Exact BER Expression of 2-1-1 Relaying Scheme in Wireless Sensor Networks

Kong, Hyung-Yun

doi:2009.9.3.111

J. Electromagn. Eng. Sci > Volume 9(3); 2009 > Article

Journal of the Korean Institute of Electromagnetic and Science 2009;9(3):111-117.
DOI: https://doi.org/10.5515/JKIEES.2009.9.3.111

Exact BER Expression of 2-1-1 Relaying Scheme in Wireless Sensor Networks

Hyung-Yun Kong

Department of Electrical Engineering, University of Ulsan

Abstract

This paper presents an energy-efficient and bandwidth-efficient 2-1-1 relaying scheme in which a sensor node(SN) assists two others in their data transmission to a clusterhead in WSNs(Wireless Sensor Networks) using LEACH (Low-Energy Adaptive Clustering Hierarchy). We derive the closed-form BER expression of this scheme which is also a general BER one for the decode-and-forward cooperative protocol and prove that the proposed scheme performs the same as the conventional relaying scheme but obtains higher channel utilization efficiency. A variety of numerical results reveal the relaying can save the network energy up to 11 dB over single-hop transmission at BER of $10^{-3}$.

Key words: LEACH, Relaying Scheme, WSN