Performance of Selective Repeat with Errors
without errors:
- U = 1 if N> 1+2a else = N/ (1+2a)
U = time to send 1 frame / total time per frame *Nr
- where Nr = number of times must be resent
U = 1/ Nr if N> 1+2a else N/ (1+2a)*Nr
again Nr = __f(i) P i-1(1-P) = 1/ (1-P)
thus U = (1-P) if N>1+2a else (1-P)N/ (1+2a)