| Wireless communication plays an important role in daily life communication and military communication.Due to the unlicensed wireless frequency bands and the complexity of communication scenarios,the interference problem of wireless communication has always been the primary problem affecting the quality of data transmission.As a kind of spread spectrum technology,frequency hopping technology randomly hops the frequency band of data communication to ensure that it is difficult for the jammer to perceive the regularity of the communication frequency band,thereby improving the security of data transmission.Most of the current research on frequency hopping anti-jamming technology considers the design of frequency hopping patterns.The description of the jamming characteristics of the jammer is not accurate enough,and there are few studies that consider the anti-jamming performance from the characteristics of jamming attacks.Therefore,this paper will focus on data transmission under the interference of malicious attackers and the problem of communication conflicts in the wireless network,and take the data transmission success rate of the node and the transmission delay of the wireless network as the measurement indicators,optimizing the performance of uncooperative frequency hopping anti-interference algorithm.Meanwhile,this paper proposes the anti-jamming algorithm of the node and the network resource scheduling strategy in the interference environment.The main work and innovations of this paper are as follows:1.Considering different types of jammers,the characteristics of static jamming,dynamic jamming and scanning jamming attacks are described,Besides,the models of jamming nodes,network nodes and communication conflicts are defined.Meanwhile,We propose the frequency hopping anti-interference algorithm,which establish channel evaluation vector to select non-interfering channel for transmission,update channel evaluation weight by transmission success rate,thus the success of data transmission is improved and defend static jamming and scan jamming.At the same time,our algorithm dynamically adjust transmission time slot to ensure that the transmission time of the message is lower than the interference frequency of defend dynamic interference.Finally,the antijamming effectiveness of the algorithm against three kinds of disturbances is illustrated.2.The anti-interference problem and network resource scheduling problem in the interference environment are studied in depth.First,considering the scale of resource scheduling,the network can be divided into geographical areas to reduce the scheduling scale.Then,the network transmission delay optimization in the interference environment is defined.The problem of anti-interference of potential interference and conflict avoidance of communication nodes are transformed into the joint scheduling problem of channel time slot resources,so the message delay optimization is transformed into the optimal scheduling decision of the leader node for messages;Besides,a dynamic topology diagram of all nodes in the partition that changes with time slot and a priority scheduling strategy based on the number of remaining messages to be transmitted are established.Finally,the optimality of the strategy is explained.3.A wireless communication simulation platform based on OMNeT++simulation software is build,this paper introduces the overall architecture of the simulation project,including the functions of the communication node module,interference node module,configuration module and so on,Finally,we simulate the anti-jamming algorithm and resource scheduling algorithm,and the experimental results are given. |
