Short Interframe Space (original) (raw)
Short Interframe Space (SIFS), is the amount of time in microseconds 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
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| dbo:abstract | L'intervalle inter-trame court (short interframe space ou SIFS en anglais), est le temps (en microsecondes) nécessaire à une interface sans-fil pour traiter une trame et répondre avec une trame de réponse. Cet intervalle est défini par la différence de temps entre le dernier symbole d'une trame reçue, et le premier symbole envoyé en réponse sur le medium radio. Un intervalle SIFS correspond également à la somme du retard induit par le récepteur radio, par le , et par le traitement de la couche MAC. La durée de cet intervalle dépend de la couche physique utilisée. Dans les réseaux IEEE 802.11, l'intervalle inter-trame court est l'espacement qui précède la transmission: * d'une trame d'acquittement (ACK), * d'une trame Clear-To-Send (CTS), * d'un acquittement de bloc en réponse soit à une demande d'acquittement de bloc (BlockAckReq dans la norme), soit d'une A-MPDU * de la seconde ou subséquente MPDU d'un burst de fragment * de la réponse d'une station à une demande de la PCF (fr) Short Interframe Space (SIFS), is the amount of time in microseconds 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. (en) |
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| rdfs:comment | Short Interframe Space (SIFS), is the amount of time in microseconds 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 (en) L'intervalle inter-trame court (short interframe space ou SIFS en anglais), est le temps (en microsecondes) nécessaire à une interface sans-fil pour traiter une trame et répondre avec une trame de réponse. Cet intervalle est défini par la différence de temps entre le dernier symbole d'une trame reçue, et le premier symbole envoyé en réponse sur le medium radio. Un intervalle SIFS correspond également à la somme du retard induit par le récepteur radio, par le , et par le traitement de la couche MAC. La durée de cet intervalle dépend de la couche physique utilisée. (fr) |
| rdfs:label | Intervalle inter-trame court (fr) Short Interframe Space (en) |
| owl:differentFrom | dbr:CIFS |
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