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== The 5.8 GHz Option ==

The 5 GHz band has about 8 dB more loss than 2.4 GHz at long range. With 6 db loss, range is halved. So 5.8GHz will need more than twice the gain.

[http://www.atheros.com/pt/index.html Atheros Xtended range chips] claims receive sensitivities up to -105dBm. That's more than 10-20 dB better than other 802.11 chips.

D-Link [http://www.dlink.com/products/?pid=6 DI-624 Wireless Router], their [http://www.dlink.com/products/?pid=241 DWL-G810 "G" bridge] [http://www.pricegrabber.com/search_getprod.php?masterid=1165756&ut=d81a05f3a
c98c5f0&found=2&search=DWL-G810%20 $90 street] and Netgear's [http://www.dailywireless.org/modules.php?name=News&file=article&sid=1913 WGT634U Wireless Media Router] and [http://www.dlink.com/products/?pid=241 target=new>Netgear's G810 "G" bridge] use them.

[http://usa.asus.com/products/communication/wireless/wl-330/overview.hTm The tiny Asus Access Point] can also be used as a bridge. A long distance link might simply use a +23db, 5.8 GHz flat panel, with an Atheros Xtrended Range bridge plugged in. [http://www.dailywireless.org/modules.php?name=News&file=article&sid=1926 Could 100 mile WiFi Video] be possible?

Victoria to Port Angeles Wireless Link

http://www.dailywireless.org/images/up/portangeles.jpg

The [http://www.portangeles.org/ city of Port Angeles, Washington] is some 30 miles from Victoria British Columbia. This July 3rd, a "free" 802.11a link will be attempted between these two cities.

[http://trevormarshall.com/biquad.htm Trevor Marshall's biquad design], feeding a Primestar satellite dish has established [http://www.erlang-software.com/FreeNet/Rottnest has established a solid 30 mile capability] with 10-15 dB (SNR) link from Rottnest Island off the West Australian coast, to a number of APs on the escarpment east of Perth; a distance of 48 km (30 miles).

http://trevormarshall.com/bq-mount-thumb.jpg

http://trevormarshall.com/bq-front-thumb.jpg

http://martybugs.net/wireless/biquad/images/biquad_size.png

Technical Approaches

[http://www.trevormarshall.com/waveguides.htm Trevor Marshall], [http://www.e3.com.au/ Perth's Community LAN site, E-3], and [http://www.everettwireless.net/index.php Everett Wireless] have been building [http://members.iinet.net.au/~clark/FreeNet/Workshop.htm homebuilt waveguides].

Here's [http://www.dailywireless.org/modules.php?name=News&file=article&sid=683 a +22 dB design] made from [http://www.everettwireless.net/modules.php?op=modload&name=phpBB_14&file=index&action=viewtopic&topic=14&forum=4&1 aluminum foil and styrofoam].

http://www.sdots.com/photos/waveguides.jpg

[http://www.overclockers.com.au/article.php?id=118207 Tests with Long-Distance Waveguides] look good but a PrimeStar dish is likely to provide more gain.

The 5.8 GHz Option

The 5 GHz band has about 8 dB more loss than 2.4 GHz at long range. With 6 db loss, range is halved. So 5.8GHz will need more than twice the gain.

[http://www.atheros.com/pt/index.html Atheros Xtended range chips] claims receive sensitivities up to -105dBm. That's more than 10-20 dB better than other 802.11 chips.

D-Link [http://www.dlink.com/products/?pid=6 DI-624 Wireless Router], their [http://www.dlink.com/products/?pid=241 DWL-G810 "G" bridge] [http://www.pricegrabber.com/search_getprod.php?masterid=1165756&ut=d81a05f3a c98c5f0&found=2&search=DWL-G810%20 $90 street] and Netgear's [http://www.dailywireless.org/modules.php?name=News&file=article&sid=1913 WGT634U Wireless Media Router] and [http://www.dlink.com/products/?pid=241 target=new>Netgear's G810 "G" bridge] use them.

[http://usa.asus.com/products/communication/wireless/wl-330/overview.hTm The tiny Asus Access Point] can also be used as a bridge. A long distance link might simply use a +23db, 5.8 GHz flat panel, with an Atheros Xtrended Range bridge plugged in. [http://www.dailywireless.org/modules.php?name=News&file=article&sid=1926 Could 100 mile WiFi Video] be possible?

Port Angeles

Possible Locations

Vancouver Island

The Victoria Telecommunity Network and the BC Wireless Project are working on this as a joint project. Many thanks to the VTN for their willingness to help us with this project.

Possible Locations

  • Gonzales Observatory;
  • Mount Tolmie
    • Latitude: 48.45655
    • Longitude: -123.3259
    • Elevation: 112 meters
    • Located in Saanich, also City property.
  • Dominion Observatory aka: The Center of the Universe
    • Site A (Lower Scope)
      • Latitude: 48.52075
      • Longitude: -123.4193
      • Elevation: 183 meters
    • Site B (Administrative offices)
      • Latitude: 48.5192
      • Longitude: -123.4166
      • Elevation: 193 meters
    • Federal land, also a historic site.
  • Mount Douglas (approximated)
    • Latitude: 48.49414
    • Longitude: -123.3478
    • Elevation: 208 meters
    • Problems: Conservation society doesn't like antennas, lots of commercial antennas already up there.
  • Other site considerations: The West Coast Amateur Radio Association may have repeater sites we could hitch ROW off of.
  • Gear we have available:
    • One WRAP based Atheros box.
    • 2.4GHz antennae

Issues

Technical

  • Lets try to do 802.11b also, just in case the 802.11a stuff doesn't work out
    • A should be doable, if we have some nice antennas, and possibly a social "debate" on whether to use closed-source software or not.
  • Power sources are questionable, need generators and UPS probably
  • Need tested, pre-configured software and hardware
    • Configure routers with routes and IPs
    • Configure radio cards with proper channel assignments
    • Test end-to-end connectivity up close
  • Network diagrams
    • Just some well documented diagrams so we know what the heck we're doing
  • Communication between the two sites
    • amateur
    • cellular
      • International calls need to be made, can be expensive
      • Need a list of phone numbers in case of lost radio contact

Gear

PersonalTelco is offering to sponsor wireless gear to maintain a permanent link. Home brew antennae.

Logistic

  • Unavailibility among SWN people during this holiday (maybe another weekend in July)
  • SWN and PTP people should plan to stay the night in this area
  • Food, water, shelter, activities, socials, schedules, equipment, etc. details

Wireless campout? Anyone want to look for a campsite?

References

PortAngelesWashington (last edited 2007-11-23 18:02:03 by localhost)