Temporary Identifier Allocation for High-Speed Railway UE Network Access
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Solution Overview
Problem
High-speed moving vehicles, such as high-speed railway trains, experience communication disruptions due to the lack of a mutual neighboring cell relationship between dedicated and public networks, preventing user equipment from seamlessly switching back to the dedicated network after accessing a public network, which affects user experience.
Innovation Solution
A method is implemented where a core network control plane node device allocates temporary identifiers to user equipment, distinguishing between first-type UE (used by high-speed moving vehicle users) and non-first-type UE, ensuring that first-type UE can access and return to the high-speed railway dedicated network by redirecting it from a public network through a dedicated network MMEC, even if it mistakenly accesses a public network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mutual neighboring cell relationship is not configured between dedicated network cell and public network cell on ongoing journey, then dedicated network resources are protected from misuse, but user equipment cannot return to dedicated network after accessing public network
Solution Approach 1:
The system pre-configures neighboring cell relationships between dedicated network cells and public network cells before the train reaches the station area. This preliminary configuration enables the UE to perform cell reselection from public network to dedicated network when entering the station coverage area, ensuring seamless network switching without requiring complex real-time decisions.
Solution Approach 2:
The patent applies different neighboring cell configuration strategies for different geographical areas: on the ongoing journey (non-station areas), no mutual neighboring relationship is configured to protect dedicated network resources; while in station areas, mutual neighboring relationships are configured to enable seamless switching. This localized differentiation resolves the contradiction between resource protection and switching flexibility.
2Productivity
If dedicated network cells are deployed only for ongoing journey without station area coverage, then dedicated network resources are optimized for high-speed movement, but user experience deteriorates at station areas
Solution Approach 1:
The patent divides the coverage area into two segments: dedicated network cells for ongoing journey areas optimized for high-speed movement, and public network cells for station areas. The neighboring cell configuration enables seamless transition between these segments, ensuring both high-speed communication efficiency and reliable station area coverage.
Solution Approach 2:
Public network cells serve as intermediaries in station areas where dedicated network cells are not deployed. The pre-configured neighboring cell relationships enable UE to access public network cells in station areas, maintaining service continuity while dedicated network cells continue to optimize high-speed journey coverage.
3Adaptability or versatility
If public network cells are configured as neighboring cells of dedicated network cells, then network switching flexibility is improved, but dedicated network resources are consumed by non-first-type UE
Solution Approach 1:
The system pre-configures neighboring cell relationships only in specific geographical areas (station areas) where public network access is expected, rather than throughout the entire dedicated network coverage. This preliminary, location-based configuration enables necessary switching flexibility while minimizing resource consumption by restricting public network accessibility to appropriate areas.
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 the communications network is first-type UE, allocating a temporary identifier that includes a first sequence to the UE, and sending the temporary identifier to the UE, where when the UE accesses a public network, the first sequence is used to instruct the base station to transfer the UE to the communications network. In the embodiments of the present invention, user experience of the UE is improved.