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分析现有CATV网中IP传输技术现状,介绍一个新的数据链接协议(SDL:Simple Data Link),提出一个改进的传输方案(IP over SDL over SDH),该方案在变长数据传输的高速实现及对所传输数据传输过程中的安全性上比传统的基于HDLC数据链路协议的SDH有着更优越的性能,且该方案能在兼容现有ATM,SDH传输技术基础上实现高速高质量的数据业务传输。
This paper analyzes the status quo of IP transmission technology in existing CATV networks, introduces a new data link protocol (SDL) and proposes an IP over SDL over SDH protocol. This scheme is based on the high-speed implementation of variable-length data transmission And has more superior performance than the traditional SDH based on the HDLC data link protocol in the security of the transmitted data and can realize high-speed and high-quality data based on compatible existing ATM and SDH transmission technologies Business transmission.