
CSL CS101-2 EPC CLASS 1 GEN 2 RFID HANDHELD READER
USER'S MANUAL, VERSION 1.0
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Appendix B. Glossary
Air interface
The complete communication link between an Interrogator and a Tag including the physical
layer, collision arbitration algorithm, command and response structure, and data-coding
methodology.
Autonomous time trigger
Each tag will only be reported once within a duplicate elimination time. See also duplicate
elimination time.
Batch alert to server
Collected tag information are sent to server at the end of each duplicate elimination cycle
(Time Window)
Capture point
Unique name corresponding to each of the four antennas
Command set
The set of commands used to explore and modify a Tag population.
Continuous wave
Typically a sinusoid at a given frequency, but more generally any Interrogator waveform
suitable for powering a passive Tag without amplitude and/or phase modulation of sufficient
magnitude to be interpreted by a Tag as transmitted data.
Cover-coding
A method by which an Interrogator obscures information that it is transmitting to a Tag. To
cover-code data or a password, an Interrogator first requests a random number from the Tag.
The Interrogator then performs a bit-wise EXOR of the data or password with this random
number, and transmits the cover-coded (also called
ciphertext) string to the Tag. The Tag uncovers the data or password by performing a bit-wise
EXOR of the received cover-coded string with the original random number.
Dense-Interrogator environment
An operating environment (defined below) within which the number of simultaneously active