{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9839046","patent":{"patent_number":"US-9839046","title":"Method and apparatus for accessing an uplink random access channel in a singular carrier frequency division multiple access system","assignee":null,"inventors":[],"filing_date":"2016-02-16T00:00:00.000Z","publication_date":"2017-12-05T00:00:00.000Z","cpc_codes":["H04L","H04L","H04L","H04W","H04W","H04W","H04W","H04W","H04W","H04W","H04W","H04L","H04L","H04L","H04W","H04W","H04W","H04W","H04W","H04W","H04W"],"num_claims":14,"abstract":"A method and apparatus for accessing a contention-based uplink random access channel (RACH) in a single carrier frequency division multiple access (SC-FDMA) system are disclosed. A wireless transmit/receive unit (WTRU) randomly selects a RACH subchannel and a signature among a plurality of available RACH subchannels and signatures. The WTRU transmits a preamble using the selected signature via the selected RACH subchannel at a predetermined or computed transmission power. A base station monitors the RACH to detect the preamble and sends an acquisition indicator (AI) to the WTRU when a signature is detected on the RACH. When receiving a positive acknowledgement, the WTRU sends a message part to the base station. If receiving a negative acknowledgement or no response, the WTRU retransmits the preamble."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Method and apparatus for accessing an uplink random access channel in a singular carrier frequency division multiple access system","description":"A method and apparatus for accessing a contention-based uplink random access channel (RACH) in a single carrier frequency division multiple access (SC-FDMA) system are disclosed. A wireless transmit/r","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9839046","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-9839046","citation_suggestion":"Patentable. \"Method and apparatus for accessing an uplink random access channel in a singular carrier frequency division multiple access system\" (US-9839046). https://patentable.app/patents/US-9839046","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9839046","json":"https://patentable.app/api/llm-context/US-9839046","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T07:48:13.078Z"}