A propagation delay compensator and a cell transmission control method for controlling a transmission rate of an asynchronous transfer mode (ATM) terminal

摘要

The present invention relates to a propagation delay compensator and a cell transmission control method for controlling a transmission rate of an asynchronous transfer mode (ATM) terminal. The VPI register 13, the cell transmission buffer 15, the credit counter 17, (16) and a cell transmission control means (18). The cell transmission controller (18) operates when the cell synchronous clock is synchronized, and when a cell synchronous clock occurs, A first step of checking whether there is a cell to transmit; And a second step of decreasing the credit counter (17) by transmitting a cell only when the value of the credit counter (17) is greater than 0 and transmitting the cell when there is a cell to be transmitted. (Rate control) to reduce the cell loss to a minimum. It precisely measures the state of the buffer in the ATM hub to prevent the buffer from overflowing in advance. Thus eliminating cell loss due to buffer overflow in the ATM hub.