摘要： 节点能量直接影响无线传感器网络的寿命。为此,从保存节点能量角度入手,结合最大容量路径路由 协议,提出基于能量感知的Sink 节点移动方案EASM-INL,以最大化提高网络寿命。在EASM-INL 方案中,传 感节点依据电量水平调整传输范围,当电量下降时缩短传输范围,从而保存电量。Sink 节点收集传感节点的电 量数据,计算最大容量路径。只要有一条路径容量值小于门限值,Sink 节点就计算正东、南、北、西4 个方向上 的最大容量值,并沿最小值所在方向移动。仿真结果表明,与同类节点移动方案相比,EASM-INL 方案可有效延 长网络寿命。

关键词: 无线传感器网络, Sink 节点, 能量感知路由, 网络寿命, 能量

Abstract: Energy of nodes in Wireless Sensor Network ( WSN ) directly impacts on the network lifetime. Therefore,from the perspective of saving energy of nodes,sink node moving scheme based on energy awareness is proposed in this paper,which is marked as EASM-INL. In EASM-INL scheme,according to energy level,sensor nodes adjust the transmission range. As the slack,it shortens the transmission range in order to save electricity. In addition,sink node collects the information about energy of sensor nodes,and computes the Maximum Capacity Path (MCP). As long as there is a path capacity value less than the threshold,sink node is ready to move. It computes the maximum capacity path in north,south,east,west direction,and moves along the direction in minimum value. Then,it establishes theoretical derivation model and analyzes the EASM-INL scheme in term of improving the performance of network lifetime. Finally,this paper uses numerical simulation to verity the performance of EASMINL scheme. Simulation results show that EASM-INL scheme can prolong network lifetime compared with traditional sink moving schemes.

Key words: Wireless Sensor Network(WSN), Sink node, energy-aware routing, network lifetime, energy

中图分类号: 

• TP393