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IEICE TRANSACTIONS on Communications

Optimization of Picocell Locations and Its Parameters in Heterogeneous Networks with Hotspots

Hidekazu SHIMODAIRA, Gia Khanh TRAN, Kei SAKAGUCHI, Kiyomichi ARAKI, Shoji KANEKO, Noriaki MIYAZAKI, Satoshi KONISHI, Yoji KISHI

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Summary :

In recent years, heterogeneous cellular network (HetNet) topology has been attracting much attention. HetNet, which is a network topology with low power base stations installed inside the cell range of conventional macrocells, can realize network capacity enhancement through the effects of macrocell offloading and cell shrinkage. Due to the heterogeneity nature of HetNet, network designers should carefully consider about the interference management, resource allocation, user association and cell range expansion. These issues have been well studied in recent literatures. However, one of the important problems which has not been well investigated in conventional works is the base station (BS) deployment problem in HetNet. This paper investigates the optimal pico base station deployment in heterogeneous cellular networks especially with the existence of hotspots. In this paper, pico BS locations are optimized together with other network parameters including spectrum splitting ratio and signal-to-interference-noise ratio (SINR) bias for cell range expansion to maximize the total system rate, by considering two spectrum allocation strategies, i.e. spectrum overlapping and spectrum splitting. Numerical results show that the optimized pico BS locations can improve the system rate, the average user rate and outage user rate in HetNet with hotspots.

Publication
IEICE TRANSACTIONS on Communications Vol.E96-B No.6 pp.1338-1347
Publication Date
2013/06/01
Publicized
Online ISSN
1745-1345
DOI
10.1587/transcom.E96.B.1338
Type of Manuscript
Special Section PAPER (Special Section on Heterogeneous Networks for Future Cellular Systems)
Category

Authors

Hidekazu SHIMODAIRA
  Tokyo Institute of Technology
Gia Khanh TRAN
  Tokyo Institute of Technology
Kei SAKAGUCHI
  Osaka University
Kiyomichi ARAKI
  Tokyo Institute of Technology
Shoji KANEKO
  KDDI R&D Lab.
Noriaki MIYAZAKI
  KDDI Corp.
Satoshi KONISHI
  KDDI R&D Lab.
Yoji KISHI
  KDDI Corp.

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