Red Tacton is a new technology that uses the human body as a transmission medium for data. It works by inducing a weak electric field on the surface of the body through an electro-optic crystal and laser. This electric field can then transmit data as it passes through the body and is received by another user in contact. It provides a high-speed and interactive wireless transmission option without using cables or traditional signals. The technology was developed by NTT in Japan and allows for transmission through clothing and materials at speeds of up to 10Mbps.

1. RED TACTON
A HND TECHNOLOGY
VASANTHA PRIYAN O.P.T,11BEE52
SHIVA I,11BEE68
KUMARAGURU COLLEGE OF TECHNOLOGY,
MOB NO:9486868591
MAIL ID:vinothshiva06@gmail.com
Abstract—In this fast emerging world sharing is one of the
most important activities between individuals, be it photos,
videos, documents, songs or anything we need a medium. Using
cables is now becoming an old fashion. so the easiest medium
available is the human body. Red tacton is the latest technology
which uses the human body as an interphase to transfer data
within the body as well as between different individuals by means
of touch .
Key words—Red Tacton , HAN ,
I. INTRODUCTION
Red Tacton is the latest Human Area Networking
technology that uses the surface of the human body as a safe,
high speed network transmission path. It is completely
different from wireless and infrared technologies as it uses the
minute electric field emitted on the surface of the human body.
Tacton mean ‘Touch–act-on’ and red signifies the
warmness of the human body , here it represents the flow of
signals through the human body.
It is more effective from wireless and cabled connections
because it uses a biotic surface as transmition medium. A
transmission path is formed exactly at the moment a part of the
human body comes in contact with a Red Tacton receiver.
Communication is possible using anybody surfaces, such as the
hands, fingers, arms, feet, face or legs. Red Tacton works
through shoes and clothing as well. When the physical contact
of the body with the transmitter or the receiver gets separated,
the transmition is ended instantly.
II. ORGIN AND DEVELOPMENT
A Red tacton technology comes under the wireless
connection genesis . There are three already known network
available to everyone around the world
1:LAN(Local Area Network)
2:WAN(Wide Area Network)
3:MAN(Metropolitian Area Network)
But Red tacton technology comes under a new emerging near
area network known as HAN (Human Area Network). This
kind of technology is still under development. This has first
been introduced by a japaneese firm called NTT.although the
first proposition for this idea can from IBM in 1996 it took a
very long time for the necessary knowhow to implement the
innovative idea.
Many researchers around the world bought about
many different prototypes and ideas to implement this ever
yone of them had a couple of limitations
1. the range was limited to a very few centimetres (only
upto 40 cm was achieved )
2. the transmition speed achieveable was only 40 bits !!
This was later overcome by a Tokyo enterprise known as
Nippon Telegraph and Telephone corporation (NTT).
unlike the others they used photonic electric field
technology. In the technology used by NTT the photonic
electric fields are measured by detecting changes in an
electro optic crystal with the help of laser beams.

2. III. WORKING PRINCIPLE
A Red tacton technology is similar to any other transmitting
and receiving technology. It also has a transmitter and receiver
but it uses the human body as the communication channel
instead of any other medium. As soon as the body comes in
contact with the transceiver, the signal will start to be
transmitted. When the contact is broken the signal will also
automatically stop.
A Red Tacton transceiver consists of an optoelectronic
crystal which develops a weak electric field with the help of
lasers these are transmitter into the human body where it
couples with extremely weak electric fields on the surface of
the body. The weak electric fields pass through the body to a
Red Tacton receiver without making any harm to the body,
where the weak electric fields affect the optical properties of an
electro-optic crystal on the receiver side. The extent to which
the optical properties are changed is detected by laser light
which is then converted to an electrical signal by a detector
circuit.
IV. RED TACTON TRANSCEIVER
A Red tacton transceiver consists of two parts a receiver
side and a transmitting side, but both uses the same terminal for
receiving as well as transmitting. Like computers dividing slots
in processors to perform multitasking the transceiver also
divides the amount of data that need to be send and received
separately so that there is no collision of packet data.
The transmitting side consists of a transmitter circuit which
with the help of an optonic crystal generates the necessary
electric field to transmit the required amount of data. There is
also a detector circuit that detects the transmitting signal from
the receiving signal and avoids the collision mentioned above.
Whereas the detector circuit consists of an electro-optonic
sensor which senses the weak electric field carrying the data
from the other device and separates the data from the signal.
This circuit also consists of a detector part just like the
transmitter circuit.
In this kind of transceiver multiple transmitter circuit can
be used because like in phones this also uses CSMA (Code
Sense Multiple Access) with collision detection. Which
enables multiple signals to be sent and received
simultaneously?
The transceiver can be attached to any part of the device,
but should be kept in mind that it should be easily accessible to
the user. The transceiver can be kept anywhere in your body
meaning in can be in your hands, pocket or somewhere else but
should be in contact with the body.
V. WORKING OF RED TACTON
A human body automatically and naturally creates an
electromagnetic field which surrounds us every time but since
it is very weak it is unnoticed and is passed directly to ground
without any harm to us. The transceivers created by NTT uses
(as mentioned above) an electro-optonic crystal which makes
use of this weak electric fields for the purpose of data
transmition.

3. The diagram given above represents that describes the
working of a red tacton. The fig shows a human body
surrounded by the weak electric field represented by the red
glow. Here there are three EF’s acting Ea, Eb, and Ec &Es.
Ea. is the electric field generated by the transmitter, Be is
the electric field which is received by the transceiver , Ec is the
electric field which is dissipated back into the ground and Es is
the electric field which is received by the receiver circuit.
Clothing or any other materials or accessories like shoes, socks
etc.will not block the passage of the signal as it depends on
electric field rather than electric pulses compared to any other
medium of transmission.
The naturally occurring electric field induced on the surface of
the human body dissipates into the earth. Therefore, this
electric field is very faint and unstable. The photonic electric
field sensor developed by NTT enables the weak electric
fields to be measured by detecting changes in the optical
properties of an electro-optic crystal with the help of a laser
beam.
VI. TANSMISSION AND RECEPTION STEPS
Transmission Steps
1. The Red Tacton transmitter induces a weak electric
field on the surface of the body.
2. The Red Tacton receiver senses changes in the weak
electric field on the surface of the body caused by the
transmitter.
3. It relies on the principle that the optical properties of the
electro-optic crystal varies according to the changes in the
weak electric field.
3. It detects the changes in the optical properties of an
electro optic crystal using a laser beam and converts
the result into an electrical signal in a detector circuit.
VII. FEATURES OF HNA
Fig. 1. Features
There are three basic features that are functioning as the
base of a Human Area Network.they are
1.Touch
This forms the base of all the functionality in a tacton
based product. The touch is used for communication
between two transceivers that used for red tacton
technology.
2.Any media
This technology can be used in almost all the
mediums available is as it uses electric field it can travel
through any medium available.some examples of
conductors are metal, water ,wood ,human body etc.
3.Broadband and Interactive
This latest technology available is very interactive as
it is used in almost every wireless and networking field
with a new perspective.also NTT have achieved in
transmission of about 10Mbps speed in its prototype of
this technology.
2.Any media
This technology can be used in almost all the
mediums available is as it uses electric field it can travel
through any medium available.some examples of
conductors are metal, water ,wood ,human body etc.
3.Broadband and Interactive
This latest technology available is very interactive as
it is used in almost every wireless and networking field
with a new perspective.also NTT have achieved in
transmission of about 10Mbps speed in its prototype of
this technology.

4. VIII. FUNCTIONAL FEATURES
The red tacton gives the users many functional features
including the ones discussed above.
The first and the most important functional feature is that it
can be used to create a short distance transmition medium for
persona;
New perspective alsoNTT have achieved in transmission of
about 10MBps speed in its prototype technology
IX. FUNCTIONAL FEATURES
The red tacton has features based on its applications as well
as is says its functional features are more than what we can
number. The first and the most important feature or function is
that it can be used to create a personal transmission medium
within close range with out the use of any wires or signals.
Second important function is that the simplest of gestures like a
hand shake or sitting or walking down a signalled path can be
used to trigger the function required.
As the transmition path is the human body, even if there is
a huge croud or there is disturbancwe due to any other signal
the red tacton signal will not be deflected since it uses the body
as medium. The red tacton technology can be implemented as
long as the material is conducting or dielectric.