基于WiFi的数字集群调度终端视频传输的研究与实现

发布时间：2018-01-30 08:17

本文关键词： 数字集群系统调度终端视频传输　出处：《北京交通大学》2017年硕士论文　论文类型：学位论文

【摘要】：基于WiFi的数字集群系统是一种宽带数字集群系统,主要用于酒店、宾馆以及物业等单位的指挥调度,在国内具有巨大的市场。通过调度终端,调度员不但可以与无线用户进行语音和数据通信,而且可以对集群系统资源进行管理。在调度终端加入视频业务,可以增强人们对事态的感知度和信息共享能力,实现更高效的指挥调度。因此,基于WiFi的数字集群调度终端的视频传输具有重要的实用价值。本文在综述国内外调度终端视频传输发展现状的基础上,首先分析了基于WiFi的数字集群系统整体框架、调度系统的组成、调度终端的功能以及终端的视频传输,详细地描述了调度终端登录、注销以及视频传输的信令处理流程;然后,设计了调度终端与调度台服务器的接口以及调度终端与媒体网关服务器的接口,定义了调度终端登录、注销以及视频传输的信令,阐述了视频传输中接收、解密、解码、格式转换以及播放模块的关键技术,并给出了调度终端视频传输功能的主流程、初始化模块、调度终端与服务器交互模块、视频传输模块的处理流程;其次,基于Windows操作系统,利用C++语言在Microsoft Visual Studio 2012开发环境中,开发了调度终端视频传输功能的主程序、初始化模块、调度终端与服务器交互模块、视频传输模块,实现了调度终端与移动终端之间的视频传输功能;最后,对调度终端的登录和注销、调度终端作为主呼的视频通话以及调度终端作为被呼的视频通话进行了测试,测试结果满足基于WiFi的数字集群调度终端视频传输的设计需求。
[Abstract]:Digital trunking system based on WiFi is a wideband digital trunking system, which is mainly used for the command and scheduling of hotels, guesthouses and other units. It has a huge market in China. Dispatchers can not only communicate voice and data with wireless users, but also manage the resources of cluster system. Can enhance people's awareness of events and the ability to share information to achieve more efficient command and scheduling. The video transmission of digital cluster scheduling terminal based on WiFi has important practical value. This paper summarizes the current situation of video transmission at home and abroad. Firstly, the whole framework of digital trunking system based on WiFi, the composition of scheduling system, the function of scheduling terminal and the video transmission of terminal are analyzed, and the login of scheduling terminal is described in detail. The signalling process of logout and video transmission; Then, the interface between the scheduling terminal and the scheduler server and the interface between the scheduling terminal and the media gateway server are designed, and the signalling of the scheduling terminal login, cancellation and video transmission is defined. In this paper, the key technologies of receiving, decrypting, decoding, format conversion and playing module in video transmission are described, and the main flow chart and initialization module of video transmission function of dispatching terminal are given. Scheduling terminal and server interaction module, video transmission module processing process; Secondly, based on the Windows operating system, C language is used in the Microsoft Visual Studio 2012 development environment. The main program, initialization module, interactive module between scheduling terminal and server, video transmission module are developed, and the video transmission function between scheduling terminal and mobile terminal is realized. Finally, the login and logout of the scheduling terminal, the video call of the scheduling terminal as the primary call and the scheduling terminal as the called video call are tested. The test results meet the design requirements of digital cluster scheduling terminal video transmission based on WiFi.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN919.8;TN92

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