Bus-based optical network system

A bus-based optical network system comprising:

• optical fibers forming a transmitting bus and a receiving bus using time-division multiple access (TDMA) method;
• the transmitting bus defining an upstream channel and the receiving bus defining a downstream channel;
• optical line terminals including a near part of an optical line terminal (OLTN) and a far part of an optical line terminal (OLTF);
• said optical line terminals configured for transmitting and receiving TDMA messages;
• the OLTN being arranged in or near a central office (CO), and the OLTF terminating said optical fibers at a position far from the CO;
• each of said OLTN and said OLTF including a TDMA slot generator and a TDMA slot terminator;
• a medium access control protocol (MAC) of the OLTN includes a traffic control function;
• the position far from the CO is another central office or a position that is reached by optical fibers outside the central office of the bus-based optical fibers;
• and
• a plurality of optical network units (ONUs) each connected with the transmitting bus and the receiving bus, said plurality of optical network units being used as an interface between the bus-based optical network system and private networks;
• the medium access control (MAC) protocol of each ONU providing and performing traffic control functions solely within each of said plurality of ONUs independent of said optical line terminals when the ONU sends data segments onto the transmitting bus.