Full-Duplex Interference Measurement via Guard Time Segmentation
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently measuring inter-device interference (IDI) in full-duplex wireless communication systems, which affects the performance and reliability of communication.
Innovation Solution
A method for efficiently measuring IDI is developed, involving the design of a signal structure with guard times and zero-power intervals to prevent signal overlap, allowing for accurate interference measurement and resource allocation in full-duplex systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If full-duplex transmission is implemented to improve spectral efficiency, then communication capacity increases, but inter-device interference occurs between simultaneous transmissions
Solution Approach 1:
The transmission time is segmented into distinct intervals: normal transmission intervals for data communication and measurement intervals for interference measurement. This temporal segmentation allows the system to maintain full-duplex operation while periodically measuring and managing interference levels between devices
Solution Approach 2:
A base station acts as an intermediary to coordinate interference measurement intervals and manage uplink/downlink configurations. The base station controls when devices perform interference measurements and adjusts resource allocation to minimize inter-device interference while maintaining full-duplex communication capacity
2Use of energy by moving object
If simultaneous uplink and downlink transmissions occur to improve spectral efficiency, then resource utilization increases, but signal overlap and interference measurement difficulty worsen
Solution Approach 1:
The system performs interference measurements during predetermined measurement intervals before normal data transmission begins. This preliminary action allows interference to be measured and characterized before it affects data communication, enabling proactive interference management
Solution Approach 2:
Interference measurement is performed periodically at specific intervals rather than continuously. During these periodic measurement intervals, devices switch to measurement mode to assess interference levels, then return to normal full-duplex operation. This periodic approach balances measurement needs with resource utilization efficiency
Data Source
Figure 1(a)~1(b)
Figure 2
Figure 3~4
AI summary
The present invention relates to a wireless access system supporting a full duplex radio (FDR) transmission environment. The method by which a transmission terminal transmits a reference signal for interference measurement in a wireless communication system supporting FDR, according to one embodiment of the present invention, comprises the steps of: a transmission terminal configuring a measurement subframe for measuring inter-device interference; mapping a preamble to the measurement subframe; and transmitting, to a reception terminal, a reference signal through the measurement subframe to which the preamble has been mapped.