Method and system for measuring out-of-order degree of data packets

The invention relates to a method and a system for measuring out-of-order degrees of data packets. The method comprises the following steps of: acquiring a receiving sequence number and a corresponding serial number of each data packet; according to the receiving sequence numbers of the data packets, composing an actual vector of the serial number of each data packet; acquiring a serial number of a first data packet according to the receiving sequence numbers of the data packets, estimating the serial numbers of other data packets according to the serial number of the first data packet and the receiving sequence numbers of the data packets, and then according to the receiving sequence numbers of the data packets, composing an expected vector of the serial number of each data packet, which is obtained by estimation, according to the receiving sequence numbers of the data packets; and subtracting the actual vector from the expected vector to obtain a result vector, wherein the out-of-order degrees of the corres