Mexico. Bell Labs has found that today's ultra-broadband mobile networks can produce significant energy savings and performance gains by deploying a combination of macro and small cellular radio bases.
The discovery is the result of a research project – IntelliSpektrum – that brought together bell Labs, the Fraunhofer Institute for Solid State Physics, the Fraunhofer Heinrich-Hertz Institute and Intel Mobile Communications GmbH.
The aim of the project was to demonstrate how, even with the increase in mobile data traffic and the increase of mobile devices connecting to the network, stations can be dynamically adapted to improve traffic loads and save energy without adverse effects on the quality of service to users. The findings in the research report are as follows:
It is possible to have significant energy savings in heterogeneous mobile networks (HetNet) that are composed of a combination of radio stations, including Macro, Metro, Pico and Femto.
Energy savings of more than 50% were observed in mobile networks with a larger number of small cells compared to those composed solely of macro base stations. Since then IntelliSpektrum has transferred these results to the GreenMeter study of the GreenTouch™ initiative. This has improved the simulation approach that will be used and distributed in GreenTouch publications.
HetNet networks are able to make more efficient use of infrastructure because they can better adapt to load situations with a lot or little traffic.
While the number of radio base stations in close proximity to current ultra-broadband networks can create a risk of inter-cell interference (ICI) and impair quality of service, when interference coordination is employed it not only reduces the risk of ICI but also shows energy gain performance; Performance gains of 10% on downlinks (when the mobile device is connected to the base station) were observed.
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