Abstract
Wireless local area networks (WLANs) are widely deployed for Internet-centric data applications. Due to their extensive norm in our day-to-day wireless-enabled life, WLANs are expected to play a vital role for Internet of Things (IoT). It is predicted that by 2020, about 50 billion devices (things) will be connected via IoT. Consequently, WLANs need major improvements in both throughput and efficiency for such a massive device deployment in applications like smart offices, smart train stations, and smart stadiums for smart cities in IoT. New technologies continue to be introduced for WLAN applications for this purpose. The IEEE 802.11ac standard is the currently implemented amendment by the IEEE 802.11 standard working group that promises data rates at gigabits per second. The main features of the IEEE 802.11ac standard are adopting increased bandwidth and higher order modulation than the previous standards, and multiple-input, multiple-output (MIMO) and multiuser MIMO transmission modes. These features are designed to improve the user experience. In addition to technologies that enhance the efficiency of the WLAN, the IEEE 802.11ax High Efficiency WLAN (HEW) standard is also investigating and evaluating advanced wireless technologies to utilize the existing spectrum more efficiently.
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