共查询到18条相似文献,搜索用时 15 毫秒
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文章对高空无人飞行器通信网络中使用的分布式测控系统进行描述,通过使用的分布式测控系统架构、窄带情况下报文压缩和传输链路切换时的数据同步技术,提出了一种基于网络化的分布式测控方法,用于解决高空无人飞行器通信网络的设备管控难题。 相似文献
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目前农业物联网测控系统数据交换普遍采用基于socket的简单通信。为解决使用socket通信产生的数据交换复杂,系统耦合性大的问题,将WebServices技术应用到linux的嵌入式农业物联网测控中,并给出了测控系统体系结构及软、硬件实现方法。WebService技术使得嵌入式测控系统有了标准的数据表示格式和数据交换协议,提高了开发效率,便于系统修改、定制。实验结果表明,该系统性能稳定,无线数据采集与设备控制能达到实际需求,具有较高的实用性。 相似文献
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目前农业物联网测控系统数据交换普遍采用基于socket的简单通信。为解决使用socket通信产生的数据交换复杂,系统耦合性大的问题,将Web Services技术应用到linux的嵌入式农业物联网测控中,并给出了测控系统体系结构及软、硬件实现方法。Web Service技术使得嵌入式测控系统有了标准的数据表示格式和数据交换协议,提高了开发效率,便于系统修改、定制。实验结果表明,该系统性能稳定,无线数据采集与设备控制能达到实际需求,具有较高的实用性。 相似文献
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提出了一种新型的室内密集立体覆盖的计算通信一体化架构,通过挖掘信道计算、容量计算以及网络资源优化计算之间的内在联系,并利用基于云计算和雾计算的密集分布式接入网络的优势,该架构完成了计算电磁学、计算信息论与大规模优化理论到计算通信理论的深度融合.介绍了该架构的实现方法,即以密集异构分布式无线接入网络作为通信接入网络基础架构,利用分布式的计算资源结合计算电磁学理论实现并行化的信道计算,据此进一步依据计算信息论实现容量计算,并基于大规模优化理论完成多用户的网络资源优化计算,最终实现由传播环境到信道容量与资源分配的计算通信. 相似文献
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电力需求侧管理与服务集成平台是智能电网的重要组成部分。针对需求侧复杂环境下的电信息采集与控制数据交互问题,以及基于分布式计算通信需求问题,提出了基于ZeroMQ(Zero Message Queue,零消息队列)消息中间件的分布式通信架构,并设计了能够传输需求侧数据采集与需求响应及其它复杂消息的通用消息格式。ZeroMQ的优秀性能使得该通信架构可有效支撑分布式计算平台在异构系统间快速交换数据,缩短了智能电网高级应用分析的数据交互与计算时间,增加了系统的容错性。利用佛山市需求侧服务集成平台的实际工程环境进行了部署和测试,测试结果证明了该通信架构的可行性。 相似文献
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《中国无线电电子学文摘》1999,(4)
TN91 99U4U778分布式测控环境下的实时通信研究/杜承烈,李言俊,龚德辉(西北工业大学)11航空学报一1999,20(l),一83一85面向服务于航空试验的测控系统,提出了通过构架分布式测控环境的方法实现航空测控系统集成的构想,分析了航空试验测控系统中实时通信的特殊性,设计了基于以太网络的实时通信协议,并在此协议之上实现了分布式测控环境下的实时通信服务。参3(木)TNgll 99040784再论中国信息产业的发展战略/有线电视多媒体业务接入模式研究课题组(国家广播电影电视总局)Ij电子展望与决策.一1998,(6)一5一24发展计算机网络通信,是中国信息产… 相似文献
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文章提出了一种基于IPv6实现6LoWPAN和Zigbee两种异构协议通信的架构——6LoWPAN-IPv6-Zigbee。6LoWPAN-IPv6-Zigbee架构在分析异构节点互通问题的基础上,设计了协议转换、网关功能以及节点交互流程;基于现有的异构节点互通方案,设计了的异构节点互通场景、系统结构、协议转换模式以及网关功能;基于寻址、服务发现等互联互通关键技术,设计了异构节点交互流程。6LoWPAN-IPv6-Zigbee架构可为同时存在Zigbee节点与6LoWPAN节点的混合传感网络提供良好互通性。 相似文献
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针对广播发射台的强电磁环境,从工程角度出发,提出了由PC机和STDS000系列工控机组成的分布式计算机测控系统,实现了对多台广播发射机的数据采集,监测控制,故障报警及运行管理。着重讨论了系统的结构组成,软件功能及运行模式,并引入了windows环境,BITBUS通信网。 相似文献
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An approach to communication architectures for high-speed networks which provides efficient, adaptive communication for any traffic distribution is presented. It is based on a concept of dynamic sharing of communication resources which is obtained from the following three-tier SWIFT architecture. At the physical layer the high-speed communication system is based on the use of several lower speed channels or frequencies. At the data link layer, driven by hardware simplicity considerations, the SWIFT architecture uses a fixed time-slotted allocation of subchannels, in which each node is required to transmit or receive over only a single, predetermined, subchannel at a time. To provide adaptive channel access control, while preserving the data link hardware simplicity, a network layer is added. This layer introduces multihop adaptive channel (frequency) routing on the inherently broadcast communication medium. The routing concept provides dynamic sharing of communication channels and buffers, leading to a fully distributed adaptive bandwidth control. An analytic model for analyzing the performance of the multilayered architecture is developed. It shows that for homogeneous or heterogeneous traffic requirements the approach provides throughput/delay performance superior to that found in existing communication systems 相似文献
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为了实现小型的分布式系统内部的高效通讯,利用ZeroMQ(Zero Message Queue零消息队列)来实现分布式系统,并提出了把系统中央单元的数据传输功能分离出来,仅保留其目录服务功能,让客户机与服务器之间直接通讯的方案。中央单元manager为每一种服务创建一个消息队列来存储这种服务对应的所有服务器,并利用最近最少使用算法为每个客户机选择合适的服务器。manager与服务器、manager与客户机以及服务器与客户机之间的通讯都选用套接字对XREQ—XREP实现异步的双向通讯。由于Delphi2007能够方便地实现人机交互界面,选择其为开发平台。这个分布式系统用于轮轨检测实验中,大大提高了数据的传输效率,解决了实验中存储难的问题。 相似文献
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A major health care provider is migrating its existing centralized computing system to a distributed computing infrastructure that will support advanced clinical, business, and workgroup applications and connectivity. Deploying a modern distributed architecture integrated with a traditional, heterogeneous mainframe-oriented enterprise data processing and information retrieval environment is an enormous undertaking. This process requires major changes for the enterprise, especially in the areas of the network, control and operations, systems deployment, integration and cost management tools, and personnel. Our case example is Kaiser Permanente Northern California Region (KPNCR). Information Technology Services (ITS), a division of KPNCR, provides network and computer support and operation, architecture and standards, and information technology. This division, in partnership with business planning and operational units, is responsible for creating the distributed architecture. The transition, estimated to take three to five years, is underway. ITS plans to deploy the proposed architecture at three medical facilities. This pilot will provide the technology foundation for a concurrent pilot of a planned enterprise-wide clinical information system. Results from the pilot will influence plans to deploy the distributed architecture enterprise-wide 相似文献
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Many embedded computers are distributed systems, composed of several heterogeneous processors and communication links of varying speeds and topologies. This paper describes a new, heuristic algorithm which simultaneously synthesizes the hardware and software architectures of a distributed system to meet a performance goal and minimize cost. The hardware architecture of the synthesized system consists of a network of processors of multiple types and arbitrary communication topology; the software architecture consists of an allocation of processes to processors and a schedule for the processes. Most previous work in co-synthesis targets an architectural template, whereas this algorithm can synthesize a distributed system of arbitrary topology. The algorithm works from a technology database which describes the available processors, communication links, I/O devices, and implementations of processes on processors. Previous work had proposed solving this problem by integer linear programming (ILP); our algorithm is much faster than ILP and produces high-quality results 相似文献
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Akaike T. Ishakawa K. Saito K. Mito M. 《Selected Areas in Communications, IEEE Journal on》1993,11(4):540-549
A protocol control system architecture that provides very high processing performance for gigabit-per-second data communication in a broadband network is described. The architecture connects protocol controllers in parallel and uses a distributed multilink method that features a distributed algorithm for allocating transmission on the transmitting side and a resequencing algorithm on the receiving side. The system performance and the influence of transmission errors caused by cell loss in an asynchronous transfer mode network are evaluated. It is shown that by reducing each controller's distributing overhead, the system increases throughput up to 90 times that achieved when using a single controller 相似文献