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Method for treating connection between AP and AC, AP, computer software product and device

A processing method and connection establishment technology, applied in the field of APs, can solve the problems of unicast discovery process failure, inefficiency, time-consuming, etc., and achieve the effect of reducing the time for APs to discover ACs, improving efficiency, and reducing processing load.

Active Publication Date: 2011-05-18
HEWLETT-PACKARD ENTERPRISE DEV LP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] In view of the timeout control algorithm defined by the CAPWAP protocol, the AP discovers that the AC process may be time-consuming, and it will take a long time for the network to enter the state of providing access services to users, which is inefficient;
[0015] At the same time, in the subsequent unicast discovery process, the domain name parameter must be configured on the DHCP server side. If there is no configuration or the configuration is wrong, the unicast discovery process will fail.

Method used

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  • Method for treating connection between AP and AC, AP, computer software product and device
  • Method for treating connection between AP and AC, AP, computer software product and device
  • Method for treating connection between AP and AC, AP, computer software product and device

Examples

Experimental program
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Effect test

no. 1 example

[0079] In this embodiment, the AC information broadcast message including AC information is a newly defined message.

[0080] Meanwhile, in this embodiment, only the AC information of the currently connected AC is broadcast to the outside world as an example for illustration.

[0081] The 802.11 protocol defines as image 3 The format of the management message shown (the figure does not draw corresponding proportions according to the length of each part, but only shows its structure).

[0082] At the same time, the 802.11 protocol provides a way to extend the protocol message, which uses Element ID to represent the extended element, and uses Information to carry the specific content of the element, such as Figure 4 shown, where:

[0083] The 802.11 protocol reserves the Element ID within the range of 32-255, and the present invention expands and carries AC information within this range.

[0084] Suppose we choose Element ID 254, Length=8, and the Information field includes...

no. 2 example

[0113] In the first embodiment of the present invention, the AC information broadcast message including AC information is a newly defined message, and in this embodiment, the AC information broadcast message is an extension of the existing Beacon message, and the AC information is broadcast through extended Beacon packets.

[0114] Beacon packets are a type of management packets. The message will be sent periodically through the air interface of the AP, carrying the services provided by the AP, authentication and other parameters, and these parameters are carried in the Frame body.

[0115] In the second embodiment of the present invention, the extended Beacon message also includes on the basis of the existing Beacon message:

[0116] AC Address, namely the IP address of the AC;

[0117] AP Number, that is, the number of APs currently connected to the AC; and

[0118] Station Number, that is, the number of wireless users currently connected to the AC.

no. 3 example

[0120] In the first embodiment of the present invention, the AC information broadcast message including AC information is a newly defined message, and in this embodiment, the AC information broadcast message is an extension of the existing Probe message, and the AC information is broadcast through extended Probe packets.

[0121] In the third embodiment of the present invention, the extended Probe message also includes on the basis of the existing Probe message:

[0122] AC Address, namely the IP address of the AC;

[0123] AP Number, that is, the number of APs currently connected to the AC; and

[0124] Station Number, that is, the number of wireless users currently connected to the AC.

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PUM

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Abstract

The method comprises: 1) after first access point (AP) is powered on, it gets the information of access controller (AC) from the second AP; 2) the first AP builds the connection with the AC. The invention reduces the processing load between AC and network and the time of AP to find AC.

Description

technical field [0001] The present invention relates to an AP (Access Point, access point) in a WLAN (Wireless Local Area Network, wireless local area network), in particular to a method for an AP to discover an AC (Access Controller, access controller) and an AP applying the method. Background technique [0002] The 802.11 WLAN network provides a wireless connection service for a local area network. AP is a wireless transceiver device in a wireless local area network, which is used to convert data received from a wired network (such as the Internet) into wireless signals for transmission, and convert the received wireless signals into data and forward them to the wired network. [0003] In response to the needs of enterprise users, the Internet Engineering Task Force (IETF) established a special CAPWAP (Configuration and Provisioning for Wireless Access Points, wireless access point configuration and maintenance) working group to formulate the CAPWAP protocol draft. The CA...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06H04L29/12H04L12/28
Inventor 史杨张海涛汪昊
Owner HEWLETT-PACKARD ENTERPRISE DEV LP