  The intelligent reflecting surface (IRS) is an emerging technique to extend
the wireless coverage. In this letter, the performance of hybrid automatic
repeat request (hybrid-ARQ) for an IRS-assisted system is analyzed. More
specifically, the outage performance of the IRS-aided system using hybrid-ARQ
protocol with chase combining is studied. Asymptotic analysis also shows that
the outage performance improves better than linearly by increasing number of
reflectors of the IRS-aided system. The results also verify the potential of
combining the ARQ scheme in the link layer of the IRS-aided system and
demonstrate that very small change of path loss condition can impact the
performance largely.
