Combined shared/dedicated resource allocation for Device-to-Device Communication

TL;DR

This paper introduces a novel combined shared/dedicated resource allocation scheme for D2D communication, utilizing graph theory to maximize capacity and outperform existing single-mode schemes.

Contribution

It proposes a new graph-based framework enabling simultaneous shared and dedicated resource use for D2D users, enhancing network capacity.

Findings

D2D capacity increases 1.67 to 2.5 times with the new scheme.

The method effectively identifies resource reuse opportunities.

Performance improves over schemes using only shared or dedicated modes.

Abstract

Device-to-device (D2D) communication is an effective technology enhancing spectral efficiency and network throughput of contemporary cellular networks. Typically, the users exploiting D2D reuse the same radio resources as common cellular users (CUEs) that communicate through a base station. This mode is known as shared mode. Another option is to dedicate specific amount of resources exclusively for the D2D users in so-called a dedicated mode. In this paper, we propose novel combined share/dedicated resource allocation scheme enabling the D2D users to utilize the radio resources in both modes simultaneously. To that end, we propose a graph theory-based framework for efficient resource allocation. Within this framework, neighborhood relations between the cellular users and the D2D users and between the individual D2D users are derived to form graphs. Then, the graphs are decomposed into subgraphs to identify resources, which can be reused by other users so that capacity of the D2D users is maximized. The results show that the sum D2D capacity is increased from 1.67 and 2.5 times (depending on a density of D2D users) when compared to schemes selecting only between shared or dedicated modes.