patcat88
join:2002-04-05
Jamaica, NY
kudos:1 | said by openbox9:Why only 25% to the CLECs? Because bandwidth will run out too quickly if 2 copies of HBO and KNBC and WABC are going down the wire. You need to draw the line "must carry" channels, and CLEC exclusive channels, otherwise all the channels will be exclusive for some BS reason or another and the CLECs will all sign agreements to be exclusive to one content provider (now do you want Disney, but not Viacom, or do you want Viacom but not Turner, or do you want NBC Universal but not AETN?).
said by openbox9:I thought the point was to not have the infrastructure owner providing services. You're actually advocating throttling? How can you possibly have two service providers sharing a 38 Mbps channel? They either have the same tiers. Or pay per 100 GB on the DOCSIS channel. Or the plant owner fines CLECs who have top 5 percentile usage per 5 minute blocks during congestion. The only other choice is separate DOCSIS channels per CLEC, but it will be a crappy experience for all the CLECs because one channel will be little used, the other overloaded, and cable has capacity limits, 850mhz/6mhz QAM 256 channels=141 channels. 1 GHZ, which is rare, comes out to 166 channels, real world numbers are less because I'm not deducting for upstream channels.
said by openbox9:Somehow I doubt your plan works very well in the real world without a lot of node splits to deploy capacity deeper into the field. It doesn't, HFC sharing is very hard, but not impossible.
BPON/GPON has the same problems. Verizon loves PON plant since its almost IMPOSSIBLE to unbundle. Every 32 or 64 ports (FIOS seems to be 1.3 to 1.6 fibers per 1 family house from my amateur counting) share a 622/155 or 2500/1200 for GPON internet channel. DOCSIS style. DSL is circuit based, no opportunity for oversubscription except at the DSLAM, if the DSLAM lives at an RT (most of the USA), then the CLEC should be able to rent a fiber or TDM SONET circuit from the DSLAM (dedicated bandwidth pool) back to the CO. Canada is different from USA. Canada requires the ILEC to unbundle to the internet edge, a P2P circuit through the ILEC's national ethernet/ATM network from your customer to your datacenter, unlike the USA, this means in Canada, most DSL resellers are subject to the congestion domain of the ILEC's incumbent ISP. Some Canadian DSL resellers have their own DSLAMs at the CO, but the same problem of 80% of households being out of reach of the CO DSL comes up. PON internet users share a collision domain just like DOCSIS, except the collision domain is so large, currently there is no congestion.
Lets look at Verizon. Their plant is BPON (even if they have GPON equipment, they still only sell BPON tiers), 622 down. I'll assume the common tier everyone gets is 25/15, 32*25=800mbitps. Oversold. And FIOS uses the internet channel for VOD, which i think was 6mbitps per stream. It will be very tough to unbundle the FIOS PON. There is some hope. There is already one FIOS PON seller, »www.dslextreme.com/news/press/DSLXFiber.aspx but of course Verizon could kill them at any time, and Verizon makes up all the rules in that business agreement.
I've read that PON networks can be made open by running more F1 fibers to the FDH, then when you switch CLECs, at the FDH your plugged into a different CLEC's F1 back to the CO. So different CLECs have their own congestion domains and can under/over sell to their hearts desire. You can also retrofit a PON network to be totally P2P fiber up upgrading the F1 FDH to CO link with a unique fiber for every fiber at the FDH (in reality, it will probably be less than 1 F1 fiber for every F2 fiber).
Whats funny is, I've read (please confirm) is the US poster child of open access fiber, Utopia, has Active FTTH, the neighborhood cross connects are fiber ethernet switches. The worst possible choice for open access fiber. Not passive PON splitters, not P2P fibers back to the headend. Somehow I've never heard of Utopia turning into a traffic jam. I do know all but one of the Utopia ISPs have GB caps. I don't know if the caps are enforced. |
