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Large-scale distance questions

Discussion in 'Networking Issues' started by crawdaddy, Jul 9, 2006.

  1. crawdaddy

    crawdaddy Network Guru Member

    Hey guys,

    Even through my decent work with wireless networking, I still can't seem to get the whole distance thing figured out. I am going to be building a wireless network for the Boy Scout Camp I work at. (For those that want to get a visual lay of the land to help me the GPS location is 30°34'31.58"N, 89°21'33.10"W) Those coordinates are where my sat modem, and primary router are. In this camp, there is fairly dense woods, although it could be said that I almost have NLOS to these locations. This summer I somewhat pulled off this feat with just a 1 watt and a .5 watt amp and a couple of 7 db omni antennas. This only supplied 1 additional buiding other than the Admin, which has the sat modem in it, net. The connection was unstable and dropped off frequently.

    In the Admin building I am going to be using a second router to actually do the wireless network from. Directly north (.2 miles) of the Admin building (the building I gave the location of) is another building that I will be wanting to give wireless access to. To the southeast of the admin building also .2 miles away is another building that will need wirless. Finally, a set of 3 cabins .3 miles southwest of the admin building also needs access.
    What I was figuring on doing was to use (4) 1 watt amplifiers and a series of antennas to shoot the signal where it needs to get. I would use a 1 watt amp and a 15 db omni-directional antenna at the admin building to distribute the main line around.

    At each of the 3 reciever locations I would stick a 1 watt amp and a Backfire 14 dBi Reflector Antenna pointed at the omni. Attached to these amps would be routers running DD-WRT in client bridge mode. However, if I could pull off WDS to just repeat the signal in these buildings, that would be very preferable, but I'm not sure how having a high gain directiona antenna on one side and the stock rubber duck antenna on the other side would work.

    In conclusion, will this plan work? Am I constructing an overkill network? Will the omni that I am planning to stick at the Admin building be able to get a signal far enough back to the directional antennas. Thank you in advance for any and all help that people can provide.
  2. crawdaddy

    crawdaddy Network Guru Member

    I created a map of the locations I'm trying to link with the wireless network..
    I was thinking about it, do I really need the repeaters in the 3 client locations if I have that 15 db omni-directional antenna outside? I need to be able to reliably connect from all 3 locations.

  3. Esquire

    Esquire Mesquire Staff Member Member

    The map helps. Unfortunately at this point it is impossible to say anything for sure on paper. You are probably best served by performing a live test and see if a minimum configuration with the antennae alone is suffice, then add repeaters where necessary.
  4. Esquire

    Esquire Mesquire Staff Member Member

    PS. Nice avatar by the way. Remote controlled cars or a series of frame-by-frame capture?

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