How can you achieve Wi-Fi at a distance of 20 km?

Antilogic2011-07-03 14:53:24

WiFi

Antilogic, 2011-07-03 14:53:24

There is a task - to organize the Internet in the country. 3G does not catch at all, EDGE is not stable and slow.
The distance from the house to the cottage is 20 km. Between them is mostly forest.
In stock:
Access point Asus WL-500Gpv2
Two 2W Wi-Fi signal amplifiers.
What else is needed in order for the speed to be at least 2-5 megabits?
Who has already tried to organize Wi-Fi transmission over long distances?

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16 answer(s)

Eldar Musin, 2011-07-03
@eldarmusin

What if we bury 20km 1000BASE-LH underground at night? You can run 5 km =)

Sergey, 2011-07-03
@bondbig

In the presence of direct visibility (trees are not such) and a pair of directional antennas more powerful, you can achieve a connection via WI-FI. But you won’t be able to work comfortably: wind, rain, fog, birds, some other unknown crap, there will always be cliffs. Exceptional IMHO, I did not stretch the vaywai further than a kilometer.

IllariPosselt, 2011-07-03
@IllariPosselt

It is unlikely to help, but here is a small presentation of how wi-fi was transmitted for 300 kilometers

sn4ke, 2011-07-03
@sn4ke

For such distances, "home equipment" is not suitable.
If there really is such a need, look towards industrial wifi equipment, for example UBIQUITI
Link to Yandex brand with UBIQUITI equipment .
PLUS a couple of good long antenna poles to try and get a line of sight.

andrey_kl, 2011-07-03
@andrey_kl

I don’t know how it is in Russia, but in Ukraine you will have to pay a lot of money to Frequency Supervision for external WIFI points ... I would put a plate with a return on EDGE.

stranniknavsegda, 2011-07-04
@stranniknavsegda

Wi-Fi in this case is a little inappropriate, it is better to use something in the spirit of broadband access! Personally, this miracle http://www.nporapira.ru/ works great for me, while the distance between point-to-point is 14800 meters, but this is far from the limit. The signal is stable and disappeared only once, and even then because the light was turned off.

Dyzzet, 2011-07-03
@Dyzzet

> 3G doesn't pick up at all
I don't know about Wi-Fi, but this article shows you how to pick up a weak 3G signal with (don't fall over) wire, pots and coffee cans.

Snapp, 2011-07-03
@Snapp

Why don't you look towards satellite internet? It'll come out cheaper.

Alexander, 2011-07-12
@ncix

I think you will need to calculate the profile of the route
www.linktest.ru/

SOb_S, 2011-07-03
@SOb_S

And if WiMAX and VPN?

Maxim, 2011-07-03
@Bublik

They made a link for 16 km. The speed was 1-2Mbps.
On both sides were DWL-2100 with Bluebox firmware and ANT24-1801 antennas.

s0rr0w, 2011-07-03
@s0rr0w

It is better to put laser equipment. More reliable and much faster. As far as cheaper, I can't say.

SFx, 2011-07-03
@SFx

If you understand how radio communication systems work, then you must have heard of the word equalizer?
so - in most communication devices, this equalizer (which, by the way, fights against multipath of the communication channel and fading) has a small (relatively) length to save crystal resources, thus it will not be able to process multipath that is caused at such large distances, even if the level power will allow the synchronizer in the receiver to work confidently ...
thus, not every $40 access point will do. You need to buy proven equipment that is used in industrial communication systems, or at least in which it is stated that such a distance is acceptable for operation. Next, you need to calculate the communication channel. google will help you with this, select the necessary signal amplifiers, calculate the cable length, select an antenna (in your case it will most likely not even be a panel one, but a mirror and a vibrator in focus (27db). (they say people get good results on suprals by putting a vibrator in focus, but at 5 gigs.) Naturally, direct visibility.
go for it.)

Puma Thailand, 2011-07-04
@opium

Home Wi-Fi cannot be thrown over such a distance, the distance is too long for synchronization, and there is no direct line of sight, look for a Wi-Fi point near the dacha and rush from there.

BombilCalabasov, 2011-07-04
@BombilCalabasov

IMHO it will be much easier to establish a cellular connection. A good external Yagi of 11-15 elements with good grounding will give a very noticeable increase in the GSM signal, and there the data transfer will work properly. At one time, when GSM was just starting, at the end of the 90s, in the outback of Tambovskaya, they “equipped” cellular communications with my grandmother in the village in such a way. According to NetworkMonitor, the communication range was ~ 35 kilometers - the limit for a frequency of 900 MHz. A fully charged battery in the phone sat down in about 4 minutes.
It is not difficult to find a directional GSM antenna - there are a lot of them in all sorts of flea markets selling cables and other shnyaga. It turned out to be much more difficult to find an adapter to connect an external antenna to a mobile phone. Not every mobile phone allows you to do this without opening the case.

compmaster, 2016-04-22
@compmaster

It's difficult, but it can be done. They even do it for 50 km. The question is the price. The guys from this site do this