基于认知无线电的应急通信网络设计与应用
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摘要
针对应急通信网络可靠性较低且不能充分利用稀缺网络资源等缺陷,利用认知无线电实时频谱感知和伺机频谱接入提高频谱资源利用率的优点,在资源受限的条件下,构建了一种基于认知无线电的应急通信网络。这种认知应急通信网络将对传统的公共应急通信系统进行升级改造,采用4层网络体系架构,是一种建立在底层异构物理网络上的软件可调节网络。认知应急通信网络互联整合事发现场的各种专用应急通信系统并进行QoS反馈控制,以提高应急通信服务的可靠性和可用性。实例分析表明,这种应急通信网络可通过资源实时感知和自适应管理缓解紧急情况下的资源紧缺问题,适用于多种应急场景。
Emergency communication network is low reliability and cannot exploit scarce network resource.Cognitive radio can improve spectrum utilization by real-time spectrum sensing and opportunistic spectrum access,emergency communications network based on cognitive radio is built in the resource-constrained conditions.This kind of cognitive emergency communication network will upgrade and modify traditional public emergency communication systems.Meanwhile,it adopts four-layered network architecture and is a software adjustable network based on underlying heterogeneous physical networks.It interconnects various special emergency communication systems in the scene and performs QoS feedback control to improve reliability and availability of emergency communication services.Case analysis shows that the emergency communication network based on cognitive radio can solve the shortage of resources in emergency situations by resource real-time perception and adaptive management and is applicable to a variety of emergency scenarios.
Emergency communication network is low reliability and cannot exploit scarce network resource.Cognitive radio can improve spectrum utilization by real-time spectrum sensing and opportunistic spectrum access,emergency communications network based on cognitive radio is built in the resource-constrained conditions.This kind of cognitive emergency communication network will upgrade and modify traditional public emergency communication systems.Meanwhile,it adopts four-layered network architecture and is a software adjustable network based on underlying heterogeneous physical networks.It interconnects various special emergency communication systems in the scene and performs QoS feedback control to improve reliability and availability of emergency communication services.Case analysis shows that the emergency communication network based on cognitive radio can solve the shortage of resources in emergency situations by resource real-time perception and adaptive management and is applicable to a variety of emergency scenarios.
引文
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[10]Mitola J.Cognitive radio for flexible mobile multimediacommunications[J].Journal on Mobile Networks andApplications,2001,6(5):435-441.
[11]Gorcin A,Arslan H.Public safety and emergency casecommunications:Opportunities from the aspect of cog-nitive radio[C]//Proc IEEE DySPAN 2008,2008:1-10.
[12]Pawelczak P,Prasad R V,Xia Liang,et al.Cognitive ra-dio emergency networks-requirements and design[C]//Proc IEEE DySPAN 2005,2005:601-606.
[13]宋丽华,王海涛.网络拥塞控制机制发展现状及研究思路探讨[J].桂林电子科技大学学报,2012,32(2):87-92.
[2]Haykin S.Cognitive radio:Brain-empowered wirelesscommunications[J].IEEE Journal on Selected Areas inCommunications,2005,23(2):201-220.
[3]李波,刘勤,李维英.认知无线电技术[J].中兴通讯技术,2006,12(2):10-13.
[4]胡晗,朱琦,朱洪波.应急通信系统的动态频谱接入及性能分析[J].信号处理,2010,26(6):811-818.
[5]赵绍,李岳梦.认知网络在未来移动通信网络中的应用——汶川地震后的思考[J].现代电信科技,2008(9):61-64.
[6]王海涛.应急通信网络中的异构网络互联问题及实现机制研究[J].电信科学,2011(3):65-70.
[7]Sutton P,Doyle L E,Nolan K E.A reconfigurable plat-form for cognitive networks[C]//2006 1st InternationalConference on Cognitive Radio Oriented Wireless Net-works and Communications,2006:231-238.
[8]Thomas R W,Friend D H,DaSilv L A.Cognitive net-works:Adaptation and learning to achieve end-to-endperformace objective[J].IEEE Communications Maga-zine,2006,44(12):51-57
[9]张东梅,张世栋.支持应急通信的认知网络QoS技术[J].中兴通讯技术,2010,16(5):33-36.
[10]Mitola J.Cognitive radio for flexible mobile multimediacommunications[J].Journal on Mobile Networks andApplications,2001,6(5):435-441.
[11]Gorcin A,Arslan H.Public safety and emergency casecommunications:Opportunities from the aspect of cog-nitive radio[C]//Proc IEEE DySPAN 2008,2008:1-10.
[12]Pawelczak P,Prasad R V,Xia Liang,et al.Cognitive ra-dio emergency networks-requirements and design[C]//Proc IEEE DySPAN 2005,2005:601-606.
[13]宋丽华,王海涛.网络拥塞控制机制发展现状及研究思路探讨[J].桂林电子科技大学学报,2012,32(2):87-92.
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