Siemens IEEE802.11 Tutorial page 11

What is unique about wireless?
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Difficult media
– interference and noise
– quality varies over space and time
– shared with "unwanted" 802.11 devices
– shared with non-802 devices (unlicensed spectrum, microwave ovens)
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Full connectivity cannot be assumed
– "hidden node" problem
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Mobility
– variation in link reliability
– battery usage: requires power management
– want "seamless" connections
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Security
– no physical boundaries
– overlapping LANs
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Multiple international regulatory requirements
WLAN-IEEE802.11 Tutorial (Maximilian Riegel), 021018-wlan-tutorial.ppt Page 11 © Siemens, 2002