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RedTacton An innovative Human Area Networking technology
#16
i jszz wanted to read d RFC of dis technology .so plzz fwrd me d rfc no of dis.
regards neeti
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#17
hi
i need this document "redtacton" for my seminar
please send this to my ID gururaj.evionics[at]gmail.com.
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#18

.ppt   redtactonV.ppt (Size: 857 KB / Downloads: 105)
REDTACTON FULL PRESENTATION
Introduction
 Technology is making many things easier.
 Red Tacton is a new human area network technology.
• It gives us safe and high speed network transmission
Definition
“Red Tacton is a new Human Area Networking technology that uses the surface of the human body as a safe, high speed network transmission path. Red Tacton uses the minute electric field emitted on the surface of the human body”.
Working Principle:
Red Tacton relies upon the principle that the optical properties of an electro-optic crystal can vary according to the changes of a weak electric field
Human Area Network:
 In addition to the WANs (Internet) and LANs, there are applications best served by Human Area Networks (HANs) that connect the last meter
 Human society is entering an era of ubiquitous computing, where everything is networked
TOUCH
 Touching, gripping, sitting, walking, stepping and other human movements can be the triggers for unlocking or locking, starting or stopping equipment, or obtaining data
BROADBAND & INTERACTIVE
Drivers can be downloaded instantly and execute programs can be sent.
ANY MEDIA
In addition to the human body, various conductors and dielectrics can be used as transmission media. Conductors and dielectrics may also be used in combination
ADVANTAGES:
 Wired communication transmits data between two connection points, so interception is difficult and security can’t be assured.
 Taking the above point in account, RedTacton allows for easy connection without connectors, while at the same time allowing transmission of data only between two contact points.
 Equipment involved in RedTacton are small in size and portable.
Conclusion:
 We conclude that, when we compare Red Tacton with other technology present today it can give a better performance over others
 And we can say that to connect the network with in short distances Red Tacton is best.
 In this technology there is no problem of hackers as our body is itself a media
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#19

.ppt   redtacton.ppt (Size: 2.1 MB / Downloads: 137)
INTRODUCTION
 Red Tacton is a new Human Area networking technology that uses the surface of the human body as a safe, high speed network transmission path.
 Red Tacton uses the minute electric field generated by human body as medium for transmitting the data
GENEREL TRANSMISSION
 The chips which will be embedded in various devices contain transmitter and receiver built to send and accept data in digital format
 All these devices need the separate voltages for their working
 Along with power they need a medium
ABOUT REDTACTON
 Red Tacton uses the minute electric field emitted on the surface of the human body. Technically
 A transmission path is formed at the moment a part of the human body comes in contact with a RedTacton TRANCEIVER
AN OVERVIEW OF REDTACTON
 Physically separating ends the contact and thus ends communication Using RedTacton
OVERVIEW
 Using Red Tacton, communication starts when terminals carried by the user or embedded in devices
 They linked in various combinations according to the user's Communication is possible using any body surfaces
 The body surfaces may be any of our body parts like hands, fingers, arms, feet, face, legs
WORKING PRINCIPLE
DISCRIPTION OF FIELDS
WORKING OF ELEMENTS

 RedTacton can achieve duplex communication over the human body at a maximum seed of 10 mbps
 RedTacton uses SUPER SENSETIVE PHOTONIC electric field sensor to achieve the above
OTHER ELEMENTS
 The RedTacton transmitter induces a weak electric field on the surface of the body.
 The RedTacton receiver senses changes in the weak electric field on the surface of the body caused by the transmitter
MAIN PRINCIPLE
 RedTacton relies upon the principle that the optical properties of an electro-optic crystal can vary according to the changes of a weak electric field.
 RedTacton detects changes in the optical properties of an electro-optic crystal using a laser and converts the result to an electrical signal in a optical receiver circuit
TRANSMISSION IN REDTACTON
 The transmitter sends data by inducing fluctuations in the minute electric field
 These fluctuations disturbs the minute electric field on the surface of the body

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#20
Presented by:
Ch.Jyothsna


.pptx   RED TACTON.pptx (Size: 764.14 KB / Downloads: 197)
INTRODUCTION
Red Tacton is a technology developed by Japanese company NTT, which claims it can send data over the surface of the skin at speeds of upto 10Mbps--- equivalent to a fast broadband data connection.
It takes a different technical approach.Instead of relying on electromagnetic waves or light waves to carry data ,it uses weak electric fields on the surface of the body as a transmission medium.
The name chosen for this technology is derived from “Tacton” meaning “action triggered by touching” combined with red ,which in Japanese culture is an auspicious colour with connotations of warmth and love,to convey the cordiality and warmth of interpersonal communications.
Human Area Network
What is Red Tacton?

Red Tacton is a new human area networking technology that uses the surface of the human body as a safe, high speed network transmission path.
General Theory
Types Of Red Tacton Transceivers
Principle
Red Tacton relies upon the principle that
the optical properties of an electro-optic crystal can vary according to the changes of a weak electric field.
How Red Tacton works?
Mechanism of Communication
Features
Continued… Touch:
Continued… Broadband And Interactive:
Application Fields
An alaram sounds automatically to avoid accidental medicine ingestion.
Touch advertising and receive information.
Touch a printer to print.
Instantaneous private network via personal handshake.
Just touching a phone makes it your own.
Just sitting in the seat triggers the car to load all its presets,just the way you like.
Connect to the network just by putting lap-top on the table.
Wireless headset.
User verification and unlocking with just a touch.
Comparison
Pros And Cons
Pros:
Data transfer is faster and easier.
Data loss during transfer is less.
Use of minimum amount of power.
Security is more than in Blue tooth.
Superior than infrared and Wi-Fi technologies.
Cons:
Used within few centimeters only.
Too costly.
Future Scope
Reduction in size to be embedded in
other communication devices.
Artificial Intelligence in Red Tacton.
Conclusion:
We conclude that, when we compare Red Tacton with other technology present today it can give a better performance over others and we can say that to connect the network with in short distances Red Tacton is best.
In this technology there is no problem of hackers as our body is itself a media.

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#21
presented by:
MADHURIMA GUPTA


.pptx   final ppt. on HAN.pptx (Size: 668.3 KB / Downloads: 102)
Introduction
Defenition :-

“Red Tacton is a new Human Area Networking technology that uses the surface of the human body as a safe, high speed network transmission path. Red Tacton uses the minute electric field emitted on the surface of the human body”.
• These chips that will be embedded in various devices contain transmitter and receiver built to send and accept data in digital format. The chips can take any type of file such as mp3 music file or mail
and convert it in to the format that takes the form of digitals pulse that can be passed and read through a human being electric field . the chip in receiver devices reads these tiny changes and convert the file back into its original form.
• A transmission path is formed at the moment a part of the human body comes in contact with a Red Tacton transceiver.
• Physically separating ends the contact and thus ends communication.
• Working
• Features
• Touch
• The people can connect to the network without experiencing any degree of complexity simply by performing natural actions such as touching, sitting or stepping on other objects.
• BROADBAND & INTERACTIVE
• PROTOTYPES
Applications
Fields:-

• Touch a Printer to Print
• An Alarm Sounds automatically to Avoid Accidental Medicine Ingestion
• Instantaneous Private Network via Personal Handshake
• User Verification & Unlocking by just a Touch
Personalization of Mobile Phones
• Automatic Access Log for Confidential Document Storage
Advantages:-
1- Advantages over past Bluetooth, IRDA(Infrared comm.), RFID(Radio Frequency ID system) & other technologies who have been proposed to solve the “Last Meter” connectivity problem.
2- Communication path by just a Simple Touch thus eliminating use of hectic arrangements of wires.
• 3- RedTacton does not require the electrode be in Direct Contact with the skin
3- Very secure Data Transmission since medium is individual body
5- Transmission speed does not deteriorate in congested areas where many people are communicating at the same time.
Disadvantages:-
• Very high Initial Cost.
• High Sensitivity of Receiver is required.
• Complexity in Design.
Conclusion
• The application of Red Tacton are enormous, medical security, communication & data transfer are just a start.
• In future this technology can make the complete extinction of the key and ID cards as we know today.
• Although this technology employs a weak A.C. electric field, it easily satisfies the standards for weak Tx, Rx & protective guidelines.
• It has been concluded that Red Tacton when compared with other Technologies present today can give better performance over others.
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#22
i want thefull report on RedTacton Human Area Networking technology please send as soon as possible
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#23
i want full report on RedTacton An innovative Human Area Networking technology
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#24
Please go through all the 5 pages of the thread. The report anf ppt are posted in these pages
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#25

.doc   ADVANCED COMMUNICATION REDTACTON Presentation.doc (Size: 169 KB / Downloads: 71)
Abstract
RedTacton is a human area network technology that uses the surface of the human body as a safe high-speed network transmission path. The technology is called TACTON because this influences communication that starts by touching leading to various actions. RED is used to convey the meaning of warmth in communication. Instead of relying on electromagnetic waves or light waves to carry data, a RedTacton transmitter couples with extremely weak electric fields on the surface of the body. The weak electric fields pass through the body to a RedTacton receiver, where the weak electric fields affect the optical properties of an electro-optic crystal. Physically separating ends the contact and thus closes the communication. The RedTacton chips will be embedded in machines and contain a transmitter and receiver built to send and accept any form of data stored in digital format.
WORKING PRINCIPLE:
1. How Red Tacton works?
Using a new super-sensitive photonic electric field sensor, RedTacton can achieve duplex communication over the human body at a maximum speed of 10 Mbps.
1. The RedTacton transmitter induces a weak electric field on the surface of the body.
2. The RedTacton receiver senses changes in the weak electric field on the surface of the body caused by the transmitter.
3. RedTacton relies upon the principle that the optical properties of electro-optical crystal can vary according to changes of a weak electric field.
4.Redtacton detects changes in the optical properties of an electro-optic crystal using a laser and converts the result to an electric signal in an optical receiver circuit.
It is to be noted that Redaction transceivers which integrate transmitter and receivers, are also available. The physical layer enables half-duplex communication(transmission and reception are done alternatively)using proprietary CSMA/CD protocol. As with Ethernet cards, each transceiver card has a unique address. The upper layer above this is compliant with TCP/IP protocol.
2.Method of communication with RedTacton
The transmitter sends data by inducing fluctuations in the minute electric field on the surface of the human body. The surface of the human body loses some field due to the returning to ground and electric field dissipated to the earth from legs. Data is received using a photonic electric field sensor that combines an electro-optic crystal and a laser light to detect fluctuations in the minute electric field. This sensor measures faint electric field by using a laser beam to detect fluctuations in the optical properties of electro-optic crystal that are caused by peripheral electric fields.
The illustration is as shown in the figure. It clearly depicts various paths of the field.
the crackling sensation one feels when shocked by static electricity is caused by an electric current of several dozen milli-amperes suddenly flowing into the body from the outside. The RedTacton electrode is covered with an insulating material, no current flows into the body from the RedTacton transceiver. As a result, there is no shock caused by the inflow of electric current from the outside. However, as in mobile phones, a weak induction current is created in the body owing to the minute electric filed created near the body when the movement occurs. This induction current is very weak and similar to those occurring in everyday life. The size of the induction current emitted on the body with RedTacton is in conformity with the "Radio Frequency-Exposure Protection Standard <RCR STD-38> established by the Association of Radio Industries and Businesses (ARIB).
Downloading files via flesh
RedTacton uses the human body as a path for the electric signals that are communicated to represent data. The transmitter worn on a body uses the body’s electrical field to transmit digital messages. For example, by shaking hands two people can exchange business cards. When a user touches a door handle, the system realizes who the person is and gives the authorization. By holding a camera in one hand and touching the printer with the other the photographs can be printed. By touching a mobile phone, the address book can be downloaded. However, a distinction between an electric sensor and a photonic electric field sensor is also illustrated. Photonic electric field sensors used in RedTacton can measure stand-alone contacts without being influenced by grounds. As a result, the received waveform is not distorted, regardless of the receiver location. This makes long-distance and high-speed body surface transmission possible.
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#26
Brilliant work guys..Superb topic Smile Relatively very new concept..Absolutely amazing..Hats of to the people who posted this article..Big Grin
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#27
RED TACTON ( Human Area Network).
ABSTRACT

Technology is making many things easier; I can say that our concept is standing example for that. So far we have seen LAN, MAN, WAN, INTERNET & many more but here is new concept of “ RED TACTON ” which makes the human body as a communication network by name .. HAN (Human Area Network).
NTT lab from Japan is currently testing & developing this revolutionary technology .RedTacton is a new Human Area networking technology that uses the surface of the human body as a safe, high speed network transmission path. Red Tacton uses the minute electric field generated by human body as medium for transmitting the data. The chips which will be embedded in various devices contain transmitter and receiver built to send and accept data in digital format. The human body shunts most of electricity to ground resulting in weak electric field that can be modulated to carry signals. As the receiver is located on the part of the body, the components of a hands free handset or in an acquaintance PDA as it senses modulation in the electric field the receiver decodes them to recover the data. . Human Area Network is an important over current wireless technologies such as Bluetooth because users can narrowly limit signal recipients rather than broadcasting to all devices within given range.
In this paper we will discuss about red tacton, and its working States, and Applications of red tacton various fields. And we will compare our red tacton with the Other technology for data transmission. And know about human area network.
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#28

.doc   RedTacton.doc (Size: 41.5 KB / Downloads: 60)
RedTacton
RedTacton is a Human Area Networking technology, which is under development, that uses the surface of the human body as a safe, high speed network transmission path. It is completely distinct from wireless and infrared technologies as it uses the minute electric field emitted on the surface of the human body.
A transmission path is formed at the moment a part of the human body comes in contact with a RedTacton transceiver. Communication is possible using any body surfaces, such as the hands, fingers, arms, feet, face, legs or torso. RedTacton works through shoes and clothing as well. When the physical contact gets separated, the communication is ended.
Using RedTacton-enabled devices, music from a digital audio player in your pocket would pass through your clothing and shoot over your body to headphones in your ears. Instead of fiddling around with a cable to connect your digital camera to your computer, you could transfer pictures just by touching the PC while the camera is around your neck. And since data can pass from one body to another, you could also exchange electronic business cards by shaking hands, trade music files by dancing cheek to cheek, or swap phone numbers just by kissing.
Features
RedTacton has three main functional features:
 Touch - Touching, gripping, sitting, walking, stepping and other human movements can be the triggers for unlocking or locking, starting or stopping equipment, or obtaining data.
 Broadband and Interactive - Duplex, interactive communication is possible at a maximum speed of 10Mbps. Because the transmission path is on the surface of the body, transmission speed does not deteriorate in congested areas where many people are communicating at the same time.
 Any media - In addition to the human body, various conductors and dielectrics can be used as transmission media. Conductors and dielectrics may also be used in combination.
Comparison with other network technologies
The focus on ubiquitous service has brought about the shortening of distances in communication. RedTacton is positioned as the last 1m solution to ultimate close-range communication. Wireless communication creates connections when signals arrive, allowing for easy connections because connectors are unnecessary. However, seen from another aspect, the arriving signals can be intercepted, so security becomes an issue. Wired communication transmits data between two connection points, so interception is difficult and security can be considered to be high. However, connectors and cables are a nuisance. Taking the above points in account, RedTacton is situated directly between wireless and wired communication.
ABSTRACT:-
Technology is making many things easier; I can say that our concept is standing
example for that. So far we have seen LAN, MAN, WAN, INTERNET & many more
but here is new concept of “ RED TACTON ” which makes the human body as a
communication network by name .. HAN (Human Area Network).
NTT lab from Japan is currently testing & developing this
revolutionary technology .RedTacton is a new Human Area networking technology that
uses the surface of the human body as a safe, high speed network transmission path. Red
Tacton uses the minute electric field generated by human body as medium for
transmitting the data. The chips which will be embedded in various devices contain
transmitter and receiver built to send and accept data in digital format.
REDTACTON:-
Red Tacton is a new Human Area Networking technology that uses the surface of the human body as a safe, high speed network transmission path. Red Tacton uses the minute electric field emitted on the surface of the human body. Technically, it is completely distinct from wireless and infrared .A transmission path is formed at the moment a part of the human body comes in contact with a Red Tacton transceiver. Physically separating ends the contact and thus ends communication Using Red Tacton, communication starts when terminals carried by the user or embedded in devices are linked in various combinations according to the user's Communication is possible using any body surfaces, such as the hands, fingers, arms, feet, face, legs or torso. Red Tacton works natural, physical movements.
Working principle :-
Using a new super-sensitive photonic electric field sensor, Red Tacton can
achieve duplex communication over the human body at a maximum speed of 10 mbps The Red Tacton transmitter induces a weak electric field on the surface of the body. The Red Tacton receiver senses changes in the weak electric field on the surface of the body caused by the transmitter .Red tacton relies upon the principle that the optical properties of an electro-optic crystal can vary according to the changes of a weak electric field. Red Tacton detects changes in the optical properties of an electro-optic crystal using a laser and converts the result to an electrical signal in a optical receiver circuit. The transmitter sends data by inducing fluctuations in the minute electric field on the surface of the human body. Data is received using a photonic electric field sensor that combines an electro-optic crystal and a laser light to detect fluctuations in the minute electric field.
The naturally occurring electric field induced on the surface of the human
body dissipates into the earth. Therefore, this electric field is exceptionally faint and unstable. The photonic electric field sensor developed by NTT enables weak electric fields to be measured by detecting changes in the optical properties of an electro-optic crystal with a laser beam.
FEATURES:-
1. TOUCH:-

Touching, gripping, sitting, walking, stepping and other human movements can be the triggers for unlocking or locking, starting or stopping equipment, or obtaining data. using Red Tacton, communication starts when terminals carried by the user or embedded in devices are linked in various combinations through physical contact according to the human's natural movements.
2.BROADBAND & INTERACTIVE
Duplex, interactive communication is possible at a maximum speed of 10Mbps. Because the transmission path is on the surface of the body, transmission speed does not deteriorate in congested areas where many people are communicating at the same time .Taking advantage of this speed, device drivers can be downloaded instantly and execute programs can be sent.
3.ANY MEDIA
In addition to the human body, various conductors and dielectrics can be used as transmission media. Conductors and dielectrics may also be used in combination.
DI ELETRICS CONDUCTORS
(Signals pass through materials) (Signals travel along surface)
A communication environment can be created easily and at low-cost by using items close at hand, such as desks, walls, and metal objects. But there is one limitation on
the length of the conductor to be propagated, on installation locations, and on the thickness of the dielectric to be passed through.
Application fields
Many application using Red Tacton are introduced. Some are:
• An alarm sound automatically to avoid accidental medicine ingestion: -Red tacton devices embedded medicine bottles transmit information on the medicines' attributes. If the user touches the wrong medicine, an alarm will trigger on the terminal he is carrying. The alarm sounds only if the user actually touches the medicine bottle, reducing false alarms common with passive wireless ID tags, which can trigger simply by proximity.
• Touch advertising and receive information: - When a consumer stands in front of an advertising panel, advertising and information matching his or her attributes is automatically displayed. By touching or standing in front of items they are interested in, consumers can get more in-depth information.
• Touch a printer to print: -Print out where you want just by touching the desired printer with one hand and a PC or digital camera with the other hand to make the link Complicated configurations are reduced by downloading device drivers "at first touch".
• Instantaneous private network via personal handshake: -By shaking hands, personal profile data can be exchanged between mobile terminals on the users. (Electronic exchange of business cards) Communication can be kept private using authentication and encryption technologies
• Just touching a phone makes it your own: -Your own phone number is allocated and billing commences. Automatic importing of personal address book and call history.
• Just sitting on the seat triggers the car to load all its presets, just the way you like: -The seat position and steering wheel height adjust to match the driver just by sitting in the car. The driver's home is set as the destination in the car navigation system .The stereo plays the driver's favorite song…
• Connect to the network just by putting a laptop on the table: -An electrically conductive sheet is embedded in the table. A network connection is initiated simply by placing a lap-top on the table. Using different sheet patterns enables segmentation of the table into subnets.
• Wireless headset: -Red Tacton can carry music or video between headsets, mobile devices, mobile phones, etc. Users can listen to music from a Red Tacton player simply by putting on a headset or holding a viewer.
• User verification and unlocking with just a touch: -Carrying a mobile RedTacton-capable device in one's pocket, ID is verified and the door unlocked when the user holds the doorknob normally. Secure lock administration is possible by combining personal verification tools such as fingerprint ID or other biometric in the mobile terminal.
System safety:-
• No current flowing into the human body from redtacton devices: -RedTacton uses the electric field that occurs naturally on the surface of the human body for communication. Transmitter and receiver electrodes are covered with an insulating films. No current flows into the body from the RedTacton transceiver.
• Displacement current occurring in the body is small enough: -There is no current flowing from the RedTacton transceiver; however, the body indirectly receives a minute electric field. This causes electrons already present inside the body to move, creating a minute displacement current. This displacement current is similar to those occurring in everyday life.
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#29

.doc   RedTacton.doc (Size: 340 KB / Downloads: 67)
Abstract:
As electronic devices become smaller, lower in power requirements, and less expensive, we have begun to adorn our bodies with personal information and communication appliances. Such devices include cellular phones, personal digital assistants(pdas), pagers and many more. Currently there is no method for these devices to share data. Networking these devices can reduce functional I/O redundancies and allow new conveniences and services.
Human society is entering an era of ubiquitous computing, when networks are seamlessly interconnected. The practical implementation of ubiquitous services requires three levels of connectivity: Wide Area Networks(WAN), Local Area Networks(LAN), and Human Area Networks(HAN) for connectivity to personal information, media and communication appliances within the much smaller sphere of ordinary daily activities.
RedTacton is a break-through technology that, uses the surface of the human body as a safe, high speed network transmission path. So we, in this paper are explaining the unique new functional features and enormous potential of RedTacton as a Human Area Networking technology.
Keywords: red tacton-warmth touch, electro sensor, half duplex, electro-optical crystals.
I. INTRODUCTION
We are heading toward an electronic future where information will be accessible at our fingertips, whenever and wherever needed. Some of the computing and communication equipment required to provide this intimate and immediate access to information will be incorporated into our attire. Just as a glance at today's wristwatch saves a trip to the nearest clock, a glance at tomorrow's wristwatch will replace finding a terminal to check e-mail.
RedTacton is a new Human Area Networking technology introduced by Nippon telegraph and Telephone Corporation(NTT’s) that uses the surface of the human body as a safe, high speed network transmission path. RedTacton is a break-through technology that, for the first time, enables reliable high-speed HAN. In the past, Bluetooth, infrared communications(IrDA), radio frequency ID systems(RFID), and other technologies have been proposed to solve the "last meter" connectivity problem. However, they each have various fundamental technical limitations that constrain their usage, such as the precipitous fall-off in transmission speed in multi-user environments producing network congestion.
A. What is RedTacton.?
RedTacton was introduced by Nippon Telegraph and Telephone Corporation(NTT) who combined TACTON - “touch-act-on” Meaning “action triggered by touching” and RED - It is an auspicious color according to Japanese culture for warmth and love creating the name RedTacton. It is a technology that, uses the surface of the human body as a safe, high speed network transmission path. The study of Human Area Networking,
i.) RedTacton uses the minute electric field emitted on the surface of the human body. Technically, it is completely distinct from wireless and infrared.
ii.) A transmission path is formed at the moment a part of the human body comes in contact with a RedTacton transceiver. Physically separating ends the contact and thus ends communication.
iii.) Using RedTacton, communication starts when terminals carried by the user or embedded in devices are linked in various combinations according to the user's natural, physical movements.
iv.) Communication is possible using any body surfaces, such as the hands, fingers, arms, feet, face, legs or torso. Red Tacton works through shoes and clothing as well.
B. Features
RedTacton has three main functional features:
i.) Touch: Touching, gripping, sitting, walking, stepping and other human movements can be the triggers for unlocking or locking, starting or stopping equipment, or obtaining data.
ii.) Broadband & Interactive: Bandwidth does not deteriorate even with duplex operations and simultaneous access by many users! Duplex, interactive communication is possible at a maximum speed of 10Mbps. Because the transmission path is on the surface of the body, transmission speed does not deteriorate in congested areas where many people are communicating at the same time.
iii.) Any media: In addition to the human body, various conductors and dielectrics can be used as transmission media. Conductors and dielectrics may also be used in combination.
C. Previous Work on Electric Field Sensing
The development of the Human Area Network(HAN) grew out of a meeting between Professor Mike Hawley's Personal Information Architecture Group and Professor Neil Gershenfeld's Physics and Media Group, both at the MIT Media Laboratory. Professor Hawley's group needed a means to interconnect body-borne information appliances, and Professor Gershenfeld's group had been applying electric field sensing to position measurement.
D. RedTacton Transciever
The transmitter consists of a transmitter circuit that induces electric fields toward the body and a data sense circuit, which distinguishes transmitting and receiving modes by detecting both transmission and reception data and outputs control signals corresponding to the two modes to enable two-way communication as shown in fig1.
Implementation of receive-first half-duplex communication scheme that sends only after checking to make sure that there is no data to receive in order to avoid packet collisions.
RedTacton takes advantage of the long-overlooked electric field that surrounds the human body.
II. WORKING
RedTacton takes a different technical approach. Instead of relying on electromagnetic waves or light waves to carry data, RedTacton uses weak electric fields on the surface of the body as a transmission medium as shown in fig2.
i.) The RedTacton transmitter induces a weak electric field on the surface of the body.
ii.) The RedTacton receiver senses changes in the weak electric field on the surface of the body caused by the transmitter.
iii.) RedTacton relies upon the principle that the optical properties of an electro-optic crystal can vary according to the changes of a weak electric field.
iv.) RedTacton detects changes in the optical properties of an electro-optic crystal using a laser and converts the result to an electrical signal in a optical receiver circuit.
Multiple transceivers can be used simultaneously. This is because RedTacton uses a proprietary CSMA/CD (Carrier Sense Multiple Access with Collision Detection) protocol that allows multiple access with the same medium from multiple nodes
A. Mechanism of Communication with RedTacton
The naturally occurring electric field induced on the surface of the human body dissipates into the earth as shown in fig3. Therefore, this electric field is exceptionally faint and unstable. The photonic electric field sensor developed by NTT enables weak electric fields to be measured by detecting changes in the optical properties of an electro-optic crystal with a laser beam.
B. Human Safety
The transmitting and receiving electrodes of the RedTacton transceiver are completely covered with insulating film, so the body of the person acting as the transmission medium is completely insulated. This makes it impossible for current to flow into a person’s body from the transceiver.
When communication occurs, displacement current is generated by the electrons in the body because the body is subjected to minute electrical fields. However, such displacement currents are very common everyday occurrences to which we are all subjected.
RedTacton conforms to the “Radio frequency-exposure Protection standard (RCR STD-38)” issued by the Association of Radio Industries and Businesses (ARIB).
III. APPLICATIONS
RedTacton has wide variety of applications, some of the applications are as follows:
A. One to One Services
 Enable one-to-one services tailored to the user's situation and tastes.
 Attribute information recorded in the RedTacton device is sent to the touched objects.
 The appropriate service is provided based on the attribute information received by the RedTacton receiver.
1) Elimination of human error:
RedTacton devices embedded medicine bottles transmit information on the medicines attributes. If the user touches the wrong medicine, an alarm will trigger on the terminal he is carrying.
The alarm sounds only if the user actually touches the medicine bottle, reducing false alarms common with passive wireless ID tags, which can trigger simply by proximity.
Avoidance of risk at construction sites. (an alarm sounds if special equipment is handled by anyone other than supervisors)
2) Marketing Applications:
When a consumer stands in front of an advertising panel, advertising and information matching his or her attributes is automatically displayed.
By touching or standing in front of items they are interested in, consumers can get more in-depth information.
Inside a shop, shoppers can view related information on their mobile terminals immediately after touching a product.
B. Intuitive Operations
 Natural movements and actions are the trigger (touch).
 RedTacton transceivers embedded in two terminals can communicate not only data but also the control or configuration instructions needed to operate devices (broadband & interactive).
1) Intuitive Operations:
Print out where you want just by touching the desired printer with one hand and a PC or digital camera with the other hand to make the link.
Complicated configurations are reduced by downloading device drivers "at first touch".
Transfer songs to portable music players from notebook PCs with just a touch.
2) Instant Private Data Exchange:
By shaking hands, personal profile data can be exchanged between mobile terminals on the user.(Electronic exchange of business cards)
Communication can be kept private using authentication and encryption technologies.
Group photos taken with digital cameras are instantly transferred to individual's mobile terminal.
Diagrams written on white boards during meetings are transferred to individual's mobile terminals on the spot.
C. Personalization
 Digital lifestyle can be instantly personalized with just a touch.
 A pre-recorded configuration script can be embedded in a mobile terminal with built-in Red Tacton transceiver.
 When another device with RedTacton capabilities is touched, personalization data and configuration scripts can be downloaded automatically.
1) Personalisation of Mobile Phones:
Your own phone number is allocated and billing commences.
Automatic importing of personal address book and call history.
The PC is configured to the user's specifications simply by touching the mouse.
2) Personalisation of Automobiles:
The seat position and steering wheel height adjust to match the driver just by sitting in the car.
The driver's home is set as the destination in the car navigation system.
D. New Behaviour Pattern
 Various conductors and dielectrics can be used as RedTacton communication media and this has the potential to create new behaviour patterns. Walls and partitions can be used as communication media.
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.doc   Redtacton_reportJO.doc (Size: 426.5 KB / Downloads: 75)
1. INTRODUCTION
Human society is entering an era of ubiquitous computing, where everything is networked. The practical implementation of ubiquitous services requires three levels of connectivity: Wide Area Networks (WAN), typically via the Internet, to remotely connect all types of severs and terminals; Local Area Networks (LAN), typically via Ethernet or WiFi connectivity among all the information and communication appliances in offices and homes; and Human Area Networks (HAN) for connectivity to personal information, media and communication appliances within the much smaller sphere of ordinary daily activities-- the last one meter. RedTacton is a break-through technology that, for the first time, enables reliable high-speed HAN. In the past, Bluetooth, infrared communications (IrDA), radio frequency ID systems (RFID), and other technologies have been proposed to solve the "last meter" connectivity problem. However, they each have various fundamental technical limitations that constrain their usage, such as the precipitous fall-off in transmission speed in multi-user environments producing network congestion. "With Bluetooth, it is difficult to rein in the signal and restrict it to the device you are trying to connect to. You usually want to communicate with one particular thing, but in a busy place there could be hundreds of Bluetooth devices within range."
Furthermore, humans apparently make poor aerials, something which is "good for security because even if you encrypt data it is still possible that it could be decoded, but if you can't pick it up it can't be cracked.
1.1 BACKGROUND
At the end of 2002 the Japanese telecommunications group NTT had announced that it would develop a new data transmission technology that uses the conductive properties of the human body to exchange information between electronic devices. With RedTacton the company has now scarcely two and a half years later presented its first prototype of a Human Area Network (HAN).
The basic principle of the RedTacton concept is the creation of minute electrostatic fields that modulated by a code-giver to carry digital information are capacitively transmitted to human skin as a conductor, thence to be transmitted upon physical contact. To read out the data bits NTT makes use of a novel type of opto-electrical receiver equipped with a miniature laser whose light ray is reflected by a crystal.
At the receiving end the electrostatic fields evoked by the RedTacton sender cause the electrical field in the environment of the crystal to change, which in turn induces changes in the polarization of the reflected laser light. These changes in polarization the opto-electrical receiver interprets as data bits, which it converts into electrical signals that can be processed by a PDA, for instance.
According to NTT this technology - which can also be made to works when door handles, switches or turnstiles are touched - allows bi-directional signals to be sent at rates of up to 10 Mbit/s. The strength of the electrostatic fields evoked the company puts at but a few hundred milliwatts. Prior to the stage planned for 2006 in which the HAN technology is to be ready for the market, NTT intends to conduct a number of field tests this summer, in which it is inviting companies with an interest in the technology to participate.
Japanese company Nippon Telegraph and Telephone Corporation (NTT) claims to have developed the first viable Human Area Network (HAN) device, enabling fast data transfer between devices using the human body as a conduit.
NTT reckons this latest advance on the wireless Personal Area Network concept - dubbed RedTacton - can transmit data over the surface of the skin at up to 2Mbps. Where it differs, though, from previous offerings, is that a RedTacton-enabled device does not have to be in direct contact with the skin - only within about 20cm.
2. WHAT IS REDTACTON?
RedTacton is a new Human Area Networking technology that uses the surface of the human body as a safe, high speed networking transmission path.
RedTacton takes a different technical approach. Instead of relying on electromagnetic waves or light waves to carry data, RedTacton uses weak electric fields on the surface of the body as a transmission medium. A RedTacton uses transmitter couples with extremely weak electric fields on the surface of the body. The weak electric fields pass through the body to a RedTacton receiver, where the weak electric fields affects the optical properties of an electro-optic crystal. 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.
RedTacton uses the minute electric field emitted on the surface of the human body. Technically it is completely distinct from wireless and infrared.
A transmission path is formed at the moment a part of human body comes in contact with RedTacton transceiver. Physically separating ends the contact and thus ends communication.
Using RedTacton, communication starts when terminals carried by the user or embedded in devices are linked in various combinations according to the user’s natural, physical movement.
Communication is possible using any body surfaces, such as the hands, fingers, arms, feet, face, legs . RedTacton works through shoes and clothing as well.
The name Red Tacton was chosen for this technology because “touch-act-on” meaning “action triggered by touching”.
Red Tacton is a new Human Area Networking technology that uses the surface of the human body as a safe, high speed network transmission path. Red Tacton uses the minute electric field emitted on the surface of the human body.
Technically, it is completely distinct from wireless and infrared .A transmission path is formed at the moment a part of the human body comes in contact with a Red Tacton transceiver. Physically separating ends the contact and thus ends communication Using Red Tacton, communication starts when terminals carried by the user or embedded in devices are linked in various combinations according to the user's Communication is possible using any body surfaces, such as the hands, fingers, arms, feet, face, legs or torso. Red Tacton works natural, physical movements.
2.1 BASIC PRINCIPLE
The basic principles of redtacton are
1. The Red Tacton transmitter includes a weak electric field on surface of the body.
2. Red Tacton receiver sences changes in the weak electric field on the surface of the body caused by the transmitter.
3. Red Tacton relies upon the principle that the optical properties of an electro optic crystal can vary according to the changes of a weak electric field.
4. Red Tacton detects changes in the optical properties of an electro optic crystal using a laser and converted the result to electrical signal in an optical circuit.
The transmitting RED TACTON device changes the electric field on the surface of the body. This is senced by the electirc field sensor and the variations are given by the receiving RED TACTON device.
2.2 MECHANISM OF COMMUNICATION WITH REDTACTON
Data is received using a photonic electric field sensor that combines an electo optic crystal and a laser light to detect flutuations in the minute electric fields. The naturally occuring electric field induced on the surface of the human body dissipates into the earth. There fore this electric field is exponentially faint and unstable.
The photonic electric field sensor developed by NNT enables weak electric fields to be measured by detecting changes in the optical properties of an electro optic crystal with a laser beam.
The transmitter sends data based on fluctuations in the weak electric field induced in the body. The electric field is received using super-sensitive electric field sensing technology.
The naturally occurring electric field induced on the surface of the human body dissipates into the earth. Therefore, this electric field is exceptionally faint and unstable.
The super-sensitive electric field sensing technology measures the weak electric fields induced by the super-efficient alternating electric field induction.
2.3 RED TACTON TRANSCEIVER
Figure below shows the block diagram of a RedTacton transceiver. The signal from the interface is sent to data sence circuit and transmitter circuit. The data sence circuit sences signal and if data is present it sends control signal to transmitter which activates the transmitter circuit. The transmitter circuit varies the electric field on the surface of our body. This change in electric field is detected by the electro optic sensor. The output of the electro optic sensor is given to the detector circuit, which in turn given to the interface of the receiving RedTacton device.
3.FUNCTIONAL FEATURES
1. A communication path is created with a simple touch, automatically initating the flow of data between a body centric electronic device and a computer that is embedded in the environment. For example, two people equipped with RedTacton devices could exchange data just by shaking hands. A wide range of natural human actions grasping, sitting down, walking or standing in a particular place can be used to start a networked process.
2. Using a RedTacton electro optic sensor, two way communication is supported between any two points on the body at a throughput of upto 10 Mbps. Communication is not just confined to the surface of the body, but can travel through the users clothing to a Red Tacton device in a pocket or shoes to communicate with a RedTacton device embedded in the floor. Unlike wireless technologies, the transmission speed does not deteriorate even in the presence of large crowds of people all communicating at the same time in meeting room, auditoriums or stores. Because the body surface is the transmission path, increasing the number of connected users directly increases the available number of individual channels.
3. Red Tacton can utilize a wide range of materials as a transmission medium, as long as the material is condictive and dielectric, which includes water and other liquids, various metals, certain plastics, glass etc.
Using ordinary structures such as tables and walls that are familiar and readily available, one could easily construct a seamless communication envirnment at a very low cost using Red Tacton. (Note that constraints are imposed by the length and envirnment of the propagating conductor and by the thickness of the dielectric.)
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