Graph-Based Multicell Scheduling in OFDMA-Based Small Cell Networks
Pateromichelakis, E, Shariat, M, Quddus, A and Tafazolli, R (2014) Graph-Based Multicell Scheduling in OFDMA-Based Small Cell Networks IEEE Access, 2. pp. 897-908.
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This paper proposes a novel graph-based multicell scheduling framework to efficiently mitigate downlink intercell interference in OFDMA-based small cell networks. We define a graph-based optimization framework based on interference condition between any two users in the network assuming they are served on similar resources. Furthermore, we prove that the proposed framework obtains a tight lower bound for conventional weighted sum-rate maximization problem in practical scenarios. Thereafter, we decompose the optimization problem into dynamic graph-partitioning-based subproblems across different subchannels and provide an optimal solution using branch-and-cut approach. Subsequently, due to high complexity of the solution, we propose heuristic algorithms that display near optimal performance. At the final stage, we apply cluster-based resource allocation per subchannel to find candidate users with maximum total weighted sum-rate. A case study on networked small cells is also presented with simulation results showing a significant improvement over the state-of-the-art multicell scheduling benchmarks in terms of outage probability as well as average cell throughput.
|Subjects :||Electronic Engineering|
|Divisions :||Faculty of Engineering and Physical Sciences > Electronic Engineering|
|Date :||21 August 2014|
|Identification Number :||10.1109/ACCESS.2014.2350556|
|Copyright Disclaimer :||© 2014 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.|
|Depositing User :||Symplectic Elements|
|Date Deposited :||08 Jul 2016 10:32|
|Last Modified :||08 Jul 2016 10:33|
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