Enhanced Clear Channel Assessment for Slotted CSMA/CA in IEEE 802.15.4

Patel, Nileshkumar R.; Kumar, Shishir

doi:10.1007/s11277-017-4042-5

Cited by 18 publications

(17 citation statements)

References 9 publications

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“…This parameter estimates the time wasted in packet collisions in the network and it should be as low as possible. Therefore, from Figure 9, it is noticed that there is a significant reduction in the channel collision time of the proposed optimal CCA when compared with the IEEE 802.15.4 standard 3 and enhanced 27 CCA approaches. Therefore, the proposed optimal CCA algorithm increases the number of CCA as more nodes contend for the wireless channel access.…”

Section: Performance Evaluationmentioning

confidence: 95%

“…However, this scheme focuses only on the throughput improvement without analyzing other parameters of the network. Patel and Kumar 27 developed an Enhanced CCA algorithm for CSMA‐CA mechanism, that is, second chance CCA (SC‐CCA) which has reduced the energy consumption of a node and the average MAC delay. Moreover, the NB periods were also found to be reduced during CCA conduction.…”

Section: Related Workmentioning

confidence: 99%

“…Although an enhanced CCA 27 algorithm provided a second chance for performing the CCA without going into the next backoff period may not be suitable for all network scenarios. However, in some network scenarios, nodes may transmit the data continuously up to certain duration or wait for a long acknowledgement signal.…”

Section: Related Workmentioning

confidence: 99%

“…Therefore, when the network size is increased, more number of nodes contends for the channel access mechanism. However, the channel utilization parameter for optimal CCA is reduced in comparison with the IEEE 802.15.4 standard 3 and the enhanced 27 CCA approaches. The proposed method employs additional CCAs for channel access mechanism to avoid the collisions in the network and hence the channel utilization is reduced.…”

Section: Performance Evaluationmentioning

confidence: 99%

“…In addition, the packet loss rate encountered in an optimal CCA is less in comparison with other CCA approaches. On the other hand, the IEEE 802.15.4 standard 3 and enhanced 27 CCA transmits the data without proper channel access mechanism which leads to an increase in probability of collision and channel idle time. Therefore, the proposed optimal CCA is suitable for the network scenarios where more number of nodes contend for the wireless channel access.…”

Section: Performance Evaluationmentioning

confidence: 99%

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An optimal clear channel assessment in IEEE 802.15.4 medium access control protocol for recurrent data transmission and long acknowledgement wait period

Asuti

Basarkod

2020

Trans Emerging Tel Tech

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The IEEE 802.15.4 standard medium access control (MAC) protocol is widely adopted for short‐range communication in current technologies such as Internet of Things, smart grids, and smart cities. The IEEE 802.15.4 standard adopts the carrier‐sense multiple access with collision avoidance channel access mechanism, which performs two consecutive clear channel assessment (CCA). However, performing two consecutive CCA may not be suitable for all types of network scenarios in a star topology‐enabled wireless sensor networks (WSN). In this article, we develop an optimal CCA channel access mechanism to address the recurrent data transmission and the long acknowledgement wait period which is encountered in two network scenarios considered in a star topology‐enabled WSN. To achieve these requirements, the proposed methodology performs five consecutive CCA for successful data transmission without going into the next backoff stage. Initially, an accurate Markov chain model is developed. Later, a set of mathematical expressions are developed for the proposed method. The model is validated using MATLAB 2017a programming tool. Simulation results show that the proposed methodology outperforms the existing CCA approaches in terms of channel collision time, delay, reliability, probability of collision, packet loss rate, and the probability of successful data transmission.

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Section: Performance Evaluationmentioning

confidence: 95%

Section: Related Workmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

Section: Performance Evaluationmentioning

confidence: 99%

Section: Performance Evaluationmentioning

confidence: 99%

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