Event Triggered L1 Measurement Reporting for 5G Mobility
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in Layer 1 (L1) measurement reporting, particularly in 5G networks, where periodic and semi-persistent reporting consume excessive signaling resources and may not reflect timely channel conditions, leading to delayed handover decisions.
Innovation Solution
Implementing event-triggered L1 measurement reporting and filtering techniques, where user equipment (UE) reports measurements only when predefined conditions are met, reducing unnecessary reporting and improving measurement accuracy by using filtered L1-RSRP and L1-SINR results.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If periodic and semi-persistent L1 measurement reporting is used, then measurement coverage is improved, but signaling resource consumption increases excessively
Solution Approach 1:
The patent transforms continuous periodic reporting into event-triggered reporting, where measurements are reported only when specific conditions are met (e.g., when a neighbor cell becomes the best cell or when measurement quality thresholds are achieved). This maintains measurement coverage while eliminating unnecessary periodic signaling.
Solution Approach 2:
The system automatically determines when reporting is needed based on measurement conditions and network configuration, eliminating the need for continuous network-initiated reporting requests. The UE autonomously decides when to transmit measurement reports based on predefined triggering conditions.
2Duration of action of stationary object
If periodic L1 measurement reporting is implemented, then measurement continuity is improved, but reporting timeliness deteriorates due to delays
Solution Approach 1:
The patent pre-configures triggering conditions and thresholds before measurements are needed. When conditions are met (e.g., a neighbor cell becomes the best cell or measurement quality exceeds thresholds), immediate reporting is initiated without waiting for the next periodic interval, thus reducing delay while maintaining continuity.
Solution Approach 2:
The reporting mechanism dynamically adapts from fixed periodic intervals to condition-based timing. The system transitions between different reporting modes (periodic, semi-persistent, event-triggered) based on network conditions and measurement quality, optimizing both continuity and timeliness.
3Quantity of substance
If event-triggered reporting is used, then signaling resource usage is reduced, but measurement accuracy may deteriorate due to filtering
Solution Approach 1:
The patent applies filtering techniques (such as 3-sigma filtering or median filtering) to measurement values before triggering reports. These filtering algorithms process measurement parameters (L1-RSRP, L1-SINR) to eliminate outliers and stabilize values, ensuring that reported measurements are both accurate and meaningful, while reducing unnecessary signaling.
4Measurement precision
If L1 measurement reporting is performed continuously, then mobility decision accuracy is improved, but system complexity increases
Solution Approach 1:
The patent extracts and processes only the most critical measurement information (L1-RSRP, L1-SINR of serving and neighbor cells) and triggers reporting only when mobility decisions are likely needed. This selective approach maintains mobility decision accuracy while reducing the complexity of continuous monitoring and processing.
Data Source
AI summary
Embodiments of the present disclosure enable a user equipment (UE) to perform event trigger reporting for L1/L2 mobility, including event configuration, L1 filtering factor, and event triggered L1 reporting. Other embodiments may be described and claimed.