APPARATUS AND A METHOD FOR CONTROLLING NONLINEAR TRAFFIC CONGESTION IN AN ETHERNET NETWORK, CONCERNED WITH REDUCING A SYSTEM LOAD

摘要

PURPOSE: An apparatus and a method for controlling nonlinear traffic congestion in an Ethernet network are provided to reduce a system load by enabling each Ethernet switch to periodically transmit nonlinear burst traffics to a concentration Ethernet switch and the concentration Ethernet switch to prevent an overflow. CONSTITUTION: An overflow detector(10) sets an overflow threshold value for packets received from Ethernet switches. An overflow event generator(12) generates an overflow generation/release event and transmits it to a packet transmission permission token generator(14) and an overflow event receiver(20). A packet transmission permission token generator(14) periodically generates a packet transmission permission token and transmits it to a packet transmission permission token receiver(24). An overflow event receiver(20) receives the overflow generation/release event and informs a TCP connection controller(22) and a packet transmission flow controller(26). When the TCP connection controller(22) is informed the reception of overflow generation event from the overflow event receiver(20), it sets a TCP session connection between an Ethernet switch(200) and a concentration Ethernet switch(100). When the packet transmission permission token receiver(24) receives the packet transmission permission token from the packet transmission permission token generator(14), it requests packet transmission of an Ethernet switch from the packet transmission flow controller(26). The packet transmission flow controller(26) generates a queue for temporarily storing packets to be transmitted to the concentration Ethernet switch and then transmits packets according to a request from the packet transmission permission token receiver(24).