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. 2018 Jun 11;18(6):1904.
doi: 10.3390/s18061904.

Energy-Aware RFID Anti-Collision Protocol

Laura Arjona  1 , Hugo Landaluce Simon  2 , Asier Perallos Ruiz  3
Affiliations

Energy-Aware RFID Anti-Collision Protocol

Laura Arjona et al. Sensors (Basel). .

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.

Keywords: EPC-global standard; anti-collision; energy-aware; radio frequency identification; tag estimation.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Link timing of EPC C1G2.
Figure 2
Figure 2
Evaluation of the energy consumption per tag in one inventory round, varying n from 16–2048, with Ptx = 825 mW and Prx = 125 mW. EASA, Energy-Aware Slotted Aloha; ILCM-SbS, Improved Linearized Combinational Model with Slot by Slot; FbF, Frame by Frame; DSSA, Dynamic Segment-by-Segment Aloha.
Figure 3
Figure 3
(a) Total number of idle slots per tag ci/n and (b) total number of collision slots per tag ck/n, varying n from 16–2048.
Figure 4
Figure 4
(a) Reader bits per tag and (b) bits per tag to identify n tags, varying n from 16–2048.
See this image and copyright information in PMC

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