Paper Info
Title
System-Level Spatiotemporal Offloading With Inter-Cell Mobility Model for Device-to-Device (D2D) Communication-Based Mobile Caching in Cellular Network.
Abstract
We present a new spatiotemporal offloading (STO) framework that can deal with the time-varying traffic demand in an overloaded location using proactive caching during off-peak times. Focusing on a conventional cellular network, the system-wide mobility can be captured by the inter-cell transitions along individual users & x2019; mobility pattern. It is opposed to the existing geographical caching for content placement during off-peak times, which treats a system built around multiple base stations as a single service area, thus limiting its performance to low hit probability. We formulate a system-level STO problem to determine a content placement strategy that minimizes the access link load by delivering the requested data through device-to-device (D2D) links, rather than through a cellular link, particularly targeting potentially overloaded cells. Because its complexity is seriously attributed to the individual users & x2019; cell-by-cell mobility and content preferences, an aggregated flow model has been proposed to reduce the search space by invoking the law of segment conservation. Simulation results clearly demonstrate the effect of the spatiotemporal offloading that can be realized through inter-cell mobility-aware proactive caching. An extremely important implication of the current framework is that a varying traffic demand can be spatiotemporally distributed in a cellular system, overcoming the traditional limitation that arises from conservative or inefficient resource allocation due to a reliance on over-dimensioning.
Year
DOI
Venue
2020
10.1109/ACCESS.2020.2980560
IEEE ACCESS
Keywords
DocType
Volume
Content delivery,wireless caching,mobility-aware caching,D2D caching,spatiotemporal offloading
Journal
8
ISSN
Citations 
PageRank 
2169-3536
0
0.34
References 
Authors
0
4
Name
Order
Citations
PageRank
Junman Lee100.34
Sang Hyun Lee220633.61
Minjoong Rim311621.86
Chung Gu Kang430742.25