NTN Beam Switching via Pre-configured BWP and Polarization
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Solution Overview
Problem
In non-terrestrial networks (NTN) using multiple beams, continuous beam switching due to satellite or terminal movements increases signaling complexity, especially when the Frequency Reuse Factor (FRF) or Frequency Reuse/Polarization Factor (FRPF) exceeds 1, requiring frequent adjustments in bandwidth and polarization configurations.
Innovation Solution
A method where a communication node performs communication using multiple beams, generates measurement reports, and receives BWP configuration change information to adjust bandwidth and polarization settings, allowing for efficient beam switching with minimal signaling complexity by applying different resource configurations based on frequency and polarization changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam switching occurs continuously due to satellite or terminal movements, then communication connectivity is maintained, but signaling complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple BWP configurations with different frequency and polarization settings before beam switching occurs. The network entity prepares BWP configuration change information in advance based on predicted beam switching events, so that when switching actually happens, the terminal can quickly apply the pre-prepared configuration without complex real-time signaling exchanges.
Solution Approach 2:
The patent implements dynamics by enabling dynamic BWP configuration changes that adapt to varying beam switching conditions. The system dynamically adjusts frequency-domain positions and polarization settings of BWPs based on actual beam switching events, allowing the communication system to flexibly respond to movement while managing signaling complexity through controlled adaptation mechanisms.
2Adaptability or versatility
If BWP configuration changes occur frequently during beam switching, then resource allocation adapts to beam changes, but signaling overhead increases
Solution Approach 1:
The network entity performs preliminary action by pre-generating BWP configuration change information before beam switching events. Multiple BWP configurations are prepared in advance with different frequency and polarization parameters, allowing the system to quickly switch resources without generating excessive real-time signaling overhead.
Solution Approach 2:
The patent applies parameter changes by modifying frequency-domain positions and polarization settings of BWPs in a controlled manner. The system changes these parameters systematically based on beam switching decisions, enabling efficient resource reallocation while minimizing signaling overhead through structured parameter modification rather than complete configuration replacements.
3Productivity
If frequency and polarization configurations are changed during beam switching, then beam switching efficiency improves, but configuration adjustment time increases
Solution Approach 1:
The system applies preliminary action by pre-configuring multiple BWP settings with different frequency and polarization parameters before beam switching occurs. When beam switching is detected, the terminal can quickly apply the pre-prepared configuration rather than performing complex real-time calculations, significantly reducing configuration adjustment time while maintaining beam switching efficiency.
Solution Approach 2:
The patent implements dynamics by enabling rapid, adaptive configuration changes that respond to beam switching events. The system dynamically selects and applies appropriate BWP configurations based on actual switching conditions, optimizing the balance between configuration flexibility and adjustment speed through controlled dynamic parameter modification.
Data Source
AI summary
A first communication node may include the steps of: performing communication with a second communication node using a first beam from among multi-beams formed by the second communication node, on the basis of a first polarized wave and one or more first BWPs allocated by the second communication node; generating a measurement report including a measurement value for at least the first beam; transmitting the generated measurement report to the second communication node; receiving, from the second communication node, BWP configuration change information generated on the basis of beam switching determination based on the measurement report; and performing communication with the second communication node using a second beam from among the multi-beams, on the basis of information of a second polarized wave and information of one or more second BWPs identified on the basis of the BWP configuration change information.