SDH技术虽然解决了PDH技术时代中存在的很多缺陷,但随着SDH网络的日益扩大,电路量的急剧增加,SDH网络及其技术本身也暴露出一些问题.在电信运营商进入全面竞争的今天,如何引入新技术来弥补SDH技术缺陷,降低运营成本,提高网络差异化服务能力和业务的可靠性,增强网络竞争能力,成为当下各大电信运营商关注的热点.本文从SDH网络的演进和存在的问题角度入手,就为什么引入ASON技术,如何引入ASON技术以及ASON技术发展前景等方面作了全面的分析和论述.%The SDH technology patches up many deficiencies of the PDH technology. However; the SDH technology is proved to have certain problems when the SDH network is expanding and the number of circuits is increasing. A new technology is a must to patch up the deficiencies of the SDH technology when telecom carriers are confronting fierce competitions and hoping to reduce operation costs; enhance the service reliability and capability of providing differentiated network services; and make their network competitive. Considering the evolution of SDH network and its problems; this paper makes a thorough analysis about rationale; methods; and technical perspectives of using the ASON technology in the SDH network.
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