基于Packet over SDH的以太网业务接入的设计实现

POS（Packet over SDH)是一项新兴的技术，它能够在传统的SDH传输平台上提供灵活和高效的数据业务支持，从而实现网络功能的增值。目前，POS作为IP宽带传送技术得到了广泛应用，特别是在城域网建设中受到人们的青睐。在现有的SDH设备中开发POS接口能极大地提高产品的竞争力，推动网络建设的发展。本文提出了一种在SDH设备中实现以太接入的整体解决方案，并介绍了基于FPGA设计的POS方案的设计思想和结构。该方案实现效率高，充分考虑了传输的可靠性，并且易于扩展。

Design and implementation of Ethernet access based on Packet over SDH

POS(Packet over SDH) is an emerging technology,which provides flexible and effective data service access on conventional SDH networks.Nowadays,it has been widely used,especially in Metro-network.Developing POS interface for existing SDH equipment makes important sense for improving its attraction and boosting network construct.In this paper,a system solution is proposed for implementing Ethemet interface for SDH equipment,in which key POS technologies are designed on FPGA.The solution has advantages of high efficiency,reliability and scalabiliy.