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Wireless Networks

Notes
Figure 2.1: AP in a Wireless Network

Source: http://www.dummies.com/how-to/content/wireless-network-routing-with-multiple-access-poin.html
Ignoring signal loss from building materials, if you have three APs in your layout and no outside
interference, you should use all three of the non-overlapping channels (1, 6, and 11). The only
exception to this would be if you had a more linear layout, where the APs at either end of the line
were isolated by the middle AP.
A typical pattern may give you a layout that resembles what is shown. Cisco recommends a
10–15 percent overlap between APs to allow complete coverage in the interim area, 15–20 percent
for VOIP solutions.

Figure 2.2: AP Pattern in a Wireless Network

Source: http://www.dummies.com/how-to/content/wireless-network-routing-with-multiple-access-poin.html
This deployment would be more complex if you had to provide coverage using four APs. In
that case, you would have to reuse at least one of the non-overlapping channels to complete the
deployment. You can do that by isolating the AP with the reused channel from the other AP
(which is using the same channel) by having stronger signals from the intermediary APs separate
them.
Staggering these AP channels allows you to provide coverage on all your network APs. An
example of this is shown, where the two APs on channel 6 are separated by the combined signals
from the APs on channels 1 and 11.

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