以太网供电技术在光通信节点设备中的设计和实现

发布时间：2018-04-19 21:01

本文选题：以太网供电 + IEEE802.3at　；参考：《武汉邮电科学研究院》2014年硕士论文

【摘要】：自以太网诞生之日起,以太网都是用来传输数据,以太网设备都需要外接电源适配器或者自备蓄电池才能工作。2003年底发布的IEEE802.3af标准让数据信号和直流电源能够同时在一根网线上传输成为了可能,但随着新的应用对功率需求的越来越大,于2009年发布了新一代的IEEE802.3at标准,该标准为以太网应用扩宽了应用领域,使得以太网供电技术成为了具有广阔应用前景的新兴技术。本文针对基于PowerPC的光通信节点设备进行了重新设计,主要是在基于MPC8306微处理器上,完成光通信节点设备的最小系统的设计,使用以太网供电技术给最小系统提供稳定电源供应,同时根据最小系统的功能将其划分为处理器、存储器、网口、串行调试接口、供电复位等模块,并完成各个模块的设计,从而达到以下目的：(1)光通信节点设备能够使用PoE系统供电；(2)基于MPC8306的最小系统能够完成对系统各个业务卡的监控以及控制；(3)根据系统对电磁兼容性的特殊要求,解决设备在特殊要求下的电磁干扰问题；(4)完成系统的软件设计,方便系统管理。本论文设计了主要的硬件电路,包括PSE、PD、供电芯片、CPLD、复位电路、时钟分配,DDR2电路,Flash电路、通信接口电路。同时对以太网供电系统的设计方法做了详细的分析,对系统硬件设计中的电磁兼容性设计做了详细说明并提出了可靠的解决方案,针对该最小系统开发,给出了几个主要模块的主程序流程图和配置信息等,以完成对业务卡的控制和监控。
[Abstract]:Since the birth of Ethernet, Ethernet has been used to transmit data. Ethernet devices require external power adapters or self-contained batteries to work. The IEEE802.3af standard issued at the end of 2003 made it possible for data signals and DC power to be transmitted simultaneously over a network line. However, with the increasing demand for power from new applications, a new generation of IEEE802.3at standards was released in 2009, which broadens the application fields of Ethernet applications and makes Ethernet power supply technology a new technology with broad application prospects. In this paper, the optical communication node equipment based on PowerPC is redesigned, mainly based on the MPC8306 microprocessor, the minimum system of the optical communication node equipment is designed, and the power supply technology of Ethernet is used to provide the stable power supply to the minimum system. At the same time, according to the function of the minimum system, it is divided into processor, memory, network port, serial debugging interface, power supply reset and other modules, and the design of each module is completed. Thus, the following objectives are achieved: 1) the optical communication node equipment can use the PoE system to supply power. (2) the minimum system based on MPC8306 can complete the monitoring and control of each service card of the system. (3) according to the special requirements of the system for electromagnetic compatibility, To solve the problem of electromagnetic interference (EMI) under special requirements, the software design of the system is completed and the system management is facilitated. In this paper, the main hardware circuits are designed, including PSEP, CPLD, reset circuit, clock distribution DDR2 circuit, Flash circuit and communication interface circuit. At the same time, the design method of Ethernet power supply system is analyzed in detail, the electromagnetic compatibility design in the hardware design of the system is explained in detail, and a reliable solution is put forward. The main program flow chart and configuration information of several main modules are given in order to control and monitor the business card.
【学位授予单位】：武汉邮电科学研究院
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN929.1

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