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Evaluation of improvement proposals for Border Gateway Protocol (BGP) 边界网关协议(BGP)改进方案评估
2012 IEEE Colombian Communications Conference (COLCOM) Pub Date : 2012-05-16 DOI: 10.1109/COLCOMCON.2012.6233645
Jackson Reina Alzate, Roberto Carlos Hincapié Reyes
{"title":"Evaluation of improvement proposals for Border Gateway Protocol (BGP)","authors":"Jackson Reina Alzate, Roberto Carlos Hincapié Reyes","doi":"10.1109/COLCOMCON.2012.6233645","DOIUrl":"https://doi.org/10.1109/COLCOMCON.2012.6233645","url":null,"abstract":"In a network running the Border Gateway Protocol (BGP), the end-to-end reachability can be temporarily disrupted due to link failures and the time required for the network to converge could lead to service degradation or even interruption, which is critical especially for real-time interactive applications. The path-exploration process and the duration of the minimal route advertisement interval (MinRouteAdver) have a significant influence on the convergence time and in recent years several proposals have been made in order to reduce the convergence time. In this paper, we evaluate the behavior of some of these proposals, such as ghost-flushing or EPIC, in medium to large Waxman topology networks with nodes ranging 50 and 400 nodes.","PeriodicalId":412983,"journal":{"name":"2012 IEEE Colombian Communications Conference (COLCOM)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122296317","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: 5
Protocol for evaluation of suitability of the copper twisted-pair access network for the IPTV service 用于IPTV业务的铜绞线接入网适用性评估的协议
2012 IEEE Colombian Communications Conference (COLCOM) Pub Date : 2012-05-16 DOI: 10.1109/COLCOMCON.2012.6233662
O. Caicedo, M. M. Sánchez, A. Pachón
{"title":"Protocol for evaluation of suitability of the copper twisted-pair access network for the IPTV service","authors":"O. Caicedo, M. M. Sánchez, A. Pachón","doi":"10.1109/COLCOMCON.2012.6233662","DOIUrl":"https://doi.org/10.1109/COLCOMCON.2012.6233662","url":null,"abstract":"With the development of different broadband technologies in access, there is the greatest technological breakthrough that allows providing various services through it (convergence). Appear and telecom operators currently providing voice and data services by the traditional copper pair, and wishing to provide services such as IPTV, but have limited ability to transfer data in access. This technical limitation requires assessing the access network as a prerequisite and essential for the provision of a service through a process, a verification of the parameters versus standards and / or vendor specifications and measurement technology, for this reason it has decided address this important issue in this work. For the operator from a technical perspective, marketing and service support is of utmost importance to have the assurance that the service will be deployed and supported within the operating parameters suggested by the standards and providers.","PeriodicalId":412983,"journal":{"name":"2012 IEEE Colombian Communications Conference (COLCOM)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127712946","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
Trends in services for Living Labs in Colombia 哥伦比亚生活实验室的服务趋势
2012 IEEE Colombian Communications Conference (COLCOM) Pub Date : 2012-05-16 DOI: 10.1109/COLCOMCON.2012.6233682
L. S. Munar, Z. Solarte
{"title":"Trends in services for Living Labs in Colombia","authors":"L. S. Munar, Z. Solarte","doi":"10.1109/COLCOMCON.2012.6233682","DOIUrl":"https://doi.org/10.1109/COLCOMCON.2012.6233682","url":null,"abstract":"The following paper presents trends in Living Labs services, and some parameters for the evaluation of these services. In the end it shows some Living Labs in Colombia, and how services are defined in the living lab of Urb@nalabproject.","PeriodicalId":412983,"journal":{"name":"2012 IEEE Colombian Communications Conference (COLCOM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131084719","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
Applications of WSN in health and agriculture 无线传感器网络在卫生和农业中的应用
2012 IEEE Colombian Communications Conference (COLCOM) Pub Date : 2012-05-16 DOI: 10.1109/COLCOMCON.2012.6233678
A. F. Murillo, M. Peña, D. Martínez
{"title":"Applications of WSN in health and agriculture","authors":"A. F. Murillo, M. Peña, D. Martínez","doi":"10.1109/COLCOMCON.2012.6233678","DOIUrl":"https://doi.org/10.1109/COLCOMCON.2012.6233678","url":null,"abstract":"Development of the Wireless Sensor Networks (WSN) has been promoted by advances in miniaturization, ubiquitous communication, and digital convergence. This technology allows the creation of new applications by implementing of new infrastructure and data acquisition layers. This work presents two applications of WSN supported by the IEEE 802.15.4 protocol; the first one is oriented to monitoring a mushroom crop and the other one to e-health. Both applications are monitoring-oriented, results obtained show how WSN can be used to support requirements of applications for data acquisition in distributed and collaborative way.","PeriodicalId":412983,"journal":{"name":"2012 IEEE Colombian Communications Conference (COLCOM)","volume":"35 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131151487","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: 17
Platform for the developing of ubiquitous health services 发展普适卫生服务的平台
2012 IEEE Colombian Communications Conference (COLCOM) Pub Date : 2012-05-16 DOI: 10.1109/COLCOMCON.2012.6233639
Z. Solarte, L. Peña, D. Almario, O. Mondragon
{"title":"Platform for the developing of ubiquitous health services","authors":"Z. Solarte, L. Peña, D. Almario, O. Mondragon","doi":"10.1109/COLCOMCON.2012.6233639","DOIUrl":"https://doi.org/10.1109/COLCOMCON.2012.6233639","url":null,"abstract":"Ubiquitous computing is a concept that has gained great importance around the world where major projects are being developed about this topic. Ubiquitous systems have several applications in many fields as industry, education and health, among others. In the latter, ubiquitous systems serve to support both the patient and health professionals to improve healthcare, through efficient access to critical information to diagnosis, treatment, and monitoring of the patient. This document shows a platform for the creation of health-oriented ubiquitous services which permits the development of ubiquitous systems in the health domain, the selection mechanisms of the physiological and context variables and finally the implementation of a prototype to validate the platform.","PeriodicalId":412983,"journal":{"name":"2012 IEEE Colombian Communications Conference (COLCOM)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128763102","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
Using android platformin vertical handoff research 利用android平台进行垂直切换研究
2012 IEEE Colombian Communications Conference (COLCOM) Pub Date : 2012-05-16 DOI: 10.1109/COLCOMCON.2012.6233640
L. S. Munar, J. D. T. Polania, A. G. Dávalos
{"title":"Using android platformin vertical handoff research","authors":"L. S. Munar, J. D. T. Polania, A. G. Dávalos","doi":"10.1109/COLCOMCON.2012.6233640","DOIUrl":"https://doi.org/10.1109/COLCOMCON.2012.6233640","url":null,"abstract":"Massive use of wireless networks and the high rate penetration of mobile deviceshave raised several challenges to developers. One of the research problems of the data wireless networks is the so-called vertical handoff, and a great number of vertical handoff algorithms (VHA) that have been proposed. Most of these algorithms have been tested in simulated environments using simulation tools (e.g. NS-2, OMNeT++, NCTUNs), but only a few algorithms have been tested in a real environment. This paper presents a VHA controlled from a mobile phone and a software prototype for Android platform. One of the goals of our research was to validate the potential of Android's platforms as a tool for research in the topic of controlled vertical handoff from mobile device (MCVHO).","PeriodicalId":412983,"journal":{"name":"2012 IEEE Colombian Communications Conference (COLCOM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115560660","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
A model for urban microcell radio propagation prediction focused on reliable implementation 城市微蜂窝无线电传播预测模型的重点是可靠的实现
2012 IEEE Colombian Communications Conference (COLCOM) Pub Date : 2012-05-16 DOI: 10.1109/COLCOMCON.2012.6233651
Yuri Hercilia Mejía Melgarejo, Homero Ortega Boada, Marcos Duván Pineda Alhucema
{"title":"A model for urban microcell radio propagation prediction focused on reliable implementation","authors":"Yuri Hercilia Mejía Melgarejo, Homero Ortega Boada, Marcos Duván Pineda Alhucema","doi":"10.1109/COLCOMCON.2012.6233651","DOIUrl":"https://doi.org/10.1109/COLCOMCON.2012.6233651","url":null,"abstract":"A radio propagation model for microcellular environments is presented. The model foundation is the creation of many different virtual sources, for that reason a technique for limiting the number of sources created without loss accuracy is proposed. The main purpose of this model is achieve an easy and reliable algorithm implementation, then the assignment of a radiation pattern; using ray-tracing, radiative energy transfer (RET) theory or uniform diffraction theory (UTD) depending on the phenomenon; as a source's property is shown. Additionally the path loss prediction is improved regarding ground reflection and including the attenuation effects of crossing trees and buildings. This model would play a key role in planning UHF wireless networks that is the case of future implementation of IMT- Advanced because it computes the essential large scale parameters and regard some shadow fading components.","PeriodicalId":412983,"journal":{"name":"2012 IEEE Colombian Communications Conference (COLCOM)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126239996","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
LDPC-based spaced-time coded OFDMA systems and opportunistic beamforming 基于ldpc的空时编码OFDMA系统和机会波束形成
2012 IEEE Colombian Communications Conference (COLCOM) Pub Date : 2012-05-16 DOI: 10.1109/COLCOMCON.2012.6233650
R. T. Kaido, W. Godoy
{"title":"LDPC-based spaced-time coded OFDMA systems and opportunistic beamforming","authors":"R. T. Kaido, W. Godoy","doi":"10.1109/COLCOMCON.2012.6233650","DOIUrl":"https://doi.org/10.1109/COLCOMCON.2012.6233650","url":null,"abstract":"We consider a space-time coded OFDMA (orthogonal frequency division multiple access) system, with two or more antennas at the transmitter and only one at each receiver. A technique, called opportunistic beamforming (OBF) is used to improve the throughput of the system. In this schema, the antennas at the transmitter can be induced to modulate the signals with pseudo-random beamforming coefficients. The main purpose of that is to increase the diversity gain channels at the users. The antennas used for this system are called “dumb” antennas. Then, to reduce errors during transmission, we propose a low-density parity-check (LDPC) codes for this system. The LDPC codes can exploit the spatial-diversity and the selective-fading diversity channels in wireless communications. Including, these kind of codes offer low-complexity at the receiver and scalability to the system. Each receiver employs a maximum a posteriori expectation-maximization (MAP-EM) demodulator and a soft LDPC decoder.","PeriodicalId":412983,"journal":{"name":"2012 IEEE Colombian Communications Conference (COLCOM)","volume":"5 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132154440","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: 1
Tools evaluation for speech recognition based on domain ontologies over the 基于领域本体的语音识别工具评价
2012 IEEE Colombian Communications Conference (COLCOM) Pub Date : 2012-05-16 DOI: 10.1109/COLCOMCON.2012.6233653
A. Platform, M. Orlando, C. Andrea, F. I. D. Marcela
{"title":"Tools evaluation for speech recognition based on domain ontologies over the","authors":"A. Platform, M. Orlando, C. Andrea, F. I. D. Marcela","doi":"10.1109/COLCOMCON.2012.6233653","DOIUrl":"https://doi.org/10.1109/COLCOMCON.2012.6233653","url":null,"abstract":"Speech recognition is a natural way of interaction between people and mobile devices. However, the inclusion of all vocabulary variants for a specific language may be tricky and expensive on processing terms; also voice training is not appreciated by most of users. Speech recognition matters have been addressed from several ways, even including artificial intelligence concepts as recent IPhone Siri system, but most of them are proprietary solutions. This paper explores other research alternatives related with the use of domain ontologies to restrict the vocabulary to the application context and assist the speech recognition process. Specifically, a first approach is given by evaluating the most important components involved on the speech recognition process based on domain ontologies, using open source tools over Android platform.","PeriodicalId":412983,"journal":{"name":"2012 IEEE Colombian Communications Conference (COLCOM)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129405231","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: 1
ZigBee profile specification for mobile robotics 移动机器人的ZigBee配置文件规范
2012 IEEE Colombian Communications Conference (COLCOM) Pub Date : 2012-05-16 DOI: 10.1109/COLCOMCON.2012.6233673
J. Villegas, C. Madrigal, S. Serna
{"title":"ZigBee profile specification for mobile robotics","authors":"J. Villegas, C. Madrigal, S. Serna","doi":"10.1109/COLCOMCON.2012.6233673","DOIUrl":"https://doi.org/10.1109/COLCOMCON.2012.6233673","url":null,"abstract":"This paper presents the specification of a ZigBee profile for mobile robotics, highlighting the main sensors and actuators required for the development of the activities of such systems, and existing relationships with the clusters defined in the ZigBee cluster library. The specification is performed using a standard graphical language commonly used in industrial systems modeling - UML. The validation was performed using modems, sensors and low-cost microcontrollers, obtaining a satisfactory response in a controlled environment. Validation is required to perform a more complex functionality, more robots and industrial environments with industrial features.","PeriodicalId":412983,"journal":{"name":"2012 IEEE Colombian Communications Conference (COLCOM)","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124719570","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
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