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For several years, HARQ schemes have been extensively analysed in terms of Packet Error Rate and Efficiency at the MAC level. Nevertheless, in order to get realistic performance of the whole system, performance analysis at the IP level is crucial. Therefore, we derive in closed-form expressions the performance (Packet Error Rate and Efficiency) of any HARQ scheme (ARQ, Incremental Redundancy HARQ, Chase Combining) at the IP level. Moreover cross-layer optimization strategy between MAC and IP layers for HARQ schemes developed initially by [9] for ARQ schemes is considered.

New ARQ or HARQ schemes taking into account the link between the MAC and IP layers have been recently introduced. In this paper, we analyze these new schemes in terms of delay and jitter by deriving these metrics in closedform expressions at the IP level. As the framework developed for obtaining such terms in closed-form is generic, we show that the proposed expressions hold for any standard ARQ or HARQ scheme (ARQ, Incremental Redundancy HARQ, Chase Combining HARQ without cross-layer optimization) at any level (MAC or IP).

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