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To: Frank A. Coluccio who wrote (4081)	1/11/1999 4:00:00 AM
From: Jay Lowe	Respond to of 29970

>> the forthcoming QoS "balloon payment" Ah ... interesting ... we made different meanings from that phrase. I coined it to refer to the condition in which a DSO installs X users on a segment explicitly or implicitly guaranteeing them a given level of service ... say 1.5Mbps or whatever. Voila! The users are happy and only gripe occasionally since they are using current generation applications. Lo and behold, next year 6 of the PC Mag Top 10 downloads are multimedia apps ... MP3 audio streaming from libraries of pay-per-hear music, MTV.COM pay-per-view, MP4-5 video clips from BlockbusterPreviews.Com, etc, etc. Now we have a problem ... the apparent QoS spirals into the trashcan. Fulfilling a user's level of expectation automatically creates a new level of expectation. DSO's are mostly deploying equipment which is not capable of QoS provisioning ... they are creating a system which cannot gracefully respond to the demand the system itself will create. There will be large costs associated with continuing to deliver reasonable service levels as the level of expectation "learns". Com21 had really nice QoS provisioning in their design; the currently deployed pre-DOCSIS designs are mostly dumb contenders as I understand it. There a QoS RFP ... software throttling ... I think ... don't know the status. Lot's of QoS issues ... ATHM is going to have to be agile in this area.