Models of 802.11 Multi-Hop Networks: Theoretical Insights and Experimental Validation
The authors have presented two models of wireless multihop networks. They are in general simpler than most models proposed so far. When confronting them with realistic simulations or experiments, they find that they still capture the essential performance properties found in the real protocol. It is worth noting that in both cases the imperfections of the real protocol (collisions, stealing effect) help one to mitigate starvation or instability. The explanation follows from the models described in the paper. The loss network model is well suited to study the performance of saturated networks. It explains in particular why CSMA/CA networks achieve a very high spatial reuse, but also suffers from an intrinsic unfairness at the link level already.