An adaptive ARQ–HARQ interworking scheme in WiMAX systems |
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| Authors: | Joo-Young Baek Young-Joo Suh |
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| Affiliation: | 1. University of Athens, Athens, Greece;2. Huawei ERC, Munich, Germany;2. Department of Medicine, University of Ulsan College of Medicine, Seoul 138-736, South Korea;3. School of Mechanical Engineering, Gwangju Institute of Science and Technology, Gwangju 61005, South Korea;4. Department of Biomedical Science and Engineering, Institute of Integrated Technology (IIT), Gwangju, Institute of Science and Technology, Gwangju 61005, South Korea;5. Discovery and Analytic Solution, PerkinElmer Korea, Seoul 08380, South Korea;11. Biomedical Engineering Research Center, Asan Institute for Life Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul 138-736, South Korea;12. Department of Gastroenterology, Asan Medical Center, University of Ulsan College of Medicine, Seoul 138-736, South Korea;8. Department of Gastroenterology and Convergence Medicine, University of Ulsan College of Medicine, Seoul 138-736, South Korea |
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| Abstract: | For reliable data transmissions, WiMAX systems support automatic repeat query (ARQ) that operates at the upper MAC and hybrid automatic repeat query (HARQ) that operates at the lower MAC and PHY. ARQ and HARQ schemes have their own weakness that results in low throughput and high delay in WiMAX systems. Although ARQ and HARQ schemes can complement with each other, they operate independently. Some studies focus on the benefits of the interaction between ARQ and HARQ schemes, but these studies have limitations. In this paper, we propose an adaptive ARQ and HARQ interworking scheme to provide reliable transmissions without performance degradation in WiMAX systems. The proposed scheme has five features that are designed to solve the weaknesses of the ARQ and HARQ schemes. We compare the proposed scheme with existing schemes that utilize the ARQ and HARQ interaction through simulations, and the simulation results show that the proposed scheme shows improved performance over existing schemes. |
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