Base station activation and linear transceiver design for optimal resource management in heterogeneous networks

Wei Cheng Liao, Mingyi Hong, Ya Feng Liu, Zhi Quan Luo

Research output: Contribution to journalArticlepeer-review

63 Scopus citations

Abstract

In a densely deployed heterogeneous network (HetNet), the number of pico/micro base stations (BS) can be comparable with the number of the users. To reduce the operational overhead of the HetNet, proper identification of the set of serving BSs becomes an important design issue. In this work, we show that by jointly optimizing the transceivers and determining the active set of BSs, high system resource utilization can be achieved with only a small number of BSs. In particular, we provide formulations and efficient algorithms for such joint optimization problem, under the following two common design criteria: i) minimization of the total power consumption at the BSs, and ii) maximization of the system spectrum efficiency. In both cases, we introduce a nonsmooth regularizer to facilitate the activation of the most appropriate BSs. We illustrate the efficiency and the efficacy of the proposed algorithms via extensive numerical simulations.

Original languageEnglish (US)
Article number6847222
Pages (from-to)3939-3952
Number of pages14
JournalIEEE Transactions on Signal Processing
Volume62
Issue number15
DOIs
StatePublished - Aug 1 2014

Keywords

  • Alternating Direction Method of Multipliers (ADMM)
  • LASSO
  • base station selection/clustering
  • heterogeneous networks
  • weighted MMSE algorithm

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