Performance Analysis of Retransmission and Redundancy Schemes in Sensor Networks

In this paper, by establishing the probability models, we systematically and comprehensively analyze the roles of the packet retransmission, the block retransmission, and the erasure coding in the reliable transport of wireless sensor networks. And as well as the three kinds of packet level schemes, we also consider the effect of two kinds of bit level strategies, CRC and FEC. At last, based on the numeric results, the appropriate schemes for different BER (high, medium, and low) are determined, and we also present some principles that reveal profound insights in designing reliable protocols and mechanisms in wireless sensor networks.