Cross-Layer Energy Efficiency of Orthogonal Modulations in TDMA-Based Wireless Sensor Networks
Energy conservation is a critical problem in recently emerging wireless sensor networks (WSNs). Orthogonal modulations appropriate for the energy-limited WSN setup have been investigated at link layer, but their energy efficiency is not very clear in cross-layer design. In this paper, based on a physicslink- MAC cross-layer design in WSNs, which integrates battery discharge models, node circuit and transmit power consumption, orthogonal modulations and a variable-length TDMA scheme, we investigate the energy efficiency of two M-ary orthogonal modulation schemes, namely pulse position modulation (PPM) and frequency shift keying (FSK). And to minimize the total energy consumption of WSN, we further have an optimization for the cross layer design. The numerical results show that the design with PPM has a noticeable energy efficiency advantage over that with FSK in densely-deployed WSN, and the optimization for cross-layer design can gain more energy conversation with both PPM and FSK.
wireless sensor networks (WSNs) cross-layer design orthogonal modulation TDMA energy efficiency
Wen Huan Tang Qiuling Yue Xiuyu Qin Tuanfa
School of Computer, Electronics and Information Guangxi University Nanning, China
国际会议
第四届国际计算机新科技与教育学术会议(2009 4th International Conference on Computer Science & Education)
南京
英文
404-407
2009-07-25（万方平台首次上网日期，不代表论文的发表时间）