RFID technology is used in products chain management systems
Generally speaking, software communication protocols comprise two categories: application layer protocol and transport layer protocol. RFID (Radio Frequency Identification) transmission protocols belong to the latter. An RFID system includes smart cards, readers and antennas and these components function together via an integrated supply chain model. RFID was developed to improve data quality and correctness in an organization and enhance the traceability and authenticity of the products.
Transmission Protocols Specified in ISO 14443-4
Transmission Protocol defined in ISO 14443-4 delivers the transmission of data between the reader and tags. ISO 14443 is an international standard depicting the parameters for an identification card and its use. The transmitted data is composed of data such as command and response. The structure of this protocol is on the basis of the contact smart cards protocol so that this protocol is in compliance with existing smart card systems. When the smart card (also known as a tag) is activated, it responds to the first command from the reader. The card and reader always follow the following process: the reader sends commands to the card, which performs the command and sends a response back to the reader.
RFID-M1 - Communication Protocol
RFID-M1 is a generic protocol for products sending data to each other. This generic protocol supports communication between a Host and one or multiple terminal devices. This protocol need not to be linked to any electrical interface feature. The data format that the protocol supports is software configurable and can be customized to match the specific requirements of data transmission between two communication devices. The protocol is packet-oriented, which means the data transferred between two communication devices is in packet format. There are two types of data packets: command message which is the packet transmitted from the Host to the reader, and the reply message which is transferred from the reader to the Host.
Anti-collision Protocol for RFID Tags
With RFID becoming a standard for numerous product chain management systems, it is widely used in various applications to identify products. This technology uses radio waves as a mechanism for communication; therefore the RFID faces problems where multiple tags are present concurrently in the interrogation area of a reader. Tags will collide with each other when they mitigate each other's signal. An anti-collision protocol has been developed to address this issue based on an anti-collision algorithm for the RFID system. The problem can be eliminated by using three main techniques including domain method, frequency domain method and time domain method.
Tags: domain method, each other, between communication, between communication devices, chain management, chain management systems
