Extensive simulations are conducted for analysis and validation of the proposed mechanism. Analytical expressions are derived to model and analyze the behavior of average energy consumption, throughput, packet drop probability, and average delay during normal and emergency data. Furthermore, a discrete time finite state Markov model to find the node states is used. In order to save energy, a wake-up radio based mechanism to control sleep and active modes of body sensors are used. Moreover, priority guaranteed CSMA/CA mechanism is used where different priorities are assigned to body nodes by adjusting the data type and size. In this paper, the modified superframe structure of IEEE 802.15.4 based MAC protocol is proposed which addresses the aforementioned problems and improves the energy consumption efficiency. Moreover, most of these applications have stringent QoS requirements such as delay and throughput. ![]() However, network lifetime is one of the most prominent barriers in deploying these networks for most applications. Wireless body area networks are captivating growing interest because of their suitability for wide range of applications.
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