关键词: 无线传感器网络, 椭圆轨迹, 传输协议, 并行传输, 协作转发

Abstract: In Wireless Sensor Network (WSN), it is difficult to realize high efficient transmission of large blocks of data such as images, videos and audios. An Elliptic Trajectory-based Reliable Forwarding (ETRF) mechanism was proposed for WSN. By using geographical location, multiple disjoint elliptic paths with equal distances among them were established from sources to sinks so that large blocks of data were divided into several small amounts of data, which were forwarded along separate elliptic paths in parallel, which increased network bandwidth and balanced network load. ETRF not only combined multiple redundant paths with the Forward Error Cowection (FEC) protection mechanism, but also utilized "back-off competition" and cooperation among neighboring nodes within a designated area to enhance the overall transmission performance in dynamic networks. Both theoretical analysis and simulation results demonstrate that ETRF exhibits a superior comprehensive performance compared with other relevant protocols.

Key words: Wireless Sensor Network (WSN), elliptic trajectory, transmission protocol, parallel transmission, collaborative forwarding