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Duane, all,  The motivation, as I recall, for exploring upstream fragmentation was to answer the question of does it reduce buffer memory requirements in the OLT. I would suggest if possible to focus on that question first before we get too deep into the details.  If there isnâ??t a clear win on memory savings, then I suggest not getting into the fragmentation complexity and staying with whole packets.  Perhaps select one or two â??schedulingâ?? models, then focusing on the re-assembly details in the OLT?  Mark  From: Duane Remein [mailto:Duane.Remein@xxxxxxxxxx]  Glen/Marek, During the call today you both expressed concerns about fragmentation. Do the following two questions adequately capture your expressed concerns? If not please clarify. 1)     In a multi-lane mixed capability network (mix of 25G, 50G & 100G ONUs) how would fragmenting avoid loss of capacity due to gaps between bursts? 2)     In a multi-lane mixed capability network how could fragmenting allow an ONU that is bursting on X lanes expand its transmission to X+m (ex. go from 2 lane transmission to 4 lane transmission) smoothly? Best Regards, Duane  FutureWei Technologies Inc. Director, Access R&D 919 418 4741 Raleigh, NC  |