A Novel Cross Layer Anti-Collision Algorithm for Slotted ALOHA-Based UHF RFID Systems

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A Novel Cross Layer Anti-Collision Algorithm for Slotted ALOHA-Based UHF RFID Systems
Title:
A Novel Cross Layer Anti-Collision Algorithm for Slotted ALOHA-Based UHF RFID Systems
Journal Title:
IEEE Access
Publication Date:
21 February 2019
Citation:
Z. Huang et al., "A Novel Cross Layer Anti-Collision Algorithm for Slotted ALOHA-Based UHF RFID Systems," in IEEE Access, vol. 7, pp. 36207-36217, 2019. doi: 10.1109/ACCESS.2019.2900739
Abstract:
Reducing collisions in UHF RFID systems is a crucial problem. In most anti-collision designs, the reader has to estimate the number of tags within its reading range during the interrogation process. Most of the approaches estimate the number of tags with observations in multiple time slots. Since estimation error varies along with the initial frame length and the number of tags, system ef ciency is affected by both of them. To reduce the sensitiveness to them and improve system ef ciency, we propose a novel MAC-PHY crosslayer anti-collision algorithm based on Bayesian inference. Speci cally, each frame is allowed to end at an early stage and a slot-by-slot estimator is proposed. Bene t from its slot-by-slot nature, system ef ciency is more stable and independent on the initial frame length and very close to the upper bound of dynamic framed slotted ALOHA (DFSA) algorithm. The performance of the proposed method is compared with the stateof- the-art algorithms through numeric simulations. The results show that the proposed solution signi cantly outperforms the compared ones.
License type:
PublisherCopyrights
Funding Info:
Description:
(c) 2019 IEEE.
ISSN:
2169-3536
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