Satellite RNA Context Transfer for Low-Latency NTN Handover
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Solution Overview
Problem
The challenge of using RNA in non-terrestrial network (NTN) communication scenarios, where satellite movement necessitates frequent RNA updates and increased latency due to the need for context retrieval, is not effectively addressed by current technologies.
Innovation Solution
The method involves determining and managing RNA based on satellite mobility, enabling context transfer between satellites to maintain efficient service continuity by using communication interfaces, thereby reducing signaling overheads and latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If RNA is used in NTN communication scenarios with satellite movement, then service coverage is maintained, but frequent RNA updates are required increasing signaling overheads and latency
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple RNAs (first RNA, second RNA, third RNA) corresponding to different satellite service areas before the terminal actually moves between them. The network device determines which RNA to use based on predicted satellite positions and terminal mobility patterns, so that when the terminal needs to switch satellites, the appropriate RNA is already prepared and configured, avoiding the need for frequent RNA update procedures and reducing latency.
Solution Approach 2:
The patent implements dynamics by making the RNA configuration adaptive and time-varying. Different RNAs are configured for different time periods and satellite positions. The network device dynamically selects and switches between multiple RNAs based on real-time satellite mobility and terminal location, rather than using a static RNA configuration. This dynamic approach allows the system to maintain reliable service coverage while minimizing the frequency of RNA updates.
2Reliability
If terminal moves between satellite service areas, then service continuity is maintained, but frequent RNA updates increase signaling overheads
Solution Approach 1:
The patent applies merging by combining multiple RNA configurations (first RNA, second RNA, third RNA) into a unified RNA management framework. Instead of treating each RNA update as a separate signaling event, the system merges the configuration of multiple RNAs and their associated satellite service areas into a coordinated structure. The network device determines and manages multiple RNAs simultaneously, switching between them based on satellite positions, thereby maintaining service continuity while reducing the overall signaling overhead compared to frequent individual RNA updates.
Solution Approach 2:
The patent implements universality by creating a multi-functional RNA configuration system where a single RNA configuration framework can serve multiple satellite service areas. The first RNA, second RNA, and third RNA are all part of a universal RNA management mechanism that can handle different satellite positions and terminal locations. This universal approach allows the system to maintain service continuity across different satellites without requiring separate, dedicated RNA update procedures for each satellite transition, thereby reducing signaling overheads.
Data Source
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AI summary
A communication method and apparatus based on satellite communication are provided. The method includes: After determining a first RNA of a terminal at a first moment, a first apparatus may determine, based on the first RNA, that one or more first satellites are target serving access network devices of the terminal. The first RNA includes a service area corresponding to a part or all of cells of N satellites, and the first satellite is a satellite among the N satellites. The first apparatus may send a context of the terminal to the first satellite; or the first apparatus indicates one or more second satellites to send a context of the terminal to the first satellite.