| Abstract |
In the last years technology managed to miniaturize and oΜer in aΜordable prices complex electronic devices. The devices range from sophisticatedwatches, to mobile phones, to palm sized computers, to digital media players. We Νnd ourselves carrying and using an increasing number of such personal devices in our everyday life. While the number of personal devices we carry increases, they remain isolated from each other. The emergence of cheap, short-range, energy-efficient radio technologies enables the personal devices to overcome the isolation barrier, thus enabling distributed operation, sharing of resources and seamless interaction with other devices in their area. The network consisting of the personal devices of a user, over which they communicate, is called personal area network(PAN). The most prominent radio technology for the implementation of personal area networks is Bluetooth. Bluetooth networks are structured as small star-shaped, centrally controlled formations called piconets. It is widely acknowledged that for the realization of personal area networks using Bluetooth, we need to extend piconets to more complex constructs, called scatternets. In this work we outline the characteristics of personal area networks regarding formation, traΟc patterns and failure model. We then propose how these characteristics can be exploited to improve performance of a ring-shaped scatternet. We prove with experiments that our proposal is superior to a similar ring-shaped scatternet that ignores the features of personal area networks, doubling the aggregate throughput while the load increases. We also show that our proposal compares favourably to a piconet based formation.
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Αρχιτεκτονικές δικτύων προσωπικής περιοχής βασισμένων στην τεχνολογία Bluetooth
