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The author:(作者)delvpublished in(发表于) 2014/1/8 7:47:59 Move the 4G speeds measured： Spike 20M fibre，
Move the 4G speeds measured: Spike 20M fibre -4G,3G, China Mobile, China Unicom,-IT information Move the 4G speed is measured: Spike 20M fibre
4G on how fast? As the move says, that, beyond the 3G several or even dozens of times or more, please? Now Xperia Z1 mobile Xperia Z1 compete using the link 3G network, network systems for TD-LTE of the former, the latter type of network for HSPA+, test sites in the 4G signal is more stable near Shanghai zhabei district town of Suzhou River.
Comparisons are cruel, 4G of network can always be stable at around 50Mbps downlink, uplink speeds up to 8Mbps, 3G five times as much. Although can reach downlink theoretical peak rates of 42Mbps HSPA +, but with the increasing number of users 3G, actually almost impossible to achieve such a high rate, downlink speeds up to 10Mbps link 3G in the testing is already very satisfactory state, mostly 2 to speed of 4Mbps.
Although Xperia Z1 mobile version of speed 4G theoretical peak downlink upward speed of 50Mbps 100Mbps, there are still many distances, but downside 50Mbps uplink 8Mbps is a concept of what? Which means mobile phones download speeds can reach more than 6MB/s per second, and upload speeds up to 1MB/s, this value is sufficient to spike 20M speed of Shanghai's mainstream, mobile networks beyond the era of cable broadband will eventually come, but we can really enjoy the flying speed?
4G signal testing: 500 times times, TD-SCDMA is the mainstream
According to China Mobile in Shanghai 4G signal coverage map shows online, the 4G network coverage is concentrated in the city urban area within the inner ring, Puxi and Pudong, the coverage gap is quite startling. And field experience, found even in 4G network signal coverage is unsatisfactory.
If you're on the outside, 4G network is still relatively stable, around people's square can receive 4G signal at any time, but changes in signal intensity fluctuated considerably, and always between ranges from two to three, down speed can remain at 14Mbps, uplink speed can be up to 7.55Mbps. Near the Pacific Department store in Huaihai Road shopping area, we determined that the maximum speed for a few days, next 61.56Mbps, uplink is up to 9.19Mbps.
4G and 3G the actual contrast: Twitter screenshot differences had little comic page instantly
To sum up, as long as the 4G signal coverage area, things beyond the 3G is no doubt that the speed, but in real life, we do not always felt so obvious differences. In order to simulate day-to-day Web browsing, we have selected three scenarios for mobile 4G in contrast to the link 3G measurement project, namely Web browsing, Twitter pictures loaded with comic browsing, please watch the video below: (left for Xperia Z1 mobile version, right to use HSPA + network Xperia Z1)
Like brushed micro-blog, friends, social events, mobile experience the difference between the 4G with the link 3G can be said to be minimal, almost at the same time complete the picture to load, while mobile 4G exposed the instability problems, appeared twice pictures not loading correctly, the actual use of 4G signal does not often occur in download speed. Social talent, 4G to some advantage in upload speeds more like sending tweets with 6 photos, Xperia Z1 mobile version is almost instantaneous.
Real body gaps which is browse two Web browsing and comics, mobile 4G has the real deal download speed, regardless of the page was loaded comic ancestors back, compared to the link 3G before the comic pictures flowing, a moment when watching a few, but obviously couldn't keep up the speed of the late. Of speed plus the Xperia mobile 4G Z1 valiant Dragon 800 processor is the online tool 4G to quickly complete HD video buffer, select node without having to wait for, it is 3G do it anyway, related to speed this hard. So the user can according to their own needs to choose whether to upgrade, no need to blindly follow tide 4G and mobile 4G download speed so fast, cheap 50 Yuan with a China Mobile 600M packages to be enough?
4G consumption: 50 600M,2G, 3G GM
In fact some Internet rumors such as "6 seconds used 600M" such rhetoric was somewhat exaggerated, although download speeds become faster, but downloaded object does not change, as long as you don't use 4G as a one size fits all, watch online videos without moderation, 4G the flow of not more than 3G.
You also are not always exposed on 4G under the network signal coverage, when the cell phone signal when switching between 3G or 2G, you can still use 4G traffic within the package, three network band traffic was common, while Shanghai currently has 50 Yuan, 600M Yuan, 1G Yuan, 2G Yuan 3G 5G traffic package selected and 180 yuan.
But with 4G average downlink speeds of 50Mbps (6.25MB/s) count, 600M flow packet will be depleted in 96 seconds, a careless flow quickly between the fingers is gone. So, to lose in everyday use, mobile phones no larger than a home broadband can unlimited download, if base which video link was wrong, flew not flow but Grandpa.
Mobile 4G network is still a flaw, it's voice down, because the data was not on the same network with calls if the phone calls all of a sudden, cut off the 4G network in order to guarantee the call until the call ends automatically switches back to 4G are required after a certain amount of time. But Xperia Z1 mobile version you do not need to worry about this problem, it supports both 4G and 2G communication, that is, single-card double question, during a call transfer can also be 4G in the network, which is a strength of Xperia Z1 mobile version.
Summary: the 4G, the biggest opponents are moving their
When China Unicom and Telecom was in 4G the early stages when the mud, relatively fast moving is the only option on the 4G market, this move is both an opportunity and a challenge. On currently Shanghai of 4G network,, speed does very fast, enough to grind pressure 3G and 20M fibre, but move needs do of also has many, first is coverage, user not hopes buy has 4G phone and package, results found most time with of actually also is 3G; another a is price, while 4G to units flow to calculation does than 3G to cheap, but also don't forgot has calls, and purchased 4G phone by produces of cost, face huge of 3G fleet, mobile 4G custom machine of select still too less.
移动4G网速实测：秒杀20M光纤 - 4G,3G,中国移动,中国联通 - IT资讯移动4G网速实测：秒杀20M光纤
4G速度究竟有多快？真的如中移动所说，能够超越3G数倍甚至几十倍以上吗？现在就让Xperia Z1 4G移动版与使用联通3G网络的Xperia Z1一较高下，前者的网络制式为TD-LTE，后者的网络类型为HSPA+，测试地点在4G信号较为稳定的上海闸北区大悦城-苏州河畔附近。
对比结果是残酷的，4G网络的下行速度始终可以稳定在50Mbps左右，上行速度则达到8Mbps以上，皆是3G的五倍之多。尽管HSPA+的理论峰值速率能够达到下行42Mbps，但随着3G的用户不断增多，实际几乎不可能达到如此高的速度，在测试中联通3G的下行速度达到10Mbps已经是非常令人满意的状态，大多情况下只有2至4Mbps的速度。
虽然Xperia Z1 4G移动版的网速离4G理论峰值下行100Mbps、上行50Mbps的速度仍有不少距离，但下行50Mbps、上行8Mbps是个什么概念？也就是说手机每秒下载速度可以达到6MB/s以上，上传速度达到1MB/s，这个数值足以秒杀目前上海主流的20M光纤速度，手机网络超越有线宽带的时代终究还是来临了，但我们真的能够时刻享受这种飞一般的速度吗？
4G信号测试：好坏相差500倍，TD-SCDMA才是主流
根据中国移动在网上公布的上海4G信号覆盖图显示，城内的4G网络覆盖主要集中在内环以内的市区，浦西与浦东的信号覆盖差距还是比较悬殊的。而经过实地体验，发现即便在市中心4G网络的信号覆盖程度也无法令人满意。
如果你身处室外，4G网络还算比较稳定，人民广场周边可以随时接受到4G信号，但信号强度的变化起伏较大，始终介于两格至三格之间，下行速度可以维持在14Mbps至20Mbps，上行速度则可以达到7.55Mbps。而在淮海路商圈的太平洋百货附近我们测得了这几天的最高速度，下行为61.56Mbps，上行更是达到9.19Mbps。
4G与3G实际对比：微博载图差异甚微，漫画翻页瞬间完成
综上所述，只要在4G信号覆盖的区域内，速度上超越3G是毫无悬念的事，但实际生活中我们并不一定会感到如此明显的差异。为了模拟日常中的网络浏览情况，我们选择了三种场景作为移动4G与联通3G的对比实测项目，分别为网页浏览、微博图片加载与漫画浏览，下面请看视频：（左为Xperia Z1 4G移动版，右为使用HSPA+网络的Xperia Z1）
如刷微博、朋友圈等社交活动，移动4G与联通3G之间的体验差异可说是微乎其微，两者几乎同时完成图片加载，而移动4G则暴露出不稳定的问题，两次出现图片无法正常加载，实际使用中也经常发生有4G信号却无下载速度的情况。对于社交达人而言，4G更多地会在上传速度上有些优势，如发送带有6张照片的微博，Xperia Z1 4G移动版几乎瞬间完成。
而真正体现差距的则为网页浏览和漫画浏览两项，移动4G拥有实打实的下载速度，无论网页还是漫画加载都先人一步，相比之下联通3G在漫画前几张图片时还能保持流畅的观看，但后期的速度就明显跟不上了。移动4G的网速加上Xperia Z1的骁龙800处理器乃是在线看片利器，4G能够快速完成高清视频的缓冲，选择时间节点后也无需等待，这是3G无论如何也做不到的，关乎网速这一硬指标。所以用户完全可以根据自身的需求选择是否升级，没必要盲目跟从4G的大潮，而且移动4G的下载速度那么快，以目前中国移动最便宜的50元600M套餐来算足够吗？
4G流量消耗：50元600M，2G、3G全通用
其实目前一些网络传言如“6秒用完600M”之类的说辞有些夸大了，虽然下载速度变快，但下载的对象并没有改变，只要不拿4G当万金油，无节制地观看在线视频，4G所产生的流量不见得会比3G多。
况且你也并非始终暴露在4G信号覆盖的网络下，当手机的信号切换为3G或2G时，依旧可以使用套餐内的4G流量，三个网络频段的流量是通用的，而上海目前有50元600M、70元1G、100元2G、130元3G与180元5G流量套餐可选。
不过以4G的平均下行速度50Mbps（6.25MB/s）来算，600M流量包将会在96秒内枯竭，一个不小心流量立马就在弹指间飞走了。所以日常使用上要量力而行，手机不比家里宽带可以不限量地下载，万一手贱点错了哪个视频链接，飞出去的就不是流量而是毛爷爷了。
另外移动4G网络仍存在一个缺陷，那就是语音回落，由于数据与通话并不在同一个网络上，如果手机突然来电，为了保证通话就必须切断4G网络，待通话结束后也需要一定时间来自动切换回4G。但Xperia Z1 4G移动版则无需担心这个问题，它同时支持4G与2G通信，也就是单卡双待，在通话过程中也可以进行4G网络传输，这是Xperia Z1 4G移动版的一个优势。
总结：4G，最大的对手是中移动自己
当联通与电信还在4G初级阶段摸爬滚打时，起步较快的中移动是国内4G市场上唯一的选择，这对中移动来说既是机遇，也是挑战。就目前上海的4G网络而言，网速确实非常快，足以碾压3G与20M光纤，但中移动需要做的还有很多，首先是覆盖率，用户不希望买了4G手机与套餐，结果发现大部分时间用的居然还是3G；另一就是性价比，虽然4G以单位流量来计算确实比3G要便宜，但也别忘了通话、购买4G手机所产生的成本，面对庞大的3G机群，移动4G定制机的选择依然太少。
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