Cell Access Control for NTN Terminals with Timing Advance
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Solution Overview
Problem
The significant increase in signal transmission delays and varying delays among terminal devices in Non-Terrestrial Network (NTN) systems due to satellite communications necessitate improved cell access control mechanisms, particularly in managing Random Access Channel (RACH) resources and ensuring accurate Timing Advance (TA) determination.
Innovation Solution
The proposed solution involves classifying terminal devices into types based on their TA pre-compensation and positioning capabilities, and providing differentiated cell access control through cell access barring indication, random access resource configuration, and Unified Access Control (UAC) information to manage access flexibly and efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If satellite communications are used in NTN systems, then coverage area is significantly increased, but signal transmission delay varies greatly among terminal devices
Solution Approach 1:
The patent applies local quality by providing different access control parameters to different terminal types based on their specific characteristics. Terminal types are classified according to their positioning capabilities and TA pre-compensation capabilities, and each type receives customized access control information (such as different RACH resource configurations or UAC parameters) to optimize their access performance according to their local conditions and capabilities.
2Productivity
If differentiated access control for multiple terminal types is implemented, then network resource utilization is improved, but access control mechanism complexity increases
Solution Approach 1:
The patent segments terminal devices into different terminal types based on their capabilities (positioning capability, TA pre-compensation capability). This segmentation allows the network to apply different access control strategies to different groups, improving resource utilization by matching terminal capabilities with appropriate access parameters while managing complexity through structured classification.
Solution Approach 2:
The patent uses a unified access control framework that can handle multiple terminal types through a common mechanism. The network device provides access control information that works universally for all terminal types, with the specific parameters adapted to each type's capabilities. This multi-functionality approach allows a single access control system to serve diverse terminal requirements without requiring separate control mechanisms for each terminal type.
Data Source
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AI summary
The present application relates to the technical field of communications and provides a cell access control method and apparatus, a device, and a storage medium. The method includes: a terminal device receives first information from a network device, the first information being used for respectively determining the cells corresponding to the network device that at least two terminal types are allowed or prohibited to access; and according to the first information, the terminal device accesses or does not access the cells corresponding to the network device. In the present application, the first information is provided to the terminal device by means of the network device; the first information is used for respectively determining the cells corresponding to the network device that at least two terminal types are allowed or prohibited to access; and the terminal device accesses or does not access the cells corresponding to the network device according to the first information, so as to implement cell access control for different terminal types, respectively, thereby controlling the access of various terminals more flexibly and achieving better utilization of network resources.