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Open AccessArticle

Dynamic Clustering and Coordinated User Scheduling for Cooperative Interference Cancellation on Ultra-High Density Distributed Antenna Systems

Graduate School of Engineering, Chiba University, Chiba 263-8522, Japan
Entropy 2018, 20(8), 616; https://doi.org/10.3390/e20080616
Received: 31 July 2018 / Revised: 16 August 2018 / Accepted: 18 August 2018 / Published: 19 August 2018
(This article belongs to the Special Issue Information Theory and 5G Technologies)
This paper proposes dynamic clustering and user scheduling for previously conceived inter-cluster interference cancellation scheme on ultra-high density distributed antenna system (UHD-DAS). UHD-DAS is composed of one central unit (CU) and densely deployed remote radio units (RUs) serving as small cell access points. It can enhance spatial spectral efficiency by alleviating traffic load imposed per radio unit; however, intenser small cell deployment revives the inter-cell interference (ICI) problem. Cell clustering, cooperation of multiple RUs, can mitigate ICI partially, whereas inter-cluster interference (ICLI) still limits its possible capacity. Simplified ICLI cancellation based on localized RU cooperation was previously proposed to mitigate interference globally. The resolved issue is that it required frequency reuse distance to fully obtain its interference cancellation ability. This paper introduces dynamic clustering with coordinated user scheduling to ensure reuse distance without extra frequency reuse. Joint dynamic clustering and ICLI cancellation can effectively work and almost reaches ideal performance as full cooperative spatial multiplexing transmission. View Full-Text
Keywords: distributed antenna; cell clustering; cooperation; large scale; multiuser MIMO distributed antenna; cell clustering; cooperation; large scale; multiuser MIMO
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Maruta, K. Dynamic Clustering and Coordinated User Scheduling for Cooperative Interference Cancellation on Ultra-High Density Distributed Antenna Systems. Entropy 2018, 20, 616.

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