A Key Management and Cross-layer Routing Scheme for Wireless Sensor Networks

In this paper, a key management and security multi-hop routing scheme based on cross layer (SMRCL) was proposed for wireless sensor networks. The core of SMRCL has two parts as following. Firstly, a key management based on polynomial and time deployment for wireless sensor networks is proposed. In this scheme, the sensor nodes are divided into several deployment groups and deployed the network according to the time. Moreover polynomial is used instead of common key, which the redundant polynomial is deleted when a deployment group has been deployed to the network. Secondly, a multihop routing algorithm is proposed based on cross-layer, which can be used in large scale. In the algorithm, we can use the information of the MAC layer, consider the cross-layer design by the ratio of the packet sending/reception rate and queue length to improve the network load ability. Simulation results demonstrate that SMRCL can save energy and balance the network load and improve the network lifetime. Comparison of the probability of the sensor connectivity, performance of resistance to the node capture and the sensor node overheads, show that the scheme can guarantee the high probability of node secure connectivity, improves the performance of resistance to the node capture, reduces the node storage overhead effectively.