A resource allocation mechanism for enhancing spectral efficiency and throughput of multi-link D2D communications

Abstract

In this paper, we consider downlink resource allocation of a cellular user to group of device-to-device (D2D) communication pair to enhance the overall system throughput and achieve higher spectral efficiency in mobile cloud. A mobile cloud can be defined as an opportunistic cooperative cluster of wireless devices in close proximity which are capable to communicate to other devices while preserving their connection to an overlay cellular access network (i.e., eNB), simultaneously. Thus this study considers D2D communications from a novel and wider perspective, assuming that multiple D2D communication links are simultaneously supported. We model, formulate and analyze the overall throughput of the mobile cloud as the function of distance between communication devices when the D2D pairs communicate in cellular, dedicated and reuse modes. In cellular and dedicated modes there is no severe intra-cell interference but for the reuse mode we propose an innovative and practical downlink resource allocation mechanism to coordinate the interferences and maximize the system sum-rate when several D2D pairs communicate by reusing the resources of a cellular user. In fact, the eNB as the centralized decision-maker selects a cellular user equipment (UE) and group of D2D pairs to communicate by reusing the downlink resources of the selected cellular UE while it guarantees the SINR at both the cellular and D2D receivers. Numerical results show that by exploiting the proposed mechanism we can achieve the aforementioned goals.

Fog Computing as an Enabler for Immersive Media: Service Scenarios and Research Opportunities

“…1(b), when immersive media are exchanged between the UEs and the F-APs, advanced resource allocation, interference cancellation, and wireless transmission mechanisms are required. Even though several studies have been conducted in these directions [101]- [103], further research is necessary, especially from perspectives of practical deployments, to examine whether it is feasible to obtain high reliability and low latency.…”

Throughput Improvement in Cellular Networks via Full-Duplex Based Device-to-Device Communications

“…Furthermore, authors in [25] proposed an FD-relaying scheme to enable the operation of underlaying D2D-cellular networks. In addition, the throughput-maximization problem in FD-D2D mode has been formulated and solved by employing the schemes of resource sharing [26] and power allocation [27]. Last but not least, all the above-mentioned works have considered a relatively simple scenario (i.e.…”

Distributed beamforming algorithm based on game theory in device-to-device communications

“…In addition, Bagheri and Katz 16 and Pratas and Popovski 17 discussed the problem of downlink channel resources for D2D communication multiplexing cellular communication in single-antenna base station system. Bagheri and Katz 16 proposed a downlink resource allocation scheme for D2D communication to improve throughput and spectrum utilization for the entire system. Pratas and Popovski 17 considered network-assisted D2D communication systems that allow fixed-rate connections to reuse cellular downlink resources.…”