MEDIUM ACCESS CONTROL METHOD OF A PASSIVE OPTICAL NETWORK AND A SYSTEM THEREOF, CONCERNED WITH PREDICTING A MAXIMUM POLLING PERIOD OF AN EXISTING SUBSCRIBER AND PREVENTING A LONG STANDBY TIME OF NEW POLLING REGISTERS

摘要

PURPOSE: An MAC method of a PON(Passive Optical Network) and a system thereof are provided to set a threshold value to prevent a service quality deterioration caused by a bandwidth monopoly, thereby predicting a maximum polling period of an existing subscriber and preventing a long standby time of new polling registers. CONSTITUTION: Each ONT(Optical Network Termination) waits for a registration request frame(S401), transmits a polling group subscription frame to an OLT(Optical Line Terminator), and registers in a polling table(S402). Each ONT receives a frame from the OLT to compare the frame with a destination address, and abandons the frame if the frame does not have the identical address(S403-S405). If a self MAC address is identical with the destination address, each ONT checks a frame type(S406). If the received frame is a control frame, the ONT confirms whether the frame is a polling frame(S408). If so, the ONT first confirms whether a polling group secession request is received from the upper layer(S409). If so, the procedure is completed.