IMPLEMENTATION OF A WISN BASED ON THE WAVELET TRANSFORM AND A SMART ROUTING-TRANSMISSION PROTOCOL

Abstract

In wireless image sensor networks, a multimedia sensor node equipped with a tiny camera will capture
an image and send it to a sink via multiple wireless hops. The process has some stringent requirements such
as reliability in data transmission, energy consumption of nodes, and end-to-end delay in image
transmission. This paper proposes a smart routing-transmission protocol and the use of wavelet transform
to deliver images fast and reliably on a sink-originating tree topology. In this approach, the source
multimedia node utilizes the wavelet transform to compress the captured image, segments the image, and
forwards all segments along the data path. Then, nodes on the data path will collaborate to improve the
reliability of data transmission greatly without relying on retransmissions while making the packet move
fast. The proposed approach is verified by analysis and experiment, showing that it far outperforms the
recent approach in terms of end-to-end delay and packet delivery rate.