NR SIB Platform Identification for NTN Cell Reselection
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Solution Overview
Problem
Existing wireless communication systems, particularly in non-terrestrial networks (NTN), face challenges in efficiently conveying system information for neighboring cells due to the unique characteristics of NTN platforms, such as high-gain narrow-beam directional antennas and predictable movement, which complicates cell re-selection and handover processes.
Innovation Solution
The proposed solution involves categorizing neighboring cells into intra-platform and inter-platform cells in NTN systems, utilizing existing NR SIB structures with platform identifiers, and incorporating platform-specific and cell-specific information to minimize structural changes while optimizing resource usage and reducing overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If system information for neighboring cells is conveyed using existing NR SIB structures, then structural changes are minimized and ease of manufacture is improved, but the unique characteristics of NTN platforms (high-gain narrow-beam directional antennas and predictable movement) create complexity in cell re-selection and handover processes
Solution Approach 1:
The patent segments neighboring cells into intra-platform cells and inter-platform cells based on platform identifiers. This segmentation allows the system to apply different handling strategies for cell re-selection and handover processes, simplifying the overall complexity by dividing the problem into manageable parts that can be addressed separately.
Solution Approach 2:
The patent applies local quality by providing platform-specific information and cell-specific information tailored to different cell types. Intra-platform cells receive optimized system information that leverages the predictable movement and high-gain narrow-beam characteristics of NTN platforms, while inter-platform cells receive appropriate handover information, allowing each cell type to be handled with its specific requirements.
2Productivity
If platform-specific and cell-specific information is incorporated into SIB structures, then system information communication is optimized for NTN mobility, but the quantity of information transmitted increases
Solution Approach 1:
The patent uses a universal SIB structure that can serve multiple functions: it conveys platform identifiers for both intra-platform and inter-platform cell identification, provides cell-specific information for beam management, and enables both cell re-selection and handover processes. This multi-functionality reduces the need for separate information structures, optimizing productivity without proportionally increasing information quantity.
Solution Approach 2:
The patent incorporates platform identifiers and platform-specific information in advance within the SIB structures, allowing UEs to pre-process this information for efficient cell re-selection and handover decisions. By providing this information preliminarily, the system reduces the need for additional information exchanges during mobility events, optimizing communication efficiency while controlling information overhead.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive system information associated with a set of neighboring cells included in a non-terrestrial network (NTN). The UE may be connected to or camped in a current cell included in the NTN. The current cell may be associated with a current platform. The UE may monitor a neighboring cell, of the set of neighboring cells, based at least in part on the system information. Numerous other aspects are provided.