Time domain coordination for inter-cell interference reduction in LTE hierarchical cellular systems

Ssu Han Lu, Wen Pin Lai, Li-Chun Wang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

10 Scopus citations

Abstract

In this paper, we present an interference-aware slot allocation technique to improve system performance of the hierarchical picocell/macrocell system, where low-power picocells are underlying a high-power macrocell. Although a hierarchical picocell/macrocell system can improve capacity, it also poses a challenging inter-cell interference (ICI) issue. To control the ICI between pico-cells and macro-cells, one enhanced inter-cell interference coordination (eICIC) technique, called almost blank subframes (ABS), was proposed in the 3rd Generation Partnership Project (3GPP) Long-Term Evolution-Advanced (LTE-A) system. Nevertheless, the current ABS mechanism in 3GPP only defines the fixed ABS ratio, which is not very spectrum efficient and can affect the macrocellular system performance. In this paper, we propose an interference-aware ABS ratio adaptation technique to enhance the total spectrum efficiency of the hierarchical picocell/macrocell system. Compared with the current fixed ABS ratio approach, the proposed method can improve the spectral efficiency of pico-cells and macro-cells by 13% and 7% at the cell edge, respectively.

Original languageEnglish
Title of host publicationProceedings of the 2014 10th International Conference on Heterogeneous Networking for Quality, Reliability, Security and Robustness, QSHINE 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages51-55
Number of pages5
ISBN (Electronic)9781631900259
DOIs
StatePublished - 17 Oct 2014
Event10th International Conference on Heterogeneous Networking for Quality, Reliability, Security and Robustness, QSHINE 2014 - Rhodes, Greece
Duration: 18 Aug 201420 Aug 2014

Publication series

NameProceedings of the 2014 10th International Conference on Heterogeneous Networking for Quality, Reliability, Security and Robustness, QSHINE 2014

Conference

Conference10th International Conference on Heterogeneous Networking for Quality, Reliability, Security and Robustness, QSHINE 2014
CountryGreece
CityRhodes
Period18/08/1420/08/14

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