Close X
Monday, November 11, 2024
ADVT 
Tech

US Engineers Achieve Passive Wi-Fi At 10,000 Times Less Power

Darpan News Desk IANS, 24 Feb, 2016 11:04 AM
    In an effort to curb battery drainage as you use Wi-Fi to play games or watch movies, a team of engineers including Indian-origin researchers has demonstrated that it is possible to generate Wi-Fi transmissions using 10,000 times less power than conventional methods.
     
    The new "Passive Wi-Fi" system also consumes 1,000 times less power than existing energy-efficient wireless communication platforms, such as Bluetooth Low Energy and Zigbee, said computer scientists and electrical engineers from University of Washington.
     
    "We wanted to see if we could achieve Wi-Fi transmissions using almost no power at all. That is basically what 'Passive Wi-Fi' delivers. We can get Wi-Fi for 10,000 times less power than the best thing that's out there,” said study co-author Shyam Gollakota, assistant professor of computer science and engineering.
     
    “Passive Wi-Fi” can for the first time transmit Wi-Fi signals at bit rates of up to 11 megabits per second that can be decoded on any of the billions of devices with Wi-Fi connectivity.
     
    These speeds are lower than the maximum Wi-Fi speeds but 11 times higher than Bluetooth.
     
    Apart from saving battery life, wireless communication that uses almost no power will help enable an “Internet of Things” reality where household devices and wearable sensors can communicate using Wi-Fi without worrying about power.
     
    “All the networking, heavy-lifting and power-consuming pieces are done by the one plugged-in device. The passive devices are only reflecting to generate the Wi-Fi packets, which is a really energy-efficient way to communicate,” explained co-author Vamsi Talla, electrical engineering doctoral student.
     
     
    To achieve such low-power Wi-Fi transmissions, the team essentially decoupled the digital and analog operations involved in radio transmissions.
     
    The Passive Wi-Fi architecture assigns the analog, power-intensive functions - like producing a signal at a specific frequency -- to a single device in the network that is plugged into the wall.
     
    An array of sensors produces Wi-Fi packets of information using very little power by simply reflecting and absorbing that signal using a digital switch.
     
    In real-world conditions on the university campus, the team found the passive Wi-Fi sensors and a smartphone can communicate even at distances of 100 feet between them.
     
    Because the sensors are creating actual Wi-Fi packets, they can communicate with any Wi-Fi enabled device right out of the box.
     
    “Our sensors can talk to any router, smartphone, tablet or other electronic device with a Wi-Fi chipset," noted electrical engineering doctoral student Bryce Kellogg.
     
    The technology can enable entirely new types of communication that haven't been possible because energy demands have outstripped available power supplies. It could also simplify our data-intensive worlds.
     
    “Now that we can achieve Wi-Fi for tens of microwatts of power and can do much better than both Bluetooth and ZigBee, you could now imagine using Wi-Fi for everything,” said Joshua Smith, associate professor of computer science and engineering.
     
    The technology has also been named one of the 10 breakthrough technologies of 2016 by the journal MIT Technology Review.
     
     
    A paper describing those results will be presented in March at the 13th USENIX Symposium on Networked Systems Design and Implementation in California.

    MORE Tech ARTICLES

    US woman sues Facebook over 'revenge porn' images

    US woman sues Facebook over 'revenge porn' images
    A woman in the US has filed a $123 million case against social networking site Facebook for not deleting "revenge porn" images uploaded by her old friend....

    US woman sues Facebook over 'revenge porn' images

    Getting chatty with meow chat

    Getting chatty with meow chat
    A new chat app is on the prowl, stalking users on social networks like a cat...

    Getting chatty with meow chat

    Instagram launches messaging app

    Instagram launches messaging app
    Social network Instagram has launched its messaging app called Bolt which makes sending visuals easy. The easy to use app allows you to tap once to...

    Instagram launches messaging app

    Our Milky Way much smaller than previously thought

    Our Milky Way much smaller than previously thought
    The Milky Way, the galaxy that contains our solar system, is way smaller than astronomers previously thought, says a study...

    Our Milky Way much smaller than previously thought

    New device allows blind to read graphs

    New device allows blind to read graphs
    In what could open up new career paths and educational opportunities for the visually impaired, researchers have developed a digital system that allows...

    New device allows blind to read graphs

    Carbon dioxide can be future fuel source

    Carbon dioxide can be future fuel source
    In a significant breakthrough, scientists have synthesised a catalyst that improves the system for converting waste carbon dioxide into syngas...

    Carbon dioxide can be future fuel source