Performance of a class of retransmission protocols in case of variable feedback delays
Koen De Turck, Stijn De Vuyst, Sabine Wittevrongel · Ghent University Academic Bibliography (Ghent University) · 2007
We consider ARQ retransmission protocols in situations where the length of the feedback delay is modeled by a random process. To keep the analysis tractable, we introduce minor modifications to the standard selective repeat and go-back-N protocols. We study the case where packet errors and feedback delay, lengths are independent and identically distributed, as well as the case where both of these system characteristics depend on a Markovian background process with a finite number of states. For both cases we derive stability conditions and closed form expressions for the distribution of the buffer content at the sender side. Numerical examples show a deterioration of the performance under variable feedback delays.