BeWAN AP54, User Manual, Page: 33 / 40

BeWAN Wi-Fi AP54 33
Transmission rates:
Basic transmission speed must be set according to the speed of your wireless network. Transfer
speed can be set between 1 Mbps and 54 Mbps.
RTS/CTS:
This is a specific channel control technique using call packet exchange. This technique can be
activated or deactivated.
Before sending a data packet, the source station sends a special RTS call packet to its destination. If
the packet is received correctly by the destination station, it responds with a CTS packet. If the
source station receives this packet correctly, it can take control at the end of the CTS transmission
and send its data packet. If received correctly, the destination station confirms that the packet has
been correctly forwarded to its recipient. If there is a failure in the transmission of the RTS or CTS
or no delivery receipt is received, the entire procedure must be restarted.
Beacon Interval:
When a station wants to access an existing wireless network (following start-up, standby or simply
by entering the cell geographically), the station trying to connect requires synchronisation
information from the Access Point. The station simply waits to receive a beacon frame. The beacon
frame is a frame sent periodically by the Access Point to synchronise the wireless network. This
section allows the time interval to be determined between each beacon.
RTS Threshold:
This field allows you to specify the size of the packet which is used to invoke the RTS/CTS
mechanism, governing the packet exchange. It should be noted that each station can set a different
level. RTS/CTS adds a "handshake" before each transmission of packets to ensure the channel is
free. This increases performance levels in the event of hidden nodes or a large number of active
nodes. Enter a value between 256 et 2432. It is preferable to keep the default value.
Fragmentation Threshold:
This field is used to specify the fragmentation level over which packets are to be fragmented.
Fragmentation allows an IP packet to be broken down into a series of smaller fragments. This
parameter sets the maximum fragmentation size. Select a value between 256 and 2346. It is
preferable to keep the default value. If the fragmentation level is too low, performance will be
affected.
DTIM Interval:
This value represents the DTIM ( D elivery T raffic I ndication M essage ) message interval. A DTIM
zone is a count zone informing customers of the following window for listening to diffusion and
multidiffusion messages. When the Access Point has recorded diffusion or multidiffusion messages
in its buffer memory for associated clients, it sends the following DTIM with an interval of DTIM.
The Access Point’s clients hear the beacon signals and wake up to receive the diffusion and
multidiffusion messages.