ISO IEC 15963 pdf download – Information technology — Radio frequency identification for item management — Unique identification for RF tags

ISO IEC 15963 pdf download – Information technology — Radio frequency identification for item management — Unique identification for RF tags
Global uniqueness requires a central body (registration authority) to either assign manufacturer identities or toassign unique identities to various agencies that in turn assign manufacturer identities. Manufacturers thenassign unique identification to the chip, tag, or item.This standard serves as the central body for assignmentof unique identifiers to RF tags. This standard assigns various Allocation Classes to various agencies thatissue manufacturer codes.
Some tags only have identity down to a specific lot, batch，or mask identifier.Other tags, and asrecommended by this standard, are serialized so that all RF tags are globally unique from all other RF tags.
The combination of globally unique serialized tag (TID) programmed and locked at the time of manufacturer,with the unique item identifier (Uill) programmed when attached or associated with a specific item and trustedtrading partner communications are the cornerstones of several anti-counterfeiting techniques used within thesupply chain.
For anti-collision, inventorying, reading from, and writing to an RF tag, techniques exist to utilize the TID, UI,or a randomly generated number.Neither the Ull nor the randomly generated number provide life-cycletraceability for the RF tag.A TID does provide for such traceability
6Possible ways to uniquely identify an RF tag
When a unique identification of an RF tag is required, it can be done in several ways. The following sub-clauses list and explain some of them.
6.1Virtual lD
A virtual tag lD is a temporary ID based on tag parameters that may vary over the life of the tag. It may takeseveral forms. A virtual lD is also known as a logical lD or a session lD.Several tags could have the samevirtual lD at different times, but all tags at the same time for the same interrogator should have a differentvirtual ID, allowing an unambiguous identification of each tag at any time relative to any given interrogator.
The technical means to achieve and guarantee such uniqueness is outside of the scope of this InternationalStandard.However clauses 6.1.1,6.1.2, and 6.1.3 discuss possible approaches.
6.1.1Data as a unique lD
Data is a possible way to implement a virtual lD where the tag contains data that when read is unique in timeand location to a single tag. An example is a tag that contains date and time information. The time informationcan be unique to a single tag from a manufacturer, but is not guaranteed to be unique over all tags at alltimes.Another situation is a closed application where tag data describes only one set of information. Takenglobally, the tag bit pattern might be repeated, but in a closed application the tag data uniquely identifies asingle tag.
6.1.2Time as a unique lD
Time is a possible way to implement a virtual lD where bit patterns alone do not necessarily identify a singletag unambiguously.Tag response time slot can be part of a uniquely identifying parameter set. For example,some tags use time slots to differentiate between several tags appearing to a reader at the same time. lf thesetime slots are fixed for a single interrogation exchange, then the time slot may be used to help define a singletag at a particular time.
NOTE lf the time slots are randomly defined each time a tag responds，then time slots are not suitable fordetermining a unique tag ID.
6.1.3 Position as a unique ID In some applications, tag position may define a unique tag ID at a particular time. For instance, some tags have a read and write distance of only a few millimetres. In this case it is difficult to have more than one or two tags in the interrogation zone at any time. Thus any tag continually in the reading zone may be considered unique at that single time and location. A common example of this case is the tag used for fare collection on public transportation or telecommunication charges.