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In this paper, an adaptive resource allocation (subframe, subcarrier, bit and power allocation) in a cellular multiuser OFDMA-based relay network is considered. We have studied a margin adaptive problem that satisfies link rate requirements with minimum total base station and relay stations power for a fixed set of discrete modulation levels. This problem has been solved by various optimization techniques...
In this paper, a novel framework is proposed to integrate spectrum (resource) sharing into multihop scheduling in relay-assisted systems. This approach provides an effective solution to minimize the effect of extra resources that are required in multihop transmission. Particularly, this approach can be combined with different topologies of resource scheduling to provide better performance in terms...
Two-tier networks, comprising a conventional cellular network overlaid with shorter range hotspots (e.g. femtocells, distributed antennas, or wired relays), offer an economically viable way to improve cellular system capacity. The capacity-limiting factor in such networks is interference. The cross-tier interference between macrocells and femtocells can suffocate the capacity due to the near-far problem,...
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