Wake-Up Signal Detection Using a First Signal Resource Indicator
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Solution Overview
Problem
The clock drift between the terminal device and the network device's clocks in the detection of Wake Up Signals (WUS) affects the reliability of signal detection, leading to increased power consumption and complexity in the terminal device.
Innovation Solution
A method where a first signal is used to determine whether and how to detect a second signal for waking up the main radio of the terminal device, reducing power consumption and complexity by clarifying the time-frequency resources for detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal device continuously detects the second signal (WUS) to ensure reliable wake-up detection, then the detection reliability is improved, but the power consumption and detection complexity increase
Solution Approach 1:
The patent applies preliminary action by introducing a first signal that is detected before the second signal (WUS). This first signal provides advance information about whether the second signal will be transmitted and its time-frequency resources. By performing this preliminary detection, the terminal device can avoid continuous detection of the second signal, thereby reducing power consumption while maintaining detection reliability.
Solution Approach 2:
The first signal acts as an intermediary between the network device and the terminal device's WUS detection process. It carries information that mediates the terminal's detection behavior, indicating whether WUS detection should occur and providing resource information. This intermediary signal reduces the need for continuous WUS detection, lowering power consumption while ensuring reliable wake-up detection when needed.
2Reliability
If the terminal device continuously detects the second signal (WUS) to ensure reliable wake-up detection, then the detection reliability is improved, but the detection complexity increases
Solution Approach 1:
The first signal performs preliminary action by providing advance information about the second signal's transmission status and resources. This preliminary detection simplifies the subsequent WUS detection process by eliminating the need for continuous monitoring and reducing the search space, thereby lowering detection complexity while maintaining reliability.
Solution Approach 2:
The first signal serves as an intermediary that simplifies the terminal device's detection complexity. By carrying information about WUS transmission status and resource allocation, it mediates the detection process, allowing the terminal to focus resources on targeted detection rather than continuous monitoring, thus reducing overall detection complexity.
3Use of energy by moving object
If the terminal device uses a secondary radio with low power consumption to detect the WUS, then the power consumption is reduced, but the clock drift between terminal and network device increases, affecting detection reliability
Solution Approach 1:
The first signal acts as an intermediary that bridges the clock drift issue between the low-power secondary radio and the network device. By providing reference information and resource indication, it enables the secondary radio to accurately detect the second signal despite clock differences, maintaining detection reliability while keeping power consumption low.
Data Source
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AI summary
The embodiments of the present application provide signal detection methods and apparatus, a signal transceiving apparatus, a terminal device and a network device. The method comprises: a terminal device detecting a first signal, the first signal being used for determining whether to detect a second signal, and/or determining a time domain resource and/or frequency domain resource for detecting the second signal, wherein the second signal is used for waking up a main receiver of the terminal device.