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针对现有文献侧重单一网关功能实现的问题,研究多媒体网关共性和底层通信模式.以应急调度系统业务流程为例,分析了网关数据通信的多任务并发处理流程,设计了一套适合多媒体网关软件开发的通信模式.该模式将多任务分配到线程池的空闲线程队列并发执行,以插件形式封装外部设备,在异构网络环境中实现了媒体设备之间的异步通信.通过会议调度实例指出了IP语音质量优化的可行方案,实验结果表明,以该模式研发的语音网关能很好满足应急调度功能要求,实时响应性能良好.
In view of the existing literature focuses on the realization of a single gateway function, the study of the commonness of multimedia gateways and the underlying communication mode.An emergency dispatch system business process as an example, analyzes the gateway data communication multitasking concurrent processing flow, designs a suitable multimedia gateway software Developed a communication mode.This mode will be multitasking assigned to the thread pool idle thread queue concurrent execution, plug-in package external devices, in heterogeneous network environment to achieve asynchronous communication between media devices.Through the meeting scheduling example pointed out IP voice quality optimization feasible scheme, the experimental results show that the voice gateway developed in this mode can well meet the emergency dispatch function requirements, real-time response performance is good.