2014 IEEE Colombian Conference on Communications and Computing (COLCOM)最新文献_第2页

Capacity analysis for distributed spectrum brokers in heterogeneous networks 异构网络中分布式频谱代理的容量分析

2014 IEEE Colombian Conference on Communications and Computing (COLCOM) Pub Date : 2014-06-04 DOI: 10.1109/COLCOMCON.2014.6860429

R. Hincapié, L. B. Agudelo, Cristina Gómez, Alexander Galvis Quintero, Robert Miller

引用次数: 0

Test methodology for impedance characterization of a low voltage power line channel for broadband communication applications 宽带通信用低压电力线信道阻抗特性的试验方法

2014 IEEE Colombian Conference on Communications and Computing (COLCOM) Pub Date : 2014-06-04 DOI: 10.1109/COLCOMCON.2014.6860407

Saitel Daniela Agudelo Sanabria, Vladimir Ricardo Pineda Bonilla, Juan Miguel David Becerra Tobar

{"title":"Test methodology for impedance characterization of a low voltage power line channel for broadband communication applications","authors":"Saitel Daniela Agudelo Sanabria, Vladimir Ricardo Pineda Bonilla, Juan Miguel David Becerra Tobar","doi":"10.1109/COLCOMCON.2014.6860407","DOIUrl":"https://doi.org/10.1109/COLCOMCON.2014.6860407","url":null,"abstract":"Impedance characterization is one of the most important measurements required for the correct design, construction and performance of couplers, modems and many others common devices in the communications area. It is also important for the correct estimation and calculation of the incidence of certain factors in the development of research about power lines. Previous research about power line communications (PLC) have shown that the line behavior changes according to the frequency, wiring practice, topology and loads plugged in, among other factors. The variable behavior of the low voltage power line makes it a harsh environment when it is used as a channel for communication applications. Characterization is an important issue because the knowledge of the conditions that regulate the performance of the line is a useful tool to provide solutions and get significant improvements. This paper presents a general test methodology suitable to measure the line impedance for a wide frequency spectrum. The proposed method can be applied to different deployed power networks. The results obtained for a specific line are shown as an example of its application in a real-life environment.","PeriodicalId":346697,"journal":{"name":"2014 IEEE Colombian Conference on Communications and Computing (COLCOM)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122623086","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Simulation in an SDN network scenario using the POX Controller 使用POX控制器在SDN网络场景中进行仿真

2014 IEEE Colombian Conference on Communications and Computing (COLCOM) Pub Date : 2014-06-04 DOI: 10.1109/COLCOMCON.2014.6860403

Ligia Rodrigues Prete, C. M. Schweitzer, A. Shinoda, Rogerio Leao Santos de Oliveira

{"title":"Simulation in an SDN network scenario using the POX Controller","authors":"Ligia Rodrigues Prete, C. M. Schweitzer, A. Shinoda, Rogerio Leao Santos de Oliveira","doi":"10.1109/COLCOMCON.2014.6860403","DOIUrl":"https://doi.org/10.1109/COLCOMCON.2014.6860403","url":null,"abstract":"Computer networks have evolved due to new trends in the society's needs since their emergence as a way of providing remote access and sharing of computational resources. The architecture inflexibility of the computer networks presents a challenge for researchers, since their experiments can hardly be evaluated in real networks. Thus, in general, tests of new technologies are conducted on network simulators, which imply in a streamline of the reality. The paradigm of Software Defined Networks (SDN) and OpenFlow architecture, offer a way for the implementation of a programmable network architecture, able to be implemented gradually in production networks, which offers the possibility of separating the control mechanisms of the many traffic flows served, so that a scientific experiment can be performed in a real network (adapted for SDN) without interfering with its operation. This paper contextualizes the existing problems in current computer networks, and presents the SDN network as one of the main proposals for the viability of the Internet of the Future. In this context, it is discussed the OpenFlow architecture, which allows the creation of applications for Software Defined Networks. Finally it is presented the network simulator SDN, the Mininet, which implements the OpenFlow interface in a network simulation scenario containing a controller POX with two components, one OpenFlow switch and three nodes. The main objective was to evaluate the communication and bandwidth between nodes.","PeriodicalId":346697,"journal":{"name":"2014 IEEE Colombian Conference on Communications and Computing (COLCOM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129305739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 52

Analysis of propagation model in conformance with IEEE 802.16-2009-based fixed wireless networks 基于IEEE 802.16-2009的固定无线网络传播模型分析

2014 IEEE Colombian Conference on Communications and Computing (COLCOM) Pub Date : 2014-06-04 DOI: 10.1109/COLCOMCON.2014.6860397

Jaime Jarrin, P. Bernal, R. Lara-Cueva

引用次数: 2

OSA: A VANET application focused in energy efficiency OSA:一个专注于能源效率的VANET应用程序

2014 IEEE Colombian Conference on Communications and Computing (COLCOM) Pub Date : 2014-06-04 DOI: 10.1109/COLCOMCON.2014.6860398

O. Orozco, Gonzalo Llano Ramírez

引用次数: 4

Energy profile for environmental monitoring wireless sensor networks 环境监测无线传感器网络的能量分布

2014 IEEE Colombian Conference on Communications and Computing (COLCOM) Pub Date : 2014-06-04 DOI: 10.1109/COLCOMCON.2014.6860416

M. Navarro, Yimei Li, Yao Liang

引用次数: 10

A methodological approach to apply security tactics in software architecture design 一种在软件架构设计中应用安全策略的方法

2014 IEEE Colombian Conference on Communications and Computing (COLCOM) Pub Date : 2014-06-04 DOI: 10.1109/COLCOMCON.2014.6860432

G. Pedraza-Garcia, H. Astudillo, D. Correal

引用次数: 16

Improvement in read range of an UHF RFID newborn hospital monitoring system using meander line antennas 弯曲线天线对超高频RFID新生儿医院监测系统读取范围的改进

2014 IEEE Colombian Conference on Communications and Computing (COLCOM) Pub Date : 2014-06-04 DOI: 10.1109/COLCOMCON.2014.6860415

L. F. Lagunes-Aranda, Luis E. Carrion-Rivera, G. Zamora-Mejía, Ruben A. Gonzalez-Benitez, A. G. Martinez-Lopez, J. Martínez-Castillo

{"title":"Improvement in read range of an UHF RFID newborn hospital monitoring system using meander line antennas","authors":"L. F. Lagunes-Aranda, Luis E. Carrion-Rivera, G. Zamora-Mejía, Ruben A. Gonzalez-Benitez, A. G. Martinez-Lopez, J. Martínez-Castillo","doi":"10.1109/COLCOMCON.2014.6860415","DOIUrl":"https://doi.org/10.1109/COLCOMCON.2014.6860415","url":null,"abstract":"Theft and exchange of newborns have rise its numbers becoming this topic a big issue that must be face up by hospitals. Closed Circuit Television (CCTV) surveillance is one of the most used solutions. However, CCTV needs human operator and a highly implementation cost. Ultra High Frequency Radio IDentification (UHF RFID) brings an easy and cheap solution to this problematic because of automatic real time control and monitoring of passive elements called tags. This work presents the design of two UHF RFID meander line antennas for newborn hospital monitoring applications. The first antenna is implemented on printed circuit board (PCB) obtaining a read range of 8.25m, a read range improvement of 2.25m is observed compared with commercially available passive systems. The second antenna is fabricated on Rogers Duroid 5880 flexible substrate allowing adhesion to any surface shape, a read range of 6m is obtained. Comercially available system used as reference is composed by a reader CSL 461 and passive tag Confidex Carrier. In order to illustrate this improvement, a monitoring system layout prototype is proposed.","PeriodicalId":346697,"journal":{"name":"2014 IEEE Colombian Conference on Communications and Computing (COLCOM)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132844376","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Approach for a Congestion Charges System supported on Internet of Things 基于物联网的交通拥堵收费系统研究

2014 IEEE Colombian Conference on Communications and Computing (COLCOM) Pub Date : 2014-06-04 DOI: 10.1109/COLCOMCON.2014.6860424

Jesse Padilla Agudelo, H. C. Castro Barrera

引用次数: 4

Methodology of LC-SLM for filtering and phase spectral recovering of GVD and SPM in the ultra-short pulse propagation through single-mode fiber 超短脉冲单模光纤传输中GVD和SPM的LC-SLM滤波和相位谱恢复方法

2014 IEEE Colombian Conference on Communications and Computing (COLCOM) Pub Date : 2014-06-04 DOI: 10.1109/COLCOMCON.2014.6860409

Jesus E. Madronero, A. Cárdenas, J. Botía

{"title":"Methodology of LC-SLM for filtering and phase spectral recovering of GVD and SPM in the ultra-short pulse propagation through single-mode fiber","authors":"Jesus E. Madronero, A. Cárdenas, J. Botía","doi":"10.1109/COLCOMCON.2014.6860409","DOIUrl":"https://doi.org/10.1109/COLCOMCON.2014.6860409","url":null,"abstract":"The performance of ultra-short pulse propagation through single-mode fiber (SMF) is degraded due to linear and nonlinear phenomena like fiber loss, group velocity dispersion (GVD), and self-phase modulation (SPM). Since diffraction phenomena and transmittance functions of the optical devices affect the magnitude and phase of a propagated ultra-short pulse, it is necessary to build-up an approach in order to optimize such limitations. In the paper, a simulation of Gaussian pulse propagation through SMF and 2-f line spatial configuration is presented. The effects of GVD and SPM are generated by split-step Fourier method (SSFM) to solve the nonlinear Schrodinger equation (NLSE). For the spatial configuration, Fresnel's approximation and the transmittance functions for optical elements such as gratings and lens are considered. To manipulate and recover spectral phases of the ultra-short pulse, an approach applied over a liquid crystal spatial light modulator (LC-SLM) as a phase modulator and spectral filter is proposed. The preliminary results show that the ultra-short pulse propagation in SMF is affected in presence of GVD and SPM just at the same time. In the second simulation, the interaction for a propagated ultra-short pulse through a 2f-line spatial configuration is described. The input spectral phases were manipulated by a LC-SLM at the Fourier's plane, obtaining a flat phase. In the third simulation, the spectral components from a pulse were filtered by fixed masks, implemented on the LC-SLM as a low-pass and band-pass filter, respectively.","PeriodicalId":346697,"journal":{"name":"2014 IEEE Colombian Conference on Communications and Computing (COLCOM)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129710397","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0