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Sensors 2016, 16(7), 974; doi:10.3390/s16070974

Mobility-Aware Caching and Computation Offloading in 5G Ultra-Dense Cellular Networks

1
School of Computer Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
2
Department of Computer Science, Pace University, New York, NY 10038, USA
3
School of Data and Computer Science, Sun Yat-sen University, Guangzhou 510006, China
4
Laboratory for Telecommunications, Faculty of Electrical Engineering, University of Ljubljana, Trzaska 25, SI-1000 Ljubljan, Slovenia
*
Author to whom correspondence should be addressed.
Academic Editor: Yong Li
Received: 6 April 2016 / Revised: 18 June 2016 / Accepted: 20 June 2016 / Published: 25 June 2016
(This article belongs to the Special Issue Millimeter Wave Wireless Communications and Networks)
View Full-Text   |   Download PDF [653 KB, uploaded 25 June 2016]   |  

Abstract

Recent trends show that Internet traffic is increasingly dominated by content, which is accompanied by the exponential growth of traffic. To cope with this phenomena, network caching is introduced to utilize the storage capacity of diverse network devices. In this paper, we first summarize four basic caching placement strategies, i.e., local caching, Device-to-Device (D2D) caching, Small cell Base Station (SBS) caching and Macrocell Base Station (MBS) caching. However, studies show that so far, much of the research has ignored the impact of user mobility. Therefore, taking the effect of the user mobility into consideration, we proposes a joint mobility-aware caching and SBS density placement scheme (MS caching). In addition, differences and relationships between caching and computation offloading are discussed. We present a design of a hybrid computation offloading and support it with experimental results, which demonstrate improved performance in terms of energy cost. Finally, we discuss the design of an incentive mechanism by considering network dynamics, differentiated user’s quality of experience (QoE) and the heterogeneity of mobile terminals in terms of caching and computing capabilities. View Full-Text
Keywords: caching; computation offloading; human mobility caching; computation offloading; human mobility
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Chen, M.; Hao, Y.; Qiu, M.; Song, J.; Wu, D.; Humar, I. Mobility-Aware Caching and Computation Offloading in 5G Ultra-Dense Cellular Networks. Sensors 2016, 16, 974.

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