CSI Prediction via Interference Predictor for 5G Scheduling
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Solution Overview
Problem
In wireless communication systems, particularly in 5G networks, achieving high reliability and low latency is challenging due to interference, which complicates the reporting of accurate channel state information (CSI) for effective scheduling and communication.
Innovation Solution
A method where user equipment (UE) predicts CSI values for future time instants based on interference measurements and predictors, allowing for the reporting of anticipated channel conditions to the base station (BS), enabling more accurate scheduling and communication parameter determination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If interference measurements are taken at multiple time instants to improve CSI accuracy, then measurement precision improves, but loss of time increases due to multiple measurement opportunities required
Solution Approach 1:
The system performs preliminary interference measurements at multiple time instants and uses an interference predictor to pre-compute predicted interference values for future time instants. This preliminary action allows the CSI to be calculated in advance with high accuracy without requiring multiple measurement opportunities at the time of scheduling, thus resolving the contradiction between measurement precision and time loss.
Solution Approach 2:
An interference predictor is introduced as an intermediary component that processes historical interference measurements and generates predicted interference values for future time instants. This intermediary enables the system to obtain accurate CSI predictions without performing multiple actual measurements at different time points, thereby reducing time loss while maintaining measurement precision.
2Reliability
If CSI is reported for current time instant only, then reporting complexity is low, but reliability deteriorates due to outdated channel state information for future scheduling
Solution Approach 1:
The system performs preliminary calculations to predict interference and CSI for multiple future time instants in advance. This preliminary action enables the base station to have accurate CSI information ready for future scheduling decisions without requiring complex real-time reporting mechanisms, thus improving reliability while keeping reporting complexity manageable.
Solution Approach 2:
Instead of reporting actual measured CSI for each future time instant, the system creates predicted CSI values as copies based on historical interference patterns. These predicted CSI copies provide reliable channel state information for future scheduling without requiring the complex process of actual measurements and reports at each future time point.
3Productivity
If interference predictor is implemented to predict future interference, then productivity improves through better scheduling, but device complexity increases due to predictor implementation
Solution Approach 1:
An interference predictor is implemented as an intermediary component at the user equipment that processes historical interference measurements and generates predicted interference values. This intermediary enables more efficient and accurate scheduling decisions at the base station without requiring the base station itself to implement complex prediction algorithms, thus improving productivity while managing device complexity at the UE side.
Solution Approach 2:
The user equipment performs self-service by implementing the interference predictor locally to generate predicted interference and CSI values. This self-service approach enables the UE to provide the base station with pre-computed prediction results, improving overall system scheduling efficiency without requiring the base station to implement complex prediction functionality.
Data Source
AI summary
Wireless communication systems and methods related to interference prediction and reporting are provided. A user equipment (UE) obtains a sequence of interference measurements, where each interference measurement in the sequence is obtained at a different measurement time instant. The UE may determine, based on an interference predictor associated with the sequence of interference measurements, one or more predicted channel state information (CSI) values at one or more future time instants. The UE may transmit, to a base station (BS), a report including the one or more predicted CSI values.