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2015 9th International Conference on Telecommunication Systems Services and Applications (TSSA)最新文献

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Link failure analysis in SDN datacenter using RipL-POX controller 基于RipL-POX控制器的SDN数据中心链路故障分析
Iffah Kholidatun Nisrina, A. Aginsa, Elsa Vinietta, N. Syambas
In a SDN-based data center network, the controller used greatly affects the behavior of the network. In this paper, the observation is conducted to describe the effect of various link failure scenarios to data center network performance using the Ripl-POX controller. Results shown in this paper can be used as a consideration for both controller selection or building for managing the data center and switch replacement method selection. This paper shows the effect of one to three switches that is turned down simultaneously on overall bandwidth. The simulation is done on 4k-fat tree data center network on mininet environment with RipL-POX as controller.
在基于sdn的数据中心网络中,所使用的控制器对网络的性能影响很大。本文利用ripple - pox控制器,观察了各种链路故障场景对数据中心网络性能的影响。本文的研究结果可作为数据中心控制器选择或管理结构选择和交换机更换方法选择的参考。本文展示了同时关闭一到三个开关对总带宽的影响。以RipL-POX为控制器,在最小网络环境下对4k-fat树数据中心网络进行了仿真。
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引用次数: 0
Outage probability analysis for optical inter-platform HAPS-Link over log normal turbulence channels 日志正常湍流通道上光学平台间HAPS-Link的中断概率分析
H. Akbar, Iskandar
In this paper, the outage probability performance of optical inter-platform link is analyzed. Atmospheric turbulence is one of the main impairment affecting the operation of optical inter platform link. An inter-HAP channel was modeled as a random process with log normal distribution. The outage probability expression is theoretically derived and numerical results are presented. The results illustrate the outage probability dependence on the power margin, turbulence strength, and propagation path length.
本文分析了光平台间链路的中断概率性能。大气湍流是影响光学平台间链路运行的主要障碍之一。将hap间信道建模为具有对数正态分布的随机过程。从理论上推导了停运概率表达式,并给出了数值结果。结果表明,中断概率与功率裕度、湍流强度和传播路径长度有关。
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引用次数: 3
On comparison of multigrid cycles for poisson solver in polar plane coordinates 极平面泊松求解器的多网格循环比较
Nurhayati Masthurah, Iftitahu Ni'mah, Furqon H. Muttaqien, Rifki Sadikin
Fast Multigrid Poisson solvers have been considered essential for developing efficient numerical method solutions in diverse fields. In this paper, we compare fast and simple multigrid methods: V-Cycle, W-Cycle, and F-Cycle to solve Poisson Equation (PE) in polar plane coordinates. The solver is analysed toward different 2n + 1 grid sizes to evaluate its convergence properties, i.e. precision and accuracy, as compared to reference problem of cylindrical annulus. Each multigrid cycle is evaluated based on computation time, convergence error, and relative error. The results show that W-Cycle (γ = 4) gives more optimized solution as Poisson solver in comparison with the other multigrid methods.
快速多网格泊松解被认为是在许多领域开发高效数值方法解的必要条件。本文比较了V-Cycle、W-Cycle和F-Cycle三种快速和简单的多重网格方法在极平面上求解泊松方程(PE)。分析了求解器在不同2n + 1网格尺寸下的收敛性,即精度和精度,并与圆柱环空参考问题进行了比较。根据计算时间、收敛误差和相对误差对每个多网格循环进行评估。结果表明,W-Cycle (γ = 4)作为泊松求解器,与其他多重网格方法相比,得到了更优的解。
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引用次数: 1
EEG data transmission over speech channel in the telephony system 电话系统中基于语音信道的脑电图数据传输
H. Setiawan, Yusuf A. Amrulloh, Erlina Marfianti
In this paper we present the most implementable scheme for transmitting 19 channels electroencephalography (EEG) and speech signals simultaneously using a speech channel of telephony system. The proposed system works based on re-sampling, multiplexing and filtering concepts. Re-sampling is applied to adjust EEG sampling frequency such that appropriate with speech signal sampling frequency. The 19 channels are time multiplexed then mixed with the speech to produce a transmitting signal. In the receiver side, speech and EEG are separated by filtering. Based on simulation result in the noise environment, the proposed system has successfully separated the speech and the EEG signals. The correlation coefficient between the received signals after separation and the original ones are more than 0.8 for EEG and more than 0.7 for speech in 30 dB SNR. Moreover, the proposed system has high possibility to be implemented with low computational complexity.
本文提出了利用电话系统的语音信道同时传输19路脑电图和语音信号的最可行方案。该系统的工作原理基于重采样、复用和滤波概念。采用重采样的方法调整脑电信号的采样频率,使其与语音信号的采样频率相适应。将这19个信道进行时间复用,然后与语音混合以产生发射信号。在接收端,通过滤波将语音和脑电信号分离。基于噪声环境下的仿真结果,该系统成功地分离了语音和脑电信号。在30 dB信噪比下,分离后的接收信号与原始信号的相关系数大于0.8,与原始信号的相关系数大于0.7。此外,该系统具有较高的实现可能性和较低的计算复杂度。
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引用次数: 0
Coverage and capacity trade-off using admission and power controlled CDMA system for wireless internet services in rural environments 在农村环境中使用准入和功率控制CDMA系统进行无线互联网服务的覆盖和容量权衡
A. Kurniawan, I. Zakia, E. Wartika, A. G. Austin
In this paper the coverage and capacity of CDMA system is evaluated using admission and power control to serve for low to medium speed internet services, such as digital TV or film/video streaming in rural areas. One of the unique characteristics of CDMA system is that it is possible to trade off between capacity and its coverage, called the cell-breathing. Open loop and closed loop power control can be used to increase the capacity of CDMA system; while admission control can be applied to trade-off between its capacity and the coverage. Computer simulation was conducted to evaluate the power control performance in Rayleigh fading channel. Then semi-analytical evaluation was performed to obtain the coverage-capacity trade-off. The result shows that the capacity of CDMA systems increases when power control was employed. Numerical and semi analytical evaluation show that CDMA coverage and capacity can be traded-off to meet various demand of traffic capacity and cell coverage in rural environments.
本文利用准入和功率控制对CDMA系统的覆盖和容量进行了评估,以服务于农村地区的低到中速互联网服务,如数字电视或电影/视频流。CDMA系统的一个独特的特点是,它可以在容量和覆盖范围之间进行权衡,称为蜂窝呼吸。开环和闭环功率控制可以增加CDMA系统的容量;而准入控制可以应用于其容量和覆盖范围之间的权衡。通过计算机仿真,对瑞利衰落信道下的功率控制性能进行了评价。然后进行半解析评估,以获得覆盖率-容量的权衡。结果表明,采用功率控制可以提高CDMA系统的容量。数值和半解析评估表明,在农村环境下,CDMA覆盖和容量可以进行权衡,以满足不同的通信容量和小区覆盖需求。
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引用次数: 1
Non-intrusive load monitoring using Bluetooth low energy 采用蓝牙低功耗的非侵入式负载监控
T. Juhana, A. Irawan
The energy consumption in residential has been increasing over the past years. Many researches about energy saving which uses information and communication technology have been presented to conserve electrical consumption. Providing residents with information on their energy consumption has become a feasible option to promote energy saving in residential sector. In this paper, a home energy monitoring system using Bluetooth Low Energy (BLE) and sensor non-invasive, is described. The authors designed a system based on BLE and non-invasive sensor so monitoring process of electrical parameter such as voltage RMS, current RMS, real power, apparent power and power factor is realized.
近年来,住宅能耗不断增加。许多利用信息通信技术的节能研究已经提出,以节约电力消耗。向居民提供其能源消耗信息已成为促进住宅节能的可行选择。本文介绍了一种采用蓝牙低功耗(BLE)和传感器的无创家庭能量监测系统。设计了一种基于BLE和非侵入式传感器的系统,实现了对电压有效值、电流有效值、实际功率、视在功率、功率因数等电气参数的监测过程。
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引用次数: 7
Analysis of camera array on board data handling using FPGA for nano-satellite application 基于FPGA的相机阵列机载数据处理在纳米卫星中的应用分析
Whildan Pakartipangi, Denny Darlis, Budi Syihabuddin, H. Wijanto, A. D. Prasetyo
Nanosatellite has limited functions because of the mass constraint from 1 to 10 kg. Therefore, the requirement of low cost, low mass, low dimension, and low power consumption must be fulfilled in designing and choosing the component of nanosatellite. To obtain wider coverage area while maintaining the low dimension, camera array was used to produce image with wider area. In this research, On Board Data Handling (OBDH) implemented in FPGA used below 100% of the total FPGA resource. LUT-FF pairs was the most used resource with 75% of usage. OBDH also combined the image from each camera to get image with wider area. The FPGA and 4 cameras used 2264.44 milliwatt of power consumption, higher than the remote sensing system of SNAP-1 nanosatellite which used 1 milliwatt of power consumption.
纳米卫星受1 ~ 10公斤的质量限制,功能有限。因此,在设计和选择纳米卫星部件时,必须满足低成本、低质量、低尺寸和低功耗的要求。为了在保持低维数的情况下获得更大的覆盖面积,采用相机阵列产生更大面积的图像。在本研究中,在FPGA中实现的板上数据处理(OBDH)使用的FPGA总资源低于100%。LUT-FF对是最常用的资源,使用率为75%。OBDH还将每台摄像机的图像进行合并,得到面积更大的图像。FPGA和4个摄像头的功耗为2264.44毫瓦,高于SNAP-1纳米卫星遥感系统的1毫瓦功耗。
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引用次数: 5
Smart home platform based on optimized wireless sensor network protocol and scalable architecture 基于优化无线传感器网络协议和可扩展架构的智能家居平台
T. Adiono, Rachmad Vidya Wicaksana Putra, Maulana Yusuf Fathany, M. A. Wibisono, W. Adijarto
In this paper, we propose a smart home platform based on optimized wireless sensor network (WSN) protocol and scalable architecture. In this platform, system environment is divided into two main environments, indoor and outdoor. Outdoor environment uses internet-cloud system, while indoor environment uses WSN system. This scheme is also well known as Internet-of-Things (IoT) concept. Those two environments are connected to each other by using access point bridge. WSN system is established from efficient and scalable WSN components. Each component of WSN is designed to use an optimized protocol. WSN components are connected to each other in mesh topology in order to provide scalable architecture for further extension and changes. For outdoor environment, the existing internet-cloud system is used as infrastructure. Thus, this smart home platform can be monitored and controlled from smart phone, anytime and anywhere, as long as mobile data access is provided. For databasing implementation, SQLite database system is chosen because of its low cost and easy configuration. For system evaluation, several tests have been conducted to deliver the profile of proposed system.
本文提出了一种基于优化无线传感器网络协议和可扩展架构的智能家居平台。在本平台中,系统环境分为室内和室外两个主要环境。室外环境采用互联网云系统,室内环境采用WSN系统。这种方案也被称为物联网(IoT)概念。这两个环境通过接入点网桥相互连接。无线传感器网络系统由高效、可扩展的无线传感器网络组件组成。无线传感器网络的每个组件都设计为使用优化的协议。WSN组件以网状拓扑结构相互连接,以便为进一步扩展和更改提供可扩展的体系结构。对于室外环境,使用现有的互联网云系统作为基础设施。因此,只要提供移动数据接入,就可以随时随地通过智能手机对这个智能家居平台进行监控。在数据库实现方面,由于SQLite数据库系统成本低、配置简单,因此选择SQLite数据库系统。为了进行系统评估,进行了几项测试,以提供拟议系统的概要。
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引用次数: 9
A high availability (HA) MariaDB Galera Cluster across data center with optimized WRR scheduling algorithm of LVS - TUN 采用LVS - TUN优化WRR调度算法的跨数据中心的高可用性MariaDB Galera集群
Bagus Aditya, T. Juhana
Data availability and reliability is very important along with the growth of information and communication technology services today. Needs of the powerful and affordable database system infrastructure to be the most considered thing by the application service provider. This paper presents the powerful and scalable database open source solution infrastructure which can be distributed across the data center in the world to provide any application or content services. Database infrastructure in this paper using MariaDB Galera Cluster which geographically distributed across data center and Linux Virtual Server (LVS)-Tunnel with optimized weighted round robin algorithm as the load balancer. Optimization in this weighted round robin algorithm are focused on assignment value of weight, based on the condition of database server status. The condition include total active thread (active connected client) and Query per Second Average.
随着当今信息和通信技术服务的发展,数据的可用性和可靠性变得非常重要。功能强大且价格合理的数据库系统基础设施的需求是应用程序服务提供商最需要考虑的事情。本文提出了一种强大的、可扩展的数据库开源解决方案基础架构,它可以分布在世界各地的数据中心,提供任何应用程序或内容服务。本文的数据库基础设施采用地理分布在数据中心的MariaDB Galera集群和Linux虚拟服务器(LVS)-Tunnel,采用优化的加权轮询算法作为负载均衡器。该算法的优化主要集中在基于数据库服务器状态的权值分配上。条件包括活动线程总数(活动连接的客户端)和每秒平均查询数。
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引用次数: 10
PTS-based PAPR reduction in fixed WiMAX system with Grouping Phase Weighting (GPW) 分组相位加权(GPW)下基于pts的固定WiMAX系统PAPR降低
Chaeriah Bin Ali Wael, N. Armi, B. Rohman
WiMAX is a wireless technology that was developed to overcome the limitations of wireline networks to meet the needs of Broadband Wireless Access (BWA) services to customers. As standardized, fixed WiMAX uses OFDM as its physical air interface. Therefore, it also suffers from high PAPR. To solve this problem, Partial Transmit Sequence (PTS) is used in this paper due to its better performance among other PAPR reduction techniques. Unfortunately, in conventional PTS, an exhaustive search over all combinations of allowed phase weighting factors is needed. This process leads to high computational complexity. Hence, Grouping Phase Weighting (GPW) is used to simplify search complexity and still maintain to provide effective PAPR reduction as conventional PTS. The simulation is conducted to IEEE 802.16d system with various mandatory modulation types and channel coding rates. The derived results show that the choice of modulation type does not give significant effect on the PAPR reduction. The higher channel coding rate gives higher PAPR reduction.
WiMAX是一种无线技术,是为了克服有线网络的局限性,满足客户宽带无线接入(BWA)服务的需要而开发的。作为标准,固定WiMAX使用OFDM作为其物理空中接口。因此,它也有很高的PAPR。为了解决这个问题,本文采用了部分传输序列(PTS),因为它在其他PAPR降低技术中具有更好的性能。不幸的是,在传统的PTS中,需要对允许的相位加权因子的所有组合进行详尽的搜索。这个过程导致了很高的计算复杂度。因此,使用分组阶段加权(GPW)来简化搜索复杂度,同时保持与传统PTS一样有效地降低PAPR。对具有不同强制调制类型和信道编码速率的IEEE 802.16d系统进行了仿真。推导结果表明,调制类型的选择对PAPR的降低没有显著影响。信道编码率越高,PAPR降低越高。
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引用次数: 4
期刊
2015 9th International Conference on Telecommunication Systems Services and Applications (TSSA)
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