Cell Measurement Using Low-Power Wakeup Radio
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently performing cell measurements while minimizing power consumption, especially in idle or inactive modes, due to the tradeoff between using the main radio and the low-power wakeup radio.
Innovation Solution
A method and apparatus for wireless communication that utilize a low-power wakeup radio (LP-WUR) to perform cell measurements in conjunction with a main radio, where the quantity and distribution of measurements are determined by an offloading parameter to balance power savings and measurement reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the main radio is used to perform cell measurements, then measurement reliability is improved, but power consumption increases
Solution Approach 1:
The patent divides cell measurement functionality between two separate radio components: the main radio (for high-reliability measurements) and the low-power wakeup radio (for power-saving measurements). This segmentation allows the system to distribute measurement tasks according to power and reliability requirements, resolving the contradiction by not relying on a single radio component for all measurements.
Solution Approach 2:
The patent applies partial action by having the low-power wakeup radio perform only specific cell measurements (such as serving cell measurements) rather than all possible measurements. This selective approach maintains sufficient measurement reliability for basic operations while significantly reducing overall power consumption compared to using the main radio continuously.
2Use of energy by moving object
If the low-power wakeup radio is used to perform cell measurements, then power consumption is reduced, but measurement precision deteriorates
Solution Approach 1:
The patent segments measurement tasks based on precision requirements: the main radio handles high-precision measurements when needed (e.g., for handover decisions), while the low-power wakeup radio handles lower-precision measurements for basic cell selection. This segmentation allows the system to maintain measurement precision for critical operations while using power-saving mode for less critical measurements.
Solution Approach 2:
The patent changes the operational parameters of the low-power wakeup radio by configuring it with relaxed measurement criteria and adjusted measurement intervals. These parameter changes enable the low-power radio to achieve sufficient measurement accuracy for its intended purposes while consuming significantly less power than the main radio.
3Reliability
If cell measurements are performed continuously, then cell selection reliability is improved, but power consumption increases
Solution Approach 1:
The patent implements periodic action by configuring the low-power wakeup radio to perform cell measurements at scheduled intervals rather than continuously. This periodic operation maintains cell selection reliability by performing measurements at appropriate intervals while dramatically reducing power consumption compared to continuous measurement operations.
Solution Approach 2:
The patent applies dynamics by adaptively adjusting measurement frequencies based on current network conditions and UE state. The system dynamically switches between using the main radio and low-power wakeup radio for measurements, adjusting the balance between reliability and power consumption in real-time based on factors such as mobility state and network conditions.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a configuration of a discontinuous reception (DRX) cycle. The UE may perform one or more first cell measurements using a main radio of the UE and one or more second cell measurements using a low-power wakeup radio (LP-WUR) of the UE, wherein a quantity of the one or more first cell measurements and the one or more second cell measurements are in accordance with a parameter. The UE may evaluate a cell selection criterion according to at least one of the one or more first cell measurements or the one or more second cell measurements. The UE may transmit a communication in accordance with the one or more first cell measurements, the one or more second cell measurements, or the cell selection criterion. Numerous other aspects are described.