Abstract
This paper examines the resource block and power allocation in the power domain non-orthogonal multiple access (PD-NOMA) based cellular device-to-device (D2D) systems. To improve the energy efficiency of the D2D systems and to manage the mutual interference level as well as the quality of service (QoS) requirement of cellular users, different power level is applied to the D2D users sharing the same resource blocks (RBs) to the legacy users. It is essential to design an efficient resource block and power allocation method for PD-NOMA based cellular D2D systems which guarantee the successive interference cancellation (SIC) order in the power allocation solution. In this paper, we propose an iterative algorithm of resource block and power allocation for cellular D2D system which incorporates the SIC aware geometric water filling (GWF) method in the power allocation solution. It is shown that the proposed SIC aware geometric water filling achieves higher energy efficiency compared to iterative water-filling (IWF) power allocation and the GWF based orthogonal multiple access (OMA) method.
Highlights
The ever-increasing number of mobile applications and user demands eventually diverse on new technological and architectural solutions for the energy and spectrum efficient generation of cellular networks (i.e., 5G networks)
We present some numerical results for energy-efficient resource allocation in power domain non-orthogonal multiple access (PD-non-orthogonal multiple access (NOMA)) supported a single cell cellular D2D system
The sum-rate performance of geometric water filling (GWF) is better than iterative water-filling (IWF) based PD-NOMA method because, in the radio resource (i.e., resource blocks (RBs)) allocation, the Hungarian matching algorithm finds one-to-one matching solution for D2D and cellular user depending on the highest channel gain and successive interference cancellation (SIC) constraint
Summary
The ever-increasing number of mobile applications and user demands eventually diverse on new technological and architectural solutions for the energy and spectrum efficient generation of cellular networks (i.e., 5G networks). The next-generation cellular networks consider the non-orthogonal multiple access (NOMA) technique as a candidate solution. In the NOMA supported D2D communication, the D2D, and cellular users utilize the same spectrum in a non-orthogonal way. We consider the resource allocation problem in PD-NOMA supported cellular D2D networks. We investigate the energy efficiency factor of cellular D2D systems utilizing PD-NOMA method.The non-orthogonal resource allocation problem of cellular D2D systems need to address the following issues:. We formulate a joint radio resource and power allocation optimization problem of PD-NOMA supported cellular D2D systems with the objective to maximize the energy efficiency of the D2D system. We consider the above issues in the PD-NOMA based cellular D2D resource allocation problem
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