基于复制技术的Parlay CC SCS容错算法

Parlay CC SCS Fault-Tolerance Algorithm Based on Replication Techniques

提供呼叫控制业务能力的Parlay CC SCS要支撑业务运营商开发的增值业务,则需要提供电信运营级的可靠性和容错能力。提出了一个基于复制技术的容错处理算法,采用复制技术在服务器集合的各结点上共享Parlay CC SCS呼叫控制事务状态。容错处理算法包括本地读处理算法、远地读处理算法、本地写处理算法、远地写处理算法和复制处理算法等。通过性能分析得出:容错处理算法出现错读概率与远地读到达速率和通信时间量相关。

In order to support value-added services developed by service providers based on Parlay CC SCS that supplies call control service function, carrier grade reliability and fault-tolerance capability must be supplied. This paper presents replication-based fault-tolerance algorithm. CCTS （Call Control Transaction States） are shared in each site of Parlay CC SCS set by using replication techniques. The fault-tolerance algorithm comprises local-read processing algorithm, remote-read processing algorithm, local-write processing algorithm, remote-write processing algorithm, and copy processing algorithm. The result shows that misread probability is very low with the fault-tolerance algorithm.