CELL OUTPUT CONTROL CIRCUIT AND CONTROL METHOD

摘要

PROBLEM TO BE SOLVED: To output a cell at a rate close to an ACR by quantizing a value of LCR/ACR to be an integer through the assignment and transmission of a cell to a cell time slot so as to absorb a caused quantization error. SOLUTION: A cell time slot assignment section assigning a cell dynamically is made up of an ACR storage means 18-1 storing a calculated ACR(Allowed Cell Rate) 21, a cell output ate calculation means 18-3 calculating an output rate (LCR/ACR) of an ABR(Available Bit Rate) cell with respect to an LCR(Line Cell Rate), a quantization means 18-5 having each means of detecting, calculating, storage and absorption of a quantization error, a cell time slot counter 18-10, an output time slot calculation means 18-7, and a cell output time slot storage means 18-9. Through the constitution above, the time slot assignment of outputted cells is controlled dynamically and a cell is outputted at a rate close to the ACR suitable for the service of the ABR class.