基于异构性的传感网密钥预分配协议设计与评测

Heterogeneity-based Design and Evaluation of Key Predistribution Protocols for Wireless Sensor Networks

针对现有异构性研究系统性不足,缺乏与现实世界相契合的适用模型等问题,对传感网异构性进行了详细划分,并基于空间理论提出了形式化的异构空间模型,分析了动态异构性的变化趋势。随后,针对动态能量异构提出了一种能量有效的随机密钥预分配协议,并在特定的异构空间模型下对长期连通概率、抗毁性以及协议性能进行了评测。仿真实验结果表明,通过合理利用异构性,所提方案能够在保持一定连通概率、提高抗毁性的基础上,提供较其他同类方案更长的网络寿命。

To compensate the lack of systematicness and realistic model,heterogeneities were classified into several categories,a heterogeneity space model was built up by utilizing space theory,and the variation trend of dynamic heterogeneity was discussed. Then,an energy efficient random key pre-distribution protocol was proposed,which is inspired by dynamic energy heterogeneity. Under a certain heterogeneity space model,several evaluation metrics including long-term network connectivity,resilience and lifetime were also analyzed. Simulation result showed that by rational using of heterogeneity,the proposed protocol doesn't only keep connectivity and improve resilience,but also provide a much better network lifetime than other protocols.