Device-to-Device Communication in Wireless Mobile Social Networks

Wireless mobile social networks have been introduced to consider characteristics of mobile user´s behaviors for network configuration. The device-to-device (D2D) communication is to increase the network spectral efficiency by allowing users to communicate directly with the corresponding destinations. This paper develops a framework for the design of reliable D2D communication provided wireless mobile social network (D2D-MSN), and introduces a D2D- MSN throughput as a new measurement of the spectral efficiency achieved by users communicating successfully. Our framework accounts for spatial user distributions and the link distance-based mode selection scheme that allows the D2D mode only for the users with shorter link distance than a threshold. We also account for the communication distance distribution defined in a social context to decrease the communication probability density according to the link distance with a power exponent. This research offers insights on the optimal configuration of the D2D-MSN, and also provide a new perspective on the effect of the link distance distribution on the D2D communication performance.