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随着用户对数据传输要求的不断提高,数据业务量特别是IP业务量成爆炸式增长。数据业务所具有的高带宽、突发性强等特点,对原建立在以TDM交换为基础的SDH网络带来了巨大的挑战。文中阐述了现有的几种针对现有网络的演进的新技术,并从现有网络应用角度重点分析了城域网的发展趋势。
With the continuous improvement of data transmission requirements, data traffic, especially IP traffic, has exploded. Data services with high bandwidth, strong burst and other characteristics of the original established in the TDM exchange-based SDH network has brought a huge challenge. In this paper, several existing new technologies for the evolution of existing networks are elaborated, and the development trend of MANs is analyzed emphatically from the perspective of existing network applications.