Mobility increases the data offloading ratio in D2D caching networks

Rui Wang, Jun Zhang, S. H. Song, Khaled Letaief

Research output: Chapter in Book/Report/Conference proceedingConference contribution

12 Citations (Scopus)

Abstract

Caching at mobile devices, accompanied by device-to-device (D2D) communications, is one promising technique to accommodate the exponentially increasing mobile data traffic. While most previous works ignored user mobility, there are some recent works taking it into account. However, the duration of user contact times has been ignored, making it difficult to explicitly characterize the effect of mobility. In this paper, we adopt the alternating renewal process to model the duration of both the contact and inter-contact times, and investigate how the caching performance is affected by mobility. The data offloading ratio, i.e., the proportion of requested data that can be delivered via D2D links, is taken as the performance metric. We first approximate the distribution of the communication time for a given user by beta distribution through moment matching. With this approximation, an accurate expression of the data offloading ratio is derived. For the homogeneous case where the average contact and intercontact times of different user pairs are identical, we prove that the data offloading ratio increases with the user moving speed, assuming that the transmission rate remains the same. Simulation results are provided to show the accuracy of the approximate result, and also validate the effect of user mobility.

Original languageEnglish
Title of host publication2017 IEEE International Conference on Communications, ICC 2017
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781467389990
DOIs
Publication statusPublished - 28 Jul 2017
Externally publishedYes
Event2017 IEEE International Conference on Communications, ICC 2017 - Paris, France
Duration: 21 May 201725 May 2017

Other

Other2017 IEEE International Conference on Communications, ICC 2017
CountryFrance
CityParis
Period21/5/1725/5/17

Fingerprint

Communication
Mobile devices

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering

Cite this

Wang, R., Zhang, J., Song, S. H., & Letaief, K. (2017). Mobility increases the data offloading ratio in D2D caching networks. In 2017 IEEE International Conference on Communications, ICC 2017 [7997463] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ICC.2017.7997463

Mobility increases the data offloading ratio in D2D caching networks. / Wang, Rui; Zhang, Jun; Song, S. H.; Letaief, Khaled.

2017 IEEE International Conference on Communications, ICC 2017. Institute of Electrical and Electronics Engineers Inc., 2017. 7997463.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Wang, R, Zhang, J, Song, SH & Letaief, K 2017, Mobility increases the data offloading ratio in D2D caching networks. in 2017 IEEE International Conference on Communications, ICC 2017., 7997463, Institute of Electrical and Electronics Engineers Inc., 2017 IEEE International Conference on Communications, ICC 2017, Paris, France, 21/5/17. https://doi.org/10.1109/ICC.2017.7997463
Wang R, Zhang J, Song SH, Letaief K. Mobility increases the data offloading ratio in D2D caching networks. In 2017 IEEE International Conference on Communications, ICC 2017. Institute of Electrical and Electronics Engineers Inc. 2017. 7997463 https://doi.org/10.1109/ICC.2017.7997463
Wang, Rui ; Zhang, Jun ; Song, S. H. ; Letaief, Khaled. / Mobility increases the data offloading ratio in D2D caching networks. 2017 IEEE International Conference on Communications, ICC 2017. Institute of Electrical and Electronics Engineers Inc., 2017.
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