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Short Interframe Space (SIFS), is the amount of time in micro seconds required for a wireless interface to process a received frame and to respond with a response frame. It is the difference in time between the first symbol of the response frame in the air and the last symbol of the received frame in the air. A SIFS time consists of the delay in receiver RF, PLCP delay and the MAC processing delay, which depends on the physical layer used. In IEEE 802.11 networks, SIFS is the interframe spacing prior to transmission of an acknowledgment, a Clear To Send (CTS) frame, a block ack frame that is an immediate response to either a block ack request frame or an A-MPDU, the second or subsequent MPDU of a fragment burst, a station responding to any polling a by point coordination function and during contention free periods of point coordination function. == See also == * DIFS - DCF Interframe Space * RIFS - Reduced Interframe Space * PCF - Point Coordination Function * PIFS - PCF Interframe Space * EIFS - Extended interframe space 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Short Interframe Space」の詳細全文を読む スポンサード リンク
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