Title :
IEEE 802.11 distributed coordination function (DCF): analysis and enhancement
Author :
Wu, Haitao ; Cheng, Shiduan ; Peng, Yong ; Long, Keping ; Ma, Jian
Author_Institution :
Nat. Key Lab of Switching Technol. & Telecommun. Networks, Beijing Univ. of Posts & Telecommun., China
Abstract :
Being a part of IEEE project 802, the 802.11 medium access control (MAC) is used to support asynchronous and time bounded delivery of radio data packets. It is proposed that a distributed coordination function (DCF), which uses carrier sense multiple access with collision avoidance (CSMA/CA) and binary slotted exponential backoff, be the basis of the IEEE 802.11 WLAN MAC protocols. This paper proposes a throughput enhancement mechanism for DCF by adjusting the contention window (CW) resetting scheme. Moreover, an analytical model based on Markov chain is introduced to compute the enhanced throughput of 802.11 DCF. The accuracy of the model and the enhancement of the proposed scheme are verified by elaborate simulations
Keywords :
IEEE standards; Markov processes; carrier sense multiple access; digital simulation; telecommunication standards; CSMA/CA; IEEE 802.11 WLAN MAC protocols; IEEE 802.11 distributed coordination function; IEEE project 802; Markov chain; binary slotted exponential backoff; carrier sense multiple access with collision avoidance; contention window resetting scheme; medium access control; simulation; throughput enhancement mechanism; Access protocols; Analytical models; Collision avoidance; Helium; Media Access Protocol; Multiaccess communication; Packet switching; Research and development; Telecommunication switching; Throughput;
Conference_Titel :
Communications, 2002. ICC 2002. IEEE International Conference on
Conference_Location :
New York, NY
Print_ISBN :
0-7803-7400-2
DOI :
10.1109/ICC.2002.996924
