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Cooperative communication approaches are being increasingly used to improve the reliability of Wireless Sensor Networks (WSNs) communication, allowing better spatial and temporal diversity. For the success of these techniques, a proper selection of the relay nodes is a crucial task. This paper proposes a new technique, named Smart, for the selection of cooperating WSN nodes according to criteria considered...
Wireless Sensor Networks (WSNs) often need to operate under strict requirements on energy consumption and be capable of self-adapting to the presence of non-trusted nodes which do not fully cooperate in the packet forwarding operation. In such an environment, the mechanism employed for the calculation of routing paths of minimum cost in terms of the number of transmissions executed for the reliable...
We assume a traditional three-node cooperative model where a source directly communicates with a sink unless in outage, in which case it reverts to a relay to facilitate communications. In contrast to prior art, however, we focus on ultra-low power wireless sensor and machine-to-machine networks, such as standardised through the emerging IEEE 802.15.4e medium access control (MAC). This requires to...
Usually wireless sensor network scenarios consist of relatively small areas where nodes are random and densely deployed. However, this is not always the case, as it happens with many time-driven applications, where nodes are either located at strategic positions or arranged according to some regular sampling patterns. In either case, the resulting inter-node distances may not be small. Thus, in order...
Lifetime-maximization is the critical concern for wireless sensor networks (WSNs). We notice that two common issues in existing routing schemes for WSNs are that (1) a path may traverse through a fixed set of sensors, draining out their energy quickly, and (2) packet retransmissions over an unreliable link of any fixed-path may consume energy significantly. In this paper, we exploit two natural advantages...
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