Trust-based situation data fusion method of distributed sensor network

• Main Authors: ZHENG BO, LIU FAN, LI FANGWEI, SUN SUI, DENG WU, NIE YIFANG
• Format: Patent
• Language: English
• Published: 11.03.2015
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; WIRELESS COMMUNICATIONS NETWORKS

The invention relates to the field of situation data fusion of the wireless sensor network, particularly to trust-based situation data fusion method of a distributed sensor network. An event fusion center receives event occurrence states detected by all association sensing nodes, determines whether events occur or not, and adjusts credibility of the association sensing nodes; fusion centers carry out fusion processing on event data detected by all association sensing nodes; and a base station receives fusion values of all fusion centers, carries out the second fusion to obtain secondary fusion numerical values, detects consistency of the fusion centers, and issues a final fusion data result. According to the invention, steps of event detection, situation data fusion and consistency detection are carried out. Fusion weights are distributed based on credibility of the sensing nodes and the historical credibility, the time relevancy, and the data relevancy are taken into consideration. Therefore, phenomena of information concealing and false information providing can be effectively prevented; the wrong detection probability is reduced; a network performance in a state with large occupation ratio of the normal sensing node number can be improved; the fusion value is close to the actual value; and the data accuracy and reliability are improved.