Cooperative hierarchical cellular systems in LTE-a networks

Ssu Han Lu, Li-Chun Wang, Tsung Ting Chiang, Chen Hsiao Chou

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


In this paper, we investigate the performance of hierarchical base station cooperation (HBSC) techniques in macrocell/microcell heterogeneous networks for the Third-Generation Partnership Project Long-Term Evolution-Advanced (LTE-A) system. HBSC techniques aim at reducing the cochannel interference between a macrocell and a group of microcells by coordinating the transmissions of distributed antennas in the cell coverage area. We find that joint intra-and intersite cooperation will significantly reduce the intercell interference. Compared with the case without joint intrasite/intersite cooperation, we demonstrate that HBSC in the conventional pentagonal cell architecture can improve spectrum efficiency by 65% at the cell edge. When the narrow-beam trisector cell architecture is considered, the spectrum efficiency can be further improved by 16.42% at the cell edge.

Original languageEnglish
Article number6719476
Pages (from-to)766-774
Number of pages9
JournalIEEE Systems Journal
Issue number3
StatePublished - 1 Sep 2015


  • Heterogeneous network
  • hierarchical base station cooperation (HBSC)
  • interference management

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