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

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A Usage Control Platform Based on Rule Templates and Authorization Credentials 基于规则模板和授权凭证的使用控制平台

2015 XXXIII Brazilian Symposium on Computer Networks and Distributed Systems Pub Date : 2015-05-18 DOI: 10.1109/SBRC.2015.17

Maicon Stihler, A. Santin, Arlindo L. Marcon

引用次数: 0

A QoE-Aware Mechanism to Improve the Dissemination of Live Videos over VANETs 一种qos感知机制以改善vanet上的实时视频传播

2015 XXXIII Brazilian Symposium on Computer Networks and Distributed Systems Pub Date : 2015-05-18 DOI: 10.1109/SBRC.2015.15

Carlos Quadros, A. Santos, M. Gerla, E. Cerqueira

{"title":"A QoE-Aware Mechanism to Improve the Dissemination of Live Videos over VANETs","authors":"Carlos Quadros, A. Santos, M. Gerla, E. Cerqueira","doi":"10.1109/SBRC.2015.15","DOIUrl":"https://doi.org/10.1109/SBRC.2015.15","url":null,"abstract":"Real-time video dissemination over Vehicular Ad-hoc NETworks (VANETs) is challenging due to its strict quality requirements, dynamic network topology, and broadcast environment. Although Statistical Routing Protocols (SRPs) have been applied by using positioning and Quality of Service (QoS) parameters, they are not enough to obtain satisfactory Quality of Experience (QoE) levels in multi-hop video dissemination due to different requirements of multimedia services. This paper introduces the QOe-aware REceiver-based (QORE) mechanism to improve the dissemination of real-time videos in VANETs. QORE employs a QoE-driven Unequal Error Protection (UEP) scheme, namely Interleaving, which mitigates the effects of frame loss by spreading out the bursty losses. Further, QORE can be integrated with SRPs to offer QoE-driven parameters for the relay node selection and backbone maintenance. Thus, nodes decide for themselves to retransmit further the video sequences, enhancing the capacity of the system in delivering QoE-aware live videos. QORE was added to a straightforward Distance-based SRP, named DQORE. Results show the gains of DQORE in relation to SRPs, achieving video dissemination with QoE support, less routing overhead, and robustness in V2V VANETs.","PeriodicalId":307266,"journal":{"name":"2015 XXXIII Brazilian Symposium on Computer Networks and Distributed Systems","volume":"59 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":"123833187","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: 10

An Efficient Solution to perform Automatic Meter Reading using an Unmanned Aerial Vehicle 使用无人机执行自动抄表的有效解决方案

2015 XXXIII Brazilian Symposium on Computer Networks and Distributed Systems Pub Date : 2015-05-18 DOI: 10.1109/SBRC.2015.21

J. R. Neto, D. Guidoni, J. Ueyama, L. Villas

{"title":"An Efficient Solution to perform Automatic Meter Reading using an Unmanned Aerial Vehicle","authors":"J. R. Neto, D. Guidoni, J. Ueyama, L. Villas","doi":"10.1109/SBRC.2015.21","DOIUrl":"https://doi.org/10.1109/SBRC.2015.21","url":null,"abstract":"The most electrical power suppliers to recruit meter readers to carry out collection of power consumption of the consumers. This activity is done manually and can provide error and cause financial and physical losses. Solutions have been proposed in the literature focusing on more efficient routes for meter readers or the use of a car to perform the task remotely, which can increase the cost and have delayed task by problems of transit traffic. To overcome these challenges and constraints, we propose an architecture to automatic meter reading (AMR) system using Unmanned Aerial Vehicles. Two main contributions can be absorbed of this solution: i) the meter readers are no longer needed; ii) reducing the time and distance to carry out the collection of the readings from the power meters. In addition a protocol that ensures wireless communication between the Unmanned Aerial Vehicle and the power meters was designed. The solution was validated and evaluated in an urban environment and the results achieved show a decrease up to 72.6% of time and 45.1% of the distance as compared to the use a car. The communication protocol can avoid at least 98.3% of packet collisions.","PeriodicalId":307266,"journal":{"name":"2015 XXXIII Brazilian Symposium on Computer Networks and Distributed Systems","volume":"10 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":"115785196","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

Resilient Strategies to SDN: An Approach Focused on Actively Replicated Controllers SDN的弹性策略:一种专注于主动复制控制器的方法

2015 XXXIII Brazilian Symposium on Computer Networks and Distributed Systems Pub Date : 2015-05-18 DOI: 10.1109/SBRC.2015.37

E. S. Spalla, D. Mafioletti, A. Liberato, Christian Esteve Rothenberg, Lásaro J. Camargos, R. Villaça, M. Martinello

{"title":"Resilient Strategies to SDN: An Approach Focused on Actively Replicated Controllers","authors":"E. S. Spalla, D. Mafioletti, A. Liberato, Christian Esteve Rothenberg, Lásaro J. Camargos, R. Villaça, M. Martinello","doi":"10.1109/SBRC.2015.37","DOIUrl":"https://doi.org/10.1109/SBRC.2015.37","url":null,"abstract":"Software Defined Networking (SDN) are based on the separation of control and data planes. The SDN controller, although logically centralized, should be effectively distributed for high availability. Since the specification of OpenFlow 1.2, there are new features that allow the switches to communicate with multiple controllers that can play different roles -- master, slave, and equal. However, these roles alone are not sufficient to guarantee a resilient control plane and the actual implementation remains an open challenge for SDN designers. In this paper, we explore the OpenFlow roles for the design of resilient SDN architectures relying on multi-controllers. As a proof of concept, a strategy of active replication was implemented in the Ryu controller, using the OpenReplica service to ensure consistent state among the distributed controllers. The prototype was tested with commodity RouterBoards/MikroTik switches and evaluated for latency in failure recovery and switch migration for different workloads. We observe a set of trade-offs in real experiments with varyin workloads at both the data and control plane.","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":"114924486","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: 8

A Spam Traffic Cost Analysis for Network Operators 网络运营商垃圾邮件流量成本分析

2015 XXXIII Brazilian Symposium on Computer Networks and Distributed Systems Pub Date : 2015-05-18 DOI: 10.1109/SBRC.2015.16

O. Fonseca, E. Fazzion, Ítalo F. S. Cunha, P. Las-Casas, D. Guedes, Wagner Meira Jr, C. Hoepers, Klaus Steding-Jessen, M. H. Chaves

引用次数: 0

Using Partial Correlation for Effective Metric Selection and Anomaly Detection in Multi-tier System 基于偏相关的多层系统有效度量选择与异常检测

2015 XXXIII Brazilian Symposium on Computer Networks and Distributed Systems Pub Date : 2015-05-18 DOI: 10.1109/SBRC.2015.39

O. J. A. Pinno, S. Correa, A. Santos, K. Cardoso

{"title":"Using Partial Correlation for Effective Metric Selection and Anomaly Detection in Multi-tier System","authors":"O. J. A. Pinno, S. Correa, A. Santos, K. Cardoso","doi":"10.1109/SBRC.2015.39","DOIUrl":"https://doi.org/10.1109/SBRC.2015.39","url":null,"abstract":"Large-scale data centers allow organizations to gain access to computer resources without incurring high costs in purchasing and maintaining IT infrastructure. In these environments, due to the large number of hardware and software involved, anomaly detection is difficult but essential for service provisioning. Computer systems hosted in data centers usually involve multiple layers and provide a large set of metrics for tracking their operation. The analysis of all available metrics generates drawbacks associated with communication, storage and processing. A more efficient way to support anomaly detection and minimize the cost of monitoring is to use stable statistical correlations among metrics that reflect the system state. We present the strategies PCTN, MST-PCTN and PCTN-MST, based on partial correlation, for selecting metrics to support anomaly detection in multi-tier systems. We evaluate the proposed strategies using an e-commerce, Web transaction benchmark. Results show that the PCTN-MST strategy allowed the construction of a monitoring network with 8% less metrics than that obtained with MST and achieved a fault coverage up to 10% larger.","PeriodicalId":307266,"journal":{"name":"2015 XXXIII Brazilian Symposium on Computer Networks and Distributed Systems","volume":"14 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":"115082385","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

Balancing Energy, Redundancy, and Performance in Datacenter Networks 平衡数据中心网络的能量、冗余和性能

2015 XXXIII Brazilian Symposium on Computer Networks and Distributed Systems Pub Date : 2015-05-18 DOI: 10.1109/SBRC.2015.24

Antonio Araujo, L. Sampaio, A. Ziviani

引用次数: 5

An Analytic-Deterministic Model for Traffic Prioritization in Software Defined Networks with Network Calculus 基于网络演算的软件定义网络流量优先排序分析确定性模型

2015 XXXIII Brazilian Symposium on Computer Networks and Distributed Systems Pub Date : 2015-05-18 DOI: 10.1109/SBRC.2015.19

Michael Prieto Hernandez, Ricardo Girnis Tombi, S. Kopp, D. Batista, C. Margi, R. M. Silveira

引用次数: 0

Access Decision System for Seamless Connectivity in Heterogeneous Wireless Networks 异构无线网络中无缝连接的接入决策系统

2015 XXXIII Brazilian Symposium on Computer Networks and Distributed Systems Pub Date : 2015-05-18 DOI: 10.1109/SBRC.2015.18

Robson Melo, Renan Polisciuc, M. N. Lima, A. Santos

{"title":"Access Decision System for Seamless Connectivity in Heterogeneous Wireless Networks","authors":"Robson Melo, Renan Polisciuc, M. N. Lima, A. Santos","doi":"10.1109/SBRC.2015.18","DOIUrl":"https://doi.org/10.1109/SBRC.2015.18","url":null,"abstract":"The overlay of several wireless technologies, such as Wi-Fi and LTE, in a geographic region has increased with the popularity of portable devices equipped with two or more communication interfaces. In this new scenario, a key challenge is the choice of network access and technology that best meets the users requirements. Nowadays, the network selection is based on performance criteria, as the strength of the transmission signal. However, with the advance in communication networks intended to provide highly efficient communication to end users, high transmission rates, security and Quality of Experience (QoE), it is necessary to employ criteria that represent more the users needs, in order to assist the access decision. In this direction, this work presents a decision-making system for the access network selection based on Markov Decision Process, in which the current choice does not depend on the historical choices. The system employs both performance and security criteria in the analysis of network quality. The Network Simulator 3 (NS3) has been used in the system evaluation, and the analysis of the results shows a reduction in the number of unnecessary transitions and effectiveness in choosing the most reliable network.","PeriodicalId":307266,"journal":{"name":"2015 XXXIII Brazilian Symposium on Computer Networks and Distributed Systems","volume":"40 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":"131628315","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 Bayesian Game Based Optimization Strategy Proposal for Routing in Energy Constrained DTNs 基于贝叶斯博弈的能量受限dtn路由优化策略研究

2015 XXXIII Brazilian Symposium on Computer Networks and Distributed Systems Pub Date : 2015-05-18 DOI: 10.1109/SBRC.2015.12

S. L. F. Maia, Éderson Rosa Da Silva, P. R. Guardieiro

{"title":"A Bayesian Game Based Optimization Strategy Proposal for Routing in Energy Constrained DTNs","authors":"S. L. F. Maia, Éderson Rosa Da Silva, P. R. Guardieiro","doi":"10.1109/SBRC.2015.12","DOIUrl":"https://doi.org/10.1109/SBRC.2015.12","url":null,"abstract":"In this paper, we propose an optimization strategy to be applied to a well-known DTN routing algorithm as PRoPHET and SimBetTS which, by default, don't regard to the issue of energy constraint. Our proposed strategy is based on modeling of the message forwarding as a Bayesian game that aims specifically to capture the dynamic nature of the multi-copy replication decisions, the energy constraint of the nodes and the belief about the energy of other nodes. In addition, we consider factors of evidence aging on accumulated observations used to update the belief that a node has about the energy of the other nodes. The main feature of this belief update system is not to utilize neighborhood watch or acknowledgment mechanism. Moreover, in this paper, we conduct simulation experiments to evaluate the performance of our optimization strategy proposal from a DTN scenario with heterogeneous nodes based on realistic human mobility traces. Simulations results show that our proposed optimization strategy is able to lead the network to remain operational for a longer period of time and, consequently, to achieve a higher final delivery ratio even when compared to a proposal using energy-aware routing.","PeriodicalId":307266,"journal":{"name":"2015 XXXIII Brazilian Symposium on Computer Networks and Distributed Systems","volume":"27 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":"115761404","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: 9

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