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Book Description
Networked embedded systems provide a versatile computing platform for
supporting surveillance applications. These networks are typically left
unattended in harsh environments, making it impossible to re-charge
their batteries. Motivated by the large scale of sensor deployment, the
limited capabilities of sensors, and the hostility of the encompassing
environment, we design distributed protocols for topology management and
network synchronization. We address heavily-loaded networks, in which
sensors either periodically send their reports to an observer, or
respond to an observer's query. We construct a hierarchical (clustered)
network in which a subset of nodes are elected as super-nodes (cluster
heads). These heads constitute the routing infrastructure and aggregate
data from their cluster members. For load balancing, the super-node
functionality is rotated among the nodes. For nodes deployed in harsh
environments, we propose a methodology for supporting robust
connectivity and multi-path routing. We also consider applications and
protocols that require node synchronization, and design a framework for
time synchronization in multi-hop hierarchical networks.
About the Author
Dr. Ossama Younis is a senior research
scientist in Applied Research at Telcordia Technologies, Inc. He has
received his Ph.D. degree in computer science from Purdue University,
USA in 2005. His research interests are in the architecture of network
protocols and applications (especially sensor networks), and in
cognitive networking. |
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