A Congestion Aware Slow-Start Algorithm for TFRC Protocol

JIANG Yi; WU Chun-ming; JIANG Ming

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A Congestion Aware Slow-Start Algorithm for TFRC Protocol

更新时间：2025-07-16

- A Congestion Aware Slow-Start Algorithm for TFRC Protocol
- Acta Electronica Sinica Vol. 37, Issue 5, Pages: 1025-1029(2009)
- 作者机构：
  
  1. 浙江大学人工智能研究所,浙江,杭州,310027
  2. 杭州电子科技大学计算机学院,浙江,杭州,310018
  3. 浙江大学人工智能研究所浙江杭州,310027
  4. 杭州电子科技大学计算机学院浙江杭州,310018
- 作者简介：
- 基金信息：
- DOI：
  CLC： TP393
- Published：2009
- 稿件说明：
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JIANG Yi, WU Chun-ming, JIANG Ming. A Congestion Aware Slow-Start Algorithm for TFRC Protocol[J]. Acta Electronica Sinica, 2009, 37(5): 1025-1029.
DOI：

JIANG Yi, WU Chun-ming, JIANG Ming. A Congestion Aware Slow-Start Algorithm for TFRC Protocol[J]. Acta Electronica Sinica, 2009, 37(5): 1025-1029. DOI：

摘要

本文分析了TFRC(TCP-Friendly Rate Control)协议在慢启动阶段采用类似TCP协议的倍增发送速率机制存在的问题

提出了一种利用回路响应时间(Round Trip Time

RTT)来自适应调节慢启动阶段速率的算法.通过分析实际RTT值和EWMA(Exponentially Weighted Moving Average)处理后的平均RTT值来感知网络当前的拥塞状况

以调节发送速率的激进程度.仿真实验表明

该方法对TFRC协议具有明显的改进作用

减少了慢启动阶段结束时的报文丢失率

提高了协议的传输平稳度和吞吐量

从而能更有效地适应多媒体流的传输要求.

Abstract

This paper analyzes the problem of TFRC (TCP-Friendly Rate Control) protocol in slow-start phase in which the sending rate increases exponentially like that in the TCP protocol

and proposes a method of using round trip time (RTT) to adjust the sending rate adaptively in this phase.The method can detect the network congestion degree by comparing the sample RTT with the average RTT and then adjust the aggressiveness of sending rate in slow-start phase.The simulation results indicate that with this method

TFRC reduces the packet loss rate before entering the congestion avoid phrase

and improves the throughput and smoothness property

thus meeting the requirements of multimedia stream more effectively.

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