Design of QoS Algorithm for Civil Aircraft Rear Cabin Integrated Network Architecture
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NETL
NSTL
维普
万方数据
民用飞机后舱包括信息系统(Information System,IS)、客舱核心系统(Cabin Core System,CCS)、机载娱乐(In-Flight Entertainment,IFE)系统、外部通信系统(External Communication System,ECS)等,各系统飞行安全域等级不同且网络交联关系复杂,这对传输服务质量(Quality of Service,QoS)提出极高要求,传统的QoS算法难以达到最佳效果.针对上述问题,将公平队列调度(Fair Weight Queue,FWQ)算法和随机早期检测(Random Early Detection,RED)算法相结合,整合到QoS处理系统上,并利用优先级双因素(Two-Factor,TF)机制对数据流进行精细化描述,提出一种民用飞机后舱一体化网络改进型QoS算法,命名为双因素加权公平队列随机早期检测(Two Factor-Fair Weighted Queue-Random Early Detection,TF-FWQ-RED)算法,使用OPNET网络仿真工具对该算法进行仿真验证.仿真运行结果显示,通过该算法可有效降低后舱高优先级业务流在网络拥塞场景下受延迟或丢包率的影响,同时保证了网络的高效运行,表明了TF-FWQ-RED算法的正确性以及对民机后舱混合复杂网络环境下现实需求的适应性.
The rear cabin of civil aircraft includes Information System(IS),Cabin Core System(CCS),In-Flight Entertainment(IFE)system,External Communication System(ECS),etc.The flight safety domain levels of each system are different and the network cross-linking relationship is complex,which puts forward extremely high requirements for transmission Quality of Service(QoS),and traditional QoS algorithms are difficult to achieve the best effect.In order to solve the above problems,the Fair Weight Queue(FWQ)algorithm and Random Early Detection(RED)algorithm are combined and integrated into the QoS processing system,and the priority Two-Factor(TF)mechanism is used to refine the description of the data flow.An improved QoS algorithm for the integrated network of the rear cabin of civil aircraft is proposed,named the Two Factor-Fair Weighted Queue-Random Early Detection(TF-FWQ-RED),and the algorithm is simulated and verified by OPNET network simulation tools.The simulation results show that the algorithm can effectively reduce the delay or packet loss rate of high-priority service flow in the rear cabin under the network congestion scenario,and ensure the efficient operation of the network,which shows the correctness of the TF-FWQ-RED algorithm proposed and its adaptability to the real needs in the mixed complex network environment of the rear cabin of civil aircraft.
NETL
NSTL
维普
万方数据
