较少是公平的:通过缓冲大小来减少RTT不公平
1Department of Computer Networks and Systems, Silesian University of Technology, 44-100 Gliwice, Poland.
Sensors (Basel, Switzerland)
|September 13, 2025
概括
像Cubic和BBR这样的TCP拥堵控制算法面临着在具有不同往返时间 (RTT) 的流程中公平地分配带宽的挑战. 网络配置,特别是缓冲区的大小,显著影响公平性和吞吐量差异.
科学领域:
- 计算机科学 计算机科学
- 网络工程 网络工程
- 数据通信数据通信
背景情况:
- 在具有不同的往返时间 (RTT) 的TCP流中共享瓶带宽是计算机网络中持续存在的挑战.
- RTT不公平导致吞吐量差异,影响整体网络性能和用户体验.
研究的目的:
- 在TCP拥堵控制中调查RTT不公平.
- 在各种网络场景下评估TCP Cubic和TCP BBR的行为.
- 确定促进公平的带宽共享的网络配置.
主要方法:
- 使用Mininet仿真平台进行了广泛的实验.
- 检查了缓冲区大小,发送者分布和延迟不对称性的影响.
- 分析了TCP Cubic和TCP BBR的传输性能指标.
主要成果:
- TCP BBR实现了高利用率与最小的缓冲,但其公平性取决于RTT和缓冲大小的相互作用.
- 当RTT比率是不平衡的主要驱动因素时,TCP Cubic在适度的缓冲区大小下显示出更好的公平性.
- 缓冲大小成为缓解基于RTT的不公平的关键因素.
结论:
- 仔细的缓冲区大小可以显著减少TCP网络中的RTT不公平.
- 排队策略对网络性能和公平的带宽分配有广泛的影响.
- 了解算法特定的行为是优化网络公平性的关键.
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