An RFID Based Smartphone Proximity Absence Alert System
We argue that augmenting a mobile phone with an UHF RFID reader has the potential to expand the scope of mobile phone sensing applications. We investigate an important issue that arises when contemplating such integration --- the energy consumption characteristics of state of the art compact UHF RFID readers collecting data from nearby sensor tags. Our experimental study shows that a typical operation using a compact UHF RFID reader consumes much less energy compared to sensors commonly present in mobile phones such as GPS, thereby supporting the case for UHF RFID reader integration with mobile phones.
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