论文标题
IEEE 802.11BD中的自适应重复策略
Adaptive Repetitions Strategies in IEEE 802.11bd
论文作者
论文摘要
IEEE BD任务组正在开发一项新的向后兼容的WiFi修正案，朝所谓的IEEE 802.11BD开发，其中包括可以传输同一数据包三个重复的可能性。此功能增加了时间多样性，并可以在接收器上使用最大比率组合（MRC），以提高正确解码的可能性。在这项工作中，我们首先研究数据包重复功能，并分析其失去功效，随着较高数量的传输可能会增加通道负载和碰撞概率。然后，我们提出了两种策略，用于自适应选择在频道繁忙比率（CBR）的适应版本上利用的传输数量，该策略是在发射器上测量的，是通道负载的指示器。提出的策略通过网络级别的仿真来验证，这些模拟既说明了采集和解码过程。结果表明，提出的策略确保设备在可变的交通条件下使用最佳设置。
A new backward compatible WiFi amendment is under development by the IEEE bd Task Group towards the so-called IEEE 802.11bd, which includes the possibility to transmit up to three repetitions of the same packet. This feature increases time diversity and enables the use of maximum ratio combining (MRC) at the receiver to improve the probability of correct decoding. In this work, we first investigate the packet repetition feature and analyze how it looses its efficacy increasing the traffic as an higher number of transmissions may augment the channel load and collision probability. Then, we propose two strategies for adaptively selecting the number of transmissions leveraging on an adapted version of the channel busy ratio (CBR), which is measured at the transmitter and is an indicator of the channel load. The proposed strategies are validated through network-level simulations that account for both the acquisition and decoding processes. Results show that the proposed strategies ensure that devices use optimal settings under variable traffic conditions.
