A cross-layer approach to reduce channel access delay jitter in IEEE 802.11 WLANs

Sangheon Pack, Kihun Kim, Wonjung Kim, Taewon Song, Seongman Min

Research output: Contribution to journalArticle

6 Citations (Scopus)


In this paper, we propose a consistent random backoff (CRB) scheme to reduce the channel access delay jitter in voice over wireless local area networks. In the CRB scheme, a contention window (CW) size at each backoff stage is determined by hashing the session identifier and the talk spurt index. Therefore, all packets in the same talk spurt of a session have the same CW sizes if they are transmitted at the same backoff stage. Since a modulo-division operation with the identical maximum CW value is applied, fairness with the legacy backoff scheme (i.e.; binary exponential backoff) is also provided. Extensive simulation results demonstrate that the CRB scheme can reduce the channel access delay jitter by 54 %.

Original languageEnglish
Pages (from-to)1379-1390
Number of pages12
JournalWireless Personal Communications
Issue number4
Publication statusPublished - 2013 Apr 1



  • Binary exponential backoff
  • Consistent hashing
  • Consistent random backoff
  • Voice over WLANs

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering

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