NTN Public Information Broadcasting for Efficient TA and RTT Updates
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Solution Overview
Problem
In Non-Terrestrial Network (NTN) systems, particularly in non-GEO scenarios, the frequent updates of common Timing Advance (TA) and Round-Trip Time (RTT) information lead to inefficient use of broadcast resources and increased power consumption due to the need for frequent system information updates, even when the information remains unchanged.
Innovation Solution
A method to broadcast common TA and RTT information without changing the system information update indication or valueTag, allowing for frequent updates without altering the system information update period, thereby reducing unnecessary receptions and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If common TA and RTT information is updated frequently in NTN systems, then the timeliness of timing synchronization is improved, but broadcast resource efficiency deteriorates and terminal power consumption increases
Solution Approach 1:
The patent segments system information into two categories: common information (TA, RTT) that updates frequently and other system information that updates less frequently. By using separate indication mechanisms (first system information update indication for common info, second for other info), the system can update common information without triggering full system information retransmission, reducing broadcast overhead and terminal power consumption while maintaining synchronization timeliness
Solution Approach 2:
The patent implements periodic broadcasting of common system information at configured intervals independent of other system information updates. The network device transmits common information periodically based on a configured period, allowing terminals to update timing synchronization regularly without being forced to monitor all system information changes, thus reducing power consumption while maintaining synchronization reliability
2Reliability
If common TA and RTT information is updated frequently, then the timing synchronization accuracy is improved, but broadcast resource usage efficiency deteriorates
Solution Approach 1:
The patent divides system information broadcasting into separate channels: common information (TA, RTT) broadcast independently with its own update indications, and other system information broadcast separately. This segmentation allows frequent updates of common information without triggering unnecessary retransmission of stable system information, improving broadcast resource efficiency while maintaining synchronization accuracy
Solution Approach 2:
The patent implements dynamic update mechanisms where the network device can independently control the update frequency and timing of common system information based on actual needs. The first system information update indication allows flexible, dynamic updates of common information without rigid periodic constraints, optimizing broadcast resource usage while ensuring timing synchronization accuracy
Data Source
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AI summary
The present application relates to the field of mobile communications. Disclosed are a method and apparatus for broadcasting public information, and a device and a medium. The method comprises: a terminal receiving first public information for an NTN that is broadcast by a network device. The updating of the first public information does not cause a change in a system information update indication, and/or the updating of the first public information does not cause a change in a value tag in an SIB1.