Convex Optimization
Relay selection and power allocation in cooperative cellular networks
IEEE Transactions on Wireless Communications
Opportunistic cooperation by dynamic resource allocation
IEEE Transactions on Wireless Communications
Capacity theorems for the relay channel
IEEE Transactions on Information Theory
Towards an information theory of large networks: an achievable rate region
IEEE Transactions on Information Theory
Distributed space-time-coded protocols for exploiting cooperative diversity in wireless networks
IEEE Transactions on Information Theory
Cooperative diversity in wireless networks: Efficient protocols and outage behavior
IEEE Transactions on Information Theory
Resource Allocation for Wireless Fading Relay Channels: Max-Min Solution
IEEE Transactions on Information Theory
Multiuser OFDM with adaptive subcarrier, bit, and power allocation
IEEE Journal on Selected Areas in Communications
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A single base station communicating with multiple users over orthogonal channels being assisted by multiple relays is considered in this paper. Recent works have suggested that a single relaying environment is the best relaying choice in such a scenario. However, in a multiuser setting, optimal relay assignment is a combinatorial problem. Previous work, largely deals with mesh networks, addressing the problem of selection of relay, assigned to the various users using the concept of beaconing, followed by power allocation through convex optimisation. However, this increases system overhead, thereby reducing the user throughput. In this paper, we propose a unified system model, using realistic channels that not only demonstrates the efficacy of the idea proposed, but also resolves the problem of low spectral efficiency. The proposed idea uses a beacon signal only for deciding whether to use a relay or not, thereby leaving the decision of power allocation and relay assignment to the users in need, via convex optimisation.