有向移动异构传感网分布式部署策略

针对移动异构有向传感网的覆盖增强问题，提出了一种基于虚拟全向感知圆的节点分布式部署策略DDS（Distrib?uted Deployment Strategy）。DDS采用等面积虚拟全向感知圆替代有向节点感知扇形，根据不同感知圆之间的位置与半径大小关系为每个有向节点合理构建区域覆盖子区间，最后由该子区间多边形的形心确定节点的候选位置坐标。同时，DDS策略充分利用有向节点的旋转特性，计算节点视角方向使其面向检测区域外侧。节点通过视角调整和合理移动，不断提高网络覆盖率。仿真结果表明，DDS在提高网络覆盖率，增强节点分布均衡性方面具有明显的优势。

A Distributed Deployment Strategy in Heterogeneous Mobile Directional Sensor Networks

Aiming at the coverage enhancement problem of heterogeneous mobile directional sensor networks,a dis?tributed deployment strategy(DDS)based on the virtual omni-directional perception circle is proposed. DDS uses the equal-area virtual omnidirectional sensing circles to replace the sensing sectors of nodes,then structures the re?gional coverage subinterval for every node depending on the relationship of the positions and radiuses of different sensing circles. Finally,the candidate target location of every node is determined according to the centroid of its subinterval polygon. At the same time,making full use of the rotation of nodes,DDS gets the node's perspective di?rection to face the outside of the detection area. All nodes adjust their perspective directions and move reasonably to increase the network coverage continuously. The simulation results show DDS has obvious advantages in improving the coverage rate of network and enhancing the distribution balance of nodes.