WETX: a weighted expected transmission routing metric for diversity in wireless sensor networks

Sofiane Moad*, Morten Tranberg Hansen, Raja Jurdak, Brano Kusy, Nizar Bouabdallah

*Corresponding author for this work

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

1 Citation (Scopus)


The expected number of transmission (ETX) metric represents the link quality for links in Wireless Sensor Networks (WSNs) that can vary for different radios. To adapt to these differences, radio diversity is a recent explored solution for wireless sensor networks. In this paper, we show that in a multi radio environment it is not enough to only choose a next hop based on link qualities as with the popular ETX metric. In such an environment, the cost of transmission and reception is radio specific, which needs to be considered when making a routing decision. Instead, we propose a scheme that explores the diversity in ETX over radios and therefore enables a node to choose an energy efficient link by considering a new metric WETX, for weighted ETX. We show by both analysis and simulation that our proposal can improve the energy consumption in a network and extend the network lifetime with up of 60%.

Original languageEnglish
Title of host publication2011 IFIP wireless days, WD 2011
Place of PublicationPiscataway, NJ
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Number of pages7
ISBN (Electronic)9781457720284 , 9781457720260
ISBN (Print)9781457720277
Publication statusPublished - 2011
Externally publishedYes
Event2011 IFIP Wireless Days, WD 2011 - Niagara Falls, ON, Canada
Duration: 10 Oct 201112 Oct 2011


Other2011 IFIP Wireless Days, WD 2011
CityNiagara Falls, ON


  • energy efficiency
  • ETX
  • MIMO
  • SISO
  • Wireless sensor networks


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