Reconfigurable Wake-Up Signal Sequences for Low-Power Detection
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Solution Overview
Problem
Existing wake-up techniques in wireless communication face issues such as significant latency and complex signal detection, which are not optimally addressed by current implementations.
Innovation Solution
A method for dynamically configuring the sequence design of wake-up signals, allowing for adjustable and re-configurable wake-up signals that can be tailored to the capabilities of the terminal, reducing power consumption and latency by using a low-power receiver for signal detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a low-power receiver is used for wake-up signal detection, then power consumption is reduced, but wake-up latency increases
Solution Approach 1:
The patent applies preliminary action by having the low-power receiver perform wake-up signal detection before the main receiver is activated. The low-power receiver continuously monitors for wake-up signals in a low-power state, and only when a wake-up signal is detected does the system transition to activating the main receiver. This preliminary detection mechanism avoids the need for the main receiver to continuously operate, thereby reducing overall power consumption while maintaining acceptable wake-up latency through the use of simple correlation-based detection algorithms.
2Device complexity
If a simple wake-up signal detection method is used, then device complexity is reduced, but measurement precision deteriorates
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the correlation threshold parameter based on signal conditions. The low-power receiver uses correlation-based detection with a configurable threshold that can be adapted to different signal environments. This allows the system to maintain simple detection logic while improving detection accuracy by optimizing the threshold parameter according to current channel conditions and signal strength, thereby resolving the contradiction between simple detection and high precision.
Solution Approach 2:
The patent introduces an intermediary mechanism by using the low-power receiver as a preliminary filter before the main receiver is activated. The low-power receiver performs initial signal detection and validation, acting as an intermediary stage that reduces false alarms and improves overall detection accuracy. This intermediary detection layer allows the system to use simpler detection methods while maintaining high precision through the collaborative operation of multiple reception stages.
3Adaptability or versatility
If reconfigurable sequence design is implemented, then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent applies dynamics by implementing reconfigurable sequence designs that can be dynamically adjusted based on terminal capabilities and channel conditions. The wake-up signal sequence parameters (such as sequence length, cyclic shift, and root index) can be reconfigured through RRC signaling to match different terminal types and service requirements. This dynamic reconfiguration capability allows the system to adapt to various scenarios while managing complexity through standardized configuration procedures and pre-defined parameter sets.
Data Source
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AI summary
A method, comprises communicating, between a base station (112) and a terminal (130, 130-1-130-4), a downlink control message (4001) indicative of a sequence design of a wake-up signal (4003); and communicating, between the base station (112) and the terminal (130, 130-1-130-4), the wake-up signal (4003) in accordance with the sequence design; and in response to said communicating of the wake-up signal (4003): communicating, between the base station (112) and the terminal (130, 130-1-130-4), at least one further signal (4004, 4005).