NTN Measurement Timing Configuration for Propagation Delay
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Solution Overview
Problem
The long propagation delay in non-terrestrial networks (NTN) poses challenges for measurement operations, requiring enhancements to effectively manage synchronization signal/physical broadcast channel (SS/PBCH) block timing configurations across multiple cells.
Innovation Solution
The method involves receiving a measurement object configuration that includes a first SMTC and a third SMTC list, setting up SS/PBCH block timing configurations based on these parameters, and deriving measurement results from the SS/PBCH blocks to address the propagation delay issues in NTN.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If non-terrestrial network is introduced to increase coverage, then coverage area is improved, but propagation delay increases
Solution Approach 1:
The measurement timing configuration is segmented into multiple SMTC (SS/PBCH block measurement timing configuration) lists. The first SMTC list contains a first SMTC for general measurement, while the third SMTC list contains additional SMTCs specifically for cells with different propagation delays. This segmentation allows the system to maintain a single coverage area while accommodating multiple propagation delay characteristics through differentiated timing configurations.
2Measurement precision
If multiple SS/PBCH block timing configurations are set up for different cells, then measurement accuracy is improved, but device complexity increases
Solution Approach 1:
The system dynamically selects which SMTC configuration to apply based on the cell type and propagation delay characteristics. For cells in the third SMTC list with different propagation delays, the corresponding additional SMTC from the third list is applied. For other cells, the first SMTC from the first list is used. This dynamic adaptation enables accurate measurement without requiring all devices to handle all possible configurations simultaneously, reducing overall complexity.
Solution Approach 2:
Different SMTC timing configurations are applied locally to specific cells based on their propagation delay characteristics. The third SMTC list provides cell-specific timing adjustments only where needed (for cells with different propagation delays), while the first SMTC provides a general configuration for all other cells. This localized approach improves measurement accuracy for affected cells without unnecessarily complicating the overall system.
Data Source
AI summary
A method and apparatus for measurement in non-terrestrial network is provided. The method includes receiving a measurement object configuration comprising a first SMTC and a third SMTC list, setting up a first SS/PBCH block timing configuration for said measurement object based on the first SMTC, setting up additional SS/PBCH block timing configurations based on the first SMTC and the third SMTC list for the cells indicated in said pci-List parameter and deriving a measurement result based on the SS/PBCH block.