 NerdtalkerWorking Hard, Or Hardly Working?Premium,MVM
join:2003-02-18
Tucson, AZ | reply to jammmin
Re: Comcast considering offering 100 megabit inter This would be largely unfeasible, since it'd require almost 3 6Mhz wide 256QAM modulated downstream channels.  |
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 drakeOverdosed on confidencePremium,MVM
join:2002-06-10
Brooklyn, NY
kudos:5
 ·Verizon FiOS
| said by Nerdtalker:This would be largely unfeasible, since it'd require almost 3 6Mhz wide 256QAM modulated downstream channels. Are they proposing this with the current cable networking, with some upgrades to their system to handle those types of speeds? I was under the impression of fiber-optic service would be deployed to homes. |
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NerdtalkerWorking Hard, Or Hardly Working?Premium,MVM
join:2003-02-18
Tucson, AZ | said by drake:I was under the impression of fiber-optic service would be deployed to homes. It would have to be. There flat-out couldn't be any other feasible way. |
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 imrfPremium
join:2002-06-06
Utica, MI | said by Nerdtalker: said by drake:I was under the impression of fiber-optic service would be deployed to homes. It would have to be. There flat-out couldn't be any other feasible way. Sure there is, »www.pulse-link.com/wire_current.html.  Those speeds are quite easily attainable on HFC networks without FTTP. |
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NerdtalkerWorking Hard, Or Hardly Working?Premium,MVM
join:2003-02-18
Tucson, AZ | Awesome:
Up to 1.2Gbps downstream and up to 480Mbps upstream bandwidth – on top of the bandwidth and services already being carried by the network. The only negative thing is that everybody would have to buy a modem that works with that UWB data over cable technology. Not to mention some new headend equipment for modulating this special UWB implementation.
--
Touch a thistle timidly, and it pricks you; grasp it boldly, and its spines crumble. -William S. Halsey
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imrfPremium
join:2002-06-06
Utica, MI | said by Nerdtalker:The only negative thing is that everybody would have to buy a modem that works with that UWB data over cable technology. Which is why I am glad I decided to keep renting my modem.
Not to mention some new headend equipment for modulating this special UWB implementation. Yes, this is true, but a lot cheaper then running all the fiber needed to extend/add capacity to the limited amount of fiber being used on the HFC network, plus all the backend equipment for the all fiber network. |
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drakeOverdosed on confidencePremium,MVM
join:2002-06-10
Brooklyn, NY
kudos:5 Reviews:
·Verizon FiOS
| reply to imrf
Thanks, imrf  for the link. The article was quite interesting, and I was unaware of the technology. I thought in the coming years, cable broadband service would be obsolete since it wouldn't be able to meet the competition standards of the fiber-optic networks structured in the territory. I'm definitely impressed at the speed rate numbers: 1.2 Gbit/sec downstream and 480 Mbit/sec upstream.
I'm wondering if Cable operators are looking into the Pulse-Link technology, currently. According the article, it's quite inexpensive as there's no need to upgrade any of the current infrastructure; you just basically add the equipment at the subscriber's end to receive the frequencies.
Now, I'm curious; the signals used to provide the bandwidth is introduced to the head-end (CMTS), and the extracted to the user's home equipment? Keep in mind that it's 12:56 am here in NYC, and I may be a bit tired to actually comprehend the actual concept of expanding the bandwidth range, without any type of upgrades. Perhaps dummy terms would help? |
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 MortyPremium
join:2004-09-18 | said by drake:Now, I'm curious; the signals used to provide the bandwidth is introduced to the head-end (CMTS), and the extracted to the user's home equipment? Keep in mind that it's 12:56 am here in NYC, and I may be a bit tired to actually comprehend the actual concept of expanding the bandwidth range, without any type of upgrades. Perhaps dummy terms would help? Basically, from your new modem that supports it, to Comcast's CMTS or server. |
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Reviews:
 ·Comcast
| reply to Nerdtalker
Actually, this would be quite *feasable*, especially considering Comcast's plans for the *analog* side of cable TV.
Specifically, Comcast is planning nothing less than the *complete elinimation* of analog cable in all their markets by 2009. Digital cable will be the standard. Digital cable occupies less bandwidth than analog cable, plain and simple. A typical Comcast HFC system has six hundred 256QAM digital cable channels, plus another 100+ analog cable channels. (This does *not* include the single 256QAM channel used by cable modems.) Here's the surprise factor: the analog channels use as much bandwidth as the digital cable channels, despite that there are only one-sixth as many analog channels.
However, in order for this to work, Comcast *must* embark on a massive customer promotion (bigger than any promotion its ever done) to get their customers to switch, and the switch also can't cost them any more than all-analog does today. And the promotion must address their *entire* customer base: new customers and existing customers alike (in fact, *especially* existing customers, who are most likely to have a *box mix* of analog and digital boxes). |
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NerdtalkerWorking Hard, Or Hardly Working?Premium,MVM
join:2003-02-18
Tucson, AZ | said by PGHammer:A typical Comcast HFC system has six hundred 256QAM digital cable channels, plus another 100+ analog cable channels. Funny, the digital cable channels in my area are 64QAM modulated.
Anyways, despite how interestingly insightful your post was, I still can't see how 100 megabits down could even be possible using the same equipment everybody is using now, given that even an 8Mhz wide 256QAM modulated downstream channel can only deliver around 51 Megabits of bandwidth.
Unless there's a way to somehow double channel size while maintaining backwards-compatibility with existing equipment, I can't see it happening.
100 megabits is almost overkill in and of itself. I'd be happy with even 10 megabits at this point.
--
Touch a thistle timidly, and it pricks you; grasp it boldly, and its spines crumble. -William S. Halsey
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drakeOverdosed on confidencePremium,MVM
join:2002-06-10
Brooklyn, NY
kudos:5 | reply to imrf
Just those interested; there's a BBR article regarding UWB technology: »Ultra-Wideband |
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