Since there are no implementation methods in SIP standards (RFC3261), a finite state machine of client's transaction and its dataflow diagram are designed with rollback pointers algorithm.
因为SIP协议标准本身（RFC3261）并没有给出实现方法，本文通过采用指数后退算法设计SIP客户事务的有限状态机及其流程图。
Based on the analysis of dataflow state machine, the authors design and implement a dataflow analyzer to parse more useful information from their simulation work.
在具体分析了仿真中数据流的解析过程的基础上，文章提出了分析仿真结果的新途径，并设计和实现了数据流分析器。
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