On the Spectral Efficiency and Energy Efficiency Analysis of Cache-Enabled Heterogeneous Networks with Device-to-Device Communication and Cooperative Transmission

Simple item page
dc.contributor.advisorFapojuwo, Abraham O.
dc.contributor.authorOchia, Okechukwu Emmanuel
dc.contributor.committeememberMessier, Geoffrey G.
dc.contributor.committeememberSesay, Abu B.
dc.contributor.committeememberWilliamson, Carey L.
dc.contributor.committeememberHossain, Ekram
dc.date2021-06
dc.date.accessioned2021-01-15T17:06:37Z
dc.date.available2021-01-15T17:06:37Z
dc.date.issued2021-01-07
dc.description.abstractThe Heterogeneous network (HetNet) is a viable candidate for achieving high spectral efficiency (SE) and energy efficiency (EE) in fifth-generation (5G) networks. Cache-enabled HetNets with device-to-device (D2D) communication can exploit the availability of cheap memory to improve file delivery and reduce file download latency. In HetNets with simultaneous requests for different file types, the design problems centered on what file to store and how to utilize limited caching capacity impact the SE and EE. In this thesis, an association scheme that computes the D2D communication range based on out-of-cell interference is proposed for establishing cellular and D2D links in a HetNet. The proposed interference-aware, D2D distance threshold-based association scheme achieves up to 67% gain in the SE and EE compared to the state-of-the-art minimum path loss-based association scheme. Further, a popularity and size-aware (PSA) caching scheme is proposed in a hybrid microwave/millimetre wave HetNet. The PSA caching scheme allocates memory blocks for caching according to Pareto, lognormal, and Gamma file size distributions based on empirical measurements and is different than the state-of-the-art probabilistic, size-weighted-popularity (SWP)-based, and most-popular-content (MPC) caching schemes that assume equal file size. Numerical results show that the proposed PSA caching scheme provides up to 33% increase in the cache hit probability compared to the probabilistic and MPC caching schemes. Besides, the PSA scheme achieves up to 17% gain in the file transmission success probability compared to the state of the art. Also, cooperative transmission among transmitters under the PSA caching scheme realizes up to 70% gain in the file transmission success probability compared to a non-cooperative transmission scheme. Lastly, the integration of large scale antenna arrays is proposed to enhance the transmission capacity of a cache-enabled HetNet with D2D communication. The results reveal that the transmission capacity of the HetNet scales linearly with the number of antenna elements per transmitter, provided that the number of antenna elements is not so large. The results in this thesis prove the usefulness of adopting content-aware caching and multiple transmission schemes to improve the performance of a HetNet with unlimited file requests and limited caching capacity.en_US
dc.identifier.citationOchia, O. E. (2021). On the Spectral Efficiency and Energy Efficiency Analysis of Cache-Enabled Heterogeneous Networks with Device-to-Device Communication and Cooperative Transmission (Doctoral thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca.en_US
dc.identifier.doihttp://dx.doi.org/10.11575/PRISM/38554
dc.identifier.urihttp://hdl.handle.net/1880/112973
dc.language.isoengen_US
dc.publisher.facultySchulich School of Engineeringen_US
dc.publisher.institutionUniversity of Calgaryen
dc.rightsUniversity of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.en_US
dc.subjectCachingen_US
dc.subjectHeterogeneous Networksen_US
dc.subjectDevice-to-deviceen_US
dc.subjectCooperative transmissionen_US
dc.subjectSpectral efficiencyen_US
dc.subjectEnergy efficiencyen_US
dc.subject.classificationMathematicsen_US
dc.subject.classificationComputer Scienceen_US
dc.subject.classificationEngineeringen_US
dc.titleOn the Spectral Efficiency and Energy Efficiency Analysis of Cache-Enabled Heterogeneous Networks with Device-to-Device Communication and Cooperative Transmissionen_US
dc.typedoctoral thesisen_US
thesis.degree.disciplineEngineering – Electrical & Computeren_US
thesis.degree.grantorUniversity of Calgaryen_US
thesis.degree.nameDoctor of Philosophy (PhD)en_US
ucalgary.item.requestcopytrueen_US
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
ucalgary_2021_ochia_okechukwu.pdf
Size:
1.37 MB
Format:
Adobe Portable Document Format
Description:
Main File
Download
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
2.62 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Open Theses and Dissertations