{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9838921","patent":{"patent_number":"US-9838921","title":"Call re-establishment in a multi-layer heterogeneous network","assignee":null,"inventors":[],"filing_date":"2014-05-21T00:00:00.000Z","publication_date":"2017-12-05T00:00:00.000Z","cpc_codes":["H04W","H04W","H04W","H04W"],"num_claims":10,"abstract":"Methods and apparatus, including computer program products, are provided for call re-establishment. In one aspect there is provided a method. The method may include determining a radio link failure between a user equipment and a base station; and sending, by the user equipment after the determined radio link failure, a request to re-establish a connection, wherein the request includes layer information identifying the base station in a network. Related apparatus, systems, methods, and articles are also described."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Call re-establishment in a multi-layer heterogeneous network","description":"Methods and apparatus, including computer program products, are provided for call re-establishment. In one aspect there is provided a method. The method may include determining a radio link failure be","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9838921","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-9838921","citation_suggestion":"Patentable. \"Call re-establishment in a multi-layer heterogeneous network\" (US-9838921). https://patentable.app/patents/US-9838921","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9838921","json":"https://patentable.app/api/llm-context/US-9838921","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T15:44:09.966Z"}