Resource Allocation for Non-Orthogonal Multiple Access (NOMA) Enabled LPWA Networks

Kaihan Li, Fatma Benkhelifa, Julie McCann

Research output: Chapter in Book/Report/Conference proceedingConference proceedingpeer-review

5 Citations (Scopus)
3 Downloads (Pure)

Abstract

In this paper, we investigate the resource allocation for uplink non-orthogonal multiple access (NOMA) enabled low-power wide-area (LPWA) networks to support the massive connectivity of users/nodes. Here, LPWA nodes communicate with a central gateway through resource blocks like channels, transmission times, bandwidths, etc. The nodes sharing the same resource blocks suffer from intra-cluster interference and possibly inter-cluster interference, which makes current LPWA networks unable to support the massive connectivity. Using the minimum transmission rate metric to highlight the interference reduction that results from the addition of NOMA, and while assuring user throughput fairness, we decompose the minimum rate maximization optimization problem into three sub- problems. First, a low-complexity sub-optimal nodes clustering scheme is proposed assigning nodes to channels based on their normalized channel gains. Then, two types of transmission time allocation algorithms are proposed that either assure fair or unfair transmission time allocation between LPWA nodes sharing the same channel. For a given channel and transmission time allocation, we further propose an optimal power allocation scheme. Simulation evaluations demonstrate approximately 100dB improvement of the selected metric for a single network with 4000 active nodes
Original languageEnglish
Title of host publicationIEEE Global Communications Conference (GLOBECOM)
PublisherIEEE
Number of pages6
ISBN (Electronic)978-1-7281-0962-6
ISBN (Print)978-1-7281-0963-3
DOIs
Publication statusPublished - 27 Feb 2020
Externally publishedYes
Event2019 IEEE Global Communications Conference (GLOBECOM) - Waikoloa, United States
Duration: 9 Dec 201913 Dec 2019

Publication series

Name2019 IEEE Global Communications Conference, GLOBECOM 2019 - Proceedings

Conference

Conference2019 IEEE Global Communications Conference (GLOBECOM)
Country/TerritoryUnited States
CityWaikoloa
Period9/12/1913/12/19

Bibliographical note

© 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

Keywords

  • Channel allocation
  • Interference cancellation
  • Internet-of-Things (IoT)
  • LoRa
  • Low-power wide-area (LPWA) networks
  • Power allocation
  • Spreading factor (SF) allocation
  • Throughput fairness
  • Uplink NOMA

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Hardware and Architecture
  • Information Systems
  • Signal Processing
  • Information Systems and Management
  • Safety, Risk, Reliability and Quality
  • Media Technology
  • Health Informatics

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