Reliable multicast with local retransmission and FEC using Group-Aided Multicast scheme

Alex Fung, Iwao Sasase

Research output: Contribution to journalArticlepeer-review


In reliable multicast, feedback and recovery traffic limit the performance and scalability of the multicast session. In this paper, we present an improvement to the many-to-many reliable multicast protocol, Group-Aided Multicast protocol (GAM), with a local-group based recovery by making use of forward error correction (FEC) locally in addition to NACK/retransmission. In contrast to the original GAM, which only makes use of NACK-based recovery, our scheme produces FEC packets and multicasts the packets within the scope of a local group in order to correct uncorrelated errors of the local members in each group of the multicast session, which reduces the need for NACK/retransmission. By using our scheme, redundancy traffic can be localized in each group within a multicast session, and the overall recovery traffic can be reduced.

Original languageEnglish
Pages (from-to)811-818
Number of pages8
JournalIEICE Transactions on Communications
Issue number3
Publication statusPublished - 2009 Mar


  • Error correcting code
  • Many-to-many
  • Reliable multicast

ASJC Scopus subject areas

  • Software
  • Computer Networks and Communications
  • Electrical and Electronic Engineering


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