Inter-Satellite Data Relay for Store-and-Forward NTN Paging
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Solution Overview
Problem
Non-terrestrial network (NTN) communication systems face high service latency due to the store-and-forward operation mode, where the service link and feeder link are not simultaneously available, leading to increased paging latency and reduced success rates.
Innovation Solution
Implementing a data transmission method that involves data forwarding between satellites via inter-satellite links, allowing timely delivery of data to terminals by utilizing anchor-like and relay satellites to manage data routing and paging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If store-and-forward operation mode is used in NTN, then satellite can serve users with limited resources, but service latency increases and paging success rate decreases
Solution Approach 1:
The patent applies preliminary action by having the satellite send a paging message to the terminal before data arrives. This allows the terminal to prepare for data reception in advance, reducing the overall service latency and improving paging success rate by ensuring the terminal is ready to receive data when it arrives from the feeder link.
Solution Approach 2:
The patent implements dynamics by allowing flexible timing between paging and data arrival. The system dynamically adjusts the paging schedule based on expected data arrival times from the feeder link, enabling the satellite to optimize the interval between paging and actual data transmission, thereby reducing latency while maintaining reliable delivery.
2Productivity
If service link and feeder link are not simultaneously available, then satellite resource allocation is simplified, but data transmission efficiency decreases
Solution Approach 1:
The satellite performs preliminary actions by sending the paging message before the data arrives from the feeder link. This preliminary paging allows the terminal to be notified in advance, and the satellite can prepare the data transmission path, improving overall data transmission efficiency without requiring simultaneous availability of service and feeder links.
Solution Approach 2:
The patent maintains continuity of useful action by overlapping the paging transmission with the data reception period from the feeder link. While the satellite receives data from the feeder link, it simultaneously sends the paging message to the terminal via the service link, ensuring that both links are utilized effectively without requiring them to be simultaneously available for the same data transmission task.
Data Source
AI summary
This disclosure relates to a data transmission method and a satellite. The method includes the following. A first satellite receives data for a first terminal from a second satellite. The first satellite sends the data for the first terminal to the first terminal paged.