基于播放时隙与图像质量的P2P分层流媒体倾斜分配算法  

A skew layered P2P streaming assignment algorithm based on playing timeslot and image quality

作　　者：范典[1] 胡铮[1] 张平[1] 

机构地区：[1]北京邮电大学无线新技术研究所,北京100876

出　　处：《西安石油大学学报（自然科学版）》2008年第2期79-82,88,共5页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：国家高技术研究发展计划(863计划)(编号:2006AA01Z276)

摘　　要：在发送方多源异构、流媒体采用分层编码前提下,综合考虑流媒体数据的播放时隙以及图像质量因素,提出了针对P2P分层流媒体数据分配的倾斜分配算法.该算法适用于多发送方、单接收方情况,以AI MD(Additive Increase and Multiplicative Decrease)原则周期性调整发送数据包量进行拥塞控制,通过倾斜排序算法调整数据包的分配顺序,再根据发送方传输能力的分配数据予以传送,以保障在P2P动态网络环境下的流媒体传输质量.A inclination data assignment algorithm for P2P layered streaming data allocation is proposed under the conditions of multi-source heterogeneous transmit-legs and layered coding streaming,in which the playing timeslot and image quality are comprehensively considered.This algorithm is suitable to the state of multiple transmit-legs and single receive-leg.It controls congestion by periodically adjusting the quantity of the data packets to be sent according to the principle of AIMD(Additive Increase and Multiplicative Decrease and adjusting the allocation order of the data packets according to inclination sorting algorithm,and then it transmits the data packets allocated according to the transmitting capacity of transmit legs.Thus the transmitting quality of streaming media under the environment of P2P dynamic network can be guaranteed.

关 键 词：对等网络 分层流媒体 数据分配 倾斜度 算法 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]