Binary Wake-Up Sequences for Low-Complexity UE Signal Detection
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Solution Overview
Problem
Existing wireless communication systems face challenges in reducing complexity and processing requirements at receiver devices while maintaining low false alarm and mis-detection rates during wake-up signal monitoring, which hinders power conservation in user equipment (UEs).
Innovation Solution
Implementing binary wake-up signal (WUS) sequences with minimum sequence distance metrics, such as Hamming distances, to enable UEs to efficiently compare received sequences with assigned sequences, allowing for reduced complexity and power consumption by transitioning to higher power states only when the correct sequence is detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional wake-up signal sequences are used, then the UE can monitor for wake-up signals, but the processing complexity and power consumption at the receiver device increase
Solution Approach 1:
The patent changes the parameter of sequence design by using binary sequences with minimum distance properties. This parameter change simplifies the correlation operation at the receiver, reducing processing complexity and power consumption while maintaining reliable wake-up signal detection.
Solution Approach 2:
The patent extracts and emphasizes the minimum distance property of binary sequences, isolating this key characteristic to simplify the wake-up signal detection process. By focusing on this specific property, the system reduces the computational burden at the receiver without sacrificing detection accuracy.
2Device complexity
If binary sequences with minimum distance metrics are used, then processing complexity is reduced, but false alarm and mis-detection rates must be carefully controlled
Solution Approach 1:
The patent adjusts the sequence design parameters to achieve minimum distance properties, which inherently controls false alarm and mis-detection rates. The mathematical structure of these sequences ensures reliable detection while maintaining low processing complexity.
3Productivity
If the UE transitions to higher power states frequently, then message traffic can be received promptly, but power saving capabilities are reduced
Solution Approach 1:
The patent implements a feedback mechanism where the UE only transitions to higher power states when the minimum distance metric confirms a valid wake-up signal is present. This feedback-based approach prevents unnecessary state transitions, reducing power consumption while ensuring timely response to actual message traffic.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive control signaling indicating a first binary sequence corresponding to the UE, the first binary sequence included within a set of binary sequences, wherein a sequence distance metrics between each respective pair of binary sequences of the set plurality of binary sequences satisfies a first distance threshold. The UE may receive a radio frequency (RF) waveform within a wake-up signal (WUS) monitoring occasion, and may determine whether the received RF waveform is associated with the first binary sequence. The UE and may then transition from a first operational state to a second operational state associated with a higher power consumption based on determining that the received RF waveform is associated with the first binary sequence.