摘要： 在航天测量与控制系统中，访问实时数据库的实时事务对时间限制的要求是不一致的，该文在分析了这些事务特征的基础上，提出了混合实时数据库系统的概念，并设计了相应的优先级分派算法——事务的紧迫度和终止时间优先和并发控制协议——扩展的有条件优先级继承。

关键词: 混合实时数据库系统, 优先级分配, 并发控制

Abstract: In the spaceflight measurement and control systems, the real-time transactions accessing real-time database systems (RTDBS) have different request for timing constraints. In this paper, the authors establish a RTDBS model: mixed real-time database systems (MRTDBS), and design a priority-based scheduling algorithm CDF and a concurrency control protocol ECPI.

中图分类号: 

• TP311.13