Satellite Cell Reselection Using Location-Based Measurement Parameters
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Solution Overview
Problem
User equipment (UE) in an idle or deactivated state frequently struggles to camp on a proper satellite cell due to the limitations of conventional satellite inter-cell reselection mechanisms, which rely solely on signal quality strength, leading to increased paging failures and suboptimal cell reselection in non-geostationary earth orbit (NGEO) satellite scenarios.
Innovation Solution
A satellite cell reselection control method that determines the UE's current location status and adjusts satellite cell reselection parameters, such as intra-frequency and inter-frequency/inter-system measurement thresholds, using location-specific scaling factors or sets broadcast by the satellite cell, to improve the matching of reselection control parameters with the UE's location.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional satellite inter-cell reselection mechanism is used, then device complexity is reduced, but reliability of cell reselection deteriorates
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting reselection parameters (intra-frequency measurement threshold, inter-frequency measurement threshold, hysteresis value, reselection timer) based on UE location status. Different parameter sets are selected according to whether the UE is in cell center or cell edge regions, enabling the system to adapt to varying signal conditions and improve reselection reliability without requiring fundamentally new architectural components.
Solution Approach 2:
The patent implements dynamics by making reselection parameters variable rather than fixed. The network broadcasts multiple parameter sets corresponding to different location statuses, and the UE dynamically selects the appropriate parameter set based on its current location determination. This dynamic adaptation allows the system to respond to changing signal conditions in real-time, improving reliability while maintaining manageable complexity through existing broadcast mechanisms.
2Reliability
If location-based parameter adjustment is implemented, then cell reselection reliability improves, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the satellite cell into different location regions (cell center and cell edge) and assigning distinct parameter sets to each region. This segmentation allows the system to manage complexity through modular parameter configuration rather than requiring a single complex reselection algorithm. The network broadcasts multiple discrete parameter sets that correspond to different location statuses, making the system more manageable while improving reliability through location-specific optimization.
3Productivity
If conventional signal quality-based reselection is used, then ease of operation is maintained, but productivity of reselection process deteriorates
Solution Approach 1:
The patent applies self-service by enabling the UE to autonomously determine its own location status and select the appropriate parameter set without requiring complex network control or manual configuration. The UE uses its positioning capabilities to identify whether it is in cell center or cell edge region, then automatically selects the corresponding broadcast parameter set. This self-service approach improves productivity through timely reselection while maintaining ease of operation, as the UE handles the complexity internally without affecting user experience.
Data Source
AI summary
A satellite cell reselection control method and a related device are provided. The satellite cell reselection control method includes: User equipment determines a current location status of the user equipment; the user equipment obtains a satellite cell reselection control parameter set corresponding to the current location status; and the user equipment performs satellite cell reselection control of the user equipment based on the obtained satellite cell reselection control parameter set.