An information system for logistics application is always expected to answer four questions: Who, What, When and Where (4Ws). Wireless Sensor Networks (WSN) aim to provide remote monitoring, which is regarded as When and What; Radio Frequency Identification (RFID) focuses on retrieving object identity, which is the answer of Who. As an extended concept of RFID, the Real-Time Localization Systems (RTLS) are required in certain applications in order to constantly update the answer of Where. As each of those technologies answers different but complementary parts of the 4Ws, hybrid systems that...
An information system for logistics application is always expected to answer four questions: Who, What, When and Where (4Ws). Wireless Sensor Networks...
