摘要：

TCP-Illinois拥塞控制算法适用于有线高速网络,应用于无线网络时容易受噪声干扰导致数据丢包现象比较严重。为此,提出一种改进的拥塞控制算法TCP-NewIllinois,通过瓶颈队列的积压程度判定拥塞丢包,在拥塞发生时利用带宽估计值调整拥塞窗口和慢启动阈值,提高无线网络带宽利用率。NS3平台上的仿真结果表明,与TCP-Illinois算法相比,TCP-NewIllinois算法具有更高的无线网络吞吐量及传输效率。

关键词: 网络拥塞控制, TCP-Illinois算法, 无线丢包, 带宽估计, NS3仿真

Abstract:

TCP-Illinois is a congestion control algorithm for wired high-speed network.When applied to wireless networks,there is a serious problem of random packet loss caused by noise interference.Therefore,an improved congestion control algorithm TCP-NewIllinois is proposed.The packet loss is determined by the backlog of bottleneck queues.When congestion occurs,the congestion window and slow start threshold are adjusted by bandwidth estimation to improve the bandwidth utilization of wireless network.Simulation results on NS3 platform show that compared with TCP-Illinois algorithm,TCP-NewIllinois algorithm has higher wireless network throughput and transmission efficiency.

Key words: network congestion control, TCP-Illinois algorithm, wireless packet loss, bandwidth estimation, NS3 simulation

中图分类号: 

• TP391