Method for filtering of abnormal ONT with same serial number in a GPON system

摘要

Disclosed is a method of registering only an authorized optical network terminal among a plurality of optical network terminals with the same serial number, in an optical line terminal, using a public key encryption algorithm, in a Gigabit Passive Optical Network (GPON). According to an exemplary aspect, a GPON system encrypts a physical layer OAM message transmitted/received for serial number registration of an optical network terminal, using a key distributed according to a public key encryption algorithm, and authenticates registration of the optical network terminal using the encrypted physical layer OAM message. Accordingly, it is possible to securely authenticate registration of an authorized optical network terminal and block registration of unauthorized optical network terminals.

主权项

1. A method in which an optical network terminal obtains a registration approval from an optical line terminal in a Gigabit passive optical network (GPON), comprising:
at the optical network terminal, being assigned an optical line terminal (OLT) public key, by the optical line terminal, when the optical network terminal joins the GPON, the OLT public key corresponding to an optical line terminal (OLT) private key assigned to the optical line terminal; and at the optical network terminal, encrypting a header of a frame associated with registration of the optical network terminal, the header including a physical layer Operations, Administration and Maintenance (OAM) message, using the OLT public key, and obtaining the registration approval from the optical line terminal using the frame with the encrypted header; wherein the obtaining of the registration approval comprises: encrypting a physical layer OAM message included in a header of a frame associated with registration of a serial number of the optical network terminal using the OLT public key, transmitting the encrypted physical layer OAM message to the optical line terminal and obtaining registration for the serial number from the optical line terminal; and at the optical network terminal, generating an optical network terminal (ONT) public key and an ONT private key in response to the obtaining registration for the serial number and transmitting the ONT public key to the optical line terminal.