RFID Standard Architecture
The RFID standard system mainly includes RFID technical standards, RFID application standards, RFID data content standards and RFID performance standards. Among them, the coding standard and the communication protocol (communication interface) are the more fiercely contested parts, and the two also constitute the core of the RFID standard.1. RFID technical standards
RFID technical standards mainly define the air interface and related parameters of different frequency bands, including basic terms, physical parameters, communication protocols and related equipment.
2. RFID application standards
RFID application standards mainly involve the construction rules of RFID in specific application fields or environments, including application standards and specifications of RFID in the fields of logistics distribution, warehousing management, flexible transportation, information management, animal identification, mine safety, industrial manufacturing and leisure and entertainment.
3. RFID data content standard
RFID data content standard mainly involves data protocol, data coding rules and grammar, including coding format, grammar standard, data symbol, data object, data structure and data security. The RFID data content standard can support a variety of encoding formats, such as the encoding formats specified by EPCglobal and DOD, as well as the label data format standard specified by EPCglobal.
4. RFID Performance Criteria
RFID performance standards mainly involve equipment performance and conformance testing methods, especially data structure and data content (ie data encoding format and memory allocation), mainly including printing quality, design process, test specifications and test procedures.
EPCglobal standard system:
EPCglobal is a non-profit organization jointly initiated and established by UCC and EAN. EPC system is a system based on EAN/UCC coding. As a coded representation of product and service circulation process information, EAN/UCC coding has a complete set of globally unique identification codes covering various tangible or intangible products in the trade circulation process. Includes identification codes such as trade items, logistics units, service relationships, commodity locations, and related assets. The EAN/UCC identification code is established at the source of circulation with the production of the product or service, and accompanies the flow of the product or service throughout the entire process.
an open structure
, an independent platform, a high degree of interactivity, a
flexible and sustainable development system
All EPCglobal System Framework standards are shown in Table 7-1. These standards are closely related to EPC physical object exchange, EPC infrastructure and EPC data exchange activities. Table 7-1 is mainly for the specification of all components in the current EPCglobal system framework, rather than a roadmap for future work.
(2) 13.56MHz ISM band Class 1 radio frequency identification tag interface specification.
(3) 860 ~ 930MHz Class 1 radio frequency identification tag radio frequency and logic communication interface specification.
(4) Class 1 Gen2 UHF RFID conformance requirements specification
(5) EPCglobal system framework.
(6) EPC label data standard.
(7) Class1 Gen2 UHF air interface protocol standard
(8) Application level event specification.
(9) Object name resolution business specification.
EPC label classification
The only information stored in the EPC tag is the 96-bit or 64-bit product electronic code. To reduce cost, EPC tags are usually passive radio frequency tags.(1) Class 0 EPC label. Labels that meet the basic application functions of logistics and supply chain management (such as checkout payment in supermarkets, supermarket shelf scanning, container cargo identification, cargo transportation channels, and warehouse management, etc.). The main functions of Class 0 EPC tags include: must contain EPC code, 24-bit self-destruction code and CRC code; can be read by the reader; can be overlapped read; can be self-destructed; the memory cannot be written by the reader enter.
(2) Class 1 EPC label. Class1 EPC tags, also known as identity tags, are passive, backscattering tags. In addition to having all the characteristics of a Class 0 EPC label, it also has an electronic product code identifier and a label identifier. The Class1 EPC tag has a self-destruct function, which can make the tag permanently invalid. In addition, there are features such as optional password-protected access control and optional user memory.
(3) Class2 EPC label. Class2 EPC tags are also passive, backscattering tags. In addition to all the features of Class1 EPC tags, it also includes extended Tag Identifier (TID), extended user memory, and selective reading. Class 2 EPC tags add authentication mechanisms to access control and will define other additional functions.
(4) Class 3 EPC label. The Class3 EPC tag is a semi-active, backscattering tag. In addition to all the features of the Class 2 EPC label, it also has a complete power system and integrated sensing circuitry. Among them, the on-chip power supply is used to provide some logic functions for the tag chip.
(5) Class 4 EPC label. Class4 EPC tag is an active, active tag, in addition to having all the features of Class 3 EPC tag, it also has tag-to-tag communication function, active communication function and special networking function.
EPC Information Network System
The information network system consists of the local network and the global Internet, and is a functional module that realizes information management and information circulation. The information network system of the EPC system is based on the global Internet, through EPC middleware, object resolution service (ONS) and EPC information service (EPCIS) to achieve global "physical interconnection".(1) EPC middleware.
EPC middleware has a series of "program modules" or "services" with specific properties and is integrated by users to meet their specific needs, EPC middleware is called Savant. Savant is software that connects readers and applications, and is the core technology in the Internet of Things. It can be considered as the nervous system of the network, so it is called Savant. Its core function is to shield the heterogeneity between RFID readers and other hardware devices, application software systems and data transmission formats of different manufacturers, so as to realize seamless connection between different hardware (readers, etc.) and different application software systems Integrate with real-time dynamics.
Object name resolution service.
The object name resolution service is an automatic network service system, similar to the domain name resolution service, and ONS specifies the server for storing product-related information for the Savant system. ONS service is the network hub connecting Savant management software and EPC information service, and ONS design and architecture are based on Internet domain name resolution service
EPC Information Services.
EPC information service is implemented as a network database , EPC is used as the query pointer of the database, and EPCIS provides an interface for information query, which can be connected with existing databases, application programs and information systems . EPCIS has two data flow modes: one is that the reader sends raw data to EPCIS for storage ; the other is that the application sends a query to EPCIS to obtain information. EPCIS was also known as PML service, but now it is not necessary to use PML for storage and markup.
