Terminal Device System Information Update Detection for Satellite Communication
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Solution Overview
Problem
In satellite communication systems using New Radio (NR) with multi-color deployment, the rapid movement of satellites leads to frequent beam switching, resulting in increased power consumption for terminal devices due to the need for repeated reading of system information from new cells.
Innovation Solution
A method where terminal devices determine whether system information of a new cell is updated by receiving indication information and using a predefined duration to decide if stored system information can be reused, thereby reducing the need for repeated readings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multi-color deployment is used to avoid interference between adjacent beams, then communication quality is improved, but terminal power consumption increases due to frequent beam switching and repeated system information reading
Solution Approach 1:
The network device performs preliminary action by sending indication information about system information updates before the terminal needs to read the system information. This allows the terminal to advance know whether system information has been updated, avoiding unnecessary reading operations and reducing power consumption during frequent beam switching while maintaining communication quality
Solution Approach 2:
The network device provides feedback through indication information that tells the terminal whether system information has been updated. This feedback mechanism allows the terminal to adjust its behavior accordingly - only reading system information when necessary - thereby resolving the contradiction between maintaining communication quality and reducing power consumption
2Measurement precision
If the terminal frequently reads system information of new cells due to rapid satellite movement, then cell reselection accuracy is maintained, but power consumption increases
Solution Approach 1:
The network device sends indication information in advance about system information update status, allowing the terminal to determine beforehand whether reading system information is necessary. This preliminary information enables the terminal to maintain accurate cell reselection by only reading when updates occur, while avoiding unnecessary readings that would increase power consumption
Data Source
AI summary
A wireless communication method, a terminal device and a network device. The method comprises: a terminal device receiving first indication information, wherein the first indication information is used for indicating whether system information of a first cell is updated; and the terminal device determining, according to the first indication information and a first duration, whether the system information of the first cell is updated.