Performance analysis on selective repeat ARQ with finite buffer

We present a numerical computation method called the sequential method for the performance analysis on pure SR ARQ. An approximate method named the stable function method is presented to improve the computation efficiency of the sequential method. For the first time, the two methods give a relatively accurate relationship between the throughput and the physical error ratio, the channel bandwidth, the transfer delay, and any size of buffer. The methods are especially useful for throughput analysis in a broadband satellite ATM case, where the bandwidth delay product is very large. They are also compared with other previous available methods. Comparison results show our method have a quite higher accuracy than other methods, especially in the large bandwidth delay product case.