On the problem of resource allocation and system capacity evaluation via a blocking queuing model in D2D enabled overlay cellular networks

Abstract

We assume a D2D overlay enabled cellular network where two types of users are considered. D2D enabled users may communicate either via the Base Station (BS) or directly with each other, while cellular users can communicate only via the BS. In this type of network resource blocks (RBs) are split into two different categories, applicable for D2D access and cellular access respectively. We first introduce a blocking queuing model that can be used to effectively represent the process of allocation of resources to the different types of users. Subsequently we address the problem of fair resource assignment by formulating it as a multi-objective optimization problem of minimizing the maximum blocking probability experienced by any type of user in the system. We show that the optimal RBs assignment policy is of threshold type, while an adaptive algorithm to estimate the required parameters of the optimal policy is presented. Through modeling and simulation the achievable system capacity is evaluated and the superiority of the proposed optimal policy is demonstrated.