CWNP 802-11 alternate phys whitepaper.pdf - CWNP 802.11 Alternate PHYs February 2018 802.11 Alternate PHYs A whitepaper by Ayman Mukaddam \u00a92018 CWNP

CWNP 802-11 alternate phys whitepaper.pdf - CWNP 802.11...

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CWNP 802.11 Alternate PHYs February 2018 CWNP 1005 Slater Road, Suite 101 • Durham, NC 27703 866-438-2963 • Page 1 of 12 802.11 Alternate PHYs A whitepaper by Ayman Mukaddam ©2018 CWNP, LLC
CWNP 802.11 Alternate PHYs February 2018 CWNP 1005 Slater Road, Suite 101 • Durham, NC 27703 866-438-2963 • Page 2 of 12 Contents Modern 802.11 Amendments ....................................................................................................................... 3 Traditional PHYs Review (2.4 GHz and 5 GHz PHYs) ..................................................................................... 3 802.11ad Directional Multi-Gigabit - DMG PHY ............................................................................................ 4 Frequency Band Used ............................................................................................................................... 4 Channel Plans ............................................................................................................................................ 5 Modulation Methods and Data Rates ....................................................................................................... 5 Use Cases .................................................................................................................................................. 6 802.11af TV High Throughput (TVHT) PHY ................................................................................................... 8 Frequency Band Used ............................................................................................................................... 8 Channel Plans ............................................................................................................................................ 8 Modulation Methods and Data Rates ....................................................................................................... 9 Use Cases .................................................................................................................................................. 9 802.11ah - Sub 1 GHz (S1G) PHY ................................................................................................................... 9 Frequency Band Used ............................................................................................................................... 9 Channel Plans .......................................................................................................................................... 10 Modulation Methods and Data Rates ..................................................................................................... 10 Use Cases ................................................................................................................................................ 12 Summary ..................................................................................................................................................... 12
CWNP 802.11 Alternate PHYs February 2018 CWNP 1005 Slater Road, Suite 101 • Durham, NC 27703 866-438-2963 • Page 3 of 12 Modern 802.11 Amendments Today, we live in the IoT (Internet-of-things) world where everything needs to be connected in a fast, reliable and secure manner. Different devices and applications have different requirements of the network in terms of data rates, range, and power. For example, while some devices require connectivity with very high throughput for a short range (less than 10m), other devices might require low throughput over a long range. The common 2.4GHz and 5 GHz Wi-Fi protocols (802.11a/b/g/n/ac) do not always provide the optimum connectivity method for these requirements. For this reason, several new 802.11 standards have been developed in the last several years to provide better connectivity solutions catering to these unique requirements. In this paper, we will address the traditional 802.11 2.4/5GHz standards. Then, we will discuss briefly three newer Wi-Fi amendments which are 802.11ad, 802.11af and 802.11ah and explain how they can provide better solutions to meet the new requirements. Traditional PHYs Review (2.4 GHz and 5 GHz PHYs) IEEE 802.11 Wireless Local Area Networks (WLANs), operating in 2.4 GHz and 5 GHz bands, are the most popular wireless technology in indoor environments. Today, they provide ubiquitous access with very high data rates and are easy to deploy at a low cost. IEEE 802.11 standards operating in these bands have evolved in the past 20 years from the original 802.11 standard to the latest 802.11ac, with 802.11ax on the horizon. The original 802.11-1997 standard offered 1 or 2 Mbps data rates using Frequency-Hopping Spread Spectrum (FHSS) and Direct-Sequence Spread Spectrum (DSSS) technologies. In 1999, 802.11b was introduced and it offered 11 Mbps data rates using High Rate –DSSS (HR/DSSS) technologies in the 2.4GHz band and also introduced a data rate of 5.5 Mbps. In 1999, the 802.11a amendment was ratified as well. Unlike 802.11b, this amendment worked in the 5 GHz band and it offered a maximum data rate of 54 Mbps by leveraging Orthogonal Frequency-Division Multiplexing (OFDM) modulation. In 2003, 802.11g was introduced and it enabled 54 Mbps maximum data rates in the 2.4 GHz band using OFDM modulation. It was also backwards compatible with 802.11b and supported DSSS modulation, because it operated in the 2.4 GHz frequency band. In 2009, 802.11n introduced major enhancements that

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