The Internet of things is a system of interrelated computing devices, mechanical and digital machines provided with unique identifiers and the ability to transfer data over a network without requiring human-to-human or human-to-computer interaction.
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IoT Communications
IoT Communications
Professional Mobile Radio (PMR):
PMR network is a wireless network.
PMR network is not accessible to the general public.
PMR network frequency and the associated bandwidth is allocated for a user in the given period.
Frequency bands in PMR are 40MZ, 80MZ, 150MZ, 400MZ.
In the PMR network, both analog and digital technologies are used and cover area form 30km up to wide-area coverage.
2.5G / 3G / 4G:
These are the public networks.
The coverage area is broad.
2.5G throughput is 8 to 40kbps (GPRS or EDGE)
3G throughput is 2Mbps (Moving) or 383kbps (Not Moving)
4G throughput is 100Mbps or more (LTE)
Satellite Communication:
In satellite communication, network communication can be done through Geostationary Orbits (36,000 km above the earth) and Low Earth Orbit.
Zig Bee:
This network is managed by the Zigbee Alliance.
It is a low power network.
The coverage area range is up to 10 meters.
Mesh network topology is used.
Z Wave:
This network is managed by the Z wave Alliance for home automation.
It is also a low power network.
It can cover up to 30 meters range area.
Mesh network topology is used.
Leased Lines:
In this network, there is a permanent connection established between two locations.
Analog or digital data can be sent.
PSTN:
The full form of PSTN is the Public Switching Telephone Network.
PSTN requires Modem i.e. Modulator and Demodulator.
The data rating is up to 56kbps.
The cost is proportional to duration.
Setup time is long.
WI-FI:
Wi-Fi is the name of a wireless networking technology that uses radio waves to provide wireless high-speed Internet and network connections.
A common misconception is that the term Wi-Fi is short for "wireless fidelity," however this is not the case.
Wi-Fi is simply a trademarked phrase that means IEEE 802.11x.
Wi-Fi alliance owns the brand range usually up to 100 meters outdoors.
Bluetooth:
Originally designed to replace serial cables.
Bluetooth is a wireless technology standard used for exchanging data between fixed and mobile devices over short distances.
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