Differentiate backoff mechanisms for transmission directions in IEEE 802.11 multihop WLANs

Zhenzhen Cao, Zvi Rosberg, Xun Yang, Yang Xiao

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Distributed Coordinate Functions (DCF) is the mandatory medium access method for IEEE 802.11 Wireless Local Area Networks (WLANs), which is designed for infrastructure WLANs where all end users connect with Access Point (AP) with single-hop links. DCF doubles its Contention Window (CW) before each retransmission. However, in multi-hops WLANs, a node may encounter different kinds of transmission failures from different transmission directions. In this paper, we will point out that, in some situations doubling CW before retransmitting makes DCF exploit the medium inefficiently. We also propose a method to resolve this problem by employing different backoff mechanisms for different transmission directions. NS-2 simulations demonstrate a significant throughput improvement of our enhanced MAC over the native MAC.

Original languageEnglish
Title of host publication2010 IEEE International Conference on Communications, ICC 2010
DOIs
StatePublished - 13 Aug 2010
Externally publishedYes
Event2010 IEEE International Conference on Communications, ICC 2010 - Cape Town, South Africa
Duration: 23 May 201027 May 2010

Publication series

NameIEEE International Conference on Communications
ISSN (Print)0536-1486

Conference

Conference2010 IEEE International Conference on Communications, ICC 2010
Country/TerritorySouth Africa
CityCape Town
Period23/05/1027/05/10

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