【摘要】 研究一种基于P2P的多媒体服务发布平台,用于提供多媒体数据的传输和处理服务。平台将多媒体服务分割成小的服务元,并将它们按预先定义的规则离散到一个P2P网络中去,对服务元可以是:对多媒体数据进行的编码转换,对音频/视频数据进行的有损压缩,或者提供具有QoS保证的数据传输与路由等。平台根据用户终端特性和具体的服务定制生成服务需求,在P2P网络中动态的查找并连接服务元,以构建一个可以提供对应服务的服务链路,因此平台具有自适应的特性。平台基于内容可索引网络(Content Addressable Network),目标系统通过理论分析和局域网内的仿真进行验证。更多还原

【Abstract】 In this paper,an adaptive multimedia service delivery platform is described based on P2P,which can be used to provide transport and processing services of multimedia data.This platform decomposes a multimedia service into small service units,and distributes them into a P2P network according to a predefined principle.These service units can be transcoding and/or downscaling of audio/video data,QoS aware transport and routing.The platform generates service requirements based on the characteristics of end user terminals and subscribed service needs,then searches for corresponding service units group to construct a service link to provide required service,and therefore is adaptive.The designed platform in this paper is based on content addressable network.The resulting system is verified by theoretical analysis and a simulation in local network.更多还原