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Projecte llegit

Títol: Reconfigurable Medium Access Control Solutions for Resource Constrained Wireless Networks

Estudiants que han llegit aquest projecte:

Director/a: RUIZ BOQUÉ, SÍLVIA

Departament: TSC

Títol: Reconfigurable Medium Access Control Solutions for Resource Constrained Wireless Networks

Data inici oferta: 25-10-2012     Data finalització oferta: 25-10-2012


Estudis d'assignació del projecte:
    Tipus: Individual
     
    Lloc de realització: ERASMUS
     
    Paraules clau:
    WSN, MAC protocols
     
    Descripció del contingut i pla d'activitats:

    Wireless Sensor Networks (WSNs) consist of several autonomous resource constrained
    sensor nodes distributed over a geographical area. The sensor nodes can measure,
    for instance humidity, temperature or vibration. Therefore, these networks can be
    deployed in many different types of dynamic environments.
    Traditionally, Medium Access Control (MAC) protocols used in WSNs are implemented
    in a monolithic fashion with tight coupling to the underlying hardware.
    Although this approach of design and implementation can usually make full use of
    the capability of the underlying hardware, theMACsolution is static and provides satisfying
    performance only under the pre-defined conditions. However, as application
    requirements and network conditions may change, adaptability and reconfigurability
    of MAC protocols are desired.
    In this thesis, we have designed and implemented a toolchain which enables runtimeMACprotocol
    reconfiguration for WSNs. The toolchain has been implemented in
    TinyOS using component-based design and hardware independence, allowing users
    to develop MAC solutions for WSNs, execute and reconfigure them in many platforms.
    Finally, a user is able to interact with the sensor node through a user interface
    developed in Java. Furthermore, this toolchain has been enhanced by the features
    introduced in [1] to enable also simplifying the design of MAC protocols, allowing
    non-specific sensors users to implement and finally execute and reconfigure them in
    sensor nodes.
    The toolchain has been compared to monolithic implementations in terms of execution
    time and reconfiguration costs. The results show that the toolchain enables fast
    runtime reconfiguration of MAC protocols with an quantify execution time overhead.
    Our toolchain saves from 26 % up to 98 % the time needed to reconfigure a MAC
    protocol compared to the monolithic approach.
     
    Overview (resum en anglès):
    Wireless Sensor Networks (WSNs) consist of several autonomous resource constrained
    sensor nodes distributed over a geographical area. The sensor nodes can measure,
    for instance humidity, temperature or vibration. Therefore, these networks can be
    deployed in many different types of dynamic environments.
    Traditionally, Medium Access Control (MAC) protocols used in WSNs are implemented
    in a monolithic fashion with tight coupling to the underlying hardware.
    Although this approach of design and implementation can usually make full use of
    the capability of the underlying hardware, theMACsolution is static and provides satisfying
    performance only under the pre-defined conditions. However, as application
    requirements and network conditions may change, adaptability and reconfigurability
    of MAC protocols are desired.
    In this thesis, we have designed and implemented a toolchain which enables runtimeMACprotocol
    reconfiguration for WSNs. The toolchain has been implemented in
    TinyOS using component-based design and hardware independence, allowing users
    to develop MAC solutions for WSNs, execute and reconfigure them in many platforms.
    Finally, a user is able to interact with the sensor node through a user interface
    developed in Java. Furthermore, this toolchain has been enhanced by the features
    introduced in [1] to enable also simplifying the design of MAC protocols, allowing
    non-specific sensors users to implement and finally execute and reconfigure them in
    sensor nodes.
    The toolchain has been compared to monolithic implementations in terms of execution
    time and reconfiguration costs. The results show that the toolchain enables fast
    runtime reconfiguration of MAC protocols with an quantify execution time overhead.
    Our toolchain saves from 26 % up to 98 % the time needed to reconfigure a MAC
    protocol compared to the monolithic approach.

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