{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9609688","patent":{"patent_number":"US-9609688","title":"Methods and apparatus to facilitate relay startup and radio link failure (RLF) handling","assignee":null,"inventors":[],"filing_date":"2011-04-04T00:00:00.000Z","publication_date":"2017-03-28T00:00:00.000Z","cpc_codes":["H04W","H04B","H04W"],"num_claims":40,"abstract":"Certain aspects of the present disclosure provide techniques and apparatus for startup and recovery of a radio link between a relay node and a donor base station. According to certain aspects, a relay node may perform a random access procedure utilizing a random access channel (RACH) to transition between Uu interface operations and Un interface operations. According to certain aspects, the relay node may perform radio link failure (RLF) recovery utilizing RACH procedures for a Un interface. The procedures described herein, according to certain aspects, may utilize a dedicated relay RACH resource and a Relay Physical Downlink Control Channel (R-PDCCH)."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Methods and apparatus to facilitate relay startup and radio link failure (RLF) handling","description":"Certain aspects of the present disclosure provide techniques and apparatus for startup and recovery of a radio link between a relay node and a donor base station. According to certain aspects, a relay","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9609688","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-9609688","citation_suggestion":"Patentable. \"Methods and apparatus to facilitate relay startup and radio link failure (RLF) handling\" (US-9609688). https://patentable.app/patents/US-9609688","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9609688","json":"https://patentable.app/api/llm-context/US-9609688","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T09:50:50.460Z"}