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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。
Wireless sensor networks (WSNs) have limited energy, limited computing, storage and communication capabilities. In order to collect sensitive sensor data in sensitive areas, a quality of service (QoS) index is proposed for node density. On the basis of the improved algorithm, the density control strategies of ribbons, circles and variable ellipses in nodes are given, and the dynamic gradient adjustment mechanism of the strategy is designed. The node density control strategy and the simulation of its dynamic adjustment mechanism are given Scenes. The simulation results show that the number and location of open nodes vary dynamically with the shape control information, and the dynamic adjustment mechanism can dynamically generate core regions and gradient regions when the nodes are sparsely distributed or densely distributed. Open nodes are more concentrated in the core area than when no adjustment mechanism is added. The strategy can effectively control the number of open nodes in the area of interest or close to the area of interest to achieve QoS requirements.