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Data transfer through skin by human area networking full report
Post: #1

.doc  human area network full report.doc (Size: 224.5 KB / Downloads: 540)

.ppt  Data transfer through skin by human area networking.ppt (Size: 797.5 KB / Downloads: 1959)

Human society is entering an era of ubiquitous computing, where everything is networked. For the implementation of these ubiquitous services, human area network technology for communication between mobile terminals and between terminals that are embedded in the environment has become important. Technology for solving problems like routing cables, packet collisions and unwanted signal interruptions includes the use of the person's body as a signal path for communication. A transmission path is formed automatically when a person comes into contact with a device, and communication between mobile terminals begins.

The principle based on how human area networking works is by single-point-contact measurement capability of a photonic electric field sensor that combines electro-optical crystals with laser for development of a transceiver that employs a photonic electric field sensor in the receiver. 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, I have described how human area networking technology that enables communication just by touching, how to use the surface of the human body as a safe, high speed network transmission path. I have also discussed some of the application fields we use human area network and its advantages and unique features compared to the Bluetooth or other radio frequency technology devices like RFID.

Presented By:
(Affiliated to J.N.T.University - Hyderabad)
Gandipet, Himayath Nagar, C.B Post.

Today, people can communicate with anyone, anytime and anywhere over a cellular phone network. Moreover, the Internet lets people download immense quantities of data from remotely located servers to their home computers. Essentially, these two technologies enable communications between terminals located at a distance from each other. However, user-friendly ubiquitous services involve more than just networking between remotely located terminals. Communication between electronic devices on the human body (wearable computers) and ones embedded in our everyday environments is also critical. So this has driven extensive research and development on human area networks. Wired connections between electronic devices in human area networks are cumbersome and can easily become entangled. Short-range wireless communication systems such as Bluetooth and wireless local area networks have some problems. Throughput is reduced by packet collisions in crowded spaces such as meeting rooms and auditoriums filled with people and communication is not secure because signals can be intercepted. The principle drawback of infrared communications (IrDA) is the tight directionality of beams between terminals needed for the system to be effective. The ultimate human area network solution to all these constraints of conventional technologies is intrabody communication, in which the human body serves as the transmission medium. In ubiquitous services, if we could use the human body itself as a transmission medium, then this would be an ideal way of implementing human area networks because it would solve at a stroke all the problems including throughput reduction, low security, and high network setup costs. The concept of intrabody communication is it uses the minute electric field propagated by the human body to transmit information. But receiving data is more complicated because the strength of the electric field involved is so low. This technique is called electric field photonics: A laser is passed though an electro-optic crystal, which deflects light differently according to the strength of the field across it. These deflections are measured and converted back into electrical signals to retrieve the transmitted data.
There was an excellent success with an electro-optic sensor combining an electro-optic crystal with laser light. This sensor is applied for measuring high-frequency electronic devices. The electro-optic sensor has three key features:
¢ It can measure electric fields from a device under test (DUT) without contacting it, which minimizes measurement disturbance,
¢ Ultra Wideband measurement is possible, and
¢ It supports one-point contact measurement that is independent of the ground, which is the most significant feature in the present context. This third feature is utilized to fabricate an intrabody communication receiver for its Human Area Networking technology.
Ea represents the electric field induced towards the body by the transmitterâ„¢s signal electrode. The system requires a ground close to the transmitter signal electrode, so electric field Eb induced from the body can follow a return path to the transmitter ground. Moreover, since people are usually standing on a floor or the ground, electric field Ec escapes from the body to ground, mainly from the feet.
The electric field Es thatreaches the receiver is Es = Ea “ (Eb + Ec). It couples to the electro-optic crystal and changes the crystal™s optical properties. This change is detected by laser and transformed into digital data by a detector circuit.
Ea “ Electric field induced by the transmitter.
Eb “ Electric field to the ground of the transmitter.
Ec “ Electric field dissipated into ground.
Es “ Detected electric field at the receiver.
Using a new super-sensitive photonic electric field sensor, we can achieve duplex communication over the human body at a maximum speed of 10 Mbps. The transmitter used induces a weak electric field on the surface of the body, it receiver senses changes in the weak electric field on the surface of the body caused by the transmitter. This technology relies upon the principle that the optical properties of an electro-optic crystal can vary according to the changes of a weak electric field, it also detects changes in the optical properties of an electro-optic crystal using a laser and converts the result to an electrical signal in an optical receiver circuit.
This is a photograph of the RedTacton transceiver connected to a PDA and a block diagram of the RedTacton transceiver.
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. We implemented a 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 between terminals in compliance with the IEEE 802.3 protocol. The receiver consists of an electro-optic sensor and a detector circuit that amplifies the minute incoming signal from the electro optic sensor and converts it to electrical signal. We conducted a series of trials in which data was sent through human bodies using RedTacton transceivers.
Setting up two sets of transceivers, each connected to a PDA. The subject held one transmitting/-receiving electrode in each hand. The bit error rate of signals sent through the body was quantitatively measured.
The results showed that the system has no significant practical problems at a transmission speed of 10Mbit/s. Besides communication between two hands, thereby communication between a foot and finger and between other parts on the personâ„¢s body is also reliable and proved.
It has also been verified that good communication was achieved not only when the electrodes were in direct contact with the personâ„¢s skin, but also when the signals passed through clothing and shoes.
We have to know the effects of this technology on human health, which is obviously an important issue. The transmitting and receiving electrodes of the 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 personâ„¢s body from the transceiver. When communication occurs, the electrons in the body generate displacement current because the body is subjected to minute electrical fields.
However, such displacement currents are very common in everyday occurrences to which we are all subjected to. Our Human Area Networking technology conforms to the Radio Frequency-Exposure Protection Standard (RCR STD-38) issued by the Association of Radio Industries and Businesses (ARIB). The levels produced by the transceivers are well below the safety limit specified by this standard.

It is used for the elimination of human errors, as our device 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.
In touch advertising and receiving information as when a consumer stands in front of an advertising panel, advertising and information matching his or her attributes is automatically displayed.
By shaking hands, personal profile data can be exchanged between mobile terminals on the users. Communication can be kept private using authentication and encryption technologies.
Various conductors and dielectrics can be used as communication media, and this has the potential to create new behavior patterns. An electrically conductive sheet is embedded in the table. A network connection is initiated simply by placing a laptop on the table. A conductive metal sheet is placed on top of a table, and simply placing devices on it creates a conferencing system.
The Transceiver can carry music or video between headsets, mobile devices, mobile phones, etc. Users can listen to music from a player simply by putting on a headset or holding a viewer. In this case, the person is listening to music from a portable audio device through earphones.
Automatic user authentication and log-in with just a touch. ID and privileges are recorded in a mobile transceiver device. Corresponding receivers are installed at security checkpoints. The system can provide authentication and record who touched the device, and when. The PC is configured to the user's specifications simply by touching the mouse.
The most significant of all the applications is communication in new domains that is potential for use as communication method in outer space and under water. Moreover potential for use as communication method with devices inside the human body itself is remarkable.
A pacemaker inside the body if acquired takes a special radio frequency connector to interface to it. As more and more implants go into bodies, the need for a good Internet Protocol connection increases our human area network takes care of this interfacing. The most important application for body-based networking may well be for communications within, rather than on the surface of, or outside, the body.
An obvious question is why anyone would bother networking through their body, when proven radio-based personal area networking technologies, such as Bluetooth, already exist
¢ The body-based networking is more secure than broadcast systems. With Bluetooth, it is difficult to rein in the signal and restrict it to the device you are trying to connect to.
¢ We usually want to communicate with one particular thing. But in a busy area, there could be hundreds of Bluetooth devices within range. As human beings are ineffective aerials, it is very hard to pick up stray electronic signals radiating from the body. This 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.
¢ Unlike infrared or Bluetooth phones and PDAs, which enable people to "beam" electronic business cards across a room without even formally meeting, body-based networking allows for more natural interchanges of information between humans.
¢ The transceivers can be treated as standard network devices, so software running over Ethernet or other TCP/IP protocol-based networks will run unmodified.
¢ A transmission path is formed and initiated automatically by body contact A device can be started, information can be obtained, or a wide range of natural human actions can trigger various services.
¢ The communication is interactive and broadband. Unlike RFID, HAN technology supports two-way exchange of large amounts of data between portable electronic devices.
¢ There is an independent transmission path for each individual person even in congested places. so it provides a duplex, interactive, very secure, fast communication without any interference at a maximum speed of 10Mbps.As transmission speed does not deteriorate in congested areas where many people are communicating at the same time.
¢ Almost anything that acts as a conductor and dielectrics can be used as transmission media. Conductors could be a human or animal body, water, metal, etc.”can serve as a transmission path. This means that there is no need for a dedicated cable or antenna.
The Human Area Networking technology has subsequently been evaluated and reported by several research groups around the world. However, all those reported technologies had two limitations.
¢ The operating range through the body was limited to a few tens of centimeters.
¢ The top communication speed was only 40kbit/s.
These limitations arise from the use of an electrical sensor for the receiver. An electrical sensor requires two lines (a signal line and a ground line), whereas in intrabody communication there is essentially only one signal line, i.e., the body itself, which leads to an unbalanced transmission line, so the signal is not transmitted correctly.
By making Human Area Networks feasible, we can enable ubiquitous services based on human-centered interactions and therefore more intimate and easier for people to use. Human Area Networking has been used by technologies like RedTacton. As this technology is developing, we could all become individual networks that will exist individually but will interact on a daily basis with multiple other individual networks and larger networks. Our body and personal network will contain all the necessary hardware and software to connect to the greater network (whatever form our futuristic wi-fi clouds will take). In the near future, the most important application for body-based networking may well be for communications within, rather than on the surface of, or outside, the body. Of course this is dependent on this technology being adopted by the masses. An intriguing possibility is that the technology will be used as a sort of secondary nervous system to link large number of tiny implanted components placed beneath the skin to create powerful onboard -- or in-body “ computers.
Post: #2
read and for more about Data transfer through skin by human area networking or redtacon
Post: #3
kindly send me the report for human area network
Post: #4
Thank you very much.
Post: #5
hai..i need the abstract,report,ppt of data transfer through skin in simple form as soon as possible u can send to mail id:sumishere[at]

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