School of Specs Ambient IoT — a tag with no batteryOverview

176 checked sources · Overview · 40 minutes

Ambient IoT — a tag with no battery

Ambient IoT is 3GPP's name for a device with no battery: it lives on the energy it can harvest from radio waves, light, motion or heat, and it stores what little it keeps in a capacitor. Sixteen groups have filed documents about it, across 179 meetings, and the paperwork now runs to 10771 documents against 37 named pieces of work. This course is for somebody who has to follow a conversation about that work — what it is meant to be, which group did which part, which documents were written, and how far each piece has got. Every number and every quotation here points at the file or the database row it was read from, and the last chapter is about what that record cannot tell you.

Start at chapter 1 Sit the final test

This course was built from a source register generated 2026-08-04.

Same subject, different depth: quick start · in depth

The chapters

Part 1 What the work is for

  1. 1 What Ambient IoT is meant to be The gap 3GPP wrote down in 2022, the definition it settled on, where the energy comes from, and what the first round of real work actually covers. 5 min
  2. 2 How an area of work like this runs Study, then normative work, then a second phase — the shape 3GPP work takes, with Ambient IoT walked through as the example, and the kinds of paper each step produces. 5 min

Part 2 Who did what

  1. 3 The map of the groups, and where the weight sat Sixteen groups, 10771 documents, 179 meetings — who filed what, who wrote the most letters, and the trap that makes these counts easy to add up wrongly. 5 min
  2. 4 The radio side and the architecture side What RAN and SA2 were each solving, the studies and work items each ran, and where the protocol groups pick the work up afterwards. 5 min
  3. 5 The specifications this work touches Fifty-three documents in three piles — the ones written for this work, the reports, and the 5G documents that had to be edited to let it in. 7 min

Part 3 Where it stands and how to follow it

  1. 6 Where the work stands Nineteen of 37 items at 100 per cent, every study but one finished, phase 2 still running — and what a completion percentage does and does not tell you. 5 min
  2. 7 How to follow it yourself, and what the record cannot tell you The short names to search for, the documents that decided things, the order to read the specifications in — and the eight things this record is silent about. 6 min

Testing yourself

Every question at once

33 questions, chapter by chapter, on one page — for revision after you have read the course.

Open all the questions

The final test

15 questions drawn across the whole course, marked at the end. 70 per cent to pass, and every miss says which chapter to go back to.

Sit the final test

What this course is built on

Chapters
7
Words written for you
7,485
Checked sources
176
Sources this course cites
156

Every source