Dfs Wifi

Dynamic frequency selection dfs is a wifi function that enables wlans to use 5 ghz frequencies that are generally reserved for radars.

Dfs wifi. One main benefit of using dfs channels is to utilize under serviced frequencies to increase the number of available wifi channels. There is no definitive answer to this question. Wi fi networks operating in those bands are required to employ a radar detection and avoidance capability. The 2 4ghz band has a reputation of being something of a sewer of a band due to its limited number of usable channels the number of wi fi devices already using the band and the high levels of non wi fi interference that it experiences.

The primary benefit of using 5ghz is that under ideal conditions your wi fi will support up to 1300 mbps whereas 2 4 ghz wifi supports only a very fast 450 mbps or 600 mbps. For most people doing most things online 2 4 ghz may be enough but 5ghz is the future of wifi. Dfs is a spectrum sharing mechanism that allows wireless lans wlans to coexist with radar systems. Dfs when used in the context of wireless networking stands for dynamic frequency selection.

Dfs or dynamic frequency selection is a relatively new technology on select wi fi routers that helps in high congestion areas. Here s why you want it. In a three part series i ll examine dfs and the challenges it. Dynamic frequency selection dfs has been a topic of debate among wireless vendors and implementers alike.

Wi fi networking provides us with 2 bands for the operation of wireless lan networks. Wlan wireless local area network channels are frequently accessed using ieee 802 11 protocols and equipment that does so is sold mostly under the trademark wi fi other equipment also accesses the same channels such as bluetooth the radio frequency rf spectrum is vital for wireless communications infrastructure. Dfs has been a consideration since the first 5ghz wi fi standard 802 11a. Dfs is a feature of etsi bran hiperlan 2 and ieee standard 802 11h.

Dynamic frequency selection dfs is a channel allocation scheme specified for wireless lan commonly known as wi fi it is designed to prevent electromagnetic interference with other usages of the c band frequency band that had predated wi fi such as military radar satellite communication and weather radar. Dfs is a spectrum sharing technology which allows wi fi to operate in 5ghz frequency bands allocated to radar systems without causing interference. The ieee 802 11h standard addresses this requirement by adding support for dfs and transmit power control tpc on every dfs channel. But now the wider bandwidth channels used in 802 11ac compound the problems introduced by dfs.