Communication Link Wake-Up With Split Signal Decoding
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Solution Overview
Problem
Existing wireless communication systems face high power consumption due to continuous monitoring and decoding of wake-up information by the wake-up receiver, even when no service data is being received or sent.
Innovation Solution
The wake-up information is split into two parts, with a shorter decoder used for the first part and a longer decoder for the second part, allowing the device to determine if the information is intended for it based on the first part, thereby reducing power consumption by avoiding unnecessary monitoring and decoding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wake-up receiver continuously monitors and decodes complete wake-up information through the wake-up link, then the device can reliably detect wake-up signals, but the power consumption increases significantly
Solution Approach 1:
The wake-up information is divided into two parts: a first part containing identifier information and a second part containing wake-up signaling. The device first decodes the first part using a short decoder to determine whether the identifier matches, and only if it matches does the device proceed to decode the second part using a long decoder. This segmentation allows the device to avoid unnecessary decoding operations, significantly reducing power consumption while maintaining reliable wake-up detection for intended devices.
2Measurement precision
If the device uses a long decoder to decode all wake-up information, then the decoding accuracy is maintained, but the power consumption increases
Solution Approach 1:
The decoding process is segmented into two stages: first, a short decoder processes the first part of wake-up information (identifier information) to quickly determine device matching; second, only if the identifier matches does a long decoder process the second part (wake-up signaling) to ensure accurate wake-up execution. This approach maintains decoding accuracy for critical wake-up signals while reducing overall power consumption by avoiding unnecessary long decoder operations.
Solution Approach 2:
The device performs partial decoding action by using a short decoder for the first part of wake-up information, which is sufficient for identifier matching but does not require the full decoding capability. This partial action is taken first to filter out non-target devices, and only when necessary does the device perform the complete decoding action with the long decoder for the second part, thereby reducing total power consumption while maintaining accuracy where needed.
Data Source
AI summary
This application relates to the field of communication technologies, and provides a method and an apparatus for waking up a communication link. The method includes: a first device monitors a first part of wake-up information through a first link; when the first device receives the first part of the wake-up information and the first part includes an identifier of the first device or a group identifier of the first device, the first device monitors a second part of the wake-up information; and the first device wakes up a second link when the first device receives the second part, where power consumption of the second link is greater than power consumption of the first link. According to the method, power consumption of a wake-up link of a receive device can be reduced.