Socially‐Aware Cooperative D2D and D4D Communications toward Fog Networking

Abstract

This chapter aims at boosting the network bandwidth by promoting collaborative communications between handheld devices at the network edge by using the principle of fog networking. Such device‐to‐device (D2D) and device‐for‐device (D4D) communications can offer a variety of advantages over traditional cellular communications, such as higher user throughput, improved spectral efficiency, and extended network coverage. The chapter proposes a novel social trust and social reciprocity‐based framework to promote efficient cooperation among devices for cooperative D2D and D4D communications‐based fog networking. It introduces the physical‐social graphs to model the interplay therein while capturing the physical constraints for feasible D2D cooperation and the social relationships among devices for effective cooperation by projecting D2D communications in a mobile social network onto both physical and social domains. The chapter formulates the relay selection problem for social trust and social reciprocity‐based cooperative D2D communications as a coalitional game. It develops a network‐assisted mechanism to implement the coalitional game‐based solution.