无线传感器网络中能量有效的波束成形机制

doi:10.3969/j.issn.1000-436x.2013.04.003

Abstract

Abstract:

Aiming at the limitation of energy and communication distance for nodes in wireless sensor networks and the characteristics of premature death due to ignoring the energy balance for traditional beamforming schemes,an energy efficient beamforming scheme was proposed.First the impact of the number of nodes,the transmission coefficients,the limited power,and the arrival phase on the network energy consumption is analyzed,and the corresponding design principles are given.Then,the nodes which participate the beamforming are selected based on these principles their transmission coefficients are adjusted according to their residual energy and phase.The analysis and simulation results show that the proposed scheme can effectively increase the number of successful transmission,balance the energy consumption among the nodes and prolong the network lifet me.

Key words: wireless sensor networks, beamforming, energy balance, transmission coefficients

Zhi-chao QIN,Zheng ZHOU,Xiao-chuan ZHAO. Energy efficient beamforming scheme for wireless sensor networks[J]. Journal on Communications, 2013, 34(4): 19-27.

Figures/Tables 11

References 21

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符号	意义	值
N	节点的总数	100
E_elec	电路消耗参数	50 nJ/bit
k	数据分组长度	4 000bit
b	控制分组长度	20
e_fs	功率放大器消耗参数	10 pJ/bit/m²
d_max	单个节点所能达到的最大传输距离	100m
?	区域半径	50m
r_d	目标节点距离该区域的距离	1 000m
E_max	节点的最大初始能量	0.1J

算法	剩余能量间方差	剩余能量的总和/J
PP	7.41×10^{- 4}	4.35
EP	2.41×10^{- 6}	0.30
EEBS	5.49×10^{- 8}	0.04

Energy efficient beamforming scheme for wireless sensor networks

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