Low Level Reader Protocol

The Low Level Reader Protocol ( LLRP ) is a protocol for communication with RFID readers via TCP. The LLRP was ratified by EPCglobal in order to standardize the interface between RFID applications and RFID readers, it moves so that in the application layer of the OSI model. The current version is LLRP standard v. 1.0.1.

The aim of the LLRP is to make all the standard features of the communication between an RFID reader and an RFID tag according to EPCglobal - Tagprotokoll EPC Class 1 Gen 2 can also be used in the communication between RFID readers and RFID applications. In addition to controlled through this protocol (for example, enabled and disabled) and configured (for example, change the number and the emitted power of the connected antennas) can be RFID reader. The LLRP is independent of the respectively applicable regulations (eg power which may be in which frequency ranges emitted ) can be used.

The protocol is modular, flexible and expandable - on the one hand, in order to incorporate future developments with little effort in the protocol can, on the other hand, to manufacturers of RFID readers to enable the extension of the protocol to include vendor-specific commands.

Operation

The communication units between client and RFID reader ( the LLRP in the server's role is ) hot news. Messages can be sent to the client, both from the client to the reader as well as by the reader. The communication goes through after the connection the following phases:

The first three steps are not absolutely necessary for further operations, as, for example, the client leave the reader to perform multiple write operations one after the other, phases 1 and 2 need only be done once though.