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Functionality of Tag:
Active and passive tags talk to reader using different air-interface protocols. Hence, reader
should support the functionality of tag. A multi-protocol reader which supports different
protocols is seen as the best solution and is quiet popular in today’s market.
Air Interface Protocol:
Reader should support the air-interface specifications provided by either EPC or ISO standards.
The reader and tag should comply with these standards. Some readers can support EPC as well
as ISO standard protocols and these are the most popular ones in the market.
Other Factors
Other factors like the number of tags read per second, interface to the host and anti-collision
(Tag collision and Reader collision) are also important. Based on need of application, suitable
parameters can be chosen for the selection of the reader. Anti-collision requirement can be the
most demanding feature. Reader should recognize uniquely the identity of tags lying in the range
of the reader. ISO and EPC protocols define anti-collision implementations.
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