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Maximum Achievement Rate Allocation Algorithm for Downlink Multi-User OFDMA Systems

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Abstract

In multi-user OFDMA systems, adaptive resource allocation has been identified as one of the key technologies to have more flexibility and higher efficiency. Several adaptive subcarrier allocation algorithms with the objective to maximize spectral efficiency or fairness have been proposed. However, quality of service (QoS) requirement of each user may not be supported. Some algorithms considering user’s QoS requirement have been introduced, but they do not consider the case that every user’s QoS requirement cannot be guaranteed with limited resources. In this paper, we propose a maximum achievement rate allocation (MARA) algorithm as a new adaptive resource allocation algorithm. The proposed MARA algorithm has a goal to improve overall throughput while maximizing achievement rate, i.e., maximize the number of users meeting QoS requirements. In addition, we investigate that MARA is more effective when fractional frequency reuse (FFR) is adopted as a frequency partitioning scheme. Simulation results show that the MARA algorithm improves the achievement rate as well as overall throughput. Moreover, further performance gains are achieved when FFR is adopted.

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Authors and Affiliations

  1. College of Information and Communication Engineering, Sungkyunkwan University, Suwon, 440-746, Republic of Korea

    Tae-Kyeong Cho, Chang-Yeong Oh & Tae-Jin Lee

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  1. Tae-Kyeong Cho
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  2. Chang-Yeong Oh
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  3. Tae-Jin Lee
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Correspondence to Tae-Jin Lee.

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Cho, TK., Oh, CY. & Lee, TJ. Maximum Achievement Rate Allocation Algorithm for Downlink Multi-User OFDMA Systems. Wireless Pers Commun 70, 1425–1442 (2013). https://doi.org/10.1007/s11277-012-0757-5

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  • DOI: https://doi.org/10.1007/s11277-012-0757-5

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