CSI Reporting with Multi-Resource CLI Measurement in 5G NR
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently measuring and reporting cross-link interference (CLI) metrics, which are crucial for optimizing radio interface efficiency and coverage, especially in 5G/NR communication systems operating in higher frequency bands.
Innovation Solution
The implementation of a user equipment (UE) and base station configuration for CSI measurement and reporting, utilizing K measurement resources, where K≥1, to determine a CLI metric based on SRS or RSSI resources, and transmitting N indicators of the CLI metric, where N≥1, to enhance CLI measurement and reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple measurement resources (K≥1) are configured for CLI measurement, then measurement accuracy is improved, but device complexity and signaling overhead increase
Solution Approach 1:
The patent divides CLI measurement resources into multiple SRS resources and RSSI measurement resources, allowing the UE to measure different interference sources separately. The configuration message segments the measurement process into distinct resource types (SRS resources for uplink interference, RSSI resources for downlink interference), enabling precise measurement while maintaining organized resource management.
Solution Approach 2:
The patent introduces a new dimension for CLI measurement by configuring multiple measurement resources across different resource types (SRS and RSSI). This multi-dimensional approach allows the system to measure interference from different directions and sources simultaneously, improving measurement accuracy without requiring a single complex measurement mechanism.
2Loss of information
If multiple CLI metric indicators (N≥1) are reported, then reporting accuracy and completeness are improved, but uplink signaling overhead increases
Solution Approach 1:
The patent segments the CLI metric reporting into multiple indicators, where each indicator corresponds to a specific measurement resource or interference source. This segmentation allows the network to receive comprehensive CLI information without transmitting a single large-volume data structure, enabling selective processing and reduced overhead through targeted reporting.
Solution Approach 2:
The patent enables selective reporting of CLI metrics by configuring N indicators where N≥1. The network can request only the necessary number of indicators based on current network conditions, allowing partial reporting when full measurement sets are not required, thus reducing uplink overhead while maintaining information completeness when needed.
Data Source
AI summary
Apparatuses and methods for channel state information (CSI) measurement and reporting. A method performed by a user equipment (UE) includes receiving a configuration about a CSI report. The configuration includes information about K measurement resources and a report quantity that corresponds to a cross-link interference (CLI) metric. The method further includes measuring the K measurement resources, determining the CLI metric based on the measurement, and transmitting the CSI report including N indicators. Each of the N indicators indicate a respective value of the CLI metric. Each of the K measurement resources is a sounding reference signal (SRS) resource or received signal strength indicator (RSSI) measurement resource. The CLI metric is a layer 1 (L1) SRS-reference signal receive power (RSRP) value when each of the K measurement resources is the SRS resource or a L1 CLI-RSSI value when each of the K measurement resources is the RSSI measurement resource.