gp,
Okay, I see where I went wrong. The slippage is taking place in my front yard, not yours.
My thoughts were centered on where -i.e., what part of the spectrum- those new interactive apps would take place towards the home, and I assumed incorrectly that full bidirectionality would go to the upper region of the band, as well. I'd like to discuss this a tad more, anyway.
When I pointed out the 5 MHz to 40 MHZ in my last post, I assumed that this swath of bandwidth was intended for Internet Access return path, only, and that it was a "pass through" [in and out] of the stb, feeding the CM. As in:
Head End --> HFC --> STB --> CableModem --> PC
I didn't envisage the 5 to 40 as the return path for the entire set of NEW interactive applications, in addition to the cable modem, though. But I guess it is, at least judging from the overview sketch in the "draft" you referenced.
It's always been a notion of mine that one of the benefits that would ultimately derive from going with a 750 or 864 MHz system would be the opening of new and cleaner spectrum for the reverse path. For some reason, I still think this is the case, although the document which you pointed me to doesn't support the idea. Unless I didn't get to that part yet ;-)
The out-of-band return path appears to be limited to only 3+ Mb/s. That's not a whole hell of a lot (not even 6 Mb/s, not by a long shot, it's extremely paltry) to be supporting both cable modem access to the Internet in the upstream, in addition to all of the enhanced cableco services upstream requirements that are coming down the pike, including Video Conferencing, which they call video telephony. Thanks again for those new references (the drafts). I hadn't seen them before.
FAC |
