Analysis of a Cross-Layer Hybrid-ARQ Scheme: Application to Unequal Packet Protection
In order to improve the reliability of any HARQ technique at the IP level, a cross-layer strategy between the MAC and the IP levels has been recently developed. This strategy consists in replacing a re-transmission credit per MAC packet with a retransmission credit per IP packet. In other words, the transmission credit is shared by the MAC packets belonging to the same IP packet. Packet Error Rate, throughput, delay and jitter for this new approach have been extensively analyzed. In this paper, the authors remark and theoretically prove that the first MAC packets are better protected than the last ones.