基于OSU的M-OTN组网模式与现网试验

OSU based M-OTN networking modes and field trial

基于光业务单元(optical service unit,OSU)的面向城域优化的光传送网络(metro-optimized OTN,M-OTN)创新技术方案可以提供低时延和带宽灵活调整的高品质专线业务,提升光传送网络(optical transport network,OTN)对小颗粒专线业务的承载能力和效率。重点探讨了OSU技术在OTN中的应用模式,包括OSU在现网中的应用价值、叠加层(Overlay)与底层(Underlay)组网模式比较、OSU到光数据单元k(optical data unit-k,ODUk)复用方式与多业务统一承载等几个方面。通过现网试验对OSU技术的业务能力和长期运行可靠性进行了充分验证,为后续OSU组网模式的选择提供技术依据。

The innovative optical service unit(OSU)based on M-OTN technologies can provide high-quality private line services with low latency and flexible bandwidth,and improve the networking capability and efficiency of OTN for small granularity services.The application mode of M-OTN/OSU technologies in the OTN were discussed,including the value OSU brings,the comparison of Overlay vs.Underlay networking modes,multiplexing modes of OSU into ODUk and multi-service unified transport.The service capability and long-term operational reliability of OSU technology were fully verified through the field trial network,which provides a technical basis for the selection of OSU networking modes.