Subjects: Computer Science >> Integration Theory of Computer Science submitted time 2018-11-29 Cooperative journals: 《计算机应用研究》
Abstract: Aiming at the problem of low adaptability and low energy efficiency of MAC protocol of the wireless body area network, this paper proposes an adaptive MAC protocol based on IEEE 802.15.6 for wireless body area networks (A-MAC) . The protocol improves the superframe structure of IEEE 802.15.6, and the lengths of the contention phase and the non-contention access phase are adjusted according to the proportion of nodes generating each priority data. The contention access phase is further divided into three sub-phases, and the length of the sub-phase is dynamically adjusted according to the data priority. All nodes compete for access channels in accordance with the channel access policy during the contention access phase. Finally, the simulation results show that the network performance using A-MAC protocol is significantly better than the network performance using IEEE 802.15.6 MAC protocol and CA-MAC protocol in terms of throughput, power consumption and network delay.