Phylop
Premium
join:2002-11-17
Reston, VA
|  Upstream channel bonding!
I've been hearing about this delayed upstream channel bonding for quite a while now, I guess it's good to at least get the downstream speeds up, but what "power users" really want is much faster upstream speeds, especially if Cable is going to compete with Verizon FiOS, currently offering 20mbit/s upstream speeds in some tiers.
Otherwise, more technically, how can they manage that downstream speed of something around 100mbit/s with an upstream of merely 2mbit/s? I thought because of the "token bucket" QoS system that most cable companies used the downstream was somewhat dependent on the upstream. Can someone clarify this for me? |
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Rick
Premium,MVM
join:2001-02-06
Waterbury, CT
clubs: 
| While it may be true that Comcast
only has docsis 3.0 in one market so far it looks like it's coming on fast and furious in others with it reportedly now being rolled out in New England and currently in the overnight testing phase.
»Docsis 3.0 is Coming Soon to New England
--
The Coyote captured the RR! Roadrunner Rick is now Comcastic! |
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Lumberjack
Premium
join:2003-01-18
Newport News, VA | It could be capabile of 1GB down and 500GB up but...
We'd still only see 5MB down and 256KB up.
Still happy I have Verizon but even so my max upload is 5MB here (unless I want to pay over $100/mo).
--
»www.fairtax.org |
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TKJunkMail
Enjoy the sun
Premium
join:2002-03-03
Avalon, NJ
 ·Sprint Mobile Broa..
 ·Comcast
| reply to Phylop
Re: Upstream channel bonding!
said by Phylop  :Otherwise, more technically, how can they manage that downstream speed of something around 100mbit/s with an upstream of merely 2mbit/s? I thought because of the "token bucket" QoS system that most cable companies used the downstream was somewhat dependent on the upstream. Can someone clarify this for me? You are right expecting an upload limit having an effect on how fast you can download. But 2 mbps upload(if no other traffic using the upload like a P2P app) would allow an FTP download for example to reach the full download capacity.
But most users would be running multiple connections and apps utilizing upload bandwidth that could ultimately make downloads not be able to use the full download capacity.
--
My BLOG .. .. Internet News .. .. My Web Page
Ask yourself one question: 'Do I feel lucky?' Well, do ya punk? |
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Phylop
Premium
join:2002-11-17
Reston, VA
| reply to Lumberjack
Re: It could be capabile of 1GB down and 500GB up but...
said by Lumberjack :We'd still only see 5MB down and 256KB up. Still happy I have Verizon but even so my max upload is 5MB here (unless I want to pay over $100/mo). Comcast currently offers upload speeds much faster than 256kbit/s, Verizon FiOS offers it's 20/20 tier for $69.99 a month. I see your point, but don't exaggerate. |
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RARPSL
join:1999-12-08
Suffern, NY
| reply to TKJunkMail
Re: Upstream channel bonding!
said by TKJunkMail :You are right expecting an upload limit having an effect on how fast you can download. But 2 mbps upload(if no other traffic using the upload like a P2P app) would allow an FTP download for example to reach the full download capacity. TCP/IP is a 2-way communications protocol. To be able to download, you have to upload acknowledgements of the successful receipt of the downloaded packets. There are ways to reduce the need for the upload bandwidth load but even that has a limit (at least until IPv6 is used which allows larger [AKA Jumbo] packets and larger/sliding transmit windows). Each 1500 packet with download data needs a upload packet to say that the downloaded packet has arrived. That uploaded packet controls how fast you can download since you will not be eligible for more downloaded data until you acknowledge the receipt of the "in flight"/prior packets. The ACK packets tend up be small and the major part is the Headers/Overhead not the actual payload content. Thus if you saturate your upload session with the small ACK packets, you can not download any faster. There is also the case where YOU are doing the uploading (such as SENDING not RECEIVING Email) where you are being lock-stepped by maxing out the upload channel. |
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Mari
@verizon.net
| We're Past the Pre-Cert Stage
We're deploying fully certified/qualified DOCSIS 3.0 gear now. Motorola's got commercial D3.0 deployments in Japan and Korea, with shipments of D3.0 modems to a North American MSO already happening at production volumes.
»connectedhome2go.com/2008/09/18/···is-here/ |
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DaveNJ
No Fear
join:1999-09-01
New Jersey | reply to Phylop
Re: Upstream channel bonding!
I totally agree upstream is becoming more important. Without equal or, close to equal upstream. Any machine doing any activity will lock up, and get timeouts. What good is 20M if you have 2M upload. It prevents the usage. |
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Eat Me
join:2002-09-25
Sussex, NJ | Service Electric
Aren't they deploying DOCSIS 3.0 as well for their 30/2 tiers? |
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Ignite
Premium,VIP
join:2004-03-18
UK
clubs:
·BlueYonder Interne..
 ·Be There
1 edit | Upstream Bonding is There
The Casa Systems C2200 and C3200 CMTS both have full gold certification - downstream and upstream bonding, they received these in certification wave 58, results released in May.
»www.casa-systems.com/prod_C2200.htm
»www.casa-systems.com/prod_C3200.htm
quote:
Channel bonding of up to 16 downstream and 16 upstream channels, AES encryption, IPv6 for cable modems.
In addition in Europe we're deploying EuroDOCSIS 3, 8MHz RF channels at 51Mbps per channel - this tech is being deployed everywhere that uses 8MHz channels in their spectrums. |
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Ignite
Premium,VIP
join:2004-03-18
UK
clubs:
·BlueYonder Interne..
·Be There
| reply to Mari
Re: We're Past the Pre-Cert Stage
said by Mari :We're deploying fully certified/qualified DOCSIS 3.0 gear now. Motorola's got commercial D3.0 deployments in Japan and Korea, with shipments of D3.0 modems to a North American MSO already happening at production volumes. » connectedhome2go.com/2008/09/18/···is-here/ The BSR has D3 gold certification? I must've missed that I thought it only had bronze (no upstream bonding). |
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FIB3RTECH
@comcast.net
| reply to Mari
said by Mari :We're deploying fully certified/qualified DOCSIS 3.0 gear now. Motorola's got commercial D3.0 deployments in Japan and Korea, with shipments of D3.0 modems to a North American MSO already happening at production volumes. » connectedhome2go.com/2008/09/18/···is-here/ We went with the Cisco 10K product... We've had really good luck with Cisco over the years. |
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Mari
@comcast.net | reply to Ignite
Sorry- it's still bronze, but it is considered qualified, not pre-cert. |
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Ignite
Premium,VIP
join:2004-03-18
UK
clubs: | Sure but no upstream bonding  |
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Ignite
Premium,VIP
join:2004-03-18
UK
clubs: | reply to FIB3RTECH
Also no upstream bonding though, and in Comcast's case not even running DOCSIS 3 but running DOCSIS 2B - DOCSIS 3 is required to have at least 4 bonded downstreams while Comcast are running on 3. |
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Done_Posting
Shoot to kill
Premium
join:2003-08-22
Toledo, OH
·buckeye cable
| reply to Lumberjack
Re: It could be capabile of 1GB down and 500GB up but...
said by Lumberjack :Still happy I have Verizon but even so my max upload is 5MB here (unless I want to pay over $100/mo). Wow, you have 40 Mbps of upstream and you're paying less than $100 a month? That's terrific!
»en.wikipedia.org/wiki/Mbps#.27b.···_.27B.27
- Tate
--
Happiness is an OC-768 in your basement... |
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Done_Posting
Shoot to kill
Premium
join:2003-08-22
Toledo, OH
·buckeye cable
| reply to Ignite
Re: We're Past the Pre-Cert Stage
said by Ignite :Sure but no upstream bonding We have upstream bonding... in our lab. 
- Tate
--
Happiness is an OC-768 in your basement... |
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Natoma
join:1999-08-30
Brooklyn, NY
 ·Verizon FIOS
| reply to Lumberjack
Re: It could be capabile of 1GB down and 500GB up but...
quote:
Videotron was the first carrier in north America to offer pre-cert speeds, delivering both 30Mbps ($64.95) and 50Mbps ($79.95) tiers with 30Gb and 50GB caps, respectively.
What I find laughable is Videotron's caps.
50GB/month caps for 50mbit downstream?? You'd get that in 2hrs with your connection maxed out.
Hell, I downloaded 7 HD movie rentals a few weeks ago to my AppleTV, each at 4-6GB a pop. Good grief Videotron.
Cable's a goddamn joke. So happy I've got my uncapped, unmetered 50/20 FIOS. Only $89 too. |
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dirtwarrior
join:2008-03-21 | reply to Lumberjack
really here in, MD, we get slammed hard by taxes and 20/20 internet is $69 a month whith out a triple play deal. an VA you pay about $13 less $57 respectively so I dont see where you would pay $99 a month for anything above 5up respectively. |
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tenpin784
I Went To The Dark Side?
join:2001-03-30
New Durham, NH | I am still waiting
Until I can even start playing with DOCSIS 3.0 gear
I want in!!!! |
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