One-Way Data Transmission Using Difference Sensor Values
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Solution Overview
Problem
Bluetooth Low Energy (BLE) communication in blood pressure monitors faces issues such as complex pairing operations, high hardware requirements, high development costs, large communication overhead, and unsuitability for small data transmission, particularly in one-way communication scenarios where data reception verification is challenging and transmission efficiency is reduced.
Innovation Solution
A data transmission apparatus generates packets for one-way communication that include difference sensor data, allowing for reduced data capacity transmission by using a reference value, which can be securely transmitted without storing the reference value in the packet, and includes an identifier for the reference value to ensure secure restoration of sensor data at the reception end.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If one-way communication is used to simplify the communication process, then pairing operation and complex communication procedures are eliminated, but the data transmission apparatus cannot verify successful reception and must perform retransmission, reducing transmission efficiency
Solution Approach 1:
The patent applies partial action by transmitting only the necessary difference data rather than complete sensor data. The transmission apparatus calculates the difference between current sensor data and reference data, transmitting only this difference portion. This reduces the amount of data requiring retransmission while maintaining the ability to reconstruct complete information at the reception end, thus improving transmission efficiency without requiring complex verification protocols.
Solution Approach 2:
The patent changes the parameter representation from absolute sensor data values to difference values relative to a reference. By transforming the data from its original form (complete sensor readings) to a transformed form (differences from reference), the transmission requires fewer bits while preserving the ability to recover the original information through simple addition at the reception end.
2Quantity of substance
If the capacity of transmission data is reduced to compensate for retransmission, then packet size is minimized, but the number of bits allocated for sensor data must be limited
Solution Approach 1:
The patent segments the sensor data transmission into two parts: reference data (transmitted separately or pre-established) and difference data (transmitted in the minimized packet). This segmentation allows the main packet to contain only the essential variation information, reducing its size while the complete information can be reconstructed by combining the reference with the difference values at the reception end.
Solution Approach 2:
The patent performs preliminary action by establishing reference data before the main transmission sequence. The reference data serves as a baseline that is either transmitted in advance or pre-synchronized between devices. This preliminary establishment of reference information enables subsequent transmissions to focus only on changes, minimizing packet size while preserving complete information through the combination of reference and difference data.
Data Source
AI summary
According to the first aspect of the present invention, a data transmission apparatus includes a transmission control unit which generates a packet for one-way communication including first difference sensor data, and a transmission unit which transmits the generated packet. The first difference sensor data is a difference between first sensor data measured by a sensor and a reference value associated with the first sensor data.