Reference Signal Association for Channel and Interference Measurement
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Solution Overview
Problem
Existing channel and interference measurement mechanisms in cellular networks are limited by the maximum of 32 antenna ports supported by CSI-RS, leading to inefficiencies in channel and interference measurement, especially in dynamic TDD networks and SBFD systems, where the association between reference signals for channel and interference measurement is lacking.
Innovation Solution
A flexible mechanism for channel and interference measurement that accommodates different numbers of antenna ports by using Precoding Matrix Indicator (PMI) reports and phase offset reports, along with associating reference signals for channel and interference measurement, allowing for accurate creation of a combined precoding matrix.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If CSI-RS is used for channel measurement, then measurement can be performed for up to 32 antenna ports, but measurement cannot be performed when antenna ports exceed 32
Solution Approach 1:
The patent segments the channel measurement process by introducing separate reference signals for channel measurement (CM-RS) and interference measurement (IM-RS), each optimized for specific measurement purposes. This segmentation allows the system to handle measurements for a larger number of antenna ports by dividing the measurement functionality into specialized components rather than relying on a single CSI-RS mechanism limited to 32 ports.
Solution Approach 2:
The patent extends the measurement capability by adding a new dimension to the reference signal design - introducing multiple reference signal types (CM-RS and IM-RS) with different port configurations and measurement purposes. This dimensional extension allows the system to accommodate more than 32 antenna ports by operating in an expanded parameter space of reference signal configurations.
2Measurement precision
If separate reference signals are configured for channel measurement and interference measurement, then identification of aggressor and measurement of interference strength can be performed, but measurement efficiency is reduced due to lack of association between the reference signals
Solution Approach 1:
The patent merges the functionality of channel measurement and interference measurement by establishing associations between CM-RS and IM-RS through common configuration parameters, resource links, and measurement object groupings. This merging allows the system to maintain separate measurement capabilities while improving efficiency through coordinated operation and shared configuration, enabling the victim UE to efficiently identify aggressors and measure interference strength using linked reference signal pairs.
Solution Approach 2:
The patent implements feedback mechanisms where measurement results from CM-RS and IM-RS are correlated and used together for CLI handling. The association between reference signals enables feedback loops where channel measurement information informs interference measurement interpretation, and vice versa, improving overall measurement efficiency and accuracy in identifying and characterizing cross-link interference.
Data Source
AI summary
New mechanisms for channel measurement and interference measurement between an aggressor and victim wireless includes transmitting a set of Reference Signals (RS) to a victim wireless device including M RS resources, wherein M is an integer larger than 1, and wherein an ith individual RS resource of the M RS resources includes Pi RS ports, wherein i is an integer and 1≤i≤M, and wherein Pi is an integer and Pi≥1. The method may include receiving a measurement report regarding the RS including a Precoding Matrix Indicator (PMI) report and a phase offset report. In another embodiment, a method includes indicating a RS configuration and a Cross Link Interference (CLI) measurement resource configuration, wherein each RS includes an aggressor ID, and wherein the CLI measurement resource configuration associates each one of the RS with CLI measurement resources. The method may also include transmitting the RS according to the RS configuration.