Energy efficiency of hybrid-ARQ systems under QoS constraints

Yi Li, Gozde Ozcan, M. Cenk Gursoy, Senem Velipasalar

Research output: Contribution to conferencePaper

9 Scopus citations

Abstract

In this paper, energy efficiency of hybrid automatic repeat request (HARQ) schemes under QoS constraints is studied in the low power regime by characterizing the minimum energy per bit and wideband slope. The energy efficiency is investigated when either an outage constraint is imposed and (the transmission rate is selected accordingly) or the transmission rate is optimized to maximize the throughput. In both cases, it is also assumed that there is a limitation on the number of retransmissions due to deadline constraints. Under these assumptions, closed-form expressions are obtained for the minimum energy per bit and wideband slope for HARQ with chase combining (CC). Through numerical results, the performances of HARQ-CC and HARQ with incremental redundancy (IR) are compared. Moreover, the impact of deadline constraints, outage probability, QoS constraints on the energy efficiency is analyzed.

Original languageEnglish (US)
DOIs
StatePublished - Jan 1 2014
Event2014 48th Annual Conference on Information Sciences and Systems, CISS 2014 - Princeton, NJ, United States
Duration: Mar 19 2014Mar 21 2014

Other

Other2014 48th Annual Conference on Information Sciences and Systems, CISS 2014
CountryUnited States
CityPrinceton, NJ
Period3/19/143/21/14

Keywords

  • Chase combining
  • energy efficiency
  • hybrid ARQ
  • incremental redundancy
  • minimum energy per bit
  • QoS constraints
  • wideband slope

ASJC Scopus subject areas

  • Information Systems

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  • Cite this

    Li, Y., Ozcan, G., Gursoy, M. C., & Velipasalar, S. (2014). Energy efficiency of hybrid-ARQ systems under QoS constraints. Paper presented at 2014 48th Annual Conference on Information Sciences and Systems, CISS 2014, Princeton, NJ, United States. https://doi.org/10.1109/CISS.2014.6814121