Radio Link Monitoring Evaluation Period Configuration
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Solution Overview
Problem
The existing radio link monitoring (RLM) methods in LTE are not suitable for future iterations, such as New Radio (NR), due to differences in reference signal resources configurations, making it challenging to determine an evaluation period for monitoring channel quality effectively.
Innovation Solution
A method to determine a common evaluation period for a set of reference signal resources, including those of different types or configurations, allowing wireless devices to monitor channel quality and determine synchronization with the network node.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If LTE RLM methods are used for NR architecture, then existing monitoring procedures can be maintained, but the methods are not suitable for future iterations due to differences in reference signal resources configurations
Solution Approach 1:
The patent introduces dynamic determination of evaluation periods based on reference signal resource configurations. The wireless device adapts the evaluation period length according to the specific NR reference signal resources being monitored, allowing the system to transition from static LTE procedures to dynamic NR-appropriate monitoring that adjusts to different signal types and configurations.
Solution Approach 2:
The patent changes the parameter of evaluation period configuration from fixed LTE values to variable values determined by NR reference signal resource characteristics. The evaluation period is now a configurable parameter that can be adjusted based on the specific reference signal resources, enabling adaptation to NR architecture while maintaining reliable monitoring.
2Device complexity
If a common evaluation period is determined for reference signal resources of different types or configurations, then UE complexity is reduced, but the diversity of reference signal resource configurations must be handled
Solution Approach 1:
The patent creates a universal evaluation period determination mechanism that works across different reference signal resource types and configurations. By establishing a common evaluation period that can accommodate diverse reference signal resources, the system achieves multi-functionality where a single monitoring framework handles various signal types without requiring separate complex procedures for each configuration.
Solution Approach 2:
The patent segments the reference signal resources into a set that shares a common evaluation period, while allowing individual resources within the set to have different types or configurations. This segmentation approach groups resources by their evaluation period requirements, reducing UE complexity by treating segmented groups uniformly while still supporting diversity within each segment.
3Reliability
If RLM evaluation period is configured for various radio environments, then monitoring effectiveness is improved, but configuration complexity increases
Solution Approach 1:
The patent performs preliminary determination of the evaluation period based on the configured reference signal resources before actual RLM begins. The network node and wireless device establish the evaluation period in advance as part of the RLM configuration, allowing the monitoring to proceed with pre-determined parameters rather than requiring complex real-time adjustments for different radio environments.
Data Source
AI summary
A wireless device or network node determines an evaluation period that is common to at least a portion of reference signal resources in a set of reference signal resources that are transmitted by the network node, with at least one of the reference signal resources in the set being of a different type or configuration than another of the reference signal resources in the set.