Understanding Ieee 802.11B Wireless Communication - Watchguard Firebox SOHO 6 Wireless User Manual

Chapter 1: Introduction
Wireless
The approximate operating range of the SOHO 6 Wireless
when operated indoors:
30.48 meters (100 feet) at 11 Mbps
50.292 meters (165 feet) at 5.5 Mbps
70.104 (230 feet) at 2 Mbps
91.44 (300 feet) at 1 Mbps
Understanding IEEE 802.11b Wireless
Communication
Maximum data rate
The following equation is used to determine the maximum data
rate:
ChannelCapacity
This equation shows that the channel capacity (bits/s) is
determined by:
• The Channel bandwidth: 22 Mbits/s for 802.11b
• The Signal strength: 15 dBm transmitted by the SOHO 6
Wireless
• The Noise level: determined by the environmental conditions
and the design of the receiver
The maximum data rate cannot exceed the channel capacity.
8
= ChannelBandwidth
1 + SignalStrength

×
------------------------------------------------ -
log
2 
NoiseLevel
WatchGuard Firebox SOHO 6 Wireless
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