Distributed D2D Resource Allocation for Reducing Interference in Ultra-Dense Networks With Generic Imperfection

In ultra-dense D2D networks where resources can be reused with no restrictions, co-channel interference can be a significant source of performance degradation. This paper studies the outage performance of a recently proposed simultaneous device-to-device (D2D) resource allocation. The scheme is modified with the aim of allocating D2D network resources such that co-channel interference can be minimized. It attempts to allocate a D2D transmitter and one channel to a D2D receiver of interest in a decentralized manner while meeting the aforementioned objective. The developed results for the statistics of the aggregate interference-to-noise ratio (INR) address generic cases for deficient allocation of the D2D transmitter and/or the channel. Moreover, the outage performance is investigated when channel inversion for the desired D2D link is feasible or not. Furthermore, scenarios of array processing at the D2D receiver to further alleviate the impact of interference are incorporated into the developed results. The findings in this paper treat many practical scenarios and can lead to insights on the impact of deficient D2D resource allocation for interference minimization with and without D2D receiver array processing on the outage performance of each D2D receiver.