Radio Frequency Identification (RFID) is a wireless technology that has replaced
barcodes. This technology is used in today’s world to track assets and people. An RFID system
consists of three components: the tag, the reader, and the middleware. The RFID tag stores data,
the reader is used to identify the data stored in the tag or write data to the tag, and the RFID
middleware is the application that connects the data that the reader obtains from the tag with the
company inventory or database.
Unlike barcode readers, an RFID reader is capable of reading multiple tags located in its
range. When this occurs, the probability of tag collision at the reader’s end is high. To avoid tag
collision, anti-collision protocols are used. Slotted Aloha is one of the main anti-collision
protocols used with RFID.
This thesis proposed a mathematical model and a simulator to analyze the performance of
the Slotted Aloha protocol without interference. Tag detection is directly related to tag signal
strength detected by the reader. Radio Frequency signals behave differently when different
objects are present in the environment. For example water absorbs radio signals. When water is
present in the environment, tag detection will not be successful, since radio signals will be
absorbed by the water. Therefore, water is considered an interference factor in tag detection. This
thesis also proposed a mathematical model and a simulator to analyze the performance of the
Slotted Aloha protocol with interference. A comparison of both sets of results shows that the
proposed mathematical model and the simulator are accurate. Results of the analysis show that
the time required to identify tags with interference is longer than the time required to identify
tags without interference. / Thesis (M.S.)--Wichita State University, College of Engineering, Dept. of Electrical Engineering and Computer Science.
| Identifer | oai:union.ndltd.org:WICHITA/oai:soar.wichita.edu:10057/3476 |
| Date | 08 1900 |
| Creators | Deegala, Kavindya |
| Contributors | Namboodiri, Vinod |
| Publisher | Wichita State University |
| Source Sets | Wichita State University |
| Language | en_US |
| Detected Language | English |
| Type | Thesis |
| Format | x, 64 p. |
| Rights | Copyright Kavindya Sacheendri Deegala, 2010. All rights reserved |
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