LTE下载速率优化法-四维五步法
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">随着LTE网络大力建设与业务推广，LTE网络逞直线<span style="color: black;">提升</span>趋势，但随之带来的问题<span style="color: black;">亦</span>日益<span style="color: black;">显著</span>，无线环境的多样化、<span style="color: black;">繁杂</span>化，<span style="color: black;">重点</span>呈<span style="color: black;">此刻</span>LTE网络用户下载速率。<span style="color: black;">创立</span></span><strong style="color: blue;"><span style="color: black;">四维五步法</span></strong><span style="color: black;">切实<span style="color: black;">保证</span>LTE网络质量，<span style="color: black;">加强</span>LTE网络用户<span style="color: black;">运用</span>感受，<span style="color: black;">提高</span>LTE下速速率。</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;"><span style="color: black;">1、</span>什么是四维五步法</span></strong></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">四个维度（简<span style="color: black;">叫作</span>：四维）<span style="color: black;">重点</span>以网络结构、调度性能、接入保持、业务体验四个为切入点：</span></p>· <span style="color: black;">网络结构：<span style="color: black;">包含</span>弱覆盖、过覆盖、重叠覆盖、交叉干扰；</span>· <span style="color: black;">调度性能：时域调度性能、频域调度性能、无线环境到TBS调度的转换效率；</span>· <span style="color: black;">接入保持：接入性能、保持性能、切换性能；</span>· <span style="color: black;">业务体验：接通、回落、返回、速率、时延、误码。</span>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">四个维度为重要切入点，<span style="color: black;">创立</span>以下五个<span style="color: black;">提高</span><span style="color: black;">过程</span>：</span></p>· <span style="color: black;">网络结构优化：弱覆盖区域优化、重叠覆盖优化、干扰小区、故障小区处理；</span>· <span style="color: black;">网络质量<span style="color: black;">提高</span>：SINR<span style="color: black;">提高</span>；</span>· <span style="color: black;">关键性能参数：PCI参数优化、LTE邻区优化、2G/3G/4G互操作邻区优化、CSFB参数配置优化；</span>· <span style="color: black;">双层网异频优化：梳理切换带、PCI<span style="color: black;">恰当</span>优化、邻区优化；</span>· <span style="color: black;">网络调度<span style="color: black;">提高</span>：服务器、传输带宽、参数、硬件问题。</span>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">经过</span>以上优化手段来<span style="color: black;">提高</span>LTE网络用户的下载速率，其中网络结构优化和双层网异频优化是当前优化的重要手段。</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;"><span style="color: black;">2、</span>关键点：网络结构优化</span></strong></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">LTE网络结构给SINR、下载速率带来决定性影响，网络结构优化内容<span style="color: black;">包含</span>：</span></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">STEP1：<span style="color: black;">经过</span>工参、扫频数据，计算四超小区（超近、超高、超远、<span style="color: black;">过重</span>叠覆盖）；</span></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">STEP2：四超小区与路测问题点<span style="color: black;">相关</span>（弱覆盖、过覆盖、超远覆盖、频繁切换、质差路段）；</span></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">STEP3：回放路测问题点数据，分析<span style="color: black;">恰当</span><span style="color: black;">处理</span><span style="color: black;">方法</span>。</span></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">网络结构的优化，<span style="color: black;">最后</span><span style="color: black;">亦</span>是SINR质量的优化，LTE网络SINR的好坏，直接影响用户数据业务感知，SINR的<span style="color: black;">提高</span>是LTE网络质量的重中之重！</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;"><span style="color: black;">3、</span>关键点：双层网异频优化</span></strong></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">随着LTE商用网络用户数量<span style="color: black;">快速</span>扩大，部分热点区域必须采用双层网<span style="color: black;">处理</span>业务容量的<span style="color: black;">需要</span>。双层网优化从切换/重选策略、异系统/本系统互操作参数、RF优化、负载<span style="color: black;">平衡</span>策略等几个方面展开，<span style="color: black;">关联</span>工作繁复而艰巨，越来越<span style="color: black;">作为</span><span style="color: black;">平常</span>优化工作的重中之重。</span></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">双层网优化策略共分为两种：</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;">优化策略一：D为主频</span></strong><span style="color: black;">，F频段<span style="color: black;">思虑</span>TDS，不进行大幅度<span style="color: black;">调节</span>，虽然采用个性偏移参数设置<span style="color: black;">能够</span><span style="color: black;">处理</span>切换的问题，但会<span style="color: black;">引起</span>用户感知和网络KPI的下降。</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;">优化策略二：F为主频，</span></strong><span style="color: black;"><span style="color: black;">调节</span>D频段覆盖居民区，针对F频段的重叠覆盖度高的区域进行L+T联合<span style="color: black;">调节</span>，<span style="color: black;">同期</span><span style="color: black;">提高</span>LTE和TDS网络质量，但D频段穿透损耗<span style="color: black;">很强</span>，进行深度覆盖后效果欠佳，<span style="color: black;">同期</span>优化<span style="color: black;">调节</span>工作量大，短期内<span style="color: black;">提高</span>慢。</span></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">日前</span>优化过程中，综合两种策略进行<span style="color: black;">调节</span>，在快速改善LTE网络质量的<span style="color: black;">同期</span>，避免对TDS网络<span style="color: black;">导致</span><span style="color: black;">消极</span>影响。</span></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">梳理切换带，A2异频切换门限优化，其中对异频切换门限A2需精细优化，做到切换<span style="color: black;">即时</span>、GAP最短、成功率最高。</span></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">A2值设置过高，将<span style="color: black;">引起</span>异频<span style="color: black;">测绘</span><span style="color: black;">起步</span>过早，<span style="color: black;">测绘</span>周期过长工，对速率影响严重；A2设置过低，将<span style="color: black;">引起</span>切换不<span style="color: black;">即时</span>，原小区信号质量变差，<span style="color: black;">一样</span>影响速率；为<span style="color: black;">保证</span>用户的切换顺畅且避免异频<span style="color: black;">测绘</span>周期过长,需要对道路的A2门限进行基于扇区覆盖电平的精细优化。</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;">A2门限值的确定<span style="color: black;">办法</span>：</span></strong></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">异频切换<span style="color: black;">运用</span>A2+A3策略，凌晨时段将所有小区的A2门限修改为0，<span style="color: black;">始终</span>开启异频<span style="color: black;">测绘</span>，<span style="color: black;">经过</span>A3事件来统计切换点的电平强度，以此设为两个小区间的A2门限，<span style="color: black;">能够</span><span style="color: black;">保证</span>切换的<span style="color: black;">即时</span>性，<span style="color: black;">亦</span><span style="color: black;">能够</span>避免异频<span style="color: black;">测绘</span>周期过长问题。</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;"><span style="color: black;">4、</span>结语</span></strong></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">经过</span>四个维度为重要切入点，<span style="color: black;">创立</span>网络结构优化、网络质量<span style="color: black;">提高</span>、关键性能参数、双层网异频优化、网络调度<span style="color: black;">提高</span>五个<span style="color: black;">提高</span><span style="color: black;">过程</span><span style="color: black;">提高</span>LTE下载速率，<span style="color: black;">提高</span>网络用户感知和满意度！</span></p>
我深感你的理解与共鸣，愿对话长流。 你的话语如春风拂面，温暖了我的心房，真的很感谢。 在遇到你之前，我对人世间是否有真正的圣人是怀疑的。
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