Green backhauling for heterogeneous mobile access networks: What are the challenges?

• Published in: 2013 9th International Conference on Information, Communications and Signal Processing (ICICS) pp. 1 - 5
• Main Authors: Farias, F. S., Monti, P., Vastberg, A., Nilson, M., Costa, J. C. W. A., Wosinska, L.
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01.12.2013
• Subjects: Copper; energy efficiency; femto; fiber; HetNet; macro; micro; microwave; migration strategies; mobile backhaul; Mobile communication; Optical fiber cables; Optical fiber networks; Optical wavelength conversion; pico; Wireless LAN
• DOI: 10.1109/ICICS.2013.6782868

Heterogeneous network (HetNet) deployment strategies have the potential to improve the energy efficiency of mobile access networks. One key aspect to consider in HetNets is the impact of the power consumption of the backhaul, i.e., the overall energy efficiency of a HetNet deployment is affected by the backhaul technology and architecture. This paper presents a preliminary assessment of the design challenges of a future green backhaul segment for a HetNet deployment. The study is based on the analysis of the medium term future outlook (i.e., between now and the year 2025) of the main technologies used in todays'* backhaul networks (i.e., fiber, microwave and copper). It can be concluded that, even if there arc no doubts that both microwave and fiber will be predominately used in the future, the possible migration paths leading to such fiber- and microwave-dominated scenarios might be different, depending on factors such as spectrum and license costs, time to deployment, availability of equipment, and required Quality of Service (QoS) levels.