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MIMO, OFDMA and cooperative relaying are the key technologies in future wireless communication systems. However, under the usage of these technologies, resource allocation becomes a more crucial and challenging task. In multi-user MIMO-OFDMA relay-enhanced cellular networks, we formulate the optimal instantaneous resource allocation problem including user group selection, path selection, power allocation,...
The deployment of relay stations in OFDMA cellular networks is a promising solution to provide ubiquitous high-data-rate coverage. However, it makes the resource allocation a more crucial and challenging task. In OFDMA relay-enhanced cellular networks, we formulate the optimal instantaneous resource allocation problem including path selection, power allocation and subchannel scheduling to achieve...
The cooperative selection diversity (CSD) scheme which dynamically selects the best transmission scheme between decode-and-forward relaying and direct transmission outperforms the other complex cooperative diversity schemes in terms of throughput and implementation complexity. In this paper, we formulate the optimal resource allocation problem with a fairness constraint in the downlink of OFDMA relay-enhanced...
We propose a efficient semi-distributed resource allocation scheme for OFDMA relay-enhanced downlink systems. Firstly, an adaptive subframe partitioning (ASP) algorithm that considers user's queue length and achievable data rate is used by base station to assign resources to relay stations. Regarding the slot allocation, we suggest two ways to extend conventional single-hop scheduling algorithms into...
OFDMA-based relay-enhanced cellular systems have been proposed as a promising solution for the next-generation wireless communications. The deployment of relay stations (RS) in cellular networks makes resource scheduling a more crucial and challenging task. In this paper, a novel centralized scheduling scheme called centralized scheduling with void filling (CS-VF) is proposed for two-hop relay-enhanced...
The integration of multihop capabilities in orthogonal frequency-division multiple access (OFDMA) cellular systems through the deployment of relay stations is believed to be one of the promising solutions for the next-generation wireless communications. In this paper, four fixed resource allocation schemes with different partition and reuse factors are discussed. They are 7-part partitioning (PF7),...
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