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The IEEE 802.11 family of standards describe the DCF protocol, which controls access to the physical medium. A station must sense the status of the wireless medium before transmitting. If it finds that the medium is continuously idle for DCF Interframe Space (DIFS) duration, it is then permitted to transmit a frame. If the channel is found busy during the DIFS interval, the station should defer its transmission. DIFS duration can be calculated by the following method. DIFS = SIFS + (2 * Slot time)

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  • The IEEE 802.11 family of standards describe the DCF protocol, which controls access to the physical medium. A station must sense the status of the wireless medium before transmitting. If it finds that the medium is continuously idle for DCF Interframe Space (DIFS) duration, it is then permitted to transmit a frame. If the channel is found busy during the DIFS interval, the station should defer its transmission. DIFS duration can be calculated by the following method. DIFS = SIFS + (2 * Slot time) IEEE 802.11g is backward compatible with IEEE 802.11b. When these devices are associated with same AP all the timing parameters are changed to 802.11b. (en)
  • Le DCF Interframe Space (DIFS) est l'un des intervalles inter-trames utilisé par les réseaux WLAN de la norme IEEE 802.11. Une station ayant activé le DCF doit sonder le medium pendant une durée d'un DIFS. Si pendant cet intervalle, aucun trafic n'est détecté, la station est autorisée à transmettre. Sinon, elle doit reporter sa transmission. Cet intervalle fait partie de la méthode d'accès CSMA/CA qui permet de partager un réseau 802.11 (Wi-Fi) entre plusieurs stations. Le DIFS peut être calculé de la manière suivante : La norme IEEE 802.11g est rétrocompatible avec la norme IEEE 802.11b. Quand un appareil 802.11b est associé à un point d'accès 802.11g, les valeurs du DIFS changent pour celles de 802.11b. (fr)
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  • The IEEE 802.11 family of standards describe the DCF protocol, which controls access to the physical medium. A station must sense the status of the wireless medium before transmitting. If it finds that the medium is continuously idle for DCF Interframe Space (DIFS) duration, it is then permitted to transmit a frame. If the channel is found busy during the DIFS interval, the station should defer its transmission. DIFS duration can be calculated by the following method. DIFS = SIFS + (2 * Slot time) (en)
  • Le DCF Interframe Space (DIFS) est l'un des intervalles inter-trames utilisé par les réseaux WLAN de la norme IEEE 802.11. Une station ayant activé le DCF doit sonder le medium pendant une durée d'un DIFS. Si pendant cet intervalle, aucun trafic n'est détecté, la station est autorisée à transmettre. Sinon, elle doit reporter sa transmission. Cet intervalle fait partie de la méthode d'accès CSMA/CA qui permet de partager un réseau 802.11 (Wi-Fi) entre plusieurs stations. Le DIFS peut être calculé de la manière suivante : (fr)
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  • DCF Interframe Space (en)
  • DCF Interframe Space (fr)
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