基于自适应混合中继协议的网络安全研究

Research on network security based on adaptive hybrid relay protocol

OFDM网络由于具有高频谱利用率、抗信道衰落等优点,已经被广泛应用到各种无线通信系统当中,然而像其他无线网络一样,物理层安全问题也是OFDM网络中的一个重要问题。由于协作中继技术可以增加OFDM网络的空间自由度,从而可以提高协作OFDM网络的用户的安全性和可靠性,文中提出了一个基于混合中继策略、中继选择、资源分配的自适应算法,该算法能够降低多用户协作OFDM网络的安全中断概率。接着本文将该优化问题转化成一个图论中的最大匹配问题,仿真结果表明,通过利用自适应混合中继策略和资源分配的技术优势,本文提出的安全算法能够极大地降低多用户协作OFDM网络的安全中断概率。

OFDM network is widely applied to various wireless communication systems due to its advantages of high spectrum utilization and channel fading. However, like other wireless networks, physical layer security is also an important problem in OFDM networks. Due to the cooperative relay technology can increase the OFDM network spatial degrees of freedom, so as to improve the safety and reliability of cooperative OFDM network users, this paper proposes a hybrid strategy based on relay, relay selection, adaptive resource allocation algorithm, the proposed algorithm can reduce the outage probability of safety of multi-user cooperative OFDM networks. In the paper, then the optimization problem is transformed into a graph maximum matching problem, the simulation results show that the technical advantage of adaptive hybrid relay strategy and resource allocation, the security of the algorithm can greatly reduce the safety of the outage probability of multi-user cooperative OFDM networks.