Wake-Up Radio Cell Reselection for Low-Power Serving Cell Selection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently selecting and switching serving cells, particularly in low power scenarios, which can lead to suboptimal network performance and increased power consumption.
Innovation Solution
The use of a low power wake-up radio for performing measurements and determining cell quality thresholds to facilitate efficient cell reselection, enabling more accurate and power-efficient serving cell selection and neighbor cell measurement configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional cell selection methods are used, then serving cell selection can be performed, but power consumption increases and measurement accuracy decreases
Solution Approach 1:
The patent divides the radio measurement system into two segments: a low-power wake-up radio for initial serving cell selection and a main radio for subsequent communications. This segmentation allows the device to use only the low-power radio for cell selection measurements, thereby reducing overall power consumption while maintaining measurement accuracy through the specialized low-power radio design
Solution Approach 2:
The patent performs preliminary serving cell selection measurements using the low-power wake-up radio before activating the main radio. By completing the cell selection process in advance using the low-power radio, the system avoids the need to continuously operate the high-power main radio for measurements, thus reducing power consumption while ensuring accurate cell selection is made before communication begins
2Productivity
If frequent cell measurements are performed, then network performance can be optimized, but power consumption increases
Solution Approach 1:
The patent implements periodic cell measurements using the low-power wake-up radio at specific intervals or under specific conditions (such as when serving cell quality thresholds are exceeded). This periodic measurement approach maintains network performance optimization while significantly reducing power consumption compared to continuous measurements by the main radio
Solution Approach 2:
The patent dynamically adjusts measurement frequency and radio activation based on serving cell quality conditions. When the serving cell quality exceeds certain thresholds, the system can reduce measurement frequency or keep the main radio inactive, thereby adapting power consumption to actual network conditions while maintaining productivity when needed
3Use of energy by moving object
If low power mode is used for cell selection, then power consumption is reduced, but measurement capability is limited
Solution Approach 1:
The patent creates a specialized low-power wake-up radio that copies the essential measurement functionality of the main radio but with reduced power consumption characteristics. This copied measurement capability is sufficient for serving cell selection tasks, allowing the device to perform necessary measurements in low-power mode without requiring the full capabilities of the main radio
Solution Approach 2:
The patent optimizes the low-power wake-up radio specifically for cell selection measurement quality rather than general-purpose communication quality. By tailoring the measurement capabilities locally to the specific requirements of cell selection, the system achieves adequate measurement precision for this specific function while consuming minimal power, without needing the full capabilities of the main radio
Data Source
AI summary
A wireless transmit/receive unit (WTRU) is disclosed. The WTRU may comprise a first radio, a second radio, and a processor. The processor may be configured to perform a first measurement of a first downlink signal and determine a first quality of a serving cell based on the first measurement. The processor may also be configured to perform a second measurement of a second downlink signal based at least in part on the first quality of serving cell exceeding a first threshold value. Further, the processor may also be configured to determine a second quality of the serving cell based on the second measurement. In addition, the processor may also be configured to determine a measurement configuration of at least one neighbor cell based at least in part on the second quality of the serving cell exceeding a second threshold value or a third threshold value and perform cell reselection.