LPWAN

A low-power, wide-area network (LPWAN or LPWA network) is a type of wireless telecommunication wide area network designed to allow long-range communication at a low bit rate between IoT devices, such as sensors operated on a battery.

Low power, low bit rate, and intended use distinguish this type of network from a wireless WAN that is designed to connect users or businesses, and carry more data, using more power. The LPWAN data rate ranges from 0.3 kbit/s to 50 kbit/s per channel.

A LPWAN may be used to create a private wireless sensor network, but may also be a service or infrastructure offered by a third party, allowing the owners of sensors to deploy them in the field without investing in gateway technology.

Attributes

# Range: The operating range of LPWAN technology varies from a few kilometers in urban areas to over 10 km in rural settings. It can also enable effective data communication in previously infeasible indoor and underground locations.
# Power: LPWAN manufacturers claim years to decades of usable life from built-in batteries, but real-world application tests have not confirmed this.

Platforms and technologies

Some competing standards and vendors for LPWAN space include:

* DASH7, a low latency, bi-directional firmware standard that operates over multiple LPWAN radio technologies including LoRa.
* Wize is an open and royalty-free standard for LPWAN derived from the European Standard Wireless Mbus.

* Chirp spread spectrum (CSS) based devices.

* Sigfox, UNB-based technology and French company.

* LoRa is a proprietary, chirp spread spectrum radio modulation technology for LPWAN used by LoRaWAN, Haystack Technologies, and Symphony Link.
* MIoTy, implementing Telegram Splitting technology.

* Weightless is an open standard, narrowband technology for LPWAN used b
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* ELTRES, a LPWA technology developed by Sony, with transmission ranges of over 100 km while moving at speeds of 100 km/h.
* IEEE 802.11ah, also known as Wi-Fi HaLow, is a low-power, wide-area implementation of 802.11 wireless networking standard using sub-gig frequencies.

Ultra-narrow band

Ultra Narrowband (UNB), modulation technology used for LPWAN by various companies including:
* Sigfox, French UNB-based technology company.
* Weightless, a set of communication standards from the Weightless SIG.
* NB-Fi Protocol, developed by WAVIoT company.

Others

* DASH7 Mode 2 development framework for low power wireless networks, by Haystack Technologies. Runs over many wireless radio standards like LoRa, LTE, 802.15.4g, and others.
* LTE Advanced for Machine Type Communications ( LTE-M), an evolution of LTE communications for connected things by 3GPP.
* MySensors, DIY Home Automation framework supporting different radios including LoRa.
* NarrowBand IoT (NB-IoT), standardization effort by 3GPP for a LPWAN used in cellular networks.
* Random phase multiple access (RPMA) from Ingenu, formerly known as On-Ramp Wireless, is based on a variation of CDMA technology for cellular phones, but uses unlicensed 2.4 GHz spectrum. RPMA is used in GE's AMI metering.
* Byron, a direct-sequence spread spectrum (DSSS) technology from Taggle Systems in Australia.
*Wi-SUN, based on IEEE 802.15.4g.

See also

* Internet of things
* Wide area networks
* Static Context Header Compression (SCHC)
* QRP operation
* Slowfeld
* Through-the-earth mine communications
* Short range device
* IEEE 802.15.4 (Low-power personal-area network)
* IEEE 802.16 ( WiMAX)

References

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Wide area networks
Wireless networking