DaveyLC
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Registered: 8th Oct 08
Location: Berkshire
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My workshop is just under 4km from my house and I can get clear line of sight with a long enough mast.. I've been looking at these high gain directional areial and 1watt amplifiers which technically should give a 10 times power increase.
Has anyone experimented with long distance WIFI? My only real fear is that the distance will create lag causing massive packet loss.
And yes im fully aware of the legalities 
Update 29/06/09
Gear ordered so far:
Engenius EOC-2610 600mW High power access point.
18dbi Omni Directional Antenna (6foot) (for station A).
20dbi Yagi Antenna (for station B).
500mW USB WIFI Adaptor for testing purposes.
N to SMA pig tail.
I still need to work out what size mast I am going to use at each location; Station A is higher than Station B so I'm planing on using a 15-20foot mast on the side of the building which will give a total of about 30-35 foot.
Station B has a 25foot telegraph pole obsucred in a tree which I hope to go up from a futher 20foot+ giving 45foot+ on which I will mount a Yagi antenna pointing to station A.
Things to consider:
I have been looking into 1 watt amps but I'm concerned about band flooding and the obvious legal implications, how ever the omni antenna I am using has hardly any "down sight" which means there is a massive dead spot under neath it which is actually an advantage in this instance due to the fact it wont blind my neighbours wifi routers 
Obviously if this works I will be investing in a second EOC-2610 for station B 
[Edited on 29-06-2009 by DaveyLC]
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ssj_kakarot
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Registered: 29th Apr 03
Location: hartlepool
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why bother just get a mobile internet dongle on payt or use your contract phone as a modem, surely it would cost more for the equipment to extend the signal than it would just just buy a usb dongle (can get them free now any way).
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DaveyLC
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Registered: 8th Oct 08
Location: Berkshire
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I want a high upstream for video (security camera monitoring).. The upstream on the 3G dongles is useless.
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John
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Registered: 30th Jun 03
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You can do it with a pringles can.
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DaveyLC
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Registered: 8th Oct 08
Location: Berkshire
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I doubt I could get a reliable connection over 4km using a pringles can lol 
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John
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Registered: 30th Jun 03
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Have a read about cantennas.
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DaveyLC
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Registered: 8th Oct 08
Location: Berkshire
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Yes, but I want bandwidth and reliability
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willay
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Organiser: South East, National Events
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Registered: 10th Nov 02
Location: Roydon, Essex
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willay
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also depends on budget or gear but its been recommended you get off th e2.4ghz range and use the 5 Ghz range for proper bridges/links, means less interference among other things. I'd also recommend devices that can deliver high power over wireless, I use a high power usb adapter with ubuntu+special drivers for packet injection/wireless surveys 
[Edited on 23-06-2009 by willay]
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DaveyLC
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Registered: 8th Oct 08
Location: Berkshire
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Can you adhoc over 5ghz or you have to buy a router/bridge?
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willay
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quote:
Originally posted by DaveyLC
I doubt I could get a reliable connection over 4km using a pringles can lol
you'd be suprised how good they can be, but dont be a shonky cheap cunt.
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willay
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You can have a PC at each end if you like without buying a appliance.
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DaveyLC
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Registered: 8th Oct 08
Location: Berkshire
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What do you think my chances are of getting decent bandwidth over 4km ?
Most of it is over fields etc. and I am on higher ground than the workshop
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willay
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Registered: 10th Nov 02
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If you have line of sight mate its worth a crack, you need the omidirectional antenna like in my picture above, and put a scope on it to point to your house.
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Nismo
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Registered: 12th Sep 02
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We use lots of Wireless bridges at work for Surveillance.
Its a case of pay for what you get.
Some good cheap short distance bridges are Tranzeo like:
http://www.wifigear.co.uk/category.aspx?category=92727C01-F39D-4D7B-AB11-35FD62097EF1
some not so cheap but very good (upto 40km) kits.
http://www.wavesight.com/
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DaveyLC
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Registered: 8th Oct 08
Location: Berkshire
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This setup claims 10km:
http://cgi.ebay.co.uk/10km-Wireless-Access-Point-or-WiFi-Repeater-inc-Antenna_W0QQitemZ350207380006QQcmdZViewItemQQptZUK_Computing_Networking_SM?hash=item5189fc8a26&_trksid=p3286.c0.m14&_trkparms=65%3A12%7C66%3A2%7C39%3A1%7C72%3A1690%7C240%3A1318%7C301%3A1%7C293%3A1%7C294%3A50
Dubious though
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pow
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Registered: 11th Sep 06
Location: Hazlemere, Buckinghamshire
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As will said, get out of the 2.4GHz and into the Wireless N 5GHz band - you may have some luck.
Failing that, some investigation into WiMAX might prove to find something interesting!
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pow
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Registered: 11th Sep 06
Location: Hazlemere, Buckinghamshire
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I'd also be scared of people being able to packet sniff over that distance
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DaveyLC
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Registered: 8th Oct 08
Location: Berkshire
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quote:
Originally posted by pow
I'd also be scared of people being able to packet sniff over that distance
I'd make sure it was behind a firewall on my home network and I'd restrict mac addresses and run full on WPA2 encryption to try and be safe and run a directional areial.
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willay
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Registered: 10th Nov 02
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heh use proper encryption then
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DaveyLC
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Registered: 8th Oct 08
Location: Berkshire
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quote:
Originally posted by pow
WiMAX might prove to find something interesting!
Yeah I was thinking of microwave but it gets expensive 
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willay
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Registered: 10th Nov 02
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WPA2 will do the trick
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willay
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mate just rid up some poles and try it out, doesnt cost much!
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DaveyLC
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Registered: 8th Oct 08
Location: Berkshire
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Going to cost me a good £200 in poles, amps and areials just to try
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Ludacris Turbo
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Registered: 28th May 04
Location: High Green, Sheffield
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Just run a cable...
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