Maximizing Network Lifetime in Wireless Video Sensor Networks Under Quality Constraints
Nesrine Khernane, Jean-François Couchot, Ahmed Mostefaoui · 2016
In traditional sensor networks, data processing is mostly simple and even negligible in terms of energy consumption. On the opposite, in Wireless Multimedia Sensor Networks (WMSNs) the captured data is usually voluminous and requires local processing. The objective here is to deliver data at desired visual quality. Obviously, better the visual quality is, higher the encoding power and higher the energy necessary for delivering data to the sink are. Inversely, higher the network energy consumption is, lower its lifetime is. Consequently, a trade-off between the expected visual quality at the sink and the network constraints has to be find in order to prolong the network lifetime as longer as possible. In this paper, we propose a fully distributed algorithm that maximizes the network lifetime by jointly optimizing the encoding power and the source rate in order to meet a desired visual quality. In opposition to existing approaches, our algorithm, of distributed nature, is ensured to find such a trade-off whatever the initial network configuration is. In addition, simulation results show the effectiveness of our proposal in reducing until 95% of the total time to find such a trade-off in comparison to the state-of-art approaches.