Abstract: Considering the problem of vital object recognition for C⁴ISR system under confrontation condition, a vital object recognition method based on operation traffic mining is proposed. The system operation traffics are collected, the operation data packet describing model is established based on six attribute group described method. The operation traffic association matrix and connectivity matrix are built based on the source IP and destination IP address on data packet. The inflow and outflow operation traffics about system node are counted, and the system vital computation model is established based on statistical traffics as the measurement criteria of system object importance. Some area air defense operation command system is taken under simulation experiment environment, and the vital system object test verification is carried out. The test result shows that the vital object identification method can efficiently identify important object. Compared with the traditional method, the new method can avoid the problem of vital object identification failure brought by incomplete information.

Key words: C⁴ISR system, operation traffic, important object identification, complex network