摘要
IP城域网面临着由单一业务承载向多种业务承载的转变。作为数据、语音、视频业务的综合承载网络,IP城域网应满足互联网接入、企业互连、IPTV、软交换/3G等业务的承载以及提供差异化服务的要求。以"统一的路由核心层+接入控制层多边缘+接入层多边缘方案"结构构建的IP城域网具有很强的扩展性、高带宽和价格优势,配合以"大容量、少局所、广覆盖"的布局思路,采用"网络层次化、结构扁平化、业务分离化、接入多样化"的建设方案,IP城域网必将成为各种业务的统一承载平台,成为运营商成功运营的关键基础。
IP Metropolitan Area Network （MAN） is undergoing the transformation from carrying single service to carrying multiple services. As the bearer network of data, voice and video services, IP MAN is supposed to meet the requirements of carrying Internet access, corporation networking, IPTV, softswitch/3G services and providing differentiated services. The IP MAN with the architecture of unified core routing ＋ multi-edge in access control layer ＋ multi-edge in access layer has advantages of scalability, high bandwidth and cost efficiency. Under this archi- tecture, It is suggested to follow the layout idea of ＂large capacity, fewer exchanges and wide coverage＂ and the deployment scheme of ＂layered network, flat structure, separated services and diverse network access.
出处
《现代电信科技》
2008年第9期6-12,共7页
Modern Science & Technology of Telecommunications
关键词
IP城域网
业务
结构
演进
IP MAN
service, architecture, evolution
