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Error Resilient Image Transport in Wireless Sensor Networks
 

Summary: Error Resilient Image Transport in Wireless
Sensor Networks
Huaming Wu, Alhussein A. Abouzeid
Department of Electrical, Computer and Systems Engineering,
Rensselaer Polytechnic Institute, 110 8th St. Troy, NY 12180 USA
Abstract
In this paper, we propose an "in-network" diversity combining scheme for image
transport over wireless sensor networks. We consider a wireless sensor network with
both wireless link impairments and node failures. We analyze two performance met-
rics of the proposed image transport scheme: energy consumption and received im-
age quality distortion. Our analysis models key aspects of the network including
forward error correction, path diversity, and the multi-hop nature of ad-hoc net-
works. The channel model used is a two-state Markov model describing errors on
the bit level. We also use a two-state Markov model of node transitions between
an "on" and "off" state. Reed-Solomon coding is used for forward error correction.
Theoretical and simulation results show the robustness improvement. This work also
helps in understanding the tradeoffs between image quality distortion and energy
consumption as a function of various network parameters such as the number of
hops between the source and the destination, the average channel error rate, and
the average node failure rate.

  

Source: Abouzeid, Alhussein A. - Department of Electrical, Computer and Systems Engineering, Rensselaer Polytechnic Institute

 

Collections: Engineering; Computer Technologies and Information Sciences