Time-Based Wireless Configuration for Dynamic NTN Neighbor Cells
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Solution Overview
Problem
In non-terrestrial networks (NTN) with low Earth orbit (LEO) satellites, the dynamic changes in satellite positions lead to significant signaling load for providing neighbor cell lists to user equipment (UEs), as the list of neighbor LEO satellite cells changes frequently, necessitating efficient dynamic configuration methods.
Innovation Solution
A wireless device receives a single configuration set with time-based information, applying and discarding configurations autonomously based on validity timers, reducing the need for network-provided updates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the network provides dedicated signaling or broadcast signaling to update neighbor cell lists frequently due to satellite revolutions, then the neighbor cell list accuracy is improved, but the signaling load increases significantly
Solution Approach 1:
The network pre-configures multiple neighbor cell lists corresponding to different time periods or satellite positions before the actual handover occurs. This allows the UE to have the necessary configuration information ready in advance, eliminating the need for frequent real-time signaling updates as satellites revolve.
Solution Approach 2:
The patent implements dynamic configuration where the network provides multiple neighbor cell lists that are valid for different time periods or satellite positions. The UE dynamically selects the appropriate neighbor cell list based on current time or satellite position information, allowing the system to adapt to changing satellite configurations without continuous signaling.
2Measurement precision
If the network provides different neighbor cell lists to each UE based on geographical area, then the service accuracy is improved, but the signaling complexity increases
Solution Approach 1:
The neighbor cell lists are segmented into multiple sets, each corresponding to different geographical areas or satellite positions. Instead of providing a single comprehensive list or continuously updating lists, the network divides the configuration into discrete segments that the UE can select based on its current location or satellite visibility, reducing signaling complexity while maintaining accuracy.
3Measurement precision
If the network continuously updates configuration information to reflect dynamic satellite positions, then the configuration accuracy is improved, but the network resource consumption increases
Solution Approach 1:
Instead of continuous updates, the network provides configuration information periodically or at predetermined intervals corresponding to satellite orbital periods. The UE uses pre-configured neighbor cell lists that remain valid for specific time periods, reducing the frequency of network transmissions and associated resource consumption while maintaining adequate configuration accuracy.
Data Source
AI summary
A method and apparatus for utilizing a dynamic configuration in a wireless communication system is provided. A wireless device receives, from a network, a single configuration set including a first configuration associated with a first time information and a second configuration associated with a second time information. A wireless device applies the first configuration based on the first time information. A wireless device applies the second configuration and discarding the first configuration based on the second time information. The single configuration set is different from another single configuration set provided for another wireless device in the cell.