Intel develops Wi-Fi technology far away ... 100km

A San Francisco-based computer can connect to Wi-Fi wireless networks in San Jose, California while the distance between two places is approximately hundreds of kilometers? What seems to be very difficult to do now has become a reality with the new Wi-Fi networking technology of the world's leading chip maker Intel.

Impossible variables are possible

With current Wi-Fi networks, the signal coverage area is usually only about 100 meters. But now, according to Eric Brewer, director of the Intel Research Berkeley lab, academics and scientists at Intel's lab have successfully established Wi-Fi systems capable of transmitting signals to the way they are. more than 100km (more than 60 miles).

Intel's long-range Wi-Fi antenna system.Source CNET .

Mr. Eric said: ' This system includes hardware devices like other Wi-Fi networks but has software modifications '.

To demonstrate the system's performance, Intel has established a connection between its laboratory in the Bay Area inner city area and the University of California's space science laboratory, which is a reservation room. at 1,200 feet (365.76m) and 1.5 miles away at Grizzly Peak Avenue. The signal receiving device in this room consists of a directional antenna, connected to a WiFi Access Point transmitting device (like any normal wireless Access Point but has been edited).

It must be said immediately that this is not the system used to serve Europe and America. This initiative is part of efforts to bring computer technology to people in third world countries. Because in most of these countries, the communication infrastructure is still quite weak, almost all of the best is concentrated in the city, while the village is the place where the population is born. The most crowded means of communication with the outside world is nothing more than cars, buses and . trails.

The wire behind the antenna drives the Wi-Fi signal. Source CNET . According to Mr. Brewer, these new Wi-Fi antennas will act as an important link in the signaling chain through many Access Points. People can use this antenna right in their village area, because they will transmit signals through some other broadcast towers, until the last 'dock' is a fiber optic cable to be able to connect. Internet to the village.

What is Intel's long-range Wi-Fi different from WiMax?

In fact, these long-range Wi-Fi antennas function as WiMax wide-area wireless coverage technology, a type of technology currently being developed by many companies, including Intel. An initial difference is that while WiMax broadcast towers are quite expensive (from $ 15,000 to $ 20,000), the price of Wi-Fi transmission towers ranges from $ 700 to $ 800.

Another point, Brewer said, is that long-range Wi-Fi networks will transmit signals faster. In addition, the radio that WiMax uses is coordinated by telecom operators, the construction of signal transceiver towers as well as WiMax service providers needs approval from the local authorities.

While Wi-Fi networks operate without permission, people can access the network at any time. By the end of this year, Intel will build testing of long-range Wi-Fi technology or some components of the technology in Uganda.

Method of antenna operation

One of the biggest differences between conventional Wi-Fi networks and Intel's wide-area Wi-Fi network is that long-range transmission signals are oriented: They will be tuned to be transferred directly from the antenna to the antenna. other than being "out of the way" out. Meanwhile, a normal Wi-Fi antenna will transmit signals to all directions in a circle of 3600.

Alan Mainwaring, a scientist at Intel Research Berkeley, describes how signaling antennas work.Source CNET .

Setting the signal with such orientation is not easy. To do that, the antennas need to be installed to 'connect correctly' with each other. Any object that interleaves may interfere with the signal transmission process.

' It is difficult to connect them. The first thing that happens most is that kids can play on signal towers, 'admitted Alan Mainwaring, a scientist at Intel Research Berkeley.

To overcome this, Intel has come up with a type of antenna that can 'tune' in the direction of signal transceiver. Of course, at the antenna, it is impossible to drive the signal, but when the signal travels between two transmission towers, it can be adjusted by an electrical signal. Thanks to the electrical signal, the antennas do not have to be aligned with each other, even when a little skewed, the integrity of the signal is still guaranteed.

Compared to the standard Wi-Fi communication process, Intel's long-range Wi-Fi network has omitted many protocols and connection procedures. Specifically, the process of "handshaking" - the process of letting the computer and the wireless router establish a connection in a regular Wi-Fi network - and the detection of the detector is also removed.

Do Duong