中文摘要：

文章将元数据框架引入到内容传递网（简称CDN）中,利用元数据给出和平台无关的用户、终端、网络和内容等信息的描述,利用元数据网关获取和解析源自各种资源和系统的描述信息,综合获取的信息导出优化的控制策略,由此实现具有自适应特性的环境感知功能的内容传递网.

英文摘要：

This paper introduces metadata framework into Content Delivery Network, to get the information about users, terminals, network and content by metadata, and to retrieve and parse the information of all kinds of resource and systems by metadata gateway, to educe the optimized control policy by integrating the information above, thus the RBCDN has the auto-adaptive characteristic is realized.