ARQ Schemes for Broadcast Channel with Random Feedback Delay

We proposed an algorithm for the server in ARQ scheme for broadcast channel. In this study, we consider a model in which the feedback delay is a random variable. Specifically, the feedback delay is different for each packet and receiver. For this model, the algorithm proposed in conventional studies cannot be directly applied. Therefore, we propose an algorithm using windows, which are set for the sequence of packets. It is also found that there is a trade-off between throughput and acceptance time in proposed algorithm.