Sub-Channel Allocation for Device-to-Device Underlaying Full-Duplex mmWave Small Cells using Coalition Formation Games

TL;DR

This paper proposes a coalition formation game-based sub-channel allocation method for D2D underlaying full-duplex mmWave small cells, enhancing system throughput and fairness in 5G networks.

Contribution

It introduces a novel cooperative sub-channel allocation approach using coalition formation games with proven convergence and improved system throughput.

Findings

Achieves near-optimal sum throughput in simulations.

Demonstrates low complexity with few switch operations.

Improves fairness by setting a minimum transmission rate.

Abstract

The small cells in millimeter wave (mmWave) have been utilized extensively for the fifth generation (5G) mobile networks. And full-duplex (FD) communications become possible with the development of self-interference (SI) cancellation technology. In this paper, we focus on the optimal allocation of the sub-channels in the small cells deployed densely underlying the mmWave networks. In order to improve the resource utilization and network capacity, device-to-device (D2D) communications are adopted in networks. For maximizing the system throughput, we propose a cooperative sub-channel allocation approach based on coalition formation game, and theoretically prove the convergence of the proposed allocation algorithm. The utility of the coalition formation game is closely related to the sum system throughput in this paper, and each link makes an individual decision to leave or join any coalition based on the principle of maximizing the utility. Besides, a threshold of the minimum transmission rate is given to improve the system fairness. Through extensive simulations, we demonstrate that our proposed scheme has a near-optimal performance on sum throughput. In addition, we verify the low complexity of the proposed scheme by simulating the number of switch operations.