Performance of off-grid small cells with non-uniform deployment in Two-Tier HetNet

Kuang Hao Liu, Ting Yi Yu

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


The dense deployment of low-power small-cell base stations (SBSs) can complement existing macro base stations (MBSs) to address the $1000\times $ mobile data challenge. Considering the low power rating of SBSs, it may be possible to supply them with renewable energy, providing an appealing alternative for hyper-dense deployment of small cells. Since renewable energy is weak and intermittent, off-grid SBSs may not be always active. This raises the concern as to whether they can be a real solution. To assess the performance of a heterogeneous network (HetNet) with two tiers, including the traditional MBSs supplied by grid power and off-grid SBSs supplied by renewable energy, this paper develops an analytical framework based on the celebrated stochastic geometry. The proposed framework is versatile with numerous features included: non-uniform BS deployment, biased user association, flexible operation of off-grid SBSs, and resource allocation with minimum rate guarantee. We obtain important distance distributions, association probabilities, and coverage probabilities. Extensive numerical results validate the accuracy of theoretical analysis and show the impact of key system parameters on the performance of HetNet with off-grid SBSs.

Original languageEnglish
Article number8412748
Pages (from-to)6135-6148
Number of pages14
JournalIEEE Transactions on Wireless Communications
Issue number9
Publication statusPublished - 2018 Sep

All Science Journal Classification (ASJC) codes

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics


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