Energy and cost impacts of relay and femtocell deployments in long-term-evolution advanced

C. Khirallah; J.S. Thompson; H. Rashvand

Energy and cost impacts of relay and femtocell deployments in long-term-evolution advanced

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Energy and cost impacts of relay and femtocell deployments in long-term-evolution advanced

Author(s): C. Khirallah ; J.S. Thompson ; H. Rashvand
DOI: 10.1049/iet-com.2011.0111

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Author(s): C. Khirallah ¹ ; J.S. Thompson ¹ ; H. Rashvand ²
- Affiliations: 1: School of Engineering, University of Edinburgh, Edinburgh, UK
  2: School of Engineering, University of Warwick, Coventry, UK
Source: Volume 5, Issue 18, 16 December 2011, p. 2617 – 2628
DOI: 10.1049/iet-com.2011.0111 , Print ISSN 1751-8628, Online ISSN 1751-8636

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In long-term-evolution-advanced (LTE-advanced), heterogeneous deployments of relays, femtocells and conventional macrocells are expected to provide coverage extension and throughput enhancement, while significantly lowering the energy consumption and total-cost-of-ownership (TCO) in cellular networks. This study presents a methodology for estimating the total energy consumption, taking into account the total operational power and embodied energy, and TCO of wireless cellular networks, and in particular provides a means to compare homogeneous and heterogeneous network (HetNets) deployments. The authors introduce realistic energy models and energy metrics based on information available from mobile-network operators (MNOs) and base stations manufacturers. Additionally, up-to-date operational and capital expenditure (OPEX and CAPEX) models are used to calculate TCO of candidate networks. The authors evaluate two scenarios for HetNets, namely a joint macro-relay network and a joint macro–femtocell network, with different relay and femtocell deployments densities. The results obtained show that compared to macro-centric networks, joint macro-relay networks are both energy and cost efficient, whereas joint macro–femtocell networks reduce the networks TCO at the expense of increased energy-consumption. Finally, it is observed that energy and cost gains are highly sensitive to the OPEX model adopted.

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Energy and cost impacts of relay and femtocell deployments in long-term-evolution advanced

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