Human body communication device, human body communication system and method using the same
First Claim
1. A human body communication apparatus comprising:
- an electrode for transmitting/receiving a signal in the form of a current through a human body while being in contact with the human body;
a preamplifier for amplifying the signal received through the electrode;
a band-pass filter for removing noise included in the signal amplified by the preamplifier;
a comparator for comparing the filtered signal with a reference voltage; and
a controller for restoring the signal output from the comparator and generating a base-band signal to be transmitted to the electrode, wherein the controller generates the base-band signal by a pulse coding modulation.
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Abstract
A human body communication apparatus, a human body communication system, and a method using the same are provided. The communication apparatus is directly in contact with a human body and allows a small amount of current including a data signal to flow through the body so that information is communicated through the human body. In order to efficiently perform a data communication by preventing a collision of data packets in the human body communication system, one communication apparatus is selected from a plurality of communication apparatuses configuring the human body communication system to control or manage a communication order for other communication apparatuses and the respective apparatuses check whether the respective communication apparatuses transmit data through the human body to try a communication.
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Citations
21 Claims
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1. A human body communication apparatus comprising:
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an electrode for transmitting/receiving a signal in the form of a current through a human body while being in contact with the human body;
a preamplifier for amplifying the signal received through the electrode;
a band-pass filter for removing noise included in the signal amplified by the preamplifier;
a comparator for comparing the filtered signal with a reference voltage; and
a controller for restoring the signal output from the comparator and generating a base-band signal to be transmitted to the electrode, wherein the controller generates the base-band signal by a pulse coding modulation.
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2. A human body communication system comprising:
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a plurality of communication apparatuses for transmitting/receiving a base-band signal while being in contact with a human body; and
a plurality of hosts having an operation performance, and coupled with the respective communication apparatuses, wherein one communication apparatus (a master member) controls a data transmission for a plurality of other communication apparatuses (slave members). - View Dependent Claims (3, 4, 5, 6, 7)
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8. A human body communication system comprising:
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a plurality of communication apparatuses for transmitting/receiving a base-band signal while being in contact with a human body; and
a plurality of hosts having an operation performance and coupledwith the respective communication apparatuses, wherein the respective communication apparatuses broadcast an information request message to a plurality of other communication apparatuses when there is no signal transmitted through the human body. - View Dependent Claims (9)
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10. A human body communication method for transmitting/receiving data in the form of a base-band signal through a human body wherein a plurality of communication apparatuses are in contact with the human body via an electrode and are respectively coupled with hosts configuring a network, the human body communication method comprising:
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broadcasting an information request message from one communication apparatus (a master member) to other communication apparatuses (slave members) through the electrode;
receiving a response message from the slave members that received the request message;
configuring a member table of the slave members based on the received response messages in a network; and
broadcasting information of the member table. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A human body communication method for transmitting/receiving data in the form of a base-band signal through a human body, wherein a plurality of communication apparatuses are in contact with the human body via an electrode and are respectively coupled with hosts to configure a network, the method comprising:
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monitoring whether the respective communication apparatuses perform a data transmission through the human body;
broadcasting an communication apparatus information notifying message from the one communication apparatus to other communication apparatuses when the data transmission is in an idle state;
receiving the response message from the other communication apparatuses that received the broadcast message;
configuring a member table based on the received response messages in a network; and
determining a communication order for the other communication apparatuses based on the member table to start a data communication. - View Dependent Claims (20, 21)
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Specification