Re: [tsvwg] New Version Notification for draft-white-tsvwg-lld-00.txt
Greg White <g.white@CableLabs.com> Tue, 12 March 2019 02:18 UTC
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From: Greg White <g.white@CableLabs.com>
To: Luca Muscariello <luca.muscariello@gmail.com>
CC: "tsvwg@ietf.org" <tsvwg@ietf.org>
Thread-Topic: [tsvwg] New Version Notification for draft-white-tsvwg-lld-00.txt
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Date: Tue, 12 Mar 2019 02:18:01 +0000
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Subject: Re: [tsvwg] New Version Notification for draft-white-tsvwg-lld-00.txt
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Hi Luca, You can find the details in Annex P of the DOCSIS MULPIv3.1 spec. https://specification-search.cablelabs.com/CM-SP-MULPIv3.1 -Greg From: Luca Muscariello <luca.muscariello@gmail.com> Date: Monday, March 11, 2019 at 6:26 PM To: Greg White <g.white@CableLabs.com> Cc: Dave Taht <dave@taht.net>, Jonathan Morton <chromatix99@gmail.com>, "tsvwg@ietf.org" <tsvwg@ietf.org> Subject: Re: [tsvwg] New Version Notification for draft-morton-taht-tsvwg-sce-00.txt Hi Greg, I'm curious about the queue protection function in the LLD document. It seems to assume that a flow table is maintained to determine if a flow has the right to enter the low latency queue. Can you give more details about that component? Or point me to a reference? Thanks Luca On 3/11/19, 5:29 PM, "tsvwg on behalf of Greg White" <tsvwg-bounces@ietf.org on behalf of g.white@CableLabs.com> wrote: TSVWG, I've posted a new informative draft that gives an overview of the new Low Latency DOCSIS specification (see links below). This overview may be interesting to TSVWG participants because it includes support for L4S (https://datatracker.ietf.org/doc/html/draft-ietf-tsvwg-aqm-dualq-coupled) and for the NQB PHB (https://datatracker.ietf.org/doc/html/draft-white-tsvwg-nqb). Best Regards, Greg On 3/11/19, 5:05 PM, "internet-drafts@ietf.org" <internet-drafts@ietf.org> wrote: A new version of I-D, draft-white-tsvwg-lld-00.txt has been successfully submitted by Greg White and posted to the IETF repository. Name: draft-white-tsvwg-lld Revision: 00 Title: Low Latency DOCSIS - Technology Overview Document date: 2019-03-11 Group: Individual Submission Pages: 25 URL: https://www.ietf.org/internet-drafts/draft-white-tsvwg-lld-00.txt Status: https://datatracker.ietf.org/doc/draft-white-tsvwg-lld/ Htmlized: https://tools.ietf.org/html/draft-white-tsvwg-lld-00 Htmlized: https://datatracker.ietf.org/doc/html/draft-white-tsvwg-lld Abstract: NOTE: This document is a reformatted version of [LLD-white-paper]. The evolution of the bandwidth capabilities - from kilobits per second to gigabits - across generations of DOCSIS cable broadband technology has paved the way for the applications that today form our digital lives. Along with increased bandwidth, or "speed", the latency performance of DOCSIS technology has also improved in recent years. Although it often gets less attention, latency performance contributes as much or more to the broadband experience and the feasibility of future applications as does speed. Low Latency DOCSIS technology (LLD) is a specification developed by CableLabs in collaboration with DOCSIS vendors and cable operators that tackles the two main causes of latency in the network: queuing delay and media acquisition delay. LLD introduces an approach wherein data traffic from applications that aren't causing latency can take a different logical path through the DOCSIS network without getting hung up behind data from applications that are causing latency, as is the case in today's Internet architectures. This mechanism doesn't interfere with the way applications share the total bandwidth of the connection, and it doesn't reduce one application's latency at the expense of others. In addition, LLD improves the DOCSIS upstream media acquisition delay with a faster request-grant loop and a new proactive scheduling mechanism. LLD makes the internet experience better for latency sensitive applications without any negative impact on other applications. The latest generation of DOCSIS equipment that has been deployed in the field - DOCSIS 3.1 - experiences typical latency performance of around 10 milliseconds (ms) on the Access Network link. However, under heavy load, the link can experience delay spikes of 100 ms or more. LLD systems can deliver a consistent 1 ms delay on the DOCSIS network for traffic that isn't causing latency, imperceptible for nearly all applications. The experience will be more consistent with much smaller delay variation. LLD can be deployed by field-upgrading DOCSIS 3.1 cable modem and cable modem termination system devices with new software. The technology includes tools that enable automatic provisioning of these new services, and it also introduces new tools to report statistics of latency performance to the operator. Cable operators, DOCSIS equipment manufacturers, and application providers will all have to act in order to take advantage of LLD. This white paper explains the technology and describes the role that each of these parties plays in making LLD a reality. Please note that it may take a couple of minutes from the time of submission until the htmlized version and diff are available at tools.ietf.org. The IETF Secretariat
- Re: [tsvwg] Fwd: New Version Notification for dra… Luca Muscariello
- [tsvwg] New Version Notification for draft-white-… Greg White
- Re: [tsvwg] New Version Notification for draft-wh… Greg White
- Re: [tsvwg] New Version Notification for draft-wh… Luca Muscariello
- Re: [tsvwg] New Version Notification for draft-wh… Greg White
- Re: [tsvwg] New Version Notification for draft-wh… Luca Muscariello
- Re: [tsvwg] New Version Notification for draft-wh… Greg White
- [tsvwg] Fwd: New Version Notification for draft-w… Luca Muscariello
- Re: [tsvwg] Fwd: New Version Notification for dra… Tilmans, Olivier (Nokia - BE/Antwerp)
- Re: [tsvwg] Fwd: New Version Notification for dra… Luca Muscariello
- Re: [tsvwg] Fwd: New Version Notification for dra… Tilmans, Olivier (Nokia - BE/Antwerp)
- Re: [tsvwg] Fwd: New Version Notification for dra… Luca Muscariello
- Re: [tsvwg] Fwd: New Version Notification for dra… Luca Muscariello
- Re: [tsvwg] Fwd: New Version Notification for dra… Greg White
- Re: [tsvwg] Fwd: New Version Notification for dra… Luca Muscariello
- Re: [tsvwg] Fwd: New Version Notification for dra… Greg White
- Re: [tsvwg] Fwd: New Version Notification for dra… Luca Muscariello
- Re: [tsvwg] Fwd: New Version Notification for dra… Greg White
- Re: [tsvwg] Fwd: New Version Notification for dra… Bob Briscoe