An Energy-efficient Architecture for Wireless Sensor Networks : Theoretical and Experimental Research

ISBN-13: 9783639117059 / Angielski / Miękka / 2009 / 160 str.

Ossama Younis

Opis

Networked embedded systems provide a versatilecomputing platform for supporting surveillanceapplications. These networks are typically leftunattended in harsh environments, making itimpossible to re-charge their batteries. Motivated bythe large scale of sensor deployment, the limitedcapabilities of sensors, and the hostility of theencompassing environment, we design distributedprotocols for topology management and networksynchronization. We address heavily-loaded networks,in which sensors either periodically send theirreports to an observer, or respond to an observer'squery.We construct a hierarchical (clustered) network inwhich a subset of nodes are elected as super-nodes(cluster heads). These heads constitute therouting infrastructure and aggregate data from theircluster members. For load balancing, the super-nodefunctionality is rotated among the nodes. For nodesdeployed in harsh environments, we propose amethodology for supporting robust connectivity andmulti-path routing. We also consider applicationsand protocols that require node synchronization, anddesign a framework for time synchronization inmulti-hop hierarchical networks.

O autorze

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.