After receiving a new data packet, the receiving program may be extracted from the sequence number in the header information out of the expected sequence number, so that can obtain the number of lost traffic.
When a new datamessage is received, the receiver can extract the expected serial number from the serial number in the header information so that it can get the number of missing information streams.
After receiving a new datagram, the receiving program can extract the expected serial number from the serial number in the packet header information, so that the number of lost information streams can be obtained.