Paper Info
Title
Dynamic User Pairing and Power Allocation for Throughput Maximization in NOMA Systems
Abstract
Non-orthogonal multiple access (NOMA) can enhance the spectral efficiency of the fifth generation (5G) wireless networks. System level optimization on power allocation and user pairing for improving the throughput of NOMA systems has been well studied. However, most of the existing works have not taken into account dynamic traffic arrival and possible packet transmission failure. In this paper, we consider downlink transmission of a power-domain NOMA system with dynamic packet arrival, where the base station supports both NOMA and orthogonal multiple access (OMA). We propose a packet-level scheduling scheme for the base station to decide using either NOMA or OMA, and to determine user pairing and power allocation, with an objective to maximize the aggregate throughput. To tackle the challenges introduced by dynamic packet arrivals and possible transmission failure, we first derive the probability of successful packet transmission with limited feedback on channel state information (CSI). We then formulate a throughput maximization problem as a stochastic network optimization problem taking into account the backlog stabilities. We decompose the problem into two subproblems for NOMA and OMA, respectively, and obtain the optimal user pairing and power allocation. Packet-level simulations show that the proposed scheme obtains a higher throughput compared with the distance-based user pairing scheme and the CSI-based power allocation scheme.
Year
DOI
Venue
2019
10.1109/ICCW.2019.8756777
2019 IEEE International Conference on Communications Workshops (ICC Workshops)
Keywords
Field
DocType
CSI-based power allocation scheme,dynamic user pairing,NOMA systems,nonorthogonal multiple access,fifth generation wireless networks,system level optimization,account dynamic traffic arrival,downlink transmission,power-domain NOMA system,dynamic packet arrival,base station,orthogonal multiple access,OMA,packet-level scheduling scheme,aggregate throughput,throughput maximization problem,stochastic network optimization problem,optimal user pairing,packet-level simulations,transmission failure,packet transmission,distance-based user pairing scheme,packet transmission failure
Base station,Noma,Wireless network,Scheduling (computing),Computer science,Network packet,Computer network,Spectral efficiency,Throughput,Channel state information
Conference
ISSN
ISBN
Citations 
2474-9133
978-1-7281-2374-5
0
PageRank 
References 
Authors
0.34
9
4
Name
Order
Citations
PageRank
Cinnie Hsiung100.34
Rui Huang26123.21
Yong Zhou311514.81
Vincent W.S. Wong4538.16