城域内数据业务的快速发展促使运营商建设高效率、高容量的城域网。然而,目前城域传送网络面临的一个最大问题是,所有的业务都是由分离独立的传送设备来完成,而发展在同一网络平面解决语音、数据业务的综合传送需要的城域网络是下一代网络的必然趋势,因而,MSTP与RPR便引起业内人士普遍的关注,这是两种有潜力的城域传送技术,本文在对比过程中深入探讨它们的技术特点及其应用。 The rapid development of data services in metropolitan area has prompted operators to build MANs with high efficiency and high capacity. However, at present, one of the biggest problems that the metro transport network faces is that all the services are completed by separate transport devices. The metropolitan area network that needs to develop integrated transport of voice and data services on the same network plane is the next generation Therefore, MSTP and RPR have aroused widespread concern in the industry. This is the two potential technologies for metropolitan area transmission. In this paper, their technical features and their applications are discussed in depth.