Cross Link Interference Reporting via Layer 1 Signaling
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Solution Overview
Problem
Cross-link interference (CLI) in wireless networks, caused by large transmit power discrepancies and propagation conditions, negatively impacts network performance by disrupting communication between user equipment (UE) and base stations (BS).
Innovation Solution
A method for generating and reporting CLI reports within wireless networks, involving the reception of a CLI report configuration, measurement of CLI resources, and reporting of CLI measurements using Layer 1 or Layer 2 signaling, specifically through Downlink Control Information (DCI) on Physical Downlink Control Channel (PDCCH) or Media Access Control-Control Element (MAC-CE) on Physical Downlink Shared Channel (PDSCH), and reporting on Physical Uplink Control Channel (PUCCH) or Physical Uplink Shared Channel (PUSCH).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If UL and DL transmissions occur simultaneously in the same frequency resource, then network throughput is improved, but cross-link interference between UE and BS deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where the UE measures CLI on PDCCH resources and reports the measurements back to the gNB. The gNB uses this feedback information to adjust transmission parameters, thereby resolving the technical contradiction by enabling dynamic adaptation based on measured interference conditions.
Solution Approach 2:
The patent performs preliminary CLI measurements on PDCCH resources before actual data transmission. By measuring interference conditions in advance and reporting them, the system can proactively adjust transmission parameters to prevent severe interference, thus maintaining both throughput and interference control.
2Measurement precision
If CLI measurement resources are allocated frequently, then measurement accuracy is improved, but signaling overhead and device complexity increase
Solution Approach 1:
The patent reuses existing PDCCH resources for CLI measurement purposes in addition to their primary function of carrying downlink control information. This multi-functional use of PDCCH resources enables CLI measurements without requiring separate dedicated measurement resources, thereby improving measurement accuracy while avoiding increased device complexity.
Data Source
AI summary
Systems, methods, and apparatuses disclosed herein can generate and report a cross link interference (CLI) report. These systems, methods, and apparatuses can receive a CLI report configuration that outlines requirements for the CLI report, where the CLI report configuration is received on Layer 1 signaling, for example, Downlink Control Information (DCI) on a Physical Downlink Control Channel (PDCCH) or Layer 2 signaling, for example, downlink (DL) Media Access Control-Control Element (MAC-CE) on Physical Downlink Shared Channel (PDSCH). The CLI report configuration can identify the one or more CLI measurement resources to be measured and reported; one or more CLI measurements to be performed on the one or more CLI measurement resources; one or more CLI measurement occasions to measure the one or more CLI measurement resources; and one or more resources, to be used to report the CLI report. These systems, methods, and apparatuses can generate the CLI report as outlined in the CLI report configuration. Thereafter, these methods, and apparatuses can report the CLI report on Layer 1 signaling, for example, Uplink Control Information (UCI) on a Physical Uplink Control Channel (PUCCH) or Layer 2 signaling, for example, uplink (UL) Media Access Control-Control Element (MAC-CE) on Physical Uplink Shared Channel (PUSCH).