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论述了高速铁路宽带无线接入的需求和难点,讨论了现有网络覆盖方案的不足,并对采用LTE技术的HRC方案进行了初步探讨,对HRC系统的发展应用进行了总结。 相似文献
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《Planning》2014,(19)
随着互联网和多媒体技术的快速发展,人们对相关业务如高速率的高清数字电视、高质量的视频录制点播等的需求量日益增长,融合网络技术的发展加快。光与无线融合宽带接入网结合了光通讯与无线通讯两者的优势,实现了动态、灵活、高速的宽带信息接入,同时智能控制技术实现业务切换、合理配置网络资源,实现网络智能控制的灵活性和动态性。本文从网络拓扑关系、资源实时动态配置和网络性能管理三个方面对光与无线融合宽带接入网中的智能控制技术进行了简单分析。 相似文献
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苏建利 《智能建筑与城市信息》2014,(6)
智慧机场的一个主要基础平台就是通信的统一平台,如何在机场范围内搭建一个无线宽带的通信网络是此文所论述的重点。此文通过对1800M数字无线集群通信的规划、设计,为机场无线宽带通信提供一种解决思路和方法。 相似文献
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无线Mesh网(WMN)是近年被高度重视和快速发展的一种新型无线网络技术,支持宽带高速多媒体业务服务.本文就无线Mesh网络技术的关键技术进行了分析,并重点讨论了Mesh网的安全问题及解决策略. 相似文献
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随着互联网应用的深入,宽带接入的大范围普及,远程无线数据传输业务的高速发展,互联网与无线通信技术商业应用的价值已经得到显著证明,也正逐渐被市场所认可。随处可见的互联网接入点(家庭宽带、小区无线覆盖、公共区域无线上网、移动手持设备无线接入点等)是无线互联网应用的基础,而无线数据传输网络(包括GPRS和3G等)则为无线互联网应用提供了强大的技术支持。 相似文献
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本文主要讨论了宽带有线接入技术在业务、市场、技术、应用等方面的需求分析,并着重比较了当今主流的几种有线接入网技术,旨在为各个层面的用户提供最合适的技术方案。 相似文献
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汪潇瀚 《智能建筑电气技术》2004,3(3):7-69
本文介绍InnerMobile^TM无线综合覆盖系统,该系统采用宽带覆盖系统满足乃至可预见未来的各运营商对无线容量和技术的要求,以及服务于整个楼宇用户的各种类型的无线应用需求。 相似文献
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孙波 《智能建筑电气技术》2013,(4):92-95
现在的新兴建筑在设计之初都采用了预埋有线式门禁系统来保障安全。而对于一些现有和老式建筑,若增加门禁系统来提升安防级别。需要对现有建筑的电气电路进行改造,布线和施工的难度大、成本高。因此,开发无线安防门禁系统就显得尤其重要。 相似文献
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论述一种智能住宅小区宽带网新的接入方式——EPON/GPON方式,与目前常用接入方式比较,具有较大优越性,是接入网未来的发展方向。 相似文献
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随着Internet的发展和电子技术的不断进步,Internet应用逐渐向工业控制领域渗透,In-ternet进入“嵌入式Internet”时代.笔者介绍了几种比较成熟的嵌入式Internet接入方案,分析了它们的实现和特点,指出了各种接入方案适用的不同环境,并提出一种使用GPRS网络的无线接入方案,阐述了该方案的软硬件结构. 相似文献
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随着技术的不断进步,全覆盖、高接入带宽、多重认证安全将是博览中心无线建设的亮点。本文以某项目的为例讲述了博览中心的无线网络规划。 相似文献
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Yasemin Nielsen Ozan Koseoglu 《Tunnelling and Underground Space Technology incorporating Trenchless Technology Research》2007,22(3):252-261
Emerging collaborative technologies and working methods often require tremendous engineering and organisational efforts for successful implementation of information and communication technologies (ICTs). According to a research conducted in Turkish construction industry, most of the problems that occur during the construction phase are due to lack of co-operation and communication between designers and contractors and lack of prompt expert decisions during on-site engineering. Similar to any major construction project, tunnelling project’s success is highly dependent on collaborative team work where communication and information exchange take place between project members. Distributed collaborative teamwork, as the case in most of the large scale construction projects as well as tunnelling projects, empowered by state of the art information and communication technology, promises more efficient work processes, reduced travelling needs, and increased opportunities for project communication. Following the fast development of mobile computing in recent years, many sectors have adopted mobile devices and wireless technologies enabling real-time information transfer thereby improving business processes. For some years, the feasibility of implementing wireless solutions to construction sites has been researched. Potentially, mobile and wireless technologies enable construction staff to be more flexible in terms of location and time. For better use of mobile collaboration in construction projects, mobile technologies and construction sector have to be examined in some detail to implant the most suitable technology for real-time information access and improved collaboration of distributed teams in construction. However, case studies in construction are very limited in number and scope. This paper discusses and proposes an implementation scenario of wireless networking in Marmaray; a multi-site tunnelling project in Istanbul. Benefits, possible problems and cost assessments are discussed. 相似文献
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Site monitoring is an indispensable procedure in construction quality control. It does not only minimize construction defects and human errors but also supports project team members making strategic decisions at critical points throughout the construction stages. This paper presents a cost-effective construction site monitoring system integrating a long-range wireless network, network cameras, and a web-based collaborative platform. The system supports simultaneous user access therefore project team members could view real-time captured images or video of a construction site, discuss and exchange ideas with gadgets such as video conference, text and shared whiteboard at a distance via the Internet. It was carefully configured in order to maintain the reliability under the reactive conditions of the construction sites. The system has been implemented and tested on two construction sites and promising results were obtained. 相似文献
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大体积混凝土结构长期应变监测系统是近年应用于建筑工程管理与维护的一项新技术,具有重要的工程价值。无线振弦传感器具有抗干扰强,精度高,传输距离远等特点,广泛应用于大体积混凝土结构中长期应变的测量。本文主要论述了大体积混凝土结构长期应变监测系统结构和无线振弦传感器工作原理,设计了振弦传感器内部的激振电路及测频电路,以及无线通讯模块,分析了无线振弦传感器的特性。无线的设计极大的方便了振弦传感器的使用,通过工程实际应用显示,本文设计的基于正弦传感器的大体积混凝土结构长期应变监测系统稳定、质量可靠、测量数据迅速准确。 相似文献