{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-11503649","patent":{"patent_number":"US-11503649","title":"Uplink-initiated fast and low overhead initial access for MU MIMO systems","assignee":null,"inventors":[],"filing_date":"2020-06-12T00:00:00.000Z","publication_date":"2022-11-15T00:00:00.000Z","cpc_codes":["H04B","H04B","H04L","H04L","H04W","H04W","H04W","H04W"],"num_claims":13,"abstract":"The User Equipment (UE) initiates initial access by transmitting an uplink reference signal on at least one UE beam. Each Base Station (BS) carries out a spatial search of detected uplink reference signals, estimates the Angle of Arrival (AoA) of the uplink reference signals, forms a dedicated downlink beam toward the UE at the estimated AoA, and sends an acknowledgement for the uplink reference signal on the dedicated downlink beam. The UE carries out a spatial search of the received acknowledgement, and identifies the UE beam angular pointing position, from which receives the acknowledgement with the highest signal quality, as the UE beam boresight toward the BS. The UE sends a connection setup request message to the BS on the identified UE beam boresight. The uplink reference signals and acknowledgements comprise a single preamble, effectively carrying one bit of information, or carry a small payload."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Uplink-initiated fast and low overhead initial access for MU MIMO systems","description":"The User Equipment (UE) initiates initial access by transmitting an uplink reference signal on at least one UE beam. Each Base Station (BS) carries out a spatial search of detected uplink reference si","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-11503649","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-11503649","citation_suggestion":"Patentable. \"Uplink-initiated fast and low overhead initial access for MU MIMO systems\" (US-11503649). https://patentable.app/patents/US-11503649","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-11503649","json":"https://patentable.app/api/llm-context/US-11503649","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T13:27:56.655Z"}