Re: Re: AD Evaluation comments on draft-ietf-rmt-bb-tfmcc-06
Magnus Westerlund <[email protected]>
| Newsgroups | gmane.ietf.rmt |
|---|---|
| Message-ID | <[email protected]> |
Hi, I am fine with this resolution. If anyone in the WG has objections please speak up. Joerg, please provide an updated draft. When I have received a satisfactory update I plan to go forward with IETF last call. That will also give the WG time to look at these changes before sending it to the IESG for approval. If anyone objects please send me a message. cheers Magnus Westerlund Your AD Joerg Widmer wrote: >>> Ok, I can include a sentence in section 3.6 that explicitly states >>> that slowstart is only used at the beginning before any of the >>> receivers has experienced any loss. >>> >> So if I as a sender stop sending, can I after any time use slow start >> again? If I can what rules applies. When does my acquired state become >> useless? > > Ok, I see what you mean. This is indeed missing from the draft. I > propose to do this similar to TFRC. > > If the the sender stops sending data packets, it records the current > sending rate X' = X. Every 10 RTTs the allowed sending rate will be > halved due to lack of feedback as specified in 3.3. This halving may > take place multiple times. When the sender resumes, it may perform a > slowstart from the current allowed rate up to the recorded rate X'. > > Receivers have to clear the have_loss flag after 10 RTTs without data > packets. have_loss is only used during slowstart, so this has no effect > if no packets arrived due to a network partition or packet loss. > Otherwise, if the sender is trying to do a slowstart after being idle, > everything will proceed as in the initial slowstart with it terminating > after the first packet loss by any of the receivers or as soon as X' is > reached. > > If you agree, I'd include a paragraph about this in the section on > slowstart and clarify that this only applies when the sender stops > sending due to lack of application data. > > Cheers, > Joerg > -- Magnus Westerlund Multimedia Technologies, Ericsson Research EAB/TVA/A ---------------------------------------------------------------------- Ericsson AB | Phone +46 8 4048287 Torshamsgatan 23 | Fax +46 8 7575550 S-164 80 Stockholm, Sweden | mailto: [email protected]