Abstract
The growing interest in mobile devices is transforming wireless identification technologies. Mobile and battery-powered Radio Frequency Identification (RFID) readers, such as hand readers and smart phones, are are becoming increasingly attractive. These RFID readers require energy-efficient anti-collision protocols to minimize the tag collisions and to expand the reader’s battery life. Furthermore, there is an increasing interest in RFID sensor networks with a growing number of RFID sensor tags. Thus, RFID application developers must be mindful of tag anti-collision protocols. Energy-efficient protocols involve a low reader energy consumption per tag. This work presents a thorough study of the reader energy consumption per tag and analyzes the main factor that affects this metric: the frame size update strategy. Using the conclusion of this analysis, the anti-collision protocol Energy-Aware Slotted Aloha (EASA) is presented to decrease the energy consumption per tag. The frame size update strategy of EASA is configured to minimize the energy consumption per tag. As a result, EASA presents an energy-aware frame. The performance of the proposed protocol is evaluated and compared with several state of the art Aloha-based anti-collision protocols based on the current RFID standard. Simulation results show that EASA, with an average of 15 mJ consumed per tag identified, achieves a 6% average improvement in the energy consumption per tag in relation to the strategies of the comparison.
Highlights
Radio Frequency Identification (RFID) technology is becoming increasingly popular to the point where almost anything can be tagged
Presentation of a novel anti-collision protocol: Energy-Aware Slotted Aloha (EASA); the proposed protocol applies the results obtained in the previous contribution to decrease E/n in an RFID system based on EPC C1G2
A novel RFID anti-collision protocol based on the current standard EPC-global Class-1
Summary
Radio Frequency Identification (RFID) technology is becoming increasingly popular to the point where almost anything can be tagged. Anti-collision protocols are proposed to arbitrate tags’ responses and to increase the number of tags identified by a time unit. Most energy saving protocols aim to reduce the energy cost of the reader and tags separately for active RFID systems [16,17,18,19]. Other recent works focus on passive RFID systems, but they use tree-based anti-collision protocols [4,11,20]. Presentation of a novel anti-collision protocol: EASA; the proposed protocol applies the results obtained in the previous contribution to decrease E/n in an RFID system based on EPC C1G2.
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