如何Android的仅扫描模式的工作? [英] How does Android's scan-only mode work?

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本文介绍了如何Android的仅扫描模式的工作?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

是Android 4.3增加了新的软件功能,不断获得无线扫描结果即使WiFi是关闭。它说,这种模式下消耗的功率非常低。

Android 4.3 added new 'software' feature that keeps Wifi get scan results even if Wifi is off. It says that this mode consumes very low power.

我的问题是如何在技术上做的,多大的权力保存的比例仅为启用WiFi?

My question is how this technically done, and how much power saved compared to just enabling Wifi?

推荐答案

的逻辑很简单:司机及wpa_supplicant永远不会从内存中通过的扫描总是可用的卸载,除非仅扫描模式在WiFi高级菜单禁用的选项。

The logic is simple: driver and wpa_supplicant is never unloaded from the memory, unless scan-only mode is disabled in WiFi advanced menu via Scanning always available option.

在功耗方面 - 数量将每一个WiFi解决方案有所不同,但根据我的经验(即对于Android的OEM对过去4年中之一的无线网络工程师),差异较小。下面是一些平均消费数的例子:

In terms of power consumption - the numbers will differ for every WiFi solution, but according to my experience (being an WiFi engineer for one of the Android OEM's for last 4 years), the difference is minor. Below is an example of some average consumption numbers:


  • 电话是清醒的,无线网络禁用:〜220毫安(取决于很多因素,只是一个例子)

  • 手机睡觉,无线网络禁用:〜5毫安

  • 手机睡觉,支持WiFi(当然,适用于仅扫描模式以及):+5毫安

所以,如果你是一个活跃的用户,把扫描仅关闭不会给你巨大的节能。在另一方面,如果手机的用法是有些被动,关闭此选项可以给一些额外的电池寿命。

So, if you are an active user, turning Scan-Only off will not give you huge power savings. On the other hand, if the phone usage is somewhat passive, turning this option off could give some extra battery life.

就个人而言,我一直在这个选项,因为我preFER即时无线网络的可用性,当我能过来了轻微的电池胜利。

Personally, I keep this option on, since I prefer immediate WiFi availability when I enable it over that minor battery win.

这篇关于如何Android的仅扫描模式的工作?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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