【摘要】 <正> 1 前言开放系统技术在信息技术领域已经得到了广泛应用。应用开放系统技术可以方便地开发、集成、升级和维护各种应用系统,大大降低了构建应用系统的代价,并极大地提高了生产效率。尽管开放系统不存在精确的定义,但对开放系统却存在着公认的“必具特征”,也即它们是:具有可移植性;具有可互操作性;具有可更多还原

【Abstract】 With the wide spread application of open system technology and the new trend of transition from proprietary real-time system to open real-time system,the demand for careful study on real time problems for open system is emerging. In terms of the features of real-time system and the characteristics of open system environment,it is deduced that open real-time system contains two aspects:communication real time and end-system real time,and is suggested to use real-time domain concept to divide system into smaller subsystems. Real-time QoS is introduced to express various real-time requirements. Design and implementation of the open system real time are discussed.更多还原