Apparatuses, methods, and computer programs for a remote unit and a central unit of an optical line terminal

A higher-layer apparatus for an optical line terminal, the optical line terminal further comprising a plurality of lower-layer apparatuses in communication with the higher-layer apparatus via one or more communication links, the higher-layer apparatus comprising a processor configured to:

• receive a plurality of reports from the plurality of lower-layer apparatuses, wherein each report comprises a plurality of initial bandwidth assignments each for a plurality of users of one or more optical networks,
• determine a plurality of final bandwidth assignments based on:
• a review of the initial bandwidth assignments aggregated across the plurality of lower-layer apparatuses, and
• a transmission capacity of the one or more communication links;
• and
• transmit the final bandwidth assignments to the lower-layer apparatuses.

A method for lower-layer apparatus for an optical line terminal, the optical line terminal further comprising one or more further lower-layer apparatuses and a higher-layer apparatus, the lower-layer method comprising:

• obtaining a plurality of bandwidth requests from a plurality of users of one or more optical networks,
• calculating a plurality of initial bandwidth assignments based on the plurality of bandwidth requests,
• reporting the initial bandwidth assignments to the higher-layer apparatus, wherein the higher-layer apparatus determines a plurality of final bandwidth assignments by modifying the initial bandwidth assignments based on a review of a further plurality of initial bandwidth assignments calculated by the further one or more lower-layer apparatuses,
• receiving the final bandwidth assignments from the higher-layer apparatus, and
• transmitting the final bandwidth assignments to the plurality of optical network users.

A method for a higher-layer apparatus for an optical line terminal, the optical line terminal further comprising a plurality of lower-layer apparatuses in communication with the higher-layer apparatus via one or more communication links, the higher-layer method comprising:

• receiving a plurality of reports from the plurality of lower-layer apparatuses, wherein each report comprises a plurality of initial bandwidth assignments each for a plurality of users of the one or more optical networks,
• determining a plurality of final bandwidth assignments based on:
• a review of the initial bandwidth assignments aggregated across the plurality of lower-layer apparatuses, and
• a transmission capacity of the one or more communication links;
• and
• transmit the final bandwidth assignments to the lower-layer apparatuses.