Rate based cross layer optimizations for image delivery in wireless sensor networks

A number of growing sensor applications such as target tracking and health monitoring motivate rate-based image transmissions in the Wireless Sensor Network (WSN). In this paper, we propose a cross layer based optimal approach for image sensors to decide transmission patterns based on a Rate-Oriented Routing scheme, which achieves both high energy efficiencies and longer network lifetime. In this approach, a group of image sensors transmit the images through appropriate rate-based routing paths under the user requirements. The simulation results show that the proposed image transmission scheme can achieve considerable gains in terms of the WSN energy efficiency and network lifetime extension.