Heuristic scheduling for efficient underwater communications with limited feedback capabilities

In this work, we propose and analyze the performance of a scheduler that guarantees to deliver a prescribed number of packets by a given deadline, while minimizing the number of transmission attempts. Channel State Information (CSI) is sent intermittently when considered useful and therefore it can become outdated in some slots. The underwater channel is modeled as a time-varying correlated fading channel, represented by a Markov chain. The performance is evaluated through numerical simulations and results show that the scheduler derived here outperforms those presented in the literature.