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8 - Small cell deployments: system scenarios, performance, and analysis

Published online by Cambridge University Press:  05 December 2015

By
Mark C. Reed  and
He Wang
Edited by
Alagan Anpalagan ,
Mehdi Bennis  and
Rath Vannithamby
Mark C. Reed
Affiliation:
NICTA, Australia
He Wang
Affiliation:
NICTA, Australia
Alagan Anpalagan
Affiliation:
Ryerson Polytechnic University, Toronto
Mehdi Bennis
Affiliation:
University of Oulu, Finland
Rath Vannithamby
Affiliation:
Intel Corporation, Portland, Oregon
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Summary

Mobile device data rates are increasing at effectively Moore's law [1] due to the fact that mobile devices are all integrated in silicon and thus are taking advantage of the reduction in geometry and increase in functionality and the number of transistors per die. The current cellular approach of using large outdoor base station towers to provide mobile broadband via wireless communications, however, does not scale efficiently to cope with the forecast 13-fold increase expected by 2017 [2]. Thus a need for a new approach is required. As we will discuss in this chapter, small cell deployments have the potential to provide a scalable solution to this demand where they are beginning to change the network topology into a so-called heterogeneous network (HetNet) containing a mix of different cell sizes and cell power levels, as shown in Figure 8.1. This will lead to a mix of macro cells, micro cells, pico cells, and femto cells. This deployment is not as uniform as outdoor macro cells with different cell sizes and a much more irregular deployment results.

As we will show in this chapter, small cell network (SCN) deployments provide, for the first time, a low-cost efficient scalable architecture to meet the expected demand. This technology was initially deployed in large scale when femto cells (residential small cells) were first deployed by a number of leading wireless operators (including Vodafone and AT&T). The solution was enabled by two key developments, namely:

  1. • low-cost chip-sets (a so-called “system-on-chip”), which included the entire signal processing and most of the radio software stack, and

  2. • high-speed internet access (greater than Mbps) was available, thus providing the so-called “backhaul” (the connectivity into the network) for these access points.

These developments mean that with volume the effective capital costs of small cells are negligible compared to the cost of deployment and operating costs.

Small cell deployments have a range of topologies and configurations that will depend on the location and the demand requirements. For example, downtown city areas will consist of a combination of small cells where they will exist:

  1. on outdoor light poles to serve “hotspot” traffic needs around cafes and other places where users congregate

  2. in city buildings to serve enterprise customers with high demands on throughput and reliability

  3. in apartments or residential homes to serve private users' needs.

Type
Chapter
Information
Design and Deployment of Small Cell Networks , pp. 169 - 190
Publisher: Cambridge University Press
Print publication year: 2015

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