一种新的多速率多播拥塞控制策略

doi:10.3969/j.issn.1000-0801.2010.08.015

Abstract

Abstract:

This paper introduced a new multi-rate multicast congestion control strategies to meet layered multicast receivers' heterogeneity in available bandwidth. This receiver-driven congestion control strategy,adjusting the the number of layers and the rate of each layer dynamically according to the changes of network situation,using the optimal layer rate allocation algorithm to meet the receivers' heterogeneity in available bandwidth. TCP-equation is a generally used to estimate receivers' the available bandwidth. Simulation results show that the strategy make good performance on TCP-friendliness. Meanwhile it can optimize overall throughput.

Key words: multi-rate multicast, congestion control, throughput

Dagang Gu,Mu Zhang,Junrong Yan. A New Multi-Rate Layered Multicast Congestion Control Strategy[J]. Telecommunications Science, 2010, 26(8): 66-70.

参数	定义
n	接收者的个数
w	实际分层数量
d（S）	在S中接收者的集
Q_m	加入第m层的接收者可用带宽的集1≤m≤w
（q_m, c_m）	c_m为可用带宽为q_m的接收者的数量
D	D=｛d₁, d₂, …, d_n｝为接收者实际得到的接收速率
L	编码算法所允许的最大分层数量
Q	Q =｛q₁, q₂, …, q_n｝接收者可用带宽的集，按带宽递
	增顺序排列
\|Q_m\|	Q_m的势
G_r	编码粒度
r_m	第m层的编码速率1≤m≤w
r_b	算法允许的基本层最小层速率
R	R=｛R₁,R₂, …,R_w｝层速率分配解
	（R₁=r₁,R_m=i=1∑r_m,1＜m≤w）

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A New Multi-Rate Layered Multicast Congestion Control Strategy

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