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A Light-Weight Event-Driven Protocol for Sensor Clustering in Wireless Camera Networks

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3 Author(s)
Medeiros, H. ; Purdue Univ., West Lafayette ; Park, J. ; Kak, A.

We propose a light-weight event-driven protocol for wireless camera networks to allow for formation and propagation of clusters of cameras for the purpose of collaborative processing during object tracking. Cluster formation is triggered by the detection of objects with specific features. Our protocol allows for simultaneous formation and propagation of multiple clusters. Cameras being directional devices, more than one cluster may track a single object since groups of cameras outside each others communication range may see the same object. Entry into a cluster and cluster membership maintenance require a sensor node to confirm the presence of features of the object being tracked. Each cluster elects its own leader among the cameras that observe the same target. When a cluster leader loses track of an object, it assigns the leadership role to another cluster member. To avoid high communication overhead among cluster members, single-hop clusters are formed, i.e., every member of a cluster is within the communication range of the cluster head. We have implemented a simple version of this protocol on a test-bed and provide an experimental evaluation.

Published in:

Distributed Smart Cameras, 2007. ICDSC '07. First ACM/IEEE International Conference on

Date of Conference:

25-28 Sept. 2007