Wake-Up Receiver Measurement Offloading for Low-Power State Transitions
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Solution Overview
Problem
Existing communication technologies face challenges in efficiently managing power consumption and latency in low-power wake-up signal (LP-WUS) measurements, particularly in idle and inactive modes, leading to suboptimal battery life and latency performance in critical use cases.
Innovation Solution
A terminal device evaluates conditions for offloading measurements from a main radio (MR) to a low-power wake-up receiver (LP-WUR) based on state transitions, using system information and measurements performed in a first state to determine when to apply measurement offloading to a second state, thereby reducing power consumption and optimizing state transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If measurements are performed continuously in idle and inactive modes using main radio, then measurement precision is maintained, but power consumption increases
Solution Approach 1:
The terminal device performs measurements in the first state (connected mode) before transitioning to the second state (idle or inactive mode) and stores these measurement results. When in the second state, the stored measurement results are reused instead of performing continuous measurements, thereby maintaining measurement precision while reducing power consumption during idle and inactive modes
Solution Approach 2:
The measurement results obtained in the first state are copied and stored for reuse in the second state. This allows the terminal device to use the copied measurement data instead of performing new measurements in low-power states, resolving the contradiction between maintaining measurement precision and reducing power consumption
2Loss of time
If measurement offloading is applied quickly upon state transition, then latency is reduced, but condition evaluation complexity increases
Solution Approach 1:
The terminal device stores system information containing conditions for measurement offloading during connected mode (first state). When transitioning to idle or inactive mode (second state), the device evaluates these pre-stored conditions using measurements performed in the first state, enabling fast measurement offloading without requiring complex real-time condition evaluation in the second state
Solution Approach 2:
The conditions for measurement offloading are predetermined and stored in system information before state transition. This preliminary preparation of condition criteria simplifies the evaluation process during state transition, reducing latency while maintaining manageable complexity
Data Source
Figure 1A~1B
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AI summary
Embodiments of the present disclosure relate to a solution for measurement offloading. In one aspect, the terminal device stores system information comprising at least one condition for applying measurement offloading from a first type of radio to a second type of radio. Based on the system information, the terminal device evaluates, based on at least one measurement performed in a first state, whether the at least one condition is satisfied. Based on determining that the at least one condition is satisfied, the terminal device applies the measurement offloading based on a state transition from the first state to a second state. Therefore, the power consumption of the terminal device is reduced.