H - Electricity – 04 – L
Patent
H - Electricity
04
L
H04L 12/20 (2006.01) H04L 12/28 (2006.01) H04L 12/44 (2006.01) H04L 12/50 (2006.01) H04L 29/02 (2006.01)
Patent
CA 2311888
Disclosed is a device of automatically controlling a data transmission rate for preventing a generation of an overflow in an Ethernet switch having a pair of ports each supporting a variety of transmission rates, comprising: one or more line interface logic circuits coupled to an external terminal unit, through one of the pair of ports, adapted to automatically set a transmission rate of the external terminal unit coupled to one of the pair of ports to a predetermined one of the transmission rates supported by the Ethernet switch, and adapted to interface data transmitted between the external terminal unit and the Ethernet switch; a line transmission rate controller coupled to the one or more line interface logic circuits, adapted to generate a control signal for reducing the transmission rate of data inputted to the Ethernet switch from the external terminal unit for application to the line interface logic circuit upon generation of an overflow within the Ethernet switch due to congestion of the inputted data, the transmission rate of the inputted data being reduced in such a fashion that it corresponds to a transmission rate at which the data is outputted from the Ethernet switch; and a buffer memory coupled to the line transmission rate controller, adapted to temporarily store data transmitted through the line interface logic circuit therein depending on the control of the line transmission rate controller. The Ethernet switch supporting a variety of transmission rates of the present invention provides advantages that the transmission rate of the input port is automatically controlled to correspond to that of the output port, thereby preventing loss of data due to generation of an overflow over a data transmission path, and reduction of data throughput in an entire communication network.
Joung Jin-Woo
Yoo Seung-Wha
Samsung Electronics Co. Ltd.
Smart & Biggar
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