Cellular technologies
Last updated
Last updated
Two strategies, for different scenarios.
No MIMO for lower end device energy.
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.
