Patent ID: 8103171
Filing Date: 2012-01-24
Classification: H04B,H04J,H04Q

Abstract:
1. A method for data transfer in an optical network, comprising: receiving, at a user terminal, a downstream optical signal from a central office, the downstream optical signal being amplitude modulated with downstream data at a first rate; obtaining, at the user terminal, the downstream data from a first part of the received downstream optical signal; amplitude modulating, at the user terminal, upstream data to a second part of the received downstream optical signal with a second rate to generate an upstream optical signal, and sending the upstream optical signal to the central office, wherein a ratio of the first rate to the second rate is greater than 1; and sending the upstream optical signal from the user terminal to the central office so that the central office receives the upstream optical signal, and obtains the upstream data from the upstream optical signal.