Overall Interference Metric for Wireless Communication
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Solution Overview
Problem
Current wireless communication systems, such as 5G NR, face challenges in accurately measuring interference due to temporal and spatial variations, which can lead to skewed interference metrics at specific time instances or antennas, impacting decision-making and performance.
Innovation Solution
A method where a device measures interference metrics at multiple time instances or across multiple antennas, generating an overall interference metric that accounts for temporal and spatial variations, and transmits this metric to a base station to adjust modulation and coding schemes or transmission scheduling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If interference is measured at a single time instance, then measurement simplicity is maintained, but measurement precision deteriorates due to temporal variations and brief noise
Solution Approach 1:
The interference measurement process is segmented into multiple time instances rather than a single measurement. The device measures interference metrics at multiple discrete time points (e.g., different slots or sub-slots) and then combines these segmented measurements to form an overall interference metric, reducing the impact of temporal variations and brief noise events
Solution Approach 2:
The device performs periodic interference measurements at multiple time instances according to a configured measurement pattern. This periodic action allows the device to capture interference variations over time and select or combine measurements that represent the true interference level more accurately
2Productivity
If interference metric is used for transmission decisions, then communication efficiency is improved, but reliability deteriorates due to skewed measurements from brief noise
Solution Approach 1:
The device provides feedback to the transmitting device about the overall interference metric measured across multiple time instances. This feedback mechanism allows the transmitting device to adjust its transmission parameters (modulation and coding scheme, resource allocation) based on more reliable interference information, improving both communication efficiency and decision-making reliability
Solution Approach 2:
The device changes the parameter representation of interference from a single instantaneous value to an aggregated overall interference metric that reflects interference across multiple time instances. This parameter transformation makes the interference information more representative and reliable for transmission decisions
3Loss of information
If single time instance measurement is used, then reporting overhead is reduced, but information completeness deteriorates
Solution Approach 1:
The device extracts the essential interference information from multiple time instance measurements by computing an overall interference metric. Instead of reporting all individual measurements, the device extracts the most representative value (e.g., average, maximum, or selected measurement) that captures the interference conditions, reducing information loss while minimizing reporting overhead
Data Source
AI summary
An interference metric at a specific time instance may differ from interference metrics at different time instances. As a result, any actions based on the interference metric may unduly be influenced by such difference. In some implementations, an apparatus or device reports an overall interference metric that accounts for temporal variations in interference metrics at different time instances. An example method includes measuring, by a user equipment, an interference metric at two or more time instances for wireless signals transmitted by a base station, generating an overall interference metric based on the interference metrics at the two or more time instances, and transmitting, by the user equipment, the overall interference metric to the base station.