{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-11272548","patent":{"patent_number":"US-11272548","title":"Method and apparatus for switching between 2 step and 4 step random access (RA) procedures and contention resolutions","assignee":null,"inventors":[],"filing_date":"2020-04-24T00:00:00.000Z","publication_date":"2022-03-08T00:00:00.000Z","cpc_codes":["H04W","H04L","H04L","H04L","H04L","H04L","H04W","H04W","H04W","H04W","H04W","H04L","H04W","H04W"],"num_claims":14,"abstract":"A communication method and system for converging a 5th generation (5G) communication system for supporting higher data rates beyond a 4th generation (4G) system with a technology for Internet of things (IoT) are provided. The communication method and system may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. A method for performing a random access (RA) procedure is provided. The method comprises transmitting a first message of a 2 step RA procedure including an RA preamble and a cell-radio network temporary identifier (C-RNTI), receiving a second message of the 2 step RA procedure on a physical downlink control channel (PDCCH) addressed to the C-RNTI, identifying whether a time alignment timer (TAT) is running or not, and determining that the 2 step RA procedure is completed successfully in case that the TAT is running and the PDCCH schedules an uplink (UL) transport block (TB) for a new transmission."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Method and apparatus for switching between 2 step and 4 step random access (RA) procedures and contention resolutions","description":"A communication method and system for converging a 5th generation (5G) communication system for supporting higher data rates beyond a 4th generation (4G) system with a technology for Internet of thing","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-11272548","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-11272548","citation_suggestion":"Patentable. \"Method and apparatus for switching between 2 step and 4 step random access (RA) procedures and contention resolutions\" (US-11272548). https://patentable.app/patents/US-11272548","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-11272548","json":"https://patentable.app/api/llm-context/US-11272548","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T15:32:43.829Z"}