A cross-layer HARQ scheme robust to imperfect feedback

Some recent cross-layer HARQ schemes have been designed in order to enhance the system performance at network level. However, these schemes can present high performance losses as soon as the feedback is imperfect. Therefore, the purpose of this paper is to develop a new cross-layer HARQ scheme that is more robust to imperfect feedback, and that still has a cross-layer gain. Numerical simulations reveal that this new scheme presents a trade-off between cross-layer gain and robustness to imperfect feedback, according to the initial distribution of the transmission credits.