Richa.V.Upadhyay*, Sourabh Banik#
#Computer Engineering Department , Third Year
Godavari College Of Engineering
Abstract— Human society is entering an era of ubiquitous computing, where everything is networked. For the implementation of these ubiquitous services, Human Area Network Technology(or RedTacton) is important for communication between mobile terminals and between terminals that are embedded in the environment. Technology for solving problems like packet collisions, routing cables and unwanted signal interruptions includes the use of person's body as a signal path for communication. A transmission path is formed automatically when a person comes into contact with a RedTacton enabled device, and communication between mobile terminals begins. The principle is based on the properties of Electro-Optic Crystal which varies even due to a minute change in the weak electric field around human body or some other dielectric material. The sender sends a coded signal by varying the weak electric field around the human body the receiver on the other side consists of an electro-optic crystal and laser which detect and decodes the signal and convert it back into the original message. This technique is called Electric Field Photonics. Focusing on the naturalness, inevitability, and sense of security conveyed by touching in everyday life, in this paper, we tried to described how human area networking technology enables us to communicate just by touching and how to use the surface of the human body as a safe and high speed network transmission path. We have also discussed some of the application fields where we can use human area network and its advantages and unique features compared to the Bluetooth or other radio frequency technology devices like RFID.
Keywords— HAN, Electro-optic Crystal, Red Tacton, Laser Beam, Photoelectric I. Introduction
The name REDTACTON has derived from Japanese word where Tacton means “action triggered by touching” and in Japanese culture the colour red signifies warmth and love, to convey cordiality and warmth of interpersonal communication. This technology is developed by a Japanese company Nippon Telegraph and Telephone corporation or in short NTT Laboratory. In this paper we will discuss about RedTacton, its working states and application of RedTacton in various fields. Also we will come to know about advantages, disadvantages, applications, amazing features and future developments in this technology. And we are also going to compare RedTacton technology with several other technologies for data transmission.
Figure 1: It explains some basic functions of redtacton
II. Working Principle
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 .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. 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.