Patent ID: 9191142
Filing Date: 2015-11-17
Classification: H04B,H04J

Abstract:
1. An optical network unit (ONU) having a power saving function, comprising: a first signal transmitter-receiver unit configured to transmit and receive a signal to and from an optical line terminal (OLT); a second signal transmitter-receiver unit configured to transmit and receive a signal to and from customer premises equipment (CPE) through a plurality of communication ports; a signal processing unit configured to control a signal to be transmitted and received through the first signal transmitter-receiver unit and the second signal transmitter-receiver unit; and a processor configured to control powers of the first signal transmitter-receiver unit and the signal processing unit according to whether data traffic is received through the plurality of communication ports; wherein the processor performs an analysis of each of communication port-specific alarm signals indicating an absence of traffic for a preset time and respectively corresponding to the plurality of communication ports, and operates a sleep mode of the ONU in a full sleep mode if the analysis indicates that all of the plurality of communication ports have output the communication port-specific alarm signal, or a operates a partial sleep mode of the ONU if the analysis indicates that fewer than all of the plurality of communication ports have output the communication port-specific alarm signal.