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In this paper, the authors propose integration of Random Network Coding (R-NC) sublayer at the Radio Link Control/Multiple Access Control (RLC/MAC) layer boundary within the 3GPP Long Term Evolution (LTE) Radio Access Network (RAN) protocol stack. R-NC is introduced as a simple alternative to the MAC/Physical Layer (PHY) Hybrid Automatic Repeat reQuest (HARQ) protocol for reliable RLC Protocol Data Unit (PDU) transmission over the radio interface between the base station (eNB) and the mobile User Equipment (UE). To evaluate and compare the performance of the R-NC-based solution against the standardized HARQ-based one, they develop a novel link-level simulator which combines packet-level Finite-State Markov Chain (FSMC) channel models and existing LTE PHY layer simulators.
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