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首页> 美国卫生研究院文献>Sensors (Basel Switzerland) >An Energy-Efficient and Adaptive Channel Coding Approach for Narrowband Internet of Things (NB-IoT) Systems
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An Energy-Efficient and Adaptive Channel Coding Approach for Narrowband Internet of Things (NB-IoT) Systems

机译：窄带物联网（NB-IoT）系统的节能自适应信道编码方法

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摘要

Most of the current research work on the Narrowband Internet of Things (NB-IoT) is focused on enhancing its network coverage. Many of the existing NB-IoT channel coding techniques are based on repeating transmission data and control signals as a way of enhancing the network’s reliability and therefore, enabling long-distance transmissions. Although most of these efforts are made at the expense of reducing the energy consumption of the NB-IoT network, they do not always consider the channel conditions. Therefore, this work proposes a novel NB-IoT Energy-Efficient Adaptive Channel Coding (EEACC) scheme. The EEACC approach is a two-dimensional (2D) approach which not only selects an appropriate channel coding scheme based on the estimated channel conditions (dynamically classified as bad, medium or good from initial based on a periodically assessed BLER performance outcome) but also minimizes the transmission repetition number under a pre-assessed probability of successful transmission (based on the ratio of previous successful transmissions over the total number of transmissions). This results in creating a single mixed gradient based on which a higher or lower Modulating Coding Scheme (MCS) is selected on each transmission. It is aimed at enhancing the overall energy efficiency of the network by dynamically selecting the appropriate Modulation Coding Scheme (MCS) number and efficiently minimizing the transmission repetition number. Link-level simulations are performed under different channel conditions (good, medium, or bad) considerations to assess the performance of the proposed up-link adaptation technique for NB-IoT. The obtained results demonstrate that the proposed technique outperforms the existing Narrowband Link Adaptation (NBLA) as well as the traditional repetition schemes in terms of the achieved energy efficiency as well as network reliability, latency, and scalability.
机译：窄带物联网（NB-IoT）的当前大多数研究工作都集中在增强其网络覆盖范围上。许多现有的NB-IoT信道编码技术都基于重复传输数据和控制信号，以此来增强网络的可靠性，从而实现长距离传输。尽管大多数这些努力是以降低NB-IoT网络的能耗为代价的，但它们并不总是考虑信道条件。因此，这项工作提出了一种新颖的NB-IoT节能自适应信道编码（EEACC）方案。 EEACC方法是一种二维（2D）方法，它不仅基于估计的信道条件（根据定期评估的BLER性能结果从初始动态分类为不良，中等或良好）选择适当的信道编码方案，而且还可以将其最小化在预先评估的成功传输概率下的传输重复次数（基于先前成功传输在传输总数中的比率）。这导致创建单个混合梯度，基于该梯度，在每个传输上选择较高或较低的调制编码方案（MCS）。其目的是通过动态选择适当的调制编码方案（MCS）编号并有效地最小化传输重复编号来提高网络的整体能效。在不同的信道条件（好，中或坏）考虑下执行链路级仿真，以评估针对NB-IoT的建议上行链路自适应技术的性能。获得的结果表明，在实现的能效以及网络可靠性，等待时间和可伸缩性方面，所提出的技术优于现有的窄带链路自适应（NBLA）和传统的重复方案。

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