Abstract :
Energy efficiency has become one of the most important issues in wireless body area network (WBAN). In this paper, an energy-efficient medium access control (MAC) protocol for WBAN is proposed based on human body posture under walking scenery. Due to person´s movements, WBAN is a dynamic network, which means that traditional static protocols are no more suitable for it. For solving this problem, firstly, the feature of human walking at a constant speed is analyzed and we divide a spell of movements into a sequence of key frames just like a video constituted by numbers of continuous frames. As a result, the dynamic walking process is translated into several static postures, which the static MAC protocol could be used for. Secondly, concerning the performance of network lifetime, we design a posture-aware approach for lifetime maximization (PA-DPLM). With analytical and simulation results provided, we demonstrate that PA-DPLM protocol is energy-efficient and can be used under constant speed walking scenery.
Keywords :
access protocols; body area networks; energy conservation; gait analysis; optimisation; MAC protocol; PA-DPLM protocol; WBAN; dynamic walking process; energy-efficient medium access control protocol; human body posture; posture-aware approach for lifetime maximization; wireless body area network; Body area networks; Energy efficiency; Legged locomotion; Protocols; Wireless communication; Wireless sensor networks; Wrist; energy efficiency; medium access control (MAC); walking scenery; wireless body area network (WBAN);
