{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9736684","patent":{"patent_number":"US-9736684","title":"Mechanisms for detection of and recovery from ciphering parameter mismatch on communication networks","assignee":null,"inventors":[],"filing_date":"2011-06-01T00:00:00.000Z","publication_date":"2017-08-15T00:00:00.000Z","cpc_codes":["H04W","H04L","H04W","H04L","H04L","H04L","H04W"],"num_claims":28,"abstract":"Disclosed are methods and apparatus for detecting mismatch of ciphering parameters, such as Count-C, in a wireless device and recovery therefrom. The methods and apparatus for detection include examining a predefined ciphered field, such as a Length Indicator field, in one or more received Radio Link Control (RLC) Protocol Data Units (PDUs). Next, a determination of when the field is invalid over a predetermined sample number of PDUs is performed. Mismatch of ciphering parameters can then be determined when a predetermined number of samples of the field detected as invalid exceed a predetermined threshold. Additionally, recovery of PDUs after mismatch detections is disclosed using a range of Hyper-Frame Numbers (HFNs) to decipher buffered PDUs, and then check which of the HFNs eliminate the parameter mismatch by again determining if parameter mismatch occurs using the methods and apparatus for detection."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Mechanisms for detection of and recovery from ciphering parameter mismatch on communication networks","description":"Disclosed are methods and apparatus for detecting mismatch of ciphering parameters, such as Count-C, in a wireless device and recovery therefrom. The methods and apparatus for detection include examin","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9736684","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-9736684","citation_suggestion":"Patentable. \"Mechanisms for detection of and recovery from ciphering parameter mismatch on communication networks\" (US-9736684). https://patentable.app/patents/US-9736684","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9736684","json":"https://patentable.app/api/llm-context/US-9736684","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T07:59:45.707Z"}