在铁路通信系统中，GSM-R与时延抗争的“成长史”
<div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/pgc-image/32a039da9d664762b7d6b35b51017a8d~noop.image?_iz=58558&from=article.pc_detail&lk3s=953192f4&x-expires=1725645832&x-signature=3ge6XyjgNUrhc%2BARWfRftXAd4nI%3D" style="width: 50%; margin-bottom: 20px;"></div>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">“哐当哐当哐当~~”</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">当<span style="color: black;">咱们</span>坐在一辆飞驰的火车上</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">车厢里，有的乘客在打<span style="color: black;">tel</span></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">“喂，我刚上车，别担心了...”</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">乘务员拿着对讲机，确认车厢<span style="color: black;">状况</span></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">“13号车厢，<span style="color: black;">无</span>需要补票的...”</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">列车长和即将停靠的站点地勤核对<span style="color: black;">信息</span></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">“是的，还有<span style="color: black;">非常</span>钟进站，请做好接车准备...”</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">铁轨上，列车飞驰</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">车内、车厢之间、车与铁道……</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">是<span style="color: black;">快速</span>发展的通讯技术将<span style="color: black;">大众</span>和列车紧密相连</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;">叮，GSM-R上车</strong></p>
<div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/pgc-image/3481968158da4b8cb5e7dfa39d97ff6a~noop.image?_iz=58558&from=article.pc_detail&lk3s=953192f4&x-expires=1725645832&x-signature=wxb1hY2oOtUcPf0tyhTdCnAg%2BAo%3D" style="width: 50%; margin-bottom: 20px;"></div>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">GSM，<span style="color: black;">全世界</span>移动通信系统</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">GSM-R，专门为铁路调度通信设计</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">综合专用数字移动通信系统</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">细心的<span style="color: black;">伴侣</span><span style="color: black;">发掘</span>多一个“R”</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">那样</span>，多了<span style="color: black;">那些</span>东西呢？</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">原来在GSM的<span style="color: black;">基本</span>上</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">该系统<span style="color: black;">增多</span>了基于位置和功能寻址等功能</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">这适用于铁路通信</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">尤其</span>是铁路专用调度通信的需要</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">说了这么多</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">你可能觉得还是太抽象</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">简而言之</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;">它<span style="color: black;">重点</span><span style="color: black;">供给</span>无线列车调度、</strong></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;">编组调车通信、区段养护维修作业通信、</strong></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;">应急通信等语音通信功能</strong></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;">为列车自动<span style="color: black;">掌控</span>与检测信息<span style="color: black;">供给</span>数据传输通道</strong></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;">在GSM-R上车前</strong></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">有一句话叫做：</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;">条条大路通罗马！</strong></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">在GSM-R中，无线信号的传播<span style="color: black;">亦</span>是如此</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">一个信号从基站出发</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">经过了空间，经过山体和<span style="color: black;">高挑</span>建筑物的反射</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">经过直放站后中继...</p>
<div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/pgc-image/ec7ba69325b14fedb43f4faedc544a02~noop.image?_iz=58558&from=article.pc_detail&lk3s=953192f4&x-expires=1725645832&x-signature=mtGvY92IBLqI2H5vk8xjIJ5tHEY%3D" style="width: 50%; margin-bottom: 20px;"></div>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">就像是<span style="color: black;">无</span>标准答案的连线题</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">同一个信号<span style="color: black;">因为</span>传播路径<span style="color: black;">区别</span>、</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">在<span style="color: black;">区别</span>时刻到达接收端</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">都会<span style="color: black;">显现</span>多径传播的<span style="color: black;">状况</span></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;"><span style="color: black;">区别</span>路径的相同信号在接收端叠加</strong></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;">增大或减小信号的能量的<span style="color: black;">状况</span>自然<span style="color: black;">显现</span></strong></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">亦</span>形成多径干扰或时延干扰 </p>
<div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/pgc-image/2140fa1a7ef7444ea23ee456d3a90be4~noop.image?_iz=58558&from=article.pc_detail&lk3s=953192f4&x-expires=1725645832&x-signature=e2mUtbIzA94IjzpKTJcnJuWWNEw%3D" style="width: 50%; margin-bottom: 20px;"></div>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;">在GSM-R上车后</strong></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">GSM-R多了个“R”当然不是<span style="color: black;">安排</span></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">创立</span>在GSM规范协议上的</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;">能够处理的多径信号时延差最大为4TA（约15us）</strong></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;">这，才是<span style="color: black;">优良</span>所在</strong></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">当多径信号的时延差大于4TA</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">且多径信号的场强差值</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">不大于GSM系统的同频干扰<span style="color: black;">守护</span>比时</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">多径信号<span style="color: black;">导致</span>接收机的载干比C/I恶化</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">通俗一点，<span style="color: black;">便是</span>会影响通信质量</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">质差严重时会<span style="color: black;">引起</span>掉话</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">这<span style="color: black;">便是</span>无线覆盖的时延干扰</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">时延干扰<span style="color: black;">导致</span>C/I恶化的测试图如下： </p>
<div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/pgc-image/d53fc0306f274cf3b178c75b75e2361e~noop.image?_iz=58558&from=article.pc_detail&lk3s=953192f4&x-expires=1725645832&x-signature=ZEkaahJ2bVy5j8qsO7EqB1YB1D0%3D" style="width: 50%; margin-bottom: 20px;"></div>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">然则</span>，GSM-R采用单网交织冗余覆盖的线路</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">在路堑和隧道区域<span style="color: black;">运用</span>的光纤直放站</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">亦</span><span style="color: black;">持有</span><span style="color: black;">供给</span>交织冗余覆盖的能力</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">每一个</span>直放站远端机需要接入相邻两个BTS的信号</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">合成的信号分别馈送至两边</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">与直放站连接的漏泄同轴电缆或天线</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">多了一个“R”<span style="color: black;">便是</span>多了一个放大镜</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">系统<span style="color: black;">恰当</span>调节放大来自两个BTS信号的强度</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">安排切换区</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">使得每段漏泄同轴电缆两端均连接直放站</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">漏泄同轴电缆两端</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">同期</span>接收<span style="color: black;">区别</span>直放站的信号</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">下图<span style="color: black;">便是</span>GSM-R光纤直放站单网交织冗余覆盖<span style="color: black;">方法</span>示意图：</p>
<div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/pgc-image/6e8be11a664c4e6f805571ed2c35b392~noop.image?_iz=58558&from=article.pc_detail&lk3s=953192f4&x-expires=1725645832&x-signature=jJkretLKkyflDxSTZaZzmw6D7ZY%3D" style="width: 50%; margin-bottom: 20px;"></div>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;">当GSM-R与时延相碰</strong></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">GSM-R网络中</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">直放站在单层网交织覆盖环境下</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">为了<span style="color: black;">保准</span>冗余基站的信号能够完全覆盖邻近基站</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">该基站<span style="color: black;">经过</span>直放站转发的信号</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">亦</span>必然与基站<span style="color: black;">自己</span>信号完全重合</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">一个员工既要做分内工作</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">又要帮同事分担部分工作</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">那样</span>，他便容易进入“超负荷”状态</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">基站传递信号<span style="color: black;">亦</span>是如此</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">在GSM-R网络覆盖区域中</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">有可能<span style="color: black;">出现</span>基站<span style="color: black;">自己</span>信号</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">与<span style="color: black;">经过</span>直放站转发的本站信号</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;"><span style="color: black;">导致</span>的多径时延超出系统<span style="color: black;">需求</span></strong></p>
<div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/pgc-image/bc79e4ef62ee47ea9580dbc2eb1c5550~noop.image?_iz=58558&from=article.pc_detail&lk3s=953192f4&x-expires=1725645832&x-signature=KWbcb%2F9I1eUQjbeOClMe6kWwf1U%3D" style="width: 50%; margin-bottom: 20px;"></div>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">按照</span>单网交织覆盖线路的特点</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">可能<span style="color: black;">出现</span>时延干扰的<span style="color: black;">状况</span><span style="color: black;">通常</span>有以下两种<span style="color: black;">状况</span>：</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">1.基站与其连接的直放站</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">如下图的<span style="color: black;">状况</span>：</p>
<div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/pgc-image/62eabe4942514c689ff8ed38c2bc36c1~noop.image?_iz=58558&from=article.pc_detail&lk3s=953192f4&x-expires=1725645832&x-signature=eI%2BV%2Bs81FtmvJTH9985p23LOmBQ%3D" style="width: 50%; margin-bottom: 20px;"></div>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">在基站（上图中SheXianBei）</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">与直放站（上图中SheXianBei/R2）之间的区域</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">由基站和直放站<span style="color: black;">一起</span>覆盖</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">直放站的主信号与基站同源</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">因此呢</span>，该区域有可能产生时延干扰<span style="color: black;">状况</span></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">经过</span>分析计算：</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">基站与其直放站距离D≥0.94km时</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">基站和直放站的信号重叠覆盖</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">就可能产生时延干扰</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;"><span style="color: black;">实质</span>工程中<span style="color: black;">通常</span>采用以下<span style="color: black;">办法</span>克服时延干扰：</strong></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">经过</span><span style="color: black;">调节</span>基站和远端机天线方位角</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">使<span style="color: black;">出现</span>时延超标的区域落在线路外侧；</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">在<span style="color: black;">保准</span>场强覆盖的前提下</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">适当降低远端机输出功率；</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">2.同一近端机连接的远端机之间</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">如下图的<span style="color: black;">状况</span>：</p>
<div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/pgc-image/f505d2e35ee54fcc89b0d3d9f366d06f~noop.image?_iz=58558&from=article.pc_detail&lk3s=953192f4&x-expires=1725645832&x-signature=1rM4Xg5AllvIAlZwrcWaQSwDq1w%3D" style="width: 50%; margin-bottom: 20px;"></div>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">在同一近端机连接的2台远端机之间</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">（上图中JingDe/R1和JingDe/R2）的</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">区域由这2台直放站远端机<span style="color: black;">一起</span>覆盖</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">因为</span>它们连接同一台近端机</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">因此</span>它们的主、从信号均同源</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">因此呢</span>，该区域的主、从信号</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">都有可能产生时延干扰<span style="color: black;">状况</span></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">经过分析计算：</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">2台直放站之间距离D≥1.48km时</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">它们的信号重叠覆盖可能产生时延干扰</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;"><span style="color: black;">实质</span>工程中<span style="color: black;">通常</span>采用以下<span style="color: black;">办法</span>克服时延干扰：</strong></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">经过</span><span style="color: black;">调节</span>远端机天线方位角</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">使<span style="color: black;">出现</span>时延超标的区域落在线路外侧；</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">在<span style="color: black;">保准</span>场强覆盖的前提下</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">适当降低远端机输出功率；</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">若工程中2台远端机外侧</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">（上图中R1左侧、R2右侧）</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">漏缆较短（<span style="color: black;">少于</span>0.8km）时</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">亦</span><span style="color: black;">能够</span>采用在时延较短的<span style="color: black;">一边</span><span style="color: black;">增多</span>短段光缆</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">赔偿</span>时延，使覆盖区中部时延差降低</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">同期</span>又不使2台远端机外侧时延差在4TA以内</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">在GSM-R系统中</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">无线信号无缝隙、连续覆盖</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">直放站与其信源基站之间、</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">同源直放站之间<span style="color: black;">必定</span>存在多径覆盖的<span style="color: black;">状况</span></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">亦</span>就有可能产生多径干扰<span style="color: black;">导致</span>的</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">质差、通信降级、掉话等<span style="color: black;">状况</span></p>
<div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p9-sign.toutiaoimg.com/pgc-image/2aaf11aad6b8439badc19d79c1cd45c2~noop.image?_iz=58558&from=article.pc_detail&lk3s=953192f4&x-expires=1725645832&x-signature=py9sQQLaQoh3%2BOEfuYbVEiGyfss%3D" style="width: 50%; margin-bottom: 20px;"></div>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">而三维通信<span style="color: black;">做为</span>直放站系统供应商</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">生产GSM-R覆盖设备</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">亦</span>必将日夜坚守，辛勤工作</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">持续</span>深化网络优化工作</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">分析判断故障<span style="color: black;">原由</span>，对症下药</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">以此<span style="color: black;">保证</span>网络安全</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">高速铁路运输安全运行</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">以及<span style="color: black;">更加多</span>铁路的顺利开通</p>
页:
[1]