Dynamic Guard Interval for Air-to-Ground Wireless Scheduling
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Solution Overview
Problem
Current air-to-ground (ATG) communication systems configure a guard interval equal to or greater than the maximum time delay, which reduces throughput when user equipment (UE) is not at the cell's edge, as the fixed guard interval does not account for varying propagation delays across the cell radius.
Innovation Solution
Determine a guard interval less than the maximum time delay based on the cell radius for ATG communications, allowing for dynamic adjustment of the guard interval according to the UE's location and propagation delay, thereby optimizing transmission opportunities and improving throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed guard interval equal to or greater than the maximum time delay is configured, then collision avoidance is ensured, but throughput decreases when UE is not at the cell edge due to unnecessary delays
Solution Approach 1:
The guard interval is transformed from a fixed value to a dynamic parameter that adapts to the UE's location within the cell. The base station determines the guard interval based on the UE's distance from the cell center, allowing it to be shorter for UEs near the center and longer for UEs at the edge, thus optimizing both collision avoidance and throughput
Solution Approach 2:
Different guard interval durations are applied to different spatial locations within the cell. UEs in different radial positions receive customized guard interval configurations tailored to their specific propagation delay characteristics, rather than applying a uniform guard interval across the entire cell
2Device complexity
If a fixed guard interval is used for all UEs, then system simplicity is maintained, but communication efficiency decreases due to inability to adapt to varying propagation delays
Solution Approach 1:
The scheduling system dynamically adjusts the guard interval based on real-time UE location information. The base station calculates the appropriate guard interval duration for each UE according to its radial distance from the cell center, enabling adaptive optimization without requiring complex reconfiguration of the overall scheduling framework
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a base station associated with a cell of a time division duplex communication system may determine a guard interval that is less than a maximum time delay, based at least in part on a radius of the cell, for air-to-ground communications; and transmit a scheduling configuration to a user equipment that identifies the guard interval. Numerous other aspects are provided.