Big data through small messagesIOT & BIG DATA MEET UP - 2016.04.21

About Sigfox

Sigfox is not selling chips

Sigfox is not building connected solutions

Sigfox has invented a radio protocol

Sigfox operates a global network

Core concepts

Energy efficiency

The Sigfox protocol has been designed to maximise energy

efficiency

Tx: ~20-35 mA during a few seconds (25mW ; 14dB)

Key factor: idle consumption (unconnected 99.x% of the time)

Idle consumption: a few µA

Out of the box

No configuration, no pairing, no signalisation

The network is serving the devices, not the other way round

A message is picked up by several base stations ; validation &

reduplication are handled by the network

Very Long Range

Best case scenario

+100km between transmitter & receiver (base station)

Real life

A few kms (city) to tens of kms (countryside), depending on

the topography

Outdoor & Indoor

Sigfox works well indoor

Of course, you need to consider signal attenuation (~20dB)

Two-way communication

Devices can receive updates sent from your application server

Each communication is instigated by the device

Security

Each message is signed with a key unique to the device

Messages can be encrypted or scrambled

No keys exchanged over the network, no handshake

Security is an ever ongoing effort

Radio properties

Great tolerance to interferors

Jamming resistant

Interception is hard: UNB & frequency diversity

Jammers

Interferors

Low cost of communication

Small subscription fees

Short SW development cycle

Low cost HW components

Small messages

Useful payload: 12 bytes

Up to 140 times each day

100 bits/s

Payload examples

GPS coordinates (lat x lng) : 6 bytes

Temperature: 2 bytes

State reporting : 1 byte

Heartbeat, update request : 0 byte

And … who needs full bytes when 5 bits are enough ?

Payload examples

A (int): 17568 —> 0100010010100000

B (0-32): 17 —> 010001

C (state): 3 —> 10

Frame: 01000100 10100000 01000110

Frame: 0x44 0xA0 0x46

AT$SF=44A046

More !

816b1954 | 10000001 01101011 00011001 01010100

10000001 01101011 00011001 01010100 Active mode (Temp)

10000001 01101011 00011001 01010100 Temp. MSB & LSB

10000001 01101011 00011001 01010100 Humidity x2

Temp : 0110011001 = 409 . (409-200) / 8 = 26.125°C

Humidity: 01010100 = 84. 84/2 = 42%

Big Data with 12 bytesSERIOUSLY ?

Small messages

… But a lot of them

Figures

7 million devices currently registered on the Sigfox network

2025 : estimates ranging from 25 to 50 billion IoT devices

Tools

Machine learning

Analytics

Data

Why ?

Network Operation & Predicted Maintenance

New services

Example

Monitoring payload size distribution over time

Current

Trend

We’re hiring

Looking for Senior Data Scientist to join our Paris team

Get in touch if interested :)

Thank you !

Nicolas Lesconnec

nicolas.lesconnec@sigfox.com

twitter: @nlesconnec

Q&A time :)