能量平衡的异构传感网跨层密钥管理方案

Energy balance based cross-layer key management scheme in heterogeneous sensor networks

传统的传感网密钥管理协议独立于网络其他层设计,这种层间的独立性造成传感器节点物理性能浪费,网络整体性能降低。从节点剩余能量出发,提出一个能量平衡的异构传感网跨层密钥管理方案。通过节点剩余能量、节点度数等参数,从能量平衡的角度出发确定下一跳节点的选择,再利用密钥交换建立两节点间的会话密钥,该方案将网络层节点路由关系与应用层节点密钥关系结合,实现了密钥管理的跨层设计。结果表明,该方案保证节点密钥连通性的同时,均衡网络节点间的能耗关系,有效延长了异构传感网的生命周期。

Traditional network laying based network protocol can result in waste of physical performance of the sensor and cause drop of the whole performance of the network. A key management scheme for heterogeneous sensor networks based on residual energy of nodes is proposed, which balances the energy consumption among the sensors and prolonged networks lifetime. Next hop node in the forwarder space of the sensor is selected based on rest energy, node degree and so on. Meanwhile, a shared secret between two nodes is established through key exchange to make their communication more secure and trusted. The scheme combines route relation at the network layer with key relation of nodes at the application layer effectively, which realizes crosslayer design of key management. The experimental results show that the proposed algorithm guarantees key connectivity while balances energy of nodes and extends the lifetime of wireless sensor networks.