Optimal Device-to-Device cell association and load balancing

MOCA: Multiobjective Cell Association for Device-to-Device Communications

“…This paper is an extension of the authors' work in [25]. To the best of our knowledge, this was the first work on cell association optimization that explicitly considers the integration of D2D communication paradigm in cellular networks.…”

“…Traffic imbalance phenomena have to be taken into account as, in many cases, the need for direct communication emerges in a rather irregular fashion in space. Further, one of the first works that explicitly considered D2D-centric cell association is [25] which also constitutes the basis of our paper and optimizes cell association with respect to a number of different objectives. Among all, one of the proposed objectives (eq.…”

“…Among all, one of the proposed objectives (eq. (9) in [25]) tries to minimize the network load imbalance (different traffic load per BS) with respect to a number of resource related and D2D link association constraints. Last, in [26], the authors developed a joint framework that considers the user association and transmission mode switching between direct and D2D relay modes in order to improve spectral as well as energy efficiency through a closed-form solution.…”

“…Thus, the obtained decision vector of the aforementioned optimization problem is [y; z]. It was shown in the authors' previous work that simply minimizing the defined overall cost doesn't introduce significant gains compared to cost-aware heuristic methods [25]. It was observed that even though the performance gap is slightly increasing for higher congestion levels, this gain is negligible.…”

Interference-Aware Decoupled Cell Association in Device-to-Device Based 5G Networks

“…Applied in the authors' prior work [5], we extend the cell association optimization logic for D2D links, where the paired devices are both connected to the same serving BS [10]. For this reason, we define the following binary decision variable…”