Air-to-Ground Uplink Timing Advance for Aircraft Communication
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Solution Overview
Problem
Efficient communication between an aircraft or airplane (Air to Ground User Equipment, ATG UE) and a ground base station is hindered by timing delays, which impede effective data exchange.
Innovation Solution
A UE and serving cell system that includes transceivers, processors, and memories, executing instructions for receiving and transmitting signals based on timing advance values to manage communication timing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If communication is performed between ATG UE and ground base station over long distance, then coverage is extended, but timing delays increase causing communication inefficiency
Solution Approach 1:
The system performs preliminary timing alignment by calculating timing advance values based on random access channel message timing and applies this alignment before regular communication occurs. This preliminary timing adjustment ensures that subsequent communications are properly synchronized despite the large propagation delays inherent in ATG scenarios.
Solution Approach 2:
The system uses feedback mechanisms where the base station measures the timing of received messages from the ATG UE and sends timing advance commands back to the UE. This closed-loop feedback allows continuous adjustment of transmission timing to compensate for propagation delays and maintain synchronization.
2Productivity
If timing advance values are used to align transmission timing, then communication efficiency improves, but system complexity increases
Solution Approach 1:
The ATG UE autonomously calculates its own timing advance value by measuring the timing of random access channel messages and applies this timing adjustment independently. This self-service approach reduces the need for complex network-side timing management while still achieving efficient communication.
Data Source
AI summary
One disclosure of the present disclosure provides a UE performing communication. The UE comprises: one or more transceivers; one or more processors; and one or more memories which store instructions and can be operably and electrically connected to the one or more processors, wherein an operation performed on the basis of the instructions being executed by the one or more processors includes the steps of: receiving a system information message from a serving cell; and transmitting an uplink signal on the basis of a timing advance value.