Patent ID: 7953324
Filing Date: 2011-05-31
Classification: H04L

Abstract:
1. A method for providing upstream data synchronization in an optical communication network, the method comprising: sending data from an Optical Network Unit comprising a transmitter, the data comprising a first data frame, the first data frame comprising a header sequence, a synchronization segment, and a data segment, the synchronization segment including 66 bits, the 66 bits including a first number of bits having nonzero values, and a second number of bits having a value of zero, the first number being different from the second number; receiving at least the first data frame by a receiver of an Optical Line Terminal; storing the first data frame by a shifter register of the Optical Line Terminal; comparing a first segment of the first data frame with a synchronization delimiter by a logic circuit of the Optical Line Terminal; determining a Hamming distance based on the first segment of the first data frame by a Hamming distance module of the Optical Line Terminal; and determining a boundary of the first data frame by a delineation decision module of the Optical Line terminal.