{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9832686","patent":{"patent_number":"US-9832686","title":"Procedures for 3GPP circuit switched fallback","assignee":null,"inventors":[],"filing_date":"2015-07-06T00:00:00.000Z","publication_date":"2017-11-28T00:00:00.000Z","cpc_codes":["H04W","H04W","H04W","H04W","H04W","H04W","H04W"],"num_claims":16,"abstract":"Mobile devices, base stations, and/or relay stations may implement CSFB (circuit switched fallback) operations by using RRC (radio resource control) connection release and/or handover procedures. If the CSFB RAT (radio access technology) target is not well configured, the UE may be informed and provisioned by the NW during a CSFB procedure with the information to return to LTE. Having this information, the UE may perform an autonomous search of LTE cells after the CSFB call release, speeding up return to LTE. To minimize potential call failures during CSFB, the UE may autonomously perform an additional cell search, in particular a search for cells on a RAT different from the initial target RAT. This creates an opportunity to prevent call failure of CSFB calls that would otherwise fail. The UE may be provisioned during the CSFB procedure with information to perform the additional cell search, should such a search be necessary."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Procedures for 3GPP circuit switched fallback","description":"Mobile devices, base stations, and/or relay stations may implement CSFB (circuit switched fallback) operations by using RRC (radio resource control) connection release and/or handover procedures. If t","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9832686","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-9832686","citation_suggestion":"Patentable. \"Procedures for 3GPP circuit switched fallback\" (US-9832686). https://patentable.app/patents/US-9832686","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9832686","json":"https://patentable.app/api/llm-context/US-9832686","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T10:12:20.134Z"}