Maximization of total throughput and device lifetime with non-linear battery properties

Hun Min Shin, Seok Hwan Park, Jaehoon Jung, Sunho Lee, Inkyu Lee

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

This paper considers the maximization of total throughput and device lifetime for point-to-point multiple-input multiple-output communication systems, where a transmission node has a battery which exhibits non-linear battery discharge behaviors. We adopt a battery model called Peukert's law to render the non-linear battery characteristics and formulate the battery constraint from Peukert's law. Then, we prove that the total throughput is a strictly concave function in terms of the battery lifetime under the battery constraint. Also, we derive the optimality conditions for the total throughput maximization and device lifetime maximization problems from the strict concavity, and compute the optimal solutions by a bi-section method. Furthermore, we provide a solution based on asymptotic analysis for the case, where the eigenvalue distribution of the channel matrix is not available. In the simulation section, we conduct accurate battery discharge simulations to validate this paper. We confirm that the analysis matches well with the battery simulations, and the derived optimal scheme outperforms the baseline schemes, which neglect the non-linear battery discharge properties. Also, the proposed solution based on asymptotic analysis is shown to have almost the same performance compared with the optimal solution.

Original languageEnglish
Pages (from-to)7774-7784
Number of pages11
JournalIEEE Transactions on Wireless Communications
Volume16
Issue number12
DOIs
Publication statusPublished - 2017 Dec

Keywords

  • Device lifetime
  • MIMO systems
  • Non-linear battery
  • Total throughput

ASJC Scopus subject areas

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

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