期刊名称：International Journal of Computer Trends and Technology
电子版ISSN：2231-2803
出版年度：2015
卷号：19
期号：2
页码：86-90
DOI：10.14445/22312803/IJCTT-V19P116
出版社：Seventh Sense Research Group
摘要：The IEEE 802.15.4 MAC [1] standard defines the channel access for lowrate, lowpower 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.
关键词：IEEE 802.15.4; Service Differentiation; Contention Window; Enhanced Collision Resolution; LR-WPAN
