Energy-Efficient Cross-Layer Optimization for Wireless Sensor Networks

Yongqiang Fei, Peng Zhang, Yuping Zhao

School of Electronics Engineering and Computer Science, Peking University, Beijing, China.

DOI: 10.4236/cn.2013.53B2090                

Abstract

In this paper, we propose a cross-layer design combining adaptive modulation coding (AMC) and automatic repeat request (ARQ) to minimize the bit energy consumption under both packet loss rate and retransmission delay constraints. We analyze the best constellation size of M-ary square quadrature amplitude modulation (MQAM) in different distance, and give advice on retransmission limits under different packet loss rates. The impacts of path loss fading and additive white Gaussian noise (AWGN)are taken into consideration. The computation of energy consumption includes the circuit, transmission and retransmission energies at both transmitter and receiver sides. Numerical results are obtained to verify the validity of our design. We also show that the retransmission benefit varies with the packet loss rate constraint.

Keywords

Cross-Layer Design; Energy Consumption; Green Modulation; AMC; ARQ

Conflicts of Interest

The authors declare no conflicts of interest.

References

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