Event-Triggered Measurement Report for LTE-WLAN Aggregation
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Solution Overview
Problem
Current LTE-WLAN aggregation techniques face challenges in dynamically adjusting configurations to improve throughput due to limitations in periodic measurement reports and the inability to detect improved signal strength/quality of WLAN, leading to suboptimal utilization of radio resources.
Innovation Solution
Implementing an event-triggered measurement report system that allows User Equipment (UE) to report better signal strength/quality of WLAN, enabling the network to dynamically adjust configurations for enhanced throughput by using two threshold values and AP IDs to trigger measurement reports.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If periodic measurement reports are used, then the network can obtain signal strength/quality information regularly, but radio resources are occupied and real-time changes cannot be conveyed promptly
Solution Approach 1:
The measurement reporting mechanism transitions from a static periodic approach to a dynamic event-triggered approach. The system now adapts the reporting behavior based on actual signal conditions, triggering reports only when specific events occur (signal improves by threshold A or deteriorates by threshold B), rather than reporting at fixed intervals regardless of condition changes.
2Device complexity
If event-triggered measurement reports are limited to specific 3GPP events, then the reporting mechanism is simple, but the network cannot detect when WLAN signal strength/quality improves
Solution Approach 1:
The system introduces new parameter definitions for event-triggered reporting specific to WLAN aggregation scenarios. Two threshold parameters (threshold A for signal improvement, threshold B for signal deterioration) are defined, allowing the UE to trigger reports based on these customized thresholds rather than being limited to standard 3GPP event definitions.
3Ease of operation
If the network cannot detect improved WLAN signal quality, then the configuration adjustment is simplified, but traffic volume through WLAN cannot be increased
Solution Approach 1:
A feedback mechanism is established where the UE continuously monitors WLAN signal strength and quality, compares against configured thresholds, and provides feedback reports to the network when events occur. This enables the network to detect signal improvements and dynamically adjust LWA configurations to increase WLAN traffic volume accordingly.
Data Source
AI summary
A mobile communication system including a base station, a WLAN AP, and a mobile communication device is provided. The base station transmits a first measurement configuration including a first threshold value and a second threshold value which is less than the first threshold value. The WLAN AP is configured with a serving AP ID and a neighboring AP ID. The mobile communication device connects to the WLAN AP with the serving AP ID, measures a first signal strength of the WLAN AP with the serving AP ID according to the first measurement configuration, measures a second signal strength of the WLAN AP with the neighboring AP ID according to the first measurement configuration, and transmits a first measurement report to the base station when the first signal strength is less than the first threshold value and the second signal strength is greater than the second threshold value.