论文标题
IBAC：智能动态带宽频道访问避免外部警告范围问题
IBAC: An Intelligent Dynamic Bandwidth Channel Access Avoiding Outside Warning Range Problem
论文作者
论文摘要
IEEE 802.11AX使用主要和辅助通道的概念，导致动态带宽通道访问（DBCA）机制。通过应用DBCA，无线站可以通过应用通道键合功能选择更宽的通道带宽，例如40/80/160 MHz。但是，在频道粘结期间，不适当的带宽选择会导致碰撞。因此，为避免碰撞，良好的媒体访问控制（MAC）协议对于有效利用通道键合机制至关重要。在本文中，我们讨论了一种称为外部警告范围问题（OWRP）的碰撞方案，这可能会在DBCA期间发生，当时无线站执行通道键合后，无线站与另一个无线站进行干扰。因此，我们提出了一种MAC层机制，即避免碰撞（IBAC）的智能键合，以适应DBCA中的通道粘结水平，以避免OWRP。我们首先设计了基于DBCA的马尔可夫链的理论模型，同时避免了OWRP。基于此模型，我们设计了一种基于汤普森采样的贝叶斯方法，以智能地选择最佳的渠道粘结水平。我们通过模拟分析了IBAC的性能，观察到，与其他竞争机制相比，所提出的方法可以在避免OWRP的同时显着增强网络性能。
IEEE 802.11ax uses the concept of primary and secondary channels, leading to the Dynamic Bandwidth Channel Access (DBCA) mechanism. By applying DBCA, a wireless station can select a wider channel bandwidth, such as 40/80/160 MHz, by applying the channel bonding feature. However, during channel bonding, inappropriate bandwidth selection can cause collisions. Therefore, to avoid collisions, a well-developed media access control (MAC) protocol is crucial to effectively utilize the channel bonding mechanism. In this paper, we address a collision scenario, called Outside Warning Range Problem (OWRP), that may occur during DBCA when a wireless station interferes with another wireless station after channel bonding is performed. Therefore, we propose a MAC layer mechanism, Intelligent Bonding Avoiding Collision (IBAC), that adapts the channel bonding level in DBCA in order to avoid the OWRP. We first design a theoretical model based on Markov chains for DBCA while avoiding the OWRP. Based on this model, we design a Thompson sampling based Bayesian approach to select the best possible channel bonding level intelligently. We analyze the performance of the IBAC through simulations where it is observed that, comparing to other competing mechanisms, the proposed approach can enhance the network performance significantly while avoiding the OWRP.
