Abstract
Wireless sensor networks are an emerging technology for low-cost,
unattended monitoring of a wide range of environments. Their importance
has been enforced by the recent delivery of the IEEE 802.15.4 standard
for the physical and MAC layers and the forthcoming ZigBee standard
for the network and application layers. The fast progress of research
on energy efficiency, networking, data management and security in
wireless sensor networks, and the need to compare with the solutions
adopted in the standards motivates the need for a survey on this
field.
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