Patent ID: 8548329

Claim:
A method of relaying an optical signal in a hybrid relaying apparatus of a gigabit passive optical network (GPON), comprising: receiving any one of a first downlink electrical signal corresponding to a downlink wavelength division multiplexing-passive optical network (WDM-PON) optical line terminal (OLT) optical signal or a second downlink electrical signal corresponding to a downlink GPON OLT optical signal; modulating the received downlink electrical signal to a downlink GPON transmission convergence (GTC) frame; extracting control information for uplink transmission from the downlink GTC frame; converting the downlink GTC frame into the downlink electrical signal; converting the converted downlink electrical signal into an optical signal in a GPON OLT optical transceiver; and transmitting the converted optical signal to a GPON optical network unit (ONU); wherein the receiving the any one of the first downlink electrical signal or the second downlink electrical signal comprises: receiving the downlink WDM-PON OLT optical signal and converting it into the first downlink electrical signal; receiving the downlink GPON OLT optical signal and converting it into the second downlink electrical signal; and selecting one of the first downlink electrical signal or the second downlink electrical signal depending on a relaying mode.