Wake-Up Signal Capability Matching for Flexible UE Paging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current implementations of wake-up signal (WUS) functionality in wireless communication face limitations in flexibility due to heterogeneous capabilities of user equipment (UEs) leading to suboptimal energy consumption and increased power consumption across UEs.
Innovation Solution
A method and system that allows network nodes to determine a subset of wake-up signals based on the capabilities of UEs sharing a paging occasion, enabling flexible configuration and tailored WUS techniques to reduce power consumption and control-signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a separate WUR with simplified waveform is implemented, then energy consumption is reduced, but device complexity increases due to heterogeneous capability support requirements
Solution Approach 1:
The patent applies parameter changes by modifying the waveform parameters of wake-up signals to create multiple distinct signal types (e.g., different cyclic shifts, root indices, or frequency offsets). This allows the system to support both simple WUR implementations and more capable UEs by varying signal characteristics rather than hardware complexity, thereby reducing energy consumption for basic devices while maintaining compatibility across heterogeneous terminal capabilities.
2Adaptability or versatility
If multiple WUS signal designs are supported, then adaptability is improved, but control signaling overhead increases
Solution Approach 1:
The patent implements universality by designing a single WUS signal structure that can serve multiple functions through parameter variation. The same basic signal format can represent different wake-up indications by changing parameters such as cyclic shifts or root indices, allowing one signal design to replace multiple specialized signal designs. This reduces the need for extensive separate signaling configurations while maintaining adaptability to different UE capabilities.
Solution Approach 2:
The patent applies segmentation by dividing the WUS signal into multiple distinguishable variants through parameter segmentation (e.g., different cyclic shifts for different signal types). This allows the system to convey multiple types of wake-up indications within a unified signal framework, reducing the overhead required to signal support for multiple WUS designs while maintaining adaptability.
3Device complexity
If WUS functionality is added to existing LTE radio, then device complexity is reduced, but energy consumption increases
Solution Approach 1:
The patent resolves this contradiction by using parameter changes to create distinct WUS signal characteristics that can be detected by simplified WUR hardware. By varying parameters like cyclic shifts or root indices, the system enables a separate low-power WUR to identify and process wake-up signals without requiring full LTE radio functionality, thus reducing energy consumption while maintaining manageable device complexity through parameter-based signal differentiation.
Data Source
AI summary
A method of operating a network node (112, 131, 132) includes receiving control messages (4011) being indicative of capabilities of the terminals (101-103; 104-105) sharing a paging occasion (211-213) to support one or more wake-up signals (601-603) of a set (650) of wake-up signals (601-603). The method also includes determining a subset (651-653) from the set (650) of wake-up signals (601-603) based on the capabilities of the terminals (101-103; 104-105), the subset (651-653) including at least one wake-up signal (601-603) for use at the paging occasion (211-213).