This is a course note of UCSD’s Coursera: Internet of Things: How did we get here?
Two demos are shown: Sonification of Movement and Healthcare Remote Monitoring, which demonstrates the simple mechanism as well as the huge potential of IoT technology.
An interesting part is that Snapdragon is advocated in the lecture and Qualcomm gets involved.
Module 1 (Circuit Switch)
Lesson 1 - Telephony Networks
Star shape network. Invention of Triode.
Lesson 2 - Broadcast Networks
The story between Lee de Forest, Edwin Howard Armstrong and David Sarnoff is quite attractive.
Lesson 3 - AT&T Innovations
Some innovations from AT&T (Bell Labs): Information Theory, Transistor, C and UNIX.
Lesson 4 - Rise and Fall of AT&T
Lawsuit from the Department of Justice and Monopoly of AT&T.
Module 2 (Packet Switch)
Lesson 1 The Internet Initiative
ARPA net and IETF
Lesson 2 Reliable Services
Email and browser.
Lesson 3 Realtime Services
VoIP and Multicast.
Module 3 (Computer Telephony)
Lesson 1 Telephony goes digital
Data plane and control plane
Companding is a very useful tool in data plane to reduce the dynamic of signal while transmiting.
Lesson 2 Shifting Landscapes
Lesson 3 So, what’s the Big Deal!
Lesson 4 A Word of Caution!
Dial tone. 911 Fiasco.
Module 4 (Wireless Technologies)
Lesson 1 Teleophony goes Wireless
The failure story of AT&T and McKinsey
Lesson 2 Mobility and the Control Plane
The SS7 can be use in cellphone network to achieve mobility.
Why cellphone market goes beyond expectation: one reason is prepaid phone which credits to a well designed billing system.
Lesson 3 Air Interface (1G, 2G, 3G and 4G)
How to maintain so many communications:
Get more spectrum
Improve Spectural Efficiency (TDMA, CDMA)
Reduce data rate for each voice call (LPC)
3G and 4G
Lesson 4 Radios, Radios, and Radios
Wi-Fi, Bluetooth, ZIgBee, RFID
Lesson 5 Network Revisited
- Telephony 1-to-1
- Broadcast 1-to-N
- Sensor Network N-to-1
- A platform for IoT
Module 5 (Features and Apps)
Lesson 1 Features and Apps
911, GPS, Cameras, Accelerators
Lesson 1 Specification Overview
A very interesting definition of IoT, shows how plain things get magical when connected.
Lesson 2 Future Applications
A very interesting study from Fitbit that how much sleep are disturbed due to to the Berkeley earthquake.