非均匀分布下无线传感器网络节点调度机制

Non-uniform distribution node scheduling scheme in wireless sensor networks

针对传统依赖精确位置信息的计算复杂和无位置信息部署受限性等弊端,从理论上对节点部署方式进行分析,提出一种非均匀分布下的无线传感器网络节点调度NDNS(non-uniform distribution node scheduling)机制,该机制利用节点与邻居节点的距离信息,对节点覆盖冗余进行判别,适应于任意分布下的网络部署方式。通过实验对机制进行了性能分析和验证,结果表明该方案在保证网络覆盖的前提下,有效地延长了网络生存时间。

Aiming at the defect that high computational complexity of exact location information and the distribution limitation of location information-free in traditional schemes,the node distribution was analyzed theoretically.A node scheduling scheme NDNS（non-uniform distribution node scheduling） was proposed which satisfies with different ran-dom distribution.The precision for node redundancy evaluating was improved by using the distance information between the sensor and its neighbors and applicable to any distribution deployment.The scheme was analyzed and validated for performance through experiments.The numerical experiments results illustrate that the longer network lifetime was achieved in preserving networks coverage.