The method of claim 20, wherein RTO.sub.max is determined using an equation: RTO.sub.max=L.sub.a-D.sub.e-.alpha.J.sub.e)/(I+1), where L.sub.a is a transmission latency requirement, D.sub.e is a transmission transfer delay, .alpha. is apre-determined constant, J.sub.e is a jitter delay, and I is a number re-transmissions.23.