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Energy efficient and quality of service aware resource block allocation in OFDMA systems
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Sabagh, Mohammad R., Dianati, Mehrdad, Mehrjoo, Mehri and Tafazolli, Rahim (2015) Energy efficient and quality of service aware resource block allocation in OFDMA systems. IET Communications, 9 (12). pp. 1479-1492. doi:10.1049/iet-com.2014.0782 ISSN 1751-8628.
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Official URL: http://dx.doi.org/10.1049/iet-com.2014.0782
Abstract
This study investigates energy efficient allocation of radio resource blocks in orthogonal frequency division multiple access (OFDMA) systems while considering the status of the users' data buffers to reduce packet dropping rate by the downlink scheduler. The proposed scheme exploits the fluctuations of traffic load to efficiently schedule users' data packets by reducing the overall energy consumption of the system whenever the status of data buffers permits. From information theory point of view, the proposed scheme exploits the fundamental trade-off between energy efficiency and spectral efficiency to perform scheduling. First, the problem is formulated as an optimisation problem and then a novel solution, based on dynamic programming, is applied. By comparing the analytical solution with the ones obtained by exhaustive search, it is demonstrated that the proposed scheme is close to the optimal solution, with low computational complexity. In addition, comprehensive simulations are conducted to evaluate the performance of the suggested algorithm. Both analytical and simulation results demonstrate the superiority of the proposed algorithm compared with the well-known benchmark schemes in terms of energy efficiency and packet dropping rate.
Item Type: | Journal Article | ||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | ||||||
Journal or Publication Title: | IET Communications | ||||||
Publisher: | The Institution of Engineering and Technology | ||||||
ISSN: | 1751-8628 | ||||||
Official Date: | 2 August 2015 | ||||||
Dates: |
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Volume: | 9 | ||||||
Number: | 12 | ||||||
Page Range: | pp. 1479-1492 | ||||||
DOI: | 10.1049/iet-com.2014.0782 | ||||||
Status: | Peer Reviewed | ||||||
Publication Status: | Published | ||||||
Access rights to Published version: | Restricted or Subscription Access |
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