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Reuse Partitioning for Throughput and Fairness Improvement in OFDMA Based Relay System  

Shim, Min-Kyu (Department of Electronic Engineering, Sogang University)
Choi, Ho-Young (Department of Electronic Engineering, Sogang University)
Hong, Dae-Hyoung (Department of Electronic Engineering, Sogang University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.44, no.9, 2007 , pp. 17-24 More about this Journal
Abstract
In this paper, we propose the sub-cell reuse partitioning among relays as an efficient resource reuse scheme in the relay-based OFDMA systems. If the frequency resource is reused among relays aggressively, we can increase the cell throughput. However, the interferences due to the frequency reuse may cause the fairness decrease due to the SINR degradation especially at the edge of RS sub-cells. In this paper, to make the cell throughput and fairness performance improved at the same time, we propose a sub-cell reuse partitioning scheme that divides a relay sub-cell into inner zone for aggressive reuse and outer zone for sparse reuse. The performance of the proposed scheme has been analyzed by computer simulation. We also applied a scheduling algorithm that can work together with the proposed sub-cell reuse partitioning scheme. Simulation results show that the proposed scheme can improve both the throughput and the fairness performances. In particular, when the scheduling is applied for the improvement of fairness, it is shown that the throughput performance can be enhanced more efficiently by the proposed scheme.
Keywords
Relay; Multi-hop; Frequency reuse; Reuse partitioning; Fairness;
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