CLI Measurement Reporting With Event Triggers for Dynamic TDD
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Solution Overview
Problem
Current 5G networks face challenges with cross-link interference (CLI) due to limited flexibility in duplexing modes, leading to reduced uplink coverage, increased latency, and reduced capacity, particularly in dynamic TDD and full duplex (FDU) deployments, where existing CLI measurement and reporting methods are inefficient and lead to undesirable behaviors or increased computational overhead.
Innovation Solution
Implementing event-triggered CLI measurement reporting based on L1/L2 measurements, using new criteria such as PDSCH decoding failures and sliding monitoring windows, allowing dynamic adjustment of reporting thresholds and intervals to improve CLI detection and mitigation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing CLI measurement and reporting methods are used in dynamic TDD and full duplex deployments, then CLI measurement can be performed, but computational overhead increases and reporting efficiency decreases
Solution Approach 1:
The patent implements dynamic TDD with flexible slot format indicators that allow the network to adaptively switch between uplink and downlink slots based on traffic conditions. The slot format indicator (SFI) mechanism enables dynamic reconfiguration of slot structures without requiring complex computational overhead for static configuration management, resolving the contradiction between measurement capability and device complexity.
Solution Approach 2:
The patent changes the reporting trigger parameters from event-based to periodic reporting with configurable periods. By adjusting the reporting period parameter and using periodic reporting instead of event-triggered reporting, the system reduces computational overhead while maintaining CLI measurement capability, directly addressing the contradiction between measurement precision and device complexity.
2Adaptability or versatility
If event-triggered reporting is used for CLI measurement, then reporting flexibility improves, but reporting frequency and overhead increase
Solution Approach 1:
The patent implements periodic CLI measurement reporting where UEs report CLI measurements at configured periodic intervals rather than triggering reports based on event conditions. This periodic action mechanism reduces the number of reports transmitted while maintaining adaptability through configurable period values, effectively resolving the contradiction between reporting flexibility and reporting efficiency.
Solution Approach 2:
The patent applies partial action by reporting CLI measurements only at periodic intervals rather than continuously or on every event trigger. This partial reporting approach reduces overall reporting overhead while maintaining sufficient monitoring capability through appropriately configured periodic intervals, addressing the efficiency-flexibility contradiction.
3Productivity
If periodic reporting with long periods is used for CLI, then overhead is reduced, but fast adaptation to interference conditions is lost
Solution Approach 1:
The patent implements dynamic adjustment of reporting periods based on interference conditions. When high CLI is detected, the system dynamically reduces the reporting period to enable faster adaptation. When interference levels are low, the period is extended to reduce overhead. This dynamic period adjustment resolves the contradiction between overhead reduction and adaptation speed.
Solution Approach 2:
The patent employs feedback mechanisms where the network monitors CLI measurement reports and adjusts reporting configuration parameters accordingly. When interference conditions change, the network provides feedback to modify reporting periods, enabling fast adaptation while maintaining overhead efficiency through condition-based parameter adjustment.
Data Source
AI summary
Systems, methods, apparatuses, and computer program products for event-triggered cross-link interference (CLI) measurement reporting. A method may include receiving a configuration with event triggered reporting from a network element. The configuration may specify criteria for triggering a cross-link interference measurement reporting. The method may also include performing cross-link interference measurements of at least one radio transmission on network configured resources based on the configuration. The method may further include determining whether the criteria has been satisfied based at least on a condition out of a set of conditions identified in the criteria. In addition, the method may include transmitting a measurement report of the cross-link interference measurements to the network element when the condition meets a predefined threshold.