Method for scheduling message cells leaving an atm node

Details Method for scheduling message cells leaving an atm node Method for scheduling message cells leaving an atm node

H - Electricity

04

L

H04L 12/56 (2006.01)

Patent

CA 2178557

Method for scheduling message cells leaving an ATM node Method for scheduling message cells leaving an ATM node and belonging to virtual connections by means of an output con- troller allocated to each of the outputs of the ATM node that method comprising the steps of storing message cells to be transmitted via the respective output in connection individual FIFO-queues, allocating two variables Ti,TSi to each of the FIFO-queues, whereby Ti defines the distance between consecutive message cells of a virtual connection i served at the rate ri=1/Ti and TSi denotes a time stamp for the message cell at the head of the FIFO-queue i, providing a virtual time variable VT, monitoring the peak cell rate individually for each of the virtual connections at the egress of the respective output controller, serving the FIFO-queue with the lowest time stamp for trans- mitting the message cell at the head of that FIFO-queue only when VTTSi and the peak cell rate for the respective virtual connection is not exceeded and updating the time stamp for that FIFO-queue if it is not empty with TSi?TSi+Ti after transmitting said message cell.

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