Errors in efpa · Two effects;: · overf|ows connection requires a multi-hop path to be established I Overflow Error Path Error Poisson error underestimate overestimate Independence Error underestimate overestimate Overflow error--ignoring high variance of overflow traffic and dependence correlation of trunk occupancy along the path that increases the ve Path error--ignores the effect of traffic smoothing and the posi probability to admit calls
Errors in EFPA • Two effects: • overflows • connection requires a multi-hop path to be established. • Overflow error -- ignoring high variance of overflow traffic and dependence • Path error-- ignores the effect of traffic smoothing, and the positive correlation of trunk occupancy along the path that increases the probability to admit calls 11
Overflow Priority classification Approximation(OPCA) Impose fictitious preemptive priority structure to a given mode Junior calls Senior calls pply efPa-like algorithm in the fictitious model Better approximation in most cases Increase the proportion of junior calls in the network Reduce overflow error and path error
Overflow Priority classification Approximation (OPCA) • Impose fictitious preemptive priority structure to a given model – Junior calls – Senior calls • Apply EFPA-like algorithm in the fictitious model • Better approximation in most cases – Increase the proportion of junior calls in the network – Reduce overflow error and path error 12
Construct the Fm True model from the tM Fictitious (TM) Model (Fm) Apply efpa to the Apply efpa to the TM FM Estimation of Estimation of TM FM
13 True Model (TM) Estimation of TM Apply EFPA to the TM Fictitious Model (FM) Construct the FM from the TM Estimation of FM Apply EFPA to the FM
Circuit Switched Networks with long lived and short -ived connections Permanent or semi-permanent connection between major cities On-demand short-lived connections between individual od pairs of users in the order of seconds or less Long-lived connection Short-lived connection
Circuit Switched Networks with longlived and short-lived connections • Permanent or semi-permanent connection between major cities • On-demand short-lived connections between individual OD pairs of users in the order of seconds or less • Long-lived connection • Short-lived connection 14
Priority long-lived connections can be booked well in advance long-lived connections between major cities or data centers carry traffic from many users, so it is justifiable for them to have preemptive priority over the short-lived ones
Priority • long-lived connections can be booked well in advance. • long-lived connections between major cities or data centers carry traffic from many users, so it is justifiable for them to have preemptive priority over the short-lived ones. 15