基于物理层安全的最优化跨层调度方案

无线网络的调度方案要求以链路质量、传输率和时延等网络参数作为主要参考依据,控制和管理网络中节点的传输行为。现有的无线网络调度方案中都没有把网络安全纳入考虑,但是通常情况下,网络安全正是影响网络性能的重要因素。文中设计了一个新的无线网络调度方案,该方案可以在物理层实现通信的完美保密。通过把这个调度方案和IEEE802.11的Mac协议中已有的分布式协调功能(DCF)相结合,从而可以实现一个保证了物理层安全的新Mac协议——SecDCF。文中采用Matlab对该协议进行仿真,仿真结果显示在实现物理层安全的前提下,SecDCF相比传统的DCF可以显著提升性能。

An Optimized Cross-layer Scheduling Scheme based on Physical Layer Security

It is required that the scheduling scheme of wireless network should take network parameters, including link quality, transmission rate and delay, as the reference in controlling and managing transmission behavior of the network nodes. The existing scheduling schemes take no security into account, although the security plays a critical role in network performance. In this paper, a new scheduling scheme of wireless network is proposed, and this scheme could achieve perfect security of physical layer. By incorporating this new scheduling scheme into the distributed coordination function（DCF） of IEEE 802.11 MAC （medium access control）, a secure MAC protocol called SecDCF could thus be realized. Simulation with Matlab on SecDCF indicates that SecDCF could significantly outperform IEEE 802.11 DCF in achieving physical layer security.