L1-SINR Feedback for Beam Management in High-Frequency Interference
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Solution Overview
Problem
In high-frequency communication scenarios, relying solely on L1-RSRP-based channel measurement feedback is insufficient for successful beam management in strong interference environments, leading to inaccurate CSI estimation and increased complexity in CSI calculation.
Innovation Solution
Implementing a L1-SINR-based channel measurement feedback mechanism and providing explicit indication information from the network device to the terminal equipment regarding the measurement purpose of CSI resources, ensuring accurate differentiation between channel measurement and interference measurement resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If L1-RSRP-based channel measurement feedback is used, then the measurement process is simple, but the beam management fails in strong interference environments
Solution Approach 1:
The patent changes the measurement parameter from L1-RSRP (Received Signal Received Power) to L1-SINR (Signal to Interference plus Noise Ratio). This parameter change enables the system to account for interference effects, thereby maintaining beam management reliability in strong interference environments while keeping the measurement process relatively simple.
2Measurement precision
If L1-SINR-based channel measurement feedback is added, then the beam management accuracy improves, but the terminal equipment cannot determine the measurement purpose of CSI resources
Solution Approach 1:
The patent introduces an intermediary indicator (such as a specific field in Downlink Control Information or a dedicated signaling element) that explicitly indicates the measurement purpose of CSI resources. This intermediary element bridges the gap between the network's configuration intent and the terminal's interpretation, allowing the terminal to correctly identify whether CSI resources are for channel measurement or interference measurement without increasing complexity.
Solution Approach 2:
The patent segments the CSI resources into distinct types (channel measurement resources and interference measurement resources) with clear identifying indicators. By segmenting and explicitly labeling each resource type, the terminal can determine the measurement purpose without having to perform complex analysis of the overall configuration.
3Adaptability or versatility
If multiple resource settings are configured for CSI report, then the measurement flexibility increases, but the terminal equipment cannot distinguish the measurement purpose of each resource
Solution Approach 1:
The patent applies local quality by assigning specific identifying indicators to each individual resource setting within the multiple resource configurations. Each resource setting (whether for channel measurement or interference measurement) contains or is associated with a local indicator that specifies its purpose. This allows the terminal to distinguish the measurement purpose of each resource individually, maintaining measurement flexibility while preventing loss of purpose information.
Data Source
AI summary
A method and apparatus for indicating a measurement purpose of channel state information (CSI) and a communication system. The method includes: a terminal equipment receives first indication information transmitted by a network device, the first indication information indicating a measurement purpose of a first channel state information (CSI) measurement resource set of the terminal equipment; and the terminal equipment determines the measurement purpose of the first CSI measurement resource set according to the first indication information. A network device and the terminal equipment may have a common understanding of a purpose of the same CSI measurement resource.