Affiliations: Department of Computer Science, University of
Wisconsin Milwaukee, Milwaukee WI 53201, USA. E-mail: {mukul,wxie,hosseini}@uwm.edu
Abstract: IEEE 802.15.4 is a popular choice for MAC/PHY protocols in low power
and low data rate wireless sensor networks. In this paper, we suggest several
modifications to beaconless IEEE 802.15.4 MAC operation and evaluate their
impact on the performance via stochastic modeling and simulations. We found
that the utility of these modifications is strongly dependent on the traffic
load on the network. Accordingly, we make recommendations regarding how these
modifications should be used in view of the prevalent traffic load on the network.