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Many applications of sensor networks collect massive data in a coordinated approach, such as monitoring volcanoes, oceans and forests. We propose, therefore, two protocols at the network stack to enable multiple frequency communication. MultiFCTP extends the state-of-the-art CTP to route packets using multiples frequencies. FlushMF is a transport protocol that extends Flush by supporting multiple...
In this paper, we study how to select a high performance end-to-end path in multi-hop cognitive wireless networks. Due to the time-varying spectrums and undetermined activity of primary users, path selection in cognitive wireless networks is much harder than that of traditional wireless networks. To attack this problem, we propose a novel routing metric, called WHAT (Weighted Hop, spectrum-Awareness,...
In multihop ad hoc networks over 802.11, the real bandwidth-delay product (BDP) cannot reach a value as large as in wired networks due to contention through wireless shared channels. As a result, conventional congestion-control algorithms cause an overshooting window problem and result in poor throughput in ad hoc networks. In this paper, we split the real round-trip time (RTT) into two parts: 1)...
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