Model-Based Channel State Information Tracking
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Solution Overview
Problem
In wireless communication systems, especially in high mobility situations, channel variations occur more frequently than CSI updates, leading to performance loss due to increased CSI overhead and battery power consumption.
Innovation Solution
The implementation of model-based CSI tracking, where a model configuration is exchanged between network entities, allowing for the measurement and updating of channel conditions based on reference signals, thereby reducing unnecessary CSI overhead and conserving wireless resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If CSI updates are performed frequently to track channel variations, then channel tracking accuracy is improved, but CSI overhead and battery power consumption increase
Solution Approach 1:
The patent extracts only the essential channel variation information from full CSI updates by using a channel variation indicator that represents changes in channel conditions without transmitting complete CSI data. This selective extraction maintains tracking accuracy while reducing overhead and energy consumption.
Solution Approach 2:
The patent changes the parameter representation from full CSI (multiple parameters including channel quality indicator, precoding matrix indicator, rank indicator) to a simplified channel variation indicator that captures only the essential changes in channel conditions. This parameter transformation reduces the amount of data to be transmitted and processed.
2Measurement precision
If CSI updates are performed frequently to track channel variations, then channel tracking accuracy is improved, but CSI overhead increases
Solution Approach 1:
The patent extracts only the essential channel variation information from full CSI updates by using a channel variation indicator that represents changes in channel conditions without transmitting complete CSI data. This selective extraction maintains tracking accuracy while reducing overhead and energy consumption.
Solution Approach 2:
The patent applies partial action by transmitting only the necessary portion of channel information (channel variation indicator) rather than complete CSI data. This partial transmission is sufficient to track channel variations while avoiding the excessive overhead of full CSI reporting.
3Measurement precision
If model configuration is exchanged between network entities, then channel condition measurement capability is improved, but device complexity increases
Solution Approach 1:
The patent implements a universal channel variation indicator that can be used across different network entities (gNBs, UEs, IAB nodes) and different channel conditions. This multi-functional indicator design allows the same mechanism to serve various measurement needs without requiring entity-specific complex implementations.
Data Source
AI summary
This disclosure provides systems, devices, apparatus, and methods, including computer programs encoded on storage media, for tracking channel variations via a model-based representation of the channel. A first network entity may receive from a second network entity or transmit to the second network entity, a model configuration indicative of a model condition of a channel between the first network entity and the second network entity. The model configuration may be associated with one or more initial parameters. The first network entity may receive a reference signal from the second network entity to measure a condition of the channel between the first network entity and the second network entity, and transmit, to the second network entity, one or more updated parameters for the model configuration based on a measurement of the condition of the channel in comparison to the model condition of the channel based on the model configuration.