Simulation of Selective Repeat ARQ protocol

a simulation of the Selective Repeat ARQ protocol

This code is a Matlab simulation of the Selective Repeat ARQ protocol, including an accounting of the frame transmission delay from sender to receiver, and the Ack delay from receiver to sender.
I am new to the world of ARQ (my studies have mostly focused on one-way FEC), so I would very much appreciate constructive criticism regarding enhancing this code by, for example: including comparisons with theoretical performance, or incorporating other "real world effects".