室外Wi-Fi网状网在农村的发展和应用

基于Wi-Fi的室外无线网状网因具有高带宽、低价格、可扩展、易维护等优势.近年来在热点覆盖、无线城市等领域的应用迅速发展,其低成本优势也使室外无线网状网成为农村无线宽带覆盖的最有竞争力技术之一.中国科学院计算技术研究所在北京怀柔区渤海镇北沟成功地建设了一个覆盖130多个用户的无线网状网.本文讲述在建设中遇到的问题与积累的经验,以及关于建设宽带Wi-Fi乡村的技术和商业问题的探讨.由于用户需求的刚性,作者认为在农村发展宽带无线网络比无线城市更有优势.     

大楼基础网络WIFI覆盖优化

园区新大楼入住后,iPhone、iPad、andriod用户激增,不少用户反映基础网络在办公区WIFI覆盖不足.本文分析了整个园区的无线用户使用情况、AP部署以及网管报告后,设计了一套测试方案,对WIFI信号覆盖做了的调整测试,最终确定了增强覆盖的实施意见.     

′99北京无线通信设备展专辑：一个年青的以色列公司“Foxcom Wireless”

随著无线通信行业的飞速发展，高性能移动通信的需求也在增长。这个行业面对的一个最重要的挑战是给无线用户提供可靠的覆盖，同样人们增长了对无线通信的期望，用户需要在包含室内、室外、城市、乡村和一些偏僻的地方通信。Foxcom Wireless公司以先进的光纤技术致力满足这些需求，为无线行业提供高性能且经济的解决方案。     

CloudBBU在上海迪士尼园区的试点方案及性能分析

【】：为应对上海迪斯尼园区大客流对通信服务的需求,迪士尼园区部署了高密度的室外4G街道站,用以吸收话务、提升用户体验。但随之也带来了站址过密、小区间重叠覆盖较多等问题。本文介绍了在迪士尼园区试点部署CLoudBBU的方案,并对其网络提升情况进行了分析,在此基础上,提出了在大网审慎推广部署CloudBBU的相关建议。     

大型主题园区公众移动通信无线网络设计方案

文章主要针对大型主题园区的特殊无线环境和通信需求,在分析典型主题园区人流分布特性、无线覆盖设计和工程建设难点的基础上,对高话务密度的典型主题园区的公众移动通信网络的集约化建设方案进行探讨。     

高楼室内无线信号覆盖创新方案研究

随着我国经济的迅猛发展,城市建设的步伐逐步加快,很多栋高楼迅速被建起,人们在高楼中工作和生活的时间也逐渐变长,对高楼内的无线信号覆盖的要求也越来越高,保证高楼中人们的正常通信已经成为运营商无线信号覆盖的重要组成部分。由于高楼中墙壁对无线信号的遮挡等各种原因,室内用户手机信号比较弱,经常出现通信异常。本文通过新的无线信号覆盖解决方案,解决无线信号覆盖问题,满足高楼中室内用户的通信需求。     

面向5G的智慧园区蜂窝网络基础设施部署方案

面向智慧园区的建设和5G时代的到来,移动通信业务由标准化走向快速创新,本文结合某产城融合型智慧园区无线网络部署案例,探讨了面向5G的智慧园区业务需求,提出了采用UCNC架构的无线组网模式,并给出了室外宏站、微站和综合机房的部署需求和建议。     

基于GSM-HI的农村无线宽带覆盖方案研究

农村无线宽带覆盖已是农村信息化建设的重中之重,然而目前的覆盖技术均难以满足农村高速率、远距离的需求,为解决以上问题提出了GSM-HI技术,在原有GSM网络基础上进行宽带化演进升级,实现了GSM远覆盖和LTE高速率的优势结合,并通过测试验证了GSM-HI对室外及室内良好的覆盖性能。GSM-HI技术满足农村无线宽带覆盖需求的同时降低了建设成本,对于农村无线宽带建设具有一定的指导意义。     

基于商业街的WLAN室外覆盖研究

WLAN室外覆盖是WLAN进行商业化运营的重要环节,也是各运营商业务发展的重要手段。商业步行街人口密集、业务发展价值大,是各运营商必争的业务发展区。但是由于人口稠密、建筑较多、无线环境复杂,导致WLAN覆盖时效果和用户体验极不稳定,因此对商业街的WLAN室外覆盖研究非常有必要。通过对商业步行街的WLAN室外覆盖进行实测分析以及在覆盖方式上进行探讨,得出了优化方案。     

小区WLAN无线接入方案

一、引文 过去无线局域网技术（WLAN）通常被用于室内的热点覆盖,随着人们对无线接入范围的不断扩大以及室内区域无线接入系统的完成,室外区域成了无线接入新的热点。由于室内外环境差异及覆盖要求的改变,室内无线接入的经验难以适用于室外小区,本文将介绍几种适用室外无线热点WLAN覆盖的无线接入方案,并说明各方案的特点及使用场景。     

WLAN无线接入网络规划及其网络性能优化研究

随着WLAN无线的发展,其覆盖区域、用户量、网络容量不断增加,使其接入网络规划的问题逐渐成为建设公共无线局域网的重要问题.同时,对WLAN无线接入网络性能优化是满足用户需求的关重要手段,网络性能优化主要有覆盖优化、容量优化、设备优化.     

QoS Routing for Mesh-Based Wireless LANs

Wireless LANs with their increased data rate become an attractive technology for connecting mobile users to the Internet. Efficient deployment of wireless LANs will require the ability to extend the wireless LANs coverage without the need to deploy a very large number of access points. Mesh-based wireless LANs are an attractive solution to this problem. These networks extend wireless LAN coverage by using each node in the network as a router, resulting in a multihop topology. In this paper we introduce a novel routing algorithm, wireless mesh routing (WMR), that provides quality-of-service (QoS) support and accounts for the characteristics of both infrastructure-based wireless LANs and ad hoc networks. The algorithm is validated using the OPNET modeler. The simulation results show that the mesh network using WMR protocol can provide QoS support and react dynamically to the network status changes with low control overheads. Using the proposed software architecture the proposed routing protocol can be implemented with any MAC protocol, resulting in easy implementation in existing wireless nodes.     

SATELLITE-ENHANCED PERSONAL COMMUNICATIONS EXPERIMENTS

Users of future generation wireless information services will have diverse needs for voice, data, and potentially even video communications in a wide variety of circumstances. For users in dense, inner-city areas, low power personal communications services (PCS) technology should be ideal. Vehicular-based users travelling at high speeds will need high-power cellular technology. For users in remote or inaccessible locations, or for applications that are broadcast over a wide geographic area, a satellite technology would be the best choice. Packet data networks provide an excellent solution for users requiring occasional small messages, whereas circuit switched networks provide more economical solutions for larger messages. To provide ubiquitous personal communications service, it is necessary to capitalize on the strength of each wireless technology and network to create one seamless internetwork including both current and future wired and wireless networks. As an initial step in exploring the opportunities afforded by the merging of satellite and terrestrial networks, Bellcore and JPL conducted several experiments. These experiments utilized Bellcore's experimental personal communications system (including several messaging applications with adaptations to wireless networks), NASA's advanced communications technology satellite (ACTS), JPL's ACTS mobile terminal, and various commercial data networks (such as the wireline Internet and the RAM wireless packet data network). Looking at loss of bits, packets and higher layer blocks (over the satellite-terrestrial internetworks with mobile and stationary users under various conditions) our initial results indicate that the communication channel can vary dramatically, even within a single network. We show that these conditions necessitate powerful and adaptive protocols if we are to achieve a seamless internetworking of satellite and terrestrial networks.     

5G无线通信技术概念及其应用研究

科技水平的快速发展极大地促进了互联网企业的发展。新技术的运用使通信方式的传输速度大幅度提升,为人们的生活带来极大的便利,也为网络使用者提供更优质的上网体验。5G无线通信技术在广播电视传播等领域的广泛应用,进一步体现了我国数据传输速度的先进的水平。文章就5G无线通信技术概述及其在广播电视传播平台建设中的应用进行分析和探讨。     

Viva mesh Vegas [mesh wireless network]

In this paper, the mesh wireless network established by Cheetah Wireless Technologies Inc. is discussed. Cheetah's mobile wireless network is one of the first municipal installations to use mesh wireless technology, which allows users to access the Internet anywhere within the coverage area even if they're driving at 100 kph. Mesh networks have several key advantages over traditional wireless solutions, such as Wi-Fi or cellphones. Benefits include higher speeds, less susceptibility to radio interference, and greater resistance to network congestion. These networks also offer better coverage, the ability to prioritize different types of users, geolocation capabilities, tighter security, faster deployment, and a degree of immunity to catastrophic network failures.     

WLAN无线网络覆盖解决方案研究

目前,无线局域网（WLAN）应用发展迅速,国内各运营商在集中精力做好现有网络建设的同时,对WLAN网络建设提出了更高目标,要求进一步提高网络运营能力。这里首先从无线传播环境、业务需求等角度提出WLAN网络建设目标场景分类方案和网络建设思路,然后根据实际WLAN网络热点区域聚类分析,探讨各类场景无线覆盖解决方案,包括室内共分布系统、室内独立放装、室外共分布系统和室外独立基站等多种建设方式,有效地指导了WLAN网络建设,提高了建设效率和质量。     

Internet Connectivity for Ad Hoc Mobile Networks

The growing deployment rate of wireless LANs indicates that wireless networking is rapidly becoming a prevalent form of communication. As users become more accustomed to the use of mobile devices, they increasingly want the additional benefit of roaming. The Mobile IP protocol has been developed as a solution for allowing users to roam outside of their home networks while still retaining network connectivity. The problem with this solution, however, is that the deployment of foreign agents is expensive because their coverage areas are limited due to fading and interference. To reduce the number of foreign agents needed while still maintaining the same coverage, ad hoc network functionality can cooperate with Mobile IP such that multihop routes between mobile nodes and foreign agents can be utilized. In this work, we present a method for enabling the cooperation of Mobile IP and the Ad hoc On-Demand Distance Vector (AODV) routing protocol, such that mobile nodes that are not within direct transmission range of a foreign agent can still obtain Internet connectivity. In addition, we describe how duplicate address detection can be used in these networks to obtain a unique co-located care-of address when a foreign agent is not available.     

现代无线通信技术的现状分析及其发展前景

随着科技的进步,无线通信技术已经逐步渗透到人们生产生活的各个领域。为了满足人们持续更新的各种需求,文章详细分析了现代无线通信技术的发展现状,并基于此探讨了其相应的发展前景。