Interference-Aware Dynamic Channel Assignment Scheme for Enterprise Small-Cell Networks

Se-Jin KIM
Sang-Hyun BAE

IEICE TRANSACTIONS on Communications   Vol.E101-B    No.12    pp.2453-2461
Publication Date: 2018/12/01
Publicized: 2018/06/04
Online ISSN: 1745-1345
DOI: 10.1587/transcom.2018EBP3021
Type of Manuscript: PAPER
Category: Wireless Communication Technologies
OFDMA,  small-cell network,  dynamic channel assignment,  interference mitigation,  enterprise,  

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This paper proposes a novel dynamic channel assignment scheme named interference-aware dynamic channel assignment (IA-DCA) for the downlink of enterprise small-cell networks (ESNs) that employ orthogonal frequency division multiple access (OFDMA) and frequency division duplexing (FDD). In ESNs, a lot of small-cell access points (SAPs) are densely deployed in a building and thus small-cell user equipments (SUEs) have more serious co-tier interference from neighbor SAPs than the conventional small-cell network. Therefore, in the proposed IA-DCA scheme, a local gateway (LGW) dynamically assigns different numbers of subchannel groups to SUEs through their serving SAPs according to the given traffic load and interference information. Through simulation results, we show that the proposed IA-DCA scheme outperforms other dynamic channel assignment schemes based on graph coloring algorithm in terms of the mean SUE capacity, fairness, and mean SAP channel utilization.