考虑终端安全和资源调度的垂直切换算法

Vertical Handover Algorithm Considering Terminal Security and Resource Scheduling

存在恶意终端的超密集异构无线网络中,针对高并发接入请求带来的资源分配效率降低和拥塞问题,该文提出一种考虑终端安全和资源调度的垂直切换算法(CTSRS-VHA)。首先,在网络侧通过基于有限状态机的攻击检测算法,构建终端安全评估模型,计算得到终端安全度。其次,结合网络拥塞度、用户数据传输速率和终端安全度构建了一个多目标优化函数。再次,分析网络与终端之间的综合效益,把多目标优化函数转换成单目标优化函数求解,证明了该解为帕累托最优解。最后,仿真结果及分析表明,该算法能够提高网络的接入安全水平和总吞吐量,降低网络拥塞度和切换失败率。

In ultra-dense heterogeneous wireless networks with malicious terminals,a Vertical Handover Algorithm Considering Terminal Security and Resource Scheduling(CTSRS-VHA)is proposed to solve the problem of low resource allocation efficiency and congestion caused by high concurrent access requests.Firstly,the terminal security evaluation model is built on the network side through the attack detection algorithm based on the finite state machine,and the terminal security degree is calculated.Secondly,a multi-objective optimization function is constructed based on network congestion,user data transmission rate and terminal security degree.Thirdly,by analyzing the comprehensive benefits between the network and the terminal,the multi-objective optimization function is converted into a single objective optimization function,and the solution is proved to be Pareto optimal.Finally,the simulation results and analysis show that the proposed algorithm can improve the network access security level and total throughput,and reduce the network congestion and handover failure rate.