Accurate analysis of IEEE 802.15.4 slotted CSMA/CA over a real-time wireless sensor network

Wen Tzeng Huang*, Jing Ting Lin, Chin Hsing Chen, Yuan Jen Chang, You Yin Chen

*Corresponding author for this work

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

6 Scopus citations

Abstract

Here, we present the collision probability of the IEEE 802.15.4 slotted Carrier Sense Multiple Access/Collision Avoidance (CSMA/CA) mechanism over a real-time wireless sensor network (RT-WSN), also called a synchronous network system. The "backoff," the random delay of CSMA/CA, can be used to create a probability model and to determine the average packet delay over RT-WSN. The proposed theoretical analysis model was nearly consistent with the simulation and with experimental results. This suggests that the slotted CSMA/CA mechanism cannot be applied effectively to RT-WSN because it cannot avoid a high collision rate with RT-WSN application requirements and, therefore, may waste a great deal of system bandwidth. We found that the packet collision rate increased up to 731% compared to an ideal model with more than 10 users within an RT-WSN. Without improvements in methodology, the high collision rate makes this slotted CSMA/CA mechanism unsuitable for RT-WSN applications.

Original languageEnglish
Title of host publicationSensor Systems and Software - First International ICST Conference, S-CUBE 2009, Revised Selected Papers
Pages98-110
Number of pages13
DOIs
StatePublished - 2010
Event1st International ICST Conference on Sensor Systems and Software, S-CUBE 2009 - Pisa, Italy
Duration: 7 Sep 20099 Sep 2009

Publication series

NameLecture Notes of the Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering
Volume24 LNICST
ISSN (Print)1867-8211

Conference

Conference1st International ICST Conference on Sensor Systems and Software, S-CUBE 2009
Country/TerritoryItaly
CityPisa
Period7/09/099/09/09

Keywords

  • CSMA/CA
  • Collision
  • IEEE 802.15.4
  • Real-time
  • Wireless sensor network

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