{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9642044","patent":{"patent_number":"US-9642044","title":"User equipment handover from a packet switched network to a circuit switched network","assignee":null,"inventors":[],"filing_date":"2015-08-28T00:00:00.000Z","publication_date":"2017-05-02T00:00:00.000Z","cpc_codes":["H04W","H04W"],"num_claims":13,"abstract":"Systems, methods, apparatuses, and computer program products are provided for facilitating voice call continuity in intersystem handover. A method may include determining that a user equipment device being handed over from a packet switched network to a circuit switched network is a party to a voice call in an alerting state. The method may further include providing session state information indicating that the user equipment device is a party to a voice call in an alerting state to a network entity on the circuit switched network in response to the determination. Corresponding systems, computer program products and apparatuses are also provided."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"User equipment handover from a packet switched network to a circuit switched network","description":"Systems, methods, apparatuses, and computer program products are provided for facilitating voice call continuity in intersystem handover. A method may include determining that a user equipment device ","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9642044","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-9642044","citation_suggestion":"Patentable. \"User equipment handover from a packet switched network to a circuit switched network\" (US-9642044). https://patentable.app/patents/US-9642044","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9642044","json":"https://patentable.app/api/llm-context/US-9642044","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T11:23:13.631Z"}