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2017 | OriginalPaper | Buchkapitel

1. Traffic Offloading in Heterogeneous Cellular Networks

verfasst von : Yuan Wu, Li Ping Qian, Jianwei Huang, Xuemin (Sherman) Shen

Erschienen in: Radio Resource Management for Mobile Traffic Offloading in Heterogeneous Cellular Networks

Verlag: Springer International Publishing

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Abstract

Media-hungry mobile devices and mobile traffic have been experiencing an exponential growth in the past decade. As reported in Cisco Visual Networking Index (VNI) [1], the global mobile traffic grew from 2.1 exabytes/month at the end of 2014 to 3.7 exabytes/month at the end of 2015, corresponding to 74% growth in 2015, and the growth rate is expected to continue at a compound annual growth rate at 53% until 2020. The huge traffic demand has overloaded cellular radio access networks (RANs), which in comparison experience a much slower capacity increase. It becomes a critical challenge for the cellular operators to accommodate the heavy traffic demand in a timely and cost-efficient manner. Directly upgrading RANs may be undesirable from operators’ perspective for the following two concerns: (i) upgrading RANs requires a huge capital investment, which may not be easily recovered even by accommodating the traffic demand, and (ii) acquiring more licensed spectrum bands for the upgraded RANs is difficult and expensive due to the regulation policy. Fortunately, nowadays cellular networks are structured in a multitier architecture, namely, a large number of heterogeneous small cells (such as picocells, femtocells, and WiFi systems) have densely underlaid conventional macrocells [2]. Hence, traffic offloading through small cells provides an effective and cost-efficient way to accommodate mobile users’ traffic.

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Metadaten
Titel
Traffic Offloading in Heterogeneous Cellular Networks
verfasst von
Yuan Wu
Li Ping Qian
Jianwei Huang
Xuemin (Sherman) Shen
Copyright-Jahr
2017
DOI
https://doi.org/10.1007/978-3-319-51037-8_1

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