Potnis Kulkarni Varada, Joshi Radhika D
Department of Electronics and Telecommunication Engineering, COEP Technological University, Formerly College of Engineering Pune, Wellesley Road, Shivajinagar, Pune 411005, India.
Sensors (Basel). 2024 Aug 20;24(16):5369. doi: 10.3390/s24165369.
Energy harvesting combined with spectrum sharing offers a promising solution to the growing demand for spectrum while keeping energy costs low. New Radio Unlicensed (NR-U) technology enables telecom operators to utilize unlicensed spectrum in addition to the licensed spectrum already in use. Along with this, the energy demands for the Internet of Things (IoT) can be met through energy harvesting. In this regard, the ubiquity and ease of implementation make the RF-powered NR-U network a sustainable solution for cellular IoT. Using a Markov chain, we model the NR-U network with nodes powered by the base station (BS). We derive closed-form expressions for the normalized saturated throughput of nodes and the BS, along with the mean packet delay at the node. Additionally, we compute the transmit outage probability of the node. These quality of service (QoS) parameters are analyzed for different values of congestion window size, TXOP parameter, maximum energy level, and energy threshold of the node. Additionally, the effect of network density on collision, transmission, and energy harvesting probabilities is observed. We validate our model through simulations.
能量收集与频谱共享相结合，为不断增长的频谱需求提供了一个有前景的解决方案，同时保持较低的能源成本。新无线电免许可（NR-U）技术使电信运营商除了利用已使用的许可频谱外，还能利用免许可频谱。与此同时，物联网（IoT）的能源需求可以通过能量收集来满足。在这方面，无处不在和易于实施使射频供电的NR-U网络成为蜂窝物联网的可持续解决方案。我们使用马尔可夫链对由基站（BS）供电的节点的NR-U网络进行建模。我们推导了节点和基站的归一化饱和吞吐量以及节点处的平均分组延迟的闭式表达式。此外，我们计算了节点的传输中断概率。针对拥塞窗口大小、TXOP参数、最大能量水平和节点能量阈值的不同值，分析了这些服务质量（QoS）参数。此外，还观察了网络密度对冲突、传输和能量收集概率的影响。我们通过仿真验证了我们的模型。
