BSS transition by disassociating from the current access point and associating with the new one, including authentication and establishing the required QoS. Chapter Six Table 6-13: 802.11k Measurements and Reports 802.11k feature Description Beacon report Access points will use a beacon request to ask a station to report all the access point beacons it detects on a specified channel. Details such as supported services, encryption types and received signal strength will be gathered. Channel reports (noise Access points can request stations to construct a noise histogram, medium histogram showing all non-802.11 energy detected on a sensing time histogram specified channel, or to report data about channel loading report and channel (how long a channel was busy during a specified time load report) interval as well as the histogram of channel busy and idle times). Hidden station report Under 802.11k, stations will maintain lists of hidden stations (stations that they can detect but are not detected by their access point). Access points can request a station to report this list and can use the information as input to roaming decisions. Station statistic report 802.11k access points will be able to query stations to and frame report report statistics such as the link quality and network performance experienced by a station, the counts of packets transmitted and received, and transmission retries. Site report A station can request an access point to provide a site report - a ranked list of alternative access points based on an analysis of all the data and measurements available via the above reports. 802.11r; Fast BSS Transitions The speed and security of transitions between access points will be further enhanced by the 802.11 specification which is also under development and is intended to improve WLAN support for mobile telephony via VoWLAN. IEEE 802.11r will give access points and stations the ability to make fast BSS to BSS transitions through a four-step process; Active or passive scanning for other access points in