Research On Safety Protection In Industrial Wireless Sensor Network

Industrial wireless sensor networks are used for observing and controlling various industrial tasks.It is a new emerging application of wireless sensor networks.Industrial wireless sensor networks face more security threats than wireless sensor networks because of their own characteristics.Jamming attack is one of the difficulties that industrial wireless sensor network security must face and solve.In recent years,domestic and foreign scholars have studied the anti-jamming attack and jamming attack detection,and obtained some research results.However,the research on the security of jamming attacks in industrial wireless sensor networks is still a challenging issue,and needs to be further studied.Based on this,this paper studies the problems derived from jamming attacks,such as anti-jamming attack methods,detection of jamming attacks,and routing recovery mechanisms of nodes by jamming attack.The main research contents of this paper include the following sections.(1)Research on hybrid anti-jamming attack method in industrial wireless sensor networks.To solve the constraint of Pre-shared-key exiting in the traditional spread spectrum technology,use an uncoordinated frequency hopping spread spectrum communication during the network initialization phase.To avoid the problem of high energy consumption caused by the continue using of uncoordinated frequency hopping spread spectrum,the two communication nodes generate a corresponding frequency hopping sequence and use the traditional frequency hopping spread spectrum communication.To improve the anti-attack capability jamming network,introduce the uncoordinated frequency hopping spread spectrum.To evaluate the effectiveness of the proposed anti-jamming attack approach,the targeted intelligent jamming attack model is used.The simulation results show that the anti-jamming attack method can effectively resist the jamming attack.The network can maintain a low packet drop rate under the targeted jamming attacks,and can maintain a good resistance with the deterioration of environment.(2)Research on intrusion detection of jamming attack in industrial wireless sensor networks.Packet delivery failure rate is chosen as the metric attribute,and the upper and lower limits of the corresponding control chart are calculated.By monitoring packet delivery failure rate of sensor nodes in the control chart,the node is judged in the state of being attacked by jamming attack or not.Based on the time synchronization channel hopping technology used in the WirelessHART standard for industrial wireless sensor networks,a jamming attack model is established to verify the effectiveness of the intrusion detection method.The simulation results show that the detection method of jamming attack can effectively detect whether a node is in the state of being attacked by jamming attack with a lower failure rate,and also with a smaller amplitude variation of the missing rate as the deterioration of the environment.(3)Research on route recovery mechanism of nodes by jamming attack in industrial wireless sensor networks.The jamming attack detection method is used to detect node of being attacked by jamming attack,thereby dividing the jamming attack area,and then restarting the blocked node in the area.The uncoordinated frequency hopping spread spectrum is used to regenerate the frequency hopping sequence of the node in the state of being attacked by jamming attack and the surrounding nodes.These nodes use the new frequency hopping sequence to perform conventional frequency hopping spread spectrum.The jamming attack detection method is used to detect these nodes.If it is in a normal state,no operation is performed;otherwise,uncoordinated frequency hopping spread spectrum communication is performed,and rejoined the node of being attacked by jamming attack to the network graph route by balanced route.