An Interference Reduction Strategy for TDDOFDMA Cellular Systems

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Provided by: World Academic Union
Topic: Mobility
Format: PDF
Down Link/Up Link (DL/UL) Time Slot Allocation (TSA) in Time Division Duplex (TDD) systems is generally uniform for all the cells. This TSA however is not efficient in case of different traffic asymmetry ratios in different cells. The authors first propose a new 3- coordinate architecture to identify cells in an Orthogonal Frequency Division Multiple Access (OFDMA) system where each cell is divided into three sectors. Then, this coordinate system is used to derive a TSA for symmetric traffic. Mathematical analysis and simulations are used to show that the proposed TSA outperforms the traditional all uniform type of TSA in terms of total intercellular interference, even under uniform symmetrical traffic.
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