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Engset's model of resource blocking with a finite population has recently been generalized to allow blocked users to have a recovery time before they re-enter contention for the resources. We propose an algorithm to find the stationary distribution of the resulting level-dependent quasi-birth-and-death (LDQBD) process, and hence the blocking probability. Its running time is linear in the number of...
As of April 2013 almost 95% of the IPv4 address space has been allocated. Yet, the transition to IPv6 is still relatively slow. One reason could be existing “IPv4 reserves” - allocated but unused IPv4 addresses. Knowing how many addresses are actively used is important to predict a potential IPv4 address market, predict the IPv6 deployment time frame, and measure progressive exhaustion after the IPv4...
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