User guide
6-14
BreezeNET DS.11b User’s Guide
Manual Version 1.0
! When a message is shorter than the RTS/CTS medium reservation
threshold, the Base Station will not initiate an RTS to the addressed station,
but use the CSMA/CA protocol: i.e. it will immediately transmit the
message when it senses that the medium is free.
! When the length of a message exceeds the RTS/CTS medium reservation
threshold, the Base Station will first send an RTS to the addressed station
and defer transmission until the addressed station has responded with a
CTS message.
All other stations will defer their transmissions for the duration of the
“radio-silence time” identified in the CTS message.
Enabling RTS/CTS Medium Reservation
1. Start the AP Manager program, select the Base Station that services the
wireless cell where you suspect poor performance caused by a hidden
station problem and click the
Edit button.
2. Select the
Wireless Interfaces tab.
3. Choose the socket that contains the network interface that suffers from a
hidden station.
4. Click the
Advanced button.
The PC Card supports multiple sub-channels. A pull-down menu will appear
allowing you to select a different operating frequency. The number of channels
is subject to local regulations.
1. Click the
RTS/CTS Medium Reservation check box.
2. In the
Threshold field, enter a value in the range of 0 to 2347.
By default, the RTS/CTS medium reservation threshold is 2347 (disabled)
which means that RTS/CTS will not be used.
! In a network using RTS/CTS medium reservation, a typical setting for
the medium reservation threshold is 500.
! Alternatively enter a value of your choice.
The value you enter here will determine when the Base Station will issue a
Request to Send (RTS). For example, if the value you select is 500:
! The Base Station will send use the RTS/CTS protocol for each message
that exceeds the length of 500.
! Messages with a length that is shorter than 500, will be transmitted
according to the standard CSMA/CA protocol.
3. Click
OK to return to the Interface tab.
4. Click
OK again to save the new configuration to the Base Station and to
return to the main AP Manager window.