An optical line terminal (OLT) comprises a target OLT channel termination (CT), and a source OLT CT in communication with the target OLT CT, wherein the source OLT CT is configured to exchange tuning messages with the target OLT CT to initiate upstream wavelength tuning of an optical network unit (ONU), wherein the source OLT CT is configured to transmit a tuning request to the ONU after the tuning messages have been exchanged and to receive a tuning acknowledgement message from the ONU indicating that the tuning request will be executed, wherein the source OLT CT is configured to transmit a broadcast notification message to all OLT CTs within the OLT, except for the source OLT CT, after receipt of the tuning acknowledge message from the ONU, and wherein the broadcast notification message includes a tuning time of the ONU.

An optical line terminal (OLT) comprises a target OLT channel termination (CT), and a source OLT CT in communication with the target OLT CT, wherein the source OLT CT is configured to exchange tuning messages with the target OLT CT to initiate upstream wavelength tuning of an optical network unit (ONU), wherein the source OLT CT is configured to transmit a tuning request to the ONU after the tuning messages have been exchanged and to receive a tuning acknowledgement message from the ONU indicating that the tuning request will be executed, wherein the source OLT CT is configured to transmit a broadcast notification message to all OLT CTs within the OLT, except for the source OLT CT, after receipt of the tuning acknowledge message from the ONU, and wherein the broadcast notification message includes a tuning time of the ONU.

One embodiment provides an apparatus for coupling between a trunk passive optical network (PON) and a leaf PON. The apparatus includes a trunk-side optical transceiver coupled to the trunk PON, a leaf-side optical transceiver coupled to the leaf PON, and an integrated circuit chip that includes an optical network unit (ONU) media access control (MAC) module, an optical line terminal (OLT) MAC module, and an on-chip memory.

A computerized system and method for managing a passive optical network (PON) is disclosed. The system includes a detection and analysis module adapted for receiving uploaded measurement data from an optical line terminal (OLT) and at least one optical network terminal (ONT), and at least one of technical tools data, service failure data, and outside plant data. The detection and analysis module is adapted for determining a source of failure or potential failure in the PON by correlating the uploaded measurement data and the at least one of technical tools data and service failure data with information stored in a memory medium for the OLT and each ONT.

A remote node device for mutual communication between optical network units in a passive optical network includes an NN-arrayed waveguide grating configured to receive upstream optical signal of one of the optical network units and to output this signal as a first optical signal; a 12 wavelength division multiplexer configured to separate per band the first optical signal to obtain a second optical signal; and a 1(N1) power distributor configured to transmit the second optical signal to the corresponding optical network unit through the NN-arrayed waveguide grating.

The present invention is an optical terminal device comprising a signal modulator configured to generate a first signal modulated onto a first optical sideband of a first optical wavelength signal and a second signal modulated onto a second sideband of the first optical wavelength signal, the first signal being a different type than the second signal; a receiver configured to receive a third signal modulated onto the first optical sideband of a second optical wavelength signal and a fourth signal modulated onto a second sideband of the second optical wavelength signal, the third signal being a different type than the fourth signal; and a circulator coupled to the signal modulator and the receiver, wherein the circulator is configured to communicate with a node of an integrated network via an optical fiber. A remote node, a communication terminal, and a method of performing integrated network access are also disclosed.

A bit allocation method is used in an optical transmission system that transmits multicarrier signals of different wavelengths in wavelength division multiplexing. Frequency characteristics of subcarriers included in the multicarrier signals are different between the respective multicarrier signals. The method includes: measuring transmission characteristics of the subcarriers included in corresponding multicarrier signals at different subcarrier frequencies; and determining a number of bits to be allocated to each of the subcarriers included in each of the multicarrier signals based on the transmission characteristics measured at the different subcarrier frequencies.

One embodiment provides an apparatus for coupling between a trunk passive optical network (PON) and a leaf PON. The apparatus includes a trunk-side optical transceiver coupled to the trunk PON, a leaf-side optical transceiver coupled to the leaf PON, and an integrated circuit chip that includes an optical network unit (ONU) media access control (MAC) module, an optical line terminal (OLT) MAC module, and an on-chip memory.

A computerized system and method for managing a passive optical network (PON) is disclosed. The system includes a detection and analysis module adapted for receiving uploaded measurement data from an optical line terminal (OLT) and at least one optical network terminal (ONT), and at least one of technical tools data, service failure data, and outside plant data. The detection and analysis module is adapted for determining a source of failure or potential failure in the PON by correlating the uploaded measurement data and the at least one of technical tools data and service failure data with information stored in a memory medium for the OLT and each ONT.

An optical network unit, ONU, is configured to receive a stream of forward error correction, FEC, codewords comprising at least a portion of respective downstream frames broadcasted by the OLT over the PON, the respective downstream frames including a header and a payload, the header including one or more error correction bits for error correcting the header by the ONU, and an identifier indicative for which of the one or more ONUs the payload is intended; wherein the ONU is configured to perform first, error correcting the headers of the downstream frames based on the one or more error correction bits within the respective headers; then, identifying downstream frames with a payload intended for the ONU based on the identifier within the error-corrected headers; and thereafter, FEC decoding the one or more FEC codewords that comprise at least a portion of the identified downstream frames.