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Re: Electric utilities, IP addressing, and BPL (was Re: Google wants to be your Internet)
Hi Josh, According to our own experiments and real deployment experience in this field for many years, IPv6 is the best solution. Because the lack of support of IPv6 in many applications, we also keep IPv4+NAT, so actually is a dual stack situation, but all new sensors, meters, and apps. in general, can easily support IPv6 and make your life much easier. You may not need now IP up to the edge, but sooner or later, it will change, and also the high number of devices and networks that you want to put together. Having enough addresses provides you end to end connectivity, which again, may not be seen now as a real need, but it will become sooner or later. You can find lots of documents, from a project that we finish a couple of years ago at http://www.6power.org. They aren't updated up to the latest technology on this field, but sure are a good reading source. Regards, Jordi > De: Josh Gerber <joshgerber@xxxxxxxxx> > Responder a: <owner-nanog@xxxxxxxxx> > Fecha: Thu, 25 Jan 2007 11:56:31 -0800 > Para: <nanog@xxxxxxxxx> > Asunto: Electric utilities, IP addressing, and BPL (was Re: Google wants to be > your Internet) > > >> * From: Sean Donelan >> * Date: Tue Jan 23 15:06:02 2007 >> >> What do you do when the electric companies split up again, >> renumber the meters into different network blocks? > > Thanks for the discussion. It's rare I've seen a thread on NANOG > that's so pertinent to my own situation. > > I work for a fairly large utility faced with these very problems. We > are developing a ~half $billion project to replace our electric meters > with 2-way communicating ones, and have several other things going, > such as "intelligent grid" projects that will grow the size of our > networks many times over. I've also been on a broadband over power > line (BPL) project for a year and a half, and have a good > understanding of how & where it works, and where it doesn't. > > The US electric distribution grid, is, for the most part, quite dumb. > There are various SCADA and fault protection systems out there, but > not everything is automated, and certainly not everything is covered. > For example, when the power goes out somewhere, almost all of the > time, we don't know until we receive calls from customers. Not a > proactive system. Not the level of service that our customers want. > > Intelligent communicating meters are at the core of the modernization > of the grid (and of utility profits, if you look at it in certain > ways). You'll eventually find these meters tied to time-of-use > electric rates (more $$$ during peak times), as well as used as part > of an overall instrumentation effort of the grid. > > Demand response is also a piece of that puzzle. Shaving a few > megawatts on a hot day by reducing load (think 50,000 thermostats > having their temperature settings moved up a few degrees on a really > hot day) can mean avoiding building power plant and/or transmission > line capacity. The electric meter is potentially the utility's gateway > into a neighborhood or home network, and could enable those > applications. > > Instrumentation of the grid will also take sensor nets, on the order > of tens or hundreds of thousands of endpoints per distribution system. > We'll find similar networks in customer homes - the load control > boxes, the thermostats, etc., that will extend from our edge. > Potentially, hundreds of thousands more networks there. > > There are some utilities that will use BPL as a partial or whole > transport for metering & other utility applications, with the notion > that there's enough bandwidth to handle residential access services as > well (this will often be via a tenant or other 3rd party). While BPL > business cases won't be made without utility applications like meter > reading, it's unlikely they'll be made without an access play. The > other stuff just doesn't require the bandwidth. > > Do we need IP all the way to the edge of the network? We don't think > so. But the alternatives, such as adding ZigBee mesh networks beyond > the IP edge, have their own problems of scale & complexity. > > I've been following the notion that however far our IP network extends > out, IPV4 and RFC1918 have plenty of space for us. I'm reminded by > this thread, however, that M&A activities, among others, might one day > bite us for making that assumption. > > -jg ********************************************** The IPv6 Portal: http://www.ipv6tf.org Bye 6Bone. Hi, IPv6 ! http://www.ipv6day.org This electronic message contains information which may be privileged or confidential. The information is intended to be for the use of the individual(s) named above. If you are not the intended recipient be aware that any disclosure, copying, distribution or use of the contents of this information, including attached files, is prohibited.