| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an ATM switch which quickly distributes buffering action, maximizes fast transmission of time critical data and minimizes transmission loss in a back pressure system. SOLUTION: An input port 23 transmits a cell from an input buffer in response to plural priority levels. Each output port 23 has an output buffer that retains a cell when the cell arrives from the input port faster than that the output port transmits it. The output port also transmits a cell from the output buffer in response to plural priority levels. A back pressure signal circuit sends a signal from the congested output buffer to the input buffer that just transmits a cell to the output buffer through a switch structure 10, and stops the transmission of the input port buffer. An ATM switch drops a cell based on previously connected reference more than a cell priority level. A penalty is imposed on a sender who makes congestion cause data more, than other users of the ATM switch.</p> |
