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The paper addresses multiuser power and bandwidth allocation in an OFDMA system using HARQ for a Rayleigh channel. New algorithms for minimizing the total transmit power under individual rate and delay constraints are proposed.
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...
We aim to study a specific cross-layer optimized Hybrid Automatic Retransmission reQuest (HARQ) introduced in [1] and called early-drop HARQ. We remind that in [1], instead of giving a transmission credit per MAC packet (as usually done), it is proposed to share the transmission credit among all the MAC packets belonging to the same IP packet. The early-drop version stops the retransmission as soon...
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