论文标题
D2D辅助的Lorawan LR-FHSS在直接到卫星IoT网络中
D2D-aided LoRaWAN LR-FHSS in Direct-to-Satellite IoT Networks
论文作者
论文摘要
在本文中，我们提出了一种设备对设备（D2D）传输方案，用于协助长期频率跳扩散频谱（LR-FHSS）Lorawan协议，并在直接到卫星IoT网络中应用。我们考虑了实用的地面到卫星褪色模型，即阴影式频道，并得出LR-FHSS网络的中断性能。在网络编码的帮助下，提出了D2D辅助的LR-FHSS传输方案，以提高还得出封闭形式的中断概率表达式的网络容量。通过计算机仿真，用于捕获噪声，褪色，未透明的基于ALOHA的时间调度，接收器的捕获效果，从NOT设备分布以及从NODE到NODE的距离，从NRRE，IOT分布，从NODE，距离，距离，从NRR-FHSS和D2D辅助的LR-FHSS和D2D辅助的LR-FHSS中获得的分析表达式得到了验证。与LR-FHS相比，D2D AID的LR-FHSS的总停电概率分别显示出249.9％和150.1％的网络容量，而DR6和DR5的典型中断为10^-2。这是以每种d2D方案在每个时间段中施加的每个物联网端设备的最低和最多两次额外传输的成本获得的。
In this paper, we present a device-to-device (D2D) transmission scheme for aiding long-range frequency hopping spread spectrum (LR-FHSS) LoRaWAN protocol with application in direct-to-satellite IoT networks. We consider a practical ground-to-satellite fading model, i.e. shadowed-Rice channel, and derive the outage performance of the LR-FHSS network. With the help of network coding, D2D-aided LR-FHSS transmission scheme is proposed to improve the network capacity for which a closed-form outage probability expression is also derived. The obtained analytical expressions for both LR-FHSS and D2D-aided LR-FHSS outage probabilities are validated by computer simulations for different parts of the analysis capturing the effects of noise, fading, unslotted ALOHA-based time scheduling, the receiver's capture effect, IoT device distributions, and distance from node to satellite. The total outage probability for the D2D-aided LR-FHSS shows a considerable increase of 249.9% and 150.1% in network capacity at a typical outage of 10^-2 for DR6 and DR5, respectively, when compared to LR-FHSS. This is obtained at the cost of minimum of one and maximum of two additional transmissions per each IoT end device imposed by the D2D scheme in each time-slot.
