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  • Energy Efficient Resource Allocation for Uplink LoRa Networks

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Energy Efficient Resource Allocation for Uplink LoRa Networks

Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSNConference contribution/Paper

Published
Publication date9/12/2018
Host publication2018 IEEE Global Communications Conference (GLOBECOM)
PublisherIEEE
Number of pages6
ISBN (Electronic)9781538647271
Original languageEnglish
EventIEEE Global Communications Conference 2018 - Abu Dhabi, United Arab Emirates
Duration: 9/12/201813/12/2018
http://globecom2018.ieee-globecom.org/

Conference

ConferenceIEEE Global Communications Conference 2018
Abbreviated titleIEEE GLOBECOM 2018
CountryUnited Arab Emirates
CityAbu Dhabi
Period9/12/1813/12/18
Internet address

Conference

ConferenceIEEE Global Communications Conference 2018
Abbreviated titleIEEE GLOBECOM 2018
CountryUnited Arab Emirates
CityAbu Dhabi
Period9/12/1813/12/18
Internet address

Abstract

In this paper, we investigate energy efficiency for uplink LoRa, which is one of the most promising and widely deployed low-power wide-area (LPWA) networks. In the considered networks, we explore user scheduling, spreading factor (SF) assignment, and power allocation jointly. A nonconvex optimization problem for maximizing the system energy efficiency is formulated, with targeted SNR requirement and power range as constraints for each LoRa user. To solve this problem, we first propose a low-complexity suboptimal algorithm, which includes energy-efficient user scheduling and heuristic SF assignment for scheduled users based on matching theory. Then a novel power allocation based on Charnes-Cooper transformation is proposed to transform the fractional objective into the convex form to maximize the system energy efficiency. Simulation results show that the proposed algorithms achieve near-optimal performance in terms of energy efficiency.

Bibliographic note

©2018 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.