With the reduction in manufacturing and launch costs of low Earth orbit satellites and the advantages of large coverage and high data transmission rates,satellites have become an important part of data transmission in...With the reduction in manufacturing and launch costs of low Earth orbit satellites and the advantages of large coverage and high data transmission rates,satellites have become an important part of data transmission in air-ground networks.However,due to the factors such as geographical location and people’s living habits,the differences in user’demand for multimedia data will result in unbalanced network traffic,which may lead to network congestion and affect data transmission.In addition,in traditional satellite network transmission,the convergence of network information acquisition is slow and global network information cannot be collected in a fine-grained manner,which is not conducive to calculating optimal routes.The service quality requirements cannot be satisfied when multiple service requests are made.Based on the above,in this paper artificial intelligence technology is applied to the satellite network,and a software-defined network is used to obtain the global network information,perceive network traffic,develop comprehensive decisions online through reinforcement learning,and update the optimal routing strategy in real time.Simulation results show that the proposed reinforcement learning algorithm has good convergence performance and strong generalizability.Compared with traditional routing,the throughput is 8%higher,and the proposed method has load balancing characteristics.展开更多
详细介绍了在Linux环境下基于规则的分布式网络入侵检测系统NetNumen.同现有的网络入侵检测系统相比,NetNumen将异常检测(检测包到达频度的异常)和特征检测(检测特定攻击和攻击工具的固有特征)有机地结合起来,对DoS(denial of service),...详细介绍了在Linux环境下基于规则的分布式网络入侵检测系统NetNumen.同现有的网络入侵检测系统相比,NetNumen将异常检测(检测包到达频度的异常)和特征检测(检测特定攻击和攻击工具的固有特征)有机地结合起来,对DoS(denial of service),DdoS(distributed denial of service)攻击的检测效果较现有方法有明显的改善.展开更多
当前互联网协议第6版(Internet Protocol Version 6,Ipv6)远程监控网络通信无法实现互联网协议第4版(Internet Protocol Version 4,Ipv4)地址与Ipv6地址的转换,且对网络状态要求较高,导致通信效率不理想。提出Ipv6远程监控网络无状态双...当前互联网协议第6版(Internet Protocol Version 6,Ipv6)远程监控网络通信无法实现互联网协议第4版(Internet Protocol Version 4,Ipv4)地址与Ipv6地址的转换,且对网络状态要求较高,导致通信效率不理想。提出Ipv6远程监控网络无状态双向通信方法。设计Ipv6网络与Ipv4互联网的地址映射规则,在代理服务器协议栈内引入支持Ipv4与Ipv6的双协议,实现同步访问权限。建立不同协议栈与目的机器的连接,采用代理服务器静态映射表完成Ipv4地址与Ipv6地址静态转换,根据代理服务器生成的socket对象,完成Ipv6网络的无状态双向通信。仿真结果表明,所提方法可有效实施双向通信,且与传统方法相比通信速率优势较为显著。展开更多
基金supported by the National Natural Science Foundation of China(No.U21A20451)the Science and Technology Planning Project of Jilin Province,China(No.20220101143JC)the China University Industry-Academia-Research Innovation Fund(No.2021FNA01003)。
文摘With the reduction in manufacturing and launch costs of low Earth orbit satellites and the advantages of large coverage and high data transmission rates,satellites have become an important part of data transmission in air-ground networks.However,due to the factors such as geographical location and people’s living habits,the differences in user’demand for multimedia data will result in unbalanced network traffic,which may lead to network congestion and affect data transmission.In addition,in traditional satellite network transmission,the convergence of network information acquisition is slow and global network information cannot be collected in a fine-grained manner,which is not conducive to calculating optimal routes.The service quality requirements cannot be satisfied when multiple service requests are made.Based on the above,in this paper artificial intelligence technology is applied to the satellite network,and a software-defined network is used to obtain the global network information,perceive network traffic,develop comprehensive decisions online through reinforcement learning,and update the optimal routing strategy in real time.Simulation results show that the proposed reinforcement learning algorithm has good convergence performance and strong generalizability.Compared with traditional routing,the throughput is 8%higher,and the proposed method has load balancing characteristics.
文摘详细介绍了在Linux环境下基于规则的分布式网络入侵检测系统NetNumen.同现有的网络入侵检测系统相比,NetNumen将异常检测(检测包到达频度的异常)和特征检测(检测特定攻击和攻击工具的固有特征)有机地结合起来,对DoS(denial of service),DdoS(distributed denial of service)攻击的检测效果较现有方法有明显的改善.
文摘当前互联网协议第6版(Internet Protocol Version 6,Ipv6)远程监控网络通信无法实现互联网协议第4版(Internet Protocol Version 4,Ipv4)地址与Ipv6地址的转换,且对网络状态要求较高,导致通信效率不理想。提出Ipv6远程监控网络无状态双向通信方法。设计Ipv6网络与Ipv4互联网的地址映射规则,在代理服务器协议栈内引入支持Ipv4与Ipv6的双协议,实现同步访问权限。建立不同协议栈与目的机器的连接,采用代理服务器静态映射表完成Ipv4地址与Ipv6地址静态转换,根据代理服务器生成的socket对象,完成Ipv6网络的无状态双向通信。仿真结果表明,所提方法可有效实施双向通信,且与传统方法相比通信速率优势较为显著。
