Cell Selection and Resource Allocation for Interference Management in a Macro-Picocell Heterogeneous Network

Sangmi Moon, Bora Kim, Saransh Malik, Cheolwoo You, Huaping Liu, Jeong Ho Kim, Jihyung Kim, Intae Hwang

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

A heterogeneous network (HetNet) based on the long-term evolution advanced standard has been developed to improve the system performance; in this HetNet, macrocells and low-power nodes, such as picocells, coexist. Further, cell range expansion has been introduced to encourage data offloading in a HetNet. In this paper, we propose a cell selection scheme based on the signal-to-interference-plus-noise ratio to achieve an optimal offloading effect. We also propose a resource allocation scheme in the frequency and time domains, to reduce interference in a HetNet. In the frequency domain, the macrocells allocate a frequency band by using soft frequency reuse, and the picocells choose the sub-bands that are not used in the macrocell sector, to avoid interference. In addition, we found that it was difficult to allocate a limited frequency resource. Therefore, the cross-tier interference can be managed by using an almost blank subframe (ABS) with a flexible ABS ratio, to improve spectrum efficiency in the time domain. The simulation results show that the proposed schemes can improve the spectrum efficiency of both the macro-user equipment and the pico-user equipment, as well as improve the overall UE performance.

Original languageEnglish
Pages (from-to)1887-1901
Number of pages15
JournalWireless Personal Communications
Volume83
Issue number3
DOIs
StatePublished - 29 Aug 2015

Keywords

  • ABS
  • Cell selection
  • CRE
  • HetNet
  • Interference
  • SFR
  • SINR

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