Community Broadband Networks 
  corner   
Home
Archives
RSS/XML
Recent Blog Headlines
About Al Bonnyman
"What's this blog thing about, anyway?"
Partial list: power utilities with fiber

Sponsored by:
Fiber Planners Inc.
Designers of fiber networks for electric utilities and communities.

News and comments on community broadband networks, the communities deploying them and the technologies that support them. Published by Denise Frey and Al Bonnyman.

Enter your email address below to subscribe to Community Broadband Networks:

powered by Bloglet
If the subscription form returns an error, send an e-mail to bonnyman@earthlink.net.

Index of 2100 previous posts since March 2003

PicoSearch
  Search help

Send news updates and feedback to:
Al Bonnyman

Sponsored by:

Fiber Planners logo


Some of the topics we cover:

  • ADSS cable technology
  • OPGW cable technology
  • Fiber to the home
  • Powerline broadband
  • Fixed wireless broadband
  • Other power utility telecom topics
  • Innovative fiber deployment technologies


Recent headlines:


Links to other blogs and free-form news sites:


Other links:


Note: comments posted are strictly the opinion of the poster and not necessarily those of Fiber Planners Inc. or any other posters.

 

Friday, February 27, 2004

 

What does the FCC's BPL ruling really mean?

Gary Box is an electrical engineer in Minneapolis who's spent much of his career dealing with RF (radio frequency) energy on power distribution systems. Of all the comments following the FCC's NPRM (notice of proposed rule making) on BPL (broadband over power line), I thought his were the most interesting:
"The FCC meeting was an interesting study in politics. All of the media picked up on the soundbites from the commissioners and little or none of the technical summary. I dont think the FCC has released the text of their proposed NPRM and, according to the summary from their engineering staff at the meeting, they will actually imposed more restrictions on BPL that it had the day before:"
  • "All of the BPL vendors had asked for increased emission standards; the emission standards were not changed."
  • "All BPL vendors claimed no interference. The NPRM would require all BPL vendors to provide active interference mitigation, thus admitting that interference would otherwise occur. In fact, the condition that BPL must shut down if notching and power reduction is not enough remains intact, as for all part 15 devices."
  • "All BPL vendors have been secretive as to the locations of their tests, and when confronted, claimed recorded interference did not come from them. The NPRM requires a national database recording the location, modulation and frequency of every BPL device. This effectively turns every BPL device into an easily tracked beacon."

"At the start of business on February 12, BPL could be deployed within the restrictions of all other Part 15 devices. When the NPRM is passed, BPL will be the most constrained of all Part 15 devices, more restricted than a baby monitor or cordless phone. This also makes BPL the least robust of all broadband approaches."

I am more optimistic about BPL than Gary, but the point is that it will take careful planning to successfully deploy a BPL system; deployments may not even be possible in some geographic areas depending on how much of the HF (high frequency) spectrum is already in use by government and private license holders.

#





Add email subscriptions to your blog with Bloglet! Weblog Commenting by HaloScan.com Listed on Blogwise
The Octopus Files
My Popdex Game Profile
Popdex
Metapop
Technorati Profile Creative Commons License
This work is licensed under a Creative Commons License.

This page is powered by Blogger.