An efficient HARQ scheme for applications in multicast communication systems

Francesco Chiti, Romano Fantacci*, Andrea Tassi

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

8 Citations (Scopus)


This paper deals with the performance evaluation and optimization of an efficient hybrid automatic repeat request (HARQ) scheme suitable for applications delivered over lossy multicast communication channels. In particular, different from previously investigated strategies, this paper proposes a modified HARQ scheme based on the symbol combining principle (MHARQ-SC) where multiple copies of a same packet are consecutively transmitted at each transmission opportunity. By considering as the performance metrics, the mean packet delivery delay, and the energy consumption per information packet, this paper presents suitable performance evaluation and optimization strategies tailored for multicast communications. For the sake of comparisons, it has been also analyzed, under the same operational conditions, the performance of different HARQ schemes optimized for multicast communications. Numerical results have been provided to validate the proposed performance evaluation and optimization approaches in the case of the MHARQ-SC scheme. An important result devised here is that the reported analytical results clearly highlight the performance gain of the proposed strategy in comparison with all the other considered alternatives.

Original languageEnglish
Pages (from-to)1131-1141
Number of pages11
JournalWireless Communications and Mobile Computing Special Issue: Ultrawideband for Wireless Communications
Issue number7
Publication statusPublished - 1 May 2015


  • HARQ scheme
  • lossy multicast wireless networks
  • multicast delay optimization


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