四元分组测量模型:一种测量网络瓶颈带宽的新机制

针对分组对测量模型的不足,提出了四元分组测量模型.该模型利用一个测量四元组内两个分组对的差值关系,抵消了数据链路层和物理层对测量分组长度的影响,具有较高的测量精度.实测和ns-2仿真结果表明,该测量模型具有更高的测量精度和更强的稳健性.

Packet Tetrad Model: A New Method for Measuring Bottleneck Bandwidth

Existing algorithms for measuring the network bottleneck bandwidth are mostly based on the packet pair model. Intrinsic error exists in packet pair model due to the effect of data link layer and physical layer. Incorrect results result due to the filter algorithm with a heavy network load. To resolve these problems, a new model called packet tetrad model is proposed. Because of the difference relation between the two packet pairs in a packet tetrad, disturbance in the data link layer and the physical layer may be eliminated. The packet tetrad model has a high accuracy in measurement. Results of simulated measurements under the ns-2 environment and the actual measurements of networks show that the packet tetrad mode is more accurate and robust than the packet pair model.