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Viewing 15 posts - 1 through 15 (of 19 total)
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• #43814
Victor R. Costa
Guest

Hy,

I have a formula about the SS7 Link Set Measurement but I don’t know if is correct. A person said to me that can be used for transmission and reception…

The formula is:

where:

64000 – link set tax (64 kbs)
3600 – 1 hour = 3600 seconds

Is this formula correct?

Regards,

Victor R. Costa

#43815
Nitesh Patel
Guest

Yes this formula is correct as it is being used by Ericsson Standard Business Object Tool.

#43816
Victor R. Costa
Guest

Thanks Mr. Patel.

Regards,
Victor

#43817
anboo
Guest

Hi Victor,

Why do we multiply MSU’s by 6 ?

-anboo

#43818
Victor R. Costa
Guest

Hi anboo,

Yes, you’re right. It’s because of the overhead.

Victor

#43819
livius
Guest

I don’t understand why do you have to multiply by 8 the sum (MSUS*6 + OCTSIF&SIO) since both terms are already given in octets? Also, would not be more correct to divide by 65536 (64k) instead of 64000? Another aspect is that the link also caries LSSU (Link Status Signal Unit). I have no idea about how many LSSU messages are transmitted and if their number can be safely ignored in link load calculation. Any idea? Thank you.

#43820
Snowstrorm
Guest

livius
You multiply by 8, ‘coz SL rate is given in bits, not octets.
65536 is more correct, but is error is just 2% it isn’t a big deal.

#43821
Snowstorm
Guest

livius
LSSU are very rare messages. They could be ignored without any doubts

#43822
livius
Guest

Thank you Snowstorm for your very fast answer! I missed that, link speed is given in kbps and of course, you have to convert octets to bits. And also it is correct to divide by 64000 (65536 is right only for KBytes).

#43823
DJ
Guest

The overhead should be 7 Right ?

Why it is 6 ?

Regards

#43824
Zee
Guest

Dear All

I am working in IN deptt and I have been given a task to calculate the SS7 link load

The formula that i used is

Total subscribers * (Avg BHCA/sub * AHT) / 3600 = IN load in Erlangs

is this the right formula?i will appreciate any suggestions or corrections

Regards

Zee

#43825
sudeep
Guest

hi what is the maximum link load after which we have to add more signallings as per standards

#43826
rony
Guest

Dear Nitesh patel and else plz let me know that if this formula is correct then y i am getting wrong answers:
i have,
SIF+SIO Octets X=518766
SIF+SIO Octets R=596511
MSUs X=3025
MSUs R=4272

SIF+SIO = SIF+SIO X + SIF+SIO R
SIF+SIO = 518766 + 596511 =1115277

MSUs=MSUs X + MSUs R
MSUs=3025+4272=7297

using,

this is load calculated by using this formula but ithink it should be near 0.40 to get 40% load on each link.Note I have calculated link load but not link set load so I have neglected ‘N’.plz help me in this regard.ITS URGENT AND IMPORTANT

Thanks
RONY

#43827
Smith
Guest

Dear Rony! your all calculations are wrong and the values of MSUs and SIF are not accurate and in a right form to put in this formula.U r doing wrong somewhere,formula is right but ur stats and substitution of values is wrong…..work hard and read more,thanks

#43828