R(t)with vacations R(t) residual service time X X X V V2 X3 V A customer will always experience some residual time,either because server is on vacation,or is serving a customer Let M(t)=the number of customers served by time t L(t)=the number of vacations taken by time t 0-Σ兰+) Weigiang Sun Communication Networks 10Weiqiang Sun Communication Networks R(t) with vacations • A customer will always experience some residual time, either because server is on vacation, or is serving a customer 10 R(t) residual service time t X1 X1 X2 X3 X4 X2 X3 X4 V1 V2 V3 Let M(t) = the number of customers served by time t L(t) = the number of vacations taken by time t 2 2 ( ) ( ) 1 1 1 ( ) 2 2 M t L t i i i i X V R t t            