光传输网的演进及其在3G网中的解决方案

3G网络是一个以数据业务为中心，支持语音、数据和多媒体业务融合的全新网络。而传统的光传输网络存在配置复杂、带宽利用率低、成本高、网络和业务扩展性差等缺点，无法满足3G网络的需求。而随着多业务传输平台（MSTP）、波分复用（WDM）和自动交换光网络（ASON）等技术的引入，上述这些问题能够得到较为满意的解决。3G接入传输网络的主要解决方案是基于同步数字体系（SDH）的MSTP技术，核心传输网络的主要解决方案是ASON＋WDM技术。

Evolution of Optical Transport Networks and Its Solution in 3G Networks

3G network is a new generation mobile network that supports not only voice services, but also multimedia services, focusing on data service. Since 3G network is launched to provide high-speed data services, the traditional Optical Transport Network (OTN) with complex configuration, low utilization rate of bandwidth, high cost and the poor expansibility can't meet the requirements of 3G transport network. For solving the abovementioned problems, such technologies as Multi Service Transport Platform (MSTP), Wavelength Division Multiplexing (WDM), and Automatically Switched Optical Network (ASON) can be introduced. MSTP technology based on Synchronous Digital Hierarchy (SDH) is recommended as the main solution for 3G access transport network,and the ASON+WDM technology is for 3G core transport network.