电视传送技术的无线传感器网络

为了适应未来市场的需求,新一代有线数字电视传送网络必须具有多传感器信息访问及设备互联能力。因此,无线传感器网络技术的引进势在必行。为了实现新一代有线数字电视网络延伸,进一步涵盖更多的区域,增加额外价值效益,通过集成新一代有线数字电视传输网络为骨干传输,搭建用户端无线传感器网络,其中网络架构设计包括物理网络构建和协议体系、无线及有线数字电视网络互联方案以及业务类别设计等内容。     

构建下一代有线数字电视传送网

分析了当前第二代有线电视传送网络存在的利弊,并介绍了下一代有线数字电视传送网络的分层和结构.     

矿山环境监测无线传感器网络节点总体设计

当前矿山环境监测系统大多采用存在监测盲区的有线网络。为解决这一问题,设计了无线传感器网络监测系统。     

无线传感器网络路由协议

本文在简要地介绍了无线传感器网络体系结构的基础上,研究了当前主要的几种无线传感器网络路由协议模型,并进行了比较分析.     

基于无线传感器网络的煤矿安全监测系统设计

煤矿安全已经成为社会非常重视和关注的问题.针对当前基于有线网络和固定传感器技术的监测系统存在监测盲区的问题,设计了一套基Zigbee技术的无线传感器网络煤矿安全监测系统方案.系统利用无线传感器网络,实现了监测节点的灵活布置;采用低耦合的RS232通讯协议及硬件模块化,实现了传感器的灵活添加与监测计算机软件稳定性的增强.     

无线传感器网络的概述

针对目前无线传感器网络(WSN)在军事、工业、国防等领域的广泛应用,本文就其发展、应用情况一一作了详细阐述,并指出了在无线传感器网络研究过程中面临的难题。     

基于ZigBee的无线传感器网络研究

为了验证ZigBee协议的有效性,叙述了新型无线ZigBee通信技术,介绍ZigBee协议的结构和特点,基于ZigBee协议的无线网络设备以及网络拓扑结构;ZigBee标准协议栈结构及数据在协议栈内部的传输机制。以两个网络设备成网为例,详细给出了ZigBee设备形成网络时,各个设备的工作状态、设备之间网络连接过程以及数据帧的发送过程。最后,通过Microchip公司的ZigBee实验平台验证了ZigBee无线星型组网,实验证明,ZigBee技术是有效的无线传感器网络组网技术。     

无线传感器网络WSN探究

集传感器技术、无线传输技术、网络通信技术、分布式信息处理技术与编程技术于一体而形成的无线传感器网络（WSN）,是一种全新的信息获取和处理系统,具有十分广阔的应用前景。介绍了无线传感器网络WSN的发展历程和现状,论述了无线传感器网络WSN系统的构成,阐述了WSN系统的主要技术指标和设计特点。同时,结合实际应用,对无线传感器网络系统的架构、网络通信模型结构以及当前的主要应用领域作了深入地探讨和研究,最后指出了当前WSN关键技术亟需解决的问题。     

无线传感器网络路由安全技术分析

文章分析了无线传感器网络路由安全性及面临的可能威胁,从加强密钥管理和路由安全协议两方面提出完善建议。     

基于无线传感器网络的MAC协议研究

无线传感器网络是一种应用极为广泛的新兴网络,MAC协议的研究已成为无线传感器网络中的研究热点。本文对几种典型MAC协议进行了分析,通过讨论其优缺点,指出了当前无线传感器网络面临的挑战,展望了进一步的研究方相。     

Investigation of CMOS Based Integration Approach Using DAI Technique for Next Generation Wireless Networks

Wireless Personal Communications - This research work investigates a CMOS based low noise amplifier (LNA) using differential active inductor with eight-shaped patch antenna for next generation...     

基于IMS的下一代网络

1IMS标准 3GPP是制订WCDMA标准的国际标准化组织,至今推出了R99(又称R3)、R4和R5三个标准版本。这几个版本都存在网络结构方面的变化。R4在核心网电路域引入了软交换,实现了控制与承载分离;R5在分组域增加了IP多媒体子系统(IP Multimedia Subsystem,简称IMS),提出了全IP的网络架构。     

基于DSSS技术的无线数据传送

工业控制中．需要实时、无差错地传送一些数据．但工业生产环境复杂．有时无法采用有线方式进行传送，而无线数据传输必须考虑恶劣的电磁干扰，本文介绍一种采用直接系列扩频通信技术传送数据的方法．有效的抑制了无线干扰．在某大型钢铁公司投入使用半年来．一直稳定的工作。     

Location-Based Service Provisioning for Next Generation Wireless Networks

We study how the wireless network infrastructure can support location-based services (LBSs). We assume that each mobile is equipped with self-geolocation capability. The wireless network can provide geolocation information of mobiles to an application services provider (ASP) so that the ASP can customize services based on the geolocation of the users. The main challenge in wireless networking is to keep track of the geolocation of mobile users such that the application service can maintain a certain quality of service (QoS). In general, the quality of service depends on how often mobiles update their geolocation. Because geolocation updates require battery power, radio resources, and signaling in the wired network, optimization of the geolocation update frequency is critical. In this paper, we present geolocation update schemes in which we can minimize the update frequency while satisfying the QoS of application service. For case study, we consider location-based traffic report service (LBS-TR) and location-based navigation service (LBS-NS). In LBS-TR, each mobile user about to enter a heavily jammed highway is informed in a timely manner so that the user can avoid traffic congestion. In LBS-NS, a mobile user is given navigation instructions custom-tailored to the geolocation of the user. The granularity of navigation instructions changes as the user moves from highway to local street and from local street to building complex.     

A Novel Regression Based Clustering Technique for Wireless Sensor Networks

The objective of this paper is to develop a new adaptive iterative linear regression based clustering algorithm for wireless sensor network. According to this, the initial cluster is classified horizontally and vertically in parallel, each resulting in two sub-clusters. Of these two, the best is selected based on the proposed similarity index and with this selected cluster as reference, iteration continues until the convergence criterion ‘Delta’ is met. The similarity index is designed based on the intra cluster similarity and inter cluster dissimilarity. Delta is the difference between the similarity index of the current iteration and the previous iteration. The proposal is implemented in MATLAB and simulations are carried out under different network scenarios. The cluster quality is evaluated through external and internal indices using the Cluster Validity Analysis Platform tool. The cluster obtained by the proposal is studied and its quality is compared with the well-established k-means and hierarchical clustering. The performance indices confirm the supremacy of the proposal.     

Cross-Layer Energy Based Clustering Technique for Heterogeneous Wireless Sensor Networks

Wireless Personal Communications - Effect of combination of dual split ring resonator and electromagnetic bandgap structures over substrate integrated waveguide and half-mode substrate integrated...     

6G Networks for Next Generation of Digital TV Beyond 2030

Wireless Personal Communications - This paper prosed a novel 6G QoS over the future 6G wireless architecture to offer excellent Quality of Service (QoS) for the next generation of digital TV beyond...     

下一代网络的研究

介绍了下一代网络的基本概念、特点、分层体系以及 NGN 的控制核心——软交换技术，阐述了单个软交换系统的组网体系结构和网络互通的方法，分析了下一代网络在演进和实施中需要解决的问题。