NTN Satellite Link Switching for Beam Timing and Uplink Gaps
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Solution Overview
Problem
Existing communication networks struggle with efficient satellite switching in non-terrestrial networks, particularly in scenarios involving satellite-based communication systems, due to challenges in managing propagation delays and beam management, which affect data transmission quality and user experience.
Innovation Solution
Implementing satellite switching mechanisms in non-terrestrial networks (NTNs) that utilize transparent and regenerative satellite models, along with advanced beam management techniques, to optimize data transmission and minimize propagation delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If satellite switching mechanisms are implemented in non-terrestrial networks, then data transmission quality and connectivity are improved, but device complexity and beam management challenges increase
Solution Approach 1:
The patent introduces network control entities and switching mechanisms as intermediaries that manage beam selection and satellite switching automatically. These intermediaries handle the complex beam management tasks, shielding end devices from the complexity while ensuring reliable data transmission through coordinated beam switching between satellites.
Solution Approach 2:
The system implements dynamic beam switching capabilities where beams can be selectively activated and deactivated based on satellite position, user equipment movement, and network conditions. This dynamic adaptation allows the network to maintain optimal transmission quality without requiring static, overly complex beam management configurations.
2Productivity
If advanced beam management techniques are used to optimize data transmission, then transmission efficiency is improved, but propagation delays and switching overhead increase
Solution Approach 1:
The patent implements prediction mechanisms that anticipate user equipment movement and satellite position changes in advance. By pre-calculating optimal beam switching时机 and preparing switching configurations beforehand, the system reduces actual switching delays and maintains continuous efficient data transmission without waiting for reactive adjustments.
Solution Approach 2:
The system employs beam switching mechanisms that ensure continuous data transmission by overlapping beam coverage areas and implementing seamless handover between beams. This continuity minimizes interruption time and maintains high transmission efficiency throughout the satellite switching process, preventing gaps in useful action.
Data Source
AI summary
A wireless device may receive, from a first satellite, a system information block comprising one or more configuration parameters indicating a first time for determining transmission of uplink signals via a cell, a second time when the cell stops serving an area, and ephemeris information of the first satellite. The first satellite may be a serving satellite. The wireless device may transmit, to the first satellite via the cell, a first uplink signal using a timing advance value, wherein the timing advance value is determined using the ephemeris information of the first satellite. The wireless device may switch, after the first time, a service link from the first satellite to a second satellite. The wireless device may not transmit, via the cell, an uplink signal between the first time and the second time.