Satellite GNSS Validity Reporting for Longer Continuous Communication
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Solution Overview
Problem
Satellite communication terminals face frequent transitions between connected and idle states due to GNSS validity expiration, leading to high signaling overheads and inability for long-time continuous communication.
Innovation Solution
Determine and report the GNSS second validity duration based on a reference time point within a measurement gap, allowing terminals to maintain synchronization and extend communication duration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal continuously initiates random access to enter and exit connected state, then the terminal can maintain communication synchronization, but the communication duration is limited and signaling overhead increases
Solution Approach 1:
The terminal performs GNSS measurement in advance during measurement gaps and determines the validity duration before communication. By reporting this pre-determined validity duration to the network device, the terminal establishes a known communication window without needing to continuously re-initiate random access, thus extending communication duration while maintaining synchronization reliability.
2Duration of action of moving object
If the terminal reports GNSS validity duration frequently to maintain connectivity, then continuous communication can be supported, but signaling overhead increases
Solution Approach 1:
The network device utilizes the reported GNSS validity duration to schedule continuous downlink transmissions within the valid communication window. By configuring multiple downlink assignments that fit within the reported duration, the system maintains continuous useful communication action without requiring frequent re-reporting or re-access procedures, thus reducing signaling overhead while supporting continuous communication.
Data Source
Figure 1~2b
Figure 2c~3
Figure 4a~5a
AI summary
A satellite communication method and an apparatus are provided, and are applied to the field of communication technologies. The method includes: A first communication apparatus determines GNSS second validity duration of the first communication apparatus in a global navigation satellite system (global navigation satellite system, GNSS) measurement gap, and then reports duration information indicating the GNSS second validity duration. Correspondingly, a second communication apparatus receives the duration information, and determines the GNSS second validity duration based on the duration information. The GNSS second validity duration may be determined based on a reference time point, and the reference time point may be included in the GNSS measurement gap. According to the method, duration of communication between the first communication apparatus and the second communication apparatus can be increased.