Device-to-Device Communication Underlaying a Finite Cellular Network Region

TL;DR

This paper proposes a D2D mode selection scheme within finite cellular regions to manage intra-cell interference, analyzing its impact on outage probability and spectrum reuse, and demonstrating potential benefits of increased D2D communication.

Contribution

It introduces a novel D2D mode selection scheme based on interference control and uses stochastic geometry for analysis within finite cellular regions.

Findings

Outage probability varies with location of D2D receivers.

Slightly lower path-loss exponent on cellular links benefits spectrum reuse.

Increasing D2D density can improve successful transmission rates.

Abstract

Underlay in-band device-to-device (D2D) communication can improve the spectrum efficiency of cellular networks. However, the coexistence of D2D and cellular users causes inter-cell and intra-cell interference. The former can be effectively managed through inter-cell interference coordination and, therefore, is not considered in this work. Instead, we focus on the intra-cell interference and propose a D2D mode selection 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 probability 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. Additionally, without impairing the performance at the BS, if the 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 increases with increasing D2D node density. This indicates that an increasing level of D2D communication can be beneficial in future networks..