Wireless Communication Timing Offset Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional wireless communication systems face challenges in managing clock drift and jitter between peripheral and primary devices, leading to increased power consumption due to the need for early listening periods, which is undesirable for battery-powered devices and increases system costs.
Innovation Solution
A method and system that compensates only for clock jitter, allowing the primary device to initiate a receiving interval early enough to account for both clock drift and jitter, with the primary device determining a correction offset and adjusting the receiving interval based on the actual receive time, enabling the peripheral device to stabilize its transmission timing and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the primary device begins listening early to compensate for clock drift, then the reliability of communication is improved, but the power consumption of the primary device increases
Solution Approach 1:
The peripheral device performs preliminary timing adjustments by measuring the actual transmission time and calculating a correction offset before the next communication cycle. This allows the primary device to start listening at the correct time without excessive early listening, reducing power consumption while maintaining communication reliability through proactive timing synchronization.
2Use of energy by moving object
If the communication interval is lengthened to reduce power consumption, then the average power consumption is reduced, but the receiving interval must grow to compensate for clock drift
Solution Approach 1:
The peripheral device measures and stores the correction offset in advance, allowing the primary device to use this pre-calculated value to adjust its receiving interval. This eliminates the need for the receiving interval to grow with longer communication intervals, as the correction offset compensates for clock drift regardless of the interval length.
Solution Approach 2:
The system implements feedback by having the peripheral device measure the actual transmission time, calculate a correction offset, and use this feedback to adjust future transmission timing. This feedback mechanism allows the primary device to maintain accurate receiving intervals without extending the duration, as the correction offset dynamically compensates for clock drift.
3Measurement precision
If more accurate crystals are used to reduce clock drift, then the communication timing precision is improved, but the system cost increases
Solution Approach 1:
The peripheral device performs self-synchronization by measuring its own transmission time and calculating a correction offset without requiring expensive high-accuracy crystals. This self-service approach allows standard crystals to be used while still achieving precise timing through the feedback-based correction mechanism, reducing system cost while maintaining measurement precision.
Data Source
AI summary
According to one disclosed embodiment, a method for reducing power consumption in wireless communications is described. This method may include transmitting a data transmission from a peripheral device to a primary device during a receiving interval of the primary device, receiving a correction offset by the peripheral device from the primary device after the transmitting of the data transmission, and transmitting a subsequent data transmission from the peripheral device to the primary device using the correction offset to ensure that the subsequent data transmission by the peripheral device occurs within a subsequent receiving interval of the primary device.