【摘要】 文章介绍了一种基于轮询的网络介质访问方法,以解决在工业等实时系统中工作站含有两类数据帧的传输问题,即实时帧与非实时帧,其中实时帧可以被保证具有确定的等待时间上界。工作站用混合服务策略传输两类帧,即用穷尽式服务策略传输实时帧,用k-有限式服务策略传输非实时帧。文章研究了服务参数对于网络性能的影响,同时推导了实时帧等待时间上界的表达式,并经过了仿真试验的验证。更多还原

【Abstract】 This paper introduces a real time polling based media access method to deal with two frame classes,real time and unreal time class,of which the waiting time of real time frame has determinable upper bound.The station transmits these two classes of frame with mixed service discipline;one class is with exhaustive service discipline,and the other with k-limited service discipline.We study the influence of the service parameters on the performance of network model.The analytical upper bounds of waiting time for the real time classes are obtained and justified by the simulation results.更多还原