Geometrical modeling of shadowing between on-body nodes and off-body antennas during various human movements in WBAN

Propagation channel of body area networks fluctuates by shadowing caused by human movement. However, to make dynamic BAN channel model for individual human motion by few parameters is not easy, so most of the channel modeling in BANs are performed with statistical treatment of human motions. In this paper, as an attempt to treat individual human motions in BAN channel modeling, a geometrical modeling method of shadowing during human movement is proposed. Shadowing between on-body nodes and an external access point during several human movements (walking, running, and weak-walking) is calculated by numerical simulations, and shadowing rates are modeled by proposed method. As a result, fittings of shadowing by proposed function are obtained with six parameters for individual human movements.