COMMON BUFFER SWITCH

摘要

PROBLEM TO BE SOLVED: To attain traffic control with a high efficiency without remarkable increase in number of cell buffer address pointer FIFO sets. SOLUTION: A common buffer control section 8 acquires a cell buffer address FIFO number to be in use, acquires an address at which a cell is stored in a common buffer 4 from an idle address FIFO 10, a header and a payload of the cell transferred to the common buffer 4 are written in the common buffer 4 and an address acquired from the idle address FIFO 10 is queued in cell buffer address pointers FIFO 111 -11n corresponding to the address acquired from the idle address FIFO 10. A cell address stored in the cell buffer address pointers FIFO 111 -11n is read based on a cell output timing of the common buffer control section 8 and on the queued cell to read a cell stored in the common buffer 4 and the cell is outputted with higher priority as the class of higher level.