User Manual

Advanced WaveLAN Parameters
Medium Reservation
WaveLAN IEEE 802.11 PC Card User’s Guide 4-9
Figure 4-4 The Hidden Station Problem
When Station B starts to communicate with the WavePOINT-II
access point, it might not notice that Station A is already using the
wireless medium. When Station A and Station B send messages at
the same time, they might collide when arriving simultaneously at
the WavePOINT-II access point. The collision will most certainly
result in a loss of messages for both stations.
In situations as pictured Figure 4-4, Medium Reservation may
provide a solution to prevent message collisions by handing over
transmission control to the WavePOINT-II access point.
Troubleshooting a “Hidden Station” problem usually provides the
best results when it is performed on the suspected WaveLAN
Client stations that suffer from errors as a result of the “hidden
station” problem.
When configuring the WaveLAN card parameters (in the PC Card
properties window) you can set the Medium Reservation
parameter to either:
■ “Hidden Station”, or
■ “Off”