Optical network unit activation
AssigneeNokia Solutions and Networks Oy
InventorsPaul Henri Marie Cautereels, Carl Julien Godelieve Mertens, Michael Fivez, Rene Bonk
Life of this patent
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Abstract
The present disclosure relates to an optical line terminal, OLT, which is enabled to range optical network units, ONUs, in a point-to-multipoint optical network by detecting interference burst sequences transmitted by one or more joining ONUs during transmission of upstream data traffic from transmitting ONUs. The present disclosure further relates to an optical network unit, ONU, which is enabled to transmit, at a selected transmission time, an interference burst sequence including a sequence of pulses allowing the OLT to identify the ONU as a joining ONU.
Claims15
An optical line terminal, OLT, configured to communicate in a point-to-multipoint optical network with optical network units, ONUs, where upstream traffic from one or more transmitting ONUs to the OLT is organized in frames comprising codewords, the OLT comprising at least one processor and at least one memory including computer program code, the at least one memory and computer program code configured to, with the at least one processor, cause the OLT to perform:
- detecting, in the upstream traffic, a sequence of interference bursts transmitted by an ONU, the sequence of interference bursts comprising a sequence of pulses that induce errors distributed over the codewords;
- identifying the ONU as a joining ONU based on the sequence of interference bursts;
- allocating an upstream transmission timeslot in one or more subsequent frames for the joining ONU;
- determining timing information for enabling a subsequent transmission from the joining ONU to be received within the allocated upstream transmission timeslot based on a time of reception of the sequence of interference bursts and the allocated upstream transmission timeslot;
- and
- transmitting the timing information to the joining ONU.
An optical network unit, ONU, configured to communicate in a point-to-multipoint optical network with an optical line terminal, OLT, where upstream traffic from one or more transmitting ONUs to the OLT is organized in frames comprising codewords, the ONU comprising at least one processor and at least one memory including computer program code, the at least one memory and computer program code configured to, with the at least one processor, cause the ONU to perform:
- transmitting a sequence of interference bursts to the OLT at a selected time of transmission relative to a reference time point, the sequence of interference bursts comprising a sequence of pulses that induce errors distributed over the codewords, and allow the OLT to identify the ONU as a joining ONU based on the sequence of interference bursts;
- receiving, from the OLT, timing information;
- and
- determining a time of a subsequent transmission, based upon the selected time of transmission and the received timing information, such that the subsequent transmission from the ONU to be received by the OLT within an allocated upstream transmission timeslot is enabled.
A method,
- by an OLT configured to communicate in a point-to-multipoint optical network with ONUs where upstream traffic from one or more transmitting ONUs to the OLT is organized in frames comprising codewords, comprising:
- detecting, in the upstream traffic, a sequence of interference bursts transmitted by an ONU, the sequence of interference bursts comprising a sequence of pulses that induce errors distributed over the codewords;
- identifying the ONU as a joining ONU based on the sequence of interference bursts;
- allocating an upstream transmission timeslot in the frames for the joining ONU;
- determining timing information for enabling a subsequent transmission from the joining ONU to be received within the allocated upstream transmission timeslot based on a time of reception of the sequence of interference bursts and the allocated upstream transmission timeslot;
- and
- transmitting the timing information to the joining ONU.
A method, by an ONU configured to communicate in a point-to-multipoint optical network with an OLT where upstream traffic from one or more transmitting ONUs to the OLT is organized in upstream frames comprising codewords, comprising:
- transmitting, a sequence of interference bursts to the OLT at a selected time of transmission relative to a reference time point, the sequence of interference bursts comprising a sequence of pulses that induce errors distributed over the codewords, and allow the OLT to identify the ONU as a joining ONU based on the sequence of interference bursts;
- receiving, from the OLT, timing information;
- and
- determining a time of a subsequent transmission, based upon the selected time of transmission and the received timing information, such that the subsequent transmission from the ONU to be received by the OLT within an allocated upstream transmission timeslot is enabled.
Dependencies are inferred from the claim text.