面向软件定义的铁路无线通信网络
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摘要
针对铁路无线数据通信带宽不足、可靠性不高等问题,提出一种基于软件定义的铁路无线通信网络(RailSDN),将控制平面和数据平面分离,实现跨运营商异构网络协同工作,采用虚拟化技术实现用户的逻辑隔离,为用户提供透明的数据传输服务。基于Markov决策过程建立网络资源调度模型,该模型考虑基础设施网络状态及用户需求等因素,以用户需求的满足程度为优化目标,搜索最优的链路分配决策,将用户需求与网络资源动态适配。测试结果表明:所提出的铁路无线通信网络具有很强的可扩展性,实现了用户需求的弹性定制,提高了网络资源的利用效率。
Railway wireless data communications have problems with insufficient bandwidth and poor reliability.This paper describes a railway software-defined wireless communication network(RailSDN)which separates the control plane from the data plane,enables heterogeneous network interoperability among operators,provides user logical isolation using virtualization,and provides transparent data transmission for users.A network resource scheduling model is developed based on a Markov decision process which takes into account various factors such as the infrastructure network status and the user requirements.The system searches for the optimal link allocation with the optimization goal being to satisfy user demand and dynamically adapts to the user requirements for the network resources.Tests show that this railway wireless communication network is scalable,enables flexible customization of user demand,and improves the network resources utilization efficiency.
Railway wireless data communications have problems with insufficient bandwidth and poor reliability.This paper describes a railway software-defined wireless communication network(RailSDN)which separates the control plane from the data plane,enables heterogeneous network interoperability among operators,provides user logical isolation using virtualization,and provides transparent data transmission for users.A network resource scheduling model is developed based on a Markov decision process which takes into account various factors such as the infrastructure network status and the user requirements.The system searches for the optimal link allocation with the optimization goal being to satisfy user demand and dynamically adapts to the user requirements for the network resources.Tests show that this railway wireless communication network is scalable,enables flexible customization of user demand,and improves the network resources utilization efficiency.
引文
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[2] HE R S,AI B,WANG G P,et al.High-speed railway communications:From GSM-R to LTE-R[J]. IEEE Vehicular Technology Magazine,2016,11(3):49-58.
[3]刘锋,王渝斐.基于可编程控制网关的一体化网络体系结构[J].北京航空航天大学学报,2015,41(10):1959-1965.LIU F,WANG Y F.Architecture of unified network based on programmable control gateway[J].Journal of Beijing University of Aeronautics and Astronautics,2015,41(10):1959-1965.(in Chinese)
[4] KREUTZ D,RAMOS F M V,VERISSIMO P E,et al.Software-defined networking:A comprehensive survey[J].Proceedings of the IEEE,2015,103(1):14-76.
[5] BENZEKKI K, FERGOUGUI A E, ELALAOUI A E.Software-defined networking(SDN):A survey[J].Security&Communication Networks,2016,9(18):5803-5833.
[6] RANGISETTI A K,TAMMA B R.Software defined wireless networks:A survey of issues and solutions[J]. Wireless Personal Communications,2017,97(4):6019-6053.
[7]董玮,陈共龙,曹晨红,等.面向软件定义架构的无线传感器网络[J].计算机学报,2017,40(8):1779-1797.DONG W,CHEN G L,CAO C H,et al.Towards a software-defined architecture for wireless sensor networks[J]. Chinese Journalof Computers, 2017, 40(8):1779-1797.(in Chinese)
[8] XU S, WANG X W, HUANG M. Software-defined next-generation satellite networks:Architecture,challenges,and solutions[J].IEEE Access,2018,6:4027-4041.
[9] TRIVISONNO R, GUERZONI R, VAISHNAVI I,et al.SDN-based 5G mobile networks:Architecture, functions,procedures and backward compatibility[J]. Transactions on Emerging Telecommunications Technologies,2015,26(1):82-92.
[10]孙文琦,李贺武,吴建平.软件定义网络中的快速移动性管理[J].清华大学学报(自然科学版),2015,55(8):900-905.SUN W Q,LI H W,WU J P.Fast mobility solutions in software-defined networks[J].Journal of Tsinghua University(Science and Technology),2015,55(8):900-905.(in Chinese)
[11]赵尚弘,陈柯帆,吕娜,等.软件定义航空集群机载战术网络[J].通信学报,2017,38(8):140-155.ZHAO S H,CHEN K F,LYU N,et al.Software defined airborne tactical network for aeronautic swarm[J].Journal on Communications,2017,38(8):140-155.(in Chinese)
[12]ZHU L, YU F R, TANG T,et al. An integrated train-ground communication system using wireless network virtualization:Security and quality of service provisioning[J].IEEE Transactions on Vehicular Technology,2016,65(12):9607-9616.
[13]杨懋,杨旭,李勇,等.基于虚拟化的软件定义无线接入网结构[J].清华大学学报(自然科学版),2014,54(4):443-448.YANG M,YANG X,LI Y,et al.Virtualization based software-defined radio access network architecture[J].Journal of Tsinghua University(Science and Technology),2014,54(4):443-448.(in Chinese)
[14]CHOWDHURY N M M K,BOUTABA R.A survey of network virtualization[J]. Computer Networks,2010,54(5):862-876.
[15]JERVIS M,SEN M,STOFFA P L.Network innovation using OpenFlow:A survey[J].IEEE Communications Surveys&Tutorials,2014,16(1):493-512.
[16]VASCONCELOS C R,GOMES R C M,COSTA A F B F,et al.Enabling high-level network programming:A northbound API for software-defined networks[C]//Proceedings of InternationalConferenceonInformationNetworking.Piscataway,USA:IEEE Press,2017:662-667.