时间同步设备主控系统软件设计

发布时间：2018-04-15 00:02

本文选题：时间同步 + PTP　；参考：《电子科技大学》2014年硕士论文

【摘要】：随着电信级运营商新网络的建设,特别是3G的网络特点,运营商在时间同步上的需求也越来越明显,并且变得必不可少。而目前,运营商主要采用的是在每个基站上部署GPS接收模块来实现基站的时间同步,为基站提供精确的授时。但是,随着网络的迅速发展,这种方式越来越不能满足运营商的需求,另外,还有GPS本身的不可靠性,不安全性和部署的局限性,其原有时间同步方式的缺点也逐渐暴露,急需要采用更高可靠,更安全的授时方式来解决上述问题。针对此种情况,设计一种高精度的时间服务器设备,来为3G网络提供统一精度的、可靠的时间同步系统。该设备符合当前电信级用户的技术要求,可以为提供北斗(BD)/GPS系统的定时信号,并且以地面参考信号为备份,提供稳定可靠、高性能的时间同步信号和频率同步信号。而随着时间同步技术的发展,时间编码的不断更新,特别是PTP技术的应用越来越广泛,从设备的精度来看,也不断的提高,必然从us级的精度向ns级的精度进行发展。本文首先论述了时间同步的基本概念,随后对时间同步设备的需求、设计思路进行了阐述,然后对总体设计方向进行了说明,对主控系统的设计进行了详细的阐述,尤其是FPGA部分和软件设计部分进行了详细的描述,设计了时间同步设备的主控系统。其中,FPGA设计部分对FPGA的编译环境、资源使用情况、以及内部各个功能模块进行说明。而软件设计部分,主要针对uClinux部分和U-BOOT部分的实现进行了说明。u Clinux设计在于它的启动,系统源码的修改和新增设备驱动。U-BOOT设计在于对U-BOOT进行移植和新增驱动。由于时间有限,时间的同步设备的主控系统系统功能测试还不够完善,也未在现网上进行实际的运用,肯定存在一定的问题,需要以后通过实际的应用来进行完善。该主控系统完成了对了设备的参考接入,信号输出,网管控制,以及最为重要的精度控制。作为系统中最核心的部分,基本实现了开始的设计需求,能够满足电信级运营商的业务需求,使该系统可以投入商业应用。
[Abstract]:With the construction of new network for telecom operators, especially the characteristics of 3G networks, the needs of operators in time synchronization become more and more obvious, and become essential.At present, the operators mainly use to deploy the GPS receiving module on each base station to realize the time synchronization of the base station, and to provide accurate timing for the base station.However, with the rapid development of the network, this method can not meet the needs of operators more and more. In addition, there is the unreliability, insecurity and limitation of deployment of GPS itself, and the shortcomings of its original time synchronization mode are gradually exposed.There is an urgent need for a more reliable and secure time-sharing approach to solve the above problems.In view of this situation, a high precision time server device is designed to provide a unified and reliable time synchronization system for 3G networks.The equipment meets the technical requirements of current telecom users and can provide the timing signal of BDN / GPS system, and take the ground reference signal as backup to provide stable, reliable and high performance time synchronization signal and frequency synchronization signal.With the development of time synchronization technology and the continuous updating of time coding, especially the application of PTP technology is becoming more and more extensive. From the point of view of the accuracy of the equipment, it is necessary to develop from the accuracy of us class to the accuracy of ns level.This paper first discusses the basic concept of time synchronization, then describes the requirements of time synchronization equipment, design ideas, then explains the overall design direction, and describes the design of the main control system in detail.Especially, the FPGA part and the software design part are described in detail, and the main control system of the time synchronization equipment is designed.In this part, the compiling environment, resource usage and internal function modules of FPGA are described.In the part of software design, the implementation of uClinux and U-BOOT is mainly explained. The design of .u Clinux lies in its startup, and the modification of system source code and the design of new device driver. U-BOOT is to transplant and add driver to U-BOOT.Because of the limited time, the function test of the main control system of the synchronous equipment of time is not perfect enough, and it has not been used in practice on the present network, so there must be some problems, which need to be used to perfect the system in the future.The main control system completes the reference access, signal output, network management control, and most important precision control of the correct equipment.As the core part of the system, the initial design requirements are basically realized, which can meet the business needs of telecom operators and enable the system to be put into commercial application.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN919.34

【相似文献】