Cooperative Non-Orthogonal Multiple Access for Future Wireless Communications
Journal Title: EAI Endorsed Transactions on Industrial Networks and Intelligent Systems - Year 2018, Vol 5, Issue 17
Abstract
There is a huge demand for increased connectivity and reliability of devices in the fifth generation and beyond of wireless communications so as to ensure massive connectivity and high spectral efficiency. Recently, power domain non-orthogonal multiple access (NOMA) has received considerable attention as a promising multiple access scheme to improve spectrum efficiency. It allows multiple users to share both time and frequency resources by adjusting the power allocation ratio. However, with ever-increasing mobile users and machines in future wireless environments, NOMA still suffers from some challenges such as a limited connectivity, channel uncertainty and a trade-off between throughput and user fairness. Therefore, an opportunity exists for developing NOMA features in a cooperation of such devices. In this paper, we focuses on exploring cooperative power-domain NOMA systems to maximize potential and develops an effective multiple access for next generation wireless systems. To explore the trade-off of the cooperative NOMA system between its performance and the network complexity, several NOMA systems along with various techniques are introduced. Firstly, a joint NOMA and partial relay selection is introduced to improve both system throughput and user fairness. Secondly, a cooperative NOMA scheme which uses a cognitive radio network as an underlay is also introduced. In this work, a cooperative scheme is used to enhance the outage performance at a cell-edge user for user fairness and NOMA aims to improve spectral efficiency. Finally, an opportunistic NOMA under unreliable wireless backhauls and fronthaul channel uncertainty is introduced and two opportunistic selection rules are applied to a joint NOMA scheme and cooperated transmission. In this work,the impact of unreliable wireless backhauls and fronthaul channel uncertainty on the coordinated NOMA system is examined.
Authors and Affiliations
Sunyoung Lee
Keywords
Related Articles
- EP ID EP46094
- DOI http://dx.doi.org/10.4108/eai.19-12-2018.156078
- Views 299
- Downloads 0
Ant Colony Optimization Based Model Checking Extended by Smell-like Pheromone
Model Checking is a technique for automatically checking the model representing software or hardware about whether they satisfy the corresponding specifications. Traditionally, the model checking uses deterministic algor...
Information seeking behaviour and purchasing decision: case study in digital cameras
This case study explores the information seeking behaviour of digital camera consumers based on Assael’s consumer information acquisition and processing model. 135 responses were received from potential target group who...
Scalable SOCP-based localization technique for wireless sensor network
Node localization is one of the essential requirements to most applications of wireless sensor networks. This paper presents a detailed implementation of a centralized localization technique for WSNs based on Second Orde...
Outage Probability of Vehicular Networks under Unreliable Backhaul
This paper presents for the first time a heterogeneous vehicular model with multiple moving small cells and a moving receiver with unreliable backhaul. In this system, a macro-base station connects to multiple moving smal...
Data network related to an object manufacturing inside of exerted Intelligent System
Most of today’s information systems are not fully integrated. Companies, suppliers, and customers are rarely closely linked. Functions within a chain from the enterprise to the shop floor level are not fully integrated....