Throughput and energy consumption analysis of

We propose a new analytic model of the IEEE 802.15.4 slotted CSMA/CA from which throughput and energy consumption are computed in saturation conditions. The analytic results are validated via ns-2 simulations. Introduction: IEEE 802.15.4 is designed for low data-rate and small-size wireless personal area networks (WPANs) [1]. This letter focuses on the star topology of 802.15.4 expected to be a dominant type at least in the foreseeable future. In the topology, each device uses a slotted carrier sense multiple access (CSMA/CA). In view of using binary exponential backoff, th