The maximum mean time to blocking routing in circuit-switchednetworks

The Maximum Mean Time to Blocking (MTB) Routing is a state- and time-dependent adaptive routing scheme. In this scheme, overflowed calls are routed to an alternate path having the longest mean time to blocking. The mean time to blocking of a link is a function of the trunk group size, the traffic rate, and the instantaneous trunk group occupancy and is a particularly suitable measure of the busy status of links in networks with nonuniform trunk group sizes and asymmetric traffic rates. The computation of the mean time to blocking of a path is very demanding and two approximations are proposed. A comparative performance evaluation through a call-by-call computer simulation shows that the MTB routing can give a superior throughput-blocking performance