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      • TIM: TDD Remote Interference Management Solution

        Okyoung Choi(최옥영),Myoung-Kwang Byun(변명광),Seijoon Shim(심세준) 한국통신학회 2021 한국통신학회 학술대회논문집 Vol.2021 No.2

        In time-division duplex (TDD) cellular systems, downlink (DL) and uplink (UL) are separated by a guard period that accommodates signal propagation delay from adjacent cells. However, certain atmospheric changes form an abnormal propagation condition for signals to travel much farther than the maximum propagation delay that the TDD system can absorb within the guard period. The DL-to-UL crosslink interference from remote TDD cells causes significant performance impacts. Unlike the typical inter-cell interference managements coping with a few adjacent cells, the TDD remote interference requires a very complicated mitigation since the crosslink interference should be managed over massive TDD cells in a wide area. In this paper, we propose a novel TDD remote interference management solution, so-called TIM (TDD Interference Manager), which periodically identifies aggressor-victim associations and adaptively mitigates interference among nationwide TDD cells. The proposed solution has been shown to effectively manage the TDD remote interference through successful commercial operations in massive LTE networks.

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