Patent ID: 6208653
Filing Date: 2001-03-27
Classification: H04L,H04Q

Abstract:
A method for controlling a flow between terminals in an ATM network, said ATM network comprising:a gateway unit for accommodating a first LAN, for converting a first packet transmitted from the first LAN into a plurality of ATM cells, for transferring the ATM cells to the ATM network, for converting ATM cells received from the ATM network into a second packet and for transferring the second packet to the first LAN;an ATM switch disposed in the ATM network, for transferring the ATM cells to a predetermined path in accordance with a VPI and a VCI of the ATM cells, for detecting a state of congestion and for sending an RM cell to the gateway unit, the RM cell including information concerning the detected congestion; anda transmitting terminal disposed in the first LAN, for communicating with a receiving terminal in a second LAN via the ATM network by the first packet including a TCP data gram,wherein the gateway unitadjusts, by a read from an output buffer, a cell output rate to a VC congested in accordance with a cell rate written in the RM cell received when the congestion is detected from the RM cell;sends a pseudo ACK packet to the transmitting terminal so as to stop the transmission of the TCP data gram received from the first LAN to the congested VC, the ACK packet indicating that the receiving terminal cannot receive the data; anddiscards all the packets passing through the congested VC transmitted from the transmitting terminal during the detection of congestion.