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In this paper, we present a thorough characterization of the spatio-temporal communication graph of a large-scale real-world vehicle-based Delay Tolerant Network (DTN). Unlike previous studies which either use synthetic mobility traces or data from small networks (<; 50 nodes), our analysis is based on the mobility patterns of a large scale (~ 1200 nodes) real-world public transport network. In...
In this paper, a spectrally efficient protocol for cooperative transmit diversity is proposed. By allowing multiple nodes to transmit simultaneously, relaying transmission only consumes limited bandwidth resource. To facilitate the performance analysis, the lower and upper bounds of the outage probability are first developed. Then the high signal-to-noise ratio (SNR) behavior of the cooperative protocol...
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