Article Overview
Passive Optical Network (PON) technologies are widely patented, covering systems, devices, and methods for efficient fiber-optic broadband delivery and integration with advanced networking standards.
Overview of PON Patents
PON patents cover a range of technologies for delivering broadband access using fiber-optic networks with passive splitters to serve multiple endpoints from a single optical fiber. These patents often focus on Fiber-to-the-Home (FTTH) systems, optical line terminals (OLTs), optical network terminals (ONTs), and optical network units (ONUs) that manage upstream and downstream data transmission efficiently .
Key Patent Examples
- Daisy-Chaining in Optical LANs U.S. Patent Application US20150263810 describes a system where an ONT receives an optical signal from an OLT, splits it, and forwards a portion to another ONT, enabling daisy-chaining of devices in a local area network. This approach optimizes resource usage and reduces infrastructure costs .
- Time-Sensitive Networking Integration Patent WO/2025/137746 focuses on integrating PON components with Time-Sensitive Networking (TSN). It abstracts PON links to function as TSN bridges, implementing advanced time synchronization and traffic scheduling to ensure quality of service (QoS) for time-sensitive communications .
- Upstream Data Burst Management U.S. Patent Application 20250062851 describes a PON ONU with a transmitter subsystem that is enabled only during assigned timeslots for upstream data bursts. This method improves bandwidth allocation and reduces collisions in multi-user environments .
Applications and Innovations
- FTTH Multimedia Access: Patents cover systems that transport voice, video, and data signals over PONs, using optical multiplexing to combine multiple wavelengths for efficient delivery to subscriber home units .
- Optical Splitter and Transceiver Designs: Innovations include integrated optical splitters within ONTs and ONUs to manage signal distribution and forwarding efficiently .
- Network Management and QoS: Patents address dynamic configuration of network flows, centralized control, and integration with emerging standards to optimize performance in residential and enterprise networks .
- Commercial and Regulatory Optimization: Some patents focus on minimizing infrastructure costs and meeting strict regulatory requirements for network deployment .
Patent Resources
- PatSnap Eureka provides a searchable database for PON patents, prior art, and freedom-to-operate assessments .
- NEC Labs America maintains a portfolio of optical networking patents spanning backbone to home networks .
- PatentBuddy and Google Patents offer detailed patent applications and family data for PON technologies . These patents collectively demonstrate the breadth of innovation in PON systems, from hardware design to network management and integration with advanced networking protocols.
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