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Energy minimization for delay constrained mobile edge computing with orthogonal and non-orthogonal multiple access
KTH, School of Electrical Engineering and Computer Science (EECS), Computer Science, Network and Systems Engineering.
KTH, School of Electrical Engineering and Computer Science (EECS), Computer Science, Network and Systems Engineering.ORCID iD: 0000-0002-2764-8099
2020 (English)In: Ad hoc networks, ISSN 1570-8705, E-ISSN 1570-8713, Vol. 98, article id 102060Article in journal (Refereed) Published
Abstract [en]

Mobile edge computing (MEC) is envisioned as a promising technology for enhancing the computation capacities and prolonging the lifespan of mobile devices, by enabling mobile devices to offload computation-intensive tasks to servers in close proximity. For wireless communication, MEC introduces a new scenario, where computations are performed directly at the receiving side of the wireless links. Our objective is therefore to evaluate the importance of joint radio-and-computational resource allocation and spectral efficiency enhancing techniques in this new scenario. We formulate the resource allocation problem to minimize the energy consumption of computation offloading of delay sensitive tasks and propose near-optimal solutions for both orthogonal and non-orthogonal multiple access schemes, with the optimal joint allocation of computing resources and transmission power. Our numerical results demonstrate the superiority of non-orthogonal multiple access over its orthogonal counterpart and the importance of joint resource allocation, especially in scenarios with strict delay limits, where both the transmission and the computational resources are scarce.

Place, publisher, year, edition, pages
Elsevier, 2020. Vol. 98, article id 102060
Keywords [en]
Energy minimization, Mobile edge computing (MEC), Non-orthogonal multiple access (NOMA), Power allocation, Resource allocation
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-267798DOI: 10.1016/j.adhoc.2019.102060ISI: 000513987100002Scopus ID: 2-s2.0-85076445482OAI: oai:DiVA.org:kth-267798DiVA, id: diva2:1411260
Note

QC 20200303

Available from: 2020-03-03 Created: 2020-03-03 Last updated: 2020-03-17Bibliographically approved

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Zeng, MingFodor, Viktória

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