ZyAIR 100 Wireless PC Card
The Power Save function is only supported in the
Infrastructure Network Type is supported in upcoming firmware upgrades. Please
contact your reseller for the most recent firmware.
RTS ThresholdThe RTS Threshold prevents the Hidden Node problem. Hidden Node is a situation in which two stations are within range of the same Access Point, but are not within range of each other. The following figure illustrates an example of the Hidden Node problem. Both stations (STA) are within range of the Access Point, however, they cannot hear each other. Therefore, they are considered hidden nodes from each other. When a station starts data transmission with the Access Point, it might not notice that the other station is already using the wireless medium. When these two stations send data at the same time, they might collide when arriving simultaneously at the Access Point. The collision will most certainly result in a loss of messages for both stations.
FigureThus, the RTS Threshold mechanism provides a solution to prevent data collisions. When you enable RTS Threshold on a possible hidden station, this station and its Access Point will 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 the data. Upon receipt, the Access Point will respond with a CTS message to all stations within its range to notify all other stations to defer transmission. It will also confirm with the requesting station that the Access Point has reserved it for the time frame of the requested transmission.
Normally, the Disable option (default) is selected when you are not concerned with the Hidden Node problem. When the Hidden Node problem becomes an issue, please select Enable and specify the packet size. The RTS function will be activated if the packet size exceeds the value you set. It is highly recommended that you set the value ranging from 0 to 2432.
Parameter Configuration |