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In recent times, the study of complex network systems, for example communication networks such as the Internet, Smart Grids or Social Networks, have received significant attention. While newly emerging data sets in these domains now allow for a broad quantitative exploration and empirical validation of theoretical models towards a better understanding of complex networks, the enormous size of complex...
Cloud computing has become a popular high performance computing model to provide services over the Web. Meanwhile, enterprise cloud applications are attracting more research attention, which consists of a large scale of inter-connected computing nodes and virtualized computers distributed over multiple enterprise domains. Driven by the resource demand and less cooperation among applications, some...
This paper presents an empirical study of the effects of the channel occupation on the consumption of actual IEEE 802.15.4/ZigBee motes. The study is focused on the current demanded by a sensor node in a simple beaconless star topology when the CSMA contention algorithm introduces idle times in the activity of the radio transceiver. For this purpose, the developed testbed permits to define the probability...
We present an algorithm for bandwidth allocation for delay-sensitive traffic in multi-hop wireless sensor networks. Our solution considers both periodic as well as aperiodic real-time traffic in an unified manner. We also present a distributed MAC protocol that conforms to the bandwidth allocation and thus satisfies the latency requirements of realtime traffic. Additionally, the protocol provides...
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