High-Speed Railway Network Handover Control for Seamless UE Access
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Solution Overview
Problem
High-speed moving vehicles, such as high-speed railway trains, face communication challenges due to large penetration loss and varied terrains, leading to difficulties in maintaining network access when user equipment (UE) detaches from the dedicated network and accesses a public network, affecting user experience.
Innovation Solution
A method is implemented where a first core network control plane node device determines if UE accessing a public network is a high-speed moving vehicle user, and if so, transfers it back to the dedicated network by sending appropriate indication information to the public network base station, ensuring seamless reconnection to the high-speed moving vehicle's communications network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dedicated network is established for high-speed moving vehicles, then service quality for vehicle users is improved, but network complexity and deployment difficulty increase
Solution Approach 1:
The network is segmented into dedicated network cells for high-speed vehicles and public network cells, with distinct neighboring cell relationships configured for each segment. This allows specialized service quality in the dedicated network while maintaining standard public network operations elsewhere.
Solution Approach 2:
A mutual neighboring cell relationship is configured between dedicated network cells and public network cells near railway stations, acting as an intermediary that enables seamless transitions between networks without requiring complete network redesign.
2Adaptability or versatility
If UE detaches from dedicated network and accesses public network, then network access is maintained, but user experience deteriorates due to inability to return to dedicated network
Solution Approach 1:
The system preliminarily configures mutual neighboring cell relationships between dedicated and public networks in advance, so that when UE needs to switch networks, the path for returning to the dedicated network already exists and is pre-established.
Solution Approach 2:
The system implements feedback mechanisms where UE location and network status are continuously monitored, enabling automatic triggering of handover procedures when UE enters or exits dedicated network coverage areas, ensuring seamless transitions.
3Speed
If cell cascading and continuous coverage is used for high-speed railway dedicated network, then mobility handling is improved, but network deployment complexity increases
Solution Approach 1:
The high-speed railway dedicated network is segmented into multiple cells with cascaded relationships, where each cell is independently deployed but interconnected to provide continuous coverage along the railway route, enabling fast handovers while simplifying individual cell deployment.
Solution Approach 2:
Multiple dedicated network cells are merged to form a continuous coverage area along the railway line, creating a unified service region that maintains consistent service quality while allowing flexible individual cell deployment and management.
Data Source
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AI summary
Embodiments of the present invention provide a method for controlling UE to access a communications network of a high-speed moving vehicle, a core network control plane node device, a base station, UE, and a communications system. The method includes: determining that UE accessing a public network is first-type UE, and transferring the UE to the communications network of the high-speed moving vehicle. The first-type UE is UE used by a user taking the high-speed moving vehicle. In the embodiments of the present invention, user experience of the first-type UE is improved.