Abstract
In 5G networks, device-to-device (D2D) communications have played an important role in enlarging the coverage, relaxing the workload of backhaul links of both macro base stations (MBSs) and small-cell basestations (SBSs), and serving the mobile users (MUs) local applications and service
Highlights
In every generation of mobile networks, the carriers always face the problems of how to provide the proliferation of mobile users (MUs) with high quality of service (QoS) and high resource efficiency
We have witnessed a great achievement in cellular mobile communications that 5G networks have been launched and equipped with many emerging technologies
In B5G networks, besides studying new disruptive solutions that may change the system architecture and require a high cost, it is important to place a high priority on the ones that do not make the system any changes, but are able to ubiquitously serve the everhigh demand of non-stop proliferation of end users (EUs)
Summary
In every generation of mobile networks, the carriers always face the problems of how to provide the proliferation of mobile users (MUs) with high quality of service (QoS) and high resource efficiency. D2D communications enable direct transmission between two MUs over one hop in close proximity This way efficiently mitigates the workload at both the macro base stations (MBSs) and the small-cell base stations (SBSs) and improves system capacity to meet the high data rate of advanced applications and services. All the aspects of D2D MHMP communications from architectures, models, techniques, to applications are investigated insightfully. They are organised, analysed, and evaluated in a systematic and logical way. Together with the discussions on future research directions, we aim to provide both academic and industrial communities with a full understanding about D2D MHMP communications This enables us to propose disruptive solutions for D2D MHMP communications to address many challenges raised by the dense MUs with high QoE demand in B5G networks.
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