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Wireless Networks
Erschienen in: Wireless Networks 4/2019

16.07.2018

Two-phase downlink subcarrier allocation for multicell OFDMA systems

verfasst von: Tsung-Hsiu Chih, Szu-Lin Su, Tsung-Min Hung

Erschienen in: Wireless Networks | Ausgabe 4/2019

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Abstract

To increase spectrum efficiency, the radio resource management with frequency reuse factor = 1 is usually adopted in multi-cell orthogonal frequency division multiple access systems. Such a reuse-one strategy results in severe co-channel interference, especially penalizing mobile users near the cell border. This paper presents an effective subcarrier-assignment algorithm to mitigate the co-channel interference for multi-cell orthogonal frequency division multiple access downlink systems. The proposed algorithm consists of an initial assignment phase and a compensation phase. In the first phase, each subcarrier is assigned to mobile users with higher channel gains and lower mutual co-channel interferences. The second phase further compensates mobile users who do not get adequate resources to meet the requirement of quality of service in the first phase. System simulation results reveal that the proposed algorithm can significantly improve the number of QoS-satisfied users compared with previous used scheme.
Vorheriger Artikel Energy consumption minimization and throughput improvement in cognitive radio networks by joint optimization of detection threshold, sensing time and user selection
Nächster Artikel Spectrum pricing for cognitive radio networks with user’s stochastic distribution

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Metadaten
Titel
Two-phase downlink subcarrier allocation for multicell OFDMA systems
verfasst von
Tsung-Hsiu Chih
Szu-Lin Su
Tsung-Min Hung
Publikationsdatum
16.07.2018
Verlag
Springer US
Erschienen in
Wireless Networks / Ausgabe 4/2019
Print ISSN: 1022-0038
Elektronische ISSN: 1572-8196
DOI
https://doi.org/10.1007/s11276-018-1798-9

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