Next Article in Journal
Previous Article in Journal
Sensors 2012, 12(4), 5067-5104; doi:10.3390/s120405067
Article

Performance Analyses and Improvements for the IEEE 802.15.4 CSMA/CA Scheme with Heterogeneous Buffered Conditions

, *  and
Received: 8 March 2012; in revised form: 26 March 2012 / Accepted: 16 April 2012 / Published: 19 April 2012
(This article belongs to the Section Sensor Networks)
View Full-Text   |   Download PDF [1165 KB, uploaded 21 June 2014]
Abstract: Studies of the IEEE 802.15.4 Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) scheme have been received considerable attention recently, with most of these studies focusing on homogeneous or saturated traffic. Two novel transmission schemes—OSTS/BSTS (One Service a Time Scheme/Bulk Service a Time Scheme)—are proposed in this paper to improve the behaviors of time-critical buffered networks with heterogeneous unsaturated traffic. First, we propose a model which contains two modified semi-Markov chains and a macro-Markov chain combined with the theory of M/G/1/K queues to evaluate the characteristics of these two improved CSMA/CA schemes, in which traffic arrivals and accessing packets are bestowed with non-preemptive priority over each other, instead of prioritization. Then, throughput, packet delay and energy consumption of unsaturated, unacknowledged IEEE 802.15.4 beacon-enabled networks are predicted based on the overall point of view which takes the dependent interactions of different types of nodes into account. Moreover, performance comparisons of these two schemes with other non-priority schemes are also proposed. Analysis and simulation results show that delay and fairness of our schemes are superior to those of other schemes, while throughput and energy efficiency are superior to others in more heterogeneous situations. Comprehensive simulations demonstrate that the analysis results of these models match well with the simulation results.
Keywords: performance evaluation; IEEE 802.15.4 CSMA/CA; heterogeneous unsaturated networks; OSTS/BSTS schemes; Markov chains; M/G/1/K theory; WSNs performance evaluation; IEEE 802.15.4 CSMA/CA; heterogeneous unsaturated networks; OSTS/BSTS schemes; Markov chains; M/G/1/K theory; WSNs
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.

Export to BibTeX |
EndNote


MDPI and ACS Style

Zhu, J.; Tao, Z.; Lv, C. Performance Analyses and Improvements for the IEEE 802.15.4 CSMA/CA Scheme with Heterogeneous Buffered Conditions. Sensors 2012, 12, 5067-5104.

AMA Style

Zhu J, Tao Z, Lv C. Performance Analyses and Improvements for the IEEE 802.15.4 CSMA/CA Scheme with Heterogeneous Buffered Conditions. Sensors. 2012; 12(4):5067-5104.

Chicago/Turabian Style

Zhu, Jianping; Tao, Zhengsu; Lv, Chunfeng. 2012. "Performance Analyses and Improvements for the IEEE 802.15.4 CSMA/CA Scheme with Heterogeneous Buffered Conditions." Sensors 12, no. 4: 5067-5104.


Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert