基于动态复合优先级的海上节点网络选择算法

Network Selection Algorithm of Maritime Nodes Based on Dynamic Composite Priority

针对海上移动节点完成业务时出现高优先级业务完成率低、业务拥堵率大、网络接入算法对波动环境适应性不足的问题,提出一种基于动态复合优先级的网络接入算法。首先,移动节点收集周围机动站点的网络属性参数,计算产生业务的执行紧迫性和剩余价值,再将不同类型业务的参数权重加入VIKOR法,形成最终的动态复合优先级,针对环境网络参数提供合适的连接方案,对请求接入的业务进行排序和接入。最后利用动态复合优先级加权计算后得到的实时环境权重更新业务参数权重。所提算法加强了业务时效性的特征,同时还兼顾了对环境波动网络参数的适应性。仿真结果表明:该算法相对于时间优先级算法和优先级控制算法,能够在提高算法业务完成率的同时提高通信网络流畅度。

In order to solve the problems of low completion rate of high priority services,high congestion rate and poor adaptability of network access algorithm to fluctuating environment when maritime mobile nodes complete different levels of services,a network access algorithm based on dynamic composite priority is proposed.Firstly,the mobile node collects the network attribute parameters of the surrounding mobile stations,adds the parameter weights of different service types in VIKOR method,and provides the appropriate connection scheme for the environmental network parameters,and then obtains the real-time environmental weights by weighted calculation.Then,the mobile node calculates its execution urgency and residual value according to the services generated by itself,and forms the final dynamic composite priority by combining the environment weight obtained by VIKOR method to sort and access the services requested.The proposed algorithm not only enhances the timeliness of services,but also takes into account the adaptability of network parameters to environmental fluctuations.The simulation results show that compared with time priority algorithm and priority control algorithm,the algorithm can improve the completion rate of the algorithm service and the network communication fluency.