无线传感器网络中能量有效的波束成形机制  

Energy efficient beamforming scheme for wireless sensor networks

作　　者：秦智超[1] 周正[1] 赵小川[1] 

机构地区：[1]北京邮电大学泛网无线通信教育部重点实验室,北京100876

出　　处：《通信学报》2013年第4期19-27,共9页Journal on Communications

基　　金：国家科技重大专项基金资助项目(2009ZX03006-009);韩国知识经济部仁荷大学ITRC基金资助项目(NIPA-2011-C1090-1111-0007)~~

摘　　要：针对无线传感器网络中单个节点能量和通信距离均受限,以及传统波束成形机制中由于忽略能耗均衡而造成单个节点过早死亡的特点,提出了一种能量有效的波束成形机制。首先分析了节点个数、发射系数、功率受限、相位等因素对网络能耗的影响,给出了对应的设计原则。然后,基于此原则来选择参与发射的节点,并结合节点的剩余能量和相位来调整各自的发射系数。理论分析和仿真结果表明,该机制有效地增加了数据成功传输的次数,均衡了节点间的能耗,延长了网络寿命。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 ef- ficient 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 prin- ciples are given. Then, the nodes which participate the beamforming are selected based on these principles and 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 con- sumption among the nodes and prolong the network lifetime.

关 键 词：无线传感器网络 波束成形 能量均衡 发射系数 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]