George is a security professional working for iTech Solutions. He was tasked with securely transferring sensitive data of the organization between industrial systems. In this process, he used a short-range communication protocol based on the IEEE 203.15.4 standard. This protocol is used in devices that transfer data infrequently at a low rate in a restricted area, within a range of 10-100 m.
What is the short-range wireless communication technology George employed in the above scenario?
A . MQTT
B . LPWAN
C . Zigbee
D . NB-IOT
Answer: B
Explanation:
Low-power WAN (LPWAN) could be a wireless wide space network technology that interconnects low-bandwidth, powered devices with low bit rates over long ranges.
Created for machine-to-machine (M2M) and net of things (IoT) networks, LPWANs operate at a lower value with bigger power potency than ancient mobile networks. they’re additionally ready to support a greater range of connected devices over a bigger space. LPWANs will accommodate packet sizes from ten to 1,000 bytes at transmission speeds up to two hundred Kbps. LPWAN’s long vary varies from a pair of kilometre to one,000 km, counting on the technology.
Most LPWANs have a star wherever, like Wi-Fi, every end point connects on to common central access points.
Types of LPWANsLPWAN isn’t one technology, however a bunch of assorted low-power, wide space network technologies that take several shapes and forms. LPWANs will use licenced or unauthorised frequencies and embody proprietary or open normal choices. The proprietary, unauthorised Sigfox is one among the foremost wide deployed LPWANs these days. Running over a public network within the 868 MHz or 902 MHz bands, the ultra-narrowband technology solely permits one operator per country. whereas it will deliver messages over distances of 30-50 kilometre in rural areas, 3-10 kilometre in urban settings and up to one,000 kilometre in line-of-site applications, its packet size is restricted to a hundred and fifty messages of twelve bytes per day. Downlink packets area unit smaller, restricted to four messages of eight bytes per day. causation information back to endpoints may also be vulnerable to interference.
Random part multiple access, or RPMA, could be a proprietary LPWAN from Ingenu INC. tho’ it’s a shorter vary (up to fifty kilometre line of sight and with 5-10 kilometre nonline of sight), it offers higher duplex communication than Sigfox. However, as a result of it runs within the a pair of.4 gigahertz spectrum, it’s vulnerable to interference from Wi-Fi, Bluetooth and physical structures. It additionally usually has higher power consumption than different LPWAN choices.
The unauthorised LoRa, nominative and backed by the LoRa Alliance, transmits in many sub-gigahertz frequencies, creating it less vulnerable to interference. A spinoff of chirp unfold spectrum (CSS) modulation, LoRa permits users to outline packet size. whereas open supply, the underlying transceiver chip accustomed implement LoRa is barely offered from Semtech Corporation, the corporate behind the technology. LoRaWAN is that the media access management (MAC) layer protocol that manages communication between LPWAN devices and gateways.
Weightless SIG has developed 3 LPWAN standards: The unifacial weightless-N, duplex Weightless-P and Weightless-W, that is additionally duplex and runs off of unused TV spectrum. Weightless-N and Weightless-P area unit usually a lot of in style choices because of Weightless-W’s shorter battery life. Weightless-N and Weightless-P run within the sub-1 gigahertz unauthorised spectrum however additionally support licenced spectrum operation mistreatment twelve.5 kilohertz narrowband technology.
Narrowband-IoT (NB-IoT) and LTE-M area unit each third Generation Partnership Project (3GPP) standards that treat the licenced spectrum. whereas they need similar performance to different standards, they treat existing cellular infrastructure, permitting service suppliers to quickly add cellular IoT property to their service portfolios.
NB-IoT, additionally referred to as CAT-NB1, operates on existing LTE and international System for Mobile (GSM) infrastructure. It offers transmission and downlink rates of around two hundred Kbps, mistreatment solely two hundred kilohertz of accessible information measure.
LTE-M, additionally referred to as CAT-M1, offers higher information measure than NB-IoT,
and therefore the highest information measure of any LPWAN technology.
Some vendors, as well as Orange and SK medium, area unit deploying each licenced and unauthorised technologies to capture each markets.
✑ GreenOFDM from GreenWaves Technologies
✑ DASH7 from hayrick Technologies INC.
✑ Symphony Link from Link Labs INC.
✑ ThingPark Wireless from Actility
✑ Ultra slim Band from numerous corporations as well as Telensa, Nwave and Sigfox
✑ WAVIoT
Other LPWAN technologies include:
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