Optical network unit for Low latency packet transmission in time division multiplexing passive optical network, Method of operating thereof, and Apparatus for controlling optical network unit

The ONU, its operation method and an ONU control device for a low-delay transmission of packets from the TDM-PON is disclosed. Method of operation of ONU for low delay packet transmission in a TDM-PON, according to one aspect, the receiving step and, receiving a first time slot assignment information about a band allocated to the base station by the terminal for upstream transmission of a packet from the base station the second may comprise transmitting to the OLT for bandwidth allocation request based on the first slot assignment information before completing the packet received from the base station.