Two Rival Approaches
	n Reservations – Call,signal,qos route, route pin, admission control, call log – Hop by hop – Accounting n Principal objective metrics: – User:Call blocking prob. – Net: Erlangs		n Adaption – Congestion signal (loss, ecn, delay) – Feedback control loop – TCP eqn etc etc n Principle objective metrics: – User throughput – Utilisation