Universidade da Beira Interior

Displaying 1-6 of 6 results

  • White Papers // Jan 2011

    Cost-Benefit Aware Routing Protocol for Wireless Sensor Networks With Hybrid Energy Storage System

    At the eve of a new decade, when energy concerns are at the top of the research priorities, this paper presents a new cost-benefit function for Wireless Sensor Networks (WSNs) powered by harvesting energy sources. The models rely on a Hybrid Energy Storage System (HESS) that combines a Super-Capacitor (SC)...

    Provided By Universidade da Beira Interior

  • White Papers // Jul 2010

    Laboratory Performance of Wi-Fi WEP Point-to-Point Links: A Case Study

    Wireless communications using microwaves are increasingly important, e.g. Wi-Fi. Performance is a very relevant issue, resulting in more reliable and efficient communications. Laboratory measurements are made about several performance aspects of Wi-Fi (IEEE 802.11a, g) WEP point-to-point links using available access points from Enterasys Networks (RBT-4102). Through OSI levels 4...

    Provided By Universidade da Beira Interior

  • White Papers // Mar 2009

    Hybrid WiMAX and Wi-Fi Networks for the Support of b-Learning and Telemedicine

    This paper addresses the deployment of hybrid WiMAX and Wi-Fi networks for the support of always best connected telemedicine and health sciences education applications. The available services include a LMS (Learning Management System) and several structured functionalities for b-Learning. For the support of these services, fixed and wireless LANs have...

    Provided By Universidade da Beira Interior

  • White Papers // Feb 2009

    Implementation of Multi-Service IEEE 802.11e Block Acknowledgement Policies

    Optimisation of IEEE 802.11e MAC protocol performance can be performed by modifying several parameters left open in the standard, like buffer size and acknowledgement policies. In this paper, an event driven simulator was developed, and a comparison of the results between the case of standalone services and several services supported...

    Provided By Universidade da Beira Interior

  • White Papers // Jun 2008

    Application of Wireless Sensor Networks to Automobiles

    Some applications of Wireless Sensor Networks (WSNs) to the automobile are identified, and the use of Crossbow MICAz motes operating at 2.4 GHz is considered together with TinyOS support. These WSNs are conceived in order to measure, process and supply to the user diverse types of information during an automobile...

    Provided By Universidade da Beira Interior

  • White Papers // Apr 2008

    Secure Biometric Authentication With Improved Accuracy

    The authors propose a new hybrid protocol for cryptographically secure biometric authentication. The main advantages of the proposed protocol over previous solutions can be summarised as follows: Potential for much better accuracy using different types of biometric signals, including behavioral ones; and improved user privacy, since user identities are not...

    Provided By Universidade da Beira Interior

  • White Papers // Mar 2009

    Hybrid WiMAX and Wi-Fi Networks for the Support of b-Learning and Telemedicine

    This paper addresses the deployment of hybrid WiMAX and Wi-Fi networks for the support of always best connected telemedicine and health sciences education applications. The available services include a LMS (Learning Management System) and several structured functionalities for b-Learning. For the support of these services, fixed and wireless LANs have...

    Provided By Universidade da Beira Interior

  • White Papers // Jul 2010

    Laboratory Performance of Wi-Fi WEP Point-to-Point Links: A Case Study

    Wireless communications using microwaves are increasingly important, e.g. Wi-Fi. Performance is a very relevant issue, resulting in more reliable and efficient communications. Laboratory measurements are made about several performance aspects of Wi-Fi (IEEE 802.11a, g) WEP point-to-point links using available access points from Enterasys Networks (RBT-4102). Through OSI levels 4...

    Provided By Universidade da Beira Interior

  • White Papers // Jun 2008

    Application of Wireless Sensor Networks to Automobiles

    Some applications of Wireless Sensor Networks (WSNs) to the automobile are identified, and the use of Crossbow MICAz motes operating at 2.4 GHz is considered together with TinyOS support. These WSNs are conceived in order to measure, process and supply to the user diverse types of information during an automobile...

    Provided By Universidade da Beira Interior

  • White Papers // Apr 2008

    Secure Biometric Authentication With Improved Accuracy

    The authors propose a new hybrid protocol for cryptographically secure biometric authentication. The main advantages of the proposed protocol over previous solutions can be summarised as follows: Potential for much better accuracy using different types of biometric signals, including behavioral ones; and improved user privacy, since user identities are not...

    Provided By Universidade da Beira Interior

  • White Papers // Jan 2011

    Cost-Benefit Aware Routing Protocol for Wireless Sensor Networks With Hybrid Energy Storage System

    At the eve of a new decade, when energy concerns are at the top of the research priorities, this paper presents a new cost-benefit function for Wireless Sensor Networks (WSNs) powered by harvesting energy sources. The models rely on a Hybrid Energy Storage System (HESS) that combines a Super-Capacitor (SC)...

    Provided By Universidade da Beira Interior

  • White Papers // Feb 2009

    Implementation of Multi-Service IEEE 802.11e Block Acknowledgement Policies

    Optimisation of IEEE 802.11e MAC protocol performance can be performed by modifying several parameters left open in the standard, like buffer size and acknowledgement policies. In this paper, an event driven simulator was developed, and a comparison of the results between the case of standalone services and several services supported...

    Provided By Universidade da Beira Interior