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dc.contributor.authorKakar, Jaber
dc.contributor.authorAlameer, Alaa
dc.contributor.authorChaaban, Anas
dc.contributor.authorSezgin, Aydin
dc.contributor.authorPaulraj, Arogyaswami
dc.date.accessioned2017-12-28T07:32:12Z
dc.date.available2017-12-28T07:32:12Z
dc.date.issued2017-10-29
dc.identifier.citationKakar, J., Alameer, A., Chaaban, A., Sezgin, A., & Paulraj, A. (2018). Delivery Time Minimization in Edge Caching: Synergistic Benefits of Subspace Alignment and Zero Forcing. 2018 IEEE International Conference on Communications (ICC). doi:10.1109/icc.2018.8422869
dc.identifier.doi10.1109/icc.2018.8422869
dc.identifier.urihttp://hdl.handle.net/10754/626483
dc.description.abstractAn emerging trend of next generation communication systems is to provide network edges with additional capabilities such as additional storage resources in the form of caches to reduce file delivery latency. To investigate this aspect, we study the fundamental limits of a cache-aided wireless network consisting of one central base station, $M$ transceivers and $K$ receivers from a latency-centric perspective. We use the normalized delivery time (NDT) to capture the per-bit latency for the worst-case file request pattern at high signal-to-noise ratios (SNR), normalized with respect to a reference interference-free system with unlimited transceiver cache capabilities. For various special cases with $M=\{1,2\}$ and $K=\{1,2,3\}$ that satisfy $M+K\leq 4$, we establish the optimal tradeoff between cache storage and latency. This is facilitated through establishing a novel converse (for arbitrary $M$ and $K$) and an achievability scheme on the NDT. Our achievability scheme is a synergistic combination of multicasting, zero-forcing beamforming and interference alignment.
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)
dc.relation.urlhttp://arxiv.org/abs/1710.10654v2
dc.relation.urlhttp://arxiv.org/pdf/1710.10654v2
dc.rightsArchived with thanks to arXiv
dc.titleDelivery Time Minimization in Edge Caching: Synergistic Benefits of Subspace Alignment and Zero Forcing
dc.typePreprint
dc.contributor.departmentCommunication Theory Lab
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
dc.eprint.versionPre-print
dc.contributor.institutionInstitute of Digital Communication Systems, Ruhr-Universitat Bochum, Germany
dc.contributor.institutionInformation Systems Laboratory, Stanford University, CA, USA
dc.identifier.arxivid1710.10654
kaust.personChaaban, Anas
refterms.dateFOA2018-06-14T05:31:01Z


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