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Overhaul of IEEE 802.11 modeling and simulation in NS-2
Autor: Q. Chen, F. Schmidt-Eisenlohr, D. Jiang, M. Torrent Moreno, L. Delgrossi, H. Hartenstein Links:
Quelle: In Proceedings of the 10th ACM/IEEE International Symposium on Modeling, Analysis, and Simulation of Wireless and Mobile Systems (MSWiM), pp. 159-168, Chania, Greece, October 2007
NS-2, with its IEEE 802.11 support, is a widely utilized simulation tool for wireless communications researchers. However, the current NS-2 distribution code has some significant shortcomings in the architecture and modeling correctness of the IEEE 802.11 MAC and PHY modules. This paper presents a completely revised architecture and design for these two modules. The PHY is now a full featured generic module able to support any single channel frame-based communications (i.e. it is also able to support non-IEEE 802.11 based MAC). The key features include cumulative SINR computation, preamble and PLCP header processing and capture, and frame body capture. The MAC accurately models the IEEE 802.11 CSMA/CA mechanism (without upper MAC management features like beacons, association, etc.), as required for credible simulation studies. The newly designed MAC models transmission and reception coordination, backoff management and channel state monitoring in a structured and modular manner. In turn, the contributions of this paper make extending the MAC for protocol researches much easier and provide for a significantly higher level of simulation accuracy.

Corresponding code and patches can be found here.