The MAC protocol remained almostly untouched during the upgrades. It
supports adhoc and infrastructure operation modes. In adhoc mode, the medium
access control is distributed among all mobiles while in infrastructure
mode a dedicated station (Access Point) seizes the access control. Both
modes of operation can co-exists since they are based on the same CSMA/CA
Figure 1: IEEE 802.11 simulation model structure
Basically, the model consists of a radio channel, a mobile station,
and several source modules. In addition, a access point module exists.
The mobile station module (as well as the Access Point module) consist
of almost only MAC functionality and simplified transmission functionality.
Almost every MAC sub-mechanism was implemented (e.g., MAC packet fragmentation/assembly,
NAV, RTS/CTS, access point scheduling, etc). A major yet missing feature
is the power save functionality which will be available soon.
A. Köpsel and J.-P. Ebert and A. Wolisz,
A Performance Comparison of Point and Distributed Coordination Function of an IEEE 802.11 WLAN in the
Presence of Real-Time Requirements,
in Proc. of 7th Intl. Workshop on Mobile Multimedia Communications (MoMuC2000),
October 23-26, 2000, Waseda, Tokio, Japan, postscript, pdf
J.-P. Ebert and A. Wolisz,
Combined Tuning of RF Power and Medium Access Control for WLANs,
to appear in Journal of Mobile Networks and Applications (Monet),
Baltzer Science Publisher, Netherlands, postscript, pdf
J.-P. Ebert and B. Stremmel and E. Wiederhold and A. Wolisz,
An Energy-efficient Power Control Approach for WLANs,
in Journal of Communications and Networks (JCN), publication ofKorean Institute of
Communications Sciences (KICS) , vol. 2, no. 3, pp. 197-206, September, 2000, postscript, pdf.
Please check here for the papers.