![]() ![]() However, there is a big misconception that data rates are the same as the actual throughput. 802.11ac also introduced a multi-user technology known as multi-user MIMO (MU-MIMO) however, the implementation has been sparse.Īs you can see, over the years, the main emphasis has been on faster speeds and higher data rates to meet the high-density demands in enterprise WLANs. Although data rates of up to 6.93 Gbps are theoretically possible with 802.11ac, data rates of up to 400 – 800 Mbps are more likely in the real world. ![]() Introduced in 2013, 802.11ac expanded and simplified many of the technologies of 802.11n: Even higher data rates prevailed however, 802.11ac only operates in the 5 GHz frequency band. By 2012, wireless mobile devices such as smartphones surpassed personal computer sales. We went from a time when an RF phenomenon known as multipath became constructive instead of destructive. 802.11n was the last significant paradigm shift in Wi-Fi technology when we switched from single-input single-output (SISO) radios to multiple-input multiple-output (MIMO) radios. The 802.11n standard also brought about faster theoretical data rates of up to 600 Mbps and supported both 2.4 and 5 GHz devices. The 802.11n standard followed in 2009, delivering 100 Mbps of usable throughput. In 2007, Apple introduced the first iPhone, and the smartphone became a modern reality. The 802.11g standard was subsequently ratified, delivering up to 54 Mbps speeds on the 2.4 GHz frequency band. By 2003, Wi-Fi-enabled mobile devices were introduced in the market, and portable laptops became common for business and personal use. 802.11b, the most commonly used standard at the time, had very low speeds - only up to 11 Mbps (much lower than most Ethernet wired networks - but there were no Wi-Fi mobile devices and very few laptops, so 11 Mbps was fast enough. In 1999, wireless was commercially introduced as a “nice to have” feature with the 802.11a and 802.11b ratifications. Wi-Fi 6 also uses a new client power-saving mechanism that schedules wake-times to improve client battery life. Wi-Fi 6 handles client density more efficiently through a new channel-sharing capability that promises true multi-user communications on both the downlink and uplink. Wi-Fi 6 technology is all about better and more efficient use of the existing radio frequency medium. Wi-Fi 6 (also known as 802.11ax) is the new generation of Wi-Fi technology with a new focus on efficiency and performance. Most Wi-Fi devices used 802.11g throughout the 2000s until the 802.11n standard was published in 2009.Previous generations of Wi-Fi (going back about 20 years) focused on increasing data rates and speed. 802.11g consolidated the previous 802.11 "a" and "b" specifications into a single standard that was backward-compatible with 802.11b devices. In 2003, the IEEE published the 802.11g standard, which provides wireless transfer rates of up to 54 Mbps. While 802.11b provided similar data transfer rates as 10Base-T Ethernet, it was slower than newer wired LAN standards, such as 100Base-T and Gigabit Ethernet. Therefore, the speed was typically only a limitation for internal data transfers within a network. In the late 1990s, this was significantly faster than Internet speeds available to most homes and businesses. It supports transfer rates up to 11 Mbps, or 1.375 megabytes per second. The 802.11b Wi-Fi standard provides a wireless range of roughly 35 meters indoors and 140 meters outdoors. ![]() Both 802.11a and 802.11b are wireless transmission standards for local area networks, but 802.11a uses a 5 GHz frequency, while 802.11b operates on a 2.4 GHz band. It was released in 1999 along with 802.11a as the first update to the initial 802.11 specification, published in 1997. 802.11b is one of several Wi-Fi standards developed by the Institute of Electrical and Electronics Engineers ( IEEE). ![]()
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