Wi-Fi networks have become so popular, so you can face with them everywhere and in large numbers. IF you set up wireless home router in your apartments, you will notice that signal quality leaves much to be desired. We are talking about quality of signal in 2.4 GHz frequency range. That is not the same as signal level. In your apartments it will be full of course.
Bad quality of signal can be caused by different devices, which operates on 2.4 GHz frequency too. For example, it can be microwave ovens, radio-controlled devices and other wireless network points of your neighbors. This frequency range is very narrow and has only 12 channels, so buying of expensive router can’t solve this problem.
Huge number of networks, which you see in networks list, means that your network signal quality will be unstable. Going to the store and checking boxes with wireless home router you can see speed with which they can send data packets. This speed is maximal speed, so in practice in will be slower. Here is requirements for high quality of speed, that must be done:
- Destination device must be 802.11 n
- Channel width must be 20 GHz or 40 GHz, but not every device can operate with this channel width.
- Device’s chipset must support this signal speed, but mostly it will be 120-150 Mbps.
- Small number of wireless network points in your router’s coverage area.
Why we need all of this? For example, you have 70 Mbps connection speed tariff plan, but your real surfing speed is 54 Mbps. You lose about 10-15% from encryption and interference, so as a result you lose about 50% of overall speed. The conclusion is that buying 802.11 b and g routers is bad idea, when high signal speed requires n standard. Moreover, incorrect configuration of your router can be reason of signal speed losses.
In some countries N standard is not certified, so 802.11 n protocol in Wi-Fi cards is blocked. There are different ways how to unlock it, but it is risky. Laptops from countries, where n standard is certified, have 802.11 n protocol.
If you buy router with 5 GHz frequency range and try to find network, that broadcasts in this range, you won’t find it in the most cases.
What about 5 GHz in AC and N standards?
802.11 AC is a new standard, but devices with this protocol have very scary prices. There are nowhere to use signal speeds specified in devices with AC standards. Maybe, it can be used to broadcast presentation with high resolution images. Our choice is routers, which support 2.4 – 5 GHz two band and work with n standard. Not all models can work in two bands at the same time, so devices without n standard can’t find it. For example, old smartphone without n standard can’t find this network, but new laptop with n standard can. Don’t worry! There are some models, that can share signal in two bands simultaneously.