传送网技术与光通信的新发展

Latest Conditions of Transport Networking Technologies and Optical Communications

传送网络技术一方面继续向高速率、大容量的方向发展,如多通路10Gbit/s系统的商用化和大规模采用,另一方面,SDH组网技术上也出现了一些新特点,比如超长复用段保护环和VC-4级联技术采用等。而数字包封技术的标准化更将会大大促进下一代传送网——光传送网的发展。在传送网未来的发展中,N×10Gbit/s WDM将成为发展重点,而由于诸多因素的存在,IP over SDH仍是目前长途传输的最佳技术选择。

The transport network is developing towards high speed and high capacity such as multi-channel 10 Gbit/ s systems; whereas the SDH networking features some new characters, such as the adoption of superlong multiplexing segment protection rings and VC-4 cascading technology.The standardization of the Digital Wrapper will greatly promote the development of the next-generation transport network-optical transport network.The N x 10Gbps WDM will become the focal point in the development of the transport network in the futute.Due to various reasons, IP over SDH is still the best option for long-distance transmission at present.