Mobility State Estimation for Private Network Cell Exclusion
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Solution Overview
Problem
Unnecessary camping network selection by terminal devices leads to increased power consumption and network congestion, particularly in scenarios where terminal devices transition between high-speed and low-speed states near railway stations.
Innovation Solution
A mobility state estimation method where terminal devices exclude a specified number of private network cells from the mobility state estimation process, allowing for longer cell reselection times and reducing unnecessary network switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the terminal device performs mobility state estimation using all private network cells in the estimation period, then the cell reselection times are calculated accurately, but the terminal device may unnecessarily switch networks when passing through private network cells near stations, causing increased power consumption and network congestion
Solution Approach 1:
The patent extracts and removes private network cells from the mobility state estimation process when the terminal device is in high-speed state. Specifically, the terminal device excludes private network cells from the estimation period's cell reselection time calculation, thereby preventing unnecessary network switching while maintaining accurate speed estimation for legitimate high-speed scenarios
Solution Approach 2:
The patent applies different treatment to different cell types based on their local characteristics. Private network cells are differentiated from public network cells, and the estimation process adapts its behavior based on the cell type. When in high-speed state, private network cells are excluded from estimation, while public network cells remain included, creating locally optimized estimation behavior
2Adaptability or versatility
If the terminal device frequently switches between public and private networks based on mobility state estimation, then the network selection is optimized for current conditions, but unnecessary switching occurs near stations causing network congestion
Solution Approach 1:
The patent extracts private network cells from the estimation process during high-speed states, preventing the terminal device from making network selection decisions based on transient private network cell presence. This extraction eliminates unnecessary switching while preserving the ability to adapt to genuine mobility state changes
Solution Approach 2:
The patent implements preliminary exclusion of private network cells from estimation before network selection occurs. By pre-processing the estimation period to remove private network cells when in high-speed state, the system prevents premature or incorrect network switching decisions, thereby reducing congestion while maintaining adaptability
3Device complexity
If the terminal device uses a fixed estimation period for mobility state estimation, then the calculation is simplified, but the terminal device cannot accurately distinguish between high-speed and low-speed states near stations
Solution Approach 1:
The patent introduces dynamic adjustment to the estimation process based on the terminal device's current state. When in high-speed state, the system dynamically excludes private network cells from the estimation period, thereby adapting the estimation methodology to the current operational context. This dynamic approach maintains simplicity while improving accuracy for distinguishing high-speed from low-speed states
Data Source
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AI summary
Embodiments of this application disclose a mobility state estimation method and a terminal device. The method includes: in an MSE process, performing MSE in a target manner if a cell used to calculate cell reselection times in a first estimation period includes M private network cells; and the target manner includes one of the following manners: excluding N private network cells in the M private network cells from the MSE process; performing the MSE based on a cell in a second estimation period; and determining first target cell reselection times as final cell reselection times used for the MSE, where the first target cell reselection times are greater than first initial cell reselection times, and the first initial cell reselection times are obtained through calculation based on the cell used to calculate the cell reselection times. According to the method in this application, a possibility of a problem that unnecessary camping network selection performed by the terminal device causes unnecessary power consumption and network congestion can be reduced.