Every question of this course

Q1.1 What powers an Ambient IoT device?

• A small battery replaced once every ten years
• Power sent down a cable from the nearest mast
• Energy harvesting, with no battery at all or a capacitor holding a little charge

The founding study says "powered by energy harvesting, being either battery-less or with limited energy storage capability (i.e., using a capacitor)". what an Ambient IoT device is, in the founding study

Q1.2 Which sources of energy did the first study name?

• Only radio waves sent by the network
• Radio waves, light, motion, heat, or any other power source that could be seen suitable
• Solar panels alone

The study left the list open on purpose, naming four sources and then "any other power source that could be seen suitable". what the first study set out to do

Q1.3 How much power is the radio design aimed at?

• About one watt at peak
• About one microwatt at peak
• About one kilowatt at peak

The radio study's scope names devices of "~1 µW peak power consumption, has energy storage". the scope of the RAN solutions study report

Q2.1 Which group filed the most Ambient IoT documents?

• RAN1, the radio group, with 2421
• CT4, which owns nine of the affected specifications
• SA1, the group that writes what a system must do

RAN1 filed 2421 and SA2 filed 2125. The next group, SA3, filed 1349. RAN1

Q2.2 In what order does the work move between the groups?

• The exact messages first, then architecture, then requirements
• All three at once, by agreement
• Requirements first, then architecture, then the exact messages on the wire

The architecture study says it works "based on the services requirements defined in 3GPP SA1", and the protocol work says stage 3 may start only after the stage 2 work is available. what the architecture study set out to do

Q2.3 Which group has stopped filing Ambient IoT documents?

• SA5, which never started
• RAN1, whose last one is from 2026-06-10
• SA1, whose last one is from 2025-05-09

SA1 wrote the requirements, finished them, and filed its last Ambient IoT document on 2025-05-09. SA1

Q3.1 How many specifications does this work touch?

• 37
• 53
• 15

53 are touched. Fifteen of those were written for this work; 37 is the number of named pieces of work, not documents. 53 specifications are touched by Ambient IoT

Q3.2 What is the difference between a TS and a TR?

• A TS tells you what to build; a TR studies a question and is then closed
• A TS is public and a TR is not
• A TS is written by a plenary and a TR by a working group

Nobody builds from a report. It records how a question was settled, and the specification that follows it is a separate document. TR 22.840

Q3.3 What can be said about Rel-20 phase 2?

• It has been abandoned
• It is running — eleven items sit between 0 and 70 per cent against target dates
• It is finished

Those dates are targets held in a work plan, not recorded outcomes. The data supports neither "finished" nor "failed". AmbientIoT_Ph2-ARC

Q4.1 What is the right thing to type into a 3GPP document search?

• The words "battery free tag"
• The name of the company that proposed it
• The short name of the piece of work, such as AmbientIoT-ARC

Every document is filed against a short name, so the short name is the only search that returns the whole conversation. 37 Ambient IoT work items and study items

Q4.2 Four pieces of work each show 959 documents. Why?

• They share one short name, and the count is per short name
• The database counted them wrongly
• Each of the four filed 959 of its own

Counts are per short name, so the same 959 documents appear against each of the four. Adding them gives a meaningless number. AmbientIoT-CT

Q4.3 What does this record hold about why a group decided something?

• The vote counts
• Nothing beyond the outcome word beside a document number
• A short summary of the debate

Approved, agreed, revised, noted, merged or withdrawn — and no reasoning behind any of them. SP-220085