随着科技的发展,无线自组织网络被越来越多的应用于国民生产和生活中,成为信息传输的一种重要的形式和发展趋势。为了解决无线自组织网络的扩展性差、配置不灵活的问题,为实时性业务流的传输提供保障,本文设计了无线自组网交换机流处理...随着科技的发展,无线自组织网络被越来越多的应用于国民生产和生活中,成为信息传输的一种重要的形式和发展趋势。为了解决无线自组织网络的扩展性差、配置不灵活的问题,为实时性业务流的传输提供保障,本文设计了无线自组网交换机流处理机制。在基于软件定义网络(Software Defined Network,SDN)的整体传输控制架构的设计基础上,进行了基于优先级的资源预留机制和计算资源与网络资源协同调度技术的研究。实验结果表明了本文的传输机制的有效性。展开更多
Abts ract A wireless mutl i-hop videot ransmission experiment system is designed and implemented for vehiculra ad-hoc networks VANET and the rt ansm ission control protocol and routing protocol are proposed. This syst...Abts ract A wireless mutl i-hop videot ransmission experiment system is designed and implemented for vehiculra ad-hoc networks VANET and the rt ansm ission control protocol and routing protocol are proposed. This system in tegrates the embedded Linux system witha n ARM kernel and oc ns ists of a S3C6410 main control module a wirel ss local arean etwork WLAN card a LCD screne and so on.In the scenario of a wireless multi-hop video transmission both the H.264 and JPEG are used and their performances such as the compression rate delay and frame loss rate are analyzed in theory andc ompared in the experiment.The system is tested in the real indoor and outdoor environment.The results show that the scheme of the multi-hop video transmission experiment system can be applicable for VANET and multiple scenes and the transmission control protocol and routing protocol proposed can achieve real-time transmission and meet multi-hop requirements.展开更多
文摘随着科技的发展,无线自组织网络被越来越多的应用于国民生产和生活中,成为信息传输的一种重要的形式和发展趋势。为了解决无线自组织网络的扩展性差、配置不灵活的问题,为实时性业务流的传输提供保障,本文设计了无线自组网交换机流处理机制。在基于软件定义网络(Software Defined Network,SDN)的整体传输控制架构的设计基础上,进行了基于优先级的资源预留机制和计算资源与网络资源协同调度技术的研究。实验结果表明了本文的传输机制的有效性。
文摘数据融合是降低无线传感器网络的冗余能耗、延长网络生存期的有效手段之一.传输延时的分配是数据融合中的重要问题,它对网络融合的效果和数据分组的传输延迟具有很大影响.提出了一种基于融合贡献的传输延时分配算法ACDA(aggregate contribution based delay-time allocation),量化了路由树中不同位置的节点对融合效果的影响,并依此按比例分配融合等待时间.算法充分考虑到了各节点在路由树中的位置差异性和节点间的相互影响.仿真结果表明,同现有的几种延时分配算法相比,ACDA能够更加有效地改进数据融合效果,提高网络实时性.
基金The National Natural Science Foundation of China(No.61201175,61171081)Transformation Program of Science and Technology Achievements of Jiangsu Province(No.BA2010023)
文摘Abts ract A wireless mutl i-hop videot ransmission experiment system is designed and implemented for vehiculra ad-hoc networks VANET and the rt ansm ission control protocol and routing protocol are proposed. This system in tegrates the embedded Linux system witha n ARM kernel and oc ns ists of a S3C6410 main control module a wirel ss local arean etwork WLAN card a LCD screne and so on.In the scenario of a wireless multi-hop video transmission both the H.264 and JPEG are used and their performances such as the compression rate delay and frame loss rate are analyzed in theory andc ompared in the experiment.The system is tested in the real indoor and outdoor environment.The results show that the scheme of the multi-hop video transmission experiment system can be applicable for VANET and multiple scenes and the transmission control protocol and routing protocol proposed can achieve real-time transmission and meet multi-hop requirements.