“…To overcome these difficulties, various wireless technologies have been experimented with including infrared, bluetooth, IEEE 802.11 wireless LAN, ultrasonic, video camera, and Radio Frequency IDentification (RFID) [1], [4], [5]. RFID seems to be the most suitable candidate for tracking and localization in SH systems because of its robustness, low price, and flexibility [5]. In addition, RFID can uniquely identify physical artifacts and can be used as a universal entry point to integrate them into the Internet of Things (IOTs) [6], and thus, RFID presents a viable solution in building SH systems.…”