Internet via the mains net ?
Internet via the mains net ?
(OP)
I have heard and read about this way of supplying internet to the users, but can anybody give an expl. of how the 'backbone' of it works ?
Do you simply use the existing copper along the roads?
(In the US that is usualy in the kV area.)
What kind of carrier wave is used (freq. band)
Signal level ?
How about radio noise spreading from these miles long antennas ?
(We do have quite a lot of radio polution already from cell phones, bluetooth, wireless networks/keyboards/pointing devices etc.)
How about transmission loss ?
(We are not talking shielded or twisted pairs here)
A web address about this would be helpful, as I have now been asked about this by a couple of people.
Do you simply use the existing copper along the roads?
(In the US that is usualy in the kV area.)
What kind of carrier wave is used (freq. band)
Signal level ?
How about radio noise spreading from these miles long antennas ?
(We do have quite a lot of radio polution already from cell phones, bluetooth, wireless networks/keyboards/pointing devices etc.)
How about transmission loss ?
(We are not talking shielded or twisted pairs here)
A web address about this would be helpful, as I have now been asked about this by a couple of people.





RE: Internet via the mains net ?
http://www.hometownconnections.com/utility/broadba...
and
http://news.zdnet.com/2100-3513_22-5163739.html
and
http://www.cbc.ca/stories/2003/11/21/Consumers/pow...
and
http://www.newsfactor.com/story.xhtml?story_title=...
and
http://www.eham.net/articles/9013
RE: Internet via the mains net ?
If a signal is strong enough it will force its way into any radio even if it is tuned to a different frequency. Strong radio signals can also force themselves into any analog equipment that does not have tuned circuits. I had an instance where WQMX-FM forced its way into a public address system that was in the next county.
There is also another problem that some utilities such as Ohio Edison already use powerline carrier on their distribution lines to control capacitors. Leviton's and Radio Shack's home automation/remote control systems are unusable on Ohio Edison's system unless you are supplied from a dedicated padmount transformer and your service lateral runs in the opposite direction from the primary - the home controls use the same frequencies and protocols as the capacitor controls.
Mike Cole, mc5w@earthlink.net
RE: Internet via the mains net ?
http://ambientcorp.com
RE: Internet via the mains net ?
"I need to connect my PLC to my ISP using TCP/IP with a PLC..."
"Venditori de oleum-vipera non vigere excordis populi"
RE: Internet via the mains net ?
"Venditori de oleum-vipera non vigere excordis populi"
RE: Internet via the mains net ?
RE: Internet via the mains net ?
http://www.arrl.org/tis/info/HTML/plc/aud-vid.html
http
http://www.rac.ca/news/barry.zip
http://www.qrpis.org/~k3ng/bpl.html
http://
http://www.wave-report.com/tutorials/bpl.htm
ht
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http://w
RE: Internet via the mains net ?
The problem is that there are problems all over that frequency range. So it does not work very well. Frequency inverters and low-energy lamps are the worst polluters. And if you apply filtering to get rid of the interference, guess what? You also filter the communication signal away!
My personal opinion is that Power Line Communication will never work for the Internet. It just barely works for metering purposes, which is a low-speed application with a few kilobytes of data being transmitted occasionally.
"Power Line ADSL" is an engineers pipe dream.
RE: Internet via the mains net ?
A 12kv power line is not impedance controlled
at data frequencies. What about where power lines
tee off to other neighborhoods. This is not allowed
in a real data tranmission line because it
creates a mismatch. How can this equipment be
designed to bypass the distribution transformer with
data and still be economical. If this bypass fails
you could die while surfing the net.
I am sure this can be made to work in a few places
for long enough to interest a lot of investors with
more money than sense but can it really serve
enough people to be profitable given the cost??