自适应的端到端可用带宽测量方法

Self adaptive method for end-to-end available bandwidth estimation

提出了一种轻负载的、自适应的端到端可用带宽测量方法。在低负载链路下,计算探测包对距离增大的概率,结合输出探测包距离分布,得到可用带宽。在此基础上通过探测包输出包距离对称度区分链路负载情况,自适应地采用合适的可用带宽计算方法。仿真实验表明,相比之前方法,本方法测量时间少、准确性高、测量开销小。

A low overhead, self adaptive method for end-to-end available bandwidth estimation was proposed. Firstly, on low utilization path, the mathematic equation between the probability that input probe gap increases caused by CT packets and the distribution of output probe gap was set up, and then CT load was derived from the equation. Secondly, a metric called gap symmetry （GS） was proposed to weigh the busyness degree of a network path, and the self adaptive availaisle bandwidth estimation method based on GS was presented. NS-2 simulations show that compared with previous methods, our method shows its advantages in terms of measurement time, accuracy, and overhead.