Problem 2-1. “Singulation” is the process by which an RFID reader identifies and

Question

Problem 2-1.

“Singulation” is the process by which an RFID reader identifies and communicates with a single RFID transponder.

(a) Briefly explain the purpose and motivation of singulation.

(b) Two singulation methods are tree-walking and an Aloha MAC. Which method is preferable in a densly populated RFID environment? Explain your answer.

(c) Assume an eavesdropping adversary Eve is able to passively intercept the forward signal (from the reader), but not the response from the tags. Which method of singulation is preferable against such an adversary? Explain your answer.

(d) An RFID “blocker tag” is a device designed to increase privacy by responding to every interrogation request during tree-walking. Assuming d = 64 bit tag identifiers, how many interrogation requests will be made during singulation when a blocker tag is present? Explain your answer.

Explanation / Answer

Purpose of singulation:

Singulation could be a methodology by that AN RFID reader identifies a tag with a particular serial variety from variety of tags in its field. This is often necessary as a result of if multiple tags respond at the same time to a question, they're going to jam one another. In an exceedingly typical industrial application, like scanning a bag of groceries, doubtless many tags may well be inside vary of the reader.
When all the tags collaborate with the tag reader and follow a similar anti-collision protocol, conjointly known as singulation protocol then the tag scanner will read knowledge from every and each tag while not interference from the opposite tags.
An rising trend to UPH improvement is that the use of multiple blade or gang sawing techniques. ... Single blade singulation, or dicing, could be a typical wafer-dicingsaw method that uses one blade to chop or separate every row and column of devices from the substrate.
Motivation of singulation:
Generally collision happens once 2 entities need the identical resource; for instance, 2 ships with crossing courses in an exceedingly narrows. In wireless technology, collision happens once 2 transmitters transmit at a similar time with a similar modulation theme on a similar frequency. In RFID technology, varied ways are developed to beat this dangerous scenario.Therefore singulation is to beat these reasonably collision issues.

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