Wake-Up Signal Gap Timing for Receiver Clock Settling
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Solution Overview
Problem
IoT devices with low-cost technologies and crystal-free clock sources face communication errors due to clock synchronization issues, leading to increased recovery errors and decoding failures in wake-up signals.
Innovation Solution
Incorporating a gap duration in the wake-up signal structure to allow for hardware settling and configuration of receiver components, such as low-pass filters, based on the clock acquisition section, to optimize signal processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If wake-up signal is transmitted continuously without gap duration, then signal transmission efficiency is improved, but receiver hardware cannot settle properly causing increased recovery errors and decoding failures
Solution Approach 1:
The gap duration is inserted between the clock acquisition section and data section to provide preliminary time for receiver hardware settling before data reception begins. This preliminary action ensures hardware is fully configured and stable before processing actual data, thereby reducing recovery errors and decoding failures while maintaining efficient signal transmission structure.
2Measurement precision
If receiver hardware configuration is added to wake-up signal processing, then decoding accuracy is improved, but device complexity increases
Solution Approach 1:
The wake-up signal includes a clock acquisition section that performs preliminary clock synchronization and receiver configuration before the data section is received. This preliminary action embeds the necessary hardware configuration within the signal structure itself, improving clock synchronization accuracy without requiring separate complex configuration procedures or additional external devices.
3Reliability
If gap duration is added to wake-up signal structure, then receiver hardware settling is enabled, but signal transmission time increases
Solution Approach 1:
The wake-up signal is segmented into distinct sections: clock acquisition section, gap duration, and data section. This segmentation allows the gap duration to serve its specific function of enabling receiver hardware settling without interfering with the clock acquisition and data transmission processes. The segmented structure optimizes each section's function while minimizing overall time overhead.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a wake-up signal that includes at least a clock acquisition section, a data section, and a gap duration that is positioned between the clock acquisition section and the data section. The UE may configure, within the gap duration, receiver hardware using information that is based at least in part on the clock acquisition section. Numerous other aspects are described.