{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9854491","patent":{"patent_number":"US-9854491","title":"Method and apparatus for controlling inter-PLMN handover to CSG cell","assignee":null,"inventors":[],"filing_date":"2016-11-08T00:00:00.000Z","publication_date":"2017-12-26T00:00:00.000Z","cpc_codes":["H04W","H04W","H04W"],"num_claims":30,"abstract":"A method and apparatus for controlling inter-PLMN handover based on CSG lists of equivalent PLMNs is provided. A method for receiving subscriber information of a terminal at a Mobility Management Entity (MME) includes transmitting an update location request message for the terminal to a Home Subscriber Server (HSS), and receiving an update location acknowledgement message with the subscriber information of the terminal from the HSS, wherein the update location request message comprises a list of equivalent Public Land Mobile Networks (PLMNs) among which the MME supports inter-PLMN handover of the terminal. The method and apparatus for controlling inter-plan handover to a CSG cell according to the present invention is characterized in that a control apparatus of a core network acquires the allowed CSG lists for determining a User Equipments (UEs) capability of access to a CSG cell and determines whether to permit inter-PLMN handover based on the allowed CSG lists."},"analysis":{"summary":"The Method and Apparatus for Controlling Inter-plmn Handover to Csg Cell patent introduces a novel method for ensuring seamless and efficient handover between different Public Land Mobile Networks (PLMNs) and Closed Subscriber Group (CSG) cells. This innovation addresses the problem of maintaining uninterrupted connectivity for mobile devices as they roam across different network operators and access specialized cellular groups.\n\nThe core technical approach involves leveraging CSG lists of equivalent PLMNs. The Mobility Management Entity (MME) receives subscriber information, including a list of equivalent PLMNs, from the Home Subscriber Server (HSS). This list enables the MME to determine whether a mobile device is permitted to access CSG cells during an inter-PLMN handover. The control apparatus of the core network acquires the allowed CSG lists and uses this information to determine the User Equipment's (UE) capability of accessing a CSG cell, thereby facilitating informed handover decisions.\n\nThe business value of this technology lies in its ability to improve the reliability of network connections, enhance the overall user experience, and reduce operational costs associated with troubleshooting handover issues. By implementing this system, mobile network operators can offer differentiated services based on CSG access and increase customer satisfaction. The market opportunity for this innovation is significant, as the demand for seamless and secure inter-PLMN handover solutions continues to grow with the increasing number of mobile devices and data-intensive applications. The patent opens up new avenues for mobile network equipment vendors and software providers to capitalize on this growing demand.","layman_explanation":"The Method and Apparatus for Controlling Inter-plmn Handover to Csg Cell patent addresses a common problem in mobile communication: maintaining a stable connection when your phone switches between different mobile networks, especially when dealing with special access groups.\n\n**What Problem Does This Solve?**\nWhen you travel or move between different areas, your phone often switches between different mobile network operators. This is like switching from one internet provider to another. Sometimes, you might also be part of a special group that has its own private network, like a company network or a residential community network. These are called Closed Subscriber Groups (CSGs). The problem is that switching between these networks and ensuring you still have access to your special group's network can be tricky. This can lead to dropped calls, slow internet, and a frustrating experience.\n\n**How Does It Work?**\nThis patent provides a solution by using a smart system that keeps track of which networks are equivalent and whether you're allowed to access the special groups. Think of it like having a VIP pass that works at different clubs in different cities. The system checks your pass to make sure you're allowed in each club as you move from city to city. In technical terms, the system uses something called CSG lists, which are lists of equivalent networks. When your phone switches networks, the system checks these lists to make sure you still have access to your special groups. This ensures a smooth transition without any interruptions.\n\n**Why Does This Matter?**\nThis technology matters because it improves the overall mobile experience. It reduces the number of dropped calls and ensures a stable internet connection when you're on the move. This is especially important for business professionals who rely on their phones for communication and data access. The market impact is significant, as it can lead to increased customer satisfaction and loyalty for mobile network operators. It also creates opportunities for new services and revenue streams, such as premium roaming packages.\n\n**What's Next?**\nThe future applications of this technology include integration with 5G and other advanced mobile networks. This will enable even faster and more reliable connections. The market adoption timeline is expected to be gradual, as mobile network operators upgrade their infrastructure to support this technology. However, the investment implications are clear: companies that adopt this technology will be well-positioned to compete in the rapidly evolving mobile landscape.","technical_analysis":"The Method and Apparatus for Controlling Inter-plmn Handover to Csg Cell patent presents a technical solution to the challenges of inter-PLMN handover, particularly when involving Closed Subscriber Group (CSG) cells. The architecture revolves around the interaction between the Mobility Management Entity (MME), the Home Subscriber Server (HSS), and a control apparatus within the core network.\n\nThe MME, responsible for managing UE mobility, initiates and controls inter-PLMN handovers. The HSS stores subscriber data, including CSG lists of equivalent PLMNs, which the MME retrieves. The control apparatus acquires allowed CSG lists to determine the UE's access capabilities.\n\nThe handover process involves the MME sending an update location request to the HSS. The HSS responds with an acknowledgement message containing the subscriber's CSG lists. The MME then analyzes these lists to determine CSG access authorization. The control apparatus uses the allowed CSG lists to decide whether to permit the handover.\n\nImplementation details include configuring the MME to communicate with the HSS and updating the control apparatus to interpret CSG lists. Integration patterns involve standard 3GPP interfaces. Performance is characterized by reduced dropped calls and improved CSG access control. Code-level implications involve modifications to MME and control apparatus software to handle CSG list processing and handover decision-making.","business_analysis":"The Method and Apparatus for Controlling Inter-plmn Handover to Csg Cell patent addresses a critical need in the mobile communications market: seamless handover between different Public Land Mobile Networks (PLMNs) and Closed Subscriber Group (CSG) cells. The market opportunity is substantial, driven by the increasing demand for uninterrupted connectivity as mobile devices roam across various networks.\n\nThe competitive advantage of this technology lies in its ability to leverage CSG lists of equivalent PLMNs, ensuring that only authorized devices can access restricted cellular resources. This enhances the security and integrity of the network, providing a differentiated service offering for mobile network operators. The revenue potential is significant, as operators can charge premium rates for seamless roaming services and improved CSG access control.\n\nThe business model involves licensing the patented technology to mobile network equipment vendors and software providers. Strategic positioning focuses on integrating this technology into existing mobile network infrastructure, enhancing the value proposition of network equipment and services. ROI projections indicate a significant return on investment, driven by increased customer satisfaction, reduced operational costs, and new revenue streams from premium roaming services.","faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Method and Apparatus for Controlling Inter-plmn Handover to Csg Cell - Patent US-9854491","description":"Discover how Method and Apparatus for Controlling Inter-plmn Handover to Csg Cell ensures seamless mobile network handover between PLMNs and CSG cells. Full patent analysis and claims.","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9854491","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-9854491","citation_suggestion":"Patentable. \"Method and apparatus for controlling inter-PLMN handover to CSG cell\" (US-9854491). https://patentable.app/patents/US-9854491","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9854491","json":"https://patentable.app/api/llm-context/US-9854491","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T15:53:54.205Z"}