On the study of interference mitigation and QoS protocol for wireless body area networks using real-time scheduling

In a wireless body area networks (WBAN) with integrated sensor hubs, the proposed MAC protocol is a TDMA-based schedule used in active superframe interleaving and beacon shifting defined by the IEEE 802.15.6 standard. It considers the human dynamics and traffic information to meet the different QoS requirements of each sensor, improve bandwidth utilization and reduces packet collisions within networks. We apply a quality-of-service (QoS) resource allocation method to share limited bandwidth among multiple WBANs. In the proposed scheduling, the required service rate and maximum packet inter-arrival time for each WBAN are parameterized. The inter-arrival times of WBAN packets regarded as periodic tasks are then transformed to avoid scheduling jitters, thus increasing predictability and reducing packet collisions.