The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 22, 2025
Filed:
Dec. 30, 2022
Cortina Access, Inc., San Jose, CA (US);
Charles Chen, San Jose, CA (US);
REALTEK SINGAPORE PRIVATE LIMITED, Singapore, SG;
Abstract
A passive optical network (PON) includes at least one optical network unit (ONU) at a downstream end and an optical line terminal (OLT) at an upstream end. Each ONU is dynamically allocated with an upstream communication window. During a laser always on (LAO) detection process, when the OLT receives an optical signal from the downstream end within an upstream idle window, the OLT determines that an LAO problem exists. The upstream idle window does not overlap with any upstream communication window. An anomaly detection method for the PON includes: during the LAO detection process, when the OLT receives an optical signal from the downstream end within the upstream idle window, determining, by the OLT, the LAO problem exists. An OLT includes an optical transceiver unit that optically communicates with the downstream end and output a receiving state signal and a control unit that determines whether the LAO problem exists.