{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9729297","patent":{"patent_number":"US-9729297","title":"Method and apparatus for performing HARQ in carrier aggregation system","assignee":null,"inventors":[],"filing_date":"2014-01-08T00:00:00.000Z","publication_date":"2017-08-08T00:00:00.000Z","cpc_codes":["H04L","H04L","H04L","H04L","H04L","H04W","H04L"],"num_claims":6,"abstract":"Provided are an apparatus and a method for executing an uplink hybrid automatic repeat request (HARQ) in a carrier aggregation system. The method transmits data to a base station from an uplink subframe of a second cell, and receives, from the base station, an acknowledgement/not-acknowledgement (ACK/NACK) or scheduling information for the data from a downlink subframe of a first cell, wherein if the timing relationship between the uplink subframe of the second cell and the downlink subframe of the first cell does not match the timing relationship for when the first cell is being used exclusively, then the scheduling information is received from the downlink subframe of the first cell."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Method and apparatus for performing HARQ in carrier aggregation system","description":"Provided are an apparatus and a method for executing an uplink hybrid automatic repeat request (HARQ) in a carrier aggregation system. The method transmits data to a base station from an uplink subfra","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9729297","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-9729297","citation_suggestion":"Patentable. \"Method and apparatus for performing HARQ in carrier aggregation system\" (US-9729297). https://patentable.app/patents/US-9729297","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9729297","json":"https://patentable.app/api/llm-context/US-9729297","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T08:48:47.839Z"}