QoS Performance Analysis for Slotted CSMA/CA in IEEE802.15.4

Aiming at researching the QoS performance of slotted CSMA/CA mechanism in beacon-enabled IEEE802.15.4, this paper analyzes the effect relationship between QoS and superframe parameters through analytic mathematical model and simulation method. Firstly, the nodes’ sleeping time of WSNs is deduced from duty cycle mathematical formulation. Therefore, the energy consumption directly related to sleeping time can be evaluated. In order to analyze and evaluate the effect relationship between QoS and superframe parameters more accurate and more comprehensively, all kinds of simulation instances with different superframe parameters, including different duty cycles as well as same duty cycle but with different values of Beacon Order (BO) and SuperFrame Order (SO) are simulated. The results show that the mathematical model analysis of QoS performance is consistent with the simulation. The studies also provide a reference to further research of adaptive transmission mechanism in beacon-enabled IEEE802.15.4.