In chapter four , analyze some network transferring technologies about tcp / ip . a resolving method through tcp , udp , ip multicast and rtp , is present to transfer video . in the chapter five , design a function model in supervise system to accomplish a multi - ways video player in com 在第四章中，着重阐述了网络传输介质、网络通信方式、 tcp ip协议、 ip广播和多播、 socket网络编程等数字视频网络传输的相关技术和知识，根据视频监控系统的特点，提出了适合不同网络环境使用的基于ip组播的udp和tcp协议，并提出了编程模型和实现方法。
Asymmetrical digital subscriber loop ( adsl ) is a prevalence fashion of broadband solutions today . it uses the installed base of copper telephone line as the transmission medium . with the combined use of sophisticated signal modulate methods and the high speed digital signal process technology , it ' s upstream speed can be 100kbps to 800kbps and the downstream delivers from 1mbps to 8mbps 不对称数字用户线（ adsl ， asymmetricaldigitalsubscriberloop ）是目前比较流行的宽带接入方式，它使用现有的铜质电话线作为传输介质，采用先进的信号调制方式和高速的数字信号处理技术相结合，上行速度为100kbps 800kbps ，下行速度为1mbps 8mbps 。
Ethernet technology will be used popularly in the control of the home and community , but the communication system through the low - voltage power lines is still in research . it is predictable that the power line network based on the spread spectrum will be of great significance in the future 以太网是一种非常成熟的技术，在未来的社区信息传输中必将得到广泛应用，而低压电力线作为传输介质还在研究之中，基于扩频通讯的电力载波技术一旦得到应用，将具有很大的经济意义。
In the aspect of building network , we take the star topology as the network topology - structure , take tcp / ip widely used as the network protocol , take the super 5 types no shields twisted pair and glass fibers as the network transmission media , and adopt the ethernet technology as the lan building network scheme 在组网方面，以星型结构为网络拓扑结构，以广泛使用的tcp ip作为网络协议，以超5类非屏蔽双绞线和光缆作为网络传输介质，采用以太网技术作为局域网组网方案。
According to the standard of can agreement the message agreement for the system has been designed . whose design thinking and its realizing way of the three kernel parts ( can kard ^ can oriented object and field communicatioan interface moudule ) in the system have been given . it is applied by the oriented subject technigue , and through the analyses of ststic characteristic , and dynamic characteristic of the equipment , the configuration tool category has been gotten to complete the configuration to equipment 系统通过传输介质把监控中心和现场通信接口模块挂接在can总线上，组成一个控制器局域网络，从而实现对各种在线通信电源设备的分散控制、统一管理；根据can协议的规范设计了系统的通信协议，给出了系统中三大核心部分( can适配卡、 can中继器和现场通信接口模块)的设计思路和实现方式，并给出了相关硬件电路的结构框图以及软件设计流程图；运用面向对象技术，通过对设备的静态特征和动态特征的分析，得到其组态工具- -类，完成对设备的组态。
At present , this network mainly through adds the security machine to guarantee information safe transmission and so on simple status authentication , but also lacks the effective method in guarantee information the confirmation , the authorization , the secret and the integrity . specially in the wireless network transmission , as a result of the transmission medium openness , causes its security to appear for is still important , how solves the network security becomes one extremely impatient question 目前,该网络主要通过加保密机、简单身份认证等手段保证信息的安全传输,还缺少有效的手段保证信息的验证、授权、机密性和完整性,特别是在无线网络传输中,由于传输介质的开放性,使得其安全性就显得犹为重要,如何解决网络安全性就成为一个非常迫不及待的问题。
The thesis is composed of 9 parts : the background , significance , main topics and innovations in the thesis are introduced in chapter 1 ; in chapter 2 , the main function and performance of interface circuits are described from the view of system by using the example of gigabit ethernet ' s transceiver ; the transmission media ' s frequency characteristics and model are analyzed for the high - speed data transmission system in chapter 3 ; the line driver is presented in chapter 4 ; the equalization principles for high - speed data transmission system are introduced in chapter 5 ; a novel adaptive equalizer for 1000base - cx transceiver is presented in chapter 6 ; in chapter 7 , a fixed equalizer for 2 . 5gbps transceiver is described ; in chapter 8 , layout design and measured results are discussed ; at last , the conclusions are drawn in chapter 9 . during period of finishing the thesis , i read lots of literatures about the interface circuits in high - speed data transmission system , studied their principles and design techniques , and designed : 1 、 the line driver for 2 . 5gbps baseband copper cable transceiver ; 2 、 the fixed equalizer for 2 . 5gbps baseband copper cable transceiver ; 3 、 the fixed equalizer for 1 . 5gbps sata ( serial at attachment ) transceiver ; 4 、 an adaptive equalizer for 1000base - cx transceiver 论文由9部分组成：在第一章引言中介绍了论文的背景、意义、国内外研究现状，以及论文的主要内容和创新；第二章以千兆位以太网为例，从系统的角度介绍了高速数据传输系统接口电路的主要功能和性能指标；第三章分析了高速数据传输系统的传输介质的频率特性和模型；第四章描述了线驱动器的设计原理及其电路实现；第五章描述了高速数据传输系统的均衡原理；第六章描述了适用于1 . 25gbps基带铜缆收发器系统的自适应均衡器的设计原理和电路实现；第七章描述了适用于2 . 5gbps基带铜缆收发器系统和1 . 5gbps串行硬盘接口( sata )收发器系统的固定均衡器的设计原理及其电路实现；在第八章中分析了电路的版图设计及芯片测试结果；最后，第九章总结了全文。在完成论文期间，查阅了大量的有关高速数据传输系统接口电路方面的文献，较系统地学习了线驱动器、传输线和均衡器等方面的理论知识和电路设计原理，设计了用于： ( 1 ) 2 . 5gbps基带铜缆收发器系统的线驱动器； ( 2 ) 2 . 5gbps基带铜缆收发器系统的固定均衡器； ( 3 ) 1 . 5gbpssata系统的固定均衡器； ( 4 ) 1 . 25gbps基带铜缆收发器系统的自适应均衡器。
The author believe that copper cable will be replaced by fiber as the development of network , but now most fiber lan use a switch with fiber interface to get full - duplex operation , and the most important obstacle in deploying fiber lan is the high price of the switch . only some big company can afford the fiber switch and the switches often work in man . in order to lower the costs of gigabit optical lan , this paper presents a workgroup optical network base on passive star coupler ( psc ) 作者坚信，随着网络技术的发展，光纤一定会代替铜缆成为网络的主流传输介质，目前光纤本身的价格也可以为客户所接受；但是影响光纤介质的局域网推广普及的一个重要因素，就是目前市面上的光网络都采用了全双工交换机，而光纤接口的交换机尤其是千兆位的交换机价格很高，多用于校园网或城域网；只有极少数大型企业能够负担，影响了光纤网络的部署。
According as the standard can protocol , the author has constituted communicationr protocol for the fcev system . specially , the project introduces fiber transport medium which have stronger ability of anti jamming and establishes distributed control system . and it has been already applied successfully in the vehicles system 基于标准的can协议，制定了适合于燃料电池电动汽车的通信协议，引入了抗干扰能力强的光纤传输介质，构建了分布式控制系统，并成功应用到fcev整车系统中。
Additionally , the device has a rs232 / rs485 interface through which industry controlling collectors or special detectors can connect to it directly . the device takes the mobile communication network as its transport media , so it is helpful to realize modern vocation management and automatic data collection . it provides a perfect 另外,设备提供了工业标准的rs - 232 / rs - 485接口,可以直接与专业工控采集设备、专业的侦测器连接;以移动通信网络作为传输介质,有助于实现行业管理现代化、数据采集自动化等目标,为行业用户机器到机器( machinetomachine , m2m )的无线数据传输业务提供服务,为终端设备无线联网提供了很好的方案。
