RFID Solution

RFID Tag air interface



Air interface communication protocol specification between readers and electronic tags for information exchange, the purpose is for different manufacturers to produce interoperability between devices. Air interface protocol ISO/IEC to develop five kinds of bands, this idea fully reflects the relative standard, a standard is a common demand for a wide range of applications, but not all application requirements, a set of standard can meet the demand of larger.

ISO/IEC 18000-1, information technology -- radio frequency identification based on single product management -- reference structures and standardized parameter definitions. It regulates the communication parameters list of readers and tags, the basic rules of intellectual property rights and so on, which are abided by in the air interface communication protocol. In this way, each band corresponding to the standard does not need to repeat the same content.

ISO/IEC 18000-2 information technology based on RFID - single product management suitable for intermediate frequency 125 ~ 134KHz, specified in the tag and read-write physical interface communication between the reader and should have Type A (FDX) and Type B (HDX) the ability to tag communication; provisions of anti collision protocol and command and method multi label communication.

ISO/IEC 18000-3, information technology - RFID based on single product management - for high frequency 13.56MHz, specifies physical interfaces, protocols, and commands between readers and tags, plus anti-collision methods. The anti-collision protocol can be divided into two modes, and mode 1 is divided into the basic type and the two extended protocols (time slot free terminated multi responder protocol and slot terminated adaptive polling, multiple transponder read protocol). Mode 2 adopts the time frequency multiplexing FTDMA protocol, which has 8 channels, and is suitable for a large number of tags.

ISO/IEC 18000-4, information technology - RFID based on single product management - applicable to microwave section 2.45GHz, specifies physical interfaces, protocols and commands between readers and tags, plus anti-collision methods. The standard includes two modes, mode 1 is passive tag, work mode is read and write device first; mode 2 is active label, work mode is label first.