RFID is the ability to detect the presence of a tag and to uniquely identify that tag. All RFID systems can perform these simple tasks: identification and presence detection. The range or distance from tag to reader, also known as access point or gateway, at which this task can be performed depends on the technology being used. Passive RFID's maximum range is about 20-30 feet (6-10 meters) while active RFID can achieve ranges of several thousand feet. Aside from presence detection and identification of tags, RFID is able to perform various types of locating. Both passive and active technologies are capable of performing basic chokepoint locating while the RTLS technology which is built upon active RFID technology, is capable of performing more sophisticated precision locating.

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This white paper discusses a proposed enhancement to the DASH7 specification that is being discussed among DASH7 Alliance members who are interested in adding real-time locating and Tag to Tag communications capabilities to the DASH7 specification. It is the first of many proposed enhancements to DASH7 and is for discussion purposes only. The DASH7 Alliance has been formed to address interoperability of products adhering to the ISO 18000-7 standard. This alliance consists of a global network of partners with a vision to increasing the market size and acceptance of products within the 433MHz frequency band and specifically those using ISO 18000-7 as the backbone for their technology delivery.

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