基于环-树型拓扑的无线传感网密钥管理方案

Key management scheme of wireless sensor networks based on ring-tree network topology

设计了一种基于无线传感网的拓扑模型——环-树型网络拓扑模型。基于该模型,结合节点命名机制,提出了一种新的密钥管理方案。该方案在拓扑结构上改变传统的三层分簇拓扑为四层分簇拓扑,在路由安全问题上采用二次核实机制。经仿真工具OMNET++实验,较传统的三层分簇拓扑模型,该方案的网络拓扑模型延长了第一个节点的死亡时间,且整个网络具有更长的生命周期和更好的安全保证。

A network topology model named ring-tree network topology model is designed. Based on this model, combining with nodenaming mechanism, a new scheme of key management is proposed. The new scheme changed the traditional three-layer clustering topology to the four-layer one, and used secondary verification mechanism on the routing security issues. At last, they used the simulation tool named by OMNET＋＋ to simulate. Compared to traditional three-layer clustering topology, the simulation results show that the new scheme extended the first node’s death time, and the entire network had a longer life cycle and better security guarantees.