面向医护监测的无线体域网MAC层协议策略研究

摘要

针对医疗护理领域的业务需求和监护设备节点存在多样性的特点,在IEEE802.15.4协议基础上,讨论一种无线体域网混合MAC层协议策略.通过使用长超帧结构消除多余信标帧结构以提高时隙的利用率;通过短中断机制发送随机数据保证了数据的实时性;在竞争访问阶段使用短中断机制,提高能量利用率,延长网络的生存时间.仿真实验结果证明,混合MAC协议提高了医护监测应用中的网络效率.%Considering the service requirement and monitoring equipment node diversity characteristics in the field of medical care,a hybrid MAC layer protocol for wireless body area network is discussed based on the IEEE802.15.4 protocol.A superframe structure with longer length is used to eliminate the redundant beacon frame structure to improve the utilization of time slot;random data is sent through short interrupt mechanism to ensure the real-time data;short interrupt mechanism is used in the contention access stage to improve energy utilization and extend network survival time.The result of simulation shows that the hybrid MAC protocol improves the network efficiency significantly in healthcare monitoring applications.