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This is not as complicated as it sounds and it accomplished by performing a
wireless site survey, which is covered in detail later in this document.
In a multiple access point wireless network, to maximise the bandwidth of the
wireless network, each access point should have a different channel to
access points next to it. This will maximise the speed of the connection to
each access point. For example, if the original access point was on channel 1,
by selecting channel 6 for the second access point the communications are
easily kept separate by the two access points.
Roaming on a wireless LAN can be seen as analogous to roaming between
cells with a mobile or cell phone. The phone will associate itself with a cell,
and once the signal from that cell becomes weak, the phone will search for a
new cell and associate itself with that cell instead. Therefore roaming between
the two cells with no break in connection. This is demonstrated in the wireless
network diagram below.
Channels on access points differ by at least 5
1
1
6
11
11
1
Figure 2: Multiple access points in extended wireless network showing different channels
needed for maximum bandwidth on each access point
Site Survey
This is a method of carrying out a simple, rudimentary Site Survey using the
3Com WLAN Utility software that is shipped with 3Com Wireless NICs.