Reverse acknowledgment (RA) scheme: Fast detection of retransmission failures for SR-ARQ

Jechan Han, Beomjoon Kim, Dongmin Kim, Jaiyong Lee

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


This letter proposes a simple modification called reverse acknowledgement (RA) scheme to a negative acknowledgement (NAK)-based selective repeat automatic repeat request (SR-ARQ) protocol for its fast loss recovery. By adopting the RA scheme, a NAK-based SR-ARQ receiver can detect and recover retransmission failures without invoking retransmission timeouts (RTOs). By OPNET simulations, we evaluate the performance of the RA scheme in terms of the transport delay and re-sequencing delay and show that the RA scheme considerably improves the performance of NAK-based SR-ARQ.

Original languageEnglish
Pages (from-to)728-730
Number of pages3
JournalIEEE Communications Letters
Issue number10
Publication statusPublished - 2006 Oct

Bibliographical note

Funding Information:
Manuscript received April 14, 2006. The associate editor coordinating the review of this letter and approving it for publication was Dr. Jae Kim. This work was supported by Qualcomm Incorporated through Qualcomm Yonsei CDMA Joint Research Center.

All Science Journal Classification (ASJC) codes

  • Modelling and Simulation
  • Computer Science Applications
  • Electrical and Electronic Engineering


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