If you wish to make your beacon most efficient, choose a prime number from this list:
•1-2 wireless clients: 197 199 211 223 227 229 233 239 241
•3-5 wireless clients: 149 151 157 163 167 173 179 181 191 193
•6+ wireless clients: 97 101 103 107 109 113 127 131 137 139
The beacon is the rhythm of your AP-controlled network. It performs that function far more frequently than its other famous purpose: to help your network appear in a scan of available wireless networks. The beacon occurs several times a second to perform both of these tasks.
Each channel has a theoretical bandwidth (e.g. 11 Mbps, 54 Mbps).
Each time the beacon transmits, the length of the beacon transmission takes from the available bandwidth of the channel.
If you decrease the time between beacons by too much (reduce the beacon interval), the available bandwidth can become consumed by the increased number of beacons -- which do not contribute to the throughput of your network. And if you only have a couple of wireless clients on your network, most of the beacons will go unanswered because none of your clients have any traffic for the AP.
If you increase the time between beacons by too much (raise the beacon interval), it creates periods of "dead air" as a client holding traffic waits for a beacon. And, if you have multiple stations competing for the attention of the AP, a wide interval between beacons makes it more likely that more than one station will attempt to contact the AP at the same time.
Adjusting the beacon interval to suit your network may increase your bandwidth by balancing the need to open windows for data while avoiding collisions.
Choosing from among a list of prime numbers makes it less likely that your beacons will chirp in sync with the beacons of other networks. Since beacons can collide as well, it makes sense to choose an interval that is unlikely to align with neighboring networks for very long.--
Robb Topolski http://www.funchords.com/ Hillsboro, Oregon USA
...Cherish ugly children, they are less likely to be kidnapped...