本课程主要介绍通信领域中的典型及新型交换技术。具体包括：1）第一章概述交换式通信网络所涉及的各核心技术环节、交换技术分类等相关基础知识；2）鉴于交换网络是交换式通信网的核心组成技术之一，第二章主要在介绍时分复用等相关信号复用方式及T交换单元等一些典型交换单元的基础上，重点讲解T-S组合型、CLOS网、BENES网、CANTOR网、BABYAN网、排序网、集中器等各种典型的交换网络并对其特点和性能加以分析；3）鉴于信令也是交换式通信网络的核心组成技术之一，第三章主要介绍信令定义/信令方式/信令编码等信令系统的相关基础知识，并在此基础上，重点讲解目前应用广泛的7号信令系统，包括7号信令消息格式、信令分层结构、各层功能及工作原理等内容；4）第四章讲解两种出现较早的典型交换技术，即，电路交换和数字程控交换，并重点介绍数字程控交换原理及系统的软硬件组成、处理机机制、典型的呼叫处理软件等内容；5）第五章介绍移动交换技术，首先介绍相关的PLMN基本知识，并在此基础上，着重讲解移动交换原理、移动呼叫一般过程/漫游/切换等移动交换基本技术、无线接口信令/基站接入信令/网络接口信令等移动交换信令等内容；6）第六章首先介绍分组交换相关内容，包括分组交换原理及协议/路由/流量控制等三大关键技术，并鉴于分组交换的局限性，进一步介绍帧中继技术，详细讲解帧中继的原理、特点以及帧中继协议等内容；7）第七章介绍典型的ATM交换技术，主要讲解ATM信元结构和分层协议参考模型、ATM交换结构、ATM交换原理、ATM流量控制和拥塞控制机制、ATM信令等内容；8）第八章介绍多层交换技术，讲解二层交换、三层交换(IP交换)、四层交换及七层交换的基本原理，其中，三层交换技术是讲解重点，且围绕三层交换问题，也介绍多种目前具有代表性的三层交换解决方案；9）第九章介绍新型的光交换技术，主要讲解一些典型的光交换元器件、光交换原理、光交换技术分类、空分光交换/时分光交换/码分光交换/波分光交换/自由空间光交换等代表性的光路光交换技术、光分组交换/ATM光交换/光突发交换/多粒度光交换等代表性的分组光交换技术等内容；10）第十章介绍新型的软交换技术，首先介绍下一代网络NGN的定义/特点/体系结构等相关基础知识，在此基础上，重点介绍软交换的定义/特点、软交换的体系结构及功能组成、软交换的原理、MGC/MG等软交换网络中的重要组成部件功能及工作原理、H.248/MGCP/H.323/SIP等代表性的软交换协议等内容。围绕上述授课内容，注重在教学上充分体现基础性、综合性、先进性，即，除了向学生讲授现代交换领域的基础知识外，还向学生展示该领域的最新技术发展现状及趋势，以体现课程内容的时代性和前沿性。

This course mainly introduces the typical and new switching technologies in the field of telecommunications. It includes ten chapters: 1) Chapter one, it introduces the related basic knowledge such as the key technologies of the telecommunication networks, classification of the switching technologies, etc; 2) Chapter two, it firstly introduces the corresponding knowledge about signal multiplexing, switching element, etc, and based on the above, mainly introduces some typical switching networks such as T-S network, CLOS network, BENES network, CANTOR network, BABYAN network, etc; 3) Chapter three, it introduces the related knowledge about signaling system, emphasizing on No. 7 signaling system; 4) Chapter four, it introduces the related knowledge about two kinds of earlier typical switching technologies --- circuit switching and digital stored program control switching, emphasizing on the introduction about the working mechanism, software and hardware composing, call processing software of the digital stored program control switching; 5) Chapter five, it introduces the related knowledge about the mobile switching, including the basic knowledge of PLMN, the working mechanism of mobile switching, the basic technologies such as general process of mobile call and handover, the mobile signaling, etc; 6）Chapter six, it introduces the related knowledge about packet switching and frame relay, including their working mechanism, characteristic, protocol, routing and flow control, etc; 7）Chapter seven, it introduces the related knowledge about ATM switching, including ATM cell structure, ATM layered protocol structure, ATM switching networks, ATM working mechanism, ATM flow control and congestion control, etc; 8）Chapter eight, it introduces the related knowledge about multiple-layered switching, including the second layered switching, the third layered switching, the fourth layered switching and the seventh layered switching, and emphasizing on the introduction of the working mechanism of the third layered switching and some corresponding typical solutions, etc; 9）Chapter nine, it introduces the related knowledge about optical switching, including some typical optical switching elements, the working mechanism of optical switching, the classification of optical switching, some typical optical switching technologies such as space-division optical switching, time-division optical switching, code-division optical switching, wave-division optical switching, optical packet switching, ATM optical switching, etc; 10）Chapter ten, it introduces the related knowledge about soft switching, including the related basic knowledge of NGN, the definition, characteristics, functions of soft switching, the working mechanism of soft switching, the important soft switching network elements such as MGC and MG, the typical protocols such as H.248/MGCP/H.323/SIP, etc. As a whole, this course introduces not only the fundamental and general knowledge about the switching technologies but also the corresponding advanced technologies and trends.