Next Article in Journal
Street Viewer: An Autonomous Vision Based Traffic Tracking System
Previous Article in Journal
Two Capacitive Micro-Machined Ultrasonic Transducers for Wind Speed Measurement
Article Menu

Export Article

Open AccessArticle
Sensors 2016, 16(6), 815; doi:10.3390/s16060815

Segmentized Clear Channel Assessment for IEEE 802.15.4 Networks

1
School of Electrical and Electronics Engineering, Chung-Ang University, Seoul 06974, Korea
2
Seoul SW-SoC R&BD Center, ETRI, Gyeong-gi 13480, Korea
*
Author to whom correspondence should be addressed.
Academic Editor: Leonhard M. Reindl
Received: 21 January 2016 / Revised: 23 May 2016 / Accepted: 27 May 2016 / Published: 3 June 2016
(This article belongs to the Section Sensor Networks)
View Full-Text   |   Download PDF [2226 KB, uploaded 3 June 2016]   |  

Abstract

This paper proposed segmentized clear channel assessment (CCA) which increases the performance of IEEE 802.15.4 networks by improving carrier sense multiple access with collision avoidance (CSMA/CA). Improving CSMA/CA is important because the low-power consumption feature and throughput performance of IEEE 802.15.4 are greatly affected by CSMA/CA behavior. To improve the performance of CSMA/CA, this paper focused on increasing the chance to transmit a packet by assessing precise channel status. The previous method used in CCA, which is employed by CSMA/CA, assesses the channel by measuring the energy level of the channel. However, this method shows limited channel assessing behavior, which comes from simple threshold dependent channel busy evaluation. The proposed method solves this limited channel decision problem by dividing CCA into two groups. Two groups of CCA compare their energy levels to get precise channel status. To evaluate the performance of the segmentized CCA method, a Markov chain model has been developed. The validation of analytic results is confirmed by comparing them with simulation results. Additionally, simulation results show the proposed method is improving a maximum 8.76% of throughput and decreasing a maximum 3.9% of the average number of CCAs per packet transmission than the IEEE 802.15.4 CCA method. View Full-Text
Keywords: clear channel assessment; carrier sense multiple access with collision avoidance (CSMA/CA); IEEE 802.15.4 clear channel assessment; carrier sense multiple access with collision avoidance (CSMA/CA); IEEE 802.15.4
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Son, K.J.; Hong, S.H.; Moon, S.-P.; Chang, T.G.; Cho, H. Segmentized Clear Channel Assessment for IEEE 802.15.4 Networks. Sensors 2016, 16, 815.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top