近日，有媒体报道了美国独立第三方移动分析公司的测试结果，澳大利亚的5G网络，最大下载速率为792Mbps，而其4G网络最大下载速率为950Mbps，其峰值下载速率竟然比4G低了20%。网友纷纷表示：大利亚你那是假5G吧！
这样的测试结果确实让人大跌眼球，因为5G网络作为第五代移动通信网络，其峰值理论传输速度可达每秒数十Gb，这比4G网络的传输速度快数百倍，整部超高画质电影可在1秒之内下载完成。怎么可能最大下载速率才为792Mbps。
有业内专家表示：5G网速快慢取决于多方面的因素，很多5G网络基础设施还未铺设完备，这就导致不同区域的5G传输速度差别很大，在开始阶段没有公众想象得那么快。
而在今年5月，中国移动在OPPO北京超级旗舰店搭建了一个5G宏站，为场馆内的5G体验提供支持，有媒体记者就曾亲自前往体验。
从现场展示的手机显示：5G测速达到了2200+Mbps下载速率，远远超过目前手机端一般峰值在1-2Mbps的下载速率。
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“当然，现实情况下并不会达到这么高。”现场的5G技术人员解释道：“手机展示的只是理论值，真正实际网络应用中，会因受到各种外部因素影响，而压缩现实速率，达不到理想值。”
其实，很多峰值数据都是在一个相对封闭或固定的环境测试得出来的结论；就像我们现在使用的4G，其理论数值也是达不到得，当我们在不同地方，所体验到的效果差异也很大。
让我们将时间调回到3G到4G的应用阶段，看一看我们的网速从实验室数据到真实数据的变化过程。
上图显示了4G网络的速度，我们可以看到4G的速度是3G速度的20到30倍，而我们平时手机下载内容的时候最好的状态下速度也只能达到1M-2M，更多的情况则是在800KB左右。比3G 是快一点，但别说二三十倍，这是没有的。
但是随着手机换代速度变快，功能越来越多，我们再从4G切回2G/3G的时候，就会明显的感觉到太慢了，尤其是2G网络，而3G的话还是勉强能用，但是畅快的感觉没有了，这是为什么呢？
这里面有设备的问题，也有运营商网络的问题，当然还有具体使用环境问题。
对于设备而言，我们知道的LTE Cat6载波聚合，其理论峰值300M。现在骁龙855的基带已经支持Cat20，其理论速率达2Gbps，只要运营商这边愿意布局相应基站，4G其实还有很大发展空间；这也是我们很多人会觉得使用了新版基带后，在同一环境下网络要比旧手机强的一方面。
其次，我们从3G的聊天应用为主的时代进入到，4G的视频应用爆发期，我们的上网数据量正在变得越来越大，这个大可能是3G数据量的数十倍到数百倍。
说个最直观的，大家都知道中国移动在2G时代的5元30M流量包吧，刷刷小新闻、聊聊像素版QQ还是够用的，但是到了视频应用时代后，网友直呼移动坑，网上看个视频你这30M就没了。
所以这点流量放到现在来说，已经完全不够用了，因为我们的数据量不在是几十Kb起了，而是按Mb起步计算了，数据量变大，但如果再回到2G\3G，在2G\3G的网速下，加载的时间也会成倍增长，就会让人觉得2G\3G被降速了。
再次，就是心理方面，当我们习惯了更快的环境后，再回到原来的网速条件，心理会形成一种落差。最简单的就是，如果一直在市区开车（30-40公里每小时），习惯了之后也就觉得这是正常速度；一旦换到高速之后再回市区去开，不上六十都觉得像龟速。
最后，就是大家的揣测为了推广4G，运营商偷偷的为2G/3G降速，以此来倒逼用户升级，从而提高4G用户的使用量。但这样一来就会给4G网络加重负担，尤其是无限流量开通后，大家的网络体验感直线下降。
写在最后
目前，5G商用才刚起步，很多的基础服务和通信基础设施还在建设中，5G的峰值速率是否能够再生活中实现，这里还不能急于下定论，但我们参考3G到4G发展的演变后，我们不难发现实际传输速度和峰值理论传输速度中间还是有较大差距的。
实际应用情况要比5G在标准规格的专业实验室中测得的峰值传输速度要复杂得多，信号干扰、5G实际环境、设备信号功率及终端硬件自身等都会对5G的传输速度造成影响。当然，随着技术的不断进步，5G在大规模天线阵列、超密集组网和新型网络架构等方面不断迭代，5G速度将会变得越来越快的。
