论文标题
大规模物联网网络的信息依赖性随机访问
Age-of-Information Dependent Random Access for Massive IoT Networks
论文作者
论文摘要
作为最著名的物联网应用程序（IoT），远程监视现在无处不在。在这些监视应用程序中，当信息更新鲜时，信息通常具有较高的价值。最近提出了一个新的指标，称为信息时代（AOI），以量化各种物联网应用中的信息新鲜度。本文集中于大型物联网网络的面向年龄的随机访问的设计和分析。具体而言，我们设计了一个新的基于固定阈值的新固定阈值随机访问（ADRA）协议，其中每个IoT设备仅在其瞬时AOI超过预定的阈值时才以一定的概率访问通道。我们通过将多个物联网设备的纠结的AOI演变解耦，并将每个设备的解耦AOI演变作为离散时间Markov链进行建模，从而在数学上评估了所提出的ADRA协议的平均AOI。仿真结果验证了我们的理论分析，并确认所提出的ADRA方案的卓越年龄表现超过了面向年龄的随机访问方案。
As the most well-known application of the Internet of Things (IoT), remote monitoring is now pervasive. In these monitoring applications, information usually has a higher value when it is fresher. A new metric, termed the age of information (AoI), has recently been proposed to quantify the information freshness in various IoT applications. This paper concentrates on the design and analysis of age-oriented random access for massive IoT networks. Specifically, we devise a new stationary threshold-based age-dependent random access (ADRA) protocol, in which each IoT device accesses the channel with a certain probability only when its instantaneous AoI exceeds a predetermined threshold. We manage to evaluate the average AoI of the proposed ADRA protocol mathematically by decoupling the tangled AoI evolution of multiple IoT devices and modeling the decoupled AoI evolution of each device as a Discrete-Time Markov Chain. Simulation results validate our theoretical analysis and affirm the superior age performance of the proposed ADRA protocol over the state-of-the-art age-oriented random access schemes.
