无线体征监测系统的低功耗调度方法

摘要

Based on Ultra-WideBand ( UWB) Body Area Network ( BAN) and heterogeneous biosensors, a kind ol wireless physiological monitoring system was designed, which could acquire and process multiple physiological signals. For reducing the total energy consumption, a low-power scheduling scheme was further proposed so as to provide long-term continuous sensing for wearer's health and safety. According to the physiological state machine of the monitoring system, a coordinator could adaptively determine the biosensor set for next monitoring cycle, and those selected biosensors can cooperatively process the heterogeneous data. The simulation results show that with the same monitoring conditions, the proposed scheme can effectively reduce the biosensor's invalid operation and wireless data transmission, and thus extend the operational lifetime of the BAN-based monitoring system.%基于超宽带(UWB)体域网和异构的生理传感器,设计了可对多种生理信息进行实时采集与处理的无线体征监测系统,并针对此类系统提出了基于体征状态机的低功耗调度方法,以便长期监测人体的健康与安全.在该调度方法中,协调器根据系统的体征状态机自适应地确定下一监测周期的传感器集合,并控制相应的生理传感器进行协同工作.仿真结果表明在同样的监测情况下,建议的调度方法有效减少了多生理传感器的不必要运行和无线传输的数据量,从而延长了整个监测系统的工作寿命.