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On the Successful Delivery Probability of Full-Duplex-Enabled Mobile Edge Caching
, University of Luxembourg, Luxembourg City, L-1855, Luxembourg. (Signal Processing)ORCID iD: 0000-0003-2298-6774
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2019 (English)In: IEEE Communications Letters, ISSN 1089-7798, E-ISSN 1558-2558, Vol. 23, no 6, p. 1016-1020Article in journal (Refereed) Published
Abstract [en]

Cache hit ratio (CHR) is a common metric to evaluate the performance of an edge caching system. While the CHR is efficient to measure throughput reduction gain, it fails to guarantee user quality of experience since the CHR does not capture the last-mile channel uncertainty. In this letter, we investigate a novel successful delivery probability (SDP) metric of full-duplex-enabled mobile edge caching (FD-MEC) systems, defined as a probability that the user receives the requested file before a tolerable delay. First, the average SDP is derived in a closed-form expression for arbitrary caching policy and network topology, taking into account the wireless fading distribution. Second, based on the derived SDP, a suboptimal cache placement is proposed to maximize the average SDP, which is analytically shown to surpass both the most popular and uniform caching policies. Finally, the numerical results are presented to verify the accuracy of our analysis and demonstrate the effectiveness of our proposed cache placement design.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2019. Vol. 23, no 6, p. 1016-1020
Keywords [en]
Interference cancellation;Wireless communication;Fading channels;Random variables;Closed-form solutions;Indexes;Exponential distribution;Mobile edge caching;successful delivery probability;full duplex;cache placement;performance analysis
National Category
Signal Processing
Identifiers
URN: urn:nbn:se:kth:diva-258949DOI: 10.1109/LCOMM.2019.2908847ISI: 000471688000017Scopus ID: 2-s2.0-85067107832OAI: oai:DiVA.org:kth-258949DiVA, id: diva2:1350592
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QC 20190912

Available from: 2019-09-11 Created: 2019-09-11 Last updated: 2019-09-12Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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