Differential CSI Reporting for Lower Interference Measurement Overhead
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Solution Overview
Problem
Conventional techniques for generating and transmitting interference measurement reports in wireless communications are inefficient, particularly for low-latency applications, leading to excessive use of uplink resources.
Innovation Solution
Implementing a differential mode for interference-specific channel state information reporting, where the user equipment determines a setting for the interference measurement report based on an indication from the base station, allowing for the use of differential values relative to a baseline, reducing the amount of uplink resources required.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional techniques are used for generating and transmitting interference measurement reports, then reliable channel state information can be obtained, but excessive uplink resources are consumed
Solution Approach 1:
The patent extracts only the necessary interference measurement information from the complete channel state information. By separating the interference measurement report from the full CSI and transmitting only the interference-specific parameters (such as reference signal received power and signal-to-interference-plus-noise ratio) rather than all channel parameters, the solution reduces uplink resource consumption while maintaining the reliability needed for interference management.
Solution Approach 2:
The patent applies partial action by transmitting only the essential interference measurement parameters rather than the complete channel state information. The interference measurement report includes selective parameters (reference signal received power, signal-to-interference-plus-noise ratio) that are sufficient for interference management, avoiding the excessive transmission of unnecessary channel parameters and thus reducing uplink resource consumption.
2Loss of information
If complete channel state information is transmitted, then full channel characteristics are captured, but uplink resource overhead increases
Solution Approach 1:
The patent extracts only the interference-related parameters from the complete channel state information. Instead of transmitting all channel characteristics (including channel coefficients, precoding matrix indicators, and other CSI parameters), the solution extracts and transmits only the essential interference measurement parameters such as reference signal received power and signal-to-interference-plus-noise ratio, thereby reducing uplink overhead while preserving the necessary information for interference management.
Solution Approach 2:
The patent implements partial action by transmitting a subset of channel state information parameters that are specifically needed for interference measurement. The interference measurement report includes only the necessary parameters (reference signal received power, signal-to-interference-plus-noise ratio) rather than the complete set of channel characteristics, reducing uplink resource overhead while maintaining sufficient information for effective interference management.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. In some systems, a user equipment (UE) may receive, from a base station, a control message including an indication associated with a configuration for an interference measurement (IM) report in a channel state information (CSI) report. The UE may determine a setting of the configuration for the IM report based on the indication, which may include one or both of a resource setting associated with IM information in a frequency domain or a spatial setting associated with IM information in a spatial domain. The UE may generate the IM report based on one or both of the resource setting or the spatial setting and may transmit the CSI report including the IM report to the base station.