Publications
Journals[30] R. Costa, J. Lau, P. Portugal, F. vasques, R. Moraes, Handling Real-Time Communication in Infrastructured IEEE 802.11 Wireless Networks: The RT-WiFi Approach, Journal of Communications and Networks, 2019 (to be published)[29] T. Jesus, P. Portugal, F. Vasques, D. Costa, Automated Methodology for Dependability Evaluation of Wireless Visual Sensor Networks, Sensors, Vol. 18, Issus 8, 2018, DOI: 10.3390/s18082629 [28] L. Rodrigues, L. Leao, C. Montez, R. Moraes, P. Portugal, F. Vasques, An Advanced Battery Model for WSN Simulation in Environments With Temperature Variations, IEEE SENSORS JOURNAL Vol. 18 p. 8179-8191, 2018, DOI: 10.1109/jsen.2018.2863549 [27] E. Leao, R. Moraes, C. Montez, P. Portugal, F. Vasques, CT-SIM: A simulation model for wide-scale cluster-tree networks based on the IEEE 802.15.4 and ZigBee standards, INTERNATIONAL JOURNAL OF DISTRIBUTED SENSOR NETWORKS Vol. 13, 2017. DOI: 10.1177/1550147717698471 [26] L. Rodrigues, C. Montez, G. Budke, F. Vasques, P. Portugal, Estimating the Lifetime of Wireless Sensor Network Nodes through the Use of Embedded Analytical Battery Models, Journal of Sensors and Actuator Networks, 2017, 6(2), 8; doi:10.3390/jsan6020008 [25] D. Costa, F. Vasques,P. Portugal, Enhancing the Availability of Wireless Visual Sensor Networks: Selecting Redundant Nodes in Networks with Occlusion, Applied Mathematical Modelling, Volume: 42, Pages: 223-243, 2017, DOI: 10.1016/j.apm.2016.10.008 [24] E. Leao, C. Montez, R. Moraes, P. Portugal, F. Vasques, Alternative Path Communication in Wide-Scale Cluster-Tree Wireless Sensor Networks Using Inactive Periods, Sensors 2017, 17(5), 1049; doi:10.3390/s17051049 [23] L. Rodrigues, C. Montez, R. Moraes, P. Portugal, F. Vasques, A Temperature-Dependent Battery Model for Wireless Sensor Networks, Sensors 2017, 17(2), 422, doi:10.3390/s17020422 [22] E. Leao, R. Moraes, C. Montez, P. Portugal, F. Vasques, Ct-Sim: A Simulation Model for Wide-Scale Cluster-Tree Networks Based on the Ieee 802.15.4 and Zigbee Standards, International Journal of Distributes Sensor Networks, 13(3):155014771769847, 2017. DOI: 10.1177/1550147717698471 [21] E. Leao, C. Montez, R. Moraes, P. Portugal, F. Vasques, Superframe Duration Allocation Schemes to Improve the Throughput of Cluster-Tree Wireless Sensor Networks, Sensors 2017, 17(2), 249; doi:10.3390/s17020249 [20] P. Souto, P. Portugal, F. Vasques, Reliability Evaluation of Broadcast Protocols for Flexray, IEEE Transactions on Vehicular Technology, Volume: 65, Issue: 2, Feb. 2016, DOI: 10.1109/TVT.2015.2402216 [19] R. Lange, F. vasques, R. Oliveira, P. Portugal, A scheme for slot allocation of the the Flexray static segment based on response time analysis, Computer Communications, Volume 63, 1 June 2015, Pages 65-76, doi:10.1016/j.comcom.2015.02.016 [18] D. Costa, L. Guedes, I. Silva, F. Vasques, P. Portugal, Research trends in wireless visual sensor networks when exploiting prioritization, Sensors, 15(1), 1760-1784, 2015. doi:10.3390/s150101760. [17] D. Costa, L. Guedes, I. Silva, F. Vasques, P. Portugal, Relevance-based partial reliability in wireless sensor networks, EURASIP Journal on Wireless Communications and Networking 2014, 2014:142 doi:10.1186/1687-1499-2014-142 [16] C. Viegas, F. Vasques, P. Portugal, R. Moraes, Real-Time Communication in IEEE 802.11s Mesh Networks: Simulation Assessment considering the Interference of Non-Real-Time Traffic Sources, EURASIP Journal on Wireless Communications and Networking, 2014, 2014:219, doi:10.1186/1687-1499-2014-219 [15] D. Costa, L. Guedes, I. Silva, F. Vasques, P. Portugal, Availability Issues in Wireless Visual Sensor Networks, Sensors, Volume 14, Issue 2, pp. 2795-2821, 2014, DOI:10.3390/s140202795 [14] A. Pinto, C. Montez, G. Araújo, F. Vasques, P. Portugal, An Approach to Implement Data Fusion Techniques in Wireless Sensor Networks using Genetic Machine Learning Algorithms, Information Fusion, Volume 15, pp. 90-101, 2014. DOI: 10.1016/j.inffus.2013.05.003 [13] O. Valle, C. Montez, G. Araújo, P. Portugal, F. Vasques, Enhancing Wireless Sensor Network Simulators with Realistic Battery Discharge Function, Information, Vol. 16, No 12(B), pp. 8787-8780, December, 2013. [12] D. Costa, L. Guedes, F. Vasques and P. Portugal, Energy-Efficient Packet Relaying in Wireless Image Sensor Networks Exploiting the Sensing Relevancies of Source Nodes and DWT Coding, Journal of Sensor and Actuator Networks, Volume 2, pp. 424-448, 2013. DOI: doi:10.3390/jsan2030424. [11] D. Costa, L. Guedes, F. Vasques and P. Portugal, Adaptive Monitoring Relevance in Camera Networks for Critical Surveillance Applications, International Journal of Distributed Sensor Networks, Volume 2013 (2013), Article ID 836721, 14 pages, http://dx.doi.org/10.1155/2013/836721. [10] D. Costa, L. Guedes, F. Vasques and P. Portugal, Redundancy-based semi-reliable packet transmission in wireless visual sensor networks exploiting the sensing relevancies of source nodes, WSEAS Transactions on Communications, No. 9, Vol. 12, pp.468-478, 2013. [9] R. Viegas, L. Affonso, F. Vasques, P. Portugal, R. Moraes, A new MAC scheme speci?cally suited for real-time industrial communication based on IEEE 802.11e, Computers and Electrical Engineering, Volume: 39, Issue 6, pp. 1684-1704, 2012, DOI: 10.1016/j.compeleceng.2012.10.008, WOS:000324012800009 [8] R. Viegas, L. Affonso, F. Vasques, P. Portugal, R. Moraes, Real-Time Industrial Communication over IEEE802.11e Wireless Local Area Networks, IEEE Latin America Transactions, Vol. 10, No. 3, pp. 1844-1849, 2012, WOS:000305833000027 [7] I. Silva, L. Guedes, P. Portugal, F. Vasques, Reliability and Availability Evaluation of Wireless Sensor Networks for Industrial Applications, Sensors, Vol. 12, Issue 1, pp. 806-838, 2012, DOI: 10.3390/s120100806, WOS:000299537100043 [6] V. Rosset, P. Souto, P. Portugal, F. Vasques, Modeling the reliability of a group membership protocol for dual-scheduled time division multiple access networks, Journal of Computer Standards & Interfaces,Volume 34, Issue 3, pp 281-291, 2012, DOI: 10.1016/j.csi.2011.10.004, WOS:000301471900001 [5] R. Moraes, P. Portugal, F. Vasques, R. Custódio, Assessment of the IEEE 802.11e EDCA Protocol Limitations when Dealing with Real-Time Communication, EURASIP Journal on Wireless Communications and Networking, Vol. 2010, Article ID 351480, 14 pages, 2010, DOI: 10.1155/2010/351480, WOS:000281152700001 [4] R. Moraes, F. Vasques, P. Portugal, P. Souto, A forcing collision resolution approach able to prioritize traffic in CSMA-based networks, Computer Communications, Volume 33, Issue 1, pp. 54-64, 2010, DOI: 10.1016/j.comcom.2009.07.018, WOS:000273235800007 [3] R. Moraes, F. Vasques, P. Portugal, Survey of Real-Time Communication in CSMA-Based Networks, Network Protocols and Algorithms, Vol. 2, No. 1, pp. 158-183, 2010. [2] R. Moraes, F. Vasques, P. Portugal, J. Fonseca, VTP-CSMA: A Virtual Token Passing Approach for Real-Time Communication in IEEE 802.11 Wireless Networks, IEEE Transactions on Industrial Informatics, Volume 3, Issue 3, pp. 215-224, August 2007. DOI: 10.1109/TII.2007.903224, WOS:000248612000004 [1] R. Moraes, F. Vasques, P. Portugal, J. Fonseca, A Traffic Separation Mechanism (TSm) allowing the coexistence of CSMA and real-time traffic in Wireless 802.11e Networks, WSEAS Transactions on Communications, Vol. 5, Issue 5, pp. 890-897, May 2006. Book Chapters[7] D. Costa, L. Guedes, F. Vasques, P, Portugal, Multimedia Transmission in Wireless Sensor Networks. In Emerging Research on Networked Multimedia Communication Systems, pages 230-248. Igi Global, 2015.[6] C. Viegas, F. Vasques, P. Portugal, Real-Time Communication Support in Ieee 802.11-Based Wireless Mesh Networks, Encyclopedia of Information Science and Technology, Third Edition, pages 7247-7259. Igi Global, 2015 [5] E. Leão, F. Vasques, P. Portugal, Supporting Real-Time Communication in Large-Scale Wireless Sensor Networks, Encyclopedia of Information Science and Technology (3rd Ed.), pages 7371-7380, Igi Global, 2015. [4] I. Silva, L. Affonso, P. Portugal, Emerging Technologies for Industrial Wireless Sensor Networks, Embedded Computing Systems: Applications, Optimization, and Advanced Design. IGI Global, 2013, doi:10.4018/978-1-4666-3922-5.ch017. [3] M. Felser, R. Mitchell, P. Portugal, Profisafe, Industrial Communications Systems - Industrial Electronics Handbook - (2 edition), pp.46-1-46-15, CRC Press,ISBN-10: 1439802815, 2011. [2] M. Sousa, P. Portugal, Modbus, Industrial Communications Systems - Industrial Electronics Handbook -(2 edition), pp.36-1-36-16, CRC Press, ISBN-10: 1439802815, 2011. [1] P. Portugal, A. Carvalho, The GRAFCET specification language, Industrial Information Technology Handbook, pp.64-1-64-21, CRC Press, ISBN-10:0849319854, 2014. Conferences[93] E. Oliveira, J. Paulo, D. Costa, P. Portugal, Multiple Mobile Sinks in Event-based Wireless Sensor Networks Exploiting Traffic Conditions in Smart City Applications, 16th IEEE International Conference on Industrial Informatics (INDIN), 2018[92] T. Jesus, D. Costa, P. Portugal, On the Computing of Area Coverage by Visual Sensor Networks: Assessing Performance of Approximate and Precise Algorithms, 16th IEEE International Conference on Industrial Informatics (INDIN), 2018 [91] E. Leao, V. Vasconcelos, , P. Portugal, C. Montez, R. Moraes, A Hybrid Beacon Scheduling Scheme to Allow the Periodic Reconfiguration of Large-scale Cluster-tree WSNs, 16th IEEE International Conference on Industrial Informatics (INDIN), 2018 [90] L. Rodrigues, C. Montez, F. Vasques, P. Portugal, Recovery effect in low-power nodes of wireless sensor networks, 4th Workshop on Communication in Critical Embedded Systems, Wocces 2016, 3 June 2017. [89] B. Bitencort, R. Moraes, P. Portugal, F. Vasques, ADAPTA: Adaptive Timeslot Allocation Scheme for Ieee 802.15.4E Lldn Mode, IEEE 14th International Conference On Industrial Informatics, INDIN, 2016. [88] L. Rodrigues, C. Montez, F. Vasques, P. Portugal, Experimental Validation of a Battery Model for Low-Power Nodes in Wireless Sensor Networks, IEEE World Conference on Factory Communication Systems, WFCS, 2016. [87] E. Leao, F. Vasques, P. Portugal, R. Moraes, C. Montez, An Allocation Scheme for IEEE 802.15.4-Zigbee Cluster-Tree Networks, IEEE Industrial Electronics Conference, IECON, 2016. [86] B. Bitencort, F. Vasques, P. Portugal, R. Moraes, SAS: Slot Allocation Scheme for the Ieee 802.15.4E LLDN Mode, IEEE Industrial Electronics Conference, IECON, 2016. [85] T. Semprebom. C. Montez, G. Araujo, P. Portugal, A Sleep-Scheduling Scheme for Enhancing QoS and Network Coverage in IEEE 802.15.4 WSN, IEEE World Conference on Factory Communication Systems, WFCS, 2015. [84] M. Martins, P. Portugal, F. Vasques, A Framework to Support Dependability Evaluation of Wsns from Aadl Models, IEEE 20th Conference On Emerging Technologies and Factory Automation, ETFA, 2015. [83] R. Costa, P. Portugal, F. Vasques, C. Montez, R. Moraes, Limitations of the Ieee 802.11 Dcf, Pcf, Edca and Hcca to Handle Real-Time Traffic, IEEE International Conference On Industrial Informatics, INDIN, 2015. [82] D. Costa, I. Silva, L. Guedes, F. Vasques, P. Portugal, Optimal Sensing Redundancy for Multiple Perspectives of Targets in Wireless Visual Sensor Networks, IEEE International Conference On Industrial Informatics, INDIN, 2015. [81] T. Semprebom, C. Montez, DM. Araujo, P. Portugal, Skip Game: An autonomic approach for QoS and energy management in IEEE 802.15.4 WSN, 20th IEEE Symposium on Computers and Communication, ISCC 2015. [80] D. Costa, I. Silva, LA. Guedes, P. Portugal, F. Vasques, Enhancing Redundancy in Wireless Visual Sensor Networks for Target Coverage, 20th Brazilian Symposium on Multimedia and the Web, Webmedia, WoCCES, 2014. [79] L. Rodrigues,C. Montez, P. Portugal, F. Vasques, Escalonamento de Sono e Efeito Recuperação em Baterias de Nodos em Redes de Sensores sem Fio, II Workshop de Comunicação em Sistemas Embarcados Críticos - WoCCES 2014, XXXII Simpósio Brasileiro de Redes de Computadores e Sistemas Distribuídos,Florianópolis, Brazil, May 5-9, 2014. [78] D. Gressner, J. Proenza, M. Barranco, P. Portugal, Towards a reliability analysis of the design space for the communication subsystem of FT4FTT, 19th IEEE International Conference on Emerging Technologies & Factory Automation, Barcelona, Spain, September, 16-19, 2014. [77] D. Costa, I. Silva, L. Guedes, P. Portugal, F. Vasques, Availability Assessment of Wireless Visual Sensor Networks for Target Coverage, 19th IEEE International Conference on Emerging Technologies & Factory Automation, Barcelona, Spain, September, 16-19, 2014. [76] T. Semprebom, R. Moraes, C. Montez, P. Portugal, F. Vasques, Quality of Service Provision Assessment for DDBP Approach in IEEE 802.15.4 Networks, IEEE 12th International Conference on Industrial Informatics, INDIN 14, Porto Alegre, Brazil, July 27-30, 2014. [75] C. Viegas, F. Vasques, P. Portugal, Evaluating the Impact of Uncontrolled Traffic Sources upon Real-Time Communication in IEEE 802.11s Mesh Networks, IEEE 12th International Conference on Industrial Informatics, INDIN 14, Porto Alegre, Brazil, July 27-30, 2014. [74] E. Leão, F. Vasques, P. Portugal, C. Montez, An Opportunistic Approach to Deal with Real-Time Mesh Communication in Wireless Sensor Networks, IEEE 12th International Conference on Industrial Informatics, INDIN 14, Porto Alegre, Brazil, July 27-30, 2014. [73] D. Costa, L. Guedes, F. Vasques, P. Portugal, Relevance-based Balanced Sink Mobility in Wireless Visual Sensor Networks, IEEE 12th International Conference on Industrial Informatics, INDIN 14, Porto Alegre, Brazil, July 27-30, 2014. [72] D. Costa, I. Silva, L. Guedes, P. Portugal, F. Vasques, Selecting Redundant Nodes When Addressing Availability in Wireless Visual Sensor Networks, IEEE 12th International Conference on Industrial Informatics, INDIN 14,Porto Alegre, Brazil, July 27-30, 2014. [71] D. Costa, L. Guedes, F. Vasques and P. Portugal, Delay-aware DWT-based image transmission in wireless visual sensor networks, 19th Brazilian Symposium on Multimedia and the Web - WebMedia '13, 2013. http://dx.doi.org/10.1145/2526188.2526200 [70] M. Felske, C. Montez, A. Pinto, F. Vasques, P. Portugal, GLHOVE: A Framework for Uniform Coverage Monitoring using Cluster-Tree Wireless Sensor Networks, 18th IEEE International Conference on Emerging Technologies & Factory Automation, Cagliari, Italy, September, 10-13, 2013. [69] D. Macedo, I. Silva, L. Guedes, P. Portugal, F. Vasques, A framework for dependability evaluation of industrial processes, 18th IEEE International Conference on Emerging Technologies & Factory Automation, Cagliari, Italy, September, 10-13, 2013. [68] D. Costa, L. Guedes, F. Vasques, P. Portugal, Partial Energy-Efficient Hop-by-Hop Retransmission in Wireless Sensor Networks, IEEE 11th International Conference on Industrial Informatics, Bochum, Germany, July 29-31, 2013. [67] O. Valle, A. Milack, C. Montez, P. Portugal, F. Vasques, Polynomial Approximation of the Battery Discharge Function in IEEE 802.15.4 Nodes: Case Study of MicaZ, World Conference on Information Systems and Technologies, WorldCIST 2013, Olhao, Portugal, March 27-30, 2013 (Advances in Intelligent Systems and Computing, Volume 206, pp. 901-910, 2013). [66] I. Silva, L. Guedes, P. Portugal and F. Vasques. Common Cause Failure Analysis for Wireless Sensor Networks, International Conference on Computer Safety, Reliability and Security 2013. Toulouse, France, 2013. [65] D. Costa, L. Guedes Affonso, F. Vasques, P. Portugal, Delay-aware DWT-based Image Transmission in Wireless Visual Sensor Networks, 19th Brazilian Symposium on Multimedia and the Web, November 5th-8th 2013, Salvador (Bahia), Brazil. [64] D. Costa, L. Guedes Affonso, F. Vasques, P. Portugal, Adaptive Multimedia Transmission in Wireless Sensor Networks, Conferência sobre Redes de Computadores (CRC'12), Aveiro, Portugal, 2012. [63] O. Valle, A. Milack, C. Montez, P. Portugal, F. Vasques, Uma nova classe de mensagens para redes IEEE 802.15.4, XXX Simpósio Brasileiro de Telecomunicações (SBrT-2012), Brasília, Brazil, September 13-16, 2012. [62] D. Costa, L. Guedes Affonso, F. Vasques, P. Portugal, A Routing Mechanism Based on the Sensing Relevancies of Source Nodes for Time-Critical Applications in Visual Sensor Networks, IEEE Wireless Days, Dublin, Ireland, 2012, WOS:000318599000010 [61] D. Costa, L. Guedes, F. Vasques, P. Portugal, O. Valle, QoV: Assessing the Monitoring Quality in Visual Sensor Networks, Proceedings of the 8th IEEE International Conference on Wireless and Mobile Computing, Networking and Communications (WiMob 2012), Barcelona, Spain, October 8-10, 2012. [60] I. Silva, L. Affonso Guedes, P. Portugal, F, Vasques, Dependability Evaluation of WirelessHART Best Practices, Proceedings of the 17th IEEE International Conference on Emerging Technologies and Factory Automation, ETFA'2012, Kraków, Poland, September 17-21, 2012, WOS:000320333400118 [59] R. Costa, P. Portugal, F. Vasques,R. Moraes, Comparing RT-WiFi and HCCA proposals to Handle Real-Time Traffic in Open Communication Environments, Proceedings of the 17th IEEE International Conference on Emerging Technologies and Factory Automation, ETFA'2012, Kraków, Poland, September 17-21, 2012, WOS:000320333400023 [58] G. Budke, C. Montez, R. Moraes, P. Portugal, A Dynamic Communication Approach for Data Fusion in IEEE 802.15.4 Wireless Sensor Networks, Proceedings of the 17th IEEE International Conference on Emerging Technologies and Factory Automation, ETFA'2012, Kraków, Poland, September 17-21, 2012, WOS:000320333400032 [57] O. Valle, C. Montez, P. Portugal, F. Vasques, D. Costa, Expansion of the available Use Classes in IEEE 802.15.4 Networks for usage in the industrial environment, Proceedings of the 9th International Symposium on Wireless Communication Systems (WCS-12), Paris, France, August 28-31, 2012. [56] D. Costa, L. Guedes, F. Vasques, P. Portugal, O. Valle, A Semi-Reliable Energy-Efficient Retransmission Mechanism based on the Sensing Relevancies of Source Nodes for Wireless Image Sensor Networks, Proceedings of the 9th International Symposium on Wireless Communication Systems (WCS-12), Paris, France, August 28-31, 2012. [55] D. Costa, L. Guedes, F. Vasques, P. Portugal, Effect of Frame Size on Energy Consumption in Wireless Image Sensor Networks, Proceedings of the 9th IEEE International Conference on Imaging Systems and Techniques (IST-2012), Manchester, UK, July 16-17, 2012. [54] D. Costa, A. Guedes, F. Vasques, P. Portugal, Energy-Efficient Packet Relaying Based on the Sensing Relevancies of Source Nodes in Visual Sensor Networks, Proceedings of the 9th IEEE International Workshop on Factory Communication Systems, WFCS’12, Lemgo/Detmold, Germany, May 21-24, 2012. [53] R. Costa, P. Portugal, R. Moraes, F. Vasques, An Admission Control Mechanism to Handle Real-Time Traffic in IEEE 802.11 Networks in Open Communication Environments, Proceedings of the 9th IEEE International Workshop on Factory Communication Systems, WFCS’12, Lemgo/Detmold, Germany, May 21-24, 2012. [52] C. Viegas, F. Vasques, S. Sampaio, P. Portugal, P. F. Souto, Assessment of the Interference Caused by Uncontrolled Traffic Sources upon Real-Time Communication in IEEE 802.11-based Mesh Networks, Proceedings of the 9th IEEE International Workshop on Factory Communication Systems, WFCS’12, Lemgo/Detmold, Germany, May 21-24, 2012. [51] R. Marau, M. Behnam, Z. Iqbal, P. Silva, L. Almeida, P. Portugal, Controlling Multi-Switch Networks for Prompt Reconfiguration, Proceedings of the 9th IEEE International Workshop on Factory Communication Systems, WFCS’12, Lemgo/Detmold, Germany, May 21-24, 2012. [50] R. Lange, F. Vasques, P. Portugal, R. Oliveira, Guaranteeing Real-Time Message Deadlines In The FlexRay Static Segment Using a On-line Scheduling Approach, Proceedings of the 9th IEEE International Workshop on Factory Communication Systems, WFCS’12, Lemgo/Detmold, Germany, May 21-24, 2012. [49] O. Valle, A. Milack, C. Montez, P. Portugal,F. Vasques, Experimental Evaluation of Multiple Retransmission Schemes in IEEE 802.15.4Wireless Sensor Networks, Proceedings of the 9th IEEE International Workshop on Factory Communication Systems, WFCS’12, Lemgo/Detmold, Germany, May 21-24, 2012. [48] G. Budke, C. Montez, R. Moraes, P. Portugal, Uma Abordagem de Comunicação para Fusão de Dados Paralela em Redes de Sensores sem Fio IEEE 802.15.4, Proceedings of the XIII Brazilian Real-time Systems Workshop, WTR 2011, Florianópolis, Brazil, November 7-11, 2011. [47] R. Costa, P. Portugal, F. Vasques, R. Moraes, R. Custódio, RT-WiFi: um mecanismo TDMA para suportar comunicacões de tempo real em redes IEEE 802.11, Proceedings of the XXIX Simpósio Brasileiro de Telecomunicações, SbrT'11, Curitiba, Brazil, October 5-10, 2011. [46] M. Behnam, Z. Iqbal, P. Silva, R. Marau, L. Almeida, P. Portugal, Engineering and Analyzing Multi-Switch Networks with Single Point of Control, Proceedings of the 1st International Workshop on Worst-case Traversal Time (WCTT), Vienna, Austria, November 29, 2011. [45] R. Costa, P. Portugal, F. Vasques, R. Moraes, R. Custódio, A Coordination Layer to Handle Real-Time Communication in Wi-Fi Networks with Uncontrolled Traffic Sources, Proceedings of the 36th IEEE Conference on Local Computer Networks, LCN'2011, Bonn, Germany, 4-7 October, 2011, WOS:000300563800051 [44] I. Silva, L. Affonso, P. Portugal, F. Vasques, Preliminary results on the assessment of WirelessHART networks in transient fault scenarios, Proceedings of the 16th IEEE International Conference on Emerging Technologies and Factory Automation, ETFA'2011, Toulouse, France, September 5-9, 2011, WOS:000297542900183 [43] F. Yekeh, M. Pordel, L. Almeida, M. Behnam, P. Portugal, Exploring alternatives to scale FTT-SE to large networks, Proceedings of the 6th IEEE International Symposium on Industrial Embedded Systems, SIES’11, Västeras, Sweden, June 15-17, 2011. [42] T. Semprebom, V. Maryama, G. Zomer, C. Montez, F. Vasques, P. Portugal, Escalonamento Dinâmico de Compartimentos de Tempo Garantido em Redes IEEE 802.15.4, Proceedings of the 28th Brazilian Symposium on Computer Networks and Distributed Systems, SBRC'10, Gramado, Brazil, May 24-28, 2010. [41] R. Costa, P. Portugal, F. Vasques, R. Moraes, A TDMA-based Mechanism for Real-Time Communication in IEEE 802.11e Networks, Proceedings of the 15th IEEE International Conference on Emerging Technologies and Factory Automation, ETFA’10, Bilbao, Spain, September 13-16, 2010, WOS:000313616400211 [40] M. Nobre, I. Silva, L. Guedes, P. Portugal, Towards a WirelessHART module for the Ns-3 Simulator, Proceedings of the 15th IEEE International Conference on Emerging Technologies and Factory Automation, ETFA’10, Bilbao, Spain, September 13-16, 2010, WOS:000313616400015 [39] A. Pinto, B. Ferreira, C. Montez, F. Vasques, P. Portugal, VOA: Variable Offset Algorithm for the Optimization of Communication Efficiency in Wireless Sensor Networks, Proceedings of the 8th International Workshop on Factory Communication Systems, WFCS'10, Nancy, France, May 18-21, 2010. [38] Pinto, M. Camada, P. Portugal, M. Dantas, C. Montez, Self-organizing Approach for Real-time Data Fusion in Dense Wireless Sensor Networks, Proceedings of the 11th Brazilian Workshop on Real-Time and Embedded Systems, WTR'09, Recife, Brazil, May 25-29, 2009. [37] R. Moraes, F. Vasques, P. Portugal, J. Fonseca, How to use the IEEE 802.11e EDCA Protocol when Dealing with Real-Time Communication, Proceedings of the 11th Brazilian Workshop on Real-Time and Embedded Systems, WTR'09, Recife, Brazil, May 25-29, 2009. [36] R. Viegas, P. Portugal, L. Guedes, F. Vasques, A Proposal of Real-Time Publish-Subscribe Scheme Compatible with 802.11e Wireless Networks, Proceedings of the 35th Annual Conference of the IEEE Industrial Electronics Society, IECON'09, Porto, Portugal, November 2-5, 2009, WOS:000280762001012 [35] A. Pinto, M. Camada, M. Dantas, C. Montez, P. Portugal, F. Vasques, Genetic Machine Learning Algorithms in the Optimization of Communication Efficiency in Wireless Sensor Networks, Proceedings of the 35th Annual Conference of the IEEE Industrial Electronics Society, IECON'09, Porto, Portugal, November 2-5, 2009, WOS:000280762001020 [34] D. Resende, M. Santos, O. Garzedin, P. Portugal, F. Vasques, Technical and Economical Assessment for the use of Wireless Gateways in Industrial Networks, Proceedings of the 35th Annual Conference of the IEEE Industrial Electronics Society, IECON'09, Porto, Portugal, November 2-5, 2009, WOS:000280762001029 [33] T. Dutra, M. Santos, P. Portugal F. Vasques, The Impact of Control Delay upon the Performance of a DC-Motor Control: Comparison of a Centralized vs. a Network-Based Approach, Proceedings of the 35th Annual Conference of the IEEE Industrial Electronics Society, IECON'09, Porto, Portugal, November 2-5, 2009, WOS:000280762001030. [32] T. Semprebom, C. Montez, R. Moraes, F. Vasques, P. Portugal, Dynamic GTS Scheduling of Periodic Skippable Slots in IEEE 802.15.4 Wireless Sensor Networks, Proceedings of the 8th IFAC International Conference on Fieldbuses and Networks in Industrial and Embedded Systems, FET'09, Ansan, Republic of Korea, May 20-22, 2009. [31] R. Moraes, F. Vasques, P. Portugal, Uma Arquitetura em Dois Níveis para o Suporte de Comunicação de Tempo-Real em Redes CSMA, Anais do XXVI Simpósio Brasileiro de Telecomunicações, SBRT'08, Rio de Janeiro, Brazil, September 2-5, 2008. [30] R. Moraes, P. Portugal, F. Vasques, J. Fonseca, Limitations of the IEEE 802.11e EDCA Protocol when Supporting Real-Time Communication, Proceedings of the 7th IEEE International Workshop on Factory Communication Systems, WFCS’08, Dresden, Germany, May 20-23, 2008, WOS:000260667900019 [29] R. Moraes, F. Vasques, P. Portugal, A TDMA-Based Mechanism to Enforce Real-Time Behavior in WiFi Networks, Proceedings of the 7th IEEE International Workshop on Factory Communication Systems, WFCS’08, Dresden, Germany, May 20-23, 2008, WOS:000260667900017 [28] R. Moraes, F. Vasques, P. Portugal, A 2-tier Architecture to Support Real-Time Communication in CSMA-Based Networks, Proceedings of the IEEE/IFIP Networking Operations and Management Symposium, NOMS'08, April 7-11, Salvador, Bahia, Brazil, 2008, WOS:000259262400167 [27] R. Moraes, F. Vasques, P. Portugal, A TDMA-Based Mechanism that Ensures Fairness for the Real-Time Access in Heterogeneous IEEE 802.11 Wireless Lans, Proceedings of the 8th Portuguese Conference on Automatic Control, CONTROLO’2008, Vila Real, Portugal, July 21-23, 2008. [26] V. Rosset, P. Souto, P. Portugal, F. Vasques, Aplicação de Métodos Formais na Validação de Algoritmos Tolerantes a Falhas, Actas do II Encontro Nacional de Riscos, Segurança e Fiabilidade - Riscos Públicos e Industriais, Lisboa, Novembro 13-15, 2007. [25] J. Carvalho, A. Carvalho, P. Portugal, Performability Evaluation of Multi-master Profibus-DP Networks in Industrial Relevant Scenarios, Proceedings of the 7th IFAC International Conference on Fieldbuses and Networks in Industrial and Embedded Systems, FET’07, Toulouse, France, November 7-9, 2007. [24] R. Moraes, P. Portugal, S. Vitturi, F. Vasques, P. Souto, Real-Time Communication in IEEE 802.11 Networks: Timing Analysis and a Ring Management Scheme for the VTP-CSMA Architecture, Proceedings of the 32th Annual IEEE Conference on Local Computer Networks, LCN’07, Dublin, Ireland, October 15-18, 2007. [23] V. Rosset, P. Souto, P. Portugal, F. Vasques, A Reliability Evaluation of a Group Membership Protocol, Proceedings of the 26th International Conference on Computer Safety Reliability and Security, SAFECOMP'07, Lecture Notes on Computer Science, No. 4680, pp. 397-410, 2007, WOS:000250850400037 [22] R. Moraes, F. Vasques, P. Portugal, J. Fonseca, An Enhanced Traffic Separation Mechanism to Support Real-Time Communication in IEEE 802.11e Networks, Proceedings of the 24th Brazilian Symposium on Computer Networks, SBRC'06, Curitiba, Brazil, May 29 - June 2, 2006 [21] R. Moraes, F. Vasques, P. Portugal, J. Fonseca, Real-Time Communication in 802.11 Networks: The Virtual Token Passing VTP-CSMA Approach, Proceedings of the 31th Annual IEEE Conference on Local Computer Networks, LCN’06, Tampa, FL, USA, November 14-16, 2006, WOS:000243785600046 [20] R. Moraes, F. Vasques, P. Portugal, Simulation Analysis of the IEEE 802.11e EDCA Protocol for an Industrially-Relevant Real-Time Communication Scenario, Proceedings of the 11th IEEE International Conference on Emerging Technologies and Factory Automation, ETFA’06, Prague, Czech Republic, September 20-22, 2006, WOS:000246928500149 [19] R. Moraes, F. Vasques, P. Portugal, A Stochastic Petri Net Model for the Simulation Analysis of the IEEE 802.11e EDCA Communication Protocol, Proceedings of the 11th IEEE International Conference on Emerging Technologies and Factory Automation, ETFA’06, Prague, Czech Republic, September 20-22, 2006, WOS:000246928500198 [18] R. Moraes, F. Vasques, P. Portugal, J. Fonseca, A new Traffic Separation Mecha-nism (TSm) in Wireless 802.11e Networks: A simulation study, Proceedings of the 6th WSEAS International Conference on Robotics, Control and Manufacturing Technology, ROCOM'06, Hangzhou, China, April 16-18, 2006. [17] P. Portugal, A. Carvalho, F. Vasques, A Model Based on a Stochastic Petri Net Approach for Dependability Evaluation of Controller Area Networks (CAN), Proceedings of the 5th IFAC International Conference on Fieldbus Systems and their Applications, FET'05, Puebla, Mexico, November 14-15, 2005. [16] J. Carvalho, A. Carvalho, P. Portugal, Experimental Analysis of Outage Times for PROFIBUS Networks, Proceedings of the 31st Annual Conference of the IEEE Industrial Electronics Society, IECON'05, Raleight, NC, USA, November 6-10, 2005, WOS:000236873600074 [15] P. Portugal, A. Carvalho, A Simulation Model based on a Stochastic Petri Net Approach for Dependability Evaluation of PROFIBUS-DP Networks, Proceedings of the 10th IEEE International Conference on Emerging Technologies and Factory Automation, ETFA’05, Catania, Italy, September 19-22, 2005, WOS:000296356600062 [14] J. Carvalho, P. Portugal, A. Carvalho, Assessment of PROFIBUS Networks Using a Fault Injection Framework, Proceedings of the 10th IEEE International Conference on Emerging Technologies and Factory Automation, ETFA’05, Catania, Italy, September 19-22, 2005, WOS:000238575500061 [13] P. Portugal, A. Carvalho, Dependability Evaluation of Profibus-DP Networks by Using a Stochastic Petri Net Framework, Proceedings of the IEEE International Conference on Industrial Technology, ICIT'04, Hammanet, Tunisia, December 8-10, 2004, WOS:000231537500157 [12] P. Portugal, A. Carvalho, An Approach Based on Stochastic Petri Nets for Dependability Evaluation of Profibus-DP Networks, Proceedings of the 30th Annual Conference of the IEEE Industrial Electronics Society, IECON'04, Busan, South Korea, November 2-6 , 2004, WOS:000299171300073 [11] P. Portugal, A. Carvalho, A Framework for Dependability Evaluation of Fieldbus Networks, Proceedings of the 5th IEEE International Workshop on Factory Communication Systems, WFCS'04, Vienna, Austria, September 22-24, 2004, WOS:000226849900055 [10] P. Portugal, A. Carvalho, A Stochastic Petri Net Framework for Dependability Evaluation of Fieldbus Networks - A Controller Area Network (CAN) Example, Proceedings of the IEEE International Conference in Mechatronics and Robotics, MECROB'04, Aachen, Germany, September, 2004. [9] J. Carvalho, P. Portugal, A. Carvalho, A Framework for Dependability Evaluation of PROFIBUS Networks, Proceedings of the International Symposium on Industrial Electronics, ISIE´03, Rio de Janeiro, Brazil, June 9-11, 2003, WOS:000188940100053 [8] P. Portugal, A. Carvalho, Fieldbus Networks: a Dependability Evaluation, Proceedings of the ISA - Industrial In-Plant Communications Conference, Instrumentation Society of America , Atlanta, Georgia, USA, September 17-19, 2002. [7] P. Portugal, J. Carvalho, A. Carvalho, Dependability Validation Techniques for Electronic Systems, Proceedings of the 6th European Space Power Conference, ESPC'02, Porto, Portugal, May 6-10, 2002, WOS:000176274600050 [6] A. Carvalho, P. Portugal, On Dependability Evaluation of Fieldbus Networks: a Permanent Fault Analysis, Proceedings of the 27th Annual Conference of the IEEE Industrial Electronics Society, IECON '01, Denver, USA, November-December 29-02, 2001, WOS:000178186000054 [5] A. Carvalho, P. Portugal, On Dependability Evaluation of Fieldbus Networks: a Transient Fault Analysis, Proceedings of the 4th IFAC International Conference on Fieldbus Systems and their Applications, FET'01, Nancy, France, November 15-16, 2001, WOS:000180832400011 [4] A. Carvalho, M. Sousa, P. Portugal, E. Tovar, J. Oliveira, M. Alves, Towards CIM by Integrating Manufacturing Applications and Legacy Subsystems in a Heterogeneous Environment, Proceedings of the 22nd International Conference on Industrial Electronics, Control, and Instrumentation, IECON'96, Tapei, Taiwan, August 5-9, 1996, WOS:A1996BG90S00262 [3] A. Carvalho, E. Tovar, J. Oliveira, M. Alves, M. Sousa, P. Portugal, Integration of Manufacturing Applications - Overcoming Heterogeneity to Preserve Investment, Proceedings of the 2nd IEEE/ECLA/IFIP International Conference on Architectures and Design Methods for Balanced Automation Systems, Lisbon, Portugal, June, 1996, WOS:A1996BH44C00019 [2] A. Carvalho, E. Tovar, J. Oliveira, M. Alves, M. Sousa, P. Portugal, Factory Automation Using OSI Technologies: Processes Automation in a Transformers Manufacturing Plant, Proceedings of the 6th International Conference on Flexible Automation and Intelligent Manufacturing, FAIM'96, Atlanta, GA, USA, May 13-15, 1996, WOS:000078597200027 [1] P. Portugal, A. Carvalho, An Integration Tool for Instrumentation and Control Applications, Based on TCP/IP Protocol, Proceedings of the 2nd Portuguese Conference on Automatic Control, CONTROLO'96, Porto, Portugal, 1996 |