From: hchang <[email-masked]>
Date: Thu, 16 May 2002 18:4:27 +0800

hi:)
	can i ask you a question?
	i am doubted about the QOS routing.
	my view is:
	the object of QOS routing is to meet the strict QOS constrain of per-flow,is it right?
	it just fit  the model of guarantee service in Intserv,but as we know ,the Interv has the Scalability problem,
	and now we are interesting in the research of Diffserv model.but in the Differv,flows are aggregated in a PHB unit,
	so how can we guarantee the per-flow QOS in this aggregated model?  e.g the end to end delay is a cumulative QOS parameter,when we queue aggregated flows in the same queue in the router,how can we determine the delay bound in this router for each flow packets?
	so how can we use QOS routing in the Diffserv model?
	
	thank you very much:)