Controller

摘要： Software-Defined Networking(SDN)enables flexibility in developing security tools that can effectively and efficiently analyze and detect malicious network traffic for detecting intrusions.Recently Machine Learning(ML)techniques have attracted lots of attention from researchers and industry for developing intrusion detection systems(IDSs)considering logically centralized control and global view of the network provided by SDN.Many IDSs have developed using advances in machine learning and deep learning.This study presents a comprehensive review of recent work ofML-based IDS in context to SDN.It presents a comprehensive study of the existing review papers in the field.It is followed by introducing intrusion detection,ML techniques and their types.Specifically,we present a systematic study of recent works,discuss ongoing research challenges for effective implementation of ML-based intrusion detection in SDN,and promising future works in this field.

摘要： Providing comfortable indoor air quality control in residential construction is an exceedingly important issue.This is due to the structure of the fast response controller of air quality.The presented work shows the breakdown and creation of a mathematical model for an interactive,nonlinear system for the required comfortable air quality.Furthermore,the paper refers to designing traditional proportional integral derivative regulators and proportional,integral,derivative regulators with independent parameters based on a backpropagation neural network.In the end,we perform the experimental outputs of a suggested backpropagation neural network-based proportional,integral,derivative controller and analyze model results by applying the proposed system.The obtained results demonstrated that the proposed controller can provide the required level of clean air in the room.The proposed developed model takes into consideration international Heating,Refrigerating,and air conditioning standards as ASHRAE AND ISO.Based on the findings,we concluded that it is possible to implement a proposed system in homes and offer equivalent indoor air quality with continuous mechanical ventilation without a profuse amount of energy.

摘要： Software-defined networking(SDN)is a paradigm shift in modern networking.However,centralised controller architecture in SDNimposed flow setup overhead issue as the control plane handles all flows regardless of size and priority.Existing frameworks strictly reduce control plane overhead and it does not focus on rule placement of the flows itself.Furthermore,existing frameworks do not focus on managing elephant flows like RTSP.Thus,the proposed mechanism will use the flow statistics gathering method such as random packet sampling to determine elephant flow and microflow via a predefined threshold.This mechanism will ensure that the control plane works at an optimum workload because the controller only manages elephant flows via reactive routing and rule placement respectively.Reactive routing has reduced link bandwidth usage below the pre-defined threshold.Furthermore,rule placement has increased average throughput and total transfer to 238%.Meanwhile,the data plane switches will be able to forward microflows via multipath wildcard routing without invoking controller in greater responding time by 85 ms faster in two Transmission Control Protocol(TCP)traffic and achieved 11%and 12%higher total transfer size and throughput respectively.Hence,the controller’s workload reduced significantly to 48%in two TCP traffic.

摘要： The emergence of a new network architecture,known as Software Defined Networking(SDN),in the last two decades has overcome some drawbacks of traditional networks in terms of performance,scalability,reliability,security,and network management.However,the SDN is vulnerable to security threats that target its controller,such as low-rate Distributed Denial of Service(DDoS)attacks,The low-rate DDoS attack is one of the most prevalent attacks that poses a severe threat to SDN network security because the controller is a vital architecture component.Therefore,there is an urgent need to propose a detection approach for this type of attack with a high detection rate and low false-positive rates.Thus,this paper proposes an approach to detect low-rate DDoS attacks on the SDN controller by adapting a dynamic threshold.The proposed approach has been evaluated using four simulation scenarios covering a combination of low-rate DDoS attacks against the SDN controller involving(i)a single host attack targeting a single victim;(ii)a single host attack targeting multiple victims;(iii)multiple hosts attack targeting a single victim;and(iv)multiple hosts attack targeting multiple victims.The proposed approach’s average detection rates are 96.65%,91.83%,96.17%,and 95.33%for the above scenarios,respectively;and its average false-positive rates are 3.33%,8.17%,3.83%,and 4.67%for similar scenarios,respectively.The comparison between the proposed approach and two existing approaches showed that it outperformed them in both categories.

摘要： The controller is indispensable in software-defined networking(SDN).With several features,controllers monitor the network and respond promptly to dynamic changes.Their performance affects the quality-of-service(QoS)in SDN.Every controller supports a set of features.However,the support of the features may be more prominent in one controller.Moreover,a single controller leads to performance,single-point-of-failure(SPOF),and scalability problems.To overcome this,a controller with an optimum feature set must be available for SDN.Furthermore,a cluster of optimum feature set controllers will overcome an SPOF and improve the QoS in SDN.Herein,leveraging an analytical network process(ANP),we rank SDN controllers regarding their supporting features and create a hierarchical control plane based cluster(HCPC)of the highly ranked controller computed using the ANP,evaluating their performance for the OS3E topology.The results demonstrated in Mininet reveal that a HCPC environment with an optimum controller achieves an improved QoS.Moreover,the experimental results validated in Mininet show that our proposed approach surpasses the existing distributed controller clustering(DCC)schemes in terms of several performance metrics i.e.,delay,jitter,throughput,load balancing,scalability and CPU(central processing unit)utilization.

摘要： The Internet of Things has brought a vision to turn the digital object into smart devices by adding an intelligence system and thereafter connecting them to the internet world. These smart devices accumulate environmental information with the help of sensors and act consequently without human intervention. The Internet of Thing is a rapidly growing industry with expected 50 - 200 billion smart devices to connect to the internet. Multi-billions of smart devices will produce a substantial amount of data to provide services to human society, although, it will lead to increase energy consumption at the highest level and drive to high energy bills. Moreover, the flood of IoT devices may also lead to energy scarcity. IoT is nowadays mainly focused on the IT industry and researchers believe the next wave of IoT may connect 1 trillion sensors by 2025. Even if these sensors would have 10 years of battery life, it will still require 275 million batteries to be replaced every day. Therefore, it is a necessity to reduce energy consumption in smart devices. “Presence Aware Power Saving Mode (PA-PSM) Enhancement for IoT Devices for Energy Conservation”, a proposed novel approach in this research paper by the help of a proposed algorithm in this research paper to reduce power consumption by individual devices within smart homes. In the proposed approach, a centralized automation controller keeps the less priority smart devices into deep sleep mode to save energy and experiments suggest the proposed system may help to reduce 25.81% of the energy consumed by smart devices within the smart home.

摘要： Fuzzy logic is an approach which deals with the incomplete information to handle the imperfect knowledge. In the present research paper we have proposed a new approach that can handle the imperfect knowledge, in a broader way that we will consider the unfavourable case also as the intuitionistic fuzzy logic does. The mediative fuzzy logic is an extensive approach of intuitionistic fuzzy logic, which provides a solution, when there is a contradiction in the expert knowledge for favourable as well as unfavourable cases. The purpose of the present paper is to design a mediative fuzzy inference system based Sugeno-TSK model for the diagnosis of heart disease. Our proposed method is the extension of Sugeno-TSK fuzzy logic controller in the form of Sugeno-TSK mediative fuzzy logic controller.

摘要： 本发明公开了一种EasyMesh网络多Controller实现方法，包括：在EasyMesh网络中，扩展现有EasyMesh协议Controller角色，在现有Controller‑AP角色的前提下，增加Assi‑Controller‑AP角色；Controller‑AP和Assi‑Controller‑AP地位平等，分别管控接入自己域的Agent‑AP及Station；在Controller‑AP和Assi‑Controller‑AP间建立具有相同VLAN的专用同步管理通道，该专用同步管理通道与数据业务隔离；整个多Controller的EasyMesh网络具有相同的SSID和密码。本发明技术方案可以极大的提高EasyMesh网络拓扑的灵活性，降低EasyMesh树形网络多级级联的问题，有效改善和拓展用户出口路径，实现用户Internet接入的负载均衡。本发明还提供了相应的EasyMesh网络多Controller系统。

摘要： 本申请揭示了一种工业物联网下实现Controller和Worker服务联合的方法及系统，该方法包括根据路由信息进行聚合，为相同的路由统一分配Controller服务和Worker服务；当添加新增路由并启动数据传输任务时，判断是否有相同路由的Controller服务启动，若有则更新已启动的Controller服务的路由信息；若无则从Controller服务池和Worker服务池中分别选取空闲的Controller服务、Worker服务分配给新增路由，并启动新增路由对应的Controller服务和Worker服务。本申请在路由信息中Kafka集群发生变化时，Controller自动更新路由配置无需运维人员操作干预；根据路由规则自动拓展新的路由链路，解决Controller和Worker服务的拓展性。

摘要： 本发明实施例公开了一种使用BMC Flash备份Controller Device韧体的装置和方法，装置包括启动模块、控制模块和升级模块，所述启动模块连接控制模块和升级模块，所述升级模块连接控制模块；所述启动模块用于伺服器启动，所述升级模块用于韧体升级，所述控制模块用于韧体启动和韧体升级的切换；方法包括：将待升级韧体暂存至BMC RAM中；所述BMC检查RAM中待升级韧体的签名和内容是否正确；如升级后的韧体通过检查，则输出升级前后的韧体差异档；所述BMC将韧体差异档写入Backup flash；所述BMC将暂存至RAM中的待升级韧体写入Device flash；Controller Device使用升级后的韧体启动伺服器。本发明实施例解决现有Controller Device韧体备份电路中Device flash的功能和容量受限、电路复杂和占用板卡空间较多的问题。

摘要： 本发明公开了一种抖动控制器(Dither Controller)，属于半导体制造领域。抖动控制器(Dither Controller)包括：AC/DC模块(1)、开关电源(2)、信号控制板(3)、伺服驱动器(4)。该控制器需外接220VAC市电，为AC/DC模块(1)和开关电源(2)提供输入电源；AC/DC模块(1)为伺服驱动器(4)提供直流工作电压；开关电源(2)为信号控制板(3)提供所需的工作电压；信号控制板(3)通过模拟信号控制伺服驱动器(4)输出电流的幅值、波形和频率，同时进行电流反馈信号的采集；外部控制器与信号控制板(3)进行信息的交换。

摘要： 本发明公开了一种EasyMesh网络多Controller实现方法，包括：在EasyMesh网络中，扩展现有EasyMesh协议Controller角色，在现有Controller‑AP角色的前提下，增加Assi‑Controller‑AP角色；Controller‑AP和Assi‑Controller‑AP地位平等，分别管控接入自己域的Agent‑AP及Station；在Controller‑AP和Assi‑Controller‑AP间建立具有相同VLAN的专用同步管理通道，该专用同步管理通道与数据业务隔离；整个多Controller的EasyMesh网络具有相同的SSID和密码。本发明技术方案可以极大的提高EasyMesh网络拓扑的灵活性，降低EasyMesh树形网络多级级联的问题，有效改善和拓展用户出口路径，实现用户Internet接入的负载均衡。本发明还提供了相应的EasyMesh网络多Controller系统。

摘要： 一种基于SAS Controller的数据访问权限控制方法，以MCU为核心，通过I2C总线连接到SAS控制器，从而控制SAS SMP command的读写标志位，在MCU端设置身份识别装置，当身份识别验证通过后，标志位置1，标识可读写，验证失败时，标志位置0，禁止访问，用于服务器及存储产品，通过对底层SAS控制器读写标志位的控制，实现数据访问权限的控制，可以很好的应用于工控、政务、司法、军工等对数据安全性要求较高的领域。

摘要： 本发明公开了基于LoadRunner中Controller组件的场景设计方法，包括步骤：A.在LoadRunner的中编写好测试脚本；B.将编写的测试脚本导入LoadRunner的Controller中；C.在Controller中设置每个脚本的Runtime Setting；D.在Runtime Settings设置界面中选择步骤为“固定时间开始一个新的循环”条件；E.在Controller中选择设置“Group”计划方式以及运行模式；F.在Controller组件中设置每个脚本的运行计划图；G.在Run模块界面中运行场景。本发明的方法可解决性能测试过程中虚拟用户的动作的迭代控制不精准、测试过程中动作的迭代时间和每个动作的响应时间关联性问题。

摘要： 本发明提供在通信产生了错误的情况下能够期待容易地确定其原因的CAN通信系统及错误信息记录装置。在CAN总线上连接监视装置(5)，监视装置(5)判定ECU发送的报文是否包含错误。在发送报文包含错误的情况下，监视装置(5)将与该报文的错误相关的信息作为错误信息(54a)记录于记录部(54)。另外，监视装置(5)具备进行符合CAN协议的通信的CAN控制器(52)和进行各种信息处理的处理器(51)。CAN控制器(52)判定报文发送是否包含错误，在判定为包含错误的情况下通过中断而向处理器(51)通知附于报文的CAN‑ID。