These same RFID CARD standards are likely among other things, restrict the dissemination of another important wireless technology WiMAX. At the moment, in our country it was allowed "experimentation" as the apparatuses used for WiMAX are not widely circulated and the areas of interference can easily be mapped; but if in the future this technology would spread so widespread, many problems may arise.
It must be said that in the past the Ministry of Defence has agreed to surrender, even after compensation cost, some frequency bands that were necessary for civilian use: an example is the GSM network, the economic value of which was now well above at the policy level. At present, around the RFID / UHF economic interests gravitate still too skinny to assume a liberalization of the frequencies in the short term.
To take advantage of UHF technology, the Massachusetts Institute of Technology (MIT) has developed a communication protocol called EPC (Electronic Product Code), and managed by the consortium EPCglobal, which is specific to business-to-business in the field of logistics:
- Possesses a unique identifier in the world (SID); rfid inlay
- You can add to that identifier descriptive data of the bar code, such as the product code and the manufacturer;
- Transfers more information for each timeslot;
- Carries extra data such as ISO18000-3;
- No need for a double interrogation and specific software to provide replacement data of the barcode.
This protocol allows, with a single reading, to immediately get the product codes (previously entered) of the articles in the reading range, which with tags ISO18000 is not possible to do. This generates a difference in performance between the two technologies: a reader using ISO18000 2 time slot more time reading the EEPROM; a reader EPC provides all the necessary data for 16 tag with a single time slot. contactless cards
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