Performance Analyses and Improvements for the IEEE 802.15.4 CSMA/CA Scheme with Heterogeneous Buffered Conditions
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 S...
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doaj-1c2c7917700b44b692ef2b3e89b31d782020-11-25T00:13:23ZengMDPI AGSensors1424-82202012-04-011245067510410.3390/s120405067Performance Analyses and Improvements for the IEEE 802.15.4 CSMA/CA Scheme with Heterogeneous Buffered ConditionsChunfeng LvZhengsu TaoJianping ZhuStudies 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 <em>M</em>/<em>G</em>/1/<em>K</em> 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.http://www.mdpi.com/1424-8220/12/4/5067performance evaluationIEEE 802.15.4 CSMA/CAheterogeneous unsaturated networksOSTS/BSTS schemesMarkov chains<em>M</em>/<em>G</em>/1/<em>K</em> theoryWSNs |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Chunfeng Lv Zhengsu Tao Jianping Zhu |
spellingShingle |
Chunfeng Lv Zhengsu Tao Jianping Zhu Performance Analyses and Improvements for the IEEE 802.15.4 CSMA/CA Scheme with Heterogeneous Buffered Conditions Sensors performance evaluation IEEE 802.15.4 CSMA/CA heterogeneous unsaturated networks OSTS/BSTS schemes Markov chains <em>M</em>/<em>G</em>/1/<em>K</em> theory WSNs |
author_facet |
Chunfeng Lv Zhengsu Tao Jianping Zhu |
author_sort |
Chunfeng Lv |
title |
Performance Analyses and Improvements for the IEEE 802.15.4 CSMA/CA Scheme with Heterogeneous Buffered Conditions |
title_short |
Performance Analyses and Improvements for the IEEE 802.15.4 CSMA/CA Scheme with Heterogeneous Buffered Conditions |
title_full |
Performance Analyses and Improvements for the IEEE 802.15.4 CSMA/CA Scheme with Heterogeneous Buffered Conditions |
title_fullStr |
Performance Analyses and Improvements for the IEEE 802.15.4 CSMA/CA Scheme with Heterogeneous Buffered Conditions |
title_full_unstemmed |
Performance Analyses and Improvements for the IEEE 802.15.4 CSMA/CA Scheme with Heterogeneous Buffered Conditions |
title_sort |
performance analyses and improvements for the ieee 802.15.4 csma/ca scheme with heterogeneous buffered conditions |
publisher |
MDPI AG |
series |
Sensors |
issn |
1424-8220 |
publishDate |
2012-04-01 |
description |
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 <em>M</em>/<em>G</em>/1/<em>K</em> 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. |
topic |
performance evaluation IEEE 802.15.4 CSMA/CA heterogeneous unsaturated networks OSTS/BSTS schemes Markov chains <em>M</em>/<em>G</em>/1/<em>K</em> theory WSNs |
url |
http://www.mdpi.com/1424-8220/12/4/5067 |
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