Service Differentiation based on Contention Window with Enhanced Collision Resolution LR-WPANs

International Journal of Computer Trends and Technology (IJCTT)          
© 2015 by IJCTT Journal
Volume-19 Number-2
Year of Publication : 2015
Authors : Vandita Grover , Sugandha Gupta
DOI :  10.14445/22312803/IJCTT-V19P116


Vandita Grover , Sugandha Gupta "Service Differentiation based on Contention Window with Enhanced Collision Resolution LR-WPANs". International Journal of Computer Trends and Technology (IJCTT) V19(2):86-90, Jan 2015. ISSN:2231-2803. Published by Seventh Sense Research Group.

Abstract -
The IEEE 802.15.4 MAC [1] standard defines the channel access for low-rate, low-power communication applications such as Wireless Sensor Networks but does not differentiate between high or low priority data. We study few priority based service differentiation mechanisms which distinguish between such data for each and every device, and also let high priority have better channel access as compared to low priority. We also study a mechanism, which improves collision resolution in CSMA algorithms for 802.15.4. In this paper, we propose a service differentiation mechanism for IEEE 802.15.4 based on varying Contention Window parameter and enhance collision resolution. Our proposed algorithm not only deliver service differentiation according to class priority, but also adapts to the backoff exponent according to the channel contention information collected during CCA.

[1] IEEE Standard for Part 15.4: Wireless Medium Access Control Layer(MAC) and Physical Layer(PHY) Specifications for Low Rate Wireless Personal Area Networks (LR-WPANS), Oct 2003.
[2] Eui-Jik Kim, Meejoung Kim, Sung-Kwan Youm, Seokhoon Choi, Chul-Hee Kang, Priority – based service differentiation scheme for IEEE 802.15.4 networks.
[3] Jeong-Gil Ko, Yong-Hyun Cho and Hyogon Kim, Performance Evaluation of IEEE 802.15.4 MAC with Different Backoff Ranges in Wireless Sensor Networks.
[4] Jae Yeol Ha, Tae Hyun Kim, Hong Seong Park, Sunghyun, Choi and Wook Hyun Kwon, An Enhanced CSMA-CA Algorithm for IEEE 802.15.4 LR-WPANs
[5] Marco Naeve, Eaton Corp., IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) [6] Chonggang Wang, Bo Li and Lemin Li, A new collision resolution mechanism to enhance the performance of IEEE 802.11 DCF.
[7] Iyappan Ramachandran, Arindam K.Das and Sunit Roy, Analysis of the Contention Access Period of IEEE 802.15.4 MAC.

IEEE 802.15.4, Service Differentiation, Contention Window, Enhanced Collision Resolution, LR-WPAN.