Szilveszter, Thank you for the review and comments. I will update the draft with your suggestions.
On your question, DOCSIS-PIE does not utilize fair queuing. DOCSIS modems do support multiple queues, but each queue is (generally) an independent MAC layer service, with independent QoS configuration and scheduling. The general-purpose PIE algorithm does rate estimation so that it can work in systems where the egress rate is not otherwise known. We did experiment with an FQ-PIE implementation, as described in: http://www.cablelabs.com/wp-content/uploads/2014/06/DOCSIS-AQM_May2014.pdf Even in this case, we chose to not utilize egress rate estimation. -Greg On 3/29/15, 3:16 AM, "Szilveszter Nadas" <[email protected]> wrote: >Hi, > >You have an interesting process to encourage mic comments. ;) > >Reviewed version: "draft-ietf-aqm-docsis-pie-00". > >I did read the document, looks good from clarity perspective. The changes >compared to PIE also look reasonable. > >I cannot judge however how well the algorithm estimates PIE behavior or >how good is it in general. I did not read the references. > >Questions: >-" 3.2. Departure rate estimation" Pie implements a rate estimator >because it might be used with Fair Queueing schedulers. You write " >Third, in the significant majority of cases, the departure rate, while >variable, is controlled by the modem itself via the pair of >token bucket rate shaping equations described". I assume that Fair >Queueing is either not implemented then in the modem or it is rarely used >together with PIE. Is it so, or do I misunderstand this? Please clarify >this for me and also in the document, if you think that is applicable! > >I propose the following updates (all optional in my view but it would >definitely help the reader): >-State that the "[DOCSIS*" documents do contain simulation results. It >was not clear for me from just reading the draft. >-Write a short (<0.5 page) summary of the simulation results in the >appendix. > >Cheers, >Szilveszter > >-----Original Message----- >From: Scheffenegger, Richard [mailto:[email protected]] >Sent: Friday, March 27, 2015 16:53 >To: Greg White; Mikael Abrahamsson; Dave Dolson; Szilveszter Nadas >Cc: [email protected]; '[email protected]' >Subject: RE: [aqm] adoption of draft-white-aqm-docsis-pie-01 > >Hi group, > >as there haven't been any objections, but some indications of support on >the list, and based on the responses in the IETF92 meeting in Dallas, we >chairs think this document can be adopted as WG-item at this time. > > >Greg, can you please upload the most recent version as >draft-ietf-aqm-docsis-pie-00? > >Also, as mentioned in the meeting, and to make true of my promise, I >would like to invite the following individuals to review this draft, once >the updated version becomes available. > >Mikael Abrahamsson >Dave Dolson >Szilveszter Nádas > >Mostly everybody else who has commented during the meeting is already >assigned to other documents (Nobody will be left out :) > >Thanks, > Richard (co-chair) > > > >> -----Original Message----- >> From: aqm [mailto:[email protected]] On Behalf Of Scheffenegger, >> Richard >> Sent: Donnerstag, 26. Februar 2015 08:45 >> To: Greg White; '[email protected]' >> Cc: Rong Pan (ropan); [email protected] >> Subject: Re: [aqm] adoption of draft-white-aqm-docsis-pie-01 >> >> Hi Greg, group, >> >> >> >> Regarding the adoption call, this is something we can actually (and >> should) start on the list. >> >> We can confirm that during the Dallas meeting in the room, but even >> before that, we'd like to get responses on the list now... >> >> Perhaps we have some volunteers to review this new version as well... >> >> >> Best regards, >> Richard >> >> >> >> > -----Original Message----- >> > From: Greg White [mailto:[email protected]] >> > Sent: Donnerstag, 26. Februar 2015 01:13 >> > To: [email protected] >> > Cc: Rong Pan (ropan) >> > Subject: Re: [aqm] agenda for IETF 92 / Dallas >> > >> > Wes & Richard, >> > >> > Unfortunately I will not be at IETF92 in person, but will attend >> remotely. >> > For draft-white-aqm-docsis-pie, Rong & I updated it in January and >> > included a new appendix to give a change log, which reads: >> > >> > =============== >> > Appendix B. Change Log >> > B.1. Since draft-white-aqm-docsis-pie-01 >> > >> > Added Change Log. >> > >> > Removed discussion of Packet drop de-randomization, Enhanced burst >> > protection, and 16ms update interval, as these are now included in >> > [I-D.ietf-aqm-pie]. >> > >> > =============== >> > >> > >> > Regarding WG adoption, I saw some support from Lars (and no >> > objections) >> to >> > adopting it on an Informational track. Will you do an official >> adoption >> > call at the Dallas meeting? >> > >> > -Greg >> > >> > >> > On 2/23/15, 8:40 PM, "Wesley Eddy" <[email protected]> wrote: >> > >> > >Greetings AQMers! We requested a short AQM meeting slot at the >> > >upcoming IETF 92 meeting in Dallas, and we received a 1-hour slot >> > >on >> Tuesday: >> > >https://datatracker.ietf.org/meeting/92/agenda.html >> > > >> > >Since this is not a lot of time, we'll need to prioritize the work >> > >that is discussed to what requires the face-to-face time in order >> > >to make progress on. >> > > >> > >For active draft editors, please let us know via this list or >> > >[email protected] what you think your meeting time needs >> > >are, so we can put together an agenda. If you don't need meeting >> > >time now, or would like to use an interim telecon to assist in >> > >gathering feedback, please also let us know. >> > > >> > >For others, please read the drafts, comment on this mailing list, >> > >and help us to review and complete them: >> > >https://datatracker.ietf.org/wg/aqm/documents/ >> > > >> > >Thanks in advance! >> > > >> > >-- >> > >Wes Eddy >> > >MTI Systems >> > > >> > >_______________________________________________ >> > >aqm mailing list >> > >[email protected] >> > >https://www.ietf.org/mailman/listinfo/aqm >> >> _______________________________________________ >> aqm mailing list >> [email protected] >> https://www.ietf.org/mailman/listinfo/aqm _______________________________________________ aqm mailing list [email protected] https://www.ietf.org/mailman/listinfo/aqm
