In this paper,we focus on providing data provenance auditing schemes for distributed denial of service(DDoS)defense in intelligent internet of things(IoT).To achieve effective DDoS defense,we introduce a two-layer col...In this paper,we focus on providing data provenance auditing schemes for distributed denial of service(DDoS)defense in intelligent internet of things(IoT).To achieve effective DDoS defense,we introduce a two-layer collaborative blockchain framework to support data auditing.Specifically,using data scattered among intelligent IoT devices,switch gateways self-assemble a layer of blockchain in the local autonomous system(AS),and the main chain with controller participation can be aggregated by its associated layer of blocks once a cycle,to obtain a global security model.To optimize the processing delay of the security model,we propose a process of data pre-validation with the goal of ensuring data consistency while satisfying overhead requirements.Since the flood of identity spoofing packets,it is difficult to solve the identity consistency of data with traditional detection methods,and accountability cannot be pursued afterwards.Thus,we proposed a Packet Traceback Telemetry(PTT)scheme,based on in-band telemetry,to solve the problem.Specifically,the PTT scheme is executed on the distributed switch side,the controller to schedule and select routing policies.Moreover,a tracing probabilistic optimization is embedded into the PTT scheme to accelerate path reconstruction and save device resources.Simulation results show that the PTT scheme can reconstruct address spoofing packet forward path,reduce the resource consumption compared with existing tracing scheme.Data tracing audit method has fine-grained detection and feasible performance.展开更多
文章深入研究物联网中的窄带物联网(Narrow Band Internet of Things,NB-IoT)技术,重点探讨基于省电模式(Power Saving Mode,PSM)机制的优化方法,分析NB-IoT的数学原理,研究一种基于PSM机制的动态调整算法,并利用MATLAB平台上的Simulin...文章深入研究物联网中的窄带物联网(Narrow Band Internet of Things,NB-IoT)技术,重点探讨基于省电模式(Power Saving Mode,PSM)机制的优化方法,分析NB-IoT的数学原理,研究一种基于PSM机制的动态调整算法,并利用MATLAB平台上的Simulink工具进行仿真实验。实验结果显示,相比传统方法,文章方法能显著降低平均功耗,在实际应用中具有有效性和稳定性。展开更多
窄带物联网(NarrowBand Internet of Things,NB-IoT)是实现万物互联重要的通信技术,其为了扩大通信覆盖范围和提高可靠性而牺牲了时延等性能指标,且难以动态适应移动物联网设备.对此,本文提出了一种适用于移动设备的NB-IoT无线电资源配...窄带物联网(NarrowBand Internet of Things,NB-IoT)是实现万物互联重要的通信技术,其为了扩大通信覆盖范围和提高可靠性而牺牲了时延等性能指标,且难以动态适应移动物联网设备.对此,本文提出了一种适用于移动设备的NB-IoT无线电资源配置方案.该方案通过卡尔曼滤波对物联网设备的移动位置进行预测,建立数学模型对通信可靠性进行估计,开展了块误码率、时延、能耗等性能指标的量化分析,并提出了无线电资源配置的优化模型和方法.本文基于真实数据集开展了仿真实验,对该方案的有效性进行了验证,实验结果显示该方案能保证移动物联网设备与基站连接的同时降低时延.展开更多
基金supported by the Fundamental Research Funds under Grant 2021JBZD204 and 2022RC006in part by the National Natural Science Foundation of China under Grant 62201029in part by the China Postdoctoral Science Foundation under Grant Grant BX20220029 and 2022M710007.
文摘In this paper,we focus on providing data provenance auditing schemes for distributed denial of service(DDoS)defense in intelligent internet of things(IoT).To achieve effective DDoS defense,we introduce a two-layer collaborative blockchain framework to support data auditing.Specifically,using data scattered among intelligent IoT devices,switch gateways self-assemble a layer of blockchain in the local autonomous system(AS),and the main chain with controller participation can be aggregated by its associated layer of blocks once a cycle,to obtain a global security model.To optimize the processing delay of the security model,we propose a process of data pre-validation with the goal of ensuring data consistency while satisfying overhead requirements.Since the flood of identity spoofing packets,it is difficult to solve the identity consistency of data with traditional detection methods,and accountability cannot be pursued afterwards.Thus,we proposed a Packet Traceback Telemetry(PTT)scheme,based on in-band telemetry,to solve the problem.Specifically,the PTT scheme is executed on the distributed switch side,the controller to schedule and select routing policies.Moreover,a tracing probabilistic optimization is embedded into the PTT scheme to accelerate path reconstruction and save device resources.Simulation results show that the PTT scheme can reconstruct address spoofing packet forward path,reduce the resource consumption compared with existing tracing scheme.Data tracing audit method has fine-grained detection and feasible performance.
文摘文章深入研究物联网中的窄带物联网(Narrow Band Internet of Things,NB-IoT)技术,重点探讨基于省电模式(Power Saving Mode,PSM)机制的优化方法,分析NB-IoT的数学原理,研究一种基于PSM机制的动态调整算法,并利用MATLAB平台上的Simulink工具进行仿真实验。实验结果显示,相比传统方法,文章方法能显著降低平均功耗,在实际应用中具有有效性和稳定性。
文摘窄带物联网(NarrowBand Internet of Things,NB-IoT)是实现万物互联重要的通信技术,其为了扩大通信覆盖范围和提高可靠性而牺牲了时延等性能指标,且难以动态适应移动物联网设备.对此,本文提出了一种适用于移动设备的NB-IoT无线电资源配置方案.该方案通过卡尔曼滤波对物联网设备的移动位置进行预测,建立数学模型对通信可靠性进行估计,开展了块误码率、时延、能耗等性能指标的量化分析,并提出了无线电资源配置的优化模型和方法.本文基于真实数据集开展了仿真实验,对该方案的有效性进行了验证,实验结果显示该方案能保证移动物联网设备与基站连接的同时降低时延.
