Low-Power Wake-Up Measurement Reporting for Dual-Radio WTRUs
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Solution Overview
Problem
Existing early measurement reporting (EMR) procedures in wireless communication systems consume excessive power due to frequent radio state changes and lack efficient power-saving mechanisms for neighboring cell measurements.
Innovation Solution
A wireless transmit/receive unit (WTRU) equipped with a main radio (MR) and a low-power radio (LR) performs EMR using a low-power wake-up signal (LP-WUS) to selectively activate either radio based on serving cell quality, optimizing power consumption by initiating measurements with the LR when quality is high and the MR when quality is low.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the main radio (MR) is continuously activated for early measurement reporting, then measurement accuracy and reliability are improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic radio selection based on serving cell quality thresholds. When quality is high, the low-power radio performs relaxed measurements; when quality is low, the main radio performs full measurements. This dynamic adaptation resolves the contradiction by adjusting measurement intensity according to actual channel conditions.
Solution Approach 2:
The patent changes measurement parameters (timer values, frequency lists, cell IDs) based on serving cell quality. Two different measurement configurations are maintained: a first configuration for high-quality conditions with relaxed measurements, and a second configuration for low-quality conditions with comprehensive measurements. This parameter adaptation allows the system to maintain reliability while reducing power consumption in favorable conditions.
2Use of energy by moving object
If the low-power radio is used for early measurement reporting, then power consumption is reduced, but measurement precision and timeliness deteriorate
Solution Approach 1:
The patent applies different measurement parameters based on serving cell quality. When quality is high, relaxed measurement parameters are used with the low-power radio, achieving power savings. When quality is low, comprehensive measurement parameters are used with the main radio, ensuring accuracy. This conditional parameter selection resolves the precision-power contradiction.
Solution Approach 2:
The serving cell quality measurement acts as an intermediary that determines which measurement mode to use. This intermediary evaluation enables the system to intelligently switch between power-saving mode and accuracy mode, resolving the contradiction between these two opposing requirements.
3Productivity
If frequent radio state transitions are performed for measurement reporting, then measurement timeliness is improved, but power consumption increases
Solution Approach 1:
The patent implements periodic measurement reporting with different周期的 based on serving cell quality. When quality is high, measurements are performed at extended intervals using the low-power radio. When quality is low, measurements are performed more frequently using the main radio. This periodic adaptation resolves the contradiction between speed and power consumption.
Solution Approach 2:
The measurement reporting frequency is dynamically adjusted based on channel conditions. The system transitions between fast reporting mode (main radio) and slow reporting mode (low-power radio) according to serving cell quality, resolving the speed-power contradiction through dynamic behavior adaptation.
Data Source
AI summary
Methods are disclosed for a wireless transmit receive unit (WTRU) having a first radio, i.e., main radio (MR), and a second radio, i.e., a low power radio (LR) to initiate an early measurement reporting (EMR) procedure upon receiving a low-power wake up signal (LP-WUS) by the second radio, based on a received EMR configuration with one or more measurement time values. A radio resource control (RRC) message with an early measurement reporting (EMR) configuration may include an indication is to start a measurement timer upon receiving a low power wake-up signal (LP-WUS). Upon receiving the LP-WUS, the WTRU deactivates the first radio, activates the second radio and performs EMR measurements based on low power synchronization signals (LP-SS). Additional embodiments are disclosed.