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squircle

join:2009-06-23
Oakville, ON
reply to dsiemon

Re: [Internet] Per packet overhead on Bell's VDSL? ATM based?

I've made an appointment to see one of my old profs on Monday morning. He provided input to both the IEEE 802.3 working committee and the ITU on G.992 and G.993, so I'll see what he says. My gut instinct is to say that packet size doesn't matter (because it's not TDMA), but I'll tell you what he says. (And no, I'm not just doing this for you; you've got me interested!)

dsiemon

join:2012-09-26
Thanks. I'm very interested to see what he says.

I wouldn't expect the fact that VDSL2 is or isn't TDMA to have an affect on per packet/frame overhead but I'm not an expert on low level stuff like this.


squircle

join:2009-06-23
Oakville, ON
Well the reason why I mentioned TDMA is because a padded frame will "waste" upstream time slots (e.g. on a DOCSIS network), although on DOCSIS it really doesn't make a difference. Looking forward to tomorrow.