Full Duplex Timing Abort for Self-Interference Control
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Solution Overview
Problem
In wireless communication systems, particularly in full duplex (FD) operations, self-interference due to misaligned uplink and downlink timing can occur, leading to issues such as inter-symbol interference and clutter echo, which affect the efficiency and reliability of FD communications.
Innovation Solution
A configuration is provided to trigger the termination of FD operations based on a timing difference between uplink and downlink reception timings, allowing a UE or base station to request or initiate the termination of FD operations to align timing and reduce interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If full duplex operation is maintained, then spectrum efficiency is improved, but self-interference due to timing misalignment occurs
Solution Approach 1:
The system continuously monitors timing difference between uplink and downlink receptions and provides feedback to determine when to terminate full duplex operation. When the timing difference exceeds a threshold, the system triggers FD termination to eliminate self-interference, thus resolving the contradiction between maintaining spectrum efficiency and avoiding harmful interference.
Solution Approach 2:
The full duplex operation is made dynamic through conditional termination. The system transitions between full duplex and half duplex modes based on real-time timing conditions, allowing the system to adapt to changing channel conditions and minimize self-interference while maximizing spectrum efficiency when conditions are favorable.
2Object-generated harmful factors
If full duplex operation is terminated early, then self-interference is reduced, but communication efficiency decreases
Solution Approach 1:
The system changes the operational parameter (full duplex mode) based on a critical parameter (timing difference). By monitoring the timing difference parameter and comparing it against a threshold, the system determines when to terminate full duplex operation, thus reducing self-interference only when necessary and maintaining communication efficiency during favorable conditions.
3Object-generated harmful factors
If timing alignment is enforced, then self-interference is reduced, but device complexity increases
Solution Approach 1:
The system extracts and monitors only the critical timing difference parameter between uplink and downlink receptions. Instead of implementing complex continuous timing alignment mechanisms, the system simply measures the timing difference and triggers full duplex termination when the difference exceeds a threshold, thereby reducing self-interference with minimal added complexity.
Data Source
AI summary
Method and apparatus to allow a UE to request termination of an FD operation based on a timing different of uplink reception timing and downlink reception timing. The apparatus communicates with at least one TRP in a full duplex operation. The apparatus measures a timing difference of an uplink reception timing and a downlink reception timing of the full duplex operation. The apparatus transmits, to the at least one TRP, a request to terminate the full duplex operation based at least on the timing difference.