User guide

Optimizing Performance
6-11
Alvarion
If these options do not resolve your problem, consider one of the following
options:
! Protocol Filtering on page 6-3
! Optimizing Wired Connections on page 6-5
! Designing High Capacity Networks on page 6-20
RTS/CTS Medium Reservation
It is normal behavior for BreezeNET stations to defer transmissions
automatically when they sense that another wireless device is using the wireless
medium.
This behavior also referred to as the Carrier Sense Multiple Access/Collision
Avoidance protocol (CSMA/CA) will avoid that wireless messages would collide
in situations where two or more stations would start transmissions at the same
time.
The RTS/CTS medium reservation mechanism enables you to improve wireless
performance in network environments where the CSMA/CA protocol would
fail due to the “hidden station” problem as pictured in Figure 6-24.
Figure 6-24: The Hidden Station Problem
RTS/CTS medium reservation may provide a solution for networks where:
! The density of stations and Base Stations is very low.
! You witness poor network performance due to excessive frame collisions at
the Base Stations.
About the Hidden Station Problem
A hidden station is a situation in which two wireless stations are within range of
the same Base Station, but are not within range of each other.
NOTE:
You can also use the Client Manager to analyze the link quality between a remote station
and the Base Station. In that case, you will need to have access to the “problem location”
to do on-site diagnostics.