Resource allocation and scheduling in multi-cell OFDMA systems with decode-and-forward relaying
Derrick Wing Kwan Ng , Schober R (2011)
Publication Type: Journal article
Publication year: 2011
Journal
Book Volume: 10
Pages Range: 2246-2258
Article Number: 5771015
Journal Issue: 7
DOI: 10.1109/TWC.2011.042211.101183
Abstract
In this paper, we formulate resource allocation and scheduling for multi-cell orthogonal frequency division multiple access (OFDMA) systems with half-duplex decode-and-forward (DF) relaying as a joint optimization problem taking into account multi-cell interference and heterogeneous user data rate requirements. For efficient multi-cell interference mitigation, we incorporate a time slot allocation strategy into the problem formulation. We transform the resulting non-convex and combinatorial optimization problem into a standard convex problem by imposing an interference temperature constraint, which yields a lower bound for the original problem. Subsequently, the transformed optimization problem is solved by dual decomposition and a semi-distributed iterative resource allocation algorithm with closed-form power and subcarrier allocation policies is derived to maximize the average weighted system throughput (bit/s/Hz/base station). Simulation results illustrate that our proposed semi-distributed algorithm achieves practically the same performance as the centralized optimal solution of the original non-convex problem and provides a substantial performance gain compared to single-cell resource allocation and scheduling schemes. © 2011 IEEE.
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APA:
Derrick Wing Kwan Ng, ., & Schober, R. (2011). Resource allocation and scheduling in multi-cell OFDMA systems with decode-and-forward relaying. IEEE Transactions on Wireless Communications, 10(7), 2246-2258. https://doi.org/10.1109/TWC.2011.042211.101183
MLA:
Derrick Wing Kwan Ng, , and Robert Schober. "Resource allocation and scheduling in multi-cell OFDMA systems with decode-and-forward relaying." IEEE Transactions on Wireless Communications 10.7 (2011): 2246-2258.
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