Secure Resource Allocation Framework for Device to Device Communication

Abstract

ABSTRACT newlineThe exponential rise in the use of numerous data-hungry applications, such as live video newlinestreaming, augmented reality, virtual reality, and live conferences, generates massive network newlinetraffic, which degrades the overall network s spectral efficiency. To meet the data requirements newlineof the aforementioned data-hungry applications with quality of service (QoS), newlinethe existing cellular infrastructure needs up-gradation, which is highly expensive. So, to newlineimprove spectral efficiency, researchers proposed a novel device-to-device (D2D) communication newlinetechnology. The primary aim of D2D communication is to increase the network s newlinespectral efficiency by allowing user devices to communicate directly without depending newlineupon the centralized base station (BS). D2D communication offloads the network data newlinetraffic to reduce the burden on BS, considering either overlay or underlay mode. In overlay newlinemode, a dedicated spectrum is allocated to the D2D user (DU), whereas in underlay newlinemode. The DU re-utilizes the cellular user s (CLU s) spectrum. However, the underlay newlinemode degrades the performance of the D2D communication system (DCS), which is newlinedue to severe interference between DUs and CLUs. It includes mutual interference from newlineCLUs-DUs, DUs-CLUs, and between DUs if they utilize the same spectral resource. Mitigating newlineinterference in an underlay DCS is a challenging issue that needs to be managed newlineappropriately. newlineAlso, the existing underlay DCS infrastructure depends on the orthogonal multiple newlineaccess (OMA) scheme for spectral reuse, where one resource block (RB) can serve only newlineone user. Thus, OMA degrades the overall spectral efficiency of the DCS and supports newlinelimited connections, making the overall D2D communication expensive. This issue can newlinebe resolved by involving power domain non-orthogonal multiple access (NOMA) in DCS, newlinewhere one RB can be served among multiple users with varying power levels based on newlinetheir channel conditions. In NOMA, the receiver receives a superimposed signal, and newlinethe successive interference cancellation (SIC) t