Auxiliary Wireless Channel for Data Synchronization
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Solution Overview
Problem
Wireless data transmission systems for biological signal acquisition face challenges in synchronizing data due to uncontrolled and variable latency, which is not present in wired systems, leading to synchronization errors.
Innovation Solution
A method using an auxiliary wireless transmission channel with controlled latency to transmit synchronization signals alongside data packets, allowing for precise synchronization by determining the instant of data packet transmission based on known latency of the auxiliary channel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless transmission protocols implement sophisticated error detection and correction algorithms, then transmission reliability is improved, but latency becomes uncontrolled and variable
Solution Approach 1:
The patent introduces a secondary transmission channel as an intermediary with controlled latency characteristics. This channel carries synchronization signals that are time-stamped and used to recalibrate the time base at the receiving end, thereby mediating between the unreliable primary channel and the synchronization requirement.
Solution Approach 2:
The system performs preliminary time base synchronization by transmitting synchronization signals with known time stamps before or alongside data transmission. These preliminary synchronization actions allow the receiving system to predict and compensate for latency variations in the primary channel.
2Volume of moving object
If wireless data transmission is used to enable miniaturized portable systems, then system portability and miniaturization are improved, but synchronization precision deteriorates due to uncontrolled latency
Solution Approach 1:
The secondary synchronization channel acts as an intermediary that carries precise time reference information, enabling the miniaturized wireless system to maintain synchronization precision despite the inherent latency variations of wireless transmission.
Solution Approach 2:
The system creates a copy of the time base reference through synchronization signals transmitted on the secondary channel. This copied time reference is then used to align and synchronize the data received through the primary wireless channel, maintaining measurement precision in a miniaturized system.
3Adaptability or versatility
If separate acquisition systems are used for different signals, then system versatility and adaptability are improved, but synchronization capability deteriorates due to lack of communication between systems
Solution Approach 1:
The secondary synchronization channel serves as a universal communication infrastructure that enables synchronization between multiple separate acquisition systems. Each system can independently transmit synchronization signals on this shared channel, allowing versatile multi-system operation while maintaining synchronization capability.
Data Source
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AI summary
The method involves generating synchronization signals (S1sync-S3sync) at a transmission terminal (TE), where the synchronization signals comprise a temporal relation with a transmission moment of packets (S1eeg-S3eeg) of synchronize data. The packets or the synchronize data are transmitted on a transmission channel and the synchronization signals on an auxiliary transmission channel. The packets are received at a reception terminal (TR) to synchronize the synchronization signal. The packets received by the reception terminal are synchronized by the synchronization signal. An independent claim is also included for a data acquisition system.