RedTacton

FAQ

	What does the name "RedTacton" mean?

	We created the word, "Tacton" because with this technology, communication starts by touching (Touch), leading to various actions (Act on). We then added the color red to convey the meaning of warmth in communication. Combining these phrases led to the name, "RedTacton".

	How does RedTacton differ from other communication systems that use the human body?

	Several "human body communication" technologies using the human body as a transmission medium have been reported in the past. But RedTacton employs a proprietary electric field/photonics method, which surpasses the other methods in terms of communication distance, transfer speed, and interactivity.

	What is the Super-sensitive electric field sensing technology used in RedTacton like?

	In security devices, transistors serve as sensors, and the electrode structure is designed to perform virtual differential detection. For communication devices, photonic electric field sensors are used. Using laser beams, they detect fluctuations in the optical properties of electro-optic crystals due to surrounding electric fields.

	Does RedTacton cause a weak shock, such as those caused by static electricity?

	In the case of static electric, a sudden flow of weak current into the body from the outside causes the crackling sensation. RedTacton’s electrodes are covered with an insulating material, so no electric shock occurs.

	In addition to directly touching parts of the body, is it possible, say, for a PC on the floor to communicate through the user's shoes and socks with a mobile terminal he is holding or to communicate with a mobile terminal through one's clothing? Also, what happens if gloves are worn when holding the mobile terminal?

	Communication is done by using an electric field induced on the surface of the body. Communication is thus possible even when the user is wearing shoes. Communication is also possible through clothing, but the communication becomes unstable the farther away from the body it occurs. When we tested the system with rubber gloves, communication was possible with no problems.

	Is communication possible near microwave ovens, wireless LANs, Bluetooth equipment, and other devices that create noise or use wireless technology?

	RedTacton’s communication bandwidth differs from those of other wireless methods, so there is no interference with other wireless equipment. However, communication may not be possible in circumstances where a source regularly produces noise that includes frequencies used by RedTacton’s bandwidth.

	Is communication more difficult with dry or oily skin? Does the ease of communication vary according to the user?

	Noticeable differences were not detected in our tests.

	Can multiple RedTacton transceivers be used simultaneously?

	RedTacton’s communication bandwidth differs from those of other wireless methods, so there is no interference with other wireless equipment. However, communication may not be possible in circumstances where a source regularly produces noise that includes frequencies used by RedTacton’s bandwidth.

	Can communications be tapped by others?

	The upper layer protocols have not been specified in the RedTacton system. .So highly secure communication is possible by combining the system with encryption and other procedures.

	What type of signal is used for communication.

	An electric field signal.

	What media is the easiest for communication?

	The surface of metals and other highly conductive materials are the easiest for communication, but communication is also possible on the surface of the human body, which is a quasi-conductor. Furthermore, signals can pass through thin glass windows, flooring, and other materials considered to be conductors using the same principle as a capacitor. However, in such cases the communication distance is just a few centimeters.

	What is the soft interface for the prototype terminal?

	The host can be connected by Ethernet or serial interface.

	Are other hardware forms possible beside the prototype?

	By customizing the interface, we believe it is possible to embed RedTacton into various terminal devices, such as mobile phones.

	What is the status of patents for RedTacton?

	NTT alone has applied for and been granted the basic patent both in Japan and abroad. About 300 patents for circuits, sensors, and applications are under application.

	How will the commercialization of RedTacton proceed from here on?

	We plan to commercialize RedTacton by using NTT's Comprehensive Producer Function, an initiative started by NTT in July 2003 to innovate R&D management to overcome the "Valley of Death," which lies between R&D activities and the conversion of their results into business applications. Under the Comprehensive Producer Function, a Producer is appointed to take charge of converting R&D results into commercial products or services in cooperation with various parties both within and outside the NTT Group. Leveraging the comprehensive producer function program, NTT is committed to quickly identifying and opening up various application areas where RedTacton shows the most commercial promise.