多媒体电力调度指挥应急系统的设计与实现

发布时间：2019-03-20 16:33

【摘要】：“三网融合”是当下科技和标准逐渐融合的一个典型表现形式,以软交换为核心的NGN已成为未来网络发展的大趋势,电力系统通信也将受益于这一技术。本文通过对电力通信中的语音视频的研究,提出了一套基于开源解决方案的软交换系统和通信工具软件的集成运用方案,并对实际的业务进行了设计与实现。文章首先对通信系统中的几类关键技术进行了阐述。采用流行的SIP协议作为系统的信令协议。同时介绍了当前流行的WebRTC标准,音视频编码技术和媒体流传输技术。在此基础上,给出了本文电力系统指挥与调度系统中的多媒体通信平台的设计方案,并选择强大的FreeSwitch开源软件作为该多媒体通信平台的软交换软件支撑平台。通过分析FreeSwitch内核结构特点、对应SIP信令的处理和实现过程、呼叫控制流程、功能扩展呈现等,结合电力公司的实际应用,实现了针对FreeSwitch WEB GUI管理界面的二次开发;针对电力公司大量的原有WEB应用,在传统的网页界面中,通过嵌入网页电话功能,增强其它的功能,实现浏览器和普通SIP软电话、智能终端、公用电话之间的即时通讯功能。点击呼叫功能也可方便地内嵌到已有WEB页面,方便和加强了电力公司人员之间的实时联络。本系统的实现遵循了网络接入、呼叫控制、电力生产业务应用的三层体系结构,满足集团化应用需求、全局指挥的应用理念,同时具备移动化的应用能力和智能化的趋势。可方便进行新业务的扩展应用。另外,根据电力公司的实际业务需求,充分地进行了验证本研究系统的可行性、实用性测试。此通信平台的成功实现,能够为电力系统的指挥与调度和多媒体视频会议系统提供了有力保障和支撑,并有利于拓展更多的应用业务,促进电力公司的健康、快速发展。
[Abstract]:The integration of "three networks" is a typical manifestation of the gradual integration of science and technology and standards. NGN with softswitch as the core has become a major trend of network development in the future, and power system communication will also benefit from this technology. Based on the research of voice and video in electric power communication, this paper presents an integrated application scheme of soft switch system and communication tool software based on open source solution, and designs and implements the actual business. At first, several key technologies in communication system are described. The popular SIP protocol is used as the signaling protocol of the system. At the same time, the current popular WebRTC standard, audio and video coding technology and media streaming technology are introduced. On this basis, the design scheme of multimedia communication platform in the command and dispatch system of power system is given, and the powerful open source FreeSwitch software is chosen as the soft switch software support platform of this multimedia communication platform. By analyzing the characteristics of FreeSwitch kernel structure, corresponding to the processing and implementation of SIP signaling, call control flow, function extension presentation and so on, combined with the practical application of power company, the secondary development of FreeSwitch WEB GUI management interface is realized. In view of a large number of original WEB applications in electric power companies, the instant communication between browser and ordinary SIP soft phone, intelligent terminal and public telephone is realized by embedding the function of web phone and enhancing other functions in the traditional web interface. The click-to-call function can also be embedded in the existing WEB pages, facilitating and enhancing real-time communication between the power company personnel. The implementation of the system follows the three-layer architecture of network access, call control, electric power production business application, satisfies the application requirements of collectivization, global command, and has the mobile application ability and the trend of intelligentization at the same time. It is convenient to expand the application of new services. In addition, according to the actual business requirements of the power company, the feasibility and practicability of the research system are fully tested. The successful realization of this communication platform can provide powerful support for the command and dispatch of electric power system and multimedia video conference system, and is beneficial to expand more application services and promote the healthy and rapid development of power companies.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM73;TP311.52

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