Satellite Retransmission Requests for Low-Latency Data Synchronization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In satellite-based communication networks, data transmission errors occur due to satellite movement and long delays in retransmission requests, leading to out-of-sync data reception at terminals.
Innovation Solution
A network device in the air determines data errors and directly sends retransmission requests to the transmitting end, bypassing the need for the receiving end to request retransmissions, ensuring quick data retransmission and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal sends a retransmission request through the satellite to the base station, then the data transmission reliability is improved, but the transmission delay increases significantly
Solution Approach 1:
The patent extracts the retransmission request function from the terminal and assigns it to the network device (satellite). The terminal no longer needs to send retransmission requests through the satellite to the base station; instead, the network device directly sends retransmission requests to the base station, removing the terminal from the retransmission request path and significantly reducing delay.
Solution Approach 2:
The network device (satellite) acts as an intermediary that directly communicates with the base station for retransmission requests. Instead of the terminal using the satellite as a relay to reach the base station, the satellite itself becomes the active intermediary that initiates retransmission requests directly to the base station, shortening the communication path.
2Device complexity
If ground base stations are used for coverage, then the network infrastructure is simple, but the coverage range is limited
Solution Approach 1:
The patent introduces satellite-based communication as a vertical dimension addition to the traditional ground-based horizontal coverage model. By deploying network devices in the air (satellites at high altitude), the system achieves three-dimensional coverage expansion, allowing terminals in remote areas to connect through satellite relay without requiring dense ground infrastructure.
3Area of stationary object
If data is transmitted through satellite relay, then the coverage range is expanded, but data transmission errors increase
Solution Approach 1:
The patent implements a feedback mechanism where the network device (satellite) monitors data transmission quality and automatically initiates retransmission requests when errors are detected. The base station receives feedback about transmission errors and retransmits data accordingly, creating a closed-loop error correction system that maintains reliability despite the extended satellite relay path.
Data Source
AI summary
A method for requesting retransmission performed by a network device located in air in a non-terrestrial network is provided. The method includes determining whether there is an error in data received from a transmitting end; determining there is an error in the data; and sending a request for retransmitting the data to the transmitting end.