This paper introduces the characters of resilient packet ring (RPR) technologies, and the advantages of RPR comparing to SDH/SONET and Ethernet when provides data services in ring topology.

• 介绍了弹性分组环 (RPR)技术的特征 ；将其与 SDH/ SONET、以太网技术作了对比 ；以体现其在环型拓扑结构上支持数据业务的优势 .