{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9681405","patent":{"patent_number":"US-9681405","title":"Method and apparatus for applying a time alignment timer in a wireless communication system using a carrier aggregation technique","assignee":null,"inventors":[],"filing_date":"2012-05-10T00:00:00.000Z","publication_date":"2017-06-13T00:00:00.000Z","cpc_codes":["H04W","H04L","H04L","H04W","H04W","H04W","H04W","H04W","H04W","H04W","H04W"],"num_claims":14,"abstract":"Operation of a terminal for determining which time alignment timer is applied to a certain condition when specific timers operate for each carrier-wave group in the event a wireless communication system using carrier aggregation techniques. A terminal performs communication without malfunctions using a timer suitable for a certain condition. The terminal operates the timer by receiving, from a base station, a message including a timing advance command and an index on a timing advance group (TAG), operating the timer for the TAG, the index has a value of 00 when the TAG includes a first cell. A terminal operates a timer by operating a first timer for a TAG including a first cell, operating a second timer upon receipt of a timing advance command for a second TAG that does not include the first cell, and, if the first timer has expired, deeming the second timer to also be expired."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Method and apparatus for applying a time alignment timer in a wireless communication system using a carrier aggregation technique","description":"Operation of a terminal for determining which time alignment timer is applied to a certain condition when specific timers operate for each carrier-wave group in the event a wireless communication syst","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9681405","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-9681405","citation_suggestion":"Patentable. \"Method and apparatus for applying a time alignment timer in a wireless communication system using a carrier aggregation technique\" (US-9681405). https://patentable.app/patents/US-9681405","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9681405","json":"https://patentable.app/api/llm-context/US-9681405","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T12:37:31.906Z"}