Method and apparatus for authentication in passive optical network

An optical line terminal (OLT) comprising:

• a first receiver, configured to receive a first terminal serial number of an ONU;
• the first receiver, configured to receive a first logic registration code of the ONU, when the first terminal serial number does not match the second terminal serial number;
• and
• a recorder, configured to record the first terminal serial number when the first logic registration code matches the second logic registration code.

A method performed on an optical network unit (ONU), the method comprising:

• transmitting, by the ONU, a first terminal serial number of the ONU to an optical line terminal (OLT) when the ONU logs on;
• receiving, by the ONU, a request for a logic registration code from the OLT, when the central office determines that the first terminal serial number does not match a second terminal serial number;
• and
• in response to the request, transmitting, by the ONU, a first logic registration code to the OLT for authentication;
• receiving, by the ONU, a ONU identifier (ONU-ID), when the first logic registration code matches the second logic registration code.

An optical network unit (ONU) comprising:

• a memory, configured to store a terminal serial number and a logic registration code;
• a transmitter, configured to transmit a first terminal serial number to an optical line terminal (OLT) when the ONU logs on;
• and
• a second receiver, configured to receive a request for a logic registration code from the OLT, when the OLT determines that the first terminal serial number does not match a second terminal serial number stored on the OLT;
• wherein the transmitter is further configured to transmit a logic registration code to the OLT in response to the request for logical registration code;
• and
• wherein the second receiver is further configured to receive a ONU identifier (ONU-ID), when the first logic registration code matches the second logic registration code stored on the OLT.