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Many models for TCP throughput prediction were proposed in the literature. However, the first ones only considered the most common networks at that time: wired networks. Thus, these models could not predict the behavior of a network that included wireless links. Also, different link layer protocols had to be considered, resulting in different modifications of the former throughput prediction models. During our research on TCP models, we have found an interesting modification including ARQ, which is one of our objects of study. Also, this modification proposed a new frame retransmission scheme, which could reduce the TCP segment loss probability in a wireless link. However, when we tried to use this modified model, some errors appeared. For instance, the equation to calculate the average frame retransmissions number did not consider all the error possibilities. Thus, we decided to make some corrections in order to use this model in future works. Based on the corrected model, new comparisons were made and new conclusions, different from the original ones, were achieved.