Device-to-Device Device Communication Underlaying a Finite Cellular Network Region
Abstract: band device device-to-device device (D2D) communication can improve the Underlay in-band spectrum efficiency of cellular networks. However, the coexistence of D2D and cellular users causes inter-cell inter and intra-cell cell interference. The former can be effectively managed through inter-cell inter cell interference coordination and, therefore, is not considered in this paper. Instead, we focus on the intra-cell intra interference and propose a D2D mode selec selection tion scheme to manage it inside a finite cellular network region. The potential D2D users are controlled by the base station (BS) to operate in D2D mode based on the average interference generated to the BS. Using stochastic geometry, we study the outage p probability robability experienced at the BS and a D2D receiver, and spectrum reuse ratio, which quantifies the average fraction of successfully transmitting D2D users. The analysis shows that the outage probability at the D2D receiver varies for different locations. In addition, without impairing the performance at the BS, if the path-loss path loss exponent on the cellular link is slightly lower than that on the D2D link, the spectrum reuse ratio can have negligible decrease, while the D2D users' average number of successful transmissions ransmissions increases with increasing D2D node density. This indicates that an increasing level of D2D communication can be beneficial in future networks.