Location-Based Cell Reselection for NTN Signal Inconsistency
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Solution Overview
Problem
In non-terrestrial networks, the accuracy of cell reselection based on reference signal receiving power (RSRP) is affected due to the long distance between satellites and the ground, leading to inconsistent signal measurements across a cell's center and edge.
Innovation Solution
Perform cell reselection using location information of the terminal device, including determining candidate cells based on RSRP or RSRQ, and selecting a target cell based on distance, reference point, or included angles relative to the network device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If cell reselection is performed based on RSRP in NTN, then the process can be simplified, but the accuracy of cell reselection deteriorates due to long satellite-ground distance causing inconsistent signal measurements
Solution Approach 1:
The patent introduces location information (geographical position, altitude) as an intermediary factor to bridge the gap between RSRP measurements and actual terminal position. This intermediary enables more accurate cell reselection by considering the terminal's spatial coordinates and cell coverage area parameters rather than relying solely on signal strength, thereby resolving the inaccuracy caused by long satellite-ground distances
2Quantity of substance
If RSRP is used for cell reselection in NTN, then signal measurement is sufficient, but location accuracy within a cell deteriorates due to uniform signal distribution from long distance
Solution Approach 1:
The patent transitions from two-dimensional signal-based selection (RSRP/RSRQ) to three-dimensional location-based selection by incorporating geographical position (latitude, longitude) and altitude dimensions. This dimensional expansion allows precise determination of terminal location within a cell by comparing calculated distance to cell center with cell coverage area parameters, thereby improving location measurement accuracy
Data Source
AI summary
A method for cell reselection, a terminal device, and a computer-readable storage medium are provided in implementations of the disclosure. The method is applicable to a terminal device. The method includes performing cell reselection according to first information, where the first information includes location information of the terminal device.