An optimal clear channel assessment in IEEE 802.15.4 medium access control protocol for recurrent data transmission and long acknowledgement wait period,Transactions on Emerging Telecommunications Technologies

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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
Transactions on Emerging Telecommunications Technologies ( IF 2.5 ) Pub Date : 2020-11-06 , DOI: 10.1002/ett.4167
Manjunath G. Asuti ₁ , Prabhugoud I. Basarkod ₁

Affiliation

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.

中文翻译：

IEEE 802.15.4介质访问控制协议中针对循环数据传输和较长确认等待时间的最佳畅通信道评估

在诸如物联网，智能电网和智能城市等当前技术中，IEEE 802.15.4标准媒体访问控制（MAC）协议被广泛用于短距离通信。IEEE 802.15.4标准采用具有冲突避免信道访问机制的载波侦听多路访问，该机制执行两个连续的畅通信道评估（CCA）。但是，在启用星形拓扑的无线传感器网络（WSN）中，执行两个连续的CCA可能不适用于所有类型的网络方案。在本文中，我们开发了一种最佳的CCA信道访问机制，以解决在启用星型拓扑的WSN中考虑的两个网络方案中遇到的循环数据传输和较长的确认等待时间。为了达到这些要求，所提出的方法执行五个连续的CCA，以成功进行数据传输，而无需进入下一个退避阶段。最初，开发了精确的马尔可夫链模型。后来，为提出的方法开发了一组数学表达式。该模型已使用MATLAB 2017a编程工具进行了验证。仿真结果表明，该方法在信道冲突时间，延迟，可靠性，冲突概率，丢包率和成功数据传输的概率方面优于现有的CCA方法。

更新日期：2020-11-06

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