Change search
ReferencesLink to record
Permanent link

Direct link
The energy intensity of the internet: Home and access networks
KTH, School of Computer Science and Communication (CSC), Centres, School of Architecture and the Built Environment (ABE), Centres, Centre for Sustainable Communications, CESC.
2015 (English)In: Advances in Intelligent Systems and Computing, ISSN 2194-5357, Vol. 310, 137-155 p.Article in journal (Refereed) Published
Abstract [en]

Estimates of the energy intensity of the Internet diverge by several orders of magnitude. We present existing assessments and identify diverging definitions of the system boundary as the main reason for this large spread. The decision of whether or not to include end devices influences the result by 1–2 orders of magnitude. If end devices are excluded, customer premises equipment (CPE) and access networks have a dominant influence. Of less influence is the consideration of cooling equipment and other overhead, redundancy equipment, and the amplifiers in the optical fibers. We argue against the inclusion of end devices when assessing the energy intensity of the Internet, but in favor of including CPE, access networks, redundancy equipment, cooling and other overhead as well as optical fibers. We further show that the intensities of the metro and core network are best modeled as energy per data, while the intensity of CPE and access networks are best modeled as energy per time (i.e., power), making overall assessments challenging. The chapter concludes with a formula for the energy intensity of CPE and access networks. The formula is presented both in generic form as well as with concrete estimates of the average case to be used in quick assessments by practitioners. The next chapter develops a similar formula for the core and edge networks. Taken together, the two chapters provide an assessment method of the Internet’s energy intensity that takes into account different modeling paradigms for different parts of the network.

Place, publisher, year, edition, pages
2015. Vol. 310, 137-155 p.
Keyword [en]
Access network, Customer premises equipment, Energy efficiency, Energy intensity, Internet, Equipment, Fiber amplifiers, Optical fibers, Redundancy, Cooling equipment, Generic forms, Modeling paradigms, Orders of magnitude, System boundary, Customer premise
National Category
Computer Systems Energy Systems
URN: urn:nbn:se:kth:diva-167784DOI: 10.1007/978-3-319-09228-7_8ScopusID: 2-s2.0-84919366981OAI: diva2:813775

QC 20150525

Available from: 2015-05-25 Created: 2015-05-22 Last updated: 2015-05-25Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Hilty, Lorenz M.
By organisation
Centre for Sustainable Communications, CESC
In the same journal
Advances in Intelligent Systems and Computing
Computer SystemsEnergy Systems

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 83 hits
ReferencesLink to record
Permanent link

Direct link