A top read technology website The Register* has published a news article based on the study authored by Ejder Baştuğ and Mérouane Debbah of SUPÉLEC, France, and Mehdi Bennis of the Centre for Wireless Communications at the University of Oulu in Finland.
In their study, the three researchers have investigated in-network caching from a stochastic geometry perspective, as an efficient means offloading the backhaul in view of upcoming 5G networks.
The researchers state, that the only way of dealing with the relentless traffic demands and capacity crunch problem is via network densification (Hetnets and small cell networks).
-Nevertheless, simply adding small cells is inadequate putting increasing demands on backhaul networks, Dr Bennis comments.
The modeling takes into account parameters like signal-to-inteference-plus-noise ratio (SINR), base station location, target file bitrate, storage size and the popularity distribution of individual files. This formulation is the first attempt to couple cache design with the physical layer.
According to the online news article published in The Register ”the trade-off the paper presents is one that will be of interest to carriers: although the best way to improve end user performance is to build out more base stations, with the right cache design, adding storage to the base station can mitigate the need to build out extra backhaul.”
The original paper ”Cache-enabled Small Cell Networks: Modeling and Tradeoffs” has been submitted to the ISWCS'2014 Special Session on Distributed Caching in Wireless Networks.
In his future work Dr Mehdi Bennis will investigate how social networks improve the planning and optimization of large-scale network deployments.
*) 9,5 million unique browsers monthly (2013, Audit Bureau of Circulations Limited)
Last updated: 23.5.2014