Low-complexity collision detection scheme using pseudo-coded ON-OFF pilot transmission per-packet for Wireless Sensor Networks

Fawaz Alassery, Walid K.M. Ahmed, Mohsen Sarraf, Victor Lawrence

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


Power consumption minimization in Wireless Sensor Networks (WSNs) has been discussed extensively in literature. Usually, a central node (a receiver) in WSNs consumes large amount of power due to the necessity to decode every received packet regardless of the fact that the transmission may suffer from packets collision. Current collision detection mechanisms in WSNs have largely been revolving around direct demodulation and full decoding of received packets. The obvious drawback of full decoding of a received packet is the need to expend a significant amount of energy and processing complexity in order to fully-decode a packet, only to discover the packet is illegible due to a collision. In this paper, we propose a suite of novel, yet simple and power-efficient technique to detect a collision at the receiver side of WSNs without the need for full-decoding of the received packet. Our novel approach aims at detecting collision through fast examination of the signal statistics of a short snippet of the received packet via a relatively small number of computations over a small number of received IQ samples. We also present a complexity and power-saving comparison between our novel approach and a conventional full-decoding approach (Log-MAP algorithm) to demonstrate the significant power and complexity saving advantage of our approach. In addition, we demonstrate how to tune various design parameters in order to allow a system designer multiple degrees of freedom for design trade-offs and optimization.

Original languageEnglish
Title of host publication2015 36th IEEE Sarnoff Symposium
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages6
ISBN (Electronic)9781467380423
StatePublished - 10 Nov 2015
Externally publishedYes
Event36th IEEE Sarnoff Symposium, Sarnoff 2015 - Newark, United States
Duration: 20 Sep 201522 Sep 2015

Publication series

Name2015 36th IEEE Sarnoff Symposium


Conference36th IEEE Sarnoff Symposium, Sarnoff 2015
Country/TerritoryUnited States


  • Collisions Detection
  • Low Computational Complexity
  • Power Efficient Protocol
  • Zero-Power Pilot Transmission


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