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 1G 和 2G 拨号发送短信,到 3G 和 4G 网页浏览和在线视频观看,通信频段的提高改变了社会格局。 5G带来高传输率、低时延的优势,VR/AR、自动驾驶、物联网将变得平凡。尤其是2016年以来,随着快手、抖音等小视频直播行业的兴起,以及云计算、物联网、人工智能等技术的推动,CDN市场进一步得到催化。从2012年到2016年,CDN承载的流量在全球互联网流量中的比例从2000年到2000年不断上升,预计到2021年,CDN承载的流量将达到70%以上。
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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