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From Opportunistic Networks to 3GPP Network-Independent Device-to-Device Communication
KTH, School of Electrical Engineering (EES), Communication Networks. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.ORCID iD: 0000-0002-9176-3454
KTH, School of Electrical Engineering (EES), Communication Networks. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.ORCID iD: 0000-0002-3704-1338
2015 (English)Report (Other academic)
Abstract [en]

Device-to-device (D2D) communication is being proposed as a complement to traditional communication via cellular networks. D2D establishes a direct communication link between mobile devices instead of relaying traffic through the cellular infrastructure. While D2D is currently one of the popular research topics in telecommunications, the concept of allowing devices in proximity to communicate directly with one another has been extensively studied for more than a decade under the name opportunistic communication. We here compare 3GPP’s network-independent D2D communication to opportunistic communication and demonstrate that they share a number of common characteristics. We discuss which best practices from the opportunistic networking domain may be applied to networkindependent D2D, and outline open questions in the D2D design that have not been answered by previous research efforts.

Place, publisher, year, edition, pages
KTH Royal Institute of Technology, 2015. , 7 p.
Series
TRITA-EE, ISSN 1653-5146 ; TRITA-EE 2015:99
National Category
Telecommunications
Identifiers
URN: urn:nbn:se:kth:diva-175755OAI: oai:DiVA.org:kth-175755DiVA: diva2:867554
Note

QC 20160129

Available from: 2015-11-05 Created: 2015-10-20 Last updated: 2016-01-29Bibliographically approved
In thesis
1. 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

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