分布实时系统通信与管理研究

On Communication and Management of DRTS

针对航空航天电子综合系统等一类命令控制型分布实时系统,作者认为已有的通用管理和调度策略缺乏高效性.本文在分析该类系统特征基础之上,提出了与之相适应的层次通信机制,事件驱动策略与分布服务方式,并实现了一个分布式实时操作系统.初步应用表明所采用的技术是有效的.

In order to satisfy China's need for Distributed Real-Time Systems (DRTS), the authors study the communication and management of such systems. The technical measures proposed by the authors are found to be effective in simulation tests; moreover, these measures are now adopted for design of some Intergrated Avionics System needed by China's aerospace industry. The proposed technical measures are now briefly stated. As regards Communications, there are two measures: the distributed real-time communication mechanism is rationally divided into five logical levels; the Priority-Polling bus control mode is used. As regards schedule, two measures are adopted: global schedule according to the system working mode and local schedule driven by real-time events; the two types of schedule are well coordinated. As regards mangement, there are three technical measures adopted; broadcasting time syncronization, half-dynamic communicaiton port mechanism, and coherenct distributed data management.