基于最优化的多媒体多播速率控制

传输多媒体流的一种有效方法是采用多速率多播,但多速率多播的速率控制面临许多挑战,如异构性、公平性、实时性及服务质量(QoS)等。提出了一种两阶段优化的策略进行多媒体多播速率控制。把问题公式化为求系统效用最大化的最优化问题,推导出有效的算法。方法综合考虑了服务质量、异构性等,且满足协议间的公平性和多播会晤内各接收者间的公平性。仿真实验表明算法的有效性,与现有的算法相比系统总效用大大提高。

Optimization based multimedia multicast rate control

It was an efficient method that transmitting multimedia traffic uses multi-rate multicast.However,rate control for multi-rate multicast becomed more difficult due to the heterogeneity,fairness,real-time constraints,and quality of ser-vice.Presented a two-phase optimization-based strategy for multimedia multicast rate control.Formulated the problem as an optimization problem,which maximized the total receiver utility,and derived an efficient algorithm.This multi-rate multicast control scheme can solve problems such as QoS and heterogeneity,and can achieve both the inter-protocol fairness and inter-receiver fairness.Simulation results show that the proposed solution is effective and compared with other schemes,the total system utility improves.