县乡防汛远程会商系统方案设计

论文字数:18851,页数:41

摘要

 视频会议系统(Video Conferencing System)是通过网络通信技术来实现的虚拟会议，使在地理上分散的用户可以共聚一处，通过图形、声音等多种方式交流信息，支持远距离进行实时信息交流与共享、开展协同工作的应用系统。视频会议极大的方便了协作成员之间真实、直观的交流，对于远程教学、远程医疗等应用也有着举足轻重的作用。目前，整个视频会议市场规模随着用户群的不断增加而日益扩大。
 随着网络通信和流媒体技术的发展及相关国标协议标准的成熟，视频会议系统已从高价位专用市场向低价位普通用户市场转移，从硬件视频会议转向软件视频会议，从基于N-ISDN或PSTN的视频会议系统向基于分组交换网的IP视频会议系统过渡。相对于传统的会议模式来说，基于IP的软件视频会议系统以低廉的成本快捷优质的服务成为目前研究和开发的热点之一，这也是视频会议系统的主要发展趋势。
 本文主要介绍了视频会议的定义、分类、组成及设计原则。截止2005年县一级的防汛远程会商系统已经基本上建成，并实现与省（浙江省）、市的系统连接。本文主要针对从县到乡这级的远程会商系统进行设计，以舟山市岱山县为例子进行阐述。主要包括系统的结构设计，网络设计，系统的设备选型以及会议室建设。

关键词：视频会议，视频会议系统，远程会商，防汛

ABSTRACT
 The paper mainly introduces the Video Conferencing System’s (VCS) definition, classification, composition and principle of design. Up to 1995, the county- level Distance Consulting System (DCS) for flood prevention has been basically completed and has achieved system connections with province (Zhejiang Province) and cities. And this essay aims at DCS from county to village expatiated with an example of Daishan County of Zhoushan Province, including the structural design, network design ,equipment selection of the system and the construction of assembly rooms.
 The VCS is an application system, used to support long-distance communication of real-time information among people and develop coordinate work. The virtual conference which depends on network communication technologies make dispersed consumers gather together, exchange and share information through various ways, such as images and sound. The development of the application system has built its contribution to cause great convenience on making the communications between customers more veritable and visual. Meanwhile, applications on distance learning and long-range medical treatment also have pivotal functions. At present, the market scale of VCS is expanding day by day along with the unceasing growth of user groups.
 With the development of network service technologies and multimedia technologies as well as the mature standard of international agreement, the VCS has been transformed from the higher-priced special market to market for common family use; from hardware video conference system to software system; from the system based on N-ISDN or PSTN to the IP video conference system which is on the base of grouping switched network. Compared with the traditional conference pattern, the IP video conference system has advantages of inexpensive cost and high qualified service. Therefore, this system turns into a main developing tendency and one of focal researching and developing issues currently.
 
 Keywords: video conference, video conference system, long-distance consulting system, flood prevention..
目录
摘要 I
ABSTRACT II
第1章 引言 2
1.1 背景 2
1.2 研究内容 4
第2章 视频会议系统 6
2.1 视频会议系统的定义 6
2.2 视频会议系统分类 6
2.3 视频会议系统的组成 6
2.3.1 视频会议终端 7
2.3.2 多点控制单元MCU 8
2.3.3 传输网络 8
2.3.4 附属设备 8
2.4 视频会议系统的实现方式 9
2.5 视频会议的设计原则 9
2.5.1 适用性原则 9
2.5.2 可管理性原则 10
2.5.3 可靠性原则 10
2.5.4 层次化原则 10
2.5.5 标准化原则 10
2.5.6 可扩展性原则 10
第3章 岱山县防汛远程会商系统构建 11
3.1 项目概况 11
3.2 项目目标 11
3.2.1 覆盖目标 11
3.2.2 功能目标 12
3.3 子系统划分 12
3.3.1 综合布线系统 12
3.3.2 本地会议子系统 13
3.3.3 远程会商子系统 13
3.4 系统设计 13
3.4.1 设计原则 13
3.4.2 结构设计 13
3.4.3 网络设计 16
第4章 设备选型 19
4.1设备选型及项目概算 19
4.2 DST H.323 MCS 4000 MCU 20
4.2.1 主要功能 20
4.2.2 技术指标 23
4.3 VCON HD1000视频终端 25
4.3.1 主要功能 25
4.3.2 技术指标 25
4.4 SONY D70摄像机 27
第5章 会议室建设 29
5.1 会议室原则 29
5.2 会场网络接入 30
5.2.1准备内容 30
5.3 分会场会议室 30
5.3.1 分会场准备 30
5.3.2 计划布局 31
第6章 结束语 35
致谢 36
参考文献 37