Message-Passing-Based Joint User Association and Time Allocation for Wireless Powered Communication Networks

Hongju Lee, Jihwan Moon, Changick Song, Sang Hyun Lee, Inkyu Lee

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


This work develops a joint design of user association and time allocation for wireless powered communication networks. A harvest-then-transmit protocol is applied with base stations (BSs) transfer wireless energy to users in the first downlink phase. Then, the users utilize the harvested energy for their information transmission to the BS in the subsequent uplink phase. In this configuration, we employ a general $\alpha $ -fair utility to maximize the network throughput. In particular, the maximization of sum-rate, proportional fairness and minimum rate are investigated individually. We introduce a new message-passing based framework to provide an efficient distributed solution for the user association and optimize the time allocation between the downlink and uplink phase. To achieve this joint goal, each user selects a BS in a distributed manner to maximize the $\alpha $ -fair utility. After identifying the user association, the time allocation is determined by an efficient line search technique. Simulation results show that the proposed algorithm outperforms existing approaches.

Original languageEnglish
Pages (from-to)34-47
Number of pages14
JournalIEEE Transactions on Wireless Communications
Issue number1
Publication statusPublished - 2022 Jan 1

Bibliographical note

Funding Information:
This work was supported in part by the National Research Foundation of Korea (NRF) Grant through the Ministry of Science and ICT (MSIT), Korea Government, under Grant 2017R1A2B3012316 and Grant 2019R1A2C1084855, in part by the Basic Science Research Program through the Ministry of Education under Grant 2021R1I1A3050126, in part by the Information Technology Research Center (ITRC) supervised by the Institute of Information Communications Technology Planning and Evaluation (IITP) under Grant IITP-2020-0-01749, and in part by the Korea University Grant.

Publisher Copyright:
© 2002-2012 IEEE.


  • Wireless powered communication networks
  • message-passing algorithm
  • time allocation
  • user association

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics


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