Wireless and Cellular Telecommunications, Third Edition

Appendix E: Definitions of Functions in LAN and MAN

  • association: The service used to establish access point/station (AP/STA) mapping and enable STA invocation of the distribution system services (DSSs).

  • basic service set (BSS): A set of stations controlled by a single coordination function.

  • basic service set (BSS) basic rate set: The set of data transfer rates that all the stations in a BSS will be capable of using to receive frames from the wireless medium (WM). The BSS basic rate set data rates are preset for all stations in the BSS.

  • broadcast address: A unique multicast address that specifies all stations.

  • clear channel assessment (CCA) function: That logical function is the physical layer (PHY) that determines the current state of use of the wireless medium (WM).

  • coordination function: The logical function that determines when a station operating within a basic service set (BSS) is permitted to transmit and may be able to receive protocol data units (PDUs) via the wireless medium (WM).

  • elements of coordination function:

    coordination function. The coordination function within a BSS may have one point coordination function (PCF) and will have one distributed coordination function (DCF).

  • coordination function pollable: A station able to (1) respond to a coordination function poll with a data frame, if such a frame is queued and able to be generated, and (2) interpret acknowledgments in frames sent to or from the point coordinator.

  • disassociation: The service that removes an existing association.

  • distributed coordination function (DCF): A class of coordination function where the same coordination function logic is active in every station...

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