WLAN Book.com and @WLANBook

Wireless Network Performance – Channel Planning

An important component of wireless network performance optimization is channel planning.

IEEE defines 14 channels available for use in 802.11b and 802.11g wireless networks. In the US and Canada the available channels for use are 1 (2.401 GHz) through 11 (2.448 GHz). Outside the US channels 13 and 14 are also available for use. Each of the 11 channels are 5 MHz apart and each defined frequency is the center of a 22 MHz wide channel. This leaves only 3 non-overlapping channels 1 (2.401-2.423 GHz), 6 (2.426-2.448 GHz), and 11 (2.451-2.473 GHz).

Using a low cost 2.4 GHz spectrum analyzer , a visual representation of the 3 non-overlapping channels is shown below. A red shaded box that is 22 MHz wide is centered at channels 1, 6, 11.

(Data collected at a T-Mobile hotspot)

Wireless Network Performance   Channel Planning

The above three non-overlapping channels (1, 6, 11) can be deployed using the cell layout below. This scenario maximizes channel reuse and minimizes interference from adjacent access points.

Wireless Network Performance   Channel Planning

Enterprises usually deploy high end managed wireless LAN networks, that have RF management features for automating channel planning.

Home and small business users will have to manually configure access points for design above if they are deploying several access points or are in an environment with other neighboring access points.

If you liked this post, subscribe using below

WLAN Book RSS Feed

RSS Email WLAN Book by Email

.

Filed under: WLAN Design

One Response to “Wireless Network Performance – Channel Planning”

  1. […] a previous post, a well known non-overlapping channel deployment configuration for 2.4 GHz 802.11 networks was […]