IEEE 802.11 MAC-level FEC scheme with retransmission combining

Sunghyun Choi, Youngkyu Choi, Inkyu Lee

Research output: Contribution to journalArticlepeer-review

48 Citations (Scopus)


In this paper, we evaluate and enhance the performance of a Forward Error Correction (FEC) scheme for IEEE 802.11 Medium Access Control (MAC). A novel retransmission combining technique is proposed to enhance the performance of the MAC-level FEC scheme. We also identify the problem with the IEEE 802.1 la physical (PHY) layer when it is used with the MAC-level FEC. A new PHY frame format, backward compatible with the original format, is proposed to resolve the problem. Finally, we analytically evaluate the error performance of the MAC-level FEC, and its enhanced performance via retransmission combining and new 802.11a PHY frame format in AWGN environment. Additionally, we present and discuss the results from simulations using TCP/UDP traffic in more realistic channel environments.

Original languageEnglish
Pages (from-to)203-211
Number of pages9
JournalIEEE Transactions on Wireless Communications
Issue number1
Publication statusPublished - 2006 Jan

Bibliographical note

Funding Information:
Manuscript received November 7, 2003; revised November 11, 2004; accepted January 30, 2005. The associate editor coordinating the review of this paper and approving it for publication was Z. Zhang. This research was supported by University IT Research Center Project. Sunghyun Choi and Youngkyu Choi are with Seoul National University, Seoul, Korea (e-mail:; Inkyu Lee is with Korea University, Seoul, Korea (e-mail: Digital Object Identifier 10.1109/TWC.2006.01014.


  • IEEE 802.11 WLAN
  • IEEE 802.11a PHY
  • MAC-level FEC
  • Reed-Solomon (RS) code
  • Retransmission combining

ASJC Scopus subject areas

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


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