Forum Moderators: bakedjake
Not for large scale, but let's say that I have 10 computers scattered around town in something as a 2 mile radius. What should I do if I want to connect them wireless? No fixed line.
What kind of hardware, software would I need to start?
If I succeed, would it be legal? I mean, can you freely transmit data over public air?
I see this forum deals much with wireless technologies, so I thought this would be a decent place to put this topic.
Any ideas, resources, books or whatever info would be very handy! :)
I just might get a job to do something like this for this company I work for, but have no idea where to start, lol! But they don't know that :D
There's too a few legal questions because:
- a standard wifi spots produces a 30mw signal
- a standard wifi amplifier produces from 500mw up to 10w
- regulations change everywhere. I don't know where are you from but, in example, in Spain you can use the 2,4GHz and 5,4GHz bands where power limits are 100mW and 1W. Due to the standard nature of those protocols, probably the limits are similar where you are now.
Hope it helps you.
[edited by: Lexur at 6:46 am (utc) on May 15, 2009]
I think I could acquire all things you mentioned.
The thing is, we have like 10 PCs in various places around the city which connect to a panel screen and show some info, like weather, traffic and similar stuff.
Due to the specificity of these places, we are not able to use hard wire to connect, so our only option is wireless.
The problem is that there is only one major wireless internet provider here and they are expensive and they suck. Their support is awful and connectivity is even worse. Connections are sometimes down for days..
I just fired up Google Earth and got the exact radius we have.
From my calculations, if we measure from the middle spot is something as 0.8-1.0 km.
Hmm, that sounds kinda big to me :D
Do you think something like this could really be pulled off? Ofcourse if we did have the legal permission to do so.
My guess is that the central hub, or DSL line would be wirelessly distributed via antenna.
But I also read that when distances are such, there must be a special antenna which "skews" the line of sight from 360 to 180 or even less degrees.
Lol ! But our locations are in all directions, north, south, east..
Hmm, so if I need a small angle I'd have to place the antenna further away, correct? But then I'd end up with a distance approximately 6-9 km ! : D
Which I was Emmett Brown right now:)
If you can't lease appareils to make exact measures, your only solution will be to buy the system and test it live.
I'll need some good read cause my overall knowledge is still shallow, but I'm kinda puzzled what search terms to use on Google :P
One more thing, do you know what kind of receiving methods have those small USB sticks that many providers use for wireless internet? Majority operate on GPRS and UMTS.
Then again some of our ISP's quote upto 4 km on gsm to laptops with inbuilt wireless ..I have seen that kind of laptop work at about 1 km from the nearest known "relay" ..
would suggest that you talk to your local radio ham club ..
PS you will be crypting/decrypting on the fly ?
search term...wireless dispersed intranet systems or similar might get you going ..
seems I remember that Cisco do/did something along the lines of what you want ( for customers with large physical area sites like a few hundred acres or so ) might also look around them for ideas ..
police ( at least our gendarmerie nationale ) use something similar for their onboard vehicle special laptops ..
[edited by: Leosghost at 3:39 pm (utc) on May 15, 2009]
Ah yes.. notre petit budget : D Well we haven't actually discussed it yet.
The whole idea is not very market feasible.. if we were to charge people for our wireless network then it would be a different story. But as we need it only for our internal stuff..
What about GPS data? How can you hook to a satellite? lol, ignore that statement. My head is just full of random ideas.
