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Registry (continued) - Allocation of Identifiers

In this manner:

  • All identifiers allocated to a client-system are serial sequential as shown in Figure 3 opposite.
  • The first identifier of the first allocation to a client-system is the identifier by which that particular client-system is henceforth identified.
  • Administration of the allocation of identifiers from the registry for all client-systems is greatly simplified because one only needs to record, for any client system, the first and the last identifier allocated to any particular client-system.
Universality. This system of unique item identification can co-exist with any other system of generic or individual identification, such as GS1, manufacturer's parts numbers, transport tracking numbers or wholesale product numbers.  It points to a computer record and from this record any amount of information about that entity may be obtained.

Efficiency.  Unlike other systems of unique item identification, such as GS1, this system has been found, in the field during trials, to require around 60% less labour than, say GS1, to label or tag items for the purposes of identification.  This is because the tag or label does not have to be matched up to a specific item.  Instead, the item is tagged or labelled with any identifier and then, using a hand-held reader, the identifier is associated with the entity when its displayed on a list within the database.

Two Dimensional Bar Code

NU-ERA Bar Code

Figure 4. Example of a NU-ERA 2D Bar Code

Purpose of Novel Bar Code Symbology.  The Bar Code Symbology, displayed in Figure 4, was developed to:

  • Be novel such that it could be patented. This would allow the enforcement of a licence condition that the NU-ERA barcode may only be used when representing identifiers drawn from the NuEra-ID unique identifier registry.
  • Represent a 128 bit binary identifier of which 96 bits would be the "payload".  96 bits of data provides an identifier range from 0 to 79,228,162,514,264,337,593,543,950,336.  In other words, it would be possible to issue from the NuEra-ID registry one million, billion unique identifiers per annum for approximately 79,228,162,514,264 years (~79 thousand billion years).  Provided these identifiers were efficiently allocated, this range provides for an inexhaustible supply of unique identifiers.
  • Be highly resistant to dirt and damage.  This was achieved through large-scale redundancy.  The redundant pattern also facilitated the identification of a barcode in the field of view of an image sensor by the image processing circuitry.

  • Provide a barcode with a low probability of erroneous read.  This would be achieved through using a 32 bit error code.
  • Consist only of dots. Being so it could be printed or etched using inexpensive equipment.  Having only dots is particularly suited to engraving items with the barcode using a simplified laser etching system.
NU-ERA Damaged Tag Thumbnail

Figure 5. Example of a Readable Damaged Tag

Figure 5 provides an example of the robustness of the NU-ERA Bar Code.  This robustness is achieved through the use of largescale redundancy, error detection (to determine if one of the arrays actually yields a valid value) and the processor "overlaying" arrays to determine the strongest summated signal from any "dot" making up each of the overlapped arrays.  Other systems such as Reed-Solomon encoding could be used for this purpose and may indeed be a more efficient use of dots but the redundancy also serves a another function and that is to assist the image processor speedily find a barcode pattern in the field of view of the image sensor.

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