Ericsson Human Network transmission test Site

Figure 1, 2: Ericsson Human Network transmission test Site

Newspaper reporter Wu Xiaoli

Touch the door handle, you can open the door lock; When two of people pass by, they can exchange their business cards with one hand, touch the cashier, you can pay, touch the computer screen, you can download pictures and video, touch the terminal device by hand, you can get links, file information ... These High-tech technologies, which are often seen in movies, are now being realized in reality. The reporter learned that Ericsson has recently successfully conducted a series of conceptual demonstrations and technical demonstrations to prove that the human body can indeed be used as a network to complete a variety of data exchange.

The transmission of human body network becomes a reality when a person is holding a mobile phone in one hand and the other hand is placed on a digital terminal, there is no connection line to achieve instant and high-speed information. At this point, the human body is the network.

A recent test by Ericsson has shown that when the human body is used as a communication line, there is a faint and secure signal passing through the body and the rate of 6MB-10MB per second is achieved. According to the reporter understands, in Ericsson's this experiment, the human body network transmission highest rate can reach 10mb/second, this rate can transmit almost any information content.

The test of the employing body as a communication conductor was named "Connectedme", the human body as a network, examples of cases that have been successfully used for presentations include streaming music transmissions from smartphones, photo transmissions taken by mobile phones, getting web links from devices, and sending password messages to door handles to unlock access. So far, human touch behavior has become an intelligent way to interact and connect with the Internet and other digital devices.

It is understood that as early as 1995, MIT demonstrated the human Body network transmission technology, at that time the transmission rate of 2.4kb/seconds. Subsequently, South Korea's KAIST University and Japan telecom operators DoCoMo, has also been the development of human communication technology.

The working principle of human network transmission "there is a network in you and me, and it passes through our bodies with very faint signals." "said one expert.

The reporter learned that in Ericsson for this demo smartphone, equipped with a special digital circuit, can carry out capacitive data transmission. The circuit is connected to a metal plate, which functions to send the signal to the human body. In addition, similar loops and metal plates are also installed at the receiving end to detect faint signals flowing through the human body. The test allows the signal to be transmitted by adjusting the voltage of the transmitter electrode and monitoring the potential difference on the receiver's electrode. At this time, in addition to the existence of potential difference in the human body, it will flow through a small current. The physical phenomena used in experiments are often referred to as capacitive coupling (ca-pacitivecoupling). The capacitive coupling technology utilizes the naturally generated signals of the human body to transmit information between the human body and the device.

People can use the capacitance coupling technology to transmit information through organism such as human body, if this method is combined with the conventional communication mode in current digital communications, a kind of super combination can be obtained, which not only is advantageous to the innovation, but also can realize the current technology difficult or cannot realize the interaction.

In addition, the benefits of this technology include helping to develop Easy-to-use solutions. For example, the development of wearing headphones can be connected to the HBC remote control functions of smartphones, put on headphones can play music or hands-free phone calls. Other advantages include: 1. Safeguarding the personal area of communication human network can make people themselves is a personal area network (PAN), so that the signal can not touch the human body and escape; 2. You can use a device such as a printer without a cable/connector 3. Energy efficiency can achieve low power consumption, the human body does not need additional power supply.

The transmission process is not dangerous for the human body to connect the body directly to the electronic device, no matter who will feel insecure. But don't worry, experts say, this is not dangerous, because the test using the power level of the human body is very low, so it will not cause any harm to the human body. In other words, the realization of human network transmission is neither the risk of breakdown by the current, nor the risk of ionizing radiation.

Although the "Human Network" is a new technology developed by Ericsson Labs, a series of tests show that the equipment used in the laboratory meets the requirements of commercial equipment such as smartphones, and that there is plenty of room for them. The standards followed in the test were established by the International Non-ionic Radiation Protection Commission (ICNIRP) and recognized by the World Health Organization (WHO).

Wide range of applications using capacitive coupling technology, human life will become very convenient, this than the use of Bluetooth devices such as the need for less energy. Capacitance coupling technology in the future may have a large market development space. According to the data transmission rate of Ericsson test, the future application of human network transmission can be classified into the following three categories:

First, low-speed cases: for example, through people's wear, to achieve the bill, and terminal equipment to send and receive information, open/Send Web links and other applications;

Second, the medium-speed case: You can browse mobile phone files, print or store files, exchange business cards and playlists between people, through wearing or internal signals for health care;

Third, high-speed cases: including the transmission of music to headphones, video transmission, the use of multimedia to enhance the effect.

According to the experts, the capacitive coupling technology can also be fundamental to mobile devices, such as smartphones, so that these devices on the speakers, cameras and other components can be connected to the human channel on the "Personal access point." In addition, the future may also be achieved in the human body implanted medical tools.

The network world, is the individual, the enterprise and the society can obtain the beneficial society from the interconnection equipment. It is expected that by 2017, mobile phone users around the world will reach 9 billion, of which smartphone users are 3 billion. Mobile data traffic will be 15 times times higher than in 2010. By then, Mobile broadband will cover 85% of the world's population, the future development of human network technology will depend on everyone, at the same time, this will touch the natural behavior of objects and communication of creative thinking, will give people's lives endless possibilities.