A method of preventing light load penalty in an ethernet passive optical network and an optical network unit using the same

摘要

The invention relates to a method of upstream data transmission in an Ethernet Passive Optical Network (EPON) which is capable of preventing Light Load Penalty (LLP) and an Optical Network Unit (ONU) using the same. The method comprises requesting a first upstream time-slot having a size corresponding to a sum of a first entire data size of a first number of packets stored in a first queue having a high priority and of a second entire data size of a second number of packets stored in the second queue having a low priority. The first number and the second number will be stored for later use during the first upstream time-slot when a number of packets stored in the first queue corresponding to the first number is sent upstream and a number of packets stored in the second queue corresponding to the second number is sent upstream.