HF Protocols’ Distant Dream
Although HF RFID air-interface protocols operate at a single global frequency, a number of factors hinder the ability of HF tags and readers to achieve interoperability.
By John Schroeter
Feb. 12, 2007—While the many high-frequency (HF) RFID air-interface protocols enjoy global operation at a single frequency (13.56 MHz), the problem is that none of them are compatible, let alone interoperable. These protocols include ISO 14443A, ISO 14443B, ISO 15693, ISO 18000-3 Mode 2 and EPCglobal HF Class 1. And, as one might expect, each has its own data structures, requires infrastructures that are incompatible, and often operates on readers with nonstandard features and functionality. This results in a proprietary platform rather than a standards-based model.
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