{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9831977","patent":{"patent_number":"US-9831977","title":"Photonic routing systems and methods computing loop-free topologies","assignee":null,"inventors":[],"filing_date":"2016-10-27T00:00:00.000Z","publication_date":"2017-11-28T00:00:00.000Z","cpc_codes":["H04J","H04B","H04J","H04J","H04J","H04J","H04J","H04L","H04L","H04L","H04L","H04L","H04Q","H04Q","H04J","H04J","H04J","H04J","H04J","H04J","H04L","H04Q","H04Q","H04Q","H04Q"],"num_claims":20,"abstract":"Systems and methods for routing wavelengths in an optical network include responsive to a path request for a wavelength or group of wavelengths, determining a path through the optical network; determining a location on the path where wavelength blocking should occur to form a loop-free path in the optical network; and setting the wavelength blocking at the location. The optical network can utilize a broadcast and select architecture and the wavelength blocking is configured to prevent the wavelength or group of wavelengths from looping back on a port where the wavelength or group of wavelengths has already been received on. The optical network can utilize an all-broadcast architecture and the wavelength blocking is configured to prevent multiple paths for the wavelength or group of wavelengths by constraining the wavelength or group of wavelengths to a single path through the optical network."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Photonic routing systems and methods computing loop-free topologies","description":"Systems and methods for routing wavelengths in an optical network include responsive to a path request for a wavelength or group of wavelengths, determining a path through the optical network; determi","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9831977","license":"CC-BY-4.0-like","license_terms":"AI-generated analysis on this page (summary, layman_explanation, technical_analysis, business_analysis, faqs) may be reused with attribution and a visible link back to the canonical URL above. Patent abstracts, claims, and bibliographic data are USPTO public domain.","required_link":"https://patentable.app/patents/US-9831977","citation_suggestion":"Patentable. \"Photonic routing systems and methods computing loop-free topologies\" (US-9831977). https://patentable.app/patents/US-9831977","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9831977","json":"https://patentable.app/api/llm-context/US-9831977","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T11:20:01.880Z"}