Cooperation Stimulation

Abstract

In D2D communications the users work both as servers and clients, thus cooperation stimulation is an important technology as the system availability mainly depends on the cooperation degree of the users. Considering the particular features of D2D communication, resource-exchange-based incentive mechanism is a superior choice as it neither relies on the use of tamper-proof hardware nor monitors other’s behavior as implemented in CB or RB. We propose a resource-exchange-based cooperation stimulation scheme in this chapter. Specifically, the users obtain their demanding contents at the cost of sending contents to their counterparts. By this method, contents are disseminated cooperatively with D2D communications in the network. Furthermore, as multimedia dominates the contents with Quality of Experience (QoE) as a key measurement, the cooperation stimulation mechanism is constructed for maximizing user QoE characterized by Mean Opinion Score (MOS). In the proposed scheme, the users compute their transmitter MOS and receiver MOS, and send them to the content provider (CP). Then, the CP formulates a weighted directed graph based on the network topology and connection MOS. By factorizing the graph, the content dissemination scheme is designed according to the 1-Factor with the maximum weight. Additionally, in order to realize cheat-proof, a debt mechanism is introduced in the scheme.