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:
Dec. 09, 2025
Filed:
Nov. 20, 2023
Ciena Corporation, Hanover, MD (US);
Edward Wayne Boyd, Gilbert, AZ (US);
James A. Teborek, Mansfield, MA (US);
Jean-Christophe Marion, Petaluma, CA (US);
Mark Edward Laubach, Santa Clara, CA (US);
Ciena Corporation, Hanover, MD (US);
Abstract
Rangeless failover in Passive Optical Network (PON) protection switching is implemented by an Optical Line Terminal (OLT) that includes a transmitter configured to connect a plurality of Optical Network Units (ONUs) on a downstream channel; a receiver configured to connect the plurality of ONUs on an upstream channel; and circuitry communicatively coupled to the transmitter and the receiver, wherein the circuitry is configured to, responsive to protection switch from a primary OLT, enable the transmitter on the downstream channel, and utilize a Dynamic Bandwidth Assignment (DBA) function on the downstream channel with a guard time that includes a normal guard time plus a differential time added thereto. The guard time is larger than a guard time used by the primary OLT prior to the protection switch. The differential time can be based on a differential between a closest ONU and farthest ONU, relative to the primary OLT, prior to the protection switch.