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Seamless channel change in a wireless local area network

A wireless area network and channel technology, applied in the field of wireless area network, can solve the problem of inefficiency of wireless media

Inactive Publication Date: 2007-08-15
INTERDIGITAL TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This would create a situation where an AP would not need to transmit and retransmit frames to STAs that did not follow the AP to the new channel, the number of frames buffered in the AP could be huge and would result in a very inefficient wireless medium, which is Due to the exponential growth of the setback window regarding multiple retransmissions
[0008] 3) The STA confirms that it has followed the AP to the new channel, which creates similar inefficiencies as above

Method used

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  • Seamless channel change in a wireless local area network
  • Seamless channel change in a wireless local area network
  • Seamless channel change in a wireless local area network

Examples

Experimental program
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Embodiment

[0051] A method for seamless channel change in a WLAN with a STA and an AP, the steps of which include: sending a channel change intention message from the AP to the STA; sending a channel change response message from the STA to the AP , inform the AP whether the STA will follow the channel change; determine at the AP whether to perform a channel change; and if the determination result is yes, perform a channel change.

[0052] The method of the preceding paragraph, wherein the channel change response message includes an acknowledgment that the channel change intent message was received.

[0053] According to the method described in one of the preceding two paragraphs, wherein the executing step further includes the following steps: sending a channel change notification message to the STA by the AP; changing the channel on the AP and the STA; and sending by the STA A channel change execution message to the AP upon successful execution of the channel change.

[0054] The metho...

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Abstract

A method for seamless channel change in a wireless local area network having a station STA (204) and an access point AP (202) begins with sending a channel change intention message from the AP to STA (210). A channel change response message (212) is sent from STA to the AP, informing the AP whether the STA will follow the channel change. The AP determines whether to proceed with the channel change, and performs the change if the determination is positive.

Description

technical field [0001] The present invention relates to a wireless local area network (WLAN), and more particularly, the present invention relates to a method for seamless channel change in a WLAN. Background technique [0002] In a WLAN system operating in infrastructure mode, an Access Point (AP) connected to a Basic Service Set (BSS) typically has one or more Stations (STAs) connected to it. The AP and its associated STAs communicate with each other by sending and receiving packets on a given channel. When the channel is congested (that is, the traffic displayed on the channel is high), a BSS node is required. Use less congested channels. Likewise, it is desirable and required that the BSS nodes use a different channel if that channel is subject to interference from outside the system, which is common on unlicensed bands. [0003] The most typical way for BSSs to change channels is that the AP changes the channel on which it transmits all frames (management, control, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q7/00
Inventor 安吉罗・卡费洛克里斯多福・凯夫保罗・马里内尔文森特・罗伊
Owner INTERDIGITAL TECH CORP
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