Zoom ZoomAir USB Client - Manual (Page 27)

Chapter 4 Advanced Features 27
Power Management— The Power Save option is designed to
conserve your computer’s battery life. If you click the Power Save,
your wireless LAN Card will go into sleep mode, minimizing power
consumption.
Note: If you enable power saving, the Access Points you use
need to support power saving as well—otherwise
communication cannot be established.
RTS Threshold— RTS Threshold is intended to prevent the
problem of “Hidden Nodes.” Hidden Nodes involve two stations
that are within range of the same Access Point, but are not within
range of each other—they cannot hear each other. When one
station begins transmitting data via the Access Point, it might not
notice that the other station is already active. When these two
stations send data at the same time, they may collide when arriving
at the Access Point. Such collisions result in a loss of messages for
both stations.
Click Enable to use RTS Threshold on a suspect hidden station.
The station and its Access Point will then use a Request to
Send/Clear to Send protocol (RTS/CTS). The station will send an
RTS to the Access Point, informing that it is going to transmit data.
On receipt, the Access Point responds with a CTS message to all
stations within range, notifying them to defer transmission.