Resumen
Wireless sensor networks combine processing, sensing, and communications into tiny embedded devices. Peer-to-peer communication protocols then combine the individual devices into an interconnected mesh network where data is seamlessly routed among all the nodes. These networks require no external infrastructure and can scale to hundreds or even thousands of nodes. In sensor networking, special-purpose sensor nodes are purposely designed to sacrifice flexibility in order to be as small and inexpensive as possible. Generic sensor nodes provide a rich expansion interface for making flexible connections with an array of simple sensors. High-bandwidth sensor nodes contain the built-in processing and communication capabilities needed to deal with complex sensor streams, including video and voice processing. Traditional network abstractions are generally not suitable for wireless sensor networks. Unlike traditional operating systems, operating systems for wireless sensor networks must tightly integrate wireless connectivity.