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Title: Contributions to the development of active RFID systems at the 433 MHz band
Author: Tuset Peiró, Pere
Director: Vilajosana i Guillén, Xavier
Others: Universitat Oberta de Catalunya. Escola de Doctorat
Keywords: radio frequency identification
medium access control protocols
wireless communications
electronic technology
telecommunications technology
Issue Date: 13-Mar-2015
Publisher: Universitat Oberta de Catalunya. Escola de Doctorat
Abstract: Given the potential of active RFID technology, this thesis contributes to its development by focusing on the lowest layers of the stack, that is, the physical and data-link layers. These layers determine the tag communication range, packet throughput and energy consumption, which are key performance parameters. At the physical layer, the thesis studies propagation aspects of the 433 MHz band in different environments and compares it to the 2.4 GHz band, which is also used in active RFID systems. The results demonstrate that active RFID systems operating at the 433 MHz band can achieve a better communication range at the same transmit power due to better propagation characteristics. At the data-link layer, the thesis proposes LPDQ (Low-Power Distributed Queuing), a new MAC (media access control) protocol, and compares it to FSA (Frame Slotted ALOHA). LPDQ combines LPL (Low-Power Listening) for network synchronization and DQ (Distributed Queuing) for data transmission. Compared to the optimal FSA case, LPDQ can achieve a performance close to the theoretical maximum (99.5%), regardless of the number of tags, and reduces tag energy consumption by more than 10%.
Language: English
Appears in Collections:Tesis doctorals

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