A descriptor based system is used for scheduling the timely output of transport packets wherein each descriptor records {HEAD ~ a dispatch time} as well as a receipt time for {TAIL ~ each transport packet} 
A descriptor based system is used for scheduling the timely output of transport packets wherein each descriptor records { HEAD ~ a dispatch time } as well as a receipt time for { TAIL ~ each transport packet }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL