B4.12

Applied Probability
Part II, 2001

Define a renewal process and a renewal reward process.

State and prove the strong law of large numbers for these processes.

[You may assume the strong law of large numbers for independent, identically-distributed random variables.

State and prove Little's formula.

Customers arrive according to a Poisson process with rate ν\nu at a single server, but a restricted waiting room causes those who arrive when nn customers are already present to be lost. Accepted customers have service times which are independent and identicallydistributed with mean α\alpha and independent of the arrival process. Let PjP_{j} be the equilibrium probability that an arriving customer finds jj customers already present.

Using Little's formula, or otherwise, determine a relationship between P0,Pn,νP_{0}, P_{n}, \nu and

Part II