Browse Prior Art Database

Autonomic Reconfiguration of Access Point for Performance Optimization

IP.com Disclosure Number: IPCOM000019784D
Original Publication Date: 2003-Sep-29
Included in the Prior Art Database: 2003-Sep-29
Document File: 2 page(s) / 32K

Publishing Venue

IBM

Abstract

Wireless LAN's have multiple non overlapping channels (3 for 802.11b and 12 for 802.11a). This allows multiple clients to transmit concurrently on separate channels. However each access point is set to one particular channel, by the LAN administrator when the WAP is installed. The installer would determine channel selection by physical location of each access point to avoid maximize spatial capacity. Typically, access points near each other are assigned different channels to best maximize concurrent bandwidth.

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Autonomic Reconfiguration of Access Point for Performance Optimization

   Wireless LAN's have multiple non overlapping channels (3 for 802.11b and 12 for 802.11a). This allows multiple clients to transmit concurrently on separate channels. However each access point is set to one particular channel, by the LAN administrator when the WAP is installed. The installer would determine channel selection by physical location of each access point to avoid maximize spatial capacity. Typically, access points near each other are assigned different channels to best maximize concurrent bandwidth.

However in practice, there access point channel assignment is not optimized. This is due to the complexity and expense of a site survey, various groups in adjacent regions setting up access point, or LAN administrators adding access points without taking into account current floor plan. During recent performance testing, PCD realized that IGS missed assigned access points in 201 and 061. Our invention is a solution to allow access points to change their fixed channel based on current usage to best maximize concurrent bandwidth, while saving the cost and delay incurred by a full site survey.

The first step in this process is to check to see what other access points are available by scanning for available access points similar to how a wireless client connects to the wireless LAN. The access point only needs awareness of nearby access points as a client must be able to connect to either access point to make this invention work.

Algorithm Flow:

Repeat below in policy set time intervals

1) Presence of addition access points? No --> stay on current channel as clients within thi...