Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Evaluating an Energy-efficient Radio Architecture for Opportunistic Communication
KTH, School of Electrical Engineering (EES), Communication Networks.ORCID iD: 0000-0002-9176-3454
KTH, School of Electrical Engineering (EES), Communication Networks.
KTH, School of Electrical Engineering (EES), Communication Networks.
KTH, School of Electrical Engineering (EES), Communication Networks.ORCID iD: 0000-0002-3704-1338
2012 (English)In: Communications (ICC), 2012 IEEE International Conference on, IEEE , 2012, 5751-5756 p.Conference paper, Published paper (Refereed)
Abstract [en]

A major challenge for wireless networks is to minimize the energy consumption in the mobile devices. This work evaluates potential performance gains of a dual-radio architecture in which a low power radio is used to wake up the primary high power radio. Our targeted domain is opportunistic communication directly between devices. We show that it can significantly reduce the energy consumption at a price of slightly decreased goodput. We also examine the effect of the MAC protocol on the performance of the dual-radio system and we point out that in dense scenarios MAC layer protocols, such as of 802.15.4, do not perform well. We observe that information on device density of an environment can be used to address this shortcoming.

Place, publisher, year, edition, pages
IEEE , 2012. 5751-5756 p.
Series
IEEE International Conference on Communications, ISSN 1550-3607
National Category
Telecommunications
Identifiers
URN: urn:nbn:se:kth:diva-100014DOI: 10.1109/ICC.2012.6364747ISI: 000312855706011Scopus ID: 2-s2.0-84871978592ISBN: 978-145772052-9 (print)OAI: oai:DiVA.org:kth-100014DiVA: diva2:542693
Conference
2012 IEEE International Conference on Communications, ICC 2012;Ottawa, ON;10 June 2012 through 15 June 2012
Funder
ICT - The Next Generation
Note

QC 20120803

Available from: 2012-08-03 Created: 2012-08-02 Last updated: 2015-11-20Bibliographically approved
In thesis
1. Opportunistic Content Distribution: A System Design Approach
Open this publication in new window or tab >>Opportunistic Content Distribution: A System Design Approach
2012 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

The penetration of smart pocket-size devices that provide constant Internet connectivity, such as mobile phones, has significantly changed the way people obtain, view and share information. Content provision is not anymore a prerogative to professionals; individuals are not solely customers, but also act as content generators and distributors. This shift in social behavior requires changes in the way information is delivered to target audiences in an efficient, interest-based and location-aware manner.

This thesis explores a solution for opportunistic content distribution in a content-centric network that primarily targets content dissemination among mobile users in urban areas. The term ’opportunistic’ here refers to a concept which rejects the assumption of always-connected user devices and instead allows nodes to leverage sporadic contacts which occur when two neighbors come into direct radio communication range. Such communication mode allows data exchanges to occur in areas with little or no infrastructure; moreover, it is a potential solution for offloading the increasing traffic volumes observed by mobile operators.

The contributions of this thesis lie in three areas. We first outline a general architecture and design for opportunistic content-centric networking. We implement our proposal on the Google Android platform, and provide application scenarios which illustrate the potential of mobile peer-to-peer communication. Our tests however show that energy consumption turns out to be a major issue for opportunistic networks. Therefore, our second effort is in the area of energy-efficiency. We propose a dual-radio architecture for opportunistic communication, and evaluate it through extensive simulations on realistic human mobility traces. Our final study lies in the area of content dissemination when nodes in the network act altruistically and are willing to solicit data on behalf of other participants. We propose a number of relaying and caching strategies, and evaluate them through simulations in environments that exhibit different churn levels.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2012. 91 p.
Series
Trita-EE, ISSN 1653-5146 ; 2012:036
National Category
Telecommunications
Identifiers
urn:nbn:se:kth:diva-100011 (URN)978-91-7501-451-7 (ISBN)
Presentation
2012-09-14, F3, 10:00 (English)
Opponent
Supervisors
Funder
ICT - The Next Generation
Note

QC 20120806

Available from: 2012-08-07 Created: 2012-08-02 Last updated: 2013-09-09Bibliographically approved
2. System Design for Opportunistic Networks
Open this publication in new window or tab >>System Design for Opportunistic Networks
2015 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Device-to-device communication has been suggested as a complement to traditional cellular networks as a means of offloading cellular traffic. In this thesis we explore a solution for device-to-device communication based on opportunistic content distribution in a content-centric network. Communication opportunities arise as mobile nodes roam around in an area and occasionally enter in direct communication range with one another. We consider a node to be a pedestrian equipped with a mobile device and explore the properties of opportunistic communication in the context of content dissemination in urban areas.

The contributions of this thesis lie in three areas. We first study human mobility as one of the main enablers of opportunistic communication. We introduce traces collected from a realistic pedestrian mobility simulator and demonstrate that the performance of opportunistic networks is not very sensitive to the accurate estimation of the probability distributions of mobility parameters. However, capturing the space in which mobility occurs may be of high importance. Secondly, we design and implement a middleware for opportunistic content-centric networking, and we evaluate it via a small-scale testbed, as well as through extensive simulations. We conclude that energy-saving mechanisms should be part of the middleware design, while caching should be considered only as an add-on feature. Thirdly, we present and evaluate three different energy-saving mechanisms in the context of opportunistic networking: a dual-radio architecture, an asynchronous duty-cycling scheme, and an energy-aware algorithm which takes into account node selfishness. We evaluate our proposals analytically and via simulations. We demonstrate that when a critical mass of participants is available, the performance of the opportunistic network is comparable to downloading contents directly via the cellular network in terms of energy consumption while offloading large traffic volumes from the operator.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2015. vi, 59 p.
Series
TRITA-EE, ISSN 1653-5146 ; 2015:104
Keyword
opportunistic communication, system design, mobility, energy-saving mechanisms, device-to-device communication, mobile data offloading
National Category
Telecommunications
Research subject
Electrical Engineering
Identifiers
urn:nbn:se:kth:diva-176479 (URN)978-91-7595-778-4 (ISBN)
Public defence
2015-12-11, Sal F3, Lindstedtsvägen 26, KTH, Stockholm, 09:00 (English)
Opponent
Supervisors
Note

QC 20151120

Available from: 2015-11-20 Created: 2015-11-05 Last updated: 2015-12-11Bibliographically approved

Open Access in DiVA

fulltext(272 kB)157 downloads
File information
File name FULLTEXT01.pdfFile size 272 kBChecksum SHA-512
b37226b119459a0bf909d9374a672b567ecdcd4b1e7b6957b33f1a28ed456f8caf3c7f81bc1422091f89ef359f015c9d1bdd62f1b514b110b2fe8cf3a131d85f
Type fulltextMimetype application/pdf

Other links

Publisher's full textScopusConference website

Authority records BETA

Kouyoumdjieva, SylviaKarlsson, Gunnar

Search in DiVA

By author/editor
Kouyoumdjieva, SylviaHelgason, ÓlafurYavuz, Emre A.Karlsson, Gunnar
By organisation
Communication Networks
Telecommunications

Search outside of DiVA

GoogleGoogle Scholar
Total: 157 downloads
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

doi
isbn
urn-nbn

Altmetric score

doi
isbn
urn-nbn
Total: 271 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf