<p><span><span>在中国电信、中国联通联合组织网络和芯片厂商参加的</span></span><span><span lang="EN-US">2.1GHz</span></span><span><span>（</span></span><span><span lang="EN-US">n1</span></span><span><span>）频段</span></span><span><span lang="EN-US">40MHz</span></span><span><span>带宽</span></span><span><span lang="EN-US">5G NR</span></span><span><span>和</span></span><span><span lang="EN-US">4G/5G</span></span><span><span>动态频谱共享（</span></span><span><span lang="EN-US">DSS</span></span><span><span>）外场试验中，高通技术公司和中兴通讯宣布近期在中国四川省率先完成基于商用</span></span><span><span lang="EN-US">2.1GHz</span></span><span><span>（</span></span><span><span lang="EN-US">n1</span></span><span><span>）频段的</span></span><span><span lang="EN-US">4G/5G</span></span><span><span>动态频谱共享互操作测试验证。本次测试验证基于中国电信与中国联通共享的</span></span><span><span lang="EN-US">2.1GHz</span></span><span><span>（</span></span><span><span lang="EN-US">n1</span></span><span><span>）频段中的</span></span><span><span lang="EN-US">40MHz</span></span><span><span>带宽，</span></span><span>利用中兴通讯的</span><span lang="EN-US">5G</span><span>基站以及搭载高通骁龙</span><span lang="EN-US">™<span>X60 5G</span></span><span>调制解调器及射频系统的智能手机大小的移动测试设备完成，<span>成功验证了利用动态频谱共享技术，</span></span><span><span lang="EN-US">NR</span></span><span><span>下行峰值速率相比于静态配置的</span></span><span><span lang="EN-US">20MHz LTE+20MHz NR</span></span><span><span>有大幅提升。同时，根据运营商部署计划，现网搭载</span></span><span>高通骁龙</span><span lang="EN-US">™<span>X<span>55</span>5G</span></span><span><span>调制解调器及射频系统的智能手机以及其它类型终端通过软件升级也将同步具备</span></span><span><span lang="EN-US">4G/5G</span></span><span><span>动态频谱共享能力。</span></span></p>
<p><span>与</span><span lang="EN-US">4G</span><span>相比，</span><span lang="EN-US">5G</span><span>在设计之初就能够支持广泛的频段，包括高频毫米波（</span><span lang="EN-US">24GHz</span><span>以上）、中频段（</span><span lang="EN-US">1-6GHz</span><span>）和低频段（</span><span lang="EN-US">1GHz</span><span>以下），并且能够支持</span><span lang="EN-US">TDD</span><span>和</span><span lang="EN-US">FDD</span><span>部署模式。如何基于目前</span><span lang="EN-US">4GLTE</span><span>使用的频段部署</span><span lang="EN-US">5G</span><span>并且确保不影响</span><span lang="EN-US">4G LTE</span><span>用户性能，成为全球运营商面临的重要问题，而动态频谱共享技术则能够有效解决这一问题。它作为</span><span lang="EN-US">3GPP Rel-15</span><span>标准版本中引入的全新蜂窝特性，能够支持</span><span lang="EN-US">5G NR</span><span>和</span><span lang="EN-US">4G LTE</span><span>在同一频段</span><span lang="EN-US">/</span><span>信道上同时运行。动态频谱共享技术还能够根据用户的实时数据需求来动态分配</span><span lang="EN-US">5G NR</span><span>和</span><span lang="EN-US">4G LTE</span><span>之间的频谱资源。</span></p>
<p><span>中国电信用于</span><span lang="EN-US">4G LTE</span><span>部署的</span><span lang="EN-US">2.1GHz FDD</span><span>频段，具有良好的频段优势和覆盖能力。利用动态频谱共享，中国电信能在目前用于</span><span lang="EN-US">4G</span><span>部署的</span><span lang="EN-US">2.1GHz</span><span>频段中引入</span><span lang="EN-US">5G</span><span>，通过经济、快捷、高效的方式加速其</span><span lang="EN-US">5G</span><span>部署，同时提升其</span><span lang="EN-US">4G</span><span>和</span><span lang="EN-US">5G</span><span>用户的移动体验和小区覆盖性能。在该功能部署后，</span><span lang="EN-US">4G</span><span>和</span><span lang="EN-US">5G</span><span>终端可以同时接入</span><span lang="EN-US">2.1GHz</span><span>，</span><span lang="EN-US">4G</span><span>终端的用户体验不受影响，</span><span lang="EN-US">5G</span><span>用户体验得到提升。</span></p>
<p><span>目前，工信部已经明确划分</span><span lang="EN-US">2.1GHz</span><span>（</span><span lang="EN-US">n1</span><span>）频段中的</span><span lang="EN-US">2*40MHz</span><span>（</span><span lang="EN-US">1920-1960MHz/2110-2150MHz</span><span>）给中国电信和中国联通用于</span><span lang="EN-US">5G</span><span>网络部署。在中国电信与中国联通</span><span lang="EN-US">5G</span><span>无线网络共建共享的背景下，</span><span lang="EN-US">2.1GHz</span><span>（</span><span lang="EN-US">n1</span><span>）频段将拥有</span><span lang="EN-US">2*40MHz FDD</span><span>带宽，能够进一步提升</span><span lang="EN-US">5G</span><span>用户的业务体验。</span></p>