摘要： 提出了一种简单实时端到端带宽测量方法。该方法基于TCP协议的应答(ACK)机制和滑动窗口机制,在源端记录每个分组的ACK返回时间,获取时间间隔,计算瞬时测量带宽,为消除时间扩展和压缩对测量值的影响,设计了指数加权移动平均滤波器,获得稳定带宽值,同时记录往返时间最小值并计算往返时间平均值,可为TCP协议拥塞控制,调节发送速率提供依据。该方法克服了基于TCP协议测量方法实现复杂的缺点。

关键词: 拥塞控制, TCP, 测量, 在线, 端到端

Abstract: This paper proposes a simple real-time end-to-end bandwidth measurement method based on investigation on main current measurement technology. This method combines packet ACK and sliding window mechanism of TCP, the source records receiving time of every packet ACK and calculates interval of two sequential packets in one window, so the instantaneous bandwidth is obtained. And exponential weighted moving average filter is designed to eliminate the impact of time expand and time compress in bandwidth measurement procedure.This method is simpler implementation than other TCP-based measurement method.

中图分类号: 

• TP393