In this paper, it is suggested a cooperative protocol based on two controller nodes. In the proposed protocol, the outer body master node as well as the belt master one are used for the avoiding the retransmitting operation via more than one sensor that increase the probability of the colliding, a master node works cooperatively to reduce BER, Power consumption in term of Duty cycle. We present an arithmetical model of the cycle of duty accompanied by the WBAN suggested protocol.
