WiFi range of 20 km for private use.

[badal]

Hi,

We have a range of 20km radius to be covered under WiFi Networking.
The end points will be either laptops/desktops or mobile devices with WiFi.

The incoming bandwidth from our local ISP is around 8 mbps and is to be shared among 40 devices spread in a park environment which is a botanical lab.

What device should we look into from UBNT?

Let me know if you need more info.

Thanks,
Deb

[WHT]

Are you ready to spend at very least $200,000 ???

Reality check time...

Typically a wireless ISP might figure on about a five mile radius from a hundred foot tower to a house roof top directional antenna for an end user speed of about 2 Mbps. Roughly speaking....repeat....ROUGHLY SPEAKING.

You want laptop converge with zero gain internal antenna wireless card at street level good for 8 Mbps - that cuts your range to 500 to 1,000 feet.

Figure on around one hundred access points. Are you ready to spend $200,000?

[kijoma]

$200,000 :lol:

serious ?

based on your typical link budget i suppose but not most peoples.

[WHT]

How far from a typical access point have you seen a laptop go?

[InoX]

1.3km with stable connection with an asus eee pc

[MaximumISP]

There has to be a little more to this
InoX Are you saying this was a completely stock eeepc no external antenna, radio card ect.
if so it must have been perfect clear los conitions

My experiance agrees with WHT the range at best with standard wifi gear is 1000ft on the high end and 300-500' is a more realistic average in a typical enviourment

No way your gonna have blanket coverage on a 20k radius for standard wifi gear without some major investment even if they are all eeepc's

Likely blanket coverage is not actually required and well planned pocket coverage for these 40 devices may be more than adequate
This could be done much more economically but requires further details
then have been provided

letting badal believe 20k blanket coverage is a simple matter of picking the right radio isn't realistic

[WHT]

1.3km with stable connection with an asus eee pc
That is three to six times the recommended deployment strategy. Generally speaking, figure on 1,000 to 2,000 feet range from an access point. that comes out to 20 to 25 APs per square mile.

Therefore to cover a 20 KM radius or 1300 square kilometers (about 480 square miles), you would need 10, 000 to 12,000 access points. At $500 per AP, that's 6 million dollars.

OK...so $200,000 was on the low side.

[silentservice]

Hi,

We have a range of 20km radius to be covered under WiFi Networking.
The end points will be either laptops/desktops or mobile devices with WiFi.

The incoming bandwidth from our local ISP is around 8 mbps and is to be shared among 40 devices spread in a park environment which is a botanical lab.

What device should we look into from UBNT?

Let me know if you need more info.

Thanks,
Deb


Last month I have been made great experiment with my 200mw Access Point radio + Grid 24db antena and we get result PTP 50km range. 2-4 ms ptp ping and 230-300ms ping to the internet (www.google.com). :D

[WHT]

Last month I have been made great experiment with my 200mw Access Point radio + Grid 24db antena and we get result PTP 50km range.
That's not surprising, but its an apples to oranges comparison.

He has an omni antenna connecting to street level zero gain antennas.

You have LOS 24 dB gain antennas at both ends.

But getting back to reality...look what the big time players estimate:

Chicago - 220 square miles, 7,500 access points, $18.5 Million

Google's Mountain View - 12 square miles, 400 access points.

Houston - 640 square miles, $50 Million

Corpus Christi - 147 square miles, $7.1 Million

Now...about that 480 square miles that Badal wants to cover - - -

[InoX]

1.3km with stable connection with an asus eee pc
It was one time only test, perfect LoS and a 17dBi sector to the base. We had another Trendnet AP that worked at the same distance with 2x5dBi omni antennas(diversity)...thats quite strange.

[Pinion]

Hi,

We have a range of 20km radius to be covered under WiFi Networking.
The end points will be either laptops/desktops or mobile devices with WiFi.

The incoming bandwidth from our local ISP is around 8 mbps and is to be shared among 40 devices spread in a park environment which is a botanical lab.

What device should we look into from UBNT?

Let me know if you need more info.

Thanks,
Deb

The guys are right, it will take some AP's to make this a reality. However, I have had good experiences with UBNT stuff out to about 3 miles on a plain laptop. I'm in low noise heaven.....

now, back to reality..... does the entire area need coverage? If most of the system will be used in a few areas of the park, you can get by with less gear.

UBNT has some gear that will get you coverage in key areas at a low cost. However blanketing the whole 20km radius will be expensive to say the least. 1256 sq/km is a large area for laptop coverage.

If it was me, I'd figure out what key areas need coverage, then go from there. Say one area was studying trees, if you had an AP near that area that users could access, that would reduce costs dramatically as opposed to blanket coverage.

A little better idea of the lay of the land would help figure this out.

Howard

[BruntTower]

How much your wifi antenna ranging 20km? Because I am planning to build a wifi internet connection instead of building an internet cafe for lesser maintainance.


Thanks


Brunt Tower

[raytaylor]

It was one time only test, perfect LoS and a 17dBi sector to the base. We had another Trendnet AP that worked at the same distance with 2x5dBi omni antennas(diversity)...thats quite strange.

Fartherst i got was 650m with an 18dbi grid and bullet 2 at the base to an eee 701 in b mode before the pings started dropping.

For reliability, I wouldnt plan on anything more than 500m from an AP to a laptop, line of sight.