CAJ | 학술논문

针对基于无线传感器网络构建的温室环境控制系统,为了减少无线网络固有的时变传输延时、丢包、网络拥塞等现象对控制性能的影响,该文从提高网络服务质量(quality of service,QoS)的角度出发,提出一种基于Takagi-Sugeno 模糊控制器的QoS管理策略.该QoS管理策略以截止期错失率作为QoS性能评价指标,针对传感器节点和执行器节点之间的数据传输,通过动态调整传感器节点的采样周期,使截止期错失率维持在设定水平,从而提高网络QoS.初步试验表明了该QoS管理策略的合理性、有效性和实用性.该QoS管理策略可以广泛应用于温室、农田、苗圃等区域.该研究为提高无线传感器网络在设施农业中的应用水平做出了有益探索.
침대기우무선전감기망락구건적온실배경공제계통,위료감소무선망락고유적시변전수연시、주포、망락옹새등현상대공제성능적영향,해문종제고망락복무질량(quality of service,QoS)적각도출발,제출일충기우Takagi-Sugeno 모호공제기적QoS관리책략.해QoS관리책략이절지기착실솔작위QoS성능평개지표,침대전감기절점화집행기절점지간적수거전수,통과동태조정전감기절점적채양주기,사절지기착실솔유지재설정수평,종이제고망락QoS.초보시험표명료해QoS관리책략적합이성、유효성화실용성.해QoS관리책략가이엄범응용우온실、농전、묘포등구역.해연구위제고무선전감기망락재설시농업중적응용수평주출료유익탐색.
In order to reduce the impact of inherent network time-varying delay, packet loss, network congestion and other phenomena on control performance of the greenhouse environmental control system based on wireless sensor networks, the QoS management strategy based on Takagi-Sugeno fuzzy logic controller were proposed from the perspective of improving quality of service (QoS). The basic idea of the proposed QoS management strategy is to use deadline miss ratio as the evaluating index of the QoS and to adapt the sampling period of each sensor nodes by means of feedback control technology at run time so that the deadline miss ratio associated with the real-time data transmission from the sensor nodes to the actuator nodes is maintained at a pre-determined desired level and the required QoS can be achieved. Preliminary experimentations indicate the rationality,effectiveness and practicability of the proposed QoS management strategy. It can be effectively applied to the greenhouse, the field cropland, and the nursery garden, etc. This research contributes to the exploration on how to improve the application level of wireless sensor networks in facility agriculture.