CLI Reporting Payloads for Interference-Aware UE Scheduling
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Solution Overview
Problem
Existing wireless communications systems face challenges in efficiently managing cross-link interference (CLI) as the number of user equipments (UEs) increases, leading to frequent failed transmissions and excessive retransmissions, which reduce throughput and increase overhead.
Innovation Solution
UEs report channel state feedback (CSF) and CLI measurements to network entities, including indicators and values, and signal-to-interference-plus-noise ratio (SINR), allowing the network to trigger further measurements and schedule communications to minimize CLI.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of UEs in the wireless communications system increases, then system capacity and connectivity are improved, but interference between UEs increases leading to more failed transmissions and retransmissions
Solution Approach 1:
The patent implements CLI measurement and reporting mechanisms where UEs provide feedback to network entities about interference levels. This feedback enables the network to adjust scheduling decisions, resource allocation, and power control parameters to mitigate interference and improve transmission reliability as system capacity increases
Solution Approach 2:
The patent performs CLI measurements and reports before actual data transmissions occur. By measuring interference on reference signals and reporting these measurements in advance, the network can pre-adjust scheduling and resource allocation to prevent interference-related failures before they happen
2Reliability
If CLI measurement and reporting is implemented, then CLI minimization is improved, but measurement and reporting overhead increases
Solution Approach 1:
The patent designs the CLI measurement framework to serve multiple functions: measuring interference from known UEs, identifying unknown interferers, and providing feedback for scheduling decisions. By making the measurement system multi-functional, the patent reduces the need for separate dedicated measurement mechanisms and lowers overall system overhead
Solution Approach 2:
The patent extracts CLI measurement functionality from the general CSI measurement framework. By separating CLI-specific measurements (using dedicated reference signals) from general channel measurements, the system can optimize each function independently and reduce redundant measurements, thereby lowering overhead while maintaining measurement accuracy
3Measurement precision
If comprehensive CLI measurements are performed, then interference characterization is improved, but processing time and resource consumption increase
Solution Approach 1:
The patent segments the interference measurement process into distinct components: measuring interference from known UEs using dedicated reference signals, and characterizing unknown interference patterns. This segmentation allows the system to focus computational resources on the most critical measurements and use simpler methods for less critical aspects, reducing overall processing time while maintaining necessary measurement precision
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. In one aspect, a UE may report channel state feedback (CSF) to a network entity based on channel state information (CSI) measurements and CLI measurements. In another aspect, a UE may explicitly report CLI measurements to a network entity. In yet another aspect, a UE may report a signal-to-interference-plus-noise ratio (SINR) to a network entity based on CLI measurements, and the network entity may trigger the UE to perform further CLI measurements on signals received from other UEs based on the SINR. In yet another aspect, a UE may generate a report using CLI measurements based on whether the UE is allocated enough time to generate and transmit the report. In yet another aspect, a UE may identify a suitable priority for reporting CLI to a network entity.