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Future Internet 2017, 9(4), 92; doi:10.3390/fi9040092

Social-Aware Relay Selection for Cooperative Multicast Device-to-Device Communications

Department of Information Engineering, University of Florence, 50139 Florence, Italy
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Received: 29 September 2017 / Revised: 27 November 2017 / Accepted: 28 November 2017 / Published: 4 December 2017
(This article belongs to the Special Issue Recent Advances in Cellular D2D Communications)
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Abstract

The increasing use of social networks such as Facebook, Twitter, and Instagram to share photos, video streaming, and music among friends has generated a huge increase in the amount of data traffic over wireless networks. This social behavior has triggered new communication paradigms such as device-to-device (D2D) and relaying communication schemes, which are both considered as strong drivers for the next fifth-generation (5G) cellular systems. Recently, the social-aware layer and its relationship to and influence on the physical communications layer have gained great attention as emerging focus points. We focus here on the case of relaying communications to pursue the multicast data dissemination to a group of users forming a social community through a relay node, according to the extension of the D2D mode to the case of device-to-many devices. Moreover, in our case, the source selects the device to act as the relay among different users of the multicast group by taking into account both the propagation link conditions and the relay social-trust level with the constraint of minimizing the end-to-end content delivery delay. An optimization procedure is also proposed in order to achieve the best performance. Finally, numerical results are provided to highlight the advantages of considering the impact of social level on the end-to-end delivery delay in the integrated social–physical network in comparison with the classical relay-assisted multicast communications for which the relay social-trust level is not considered. View Full-Text
Keywords: multicast; device-to-device communications; Internet of Things; mobile social networks multicast; device-to-device communications; Internet of Things; mobile social networks
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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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Chiti, F.; Fantacci, R.; Pierucci, L. Social-Aware Relay Selection for Cooperative Multicast Device-to-Device Communications. Future Internet 2017, 9, 92.

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