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4G架构对移动网络的性能影响

2014-02-07 00:29 387 查看
原文和视频链接: http://geekcantalk.com/post/75793438943/mobile-performance-from-the-radio-up-4g-architecture

Mobile networks are slow, unreliable, and have high variability both in latency and bandwidth – a nightmare to optimize for! Right? Well, almost. While the performance can be much slower, and more unpredictable, it’s not nearly as bad as it seems once you understand
the architecture and the limitations of both the device, and the radio network. And that’s what we’re going to do: build a 4G network, from the ground up, piece by piece, and talk about the performance implications of each and every component.

移动网络慢,不可靠,而且带宽和延迟两个方面都抖动严重——简直是一个噩梦般的优化对象?好吧,差不多是这样的。虽然性能可以更慢,和更加不可预测,但是它并不是像看上去那样的糟糕的,当然你要先理解设备和无线电网络的架构和限制先。这就是我们要做的:架设一个4G的网络,从头开始,一点点的来,把某一个组件都拿出来细细的说说。

If “4G from the ground up” seems like an ambitious undertaking in 40 minutes – it probably is. But it’s not rocket science either, and we’re a smart bunch! Things we’ll cover:
Physical architecture of major 4G components (packet and serving gateways, etc)
Data flow from and to the mobile device within the 4G network
Latency and bandwidth promises vs. real-life performance
Radio and resource scheduling in 4G networks
Performance optimization techniques, tips, and tricks
For the finale, with 4G under our belts, we’ll take a quick look at 3G as well – turns out, it’s basically the same, except slightly more contorted.

如果“从头开讲4G”这个话题对于一个40分钟的技术演讲太过于雄心壮志了,那也没关系。它也不是什么火箭技术,是不?我们可是聪明的家伙!本演讲将覆盖的内容包括:

主流4G组件的物理架构(包和服务网关等)
从移动设备到4G网络的数据流向
理论上的延迟和带宽 对比 实际情况下的性能
性能优化技巧,小贴士和技术
最后,在谈完了4G之后,我们再简单看看3G。当然它们其实差不多,只是3G更扭曲一些

Once you know how the mobile networks operate under the hood, and why you’re seeing the latency and throughput variability that you do, chances are, you’ll be able to optimize your site and applications accessing it for better performance.

一旦你知道了底层移动网络是如何运行的,以及为什么延迟和吞吐量会不断变化,那么你很有可能就已经能够把你的应用和网站针对移动网络做更好的优化。

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