Joint user scheduling and interference alignment beamforming in heterogeneous wireless networks

Yu Fan Chen, Li-Chun Wang, Wern Ho Sheen

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

2 Scopus citations

Abstract

Small cell networks are the key to the success of the next generation wireless systems because of the potential huge capacity gain, but pose many challenges on managing the inter-cell interference from huge number of small cells and that from macrocells. Recently, an interesting technique, called interference alignment (IA), was proposed to align the mutual inter-cell interference (ICI) in the same sub-space by designing the beamforming vector among the coordinated cells. Because of the reduced ICI, the system capacity of an IA system can be improved. Nevertheless, the methods of selecting a group of users for the IA system has been rarely seen in the literature, especially in the macrocell/small cells hierarchical overlaying networks. In this paper, we investigate the effects of pairing users and base stations in an IA-based hierarchical overlaying macrocell/small cells networks. Furthermore, we design an IA scheme that can not only reduce the inter-cell interference among small cells, but also avoid interfering with the overlaying macrocell. Comparing to the conventional IA scheme based on the random pairing for users and base stations, the sum rate of the proposed joint user scheduling and IA beamforming design is 30% and 64.5% improved for the cell edge users with the SNR-based and SINR-based pairing for the users and base stations.

Original languageEnglish
Title of host publication2014 IEEE 25th Annual International Symposium on Personal, Indoor, and Mobile Radio Communication, PIMRC 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1083-1087
Number of pages5
ISBN (Electronic)9781479949120
DOIs
StatePublished - 25 Jun 2014
Event2014 25th IEEE Annual International Symposium on Personal, Indoor, and Mobile Radio Communication, IEEE PIMRC 2014 - Washington, United States
Duration: 2 Sep 20145 Sep 2014

Publication series

NameIEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC
Volume2014-June

Conference

Conference2014 25th IEEE Annual International Symposium on Personal, Indoor, and Mobile Radio Communication, IEEE PIMRC 2014
CountryUnited States
CityWashington
Period2/09/145/09/14

Keywords

  • Interference alignment
  • interference management
  • user scheduling and heterogeneous network

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    Chen, Y. F., Wang, L-C., & Sheen, W. H. (2014). Joint user scheduling and interference alignment beamforming in heterogeneous wireless networks. In 2014 IEEE 25th Annual International Symposium on Personal, Indoor, and Mobile Radio Communication, PIMRC 2014 (pp. 1083-1087). [7136328] (IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC; Vol. 2014-June). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/PIMRC.2014.7136328