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2015 XXXIII Brazilian Symposium on Computer Networks and Distributed Systems最新文献

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Policies for Assisted Virtual Machine Selection in Cloud Computing Environments 云计算环境下辅助虚拟机选择策略
2015 XXXIII Brazilian Symposium on Computer Networks and Distributed Systems Pub Date : 2015-05-18 DOI: 10.1109/SBRC.2015.35
M. Teixeira, Azer Bestavros
{"title":"Policies for Assisted Virtual Machine Selection in Cloud Computing Environments","authors":"M. Teixeira, Azer Bestavros","doi":"10.1109/SBRC.2015.35","DOIUrl":"https://doi.org/10.1109/SBRC.2015.35","url":null,"abstract":"In this paper we propose an end-to-end approach to the VM allocation problem using policies based uniquely on round-trip time measurements between VMs. We propose and implement end-to-end algorithms for VM selection that cover desirable profiles of communications between VMs in distributed applications in a cloud setting. The use of informed VM selection allowed us to select instances with an average RTT up to 85% lower, in one case, and to find local and global centers of VM clusters in another. The approach described is completely independent from cloud architecture and is adaptable to different types of applications and workloads, as well as lightweight and transparent for cloud providers.","PeriodicalId":307266,"journal":{"name":"2015 XXXIII Brazilian Symposium on Computer Networks and Distributed Systems","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115732039","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
Dynamic algorithm for bluetooth network formation in urban sensing applications 动态蓝牙网络形成算法在城市传感中的应用
2015 XXXIII Brazilian Symposium on Computer Networks and Distributed Systems Pub Date : 2015-05-18 DOI: 10.1109/SBRC.2015.7446213
G. Pieri, Werner Kraus, J. Farines
{"title":"Dynamic algorithm for bluetooth network formation in urban sensing applications","authors":"G. Pieri, Werner Kraus, J. Farines","doi":"10.1109/SBRC.2015.7446213","DOIUrl":"https://doi.org/10.1109/SBRC.2015.7446213","url":null,"abstract":"We propose a new algorithm for building ad-hoc networks among mobile devices tailored for small and dynamic environments using the Bluetooth interface. The target application is network formation among passengers on urban buses. The proposed algorithm assigns roles to the network participants for reducing the effect of nodes leaving the network upon alighting. Based on estimates of node permanence onboard, an application dependent mechanism assign roles to the nodes indicating those more apt to perform a given function in the network (masters, slaves or gateways). Simulation studies indicate improvements of up to 75% in the times needed to rebuild the network after nodes have left in comparison to a classic algorithm. Performance levels in relation to the quality of estimates are also evaluated for indication of accuracy of estimation needed for proper application of the algorithm.","PeriodicalId":307266,"journal":{"name":"2015 XXXIII Brazilian Symposium on Computer Networks and Distributed Systems","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117115995","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 SMS to Transfer Small Data Packets during Periods of High Workload on Mobile Data Networks 在移动数据网络高业务量时，利用短信传输小数据包
2015 XXXIII Brazilian Symposium on Computer Networks and Distributed Systems Pub Date : 2015-05-18 DOI: 10.1109/SBRC.2015.40
Hayala Nepomuceno Curto, H. T. Marques-Neto, A. Ziviani, J. Almeida, J. Caetano, Carlos Henrique S. Malab
{"title":"Using SMS to Transfer Small Data Packets during Periods of High Workload on Mobile Data Networks","authors":"Hayala Nepomuceno Curto, H. T. Marques-Neto, A. Ziviani, J. Almeida, J. Caetano, Carlos Henrique S. Malab","doi":"10.1109/SBRC.2015.40","DOIUrl":"https://doi.org/10.1109/SBRC.2015.40","url":null,"abstract":"This paper proposes an SMS-based platform for transferring small data packets, allowing mobile applications to operate even in situations in which the data traffic over mobile data networks is unavailable or under congestion. We first conduct a workload characterization of a Brazilian mobile network during recent large-scale events to verify calls and SMS usage patterns at such events. This characterization pointed out that voice calls and SMS work relatively well in these large-scale events, despite frequent reports from users about the data network congestion. As both transmission and reception of SMSes tend to remain in operation even during network overload, we propose in this paper the usage of SMSes to transfer small data packets during such periods. Thus we will keep key mobile applications transferring data even during periods of high workload or unavailability of the mobile network. We believe that this work could improve users' experience during large scale events and similar situations where mobile data networks are under congestion or unavailable.","PeriodicalId":307266,"journal":{"name":"2015 XXXIII Brazilian Symposium on Computer Networks and Distributed Systems","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116035346","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: 3
Managing Access to Service Providers in Federated Identity Environments: A Case Study in a Cloud Storage Service 在联邦身份环境中管理对服务提供者的访问:云存储服务中的案例研究
2015 XXXIII Brazilian Symposium on Computer Networks and Distributed Systems Pub Date : 2015-05-18 DOI: 10.1109/SBRC.2015.32
Thomas Diniz, Andre Castro de Felippe, Tainá Medeiros, Carlos Eduardo da Silva, Roberto Araújo
{"title":"Managing Access to Service Providers in Federated Identity Environments: A Case Study in a Cloud Storage Service","authors":"Thomas Diniz, Andre Castro de Felippe, Tainá Medeiros, Carlos Eduardo da Silva, Roberto Araújo","doi":"10.1109/SBRC.2015.32","DOIUrl":"https://doi.org/10.1109/SBRC.2015.32","url":null,"abstract":"Currently the diversity of services, which are adhering to Identity Federation, has raised new challenges in the area. Increasingly, service providers need to control the access to their resources by users from the federation as, even though the user is authenticated by the federation, its access to resources cannot be taken for granted. Each Service Provider (SP) of a federation implements their own access control mechanism. Moreover, SPs might need to allow different access control granularity. For instance, all users from a particular Identity Provider (IdP) may access the resources due to some financial agreement. On the other hand, it might be the case that only specific users, or groups of users, have access to the resources. This paper proposes a solution to this problem through a hierarchical authorization system. Our approach, which can be customized to different SPs, allows the SP administrator to manage which IdPs, or users, have access to the provided resources. In order to demonstrate the feasibility of our approach, we present a case study in the context of a cloud storage solution.","PeriodicalId":307266,"journal":{"name":"2015 XXXIII Brazilian Symposium on Computer Networks and Distributed Systems","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125917302","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: 6
Cloud Federations and Security Attributes 云联盟和安全属性
2015 XXXIII Brazilian Symposium on Computer Networks and Distributed Systems Pub Date : 2015-05-18 DOI: 10.1109/SBRC.2015.26
Luciano Barreto, J. Fraga, Frank Siqueira
{"title":"Cloud Federations and Security Attributes","authors":"Luciano Barreto, J. Fraga, Frank Siqueira","doi":"10.1109/SBRC.2015.26","DOIUrl":"https://doi.org/10.1109/SBRC.2015.26","url":null,"abstract":"Nowadays, the concept of Federations has drawn attention of the research community in the area of cloud computing. In a cloud federation, cloud providers build trust relationships and share resources, aiming to overcome momentary resource shortage or to offer a wider range of resources to their users. This paper introduces an infrastructure for building a cloud federation, which defines organization principles and strategies for searching and acquiring resources in a federation. In addition, aiming to allow cross-domain identity management, the proposed infrastructure incorporates authentication and authorization mechanisms in the context of a federation. Simulation results show the feasibility of the proposed infrastructure.","PeriodicalId":307266,"journal":{"name":"2015 XXXIII Brazilian Symposium on Computer Networks and Distributed Systems","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128257610","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
A Platform for Monitoring Service-Level Metrics in Software Defined Networks 软件定义网络中服务水平度量的监控平台
2015 XXXIII Brazilian Symposium on Computer Networks and Distributed Systems Pub Date : 2015-05-18 DOI: 10.1109/SBRC.2015.14
Pedro H. A. Rezende, P. S. Coelho, L. Faina, Lásaro J. Camargos, R. Pasquini
{"title":"A Platform for Monitoring Service-Level Metrics in Software Defined Networks","authors":"Pedro H. A. Rezende, P. S. Coelho, L. Faina, Lásaro J. Camargos, R. Pasquini","doi":"10.1109/SBRC.2015.14","DOIUrl":"https://doi.org/10.1109/SBRC.2015.14","url":null,"abstract":"This paper presents and evaluates a platform for monitoring service-level metrics in OpenFlow Software Defined Networks (SDN), named SDNMon. The platform supports frequent network observation, at different granularity levels, including per-flow observation, being able to present accurate on-the-fly statistics regarding throughput and delay. The evaluation considered two statistical data gathering approaches, a proposed polling-based mechanism which collects information kept by OpenFlow counters at the network elements, and an alternate sampling-based mechanism which uses sFlow.","PeriodicalId":307266,"journal":{"name":"2015 XXXIII Brazilian Symposium on Computer Networks and Distributed Systems","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132063842","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
Distributed Spatial Join Processing for Multiple Spatial Datasets - Multi-way Spatial Join 多空间数据集的分布式空间连接处理——多路空间连接
2015 XXXIII Brazilian Symposium on Computer Networks and Distributed Systems Pub Date : 2015-05-18 DOI: 10.1109/SBRC.2015.29
Anderson Rogerio Cunha, S. S. T. D. Oliveira, Thiago Borges de Oliveira, E. L. Aleixo, Marcelo de Castro Cardoso, Vagner José do Sacramento Rodrigues
{"title":"Distributed Spatial Join Processing for Multiple Spatial Datasets - Multi-way Spatial Join","authors":"Anderson Rogerio Cunha, S. S. T. D. Oliveira, Thiago Borges de Oliveira, E. L. Aleixo, Marcelo de Castro Cardoso, Vagner José do Sacramento Rodrigues","doi":"10.1109/SBRC.2015.29","DOIUrl":"https://doi.org/10.1109/SBRC.2015.29","url":null,"abstract":"This paper proposes the Distributed Synchronous Traversal algorithm (DST) for distributed processing of spatial join with multiple datasets (Multi-way Spatial Join). It was evaluated over clusters up to eight servers, and just like the Synchronous Traversal algorithm, performs spatial join by synchronously traversing the input R-Trees. The experiments results on real datasets have shown that the algorithm provides a satisfactory degree of horizontal scalability.","PeriodicalId":307266,"journal":{"name":"2015 XXXIII Brazilian Symposium on Computer Networks and Distributed Systems","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124794561","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
Characterizing User Behavior on a Mobile SMS-Based Chat Service 基于手机短信聊天服务的用户行为特征分析
2015 XXXIII Brazilian Symposium on Computer Networks and Distributed Systems Pub Date : 2015-05-18 DOI: 10.1109/SBRC.2015.25
Rafael Almeida de Oliveira, Wladmir Cardoso Brandão, H. T. Marques-Neto
{"title":"Characterizing User Behavior on a Mobile SMS-Based Chat Service","authors":"Rafael Almeida de Oliveira, Wladmir Cardoso Brandão, H. T. Marques-Neto","doi":"10.1109/SBRC.2015.25","DOIUrl":"https://doi.org/10.1109/SBRC.2015.25","url":null,"abstract":"The use of mobile instant messaging (IM) services has grown significantly last years. Usually, mobile chat services work over the Internet using cellphone carriers' resources, such as the SMS (Short Message Service) platforms. Understanding the user behavior in this environment is paramount to improve service performance and user experience. In this article, we present and discuss a characterization of the user behavior on a mobile SMS-based chat service. We describe the usage patterns of this service providing a daily perspective of user behavior. We show that a very small group of heavy users consumes a significant amount of carrier's resources. Moreover, we also present the transitions and navigation patterns of this very small group of users to understand their peculiar behavior.","PeriodicalId":307266,"journal":{"name":"2015 XXXIII Brazilian Symposium on Computer Networks and Distributed Systems","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123568647","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: 7
A Middleware Platform for Integrating Devices and Developing Applications in E-Health 电子医疗中集成设备和开发应用的中间件平台
2015 XXXIII Brazilian Symposium on Computer Networks and Distributed Systems Pub Date : 2015-05-01 DOI: 10.1109/SBRC.2015.13
Pedro Maia, A. Baffa, Everton Cavalcante, Flávia Coimbra Delicato, T. Batista, Paulo F. Pires
{"title":"A Middleware Platform for Integrating Devices and Developing Applications in E-Health","authors":"Pedro Maia, A. Baffa, Everton Cavalcante, Flávia Coimbra Delicato, T. Batista, Paulo F. Pires","doi":"10.1109/SBRC.2015.13","DOIUrl":"https://doi.org/10.1109/SBRC.2015.13","url":null,"abstract":"In the Internet of Things (IoT) vision, any physical or virtual object can be identified, addressable, controlled, and monitored via Internet. In the e-health scenario, these smart objects can be body sensors allowing the continuous monitoring of vital signs of patients. Due to the inherent heterogeneity of such devices, it is necessary to enable interoperability among them and to facilitate the development of applications that make use of the provided data. In this context, this paper introduces EcoHealth (Ecosystem of Health Care Devices), a middleware platform that integrates heterogeneous body sensors for enabling the remote monitoring of patients and improving medical diagnosis. In this paper, we present the EcoHealth architecture and a performance evaluation with an e-health application developed as proof of concept.","PeriodicalId":307266,"journal":{"name":"2015 XXXIII Brazilian Symposium on Computer Networks and Distributed Systems","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126152472","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
Mapping the Media Universe Using User-Generated Data in Online Social Networks 使用在线社交网络中的用户生成数据映射媒体世界
2015 XXXIII Brazilian Symposium on Computer Networks and Distributed Systems Pub Date : 2015-05-01 DOI: 10.1109/SBRC.2015.33
Pedro Holanda, Bruno Guilherme, J. P. Cardoso, Ana Paula Couto da Silva, Olga Goussevskaia
{"title":"Mapping the Media Universe Using User-Generated Data in Online Social Networks","authors":"Pedro Holanda, Bruno Guilherme, J. P. Cardoso, Ana Paula Couto da Silva, Olga Goussevskaia","doi":"10.1109/SBRC.2015.33","DOIUrl":"https://doi.org/10.1109/SBRC.2015.33","url":null,"abstract":"The way people watch movies and TV has been going through great changes in recent years, one being that people are increasingly willing to share their TV watching habits with friends (and strangers) through online social network platforms. In this work, we collect usage data from the online social network tvtag and propose a data structure to represent and efficiently retrieve similarity information about movies and TV shows. We refer to this structure as \"map of media\", because it consists of a multi-dimensional Euclidean space, where each item is represented by a set of coordinates and the distance between them represents the similarity. We propose several metrics to evaluate the resulting structure and show that, besides computational efficiency, the proposed approach provides a high quality measure for item similarity. Moreover, the quality increases with increasing dimensionality of the map.","PeriodicalId":307266,"journal":{"name":"2015 XXXIII Brazilian Symposium on Computer Networks and Distributed Systems","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116846113","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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