2. Introduction to HAN Human Area Networking is a technology that safely turns the surface of the human body into a data transmission path at speeds up to 10 Mbps between Any two points on the body. Human body is surrounded by a minute electric field Data travels across the body’s natural electric field A circuit is created when a person touches a object
3. History of HAN • The concept of intra-body communication was first proposed by IBM in 1996. • This communication mechanism was later evaluated and reported by several research groups around the world. • All those reported technologies had two limitations
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6. What is Red Tacton ? TACTON “touch-act-on” Meaning “action triggered by touching”. RED It is an auspicious color according to Japanese culture
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8. RedTacton transceiver Above figure shows a photograph of the RedTacton transceiver connected to a PDA and block diagram shows the RedTacton transceiver developed by NTT.
12. Mechanism of Communication 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 laser beam.
15. 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
16. Broadband & Interactive Communication speed can deteriorate in crowded spaces due to a lack of bandwidth in the case of Wireless LAN but in RedTacton, device drivers can be downloaded instantly and executable programs can be quickly sent.
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24. Evaluation criteria Wireless LAN Infrared RedTacton Transfer speed (Can DVD-quality images be sent?) E P E Performance deterioration during periods of congestion (Simultaneous use by many people in small spaces) P E E Duplex data transfer (Interactive processing) E E E
