## Abstract

The cost-effective impact and fundamental limits of infrastructure support with rate-limited wired backhaul links (i.e., GreenInfra support), directly connecting base stations (BSS), are analyzed in a large-scale hybrid network of unit node density, where multiantenna BSS are deployed. We consider a general scenario such that the rate of each BS-to-BS link scales at an arbitrary rate relative to the number of randomly located wireless nodes $n$. For the operating regimes with respect to the number of BSS and the number of antennas at each BS, we first analyze the minimum rate of each backhaul link C_{BS}, required to guarantee the same throughput scaling as in the infinite-capacity backhaul link case. We then identify the operating regimes in which the required rate C_{BS} scales slower than n^{ϵ} for an arbitrarily small ϵ > 0 (i.e., the regimes where C_{BS} does not need to be infinitely large). We also show the case where our network with GreenInfra is fundamentally in the infrastructure-limited regime, in which the performance is limited by the rate of backhaul links. In addition, we derive a generalized throughput scaling law including the case where the rate of each backhaul link scales slower than C_{BS}. To validate the throughput scaling law for finite values of system parameters, numerical evaluation is also shown via computer simulations.

Original language | English |
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Article number | 7448815 |

Pages (from-to) | 1179-1191 |

Number of pages | 13 |

Journal | IEEE Journal on Selected Areas in Communications |

Volume | 34 |

Issue number | 5 |

DOIs | |

Publication status | Published - 2016 May |

### Bibliographical note

Publisher Copyright:© 1983-2012 IEEE.

## All Science Journal Classification (ASJC) codes

- Computer Networks and Communications
- Electrical and Electronic Engineering