基于SIP的铁路云视频会议系统优化方案研究  

Research on Optimization Scheme of Railway Cloud Video Conferencing System Based on SIP

作　　者：王少石 张树艳 胡福强 周泠泽 柴金川 WANG Shaoshi;ZHANG Shuyan;HU Fuqiang;ZHOU Lingze;CHAI Jinchuan

机构地区：[1]中国铁路信息科技集团有限公司信息调度中心,北京100038 [2]中国铁路信息科技集团有限公司网信技术处,北京100038 [3]中国铁道科学研究院集团有限公司国家铁道试验中心,北京100015

出　　处：《铁道通信信号》2024年第9期63-72,共10页Railway Signalling & Communication

基　　金：中国国家铁路集团有限公司科技研究开发计划重点课题(N2022S013)。

摘　　要：针对当前铁路云视频会议系统内外网音视频信息传输性能存在不足、国铁集团各级单位常态化应用模式下视频会议需求持续增加等问题,结合系统使用特点,采用比H.323协议更具优势的会话初始协议(SIP)优化音视频信息传输技术,通过搭建最小功能单元测试系统对各项功能进行测试,验证了系统会议功能得以丰富和完善,传输时延等关键性能得以提升。同时,对比分析集中式、二级平台(同构/异构)、分布式和背靠背等部署模式的优缺点,提出基于SIP的系统总体架构部署方案,为未来系统实现扩容升级提供有利的技术支撑。In response to the insufficient performance of audio and video information transmission between internal and external networks of the current railway cloud video conferencing system,as well as the increasing demand for video conferencing in the normal application mode of various organizations of CHINA RAILWAY,combining with the application characteristics of the system,this paper adopts Session Initialization Protocol(SIP),which is more advantageous than the H.323 protocol to optimize audio and video information transmission technology,tests and verifies various functions by constructing a minimum functional unit test system and realizes the enrichment and improvement of system functions and the improvement of key performance such as transmission delay.Meanwhile,this paper compares and analyzes advantages and disadvantages of centralized,secondary platform(homogeneous/heterogeneous),distributed,and back-to-back deployment modes,and puts forward an overall system architecture deployment scheme based on SIP.The scheme provides strong technical support for the future system expansion and upgrading.

关 键 词：云视频会议系统 H.323协议 会话初始协议 总体架构 部署方案 

分 类 号：U285.3[交通运输工程—交通信息工程及控制]