关键词: 可用带宽, 非液体流模型, 多跳链路, 背景流量, 测量精度

Abstract: Most of the available bandwidth measurement technologies are based on singlehop and the fluid model, which cannot get high accuracy in the situation of multihop path and bursty cross traffic. Therefore, a nonfluid model was analyzed and a method of parameters setting was introduced to reduce the impacts of packet size, cross traffic rate, probe traffic rate on measurement accuracy. A developed structure of packetpair, combined with setting the Time To Live (TTL) value, reduced the measurement error of packetpair spacings, which improved the robustness of the method in the context of a multihop path. The NS2 simulation results show that the measurement accuracy is improved by the parameter setting method based on nonfluid model and improved packet structure.

Key words: available bandwidth, non-fluid model, multi-hop path, cross traffic, measurement accuracy