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2019 27th Iranian Conference on Electrical Engineering (ICEE)最新文献

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Availability Aware SFC Embedding in NFV: A Clustering Approach NFV中可用性感知的SFC嵌入:一种聚类方法
Pub Date : 2019-04-01 DOI: 10.1109/IranianCEE.2019.8786672
Pegah Torkamandi, S. Khorsandi, Bahador Bakhshi
Network Function Virtualization (NFV) was recently proposed to improve the flexibility of network service provisioning and reduce the deployment costs by the decoupling the traditional network functions from the dedicated proprietary hardware equipment and turning them into the software-based virtualized entity, which is called a Virtual Network Function (VNF). Typically, the VNFs are concatenated together in a sequential order to form a Service Function Chains (SFCs) which provide specific services for users. Since failure of each VNF leads to breaking down the entire service chain, it is critical that service providers offer guaranteed and highly available SFCs against the failures. Previous works for simplicity assumed a completely available network infrastructure or just one failure in a same time; further, they increase availability of a SFC by adding dedicated backups which is costly. Unlike previous works, we investigate the problem of guarantying the required availability of SFCs against the multiple failures in a same time with minimum resource consumption. We proposed a new Availability-aware Clustered SFC Embedding (AC-SFC) algorithm which not only satisfies the availability requirement of SFC but also reduces the footprints of backup resource by using the Share Protection Cluster (SPC). Further, this problem is formulated as an Integer Linear Programming (ILP). We proposed a heuristic algorithm to overcome the ILP's complexity and new technique for calculating the availability of SPC. The numerical results show our heuristic algorithm works efficiency and reduces the network resource consumption in different network infrastructure topologies.
网络功能虚拟化(Network Function Virtualization, NFV)是近年来提出的一种网络功能虚拟化技术,它将传统的网络功能从专用的专有硬件设备中分离出来,并将其转化为基于软件的虚拟实体,即虚拟网络功能(Virtual Network Function, VNF),以提高网络服务提供的灵活性和降低部署成本。通常情况下,将多个VNFs按顺序连接在一起,形成一个sfc (Service Function Chains),为用户提供特定的服务。由于每个VNF的故障都会导致整个服务链的中断,因此服务提供商提供有保证的高可用性sfc以应对故障是至关重要的。为了简单起见,之前的工作假设了一个完全可用的网络基础设施,或者在同一时间只有一个故障;此外,它们通过添加昂贵的专用备份来提高SFC的可用性。与以前的工作不同,我们研究的问题是保证sfc在同一时间以最小的资源消耗应对多个故障所需的可用性。提出了一种新的可用性感知集群SFC嵌入(AC-SFC)算法,该算法既满足SFC的可用性要求,又利用共享保护集群(SPC)减少了备份资源的占用。进一步,将该问题表述为整数线性规划(ILP)。我们提出了一种启发式算法来克服ILP的复杂性,并提出了一种计算SPC可用性的新技术。数值结果表明,在不同的网络基础结构拓扑下,启发式算法能够有效地降低网络资源的消耗。
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引用次数: 2
Energy and QoS-Aware Contention-Based Medium Access Control in Machine-Type Communications 机器类型通信中基于能量和qos感知的争用介质访问控制
Pub Date : 2019-04-01 DOI: 10.1109/IranianCEE.2019.8786634
Masoumeh Mokhtari Karchegani, B. S. Ghahfarokhi
Special characteristics of Machine-Type Communications (MTC) result in new challenges in 5G mobile networks including Medium Access Control (MAC) mechanisms. The traditional methods for contention-based MAC are unable to manage a massive number of simultaneous requests. On another side, recent methods for MTCs have not adequately attended to energy consumption of machines along with QoS. In this paper, a method for contention-based massive access protocol is presented based on p-persistent CSMA which considers both energy and delay requirement of machines, a multi-objective optimization problem is solved by BS at the beginning of each time frame in order to find the optimum value of transmission probability based on the number of machines and their distances from the BS. The optimization problem aims at achieving maximum energy efficiency and minimum access delay. To avoid the overhead of solving the optimization problem, the value of probability is temporarily updated by the machine at the end of each time slot, based on its delay requirement and the number of its recent access failures. The simulation results show a considerable increase in the number of successful transmissions, a decrease in access time and improvements in throughput and energy consumption.
机器类型通信(MTC)的特殊特性给5G移动网络带来了新的挑战,包括介质访问控制(MAC)机制。传统的基于争用的MAC方法无法处理大量的并发请求。另一方面,最近的mtc方法没有充分考虑到机器的能量消耗以及QoS。本文提出了一种基于p-persistent CSMA的基于争用的海量接入协议方法,该方法同时考虑了机器的能量和时延需求,并在每个时间帧开始时利用BS求解一个多目标优化问题,根据机器数量及其与BS的距离找到传输概率的最优值。优化问题的目标是实现最大的能源效率和最小的接入延迟。为了避免求解优化问题的开销,概率值由机器根据其延迟需求和最近访问失败的次数在每个时隙结束时临时更新。仿真结果表明,传输成功次数显著增加,访问时间显著缩短,吞吐量和能耗显著提高。
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引用次数: 2
Impact of Steganography on JPEG File Size 隐写术对JPEG文件大小的影响
Pub Date : 2019-04-01 DOI: 10.1109/IranianCEE.2019.8786506
Mohammad Rezaei, S. M. Moghadam
Hiding data in JPEG images is usually performed by modifying quantized DCT coefficients. This will affect the entropy coding and consequently the size of the resulting compressed data. The change in the file size might be used as a feature in steganalysis. In this paper, we investigate the impact of several well-known steganography methods on the size of JPEG file. The experiments show interesting results, where we considered several embedding payloads and quality factors. OutGuess 0.1, OutGuess 0.2, and complementary embedding methods increase the file size, while F5, nsF5, and PQ decrease it. The secure steganography methods J-UNIWARD and SI-UNIWARD almost do not change the file size.
隐藏JPEG图像中的数据通常是通过修改量化的DCT系数来实现的。这将影响熵编码,从而影响最终压缩数据的大小。文件大小的变化可以用作隐写分析中的一个特性。在本文中,我们研究了几种著名的隐写方法对JPEG文件大小的影响。实验显示了有趣的结果,其中我们考虑了几个嵌入有效载荷和质量因素。OutGuess 0.1、OutGuess 0.2和互补嵌入方法增大了文件大小,而F5、nsF5和PQ减小了文件大小。安全隐写方法J-UNIWARD和SI-UNIWARD几乎不改变文件大小。
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引用次数: 1
Adaptive Model-Free Control of Electrically Driven Robot Manipulators 电动机械臂的自适应无模型控制
Pub Date : 2019-04-01 DOI: 10.1109/IranianCEE.2019.8786502
A. Saleki, M. Fateh
This paper presents a Model-Free approach for robot manipulators control. The control signal in this approach is the motors' voltage, and can be directly used. For each of the manipulator joints, a local model is considered, which is based on the manipulator's input and output, and each joint is controlled independently. The only information needed for implementation of this method is the motors' voltage and the position of the joints, which are both easily measurable. In this approach, all system dynamics and external disturbances are considered as an unknown term, that is estimated using an adaptive law obtained from the Lyapunov theory. The designed control law is simple, and controller stability is guaranteed by using this theory. Simulation results and comparison verify the effectiveness of the proposed approach.
提出了一种无模型的机器人操纵臂控制方法。这种方法的控制信号是电机的电压,可以直接使用。对于每个机械手关节,考虑一个基于机械手输入和输出的局部模型,并且每个关节都是独立控制的。实现这种方法所需的唯一信息是电机的电压和关节的位置,这两者都很容易测量。在这种方法中,所有系统动力学和外部干扰都被认为是一个未知项,使用从李亚普诺夫理论中获得的自适应律来估计。设计的控制律简单,保证了控制器的稳定性。仿真和对比结果验证了该方法的有效性。
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引用次数: 1
Defense Against Intelligent Jammer in Cognitive Wireless Networks 认知无线网络中的智能干扰防御
Pub Date : 2019-04-01 DOI: 10.1109/IranianCEE.2019.8786562
Hossein Noori, Saeed Sadeghi Vilni
Wireless channels became very crowd by severe increasing in number of wireless communication instruments. Utilizing interference of users transmitting on the same channel, an intelligent jammer can cause more harmful attacks to the transmission of a special user. In this paper, defense against an intelligent jammer is considered. We assume that the attacker can utilize the interference of other users in addition to its interference to jam a special user. A single controller stochastic game is proposed to model the interactions between special user and the jammer. Using simplex algorithm, we obtained the optimal strategies. Finally, simulation results show that the proposed approach leads to better performance.
随着无线通信设备数量的急剧增加,无线信道变得非常拥挤。智能干扰机利用用户在同一信道上传输的干扰,对特定用户的传输造成更多的有害攻击。本文研究了对智能干扰机的防御问题。我们假设攻击者除了利用自身的干扰外,还可以利用其他用户的干扰来干扰某个特殊用户。提出了一种单控制器随机对策来模拟特殊用户与干扰机之间的交互。采用单纯形算法,得到了最优策略。仿真结果表明,该方法具有较好的性能。
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引用次数: 3
Sub-threshold MOS Translinear Principle Based-Analog Cell Suitable for Current-Mode Signal Processing 适合于电流模式信号处理的亚阈值MOS跨线性原理模拟单元
Pub Date : 2019-04-01 DOI: 10.1109/IranianCEE.2019.8786399
Mohammad Moradinezhad Maryan, Reza Rezaei Siahrood, Hamed Sajadinia, S. J. Azhari
A new low-voltage current-mode multifunction cell for analog signal processing, is presented in this paper. The proposed cell is based on sub-threshold MOS translinear (MTL) principle and consists of six matched NMOS transistors. Square-rooting, exponential and logarithmic functions are computational current-mode circuits that are designed using the proposed cell. The designed functions are simulated by HSPICE simulator in TSMC 0.18 µm (level-49 parameters) CMOS technology. Post-layout simulation results plus Monte Carlo analysis verified the functionality and superiority of the proposed circuits. Simulation results of the current-mode square-rooting circuit with 1-V DC supply voltage show that the maximum nonlinearity as 2.8%, the −3dB bandwidth as 32.95 MHz and the maximum power consumption as 520 nW.
介绍了一种用于模拟信号处理的新型低压电流型多功能电池。该单元基于亚阈值MOS translinear (MTL)原理,由6个匹配的NMOS晶体管组成。平方根,指数和对数函数是使用所提出的单元设计的计算电流模式电路。采用台积电0.18µm(49级参数)CMOS技术,采用HSPICE模拟器对设计的功能进行了仿真。布置图后的仿真结果和蒙特卡罗分析验证了所提出电路的功能和优越性。对直流电源电压为1 v的电流型平方根电路的仿真结果表明,最大非线性为2.8%,−3dB带宽为32.95 MHz,最大功耗为520 nW。
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引用次数: 2
Voltage sag Assessment Considering Low Voltage Ride-Through Requirement for Wind Turbines Based on SARFI Index 基于SARFI指数的考虑低电压穿越要求的风电机组电压凹陷评估
Pub Date : 2019-04-01 DOI: 10.1109/IranianCEE.2019.8786769
Sina Shakeri, S. Esmaeili, Mohammad Hossein Rezaeian Koochi
This paper defines a system average root mean square variation frequency (SARFI) index based on the area of vulnerability (AOV) and proposes a systematic method for determining accurate AOVs for fault induced voltage sags. The SARFI index specifies the number of voltage sags experiencing at a given area or in a given system per year more severe than the curve limits. The SARFI index is helpful in establishing efficient planning for mitigation of voltage sags. This paper also assesses voltage sags considering low voltage ride-through (LVRT) requirements for wind turbines. The determination of AOVs is very important for assessing voltage sags performance, since voltage sags can be caused by faults occurring in different parts of a power system. In this paper, the procedure of determining AOVs for balanced faults are considered. The proposed methodology is applied on the IEEE 30-bus test system integrated with eight wind turbines.
本文定义了基于脆弱性面积(AOV)的系统平均均方根变异频率(SARFI)指标,并提出了一种确定故障电压跌落脆弱性面积的系统方法。SARFI指数指定了在给定区域或给定系统中每年经历的比曲线限制更严重的电压下降的数量。SARFI指数有助于建立有效的电压跌落缓解计划。本文还考虑了风电机组的低电压穿越(LVRT)要求,对电压跌落进行了评估。电压跌落的确定对于评估电压跌落性能非常重要,因为电压跌落可能是由电力系统不同部分发生的故障引起的。本文考虑了平衡故障的aov的确定过程。将该方法应用于集成了8台风力发电机的IEEE 30总线测试系统。
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引用次数: 6
Design and Analysis of an SOI Photonic Filter Based on a Microring 基于微环的SOI光子滤波器的设计与分析
Pub Date : 2019-04-01 DOI: 10.1109/IranianCEE.2019.8786445
Ali Kazemi Nasaban Shotorban, K. Abedi, Kian Jafari
In this paper, we present an SOI compact photonic filter which consists of a partial microring located inside or outside a microring resonator. The partial microring affects the behavior of the resonator and results in a change in the wavelength response of the device. A change in size or location of the partial microring causes a noticeable alteration in the wavelength response of the resonator. By using this method, we cause a shift of 1.8 nm in the central wavelength of the output resonance, while maintaining a high transmittance, without changing the footprint of the device.
本文提出了一种由微环谐振腔内外部分微环组成的SOI紧凑型光子滤波器。部分微环影响谐振器的行为,并导致器件波长响应的变化。局部微环的大小或位置的变化会引起谐振器波长响应的明显变化。通过这种方法,我们使输出共振的中心波长偏移1.8 nm,同时保持高透射率,而不改变器件的占地面积。
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引用次数: 0
Mitigating Sub-Synchronous Resonance Using Static Var Compensator (SVC) Enhanced with Adaptive Neuro-Fuzzy Inference Systems (ANFIS) Controller 利用自适应神经模糊推理系统(ANFIS)控制器增强静态无功补偿器(SVC)缓解次同步共振
Pub Date : 2019-04-01 DOI: 10.1109/IranianCEE.2019.8786701
M. Amirian
Nowadays renewable energy sources, particularly wind power, are considered as important generation in electric power systems because of their no exhausted nature and benign environmental effects. With increasing usage wind power in power systems, impact of wind generator on sub-synchronous resonance (SSR) is going to more important. The main purpose of this paper is to confirm the ability of the Static Var Compensator (SVC) as a member of FACTS family in mitigating the SSR. Imperialist competitive algorithm (ICA)-based Conventional Damping Controller (CDC) and Adaptive Neuro-Fuzzy Inference Systems (ANFIS) are designed as two novel controllers In order to provide the effective damping of SSR. The system stability is studied through time domain simulations, Fast Fourier Transform (FFT) analysis and a Performance Index (PI) which is defined based on the dynamics of the power system. To compare the performance of two controllers, two various cases of study are considered.
目前,可再生能源,特别是风力发电,由于其不枯竭的特性和良好的环境效应,被认为是电力系统中的重要发电方式。随着风电在电力系统中的应用日益增加,风力发电机组对次同步谐振的影响越来越重要。本文的主要目的是确认静态无功补偿器(SVC)作为FACTS家族的一员在减轻SSR的能力。为了给SSR系统提供有效的阻尼,设计了基于帝国主义竞争算法(ICA)的传统阻尼控制器(CDC)和自适应神经模糊推理系统(ANFIS)。通过时域仿真、快速傅立叶变换(FFT)分析和基于电力系统动态特性定义的性能指标(PI)来研究系统的稳定性。为了比较两个控制器的性能,考虑了两个不同的研究案例。
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引用次数: 6
Robust stability for affine T-S fuzzy impulsive control systems subject to parametric uncertainties 参数不确定仿射T-S模糊脉冲控制系统的鲁棒稳定性
Pub Date : 2019-04-01 DOI: 10.1109/IranianCEE.2019.8786425
I. Zamani, A. H. Amiri Mehra, Z. Abbasi, M. Shafiee
The main objective of this paper is to investigate the robust stability problem of affine fuzzy impulsive control systems in which the system is presented by affine Takagi-Sugeno fuzzy model. By using extended Lyapunov stability theory, some matrix inequalities conditions are derived to guarantee the stability of affine Takagi-Sugeno fuzzy impulsive control systems subject to parametric uncertainties. A numerical example is given to confirm the analytical results and illustrate the effectiveness of the proposed strategy.
本文的主要目的是研究用仿射Takagi-Sugeno模糊模型表示的仿射模糊脉冲控制系统的鲁棒稳定性问题。利用扩展Lyapunov稳定性理论,导出了具有参数不确定性的仿射Takagi-Sugeno模糊脉冲控制系统稳定性的若干矩阵不等式条件。通过数值算例验证了分析结果,说明了所提策略的有效性。
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引用次数: 3
期刊
2019 27th Iranian Conference on Electrical Engineering (ICEE)
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