Cell Access Control for High-Speed Railway Dedicated Networks
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Solution Overview
Problem
High-speed railway dedicated networks experience congestion due to user equipment accessing them from urban areas, leading to decreased communication quality for mobile users on high-speed railways, as these networks often share frequencies with public LTE networks.
Innovation Solution
A cell access method and device that generate and send RRC information to terminals to determine their speed state and cell type, allowing them to access either high-speed railway dedicated networks or LTE networks based on preset conditions, thereby optimizing cell access and reducing congestion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If user equipment accesses high-speed railway dedicated network in urban areas, then communication coverage is improved, but network congestion occurs and communication quality for railway users deteriorates
Solution Approach 1:
The invention segments the network access rights by dividing users into different groups based on their movement characteristics. Mobile users on high-speed railways are separated from stationary users in urban areas through speed state detection and cell reselection parameter differentiation, allowing each group to access appropriate networks without causing congestion to the other.
Solution Approach 2:
The invention changes the cell reselection parameters dynamically based on the terminal's speed state. When a terminal is detected to be in a high-speed state, different reselection parameters are applied compared to low-speed states, enabling the system to adapt access control parameters according to user movement characteristics and prevent unauthorized access to railway dedicated networks.
2Quantity of substance
If high-speed railway dedicated network uses same frequency as public LTE network, then frequency resources are efficiently utilized, but network congestion and interference increase
Solution Approach 1:
The invention introduces speed state detection and differentiated cell reselection parameters as an intermediary mechanism between the public LTE network and high-speed railway dedicated network. This intermediary controls terminal access behavior, preventing stationary terminals from accessing railway networks while allowing high-speed railway terminals to access both networks, thereby reducing interference and congestion despite frequency reuse.
3Device complexity
If cell reselection parameters are made uniform for all terminals, then device complexity is reduced, but communication quality for different user groups deteriorates
Solution Approach 1:
The invention makes cell reselection parameters dynamic rather than static by detecting terminal speed states and applying different parameter sets accordingly. The system automatically adjusts reselection parameters based on whether the terminal is in high-speed or low-speed state, enabling adaptive optimization of communication quality without requiring complex manual configuration for different user groups.
Data Source
AI summary
The present disclosure provides a cell access method and device. The method is applied to a base station and can include generating RRC information that is used for instructing a terminal to determine a speed state of the terminal and a cell type of a cell to be accessed. The method can further include sending the RRC information to the terminal, so that the terminal determines the speed state and the cell type according to the RRC information and initiates access to the cell to be accessed when determining that the speed state and the cell type meet a preset cell access condition.