RE: [PCN] Architecture draft - probing section & general updates.

["Geib, Ruediger" <[e-mail]>]

Hi Anna,

thanks, I understand your explanation. 

Regards,

Rudiger


|-----Original Message-----
|From: Anna Charny (acharny) [mailto:[e-mail]]
|Sent: Tuesday, October 23, 2007 3:38 PM
|To: Geib, Rudiger
|Cc: [e-mail]
|Subject: RE: [PCN] Architecture draft - probing section & general
|updates.
|
|
|Hi Ruediger,
|
|I meant roughly the following. Suppose many ingress-egress aggregates
|have on the average 1 flow.  If you have just one flow per
|ingress-egress aggregate, when this flow arrives and is the only one
|active in its ingress-egress pair, and if no probing of any kind is 
|used, then effectively there is no admission control for this 
|aggregate.  If many such aggregates share a bottleneck, then 
|effectively all these ingress-egress aggregates have to be admitted
|regardless of the state of the bottleneck.  In the extreme, if all
|ingress-egress aggregates sharing a bottleneck consist of one flow, 
|then this bottleneck effectively does not have any admission control.
|In such situations probing might be quite useful, as it will enable
|admission control. 
|
|Of course one does not have to require that *all* ingress-egress
|aggregates sharing a bottleneck have just one flow to have a similar
|problem - just enough of them on the average to take a substantial 
|share of the bottleneck bandwidth.
|
|Does it make sense?
|Anna 
|
|> -----Original Message-----
|> From: Geib, Ruediger [mailto:[e-mail]] 
|> Sent: Tuesday, October 23, 2007 4:26 AM
|> To: Anna Charny (acharny)
|> Cc: [e-mail]
|> Subject: RE: [PCN] Architecture draft - probing section & 
|> general updates.
|> 
|> Anna,
|> 
|> could you re-write your point? I don't get the sense completely.
|> 
|> Thanks,
|> 
|> Rudiger
|> 
|> 
|> |   - should the WG consider the case when expected number of 
|> flows on 
|> |very large number of ingress-egress aggregates sharing a 
|> bottleneck has 
|> |on the order of *one* flow.  Note that this is the case 
|when probing 
|> |might be needed.
|> 
|


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