Adaptive First RAT Measurement Scheduling for UE Power Reduction
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Solution Overview
Problem
Wireless communication devices supporting multiple radio access technologies (RATs) face performance degradation and battery life issues due to tune-away operations, particularly when measuring signal quality of one RAT is influenced by another RAT's high signal quality metrics.
Innovation Solution
A User Equipment (UE) device method that performs adaptive measurement of a first RAT while connected to a second RAT, balancing performance and power consumption by scheduling measurements based on signal quality metrics and other factors, such as movement speed and gap periods in the second RAT's channel configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the UE performs continuous measurement of the first RAT while connected to the second RAT, then the measurement precision and call quality are improved, but the power consumption increases
Solution Approach 1:
The patent implements periodic measurement of the first RAT instead of continuous measurement. The UE measures the first RAT at specific intervals or when certain conditions are met (e.g., during gap periods in the second RAT), which reduces power consumption while maintaining adequate measurement precision for call quality management.
Solution Approach 2:
The patent dynamically adjusts measurement behavior based on real-time conditions. The UE determines whether to perform first RAT measurement based on factors such as the signal quality metrics of the second RAT, movement speed, and current channel configuration, optimizing the balance between measurement precision and power consumption.
2Reliability
If the UE performs frequent tune-away operations to measure the first RAT, then the call quality is maintained, but the performance on the second RAT degrades
Solution Approach 1:
Instead of frequent continuous tune-away operations, the patent implements periodic measurement at specific intervals or during gap periods. This reduces the frequency of interruptions to the second RAT connection while still maintaining adequate knowledge of the first RAT signal quality for call quality management.
Solution Approach 2:
The patent changes the measurement parameters and timing based on current conditions. The UE adjusts measurement frequency and timing according to factors such as movement speed, signal quality metrics, and channel configuration, optimizing the balance between maintaining call quality and preserving second RAT performance.
3Measurement precision
If the UE measures the first RAT based on second RAT signal quality metrics, then the measurement accuracy is improved, but the measurement is influenced by external factors
Solution Approach 1:
The patent uses intermediary factors such as movement speed and gap period information to mediate the measurement process. These intermediaries help the UE determine appropriate measurement timing and frequency, reducing direct interference from the second RAT while maintaining measurement accuracy through indirect assessment methods.
Data Source
AI summary
Performing measurement of a first RAT while connected to a second RAT. The UE may initially communicate with a base station of the second RAT. While maintaining a connection to the base station of the first RAT, the UE may perform base station measurement of the first RAT (e.g., using a single radio of the UE). However, the measurement of the first RAT may be influenced by various factors, such as signal quality metrics of the second RAT. For example, if signal quality metrics are high for the second RAT, measurement of the first RAT may not be desirable, e.g., for battery life reasons.