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AirLive WL-5470AP User Manual

Page 26

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AirLive WL_5470AP User’s Manual

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Fragment Threshold value to split the packet. The value can be set from

256 to 2346. The default value is 2346.

RTS Threshold

RTS Threshold is a mechanism implemented to prevent 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. Therefore, they

are hidden nodes for 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.

Thus, the RTS Threshold mechanism provides a solution to prevent data

collisions. When you enable RTS Threshold on a suspect “hidden

station”, this station and its Access Point will use a Request to Send

(RTS). 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 station within its range to

notify all other stations to defer transmission. It will also confirm the

requestor station that the Access Point has reserved it for the

time-frame of the requested transmission.

If the “Hidden Node” problem is an issue, please specify the packet size. The

RTS mechanism will be activated if the data size exceeds the value you set..

The default value is 2347.

Warning: Enabling RTS Threshold will cause redundant network overhead

that could negatively affect the throughput performance instead of providing

a remedy.

This value should remain at its default setting of 2347. Should you encounter

inconsistent data flow, only minor modifications of this value are

recommended.

Beacon Interval

Beacon Interval is the amount of time between beacon transmissions. Before

a station enters power save mode, the station needs the beacon interval to

know when to wake up to receive the beacon (and learn whether there are

buffered frames at the access point).

Data Rate

By default, the unit adaptively selects the highest possible rate for

transmission. Select the basic rates to be used among the following options:

Auto, 1, 2, 5.5, 11or 54 Mbps. For most networks the default setting is Auto

which is the best choice. When Auto is enabled the transmission rate will

select the optimal rate. If obstacles or interference are present, the system will