Inter-device Interference Measurement in Full-Duplex Wireless Systems
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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 measuring IDI involves receiving an interference measurement resource in a measurement subframe and using an interference reference signal transmitted by a neighboring user equipment (UE), with data transmission either not occurring or occurring with zero power on the interference measurement resource, and mapping an interference reference signal for interference measurement to an uplink subframe according to interference reference resource configuration information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data is transmitted on the interference measurement resource, then the resource utilization is improved, but the measurement precision of IDI deteriorates due to interference from data transmission
Solution Approach 1:
The subframe is divided into two distinct parts: a measurement subframe where data transmission is suspended or transmitted with zero power to enable accurate IDI measurement, and normal data transmission subframes. This segmentation allows the system to separate measurement activities from data transmission activities, resolving the conflict between resource utilization and measurement precision.
Solution Approach 2:
The system performs IDI measurement in advance during measurement subframes before normal data transmission begins. By conducting measurements preliminarily when the channel is clear of data transmission interference, the system obtains accurate IDI values that can be used for subsequent interference mitigation during data transmission phases.
2Measurement precision
If an interference reference signal is transmitted by neighboring UE, then the IDI measurement capability is improved, but the device complexity increases due to additional signal transmission and coordination
Solution Approach 1:
Neighboring UEs autonomously transmit interference reference signals on uplink resources without requiring complex base station coordination for each transmission. Each UE independently generates and transmits its interference reference signal on configured uplink resources, allowing other UEs to measure the interference. This self-service approach improves measurement capability while minimizing additional system complexity.
Solution Approach 2:
The interference reference signal utilizes existing uplink communication resources and protocols that UEs already employ for normal data transmission. By repurposing existing uplink infrastructure for dual purposes (data transmission and interference measurement), the system enhances IDI measurement capability without requiring dedicated measurement infrastructure, thereby limiting the increase in device complexity.
3Measurement precision
If measurement subframe is used for IDI measurement, then the measurement accuracy is improved, but the data transmission efficiency deteriorates due to resource occupation
Solution Approach 1:
Instead of suspending all data transmission during measurement subframes, the system transmits data with zero power or suspends transmission only on specific resource elements allocated for interference measurement. This partial action approach maintains measurement accuracy by clearing the measurement resources while minimizing the impact on overall data transmission efficiency through selective rather than complete suspension.
Data Source
AI summary
The present invention relates to a wireless access system supporting a full duplex radio (FDR) transmission environment. A method for a terminal to measure interference in a wireless communication system supporting FDR according to an embodiment of the present invention comprises the steps of: receiving an interference measurement resource at a measurement subframe; and measuring, at the interference measurement resource, interference from a neighboring terminal on the basis of an interference reference signal transmitted from the neighboring terminal. In addition, data is not transmitted or is transmitted with zero-power in the interference measurement resource.