【作者】 吴燮炜；

【导师】 赵咸红；

【作者基本信息】 武汉邮电科学研究院 ， 通信与信息系统， 2009， 硕士

【摘要】 传统的移动回程网络都是基于TDM和ATM技术的。然而,随着可提供话音,数据和视频等多媒体业务的移动电话和各种移动电子产品的大量增加和普及,进而带来的对带宽容量和可靠性要求的不断增长,对现有的移动回程网络形成了巨大的挑战,现有的移动回程网络技术已难以跟上其步伐。为了解决这个问题,移动运营商和设备制造商都把目光转向了电信级以太网。本课题从电信级以太网的技术优势出发,分析了为什么电信级以太网技术是移动回程网络的最佳选择方案,研究了将电信级以太网技术应用到移动回程网络中所需要解决的流量分级、业务应用和网络同步等问题。针对流量分级和电信级以太网业务应用的问题,本课题提出了一种流量整形的功能,利用这种功能不仅能够实现移动回程网络业务流量分级的要求,还能更好地将电信级以太网业务应用到移动回程网络。另外,为了满足移动回程网络同步的要求,本课题提出了一种基于协议的同步方式,通过这种方式不仅能够实现电信级以太网同步,还能将精确度提高到纳米级。最后,还介绍流量整形的功能在电信级以太网设备平台上的测试结果,并对结果进行了分析。更多还原

【Abstract】 Up until now, mobile backhaul networks have been realized using TDM and ATM technologies. However, these networks are no longer capable of keeping pace with the bandwidth capacity and reliability requirements of increasingly popular voice, data and video broadband applications on mobile devices. To resolve this problem, Carrier Ethernet network are thought by mobile operators and equipment manufacturers.This paper introduces the technologic advantages of Carrier Ethernet, and explains the question of why Carrier Ethernet for mobile backhaul. Then we analyze the requirements of Ethernet services in mobile backhaul networks, which include class of service requirements, applying MEF service definitions to mobile backhaul and synchronization requirements. To meet these demands, this paper presents a traffic shaping algorithm and an Ethernet time synchronization method. The traffic shaping algorithm not only resolves the problem of traffic classification, but also improves the applying MEF service definitions to mobile backhaul much better. And the time synchronization method is based on timestamp exchanging protocols. It could enhance the synchronous time precision up to nanosecond level.In the end, this paper describes the implementation and test results of traffic shaping algorithm on a Carrier Ethernet multi-service platform.更多还原