Connect Wirelessly to PC on 5th Floor of a Apt.Distance is atleast 175 Mtrs from hub

Hello. I'm experienced with wired networking but I've never really done much with wireless equipment. Unfortunately for me, I've got a situation that requires it. We have to provide Internet service for one of the flats (on 5th floor) in a building and the distance is about 150 to max 175 metres from our nearest hub. You can say we can run CAT5e to the spot but we can't do it in this situation as the stupid apartment president doesn't allow the same for his own dumb selfish reasons.

Here's the situation:
1. A flat is on the 5th floor of the distance between the PC and where i can put a Wireless Router is about 150~175 metres or so.
2. I can't have any above-ground cabling and I've been asked to use wireless instead of using CAT5.
3. Our hub will have an Internet connection that will connect to any Wireless Router you can suggest to or which is compatible with other hardware in this setup.
4. We may also need to connect few other flats in the apartment (which is quite big upto 500 metres radius with many flats in it) in very few days wirelessly.
5. There is NO LINE OF SIGHT at all places.
5. I'm fairly sure that I will need to provide some kind of wireless router/ repeater for them to connect to.
6. I am from Hyderabad, India and Wireless networking equipment access is very much limited.
7. I prefer if you suggest equipment which operates on IEEE 802.11 b as it is much economical.

I've done some poking around for answers but haven't figured out anything concrete just yet relative to my situation though i found few on connecting two Wireless Routers Wirelessly.

Any help would be appreciated. Please do mention about the complete hardware required along with firmware details and any practical examples of such similar situations if you have already solved before.

I would like to add that i can't have devices in network which requires AC power supply. Also i found something here at hField Technologies, Inc. and i would like to know if it would be helpful to me.

If you cannot get access to AC power, what power do you have access to to power the APs?

Regards

Fred

I can power them using DC if the AP supports. But as i mentioned above, i can not have any other equipment in between the wireless link.

I have illustrated using this image

Ther are many AP/Routers available that operater on low voltage 5-12vdc and some that operate on PoE @ 48vdc. I am using Linksys devices as they can operate @ 12vdc and I just use a car battery with a solar panel.

Your issue is one of getting the signal from the PC to the hub. Not seeing the actual site, and going by your description I would guess and say you may need to run several devices to repeat the signal to get it to where you need it. Remember that that an AP/Router doesn't have to be connected to an ethernet card or WAN to operate as a repeater.

I would suggest looking at places where you can install devices in much a manner that you can get a line of site between the builds. This may mean placing a repeater somewhere in between the 2 buildings to achieve this. Then work out how you are going to get the signal to the termination points (clients). This may also mean using a repeater again to get sufficient signal strength to the clients.

Also don't think straight (wifi signals never travel in a straight line). Use devices (APs) to move the signal around obsticals (around also implies over). Also look to using "B" mode only, most if not all wireless devices give much better specs on the lower bandwidth.

I hope that some of my comments are helpfull.

Regards

Fred