Cooperative Fractional Frequency Reuse Based on Partial Connectivity Among Clients

Geirhofer, S.; Oyman, Özgür

doi:10.1109/glocom.2008.ecp.796

Cited by 1 publication

(1 citation statement)

References 8 publications

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“…While the whole frequency bandwidth can be assigned to cell‐center users during the first part of the subframe, only a fraction of the bandwidth is assigned to cell‐edge users during the second part of the subframe, which may not fully utilize the bandwidth. In References 12 and 13, the client‐centric FFR based on user cooperation has been proposed. In this decentralized FFR, users at the cell‐edge in a system have cooperative connectivity among nearby users to sense their environments and exchange their channel quality indicator (CQI) with the objective of finding viable sub‐channel allocations.…”

Section: Introductionmentioning

confidence: 99%

Sequential frequency reuse with power control for OFDMA systems

Choi

Lim

Lee

2011

Wireless Communications

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Orthogonal frequency division multiple access (OFDMA) is a promising technique for high data rate communications in future cellular systems. Since frequency resources are universally reused in every cell in a system, a typical OFDMA system tries to maximize the spectral efficiency. Users located near the cell-edge tend to have the weakest signal strength. So they might experience severe inter-cell interferences (ICIs). In this paper, we propose a sequential frequency reuse (SqFR) that reduces ICIs by a sequential sub-channel allocation. By giving more power to sub-carriers allocated to cell-edge users, our SqFR significantly enhances the performance of cell-edge users. The performance of the proposed SqFR is investigated via the analysis and simulations. Simulation results show that proposed SqFR improves the performance of cell-edge users in an OFDMA system under both homogeneous and heterogeneous traffic conditions. In References [9--11], FFR for Mobile WiMAX is considered, which suggests time division of the available total bandwidth with different FRFs, i.e., cell-edge bandwidth with FRF of 3 and cell-center bandwidth with FRF of 1. So, downlink subframe is split into two parts: one for

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Section: Introductionmentioning

confidence: 99%