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Wireless sensor networks are composed of energy-constrained nodes. Therefore, it is crucial to design routing algorithms that optimize the energy usage of nodes. Aimed at maximizing the network lifetime, we introduced an optimal routing algorithm based on the max-min model. In this algorithm, the data transmission matrix is defined and the relaying node selection mechanism is designed to avoid possible...
Recently, structured P2P (Peer-to-Peer) system has become more and more popular. However, P2P systems' large scale and high dynamics have brought a great challenge to data availability and accessing performance. Redundancy techniques are used to solve these problems. However, in structured P2P systems, due to the consistent hash, the overlay network could not match underlying physical network well...
The paper presents a hierarchical organization of two storage redundancy schemes to improve data availability caused by churn in structured overlay networks. To mask or hide the high churn from the portion of short-lived but frequent churn peers and permanent failure peers, we use replication among the nodes in a certain interval that can be considered as a virtual node. Then a set of virtual nodes...
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