支持移动多媒体通信中间件的存储转发引擎的设计

Design of Storage-transmit Engine of Middleware of Supporting Mobile Multimedia Communications

存储转发引擎是支持移动多媒体通信中间件的数据传输系统的运转中枢。本文详细讨论了存储转发引擎的设计模式和策略选择，提出了一个基于Windows2000／NT操作系统的设计模型。引擎设计采用线程池与完成端口重叠I/O相结合，选择结构化的消息队列和基于优先权的队列调度机制，由管理线程池、接收线程池、分析线程池和发送线程池组成，其中详细介绍了接收线程池、发送线程池和分析线程池的工作流程。

The storage-transmit engine is the running backbone of data traffic system of middleware of supporting mobile multimedia communications. The design and strategy choice of storage-transmit engine are discussed in details in this paper, and a design model based on Windows2000/NT operation system is put forward. The engine design adopts thread pool integrated with CompletionPort overlapped I/O, selects configurable message queues and queue scheduler based on priority. It consists of manager thread pool, receiving thread pool, sending thread pool and analyzing thread pool, and then the work flows of receiving thread pool, sending thread pool and analyzer thread pool are introduced in details.