Abstract
The emerging non-orthogonal multiple access (NOMA) has been considered as a promising technology to reach the goals of 5G cellular systems. Due to its superior spectral efficiency, the NOMA has attracted a lot of attention recently, and could play a vital role in improving the capacity of future Heterogeneous networks (HetNets). In this paper, we present a joint bandwidth control scheme, which incorporates both NOMA and orthogonal multiple access (OMA) modes into one unified scheme. For the effective collaboration of different multiple access methods, we adopt the ideas of cooperative bargaining solution concepts. In the proposed scheme, the bandwidth allocation process for base stations and channels follows the OMA mode, and mobile devices within a same channel form a group. The power level selection process for mobile devices in each group follows the NOMA mode. In the OMA mode, traditional Nash bargaining solution is adopted to allocate bandwidth resources. In the NOMA mode, groups of individual devices bargain both within and across groups based on the group bargaining solution. Under the dynamic changing HetNet environments, our joint bargaining approach takes various benefits in a rational way while maximizing the bandwidth efficiency. Comprehensive numerical experiments are provided to show that the performance of our proposed scheme is superior to existing HetNet spectrum control protocols.
Highlights
With the rapid developments of mobile network technologies, wireless communication has become one of the best business opportunities of the future
MAIN CONTRIBUTIONS According to the Nash Bargaining Solution (NBS) and group bargaining solutions (GBSs), we develop a novel bandwidth control scheme for the Heterogeneous networks (HetNets) platform
The ideas of NBS and GBS are adopted by taking into account the hybrid orthogonal multiple access (OMA)-non-orthogonal multiple access (NOMA) system platform
Summary
With the rapid developments of mobile network technologies, wireless communication has become one of the best business opportunities of the future. In the HetNet infrastructure, multiple small cells are located in each macro cell area, and they work together in a coordinated manner to unlock substantial gains in network capacity and user connectivity experience. Different bargaining game solutions have made revolutionary impacts on a large number of disciplines ranging from resource management, power control, load balancing, fault tolerance, or even network security in HetNet systems [8]. In the combination of NOMA and OMA technologies, we apply two different bargaining solutions, i.e., NBS and GBS, for the HetNet infrastructure. Based the OMA-NOMA integrated platform, the limited bandwidth resource is effectively distributed between BSs and MDs by using different cooperative bargaining solutions. In comparison with other existing state-of-the-art HetNet bandwidth control protocols, we can enhance the overall system performance
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