Cerio OW-215N2-X User Manual page 60

All the radio stations received beacon recognizes the existence of such AP, and may
proceed next actions if the information from AP matches the requirement. Beacon is sent
on a periodic basis, the time interval can be adjusted.
By increasing the beacon interval, you can reduce the number of beacons and associated
overhead, but that will likely delay the association and roaming process because stations
scanning for available access points may miss the beacons. You can decrease the
beacon interval, which increases the rate of beacons. This will make the association and
roaming process very responsive; however, the network will incur additional overhead
and throughput will go down.
DTIM Interval : The DTIM interval is in the range of 1~255. The default is 1.
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DTIM is defined as Delivery Traffic Indication Message. It is used to notify the wireless
stations, which support power saving mode, when to wake up to receive multicast frame.
DTIM is necessary and critical in wireless environment as a mechanism to fulfill
power-saving synchronization.
A DTIM interval is a count of the number of beacon frames that must occur before the
access point sends the buffered multicast frames. For instance, if DTIM Interval is set to
3, then the Wi-Fi clients will expect to receive a multicast frame after receiving three
Beacon frame. The higher DTIM interval will help power saving and possibly decrease
wireless throughput in multicast applications.
RTS Threshold : TRTS Threshold is in the range of 1~2347 byte. The default is 2347
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byte.
The main purpose of enabling RTS by changing RTS threshold is to reduce possible
collisions due to hidden wireless clients. RTS in AP will be enabled automatically if the
packet size is larger than the Threshold value. By default, RTS is disabled in a normal
environment supports non-jumbo frames.
Short Preamble : By default, it's "Enable". To Disable is to use Long 128-bit Preamble
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Synchronization field.
The preamble is used to signal "here is a train of data coming" to the receiver. The short
preamble provides 72-bit Synchronization field to improve WLAN transmission efficiency
with less overhead.
CERIO software core : cen_v3.0