The LLRP
features provide the following:
. A means to command an RFID reader to inventory tags, read tags, write to tags,
and execute other protocol-dependent access commands (such as ??????kill??™??™ and
??????lock??™??™ in C1G2)
. A means for robust status reporting and error handling during tag access operations
. A means for conveying tag passwords necessary to effect commands that may
require them, such as the ??????kill??™??™ command in C1G2
. A means to control the forward and reverse RF link operation to manage RF power
levels and spectrum utilization, and assess RF interference, among RFID readers in
a system
. A means to control aspects of Tag Protocol operation, including protocol parameters
and singulation parameters
. A means to facilitate the addition of support for new air protocols
. A means for the retrieval of reader device capabilities
. A means for vendors of reader devices to de?¬?ne vendor-speci?¬?c extensions to the
protocol in a manner that is noninterfering among vendors, and which, to the
extent possible, is vendor-administered
While LLRP is component of the second-generation Reader Protocol, the other component
will be the High-Level Reader Protocol (HLRP). Reader devices may implement HLRP,
LLRP, or both. LLRP is air-protocol-aware (V1.0 is C1G2 protocol aware), whereas HLRP
will be air-protocol-unaware, and will incorporate only those commands and facilities that
are generic across air protocols.
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