Research on One-way Delay of Network Based on High-resolution Performance Counter
A novel measurement approach for one-way delay is proposed,which is different from conventional measurement based on some assumptions to remove clock offset and skew. Expression of one-way delay is derived from relative relationship between two hosts based on high-resolution performance counter. TCP connection between two hosts is established in order to evaluate the unknown parameter in the delay expression. Values of the performance counter are exchanged in both directions periodically,and the unknown parameter in the delay expression is updated timing by using packet pair theory. The result shows that clock synchronization is not required in the algorithm entirely,and the algorithm has the advantage of high precision and can be measured online. Meanwhile,the algorithm is suitable for measurement in the case of network with asymmetric structure.