] CAPWAP is a tunnel applied between a thin wireless access point (WTP, WirelessTerminalPoint) and an access controller (AC, AccessControl). The CAPWAP protocol defines how to communicate between WTP and AC, and implements WTP and AC The interoperability between provides a common encapsulation and transmission mechanism. [0003] figure 1 It shows the structure of the WLAN composed of the thin WTP and the AC. The WTP accesses the station (STA, Station) in a wireless manner, and the WTP and the AC communicate through a wired CAPWAP. Specifically, a CAPWAP control tunnel is established between the WTP and the AC, and configuration parameters such as software vers...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/46H04L29/12
Inventor 王茂斌左延麟赖远萱张海泉
Owner COMBA TELECOM SYST CHINA LTD