第三代移动通信的小区规划（下）

对第三代移动通信中的WCDMA系统小区规划中基站数目的确定作了全面的阐述。首先从满足话务量角度出发计算最小基站数目，然后从覆盖角度计算出最小基站数目，最后综合两种计算方法的结果。     

谈3G无线网络规划

1、3G无线网络的规划原则 1．13G无线网络规划内容 3G无线网络规划包括在各种情况下计算链路预算、容量和小区基站数目，同时要对基站覆盖进行预测，对其参数进行规划。除此之外，还需要对整个网络进行策划，计算基站中信道单元的数目、传输线路容量、基站控制器、交换机等其他单元的数目。在规划中需引入性能测量，如掉话率和闭塞等指标，用它们来衡量网络性能。     

GSM/WCDMA网络共基站建设分析

3G网络牌照发放日益临近,从充分利用现有网络资源角度出发,GSM网络运营商宜采取GSM／WCDMA网络共基站建设。本文从3G网络规划的覆盖要求分析了3G／2G基站共站址的可行性。然后,对系统干扰进行了分析,得出隔离度要求并计算了隔离距离,给出了工程改造的隔离建议;最后,从机房和天面两个方面,对共基站配套改造建设进行了分析。     

CDMA系统容量的误区分析及对WCDMA规划的启示

从码分多址系统独特的技术特点出发,分析了CDMA、WCDMA基站的容量与GSM系统的差别,总结CDMA、WCDMA基站容量的计算方法,并给出了各种场景下基站语音业务容量的计算结果。     

论基站设备环境监控系统的发展趋势

随着通信事业的迅猛发展,各种数据业务及多媒体业务日益增多,网络覆盖范围不断扩大,基站数目急剧增加,其特点是基站规模大小不一,设备种类与数量不多,并以无人值守的基站为主.稳定的基站设备和优良的基站环境是保障通信网络质量的必要条件.本文从基站设备环境维护的现状出发,阐述监控系统的发展过程及其重要作用,提出智能化、网络化和总线方式管理的发展方向,使基站管理从传统管理向计算机集中控制管理模式转变.     

浙江铁塔智慧节能机房

针对浙江铁塔客户的基站配套需求,从满足要求及节约投资并举的角度出发,减少征地面积和协调难度,大力推进基站机房建设.     

TD-SCDMA基站和WCDMA基站的共存分析

主要探讨了WCDMA系统与TD—SCDMA系统基站间的共存问题，并从邻频干扰的角度进行了深入的分析；采用确定性计算方法和静态仿真方法研究TD—SCDMA基站对WCDMA基站产生的邻频干扰，并分析了采用智能天线后带来的改善。     

关于通信基站防雷接地技术分析

移动通信基站的主要功能是发射信号、传输数据,基站的安全运行,直接影响到通信质量.本文从防雷角度出发,首先介绍了雷电对移动通信基站的危害,然后分别阐述了基站的防雷设计和接地技术,以供参考.     

无线基站节能减排技术综述

随着移动通信系统的不断发展,网络建设规模不断扩大,节能减排已成为移动通信运营的一个重要环节。本文总结归纳了移动基站节能减排的方法,从基站供电方案,基站部署方式,MIMO天线功率控制技术等角度出发,综合探讨无线基站的节能减排有效性。     

移动基站的防雷与接地分析

从基站防雷重要性出发，分析基站遭雷击入侵情况，讨论基站防雷接地系统组成并提出基站防雷接地措施方法，最后强调防雷系统维护保养。     

A smart technique for determining base-station locations in anurban environment

With the increasing demand for cheaper and better wireless communication services from customers, and the tendency to move toward smaller cell sizes, it is becoming very important to optimally design the cell geometry and deploy the minimum number of base stations to provide maximum possible coverage. We consider how to optimally determine the locations for the placement of base stations for a wireless system in an urban setting, given the cell coverage. An algorithm is presented that determines the optimal locations of the base stations without performing an exhaustive search. Using this algorithm, a 20-25% decrease in the number of base stations required has been observed for simulated environments. The computational complexity of the proposed algorithm is also discussed     

Probability distributions for the number of radio transceivers which can communicate with one another

This paper considers points which can communicate with one another and which are uniformly and randomly distributed on the plane, assuming an inverse power law for attenuation and log-normal shadowing. First, a probability distribution is obtained for the distance between a pair of such points. Communication is assumed to be possible if the attenuation of a signal transmitted from one point, say a mobile phone, does not exceed some specified value by the time it reaches the other, say a base station. The probability distribution of the number of base stations which can hear such a signal from a given mobile is found. An example shows how the probability that a mobile is in a handover region between two or more base stations can be evaluated. The analysis is extended to the case where the power law changes at a specified distance from the mobile, and also to consider the effect of an area within the plane containing a greater density of mobiles and/or base stations (a hot spot). A final result gives the conditional distribution for the number of base stations within some specified area of the plane, given the number within some larger area containing that specified area. The results also apply to the number of mobiles within range of a base station and, in an ad hoc network, to the number of nodes within range of a given node.     

基于多点协作联合传输的超密集组网性能分析

超密集组网的基站高密度特性会带来严重的小区间干扰,多点协作联合传输应用于超密集组网进行干扰管理是目前的研究热点,该文对多点协作联合传输时基站密度对网络性能的影响进行了分析。首先采用随机几何方法推导了3维空间基站与用户距离的概率密度函数,为选取距离用户最近的多个基站联合传输的协作机制提供了基础;然后结合有界双斜率路径损耗模型,进行用户下行链路的干扰建模,进一步推导出用户下行链路覆盖率和网络区域频谱效率的表达式,并分析了协作基站数、基站密度等参数对网络性能的影响。数值仿真表明:协作基站数为2时就可使下行链路覆盖率增加10%,且实现2到3倍的频谱效率的增益,当协作基站数为3时,费效比更优,同时可得到多点协作下的基站密度极限使区域频谱效率最高。该文工作可为下一代移动通信网络的基站部署提供理论支持。     

An Algorithm for the Design of a Cost-Optimized Topology for the Fixed Part of a GSM Network

1　ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｆｉｒｓｔＧＳＭｍｏｂｉｌｅｎｅｔｗｏｒｋｓｃａｍｅｉｎｔｏｏｐ ｅｒａｔｉｏｎｉｎｔｈｅｅａｒｌｙｎｉｎｔｉｅｓ.Ｓｉｎｃｅｔｈｅｎ ,ｔｈｅｒｅｈａｓｂｅｅｎａｔｒｅｍｅｎｄｏｕｓｉｎｃｒｅａｓｅｏｆｓｕｂｓｃｒｉｂｅｒｓａｎｄａｃｏｎ ｔｉｎｕｏｕｓｅｘｐａｎｓｉｏｎｏｆｔｈｅｎｅｔｗｏｒｋｉｎｆｒａｓｔｒｕｃｔｕｒｅ .Ａｍｏｎｇｓｍａｌｌｅｒｎｏｄｅｓｆｏｒｓｕｂｓｃｒｉｂｅｒｓａｎｄｅｑｕｉｐ ｍｅｎｔａｄｍｉｎｉｓｔｒａｔｉｏｎ .Ｔｈｅｓｗｉｔｃｈｉｎｇｐ…     

Performance approximation of a multi-base station slotted ALOHA forwireless LAN's

It has been reported that the capture effect can improve the performance of slotted ALOHA systems. Further improvement can be expected when the number of base stations is increased. The performance of such slotted ALOHA systems with multiple base stations is analyzed with the aid of the equilibrium point analysis. Not only the capture effect but also the packet dropping due to the finite number of retransmission trials are taken into account. The numerical results indicate that the finite number of retransmission trials mainly contributes to the improvement of the packet dropping probability in the range of the light input traffic, while the number of base stations mainly contributes to the improvement of the overall throughput and the average transmission delay in the range of the heavy input traffic     

A Method for Determining the Number of Base Stations Connected to a BSC in CDMA Cellular Communication Systems

The number of base stations connected to a BSC (Base Station Controller) should be determined by the capacities of CCP (Call Control Processor) and the other resources of the BSC. We can specify the capacity of the BSC in terms of the rates of call connections, soft handoffs, pagings and location registrations. In this paper, we will calculate the occurrence rates of call connections, soft handoffs, pagings and location registrations in the service area of the BSC when the number of base stations connected to the BSC is known. Based on the formulae for the occurrence rates, a method for determining the number of base stations connected to the BSC will be proposed.     

影响基站应急供电的典型问题分析

随着移动通信的迅速发展,移动基站数量剧增,同时由于经济快速发展造成的电力短缺和日益增多的灾害性天气都给基站的正常运行带来严重的影响,应急油机成为基站应急供电的重要保障。文章着重探讨了在使用应急油机的过程中一些比较重要又容易被维护使用人员忽视的问题,并提出了解决办法。     

5G网络中基于覆盖区域优先级的微基站休眠算法

随着5G移动通信技术日渐成熟，移动终端数量快速增长，5G无线通信系统基站密集能耗问题突出，提出一种微基站区域分级休眠算法。考虑微基站负载、站间距离、层间配合对微基站休眠的影响，宏基站与宏基站之间重叠覆盖区域中微基站状态转换次数少，优先休眠操作节能效果好。仿真结果表明，节能率为23%，能适应不同的网络规模，在大规模网络中节能效果更优越。     

拉远站传输接入方案探讨

目前4G网络建设进入高速发展期,随着移动网络建设速度的加快,拉远基站凭借成本低,适应环境的能力强,工程建设方便的优势,在工程建设中得到了越来越多的应用.本文对如何为大量建设的拉远基站提供快速有效的传输接入方式提出了几种解决方案,对于将来的4G拉远基站的大规模建设提供了参考模型.