Interference Measurement Configuration for 5G RRM Accuracy
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Solution Overview
Problem
Current radio resource management (RRM) measurements in wireless communication systems, such as 5G NR, face inaccuracies in estimating downlink-downlink (DL-DL) and cross-uplink-downlink (UL-DL) inter-cell interference, leading to suboptimal interference management.
Innovation Solution
The solution involves configuring user equipment (UE) to perform interference measurements using the same reception beam for DL-DL interference and incorporating additional measurements for UL-UL and cross-UL-DL interference, enabling more accurate interference reporting and management through enhanced beam measurement and RRM configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional RRM measurements are used for interference estimation, then the measurement process is simple, but the measurement precision of DL-DL and cross-UL-DL interference is inaccurate
Solution Approach 1:
The patent segments interference measurement into multiple independent components: DL-DL interference measurement using downlink reference signals, cross-UL-DL interference measurement using uplink reference signals, and UL-UL interference measurement. Each interference type is measured separately using dedicated reference signals and reception beams, allowing accurate measurement of each component without mutual interference contamination.
Solution Approach 2:
The patent applies local quality by using the same reception beam for measuring both the desired downlink signal and the interfering downlink signal from neighboring cells. This ensures that the measurement is performed under identical spatial conditions, making the interference estimation accurate for the specific beam direction while maintaining simplicity in the measurement configuration.
2Reliability
If additional interference measurements are performed, then the reliability of interference management is improved, but the loss of time for measurement increases
Solution Approach 1:
The patent performs interference measurements using reference signals that are transmitted in advance before actual data transmission. By measuring DL-DL interference using downlink reference signals and cross-UL-DL interference using uplink reference signals beforehand, the system obtains accurate interference estimates without requiring additional measurement time during data transmission, thus maintaining high reliability while minimizing time loss.
3Measurement precision
If multiple interference types are measured separately, then the measurement precision of each interference type is improved, but the device complexity increases
Solution Approach 1:
The patent uses a universal measurement framework where the same reception beam and reference signal structures are applied across different interference measurement types. The base station configures and processes multiple interference measurements using a unified approach, reducing the complexity increase that would otherwise result from handling each interference type separately with different methodologies.
Data Source
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AI summary
A method, apparatus, and computer-readable medium are provided that performs an interference measurement with an enhanced accuracy. The apparatus detects a signal from a serving cell, a neighbor cell, or a second apparatus in the neighbor cell. The apparatus estimates at least one of a downlink-downlink interference and a cross-uplink-downlink interference of the neighbor cell or the second apparatus in the neighbor cell. In another aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided that configures a User Equipment (UE) to perform the interference measurement and receives an interference measurement report from the UE. The apparatus estimates at least one of an uplink-uplink interference and a cross-downlink-uplink interference of the neighbor cell or the second apparatus in the neighbor cell.