Human Body Communication Channel Segmentation for Wireless Interference
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Solution Overview
Problem
Human body communication systems face inefficiencies due to the 'human body antenna effect,' where wireless communication is inadvertently triggered instead of human body communication, especially with high frequency bands, leading to incorrect data transmission and increased power consumption.
Innovation Solution
The system employs a method to differentiate between synchronous and data channels by using a lower frequency as the synchronous channel and a higher frequency as the data channel, allowing for accurate discrimination and efficient data transmission only during human body contact, thereby reducing wireless data transmission and improving performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If a contact detector is provided to minimize power consumption during stand-by state, then power consumption is reduced, but wireless communication is inadvertently triggered instead of human body communication due to human body antenna effect
Solution Approach 1:
The communication channel is segmented into two distinct frequency bands: synchronous channel (lower frequency) and data channel (higher frequency). This segmentation allows the system to first establish contact through the synchronous channel, then proceed to data transmission through the data channel only when genuine human body contact is confirmed, preventing false wireless communication triggers.
Solution Approach 2:
The synchronous channel acts as an intermediary between contact detection and data transmission. It serves as a verification step that mediates whether the system should proceed to full data communication, filtering out false positives from the human body antenna effect while allowing genuine contact to progress to data transmission.
2Speed
If high frequency band is used to achieve high speed transmission, then transmission speed is improved, but human body antenna effect becomes serious causing incorrect communication
Solution Approach 1:
The frequency spectrum is segmented into two functional bands: lower frequency synchronous channel for contact verification and higher frequency data channel for high-speed transmission. This allows the system to benefit from high frequency speed advantages while using lower frequency to avoid antenna effects during the critical contact detection phase.
Solution Approach 2:
The system performs preliminary communication verification through the synchronous channel before activating high-speed data transmission on the data channel. This preliminary action at lower frequency prevents the harmful antenna effect from triggering incorrect high-speed communication, ensuring that high frequency is only used when genuine contact is established.
3Device complexity
If contact detection is made without frequency differentiation, then simple detection is achieved, but wireless communication is performed instead of human body communication under circumstances where wireless communication is possible
Solution Approach 1:
The detection process is segmented into two stages using frequency differentiation: first detecting contact through the synchronous channel at lower frequency, then confirming and proceeding with data transmission through the data channel at higher frequency. This dual-stage frequency-based detection maintains relatively simple device structure while significantly improving communication reliability by preventing false wireless transmission.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables high-speed data transmission exclusively through the human body, even in environments where wireless transmission is possible, reducing power consumption and eliminating incorrect wireless communication, thus enhancing the overall performance of human body communication systems.
Implementation Method 1
a technique for transmitting/receiving data using a human body as a medium of electrical signal transfer has been suggested
Implementation Method 2
due to a human body antenna effect, a communication process is performed by only detection of a human body contact
Data Source
AI summary
An apparatus and a method for reducing wireless data transmission in a personal area network is configured to generate and transmit a packet including information discriminating between a synchronous channel and a data channel. The apparatus and method discriminate between the synchronous channel and data channel when receiving a packet in order to improve data transmission performance of a human body communication system. The apparatus and the method use a transmission channel whose frequency is lower than an antenna frequency as a synchronous channel, and use a transmission channel whose frequency is higher than the antenna frequency as a data channel.