无线传感器网络中的节点密度控制策略

无线传感器网络(WSN)能量有限,计算、存储和通讯能力有限,为了集中收集敏感区域的传感数据,该文提出了关于节点密度的服务质量(quality of service,QoS)指标,在对Gur Game算法改进的基础上,给出了节点带状、圆状以及可变椭圆状区域的密度控制策略,并设计了策略的动态梯度调整机制,给出了节点密度控制策略及其动态调整机制的仿真场景。仿真结果表明:开启节点的数量和位置随形状控制信息的不同而动态改变,加入动态调整机制能够在节点布撒过稀或过密的情况下动态产生核心区域和梯度区域。与未加入调整机制时相比,开启节点更加集中于核心区域中。策略能够有效的控制在关心区域内或靠近关心区域的开启节点数量达到QoS要求。

Node density control strategy in wireless sensor networks

Wireless sensor networks(WSN) have restrictions due to energy,memory, and communication ability.This paper relates the QoS(quality of service) with the node density and its control strategies given for rectangular,circular,and various elliptical areas and designs for a dynamic adjusting mechanism based on the Gur Game algorithm.Simulations show that the number and locations of the power-up nodes dynamically change when shape control information changes.A dynamic adjusting mechanism dynamically changes the kernel area and the gradient area when the nodes are too dense or too few.More power-up nodes can then be centralized in the kernel area compared with systems without the dynamic adjusting mechanism.The strategy controls the optimal number of nodes to power up in or close to the focused area so as to meet the QoS requirement.