with a technique called Passive Wi-Fi to the sugar shaker and the paper towel placed on the Internet.
WLAN connections need compared to Bluetooth is currently significantly more energy. This can be especially in mobile devices cause problems. Scientists at the University of Washington have developed a new method called “Passive Wi-Fi” developed which significantly decreases the power consumption in wireless transmissions.
In comparison to established alternatives such as Bluetooth Low Energy or Zigbee, the new technology for exchanging data 1000 times less energy compared with current wireless devices required can be even save 10,000 times as much electricity. Given Passive Wi-Fi is a separation of analog and digital signal transmission. The charge of the digital data exchange components require only a fraction of the energy of their analog counterparts, who are responsible for sending the data via antenna.
Researchers have therefore outsourced the transmitting unit. It draws its power from a wall outlet. however, the mobile device has only passive wireless sensors that do not require much power. Nevertheless, they can receive waves and reflect specifically. This results in WLAN packets, which can be up to 11 megabits transmitted per second.
within the university campus, the technology could be successfully tested. Passive WLAN is particularly suitable for the networked home. By power-saving components even the sugar shaker or the role of household towels could communicate with other devices. The low power consumption of 15-60 microwatts would allow the use in articles of clothing or other gadgets.
Complete the projects financed by the National Science Foundation and Qualcomm study results will be presented next month at the USENIX Symposium on Networked Systems Design and Implementation.