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沈国峰 《电信工程技术与标准化》2012,25(8):62-66
WLAN农村覆盖采用室外回传方案,为农村随时随地实现远程调度、信息传输、共享、管理提供便利的无线传输服务,是未来农村无线宽带覆盖的趋势.本文通过分析农村数据业务特点,阐述了室外回传覆盖方案. 相似文献
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本分析了一种用于可寻址有线电视收费系统的新型无源高频开关技术,同时提出了一种有效的有线电视路权管理和网络监控系统。该系统采用无源高频开关对信号进行关断实现路权控制;利用在电视信号中播中经过加密的节目标为监控对外部恶意信号的侵入,信号的回传方式支持HFC回传信道,无线回传信道,电话回传。它充分利用了计算机技术,网络技术和通信技术,能有效地监控网络的使用状况,使有线电视网络收费,网络管理监控变得更加容易,该系统成本低,安装和使用方便,安全性和可靠性高,为有线电视网络管理工作提出了一种可行的方案。 相似文献
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LTE异构网络通过更多的设备互操作达到更优的覆盖质量,异构网小型基站体积小,部署灵活。文章针对LTE异构网的典型设备提出在不同环境下宏微结合,立体组网,同时考虑使用灵活的无线回传方式进行数据传输,并通过仿真结果显示LTE异构网络在覆盖质量和容量方面的优势。运营商可以使用小基站来扩展覆盖范围,加大网络容量,提升用户感知。 相似文献
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在调频覆盖中,发射机房大多位于高山地带,移动信号覆盖差,信号回传通道单一,导致远程监控信号传输不稳定,对安全播出管理带来一定隐患。通过分析FRP网络传输技术的组网设计原理和特点,探讨FRP在调频覆盖远程监控网络中的应用,希望通过FPR组网技术改善远程数据回传质量,实现远程数据信息多通道安全、稳定、快速传输,有效辅助机房管理,保证调频覆盖的安全播出。 相似文献
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随着移动通信进入3G时代,移动回传网的承载问题日益受到业界关注。本文介绍了移动回传网在传送和承载方面的新需求,探讨了MSTP、PTN和IP/MPLS三种无线基站回传技术方案,对移动回传网的设计具有一定参考价值。 相似文献
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刘纯华 《信息安全与通信保密》2001,(3):12-14
专家曾预言,2000年的上半年将是数字革命的历史转折点,其具体含义是指网络正在从非主流地位转化为主流地位。网络经济正在从美国向世界各个地区扩散。在发展新经济的指导思想下,欧洲各国都憋着一股劲向前赶,以期赶上美国。在亚洲,传统经济向新经济的转变尤为明显,我国已有2250万人上网,2000年7月,企业上网工程正式启动,在这之前的政府上网工程取得了阶段性成果,电子商务也由一个时髦名词变为拥有无数实践者和牺牲者的创业模式。 相似文献
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Lucent Technologies公司的研发机构——批在贝尔实验室工作的科学家,开发出了一项能够显著延伸DWDM网络性能范围的新技术。这项被称为LambdaXtreme Transport的技术可以在不采用电子再生的情况下在长达 相似文献
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在网络结构的评估中,根据无线网络特征,将无线网络结构分为覆盖、容量和频率三个维度。容量作为其中一个最为主要的方面,在评估中,包括两个主要方面,即容量是否充足,容量是否均衡,通过制定了4个与容量相对应的指数,通过量化的数据对网络的容量做出一个合理科学的评估分析。 相似文献
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通过对哈尔滨本地网市话汇接局和无线市话汇接局现状和存在的问题的调查研究,结合本地网未来的发展趋势,提出了本地网汇接局的交换网络调整方案。 相似文献
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从数字集群的特点和作用出发,结合我国数字集群发展的现状.分析了数字集群专网.共同和公阐三者关系.依据信息产业部对数字集群的发展政策辩证地论述了我国现阶段数字集群通信系统的发展观。 相似文献
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This article describes a network concept called the wide area ubiquitous network (WAUN) and its research activities. WAUN is a network for sensors and actuators, and can support low-end wireless terminals, which are expected to be used for new applications. Among the many types of R&D being performed in the WAUN project, this article focuses on the feasibility of its basic feature and target. The basic feature is ?wide coverage using very-low-power-consumption terminals,? and its specific target is a ?5-km cell radius using 10-mW transmission power terminals with a battery life of 10 years.? The results of a basic field experiment and a laboratory experiment suggest that the target seems to be feasible using wireless technologies such as diversity reception (with additional future effort to improve the packet error rate for use in business districts) and LSI technologies such as a power switch fabricated in a CMOS/SOI LSI. 相似文献
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The ATM Forum completed the first version of its private network/network interface (PNNI) in March 1996 and many ATM switch manufacturers are now offering early implementations. PNNI offers a different type of internetwork or internodal interface from the traditional Signalling System No 7 based approach favoured to date by 'public' network operators, such as BT. In spite of its name, however, PNNI may find its place in network service provider networks as well as in 'private' or customer networks. Some of the perceived limitations of the current specification for such an environment are currently being addressed in version 2, tentatively due for completion in the second half of 1998.The PNNI really consists of two parts, a signalling protocol based around the ATM Forum's UNI signalling specification, and a dynamic source routeing protocol. This paper aims to provide an overview of the functionality and mechanics of PNNI, and to compare and contrast with the functionality offered by ITU-T's B-ISUP. 相似文献
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Neural network design of a banyan network controller 总被引:2,自引:0,他引:2
The algorithm for choosing nonblocking sets of data cells from the queues can significantly affect the throughput and queuing behavior. The authors present an algorithm that is shown to have maximum throughput. This algorithm is reduced on a banyan network to a constraint satisfaction problem by using an equivalence approach. To gain the required computational speed, the massive parallelism of neural networks is used. A neural network design using multiple overlapping winner-take-all circuits is defined. This is shown to be stable and to result only in nonblocking sets of data cells. An efficient interface between the neural network and the queue is also defined. The performance of the banyan with a neural network controller is compared to a noninternal-blocking switch with various controllers. The banyan is within a factor of two of the nonblocking switch 相似文献