Using a distributed coordination function (DCF), the CSMA/CA protocol reduces collisions and improves the overall throughput in the IEEE802.11 WLAN. To mitigate fairness issues arising with CSMA/CA, we develop a modified version that we term CSMA/CCA (CSMA with copying collision avoidance). A station in CSMA/CCA contends for the shared wireless medium by employing a binary exponential backoff similar to CSMA/CA. Different from CSMA/CA, CSMA/CCA copies the contention window (CW) size piggybacked in the MAC header of an overheard data frame within its basic service set (BSS), and updates its backoff counter according to the new CW size. Simulations illustrate that CSMA/CCA improves fairness relative to CSMA/CA and offers considerable advantages for deployment in the 802.11 standard based WLANs.
|Original language||English (US)|
|Number of pages||8|
|State||Published - 2005|
|Event||2005 1st InternationalConference on Multimedia Services Access Networks, MSAN05 - Orlando, FL, United States|
Duration: Jun 13 2005 → Jun 15 2005
|Other||2005 1st InternationalConference on Multimedia Services Access Networks, MSAN05|
|Period||6/13/05 → 6/15/05|