In an ad hoc network, it is usually difficult to optimize the assignment of network routing resources using a single type of routing protocol due to the differences in network scale, node moving mode and node distribu...In an ad hoc network, it is usually difficult to optimize the assignment of network routing resources using a single type of routing protocol due to the differences in network scale, node moving mode and node distribution. Therefore, it is desirable to have nodes run multiple routing protocols simultaneously so that more than one protocols can be chosen to work jointly. For this purpose, a multiple routing platform for Ad hoc networks is proposed on a higher level of current routing protocols. In order to ensure the security of the platform, a security mechanism and its formal analysis by BAN logic is given. The simulation results of the network performance demonstrate that the proposed multi-routing platform is practicable in some complex applications.展开更多
The airspace communication network based on spacecraft has a wide range of applications in regional information enhancement and emergency communication. In this paper, a routing algorithm for congestion degree detecti...The airspace communication network based on spacecraft has a wide range of applications in regional information enhancement and emergency communication. In this paper, a routing algorithm for congestion degree detection of multipath routing (CD_AOMDV) is proposed. The method of combining the whole congestion degree detection and local congestion degree detection before service initiation is adopted. Timely and accurate judgment of the congestion degree reduced the loss rate of the hot nodes, so the average packet loss rate reduced. Simulation results show that compared with the traditional AOMDV protocol, the CD_AOMDV proposed in this paper has reduced the packet loss and improved delay performance, which is more suitable for the airspace communication network.展开更多
随着化工行业朝着智能化方向发展,化工反应系统频繁遭受网络攻击,产生了严重的后果。现有工控安全仿真研究大多单独在网络领域进行,缺少针对化工反应系统的工控安全仿真技术。因此,针对该问题,以化工反应系统中常见的连续搅拌式反应釜(c...随着化工行业朝着智能化方向发展,化工反应系统频繁遭受网络攻击,产生了严重的后果。现有工控安全仿真研究大多单独在网络领域进行,缺少针对化工反应系统的工控安全仿真技术。因此,针对该问题,以化工反应系统中常见的连续搅拌式反应釜(continuous stirred tank reactor,CSTR)为研究对象,提出一种针对CSTR的工控安全虚实融合仿真技术。首先建立CSTR控制系统模型,提出了基于攻击类型分析、攻击仿真方法、响应分析方法与攻击监测和控制方法的工控安全虚实融合仿真技术框架,利用CSTR工控安全仿真平台,实现了针对CSTR系统的攻击模拟和响应分析,并验证了提出的针对网络攻击的监测和控制方法,为推动网络安全在化工领域内的研究提供了借鉴。展开更多
虚拟局域网(Virtual Local Area Network,VLAN)扩展技术中的嵌套(QinQ)技术和映射(Mapping)技术更好地解决了传统VLAN在标签数量限制、跨域互通瓶颈、用户隔离等方面的问题。为了探究这两种技术的工作原理与适用场景,利用华为企业网络...虚拟局域网(Virtual Local Area Network,VLAN)扩展技术中的嵌套(QinQ)技术和映射(Mapping)技术更好地解决了传统VLAN在标签数量限制、跨域互通瓶颈、用户隔离等方面的问题。为了探究这两种技术的工作原理与适用场景,利用华为企业网络仿真平台(Enterprise Network Simulation Platform,eNSP)搭建对比实验环境,构建网络拓扑,配置运行命令,验证测试不同终端之间的连通性,数据抓包分析数据标签封装过程,总结不同技术在扩展能力、隔离效果、配置复杂度等方面的区别。实验结果表明,QinQ技术更适用于大规模隔离需求,Mapping技术更适用于跨域网络动态配置场景,二者可以同时应用于1台设备,互补提升了VLAN扩展的灵活性与部署效率。展开更多
文摘In an ad hoc network, it is usually difficult to optimize the assignment of network routing resources using a single type of routing protocol due to the differences in network scale, node moving mode and node distribution. Therefore, it is desirable to have nodes run multiple routing protocols simultaneously so that more than one protocols can be chosen to work jointly. For this purpose, a multiple routing platform for Ad hoc networks is proposed on a higher level of current routing protocols. In order to ensure the security of the platform, a security mechanism and its formal analysis by BAN logic is given. The simulation results of the network performance demonstrate that the proposed multi-routing platform is practicable in some complex applications.
文摘The airspace communication network based on spacecraft has a wide range of applications in regional information enhancement and emergency communication. In this paper, a routing algorithm for congestion degree detection of multipath routing (CD_AOMDV) is proposed. The method of combining the whole congestion degree detection and local congestion degree detection before service initiation is adopted. Timely and accurate judgment of the congestion degree reduced the loss rate of the hot nodes, so the average packet loss rate reduced. Simulation results show that compared with the traditional AOMDV protocol, the CD_AOMDV proposed in this paper has reduced the packet loss and improved delay performance, which is more suitable for the airspace communication network.
文摘随着化工行业朝着智能化方向发展,化工反应系统频繁遭受网络攻击,产生了严重的后果。现有工控安全仿真研究大多单独在网络领域进行,缺少针对化工反应系统的工控安全仿真技术。因此,针对该问题,以化工反应系统中常见的连续搅拌式反应釜(continuous stirred tank reactor,CSTR)为研究对象,提出一种针对CSTR的工控安全虚实融合仿真技术。首先建立CSTR控制系统模型,提出了基于攻击类型分析、攻击仿真方法、响应分析方法与攻击监测和控制方法的工控安全虚实融合仿真技术框架,利用CSTR工控安全仿真平台,实现了针对CSTR系统的攻击模拟和响应分析,并验证了提出的针对网络攻击的监测和控制方法,为推动网络安全在化工领域内的研究提供了借鉴。
文摘虚拟局域网(Virtual Local Area Network,VLAN)扩展技术中的嵌套(QinQ)技术和映射(Mapping)技术更好地解决了传统VLAN在标签数量限制、跨域互通瓶颈、用户隔离等方面的问题。为了探究这两种技术的工作原理与适用场景,利用华为企业网络仿真平台(Enterprise Network Simulation Platform,eNSP)搭建对比实验环境,构建网络拓扑,配置运行命令,验证测试不同终端之间的连通性,数据抓包分析数据标签封装过程,总结不同技术在扩展能力、隔离效果、配置复杂度等方面的区别。实验结果表明,QinQ技术更适用于大规模隔离需求,Mapping技术更适用于跨域网络动态配置场景,二者可以同时应用于1台设备,互补提升了VLAN扩展的灵活性与部署效率。
