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SCHEDULING CHANNEL CHANGE NOTIFICATION MESSAGE DELIVERING ON MESH NETWORK

IP.com Disclosure Number: IPCOM000244646D
Publication Date: 2016-Jan-04
Document File: 3 page(s) / 56K

Publishing Venue

The IP.com Prior Art Database

Related People

Yuping Wang: AUTHOR [+4]

Abstract

A method is presented herein that allows a Parent AP schedule the proper time slot to send a channel change notification message to Child AP. This method reduces the chances of retransmission and thus improves the mesh convergence performance.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 52% of the total text.

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SCHEDULING CHANNEL CHANGE NOTIFICATION MESSAGE DELIVERING ON MESH NETWORK

AUTHORS:

Yuping Wang Linyu Lu Kevin Fang

Yin Wang

CISCO SYSTEMS, INC.

ABSTRACT

    A method is presented herein that allows a Parent AP schedule the proper time slot to send a channel change notification message to Child AP. This method reduces the chances of retransmission and thus improves the mesh convergence performance.

DETAILED DESCRIPTION

     Wireless mesh is an important technology for industrial users, such as mining, oil etc. In order to identify the exact next best parent wireless access point (AP) to choose in case of parent loss, mesh APs can perform an off-channel "background scanning" needed to scan for new parent APs and therefore detect topology changes. When the parent AP changes frequency due to a more preferable path according to Dynamic Frequency Selection (DFS) or Dynamic Channel Assignment (DCA), etc., this normally triggers a channel change notification mechanism to notify its child AP that it is going to change frequency. There is a possibility that when the parent AP notifies a child AP that channel change is going to occur, the child AP can go off channel for scanning and the notification may not be detected by the child AP, in which case the parent AP would have to do a retransmission in order to ensure the child AP gets notified of the channel change. In such a mesh network that is undergoing reformation, the more notification messages that get lost, the longer it will take for mesh convergence.

    Presented herein is a method that reduces the chances of a notification message getting lost in a mesh network when the parent AP needs to change frequency, thus

Copyright 2016 Cisco Systems, Inc.

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improve mesh convergence performance. Figure 1 below is a generic diagram of a mesh network.

Figure...