Arquiteturas Cross-layer para Redes de Sensores sem Fio

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

The majority of proposed communications protocols in sensor networks thrive on the collaborative nature of sensor nodes to optimize a number of important operational aspects such as routing, energy consumption, load balancing and traffic optimization. Common to all the proposed solutions are the fact of these networks also are projected on the traditional layered protocol architecture. In other words, the majority of these protocols of communication individually are developed for the different layers of network. While these protocols may achieve very high performance in terms of the metrics related to each of these individual layers, they are not jointly optimized to maximize the overall network performance while minimizing the energy expenditure. Considering the scarce resources of sensor networks, the integrated design of networking layers, i.e., the crosslayer design, stands as a promising alternative to inefficient traditional layered protocol architecture. Knowing the scarcity of their resources and the importance of optimizing these, this work looks at a cross-layer approach for achieving better resource usage. A new network architecture known as AONA - Aspect-Oriented Network Architecture is designed and evaluated. AONA supports direct communications among the layers when working towards a common interest. A new abstract building mechanism is introduced and is referred to as aspect. It allows the layers sharing their information to attend their interests spread across different layers while also maintaining the gains obtained from modular design. Examples of such cross-layer interests include energy consumption, security, resilience and other Quality of Service requirements. The thesis validates AONA using as proof of concept the MAC and routing layers integrated design in the special case of sensor networks. The results show that such paradigm increases node life expectancy and improves its performance. In addition, AONA may offer some important guidelines and insights into the design of next generation architectures where issues such as extensibility, adaptation, reuse and reconfiguration are enforced

ASSUNTO(S)

arquitetura de redes de computadores ciencia da computacao redes de sensores sem fio computer network architecture, wireless sensor networks, crosslayer communication, and aspect-oriented software development. comunicaÃÃo cross-layer e desenvolvimento de software orientado a aspectos

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