CSL CS101-2 EPC CLASS 1 GEN 2 RFID HANDHELD READER
USER'S MANUAL, VERSION 1.0
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Collectively, the set of functions and commands used by an Interrogator to identify and modify
Tags. (Also known as the Tag-identification layer.)
Passive Tag (or passive Label)
A Tag (or Label) whose transceiver is powered by the RF field.
Permalock or Permalocked
A memory location whose lock status is unchangeable (i.e. the memory location is permanently
locked or permanently unlocked) is said to be permalocked.
Persistent memory or persistent flag
A memory or flag value whose state is maintained during a brief loss of Tag power.
Physical layer
The data coding and modulation waveforms used in Interrogator-to-Tag and
Tag-to-Interrogator signaling.
Polling Trigger by Client
Tags read are buffered in reader until client application polls the read result. A tag will only be
reported once in each polling trigger.
Protocol
Collectively, a physical layer and a Tag-identification layer specification.
Q
A parameter that an Interrogator uses to regulate the probability of Tag response. An
Interrogator commands Tags in an inventory round to load a Q-bit random (or pseudo-random)
number into their slot counter; the Interrogator may also command Tags to decrement their slot
counter. Tags reply when the value in their slot counter (i.e. their slot – see below) is zero. Q is
an integer in the range (0,15); the corresponding Tagresponse probabilities range from 20 = 1
to 2–15 = 0.000031.
Resultant Action
Resultant action that will be enforced when an event logic is established
Single Target Large Population Inventory
A mode for reading a large number of tags at a time accurately. When this mode is used, tags
that are read already will not respond to the reader for a short period of time. This can avoid the