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type="text/css"></style> <div id="ct" class="ct2 wp cl"> <div class="mn"> <div class="bm_haa cl"> <div class="bm_h cl"> <a href="http://www.oecr.com/portal.php?mod=rss&catid=57" class="y xi2 rss" target="_blank" title="RSS">订阅</a><h1 class="xs2">文章</h1> </div></div> <div class="kjkjb"> <div class="bm vw" style="margin-bottom:0;"> <div class="h hm"> <div class="zxtoux"><img src="http://www.oecr.com/uc_server/avatar.php?uid=114036&size=small" /></div> <h1 class="ph">华为在431km/h磁悬浮上体验LTE </h1> <p class="xg1"> 时间：2011-5-9 20:44<a class="zz" href="home.php?mod=space&uid=114036">作者：duller</a> 阅读<em id="_viewnum">(1017)</em> 评论: 0</p> <div class="zxfb" ><a href="http://www.oecr.com/portal.php?mod=rss&catid=57" class="y xi2 rss" target="_blank" title="RSS">订阅</a></div> </div> <!--[diy=diysummarytop]--><div id="diysummarytop" class="area"></div><!--[/diy]--> <div class="s"> <div class="ss"><div><span>导读： </span>为时速431Km/h的磁悬浮列车部署LTE网络，无疑是对无线通信技术的巨大考验。高铁通信面临切换、多普勒效应、车体损耗等诸多问题，速度越快，技术难度越高。然而，高速铁路是未来交通运输的发展方向，高铁通信虽然难度 ...</div> </div> <!--[diy=diysummarybottom]--><div id="diysummarybottom" class="area"></div><!--[/diy]--> <div class="d"> <!--[diy=diycontenttop]--><div id="diycontenttop" class="area"></div><!--[/diy]--> <table cellpadding="0" cellspacing="0" class="vwtb"><tr><td id="article_content">为时速431Km/h的磁悬浮列车部署LTE网络，无疑是对无线<a href="http://ofc.oecr.com" target="_blank" class="relatedlink">通信</a>技术的巨大考验。高铁通信面临切换、多普勒效应、车体损耗等诸多问题，速度越快，技术难度越高。然而，高速铁路是未来交通运输的发展方向，高铁通信虽然难度大，但用途将越来越广泛。正因为如此，华为在上海的磁悬浮列车线上部署了LTE试验网络，用来试验高铁通信的最新技术。 <BR><BR>上海磁悬浮轨道全长31km,列车全程运行时长7分20秒，最高时速431km/h。为了避免与机场的无线电干扰，华为在磁悬浮轨道的20km部分部署了LTE网络。据华为工作人员介绍，这次华为部署的LTE网络为FDD LTE，采用2.GHz频段，全程共部署8个基站，12个小区，使用带宽20MHz，采用2*2的MIMO天线技术。 <BR><BR>华为工作人员在列车快速行进中演示了LTE网络的下载性能。在这次演示中，下载速率最高可以达到50Mbps。据华为工作人员介绍，这张LTE网络的下载<a href="http://theory.oecr.com" target="_blank" class="relatedlink">理论</a>值应该为120Mbps，而受限于中国电信的传输网络，目前下载只能达到50Mbps。在保持这个速率的同时，网络的切换成功率在99.5%以上。 <BR><BR>当记者问及工作人员能否下载视频或文件进行演示时，华为的工作人员表示，目前的这张LTE网络还属于试验阶段，位于上海研究所的EPC没有连接到互联网。 <BR><BR>华为的工作人员告诉记者，对于高铁通信来说，华为除了在技术上走在世界领先行列外，与国外知名厂商相比，华为最大的优势在于工程施工。往往是几家设备商共同签署项目合同，但华为的工程施工速度远远领先于其他厂家，因此赢得了更多的订单。 作者：卢子月 来源：通信产业报</td></tr></table> <!--[diy=diycontentbottom]--><div id="diycontentbottom" class="area"></div><!--[/diy]--> <script src="data/cache/home.js?eOg" type="text/javascript"></script> <div id="click_div"><table cellpadding="0" cellspacing="0" class="atd"> <tr><td> <a href="http://club.oecr.com/home.php?mod=spacecp&ac=click&op=add&clickid=1&idtype=aid&id=2006&hash=dfd21dc1c07edbd0b02728beb632ace7&handlekey=clickhandle" id="click_aid_2006_1" onclick="showWindow(this.id, this.href);doane(event);"> <img src="static/image/click/jidan.gif" alt="" /><br />鸡蛋</a> </td> <td> <a 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