Patent ID: 8625990
Filing Date: 2014-01-07
Classification: H04J

Abstract:
1. An optical transmission method, wherein M light sources on an optical line terminal (OLT) provide K carriers for N optical network units (ONUs), M, N, and K are integers greater than 1, and K>M>=N, comprising: separately performing power splitting on a part or all of M optical signals which have different wavelengths and are generated by the M light sources, to form a first group of optical signals comprising first split optical signals and a second group of optical signals comprising second split optical signals, wherein the first group of optical signals and the second group of optical signals both have N different wavelengths; performing cross routing on the first group of optical signals and the second group of optical signals to form N carrier groups of signals that need to be provided to the N ONUs, wherein the N carrier groups of signals have K carriers in total, each carrier group of signals comprise a carrier in the first group of optical signals and a carrier in the second group of optical signals, and carriers in each carrier group of signals have different wavelengths; wherein the first group of optical signals are used as downstream carriers and the second group of optical signals are used as upstream carriers, and the method further comprises: wherein performing cross routing on the first group of optical signals and the second group of optical signals to form N carrier groups of signals that need to be provided to N ONUs comprises: