RFID the tags and the readers. The key

 RFID Technology  Radio frequency identification (RFID) is a relatively new automatic identification and data capture (AIDC) technology that uses digital data encoded into a radio tag (or “smart label”) that is collected by a reader using radio waves. RFID is similar to another AIDC technology, bar code technology, but instead of optically scanning bar coded labels it uses radio waves to capture data from tags and no direct line of sight is required for this data exchanged between the tags and the readers. The key components of any RFID system, tags, are made up of three parts: ? microchip: holds the desired information, e.g., information about the physical object to which the tag is attached; ? antenna: transmits information to  a reader using radio waves; ? packaging: encases the previous components (chip and antenna) to permit attaching the tag to the desired physical object.   Tags use a variety of power sources: ? active tags – contain their own power source (a battery), that is used to run the microchip’s circuitry and to broadcast a signal to a reader; ? passive tags, that have no internal power source. Instead, they draw power from the reader; ? semi-passive tags, that use a battery to run the chip’s circuitry, but communicate by drawing power from the reader. Passive tags are undoubtedly less expensive than active tags and most companies are focusing on passive tags. RFID technology is emerging as a powerful and proven tool for streamlining production at manufacturing facilities of all sizes 3.  2.  [email protected]  Our research team implements an RFID_B2B system that brings together the B2B and RFID advantages and which in the near future could be a viable solution for the potential problems created due to the globalization process. Thus, the RFID_B2B system refers to the business relations in large enterprises, corporations and groups, as regards the control of the materials along their entire supply chain. The system suggests applying the RFID technology by using RFID 13.56 MHz High Frequency (HF) passive tags to identify materials and assemblies. Thus, based on the ID codes of the materials and assemblies, it is possible to control the content and the origin of any finite product, the content of assemblies and the origin of any constituent component, and so on, for each company which contributed to the creation of the finite product. By extending the system to the entire supply-chain – final producer, supplier, the manufacturer’s suppliers, etc. – the customer can follow the course of materials included in the final product, up to the primary sources. In order to accomplish this, all the necessary tracking information will be comprised in the tags attached to the materials, assemblies and finite products. 2.1.  General presentation  The presented system is a very complex one. The research team chooses to design a layered architecture arranged in such a way that the lower layers support and enable the upper layers. This architecture has some advantages: divide the complex system into several more manageable components, allow different groups to work on different layers concurrently etc. The RFID_B2B system is structured on three levels: the corporation level, the local level and data collection level at the material