De?¬?ning an open
architecture and implementing readers compatible with this architecture further enhances
interoperability. It can be integrated with a large array of available sensors. In the next
section we will discuss the SDLR in more detail.
5.2 SDLR Architecture
RFID systems are demanding more data, faster logging, and higher interrogation rates, so
they require a powerful system that can manage information from a variety of sources,
store the data, and transmit it reliably and continuously for long periods of time to other
readers or a host PC. In addition, data logging is an extremely important part of RFID
because it is the best method for determining what happens during the tag interrogation
and to test software strategies and protocol ef?¬?ciencies.
5.2.1 Introduction
Today??™s continuously changing technology in RFID brings the need to build futureproof
RFID readers. If the functions that were formerly carried out by hardware can be performed
by software, new functionality can be deployed easily by updating the software.
With the existing stringent requirements of RFID spectrum, increasing traf?¬?c rates, and the
need to adhere with the regulations on spectrum usage, this requires even more sophisticated
signal-processing algorithms that can only be implemented on a software-based
RFID reader system.
The software-based RFID reader systemwill also allow the addition of new functionalities
with a short time-to-market.
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