mo Plug-In Internet Connection to Get Test on Long Island]

[Dave Farber <dave () farber net>]

-------- Original Message --------
Subject: Re: [IP] mo Plug-In Internet Connection to Get Test on Long Island
Date: Sun, 26 Feb 2006 22:51:32 -0500
From: Dave Goldblatt <daveg () psyton com>
To: dave () farber net
References: <4401F532.2060801 () farber net>


> -------- Original Message --------
> Subject: RE: [IP] Plug-In Internet Connection to Get Test on Long Island]
> Date: Sun, 26 Feb 2006 13:08:29 -0500
> From: Bob Frankston <Bob2-19-0501 () bobf frankston com>
> To: dave () farber net, ip () v2 listbox com
> CC: 'Dewayne Hendricks' <dewayne () warpspeed com>
>
> This snippet (or LIPA) seems to confuse connectivity via the power lines to
> the house and the technologies for the power lines within the house. They
> are very different and essentially unrelated.
>
> BPL is about using the long runs of the power lines and getting past
> transformers but sometimes it's just about rights of way and the use of
> fiber or other technology.
>   
No, "Broadband over Power Lines", aka PLC (Power Line Communication)
does indeed refer to using medium- and low-voltage power lines for
providing a data path.   There are various mechanisms of using those
lines; some versions are power line end-to-end from the substation to
the customer's outlet, others use medium voltage for the backbone and
WiFi for end-user access, and another uses licensed radio spectrum for
the backbone and low-voltage lines for the end-user.

LIPA is not confusing the technology - you can read the RFP at
http://www.lipower.org/papers/rfp/bpl.html - it's quite specific as to
what they want.
> Power line within the house is something entirely different and there are
> some competing technologies including one going 200mbps. One can use BPL to
> the home and the wireless within or FTTH and then power line within the
> home. So far the within home power line products have not fared well
> against 802.11.
>
>   
Again, I'm not sure why you believe that communication within the house
(aka in-home BPL) and access BPL (that using the utility's medium- and
low-voltage lines) are entirely different - they can use different
protocols, but not necessarily.   For example, DS2 provides a 200Mb
solution which is used for both types of deployment.  HomePlug is
developing a similar product.

BPL has a different set of issues than 802.11 - some better, some worse,
but definitely different.

There are several standardization efforts underway - UPA, OPERA,
HomePlug, and IEEE to name a few.  What was it Andy Tanenbaum said about
standards... ?

ObDisclaimer: My employer manufactures access BPL equipment.

-dg-



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