Hao Sheng, Zhang Huyin
School of Computer Science, Central China Normal University, Wuhan 430079, China.
School of Computer Science, Wuhan University; Wuhan 430079, China.
Sensors (Basel). 2020 Dec 30;21(1):196. doi: 10.3390/s21010196.
Power-line communication (PLC) networks have been increasingly used for constructing industrial IoT (internet of things) and home networking systems due to their low-cost installation and broad coverage feature. To guarantee the transmission reliability, ARQ (automatic repeat request) scheme is introduced into the link layer of reliable PLC networks, which allows the retransmission of a data frame several times so that it has a higher probability to be correctly received. However, current studies of performance analysis for PLC MAC (medium access control) protocol (i.e., IEEE 1901) do not take into account of the impact of ARQ scheme. To resolve this problem, we propose an analytical model to investigate the MAC performance of IEEE 1901 protocol for reliable PLC networks with ARQ scheme. In the modeling process, we first establish a PLC channel model to reflect the impacts of PLC channel types (containing Rayleigh fading and Log-normal fading), additive non-Gaussian noise feature and ARQ scheme on data transmission at link layer. Next, we employ Renewal theory and Queueing dynamics to capture the transmission attempt behavior of executing IEEE 1901 protocol in the unsaturated environment with finite transit buffer size. On the basis of combining these two models, we derive the closed-form expressions of 1901 MAC metrics considering the influence of the ARQ scheme. Furthermore, we prove that the proposed analytical model has the convergence property. Finally, we evaluate the MAC performance of 1901 protocol for reliable PLC networks with ARQ scheme and verify the proposed analytical model.
由于其低成本安装和广泛覆盖的特点，电力线通信（PLC）网络越来越多地用于构建工业物联网（IoT）和家庭网络系统。为了保证传输可靠性，自动重传请求（ARQ）方案被引入到可靠PLC网络的链路层，该方案允许对数据帧进行多次重传，以便其有更高的概率被正确接收。然而，目前对PLC介质访问控制（MAC）协议（即IEEE 1901）性能分析的研究没有考虑ARQ方案的影响。为了解决这个问题，我们提出了一个分析模型来研究具有ARQ方案的可靠PLC网络中IEEE 1901协议的MAC性能。在建模过程中，我们首先建立一个PLC信道模型，以反映PLC信道类型（包括瑞利衰落和对数正态衰落）、加性非高斯噪声特性以及ARQ方案对链路层数据传输的影响。接下来，我们采用更新理论和排队动力学来捕捉在具有有限传输缓冲区大小的非饱和环境中执行IEEE 1901协议的传输尝试行为。在结合这两个模型的基础上，我们推导了考虑ARQ方案影响的1901 MAC指标的闭式表达式。此外，我们证明了所提出的分析模型具有收敛性。最后，我们评估了具有ARQ方案的可靠PLC网络中1901协议的MAC性能，并验证了所提出的分析模型。
