AIFSN – Arbitration Interframe Space Number
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AIFSN – Arbitration Interframe Space Number

This is a term used in IEEE (Institute of Electrical and Electronics Engineers) 802.11 networks which are supporting the QoS (Quality of Service) enhancements originally defined in the 802.11e standard. This parameter, which is transmitted from the AP (Access Point), is used by a station in order to determine the specific AIFS (Arbitration Interframe Space) value for each of the four EDCA (Enhanced Distributed Channel Access) classes.

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