Compaq WL110 User Manual page 79

The last example would typically occur only in networks where all Access
Points have been configured to operate at the same frequency, or at frequencies
with an insufficient channel separation (see "Frequency Channel Management"
on page 6-13).
Influencing the Deferral Behavior
To overcome the performance issue described on previous pages, you can
choose to design a high performance network based on the following principles:
Add more Access Points to your network.
Configure Access Points in neighboring cells to operate at different
frequency channels with a maximum channel separation (see "Frequency
Channel Management" on page 6-13).
Adjust the
number of wireless stations per Access Point (see "Distance Between APs"
on page 8-3).
CAUTION:Distance between APs is a parameter that must be set on both the
wireless stations and the Access Point. The values that you select
must be the same for ALL 11Mbps Wireless LAN equipped devices
in your network to avoid unpredictable behavior of your network
and the roaming connectivity of wireless devices.
By changing the
you can virtually reduce the receiver sensitivity of the wireless radios, that will
show the following behavior:
The stations will show a more active roaming behavior and connect to one
of the added Access Points more quickly.
Considering the fact that you have added more Access Points, the deferral
behavior does no longer need to be as strict in environments where the
density of installed Access Points was fairly low:
— The stations will only defer transmissions when the signal level of a
message sensed on the wireless medium equals or exceeds a specific
level.
— Messages with a low signal level are not likely to be addressed at the
Access Point that services the local cell, since the more active roaming
behavior should have caused the station to connect to another Access
Point.
To support the more active roaming behavior of the wireless stations and to
compensate the lower receiver sensitivity, changing the Distance between APs
parameter should correspond with the actual increase of and more dense
placement of your Access Points.
The examples listed on the following pages will illustrate the effect of the
various Distance between APs configurations.
In Figure 6-8 you see the standard configuration of networks, where
parameter has been set to
between APs
Distance Between APs
Distance between APs
parameter to optimize the load balance of the
parameter from
.
Large
to or
Large Medium
Distance
Optimizing Performance
,
Small
6-19