Cellular technologies

Two strategies, for different scenarios.

• No MIMO for lower end device energy.

SigFox

Provide and maintain a PAID connectivity platform.

• Ultra Narrow Band: 100Hz per message.

• Ultra Low Bit rate: 12 byte messages, 140 messages per day (max!).

• Long Range: ~50KM.

• Sensors lasting 10 years.

• Only provides connectivity, access control and a broker.

Business Model: connectivity service for alarms, smart meters, etc...

Low Power Wide Area Sensor Network (LPWASN).

Thousands of millions.

• A million per access point.

Proprietary comercial.

• You have to use its access infrastructure (built with operators) and software.

• Open market for the endpoints.

30-50km range in rural areas, and 3-10km range in urban.

Ultra narrow band, 868 (EU) or 902 (US) frequency (MHz).

Low energy consumption.

Dedicated network.

Each device can send up to 140 messages per day.

• Payload: 12 octets (~96 bytes).

• Datarate: up to 100bps.

(Duty cycle: the time occupied by the operation of a device, which operates intermittently).

• Common in the IoT.

Sigfox exploits this:

• When a device has a message to be sent, the Sigfox interface wakes up, and the message is transmitted uplink.

• Then, the device listens for a short duration, if there is data to be sent to it.

• This is good for data acquisition scenarios.

• But not so good for command-and-control situations.

Use cases:

• Smart meters, smoke detectors.