Queueing behavior of Hybrid ARQ wireless system with finite buffer capacity

The queueing behavior of Hybrid Automatic Repeat reQuest (ARQ) system over wireless channel is analyzed in this paper. The wireless channel is modeled as a two-state Markovian process. Arriving packets, which are saved in a first-in-first-out (FIFO) buffer before being transmitted over a wireless channel, may be blocked due to buffer overflow. We obtain the closed-form expressions of queueing state probabilities and queueing delay. For large buffer capacity, we derive a new coefficient of the exponential approximation for buffer overflow probability which fits the simulation results much better than before.