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802.11 Beacon frame. A beacon frame is a type of management frame in IEEE 802.11 WLANs. It contains information about the network. Beacon frames are transmitted periodically; they serve to announce the presence of a wireless LAN and to provide a timing signal to synchronise communications with the devices using the network (the members of a service set).
In the IEEE 802.11 wireless LAN protocols (such as Wi-Fi), a MAC frame is constructed of common fields (which are present in all types of frames) and specific fields (present in certain cases, depending on the type and subtype specified in the first octet of the frame). Generic 802.11 Frame
Traffic indication map (TIM) is a structure used in 802.11 wireless network management frames.. The traffic indication map information element is covered under section 7.3.2.6 of 802.11-1999 standard.
In wireless networks, a beacon is a type of frame which is sent by the access point (or WiFi router) to indicate that it is on. Bluetooth based beacons periodically send out a data packet and this could be used by software to identify the beacon location.
Wireless network stacks must still be prepared to handle all possible values in the SSID field. Since the contents of an SSID field are arbitrary, the 802.11 standard permits devices to advertise the presence of a wireless network with beacon packets in which the SSID field is set to null.
IEEE 802.11 Wi-fi networks are the most widely used wireless networks in the world, connecting devices like laptops (left) to the internet through a wireless router (right). IEEE 802.11 is part of the IEEE 802 set of local area network (LAN) technical standards , and specifies the set of medium access control (MAC) and physical layer (PHY ...
IEEE 802.15.4 protocol stack. Devices are designed to interact with each other over a conceptually simple wireless network.The definition of the network layers is based on the OSI model; although only the lower layers are defined in the standard, interaction with upper layers is intended, possibly using an IEEE 802.2 logical link control sublayer accessing the MAC through a convergence sublayer.
IEEE 802.11k-2008 is an amendment to IEEE 802.11-2007 standard for radio resource measurement.It defines and exposes radio and network information to facilitate the management and maintenance of a mobile Wireless LAN.