Ultra-Reliable and Low-Latency Vehicular Communication: An Active Learning Approach
This work addresses the problem of reliable and low-latency communication for vehicular networks, representing an incremental improvement through a novel method for a known bottleneck.
The paper tackles the challenge of allocating transmission power and resource blocks in highly dynamic vehicular networks by proposing an active learning approach that balances minimizing Age of Information (AoI) violation probability and maximizing knowledge of network dynamics, achieving at least a 50% reduction in AoI violation probability compared to baselines.
In this letter, an age of information (AoI)-aware transmission power and resource block (RB) allocation technique for vehicular communication networks is proposed. Due to the highly dynamic nature of vehicular networks, gaining a prior knowledge about the network dynamics, i.e., wireless channels and interference, in order to allocate resources, is challenging. Therefore, to effectively allocate power and RBs, the proposed approach allows the network to actively learn its dynamics by balancing a tradeoff between minimizing the probability that the vehicles' AoI exceeds a predefined threshold and maximizing the knowledge about the network dynamics. In this regard, using a Gaussian process regression (GPR) approach, an online decentralized strategy is proposed to actively learn the network dynamics, estimate the vehicles' future AoI, and proactively allocate resources. Simulation results show a significant improvement in terms of AoI violation probability, compared to several baselines, with a reduction of at least 50%.