为提升计算机的网络性能,更好地避免拥塞现象的发生,需要对其进行必要的技术控制。鉴于此,对基于TCP/IP协议的网络拥塞控制方法进行分析。在TCP拥塞控制中主要采用TCP Tahoe,TCP Reno,TCP New Reno以及TCP Sack四种方法,其中TCP New Ren...为提升计算机的网络性能,更好地避免拥塞现象的发生,需要对其进行必要的技术控制。鉴于此,对基于TCP/IP协议的网络拥塞控制方法进行分析。在TCP拥塞控制中主要采用TCP Tahoe,TCP Reno,TCP New Reno以及TCP Sack四种方法,其中TCP New Reno对快速恢复算法进行了改进,通过对TCP协议中的Reno进行可视化处理,实行对网络拥塞的有效管理。而IP拥塞控制方法则分为FIFO,FQ和WFQ,RED以及ECN四种类型,通过队列调度管理方式实现了对网络拥塞的有效管理。展开更多
本文研究基于TCP/IP协议栈的嵌入式系统在网络智能设备中的测控应用设计。以Rabbit2000网络微处理器和Dynam ic C软件开发环境为例,阐述构建嵌入式W ebServer的具体技术及相关的实现方案;详细介绍了实现TCP、UDP报文进行网络通信、串行...本文研究基于TCP/IP协议栈的嵌入式系统在网络智能设备中的测控应用设计。以Rabbit2000网络微处理器和Dynam ic C软件开发环境为例,阐述构建嵌入式W ebServer的具体技术及相关的实现方案;详细介绍了实现TCP、UDP报文进行网络通信、串行口数据通信和对网络智能设备的测控技术等,并给出系统硬件原理框图和有关软件实现的程序代码及流程图。展开更多
The industrial Internet of Things(IIoT)is a new indus-trial idea that combines the latest information and communica-tion technologies with the industrial economy.In this paper,a cloud control structure is designed for...The industrial Internet of Things(IIoT)is a new indus-trial idea that combines the latest information and communica-tion technologies with the industrial economy.In this paper,a cloud control structure is designed for IIoT in cloud-edge envi-ronment with three modes of 5G.For 5G based IIoT,the time sensitive network(TSN)service is introduced in transmission network.A 5G logical TSN bridge is designed to transport TSN streams over 5G framework to achieve end-to-end configuration.For a transmission control protocol(TCP)model with nonlinear disturbance,time delay and uncertainties,a robust adaptive fuzzy sliding mode controller(AFSMC)is given with control rule parameters.IIoT workflows are made up of a series of subtasks that are linked by the dependencies between sensor datasets and task flows.IIoT workflow scheduling is a non-deterministic polynomial(NP)-hard problem in cloud-edge environment.An adaptive and non-local-convergent particle swarm optimization(ANCPSO)is designed with nonlinear inertia weight to avoid falling into local optimum,which can reduce the makespan and cost dramatically.Simulation and experiments demonstrate that ANCPSO has better performances than other classical algo-rithms.展开更多
针对在8/16位低速处理器上实现传输控制协议(Transfer Control Protocol TCP)过于复杂的问题,通过对TCP协议进行简化,减轻了微处理器的运算负担,降低了对系统存储空间的要求,使得TCP协议能够在8/16位低速处理器上实现.嵌入式网络中大量...针对在8/16位低速处理器上实现传输控制协议(Transfer Control Protocol TCP)过于复杂的问题,通过对TCP协议进行简化,减轻了微处理器的运算负担,降低了对系统存储空间的要求,使得TCP协议能够在8/16位低速处理器上实现.嵌入式网络中大量使用长度很小的数据帧,使得网络带宽利用率极低,为此在协议中应用了Na-gle算法,减少了协议所需带宽,提高了协议的吞吐率.采用NS-2(Network Simulator-2)进行的仿真结果表明:该方案是有效的,现已经在普通8位处理器上实现,并通过了在多种宽带网络上进行的测试,在网络电能表中得到了实际应用.展开更多
文摘为提升计算机的网络性能,更好地避免拥塞现象的发生,需要对其进行必要的技术控制。鉴于此,对基于TCP/IP协议的网络拥塞控制方法进行分析。在TCP拥塞控制中主要采用TCP Tahoe,TCP Reno,TCP New Reno以及TCP Sack四种方法,其中TCP New Reno对快速恢复算法进行了改进,通过对TCP协议中的Reno进行可视化处理,实行对网络拥塞的有效管理。而IP拥塞控制方法则分为FIFO,FQ和WFQ,RED以及ECN四种类型,通过队列调度管理方式实现了对网络拥塞的有效管理。
文摘本文研究基于TCP/IP协议栈的嵌入式系统在网络智能设备中的测控应用设计。以Rabbit2000网络微处理器和Dynam ic C软件开发环境为例,阐述构建嵌入式W ebServer的具体技术及相关的实现方案;详细介绍了实现TCP、UDP报文进行网络通信、串行口数据通信和对网络智能设备的测控技术等,并给出系统硬件原理框图和有关软件实现的程序代码及流程图。
文摘The industrial Internet of Things(IIoT)is a new indus-trial idea that combines the latest information and communica-tion technologies with the industrial economy.In this paper,a cloud control structure is designed for IIoT in cloud-edge envi-ronment with three modes of 5G.For 5G based IIoT,the time sensitive network(TSN)service is introduced in transmission network.A 5G logical TSN bridge is designed to transport TSN streams over 5G framework to achieve end-to-end configuration.For a transmission control protocol(TCP)model with nonlinear disturbance,time delay and uncertainties,a robust adaptive fuzzy sliding mode controller(AFSMC)is given with control rule parameters.IIoT workflows are made up of a series of subtasks that are linked by the dependencies between sensor datasets and task flows.IIoT workflow scheduling is a non-deterministic polynomial(NP)-hard problem in cloud-edge environment.An adaptive and non-local-convergent particle swarm optimization(ANCPSO)is designed with nonlinear inertia weight to avoid falling into local optimum,which can reduce the makespan and cost dramatically.Simulation and experiments demonstrate that ANCPSO has better performances than other classical algo-rithms.
文摘针对在8/16位低速处理器上实现传输控制协议(Transfer Control Protocol TCP)过于复杂的问题,通过对TCP协议进行简化,减轻了微处理器的运算负担,降低了对系统存储空间的要求,使得TCP协议能够在8/16位低速处理器上实现.嵌入式网络中大量使用长度很小的数据帧,使得网络带宽利用率极低,为此在协议中应用了Na-gle算法,减少了协议所需带宽,提高了协议的吞吐率.采用NS-2(Network Simulator-2)进行的仿真结果表明:该方案是有效的,现已经在普通8位处理器上实现,并通过了在多种宽带网络上进行的测试,在网络电能表中得到了实际应用.
