Cognitive Communication in Rail Transit: Awareness, Adaption, and Reasoning
Cheng Feng Wu, Yiming Wang · IT Professional · 2017
Wireless communication plays a vital role in the operations of modern rail transportation. The characteristics of rapid train motion make the wireless spectrum environment unstable, discontinuous, and unpredictable. These uncertainties, coupled with inherent spectrum scarcity, result in inefficiencies in wireless communication. Applying cognitive radio in railway wireless communication systems is a cutting-edge research field. Most rail cognitive radio studies focus only on solving spectrum scarcity. The authors' improved rail cognitive radio model uses a Bayesian network with numerous channel contextual features to probabilistically infer the likelihood of spectrum accessibility. This scheme provides a completely new way to solve the problem of low spectral efficiency of cognitive radio in rail transit.