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Cellular networks are expected to change to Multi-hop Cellular Networks (MCNs). While a mobile station and the base station have a direct link in a conventional cellular network, in MCN, mobile stations with unsatisfactory path to the base station, could instead relay their data through other mobile stations with better channel conditions. This can improve(More)
We study the problem of optimizing the symbol error probability (SEP) performance of cluster-based cooperative wireless sensor networks (WSNs). We propose that to achieve the minimum SEP at the destination, a joint optimization of power allocation and relay selection should be accomplished. To this aim, we reformulate the SEP performance of a simple(More)
Quantum cryptography is an emerging technology in which two parties may simultaneously generate shared, secret cryptographic key material using the transmission of quantum states of light. Key distribution is the problem of classical cryptography algorithm, and tends to provide safe channel to transport key. Quantum cryptography could distribute key in(More)
In this paper, we present a framework for resource allocations for multicast device-to-device (D2D) communications underlaying a cellular network. The objective is to maximize the sum throughput of active cellular users (CUs) and feasible D2D groups in a cell, while meeting a certain signal-to-interference-plus-noise ratio (SINR) constraint for both the CUs(More)
In recent years, there has been a strong interest in incorporating multihop relaying strategies in cellular systems to develop Multihop Cellular Networks (MCNs). This increases the network capacity, improves its coverage and reduces transmit power levels. In this paper, a joint relay selection and resource allocation algorithm is proposed to maximize the(More)