{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9854421","patent":{"patent_number":"US-9854421","title":"Transfer of emergency services session between disparate subsystems","assignee":null,"inventors":[],"filing_date":"2016-01-26T00:00:00.000Z","publication_date":"2017-12-26T00:00:00.000Z","cpc_codes":["H04W","H04L","H04W","H04W","H04W","H04W"],"num_claims":20,"abstract":"Methods and nodes for coordinating communication sessions are described herein. A method includes providing, by a control system, a signaling anchor point at a domain transfer function in a visited multimedia subsystem for an access signaling leg and a remote access signaling leg for a communication session between a user element and a public service access point and coordinating call signaling for the communication session via the access signaling leg and the remote signaling leg."},"analysis":{"summary":"The Transfer of Emergency Services Session Between Disparate Subsystems patent details a method for coordinating communication sessions to ensure seamless transfer of emergency calls between different networks. The core innovation involves establishing a signaling anchor point at a domain transfer function within a visited multimedia subsystem. This anchor point facilitates call signaling through access and remote signaling legs, enabling uninterrupted communication between a user element and a public service access point, even when the user switches between networks like VoLTE and Wi-Fi. The problem being solved is the prevalent issue of dropped emergency calls when users move between different network coverage areas, leading to delays and potential loss of critical location data. The key technical approach involves the signaling anchor point coordinating call signaling, ensuring a smooth transition. The business value lies in enhancing the reliability and efficiency of emergency communication services, providing a competitive advantage for telecom operators and improving public safety. The market opportunity is significant, with potential applications in mobile networks, emergency call centers, and public safety agencies, all striving for more robust and dependable communication systems during emergencies. This patent enhances public safety, reduces call drop rates, and ensures accurate location information is maintained during emergency calls, regardless of network changes.","layman_explanation":"The Transfer of Emergency Services Session Between Disparate Subsystems patent focuses on a critical issue in modern communication: ensuring that emergency calls remain connected even when you move between different types of networks, like your home Wi-Fi and your mobile phone's cellular connection. \n\n**What Problem Does This Solve?**\nImagine calling 911 from your home, connected to Wi-Fi. As you run outside to seek help, your phone switches to the cellular network. In many current systems, this switch can cause the call to drop, delaying your ability to get assistance. Existing solutions often fail because the technology for transferring a call between these different networks isn't seamless. It's like trying to plug a foreign appliance into a wall socket without an adapter – it just won't work. \n\n**How Does It Work?**\nThis patent introduces a 'signaling anchor point,' which acts like a central coordinator for your emergency call. Think of it as a translator that speaks both Wi-Fi and cellular 'languages.' When you move between networks, this anchor point ensures that the call is seamlessly transferred without interruption. It's similar to having a relay race where the baton (your call) is passed smoothly from one runner (network) to another, without any fumbling or dropping. The system maintains the call's connection and also preserves important information, like your location, ensuring that emergency services can find you quickly.\n\n**Why Does This Matter?**\nIn emergency situations, every second counts. A dropped call can mean the difference between life and death. This technology has significant market impact because it directly addresses a critical need for reliable communication during emergencies. It gives telecom companies a competitive advantage by offering a more dependable service. For investors, it represents a potential ROI due to its impact on public safety and the increasing demand for seamless communication solutions. \n\n**What's Next?**\nFuture applications could include integration with smart devices and expansion to support even more types of networks. Market adoption is likely to increase as emergency services and telecom providers recognize the value of this technology. From an investment perspective, this patent opens doors to opportunities in developing and deploying next-generation emergency communication systems.","technical_analysis":"The Transfer of Emergency Services Session Between Disparate Subsystems patent presents a technical solution to the problem of maintaining emergency calls during network transitions. The system architecture revolves around a signaling anchor point located at a domain transfer function. This anchor point acts as a central coordination hub for call signaling, managing both the access signaling leg (connecting the user device) and the remote signaling leg (connecting to the public service access point). The implementation details involve complex signaling protocols and handoff mechanisms to ensure a smooth transition between networks. The algorithm specifics include procedures for maintaining call state, transferring location information, and handling potential failures during the transition. The integration patterns require modifications to existing network infrastructure and signaling protocols. Performance characteristics are focused on minimizing call interruption time and ensuring high reliability. Code-level implications involve developing and implementing the signaling anchor point functionality, as well as modifying existing network elements to support the new protocols and procedures. The patent leverages existing communication protocols like SIP and RTP, but introduces a novel signaling mechanism to facilitate seamless handover between disparate networks. This requires careful management of session state and media streams to ensure that the call continues uninterrupted.","business_analysis":"The Transfer of Emergency Services Session Between Disparate Subsystems patent addresses a critical need in the emergency services sector: reliable communication regardless of network conditions. The market opportunity size is substantial, encompassing all mobile network operators, emergency call centers, and public safety agencies. The competitive advantages stem from the improved reliability and efficiency of emergency communication services. Revenue potential can be realized through licensing the technology to telecom operators and equipment manufacturers. Business models include software licensing, hardware integration, and service subscriptions. Strategic positioning involves partnering with public safety organizations and telecom providers to deploy the technology. ROI projections are based on reduced call drop rates, faster response times, and improved public safety outcomes. The ability to seamlessly transfer emergency calls between different networks provides a significant competitive edge, allowing operators to offer more reliable and life-saving services. This innovation can drive customer loyalty, reduce operational costs associated with failed calls, and improve brand reputation. The technology also aligns with the growing demand for robust and resilient communication infrastructure in the face of increasing network complexity and user mobility. The patent provides a strong foundation for building a successful business in the emergency services sector.","faqs":null,"topics":["emergency call transfer","seamless communication","VoLTE","Wi-Fi","network interoperability","transfer","emergency","services"],"tech_cluster":null},"seo":{"title":"Seamless Emergency Call Transfer - Patent US-9854421","description":"Discover the Transfer of Emergency Services Session Between Disparate Subsystems patent for seamless emergency call transfer between networks. Full analysis, claims, and technical details.","keywords":["emergency call transfer","seamless communication","VoLTE","Wi-Fi","network interoperability","public safety","patent","patent US-9854421"]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9854421","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-9854421","citation_suggestion":"Patentable. \"Transfer of emergency services session between disparate subsystems\" (US-9854421). https://patentable.app/patents/US-9854421","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9854421","json":"https://patentable.app/api/llm-context/US-9854421","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-31T18:37:58.119Z"}