Active RFID System with Embedded Wireless Sensor Network for Reliable Data Communication

Abstract

Reducing power consumption and per-hop latency are major challenges in Wireless Sensor Networks (WSNs), when network nodes or “tags” must be battery-powered. On the other hand, reducing transition overhead in RFID technology is crucial for efficient data collection and quick recognition of multiple tags. This chapter presents the method of analysis performed and explains the calculations used to evaluate the various performance behaviors based on the following mechanisms: (1) a duty cycle complying with the IEEE802.15.4 standard when assuming a fixed set of tags and free operating conditions. The system can be regarded as Reader Talk First (RTF), which is implemented during a tag collection process executed at the beginning of the system activation. (2) Wake-Up Mechanism, the tag transmits an identification packet to the reader and then waits for an Acknowledgment signal from the reader.