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Re: Another Point Of View (Round 2)
At 10:33 PM +0000 11/29/96, Mike Bilow wrote:
>think should be obvious to anyone who made it past high school math, the only
>real issue is whether the value of d is different for voice calls and data
No, this is not correct. This false assumption is the root of your error.
The two probability density functions have completely different forms.
Poisson distributions have much smaller standard deviations than Power Law
distributions even if the means are equal. (You can see this just by
looking at histograms of raw call data.) The "flatter" nature of measured
internet call holding-time distribution functions includes many more long
holding-time calls than would be produced by an exponential distribution.
Most significantly, these longer holding-time calls have a disproportionate
impact on total call-minutes, which is one of the two real load issues you
correctly identified. The second is the overall Quality of Service impact
of having large hunt groups tied up with 30+ CCS of traffic.
I'll try to run down a current technical reference on the PDFs if you're
really interested in understanding this, it's been a long time since my
traffic modelling days back at Bell Labs.