A method for controlling traffic priority in ATM switching system and traffic managing buffer thereof

摘要

PURPOSE: A method for controlling a priority of a traffic in an ATM switching system and a traffic managing buffer using the same are provided to enhance an efficiency in using a buffer and performance of a network by improving a throughput of the buffer even for a cell with a low priority. CONSTITUTION: A main buffer(310) simultaneously receives a real time service cell and a non-real time service cell. Auxiliary buffers(S-1)(320)(S-2)(330) store a cell service 3, a non-real time service cell, and a cell service 4 transmitted according to a threshold values of the main buffer(310) and the auxiliary buffer(S-1)(320) and a threshold value of the auxiliary buffer(S-2)(330). A server(340) provides cell service. When the main buffer(310) is greater than an M-threshold value, a cell of a real time service of the main buffer(313) is discharged. If a non-real time cell of the main buffer has a high LP(Loss Priority), it is transmitted to the auxiliary buffer(S-1)(320), whereas if a non-real time cell has a low LP, it is transmitted to the auxiliary buffer(S-2)(330). The auxiliary buffer does not discharge a cell. If the main buffer(310) is smaller than the M-threshold value, a priority of a cell in a standby state for discharging in the main buffer(310) and a priority of a cell in a standby state for discharging in the auxiliary buffers(S-1)(320)(S-2)(330) are compared, and a cell of the auxiliary buffer(S-1)(320) and the auxiliary buffer(S-2)(330) is selectively provided.