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引用次数: 0
摘要
摘要 能够在单个网络内交换数据的智能设备数量的快速增长,导致出现了能够使数据传输技术适应物联网网络的机制。其中之一就是 802.11ah 标准中提出的周期性限制访问窗口(PRAW)机制。合理选择 PRAW 机制的参数可以让大量传感器快速、节能地传输数据,但 802.11ah 标准本身并没有给出参数选择建议。本文解决了以下优化问题:最小化 (a) 平均延迟;(b) 满足平均延迟限制时每个传输数据包的平均能耗;(c) 满足两个指标限制时 PRAW 机制消耗的信道时间份额。根据这些问题的求解结果,我们给出了针对由数据包生成强度和站点数量决定的不同网络负载选择 PRAW 参数的建议。
Performance Study of the PRAW Mechanism with Slots of Arbitrary Duration in Wi-Fi HaLow Networks
Abstract—The rapid growth in the number of smart devices capable of exchanging data within a single network leads to the emergence of mechanisms that allow adapting data transmission technologies to the Internet of Things networks. One of them is the mechanism of the periodic restricted access window (PRAW) presented in the 802.11ah standard. A competent choice of parameters of the PRAW mechanism allows a large number of sensors to transmit data quickly and energy-efficiently, but the 802.11ah standard itself does not give recommendations on their choice. This article solves the following optimization problems: minimizing (a) the average delay, (b) the average energy consumption per transmitted packet when the average delay limit is met, and (c) the share of channel time consumed by the PRAW mechanism when the restrictions on both metrics are met. Based on the results of solving these problems, we give recommendations on the choice of PRAW parameters for different network loads determined by the intensity of packet generation and the number of stations.
期刊介绍:
Journal of Communications Technology and Electronics is a journal that publishes articles on a broad spectrum of theoretical, fundamental, and applied issues of radio engineering, communication, and electron physics. It publishes original articles from the leading scientific and research centers. The journal covers all essential branches of electromagnetics, wave propagation theory, signal processing, transmission lines, telecommunications, physics of semiconductors, and physical processes in electron devices, as well as applications in biology, medicine, microelectronics, nanoelectronics, electron and ion emission, etc.