Estimación de marcas en redes RFID - Posgrado en Ciencias y ...

ABSTRACT
Nowadays, RFID is a technology widely used in several areas. The attractiveness of RFID
is the ability to identify objects without contact or a direct sight line between the devices
involved. Due to its large impact, it is necessary that the RFID technology accounts with
mechanisms that improve its functionality while at the same time, optimizing its performance.
The RFID technology has great challenges, such as collision resolution, energy saving,
security, etc. An improvement in any of these fields invariably involves an improvement in
performance and operation of this technology, which in turn can translate into the opening
of new applications using technology RFID.
In this master’s thesis we focus on solving one of the main problems concerning RFID
networks: tags collisions. This problem is one of the most important in RFID networks,
since besides the loss of information sent by the tags, there is also a waste of bandwidth
and energy, which causes an increase of identification delay, being the latter one of the most
important performance metrics in such networks.
Throughout this master’s thesis, we present an overview of the fundamentals of RFID
networks, their principal components, a description of the participating devices, etc. We then
detail the problem of tag collisions and the context in which they occur. Similarly, we present
a review of several anticollision protocols that have been proposed so far in the literature for
RFID networks, and finally we discuss the advantages and disadvantages they offer.
Based on our study, we propose an anticollision protocol based on p-persistent CSMA,
which overperforms the existing standards for RFID used and a couple of recent proposals in
the literature. We evaluate our proposal based on identification delay obtaining reliable and
valid results.
We conclude our work by discussing the results, and describing our future work on RFID
systems.
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