Slashdot Mirror
Texas to Get Broadband Over Power Lines
mrops writes "CNet is reporting that Texas will soon be getting broadband over power lines. From the article, "Broadband service over power lines (BPL) is not a new technology. People have been experimenting with building communication networks over power lines since the 1950s. But it hasn't caught on due to its low speed, low functionality and high development cost." Unfortunately this technology matured a bit too late and has been subdued by recent rush of wi-fi products. The technology has a lot of potential and wi-fi black zones are not an issue in simple home setups."
I thought the problem with IP on power lines is that power lines are really just large unshielded antennas. The IP traffic on them runs a frequencies that will jam Ham and other important radio traffic like air traffic control radio. Has Texas solved this problem or is it Damn The Ham!
BPL is bad for HAM. Shame on Texas!
(Tons of reference Links)
http://www.w4ovh.net/bplinfo.htm
(Other Links)
http://www.arrl.org/tis/info/HTML/plc/
http://groups.yahoo.com/group/BPLandHamRadio/
Required reading for internet skeptics
What this all translates into is a company that can offer power at a reduced price to its consumer, because of the associated cost savings and secondary revenue stream.
Sorry man but this translates into higher prices for any type of wireless in the area because you wipe out everything with god-damn huge antennas. See relavant wikipedia article:
Some groups oppose the proliferation of this technology, mostly due to its potential to interfere with radio transmissions. As power lines are typically untwisted and unshielded, they are essentially large antennas, and will broadcast large amounts of radio energy (see the American Radio Relay League's article). Because of their lack of shielding, the BPL systems are also at risk of being interfered with by outside radio signals.
Tesla sold Hearst on backing his power transmition system by telling him it was a way for mass communications. The communications were secondary to Tesla who was more interested it providing free power. Hearst pulled backing and had the tower demolished when he found out what Tesla was really up to. It was much like radio. Tesla designed the equipment for remote control and considered communications a secondary issue.
Well, I've actually used broadband internet over powerlines between June 2002 and July 2005. Ping-times were horrible, the service was mediocre at best, and the modem was a PITA. But it was easy to set up(and easy to plug out and return to the ISP). Mostly it was the ISPs fault, because they underestimated the use, and overestimated their own capacity. Claimed a normal speed of 1Mbit/s, I usually got a 256kbit/s service. Used a modem by the Swiss company Ascom.
She: Hey, are you a traitor? Me: No, I'm atheist.
I work for a company that is rolling out BPL in Arizona. I'm not 100% involved with the project but I get to sit in on a lot of meetings. What follows is my general understanding of how it works.
Currently the power companies have no way of monitoring their grid except for watching for major drops in consumption. Basically, they don't know your power is out until someone from your neighborhood calls them and lets them know.
We install what is basically a low end PC at each transformer which is used to inject the signal for the area covered by that transformer. There are additional apps running on the PC that are constantly communicating back to the power company about the state of the transformer, load, etc. If the node reports a problem or if communication to the node is lost they know there's a problem and can send someone right out. Should result in much higher response times.
MG
BPL is BROADBAND and appears throughout the HF spectrum, where there are LOTS of assigned users, some of whom are OTHER COUNTRIES MILITARIES, some of whom are our own, some of whom are international broadcasters, and some of whom are volunteers who provide emergency communications for just about any emergency that happens to take place, and almost all of which are covered by international treaty.
This kind of thing is called SCADA -- supervisory control and data acquisition, and it doesn't require BPL to accomplish. If the power companies are trying to claim it does, then look for the real agenda.
I live in eastern PA (Lehigh Valley Area) and was on the local trial of BPL.
;-).
Our power company, PPL, built up a network about a year ago that promised BPL at 1.5mbps symmetric for everyone. I actually got in on the first trials of the service... and it simply sucked. Firstly and foremostly, the speeds NEVER got ANYWHERE near 1.5mbps... in either direction... at any time of day. About half of the system was based on 802.11x wireless, which is what got the signal from the medium voltage lines (the ones that feed the transformers that get the power down to 110v) to the homes. This was done because otherwise, they would need a device to jump over every transformer, since the signal for BPL doesn't survive otherwise. So, as I was wardriving, I noticed a VERY big bunch of PPLBroadbandxxxxxx APs in the area, which I suspect caused part of the problem: too much signal, not enough bandwidth.
Other things I noticed (but were logical design decisions made by the system builders, not inherent limitations in the technology) include:
- Throttling of ICMP, which totally screwed with any traceroute or ping measurement when troubleshooting
- Use of unroutable IP space for end customers
- Authentication of end users not by the BPL modem's MAC (like cable modems work), but by the MAC of the first device behind it... a real headache for those of use switching out devices on a regular basis
All in all, BPL is one of those things that sounds good on paper, but is absolutely abysmal in practice. If I were to put my money on a future last-mile broadband technology, it would have to be DSL (newer DSL variations allow much greater distances from CO to demarc) or long-range wireless (WiMAX, low orbit satellite, 4G cellular, etc).
Just for the record, about a month ago, PPL gave up, took down all of their equipment and went home. I suspect it's being used down in Texas about now
-------------------------
It is the monkied monkey that monkies with another monkey's monkey. Monkey.