随着5G的到来，我们可以享受到VR/AR、车联网、物联网等大流量应用带来的便利。 5G将首先造就终端厂商。由于业务请求的涌入，终端设备——5G手机应该会阻塞网络，但目前的CDN不足以满足5G时代的应用需求。如何将 5G 网络添加到 CDN 网络？ 2019年加快网站CDN发展非常重要！
如何解决5G速度网络瘫痪
众所周知，5G网络的特点是高带宽、低时延。此外，5G在连接数上也是4G的一百倍。 5G的普及，将很多体验从实验室带入了现实生活。具体从4G对比可以看出：
1、在速度方面，5G的实际速度可以达到300-400MB/s，比目前的4G速度快100倍，这也让眨眼间下载一部电影成为现实。
2、延迟方面，4G网络无法满足自动驾驶系统的普及。 50ms的长延时无法及时传输到云端进行分析处理，再传输回车辆，无法将交通风险降低到安全值。 5G 1ms以内的延迟为自动驾驶提供了可能。
3、最后，在连接数上，5G可以实现每平方公里100万个终端连接，是4G每平方公里10000个连接的100倍。
随着5G技术带来的物联网发展，未来几年CDN的加速将势不可挡。虽然到2020年5G商用年，全球物联网终端连接数将超过300亿，也就是每人平均拥有4台联网设备。但是，5G仍然无法满足带宽、传输速率和时延上几十倍甚至上百倍的提升，终端瘫痪的风险急剧增加。 CDN技术的主要作用是缓解网络拥塞问题。随着 5G 的到来，CDN 可以很好地在网络上构建内容分发网络，依托边缘服务器通过“网络服务器负载均衡”中心平台，进行内容分发、调度等模块，使用户能够就近获取想要的内容，提高整体分发效率，减少网络延迟，节省带宽资源。
从最初的
4G时代CDN可解决5G网络拥塞
4G时代，CDN基本部署在CR（核心路由器）和SR（服务路由器）附近，部署位置更高。同时，节点部署稀疏，每个节点平均覆盖半径10公里。与4G网络不同，5G网络是扁平的，每个基站只有一个盒子那么大，20KG，不管放在哪里都可以。未来，周围会有很多基站。 CDN节点的发展在4G已经饱和。 5G时代，每个CDN节点的覆盖将无法满足终端设备的爆炸式增长，尤其是VR/AR、自动驾驶等对时延有严格要求的应用的接入。原CDN处理能力不足，无法响应请求，势必造成网络拥塞。一旦延迟增加，例如在自动驾驶场景中，路况信息无法及时返回，发生交通事故的概率也会增加。
因此，互联网数据认为，在5G时代，CDN必须提前部署下沉，这可能是最好的解决方案。一方面，在架构上，CDN应该从CR和SR侧迁移到用户侧。同时在节点在部署方面，正朝着小型化、高密度方向发展。原本每个节点的半径为 10 公里，现在需要缩小到 1 公里甚至更小。
另一方面，在技术上，CDN应该部署在云平台上，根据业务需求实现弹性伸缩，提高CDN的服务调度和内容调度能力，将用户请求准确调度到服务能力最好的节点。
总的来说，随着5G时代的到来，新一代CDN的特点大致可以分为以下四点：
1、基于5G的CDN边缘节点部署更加灵活，5G MEC部署在移动网络边缘
2、NFV实现网络资源共享，灵活扩展，CDN NFV实现软硬件解耦
3、SDN使调度和路由控制更加灵活，打通网络感知和集中控制和能力，提供灵活调度和优化路由能力。
4、ICT对用户的分发能力越来越接近用户，CDN将进一步浸入用户家中，即P2P-CDN。
对于5G时代CDN的下沉，需要加强CDN的优化，在架构和技术上适应下沉后的网络结构；基于云平台部署，可根据业务需求灵活扩展，提升CDN服务调度和内容调度效率。精准调度到具备服务能力的节点，将热点内容及时推送到用户需要的区域。 5G时代，底层网络已经开始布局，包括基站和终端，相当于高速公路。 CDN即ETC，加快5G网络的传输速度。这就是CDN的价值，CDN相当于整个互联网业务内容的快车道。
5G+CDN的发展方向在这里解释一下。虽然不是很清楚，但大方向还是可以理解的。毕竟5G网络是在不断测试、不断完善中发展起来的，5G+CDN毕竟会让我们受益。大家，CDN需要咨询德迅云安全
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