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# Concurrent calls

Viewing 8 posts - 1 through 8 (of 8 total)
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kdriver
Guest

Hi,

Can anyone give a rough figure for expected busy hour concurrent calls given a subscriber base. ( lets say 2 million? )

Regards,

Keith

Pix
Guest

Hello kdriver,

the number of calls is not really relevant, what matters more is the volume of traffic (erlangs)

25mErl / subscriber @ BH x 2 millions = 50 000 erlangs

assuming average call duration of 50 seconds (rather realistic )
50.000 erl / 50 = 1.000 calls

So 2 millions subsribers (typical subscribers) will generate about 1000 calls of 50 seconds, at busy hour, during one hour.

To handle 50k Erlangs, you need about 600 BTS with 4/4/4 configuration ๐

Cheers,
pix

kdriver
Guest

Thanks Pix. That gives me the answers I was looking for.

Is 25mErl/sub an industry standard figure?

What do you mean by 4/4/4 configuration for the BTS?

Cheers,

Keith

Pix
Guest

Keith,

Yes, 25mErl/sub is a typical figure

4/4/4 : 1 BTS with 3 sectors, and 4 TRX per sector.

Sector 1 = 4 TRX
Sector 2 = 4 TRX
Sector 3 = 4 TRX

… 4/4/4 … ๐

Pan
Guest

Hello, guys! ๐
Sorry, Pix, but 50 000 Erlangs is enough great value. But 1000 calls per hour is enough small value.
Load intensity=50 000 erl represents the total holding time (in sec)= (50 000*3600)= 180000000.
And, hence,
BHCA=(180000000/50)=3600000 calls, i.e 1,8 calls per subscriber in busy hour.
B.R.

pix
Guest

hi pan,

50.000 erl = # calls * (50s / 3600s)

therefore :

1/ # calls = 3.6 millions
2/ you are 100% right
3/ i’m embarassed ๐

was i drunk when i replied to this message ?

:))

thanks for correcting me !

Cheers & happy new year,
-pix

Pan
Guest

Hello, Pix!
Happy New Year! ๐

TDC
Guest

How to change Erlang to MBPS?

Suppose i have 1000 Erlang in bussy hours, and my max number of concurent call is 1500, so how could found the utilization based on 1500 concurrent call usage?

Viewing 8 posts - 1 through 8 (of 8 total)
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