Patent ID: 6185188
Filing Date: 2001-02-06
Classification: H04L

Abstract:
A method of controlling physical port flow rate in packet communications provided with a plurality of physical ports each for passing transfer units, and a plurality of virtual ports existing in correspondence to each of the physical ports and each for transmitting given transfer units to the corresponding physical port, which comprises:a step of deciding load data of the physical ports;a step of designating one of the transmittable physical ports on the basis of the load data;a step of designating the maximum delay virtual port which should be connected with the designated physical port, in parallel with the step of designating one of the transmittable physical ports; anda step of connecting the designated maximum delay virtual port with the designated physical port, and passing the transfer units,wherein the step of designating the maximum delay virtual port has:a step of observing transmission delay time at the virtual ports, respectively when there exist transmittable transfer units at the virtual ports, to designate the virtual port having the longest transmission delay time as the maximum delay virtual port; anda step of designating the virtual port at which the transmittable transfer unit develops first, as the maximum delay virtual port, when there exists no transmittable transfer unit at any virtual ports.